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 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         # this must be last entry (for manipulation from JavaScript)
 764         javascript => "js"
 765 );
 766 our %cgi_param_mapping = @cgi_param_mapping;
 767
 768 # we will also need to know the possible actions, for validation
 769 our %actions = (
 770         "blame" => \&git_blame,
 771         "blame_incremental" => \&git_blame_incremental,
 772         "blame_data" => \&git_blame_data,
 773         "blobdiff" => \&git_blobdiff,
 774         "blobdiff_plain" => \&git_blobdiff_plain,
 775         "blob" => \&git_blob,
 776         "blob_plain" => \&git_blob_plain,
 777         "commitdiff" => \&git_commitdiff,
 778         "commitdiff_plain" => \&git_commitdiff_plain,
 779         "commit" => \&git_commit,
 780         "forks" => \&git_forks,
 781         "heads" => \&git_heads,
 782         "history" => \&git_history,
 783         "log" => \&git_log,
 784         "patch" => \&git_patch,
 785         "patches" => \&git_patches,
 786         "remotes" => \&git_remotes,
 787         "rss" => \&git_rss,
 788         "atom" => \&git_atom,
 789         "search" => \&git_search,
 790         "search_help" => \&git_search_help,
 791         "shortlog" => \&git_shortlog,
 792         "summary" => \&git_summary,
 793         "tag" => \&git_tag,
 794         "tags" => \&git_tags,
 795         "tree" => \&git_tree,
 796         "snapshot" => \&git_snapshot,
 797         "object" => \&git_object,
 798         # those below don't need $project
 799         "opml" => \&git_opml,
 800         "project_list" => \&git_project_list,
 801         "project_index" => \&git_project_index,
 802 );
 803
 804 # finally, we have the hash of allowed extra_options for the commands that
 805 # allow them
 806 our %allowed_options = (
 807         "--no-merges" => [ qw(rss atom log shortlog history) ],
 808 );
 809
 810 # fill %input_params with the CGI parameters. All values except for 'opt'
 811 # should be single values, but opt can be an array. We should probably
 812 # build an array of parameters that can be multi-valued, but since for the time
 813 # being it's only this one, we just single it out
 814 sub evaluate_query_params {
 815         our $cgi;
 816
 817         while (my ($name, $symbol) = each %cgi_param_mapping) {
 818                 if ($symbol eq 'opt') {
 819                         $input_params{$name} = [ $cgi->param($symbol) ];
 820                 } else {
 821                         $input_params{$name} = $cgi->param($symbol);
 822                 }
 823         }
 824 }
 825
 826 # now read PATH_INFO and update the parameter list for missing parameters
 827 sub evaluate_path_info {
 828         return if defined $input_params{'project'};
 829         return if !$path_info;
 830         $path_info =~ s,^/+,,;
 831         return if !$path_info;
 832
 833         # find which part of PATH_INFO is project
 834         my $project = $path_info;
 835         $project =~ s,/+$,,;
 836         while ($project && !check_head_link("$projectroot/$project")) {
 837                 $project =~ s,/*[^/]*$,,;
 838         }
 839         return unless $project;
 840         $input_params{'project'} = $project;
 841
 842         # do not change any parameters if an action is given using the query string
 843         return if $input_params{'action'};
 844         $path_info =~ s,^\Q$project\E/*,,;
 845
 846         # next, check if we have an action
 847         my $action = $path_info;
 848         $action =~ s,/.*$,,;
 849         if (exists $actions{$action}) {
 850                 $path_info =~ s,^$action/*,,;
 851                 $input_params{'action'} = $action;
 852         }
 853
 854         # list of actions that want hash_base instead of hash, but can have no
 855         # pathname (f) parameter
 856         my @wants_base = (
 857                 'tree',
 858                 'history',
 859         );
 860
 861         # we want to catch, among others
 862         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 863         my ($parentrefname, $parentpathname, $refname, $pathname) =
 864                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 865
 866         # first, analyze the 'current' part
 867         if (defined $pathname) {
 868                 # we got "branch:filename" or "branch:dir/"
 869                 # we could use git_get_type(branch:pathname), but:
 870                 # - it needs $git_dir
 871                 # - it does a git() call
 872                 # - the convention of terminating directories with a slash
 873                 #   makes it superfluous
 874                 # - embedding the action in the PATH_INFO would make it even
 875                 #   more superfluous
 876                 $pathname =~ s,^/+,,;
 877                 if (!$pathname || substr($pathname, -1) eq "/") {
 878                         $input_params{'action'} ||= "tree";
 879                         $pathname =~ s,/$,,;
 880                 } else {
 881                         # the default action depends on whether we had parent info
 882                         # or not
 883                         if ($parentrefname) {
 884                                 $input_params{'action'} ||= "blobdiff_plain";
 885                         } else {
 886                                 $input_params{'action'} ||= "blob_plain";
 887                         }
 888                 }
 889                 $input_params{'hash_base'} ||= $refname;
 890                 $input_params{'file_name'} ||= $pathname;
 891         } elsif (defined $refname) {
 892                 # we got "branch". In this case we have to choose if we have to
 893                 # set hash or hash_base.
 894                 #
 895                 # Most of the actions without a pathname only want hash to be
 896                 # set, except for the ones specified in @wants_base that want
 897                 # hash_base instead. It should also be noted that hand-crafted
 898                 # links having 'history' as an action and no pathname or hash
 899                 # set will fail, but that happens regardless of PATH_INFO.
 900                 if (defined $parentrefname) {
 901                         # if there is parent let the default be 'shortlog' action
 902                         # (for http://git.example.com/repo.git/A..B links); if there
 903                         # is no parent, dispatch will detect type of object and set
 904                         # action appropriately if required (if action is not set)
 905                         $input_params{'action'} ||= "shortlog";
 906                 }
 907                 if ($input_params{'action'} &&
 908                     grep { $_ eq $input_params{'action'} } @wants_base) {
 909                         $input_params{'hash_base'} ||= $refname;
 910                 } else {
 911                         $input_params{'hash'} ||= $refname;
 912                 }
 913         }
 914
 915         # next, handle the 'parent' part, if present
 916         if (defined $parentrefname) {
 917                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 918                 # someproject/blobdiff/oldrev..newrev:/filename
 919                 if ($parentpathname) {
 920                         $parentpathname =~ s,^/+,,;
 921                         $parentpathname =~ s,/$,,;
 922                         $input_params{'file_parent'} ||= $parentpathname;
 923                 } else {
 924                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 925                 }
 926                 # we assume that hash_parent_base is wanted if a path was specified,
 927                 # or if the action wants hash_base instead of hash
 928                 if (defined $input_params{'file_parent'} ||
 929                         grep { $_ eq $input_params{'action'} } @wants_base) {
 930                         $input_params{'hash_parent_base'} ||= $parentrefname;
 931                 } else {
 932                         $input_params{'hash_parent'} ||= $parentrefname;
 933                 }
 934         }
 935
 936         # for the snapshot action, we allow URLs in the form
 937         # $project/snapshot/$hash.ext
 938         # where .ext determines the snapshot and gets removed from the
 939         # passed $refname to provide the $hash.
 940         #
 941         # To be able to tell that $refname includes the format extension, we
 942         # require the following two conditions to be satisfied:
 943         # - the hash input parameter MUST have been set from the $refname part
 944         #   of the URL (i.e. they must be equal)
 945         # - the snapshot format MUST NOT have been defined already (e.g. from
 946         #   CGI parameter sf)
 947         # It's also useless to try any matching unless $refname has a dot,
 948         # so we check for that too
 949         if (defined $input_params{'action'} &&
 950                 $input_params{'action'} eq 'snapshot' &&
 951                 defined $refname && index($refname, '.') != -1 &&
 952                 $refname eq $input_params{'hash'} &&
 953                 !defined $input_params{'snapshot_format'}) {
 954                 # We loop over the known snapshot formats, checking for
 955                 # extensions. Allowed extensions are both the defined suffix
 956                 # (which includes the initial dot already) and the snapshot
 957                 # format key itself, with a prepended dot
 958                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 959                         my $hash = $refname;
 960                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 961                                 next;
 962                         }
 963                         my $sfx = $1;
 964                         # a valid suffix was found, so set the snapshot format
 965                         # and reset the hash parameter
 966                         $input_params{'snapshot_format'} = $fmt;
 967                         $input_params{'hash'} = $hash;
 968                         # we also set the format suffix to the one requested
 969                         # in the URL: this way a request for e.g. .tgz returns
 970                         # a .tgz instead of a .tar.gz
 971                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 972                         last;
 973                 }
 974         }
 975 }
 976
 977 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 978      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 979      $searchtext, $search_regexp);
 980 sub evaluate_and_validate_params {
 981         our $action = $input_params{'action'};
 982         if (defined $action) {
 983                 if (!validate_action($action)) {
 984                         die_error(400, "Invalid action parameter");
 985                 }
 986         }
 987
 988         # parameters which are pathnames
 989         our $project = $input_params{'project'};
 990         if (defined $project) {
 991                 if (!validate_project($project)) {
 992                         undef $project;
 993                         die_error(404, "No such project");
 994                 }
 995         }
 996
 997         our $file_name = $input_params{'file_name'};
 998         if (defined $file_name) {
 999                 if (!validate_pathname($file_name)) {
1000                         die_error(400, "Invalid file parameter");
1001                 }
1002         }
1003
1004         our $file_parent = $input_params{'file_parent'};
1005         if (defined $file_parent) {
1006                 if (!validate_pathname($file_parent)) {
1007                         die_error(400, "Invalid file parent parameter");
1008                 }
1009         }
1010
1011         # parameters which are refnames
1012         our $hash = $input_params{'hash'};
1013         if (defined $hash) {
1014                 if (!validate_refname($hash)) {
1015                         die_error(400, "Invalid hash parameter");
1016                 }
1017         }
1018
1019         our $hash_parent = $input_params{'hash_parent'};
1020         if (defined $hash_parent) {
1021                 if (!validate_refname($hash_parent)) {
1022                         die_error(400, "Invalid hash parent parameter");
1023                 }
1024         }
1025
1026         our $hash_base = $input_params{'hash_base'};
1027         if (defined $hash_base) {
1028                 if (!validate_refname($hash_base)) {
1029                         die_error(400, "Invalid hash base parameter");
1030                 }
1031         }
1032
1033         our @extra_options = @{$input_params{'extra_options'}};
1034         # @extra_options is always defined, since it can only be (currently) set from
1035         # CGI, and $cgi->param() returns the empty array in array context if the param
1036         # is not set
1037         foreach my $opt (@extra_options) {
1038                 if (not exists $allowed_options{$opt}) {
1039                         die_error(400, "Invalid option parameter");
1040                 }
1041                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1042                         die_error(400, "Invalid option parameter for this action");
1043                 }
1044         }
1045
1046         our $hash_parent_base = $input_params{'hash_parent_base'};
1047         if (defined $hash_parent_base) {
1048                 if (!validate_refname($hash_parent_base)) {
1049                         die_error(400, "Invalid hash parent base parameter");
1050                 }
1051         }
1052
1053         # other parameters
1054         our $page = $input_params{'page'};
1055         if (defined $page) {
1056                 if ($page =~ m/[^0-9]/) {
1057                         die_error(400, "Invalid page parameter");
1058                 }
1059         }
1060
1061         our $searchtype = $input_params{'searchtype'};
1062         if (defined $searchtype) {
1063                 if ($searchtype =~ m/[^a-z]/) {
1064                         die_error(400, "Invalid searchtype parameter");
1065                 }
1066         }
1067
1068         our $search_use_regexp = $input_params{'search_use_regexp'};
1069
1070         our $searchtext = $input_params{'searchtext'};
1071         our $search_regexp;
1072         if (defined $searchtext) {
1073                 if (length($searchtext) < 2) {
1074                         die_error(403, "At least two characters are required for search parameter");
1075                 }
1076                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1077         }
1078 }
1079
1080 # path to the current git repository
1081 our $git_dir;
1082 sub evaluate_git_dir {
1083         our $git_dir = "$projectroot/$project" if $project;
1084 }
1085
1086 our (@snapshot_fmts, $git_avatar);
1087 sub configure_gitweb_features {
1088         # list of supported snapshot formats
1089         our @snapshot_fmts = gitweb_get_feature('snapshot');
1090         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1091
1092         # check that the avatar feature is set to a known provider name,
1093         # and for each provider check if the dependencies are satisfied.
1094         # if the provider name is invalid or the dependencies are not met,
1095         # reset $git_avatar to the empty string.
1096         our ($git_avatar) = gitweb_get_feature('avatar');
1097         if ($git_avatar eq 'gravatar') {
1098                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1099         } elsif ($git_avatar eq 'picon') {
1100                 # no dependencies
1101         } else {
1102                 $git_avatar = '';
1103         }
1104 }
1105
1106 # custom error handler: 'die <message>' is Internal Server Error
1107 sub handle_errors_html {
1108         my $msg = shift; # it is already HTML escaped
1109
1110         # to avoid infinite loop where error occurs in die_error,
1111         # change handler to default handler, disabling handle_errors_html
1112         set_message("Error occured when inside die_error:\n$msg");
1113
1114         # you cannot jump out of die_error when called as error handler;
1115         # the subroutine set via CGI::Carp::set_message is called _after_
1116         # HTTP headers are already written, so it cannot write them itself
1117         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1118 }
1119 set_message(\&handle_errors_html);
1120
1121 # dispatch
1122 sub dispatch {
1123         if (!defined $action) {
1124                 if (defined $hash) {
1125                         $action = git_get_type($hash);
1126                         $action or die_error(404, "Object does not exist");
1127                 } elsif (defined $hash_base && defined $file_name) {
1128                         $action = git_get_type("$hash_base:$file_name");
1129                         $action or die_error(404, "File or directory does not exist");
1130                 } elsif (defined $project) {
1131                         $action = 'summary';
1132                 } else {
1133                         $action = 'project_list';
1134                 }
1135         }
1136         if (!defined($actions{$action})) {
1137                 die_error(400, "Unknown action");
1138         }
1139         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1140             !$project) {
1141                 die_error(400, "Project needed");
1142         }
1143         $actions{$action}->();
1144 }
1145
1146 sub reset_timer {
1147         our $t0 = [ gettimeofday() ]
1148                 if defined $t0;
1149         our $number_of_git_cmds = 0;
1150 }
1151
1152 our $first_request = 1;
1153 sub run_request {
1154         reset_timer();
1155
1156         evaluate_uri();
1157         if ($first_request) {
1158                 evaluate_gitweb_config();
1159                 evaluate_git_version();
1160         }
1161         if ($per_request_config) {
1162                 if (ref($per_request_config) eq 'CODE') {
1163                         $per_request_config->();
1164                 } elsif (!$first_request) {
1165                         evaluate_gitweb_config();
1166                 }
1167         }
1168         check_loadavg();
1169
1170         # $projectroot and $projects_list might be set in gitweb config file
1171         $projects_list ||= $projectroot;
1172
1173         evaluate_query_params();
1174         evaluate_path_info();
1175         evaluate_and_validate_params();
1176         evaluate_git_dir();
1177
1178         configure_gitweb_features();
1179
1180         dispatch();
1181 }
1182
1183 our $is_last_request = sub { 1 };
1184 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1185 our $CGI = 'CGI';
1186 our $cgi;
1187 sub configure_as_fcgi {
1188         require CGI::Fast;
1189         our $CGI = 'CGI::Fast';
1190
1191         my $request_number = 0;
1192         # let each child service 100 requests
1193         our $is_last_request = sub { ++$request_number > 100 };
1194 }
1195 sub evaluate_argv {
1196         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1197         configure_as_fcgi()
1198                 if $script_name =~ /\.fcgi$/;
1199
1200         return unless (@ARGV);
1201
1202         require Getopt::Long;
1203         Getopt::Long::GetOptions(
1204                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1205                 'nproc|n=i' => sub {
1206                         my ($arg, $val) = @_;
1207                         return unless eval { require FCGI::ProcManager; 1; };
1208                         my $proc_manager = FCGI::ProcManager->new({
1209                                 n_processes => $val,
1210                         });
1211                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1212                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1213                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1214                 },
1215         );
1216 }
1217
1218 sub run {
1219         evaluate_argv();
1220
1221         $first_request = 1;
1222         $pre_listen_hook->()
1223                 if $pre_listen_hook;
1224
1225  REQUEST:
1226         while ($cgi = $CGI->new()) {
1227                 $pre_dispatch_hook->()
1228                         if $pre_dispatch_hook;
1229
1230                 run_request();
1231
1232                 $post_dispatch_hook->()
1233                         if $post_dispatch_hook;
1234                 $first_request = 0;
1235
1236                 last REQUEST if ($is_last_request->());
1237         }
1238
1239  DONE_GITWEB:
1240         1;
1241 }
1242
1243 run();
1244
1245 if (defined caller) {
1246         # wrapped in a subroutine processing requests,
1247         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1248         return;
1249 } else {
1250         # pure CGI script, serving single request
1251         exit;
1252 }
1253
1254 ## ======================================================================
1255 ## action links
1256
1257 # possible values of extra options
1258 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1259 # -replay => 1      - start from a current view (replay with modifications)
1260 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1261 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1262 sub href {
1263         my %params = @_;
1264         # default is to use -absolute url() i.e. $my_uri
1265         my $href = $params{-full} ? $my_url : $my_uri;
1266
1267         # implicit -replay, must be first of implicit params
1268         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1269
1270         $params{'project'} = $project unless exists $params{'project'};
1271
1272         if ($params{-replay}) {
1273                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1274                         if (!exists $params{$name}) {
1275                                 $params{$name} = $input_params{$name};
1276                         }
1277                 }
1278         }
1279
1280         my $use_pathinfo = gitweb_check_feature('pathinfo');
1281         if (defined $params{'project'} &&
1282             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1283                 # try to put as many parameters as possible in PATH_INFO:
1284                 #   - project name
1285                 #   - action
1286                 #   - hash_parent or hash_parent_base:/file_parent
1287                 #   - hash or hash_base:/filename
1288                 #   - the snapshot_format as an appropriate suffix
1289
1290                 # When the script is the root DirectoryIndex for the domain,
1291                 # $href here would be something like http://gitweb.example.com/
1292                 # Thus, we strip any trailing / from $href, to spare us double
1293                 # slashes in the final URL
1294                 $href =~ s,/$,,;
1295
1296                 # Then add the project name, if present
1297                 $href .= "/".esc_path_info($params{'project'});
1298                 delete $params{'project'};
1299
1300                 # since we destructively absorb parameters, we keep this
1301                 # boolean that remembers if we're handling a snapshot
1302                 my $is_snapshot = $params{'action'} eq 'snapshot';
1303
1304                 # Summary just uses the project path URL, any other action is
1305                 # added to the URL
1306                 if (defined $params{'action'}) {
1307                         $href .= "/".esc_path_info($params{'action'})
1308                                 unless $params{'action'} eq 'summary';
1309                         delete $params{'action'};
1310                 }
1311
1312                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1313                 # stripping nonexistent or useless pieces
1314                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1315                         || $params{'hash_parent'} || $params{'hash'});
1316                 if (defined $params{'hash_base'}) {
1317                         if (defined $params{'hash_parent_base'}) {
1318                                 $href .= esc_path_info($params{'hash_parent_base'});
1319                                 # skip the file_parent if it's the same as the file_name
1320                                 if (defined $params{'file_parent'}) {
1321                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1322                                                 delete $params{'file_parent'};
1323                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1324                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1325                                                 delete $params{'file_parent'};
1326                                         }
1327                                 }
1328                                 $href .= "..";
1329                                 delete $params{'hash_parent'};
1330                                 delete $params{'hash_parent_base'};
1331                         } elsif (defined $params{'hash_parent'}) {
1332                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1333                                 delete $params{'hash_parent'};
1334                         }
1335
1336                         $href .= esc_path_info($params{'hash_base'});
1337                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1338                                 $href .= ":/".esc_path_info($params{'file_name'});
1339                                 delete $params{'file_name'};
1340                         }
1341                         delete $params{'hash'};
1342                         delete $params{'hash_base'};
1343                 } elsif (defined $params{'hash'}) {
1344                         $href .= esc_path_info($params{'hash'});
1345                         delete $params{'hash'};
1346                 }
1347
1348                 # If the action was a snapshot, we can absorb the
1349                 # snapshot_format parameter too
1350                 if ($is_snapshot) {
1351                         my $fmt = $params{'snapshot_format'};
1352                         # snapshot_format should always be defined when href()
1353                         # is called, but just in case some code forgets, we
1354                         # fall back to the default
1355                         $fmt ||= $snapshot_fmts[0];
1356                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1357                         delete $params{'snapshot_format'};
1358                 }
1359         }
1360
1361         # now encode the parameters explicitly
1362         my @result = ();
1363         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1364                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1365                 if (defined $params{$name}) {
1366                         if (ref($params{$name}) eq "ARRAY") {
1367                                 foreach my $par (@{$params{$name}}) {
1368                                         push @result, $symbol . "=" . esc_param($par);
1369                                 }
1370                         } else {
1371                                 push @result, $symbol . "=" . esc_param($params{$name});
1372                         }
1373                 }
1374         }
1375         $href .= "?" . join(';', @result) if scalar @result;
1376
1377         # final transformation: trailing spaces must be escaped (URI-encoded)
1378         $href =~ s/(\s+)$/CGI::escape($1)/e;
1379
1380         if ($params{-anchor}) {
1381                 $href .= "#".esc_param($params{-anchor});
1382         }
1383
1384         return $href;
1385 }
1386
1387
1388 ## ======================================================================
1389 ## validation, quoting/unquoting and escaping
1390
1391 sub validate_action {
1392         my $input = shift || return undef;
1393         return undef unless exists $actions{$input};
1394         return $input;
1395 }
1396
1397 sub validate_project {
1398         my $input = shift || return undef;
1399         if (!validate_pathname($input) ||
1400                 !(-d "$projectroot/$input") ||
1401                 !check_export_ok("$projectroot/$input") ||
1402                 ($strict_export && !project_in_list($input))) {
1403                 return undef;
1404         } else {
1405                 return $input;
1406         }
1407 }
1408
1409 sub validate_pathname {
1410         my $input = shift || return undef;
1411
1412         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1413         # at the beginning, at the end, and between slashes.
1414         # also this catches doubled slashes
1415         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1416                 return undef;
1417         }
1418         # no null characters
1419         if ($input =~ m!\0!) {
1420                 return undef;
1421         }
1422         return $input;
1423 }
1424
1425 sub validate_refname {
1426         my $input = shift || return undef;
1427
1428         # textual hashes are O.K.
1429         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1430                 return $input;
1431         }
1432         # it must be correct pathname
1433         $input = validate_pathname($input)
1434                 or return undef;
1435         # restrictions on ref name according to git-check-ref-format
1436         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1437                 return undef;
1438         }
1439         return $input;
1440 }
1441
1442 # decode sequences of octets in utf8 into Perl's internal form,
1443 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1444 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1445 sub to_utf8 {
1446         my $str = shift;
1447         return undef unless defined $str;
1448
1449         if (utf8::is_utf8($str) || utf8::decode($str)) {
1450                 return $str;
1451         } else {
1452                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1453         }
1454 }
1455
1456 # quote unsafe chars, but keep the slash, even when it's not
1457 # correct, but quoted slashes look too horrible in bookmarks
1458 sub esc_param {
1459         my $str = shift;
1460         return undef unless defined $str;
1461         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1462         $str =~ s/ /\+/g;
1463         return $str;
1464 }
1465
1466 # the quoting rules for path_info fragment are slightly different
1467 sub esc_path_info {
1468         my $str = shift;
1469         return undef unless defined $str;
1470
1471         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1472         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1473
1474         return $str;
1475 }
1476
1477 # quote unsafe chars in whole URL, so some characters cannot be quoted
1478 sub esc_url {
1479         my $str = shift;
1480         return undef unless defined $str;
1481         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1482         $str =~ s/ /\+/g;
1483         return $str;
1484 }
1485
1486 # quote unsafe characters in HTML attributes
1487 sub esc_attr {
1488
1489         # for XHTML conformance escaping '"' to '&quot;' is not enough
1490         return esc_html(@_);
1491 }
1492
1493 # replace invalid utf8 character with SUBSTITUTION sequence
1494 sub esc_html {
1495         my $str = shift;
1496         my %opts = @_;
1497
1498         return undef unless defined $str;
1499
1500         $str = to_utf8($str);
1501         $str = $cgi->escapeHTML($str);
1502         if ($opts{'-nbsp'}) {
1503                 $str =~ s/ /&nbsp;/g;
1504         }
1505         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1506         return $str;
1507 }
1508
1509 # quote control characters and escape filename to HTML
1510 sub esc_path {
1511         my $str = shift;
1512         my %opts = @_;
1513
1514         return undef unless defined $str;
1515
1516         $str = to_utf8($str);
1517         $str = $cgi->escapeHTML($str);
1518         if ($opts{'-nbsp'}) {
1519                 $str =~ s/ /&nbsp;/g;
1520         }
1521         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1522         return $str;
1523 }
1524
1525 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1526 sub sanitize {
1527         my $str = shift;
1528
1529         return undef unless defined $str;
1530
1531         $str = to_utf8($str);
1532         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1533         return $str;
1534 }
1535
1536 # Make control characters "printable", using character escape codes (CEC)
1537 sub quot_cec {
1538         my $cntrl = shift;
1539         my %opts = @_;
1540         my %es = ( # character escape codes, aka escape sequences
1541                 "\t" => '\t',   # tab            (HT)
1542                 "\n" => '\n',   # line feed      (LF)
1543                 "\r" => '\r',   # carrige return (CR)
1544                 "\f" => '\f',   # form feed      (FF)
1545                 "\b" => '\b',   # backspace      (BS)
1546                 "\a" => '\a',   # alarm (bell)   (BEL)
1547                 "\e" => '\e',   # escape         (ESC)
1548                 "\013" => '\v', # vertical tab   (VT)
1549                 "\000" => '\0', # nul character  (NUL)
1550         );
1551         my $chr = ( (exists $es{$cntrl})
1552                     ? $es{$cntrl}
1553                     : sprintf('\%2x', ord($cntrl)) );
1554         if ($opts{-nohtml}) {
1555                 return $chr;
1556         } else {
1557                 return "<span class=\"cntrl\">$chr</span>";
1558         }
1559 }
1560
1561 # Alternatively use unicode control pictures codepoints,
1562 # Unicode "printable representation" (PR)
1563 sub quot_upr {
1564         my $cntrl = shift;
1565         my %opts = @_;
1566
1567         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1568         if ($opts{-nohtml}) {
1569                 return $chr;
1570         } else {
1571                 return "<span class=\"cntrl\">$chr</span>";
1572         }
1573 }
1574
1575 # git may return quoted and escaped filenames
1576 sub unquote {
1577         my $str = shift;
1578
1579         sub unq {
1580                 my $seq = shift;
1581                 my %es = ( # character escape codes, aka escape sequences
1582                         't' => "\t",   # tab            (HT, TAB)
1583                         'n' => "\n",   # newline        (NL)
1584                         'r' => "\r",   # return         (CR)
1585                         'f' => "\f",   # form feed      (FF)
1586                         'b' => "\b",   # backspace      (BS)
1587                         'a' => "\a",   # alarm (bell)   (BEL)
1588                         'e' => "\e",   # escape         (ESC)
1589                         'v' => "\013", # vertical tab   (VT)
1590                 );
1591
1592                 if ($seq =~ m/^[0-7]{1,3}$/) {
1593                         # octal char sequence
1594                         return chr(oct($seq));
1595                 } elsif (exists $es{$seq}) {
1596                         # C escape sequence, aka character escape code
1597                         return $es{$seq};
1598                 }
1599                 # quoted ordinary character
1600                 return $seq;
1601         }
1602
1603         if ($str =~ m/^"(.*)"$/) {
1604                 # needs unquoting
1605                 $str = $1;
1606                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1607         }
1608         return $str;
1609 }
1610
1611 # escape tabs (convert tabs to spaces)
1612 sub untabify {
1613         my $line = shift;
1614
1615         while ((my $pos = index($line, "\t")) != -1) {
1616                 if (my $count = (8 - ($pos % 8))) {
1617                         my $spaces = ' ' x $count;
1618                         $line =~ s/\t/$spaces/;
1619                 }
1620         }
1621
1622         return $line;
1623 }
1624
1625 sub project_in_list {
1626         my $project = shift;
1627         my @list = git_get_projects_list();
1628         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1629 }
1630
1631 ## ----------------------------------------------------------------------
1632 ## HTML aware string manipulation
1633
1634 # Try to chop given string on a word boundary between position
1635 # $len and $len+$add_len. If there is no word boundary there,
1636 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1637 # (marking chopped part) would be longer than given string.
1638 sub chop_str {
1639         my $str = shift;
1640         my $len = shift;
1641         my $add_len = shift || 10;
1642         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1643
1644         # Make sure perl knows it is utf8 encoded so we don't
1645         # cut in the middle of a utf8 multibyte char.
1646         $str = to_utf8($str);
1647
1648         # allow only $len chars, but don't cut a word if it would fit in $add_len
1649         # if it doesn't fit, cut it if it's still longer than the dots we would add
1650         # remove chopped character entities entirely
1651
1652         # when chopping in the middle, distribute $len into left and right part
1653         # return early if chopping wouldn't make string shorter
1654         if ($where eq 'center') {
1655                 return $str if ($len + 5 >= length($str)); # filler is length 5
1656                 $len = int($len/2);
1657         } else {
1658                 return $str if ($len + 4 >= length($str)); # filler is length 4
1659         }
1660
1661         # regexps: ending and beginning with word part up to $add_len
1662         my $endre = qr/.{$len}\w{0,$add_len}/;
1663         my $begre = qr/\w{0,$add_len}.{$len}/;
1664
1665         if ($where eq 'left') {
1666                 $str =~ m/^(.*?)($begre)$/;
1667                 my ($lead, $body) = ($1, $2);
1668                 if (length($lead) > 4) {
1669                         $lead = " ...";
1670                 }
1671                 return "$lead$body";
1672
1673         } elsif ($where eq 'center') {
1674                 $str =~ m/^($endre)(.*)$/;
1675                 my ($left, $str)  = ($1, $2);
1676                 $str =~ m/^(.*?)($begre)$/;
1677                 my ($mid, $right) = ($1, $2);
1678                 if (length($mid) > 5) {
1679                         $mid = " ... ";
1680                 }
1681                 return "$left$mid$right";
1682
1683         } else {
1684                 $str =~ m/^($endre)(.*)$/;
1685                 my $body = $1;
1686                 my $tail = $2;
1687                 if (length($tail) > 4) {
1688                         $tail = "... ";
1689                 }
1690                 return "$body$tail";
1691         }
1692 }
1693
1694 # takes the same arguments as chop_str, but also wraps a <span> around the
1695 # result with a title attribute if it does get chopped. Additionally, the
1696 # string is HTML-escaped.
1697 sub chop_and_escape_str {
1698         my ($str) = @_;
1699
1700         my $chopped = chop_str(@_);
1701         $str = to_utf8($str);
1702         if ($chopped eq $str) {
1703                 return esc_html($chopped);
1704         } else {
1705                 $str =~ s/[[:cntrl:]]/?/g;
1706                 return $cgi->span({-title=>$str}, esc_html($chopped));
1707         }
1708 }
1709
1710 ## ----------------------------------------------------------------------
1711 ## functions returning short strings
1712
1713 # CSS class for given age value (in seconds)
1714 sub age_class {
1715         my $age = shift;
1716
1717         if (!defined $age) {
1718                 return "noage";
1719         } elsif ($age < 60*60*2) {
1720                 return "age0";
1721         } elsif ($age < 60*60*24*2) {
1722                 return "age1";
1723         } else {
1724                 return "age2";
1725         }
1726 }
1727
1728 # convert age in seconds to "nn units ago" string
1729 sub age_string {
1730         my $age = shift;
1731         my $age_str;
1732
1733         if ($age > 60*60*24*365*2) {
1734                 $age_str = (int $age/60/60/24/365);
1735                 $age_str .= " years ago";
1736         } elsif ($age > 60*60*24*(365/12)*2) {
1737                 $age_str = int $age/60/60/24/(365/12);
1738                 $age_str .= " months ago";
1739         } elsif ($age > 60*60*24*7*2) {
1740                 $age_str = int $age/60/60/24/7;
1741                 $age_str .= " weeks ago";
1742         } elsif ($age > 60*60*24*2) {
1743                 $age_str = int $age/60/60/24;
1744                 $age_str .= " days ago";
1745         } elsif ($age > 60*60*2) {
1746                 $age_str = int $age/60/60;
1747                 $age_str .= " hours ago";
1748         } elsif ($age > 60*2) {
1749                 $age_str = int $age/60;
1750                 $age_str .= " min ago";
1751         } elsif ($age > 2) {
1752                 $age_str = int $age;
1753                 $age_str .= " sec ago";
1754         } else {
1755                 $age_str .= " right now";
1756         }
1757         return $age_str;
1758 }
1759
1760 use constant {
1761         S_IFINVALID => 0030000,
1762         S_IFGITLINK => 0160000,
1763 };
1764
1765 # submodule/subproject, a commit object reference
1766 sub S_ISGITLINK {
1767         my $mode = shift;
1768
1769         return (($mode & S_IFMT) == S_IFGITLINK)
1770 }
1771
1772 # convert file mode in octal to symbolic file mode string
1773 sub mode_str {
1774         my $mode = oct shift;
1775
1776         if (S_ISGITLINK($mode)) {
1777                 return 'm---------';
1778         } elsif (S_ISDIR($mode & S_IFMT)) {
1779                 return 'drwxr-xr-x';
1780         } elsif (S_ISLNK($mode)) {
1781                 return 'lrwxrwxrwx';
1782         } elsif (S_ISREG($mode)) {
1783                 # git cares only about the executable bit
1784                 if ($mode & S_IXUSR) {
1785                         return '-rwxr-xr-x';
1786                 } else {
1787                         return '-rw-r--r--';
1788                 };
1789         } else {
1790                 return '----------';
1791         }
1792 }
1793
1794 # convert file mode in octal to file type string
1795 sub file_type {
1796         my $mode = shift;
1797
1798         if ($mode !~ m/^[0-7]+$/) {
1799                 return $mode;
1800         } else {
1801                 $mode = oct $mode;
1802         }
1803
1804         if (S_ISGITLINK($mode)) {
1805                 return "submodule";
1806         } elsif (S_ISDIR($mode & S_IFMT)) {
1807                 return "directory";
1808         } elsif (S_ISLNK($mode)) {
1809                 return "symlink";
1810         } elsif (S_ISREG($mode)) {
1811                 return "file";
1812         } else {
1813                 return "unknown";
1814         }
1815 }
1816
1817 # convert file mode in octal to file type description string
1818 sub file_type_long {
1819         my $mode = shift;
1820
1821         if ($mode !~ m/^[0-7]+$/) {
1822                 return $mode;
1823         } else {
1824                 $mode = oct $mode;
1825         }
1826
1827         if (S_ISGITLINK($mode)) {
1828                 return "submodule";
1829         } elsif (S_ISDIR($mode & S_IFMT)) {
1830                 return "directory";
1831         } elsif (S_ISLNK($mode)) {
1832                 return "symlink";
1833         } elsif (S_ISREG($mode)) {
1834                 if ($mode & S_IXUSR) {
1835                         return "executable";
1836                 } else {
1837                         return "file";
1838                 };
1839         } else {
1840                 return "unknown";
1841         }
1842 }
1843
1844
1845 ## ----------------------------------------------------------------------
1846 ## functions returning short HTML fragments, or transforming HTML fragments
1847 ## which don't belong to other sections
1848
1849 # format line of commit message.
1850 sub format_log_line_html {
1851         my $line = shift;
1852
1853         $line = esc_html($line, -nbsp=>1);
1854         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1855                 $cgi->a({-href => href(action=>"object", hash=>$1),
1856                                         -class => "text"}, $1);
1857         }eg;
1858
1859         return $line;
1860 }
1861
1862 # format marker of refs pointing to given object
1863
1864 # the destination action is chosen based on object type and current context:
1865 # - for annotated tags, we choose the tag view unless it's the current view
1866 #   already, in which case we go to shortlog view
1867 # - for other refs, we keep the current view if we're in history, shortlog or
1868 #   log view, and select shortlog otherwise
1869 sub format_ref_marker {
1870         my ($refs, $id) = @_;
1871         my $markers = '';
1872
1873         if (defined $refs->{$id}) {
1874                 foreach my $ref (@{$refs->{$id}}) {
1875                         # this code exploits the fact that non-lightweight tags are the
1876                         # only indirect objects, and that they are the only objects for which
1877                         # we want to use tag instead of shortlog as action
1878                         my ($type, $name) = qw();
1879                         my $indirect = ($ref =~ s/\^\{\}$//);
1880                         # e.g. tags/v2.6.11 or heads/next
1881                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1882                                 $type = $1;
1883                                 $name = $2;
1884                         } else {
1885                                 $type = "ref";
1886                                 $name = $ref;
1887                         }
1888
1889                         my $class = $type;
1890                         $class .= " indirect" if $indirect;
1891
1892                         my $dest_action = "shortlog";
1893
1894                         if ($indirect) {
1895                                 $dest_action = "tag" unless $action eq "tag";
1896                         } elsif ($action =~ /^(history|(short)?log)$/) {
1897                                 $dest_action = $action;
1898                         }
1899
1900                         my $dest = "";
1901                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1902                         $dest .= $ref;
1903
1904                         my $link = $cgi->a({
1905                                 -href => href(
1906                                         action=>$dest_action,
1907                                         hash=>$dest
1908                                 )}, $name);
1909
1910                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1911                                 $link . "</span>";
1912                 }
1913         }
1914
1915         if ($markers) {
1916                 return ' <span class="refs">'. $markers . '</span>';
1917         } else {
1918                 return "";
1919         }
1920 }
1921
1922 # format, perhaps shortened and with markers, title line
1923 sub format_subject_html {
1924         my ($long, $short, $href, $extra) = @_;
1925         $extra = '' unless defined($extra);
1926
1927         if (length($short) < length($long)) {
1928                 $long =~ s/[[:cntrl:]]/?/g;
1929                 return $cgi->a({-href => $href, -class => "list subject",
1930                                 -title => to_utf8($long)},
1931                        esc_html($short)) . $extra;
1932         } else {
1933                 return $cgi->a({-href => $href, -class => "list subject"},
1934                        esc_html($long)) . $extra;
1935         }
1936 }
1937
1938 # Rather than recomputing the url for an email multiple times, we cache it
1939 # after the first hit. This gives a visible benefit in views where the avatar
1940 # for the same email is used repeatedly (e.g. shortlog).
1941 # The cache is shared by all avatar engines (currently gravatar only), which
1942 # are free to use it as preferred. Since only one avatar engine is used for any
1943 # given page, there's no risk for cache conflicts.
1944 our %avatar_cache = ();
1945
1946 # Compute the picon url for a given email, by using the picon search service over at
1947 # http://www.cs.indiana.edu/picons/search.html
1948 sub picon_url {
1949         my $email = lc shift;
1950         if (!$avatar_cache{$email}) {
1951                 my ($user, $domain) = split('@', $email);
1952                 $avatar_cache{$email} =
1953                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1954                         "$domain/$user/" .
1955                         "users+domains+unknown/up/single";
1956         }
1957         return $avatar_cache{$email};
1958 }
1959
1960 # Compute the gravatar url for a given email, if it's not in the cache already.
1961 # Gravatar stores only the part of the URL before the size, since that's the
1962 # one computationally more expensive. This also allows reuse of the cache for
1963 # different sizes (for this particular engine).
1964 sub gravatar_url {
1965         my $email = lc shift;
1966         my $size = shift;
1967         $avatar_cache{$email} ||=
1968                 "http://www.gravatar.com/avatar/" .
1969                         Digest::MD5::md5_hex($email) . "?s=";
1970         return $avatar_cache{$email} . $size;
1971 }
1972
1973 # Insert an avatar for the given $email at the given $size if the feature
1974 # is enabled.
1975 sub git_get_avatar {
1976         my ($email, %opts) = @_;
1977         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1978         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1979         $opts{-size} ||= 'default';
1980         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1981         my $url = "";
1982         if ($git_avatar eq 'gravatar') {
1983                 $url = gravatar_url($email, $size);
1984         } elsif ($git_avatar eq 'picon') {
1985                 $url = picon_url($email);
1986         }
1987         # Other providers can be added by extending the if chain, defining $url
1988         # as needed. If no variant puts something in $url, we assume avatars
1989         # are completely disabled/unavailable.
1990         if ($url) {
1991                 return $pre_white .
1992                        "<img width=\"$size\" " .
1993                             "class=\"avatar\" " .
1994                             "src=\"".esc_url($url)."\" " .
1995                             "alt=\"\" " .
1996                        "/>" . $post_white;
1997         } else {
1998                 return "";
1999         }
2000 }
2001
2002 sub format_search_author {
2003         my ($author, $searchtype, $displaytext) = @_;
2004         my $have_search = gitweb_check_feature('search');
2005
2006         if ($have_search) {
2007                 my $performed = "";
2008                 if ($searchtype eq 'author') {
2009                         $performed = "authored";
2010                 } elsif ($searchtype eq 'committer') {
2011                         $performed = "committed";
2012                 }
2013
2014                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2015                                 searchtext=>$author,
2016                                 searchtype=>$searchtype), class=>"list",
2017                                 title=>"Search for commits $performed by $author"},
2018                                 $displaytext);
2019
2020         } else {
2021                 return $displaytext;
2022         }
2023 }
2024
2025 # format the author name of the given commit with the given tag
2026 # the author name is chopped and escaped according to the other
2027 # optional parameters (see chop_str).
2028 sub format_author_html {
2029         my $tag = shift;
2030         my $co = shift;
2031         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2032         return "<$tag class=\"author\">" .
2033                format_search_author($co->{'author_name'}, "author",
2034                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2035                        $author) .
2036                "</$tag>";
2037 }
2038
2039 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2040 sub format_git_diff_header_line {
2041         my $line = shift;
2042         my $diffinfo = shift;
2043         my ($from, $to) = @_;
2044
2045         if ($diffinfo->{'nparents'}) {
2046                 # combined diff
2047                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2048                 if ($to->{'href'}) {
2049                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2050                                          esc_path($to->{'file'}));
2051                 } else { # file was deleted (no href)
2052                         $line .= esc_path($to->{'file'});
2053                 }
2054         } else {
2055                 # "ordinary" diff
2056                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2057                 if ($from->{'href'}) {
2058                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2059                                          'a/' . esc_path($from->{'file'}));
2060                 } else { # file was added (no href)
2061                         $line .= 'a/' . esc_path($from->{'file'});
2062                 }
2063                 $line .= ' ';
2064                 if ($to->{'href'}) {
2065                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2066                                          'b/' . esc_path($to->{'file'}));
2067                 } else { # file was deleted
2068                         $line .= 'b/' . esc_path($to->{'file'});
2069                 }
2070         }
2071
2072         return "<div class=\"diff header\">$line</div>\n";
2073 }
2074
2075 # format extended diff header line, before patch itself
2076 sub format_extended_diff_header_line {
2077         my $line = shift;
2078         my $diffinfo = shift;
2079         my ($from, $to) = @_;
2080
2081         # match <path>
2082         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2083                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2084                                        esc_path($from->{'file'}));
2085         }
2086         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2087                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2088                                  esc_path($to->{'file'}));
2089         }
2090         # match single <mode>
2091         if ($line =~ m/\s(\d{6})$/) {
2092                 $line .= '<span class="info"> (' .
2093                          file_type_long($1) .
2094                          ')</span>';
2095         }
2096         # match <hash>
2097         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2098                 # can match only for combined diff
2099                 $line = 'index ';
2100                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2101                         if ($from->{'href'}[$i]) {
2102                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2103                                                   -class=>"hash"},
2104                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2105                         } else {
2106                                 $line .= '0' x 7;
2107                         }
2108                         # separator
2109                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2110                 }
2111                 $line .= '..';
2112                 if ($to->{'href'}) {
2113                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2114                                          substr($diffinfo->{'to_id'},0,7));
2115                 } else {
2116                         $line .= '0' x 7;
2117                 }
2118
2119         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2120                 # can match only for ordinary diff
2121                 my ($from_link, $to_link);
2122                 if ($from->{'href'}) {
2123                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2124                                              substr($diffinfo->{'from_id'},0,7));
2125                 } else {
2126                         $from_link = '0' x 7;
2127                 }
2128                 if ($to->{'href'}) {
2129                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2130                                            substr($diffinfo->{'to_id'},0,7));
2131                 } else {
2132                         $to_link = '0' x 7;
2133                 }
2134                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2135                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2136         }
2137
2138         return $line . "<br/>\n";
2139 }
2140
2141 # format from-file/to-file diff header
2142 sub format_diff_from_to_header {
2143         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2144         my $line;
2145         my $result = '';
2146
2147         $line = $from_line;
2148         #assert($line =~ m/^---/) if DEBUG;
2149         # no extra formatting for "^--- /dev/null"
2150         if (! $diffinfo->{'nparents'}) {
2151                 # ordinary (single parent) diff
2152                 if ($line =~ m!^--- "?a/!) {
2153                         if ($from->{'href'}) {
2154                                 $line = '--- a/' .
2155                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2156                                                 esc_path($from->{'file'}));
2157                         } else {
2158                                 $line = '--- a/' .
2159                                         esc_path($from->{'file'});
2160                         }
2161                 }
2162                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2163
2164         } else {
2165                 # combined diff (merge commit)
2166                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2167                         if ($from->{'href'}[$i]) {
2168                                 $line = '--- ' .
2169                                         $cgi->a({-href=>href(action=>"blobdiff",
2170                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2171                                                              hash_parent_base=>$parents[$i],
2172                                                              file_parent=>$from->{'file'}[$i],
2173                                                              hash=>$diffinfo->{'to_id'},
2174                                                              hash_base=>$hash,
2175                                                              file_name=>$to->{'file'}),
2176                                                  -class=>"path",
2177                                                  -title=>"diff" . ($i+1)},
2178                                                 $i+1) .
2179                                         '/' .
2180                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2181                                                 esc_path($from->{'file'}[$i]));
2182                         } else {
2183                                 $line = '--- /dev/null';
2184                         }
2185                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2186                 }
2187         }
2188
2189         $line = $to_line;
2190         #assert($line =~ m/^\+\+\+/) if DEBUG;
2191         # no extra formatting for "^+++ /dev/null"
2192         if ($line =~ m!^\+\+\+ "?b/!) {
2193                 if ($to->{'href'}) {
2194                         $line = '+++ b/' .
2195                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2196                                         esc_path($to->{'file'}));
2197                 } else {
2198                         $line = '+++ b/' .
2199                                 esc_path($to->{'file'});
2200                 }
2201         }
2202         $result .= qq!<div class="diff to_file">$line</div>\n!;
2203
2204         return $result;
2205 }
2206
2207 # create note for patch simplified by combined diff
2208 sub format_diff_cc_simplified {
2209         my ($diffinfo, @parents) = @_;
2210         my $result = '';
2211
2212         $result .= "<div class=\"diff header\">" .
2213                    "diff --cc ";
2214         if (!is_deleted($diffinfo)) {
2215                 $result .= $cgi->a({-href => href(action=>"blob",
2216                                                   hash_base=>$hash,
2217                                                   hash=>$diffinfo->{'to_id'},
2218                                                   file_name=>$diffinfo->{'to_file'}),
2219                                     -class => "path"},
2220                                    esc_path($diffinfo->{'to_file'}));
2221         } else {
2222                 $result .= esc_path($diffinfo->{'to_file'});
2223         }
2224         $result .= "</div>\n" . # class="diff header"
2225                    "<div class=\"diff nodifferences\">" .
2226                    "Simple merge" .
2227                    "</div>\n"; # class="diff nodifferences"
2228
2229         return $result;
2230 }
2231
2232 sub diff_line_class {
2233         my ($line, $from, $to) = @_;
2234
2235         # ordinary diff
2236         my $num_sign = 1;
2237         # combined diff
2238         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2239                 $num_sign = scalar @{$from->{'href'}};
2240         }
2241
2242         my @diff_line_classifier = (
2243                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2244                 { regexp => qr/^\\/,               class => "incomplete"  },
2245                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2246                 # classifier for context must come before classifier add/rem,
2247                 # or we would have to use more complicated regexp, for example
2248                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2249                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2250                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2251         );
2252         for my $clsfy (@diff_line_classifier) {
2253                 return $clsfy->{'class'}
2254                         if ($line =~ $clsfy->{'regexp'});
2255         }
2256
2257         # fallback
2258         return "";
2259 }
2260
2261 # assumes that $from and $to are defined and correctly filled,
2262 # and that $line holds a line of chunk header for unified diff
2263 sub format_unidiff_chunk_header {
2264         my ($line, $from, $to) = @_;
2265
2266         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2267                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2268
2269         $from_lines = 0 unless defined $from_lines;
2270         $to_lines   = 0 unless defined $to_lines;
2271
2272         if ($from->{'href'}) {
2273                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2274                                      -class=>"list"}, $from_text);
2275         }
2276         if ($to->{'href'}) {
2277                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2278                                      -class=>"list"}, $to_text);
2279         }
2280         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2281                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2282         return $line;
2283 }
2284
2285 # assumes that $from and $to are defined and correctly filled,
2286 # and that $line holds a line of chunk header for combined diff
2287 sub format_cc_diff_chunk_header {
2288         my ($line, $from, $to) = @_;
2289
2290         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2291         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2292
2293         @from_text = split(' ', $ranges);
2294         for (my $i = 0; $i < @from_text; ++$i) {
2295                 ($from_start[$i], $from_nlines[$i]) =
2296                         (split(',', substr($from_text[$i], 1)), 0);
2297         }
2298
2299         $to_text   = pop @from_text;
2300         $to_start  = pop @from_start;
2301         $to_nlines = pop @from_nlines;
2302
2303         $line = "<span class=\"chunk_info\">$prefix ";
2304         for (my $i = 0; $i < @from_text; ++$i) {
2305                 if ($from->{'href'}[$i]) {
2306                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2307                                           -class=>"list"}, $from_text[$i]);
2308                 } else {
2309                         $line .= $from_text[$i];
2310                 }
2311                 $line .= " ";
2312         }
2313         if ($to->{'href'}) {
2314                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2315                                   -class=>"list"}, $to_text);
2316         } else {
2317                 $line .= $to_text;
2318         }
2319         $line .= " $prefix</span>" .
2320                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2321         return $line;
2322 }
2323
2324 # process patch (diff) line (not to be used for diff headers),
2325 # returning class and HTML-formatted (but not wrapped) line
2326 sub process_diff_line {
2327         my $line = shift;
2328         my ($from, $to) = @_;
2329
2330         my $diff_class = diff_line_class($line, $from, $to);
2331
2332         chomp $line;
2333         $line = untabify($line);
2334
2335         if ($from && $to && $line =~ m/^\@{2} /) {
2336                 $line = format_unidiff_chunk_header($line, $from, $to);
2337                 return $diff_class, $line;
2338
2339         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2340                 $line = format_cc_diff_chunk_header($line, $from, $to);
2341                 return $diff_class, $line;
2342
2343         }
2344         return $diff_class, esc_html($line, -nbsp=>1);
2345 }
2346
2347 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2348 # linked.  Pass the hash of the tree/commit to snapshot.
2349 sub format_snapshot_links {
2350         my ($hash) = @_;
2351         my $num_fmts = @snapshot_fmts;
2352         if ($num_fmts > 1) {
2353                 # A parenthesized list of links bearing format names.
2354                 # e.g. "snapshot (_tar.gz_ _zip_)"
2355                 return "snapshot (" . join(' ', map
2356                         $cgi->a({
2357                                 -href => href(
2358                                         action=>"snapshot",
2359                                         hash=>$hash,
2360                                         snapshot_format=>$_
2361                                 )
2362                         }, $known_snapshot_formats{$_}{'display'})
2363                 , @snapshot_fmts) . ")";
2364         } elsif ($num_fmts == 1) {
2365                 # A single "snapshot" link whose tooltip bears the format name.
2366                 # i.e. "_snapshot_"
2367                 my ($fmt) = @snapshot_fmts;
2368                 return
2369                         $cgi->a({
2370                                 -href => href(
2371                                         action=>"snapshot",
2372                                         hash=>$hash,
2373                                         snapshot_format=>$fmt
2374                                 ),
2375                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2376                         }, "snapshot");
2377         } else { # $num_fmts == 0
2378                 return undef;
2379         }
2380 }
2381
2382 ## ......................................................................
2383 ## functions returning values to be passed, perhaps after some
2384 ## transformation, to other functions; e.g. returning arguments to href()
2385
2386 # returns hash to be passed to href to generate gitweb URL
2387 # in -title key it returns description of link
2388 sub get_feed_info {
2389         my $format = shift || 'Atom';
2390         my %res = (action => lc($format));
2391
2392         # feed links are possible only for project views
2393         return unless (defined $project);
2394         # some views should link to OPML, or to generic project feed,
2395         # or don't have specific feed yet (so they should use generic)
2396         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2397
2398         my $branch;
2399         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2400         # from tag links; this also makes possible to detect branch links
2401         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2402             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2403                 $branch = $1;
2404         }
2405         # find log type for feed description (title)
2406         my $type = 'log';
2407         if (defined $file_name) {
2408                 $type  = "history of $file_name";
2409                 $type .= "/" if ($action eq 'tree');
2410                 $type .= " on '$branch'" if (defined $branch);
2411         } else {
2412                 $type = "log of $branch" if (defined $branch);
2413         }
2414
2415         $res{-title} = $type;
2416         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2417         $res{'file_name'} = $file_name;
2418
2419         return %res;
2420 }
2421
2422 ## ----------------------------------------------------------------------
2423 ## git utility subroutines, invoking git commands
2424
2425 # returns path to the core git executable and the --git-dir parameter as list
2426 sub git_cmd {
2427         $number_of_git_cmds++;
2428         return $GIT, '--git-dir='.$git_dir;
2429 }
2430
2431 # quote the given arguments for passing them to the shell
2432 # quote_command("command", "arg 1", "arg with ' and ! characters")
2433 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2434 # Try to avoid using this function wherever possible.
2435 sub quote_command {
2436         return join(' ',
2437                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2438 }
2439
2440 # get HEAD ref of given project as hash
2441 sub git_get_head_hash {
2442         return git_get_full_hash(shift, 'HEAD');
2443 }
2444
2445 sub git_get_full_hash {
2446         return git_get_hash(@_);
2447 }
2448
2449 sub git_get_short_hash {
2450         return git_get_hash(@_, '--short=7');
2451 }
2452
2453 sub git_get_hash {
2454         my ($project, $hash, @options) = @_;
2455         my $o_git_dir = $git_dir;
2456         my $retval = undef;
2457         $git_dir = "$projectroot/$project";
2458         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2459             '--verify', '-q', @options, $hash) {
2460                 $retval = <$fd>;
2461                 chomp $retval if defined $retval;
2462                 close $fd;
2463         }
2464         if (defined $o_git_dir) {
2465                 $git_dir = $o_git_dir;
2466         }
2467         return $retval;
2468 }
2469
2470 # get type of given object
2471 sub git_get_type {
2472         my $hash = shift;
2473
2474         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2475         my $type = <$fd>;
2476         close $fd or return;
2477         chomp $type;
2478         return $type;
2479 }
2480
2481 # repository configuration
2482 our $config_file = '';
2483 our %config;
2484
2485 # store multiple values for single key as anonymous array reference
2486 # single values stored directly in the hash, not as [ <value> ]
2487 sub hash_set_multi {
2488         my ($hash, $key, $value) = @_;
2489
2490         if (!exists $hash->{$key}) {
2491                 $hash->{$key} = $value;
2492         } elsif (!ref $hash->{$key}) {
2493                 $hash->{$key} = [ $hash->{$key}, $value ];
2494         } else {
2495                 push @{$hash->{$key}}, $value;
2496         }
2497 }
2498
2499 # return hash of git project configuration
2500 # optionally limited to some section, e.g. 'gitweb'
2501 sub git_parse_project_config {
2502         my $section_regexp = shift;
2503         my %config;
2504
2505         local $/ = "\0";
2506
2507         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2508                 or return;
2509
2510         while (my $keyval = <$fh>) {
2511                 chomp $keyval;
2512                 my ($key, $value) = split(/\n/, $keyval, 2);
2513
2514                 hash_set_multi(\%config, $key, $value)
2515                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2516         }
2517         close $fh;
2518
2519         return %config;
2520 }
2521
2522 # convert config value to boolean: 'true' or 'false'
2523 # no value, number > 0, 'true' and 'yes' values are true
2524 # rest of values are treated as false (never as error)
2525 sub config_to_bool {
2526         my $val = shift;
2527
2528         return 1 if !defined $val;             # section.key
2529
2530         # strip leading and trailing whitespace
2531         $val =~ s/^\s+//;
2532         $val =~ s/\s+$//;
2533
2534         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2535                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2536 }
2537
2538 # convert config value to simple decimal number
2539 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2540 # to be multiplied by 1024, 1048576, or 1073741824
2541 sub config_to_int {
2542         my $val = shift;
2543
2544         # strip leading and trailing whitespace
2545         $val =~ s/^\s+//;
2546         $val =~ s/\s+$//;
2547
2548         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2549                 $unit = lc($unit);
2550                 # unknown unit is treated as 1
2551                 return $num * ($unit eq 'g' ? 1073741824 :
2552                                $unit eq 'm' ?    1048576 :
2553                                $unit eq 'k' ?       1024 : 1);
2554         }
2555         return $val;
2556 }
2557
2558 # convert config value to array reference, if needed
2559 sub config_to_multi {
2560         my $val = shift;
2561
2562         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2563 }
2564
2565 sub git_get_project_config {
2566         my ($key, $type) = @_;
2567
2568         return unless defined $git_dir;
2569
2570         # key sanity check
2571         return unless ($key);
2572         # only subsection, if exists, is case sensitive,
2573         # and not lowercased by 'git config -z -l'
2574         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2575                 $key = join(".", lc($hi), $mi, lc($lo));
2576         } else {
2577                 $key = lc($key);
2578         }
2579         $key =~ s/^gitweb\.//;
2580         return if ($key =~ m/\W/);
2581
2582         # type sanity check
2583         if (defined $type) {
2584                 $type =~ s/^--//;
2585                 $type = undef
2586                         unless ($type eq 'bool' || $type eq 'int');
2587         }
2588
2589         # get config
2590         if (!defined $config_file ||
2591             $config_file ne "$git_dir/config") {
2592                 %config = git_parse_project_config('gitweb');
2593                 $config_file = "$git_dir/config";
2594         }
2595
2596         # check if config variable (key) exists
2597         return unless exists $config{"gitweb.$key"};
2598
2599         # ensure given type
2600         if (!defined $type) {
2601                 return $config{"gitweb.$key"};
2602         } elsif ($type eq 'bool') {
2603                 # backward compatibility: 'git config --bool' returns true/false
2604                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2605         } elsif ($type eq 'int') {
2606                 return config_to_int($config{"gitweb.$key"});
2607         }
2608         return $config{"gitweb.$key"};
2609 }
2610
2611 # get hash of given path at given ref
2612 sub git_get_hash_by_path {
2613         my $base = shift;
2614         my $path = shift || return undef;
2615         my $type = shift;
2616
2617         $path =~ s,/+$,,;
2618
2619         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2620                 or die_error(500, "Open git-ls-tree failed");
2621         my $line = <$fd>;
2622         close $fd or return undef;
2623
2624         if (!defined $line) {
2625                 # there is no tree or hash given by $path at $base
2626                 return undef;
2627         }
2628
2629         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2630         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2631         if (defined $type && $type ne $2) {
2632                 # type doesn't match
2633                 return undef;
2634         }
2635         return $3;
2636 }
2637
2638 # get path of entry with given hash at given tree-ish (ref)
2639 # used to get 'from' filename for combined diff (merge commit) for renames
2640 sub git_get_path_by_hash {
2641         my $base = shift || return;
2642         my $hash = shift || return;
2643
2644         local $/ = "\0";
2645
2646         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2647                 or return undef;
2648         while (my $line = <$fd>) {
2649                 chomp $line;
2650
2651                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2652                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2653                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2654                         close $fd;
2655                         return $1;
2656                 }
2657         }
2658         close $fd;
2659         return undef;
2660 }
2661
2662 ## ......................................................................
2663 ## git utility functions, directly accessing git repository
2664
2665 # get the value of config variable either from file named as the variable
2666 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2667 # configuration variable in the repository config file.
2668 sub git_get_file_or_project_config {
2669         my ($path, $name) = @_;
2670
2671         $git_dir = "$projectroot/$path";
2672         open my $fd, '<', "$git_dir/$name"
2673                 or return git_get_project_config($name);
2674         my $conf = <$fd>;
2675         close $fd;
2676         if (defined $conf) {
2677                 chomp $conf;
2678         }
2679         return $conf;
2680 }
2681
2682 sub git_get_project_description {
2683         my $path = shift;
2684         return git_get_file_or_project_config($path, 'description');
2685 }
2686
2687 sub git_get_project_category {
2688         my $path = shift;
2689         return git_get_file_or_project_config($path, 'category');
2690 }
2691
2692
2693 # supported formats:
2694 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2695 #   - if its contents is a number, use it as tag weight,
2696 #   - otherwise add a tag with weight 1
2697 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2698 #   the same value multiple times increases tag weight
2699 # * `gitweb.ctag' multi-valued repo config variable
2700 sub git_get_project_ctags {
2701         my $project = shift;
2702         my $ctags = {};
2703
2704         $git_dir = "$projectroot/$project";
2705         if (opendir my $dh, "$git_dir/ctags") {
2706                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2707                 foreach my $tagfile (@files) {
2708                         open my $ct, '<', $tagfile
2709                                 or next;
2710                         my $val = <$ct>;
2711                         chomp $val if $val;
2712                         close $ct;
2713
2714                         (my $ctag = $tagfile) =~ s#.*/##;
2715                         if ($val =~ /^\d+$/) {
2716                                 $ctags->{$ctag} = $val;
2717                         } else {
2718                                 $ctags->{$ctag} = 1;
2719                         }
2720                 }
2721                 closedir $dh;
2722
2723         } elsif (open my $fh, '<', "$git_dir/ctags") {
2724                 while (my $line = <$fh>) {
2725                         chomp $line;
2726                         $ctags->{$line}++ if $line;
2727                 }
2728                 close $fh;
2729
2730         } else {
2731                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2732                 foreach my $tag (@$taglist) {
2733                         $ctags->{$tag}++;
2734                 }
2735         }
2736
2737         return $ctags;
2738 }
2739
2740 # return hash, where keys are content tags ('ctags'),
2741 # and values are sum of weights of given tag in every project
2742 sub git_gather_all_ctags {
2743         my $projects = shift;
2744         my $ctags = {};
2745
2746         foreach my $p (@$projects) {
2747                 foreach my $ct (keys %{$p->{'ctags'}}) {
2748                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2749                 }
2750         }
2751
2752         return $ctags;
2753 }
2754
2755 sub git_populate_project_tagcloud {
2756         my $ctags = shift;
2757
2758         # First, merge different-cased tags; tags vote on casing
2759         my %ctags_lc;
2760         foreach (keys %$ctags) {
2761                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2762                 if (not $ctags_lc{lc $_}->{topcount}
2763                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2764                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2765                         $ctags_lc{lc $_}->{topname} = $_;
2766                 }
2767         }
2768
2769         my $cloud;
2770         my $matched = $cgi->param('by_tag');
2771         if (eval { require HTML::TagCloud; 1; }) {
2772                 $cloud = HTML::TagCloud->new;
2773                 foreach my $ctag (sort keys %ctags_lc) {
2774                         # Pad the title with spaces so that the cloud looks
2775                         # less crammed.
2776                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2777                         $title =~ s/ /&nbsp;/g;
2778                         $title =~ s/^/&nbsp;/g;
2779                         $title =~ s/$/&nbsp;/g;
2780                         if (defined $matched && $matched eq $ctag) {
2781                                 $title = qq(<span class="match">$title</span>);
2782                         }
2783                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2784                                     $ctags_lc{$ctag}->{count});
2785                 }
2786         } else {
2787                 $cloud = {};
2788                 foreach my $ctag (keys %ctags_lc) {
2789                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2790                         if (defined $matched && $matched eq $ctag) {
2791                                 $title = qq(<span class="match">$title</span>);
2792                         }
2793                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2794                         $cloud->{$ctag}{ctag} =
2795                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2796                 }
2797         }
2798         return $cloud;
2799 }
2800
2801 sub git_show_project_tagcloud {
2802         my ($cloud, $count) = @_;
2803         if (ref $cloud eq 'HTML::TagCloud') {
2804                 return $cloud->html_and_css($count);
2805         } else {
2806                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2807                 return
2808                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2809                         join (', ', map {
2810                                 $cloud->{$_}->{'ctag'}
2811                         } splice(@tags, 0, $count)) .
2812                         '</div>';
2813         }
2814 }
2815
2816 sub git_get_project_url_list {
2817         my $path = shift;
2818
2819         $git_dir = "$projectroot/$path";
2820         open my $fd, '<', "$git_dir/cloneurl"
2821                 or return wantarray ?
2822                 @{ config_to_multi(git_get_project_config('url')) } :
2823                    config_to_multi(git_get_project_config('url'));
2824         my @git_project_url_list = map { chomp; $_ } <$fd>;
2825         close $fd;
2826
2827         return wantarray ? @git_project_url_list : \@git_project_url_list;
2828 }
2829
2830 sub git_get_projects_list {
2831         my $filter = shift || '';
2832         my @list;
2833
2834         $filter =~ s/\.git$//;
2835
2836         if (-d $projects_list) {
2837                 # search in directory
2838                 my $dir = $projects_list;
2839                 # remove the trailing "/"
2840                 $dir =~ s!/+$!!;
2841                 my $pfxlen = length("$dir");
2842                 my $pfxdepth = ($dir =~ tr!/!!);
2843                 # when filtering, search only given subdirectory
2844                 if ($filter) {
2845                         $dir .= "/$filter";
2846                         $dir =~ s!/+$!!;
2847                 }
2848
2849                 File::Find::find({
2850                         follow_fast => 1, # follow symbolic links
2851                         follow_skip => 2, # ignore duplicates
2852                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2853                         wanted => sub {
2854                                 # global variables
2855                                 our $project_maxdepth;
2856                                 our $projectroot;
2857                                 # skip project-list toplevel, if we get it.
2858                                 return if (m!^[/.]$!);
2859                                 # only directories can be git repositories
2860                                 return unless (-d $_);
2861                                 # don't traverse too deep (Find is super slow on os x)
2862                                 # $project_maxdepth excludes depth of $projectroot
2863                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2864                                         $File::Find::prune = 1;
2865                                         return;
2866                                 }
2867
2868                                 my $path = substr($File::Find::name, $pfxlen + 1);
2869                                 # we check related file in $projectroot
2870                                 if (check_export_ok("$projectroot/$path")) {
2871                                         push @list, { path => $path };
2872                                         $File::Find::prune = 1;
2873                                 }
2874                         },
2875                 }, "$dir");
2876
2877         } elsif (-f $projects_list) {
2878                 # read from file(url-encoded):
2879                 # 'git%2Fgit.git Linus+Torvalds'
2880                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2881                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2882                 open my $fd, '<', $projects_list or return;
2883         PROJECT:
2884                 while (my $line = <$fd>) {
2885                         chomp $line;
2886                         my ($path, $owner) = split ' ', $line;
2887                         $path = unescape($path);
2888                         $owner = unescape($owner);
2889                         if (!defined $path) {
2890                                 next;
2891                         }
2892                         # if $filter is rpovided, check if $path begins with $filter
2893                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2894                                 next;
2895                         }
2896                         if (check_export_ok("$projectroot/$path")) {
2897                                 my $pr = {
2898                                         path => $path,
2899                                         owner => to_utf8($owner),
2900                                 };
2901                                 push @list, $pr;
2902                         }
2903                 }
2904                 close $fd;
2905         }
2906         return @list;
2907 }
2908
2909 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2910 # as side effects it sets 'forks' field to list of forks for forked projects
2911 sub filter_forks_from_projects_list {
2912         my $projects = shift;
2913
2914         my %trie; # prefix tree of directories (path components)
2915         # generate trie out of those directories that might contain forks
2916         foreach my $pr (@$projects) {
2917                 my $path = $pr->{'path'};
2918                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2919                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2920                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2921                 next unless (-d "$projectroot/$path"); # containing directory exists
2922                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2923
2924                 # add to trie
2925                 my @dirs = split('/', $path);
2926                 # walk the trie, until either runs out of components or out of trie
2927                 my $ref = \%trie;
2928                 while (scalar @dirs &&
2929                        exists($ref->{$dirs[0]})) {
2930                         $ref = $ref->{shift @dirs};
2931                 }
2932                 # create rest of trie structure from rest of components
2933                 foreach my $dir (@dirs) {
2934                         $ref = $ref->{$dir} = {};
2935                 }
2936                 # create end marker, store $pr as a data
2937                 $ref->{''} = $pr if (!exists $ref->{''});
2938         }
2939
2940         # filter out forks, by finding shortest prefix match for paths
2941         my @filtered;
2942  PROJECT:
2943         foreach my $pr (@$projects) {
2944                 # trie lookup
2945                 my $ref = \%trie;
2946         DIR:
2947                 foreach my $dir (split('/', $pr->{'path'})) {
2948                         if (exists $ref->{''}) {
2949                                 # found [shortest] prefix, is a fork - skip it
2950                                 push @{$ref->{''}{'forks'}}, $pr;
2951                                 next PROJECT;
2952                         }
2953                         if (!exists $ref->{$dir}) {
2954                                 # not in trie, cannot have prefix, not a fork
2955                                 push @filtered, $pr;
2956                                 next PROJECT;
2957                         }
2958                         # If the dir is there, we just walk one step down the trie.
2959                         $ref = $ref->{$dir};
2960                 }
2961                 # we ran out of trie
2962                 # (shouldn't happen: it's either no match, or end marker)
2963                 push @filtered, $pr;
2964         }
2965
2966         return @filtered;
2967 }
2968
2969 # note: fill_project_list_info must be run first,
2970 # for 'descr_long' and 'ctags' to be filled
2971 sub search_projects_list {
2972         my ($projlist, %opts) = @_;
2973         my $tagfilter  = $opts{'tagfilter'};
2974         my $searchtext = $opts{'searchtext'};
2975
2976         return @$projlist
2977                 unless ($tagfilter || $searchtext);
2978
2979         my @projects;
2980  PROJECT:
2981         foreach my $pr (@$projlist) {
2982
2983                 if ($tagfilter) {
2984                         next unless ref($pr->{'ctags'}) eq 'HASH';
2985                         next unless
2986                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2987                 }
2988
2989                 if ($searchtext) {
2990                         next unless
2991                                 $pr->{'path'} =~ /$searchtext/ ||
2992                                 $pr->{'descr_long'} =~ /$searchtext/;
2993                 }
2994
2995                 push @projects, $pr;
2996         }
2997
2998         return @projects;
2999 }
3000
3001 our $gitweb_project_owner = undef;
3002 sub git_get_project_list_from_file {
3003
3004         return if (defined $gitweb_project_owner);
3005
3006         $gitweb_project_owner = {};
3007         # read from file (url-encoded):
3008         # 'git%2Fgit.git Linus+Torvalds'
3009         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3010         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3011         if (-f $projects_list) {
3012                 open(my $fd, '<', $projects_list);
3013                 while (my $line = <$fd>) {
3014                         chomp $line;
3015                         my ($pr, $ow) = split ' ', $line;
3016                         $pr = unescape($pr);
3017                         $ow = unescape($ow);
3018                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3019                 }
3020                 close $fd;
3021         }
3022 }
3023
3024 sub git_get_project_owner {
3025         my $project = shift;
3026         my $owner;
3027
3028         return undef unless $project;
3029         $git_dir = "$projectroot/$project";
3030
3031         if (!defined $gitweb_project_owner) {
3032                 git_get_project_list_from_file();
3033         }
3034
3035         if (exists $gitweb_project_owner->{$project}) {
3036                 $owner = $gitweb_project_owner->{$project};
3037         }
3038         if (!defined $owner){
3039                 $owner = git_get_project_config('owner');
3040         }
3041         if (!defined $owner) {
3042                 $owner = get_file_owner("$git_dir");
3043         }
3044
3045         return $owner;
3046 }
3047
3048 sub git_get_last_activity {
3049         my ($path) = @_;
3050         my $fd;
3051
3052         $git_dir = "$projectroot/$path";
3053         open($fd, "-|", git_cmd(), 'for-each-ref',
3054              '--format=%(committer)',
3055              '--sort=-committerdate',
3056              '--count=1',
3057              'refs/heads') or return;
3058         my $most_recent = <$fd>;
3059         close $fd or return;
3060         if (defined $most_recent &&
3061             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3062                 my $timestamp = $1;
3063                 my $age = time - $timestamp;
3064                 return ($age, age_string($age));
3065         }
3066         return (undef, undef);
3067 }
3068
3069 # Implementation note: when a single remote is wanted, we cannot use 'git
3070 # remote show -n' because that command always work (assuming it's a remote URL
3071 # if it's not defined), and we cannot use 'git remote show' because that would
3072 # try to make a network roundtrip. So the only way to find if that particular
3073 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3074 # and when we find what we want.
3075 sub git_get_remotes_list {
3076         my $wanted = shift;
3077         my %remotes = ();
3078
3079         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3080         return unless $fd;
3081         while (my $remote = <$fd>) {
3082                 chomp $remote;
3083                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3084                 next if $wanted and not $remote eq $wanted;
3085                 my ($url, $key) = ($1, $2);
3086
3087                 $remotes{$remote} ||= { 'heads' => () };
3088                 $remotes{$remote}{$key} = $url;
3089         }
3090         close $fd or return;
3091         return wantarray ? %remotes : \%remotes;
3092 }
3093
3094 # Takes a hash of remotes as first parameter and fills it by adding the
3095 # available remote heads for each of the indicated remotes.
3096 sub fill_remote_heads {
3097         my $remotes = shift;
3098         my @heads = map { "remotes/$_" } keys %$remotes;
3099         my @remoteheads = git_get_heads_list(undef, @heads);
3100         foreach my $remote (keys %$remotes) {
3101                 $remotes->{$remote}{'heads'} = [ grep {
3102                         $_->{'name'} =~ s!^$remote/!!
3103                         } @remoteheads ];
3104         }
3105 }
3106
3107 sub git_get_references {
3108         my $type = shift || "";
3109         my %refs;
3110         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3111         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3112         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3113                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3114                 or return;
3115
3116         while (my $line = <$fd>) {
3117                 chomp $line;
3118                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3119                         if (defined $refs{$1}) {
3120                                 push @{$refs{$1}}, $2;
3121                         } else {
3122                                 $refs{$1} = [ $2 ];
3123                         }
3124                 }
3125         }
3126         close $fd or return;
3127         return \%refs;
3128 }
3129
3130 sub git_get_rev_name_tags {
3131         my $hash = shift || return undef;
3132
3133         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3134                 or return;
3135         my $name_rev = <$fd>;
3136         close $fd;
3137
3138         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3139                 return $1;
3140         } else {
3141                 # catches also '$hash undefined' output
3142                 return undef;
3143         }
3144 }
3145
3146 ## ----------------------------------------------------------------------
3147 ## parse to hash functions
3148
3149 sub parse_date {
3150         my $epoch = shift;
3151         my $tz = shift || "-0000";
3152
3153         my %date;
3154         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3155         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3156         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3157         $date{'hour'} = $hour;
3158         $date{'minute'} = $min;
3159         $date{'mday'} = $mday;
3160         $date{'day'} = $days[$wday];
3161         $date{'month'} = $months[$mon];
3162         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3163                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3164         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3165                              $mday, $months[$mon], $hour ,$min;
3166         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3167                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3168
3169         my ($tz_sign, $tz_hour, $tz_min) =
3170                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3171         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3172         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3173         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3174         $date{'hour_local'} = $hour;
3175         $date{'minute_local'} = $min;
3176         $date{'tz_local'} = $tz;
3177         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3178                                   1900+$year, $mon+1, $mday,
3179                                   $hour, $min, $sec, $tz);
3180         return %date;
3181 }
3182
3183 sub parse_tag {
3184         my $tag_id = shift;
3185         my %tag;
3186         my @comment;
3187
3188         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3189         $tag{'id'} = $tag_id;
3190         while (my $line = <$fd>) {
3191                 chomp $line;
3192                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3193                         $tag{'object'} = $1;
3194                 } elsif ($line =~ m/^type (.+)$/) {
3195                         $tag{'type'} = $1;
3196                 } elsif ($line =~ m/^tag (.+)$/) {
3197                         $tag{'name'} = $1;
3198                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3199                         $tag{'author'} = $1;
3200                         $tag{'author_epoch'} = $2;
3201                         $tag{'author_tz'} = $3;
3202                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3203                                 $tag{'author_name'}  = $1;
3204                                 $tag{'author_email'} = $2;
3205                         } else {
3206                                 $tag{'author_name'} = $tag{'author'};
3207                         }
3208                 } elsif ($line =~ m/--BEGIN/) {
3209                         push @comment, $line;
3210                         last;
3211                 } elsif ($line eq "") {
3212                         last;
3213                 }
3214         }
3215         push @comment, <$fd>;
3216         $tag{'comment'} = \@comment;
3217         close $fd or return;
3218         if (!defined $tag{'name'}) {
3219                 return
3220         };
3221         return %tag
3222 }
3223
3224 sub parse_commit_text {
3225         my ($commit_text, $withparents) = @_;
3226         my @commit_lines = split '\n', $commit_text;
3227         my %co;
3228
3229         pop @commit_lines; # Remove '\0'
3230
3231         if (! @commit_lines) {
3232                 return;
3233         }
3234
3235         my $header = shift @commit_lines;
3236         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3237                 return;
3238         }
3239         ($co{'id'}, my @parents) = split ' ', $header;
3240         while (my $line = shift @commit_lines) {
3241                 last if $line eq "\n";
3242                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3243                         $co{'tree'} = $1;
3244                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3245                         push @parents, $1;
3246                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3247                         $co{'author'} = to_utf8($1);
3248                         $co{'author_epoch'} = $2;
3249                         $co{'author_tz'} = $3;
3250                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3251                                 $co{'author_name'}  = $1;
3252                                 $co{'author_email'} = $2;
3253                         } else {
3254                                 $co{'author_name'} = $co{'author'};
3255                         }
3256                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3257                         $co{'committer'} = to_utf8($1);
3258                         $co{'committer_epoch'} = $2;
3259                         $co{'committer_tz'} = $3;
3260                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3261                                 $co{'committer_name'}  = $1;
3262                                 $co{'committer_email'} = $2;
3263                         } else {
3264                                 $co{'committer_name'} = $co{'committer'};
3265                         }
3266                 }
3267         }
3268         if (!defined $co{'tree'}) {
3269                 return;
3270         };
3271         $co{'parents'} = \@parents;
3272         $co{'parent'} = $parents[0];
3273
3274         foreach my $title (@commit_lines) {
3275                 $title =~ s/^    //;
3276                 if ($title ne "") {
3277                         $co{'title'} = chop_str($title, 80, 5);
3278                         # remove leading stuff of merges to make the interesting part visible
3279                         if (length($title) > 50) {
3280                                 $title =~ s/^Automatic //;
3281                                 $title =~ s/^merge (of|with) /Merge ... /i;
3282                                 if (length($title) > 50) {
3283                                         $title =~ s/(http|rsync):\/\///;
3284                                 }
3285                                 if (length($title) > 50) {
3286                                         $title =~ s/(master|www|rsync)\.//;
3287                                 }
3288                                 if (length($title) > 50) {
3289                                         $title =~ s/kernel.org:?//;
3290                                 }
3291                                 if (length($title) > 50) {
3292                                         $title =~ s/\/pub\/scm//;
3293                                 }
3294                         }
3295                         $co{'title_short'} = chop_str($title, 50, 5);
3296                         last;
3297                 }
3298         }
3299         if (! defined $co{'title'} || $co{'title'} eq "") {
3300                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3301         }
3302         # remove added spaces
3303         foreach my $line (@commit_lines) {
3304                 $line =~ s/^    //;
3305         }
3306         $co{'comment'} = \@commit_lines;
3307
3308         my $age = time - $co{'committer_epoch'};
3309         $co{'age'} = $age;
3310         $co{'age_string'} = age_string($age);
3311         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3312         if ($age > 60*60*24*7*2) {
3313                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3314                 $co{'age_string_age'} = $co{'age_string'};
3315         } else {
3316                 $co{'age_string_date'} = $co{'age_string'};
3317                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3318         }
3319         return %co;
3320 }
3321
3322 sub parse_commit {
3323         my ($commit_id) = @_;
3324         my %co;
3325
3326         local $/ = "\0";
3327
3328         open my $fd, "-|", git_cmd(), "rev-list",
3329                 "--parents",
3330                 "--header",
3331                 "--max-count=1",
3332                 $commit_id,
3333                 "--",
3334                 or die_error(500, "Open git-rev-list failed");
3335         %co = parse_commit_text(<$fd>, 1);
3336         close $fd;
3337
3338         return %co;
3339 }
3340
3341 sub parse_commits {
3342         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3343         my @cos;
3344
3345         $maxcount ||= 1;
3346         $skip ||= 0;
3347
3348         local $/ = "\0";
3349
3350         open my $fd, "-|", git_cmd(), "rev-list",
3351                 "--header",
3352                 @args,
3353                 ("--max-count=" . $maxcount),
3354                 ("--skip=" . $skip),
3355                 @extra_options,
3356                 $commit_id,
3357                 "--",
3358                 ($filename ? ($filename) : ())
3359                 or die_error(500, "Open git-rev-list failed");
3360         while (my $line = <$fd>) {
3361                 my %co = parse_commit_text($line);
3362                 push @cos, \%co;
3363         }
3364         close $fd;
3365
3366         return wantarray ? @cos : \@cos;
3367 }
3368
3369 # parse line of git-diff-tree "raw" output
3370 sub parse_difftree_raw_line {
3371         my $line = shift;
3372         my %res;
3373
3374         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3375         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3376         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3377                 $res{'from_mode'} = $1;
3378                 $res{'to_mode'} = $2;
3379                 $res{'from_id'} = $3;
3380                 $res{'to_id'} = $4;
3381                 $res{'status'} = $5;
3382                 $res{'similarity'} = $6;
3383                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3384                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3385                 } else {
3386                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3387                 }
3388         }
3389         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3390         # combined diff (for merge commit)
3391         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3392                 $res{'nparents'}  = length($1);
3393                 $res{'from_mode'} = [ split(' ', $2) ];
3394                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3395                 $res{'from_id'} = [ split(' ', $3) ];
3396                 $res{'to_id'} = pop @{$res{'from_id'}};
3397                 $res{'status'} = [ split('', $4) ];
3398                 $res{'to_file'} = unquote($5);
3399         }
3400         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3401         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3402                 $res{'commit'} = $1;
3403         }
3404
3405         return wantarray ? %res : \%res;
3406 }
3407
3408 # wrapper: return parsed line of git-diff-tree "raw" output
3409 # (the argument might be raw line, or parsed info)
3410 sub parsed_difftree_line {
3411         my $line_or_ref = shift;
3412
3413         if (ref($line_or_ref) eq "HASH") {
3414                 # pre-parsed (or generated by hand)
3415                 return $line_or_ref;
3416         } else {
3417                 return parse_difftree_raw_line($line_or_ref);
3418         }
3419 }
3420
3421 # parse line of git-ls-tree output
3422 sub parse_ls_tree_line {
3423         my $line = shift;
3424         my %opts = @_;
3425         my %res;
3426
3427         if ($opts{'-l'}) {
3428                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3429                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3430
3431                 $res{'mode'} = $1;
3432                 $res{'type'} = $2;
3433                 $res{'hash'} = $3;
3434                 $res{'size'} = $4;
3435                 if ($opts{'-z'}) {
3436                         $res{'name'} = $5;
3437                 } else {
3438                         $res{'name'} = unquote($5);
3439                 }
3440         } else {
3441                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3442                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3443
3444                 $res{'mode'} = $1;
3445                 $res{'type'} = $2;
3446                 $res{'hash'} = $3;
3447                 if ($opts{'-z'}) {
3448                         $res{'name'} = $4;
3449                 } else {
3450                         $res{'name'} = unquote($4);
3451                 }
3452         }
3453
3454         return wantarray ? %res : \%res;
3455 }
3456
3457 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3458 sub parse_from_to_diffinfo {
3459         my ($diffinfo, $from, $to, @parents) = @_;
3460
3461         if ($diffinfo->{'nparents'}) {
3462                 # combined diff
3463                 $from->{'file'} = [];
3464                 $from->{'href'} = [];
3465                 fill_from_file_info($diffinfo, @parents)
3466                         unless exists $diffinfo->{'from_file'};
3467                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3468                         $from->{'file'}[$i] =
3469                                 defined $diffinfo->{'from_file'}[$i] ?
3470                                         $diffinfo->{'from_file'}[$i] :
3471                                         $diffinfo->{'to_file'};
3472                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3473                                 $from->{'href'}[$i] = href(action=>"blob",
3474                                                            hash_base=>$parents[$i],
3475                                                            hash=>$diffinfo->{'from_id'}[$i],
3476                                                            file_name=>$from->{'file'}[$i]);
3477                         } else {
3478                                 $from->{'href'}[$i] = undef;
3479                         }
3480                 }
3481         } else {
3482                 # ordinary (not combined) diff
3483                 $from->{'file'} = $diffinfo->{'from_file'};
3484                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3485                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3486                                                hash=>$diffinfo->{'from_id'},
3487                                                file_name=>$from->{'file'});
3488                 } else {
3489                         delete $from->{'href'};
3490                 }
3491         }
3492
3493         $to->{'file'} = $diffinfo->{'to_file'};
3494         if (!is_deleted($diffinfo)) { # file exists in result
3495                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3496                                      hash=>$diffinfo->{'to_id'},
3497                                      file_name=>$to->{'file'});
3498         } else {
3499                 delete $to->{'href'};
3500         }
3501 }
3502
3503 ## ......................................................................
3504 ## parse to array of hashes functions
3505
3506 sub git_get_heads_list {
3507         my ($limit, @classes) = @_;
3508         @classes = ('heads') unless @classes;
3509         my @patterns = map { "refs/$_" } @classes;
3510         my @headslist;
3511
3512         open my $fd, '-|', git_cmd(), 'for-each-ref',
3513                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3514                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3515                 @patterns
3516                 or return;
3517         while (my $line = <$fd>) {
3518                 my %ref_item;
3519
3520                 chomp $line;
3521                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3522                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3523                 my ($committer, $epoch, $tz) =
3524                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3525                 $ref_item{'fullname'}  = $name;
3526                 $name =~ s!^refs/(?:head|remote)s/!!;
3527
3528                 $ref_item{'name'}  = $name;
3529                 $ref_item{'id'}    = $hash;
3530                 $ref_item{'title'} = $title || '(no commit message)';
3531                 $ref_item{'epoch'} = $epoch;
3532                 if ($epoch) {
3533                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3534                 } else {
3535                         $ref_item{'age'} = "unknown";
3536                 }
3537
3538                 push @headslist, \%ref_item;
3539         }
3540         close $fd;
3541
3542         return wantarray ? @headslist : \@headslist;
3543 }
3544
3545 sub git_get_tags_list {
3546         my $limit = shift;
3547         my @tagslist;
3548
3549         open my $fd, '-|', git_cmd(), 'for-each-ref',
3550                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3551                 '--format=%(objectname) %(objecttype) %(refname) '.
3552                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3553                 'refs/tags'
3554                 or return;
3555         while (my $line = <$fd>) {
3556                 my %ref_item;
3557
3558                 chomp $line;
3559                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3560                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3561                 my ($creator, $epoch, $tz) =
3562                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3563                 $ref_item{'fullname'} = $name;
3564                 $name =~ s!^refs/tags/!!;
3565
3566                 $ref_item{'type'} = $type;
3567                 $ref_item{'id'} = $id;
3568                 $ref_item{'name'} = $name;
3569                 if ($type eq "tag") {
3570                         $ref_item{'subject'} = $title;
3571                         $ref_item{'reftype'} = $reftype;
3572                         $ref_item{'refid'}   = $refid;
3573                 } else {
3574                         $ref_item{'reftype'} = $type;
3575                         $ref_item{'refid'}   = $id;
3576                 }
3577
3578                 if ($type eq "tag" || $type eq "commit") {
3579                         $ref_item{'epoch'} = $epoch;
3580                         if ($epoch) {
3581                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3582                         } else {
3583                                 $ref_item{'age'} = "unknown";
3584                         }
3585                 }
3586
3587                 push @tagslist, \%ref_item;
3588         }
3589         close $fd;
3590
3591         return wantarray ? @tagslist : \@tagslist;
3592 }
3593
3594 ## ----------------------------------------------------------------------
3595 ## filesystem-related functions
3596
3597 sub get_file_owner {
3598         my $path = shift;
3599
3600         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3601         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3602         if (!defined $gcos) {
3603                 return undef;
3604         }
3605         my $owner = $gcos;
3606         $owner =~ s/[,;].*$//;
3607         return to_utf8($owner);
3608 }
3609
3610 # assume that file exists
3611 sub insert_file {
3612         my $filename = shift;
3613
3614         open my $fd, '<', $filename;
3615         print map { to_utf8($_) } <$fd>;
3616         close $fd;
3617 }
3618
3619 ## ......................................................................
3620 ## mimetype related functions
3621
3622 sub mimetype_guess_file {
3623         my $filename = shift;
3624         my $mimemap = shift;
3625         -r $mimemap or return undef;
3626
3627         my %mimemap;
3628         open(my $mh, '<', $mimemap) or return undef;
3629         while (<$mh>) {
3630                 next if m/^#/; # skip comments
3631                 my ($mimetype, @exts) = split(/\s+/);
3632                 foreach my $ext (@exts) {
3633                         $mimemap{$ext} = $mimetype;
3634                 }
3635         }
3636         close($mh);
3637
3638         $filename =~ /\.([^.]*)$/;
3639         return $mimemap{$1};
3640 }
3641
3642 sub mimetype_guess {
3643         my $filename = shift;
3644         my $mime;
3645         $filename =~ /\./ or return undef;
3646
3647         if ($mimetypes_file) {
3648                 my $file = $mimetypes_file;
3649                 if ($file !~ m!^/!) { # if it is relative path
3650                         # it is relative to project
3651                         $file = "$projectroot/$project/$file";
3652                 }
3653                 $mime = mimetype_guess_file($filename, $file);
3654         }
3655         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3656         return $mime;
3657 }
3658
3659 sub blob_mimetype {
3660         my $fd = shift;
3661         my $filename = shift;
3662
3663         if ($filename) {
3664                 my $mime = mimetype_guess($filename);
3665                 $mime and return $mime;
3666         }
3667
3668         # just in case
3669         return $default_blob_plain_mimetype unless $fd;
3670
3671         if (-T $fd) {
3672                 return 'text/plain';
3673         } elsif (! $filename) {
3674                 return 'application/octet-stream';
3675         } elsif ($filename =~ m/\.png$/i) {
3676                 return 'image/png';
3677         } elsif ($filename =~ m/\.gif$/i) {
3678                 return 'image/gif';
3679         } elsif ($filename =~ m/\.jpe?g$/i) {
3680                 return 'image/jpeg';
3681         } else {
3682                 return 'application/octet-stream';
3683         }
3684 }
3685
3686 sub blob_contenttype {
3687         my ($fd, $file_name, $type) = @_;
3688
3689         $type ||= blob_mimetype($fd, $file_name);
3690         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3691                 $type .= "; charset=$default_text_plain_charset";
3692         }
3693
3694         return $type;
3695 }
3696
3697 # guess file syntax for syntax highlighting; return undef if no highlighting
3698 # the name of syntax can (in the future) depend on syntax highlighter used
3699 sub guess_file_syntax {
3700         my ($highlight, $mimetype, $file_name) = @_;
3701         return undef unless ($highlight && defined $file_name);
3702         my $basename = basename($file_name, '.in');
3703         return $highlight_basename{$basename}
3704                 if exists $highlight_basename{$basename};
3705
3706         $basename =~ /\.([^.]*)$/;
3707         my $ext = $1 or return undef;
3708         return $highlight_ext{$ext}
3709                 if exists $highlight_ext{$ext};
3710
3711         return undef;
3712 }
3713
3714 # run highlighter and return FD of its output,
3715 # or return original FD if no highlighting
3716 sub run_highlighter {
3717         my ($fd, $highlight, $syntax) = @_;
3718         return $fd unless ($highlight && defined $syntax);
3719
3720         close $fd;
3721         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3722                   quote_command($highlight_bin).
3723                   " --replace-tabs=8 --fragment --syntax $syntax |"
3724                 or die_error(500, "Couldn't open file or run syntax highlighter");
3725         return $fd;
3726 }
3727
3728 ## ======================================================================
3729 ## functions printing HTML: header, footer, error page
3730
3731 sub get_page_title {
3732         my $title = to_utf8($site_name);
3733
3734         return $title unless (defined $project);
3735         $title .= " - " . to_utf8($project);
3736
3737         return $title unless (defined $action);
3738         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3739
3740         return $title unless (defined $file_name);
3741         $title .= " - " . esc_path($file_name);
3742         if ($action eq "tree" && $file_name !~ m|/$|) {
3743                 $title .= "/";
3744         }
3745
3746         return $title;
3747 }
3748
3749 sub get_content_type_html {
3750         # require explicit support from the UA if we are to send the page as
3751         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3752         # we have to do this because MSIE sometimes globs '*/*', pretending to
3753         # support xhtml+xml but choking when it gets what it asked for.
3754         if (defined $cgi->http('HTTP_ACCEPT') &&
3755             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3756             $cgi->Accept('application/xhtml+xml') != 0) {
3757                 return 'application/xhtml+xml';
3758         } else {
3759                 return 'text/html';
3760         }
3761 }
3762
3763 sub print_feed_meta {
3764         if (defined $project) {
3765                 my %href_params = get_feed_info();
3766                 if (!exists $href_params{'-title'}) {
3767                         $href_params{'-title'} = 'log';
3768                 }
3769
3770                 foreach my $format (qw(RSS Atom)) {
3771                         my $type = lc($format);
3772                         my %link_attr = (
3773                                 '-rel' => 'alternate',
3774                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3775                                 '-type' => "application/$type+xml"
3776                         );
3777
3778                         $href_params{'action'} = $type;
3779                         $link_attr{'-href'} = href(%href_params);
3780                         print "<link ".
3781                               "rel=\"$link_attr{'-rel'}\" ".
3782                               "title=\"$link_attr{'-title'}\" ".
3783                               "href=\"$link_attr{'-href'}\" ".
3784                               "type=\"$link_attr{'-type'}\" ".
3785                               "/>\n";
3786
3787                         $href_params{'extra_options'} = '--no-merges';
3788                         $link_attr{'-href'} = href(%href_params);
3789                         $link_attr{'-title'} .= ' (no merges)';
3790                         print "<link ".
3791                               "rel=\"$link_attr{'-rel'}\" ".
3792                               "title=\"$link_attr{'-title'}\" ".
3793                               "href=\"$link_attr{'-href'}\" ".
3794                               "type=\"$link_attr{'-type'}\" ".
3795                               "/>\n";
3796                 }
3797
3798         } else {
3799                 printf('<link rel="alternate" title="%s projects list" '.
3800                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3801                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3802                 printf('<link rel="alternate" title="%s projects feeds" '.
3803                        'href="%s" type="text/x-opml" />'."\n",
3804                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3805         }
3806 }
3807
3808 sub print_header_links {
3809         my $status = shift;
3810
3811         # print out each stylesheet that exist, providing backwards capability
3812         # for those people who defined $stylesheet in a config file
3813         if (defined $stylesheet) {
3814                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3815         } else {
3816                 foreach my $stylesheet (@stylesheets) {
3817                         next unless $stylesheet;
3818                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3819                 }
3820         }
3821         print_feed_meta()
3822                 if ($status eq '200 OK');
3823         if (defined $favicon) {
3824                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3825         }
3826 }
3827
3828 sub print_nav_breadcrumbs {
3829         my %opts = @_;
3830
3831         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3832         if (defined $project) {
3833                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3834                 if (defined $action) {
3835                         my $action_print = $action ;
3836                         if (defined $opts{-action_extra}) {
3837                                 $action_print = $cgi->a({-href => href(action=>$action)},
3838                                         $action);
3839                         }
3840                         print " / $action_print";
3841                 }
3842                 if (defined $opts{-action_extra}) {
3843                         print " / $opts{-action_extra}";
3844                 }
3845                 print "\n";
3846         }
3847 }
3848
3849 sub print_search_form {
3850         if (!defined $searchtext) {
3851                 $searchtext = "";
3852         }
3853         my $search_hash;
3854         if (defined $hash_base) {
3855                 $search_hash = $hash_base;
3856         } elsif (defined $hash) {
3857                 $search_hash = $hash;
3858         } else {
3859                 $search_hash = "HEAD";
3860         }
3861         my $action = $my_uri;
3862         my $use_pathinfo = gitweb_check_feature('pathinfo');
3863         if ($use_pathinfo) {
3864                 $action .= "/".esc_url($project);
3865         }
3866         print $cgi->startform(-method => "get", -action => $action) .
3867               "<div class=\"search\">\n" .
3868               (!$use_pathinfo &&
3869               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3870               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3871               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3872               $cgi->popup_menu(-name => 'st', -default => 'commit',
3873                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3874               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3875               " search:\n",
3876               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3877               "<span title=\"Extended regular expression\">" .
3878               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3879                              -checked => $search_use_regexp) .
3880               "</span>" .
3881               "</div>" .
3882               $cgi->end_form() . "\n";
3883 }
3884
3885 sub git_header_html {
3886         my $status = shift || "200 OK";
3887         my $expires = shift;
3888         my %opts = @_;
3889
3890         my $title = get_page_title();
3891         my $content_type = get_content_type_html();
3892         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3893                            -status=> $status, -expires => $expires)
3894                 unless ($opts{'-no_http_header'});
3895         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3896         print <<EOF;
3897 <?xml version="1.0" encoding="utf-8"?>
3898 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3899 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3900 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3901 <!-- git core binaries version $git_version -->
3902 <head>
3903 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3904 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3905 <meta name="robots" content="index, nofollow"/>
3906 <title>$title</title>
3907 EOF
3908         # the stylesheet, favicon etc urls won't work correctly with path_info
3909         # unless we set the appropriate base URL
3910         if ($ENV{'PATH_INFO'}) {
3911                 print "<base href=\"".esc_url($base_url)."\" />\n";
3912         }
3913         print_header_links($status);
3914
3915         if (defined $site_html_head_string) {
3916                 print to_utf8($site_html_head_string);
3917         }
3918
3919         print "</head>\n" .
3920               "<body>\n";
3921
3922         if (defined $site_header && -f $site_header) {
3923                 insert_file($site_header);
3924         }
3925
3926         print "<div class=\"page_header\">\n";
3927         if (defined $logo) {
3928                 print $cgi->a({-href => esc_url($logo_url),
3929                                -title => $logo_label},
3930                               $cgi->img({-src => esc_url($logo),
3931                                          -width => 72, -height => 27,
3932                                          -alt => "git",
3933                                          -class => "logo"}));
3934         }
3935         print_nav_breadcrumbs(%opts);
3936         print "</div>\n";
3937
3938         my $have_search = gitweb_check_feature('search');
3939         if (defined $project && $have_search) {
3940                 print_search_form();
3941         }
3942 }
3943
3944 sub git_footer_html {
3945         my $feed_class = 'rss_logo';
3946
3947         print "<div class=\"page_footer\">\n";
3948         if (defined $project) {
3949                 my $descr = git_get_project_description($project);
3950                 if (defined $descr) {
3951                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3952                 }
3953
3954                 my %href_params = get_feed_info();
3955                 if (!%href_params) {
3956                         $feed_class .= ' generic';
3957                 }
3958                 $href_params{'-title'} ||= 'log';
3959
3960                 foreach my $format (qw(RSS Atom)) {
3961                         $href_params{'action'} = lc($format);
3962                         print $cgi->a({-href => href(%href_params),
3963                                       -title => "$href_params{'-title'} $format feed",
3964                                       -class => $feed_class}, $format)."\n";
3965                 }
3966
3967         } else {
3968                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3969                               -class => $feed_class}, "OPML") . " ";
3970                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3971                               -class => $feed_class}, "TXT") . "\n";
3972         }
3973         print "</div>\n"; # class="page_footer"
3974
3975         if (defined $t0 && gitweb_check_feature('timed')) {
3976                 print "<div id=\"generating_info\">\n";
3977                 print 'This page took '.
3978                       '<span id="generating_time" class="time_span">'.
3979                       tv_interval($t0, [ gettimeofday() ]).
3980                       ' seconds </span>'.
3981                       ' and '.
3982                       '<span id="generating_cmd">'.
3983                       $number_of_git_cmds.
3984                       '</span> git commands '.
3985                       " to generate.\n";
3986                 print "</div>\n"; # class="page_footer"
3987         }
3988
3989         if (defined $site_footer && -f $site_footer) {
3990                 insert_file($site_footer);
3991         }
3992
3993         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3994         if (defined $action &&
3995             $action eq 'blame_incremental') {
3996                 print qq!<script type="text/javascript">\n!.
3997                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3998                       qq!           "!. href() .qq!");\n!.
3999                       qq!</script>\n!;
4000         } else {
4001                 my ($jstimezone, $tz_cookie, $datetime_class) =
4002                         gitweb_get_feature('javascript-timezone');
4003
4004                 print qq!<script type="text/javascript">\n!.
4005                       qq!window.onload = function () {\n!;
4006                 if (gitweb_check_feature('javascript-actions')) {
4007                         print qq!       fixLinks();\n!;
4008                 }
4009                 if ($jstimezone && $tz_cookie && $datetime_class) {
4010                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4011                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4012                 }
4013                 print qq!};\n!.
4014                       qq!</script>\n!;
4015         }
4016
4017         print "</body>\n" .
4018               "</html>";
4019 }
4020
4021 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4022 # Example: die_error(404, 'Hash not found')
4023 # By convention, use the following status codes (as defined in RFC 2616):
4024 # 400: Invalid or missing CGI parameters, or
4025 #      requested object exists but has wrong type.
4026 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4027 #      this server or project.
4028 # 404: Requested object/revision/project doesn't exist.
4029 # 500: The server isn't configured properly, or
4030 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4031 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4032 # 503: The server is currently unavailable (because it is overloaded,
4033 #      or down for maintenance).  Generally, this is a temporary state.
4034 sub die_error {
4035         my $status = shift || 500;
4036         my $error = esc_html(shift) || "Internal Server Error";
4037         my $extra = shift;
4038         my %opts = @_;
4039
4040         my %http_responses = (
4041                 400 => '400 Bad Request',
4042                 403 => '403 Forbidden',
4043                 404 => '404 Not Found',
4044                 500 => '500 Internal Server Error',
4045                 503 => '503 Service Unavailable',
4046         );
4047         git_header_html($http_responses{$status}, undef, %opts);
4048         print <<EOF;
4049 <div class="page_body">
4050 <br /><br />
4051 $status - $error
4052 <br />
4053 EOF
4054         if (defined $extra) {
4055                 print "<hr />\n" .
4056                       "$extra\n";
4057         }
4058         print "</div>\n";
4059
4060         git_footer_html();
4061         goto DONE_GITWEB
4062                 unless ($opts{'-error_handler'});
4063 }
4064
4065 ## ----------------------------------------------------------------------
4066 ## functions printing or outputting HTML: navigation
4067
4068 sub git_print_page_nav {
4069         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4070         $extra = '' if !defined $extra; # pager or formats
4071
4072         my @navs = qw(summary shortlog log commit commitdiff tree);
4073         if ($suppress) {
4074                 @navs = grep { $_ ne $suppress } @navs;
4075         }
4076
4077         my %arg = map { $_ => {action=>$_} } @navs;
4078         if (defined $head) {
4079                 for (qw(commit commitdiff)) {
4080                         $arg{$_}{'hash'} = $head;
4081                 }
4082                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4083                         for (qw(shortlog log)) {
4084                                 $arg{$_}{'hash'} = $head;
4085                         }
4086                 }
4087         }
4088
4089         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4090         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4091
4092         my @actions = gitweb_get_feature('actions');
4093         my %repl = (
4094                 '%' => '%',
4095                 'n' => $project,         # project name
4096                 'f' => $git_dir,         # project path within filesystem
4097                 'h' => $treehead || '',  # current hash ('h' parameter)
4098                 'b' => $treebase || '',  # hash base ('hb' parameter)
4099         );
4100         while (@actions) {
4101                 my ($label, $link, $pos) = splice(@actions,0,3);
4102                 # insert
4103                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4104                 # munch munch
4105                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4106                 $arg{$label}{'_href'} = $link;
4107         }
4108
4109         print "<div class=\"page_nav\">\n" .
4110                 (join " | ",
4111                  map { $_ eq $current ?
4112                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4113                  } @navs);
4114         print "<br/>\n$extra<br/>\n" .
4115               "</div>\n";
4116 }
4117
4118 # returns a submenu for the nagivation of the refs views (tags, heads,
4119 # remotes) with the current view disabled and the remotes view only
4120 # available if the feature is enabled
4121 sub format_ref_views {
4122         my ($current) = @_;
4123         my @ref_views = qw{tags heads};
4124         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4125         return join " | ", map {
4126                 $_ eq $current ? $_ :
4127                 $cgi->a({-href => href(action=>$_)}, $_)
4128         } @ref_views
4129 }
4130
4131 sub format_paging_nav {
4132         my ($action, $page, $has_next_link) = @_;
4133         my $paging_nav;
4134
4135
4136         if ($page > 0) {
4137                 $paging_nav .=
4138                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4139                         " &sdot; " .
4140                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4141                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4142         } else {
4143                 $paging_nav .= "first &sdot; prev";
4144         }
4145
4146         if ($has_next_link) {
4147                 $paging_nav .= " &sdot; " .
4148                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4149                                  -accesskey => "n", -title => "Alt-n"}, "next");
4150         } else {
4151                 $paging_nav .= " &sdot; next";
4152         }
4153
4154         return $paging_nav;
4155 }
4156
4157 ## ......................................................................
4158 ## functions printing or outputting HTML: div
4159
4160 sub git_print_header_div {
4161         my ($action, $title, $hash, $hash_base) = @_;
4162         my %args = ();
4163
4164         $args{'action'} = $action;
4165         $args{'hash'} = $hash if $hash;
4166         $args{'hash_base'} = $hash_base if $hash_base;
4167
4168         print "<div class=\"header\">\n" .
4169               $cgi->a({-href => href(%args), -class => "title"},
4170               $title ? $title : $action) .
4171               "\n</div>\n";
4172 }
4173
4174 sub format_repo_url {
4175         my ($name, $url) = @_;
4176         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4177 }
4178
4179 # Group output by placing it in a DIV element and adding a header.
4180 # Options for start_div() can be provided by passing a hash reference as the
4181 # first parameter to the function.
4182 # Options to git_print_header_div() can be provided by passing an array
4183 # reference. This must follow the options to start_div if they are present.
4184 # The content can be a scalar, which is output as-is, a scalar reference, which
4185 # is output after html escaping, an IO handle passed either as *handle or
4186 # *handle{IO}, or a function reference. In the latter case all following
4187 # parameters will be taken as argument to the content function call.
4188 sub git_print_section {
4189         my ($div_args, $header_args, $content);
4190         my $arg = shift;
4191         if (ref($arg) eq 'HASH') {
4192                 $div_args = $arg;
4193                 $arg = shift;
4194         }
4195         if (ref($arg) eq 'ARRAY') {
4196                 $header_args = $arg;
4197                 $arg = shift;
4198         }
4199         $content = $arg;
4200
4201         print $cgi->start_div($div_args);
4202         git_print_header_div(@$header_args);
4203
4204         if (ref($content) eq 'CODE') {
4205                 $content->(@_);
4206         } elsif (ref($content) eq 'SCALAR') {
4207                 print esc_html($$content);
4208         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4209                 print <$content>;
4210         } elsif (!ref($content) && defined($content)) {
4211                 print $content;
4212         }
4213
4214         print $cgi->end_div;
4215 }
4216
4217 sub format_timestamp_html {
4218         my $date = shift;
4219         my $strtime = $date->{'rfc2822'};
4220
4221         my (undef, undef, $datetime_class) =
4222                 gitweb_get_feature('javascript-timezone');
4223         if ($datetime_class) {
4224                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4225         }
4226
4227         my $localtime_format = '(%02d:%02d %s)';
4228         if ($date->{'hour_local'} < 6) {
4229                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4230         }
4231         $strtime .= ' ' .
4232                     sprintf($localtime_format,
4233                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4234
4235         return $strtime;
4236 }
4237
4238 # Outputs the author name and date in long form
4239 sub git_print_authorship {
4240         my $co = shift;
4241         my %opts = @_;
4242         my $tag = $opts{-tag} || 'div';
4243         my $author = $co->{'author_name'};
4244
4245         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4246         print "<$tag class=\"author_date\">" .
4247               format_search_author($author, "author", esc_html($author)) .
4248               " [".format_timestamp_html(\%ad)."]".
4249               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4250               "</$tag>\n";
4251 }
4252
4253 # Outputs table rows containing the full author or committer information,
4254 # in the format expected for 'commit' view (& similar).
4255 # Parameters are a commit hash reference, followed by the list of people
4256 # to output information for. If the list is empty it defaults to both
4257 # author and committer.
4258 sub git_print_authorship_rows {
4259         my $co = shift;
4260         # too bad we can't use @people = @_ || ('author', 'committer')
4261         my @people = @_;
4262         @people = ('author', 'committer') unless @people;
4263         foreach my $who (@people) {
4264                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4265                 print "<tr><td>$who</td><td>" .
4266                       format_search_author($co->{"${who}_name"}, $who,
4267                                            esc_html($co->{"${who}_name"})) . " " .
4268                       format_search_author($co->{"${who}_email"}, $who,
4269                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4270                       "</td><td rowspan=\"2\">" .
4271                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4272                       "</td></tr>\n" .
4273                       "<tr>" .
4274                       "<td></td><td>" .
4275                       format_timestamp_html(\%wd) .
4276                       "</td>" .
4277                       "</tr>\n";
4278         }
4279 }
4280
4281 sub git_print_page_path {
4282         my $name = shift;
4283         my $type = shift;
4284         my $hb = shift;
4285
4286
4287         print "<div class=\"page_path\">";
4288         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4289                       -title => 'tree root'}, to_utf8("[$project]"));
4290         print " / ";
4291         if (defined $name) {
4292                 my @dirname = split '/', $name;
4293                 my $basename = pop @dirname;
4294                 my $fullname = '';
4295
4296                 foreach my $dir (@dirname) {
4297                         $fullname .= ($fullname ? '/' : '') . $dir;
4298                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4299                                                      hash_base=>$hb),
4300                                       -title => $fullname}, esc_path($dir));
4301                         print " / ";
4302                 }
4303                 if (defined $type && $type eq 'blob') {
4304                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4305                                                      hash_base=>$hb),
4306                                       -title => $name}, esc_path($basename));
4307                         if (gitweb_check_feature('highlight')) {
4308                                 print '&nbsp;&nbsp;&nbsp;&nbsp;
4309 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4310 <script>
4311 function toggleLineNumbers() {
4312         e = document.getElementById("lineNoStyle");
4313         e2 = document.getElementById("lineNoToggle");
4314         if (e2.innerHTML == "[Hide line numbers]") {
4315                 e.innerHTML = ".linenr { display:none; }";
4316                 e2.innerHTML = "[Show line numbers]";
4317         }
4318         else {
4319                 e.innerHTML = "";
4320                 e2.innerHTML = "[Hide line numbers]";
4321         }
4322 }
4323 var style = document.createElement("style");
4324 style.setAttribute("id", "lineNoStyle");
4325 document.getElementsByTagName("head")[0].appendChild(style);
4326 toggleLineNumbers();
4327 </script>
4328 ';
4329                         }
4330                 } elsif (defined $type && $type eq 'tree') {
4331                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4332                                                      hash_base=>$hb),
4333                                       -title => $name}, esc_path($basename));
4334                         print " / ";
4335                 } else {
4336                         print esc_path($basename);
4337                 }
4338         }
4339         print "<br/></div>\n";
4340 }
4341
4342 sub git_print_log {
4343         my $log = shift;
4344         my %opts = @_;
4345
4346         if ($opts{'-remove_title'}) {
4347                 # remove title, i.e. first line of log
4348                 shift @$log;
4349         }
4350         # remove leading empty lines
4351         while (defined $log->[0] && $log->[0] eq "") {
4352                 shift @$log;
4353         }
4354
4355         # print log
4356         my $signoff = 0;
4357         my $empty = 0;
4358         foreach my $line (@$log) {
4359                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4360                         $signoff = 1;
4361                         $empty = 0;
4362                         if (! $opts{'-remove_signoff'}) {
4363                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4364                                 next;
4365                         } else {
4366                                 # remove signoff lines
4367                                 next;
4368                         }
4369                 } else {
4370                         $signoff = 0;
4371                 }
4372
4373                 # print only one empty line
4374                 # do not print empty line after signoff
4375                 if ($line eq "") {
4376                         next if ($empty || $signoff);
4377                         $empty = 1;
4378                 } else {
4379                         $empty = 0;
4380                 }
4381
4382                 print format_log_line_html($line) . "<br/>\n";
4383         }
4384
4385         if ($opts{'-final_empty_line'}) {
4386                 # end with single empty line
4387                 print "<br/>\n" unless $empty;
4388         }
4389 }
4390
4391 # return link target (what link points to)
4392 sub git_get_link_target {
4393         my $hash = shift;
4394         my $link_target;
4395
4396         # read link
4397         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4398                 or return;
4399         {
4400                 local $/ = undef;
4401                 $link_target = <$fd>;
4402         }
4403         close $fd
4404                 or return;
4405
4406         return $link_target;
4407 }
4408
4409 # given link target, and the directory (basedir) the link is in,
4410 # return target of link relative to top directory (top tree);
4411 # return undef if it is not possible (including absolute links).
4412 sub normalize_link_target {
4413         my ($link_target, $basedir) = @_;
4414
4415         # absolute symlinks (beginning with '/') cannot be normalized
4416         return if (substr($link_target, 0, 1) eq '/');
4417
4418         # normalize link target to path from top (root) tree (dir)
4419         my $path;
4420         if ($basedir) {
4421                 $path = $basedir . '/' . $link_target;
4422         } else {
4423                 # we are in top (root) tree (dir)
4424                 $path = $link_target;
4425         }
4426
4427         # remove //, /./, and /../
4428         my @path_parts;
4429         foreach my $part (split('/', $path)) {
4430                 # discard '.' and ''
4431                 next if (!$part || $part eq '.');
4432                 # handle '..'
4433                 if ($part eq '..') {
4434                         if (@path_parts) {
4435                                 pop @path_parts;
4436                         } else {
4437                                 # link leads outside repository (outside top dir)
4438                                 return;
4439                         }
4440                 } else {
4441                         push @path_parts, $part;
4442                 }
4443         }
4444         $path = join('/', @path_parts);
4445
4446         return $path;
4447 }
4448
4449 # print tree entry (row of git_tree), but without encompassing <tr> element
4450 sub git_print_tree_entry {
4451         my ($t, $basedir, $hash_base, $have_blame) = @_;
4452
4453         my %base_key = ();
4454         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4455
4456         # The format of a table row is: mode list link.  Where mode is
4457         # the mode of the entry, list is the name of the entry, an href,
4458         # and link is the action links of the entry.
4459
4460         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4461         if (exists $t->{'size'}) {
4462                 print "<td class=\"size\">$t->{'size'}</td>\n";
4463         }
4464         if ($t->{'type'} eq "blob") {
4465                 print "<td class=\"list\">" .
4466                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4467                                                file_name=>"$basedir$t->{'name'}", %base_key),
4468                                 -class => "list"}, esc_path($t->{'name'}));
4469                 if (S_ISLNK(oct $t->{'mode'})) {
4470                         my $link_target = git_get_link_target($t->{'hash'});
4471                         if ($link_target) {
4472                                 my $norm_target = normalize_link_target($link_target, $basedir);
4473                                 if (defined $norm_target) {
4474                                         print " -> " .
4475                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4476                                                                      file_name=>$norm_target),
4477                                                        -title => $norm_target}, esc_path($link_target));
4478                                 } else {
4479                                         print " -> " . esc_path($link_target);
4480                                 }
4481                         }
4482                 }
4483                 print "</td>\n";
4484                 print "<td class=\"link\">";
4485                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4486                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4487                               "blob");
4488                 if ($have_blame) {
4489                         print " | " .
4490                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4491                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4492                                       "blame");
4493                 }
4494                 if (defined $hash_base) {
4495                         print " | " .
4496                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4497                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4498                                       "history");
4499                 }
4500                 print " | " .
4501                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4502                                                file_name=>"$basedir$t->{'name'}")},
4503                                 "raw");
4504                 print "</td>\n";
4505
4506         } elsif ($t->{'type'} eq "tree") {
4507                 print "<td class=\"list\">";
4508                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4509                                              file_name=>"$basedir$t->{'name'}",
4510                                              %base_key)},
4511                               esc_path($t->{'name'}));
4512                 print "</td>\n";
4513                 print "<td class=\"link\">";
4514                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4515                                              file_name=>"$basedir$t->{'name'}",
4516                                              %base_key)},
4517                               "tree");
4518                 if (defined $hash_base) {
4519                         print " | " .
4520                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4521                                                      file_name=>"$basedir$t->{'name'}")},
4522                                       "history");
4523                 }
4524                 print "</td>\n";
4525         } else {
4526                 # unknown object: we can only present history for it
4527                 # (this includes 'commit' object, i.e. submodule support)
4528                 print "<td class=\"list\">" .
4529                       esc_path($t->{'name'}) .
4530                       "</td>\n";
4531                 print "<td class=\"link\">";
4532                 if (defined $hash_base) {
4533                         print $cgi->a({-href => href(action=>"history",
4534                                                      hash_base=>$hash_base,
4535                                                      file_name=>"$basedir$t->{'name'}")},
4536                                       "history");
4537                 }
4538                 print "</td>\n";
4539         }
4540 }
4541
4542 ## ......................................................................
4543 ## functions printing large fragments of HTML
4544
4545 # get pre-image filenames for merge (combined) diff
4546 sub fill_from_file_info {
4547         my ($diff, @parents) = @_;
4548
4549         $diff->{'from_file'} = [ ];
4550         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4551         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4552                 if ($diff->{'status'}[$i] eq 'R' ||
4553                     $diff->{'status'}[$i] eq 'C') {
4554                         $diff->{'from_file'}[$i] =
4555                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4556                 }
4557         }
4558
4559         return $diff;
4560 }
4561
4562 # is current raw difftree line of file deletion
4563 sub is_deleted {
4564         my $diffinfo = shift;
4565
4566         return $diffinfo->{'to_id'} eq ('0' x 40);
4567 }
4568
4569 # does patch correspond to [previous] difftree raw line
4570 # $diffinfo  - hashref of parsed raw diff format
4571 # $patchinfo - hashref of parsed patch diff format
4572 #              (the same keys as in $diffinfo)
4573 sub is_patch_split {
4574         my ($diffinfo, $patchinfo) = @_;
4575
4576         return defined $diffinfo && defined $patchinfo
4577                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4578 }
4579
4580
4581 sub git_difftree_body {
4582         my ($difftree, $hash, @parents) = @_;
4583         my ($parent) = $parents[0];
4584         my $have_blame = gitweb_check_feature('blame');
4585         print "<div class=\"list_head\">\n";
4586         if ($#{$difftree} > 10) {
4587                 print(($#{$difftree} + 1) . " files changed:\n");
4588         }
4589         print "</div>\n";
4590
4591         print "<table class=\"" .
4592               (@parents > 1 ? "combined " : "") .
4593               "diff_tree\">\n";
4594
4595         # header only for combined diff in 'commitdiff' view
4596         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4597         if ($has_header) {
4598                 # table header
4599                 print "<thead><tr>\n" .
4600                        "<th></th><th></th>\n"; # filename, patchN link
4601                 for (my $i = 0; $i < @parents; $i++) {
4602                         my $par = $parents[$i];
4603                         print "<th>" .
4604                               $cgi->a({-href => href(action=>"commitdiff",
4605                                                      hash=>$hash, hash_parent=>$par),
4606                                        -title => 'commitdiff to parent number ' .
4607                                                   ($i+1) . ': ' . substr($par,0,7)},
4608                                       $i+1) .
4609                               "&nbsp;</th>\n";
4610                 }
4611                 print "</tr></thead>\n<tbody>\n";
4612         }
4613
4614         my $alternate = 1;
4615         my $patchno = 0;
4616         foreach my $line (@{$difftree}) {
4617                 my $diff = parsed_difftree_line($line);
4618
4619                 if ($alternate) {
4620                         print "<tr class=\"dark\">\n";
4621                 } else {
4622                         print "<tr class=\"light\">\n";
4623                 }
4624                 $alternate ^= 1;
4625
4626                 if (exists $diff->{'nparents'}) { # combined diff
4627
4628                         fill_from_file_info($diff, @parents)
4629                                 unless exists $diff->{'from_file'};
4630
4631                         if (!is_deleted($diff)) {
4632                                 # file exists in the result (child) commit
4633                                 print "<td>" .
4634                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4635                                                              file_name=>$diff->{'to_file'},
4636                                                              hash_base=>$hash),
4637                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4638                                       "</td>\n";
4639                         } else {
4640                                 print "<td>" .
4641                                       esc_path($diff->{'to_file'}) .
4642                                       "</td>\n";
4643                         }
4644
4645                         if ($action eq 'commitdiff') {
4646                                 # link to patch
4647                                 $patchno++;
4648                                 print "<td class=\"link\">" .
4649                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4650                                               "patch") .
4651                                       " | " .
4652                                       "</td>\n";
4653                         }
4654
4655                         my $has_history = 0;
4656                         my $not_deleted = 0;
4657                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4658                                 my $hash_parent = $parents[$i];
4659                                 my $from_hash = $diff->{'from_id'}[$i];
4660                                 my $from_path = $diff->{'from_file'}[$i];
4661                                 my $status = $diff->{'status'}[$i];
4662
4663                                 $has_history ||= ($status ne 'A');
4664                                 $not_deleted ||= ($status ne 'D');
4665
4666                                 if ($status eq 'A') {
4667                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4668                                 } elsif ($status eq 'D') {
4669                                         print "<td class=\"link\">" .
4670                                               $cgi->a({-href => href(action=>"blob",
4671                                                                      hash_base=>$hash,
4672                                                                      hash=>$from_hash,
4673                                                                      file_name=>$from_path)},
4674                                                       "blob" . ($i+1)) .
4675                                               " | </td>\n";
4676                                 } else {
4677                                         if ($diff->{'to_id'} eq $from_hash) {
4678                                                 print "<td class=\"link nochange\">";
4679                                         } else {
4680                                                 print "<td class=\"link\">";
4681                                         }
4682                                         print $cgi->a({-href => href(action=>"blobdiff",
4683                                                                      hash=>$diff->{'to_id'},
4684                                                                      hash_parent=>$from_hash,
4685                                                                      hash_base=>$hash,
4686                                                                      hash_parent_base=>$hash_parent,
4687                                                                      file_name=>$diff->{'to_file'},
4688                                                                      file_parent=>$from_path)},
4689                                                       "diff" . ($i+1)) .
4690                                               " | </td>\n";
4691                                 }
4692                         }
4693
4694                         print "<td class=\"link\">";
4695                         if ($not_deleted) {
4696                                 print $cgi->a({-href => href(action=>"blob",
4697                                                              hash=>$diff->{'to_id'},
4698                                                              file_name=>$diff->{'to_file'},
4699                                                              hash_base=>$hash)},
4700                                               "blob");
4701                                 print " | " if ($has_history);
4702                         }
4703                         if ($has_history) {
4704                                 print $cgi->a({-href => href(action=>"history",
4705                                                              file_name=>$diff->{'to_file'},
4706                                                              hash_base=>$hash)},
4707                                               "history");
4708                         }
4709                         print "</td>\n";
4710
4711                         print "</tr>\n";
4712                         next; # instead of 'else' clause, to avoid extra indent
4713                 }
4714                 # else ordinary diff
4715
4716                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4717                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4718                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4719                         $to_mode_oct = oct $diff->{'to_mode'};
4720                         if (S_ISREG($to_mode_oct)) { # only for regular file
4721                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4722                         }
4723                         $to_file_type = file_type($diff->{'to_mode'});
4724                 }
4725                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4726                         $from_mode_oct = oct $diff->{'from_mode'};
4727                         if (S_ISREG($from_mode_oct)) { # only for regular file
4728                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4729                         }
4730                         $from_file_type = file_type($diff->{'from_mode'});
4731                 }
4732
4733                 if ($diff->{'status'} eq "A") { # created
4734                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4735                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4736                         $mode_chng   .= "]</span>";
4737                         print "<td>";
4738                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4739                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4740                                       -class => "list"}, esc_path($diff->{'file'}));
4741                         print "</td>\n";
4742                         print "<td>$mode_chng</td>\n";
4743                         print "<td class=\"link\">";
4744                         if ($action eq 'commitdiff') {
4745                                 # link to patch
4746                                 $patchno++;
4747                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4748                                               "patch") .
4749                                       " | ";
4750                         }
4751                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4752                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4753                                       "blob");
4754                         print "</td>\n";
4755
4756                 } elsif ($diff->{'status'} eq "D") { # deleted
4757                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4758                         print "<td>";
4759                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4760                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4761                                        -class => "list"}, esc_path($diff->{'file'}));
4762                         print "</td>\n";
4763                         print "<td>$mode_chng</td>\n";
4764                         print "<td class=\"link\">";
4765                         if ($action eq 'commitdiff') {
4766                                 # link to patch
4767                                 $patchno++;
4768                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4769                                               "patch") .
4770                                       " | ";
4771                         }
4772                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4773                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4774                                       "blob") . " | ";
4775                         if ($have_blame) {
4776                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4777                                                              file_name=>$diff->{'file'})},
4778                                               "blame") . " | ";
4779                         }
4780                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4781                                                      file_name=>$diff->{'file'})},
4782                                       "history");
4783                         print "</td>\n";
4784
4785                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4786                         my $mode_chnge = "";
4787                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4788                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4789                                 if ($from_file_type ne $to_file_type) {
4790                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4791                                 }
4792                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4793                                         if ($from_mode_str && $to_mode_str) {
4794                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4795                                         } elsif ($to_mode_str) {
4796                                                 $mode_chnge .= " mode: $to_mode_str";
4797                                         }
4798                                 }
4799                                 $mode_chnge .= "]</span>\n";
4800                         }
4801                         print "<td>";
4802                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4803                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4804                                       -class => "list"}, esc_path($diff->{'file'}));
4805                         print "</td>\n";
4806                         print "<td>$mode_chnge</td>\n";
4807                         print "<td class=\"link\">";
4808                         if ($action eq 'commitdiff') {
4809                                 # link to patch
4810                                 $patchno++;
4811                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4812                                               "patch") .
4813                                       " | ";
4814                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4815                                 # "commit" view and modified file (not onlu mode changed)
4816                                 print $cgi->a({-href => href(action=>"blobdiff",
4817                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4818                                                              hash_base=>$hash, hash_parent_base=>$parent,
4819                                                              file_name=>$diff->{'file'})},
4820                                               "diff") .
4821                                       " | ";
4822                         }
4823                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4824                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4825                                        "blob") . " | ";
4826                         if ($have_blame) {
4827                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4828                                                              file_name=>$diff->{'file'})},
4829                                               "blame") . " | ";
4830                         }
4831                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4832                                                      file_name=>$diff->{'file'})},
4833                                       "history");
4834                         print "</td>\n";
4835
4836                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4837                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4838                         my $nstatus = $status_name{$diff->{'status'}};
4839                         my $mode_chng = "";
4840                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4841                                 # mode also for directories, so we cannot use $to_mode_str
4842                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4843                         }
4844                         print "<td>" .
4845                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4846                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4847                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4848                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4849                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4850                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4851                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4852                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4853                               "<td class=\"link\">";
4854                         if ($action eq 'commitdiff') {
4855                                 # link to patch
4856                                 $patchno++;
4857                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4858                                               "patch") .
4859                                       " | ";
4860                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4861                                 # "commit" view and modified file (not only pure rename or copy)
4862                                 print $cgi->a({-href => href(action=>"blobdiff",
4863                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4864                                                              hash_base=>$hash, hash_parent_base=>$parent,
4865                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4866                                               "diff") .
4867                                       " | ";
4868                         }
4869                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4870                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4871                                       "blob") . " | ";
4872                         if ($have_blame) {
4873                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4874                                                              file_name=>$diff->{'to_file'})},
4875                                               "blame") . " | ";
4876                         }
4877                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4878                                                     file_name=>$diff->{'to_file'})},
4879                                       "history");
4880                         print "</td>\n";
4881
4882                 } # we should not encounter Unmerged (U) or Unknown (X) status
4883                 print "</tr>\n";
4884         }
4885         print "</tbody>" if $has_header;
4886         print "</table>\n";
4887 }
4888
4889 sub print_sidebyside_diff_chunk {
4890         my @chunk = @_;
4891         my (@ctx, @rem, @add);
4892
4893         return unless @chunk;
4894
4895         # incomplete last line might be among removed or added lines,
4896         # or both, or among context lines: find which
4897         for (my $i = 1; $i < @chunk; $i++) {
4898                 if ($chunk[$i][0] eq 'incomplete') {
4899                         $chunk[$i][0] = $chunk[$i-1][0];
4900                 }
4901         }
4902
4903         # guardian
4904         push @chunk, ["", ""];
4905
4906         foreach my $line_info (@chunk) {
4907                 my ($class, $line) = @$line_info;
4908
4909                 # print chunk headers
4910                 if ($class && $class eq 'chunk_header') {
4911                         print $line;
4912                         next;
4913                 }
4914
4915                 ## print from accumulator when type of class of lines change
4916                 # empty contents block on start rem/add block, or end of chunk
4917                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4918                         print join '',
4919                                 '<div class="chunk_block ctx">',
4920                                         '<div class="old">',
4921                                         @ctx,
4922                                         '</div>',
4923                                         '<div class="new">',
4924                                         @ctx,
4925                                         '</div>',
4926                                 '</div>';
4927                         @ctx = ();
4928                 }
4929                 # empty add/rem block on start context block, or end of chunk
4930                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4931                         if (!@add) {
4932                                 # pure removal
4933                                 print join '',
4934                                         '<div class="chunk_block rem">',
4935                                                 '<div class="old">',
4936                                                 @rem,
4937                                                 '</div>',
4938                                         '</div>';
4939                         } elsif (!@rem) {
4940                                 # pure addition
4941                                 print join '',
4942                                         '<div class="chunk_block add">',
4943                                                 '<div class="new">',
4944                                                 @add,
4945                                                 '</div>',
4946                                         '</div>';
4947                         } else {
4948                                 # assume that it is change
4949                                 print join '',
4950                                         '<div class="chunk_block chg">',
4951                                                 '<div class="old">',
4952                                                 @rem,
4953                                                 '</div>',
4954                                                 '<div class="new">',
4955                                                 @add,
4956                                                 '</div>',
4957                                         '</div>';
4958                         }
4959                         @rem = @add = ();
4960                 }
4961
4962                 ## adding lines to accumulator
4963                 # guardian value
4964                 last unless $line;
4965                 # rem, add or change
4966                 if ($class eq 'rem') {
4967                         push @rem, $line;
4968                 } elsif ($class eq 'add') {
4969                         push @add, $line;
4970                 }
4971                 # context line
4972                 if ($class eq 'ctx') {
4973                         push @ctx, $line;
4974                 }
4975         }
4976 }
4977
4978 sub git_patchset_body {
4979         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4980         my ($hash_parent) = $hash_parents[0];
4981
4982         my $is_combined = (@hash_parents > 1);
4983         my $patch_idx = 0;
4984         my $patch_number = 0;
4985         my $patch_line;
4986         my $diffinfo;
4987         my $to_name;
4988         my (%from, %to);
4989         my @chunk; # for side-by-side diff
4990
4991         print "<div class=\"patchset\">\n";
4992
4993         # skip to first patch
4994         while ($patch_line = <$fd>) {
4995                 chomp $patch_line;
4996
4997                 last if ($patch_line =~ m/^diff /);
4998         }
4999
5000  PATCH:
5001         while ($patch_line) {
5002
5003                 # parse "git diff" header line
5004                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5005                         # $1 is from_name, which we do not use
5006                         $to_name = unquote($2);
5007                         $to_name =~ s!^b/!!;
5008                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5009                         # $1 is 'cc' or 'combined', which we do not use
5010                         $to_name = unquote($2);
5011                 } else {
5012                         $to_name = undef;
5013                 }
5014
5015                 # check if current patch belong to current raw line
5016                 # and parse raw git-diff line if needed
5017                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5018                         # this is continuation of a split patch
5019                         print "<div class=\"patch cont\">\n";
5020                 } else {
5021                         # advance raw git-diff output if needed
5022                         $patch_idx++ if defined $diffinfo;
5023
5024                         # read and prepare patch information
5025                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5026
5027                         # compact combined diff output can have some patches skipped
5028                         # find which patch (using pathname of result) we are at now;
5029                         if ($is_combined) {
5030                                 while ($to_name ne $diffinfo->{'to_file'}) {
5031                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5032                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5033                                               "</div>\n";  # class="patch"
5034
5035                                         $patch_idx++;
5036                                         $patch_number++;
5037
5038                                         last if $patch_idx > $#$difftree;
5039                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5040                                 }
5041                         }
5042
5043                         # modifies %from, %to hashes
5044                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5045
5046                         # this is first patch for raw difftree line with $patch_idx index
5047                         # we index @$difftree array from 0, but number patches from 1
5048                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5049                 }
5050
5051                 # git diff header
5052                 #assert($patch_line =~ m/^diff /) if DEBUG;
5053                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5054                 $patch_number++;
5055                 # print "git diff" header
5056                 print format_git_diff_header_line($patch_line, $diffinfo,
5057                                                   \%from, \%to);
5058
5059                 # print extended diff header
5060                 print "<div class=\"diff extended_header\">\n";
5061         EXTENDED_HEADER:
5062                 while ($patch_line = <$fd>) {
5063                         chomp $patch_line;
5064
5065                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5066
5067                         print format_extended_diff_header_line($patch_line, $diffinfo,
5068                                                                \%from, \%to);
5069                 }
5070                 print "</div>\n"; # class="diff extended_header"
5071
5072                 # from-file/to-file diff header
5073                 if (! $patch_line) {
5074                         print "</div>\n"; # class="patch"
5075                         last PATCH;
5076                 }
5077                 next PATCH if ($patch_line =~ m/^diff /);
5078                 #assert($patch_line =~ m/^---/) if DEBUG;
5079
5080                 my $last_patch_line = $patch_line;
5081                 $patch_line = <$fd>;
5082                 chomp $patch_line;
5083                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5084
5085                 print format_diff_from_to_header($last_patch_line, $patch_line,
5086                                                  $diffinfo, \%from, \%to,
5087                                                  @hash_parents);
5088
5089                 # the patch itself
5090         LINE:
5091                 while ($patch_line = <$fd>) {
5092                         chomp $patch_line;
5093
5094                         next PATCH if ($patch_line =~ m/^diff /);
5095
5096                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5097                         my $diff_classes = "diff";
5098                         $diff_classes .= " $class" if ($class);
5099                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5100
5101                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5102                                 if ($class eq 'chunk_header') {
5103                                         print_sidebyside_diff_chunk(@chunk);
5104                                         @chunk = ( [ $class, $line ] );
5105                                 } else {
5106                                         push @chunk, [ $class, $line ];
5107                                 }
5108                         } else {
5109                                 # default 'inline' style and unknown styles
5110                                 print $line;
5111                         }
5112                 }
5113
5114         } continue {
5115                 if (@chunk) {
5116                         print_sidebyside_diff_chunk(@chunk);
5117                         @chunk = ();
5118                 }
5119                 print "</div>\n"; # class="patch"
5120         }
5121
5122         # for compact combined (--cc) format, with chunk and patch simplification
5123         # the patchset might be empty, but there might be unprocessed raw lines
5124         for (++$patch_idx if $patch_number > 0;
5125              $patch_idx < @$difftree;
5126              ++$patch_idx) {
5127                 # read and prepare patch information
5128                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5129
5130                 # generate anchor for "patch" links in difftree / whatchanged part
5131                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5132                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5133                       "</div>\n";  # class="patch"
5134
5135                 $patch_number++;
5136         }
5137
5138         if ($patch_number == 0) {
5139                 if (@hash_parents > 1) {
5140                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5141                 } else {
5142                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5143                 }
5144         }
5145
5146         print "</div>\n"; # class="patchset"
5147 }
5148
5149 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5150
5151 # fills project list info (age, description, owner, category, forks)
5152 # for each project in the list, removing invalid projects from
5153 # returned list
5154 # NOTE: modifies $projlist, but does not remove entries from it
5155 sub fill_project_list_info {
5156         my $projlist = shift;
5157         my @projects;
5158
5159         my $show_ctags = gitweb_check_feature('ctags');
5160  PROJECT:
5161         foreach my $pr (@$projlist) {
5162                 my (@activity) = git_get_last_activity($pr->{'path'});
5163                 unless (@activity) {
5164                         next PROJECT;
5165                 }
5166                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5167                 if (!defined $pr->{'descr'}) {
5168                         my $descr = git_get_project_description($pr->{'path'}) || "";
5169                         $descr = to_utf8($descr);
5170                         $pr->{'descr_long'} = $descr;
5171                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5172                 }
5173                 if (!defined $pr->{'owner'}) {
5174                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5175                 }
5176                 if ($show_ctags) {
5177                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5178                 }
5179                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5180                         my $cat = git_get_project_category($pr->{'path'}) ||
5181                                                            $project_list_default_category;
5182                         $pr->{'category'} = to_utf8($cat);
5183                 }
5184
5185                 push @projects, $pr;
5186         }
5187
5188         return @projects;
5189 }
5190
5191 sub sort_projects_list {
5192         my ($projlist, $order) = @_;
5193         my @projects;
5194
5195         my %order_info = (
5196                 project => { key => 'path', type => 'str' },
5197                 descr => { key => 'descr_long', type => 'str' },
5198                 owner => { key => 'owner', type => 'str' },
5199                 age => { key => 'age', type => 'num' }
5200         );
5201         my $oi = $order_info{$order};
5202         return @$projlist unless defined $oi;
5203         if ($oi->{'type'} eq 'str') {
5204                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5205         } else {
5206                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5207         }
5208
5209         return @projects;
5210 }
5211
5212 # returns a hash of categories, containing the list of project
5213 # belonging to each category
5214 sub build_projlist_by_category {
5215         my ($projlist, $from, $to) = @_;
5216         my %categories;
5217
5218         $from = 0 unless defined $from;
5219         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5220
5221         for (my $i = $from; $i <= $to; $i++) {
5222                 my $pr = $projlist->[$i];
5223                 push @{$categories{ $pr->{'category'} }}, $pr;
5224         }
5225
5226         return wantarray ? %categories : \%categories;
5227 }
5228
5229 # print 'sort by' <th> element, generating 'sort by $name' replay link
5230 # if that order is not selected
5231 sub print_sort_th {
5232         print format_sort_th(@_);
5233 }
5234
5235 sub format_sort_th {
5236         my ($name, $order, $header) = @_;
5237         my $sort_th = "";
5238         $header ||= ucfirst($name);
5239
5240         if ($order eq $name) {
5241                 $sort_th .= "<th>$header</th>\n";
5242         } else {
5243                 $sort_th .= "<th>" .
5244                             $cgi->a({-href => href(-replay=>1, order=>$name),
5245                                      -class => "header"}, $header) .
5246                             "</th>\n";
5247         }
5248
5249         return $sort_th;
5250 }
5251
5252 sub git_project_list_rows {
5253         my ($projlist, $from, $to, $check_forks) = @_;
5254
5255         $from = 0 unless defined $from;
5256         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5257
5258         my $alternate = 1;
5259         for (my $i = $from; $i <= $to; $i++) {
5260                 my $pr = $projlist->[$i];
5261
5262                 if ($alternate) {
5263                         print "<tr class=\"dark\">\n";
5264                 } else {
5265                         print "<tr class=\"light\">\n";
5266                 }
5267                 $alternate ^= 1;
5268
5269                 if ($check_forks) {
5270                         print "<td>";
5271                         if ($pr->{'forks'}) {
5272                                 my $nforks = scalar @{$pr->{'forks'}};
5273                                 if ($nforks > 0) {
5274                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5275                                                        -title => "$nforks forks"}, "+");
5276                                 } else {
5277                                         print $cgi->span({-title => "$nforks forks"}, "+");
5278                                 }
5279                         }
5280                         print "</td>\n";
5281                 }
5282                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5283                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5284                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5285                                         -class => "list", -title => $pr->{'descr_long'}},
5286                                         esc_html($pr->{'descr'})) . "</td>\n" .
5287                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5288                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5289                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5290                       "<td class=\"link\">" .
5291                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5292                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5293                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5294                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5295                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5296                       "</td>\n" .
5297                       "</tr>\n";
5298         }
5299 }
5300
5301 sub git_project_list_body {
5302         # actually uses global variable $project
5303         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5304         my @projects = @$projlist;
5305
5306         my $check_forks = gitweb_check_feature('forks');
5307         my $show_ctags  = gitweb_check_feature('ctags');
5308         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5309         $check_forks = undef
5310                 if ($tagfilter || $searchtext);
5311
5312         # filtering out forks before filling info allows to do less work
5313         @projects = filter_forks_from_projects_list(\@projects)
5314                 if ($check_forks);
5315         @projects = fill_project_list_info(\@projects);
5316         # searching projects require filling to be run before it
5317         @projects = search_projects_list(\@projects,
5318                                          'searchtext' => $searchtext,
5319                                          'tagfilter'  => $tagfilter)
5320                 if ($tagfilter || $searchtext);
5321
5322         $order ||= $default_projects_order;
5323         $from = 0 unless defined $from;
5324         $to = $#projects if (!defined $to || $#projects < $to);
5325
5326         # short circuit
5327         if ($from > $to) {
5328                 print "<center>\n".
5329                       "<b>No such projects found</b><br />\n".
5330                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5331                       "</center>\n<br />\n";
5332                 return;
5333         }
5334
5335         @projects = sort_projects_list(\@projects, $order);
5336
5337         if ($show_ctags) {
5338                 my $ctags = git_gather_all_ctags(\@projects);
5339                 my $cloud = git_populate_project_tagcloud($ctags);
5340                 print git_show_project_tagcloud($cloud, 64);
5341         }
5342
5343         print "<table class=\"project_list\">\n";
5344         unless ($no_header) {
5345                 print "<tr>\n";
5346                 if ($check_forks) {
5347                         print "<th></th>\n";
5348                 }
5349                 print_sort_th('project', $order, 'Project');
5350                 print_sort_th('descr', $order, 'Description');
5351                 print_sort_th('owner', $order, 'Owner');
5352                 print_sort_th('age', $order, 'Last Change');
5353                 print "<th></th>\n" . # for links
5354                       "</tr>\n";
5355         }
5356
5357         if ($projects_list_group_categories) {
5358                 # only display categories with projects in the $from-$to window
5359                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5360                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5361                 foreach my $cat (sort keys %categories) {
5362                         unless ($cat eq "") {
5363                                 print "<tr>\n";
5364                                 if ($check_forks) {
5365                                         print "<td></td>\n";
5366                                 }
5367                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5368                                 print "</tr>\n";
5369                         }
5370
5371                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5372                 }
5373         } else {
5374                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5375         }
5376
5377         if (defined $extra) {
5378                 print "<tr>\n";
5379                 if ($check_forks) {
5380                         print "<td></td>\n";
5381                 }
5382                 print "<td colspan=\"5\">$extra</td>\n" .
5383                       "</tr>\n";
5384         }
5385         print "</table>\n";
5386 }
5387
5388 sub git_log_body {
5389         # uses global variable $project
5390         my ($commitlist, $from, $to, $refs, $extra) = @_;
5391
5392         $from = 0 unless defined $from;
5393         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5394
5395         for (my $i = 0; $i <= $to; $i++) {
5396                 my %co = %{$commitlist->[$i]};
5397                 next if !%co;
5398                 my $commit = $co{'id'};
5399                 my $ref = format_ref_marker($refs, $commit);
5400                 git_print_header_div('commit',
5401                                "<span class=\"age\">$co{'age_string'}</span>" .
5402                                esc_html($co{'title'}) . $ref,
5403                                $commit);
5404                 print "<div class=\"title_text\">\n" .
5405                       "<div class=\"log_link\">\n" .
5406                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5407                       " | " .
5408                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5409                       " | " .
5410                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5411                       "<br/>\n" .
5412                       "</div>\n";
5413                       git_print_authorship(\%co, -tag => 'span');
5414                       print "<br/>\n</div>\n";
5415
5416                 print "<div class=\"log_body\">\n";
5417                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5418                 print "</div>\n";
5419         }
5420         if ($extra) {
5421                 print "<div class=\"page_nav\">\n";
5422                 print "$extra\n";
5423                 print "</div>\n";
5424         }
5425 }
5426
5427 sub git_shortlog_body {
5428         # uses global variable $project
5429         my ($commitlist, $from, $to, $refs, $extra) = @_;
5430
5431         $from = 0 unless defined $from;
5432         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5433
5434         print "<table class=\"shortlog\">\n";
5435         my $alternate = 1;
5436         for (my $i = $from; $i <= $to; $i++) {
5437                 my %co = %{$commitlist->[$i]};
5438                 my $commit = $co{'id'};
5439                 my $ref = format_ref_marker($refs, $commit);
5440                 if ($alternate) {
5441                         print "<tr class=\"dark\">\n";
5442                 } else {
5443                         print "<tr class=\"light\">\n";
5444                 }
5445                 $alternate ^= 1;
5446                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5447                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5448                       format_author_html('td', \%co, 10) . "<td>";
5449                 print format_subject_html($co{'title'}, $co{'title_short'},
5450                                           href(action=>"commit", hash=>$commit), $ref);
5451                 print "</td>\n" .
5452                       "<td class=\"link\">" .
5453                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5454                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5455                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5456                 my $snapshot_links = format_snapshot_links($commit);
5457                 if (defined $snapshot_links) {
5458                         print " | " . $snapshot_links;
5459                 }
5460                 print "</td>\n" .
5461                       "</tr>\n";
5462         }
5463         if (defined $extra) {
5464                 print "<tr>\n" .
5465                       "<td colspan=\"4\">$extra</td>\n" .
5466                       "</tr>\n";
5467         }
5468         print "</table>\n";
5469 }
5470
5471 sub git_history_body {
5472         # Warning: assumes constant type (blob or tree) during history
5473         my ($commitlist, $from, $to, $refs, $extra,
5474             $file_name, $file_hash, $ftype) = @_;
5475
5476         $from = 0 unless defined $from;
5477         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5478
5479         print "<table class=\"history\">\n";
5480         my $alternate = 1;
5481         for (my $i = $from; $i <= $to; $i++) {
5482                 my %co = %{$commitlist->[$i]};
5483                 if (!%co) {
5484                         next;
5485                 }
5486                 my $commit = $co{'id'};
5487
5488                 my $ref = format_ref_marker($refs, $commit);
5489
5490                 if ($alternate) {
5491                         print "<tr class=\"dark\">\n";
5492                 } else {
5493                         print "<tr class=\"light\">\n";
5494                 }
5495                 $alternate ^= 1;
5496                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5497         # shortlog:   format_author_html('td', \%co, 10)
5498                       format_author_html('td', \%co, 15, 3) . "<td>";
5499                 # originally git_history used chop_str($co{'title'}, 50)
5500                 print format_subject_html($co{'title'}, $co{'title_short'},
5501                                           href(action=>"commit", hash=>$commit), $ref);
5502                 print "</td>\n" .
5503                       "<td class=\"link\">" .
5504                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5505                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5506
5507                 if ($ftype eq 'blob') {
5508                         my $blob_current = $file_hash;
5509                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5510                         if (defined $blob_current && defined $blob_parent &&
5511                                         $blob_current ne $blob_parent) {
5512                                 print " | " .
5513                                         $cgi->a({-href => href(action=>"blobdiff",
5514                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5515                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5516                                                                file_name=>$file_name)},
5517                                                 "diff to current");
5518                         }
5519                 }
5520                 print "</td>\n" .
5521                       "</tr>\n";
5522         }
5523         if (defined $extra) {
5524                 print "<tr>\n" .
5525                       "<td colspan=\"4\">$extra</td>\n" .
5526                       "</tr>\n";
5527         }
5528         print "</table>\n";
5529 }
5530
5531 sub git_tags_body {
5532         # uses global variable $project
5533         my ($taglist, $from, $to, $extra) = @_;
5534         $from = 0 unless defined $from;
5535         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5536
5537         print "<table class=\"tags\">\n";
5538         my $alternate = 1;
5539         for (my $i = $from; $i <= $to; $i++) {
5540                 my $entry = $taglist->[$i];
5541                 my %tag = %$entry;
5542                 my $comment = $tag{'subject'};
5543                 my $comment_short;
5544                 if (defined $comment) {
5545                         $comment_short = chop_str($comment, 30, 5);
5546                 }
5547                 if ($alternate) {
5548                         print "<tr class=\"dark\">\n";
5549                 } else {
5550                         print "<tr class=\"light\">\n";
5551                 }
5552                 $alternate ^= 1;
5553                 if (defined $tag{'age'}) {
5554                         print "<td><i>$tag{'age'}</i></td>\n";
5555                 } else {
5556                         print "<td></td>\n";
5557                 }
5558                 print "<td>" .
5559                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5560                                -class => "list name"}, esc_html($tag{'name'})) .
5561                       "</td>\n" .
5562                       "<td>";
5563                 if (defined $comment) {
5564                         print format_subject_html($comment, $comment_short,
5565                                                   href(action=>"tag", hash=>$tag{'id'}));
5566                 }
5567                 print "</td>\n" .
5568                       "<td class=\"selflink\">";
5569                 if ($tag{'type'} eq "tag") {
5570                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5571                 } else {
5572                         print "&nbsp;";
5573                 }
5574                 print "</td>\n" .
5575                       "<td class=\"link\">" . " | " .
5576                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5577                 if ($tag{'reftype'} eq "commit") {
5578                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5579                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5580                 } elsif ($tag{'reftype'} eq "blob") {
5581                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5582                 }
5583                 print "</td>\n" .
5584                       "</tr>";
5585         }
5586         if (defined $extra) {
5587                 print "<tr>\n" .
5588                       "<td colspan=\"5\">$extra</td>\n" .
5589                       "</tr>\n";
5590         }
5591         print "</table>\n";
5592 }
5593
5594 sub git_heads_body {
5595         # uses global variable $project
5596         my ($headlist, $head, $from, $to, $extra) = @_;
5597         $from = 0 unless defined $from;
5598         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5599
5600         print "<table class=\"heads\">\n";
5601         my $alternate = 1;
5602         for (my $i = $from; $i <= $to; $i++) {
5603                 my $entry = $headlist->[$i];
5604                 my %ref = %$entry;
5605                 my $curr = $ref{'id'} eq $head;
5606                 if ($alternate) {
5607                         print "<tr class=\"dark\">\n";
5608                 } else {
5609                         print "<tr class=\"light\">\n";
5610                 }
5611                 $alternate ^= 1;
5612                 print "<td><i>$ref{'age'}</i></td>\n" .
5613                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5614                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5615                                -class => "list name"},esc_html($ref{'name'})) .
5616                       "</td>\n" .
5617                       "<td class=\"link\">" .
5618                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5619                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5620                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5621                       "</td>\n" .
5622                       "</tr>";
5623         }
5624         if (defined $extra) {
5625                 print "<tr>\n" .
5626                       "<td colspan=\"3\">$extra</td>\n" .
5627                       "</tr>\n";
5628         }
5629         print "</table>\n";
5630 }
5631
5632 # Display a single remote block
5633 sub git_remote_block {
5634         my ($remote, $rdata, $limit, $head) = @_;
5635
5636         my $heads = $rdata->{'heads'};
5637         my $fetch = $rdata->{'fetch'};
5638         my $push = $rdata->{'push'};
5639
5640         my $urls_table = "<table class=\"projects_list\">\n" ;
5641
5642         if (defined $fetch) {
5643                 if ($fetch eq $push) {
5644                         $urls_table .= format_repo_url("URL", $fetch);
5645                 } else {
5646                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5647                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5648                 }
5649         } elsif (defined $push) {
5650                 $urls_table .= format_repo_url("Push URL", $push);
5651         } else {
5652                 $urls_table .= format_repo_url("", "No remote URL");
5653         }
5654
5655         $urls_table .= "</table>\n";
5656
5657         my $dots;
5658         if (defined $limit && $limit < @$heads) {
5659                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5660         }
5661
5662         print $urls_table;
5663         git_heads_body($heads, $head, 0, $limit, $dots);
5664 }
5665
5666 # Display a list of remote names with the respective fetch and push URLs
5667 sub git_remotes_list {
5668         my ($remotedata, $limit) = @_;
5669         print "<table class=\"heads\">\n";
5670         my $alternate = 1;
5671         my @remotes = sort keys %$remotedata;
5672
5673         my $limited = $limit && $limit < @remotes;
5674
5675         $#remotes = $limit - 1 if $limited;
5676
5677         while (my $remote = shift @remotes) {
5678                 my $rdata = $remotedata->{$remote};
5679                 my $fetch = $rdata->{'fetch'};
5680                 my $push = $rdata->{'push'};
5681                 if ($alternate) {
5682                         print "<tr class=\"dark\">\n";
5683                 } else {
5684                         print "<tr class=\"light\">\n";
5685                 }
5686                 $alternate ^= 1;
5687                 print "<td>" .
5688                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5689                                -class=> "list name"},esc_html($remote)) .
5690                       "</td>";
5691                 print "<td class=\"link\">" .
5692                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5693                       " | " .
5694                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5695                       "</td>";
5696
5697                 print "</tr>\n";
5698         }
5699
5700         if ($limited) {
5701                 print "<tr>\n" .
5702                       "<td colspan=\"3\">" .
5703                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5704                       "</td>\n" . "</tr>\n";
5705         }
5706
5707         print "</table>";
5708 }
5709
5710 # Display remote heads grouped by remote, unless there are too many
5711 # remotes, in which case we only display the remote names
5712 sub git_remotes_body {
5713         my ($remotedata, $limit, $head) = @_;
5714         if ($limit and $limit < keys %$remotedata) {
5715                 git_remotes_list($remotedata, $limit);
5716         } else {
5717                 fill_remote_heads($remotedata);
5718                 while (my ($remote, $rdata) = each %$remotedata) {
5719                         git_print_section({-class=>"remote", -id=>$remote},
5720                                 ["remotes", $remote, $remote], sub {
5721                                         git_remote_block($remote, $rdata, $limit, $head);
5722                                 });
5723                 }
5724         }
5725 }
5726
5727 sub git_search_message {
5728         my %co = @_;
5729
5730         my $greptype;
5731         if ($searchtype eq 'commit') {
5732                 $greptype = "--grep=";
5733         } elsif ($searchtype eq 'author') {
5734                 $greptype = "--author=";
5735         } elsif ($searchtype eq 'committer') {
5736                 $greptype = "--committer=";
5737         }
5738         $greptype .= $searchtext;
5739         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5740                                        $greptype, '--regexp-ignore-case',
5741                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5742
5743         my $paging_nav = '';
5744         if ($page > 0) {
5745                 $paging_nav .=
5746                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5747                                 "first") .
5748                         " &sdot; " .
5749                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5750                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5751         } else {
5752                 $paging_nav .= "first &sdot; prev";
5753         }
5754         my $next_link = '';
5755         if ($#commitlist >= 100) {
5756                 $next_link =
5757                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5758                                  -accesskey => "n", -title => "Alt-n"}, "next");
5759                 $paging_nav .= " &sdot; $next_link";
5760         } else {
5761                 $paging_nav .= " &sdot; next";
5762         }
5763
5764         git_header_html();
5765
5766         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5767         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5768         if ($page == 0 && !@commitlist) {
5769                 print "<p>No match.</p>\n";
5770         } else {
5771                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5772         }
5773
5774         git_footer_html();
5775 }
5776
5777 sub git_search_changes {
5778         my %co = @_;
5779
5780         local $/ = "\n";
5781         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5782                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5783                 ($search_use_regexp ? '--pickaxe-regex' : ())
5784                         or die_error(500, "Open git-log failed");
5785
5786         git_header_html();
5787
5788         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5789         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5790
5791         print "<table class=\"pickaxe search\">\n";
5792         my $alternate = 1;
5793         undef %co;
5794         my @files;
5795         while (my $line = <$fd>) {
5796                 chomp $line;
5797                 next unless $line;
5798
5799                 my %set = parse_difftree_raw_line($line);
5800                 if (defined $set{'commit'}) {
5801                         # finish previous commit
5802                         if (%co) {
5803                                 print "</td>\n" .
5804                                       "<td class=\"link\">" .
5805                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5806                                               "commit") .
5807                                       " | " .
5808                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5809                                                              hash_base=>$co{'id'})},
5810                                               "tree") .
5811                                       "</td>\n" .
5812                                       "</tr>\n";
5813                         }
5814
5815                         if ($alternate) {
5816                                 print "<tr class=\"dark\">\n";
5817                         } else {
5818                                 print "<tr class=\"light\">\n";
5819                         }
5820                         $alternate ^= 1;
5821                         %co = parse_commit($set{'commit'});
5822                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5823                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5824                               "<td><i>$author</i></td>\n" .
5825                               "<td>" .
5826                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5827                                       -class => "list subject"},
5828                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5829                 } elsif (defined $set{'to_id'}) {
5830                         next if ($set{'to_id'} =~ m/^0{40}$/);
5831
5832                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5833                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5834                                       -class => "list"},
5835                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5836                               "<br/>\n";
5837                 }
5838         }
5839         close $fd;
5840
5841         # finish last commit (warning: repetition!)
5842         if (%co) {
5843                 print "</td>\n" .
5844                       "<td class=\"link\">" .
5845                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5846                               "commit") .
5847                       " | " .
5848                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5849                                              hash_base=>$co{'id'})},
5850                               "tree") .
5851                       "</td>\n" .
5852                       "</tr>\n";
5853         }
5854
5855         print "</table>\n";
5856
5857         git_footer_html();
5858 }
5859
5860 sub git_search_files {
5861         my %co = @_;
5862
5863         local $/ = "\n";
5864         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5865                 $search_use_regexp ? ('-E', '-i') : '-F',
5866                 $searchtext, $co{'tree'}
5867                         or die_error(500, "Open git-grep failed");
5868
5869         git_header_html();
5870
5871         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5872         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5873
5874         print "<table class=\"grep_search\">\n";
5875         my $alternate = 1;
5876         my $matches = 0;
5877         my $lastfile = '';
5878         while (my $line = <$fd>) {
5879                 chomp $line;
5880                 my ($file, $file_href, $lno, $ltext, $binary);
5881                 last if ($matches++ > 1000);
5882                 if ($line =~ /^Binary file (.+) matches$/) {
5883                         $file = $1;
5884                         $binary = 1;
5885                 } else {
5886                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5887                         $file =~ s/^$co{'tree'}://;
5888                 }
5889                 if ($file ne $lastfile) {
5890                         $lastfile and print "</td></tr>\n";
5891                         if ($alternate++) {
5892                                 print "<tr class=\"dark\">\n";
5893                         } else {
5894                                 print "<tr class=\"light\">\n";
5895                         }
5896                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5897                                           file_name=>$file);
5898                         print "<td class=\"list\">".
5899                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5900                         print "</td><td>\n";
5901                         $lastfile = $file;
5902                 }
5903                 if ($binary) {
5904                         print "<div class=\"binary\">Binary file</div>\n";
5905                 } else {
5906                         $ltext = untabify($ltext);
5907                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5908                                 $ltext = esc_html($1, -nbsp=>1);
5909                                 $ltext .= '<span class="match">';
5910                                 $ltext .= esc_html($2, -nbsp=>1);
5911                                 $ltext .= '</span>';
5912                                 $ltext .= esc_html($3, -nbsp=>1);
5913                         } else {
5914                                 $ltext = esc_html($ltext, -nbsp=>1);
5915                         }
5916                         print "<div class=\"pre\">" .
5917                                 $cgi->a({-href => $file_href.'#l'.$lno,
5918                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5919                                 ' ' .  $ltext . "</div>\n";
5920                 }
5921         }
5922         if ($lastfile) {
5923                 print "</td></tr>\n";
5924                 if ($matches > 1000) {
5925                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5926                 }
5927         } else {
5928                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5929         }
5930         close $fd;
5931
5932         print "</table>\n";
5933
5934         git_footer_html();
5935 }
5936
5937 sub git_search_grep_body {
5938         my ($commitlist, $from, $to, $extra) = @_;
5939         $from = 0 unless defined $from;
5940         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5941
5942         print "<table class=\"commit_search\">\n";
5943         my $alternate = 1;
5944         for (my $i = $from; $i <= $to; $i++) {
5945                 my %co = %{$commitlist->[$i]};
5946                 if (!%co) {
5947                         next;
5948                 }
5949                 my $commit = $co{'id'};
5950                 if ($alternate) {
5951                         print "<tr class=\"dark\">\n";
5952                 } else {
5953                         print "<tr class=\"light\">\n";
5954                 }
5955                 $alternate ^= 1;
5956                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5957                       format_author_html('td', \%co, 15, 5) .
5958                       "<td>" .
5959                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5960                                -class => "list subject"},
5961                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5962                 my $comment = $co{'comment'};
5963                 foreach my $line (@$comment) {
5964                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5965                                 my ($lead, $match, $trail) = ($1, $2, $3);
5966                                 $match = chop_str($match, 70, 5, 'center');
5967                                 my $contextlen = int((80 - length($match))/2);
5968                                 $contextlen = 30 if ($contextlen > 30);
5969                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5970                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5971
5972                                 $lead  = esc_html($lead);
5973                                 $match = esc_html($match);
5974                                 $trail = esc_html($trail);
5975
5976                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5977                         }
5978                 }
5979                 print "</td>\n" .
5980                       "<td class=\"link\">" .
5981                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5982                       " | " .
5983                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5984                       " | " .
5985                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5986                 print "</td>\n" .
5987                       "</tr>\n";
5988         }
5989         if (defined $extra) {
5990                 print "<tr>\n" .
5991                       "<td colspan=\"3\">$extra</td>\n" .
5992                       "</tr>\n";
5993         }
5994         print "</table>\n";
5995 }
5996
5997 ## ======================================================================
5998 ## ======================================================================
5999 ## actions
6000
6001 sub git_project_list {
6002         my $order = $input_params{'order'};
6003         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6004                 die_error(400, "Unknown order parameter");
6005         }
6006
6007         my @list = git_get_projects_list();
6008         if (!@list) {
6009                 die_error(404, "No projects found");
6010         }
6011
6012         git_header_html();
6013         if (defined $home_text && -f $home_text) {
6014                 print "<div class=\"index_include\">\n";
6015                 insert_file($home_text);
6016                 print "</div>\n";
6017         }
6018         print $cgi->startform(-method => "get") .
6019               "<p class=\"projsearch\">Search:\n" .
6020               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6021               "</p>" .
6022               $cgi->end_form() . "\n";
6023         git_project_list_body(\@list, $order);
6024         git_footer_html();
6025 }
6026
6027 sub git_forks {
6028         my $order = $input_params{'order'};
6029         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6030                 die_error(400, "Unknown order parameter");
6031         }
6032
6033         my @list = git_get_projects_list($project);
6034         if (!@list) {
6035                 die_error(404, "No forks found");
6036         }
6037
6038         git_header_html();
6039         git_print_page_nav('','');
6040         git_print_header_div('summary', "$project forks");
6041         git_project_list_body(\@list, $order);
6042         git_footer_html();
6043 }
6044
6045 sub git_project_index {
6046         my @projects = git_get_projects_list();
6047         if (!@projects) {
6048                 die_error(404, "No projects found");
6049         }
6050
6051         print $cgi->header(
6052                 -type => 'text/plain',
6053                 -charset => 'utf-8',
6054                 -content_disposition => 'inline; filename="index.aux"');
6055
6056         foreach my $pr (@projects) {
6057                 if (!exists $pr->{'owner'}) {
6058                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6059                 }
6060
6061                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6062                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6063                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6064                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6065                 $path  =~ s/ /\+/g;
6066                 $owner =~ s/ /\+/g;
6067
6068                 print "$path $owner\n";
6069         }
6070 }
6071
6072 sub git_summary {
6073         my $descr = git_get_project_description($project) || "none";
6074         my %co = parse_commit("HEAD");
6075         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6076         my $head = $co{'id'};
6077         my $remote_heads = gitweb_check_feature('remote_heads');
6078
6079         my $owner = git_get_project_owner($project);
6080
6081         my $refs = git_get_references();
6082         # These get_*_list functions return one more to allow us to see if
6083         # there are more ...
6084         my @taglist  = git_get_tags_list(16);
6085         my @headlist = git_get_heads_list(16);
6086         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6087         my @forklist;
6088         my $check_forks = gitweb_check_feature('forks');
6089
6090         if ($check_forks) {
6091                 # find forks of a project
6092                 @forklist = git_get_projects_list($project);
6093                 # filter out forks of forks
6094                 @forklist = filter_forks_from_projects_list(\@forklist)
6095                         if (@forklist);
6096         }
6097
6098         git_header_html();
6099         git_print_page_nav('summary','', $head);
6100
6101         print "<div class=\"title\">&nbsp;</div>\n";
6102         print "<table class=\"projects_list\">\n" .
6103               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6104               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6105         if (defined $cd{'rfc2822'}) {
6106                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6107                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6108         }
6109
6110         # use per project git URL list in $projectroot/$project/cloneurl
6111         # or make project git URL from git base URL and project name
6112         my $url_tag = "URL";
6113         my @url_list = git_get_project_url_list($project);
6114         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6115         foreach my $git_url (@url_list) {
6116                 next unless $git_url;
6117                 print format_repo_url($url_tag, $git_url);
6118                 $url_tag = "";
6119         }
6120
6121         # Tag cloud
6122         my $show_ctags = gitweb_check_feature('ctags');
6123         if ($show_ctags) {
6124                 my $ctags = git_get_project_ctags($project);
6125                 if (%$ctags) {
6126                         # without ability to add tags, don't show if there are none
6127                         my $cloud = git_populate_project_tagcloud($ctags);
6128                         print "<tr id=\"metadata_ctags\">" .
6129                               "<td>content tags</td>" .
6130                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6131                               "</tr>\n";
6132                 }
6133         }
6134
6135         print "</table>\n";
6136
6137         # If XSS prevention is on, we don't include README.html.
6138         # TODO: Allow a readme in some safe format.
6139         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6140                 print "<div class=\"title\">readme</div>\n" .
6141                       "<div class=\"readme\">\n";
6142                 insert_file("$projectroot/$project/README.html");
6143                 print "\n</div>\n"; # class="readme"
6144         }
6145
6146         # we need to request one more than 16 (0..15) to check if
6147         # those 16 are all
6148         my @commitlist = $head ? parse_commits($head, 17) : ();
6149         if (@commitlist) {
6150                 git_print_header_div('shortlog');
6151                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6152                                   $#commitlist <=  15 ? undef :
6153                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6154         }
6155
6156         if (@taglist) {
6157                 git_print_header_div('tags');
6158                 git_tags_body(\@taglist, 0, 15,
6159                               $#taglist <=  15 ? undef :
6160                               $cgi->a({-href => href(action=>"tags")}, "..."));
6161         }
6162
6163         if (@headlist) {
6164                 git_print_header_div('heads');
6165                 git_heads_body(\@headlist, $head, 0, 15,
6166                                $#headlist <= 15 ? undef :
6167                                $cgi->a({-href => href(action=>"heads")}, "..."));
6168         }
6169
6170         if (%remotedata) {
6171                 git_print_header_div('remotes');
6172                 git_remotes_body(\%remotedata, 15, $head);
6173         }
6174
6175         if (@forklist) {
6176                 git_print_header_div('forks');
6177                 git_project_list_body(\@forklist, 'age', 0, 15,
6178                                       $#forklist <= 15 ? undef :
6179                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6180                                       'no_header');
6181         }
6182
6183         git_footer_html();
6184 }
6185
6186 sub git_tag {
6187         my %tag = parse_tag($hash);
6188
6189         if (! %tag) {
6190                 die_error(404, "Unknown tag object");
6191         }
6192
6193         my $head = git_get_head_hash($project);
6194         git_header_html();
6195         git_print_page_nav('','', $head,undef,$head);
6196         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6197         print "<div class=\"title_text\">\n" .
6198               "<table class=\"object_header\">\n" .
6199               "<tr>\n" .
6200               "<td>object</td>\n" .
6201               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6202                                $tag{'object'}) . "</td>\n" .
6203               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6204                                               $tag{'type'}) . "</td>\n" .
6205               "</tr>\n";
6206         if (defined($tag{'author'})) {
6207                 git_print_authorship_rows(\%tag, 'author');
6208         }
6209         print "</table>\n\n" .
6210               "</div>\n";
6211         print "<div class=\"page_body\">";
6212         my $comment = $tag{'comment'};
6213         foreach my $line (@$comment) {
6214                 chomp $line;
6215                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6216         }
6217         print "</div>\n";
6218         git_footer_html();
6219 }
6220
6221 sub git_blame_common {
6222         my $format = shift || 'porcelain';
6223         if ($format eq 'porcelain' && $cgi->param('js')) {
6224                 $format = 'incremental';
6225                 $action = 'blame_incremental'; # for page title etc
6226         }
6227
6228         # permissions
6229         gitweb_check_feature('blame')
6230                 or die_error(403, "Blame view not allowed");
6231
6232         # error checking
6233         die_error(400, "No file name given") unless $file_name;
6234         $hash_base ||= git_get_head_hash($project);
6235         die_error(404, "Couldn't find base commit") unless $hash_base;
6236         my %co = parse_commit($hash_base)
6237                 or die_error(404, "Commit not found");
6238         my $ftype = "blob";
6239         if (!defined $hash) {
6240                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6241                         or die_error(404, "Error looking up file");
6242         } else {
6243                 $ftype = git_get_type($hash);
6244                 if ($ftype !~ "blob") {
6245                         die_error(400, "Object is not a blob");
6246                 }
6247         }
6248
6249         my $fd;
6250         if ($format eq 'incremental') {
6251                 # get file contents (as base)
6252                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6253                         or die_error(500, "Open git-cat-file failed");
6254         } elsif ($format eq 'data') {
6255                 # run git-blame --incremental
6256                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6257                         $hash_base, "--", $file_name
6258                         or die_error(500, "Open git-blame --incremental failed");
6259         } else {
6260                 # run git-blame --porcelain
6261                 open $fd, "-|", git_cmd(), "blame", '-p',
6262                         $hash_base, '--', $file_name
6263                         or die_error(500, "Open git-blame --porcelain failed");
6264         }
6265
6266         # incremental blame data returns early
6267         if ($format eq 'data') {
6268                 print $cgi->header(
6269                         -type=>"text/plain", -charset => "utf-8",
6270                         -status=> "200 OK");
6271                 local $| = 1; # output autoflush
6272                 while (my $line = <$fd>) {
6273                         print to_utf8($line);
6274                 }
6275                 close $fd
6276                         or print "ERROR $!\n";
6277
6278                 print 'END';
6279                 if (defined $t0 && gitweb_check_feature('timed')) {
6280                         print ' '.
6281                               tv_interval($t0, [ gettimeofday() ]).
6282                               ' '.$number_of_git_cmds;
6283                 }
6284                 print "\n";
6285
6286                 return;
6287         }
6288
6289         # page header
6290         git_header_html();
6291         my $formats_nav =
6292                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6293                         "blob") .
6294                 " | ";
6295         if ($format eq 'incremental') {
6296                 $formats_nav .=
6297                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6298                                 "blame") . " (non-incremental)";
6299         } else {
6300                 $formats_nav .=
6301                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6302                                 "blame") . " (incremental)";
6303         }
6304         $formats_nav .=
6305                 " | " .
6306                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6307                         "history") .
6308                 " | " .
6309                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6310                         "HEAD");
6311         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6312         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6313         git_print_page_path($file_name, $ftype, $hash_base);
6314
6315         # page body
6316         if ($format eq 'incremental') {
6317                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6318                       "This page requires JavaScript to run.\n Use ".
6319                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6320                               'this page').
6321                       " instead.\n".
6322                       "</b></center></div>\n</noscript>\n";
6323
6324                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6325         }
6326
6327         print qq!<div class="page_body">\n!;
6328         print qq!<div id="progress_info">... / ...</div>\n!
6329                 if ($format eq 'incremental');
6330         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6331               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6332               qq!<thead>\n!.
6333               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6334               qq!</thead>\n!.
6335               qq!<tbody>\n!;
6336
6337         my @rev_color = qw(light dark);
6338         my $num_colors = scalar(@rev_color);
6339         my $current_color = 0;
6340
6341         if ($format eq 'incremental') {
6342                 my $color_class = $rev_color[$current_color];
6343
6344                 #contents of a file
6345                 my $linenr = 0;
6346         LINE:
6347                 while (my $line = <$fd>) {
6348                         chomp $line;
6349                         $linenr++;
6350
6351                         print qq!<tr id="l$linenr" class="$color_class">!.
6352                               qq!<td class="sha1"><a href=""> </a></td>!.
6353                               qq!<td class="linenr">!.
6354                               qq!<a class="linenr" href="">$linenr</a></td>!;
6355                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6356                         print qq!</tr>\n!;
6357                 }
6358
6359         } else { # porcelain, i.e. ordinary blame
6360                 my %metainfo = (); # saves information about commits
6361
6362                 # blame data
6363         LINE:
6364                 while (my $line = <$fd>) {
6365                         chomp $line;
6366                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6367                         # no <lines in group> for subsequent lines in group of lines
6368                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6369                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6370                         if (!exists $metainfo{$full_rev}) {
6371                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6372                         }
6373                         my $meta = $metainfo{$full_rev};
6374                         my $data;
6375                         while ($data = <$fd>) {
6376                                 chomp $data;
6377                                 last if ($data =~ s/^\t//); # contents of line
6378                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6379                                         $meta->{$1} = $2 unless exists $meta->{$1};
6380                                 }
6381                                 if ($data =~ /^previous /) {
6382                                         $meta->{'nprevious'}++;
6383                                 }
6384                         }
6385                         my $short_rev = substr($full_rev, 0, 8);
6386                         my $author = $meta->{'author'};
6387                         my %date =
6388                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6389                         my $date = $date{'iso-tz'};
6390                         if ($group_size) {
6391                                 $current_color = ($current_color + 1) % $num_colors;
6392                         }
6393                         my $tr_class = $rev_color[$current_color];
6394                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6395                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6396                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6397                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6398                         if ($group_size) {
6399                                 print "<td class=\"sha1\"";
6400                                 print " title=\"". esc_html($author) . ", $date\"";
6401                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6402                                 print ">";
6403                                 print $cgi->a({-href => href(action=>"commit",
6404                                                              hash=>$full_rev,
6405                                                              file_name=>$file_name)},
6406                                               esc_html($short_rev));
6407                                 if ($group_size >= 2) {
6408                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6409                                         if (@author_initials) {
6410                                                 print "<br />" .
6411                                                       esc_html(join('', @author_initials));
6412                                                 #           or join('.', ...)
6413                                         }
6414                                 }
6415                                 print "</td>\n";
6416                         }
6417                         # 'previous' <sha1 of parent commit> <filename at commit>
6418                         if (exists $meta->{'previous'} &&
6419                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6420                                 $meta->{'parent'} = $1;
6421                                 $meta->{'file_parent'} = unquote($2);
6422                         }
6423                         my $linenr_commit =
6424                                 exists($meta->{'parent'}) ?
6425                                 $meta->{'parent'} : $full_rev;
6426                         my $linenr_filename =
6427                                 exists($meta->{'file_parent'}) ?
6428                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6429                         my $blamed = href(action => 'blame',
6430                                           file_name => $linenr_filename,
6431                                           hash_base => $linenr_commit);
6432                         print "<td class=\"linenr\">";
6433                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6434                                         -class => "linenr" },
6435                                       esc_html($lineno));
6436                         print "</td>";
6437                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6438                         print "</tr>\n";
6439                 } # end while
6440
6441         }
6442
6443         # footer
6444         print "</tbody>\n".
6445               "</table>\n"; # class="blame"
6446         print "</div>\n";   # class="blame_body"
6447         close $fd
6448                 or print "Reading blob failed\n";
6449
6450         git_footer_html();
6451 }
6452
6453 sub git_blame {
6454         git_blame_common();
6455 }
6456
6457 sub git_blame_incremental {
6458         git_blame_common('incremental');
6459 }
6460
6461 sub git_blame_data {
6462         git_blame_common('data');
6463 }
6464
6465 sub git_tags {
6466         my $head = git_get_head_hash($project);
6467         git_header_html();
6468         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6469         git_print_header_div('summary', $project);
6470
6471         my @tagslist = git_get_tags_list();
6472         if (@tagslist) {
6473                 git_tags_body(\@tagslist);
6474         }
6475         git_footer_html();
6476 }
6477
6478 sub git_heads {
6479         my $head = git_get_head_hash($project);
6480         git_header_html();
6481         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6482         git_print_header_div('summary', $project);
6483
6484         my @headslist = git_get_heads_list();
6485         if (@headslist) {
6486                 git_heads_body(\@headslist, $head);
6487         }
6488         git_footer_html();
6489 }
6490
6491 # used both for single remote view and for list of all the remotes
6492 sub git_remotes {
6493         gitweb_check_feature('remote_heads')
6494                 or die_error(403, "Remote heads view is disabled");
6495
6496         my $head = git_get_head_hash($project);
6497         my $remote = $input_params{'hash'};
6498
6499         my $remotedata = git_get_remotes_list($remote);
6500         die_error(500, "Unable to get remote information") unless defined $remotedata;
6501
6502         unless (%$remotedata) {
6503                 die_error(404, defined $remote ?
6504                         "Remote $remote not found" :
6505                         "No remotes found");
6506         }
6507
6508         git_header_html(undef, undef, -action_extra => $remote);
6509         git_print_page_nav('', '',  $head, undef, $head,
6510                 format_ref_views($remote ? '' : 'remotes'));
6511
6512         fill_remote_heads($remotedata);
6513         if (defined $remote) {
6514                 git_print_header_div('remotes', "$remote remote for $project");
6515                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6516         } else {
6517                 git_print_header_div('summary', "$project remotes");
6518                 git_remotes_body($remotedata, undef, $head);
6519         }
6520
6521         git_footer_html();
6522 }
6523
6524 sub git_blob_plain {
6525         my $type = shift;
6526         my $expires;
6527
6528         if (!defined $hash) {
6529                 if (defined $file_name) {
6530                         my $base = $hash_base || git_get_head_hash($project);
6531                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6532                                 or die_error(404, "Cannot find file");
6533                 } else {
6534                         die_error(400, "No file name defined");
6535                 }
6536         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6537                 # blobs defined by non-textual hash id's can be cached
6538                 $expires = "+1d";
6539         }
6540
6541         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6542                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6543
6544         # content-type (can include charset)
6545         $type = blob_contenttype($fd, $file_name, $type);
6546
6547         # "save as" filename, even when no $file_name is given
6548         my $save_as = "$hash";
6549         if (defined $file_name) {
6550                 $save_as = $file_name;
6551         } elsif ($type =~ m/^text\//) {
6552                 $save_as .= '.txt';
6553         }
6554
6555         # With XSS prevention on, blobs of all types except a few known safe
6556         # ones are served with "Content-Disposition: attachment" to make sure
6557         # they don't run in our security domain.  For certain image types,
6558         # blob view writes an <img> tag referring to blob_plain view, and we
6559         # want to be sure not to break that by serving the image as an
6560         # attachment (though Firefox 3 doesn't seem to care).
6561         my $sandbox = $prevent_xss &&
6562                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6563
6564         # serve text/* as text/plain
6565         if ($prevent_xss &&
6566             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6567              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6568                 my $rest = $1;
6569                 $rest = defined $rest ? $rest : '';
6570                 $type = "text/plain$rest";
6571         }
6572
6573         print $cgi->header(
6574                 -type => $type,
6575                 -expires => $expires,
6576                 -content_disposition =>
6577                         ($sandbox ? 'attachment' : 'inline')
6578                         . '; filename="' . $save_as . '"');
6579         local $/ = undef;
6580         binmode STDOUT, ':raw';
6581         print <$fd>;
6582         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6583         close $fd;
6584 }
6585
6586 sub git_blob {
6587         my $expires;
6588
6589         if (!defined $hash) {
6590                 if (defined $file_name) {
6591                         my $base = $hash_base || git_get_head_hash($project);
6592                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6593                                 or die_error(404, "Cannot find file");
6594                 } else {
6595                         die_error(400, "No file name defined");
6596                 }
6597         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6598                 # blobs defined by non-textual hash id's can be cached
6599                 $expires = "+1d";
6600         }
6601
6602         my $have_blame = gitweb_check_feature('blame');
6603         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6604                 or die_error(500, "Couldn't cat $file_name, $hash");
6605         my $mimetype = blob_mimetype($fd, $file_name);
6606         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6607         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6608                 close $fd;
6609                 return git_blob_plain($mimetype);
6610         }
6611         # we can have blame only for text/* mimetype
6612         $have_blame &&= ($mimetype =~ m!^text/!);
6613
6614         my $highlight_js = gitweb_check_feature('syntaxhighlighter_js');
6615         if ($highlight_js) {
6616                 push @stylesheets, $highlight_js->{url} . '/styles/shCore'
6617                         . $highlight_js->{style} . '.css';
6618                 push @stylesheets, $highlight_js->{url} . '/styles/shTheme'
6619                         . $highlight_js->{theme} . '.css';
6620         }
6621
6622         my $highlight = gitweb_check_feature('highlight');
6623         if ($highlight_js && $highlight) {
6624                 die_error(500, 'The highlight and syntaxhighlighter_js are'
6625                         . 'mutually exclusive');
6626         }
6627         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6628         $fd = run_highlighter($fd, $highlight, $syntax)
6629                 if $syntax;
6630
6631         git_header_html(undef, $expires);
6632         my $formats_nav = '';
6633         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6634                 if (defined $file_name) {
6635                         if ($have_blame) {
6636                                 $formats_nav .=
6637                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6638                                                 "blame") .
6639                                         " | ";
6640                         }
6641                         $formats_nav .=
6642                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6643                                         "history") .
6644                                 " | " .
6645                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6646                                         "raw") .
6647                                 " | " .
6648                                 $cgi->a({-href => href(action=>"blob",
6649                                                        hash_base=>"HEAD", file_name=>$file_name)},
6650                                         "HEAD");
6651                 } else {
6652                         $formats_nav .=
6653                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6654                                         "raw");
6655                 }
6656                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6657                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6658         } else {
6659                 print "<div class=\"page_nav\">\n" .
6660                       "<br/><br/></div>\n" .
6661                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6662         }
6663         git_print_page_path($file_name, "blob", $hash_base);
6664         print "<div class=\"page_body\">\n";
6665         if ($mimetype =~ m!^image/!) {
6666                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6667                 if ($file_name) {
6668                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6669                 }
6670                 print qq! src="! .
6671                       href(action=>"blob_plain", hash=>$hash,
6672                            hash_base=>$hash_base, file_name=>$file_name) .
6673                       qq!" />\n!;
6674         } elsif ($highlight_js) {
6675                 my $ext = $file_name;
6676                 $ext =~ s/.*\.//;
6677                 print qq!<pre class="brush:!.$ext.qq!">!;
6678                 while (my $line = <$fd>) {
6679                         $line =~ s!&!\&#38;!g;
6680                         $line =~ s!<!\&#60;!g;
6681                         print $line;
6682                 }
6683                 print qq!</pre>!;
6684                 foreach my $name ('Core', 'Autoloader') {
6685                         print qq!<script src="!.$highlight_js->{url}
6686                                 .qq!/scripts/sh!.$name
6687                                 .qq!.js" type="text/javascript"></script>!;
6688                 }
6689                 print qq!<script type="text/javascript">!;
6690                 print qq!SyntaxHighlighter.defaults["pad-line-numbers"] = 3;!;
6691                 print qq!SyntaxHighlighter.defaults["toolbar"] = false;!;
6692                 # for XHTML compliance
6693                 print qq!SyntaxHighlighter.config["space"] = '&#160;';!;
6694                 print qq!SyntaxHighlighter.autoloader(!;
6695                 my $brush_prefix = $highlight_js->{url} . '/scripts/shBrush';
6696                 foreach my $language ('applescript AppleScript',
6697                                 'actionscript3 as3 AS3',
6698                                 'bash shell Bash',
6699                                 'clj Clojure',
6700                                 'coldfusion cf ColdFusion',
6701                                 'cpp c Cpp',
6702                                 'c# c-sharp csharp CSharp',
6703                                 'css Css',
6704                                 'delphi pascal Delphi',
6705                                 'diff patch pas Diff',
6706                                 'erl erlang Erlang',
6707                                 'groovy Groovy',
6708                                 'java Java',
6709                                 'jfx javafx JavaFX',
6710                                 'js jscript javascript JScript',
6711                                 'perl pl Perl',
6712                                 'php Php',
6713                                 'text plain Plain',
6714                                 'py python Python',
6715                                 'ruby rails ror rb Ruby',
6716                                 'scala Scala',
6717                                 'scm Scheme',
6718                                 'sql Sql',
6719                                 'vb vbnet Vb',
6720                                 'xml xhtml xslt html Xml') {
6721                         my $lang = $language;
6722                         $lang =~ s! (\S+)$! $brush_prefix$1!;
6723                         print "'".$lang.qq!.js',!;
6724                 }
6725                 print qq!''); SyntaxHighlighter.all();!
6726                         .qq!function scrollTo(number) {!
6727                         .qq!  var elements = document.getElementsByClassName(number);!
6728                         .qq!  if (elements.length == 0) setTimeout('scrollTo("' + number + '");', 50);!
6729                         .qq!  else {!
6730                         .qq!    window.scroll(0, elements[0].offsetTop);!
6731                         .qq!    window.scrollTo(0, elements[0].offsetTop);!
6732                         .qq!    elements[0].style.color = '#ff0000';!
6733                         .qq!  }!
6734                         .qq!}!
6735                         .qq!var lineRegex = /#l(\\d+)\$/;!
6736                         .qq!var lineNumber = lineRegex.exec(document.URL);!
6737                         .qq!if (lineNumber)!
6738                         .qq!  scrollTo('number' + lineNumber[1]);!
6739                         .qq!</script>!;
6740         } else {
6741                 my $nr;
6742                 while (my $line = <$fd>) {
6743                         chomp $line;
6744                         $nr++;
6745                         $line = untabify($line);
6746                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6747                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6748                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6749                 }
6750         }
6751         close $fd
6752                 or print "Reading blob failed.\n";
6753         print "</div>";
6754         git_footer_html();
6755 }
6756
6757 sub git_tree {
6758         if (!defined $hash_base) {
6759                 $hash_base = "HEAD";
6760         }
6761         if (!defined $hash) {
6762                 if (defined $file_name) {
6763                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6764                 } else {
6765                         $hash = $hash_base;
6766                 }
6767         }
6768         die_error(404, "No such tree") unless defined($hash);
6769
6770         my $show_sizes = gitweb_check_feature('show-sizes');
6771         my $have_blame = gitweb_check_feature('blame');
6772
6773         my @entries = ();
6774         {
6775                 local $/ = "\0";
6776                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6777                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6778                         or die_error(500, "Open git-ls-tree failed");
6779                 @entries = map { chomp; $_ } <$fd>;
6780                 close $fd
6781                         or die_error(404, "Reading tree failed");
6782         }
6783
6784         my $refs = git_get_references();
6785         my $ref = format_ref_marker($refs, $hash_base);
6786         git_header_html();
6787         my $basedir = '';
6788         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6789                 my @views_nav = ();
6790                 if (defined $file_name) {
6791                         push @views_nav,
6792                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6793                                         "history"),
6794                                 $cgi->a({-href => href(action=>"tree",
6795                                                        hash_base=>"HEAD", file_name=>$file_name)},
6796                                         "HEAD"),
6797                 }
6798                 my $snapshot_links = format_snapshot_links($hash);
6799                 if (defined $snapshot_links) {
6800                         # FIXME: Should be available when we have no hash base as well.
6801                         push @views_nav, $snapshot_links;
6802                 }
6803                 git_print_page_nav('tree','', $hash_base, undef, undef,
6804                                    join(' | ', @views_nav));
6805                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6806         } else {
6807                 undef $hash_base;
6808                 print "<div class=\"page_nav\">\n";
6809                 print "<br/><br/></div>\n";
6810                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6811         }
6812         if (defined $file_name) {
6813                 $basedir = $file_name;
6814                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6815                         $basedir .= '/';
6816                 }
6817                 git_print_page_path($file_name, 'tree', $hash_base);
6818         }
6819         print "<div class=\"page_body\">\n";
6820         print "<table class=\"tree\">\n";
6821         my $alternate = 1;
6822         # '..' (top directory) link if possible
6823         if (defined $hash_base &&
6824             defined $file_name && $file_name =~ m![^/]+$!) {
6825                 if ($alternate) {
6826                         print "<tr class=\"dark\">\n";
6827                 } else {
6828                         print "<tr class=\"light\">\n";
6829                 }
6830                 $alternate ^= 1;
6831
6832                 my $up = $file_name;
6833                 $up =~ s!/?[^/]+$!!;
6834                 undef $up unless $up;
6835                 # based on git_print_tree_entry
6836                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6837                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6838                 print '<td class="list">';
6839                 print $cgi->a({-href => href(action=>"tree",
6840                                              hash_base=>$hash_base,
6841                                              file_name=>$up)},
6842                               "..");
6843                 print "</td>\n";
6844                 print "<td class=\"link\"></td>\n";
6845
6846                 print "</tr>\n";
6847         }
6848         foreach my $line (@entries) {
6849                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6850
6851                 if ($alternate) {
6852                         print "<tr class=\"dark\">\n";
6853                 } else {
6854                         print "<tr class=\"light\">\n";
6855                 }
6856                 $alternate ^= 1;
6857
6858                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6859
6860                 print "</tr>\n";
6861         }
6862         print "</table>\n" .
6863               "</div>";
6864         git_footer_html();
6865 }
6866
6867 sub snapshot_name {
6868         my ($project, $hash) = @_;
6869
6870         # path/to/project.git  -> project
6871         # path/to/project/.git -> project
6872         my $name = to_utf8($project);
6873         $name =~ s,([^/])/*\.git$,$1,;
6874         $name = basename($name);
6875         # sanitize name
6876         $name =~ s/[[:cntrl:]]/?/g;
6877
6878         my $ver = $hash;
6879         if ($hash =~ /^[0-9a-fA-F]+$/) {
6880                 # shorten SHA-1 hash
6881                 my $full_hash = git_get_full_hash($project, $hash);
6882                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6883                         $ver = git_get_short_hash($project, $hash);
6884                 }
6885         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6886                 # tags don't need shortened SHA-1 hash
6887                 $ver = $1;
6888         } else {
6889                 # branches and other need shortened SHA-1 hash
6890                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6891                         $ver = $1;
6892                 }
6893                 $ver .= '-' . git_get_short_hash($project, $hash);
6894         }
6895         # in case of hierarchical branch names
6896         $ver =~ s!/!.!g;
6897
6898         # name = project-version_string
6899         $name = "$name-$ver";
6900
6901         return wantarray ? ($name, $name) : $name;
6902 }
6903
6904 sub git_snapshot {
6905         my $format = $input_params{'snapshot_format'};
6906         if (!@snapshot_fmts) {
6907                 die_error(403, "Snapshots not allowed");
6908         }
6909         # default to first supported snapshot format
6910         $format ||= $snapshot_fmts[0];
6911         if ($format !~ m/^[a-z0-9]+$/) {
6912                 die_error(400, "Invalid snapshot format parameter");
6913         } elsif (!exists($known_snapshot_formats{$format})) {
6914                 die_error(400, "Unknown snapshot format");
6915         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6916                 die_error(403, "Snapshot format not allowed");
6917         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6918                 die_error(403, "Unsupported snapshot format");
6919         }
6920
6921         my $type = git_get_type("$hash^{}");
6922         if (!$type) {
6923                 die_error(404, 'Object does not exist');
6924         }  elsif ($type eq 'blob') {
6925                 die_error(400, 'Object is not a tree-ish');
6926         }
6927
6928         my ($name, $prefix) = snapshot_name($project, $hash);
6929         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6930         my $cmd = quote_command(
6931                 git_cmd(), 'archive',
6932                 "--format=$known_snapshot_formats{$format}{'format'}",
6933                 "--prefix=$prefix/", $hash);
6934         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6935                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6936         }
6937
6938         $filename =~ s/(["\\])/\\$1/g;
6939         print $cgi->header(
6940                 -type => $known_snapshot_formats{$format}{'type'},
6941                 -content_disposition => 'inline; filename="' . $filename . '"',
6942                 -status => '200 OK');
6943
6944         open my $fd, "-|", $cmd
6945                 or die_error(500, "Execute git-archive failed");
6946         binmode STDOUT, ':raw';
6947         print <$fd>;
6948         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6949         close $fd;
6950 }
6951
6952 sub git_log_generic {
6953         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6954
6955         my $head = git_get_head_hash($project);
6956         if (!defined $base) {
6957                 $base = $head;
6958         }
6959         if (!defined $page) {
6960                 $page = 0;
6961         }
6962         my $refs = git_get_references();
6963
6964         my $commit_hash = $base;
6965         if (defined $parent) {
6966                 $commit_hash = "$parent..$base";
6967         }
6968         my @commitlist =
6969                 parse_commits($commit_hash, 101, (100 * $page),
6970                               defined $file_name ? ($file_name, "--full-history") : ());
6971
6972         my $ftype;
6973         if (!defined $file_hash && defined $file_name) {
6974                 # some commits could have deleted file in question,
6975                 # and not have it in tree, but one of them has to have it
6976                 for (my $i = 0; $i < @commitlist; $i++) {
6977                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6978                         last if defined $file_hash;
6979                 }
6980         }
6981         if (defined $file_hash) {
6982                 $ftype = git_get_type($file_hash);
6983         }
6984         if (defined $file_name && !defined $ftype) {
6985                 die_error(500, "Unknown type of object");
6986         }
6987         my %co;
6988         if (defined $file_name) {
6989                 %co = parse_commit($base)
6990                         or die_error(404, "Unknown commit object");
6991         }
6992
6993
6994         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6995         my $next_link = '';
6996         if ($#commitlist >= 100) {
6997                 $next_link =
6998                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6999                                  -accesskey => "n", -title => "Alt-n"}, "next");
7000         }
7001         my $patch_max = gitweb_get_feature('patches');
7002         if ($patch_max && !defined $file_name) {
7003                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7004                         $paging_nav .= " &sdot; " .
7005                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7006                                         "patches");
7007                 }
7008         }
7009
7010         git_header_html();
7011         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7012         if (defined $file_name) {
7013                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7014         } else {
7015                 git_print_header_div('summary', $project)
7016         }
7017         git_print_page_path($file_name, $ftype, $hash_base)
7018                 if (defined $file_name);
7019
7020         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7021                      $file_name, $file_hash, $ftype);
7022
7023         git_footer_html();
7024 }
7025
7026 sub git_log {
7027         git_log_generic('log', \&git_log_body,
7028                         $hash, $hash_parent);
7029 }
7030
7031 sub git_commit {
7032         $hash ||= $hash_base || "HEAD";
7033         my %co = parse_commit($hash)
7034             or die_error(404, "Unknown commit object");
7035
7036         my $parent  = $co{'parent'};
7037         my $parents = $co{'parents'}; # listref
7038
7039         # we need to prepare $formats_nav before any parameter munging
7040         my $formats_nav;
7041         if (!defined $parent) {
7042                 # --root commitdiff
7043                 $formats_nav .= '(initial)';
7044         } elsif (@$parents == 1) {
7045                 # single parent commit
7046                 $formats_nav .=
7047                         '(parent: ' .
7048                         $cgi->a({-href => href(action=>"commit",
7049                                                hash=>$parent)},
7050                                 esc_html(substr($parent, 0, 7))) .
7051                         ')';
7052         } else {
7053                 # merge commit
7054                 $formats_nav .=
7055                         '(merge: ' .
7056                         join(' ', map {
7057                                 $cgi->a({-href => href(action=>"commit",
7058                                                        hash=>$_)},
7059                                         esc_html(substr($_, 0, 7)));
7060                         } @$parents ) .
7061                         ')';
7062         }
7063         if (gitweb_check_feature('patches') && @$parents <= 1) {
7064                 $formats_nav .= " | " .
7065                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7066                                 "patch");
7067         }
7068
7069         if (!defined $parent) {
7070                 $parent = "--root";
7071         }
7072         my @difftree;
7073         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7074                 @diff_opts,
7075                 (@$parents <= 1 ? $parent : '-c'),
7076                 $hash, "--"
7077                 or die_error(500, "Open git-diff-tree failed");
7078         @difftree = map { chomp; $_ } <$fd>;
7079         close $fd or die_error(404, "Reading git-diff-tree failed");
7080
7081         # non-textual hash id's can be cached
7082         my $expires;
7083         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7084                 $expires = "+1d";
7085         }
7086         my $refs = git_get_references();
7087         my $ref = format_ref_marker($refs, $co{'id'});
7088
7089         git_header_html(undef, $expires);
7090         git_print_page_nav('commit', '',
7091                            $hash, $co{'tree'}, $hash,
7092                            $formats_nav);
7093
7094         if (defined $co{'parent'}) {
7095                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7096         } else {
7097                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7098         }
7099         print "<div class=\"title_text\">\n" .
7100               "<table class=\"object_header\">\n";
7101         git_print_authorship_rows(\%co);
7102         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7103         print "<tr>" .
7104               "<td>tree</td>" .
7105               "<td class=\"sha1\">" .
7106               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7107                        class => "list"}, $co{'tree'}) .
7108               "</td>" .
7109               "<td class=\"link\">" .
7110               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7111                       "tree");
7112         my $snapshot_links = format_snapshot_links($hash);
7113         if (defined $snapshot_links) {
7114                 print " | " . $snapshot_links;
7115         }
7116         print "</td>" .
7117               "</tr>\n";
7118
7119         foreach my $par (@$parents) {
7120                 print "<tr>" .
7121                       "<td>parent</td>" .
7122                       "<td class=\"sha1\">" .
7123                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7124                                class => "list"}, $par) .
7125                       "</td>" .
7126                       "<td class=\"link\">" .
7127                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7128                       " | " .
7129                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7130                       "</td>" .
7131                       "</tr>\n";
7132         }
7133         print "</table>".
7134               "</div>\n";
7135
7136         print "<div class=\"page_body\">\n";
7137         git_print_log($co{'comment'});
7138         print "</div>\n";
7139
7140         git_difftree_body(\@difftree, $hash, @$parents);
7141
7142         git_footer_html();
7143 }
7144
7145 sub git_object {
7146         # object is defined by:
7147         # - hash or hash_base alone
7148         # - hash_base and file_name
7149         my $type;
7150
7151         # - hash or hash_base alone
7152         if ($hash || ($hash_base && !defined $file_name)) {
7153                 my $object_id = $hash || $hash_base;
7154
7155                 open my $fd, "-|", quote_command(
7156                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7157                         or die_error(404, "Object does not exist");
7158                 $type = <$fd>;
7159                 chomp $type;
7160                 close $fd
7161                         or die_error(404, "Object does not exist");
7162
7163         # - hash_base and file_name
7164         } elsif ($hash_base && defined $file_name) {
7165                 $file_name =~ s,/+$,,;
7166
7167                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7168                         or die_error(404, "Base object does not exist");
7169
7170                 # here errors should not hapen
7171                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7172                         or die_error(500, "Open git-ls-tree failed");
7173                 my $line = <$fd>;
7174                 close $fd;
7175
7176                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7177                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7178                         die_error(404, "File or directory for given base does not exist");
7179                 }
7180                 $type = $2;
7181                 $hash = $3;
7182         } else {
7183                 die_error(400, "Not enough information to find object");
7184         }
7185
7186         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7187                                           hash=>$hash, hash_base=>$hash_base,
7188                                           file_name=>$file_name),
7189                              -status => '302 Found');
7190 }
7191
7192 sub git_blobdiff {
7193         my $format = shift || 'html';
7194         my $diff_style = $input_params{'diff_style'} || 'inline';
7195
7196         my $fd;
7197         my @difftree;
7198         my %diffinfo;
7199         my $expires;
7200
7201         # preparing $fd and %diffinfo for git_patchset_body
7202         # new style URI
7203         if (defined $hash_base && defined $hash_parent_base) {
7204                 if (defined $file_name) {
7205                         # read raw output
7206                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7207                                 $hash_parent_base, $hash_base,
7208                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7209                                 or die_error(500, "Open git-diff-tree failed");
7210                         @difftree = map { chomp; $_ } <$fd>;
7211                         close $fd
7212                                 or die_error(404, "Reading git-diff-tree failed");
7213                         @difftree
7214                                 or die_error(404, "Blob diff not found");
7215
7216                 } elsif (defined $hash &&
7217                          $hash =~ /[0-9a-fA-F]{40}/) {
7218                         # try to find filename from $hash
7219
7220                         # read filtered raw output
7221                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7222                                 $hash_parent_base, $hash_base, "--"
7223                                 or die_error(500, "Open git-diff-tree failed");
7224                         @difftree =
7225                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7226                                 # $hash == to_id
7227                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7228                                 map { chomp; $_ } <$fd>;
7229                         close $fd
7230                                 or die_error(404, "Reading git-diff-tree failed");
7231                         @difftree
7232                                 or die_error(404, "Blob diff not found");
7233
7234                 } else {
7235                         die_error(400, "Missing one of the blob diff parameters");
7236                 }
7237
7238                 if (@difftree > 1) {
7239                         die_error(400, "Ambiguous blob diff specification");
7240                 }
7241
7242                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7243                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7244                 $file_name   ||= $diffinfo{'to_file'};
7245
7246                 $hash_parent ||= $diffinfo{'from_id'};
7247                 $hash        ||= $diffinfo{'to_id'};
7248
7249                 # non-textual hash id's can be cached
7250                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7251                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7252                         $expires = '+1d';
7253                 }
7254
7255                 # open patch output
7256                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7257                         '-p', ($format eq 'html' ? "--full-index" : ()),
7258                         $hash_parent_base, $hash_base,
7259                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7260                         or die_error(500, "Open git-diff-tree failed");
7261         }
7262
7263         # old/legacy style URI -- not generated anymore since 1.4.3.
7264         if (!%diffinfo) {
7265                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7266         }
7267
7268         # header
7269         if ($format eq 'html') {
7270                 my $formats_nav =
7271                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7272                                 "raw");
7273                 $formats_nav .= diff_style_nav($diff_style);
7274                 git_header_html(undef, $expires);
7275                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7276                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7277                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7278                 } else {
7279                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7280                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7281                 }
7282                 if (defined $file_name) {
7283                         git_print_page_path($file_name, "blob", $hash_base);
7284                 } else {
7285                         print "<div class=\"page_path\"></div>\n";
7286                 }
7287
7288         } elsif ($format eq 'plain') {
7289                 print $cgi->header(
7290                         -type => 'text/plain',
7291                         -charset => 'utf-8',
7292                         -expires => $expires,
7293                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7294
7295                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7296
7297         } else {
7298                 die_error(400, "Unknown blobdiff format");
7299         }
7300
7301         # patch
7302         if ($format eq 'html') {
7303                 print "<div class=\"page_body\">\n";
7304
7305                 git_patchset_body($fd, $diff_style,
7306                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7307                 close $fd;
7308
7309                 print "</div>\n"; # class="page_body"
7310                 git_footer_html();
7311
7312         } else {
7313                 while (my $line = <$fd>) {
7314                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7315                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7316
7317                         print $line;
7318
7319                         last if $line =~ m!^\+\+\+!;
7320                 }
7321                 local $/ = undef;
7322                 print <$fd>;
7323                 close $fd;
7324         }
7325 }
7326
7327 sub git_blobdiff_plain {
7328         git_blobdiff('plain');
7329 }
7330
7331 # assumes that it is added as later part of already existing navigation,
7332 # so it returns "| foo | bar" rather than just "foo | bar"
7333 sub diff_style_nav {
7334         my ($diff_style, $is_combined) = @_;
7335         $diff_style ||= 'inline';
7336
7337         return "" if ($is_combined);
7338
7339         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7340         my %styles = @styles;
7341         @styles =
7342                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7343
7344         return join '',
7345                 map { " | ".$_ }
7346                 map {
7347                         $_ eq $diff_style ? $styles{$_} :
7348                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7349                 } @styles;
7350 }
7351
7352 sub git_commitdiff {
7353         my %params = @_;
7354         my $format = $params{-format} || 'html';
7355         my $diff_style = $input_params{'diff_style'} || 'inline';
7356
7357         my ($patch_max) = gitweb_get_feature('patches');
7358         if ($format eq 'patch') {
7359                 die_error(403, "Patch view not allowed") unless $patch_max;
7360         }
7361
7362         $hash ||= $hash_base || "HEAD";
7363         my %co = parse_commit($hash)
7364             or die_error(404, "Unknown commit object");
7365
7366         # choose format for commitdiff for merge
7367         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7368                 $hash_parent = '--cc';
7369         }
7370         # we need to prepare $formats_nav before almost any parameter munging
7371         my $formats_nav;
7372         if ($format eq 'html') {
7373                 $formats_nav =
7374                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7375                                 "raw");
7376                 if ($patch_max && @{$co{'parents'}} <= 1) {
7377                         $formats_nav .= " | " .
7378                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7379                                         "patch");
7380                 }
7381                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7382
7383                 if (defined $hash_parent &&
7384                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7385                         # commitdiff with two commits given
7386                         my $hash_parent_short = $hash_parent;
7387                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7388                                 $hash_parent_short = substr($hash_parent, 0, 7);
7389                         }
7390                         $formats_nav .=
7391                                 ' (from';
7392                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7393                                 if ($co{'parents'}[$i] eq $hash_parent) {
7394                                         $formats_nav .= ' parent ' . ($i+1);
7395                                         last;
7396                                 }
7397                         }
7398                         $formats_nav .= ': ' .
7399                                 $cgi->a({-href => href(-replay=>1,
7400                                                        hash=>$hash_parent, hash_base=>undef)},
7401                                         esc_html($hash_parent_short)) .
7402                                 ')';
7403                 } elsif (!$co{'parent'}) {
7404                         # --root commitdiff
7405                         $formats_nav .= ' (initial)';
7406                 } elsif (scalar @{$co{'parents'}} == 1) {
7407                         # single parent commit
7408                         $formats_nav .=
7409                                 ' (parent: ' .
7410                                 $cgi->a({-href => href(-replay=>1,
7411                                                        hash=>$co{'parent'}, hash_base=>undef)},
7412                                         esc_html(substr($co{'parent'}, 0, 7))) .
7413                                 ')';
7414                 } else {
7415                         # merge commit
7416                         if ($hash_parent eq '--cc') {
7417                                 $formats_nav .= ' | ' .
7418                                         $cgi->a({-href => href(-replay=>1,
7419                                                                hash=>$hash, hash_parent=>'-c')},
7420                                                 'combined');
7421                         } else { # $hash_parent eq '-c'
7422                                 $formats_nav .= ' | ' .
7423                                         $cgi->a({-href => href(-replay=>1,
7424                                                                hash=>$hash, hash_parent=>'--cc')},
7425                                                 'compact');
7426                         }
7427                         $formats_nav .=
7428                                 ' (merge: ' .
7429                                 join(' ', map {
7430                                         $cgi->a({-href => href(-replay=>1,
7431                                                                hash=>$_, hash_base=>undef)},
7432                                                 esc_html(substr($_, 0, 7)));
7433                                 } @{$co{'parents'}} ) .
7434                                 ')';
7435                 }
7436         }
7437
7438         my $hash_parent_param = $hash_parent;
7439         if (!defined $hash_parent_param) {
7440                 # --cc for multiple parents, --root for parentless
7441                 $hash_parent_param =
7442                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7443         }
7444
7445         # read commitdiff
7446         my $fd;
7447         my @difftree;
7448         if ($format eq 'html') {
7449                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7450                         "--no-commit-id", "--patch-with-raw", "--full-index",
7451                         $hash_parent_param, $hash, "--"
7452                         or die_error(500, "Open git-diff-tree failed");
7453
7454                 while (my $line = <$fd>) {
7455                         chomp $line;
7456                         # empty line ends raw part of diff-tree output
7457                         last unless $line;
7458                         push @difftree, scalar parse_difftree_raw_line($line);
7459                 }
7460
7461         } elsif ($format eq 'plain') {
7462                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7463                         '-p', $hash_parent_param, $hash, "--"
7464                         or die_error(500, "Open git-diff-tree failed");
7465         } elsif ($format eq 'patch') {
7466                 # For commit ranges, we limit the output to the number of
7467                 # patches specified in the 'patches' feature.
7468                 # For single commits, we limit the output to a single patch,
7469                 # diverging from the git-format-patch default.
7470                 my @commit_spec = ();
7471                 if ($hash_parent) {
7472                         if ($patch_max > 0) {
7473                                 push @commit_spec, "-$patch_max";
7474                         }
7475                         push @commit_spec, '-n', "$hash_parent..$hash";
7476                 } else {
7477                         if ($params{-single}) {
7478                                 push @commit_spec, '-1';
7479                         } else {
7480                                 if ($patch_max > 0) {
7481                                         push @commit_spec, "-$patch_max";
7482                                 }
7483                                 push @commit_spec, "-n";
7484                         }
7485                         push @commit_spec, '--root', $hash;
7486                 }
7487                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7488                         '--encoding=utf8', '--stdout', @commit_spec
7489                         or die_error(500, "Open git-format-patch failed");
7490         } else {
7491                 die_error(400, "Unknown commitdiff format");
7492         }
7493
7494         # non-textual hash id's can be cached
7495         my $expires;
7496         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7497                 $expires = "+1d";
7498         }
7499
7500         # write commit message
7501         if ($format eq 'html') {
7502                 my $refs = git_get_references();
7503                 my $ref = format_ref_marker($refs, $co{'id'});
7504
7505                 git_header_html(undef, $expires);
7506                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7507                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7508                 print "<div class=\"title_text\">\n" .
7509                       "<table class=\"object_header\">\n";
7510                 git_print_authorship_rows(\%co);
7511                 print "</table>".
7512                       "</div>\n";
7513                 print "<div class=\"page_body\">\n";
7514                 if (@{$co{'comment'}} > 1) {
7515                         print "<div class=\"log\">\n";
7516                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7517                         print "</div>\n"; # class="log"
7518                 }
7519
7520         } elsif ($format eq 'plain') {
7521                 my $refs = git_get_references("tags");
7522                 my $tagname = git_get_rev_name_tags($hash);
7523                 my $filename = basename($project) . "-$hash.patch";
7524
7525                 print $cgi->header(
7526                         -type => 'text/plain',
7527                         -charset => 'utf-8',
7528                         -expires => $expires,
7529                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7530                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7531                 print "From: " . to_utf8($co{'author'}) . "\n";
7532                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7533                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7534
7535                 print "X-Git-Tag: $tagname\n" if $tagname;
7536                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7537
7538                 foreach my $line (@{$co{'comment'}}) {
7539                         print to_utf8($line) . "\n";
7540                 }
7541                 print "---\n\n";
7542         } elsif ($format eq 'patch') {
7543                 my $filename = basename($project) . "-$hash.patch";
7544
7545                 print $cgi->header(
7546                         -type => 'text/plain',
7547                         -charset => 'utf-8',
7548                         -expires => $expires,
7549                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7550         }
7551
7552         # write patch
7553         if ($format eq 'html') {
7554                 my $use_parents = !defined $hash_parent ||
7555                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7556                 git_difftree_body(\@difftree, $hash,
7557                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7558                 print "<br/>\n";
7559
7560                 git_patchset_body($fd, $diff_style,
7561                                   \@difftree, $hash,
7562                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7563                 close $fd;
7564                 print "</div>\n"; # class="page_body"
7565                 git_footer_html();
7566
7567         } elsif ($format eq 'plain') {
7568                 local $/ = undef;
7569                 print <$fd>;
7570                 close $fd
7571                         or print "Reading git-diff-tree failed\n";
7572         } elsif ($format eq 'patch') {
7573                 local $/ = undef;
7574                 print <$fd>;
7575                 close $fd
7576                         or print "Reading git-format-patch failed\n";
7577         }
7578 }
7579
7580 sub git_commitdiff_plain {
7581         git_commitdiff(-format => 'plain');
7582 }
7583
7584 # format-patch-style patches
7585 sub git_patch {
7586         git_commitdiff(-format => 'patch', -single => 1);
7587 }
7588
7589 sub git_patches {
7590         git_commitdiff(-format => 'patch');
7591 }
7592
7593 sub git_history {
7594         git_log_generic('history', \&git_history_body,
7595                         $hash_base, $hash_parent_base,
7596                         $file_name, $hash);
7597 }
7598
7599 sub git_search {
7600         $searchtype ||= 'commit';
7601
7602         # check if appropriate features are enabled
7603         gitweb_check_feature('search')
7604                 or die_error(403, "Search is disabled");
7605         if ($searchtype eq 'pickaxe') {
7606                 # pickaxe may take all resources of your box and run for several minutes
7607                 # with every query - so decide by yourself how public you make this feature
7608                 gitweb_check_feature('pickaxe')
7609                         or die_error(403, "Pickaxe search is disabled");
7610         }
7611         if ($searchtype eq 'grep') {
7612                 # grep search might be potentially CPU-intensive, too
7613                 gitweb_check_feature('grep')
7614                         or die_error(403, "Grep search is disabled");
7615         }
7616
7617         if (!defined $searchtext) {
7618                 die_error(400, "Text field is empty");
7619         }
7620         if (!defined $hash) {
7621                 $hash = git_get_head_hash($project);
7622         }
7623         my %co = parse_commit($hash);
7624         if (!%co) {
7625                 die_error(404, "Unknown commit object");
7626         }
7627         if (!defined $page) {
7628                 $page = 0;
7629         }
7630
7631         if ($searchtype eq 'commit' ||
7632             $searchtype eq 'author' ||
7633             $searchtype eq 'committer') {
7634                 git_search_message(%co);
7635         } elsif ($searchtype eq 'pickaxe') {
7636                 git_search_changes(%co);
7637         } elsif ($searchtype eq 'grep') {
7638                 git_search_files(%co);
7639         } else {
7640                 die_error(400, "Unknown search type");
7641         }
7642 }
7643
7644 sub git_search_help {
7645         git_header_html();
7646         git_print_page_nav('','', $hash,$hash,$hash);
7647         print <<EOT;
7648 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7649 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7650 the pattern entered is recognized as the POSIX extended
7651 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7652 insensitive).</p>
7653 <dl>
7654 <dt><b>commit</b></dt>
7655 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7656 EOT
7657         my $have_grep = gitweb_check_feature('grep');
7658         if ($have_grep) {
7659                 print <<EOT;
7660 <dt><b>grep</b></dt>
7661 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7662     a different one) are searched for the given pattern. On large trees, this search can take
7663 a while and put some strain on the server, so please use it with some consideration. Note that
7664 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7665 case-sensitive.</dd>
7666 EOT
7667         }
7668         print <<EOT;
7669 <dt><b>author</b></dt>
7670 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7671 <dt><b>committer</b></dt>
7672 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7673 EOT
7674         my $have_pickaxe = gitweb_check_feature('pickaxe');
7675         if ($have_pickaxe) {
7676                 print <<EOT;
7677 <dt><b>pickaxe</b></dt>
7678 <dd>All commits that caused the string to appear or disappear from any file (changes that
7679 added, removed or "modified" the string) will be listed. This search can take a while and
7680 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7681 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7682 EOT
7683         }
7684         print "</dl>\n";
7685         git_footer_html();
7686 }
7687
7688 sub git_shortlog {
7689         git_log_generic('shortlog', \&git_shortlog_body,
7690                         $hash, $hash_parent);
7691 }
7692
7693 ## ......................................................................
7694 ## feeds (RSS, Atom; OPML)
7695
7696 sub git_feed {
7697         my $format = shift || 'atom';
7698         my $have_blame = gitweb_check_feature('blame');
7699
7700         # Atom: http://www.atomenabled.org/developers/syndication/
7701         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7702         if ($format ne 'rss' && $format ne 'atom') {
7703                 die_error(400, "Unknown web feed format");
7704         }
7705
7706         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7707         my $head = $hash || 'HEAD';
7708         my @commitlist = parse_commits($head, 150, 0, $file_name);
7709
7710         my %latest_commit;
7711         my %latest_date;
7712         my $content_type = "application/$format+xml";
7713         if (defined $cgi->http('HTTP_ACCEPT') &&
7714                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7715                 # browser (feed reader) prefers text/xml
7716                 $content_type = 'text/xml';
7717         }
7718         if (defined($commitlist[0])) {
7719                 %latest_commit = %{$commitlist[0]};
7720                 my $latest_epoch = $latest_commit{'committer_epoch'};
7721                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7722                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7723                 if (defined $if_modified) {
7724                         my $since;
7725                         if (eval { require HTTP::Date; 1; }) {
7726                                 $since = HTTP::Date::str2time($if_modified);
7727                         } elsif (eval { require Time::ParseDate; 1; }) {
7728                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7729                         }
7730                         if (defined $since && $latest_epoch <= $since) {
7731                                 print $cgi->header(
7732                                         -type => $content_type,
7733                                         -charset => 'utf-8',
7734                                         -last_modified => $latest_date{'rfc2822'},
7735                                         -status => '304 Not Modified');
7736                                 return;
7737                         }
7738                 }
7739                 print $cgi->header(
7740                         -type => $content_type,
7741                         -charset => 'utf-8',
7742                         -last_modified => $latest_date{'rfc2822'});
7743         } else {
7744                 print $cgi->header(
7745                         -type => $content_type,
7746                         -charset => 'utf-8');
7747         }
7748
7749         # Optimization: skip generating the body if client asks only
7750         # for Last-Modified date.
7751         return if ($cgi->request_method() eq 'HEAD');
7752
7753         # header variables
7754         my $title = "$site_name - $project/$action";
7755         my $feed_type = 'log';
7756         if (defined $hash) {
7757                 $title .= " - '$hash'";
7758                 $feed_type = 'branch log';
7759                 if (defined $file_name) {
7760                         $title .= " :: $file_name";
7761                         $feed_type = 'history';
7762                 }
7763         } elsif (defined $file_name) {
7764                 $title .= " - $file_name";
7765                 $feed_type = 'history';
7766         }
7767         $title .= " $feed_type";
7768         my $descr = git_get_project_description($project);
7769         if (defined $descr) {
7770                 $descr = esc_html($descr);
7771         } else {
7772                 $descr = "$project " .
7773                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7774                          " feed";
7775         }
7776         my $owner = git_get_project_owner($project);
7777         $owner = esc_html($owner);
7778
7779         #header
7780         my $alt_url;
7781         if (defined $file_name) {
7782                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7783         } elsif (defined $hash) {
7784                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7785         } else {
7786                 $alt_url = href(-full=>1, action=>"summary");
7787         }
7788         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7789         if ($format eq 'rss') {
7790                 print <<XML;
7791 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7792 <channel>
7793 XML
7794                 print "<title>$title</title>\n" .
7795                       "<link>$alt_url</link>\n" .
7796                       "<description>$descr</description>\n" .
7797                       "<language>en</language>\n" .
7798                       # project owner is responsible for 'editorial' content
7799                       "<managingEditor>$owner</managingEditor>\n";
7800                 if (defined $logo || defined $favicon) {
7801                         # prefer the logo to the favicon, since RSS
7802                         # doesn't allow both
7803                         my $img = esc_url($logo || $favicon);
7804                         print "<image>\n" .
7805                               "<url>$img</url>\n" .
7806                               "<title>$title</title>\n" .
7807                               "<link>$alt_url</link>\n" .
7808                               "</image>\n";
7809                 }
7810                 if (%latest_date) {
7811                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7812                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7813                 }
7814                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7815         } elsif ($format eq 'atom') {
7816                 print <<XML;
7817 <feed xmlns="http://www.w3.org/2005/Atom">
7818 XML
7819                 print "<title>$title</title>\n" .
7820                       "<subtitle>$descr</subtitle>\n" .
7821                       '<link rel="alternate" type="text/html" href="' .
7822                       $alt_url . '" />' . "\n" .
7823                       '<link rel="self" type="' . $content_type . '" href="' .
7824                       $cgi->self_url() . '" />' . "\n" .
7825                       "<id>" . href(-full=>1) . "</id>\n" .
7826                       # use project owner for feed author
7827                       "<author><name>$owner</name></author>\n";
7828                 if (defined $favicon) {
7829                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7830                 }
7831                 if (defined $logo) {
7832                         # not twice as wide as tall: 72 x 27 pixels
7833                         print "<logo>" . esc_url($logo) . "</logo>\n";
7834                 }
7835                 if (! %latest_date) {
7836                         # dummy date to keep the feed valid until commits trickle in:
7837                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7838                 } else {
7839                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7840                 }
7841                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7842         }
7843
7844         # contents
7845         for (my $i = 0; $i <= $#commitlist; $i++) {
7846                 my %co = %{$commitlist[$i]};
7847                 my $commit = $co{'id'};
7848                 # we read 150, we always show 30 and the ones more recent than 48 hours
7849                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7850                         last;
7851                 }
7852                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7853
7854                 # get list of changed files
7855                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7856                         $co{'parent'} || "--root",
7857                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7858                         or next;
7859                 my @difftree = map { chomp; $_ } <$fd>;
7860                 close $fd
7861                         or next;
7862
7863                 # print element (entry, item)
7864                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7865                 if ($format eq 'rss') {
7866                         print "<item>\n" .
7867                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7868                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7869                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7870                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7871                               "<link>$co_url</link>\n" .
7872                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7873                               "<content:encoded>" .
7874                               "<![CDATA[\n";
7875                 } elsif ($format eq 'atom') {
7876                         print "<entry>\n" .
7877                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7878                               "<updated>$cd{'iso-8601'}</updated>\n" .
7879                               "<author>\n" .
7880                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7881                         if ($co{'author_email'}) {
7882                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7883                         }
7884                         print "</author>\n" .
7885                               # use committer for contributor
7886                               "<contributor>\n" .
7887                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7888                         if ($co{'committer_email'}) {
7889                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7890                         }
7891                         print "</contributor>\n" .
7892                               "<published>$cd{'iso-8601'}</published>\n" .
7893                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7894                               "<id>$co_url</id>\n" .
7895                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7896                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7897                 }
7898                 my $comment = $co{'comment'};
7899                 print "<pre>\n";
7900                 foreach my $line (@$comment) {
7901                         $line = esc_html($line);
7902                         print "$line\n";
7903                 }
7904                 print "</pre><ul>\n";
7905                 foreach my $difftree_line (@difftree) {
7906                         my %difftree = parse_difftree_raw_line($difftree_line);
7907                         next if !$difftree{'from_id'};
7908
7909                         my $file = $difftree{'file'} || $difftree{'to_file'};
7910
7911                         print "<li>" .
7912                               "[" .
7913                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7914                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7915                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7916                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7917                                       -title => "diff"}, 'D');
7918                         if ($have_blame) {
7919                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7920                                                              file_name=>$file, hash_base=>$commit),
7921                                               -title => "blame"}, 'B');
7922                         }
7923                         # if this is not a feed of a file history
7924                         if (!defined $file_name || $file_name ne $file) {
7925                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7926                                                              file_name=>$file, hash=>$commit),
7927                                               -title => "history"}, 'H');
7928                         }
7929                         $file = esc_path($file);
7930                         print "] ".
7931                               "$file</li>\n";
7932                 }
7933                 if ($format eq 'rss') {
7934                         print "</ul>]]>\n" .
7935                               "</content:encoded>\n" .
7936                               "</item>\n";
7937                 } elsif ($format eq 'atom') {
7938                         print "</ul>\n</div>\n" .
7939                               "</content>\n" .
7940                               "</entry>\n";
7941                 }
7942         }
7943
7944         # end of feed
7945         if ($format eq 'rss') {
7946                 print "</channel>\n</rss>\n";
7947         } elsif ($format eq 'atom') {
7948                 print "</feed>\n";
7949         }
7950 }
7951
7952 sub git_rss {
7953         git_feed('rss');
7954 }
7955
7956 sub git_atom {
7957         git_feed('atom');
7958 }
7959
7960 sub git_opml {
7961         my @list = git_get_projects_list();
7962         if (!@list) {
7963                 die_error(404, "No projects found");
7964         }
7965
7966         print $cgi->header(
7967                 -type => 'text/xml',
7968                 -charset => 'utf-8',
7969                 -content_disposition => 'inline; filename="opml.xml"');
7970
7971         my $title = esc_html($site_name);
7972         print <<XML;
7973 <?xml version="1.0" encoding="utf-8"?>
7974 <opml version="1.0">
7975 <head>
7976   <title>$title OPML Export</title>
7977 </head>
7978 <body>
7979 <outline text="git RSS feeds">
7980 XML
7981
7982         foreach my $pr (@list) {
7983                 my %proj = %$pr;
7984                 my $head = git_get_head_hash($proj{'path'});
7985                 if (!defined $head) {
7986                         next;
7987                 }
7988                 $git_dir = "$projectroot/$proj{'path'}";
7989                 my %co = parse_commit($head);
7990                 if (!%co) {
7991                         next;
7992                 }
7993
7994                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7995                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7996                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7997                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7998         }
7999         print <<XML;
8000 </outline>
8001 </body>
8002 </opml>
8003 XML
8004 }