Lady’s Gitweb - Gitweb/blob - 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 $path_info = decode_utf8($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
 102 # URI of GIT logo (72x27 size)
 103 our $logo = "++GITWEB_LOGO++";
 104 # URI of GIT favicon, assumed to be image/png type
 105 our $favicon = "++GITWEB_FAVICON++";
 106 # URI of gitweb.js (JavaScript code for gitweb)
 107 our $javascript = "++GITWEB_JS++";
 108
 109 # URI and label (title) of GIT logo link
 110 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 111 #our $logo_label = "git documentation";
 112 our $logo_url = "http://git-scm.com/";
 113 our $logo_label = "git homepage";
 114
 115 # source of projects list
 116 our $projects_list = "++GITWEB_LIST++";
 117
 118 # the width (in characters) of the projects list "Description" column
 119 our $projects_list_description_width = 25;
 120
 121 # group projects by category on the projects list
 122 # (enabled if this variable evaluates to true)
 123 our $projects_list_group_categories = 0;
 124
 125 # default category if none specified
 126 # (leave the empty string for no category)
 127 our $project_list_default_category = "";
 128
 129 # default order of projects list
 130 # valid values are none, project, descr, owner, and age
 131 our $default_projects_order = "project";
 132
 133 # show repository only if this file exists
 134 # (only effective if this variable evaluates to true)
 135 our $export_ok = "++GITWEB_EXPORT_OK++";
 136
 137 # show repository only if this subroutine returns true
 138 # when given the path to the project, for example:
 139 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 140 our $export_auth_hook = undef;
 141
 142 # only allow viewing of repositories also shown on the overview page
 143 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 144
 145 # list of git base URLs used for URL to where fetch project from,
 146 # i.e. full URL is "$git_base_url/$project"
 147 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 148
 149 # default blob_plain mimetype and default charset for text/plain blob
 150 our $default_blob_plain_mimetype = 'text/plain';
 151 our $default_text_plain_charset  = undef;
 152
 153 # file to use for guessing MIME types before trying /etc/mime.types
 154 # (relative to the current git repository)
 155 our $mimetypes_file = undef;
 156
 157 # assume this charset if line contains non-UTF-8 characters;
 158 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 159 # for which encoding all byte sequences are valid, for example
 160 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 161 # could be even 'utf-8' for the old behavior)
 162 our $fallback_encoding = 'latin1';
 163
 164 # rename detection options for git-diff and git-diff-tree
 165 # - default is '-M', with the cost proportional to
 166 #   (number of removed files) * (number of new files).
 167 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 168 #   (number of changed files + number of removed files) * (number of new files)
 169 # - even more costly is '-C', '--find-copies-harder' with cost
 170 #   (number of files in the original tree) * (number of new files)
 171 # - one might want to include '-B' option, e.g. '-B', '-M'
 172 our @diff_opts = ('-M'); # taken from git_commit
 173
 174 # Disables features that would allow repository owners to inject script into
 175 # the gitweb domain.
 176 our $prevent_xss = 0;
 177
 178 # Path to the highlight executable to use (must be the one from
 179 # http://www.andre-simon.de due to assumptions about parameters and output).
 180 # Useful if highlight is not installed on your webserver's PATH.
 181 # [Default: highlight]
 182 our $highlight_bin = "++HIGHLIGHT_BIN++";
 183
 184 # information about snapshot formats that gitweb is capable of serving
 185 our %known_snapshot_formats = (
 186         # name => {
 187         #       'display' => display name,
 188         #       'type' => mime type,
 189         #       'suffix' => filename suffix,
 190         #       'format' => --format for git-archive,
 191         #       'compressor' => [compressor command and arguments]
 192         #                       (array reference, optional)
 193         #       'disabled' => boolean (optional)}
 194         #
 195         'tgz' => {
 196                 'display' => 'tar.gz',
 197                 'type' => 'application/x-gzip',
 198                 'suffix' => '.tar.gz',
 199                 'format' => 'tar',
 200                 'compressor' => ['gzip', '-n']},
 201
 202         'tbz2' => {
 203                 'display' => 'tar.bz2',
 204                 'type' => 'application/x-bzip2',
 205                 'suffix' => '.tar.bz2',
 206                 'format' => 'tar',
 207                 'compressor' => ['bzip2']},
 208
 209         'txz' => {
 210                 'display' => 'tar.xz',
 211                 'type' => 'application/x-xz',
 212                 'suffix' => '.tar.xz',
 213                 'format' => 'tar',
 214                 'compressor' => ['xz'],
 215                 'disabled' => 1},
 216
 217         'zip' => {
 218                 'display' => 'zip',
 219                 'type' => 'application/x-zip',
 220                 'suffix' => '.zip',
 221                 'format' => 'zip'},
 222 );
 223
 224 # Aliases so we understand old gitweb.snapshot values in repository
 225 # configuration.
 226 our %known_snapshot_format_aliases = (
 227         'gzip'  => 'tgz',
 228         'bzip2' => 'tbz2',
 229         'xz'    => 'txz',
 230
 231         # backward compatibility: legacy gitweb config support
 232         'x-gzip' => undef, 'gz' => undef,
 233         'x-bzip2' => undef, 'bz2' => undef,
 234         'x-zip' => undef, '' => undef,
 235 );
 236
 237 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 238 # are changed, it may be appropriate to change these values too via
 239 # $GITWEB_CONFIG.
 240 our %avatar_size = (
 241         'default' => 16,
 242         'double'  => 32
 243 );
 244
 245 # Used to set the maximum load that we will still respond to gitweb queries.
 246 # If server load exceed this value then return "503 server busy" error.
 247 # If gitweb cannot determined server load, it is taken to be 0.
 248 # Leave it undefined (or set to 'undef') to turn off load checking.
 249 our $maxload = 300;
 250
 251 # configuration for 'highlight' (http://www.andre-simon.de/)
 252 # match by basename
 253 our %highlight_basename = (
 254         #'Program' => 'py',
 255         #'Library' => 'py',
 256         'SConstruct' => 'py', # SCons equivalent of Makefile
 257         'Makefile' => 'make',
 258 );
 259 # match by extension
 260 our %highlight_ext = (
 261         # main extensions, defining name of syntax;
 262         # see files in /usr/share/highlight/langDefs/ directory
 263         map { $_ => $_ }
 264                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 265         # alternate extensions, see /etc/highlight/filetypes.conf
 266         'h' => 'c',
 267         map { $_ => 'sh'  } qw(bash zsh ksh),
 268         map { $_ => 'cpp' } qw(cxx c++ cc),
 269         map { $_ => 'php' } qw(php3 php4 php5 phps),
 270         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 271         map { $_ => 'make'} qw(mak mk),
 272         map { $_ => 'xml' } qw(xhtml html htm),
 273 );
 274
 275 # You define site-wide feature defaults here; override them with
 276 # $GITWEB_CONFIG as necessary.
 277 our %feature = (
 278         # feature => {
 279         #       'sub' => feature-sub (subroutine),
 280         #       'override' => allow-override (boolean),
 281         #       'default' => [ default options...] (array reference)}
 282         #
 283         # if feature is overridable (it means that allow-override has true value),
 284         # then feature-sub will be called with default options as parameters;
 285         # return value of feature-sub indicates if to enable specified feature
 286         #
 287         # if there is no 'sub' key (no feature-sub), then feature cannot be
 288         # overridden
 289         #
 290         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 291         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 292         # is enabled
 293
 294         # Enable the 'blame' blob view, showing the last commit that modified
 295         # each line in the file. This can be very CPU-intensive.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'blame'}{'default'} = [1];
 299         # To have project specific config enable override in $GITWEB_CONFIG
 300         # $feature{'blame'}{'override'} = 1;
 301         # and in project config gitweb.blame = 0|1;
 302         'blame' => {
 303                 'sub' => sub { feature_bool('blame', @_) },
 304                 'override' => 0,
 305                 'default' => [0]},
 306
 307         # Enable the 'snapshot' link, providing a compressed archive of any
 308         # tree. This can potentially generate high traffic if you have large
 309         # project.
 310
 311         # Value is a list of formats defined in %known_snapshot_formats that
 312         # you wish to offer.
 313         # To disable system wide have in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'default'} = [];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'snapshot'}{'override'} = 1;
 317         # and in project config, a comma-separated list of formats or "none"
 318         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 319         'snapshot' => {
 320                 'sub' => \&feature_snapshot,
 321                 'override' => 0,
 322                 'default' => ['tgz']},
 323
 324         # Enable text search, which will list the commits which match author,
 325         # committer or commit text to a given string.  Enabled by default.
 326         # Project specific override is not supported.
 327         #
 328         # Note that this controls all search features, which means that if
 329         # it is disabled, then 'grep' and 'pickaxe' search would also be
 330         # disabled.
 331         'search' => {
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable grep search, which will list the files in currently selected
 336         # tree containing the given string. Enabled by default. This can be
 337         # potentially CPU-intensive, of course.
 338         # Note that you need to have 'search' feature enabled too.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'grep'}{'default'} = [1];
 342         # To have project specific config enable override in $GITWEB_CONFIG
 343         # $feature{'grep'}{'override'} = 1;
 344         # and in project config gitweb.grep = 0|1;
 345         'grep' => {
 346                 'sub' => sub { feature_bool('grep', @_) },
 347                 'override' => 0,
 348                 'default' => [1]},
 349
 350         # Enable the pickaxe search, which will list the commits that modified
 351         # a given string in a file. This can be practical and quite faster
 352         # alternative to 'blame', but still potentially CPU-intensive.
 353         # Note that you need to have 'search' feature enabled too.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'pickaxe'}{'default'} = [1];
 357         # To have project specific config enable override in $GITWEB_CONFIG
 358         # $feature{'pickaxe'}{'override'} = 1;
 359         # and in project config gitweb.pickaxe = 0|1;
 360         'pickaxe' => {
 361                 'sub' => sub { feature_bool('pickaxe', @_) },
 362                 'override' => 0,
 363                 'default' => [1]},
 364
 365         # Enable showing size of blobs in a 'tree' view, in a separate
 366         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 367
 368         # To disable system wide have in $GITWEB_CONFIG
 369         # $feature{'show-sizes'}{'default'} = [0];
 370         # To have project specific config enable override in $GITWEB_CONFIG
 371         # $feature{'show-sizes'}{'override'} = 1;
 372         # and in project config gitweb.showsizes = 0|1;
 373         'show-sizes' => {
 374                 'sub' => sub { feature_bool('showsizes', @_) },
 375                 'override' => 0,
 376                 'default' => [1]},
 377
 378         # Make gitweb use an alternative format of the URLs which can be
 379         # more readable and natural-looking: project name is embedded
 380         # directly in the path and the query string contains other
 381         # auxiliary information. All gitweb installations recognize
 382         # URL in either format; this configures in which formats gitweb
 383         # generates links.
 384
 385         # To enable system wide have in $GITWEB_CONFIG
 386         # $feature{'pathinfo'}{'default'} = [1];
 387         # Project specific override is not supported.
 388
 389         # Note that you will need to change the default location of CSS,
 390         # favicon, logo and possibly other files to an absolute URL. Also,
 391         # if gitweb.cgi serves as your indexfile, you will need to force
 392         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 393         'pathinfo' => {
 394                 'override' => 0,
 395                 'default' => [0]},
 396
 397         # Make gitweb consider projects in project root subdirectories
 398         # to be forks of existing projects. Given project $projname.git,
 399         # projects matching $projname/*.git will not be shown in the main
 400         # projects list, instead a '+' mark will be added to $projname
 401         # there and a 'forks' view will be enabled for the project, listing
 402         # all the forks. If project list is taken from a file, forks have
 403         # to be listed after the main project.
 404
 405         # To enable system wide have in $GITWEB_CONFIG
 406         # $feature{'forks'}{'default'} = [1];
 407         # Project specific override is not supported.
 408         'forks' => {
 409                 'override' => 0,
 410                 'default' => [0]},
 411
 412         # Insert custom links to the action bar of all project pages.
 413         # This enables you mainly to link to third-party scripts integrating
 414         # into gitweb; e.g. git-browser for graphical history representation
 415         # or custom web-based repository administration interface.
 416
 417         # The 'default' value consists of a list of triplets in the form
 418         # (label, link, position) where position is the label after which
 419         # to insert the link and link is a format string where %n expands
 420         # to the project name, %f to the project path within the filesystem,
 421         # %h to the current hash (h gitweb parameter) and %b to the current
 422         # hash base (hb gitweb parameter); %% expands to %.
 423
 424         # To enable system wide have in $GITWEB_CONFIG e.g.
 425         # $feature{'actions'}{'default'} = [('graphiclog',
 426         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 427         # Project specific override is not supported.
 428         'actions' => {
 429                 'override' => 0,
 430                 'default' => []},
 431
 432         # Allow gitweb scan project content tags of project repository,
 433         # and display the popular Web 2.0-ish "tag cloud" near the projects
 434         # list.  Note that this is something COMPLETELY different from the
 435         # normal Git tags.
 436
 437         # gitweb by itself can show existing tags, but it does not handle
 438         # tagging itself; you need to do it externally, outside gitweb.
 439         # The format is described in git_get_project_ctags() subroutine.
 440         # You may want to install the HTML::TagCloud Perl module to get
 441         # a pretty tag cloud instead of just a list of tags.
 442
 443         # To enable system wide have in $GITWEB_CONFIG
 444         # $feature{'ctags'}{'default'} = [1];
 445         # Project specific override is not supported.
 446
 447         # In the future whether ctags editing is enabled might depend
 448         # on the value, but using 1 should always mean no editing of ctags.
 449         'ctags' => {
 450                 'override' => 0,
 451                 'default' => [0]},
 452
 453         # The maximum number of patches in a patchset generated in patch
 454         # view. Set this to 0 or undef to disable patch view, or to a
 455         # negative number to remove any limit.
 456
 457         # To disable system wide have in $GITWEB_CONFIG
 458         # $feature{'patches'}{'default'} = [0];
 459         # To have project specific config enable override in $GITWEB_CONFIG
 460         # $feature{'patches'}{'override'} = 1;
 461         # and in project config gitweb.patches = 0|n;
 462         # where n is the maximum number of patches allowed in a patchset.
 463         'patches' => {
 464                 'sub' => \&feature_patches,
 465                 'override' => 0,
 466                 'default' => [16]},
 467
 468         # Avatar support. When this feature is enabled, views such as
 469         # shortlog or commit will display an avatar associated with
 470         # the email of the committer(s) and/or author(s).
 471
 472         # Currently available providers are gravatar and picon.
 473         # If an unknown provider is specified, the feature is disabled.
 474
 475         # Gravatar depends on Digest::MD5.
 476         # Picon currently relies on the indiana.edu database.
 477
 478         # To enable system wide have in $GITWEB_CONFIG
 479         # $feature{'avatar'}{'default'} = ['<provider>'];
 480         # where <provider> is either gravatar or picon.
 481         # To have project specific config enable override in $GITWEB_CONFIG
 482         # $feature{'avatar'}{'override'} = 1;
 483         # and in project config gitweb.avatar = <provider>;
 484         'avatar' => {
 485                 'sub' => \&feature_avatar,
 486                 'override' => 0,
 487                 'default' => ['']},
 488
 489         # Enable displaying how much time and how many git commands
 490         # it took to generate and display page.  Disabled by default.
 491         # Project specific override is not supported.
 492         'timed' => {
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable turning some links into links to actions which require
 497         # JavaScript to run (like 'blame_incremental').  Not enabled by
 498         # default.  Project specific override is currently not supported.
 499         'javascript-actions' => {
 500                 'override' => 0,
 501                 'default' => [0]},
 502
 503         # Enable and configure ability to change common timezone for dates
 504         # in gitweb output via JavaScript.  Enabled by default.
 505         # Project specific override is not supported.
 506         'javascript-timezone' => {
 507                 'override' => 0,
 508                 'default' => [
 509                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 510                                      # or undef to turn off this feature
 511                         'gitweb_tz', # name of cookie where to store selected timezone
 512                         'datetime',  # CSS class used to mark up dates for manipulation
 513                 ]},
 514
 515         # Syntax highlighting support. This is based on Daniel Svensson's
 516         # and Sham Chukoury's work in gitweb-xmms2.git.
 517         # It requires the 'highlight' program present in $PATH,
 518         # and therefore is disabled by default.
 519
 520         # To enable system wide have in $GITWEB_CONFIG
 521         # $feature{'highlight'}{'default'} = [1];
 522
 523         'highlight' => {
 524                 'sub' => sub { feature_bool('highlight', @_) },
 525                 'override' => 0,
 526                 'default' => [0]},
 527
 528         # Enable displaying of remote heads in the heads list
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'remote_heads'}{'default'} = [1];
 532         # To have project specific config enable override in $GITWEB_CONFIG
 533         # $feature{'remote_heads'}{'override'} = 1;
 534         # and in project config gitweb.remote_heads = 0|1;
 535         'remote_heads' => {
 536                 'sub' => sub { feature_bool('remote_heads', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539 );
 540
 541 sub gitweb_get_feature {
 542         my ($name) = @_;
 543         return unless exists $feature{$name};
 544         my ($sub, $override, @defaults) = (
 545                 $feature{$name}{'sub'},
 546                 $feature{$name}{'override'},
 547                 @{$feature{$name}{'default'}});
 548         # project specific override is possible only if we have project
 549         our $git_dir; # global variable, declared later
 550         if (!$override || !defined $git_dir) {
 551                 return @defaults;
 552         }
 553         if (!defined $sub) {
 554                 warn "feature $name is not overridable";
 555                 return @defaults;
 556         }
 557         return $sub->(@defaults);
 558 }
 559
 560 # A wrapper to check if a given feature is enabled.
 561 # With this, you can say
 562 #
 563 #   my $bool_feat = gitweb_check_feature('bool_feat');
 564 #   gitweb_check_feature('bool_feat') or somecode;
 565 #
 566 # instead of
 567 #
 568 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 569 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 570 #
 571 sub gitweb_check_feature {
 572         return (gitweb_get_feature(@_))[0];
 573 }
 574
 575
 576 sub feature_bool {
 577         my $key = shift;
 578         my ($val) = git_get_project_config($key, '--bool');
 579
 580         if (!defined $val) {
 581                 return ($_[0]);
 582         } elsif ($val eq 'true') {
 583                 return (1);
 584         } elsif ($val eq 'false') {
 585                 return (0);
 586         }
 587 }
 588
 589 sub feature_snapshot {
 590         my (@fmts) = @_;
 591
 592         my ($val) = git_get_project_config('snapshot');
 593
 594         if ($val) {
 595                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 596         }
 597
 598         return @fmts;
 599 }
 600
 601 sub feature_patches {
 602         my @val = (git_get_project_config('patches', '--int'));
 603
 604         if (@val) {
 605                 return @val;
 606         }
 607
 608         return ($_[0]);
 609 }
 610
 611 sub feature_avatar {
 612         my @val = (git_get_project_config('avatar'));
 613
 614         return @val ? @val : @_;
 615 }
 616
 617 # checking HEAD file with -e is fragile if the repository was
 618 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 619 # and then pruned.
 620 sub check_head_link {
 621         my ($dir) = @_;
 622         my $headfile = "$dir/HEAD";
 623         return ((-e $headfile) ||
 624                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 625 }
 626
 627 sub check_export_ok {
 628         my ($dir) = @_;
 629         return (check_head_link($dir) &&
 630                 (!$export_ok || -e "$dir/$export_ok") &&
 631                 (!$export_auth_hook || $export_auth_hook->($dir)));
 632 }
 633
 634 # process alternate names for backward compatibility
 635 # filter out unsupported (unknown) snapshot formats
 636 sub filter_snapshot_fmts {
 637         my @fmts = @_;
 638
 639         @fmts = map {
 640                 exists $known_snapshot_format_aliases{$_} ?
 641                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 642         @fmts = grep {
 643                 exists $known_snapshot_formats{$_} &&
 644                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 645 }
 646
 647 # If it is set to code reference, it is code that it is to be run once per
 648 # request, allowing updating configurations that change with each request,
 649 # while running other code in config file only once.
 650 #
 651 # Otherwise, if it is false then gitweb would process config file only once;
 652 # if it is true then gitweb config would be run for each request.
 653 our $per_request_config = 1;
 654
 655 # read and parse gitweb config file given by its parameter.
 656 # returns true on success, false on recoverable error, allowing
 657 # to chain this subroutine, using first file that exists.
 658 # dies on errors during parsing config file, as it is unrecoverable.
 659 sub read_config_file {
 660         my $filename = shift;
 661         return unless defined $filename;
 662         # die if there are errors parsing config file
 663         if (-e $filename) {
 664                 do $filename;
 665                 die $@ if $@;
 666                 return 1;
 667         }
 668         return;
 669 }
 670
 671 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 672 sub evaluate_gitweb_config {
 673         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 674         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 675         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 676
 677         # Protect agains duplications of file names, to not read config twice.
 678         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 679         # there possibility of duplication of filename there doesn't matter.
 680         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 681         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 682
 683         # Common system-wide settings for convenience.
 684         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 685         read_config_file($GITWEB_CONFIG_COMMON);
 686
 687         # Use first config file that exists.  This means use the per-instance
 688         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 689         read_config_file($GITWEB_CONFIG) and return;
 690         read_config_file($GITWEB_CONFIG_SYSTEM);
 691 }
 692
 693 # Get loadavg of system, to compare against $maxload.
 694 # Currently it requires '/proc/loadavg' present to get loadavg;
 695 # if it is not present it returns 0, which means no load checking.
 696 sub get_loadavg {
 697         if( -e '/proc/loadavg' ){
 698                 open my $fd, '<', '/proc/loadavg'
 699                         or return 0;
 700                 my @load = split(/\s+/, scalar <$fd>);
 701                 close $fd;
 702
 703                 # The first three columns measure CPU and IO utilization of the last one,
 704                 # five, and 10 minute periods.  The fourth column shows the number of
 705                 # currently running processes and the total number of processes in the m/n
 706                 # format.  The last column displays the last process ID used.
 707                 return $load[0] || 0;
 708         }
 709         # additional checks for load average should go here for things that don't export
 710         # /proc/loadavg
 711
 712         return 0;
 713 }
 714
 715 # version of the core git binary
 716 our $git_version;
 717 sub evaluate_git_version {
 718         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 719         $number_of_git_cmds++;
 720 }
 721
 722 sub check_loadavg {
 723         if (defined $maxload && get_loadavg() > $maxload) {
 724                 die_error(503, "The load average on the server is too high");
 725         }
 726 }
 727
 728 # ======================================================================
 729 # input validation and dispatch
 730
 731 # input parameters can be collected from a variety of sources (presently, CGI
 732 # and PATH_INFO), so we define an %input_params hash that collects them all
 733 # together during validation: this allows subsequent uses (e.g. href()) to be
 734 # agnostic of the parameter origin
 735
 736 our %input_params = ();
 737
 738 # input parameters are stored with the long parameter name as key. This will
 739 # also be used in the href subroutine to convert parameters to their CGI
 740 # equivalent, and since the href() usage is the most frequent one, we store
 741 # the name -> CGI key mapping here, instead of the reverse.
 742 #
 743 # XXX: Warning: If you touch this, check the search form for updating,
 744 # too.
 745
 746 our @cgi_param_mapping = (
 747         project => "p",
 748         action => "a",
 749         file_name => "f",
 750         file_parent => "fp",
 751         hash => "h",
 752         hash_parent => "hp",
 753         hash_base => "hb",
 754         hash_parent_base => "hpb",
 755         page => "pg",
 756         order => "o",
 757         searchtext => "s",
 758         searchtype => "st",
 759         snapshot_format => "sf",
 760         extra_options => "opt",
 761         search_use_regexp => "sr",
 762         ctag => "by_tag",
 763         diff_style => "ds",
 764         project_filter => "pf",
 765         # this must be last entry (for manipulation from JavaScript)
 766         javascript => "js"
 767 );
 768 our %cgi_param_mapping = @cgi_param_mapping;
 769
 770 # we will also need to know the possible actions, for validation
 771 our %actions = (
 772         "blame" => \&git_blame,
 773         "blame_incremental" => \&git_blame_incremental,
 774         "blame_data" => \&git_blame_data,
 775         "blobdiff" => \&git_blobdiff,
 776         "blobdiff_plain" => \&git_blobdiff_plain,
 777         "blob" => \&git_blob,
 778         "blob_plain" => \&git_blob_plain,
 779         "commitdiff" => \&git_commitdiff,
 780         "commitdiff_plain" => \&git_commitdiff_plain,
 781         "commit" => \&git_commit,
 782         "forks" => \&git_forks,
 783         "heads" => \&git_heads,
 784         "history" => \&git_history,
 785         "log" => \&git_log,
 786         "patch" => \&git_patch,
 787         "patches" => \&git_patches,
 788         "remotes" => \&git_remotes,
 789         "rss" => \&git_rss,
 790         "atom" => \&git_atom,
 791         "search" => \&git_search,
 792         "search_help" => \&git_search_help,
 793         "shortlog" => \&git_shortlog,
 794         "summary" => \&git_summary,
 795         "tag" => \&git_tag,
 796         "tags" => \&git_tags,
 797         "tree" => \&git_tree,
 798         "snapshot" => \&git_snapshot,
 799         "object" => \&git_object,
 800         # those below don't need $project
 801         "opml" => \&git_opml,
 802         "project_list" => \&git_project_list,
 803         "project_index" => \&git_project_index,
 804 );
 805
 806 # finally, we have the hash of allowed extra_options for the commands that
 807 # allow them
 808 our %allowed_options = (
 809         "--no-merges" => [ qw(rss atom log shortlog history) ],
 810 );
 811
 812 # fill %input_params with the CGI parameters. All values except for 'opt'
 813 # should be single values, but opt can be an array. We should probably
 814 # build an array of parameters that can be multi-valued, but since for the time
 815 # being it's only this one, we just single it out
 816 sub evaluate_query_params {
 817         our $cgi;
 818
 819         while (my ($name, $symbol) = each %cgi_param_mapping) {
 820                 if ($symbol eq 'opt') {
 821                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 822                 } else {
 823                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 824                 }
 825         }
 826 }
 827
 828 # now read PATH_INFO and update the parameter list for missing parameters
 829 sub evaluate_path_info {
 830         return if defined $input_params{'project'};
 831         return if !$path_info;
 832         $path_info =~ s,^/+,,;
 833         return if !$path_info;
 834
 835         # find which part of PATH_INFO is project
 836         my $project = $path_info;
 837         $project =~ s,/+$,,;
 838         while ($project && !check_head_link("$projectroot/$project")) {
 839                 $project =~ s,/*[^/]*$,,;
 840         }
 841         return unless $project;
 842         $input_params{'project'} = $project;
 843
 844         # do not change any parameters if an action is given using the query string
 845         return if $input_params{'action'};
 846         $path_info =~ s,^\Q$project\E/*,,;
 847
 848         # next, check if we have an action
 849         my $action = $path_info;
 850         $action =~ s,/.*$,,;
 851         if (exists $actions{$action}) {
 852                 $path_info =~ s,^$action/*,,;
 853                 $input_params{'action'} = $action;
 854         }
 855
 856         # list of actions that want hash_base instead of hash, but can have no
 857         # pathname (f) parameter
 858         my @wants_base = (
 859                 'tree',
 860                 'history',
 861         );
 862
 863         # we want to catch, among others
 864         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 865         my ($parentrefname, $parentpathname, $refname, $pathname) =
 866                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 867
 868         # first, analyze the 'current' part
 869         if (defined $pathname) {
 870                 # we got "branch:filename" or "branch:dir/"
 871                 # we could use git_get_type(branch:pathname), but:
 872                 # - it needs $git_dir
 873                 # - it does a git() call
 874                 # - the convention of terminating directories with a slash
 875                 #   makes it superfluous
 876                 # - embedding the action in the PATH_INFO would make it even
 877                 #   more superfluous
 878                 $pathname =~ s,^/+,,;
 879                 if (!$pathname || substr($pathname, -1) eq "/") {
 880                         $input_params{'action'} ||= "tree";
 881                         $pathname =~ s,/$,,;
 882                 } else {
 883                         # the default action depends on whether we had parent info
 884                         # or not
 885                         if ($parentrefname) {
 886                                 $input_params{'action'} ||= "blobdiff_plain";
 887                         } else {
 888                                 $input_params{'action'} ||= "blob_plain";
 889                         }
 890                 }
 891                 $input_params{'hash_base'} ||= $refname;
 892                 $input_params{'file_name'} ||= $pathname;
 893         } elsif (defined $refname) {
 894                 # we got "branch". In this case we have to choose if we have to
 895                 # set hash or hash_base.
 896                 #
 897                 # Most of the actions without a pathname only want hash to be
 898                 # set, except for the ones specified in @wants_base that want
 899                 # hash_base instead. It should also be noted that hand-crafted
 900                 # links having 'history' as an action and no pathname or hash
 901                 # set will fail, but that happens regardless of PATH_INFO.
 902                 if (defined $parentrefname) {
 903                         # if there is parent let the default be 'shortlog' action
 904                         # (for http://git.example.com/repo.git/A..B links); if there
 905                         # is no parent, dispatch will detect type of object and set
 906                         # action appropriately if required (if action is not set)
 907                         $input_params{'action'} ||= "shortlog";
 908                 }
 909                 if ($input_params{'action'} &&
 910                     grep { $_ eq $input_params{'action'} } @wants_base) {
 911                         $input_params{'hash_base'} ||= $refname;
 912                 } else {
 913                         $input_params{'hash'} ||= $refname;
 914                 }
 915         }
 916
 917         # next, handle the 'parent' part, if present
 918         if (defined $parentrefname) {
 919                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 920                 # someproject/blobdiff/oldrev..newrev:/filename
 921                 if ($parentpathname) {
 922                         $parentpathname =~ s,^/+,,;
 923                         $parentpathname =~ s,/$,,;
 924                         $input_params{'file_parent'} ||= $parentpathname;
 925                 } else {
 926                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 927                 }
 928                 # we assume that hash_parent_base is wanted if a path was specified,
 929                 # or if the action wants hash_base instead of hash
 930                 if (defined $input_params{'file_parent'} ||
 931                         grep { $_ eq $input_params{'action'} } @wants_base) {
 932                         $input_params{'hash_parent_base'} ||= $parentrefname;
 933                 } else {
 934                         $input_params{'hash_parent'} ||= $parentrefname;
 935                 }
 936         }
 937
 938         # for the snapshot action, we allow URLs in the form
 939         # $project/snapshot/$hash.ext
 940         # where .ext determines the snapshot and gets removed from the
 941         # passed $refname to provide the $hash.
 942         #
 943         # To be able to tell that $refname includes the format extension, we
 944         # require the following two conditions to be satisfied:
 945         # - the hash input parameter MUST have been set from the $refname part
 946         #   of the URL (i.e. they must be equal)
 947         # - the snapshot format MUST NOT have been defined already (e.g. from
 948         #   CGI parameter sf)
 949         # It's also useless to try any matching unless $refname has a dot,
 950         # so we check for that too
 951         if (defined $input_params{'action'} &&
 952                 $input_params{'action'} eq 'snapshot' &&
 953                 defined $refname && index($refname, '.') != -1 &&
 954                 $refname eq $input_params{'hash'} &&
 955                 !defined $input_params{'snapshot_format'}) {
 956                 # We loop over the known snapshot formats, checking for
 957                 # extensions. Allowed extensions are both the defined suffix
 958                 # (which includes the initial dot already) and the snapshot
 959                 # format key itself, with a prepended dot
 960                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 961                         my $hash = $refname;
 962                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 963                                 next;
 964                         }
 965                         my $sfx = $1;
 966                         # a valid suffix was found, so set the snapshot format
 967                         # and reset the hash parameter
 968                         $input_params{'snapshot_format'} = $fmt;
 969                         $input_params{'hash'} = $hash;
 970                         # we also set the format suffix to the one requested
 971                         # in the URL: this way a request for e.g. .tgz returns
 972                         # a .tgz instead of a .tar.gz
 973                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 974                         last;
 975                 }
 976         }
 977 }
 978
 979 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 980      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 981      $searchtext, $search_regexp, $project_filter);
 982 sub evaluate_and_validate_params {
 983         our $action = $input_params{'action'};
 984         if (defined $action) {
 985                 if (!validate_action($action)) {
 986                         die_error(400, "Invalid action parameter");
 987                 }
 988         }
 989
 990         # parameters which are pathnames
 991         our $project = $input_params{'project'};
 992         if (defined $project) {
 993                 if (!validate_project($project)) {
 994                         undef $project;
 995                         die_error(404, "No such project");
 996                 }
 997         }
 998
 999         our $project_filter = $input_params{'project_filter'};
1000         if (defined $project_filter) {
1001                 if (!validate_pathname($project_filter)) {
1002                         die_error(404, "Invalid project_filter parameter");
1003                 }
1004         }
1005
1006         our $file_name = $input_params{'file_name'};
1007         if (defined $file_name) {
1008                 if (!validate_pathname($file_name)) {
1009                         die_error(400, "Invalid file parameter");
1010                 }
1011         }
1012
1013         our $file_parent = $input_params{'file_parent'};
1014         if (defined $file_parent) {
1015                 if (!validate_pathname($file_parent)) {
1016                         die_error(400, "Invalid file parent parameter");
1017                 }
1018         }
1019
1020         # parameters which are refnames
1021         our $hash = $input_params{'hash'};
1022         if (defined $hash) {
1023                 if (!validate_refname($hash)) {
1024                         die_error(400, "Invalid hash parameter");
1025                 }
1026         }
1027
1028         our $hash_parent = $input_params{'hash_parent'};
1029         if (defined $hash_parent) {
1030                 if (!validate_refname($hash_parent)) {
1031                         die_error(400, "Invalid hash parent parameter");
1032                 }
1033         }
1034
1035         our $hash_base = $input_params{'hash_base'};
1036         if (defined $hash_base) {
1037                 if (!validate_refname($hash_base)) {
1038                         die_error(400, "Invalid hash base parameter");
1039                 }
1040         }
1041
1042         our @extra_options = @{$input_params{'extra_options'}};
1043         # @extra_options is always defined, since it can only be (currently) set from
1044         # CGI, and $cgi->param() returns the empty array in array context if the param
1045         # is not set
1046         foreach my $opt (@extra_options) {
1047                 if (not exists $allowed_options{$opt}) {
1048                         die_error(400, "Invalid option parameter");
1049                 }
1050                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1051                         die_error(400, "Invalid option parameter for this action");
1052                 }
1053         }
1054
1055         our $hash_parent_base = $input_params{'hash_parent_base'};
1056         if (defined $hash_parent_base) {
1057                 if (!validate_refname($hash_parent_base)) {
1058                         die_error(400, "Invalid hash parent base parameter");
1059                 }
1060         }
1061
1062         # other parameters
1063         our $page = $input_params{'page'};
1064         if (defined $page) {
1065                 if ($page =~ m/[^0-9]/) {
1066                         die_error(400, "Invalid page parameter");
1067                 }
1068         }
1069
1070         our $searchtype = $input_params{'searchtype'};
1071         if (defined $searchtype) {
1072                 if ($searchtype =~ m/[^a-z]/) {
1073                         die_error(400, "Invalid searchtype parameter");
1074                 }
1075         }
1076
1077         our $search_use_regexp = $input_params{'search_use_regexp'};
1078
1079         our $searchtext = $input_params{'searchtext'};
1080         our $search_regexp;
1081         if (defined $searchtext) {
1082                 if (length($searchtext) < 2) {
1083                         die_error(403, "At least two characters are required for search parameter");
1084                 }
1085                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1086         }
1087 }
1088
1089 # path to the current git repository
1090 our $git_dir;
1091 sub evaluate_git_dir {
1092         our $git_dir = "$projectroot/$project" if $project;
1093 }
1094
1095 our (@snapshot_fmts, $git_avatar);
1096 sub configure_gitweb_features {
1097         # list of supported snapshot formats
1098         our @snapshot_fmts = gitweb_get_feature('snapshot');
1099         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1100
1101         # check that the avatar feature is set to a known provider name,
1102         # and for each provider check if the dependencies are satisfied.
1103         # if the provider name is invalid or the dependencies are not met,
1104         # reset $git_avatar to the empty string.
1105         our ($git_avatar) = gitweb_get_feature('avatar');
1106         if ($git_avatar eq 'gravatar') {
1107                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1108         } elsif ($git_avatar eq 'picon') {
1109                 # no dependencies
1110         } else {
1111                 $git_avatar = '';
1112         }
1113 }
1114
1115 # custom error handler: 'die <message>' is Internal Server Error
1116 sub handle_errors_html {
1117         my $msg = shift; # it is already HTML escaped
1118
1119         # to avoid infinite loop where error occurs in die_error,
1120         # change handler to default handler, disabling handle_errors_html
1121         set_message("Error occured when inside die_error:\n$msg");
1122
1123         # you cannot jump out of die_error when called as error handler;
1124         # the subroutine set via CGI::Carp::set_message is called _after_
1125         # HTTP headers are already written, so it cannot write them itself
1126         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1127 }
1128 set_message(\&handle_errors_html);
1129
1130 # dispatch
1131 sub dispatch {
1132         if (!defined $action) {
1133                 if (defined $hash) {
1134                         $action = git_get_type($hash);
1135                         $action or die_error(404, "Object does not exist");
1136                 } elsif (defined $hash_base && defined $file_name) {
1137                         $action = git_get_type("$hash_base:$file_name");
1138                         $action or die_error(404, "File or directory does not exist");
1139                 } elsif (defined $project) {
1140                         $action = 'summary';
1141                 } else {
1142                         $action = 'project_list';
1143                 }
1144         }
1145         if (!defined($actions{$action})) {
1146                 die_error(400, "Unknown action");
1147         }
1148         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1149             !$project) {
1150                 die_error(400, "Project needed");
1151         }
1152         $actions{$action}->();
1153 }
1154
1155 sub reset_timer {
1156         our $t0 = [ gettimeofday() ]
1157                 if defined $t0;
1158         our $number_of_git_cmds = 0;
1159 }
1160
1161 our $first_request = 1;
1162 sub run_request {
1163         reset_timer();
1164
1165         evaluate_uri();
1166         if ($first_request) {
1167                 evaluate_gitweb_config();
1168                 evaluate_git_version();
1169         }
1170         if ($per_request_config) {
1171                 if (ref($per_request_config) eq 'CODE') {
1172                         $per_request_config->();
1173                 } elsif (!$first_request) {
1174                         evaluate_gitweb_config();
1175                 }
1176         }
1177         check_loadavg();
1178
1179         # $projectroot and $projects_list might be set in gitweb config file
1180         $projects_list ||= $projectroot;
1181
1182         evaluate_query_params();
1183         evaluate_path_info();
1184         evaluate_and_validate_params();
1185         evaluate_git_dir();
1186
1187         configure_gitweb_features();
1188
1189         dispatch();
1190 }
1191
1192 our $is_last_request = sub { 1 };
1193 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1194 our $CGI = 'CGI';
1195 our $cgi;
1196 sub configure_as_fcgi {
1197         require CGI::Fast;
1198         our $CGI = 'CGI::Fast';
1199
1200         my $request_number = 0;
1201         # let each child service 100 requests
1202         our $is_last_request = sub { ++$request_number > 100 };
1203 }
1204 sub evaluate_argv {
1205         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1206         configure_as_fcgi()
1207                 if $script_name =~ /\.fcgi$/;
1208
1209         return unless (@ARGV);
1210
1211         require Getopt::Long;
1212         Getopt::Long::GetOptions(
1213                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1214                 'nproc|n=i' => sub {
1215                         my ($arg, $val) = @_;
1216                         return unless eval { require FCGI::ProcManager; 1; };
1217                         my $proc_manager = FCGI::ProcManager->new({
1218                                 n_processes => $val,
1219                         });
1220                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1221                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1222                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1223                 },
1224         );
1225 }
1226
1227 sub run {
1228         evaluate_argv();
1229
1230         $first_request = 1;
1231         $pre_listen_hook->()
1232                 if $pre_listen_hook;
1233
1234  REQUEST:
1235         while ($cgi = $CGI->new()) {
1236                 $pre_dispatch_hook->()
1237                         if $pre_dispatch_hook;
1238
1239                 run_request();
1240
1241                 $post_dispatch_hook->()
1242                         if $post_dispatch_hook;
1243                 $first_request = 0;
1244
1245                 last REQUEST if ($is_last_request->());
1246         }
1247
1248  DONE_GITWEB:
1249         1;
1250 }
1251
1252 run();
1253
1254 if (defined caller) {
1255         # wrapped in a subroutine processing requests,
1256         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1257         return;
1258 } else {
1259         # pure CGI script, serving single request
1260         exit;
1261 }
1262
1263 ## ======================================================================
1264 ## action links
1265
1266 # possible values of extra options
1267 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1268 # -replay => 1      - start from a current view (replay with modifications)
1269 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1270 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1271 sub href {
1272         my %params = @_;
1273         # default is to use -absolute url() i.e. $my_uri
1274         my $href = $params{-full} ? $my_url : $my_uri;
1275
1276         # implicit -replay, must be first of implicit params
1277         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1278
1279         $params{'project'} = $project unless exists $params{'project'};
1280
1281         if ($params{-replay}) {
1282                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1283                         if (!exists $params{$name}) {
1284                                 $params{$name} = $input_params{$name};
1285                         }
1286                 }
1287         }
1288
1289         my $use_pathinfo = gitweb_check_feature('pathinfo');
1290         if (defined $params{'project'} &&
1291             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1292                 # try to put as many parameters as possible in PATH_INFO:
1293                 #   - project name
1294                 #   - action
1295                 #   - hash_parent or hash_parent_base:/file_parent
1296                 #   - hash or hash_base:/filename
1297                 #   - the snapshot_format as an appropriate suffix
1298
1299                 # When the script is the root DirectoryIndex for the domain,
1300                 # $href here would be something like http://gitweb.example.com/
1301                 # Thus, we strip any trailing / from $href, to spare us double
1302                 # slashes in the final URL
1303                 $href =~ s,/$,,;
1304
1305                 # Then add the project name, if present
1306                 $href .= "/".esc_path_info($params{'project'});
1307                 delete $params{'project'};
1308
1309                 # since we destructively absorb parameters, we keep this
1310                 # boolean that remembers if we're handling a snapshot
1311                 my $is_snapshot = $params{'action'} eq 'snapshot';
1312
1313                 # Summary just uses the project path URL, any other action is
1314                 # added to the URL
1315                 if (defined $params{'action'}) {
1316                         $href .= "/".esc_path_info($params{'action'})
1317                                 unless $params{'action'} eq 'summary';
1318                         delete $params{'action'};
1319                 }
1320
1321                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1322                 # stripping nonexistent or useless pieces
1323                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1324                         || $params{'hash_parent'} || $params{'hash'});
1325                 if (defined $params{'hash_base'}) {
1326                         if (defined $params{'hash_parent_base'}) {
1327                                 $href .= esc_path_info($params{'hash_parent_base'});
1328                                 # skip the file_parent if it's the same as the file_name
1329                                 if (defined $params{'file_parent'}) {
1330                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1331                                                 delete $params{'file_parent'};
1332                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1333                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1334                                                 delete $params{'file_parent'};
1335                                         }
1336                                 }
1337                                 $href .= "..";
1338                                 delete $params{'hash_parent'};
1339                                 delete $params{'hash_parent_base'};
1340                         } elsif (defined $params{'hash_parent'}) {
1341                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1342                                 delete $params{'hash_parent'};
1343                         }
1344
1345                         $href .= esc_path_info($params{'hash_base'});
1346                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1347                                 $href .= ":/".esc_path_info($params{'file_name'});
1348                                 delete $params{'file_name'};
1349                         }
1350                         delete $params{'hash'};
1351                         delete $params{'hash_base'};
1352                 } elsif (defined $params{'hash'}) {
1353                         $href .= esc_path_info($params{'hash'});
1354                         delete $params{'hash'};
1355                 }
1356
1357                 # If the action was a snapshot, we can absorb the
1358                 # snapshot_format parameter too
1359                 if ($is_snapshot) {
1360                         my $fmt = $params{'snapshot_format'};
1361                         # snapshot_format should always be defined when href()
1362                         # is called, but just in case some code forgets, we
1363                         # fall back to the default
1364                         $fmt ||= $snapshot_fmts[0];
1365                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1366                         delete $params{'snapshot_format'};
1367                 }
1368         }
1369
1370         # now encode the parameters explicitly
1371         my @result = ();
1372         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1373                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1374                 if (defined $params{$name}) {
1375                         if (ref($params{$name}) eq "ARRAY") {
1376                                 foreach my $par (@{$params{$name}}) {
1377                                         push @result, $symbol . "=" . esc_param($par);
1378                                 }
1379                         } else {
1380                                 push @result, $symbol . "=" . esc_param($params{$name});
1381                         }
1382                 }
1383         }
1384         $href .= "?" . join(';', @result) if scalar @result;
1385
1386         # final transformation: trailing spaces must be escaped (URI-encoded)
1387         $href =~ s/(\s+)$/CGI::escape($1)/e;
1388
1389         if ($params{-anchor}) {
1390                 $href .= "#".esc_param($params{-anchor});
1391         }
1392
1393         return $href;
1394 }
1395
1396
1397 ## ======================================================================
1398 ## validation, quoting/unquoting and escaping
1399
1400 sub validate_action {
1401         my $input = shift || return undef;
1402         return undef unless exists $actions{$input};
1403         return $input;
1404 }
1405
1406 sub validate_project {
1407         my $input = shift || return undef;
1408         if (!validate_pathname($input) ||
1409                 !(-d "$projectroot/$input") ||
1410                 !check_export_ok("$projectroot/$input") ||
1411                 ($strict_export && !project_in_list($input))) {
1412                 return undef;
1413         } else {
1414                 return $input;
1415         }
1416 }
1417
1418 sub validate_pathname {
1419         my $input = shift || return undef;
1420
1421         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1422         # at the beginning, at the end, and between slashes.
1423         # also this catches doubled slashes
1424         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1425                 return undef;
1426         }
1427         # no null characters
1428         if ($input =~ m!\0!) {
1429                 return undef;
1430         }
1431         return $input;
1432 }
1433
1434 sub validate_refname {
1435         my $input = shift || return undef;
1436
1437         # textual hashes are O.K.
1438         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1439                 return $input;
1440         }
1441         # it must be correct pathname
1442         $input = validate_pathname($input)
1443                 or return undef;
1444         # restrictions on ref name according to git-check-ref-format
1445         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1446                 return undef;
1447         }
1448         return $input;
1449 }
1450
1451 # decode sequences of octets in utf8 into Perl's internal form,
1452 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1453 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1454 sub to_utf8 {
1455         my $str = shift;
1456         return undef unless defined $str;
1457
1458         if (utf8::is_utf8($str) || utf8::decode($str)) {
1459                 return $str;
1460         } else {
1461                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1462         }
1463 }
1464
1465 # quote unsafe chars, but keep the slash, even when it's not
1466 # correct, but quoted slashes look too horrible in bookmarks
1467 sub esc_param {
1468         my $str = shift;
1469         return undef unless defined $str;
1470         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1471         $str =~ s/ /\+/g;
1472         return $str;
1473 }
1474
1475 # the quoting rules for path_info fragment are slightly different
1476 sub esc_path_info {
1477         my $str = shift;
1478         return undef unless defined $str;
1479
1480         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1481         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1482
1483         return $str;
1484 }
1485
1486 # quote unsafe chars in whole URL, so some characters cannot be quoted
1487 sub esc_url {
1488         my $str = shift;
1489         return undef unless defined $str;
1490         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1491         $str =~ s/ /\+/g;
1492         return $str;
1493 }
1494
1495 # quote unsafe characters in HTML attributes
1496 sub esc_attr {
1497
1498         # for XHTML conformance escaping '"' to '&quot;' is not enough
1499         return esc_html(@_);
1500 }
1501
1502 # replace invalid utf8 character with SUBSTITUTION sequence
1503 sub esc_html {
1504         my $str = shift;
1505         my %opts = @_;
1506
1507         return undef unless defined $str;
1508
1509         $str = to_utf8($str);
1510         $str = $cgi->escapeHTML($str);
1511         if ($opts{'-nbsp'}) {
1512                 $str =~ s/ /&nbsp;/g;
1513         }
1514         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1515         return $str;
1516 }
1517
1518 # quote control characters and escape filename to HTML
1519 sub esc_path {
1520         my $str = shift;
1521         my %opts = @_;
1522
1523         return undef unless defined $str;
1524
1525         $str = to_utf8($str);
1526         $str = $cgi->escapeHTML($str);
1527         if ($opts{'-nbsp'}) {
1528                 $str =~ s/ /&nbsp;/g;
1529         }
1530         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1531         return $str;
1532 }
1533
1534 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1535 sub sanitize {
1536         my $str = shift;
1537
1538         return undef unless defined $str;
1539
1540         $str = to_utf8($str);
1541         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1542         return $str;
1543 }
1544
1545 # Make control characters "printable", using character escape codes (CEC)
1546 sub quot_cec {
1547         my $cntrl = shift;
1548         my %opts = @_;
1549         my %es = ( # character escape codes, aka escape sequences
1550                 "\t" => '\t',   # tab            (HT)
1551                 "\n" => '\n',   # line feed      (LF)
1552                 "\r" => '\r',   # carrige return (CR)
1553                 "\f" => '\f',   # form feed      (FF)
1554                 "\b" => '\b',   # backspace      (BS)
1555                 "\a" => '\a',   # alarm (bell)   (BEL)
1556                 "\e" => '\e',   # escape         (ESC)
1557                 "\013" => '\v', # vertical tab   (VT)
1558                 "\000" => '\0', # nul character  (NUL)
1559         );
1560         my $chr = ( (exists $es{$cntrl})
1561                     ? $es{$cntrl}
1562                     : sprintf('\%2x', ord($cntrl)) );
1563         if ($opts{-nohtml}) {
1564                 return $chr;
1565         } else {
1566                 return "<span class=\"cntrl\">$chr</span>";
1567         }
1568 }
1569
1570 # Alternatively use unicode control pictures codepoints,
1571 # Unicode "printable representation" (PR)
1572 sub quot_upr {
1573         my $cntrl = shift;
1574         my %opts = @_;
1575
1576         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1577         if ($opts{-nohtml}) {
1578                 return $chr;
1579         } else {
1580                 return "<span class=\"cntrl\">$chr</span>";
1581         }
1582 }
1583
1584 # git may return quoted and escaped filenames
1585 sub unquote {
1586         my $str = shift;
1587
1588         sub unq {
1589                 my $seq = shift;
1590                 my %es = ( # character escape codes, aka escape sequences
1591                         't' => "\t",   # tab            (HT, TAB)
1592                         'n' => "\n",   # newline        (NL)
1593                         'r' => "\r",   # return         (CR)
1594                         'f' => "\f",   # form feed      (FF)
1595                         'b' => "\b",   # backspace      (BS)
1596                         'a' => "\a",   # alarm (bell)   (BEL)
1597                         'e' => "\e",   # escape         (ESC)
1598                         'v' => "\013", # vertical tab   (VT)
1599                 );
1600
1601                 if ($seq =~ m/^[0-7]{1,3}$/) {
1602                         # octal char sequence
1603                         return chr(oct($seq));
1604                 } elsif (exists $es{$seq}) {
1605                         # C escape sequence, aka character escape code
1606                         return $es{$seq};
1607                 }
1608                 # quoted ordinary character
1609                 return $seq;
1610         }
1611
1612         if ($str =~ m/^"(.*)"$/) {
1613                 # needs unquoting
1614                 $str = $1;
1615                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1616         }
1617         return $str;
1618 }
1619
1620 # escape tabs (convert tabs to spaces)
1621 sub untabify {
1622         my $line = shift;
1623
1624         while ((my $pos = index($line, "\t")) != -1) {
1625                 if (my $count = (8 - ($pos % 8))) {
1626                         my $spaces = ' ' x $count;
1627                         $line =~ s/\t/$spaces/;
1628                 }
1629         }
1630
1631         return $line;
1632 }
1633
1634 sub project_in_list {
1635         my $project = shift;
1636         my @list = git_get_projects_list();
1637         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1638 }
1639
1640 ## ----------------------------------------------------------------------
1641 ## HTML aware string manipulation
1642
1643 # Try to chop given string on a word boundary between position
1644 # $len and $len+$add_len. If there is no word boundary there,
1645 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1646 # (marking chopped part) would be longer than given string.
1647 sub chop_str {
1648         my $str = shift;
1649         my $len = shift;
1650         my $add_len = shift || 10;
1651         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1652
1653         # Make sure perl knows it is utf8 encoded so we don't
1654         # cut in the middle of a utf8 multibyte char.
1655         $str = to_utf8($str);
1656
1657         # allow only $len chars, but don't cut a word if it would fit in $add_len
1658         # if it doesn't fit, cut it if it's still longer than the dots we would add
1659         # remove chopped character entities entirely
1660
1661         # when chopping in the middle, distribute $len into left and right part
1662         # return early if chopping wouldn't make string shorter
1663         if ($where eq 'center') {
1664                 return $str if ($len + 5 >= length($str)); # filler is length 5
1665                 $len = int($len/2);
1666         } else {
1667                 return $str if ($len + 4 >= length($str)); # filler is length 4
1668         }
1669
1670         # regexps: ending and beginning with word part up to $add_len
1671         my $endre = qr/.{$len}\w{0,$add_len}/;
1672         my $begre = qr/\w{0,$add_len}.{$len}/;
1673
1674         if ($where eq 'left') {
1675                 $str =~ m/^(.*?)($begre)$/;
1676                 my ($lead, $body) = ($1, $2);
1677                 if (length($lead) > 4) {
1678                         $lead = " ...";
1679                 }
1680                 return "$lead$body";
1681
1682         } elsif ($where eq 'center') {
1683                 $str =~ m/^($endre)(.*)$/;
1684                 my ($left, $str)  = ($1, $2);
1685                 $str =~ m/^(.*?)($begre)$/;
1686                 my ($mid, $right) = ($1, $2);
1687                 if (length($mid) > 5) {
1688                         $mid = " ... ";
1689                 }
1690                 return "$left$mid$right";
1691
1692         } else {
1693                 $str =~ m/^($endre)(.*)$/;
1694                 my $body = $1;
1695                 my $tail = $2;
1696                 if (length($tail) > 4) {
1697                         $tail = "... ";
1698                 }
1699                 return "$body$tail";
1700         }
1701 }
1702
1703 # takes the same arguments as chop_str, but also wraps a <span> around the
1704 # result with a title attribute if it does get chopped. Additionally, the
1705 # string is HTML-escaped.
1706 sub chop_and_escape_str {
1707         my ($str) = @_;
1708
1709         my $chopped = chop_str(@_);
1710         $str = to_utf8($str);
1711         if ($chopped eq $str) {
1712                 return esc_html($chopped);
1713         } else {
1714                 $str =~ s/[[:cntrl:]]/?/g;
1715                 return $cgi->span({-title=>$str}, esc_html($chopped));
1716         }
1717 }
1718
1719 ## ----------------------------------------------------------------------
1720 ## functions returning short strings
1721
1722 # CSS class for given age value (in seconds)
1723 sub age_class {
1724         my $age = shift;
1725
1726         if (!defined $age) {
1727                 return "noage";
1728         } elsif ($age < 60*60*2) {
1729                 return "age0";
1730         } elsif ($age < 60*60*24*2) {
1731                 return "age1";
1732         } else {
1733                 return "age2";
1734         }
1735 }
1736
1737 # convert age in seconds to "nn units ago" string
1738 sub age_string {
1739         my $age = shift;
1740         my $age_str;
1741
1742         if ($age > 60*60*24*365*2) {
1743                 $age_str = (int $age/60/60/24/365);
1744                 $age_str .= " years ago";
1745         } elsif ($age > 60*60*24*(365/12)*2) {
1746                 $age_str = int $age/60/60/24/(365/12);
1747                 $age_str .= " months ago";
1748         } elsif ($age > 60*60*24*7*2) {
1749                 $age_str = int $age/60/60/24/7;
1750                 $age_str .= " weeks ago";
1751         } elsif ($age > 60*60*24*2) {
1752                 $age_str = int $age/60/60/24;
1753                 $age_str .= " days ago";
1754         } elsif ($age > 60*60*2) {
1755                 $age_str = int $age/60/60;
1756                 $age_str .= " hours ago";
1757         } elsif ($age > 60*2) {
1758                 $age_str = int $age/60;
1759                 $age_str .= " min ago";
1760         } elsif ($age > 2) {
1761                 $age_str = int $age;
1762                 $age_str .= " sec ago";
1763         } else {
1764                 $age_str .= " right now";
1765         }
1766         return $age_str;
1767 }
1768
1769 use constant {
1770         S_IFINVALID => 0030000,
1771         S_IFGITLINK => 0160000,
1772 };
1773
1774 # submodule/subproject, a commit object reference
1775 sub S_ISGITLINK {
1776         my $mode = shift;
1777
1778         return (($mode & S_IFMT) == S_IFGITLINK)
1779 }
1780
1781 # convert file mode in octal to symbolic file mode string
1782 sub mode_str {
1783         my $mode = oct shift;
1784
1785         if (S_ISGITLINK($mode)) {
1786                 return 'm---------';
1787         } elsif (S_ISDIR($mode & S_IFMT)) {
1788                 return 'drwxr-xr-x';
1789         } elsif (S_ISLNK($mode)) {
1790                 return 'lrwxrwxrwx';
1791         } elsif (S_ISREG($mode)) {
1792                 # git cares only about the executable bit
1793                 if ($mode & S_IXUSR) {
1794                         return '-rwxr-xr-x';
1795                 } else {
1796                         return '-rw-r--r--';
1797                 };
1798         } else {
1799                 return '----------';
1800         }
1801 }
1802
1803 # convert file mode in octal to file type string
1804 sub file_type {
1805         my $mode = shift;
1806
1807         if ($mode !~ m/^[0-7]+$/) {
1808                 return $mode;
1809         } else {
1810                 $mode = oct $mode;
1811         }
1812
1813         if (S_ISGITLINK($mode)) {
1814                 return "submodule";
1815         } elsif (S_ISDIR($mode & S_IFMT)) {
1816                 return "directory";
1817         } elsif (S_ISLNK($mode)) {
1818                 return "symlink";
1819         } elsif (S_ISREG($mode)) {
1820                 return "file";
1821         } else {
1822                 return "unknown";
1823         }
1824 }
1825
1826 # convert file mode in octal to file type description string
1827 sub file_type_long {
1828         my $mode = shift;
1829
1830         if ($mode !~ m/^[0-7]+$/) {
1831                 return $mode;
1832         } else {
1833                 $mode = oct $mode;
1834         }
1835
1836         if (S_ISGITLINK($mode)) {
1837                 return "submodule";
1838         } elsif (S_ISDIR($mode & S_IFMT)) {
1839                 return "directory";
1840         } elsif (S_ISLNK($mode)) {
1841                 return "symlink";
1842         } elsif (S_ISREG($mode)) {
1843                 if ($mode & S_IXUSR) {
1844                         return "executable";
1845                 } else {
1846                         return "file";
1847                 };
1848         } else {
1849                 return "unknown";
1850         }
1851 }
1852
1853
1854 ## ----------------------------------------------------------------------
1855 ## functions returning short HTML fragments, or transforming HTML fragments
1856 ## which don't belong to other sections
1857
1858 # format line of commit message.
1859 sub format_log_line_html {
1860         my $line = shift;
1861
1862         $line = esc_html($line, -nbsp=>1);
1863         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1864                 $cgi->a({-href => href(action=>"object", hash=>$1),
1865                                         -class => "text"}, $1);
1866         }eg;
1867
1868         return $line;
1869 }
1870
1871 # format marker of refs pointing to given object
1872
1873 # the destination action is chosen based on object type and current context:
1874 # - for annotated tags, we choose the tag view unless it's the current view
1875 #   already, in which case we go to shortlog view
1876 # - for other refs, we keep the current view if we're in history, shortlog or
1877 #   log view, and select shortlog otherwise
1878 sub format_ref_marker {
1879         my ($refs, $id) = @_;
1880         my $markers = '';
1881
1882         if (defined $refs->{$id}) {
1883                 foreach my $ref (@{$refs->{$id}}) {
1884                         # this code exploits the fact that non-lightweight tags are the
1885                         # only indirect objects, and that they are the only objects for which
1886                         # we want to use tag instead of shortlog as action
1887                         my ($type, $name) = qw();
1888                         my $indirect = ($ref =~ s/\^\{\}$//);
1889                         # e.g. tags/v2.6.11 or heads/next
1890                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1891                                 $type = $1;
1892                                 $name = $2;
1893                         } else {
1894                                 $type = "ref";
1895                                 $name = $ref;
1896                         }
1897
1898                         my $class = $type;
1899                         $class .= " indirect" if $indirect;
1900
1901                         my $dest_action = "shortlog";
1902
1903                         if ($indirect) {
1904                                 $dest_action = "tag" unless $action eq "tag";
1905                         } elsif ($action =~ /^(history|(short)?log)$/) {
1906                                 $dest_action = $action;
1907                         }
1908
1909                         my $dest = "";
1910                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1911                         $dest .= $ref;
1912
1913                         my $link = $cgi->a({
1914                                 -href => href(
1915                                         action=>$dest_action,
1916                                         hash=>$dest
1917                                 )}, $name);
1918
1919                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1920                                 $link . "</span>";
1921                 }
1922         }
1923
1924         if ($markers) {
1925                 return ' <span class="refs">'. $markers . '</span>';
1926         } else {
1927                 return "";
1928         }
1929 }
1930
1931 # format, perhaps shortened and with markers, title line
1932 sub format_subject_html {
1933         my ($long, $short, $href, $extra) = @_;
1934         $extra = '' unless defined($extra);
1935
1936         if (length($short) < length($long)) {
1937                 $long =~ s/[[:cntrl:]]/?/g;
1938                 return $cgi->a({-href => $href, -class => "list subject",
1939                                 -title => to_utf8($long)},
1940                        esc_html($short)) . $extra;
1941         } else {
1942                 return $cgi->a({-href => $href, -class => "list subject"},
1943                        esc_html($long)) . $extra;
1944         }
1945 }
1946
1947 # Rather than recomputing the url for an email multiple times, we cache it
1948 # after the first hit. This gives a visible benefit in views where the avatar
1949 # for the same email is used repeatedly (e.g. shortlog).
1950 # The cache is shared by all avatar engines (currently gravatar only), which
1951 # are free to use it as preferred. Since only one avatar engine is used for any
1952 # given page, there's no risk for cache conflicts.
1953 our %avatar_cache = ();
1954
1955 # Compute the picon url for a given email, by using the picon search service over at
1956 # http://www.cs.indiana.edu/picons/search.html
1957 sub picon_url {
1958         my $email = lc shift;
1959         if (!$avatar_cache{$email}) {
1960                 my ($user, $domain) = split('@', $email);
1961                 $avatar_cache{$email} =
1962                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1963                         "$domain/$user/" .
1964                         "users+domains+unknown/up/single";
1965         }
1966         return $avatar_cache{$email};
1967 }
1968
1969 # Compute the gravatar url for a given email, if it's not in the cache already.
1970 # Gravatar stores only the part of the URL before the size, since that's the
1971 # one computationally more expensive. This also allows reuse of the cache for
1972 # different sizes (for this particular engine).
1973 sub gravatar_url {
1974         my $email = lc shift;
1975         my $size = shift;
1976         $avatar_cache{$email} ||=
1977                 "http://www.gravatar.com/avatar/" .
1978                         Digest::MD5::md5_hex($email) . "?s=";
1979         return $avatar_cache{$email} . $size;
1980 }
1981
1982 # Insert an avatar for the given $email at the given $size if the feature
1983 # is enabled.
1984 sub git_get_avatar {
1985         my ($email, %opts) = @_;
1986         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1987         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1988         $opts{-size} ||= 'default';
1989         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1990         my $url = "";
1991         if ($git_avatar eq 'gravatar') {
1992                 $url = gravatar_url($email, $size);
1993         } elsif ($git_avatar eq 'picon') {
1994                 $url = picon_url($email);
1995         }
1996         # Other providers can be added by extending the if chain, defining $url
1997         # as needed. If no variant puts something in $url, we assume avatars
1998         # are completely disabled/unavailable.
1999         if ($url) {
2000                 return $pre_white .
2001                        "<img width=\"$size\" " .
2002                             "class=\"avatar\" " .
2003                             "src=\"".esc_url($url)."\" " .
2004                             "alt=\"\" " .
2005                        "/>" . $post_white;
2006         } else {
2007                 return "";
2008         }
2009 }
2010
2011 sub format_search_author {
2012         my ($author, $searchtype, $displaytext) = @_;
2013         my $have_search = gitweb_check_feature('search');
2014
2015         if ($have_search) {
2016                 my $performed = "";
2017                 if ($searchtype eq 'author') {
2018                         $performed = "authored";
2019                 } elsif ($searchtype eq 'committer') {
2020                         $performed = "committed";
2021                 }
2022
2023                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2024                                 searchtext=>$author,
2025                                 searchtype=>$searchtype), class=>"list",
2026                                 title=>"Search for commits $performed by $author"},
2027                                 $displaytext);
2028
2029         } else {
2030                 return $displaytext;
2031         }
2032 }
2033
2034 # format the author name of the given commit with the given tag
2035 # the author name is chopped and escaped according to the other
2036 # optional parameters (see chop_str).
2037 sub format_author_html {
2038         my $tag = shift;
2039         my $co = shift;
2040         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2041         return "<$tag class=\"author\">" .
2042                format_search_author($co->{'author_name'}, "author",
2043                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2044                        $author) .
2045                "</$tag>";
2046 }
2047
2048 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2049 sub format_git_diff_header_line {
2050         my $line = shift;
2051         my $diffinfo = shift;
2052         my ($from, $to) = @_;
2053
2054         if ($diffinfo->{'nparents'}) {
2055                 # combined diff
2056                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2057                 if ($to->{'href'}) {
2058                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2059                                          esc_path($to->{'file'}));
2060                 } else { # file was deleted (no href)
2061                         $line .= esc_path($to->{'file'});
2062                 }
2063         } else {
2064                 # "ordinary" diff
2065                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2066                 if ($from->{'href'}) {
2067                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2068                                          'a/' . esc_path($from->{'file'}));
2069                 } else { # file was added (no href)
2070                         $line .= 'a/' . esc_path($from->{'file'});
2071                 }
2072                 $line .= ' ';
2073                 if ($to->{'href'}) {
2074                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2075                                          'b/' . esc_path($to->{'file'}));
2076                 } else { # file was deleted
2077                         $line .= 'b/' . esc_path($to->{'file'});
2078                 }
2079         }
2080
2081         return "<div class=\"diff header\">$line</div>\n";
2082 }
2083
2084 # format extended diff header line, before patch itself
2085 sub format_extended_diff_header_line {
2086         my $line = shift;
2087         my $diffinfo = shift;
2088         my ($from, $to) = @_;
2089
2090         # match <path>
2091         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2092                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2093                                        esc_path($from->{'file'}));
2094         }
2095         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2096                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2097                                  esc_path($to->{'file'}));
2098         }
2099         # match single <mode>
2100         if ($line =~ m/\s(\d{6})$/) {
2101                 $line .= '<span class="info"> (' .
2102                          file_type_long($1) .
2103                          ')</span>';
2104         }
2105         # match <hash>
2106         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2107                 # can match only for combined diff
2108                 $line = 'index ';
2109                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2110                         if ($from->{'href'}[$i]) {
2111                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2112                                                   -class=>"hash"},
2113                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2114                         } else {
2115                                 $line .= '0' x 7;
2116                         }
2117                         # separator
2118                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2119                 }
2120                 $line .= '..';
2121                 if ($to->{'href'}) {
2122                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2123                                          substr($diffinfo->{'to_id'},0,7));
2124                 } else {
2125                         $line .= '0' x 7;
2126                 }
2127
2128         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2129                 # can match only for ordinary diff
2130                 my ($from_link, $to_link);
2131                 if ($from->{'href'}) {
2132                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2133                                              substr($diffinfo->{'from_id'},0,7));
2134                 } else {
2135                         $from_link = '0' x 7;
2136                 }
2137                 if ($to->{'href'}) {
2138                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2139                                            substr($diffinfo->{'to_id'},0,7));
2140                 } else {
2141                         $to_link = '0' x 7;
2142                 }
2143                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2144                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2145         }
2146
2147         return $line . "<br/>\n";
2148 }
2149
2150 # format from-file/to-file diff header
2151 sub format_diff_from_to_header {
2152         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2153         my $line;
2154         my $result = '';
2155
2156         $line = $from_line;
2157         #assert($line =~ m/^---/) if DEBUG;
2158         # no extra formatting for "^--- /dev/null"
2159         if (! $diffinfo->{'nparents'}) {
2160                 # ordinary (single parent) diff
2161                 if ($line =~ m!^--- "?a/!) {
2162                         if ($from->{'href'}) {
2163                                 $line = '--- a/' .
2164                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2165                                                 esc_path($from->{'file'}));
2166                         } else {
2167                                 $line = '--- a/' .
2168                                         esc_path($from->{'file'});
2169                         }
2170                 }
2171                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2172
2173         } else {
2174                 # combined diff (merge commit)
2175                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2176                         if ($from->{'href'}[$i]) {
2177                                 $line = '--- ' .
2178                                         $cgi->a({-href=>href(action=>"blobdiff",
2179                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2180                                                              hash_parent_base=>$parents[$i],
2181                                                              file_parent=>$from->{'file'}[$i],
2182                                                              hash=>$diffinfo->{'to_id'},
2183                                                              hash_base=>$hash,
2184                                                              file_name=>$to->{'file'}),
2185                                                  -class=>"path",
2186                                                  -title=>"diff" . ($i+1)},
2187                                                 $i+1) .
2188                                         '/' .
2189                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2190                                                 esc_path($from->{'file'}[$i]));
2191                         } else {
2192                                 $line = '--- /dev/null';
2193                         }
2194                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2195                 }
2196         }
2197
2198         $line = $to_line;
2199         #assert($line =~ m/^\+\+\+/) if DEBUG;
2200         # no extra formatting for "^+++ /dev/null"
2201         if ($line =~ m!^\+\+\+ "?b/!) {
2202                 if ($to->{'href'}) {
2203                         $line = '+++ b/' .
2204                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2205                                         esc_path($to->{'file'}));
2206                 } else {
2207                         $line = '+++ b/' .
2208                                 esc_path($to->{'file'});
2209                 }
2210         }
2211         $result .= qq!<div class="diff to_file">$line</div>\n!;
2212
2213         return $result;
2214 }
2215
2216 # create note for patch simplified by combined diff
2217 sub format_diff_cc_simplified {
2218         my ($diffinfo, @parents) = @_;
2219         my $result = '';
2220
2221         $result .= "<div class=\"diff header\">" .
2222                    "diff --cc ";
2223         if (!is_deleted($diffinfo)) {
2224                 $result .= $cgi->a({-href => href(action=>"blob",
2225                                                   hash_base=>$hash,
2226                                                   hash=>$diffinfo->{'to_id'},
2227                                                   file_name=>$diffinfo->{'to_file'}),
2228                                     -class => "path"},
2229                                    esc_path($diffinfo->{'to_file'}));
2230         } else {
2231                 $result .= esc_path($diffinfo->{'to_file'});
2232         }
2233         $result .= "</div>\n" . # class="diff header"
2234                    "<div class=\"diff nodifferences\">" .
2235                    "Simple merge" .
2236                    "</div>\n"; # class="diff nodifferences"
2237
2238         return $result;
2239 }
2240
2241 sub diff_line_class {
2242         my ($line, $from, $to) = @_;
2243
2244         # ordinary diff
2245         my $num_sign = 1;
2246         # combined diff
2247         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2248                 $num_sign = scalar @{$from->{'href'}};
2249         }
2250
2251         my @diff_line_classifier = (
2252                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2253                 { regexp => qr/^\\/,               class => "incomplete"  },
2254                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2255                 # classifier for context must come before classifier add/rem,
2256                 # or we would have to use more complicated regexp, for example
2257                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2258                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2259                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2260         );
2261         for my $clsfy (@diff_line_classifier) {
2262                 return $clsfy->{'class'}
2263                         if ($line =~ $clsfy->{'regexp'});
2264         }
2265
2266         # fallback
2267         return "";
2268 }
2269
2270 # assumes that $from and $to are defined and correctly filled,
2271 # and that $line holds a line of chunk header for unified diff
2272 sub format_unidiff_chunk_header {
2273         my ($line, $from, $to) = @_;
2274
2275         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2276                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2277
2278         $from_lines = 0 unless defined $from_lines;
2279         $to_lines   = 0 unless defined $to_lines;
2280
2281         if ($from->{'href'}) {
2282                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2283                                      -class=>"list"}, $from_text);
2284         }
2285         if ($to->{'href'}) {
2286                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2287                                      -class=>"list"}, $to_text);
2288         }
2289         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2290                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2291         return $line;
2292 }
2293
2294 # assumes that $from and $to are defined and correctly filled,
2295 # and that $line holds a line of chunk header for combined diff
2296 sub format_cc_diff_chunk_header {
2297         my ($line, $from, $to) = @_;
2298
2299         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2300         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2301
2302         @from_text = split(' ', $ranges);
2303         for (my $i = 0; $i < @from_text; ++$i) {
2304                 ($from_start[$i], $from_nlines[$i]) =
2305                         (split(',', substr($from_text[$i], 1)), 0);
2306         }
2307
2308         $to_text   = pop @from_text;
2309         $to_start  = pop @from_start;
2310         $to_nlines = pop @from_nlines;
2311
2312         $line = "<span class=\"chunk_info\">$prefix ";
2313         for (my $i = 0; $i < @from_text; ++$i) {
2314                 if ($from->{'href'}[$i]) {
2315                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2316                                           -class=>"list"}, $from_text[$i]);
2317                 } else {
2318                         $line .= $from_text[$i];
2319                 }
2320                 $line .= " ";
2321         }
2322         if ($to->{'href'}) {
2323                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2324                                   -class=>"list"}, $to_text);
2325         } else {
2326                 $line .= $to_text;
2327         }
2328         $line .= " $prefix</span>" .
2329                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2330         return $line;
2331 }
2332
2333 # process patch (diff) line (not to be used for diff headers),
2334 # returning class and HTML-formatted (but not wrapped) line
2335 sub process_diff_line {
2336         my $line = shift;
2337         my ($from, $to) = @_;
2338
2339         my $diff_class = diff_line_class($line, $from, $to);
2340
2341         chomp $line;
2342         $line = untabify($line);
2343
2344         if ($from && $to && $line =~ m/^\@{2} /) {
2345                 $line = format_unidiff_chunk_header($line, $from, $to);
2346                 return $diff_class, $line;
2347
2348         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2349                 $line = format_cc_diff_chunk_header($line, $from, $to);
2350                 return $diff_class, $line;
2351
2352         }
2353         return $diff_class, esc_html($line, -nbsp=>1);
2354 }
2355
2356 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2357 # linked.  Pass the hash of the tree/commit to snapshot.
2358 sub format_snapshot_links {
2359         my ($hash) = @_;
2360         my $num_fmts = @snapshot_fmts;
2361         if ($num_fmts > 1) {
2362                 # A parenthesized list of links bearing format names.
2363                 # e.g. "snapshot (_tar.gz_ _zip_)"
2364                 return "snapshot (" . join(' ', map
2365                         $cgi->a({
2366                                 -href => href(
2367                                         action=>"snapshot",
2368                                         hash=>$hash,
2369                                         snapshot_format=>$_
2370                                 )
2371                         }, $known_snapshot_formats{$_}{'display'})
2372                 , @snapshot_fmts) . ")";
2373         } elsif ($num_fmts == 1) {
2374                 # A single "snapshot" link whose tooltip bears the format name.
2375                 # i.e. "_snapshot_"
2376                 my ($fmt) = @snapshot_fmts;
2377                 return
2378                         $cgi->a({
2379                                 -href => href(
2380                                         action=>"snapshot",
2381                                         hash=>$hash,
2382                                         snapshot_format=>$fmt
2383                                 ),
2384                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2385                         }, "snapshot");
2386         } else { # $num_fmts == 0
2387                 return undef;
2388         }
2389 }
2390
2391 ## ......................................................................
2392 ## functions returning values to be passed, perhaps after some
2393 ## transformation, to other functions; e.g. returning arguments to href()
2394
2395 # returns hash to be passed to href to generate gitweb URL
2396 # in -title key it returns description of link
2397 sub get_feed_info {
2398         my $format = shift || 'Atom';
2399         my %res = (action => lc($format));
2400
2401         # feed links are possible only for project views
2402         return unless (defined $project);
2403         # some views should link to OPML, or to generic project feed,
2404         # or don't have specific feed yet (so they should use generic)
2405         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2406
2407         my $branch;
2408         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2409         # from tag links; this also makes possible to detect branch links
2410         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2411             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2412                 $branch = $1;
2413         }
2414         # find log type for feed description (title)
2415         my $type = 'log';
2416         if (defined $file_name) {
2417                 $type  = "history of $file_name";
2418                 $type .= "/" if ($action eq 'tree');
2419                 $type .= " on '$branch'" if (defined $branch);
2420         } else {
2421                 $type = "log of $branch" if (defined $branch);
2422         }
2423
2424         $res{-title} = $type;
2425         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2426         $res{'file_name'} = $file_name;
2427
2428         return %res;
2429 }
2430
2431 ## ----------------------------------------------------------------------
2432 ## git utility subroutines, invoking git commands
2433
2434 # returns path to the core git executable and the --git-dir parameter as list
2435 sub git_cmd {
2436         $number_of_git_cmds++;
2437         return $GIT, '--git-dir='.$git_dir;
2438 }
2439
2440 # quote the given arguments for passing them to the shell
2441 # quote_command("command", "arg 1", "arg with ' and ! characters")
2442 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2443 # Try to avoid using this function wherever possible.
2444 sub quote_command {
2445         return join(' ',
2446                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2447 }
2448
2449 # get HEAD ref of given project as hash
2450 sub git_get_head_hash {
2451         return git_get_full_hash(shift, 'HEAD');
2452 }
2453
2454 sub git_get_full_hash {
2455         return git_get_hash(@_);
2456 }
2457
2458 sub git_get_short_hash {
2459         return git_get_hash(@_, '--short=7');
2460 }
2461
2462 sub git_get_hash {
2463         my ($project, $hash, @options) = @_;
2464         my $o_git_dir = $git_dir;
2465         my $retval = undef;
2466         $git_dir = "$projectroot/$project";
2467         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2468             '--verify', '-q', @options, $hash) {
2469                 $retval = <$fd>;
2470                 chomp $retval if defined $retval;
2471                 close $fd;
2472         }
2473         if (defined $o_git_dir) {
2474                 $git_dir = $o_git_dir;
2475         }
2476         return $retval;
2477 }
2478
2479 # get type of given object
2480 sub git_get_type {
2481         my $hash = shift;
2482
2483         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2484         my $type = <$fd>;
2485         close $fd or return;
2486         chomp $type;
2487         return $type;
2488 }
2489
2490 # repository configuration
2491 our $config_file = '';
2492 our %config;
2493
2494 # store multiple values for single key as anonymous array reference
2495 # single values stored directly in the hash, not as [ <value> ]
2496 sub hash_set_multi {
2497         my ($hash, $key, $value) = @_;
2498
2499         if (!exists $hash->{$key}) {
2500                 $hash->{$key} = $value;
2501         } elsif (!ref $hash->{$key}) {
2502                 $hash->{$key} = [ $hash->{$key}, $value ];
2503         } else {
2504                 push @{$hash->{$key}}, $value;
2505         }
2506 }
2507
2508 # return hash of git project configuration
2509 # optionally limited to some section, e.g. 'gitweb'
2510 sub git_parse_project_config {
2511         my $section_regexp = shift;
2512         my %config;
2513
2514         local $/ = "\0";
2515
2516         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2517                 or return;
2518
2519         while (my $keyval = <$fh>) {
2520                 chomp $keyval;
2521                 my ($key, $value) = split(/\n/, $keyval, 2);
2522
2523                 hash_set_multi(\%config, $key, $value)
2524                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2525         }
2526         close $fh;
2527
2528         return %config;
2529 }
2530
2531 # convert config value to boolean: 'true' or 'false'
2532 # no value, number > 0, 'true' and 'yes' values are true
2533 # rest of values are treated as false (never as error)
2534 sub config_to_bool {
2535         my $val = shift;
2536
2537         return 1 if !defined $val;             # section.key
2538
2539         # strip leading and trailing whitespace
2540         $val =~ s/^\s+//;
2541         $val =~ s/\s+$//;
2542
2543         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2544                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2545 }
2546
2547 # convert config value to simple decimal number
2548 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2549 # to be multiplied by 1024, 1048576, or 1073741824
2550 sub config_to_int {
2551         my $val = shift;
2552
2553         # strip leading and trailing whitespace
2554         $val =~ s/^\s+//;
2555         $val =~ s/\s+$//;
2556
2557         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2558                 $unit = lc($unit);
2559                 # unknown unit is treated as 1
2560                 return $num * ($unit eq 'g' ? 1073741824 :
2561                                $unit eq 'm' ?    1048576 :
2562                                $unit eq 'k' ?       1024 : 1);
2563         }
2564         return $val;
2565 }
2566
2567 # convert config value to array reference, if needed
2568 sub config_to_multi {
2569         my $val = shift;
2570
2571         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2572 }
2573
2574 sub git_get_project_config {
2575         my ($key, $type) = @_;
2576
2577         return unless defined $git_dir;
2578
2579         # key sanity check
2580         return unless ($key);
2581         # only subsection, if exists, is case sensitive,
2582         # and not lowercased by 'git config -z -l'
2583         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2584                 $key = join(".", lc($hi), $mi, lc($lo));
2585         } else {
2586                 $key = lc($key);
2587         }
2588         $key =~ s/^gitweb\.//;
2589         return if ($key =~ m/\W/);
2590
2591         # type sanity check
2592         if (defined $type) {
2593                 $type =~ s/^--//;
2594                 $type = undef
2595                         unless ($type eq 'bool' || $type eq 'int');
2596         }
2597
2598         # get config
2599         if (!defined $config_file ||
2600             $config_file ne "$git_dir/config") {
2601                 %config = git_parse_project_config('gitweb');
2602                 $config_file = "$git_dir/config";
2603         }
2604
2605         # check if config variable (key) exists
2606         return unless exists $config{"gitweb.$key"};
2607
2608         # ensure given type
2609         if (!defined $type) {
2610                 return $config{"gitweb.$key"};
2611         } elsif ($type eq 'bool') {
2612                 # backward compatibility: 'git config --bool' returns true/false
2613                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2614         } elsif ($type eq 'int') {
2615                 return config_to_int($config{"gitweb.$key"});
2616         }
2617         return $config{"gitweb.$key"};
2618 }
2619
2620 # get hash of given path at given ref
2621 sub git_get_hash_by_path {
2622         my $base = shift;
2623         my $path = shift || return undef;
2624         my $type = shift;
2625
2626         $path =~ s,/+$,,;
2627
2628         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2629                 or die_error(500, "Open git-ls-tree failed");
2630         my $line = <$fd>;
2631         close $fd or return undef;
2632
2633         if (!defined $line) {
2634                 # there is no tree or hash given by $path at $base
2635                 return undef;
2636         }
2637
2638         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2639         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2640         if (defined $type && $type ne $2) {
2641                 # type doesn't match
2642                 return undef;
2643         }
2644         return $3;
2645 }
2646
2647 # get path of entry with given hash at given tree-ish (ref)
2648 # used to get 'from' filename for combined diff (merge commit) for renames
2649 sub git_get_path_by_hash {
2650         my $base = shift || return;
2651         my $hash = shift || return;
2652
2653         local $/ = "\0";
2654
2655         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2656                 or return undef;
2657         while (my $line = <$fd>) {
2658                 chomp $line;
2659
2660                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2661                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2662                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2663                         close $fd;
2664                         return $1;
2665                 }
2666         }
2667         close $fd;
2668         return undef;
2669 }
2670
2671 ## ......................................................................
2672 ## git utility functions, directly accessing git repository
2673
2674 # get the value of config variable either from file named as the variable
2675 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2676 # configuration variable in the repository config file.
2677 sub git_get_file_or_project_config {
2678         my ($path, $name) = @_;
2679
2680         $git_dir = "$projectroot/$path";
2681         open my $fd, '<', "$git_dir/$name"
2682                 or return git_get_project_config($name);
2683         my $conf = <$fd>;
2684         close $fd;
2685         if (defined $conf) {
2686                 chomp $conf;
2687         }
2688         return $conf;
2689 }
2690
2691 sub git_get_project_description {
2692         my $path = shift;
2693         return git_get_file_or_project_config($path, 'description');
2694 }
2695
2696 sub git_get_project_category {
2697         my $path = shift;
2698         return git_get_file_or_project_config($path, 'category');
2699 }
2700
2701
2702 # supported formats:
2703 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2704 #   - if its contents is a number, use it as tag weight,
2705 #   - otherwise add a tag with weight 1
2706 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2707 #   the same value multiple times increases tag weight
2708 # * `gitweb.ctag' multi-valued repo config variable
2709 sub git_get_project_ctags {
2710         my $project = shift;
2711         my $ctags = {};
2712
2713         $git_dir = "$projectroot/$project";
2714         if (opendir my $dh, "$git_dir/ctags") {
2715                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2716                 foreach my $tagfile (@files) {
2717                         open my $ct, '<', $tagfile
2718                                 or next;
2719                         my $val = <$ct>;
2720                         chomp $val if $val;
2721                         close $ct;
2722
2723                         (my $ctag = $tagfile) =~ s#.*/##;
2724                         if ($val =~ /^\d+$/) {
2725                                 $ctags->{$ctag} = $val;
2726                         } else {
2727                                 $ctags->{$ctag} = 1;
2728                         }
2729                 }
2730                 closedir $dh;
2731
2732         } elsif (open my $fh, '<', "$git_dir/ctags") {
2733                 while (my $line = <$fh>) {
2734                         chomp $line;
2735                         $ctags->{$line}++ if $line;
2736                 }
2737                 close $fh;
2738
2739         } else {
2740                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2741                 foreach my $tag (@$taglist) {
2742                         $ctags->{$tag}++;
2743                 }
2744         }
2745
2746         return $ctags;
2747 }
2748
2749 # return hash, where keys are content tags ('ctags'),
2750 # and values are sum of weights of given tag in every project
2751 sub git_gather_all_ctags {
2752         my $projects = shift;
2753         my $ctags = {};
2754
2755         foreach my $p (@$projects) {
2756                 foreach my $ct (keys %{$p->{'ctags'}}) {
2757                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2758                 }
2759         }
2760
2761         return $ctags;
2762 }
2763
2764 sub git_populate_project_tagcloud {
2765         my $ctags = shift;
2766
2767         # First, merge different-cased tags; tags vote on casing
2768         my %ctags_lc;
2769         foreach (keys %$ctags) {
2770                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2771                 if (not $ctags_lc{lc $_}->{topcount}
2772                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2773                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2774                         $ctags_lc{lc $_}->{topname} = $_;
2775                 }
2776         }
2777
2778         my $cloud;
2779         my $matched = $input_params{'ctag'};
2780         if (eval { require HTML::TagCloud; 1; }) {
2781                 $cloud = HTML::TagCloud->new;
2782                 foreach my $ctag (sort keys %ctags_lc) {
2783                         # Pad the title with spaces so that the cloud looks
2784                         # less crammed.
2785                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2786                         $title =~ s/ /&nbsp;/g;
2787                         $title =~ s/^/&nbsp;/g;
2788                         $title =~ s/$/&nbsp;/g;
2789                         if (defined $matched && $matched eq $ctag) {
2790                                 $title = qq(<span class="match">$title</span>);
2791                         }
2792                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2793                                     $ctags_lc{$ctag}->{count});
2794                 }
2795         } else {
2796                 $cloud = {};
2797                 foreach my $ctag (keys %ctags_lc) {
2798                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2799                         if (defined $matched && $matched eq $ctag) {
2800                                 $title = qq(<span class="match">$title</span>);
2801                         }
2802                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2803                         $cloud->{$ctag}{ctag} =
2804                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2805                 }
2806         }
2807         return $cloud;
2808 }
2809
2810 sub git_show_project_tagcloud {
2811         my ($cloud, $count) = @_;
2812         if (ref $cloud eq 'HTML::TagCloud') {
2813                 return $cloud->html_and_css($count);
2814         } else {
2815                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2816                 return
2817                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2818                         join (', ', map {
2819                                 $cloud->{$_}->{'ctag'}
2820                         } splice(@tags, 0, $count)) .
2821                         '</div>';
2822         }
2823 }
2824
2825 sub git_get_project_url_list {
2826         my $path = shift;
2827
2828         $git_dir = "$projectroot/$path";
2829         open my $fd, '<', "$git_dir/cloneurl"
2830                 or return wantarray ?
2831                 @{ config_to_multi(git_get_project_config('url')) } :
2832                    config_to_multi(git_get_project_config('url'));
2833         my @git_project_url_list = map { chomp; $_ } <$fd>;
2834         close $fd;
2835
2836         return wantarray ? @git_project_url_list : \@git_project_url_list;
2837 }
2838
2839 sub git_get_projects_list {
2840         my $filter = shift || '';
2841         my $paranoid = shift;
2842         my @list;
2843
2844         if (-d $projects_list) {
2845                 # search in directory
2846                 my $dir = $projects_list;
2847                 # remove the trailing "/"
2848                 $dir =~ s!/+$!!;
2849                 my $pfxlen = length("$dir");
2850                 my $pfxdepth = ($dir =~ tr!/!!);
2851                 # when filtering, search only given subdirectory
2852                 if ($filter && !$paranoid) {
2853                         $dir .= "/$filter";
2854                         $dir =~ s!/+$!!;
2855                 }
2856
2857                 File::Find::find({
2858                         follow_fast => 1, # follow symbolic links
2859                         follow_skip => 2, # ignore duplicates
2860                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2861                         wanted => sub {
2862                                 # global variables
2863                                 our $project_maxdepth;
2864                                 our $projectroot;
2865                                 # skip project-list toplevel, if we get it.
2866                                 return if (m!^[/.]$!);
2867                                 # only directories can be git repositories
2868                                 return unless (-d $_);
2869                                 # don't traverse too deep (Find is super slow on os x)
2870                                 # $project_maxdepth excludes depth of $projectroot
2871                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2872                                         $File::Find::prune = 1;
2873                                         return;
2874                                 }
2875
2876                                 my $path = substr($File::Find::name, $pfxlen + 1);
2877                                 # paranoidly only filter here
2878                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2879                                         next;
2880                                 }
2881                                 # we check related file in $projectroot
2882                                 if (check_export_ok("$projectroot/$path")) {
2883                                         push @list, { path => $path };
2884                                         $File::Find::prune = 1;
2885                                 }
2886                         },
2887                 }, "$dir");
2888
2889         } elsif (-f $projects_list) {
2890                 # read from file(url-encoded):
2891                 # 'git%2Fgit.git Linus+Torvalds'
2892                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2893                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2894                 open my $fd, '<', $projects_list or return;
2895         PROJECT:
2896                 while (my $line = <$fd>) {
2897                         chomp $line;
2898                         my ($path, $owner) = split ' ', $line;
2899                         $path = unescape($path);
2900                         $owner = unescape($owner);
2901                         if (!defined $path) {
2902                                 next;
2903                         }
2904                         # if $filter is rpovided, check if $path begins with $filter
2905                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2906                                 next;
2907                         }
2908                         if (check_export_ok("$projectroot/$path")) {
2909                                 my $pr = {
2910                                         path => $path,
2911                                         owner => to_utf8($owner),
2912                                 };
2913                                 push @list, $pr;
2914                         }
2915                 }
2916                 close $fd;
2917         }
2918         return @list;
2919 }
2920
2921 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2922 # as side effects it sets 'forks' field to list of forks for forked projects
2923 sub filter_forks_from_projects_list {
2924         my $projects = shift;
2925
2926         my %trie; # prefix tree of directories (path components)
2927         # generate trie out of those directories that might contain forks
2928         foreach my $pr (@$projects) {
2929                 my $path = $pr->{'path'};
2930                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2931                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2932                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2933                 next unless (-d "$projectroot/$path"); # containing directory exists
2934                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2935
2936                 # add to trie
2937                 my @dirs = split('/', $path);
2938                 # walk the trie, until either runs out of components or out of trie
2939                 my $ref = \%trie;
2940                 while (scalar @dirs &&
2941                        exists($ref->{$dirs[0]})) {
2942                         $ref = $ref->{shift @dirs};
2943                 }
2944                 # create rest of trie structure from rest of components
2945                 foreach my $dir (@dirs) {
2946                         $ref = $ref->{$dir} = {};
2947                 }
2948                 # create end marker, store $pr as a data
2949                 $ref->{''} = $pr if (!exists $ref->{''});
2950         }
2951
2952         # filter out forks, by finding shortest prefix match for paths
2953         my @filtered;
2954  PROJECT:
2955         foreach my $pr (@$projects) {
2956                 # trie lookup
2957                 my $ref = \%trie;
2958         DIR:
2959                 foreach my $dir (split('/', $pr->{'path'})) {
2960                         if (exists $ref->{''}) {
2961                                 # found [shortest] prefix, is a fork - skip it
2962                                 push @{$ref->{''}{'forks'}}, $pr;
2963                                 next PROJECT;
2964                         }
2965                         if (!exists $ref->{$dir}) {
2966                                 # not in trie, cannot have prefix, not a fork
2967                                 push @filtered, $pr;
2968                                 next PROJECT;
2969                         }
2970                         # If the dir is there, we just walk one step down the trie.
2971                         $ref = $ref->{$dir};
2972                 }
2973                 # we ran out of trie
2974                 # (shouldn't happen: it's either no match, or end marker)
2975                 push @filtered, $pr;
2976         }
2977
2978         return @filtered;
2979 }
2980
2981 # note: fill_project_list_info must be run first,
2982 # for 'descr_long' and 'ctags' to be filled
2983 sub search_projects_list {
2984         my ($projlist, %opts) = @_;
2985         my $tagfilter  = $opts{'tagfilter'};
2986         my $searchtext = $opts{'searchtext'};
2987
2988         return @$projlist
2989                 unless ($tagfilter || $searchtext);
2990
2991         # searching projects require filling to be run before it;
2992         fill_project_list_info($projlist,
2993                                $tagfilter  ? 'ctags' : (),
2994                                $searchtext ? ('path', 'descr') : ());
2995         my @projects;
2996  PROJECT:
2997         foreach my $pr (@$projlist) {
2998
2999                 if ($tagfilter) {
3000                         next unless ref($pr->{'ctags'}) eq 'HASH';
3001                         next unless
3002                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3003                 }
3004
3005                 if ($searchtext) {
3006                         next unless
3007                                 $pr->{'path'} =~ /$searchtext/ ||
3008                                 $pr->{'descr_long'} =~ /$searchtext/;
3009                 }
3010
3011                 push @projects, $pr;
3012         }
3013
3014         return @projects;
3015 }
3016
3017 our $gitweb_project_owner = undef;
3018 sub git_get_project_list_from_file {
3019
3020         return if (defined $gitweb_project_owner);
3021
3022         $gitweb_project_owner = {};
3023         # read from file (url-encoded):
3024         # 'git%2Fgit.git Linus+Torvalds'
3025         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3026         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3027         if (-f $projects_list) {
3028                 open(my $fd, '<', $projects_list);
3029                 while (my $line = <$fd>) {
3030                         chomp $line;
3031                         my ($pr, $ow) = split ' ', $line;
3032                         $pr = unescape($pr);
3033                         $ow = unescape($ow);
3034                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3035                 }
3036                 close $fd;
3037         }
3038 }
3039
3040 sub git_get_project_owner {
3041         my $project = shift;
3042         my $owner;
3043
3044         return undef unless $project;
3045         $git_dir = "$projectroot/$project";
3046
3047         if (!defined $gitweb_project_owner) {
3048                 git_get_project_list_from_file();
3049         }
3050
3051         if (exists $gitweb_project_owner->{$project}) {
3052                 $owner = $gitweb_project_owner->{$project};
3053         }
3054         if (!defined $owner){
3055                 $owner = git_get_project_config('owner');
3056         }
3057         if (!defined $owner) {
3058                 $owner = get_file_owner("$git_dir");
3059         }
3060
3061         return $owner;
3062 }
3063
3064 sub git_get_last_activity {
3065         my ($path) = @_;
3066         my $fd;
3067
3068         $git_dir = "$projectroot/$path";
3069         open($fd, "-|", git_cmd(), 'for-each-ref',
3070              '--format=%(committer)',
3071              '--sort=-committerdate',
3072              '--count=1',
3073              'refs/heads') or return;
3074         my $most_recent = <$fd>;
3075         close $fd or return;
3076         if (defined $most_recent &&
3077             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3078                 my $timestamp = $1;
3079                 my $age = time - $timestamp;
3080                 return ($age, age_string($age));
3081         }
3082         return (undef, undef);
3083 }
3084
3085 # Implementation note: when a single remote is wanted, we cannot use 'git
3086 # remote show -n' because that command always work (assuming it's a remote URL
3087 # if it's not defined), and we cannot use 'git remote show' because that would
3088 # try to make a network roundtrip. So the only way to find if that particular
3089 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3090 # and when we find what we want.
3091 sub git_get_remotes_list {
3092         my $wanted = shift;
3093         my %remotes = ();
3094
3095         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3096         return unless $fd;
3097         while (my $remote = <$fd>) {
3098                 chomp $remote;
3099                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3100                 next if $wanted and not $remote eq $wanted;
3101                 my ($url, $key) = ($1, $2);
3102
3103                 $remotes{$remote} ||= { 'heads' => () };
3104                 $remotes{$remote}{$key} = $url;
3105         }
3106         close $fd or return;
3107         return wantarray ? %remotes : \%remotes;
3108 }
3109
3110 # Takes a hash of remotes as first parameter and fills it by adding the
3111 # available remote heads for each of the indicated remotes.
3112 sub fill_remote_heads {
3113         my $remotes = shift;
3114         my @heads = map { "remotes/$_" } keys %$remotes;
3115         my @remoteheads = git_get_heads_list(undef, @heads);
3116         foreach my $remote (keys %$remotes) {
3117                 $remotes->{$remote}{'heads'} = [ grep {
3118                         $_->{'name'} =~ s!^$remote/!!
3119                         } @remoteheads ];
3120         }
3121 }
3122
3123 sub git_get_references {
3124         my $type = shift || "";
3125         my %refs;
3126         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3127         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3128         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3129                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3130                 or return;
3131
3132         while (my $line = <$fd>) {
3133                 chomp $line;
3134                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3135                         if (defined $refs{$1}) {
3136                                 push @{$refs{$1}}, $2;
3137                         } else {
3138                                 $refs{$1} = [ $2 ];
3139                         }
3140                 }
3141         }
3142         close $fd or return;
3143         return \%refs;
3144 }
3145
3146 sub git_get_rev_name_tags {
3147         my $hash = shift || return undef;
3148
3149         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3150                 or return;
3151         my $name_rev = <$fd>;
3152         close $fd;
3153
3154         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3155                 return $1;
3156         } else {
3157                 # catches also '$hash undefined' output
3158                 return undef;
3159         }
3160 }
3161
3162 ## ----------------------------------------------------------------------
3163 ## parse to hash functions
3164
3165 sub parse_date {
3166         my $epoch = shift;
3167         my $tz = shift || "-0000";
3168
3169         my %date;
3170         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3171         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3172         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3173         $date{'hour'} = $hour;
3174         $date{'minute'} = $min;
3175         $date{'mday'} = $mday;
3176         $date{'day'} = $days[$wday];
3177         $date{'month'} = $months[$mon];
3178         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3179                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3180         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3181                              $mday, $months[$mon], $hour ,$min;
3182         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3183                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3184
3185         my ($tz_sign, $tz_hour, $tz_min) =
3186                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3187         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3188         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3189         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3190         $date{'hour_local'} = $hour;
3191         $date{'minute_local'} = $min;
3192         $date{'tz_local'} = $tz;
3193         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3194                                   1900+$year, $mon+1, $mday,
3195                                   $hour, $min, $sec, $tz);
3196         return %date;
3197 }
3198
3199 sub parse_tag {
3200         my $tag_id = shift;
3201         my %tag;
3202         my @comment;
3203
3204         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3205         $tag{'id'} = $tag_id;
3206         while (my $line = <$fd>) {
3207                 chomp $line;
3208                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3209                         $tag{'object'} = $1;
3210                 } elsif ($line =~ m/^type (.+)$/) {
3211                         $tag{'type'} = $1;
3212                 } elsif ($line =~ m/^tag (.+)$/) {
3213                         $tag{'name'} = $1;
3214                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3215                         $tag{'author'} = $1;
3216                         $tag{'author_epoch'} = $2;
3217                         $tag{'author_tz'} = $3;
3218                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3219                                 $tag{'author_name'}  = $1;
3220                                 $tag{'author_email'} = $2;
3221                         } else {
3222                                 $tag{'author_name'} = $tag{'author'};
3223                         }
3224                 } elsif ($line =~ m/--BEGIN/) {
3225                         push @comment, $line;
3226                         last;
3227                 } elsif ($line eq "") {
3228                         last;
3229                 }
3230         }
3231         push @comment, <$fd>;
3232         $tag{'comment'} = \@comment;
3233         close $fd or return;
3234         if (!defined $tag{'name'}) {
3235                 return
3236         };
3237         return %tag
3238 }
3239
3240 sub parse_commit_text {
3241         my ($commit_text, $withparents) = @_;
3242         my @commit_lines = split '\n', $commit_text;
3243         my %co;
3244
3245         pop @commit_lines; # Remove '\0'
3246
3247         if (! @commit_lines) {
3248                 return;
3249         }
3250
3251         my $header = shift @commit_lines;
3252         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3253                 return;
3254         }
3255         ($co{'id'}, my @parents) = split ' ', $header;
3256         while (my $line = shift @commit_lines) {
3257                 last if $line eq "\n";
3258                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3259                         $co{'tree'} = $1;
3260                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3261                         push @parents, $1;
3262                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3263                         $co{'author'} = to_utf8($1);
3264                         $co{'author_epoch'} = $2;
3265                         $co{'author_tz'} = $3;
3266                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3267                                 $co{'author_name'}  = $1;
3268                                 $co{'author_email'} = $2;
3269                         } else {
3270                                 $co{'author_name'} = $co{'author'};
3271                         }
3272                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3273                         $co{'committer'} = to_utf8($1);
3274                         $co{'committer_epoch'} = $2;
3275                         $co{'committer_tz'} = $3;
3276                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3277                                 $co{'committer_name'}  = $1;
3278                                 $co{'committer_email'} = $2;
3279                         } else {
3280                                 $co{'committer_name'} = $co{'committer'};
3281                         }
3282                 }
3283         }
3284         if (!defined $co{'tree'}) {
3285                 return;
3286         };
3287         $co{'parents'} = \@parents;
3288         $co{'parent'} = $parents[0];
3289
3290         foreach my $title (@commit_lines) {
3291                 $title =~ s/^    //;
3292                 if ($title ne "") {
3293                         $co{'title'} = chop_str($title, 80, 5);
3294                         # remove leading stuff of merges to make the interesting part visible
3295                         if (length($title) > 50) {
3296                                 $title =~ s/^Automatic //;
3297                                 $title =~ s/^merge (of|with) /Merge ... /i;
3298                                 if (length($title) > 50) {
3299                                         $title =~ s/(http|rsync):\/\///;
3300                                 }
3301                                 if (length($title) > 50) {
3302                                         $title =~ s/(master|www|rsync)\.//;
3303                                 }
3304                                 if (length($title) > 50) {
3305                                         $title =~ s/kernel.org:?//;
3306                                 }
3307                                 if (length($title) > 50) {
3308                                         $title =~ s/\/pub\/scm//;
3309                                 }
3310                         }
3311                         $co{'title_short'} = chop_str($title, 50, 5);
3312                         last;
3313                 }
3314         }
3315         if (! defined $co{'title'} || $co{'title'} eq "") {
3316                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3317         }
3318         # remove added spaces
3319         foreach my $line (@commit_lines) {
3320                 $line =~ s/^    //;
3321         }
3322         $co{'comment'} = \@commit_lines;
3323
3324         my $age = time - $co{'committer_epoch'};
3325         $co{'age'} = $age;
3326         $co{'age_string'} = age_string($age);
3327         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3328         if ($age > 60*60*24*7*2) {
3329                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3330                 $co{'age_string_age'} = $co{'age_string'};
3331         } else {
3332                 $co{'age_string_date'} = $co{'age_string'};
3333                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3334         }
3335         return %co;
3336 }
3337
3338 sub parse_commit {
3339         my ($commit_id) = @_;
3340         my %co;
3341
3342         local $/ = "\0";
3343
3344         open my $fd, "-|", git_cmd(), "rev-list",
3345                 "--parents",
3346                 "--header",
3347                 "--max-count=1",
3348                 $commit_id,
3349                 "--",
3350                 or die_error(500, "Open git-rev-list failed");
3351         %co = parse_commit_text(<$fd>, 1);
3352         close $fd;
3353
3354         return %co;
3355 }
3356
3357 sub parse_commits {
3358         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3359         my @cos;
3360
3361         $maxcount ||= 1;
3362         $skip ||= 0;
3363
3364         local $/ = "\0";
3365
3366         open my $fd, "-|", git_cmd(), "rev-list",
3367                 "--header",
3368                 @args,
3369                 ("--max-count=" . $maxcount),
3370                 ("--skip=" . $skip),
3371                 @extra_options,
3372                 $commit_id,
3373                 "--",
3374                 ($filename ? ($filename) : ())
3375                 or die_error(500, "Open git-rev-list failed");
3376         while (my $line = <$fd>) {
3377                 my %co = parse_commit_text($line);
3378                 push @cos, \%co;
3379         }
3380         close $fd;
3381
3382         return wantarray ? @cos : \@cos;
3383 }
3384
3385 # parse line of git-diff-tree "raw" output
3386 sub parse_difftree_raw_line {
3387         my $line = shift;
3388         my %res;
3389
3390         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3391         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3392         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3393                 $res{'from_mode'} = $1;
3394                 $res{'to_mode'} = $2;
3395                 $res{'from_id'} = $3;
3396                 $res{'to_id'} = $4;
3397                 $res{'status'} = $5;
3398                 $res{'similarity'} = $6;
3399                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3400                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3401                 } else {
3402                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3403                 }
3404         }
3405         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3406         # combined diff (for merge commit)
3407         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3408                 $res{'nparents'}  = length($1);
3409                 $res{'from_mode'} = [ split(' ', $2) ];
3410                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3411                 $res{'from_id'} = [ split(' ', $3) ];
3412                 $res{'to_id'} = pop @{$res{'from_id'}};
3413                 $res{'status'} = [ split('', $4) ];
3414                 $res{'to_file'} = unquote($5);
3415         }
3416         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3417         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3418                 $res{'commit'} = $1;
3419         }
3420
3421         return wantarray ? %res : \%res;
3422 }
3423
3424 # wrapper: return parsed line of git-diff-tree "raw" output
3425 # (the argument might be raw line, or parsed info)
3426 sub parsed_difftree_line {
3427         my $line_or_ref = shift;
3428
3429         if (ref($line_or_ref) eq "HASH") {
3430                 # pre-parsed (or generated by hand)
3431                 return $line_or_ref;
3432         } else {
3433                 return parse_difftree_raw_line($line_or_ref);
3434         }
3435 }
3436
3437 # parse line of git-ls-tree output
3438 sub parse_ls_tree_line {
3439         my $line = shift;
3440         my %opts = @_;
3441         my %res;
3442
3443         if ($opts{'-l'}) {
3444                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3445                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3446
3447                 $res{'mode'} = $1;
3448                 $res{'type'} = $2;
3449                 $res{'hash'} = $3;
3450                 $res{'size'} = $4;
3451                 if ($opts{'-z'}) {
3452                         $res{'name'} = $5;
3453                 } else {
3454                         $res{'name'} = unquote($5);
3455                 }
3456         } else {
3457                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3458                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3459
3460                 $res{'mode'} = $1;
3461                 $res{'type'} = $2;
3462                 $res{'hash'} = $3;
3463                 if ($opts{'-z'}) {
3464                         $res{'name'} = $4;
3465                 } else {
3466                         $res{'name'} = unquote($4);
3467                 }
3468         }
3469
3470         return wantarray ? %res : \%res;
3471 }
3472
3473 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3474 sub parse_from_to_diffinfo {
3475         my ($diffinfo, $from, $to, @parents) = @_;
3476
3477         if ($diffinfo->{'nparents'}) {
3478                 # combined diff
3479                 $from->{'file'} = [];
3480                 $from->{'href'} = [];
3481                 fill_from_file_info($diffinfo, @parents)
3482                         unless exists $diffinfo->{'from_file'};
3483                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3484                         $from->{'file'}[$i] =
3485                                 defined $diffinfo->{'from_file'}[$i] ?
3486                                         $diffinfo->{'from_file'}[$i] :
3487                                         $diffinfo->{'to_file'};
3488                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3489                                 $from->{'href'}[$i] = href(action=>"blob",
3490                                                            hash_base=>$parents[$i],
3491                                                            hash=>$diffinfo->{'from_id'}[$i],
3492                                                            file_name=>$from->{'file'}[$i]);
3493                         } else {
3494                                 $from->{'href'}[$i] = undef;
3495                         }
3496                 }
3497         } else {
3498                 # ordinary (not combined) diff
3499                 $from->{'file'} = $diffinfo->{'from_file'};
3500                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3501                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3502                                                hash=>$diffinfo->{'from_id'},
3503                                                file_name=>$from->{'file'});
3504                 } else {
3505                         delete $from->{'href'};
3506                 }
3507         }
3508
3509         $to->{'file'} = $diffinfo->{'to_file'};
3510         if (!is_deleted($diffinfo)) { # file exists in result
3511                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3512                                      hash=>$diffinfo->{'to_id'},
3513                                      file_name=>$to->{'file'});
3514         } else {
3515                 delete $to->{'href'};
3516         }
3517 }
3518
3519 ## ......................................................................
3520 ## parse to array of hashes functions
3521
3522 sub git_get_heads_list {
3523         my ($limit, @classes) = @_;
3524         @classes = ('heads') unless @classes;
3525         my @patterns = map { "refs/$_" } @classes;
3526         my @headslist;
3527
3528         open my $fd, '-|', git_cmd(), 'for-each-ref',
3529                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3530                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3531                 @patterns
3532                 or return;
3533         while (my $line = <$fd>) {
3534                 my %ref_item;
3535
3536                 chomp $line;
3537                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3538                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3539                 my ($committer, $epoch, $tz) =
3540                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3541                 $ref_item{'fullname'}  = $name;
3542                 $name =~ s!^refs/(?:head|remote)s/!!;
3543
3544                 $ref_item{'name'}  = $name;
3545                 $ref_item{'id'}    = $hash;
3546                 $ref_item{'title'} = $title || '(no commit message)';
3547                 $ref_item{'epoch'} = $epoch;
3548                 if ($epoch) {
3549                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3550                 } else {
3551                         $ref_item{'age'} = "unknown";
3552                 }
3553
3554                 push @headslist, \%ref_item;
3555         }
3556         close $fd;
3557
3558         return wantarray ? @headslist : \@headslist;
3559 }
3560
3561 sub git_get_tags_list {
3562         my $limit = shift;
3563         my @tagslist;
3564
3565         open my $fd, '-|', git_cmd(), 'for-each-ref',
3566                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3567                 '--format=%(objectname) %(objecttype) %(refname) '.
3568                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3569                 'refs/tags'
3570                 or return;
3571         while (my $line = <$fd>) {
3572                 my %ref_item;
3573
3574                 chomp $line;
3575                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3576                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3577                 my ($creator, $epoch, $tz) =
3578                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3579                 $ref_item{'fullname'} = $name;
3580                 $name =~ s!^refs/tags/!!;
3581
3582                 $ref_item{'type'} = $type;
3583                 $ref_item{'id'} = $id;
3584                 $ref_item{'name'} = $name;
3585                 if ($type eq "tag") {
3586                         $ref_item{'subject'} = $title;
3587                         $ref_item{'reftype'} = $reftype;
3588                         $ref_item{'refid'}   = $refid;
3589                 } else {
3590                         $ref_item{'reftype'} = $type;
3591                         $ref_item{'refid'}   = $id;
3592                 }
3593
3594                 if ($type eq "tag" || $type eq "commit") {
3595                         $ref_item{'epoch'} = $epoch;
3596                         if ($epoch) {
3597                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3598                         } else {
3599                                 $ref_item{'age'} = "unknown";
3600                         }
3601                 }
3602
3603                 push @tagslist, \%ref_item;
3604         }
3605         close $fd;
3606
3607         return wantarray ? @tagslist : \@tagslist;
3608 }
3609
3610 ## ----------------------------------------------------------------------
3611 ## filesystem-related functions
3612
3613 sub get_file_owner {
3614         my $path = shift;
3615
3616         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3617         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3618         if (!defined $gcos) {
3619                 return undef;
3620         }
3621         my $owner = $gcos;
3622         $owner =~ s/[,;].*$//;
3623         return to_utf8($owner);
3624 }
3625
3626 # assume that file exists
3627 sub insert_file {
3628         my $filename = shift;
3629
3630         open my $fd, '<', $filename;
3631         print map { to_utf8($_) } <$fd>;
3632         close $fd;
3633 }
3634
3635 ## ......................................................................
3636 ## mimetype related functions
3637
3638 sub mimetype_guess_file {
3639         my $filename = shift;
3640         my $mimemap = shift;
3641         -r $mimemap or return undef;
3642
3643         my %mimemap;
3644         open(my $mh, '<', $mimemap) or return undef;
3645         while (<$mh>) {
3646                 next if m/^#/; # skip comments
3647                 my ($mimetype, @exts) = split(/\s+/);
3648                 foreach my $ext (@exts) {
3649                         $mimemap{$ext} = $mimetype;
3650                 }
3651         }
3652         close($mh);
3653
3654         $filename =~ /\.([^.]*)$/;
3655         return $mimemap{$1};
3656 }
3657
3658 sub mimetype_guess {
3659         my $filename = shift;
3660         my $mime;
3661         $filename =~ /\./ or return undef;
3662
3663         if ($mimetypes_file) {
3664                 my $file = $mimetypes_file;
3665                 if ($file !~ m!^/!) { # if it is relative path
3666                         # it is relative to project
3667                         $file = "$projectroot/$project/$file";
3668                 }
3669                 $mime = mimetype_guess_file($filename, $file);
3670         }
3671         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3672         return $mime;
3673 }
3674
3675 sub blob_mimetype {
3676         my $fd = shift;
3677         my $filename = shift;
3678
3679         if ($filename) {
3680                 my $mime = mimetype_guess($filename);
3681                 $mime and return $mime;
3682         }
3683
3684         # just in case
3685         return $default_blob_plain_mimetype unless $fd;
3686
3687         if (-T $fd) {
3688                 return 'text/plain';
3689         } elsif (! $filename) {
3690                 return 'application/octet-stream';
3691         } elsif ($filename =~ m/\.png$/i) {
3692                 return 'image/png';
3693         } elsif ($filename =~ m/\.gif$/i) {
3694                 return 'image/gif';
3695         } elsif ($filename =~ m/\.jpe?g$/i) {
3696                 return 'image/jpeg';
3697         } else {
3698                 return 'application/octet-stream';
3699         }
3700 }
3701
3702 sub blob_contenttype {
3703         my ($fd, $file_name, $type) = @_;
3704
3705         $type ||= blob_mimetype($fd, $file_name);
3706         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3707                 $type .= "; charset=$default_text_plain_charset";
3708         }
3709
3710         return $type;
3711 }
3712
3713 # guess file syntax for syntax highlighting; return undef if no highlighting
3714 # the name of syntax can (in the future) depend on syntax highlighter used
3715 sub guess_file_syntax {
3716         my ($highlight, $mimetype, $file_name) = @_;
3717         return undef unless ($highlight && defined $file_name);
3718         my $basename = basename($file_name, '.in');
3719         return $highlight_basename{$basename}
3720                 if exists $highlight_basename{$basename};
3721
3722         $basename =~ /\.([^.]*)$/;
3723         my $ext = $1 or return undef;
3724         return $highlight_ext{$ext}
3725                 if exists $highlight_ext{$ext};
3726
3727         return undef;
3728 }
3729
3730 # run highlighter and return FD of its output,
3731 # or return original FD if no highlighting
3732 sub run_highlighter {
3733         my ($fd, $highlight, $syntax) = @_;
3734         return $fd unless ($highlight && defined $syntax);
3735
3736         close $fd;
3737         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3738                   quote_command($highlight_bin).
3739                   " --replace-tabs=8 --fragment --syntax $syntax |"
3740                 or die_error(500, "Couldn't open file or run syntax highlighter");
3741         return $fd;
3742 }
3743
3744 ## ======================================================================
3745 ## functions printing HTML: header, footer, error page
3746
3747 sub get_page_title {
3748         my $title = to_utf8($site_name);
3749
3750         unless (defined $project) {
3751                 if (defined $project_filter) {
3752                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3753                 }
3754                 return $title;
3755         }
3756         $title .= " - " . to_utf8($project);
3757
3758         return $title unless (defined $action);
3759         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3760
3761         return $title unless (defined $file_name);
3762         $title .= " - " . esc_path($file_name);
3763         if ($action eq "tree" && $file_name !~ m|/$|) {
3764                 $title .= "/";
3765         }
3766
3767         return $title;
3768 }
3769
3770 sub get_content_type_html {
3771         # require explicit support from the UA if we are to send the page as
3772         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3773         # we have to do this because MSIE sometimes globs '*/*', pretending to
3774         # support xhtml+xml but choking when it gets what it asked for.
3775         if (defined $cgi->http('HTTP_ACCEPT') &&
3776             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3777             $cgi->Accept('application/xhtml+xml') != 0) {
3778                 return 'application/xhtml+xml';
3779         } else {
3780                 return 'text/html';
3781         }
3782 }
3783
3784 sub print_feed_meta {
3785         if (defined $project) {
3786                 my %href_params = get_feed_info();
3787                 if (!exists $href_params{'-title'}) {
3788                         $href_params{'-title'} = 'log';
3789                 }
3790
3791                 foreach my $format (qw(RSS Atom)) {
3792                         my $type = lc($format);
3793                         my %link_attr = (
3794                                 '-rel' => 'alternate',
3795                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3796                                 '-type' => "application/$type+xml"
3797                         );
3798
3799                         $href_params{'action'} = $type;
3800                         $link_attr{'-href'} = href(%href_params);
3801                         print "<link ".
3802                               "rel=\"$link_attr{'-rel'}\" ".
3803                               "title=\"$link_attr{'-title'}\" ".
3804                               "href=\"$link_attr{'-href'}\" ".
3805                               "type=\"$link_attr{'-type'}\" ".
3806                               "/>\n";
3807
3808                         $href_params{'extra_options'} = '--no-merges';
3809                         $link_attr{'-href'} = href(%href_params);
3810                         $link_attr{'-title'} .= ' (no merges)';
3811                         print "<link ".
3812                               "rel=\"$link_attr{'-rel'}\" ".
3813                               "title=\"$link_attr{'-title'}\" ".
3814                               "href=\"$link_attr{'-href'}\" ".
3815                               "type=\"$link_attr{'-type'}\" ".
3816                               "/>\n";
3817                 }
3818
3819         } else {
3820                 printf('<link rel="alternate" title="%s projects list" '.
3821                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3822                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3823                 printf('<link rel="alternate" title="%s projects feeds" '.
3824                        'href="%s" type="text/x-opml" />'."\n",
3825                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3826         }
3827 }
3828
3829 sub print_header_links {
3830         my $status = shift;
3831
3832         # print out each stylesheet that exist, providing backwards capability
3833         # for those people who defined $stylesheet in a config file
3834         if (defined $stylesheet) {
3835                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3836         } else {
3837                 foreach my $stylesheet (@stylesheets) {
3838                         next unless $stylesheet;
3839                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3840                 }
3841         }
3842         print_feed_meta()
3843                 if ($status eq '200 OK');
3844         if (defined $favicon) {
3845                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3846         }
3847 }
3848
3849 sub print_nav_breadcrumbs_path {
3850         my $dirprefix = undef;
3851         while (my $part = shift) {
3852                 $dirprefix .= "/" if defined $dirprefix;
3853                 $dirprefix .= $part;
3854                 print $cgi->a({-href => href(project => undef,
3855                                              project_filter => $dirprefix,
3856                                              action => "project_list")},
3857                               esc_html($part)) . " / ";
3858         }
3859 }
3860
3861 sub print_nav_breadcrumbs {
3862         my %opts = @_;
3863
3864         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3865         if (defined $project) {
3866                 my @dirname = split '/', $project;
3867                 my $projectbasename = pop @dirname;
3868                 print_nav_breadcrumbs_path(@dirname);
3869                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3870                 if (defined $action) {
3871                         my $action_print = $action ;
3872                         if (defined $opts{-action_extra}) {
3873                                 $action_print = $cgi->a({-href => href(action=>$action)},
3874                                         $action);
3875                         }
3876                         print " / $action_print";
3877                 }
3878                 if (defined $opts{-action_extra}) {
3879                         print " / $opts{-action_extra}";
3880                 }
3881                 print "\n";
3882         } elsif (defined $project_filter) {
3883                 print_nav_breadcrumbs_path(split '/', $project_filter);
3884         }
3885 }
3886
3887 sub print_search_form {
3888         if (!defined $searchtext) {
3889                 $searchtext = "";
3890         }
3891         my $search_hash;
3892         if (defined $hash_base) {
3893                 $search_hash = $hash_base;
3894         } elsif (defined $hash) {
3895                 $search_hash = $hash;
3896         } else {
3897                 $search_hash = "HEAD";
3898         }
3899         my $action = $my_uri;
3900         my $use_pathinfo = gitweb_check_feature('pathinfo');
3901         if ($use_pathinfo) {
3902                 $action .= "/".esc_url($project);
3903         }
3904         print $cgi->startform(-method => "get", -action => $action) .
3905               "<div class=\"search\">\n" .
3906               (!$use_pathinfo &&
3907               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3908               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3909               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3910               $cgi->popup_menu(-name => 'st', -default => 'commit',
3911                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3912               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3913               " search:\n",
3914               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
3915               "<span title=\"Extended regular expression\">" .
3916               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3917                              -checked => $search_use_regexp) .
3918               "</span>" .
3919               "</div>" .
3920               $cgi->end_form() . "\n";
3921 }
3922
3923 sub git_header_html {
3924         my $status = shift || "200 OK";
3925         my $expires = shift;
3926         my %opts = @_;
3927
3928         my $title = get_page_title();
3929         my $content_type = get_content_type_html();
3930         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3931                            -status=> $status, -expires => $expires)
3932                 unless ($opts{'-no_http_header'});
3933         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3934         print <<EOF;
3935 <?xml version="1.0" encoding="utf-8"?>
3936 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3937 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3938 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3939 <!-- git core binaries version $git_version -->
3940 <head>
3941 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3942 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3943 <meta name="robots" content="index, nofollow"/>
3944 <title>$title</title>
3945 EOF
3946         # the stylesheet, favicon etc urls won't work correctly with path_info
3947         # unless we set the appropriate base URL
3948         if ($ENV{'PATH_INFO'}) {
3949                 print "<base href=\"".esc_url($base_url)."\" />\n";
3950         }
3951         print_header_links($status);
3952
3953         if (defined $site_html_head_string) {
3954                 print to_utf8($site_html_head_string);
3955         }
3956
3957         print "</head>\n" .
3958               "<body>\n";
3959
3960         if (defined $site_header && -f $site_header) {
3961                 insert_file($site_header);
3962         }
3963
3964         print "<div class=\"page_header\">\n";
3965         if (defined $logo) {
3966                 print $cgi->a({-href => esc_url($logo_url),
3967                                -title => $logo_label},
3968                               $cgi->img({-src => esc_url($logo),
3969                                          -width => 72, -height => 27,
3970                                          -alt => "git",
3971                                          -class => "logo"}));
3972         }
3973         print_nav_breadcrumbs(%opts);
3974         print "</div>\n";
3975
3976         my $have_search = gitweb_check_feature('search');
3977         if (defined $project && $have_search) {
3978                 print_search_form();
3979         }
3980 }
3981
3982 sub git_footer_html {
3983         my $feed_class = 'rss_logo';
3984
3985         print "<div class=\"page_footer\">\n";
3986         if (defined $project) {
3987                 my $descr = git_get_project_description($project);
3988                 if (defined $descr) {
3989                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3990                 }
3991
3992                 my %href_params = get_feed_info();
3993                 if (!%href_params) {
3994                         $feed_class .= ' generic';
3995                 }
3996                 $href_params{'-title'} ||= 'log';
3997
3998                 foreach my $format (qw(RSS Atom)) {
3999                         $href_params{'action'} = lc($format);
4000                         print $cgi->a({-href => href(%href_params),
4001                                       -title => "$href_params{'-title'} $format feed",
4002                                       -class => $feed_class}, $format)."\n";
4003                 }
4004
4005         } else {
4006                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4007                                              project_filter => $project_filter),
4008                               -class => $feed_class}, "OPML") . " ";
4009                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4010                                              project_filter => $project_filter),
4011                               -class => $feed_class}, "TXT") . "\n";
4012         }
4013         print "</div>\n"; # class="page_footer"
4014
4015         if (defined $t0 && gitweb_check_feature('timed')) {
4016                 print "<div id=\"generating_info\">\n";
4017                 print 'This page took '.
4018                       '<span id="generating_time" class="time_span">'.
4019                       tv_interval($t0, [ gettimeofday() ]).
4020                       ' seconds </span>'.
4021                       ' and '.
4022                       '<span id="generating_cmd">'.
4023                       $number_of_git_cmds.
4024                       '</span> git commands '.
4025                       " to generate.\n";
4026                 print "</div>\n"; # class="page_footer"
4027         }
4028
4029         if (defined $site_footer && -f $site_footer) {
4030                 insert_file($site_footer);
4031         }
4032
4033         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4034         if (defined $action &&
4035             $action eq 'blame_incremental') {
4036                 print qq!<script type="text/javascript">\n!.
4037                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4038                       qq!           "!. href() .qq!");\n!.
4039                       qq!</script>\n!;
4040         } else {
4041                 my ($jstimezone, $tz_cookie, $datetime_class) =
4042                         gitweb_get_feature('javascript-timezone');
4043
4044                 print qq!<script type="text/javascript">\n!.
4045                       qq!window.onload = function () {\n!;
4046                 if (gitweb_check_feature('javascript-actions')) {
4047                         print qq!       fixLinks();\n!;
4048                 }
4049                 if ($jstimezone && $tz_cookie && $datetime_class) {
4050                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4051                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4052                 }
4053                 print qq!};\n!.
4054                       qq!</script>\n!;
4055         }
4056
4057         print "</body>\n" .
4058               "</html>";
4059 }
4060
4061 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4062 # Example: die_error(404, 'Hash not found')
4063 # By convention, use the following status codes (as defined in RFC 2616):
4064 # 400: Invalid or missing CGI parameters, or
4065 #      requested object exists but has wrong type.
4066 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4067 #      this server or project.
4068 # 404: Requested object/revision/project doesn't exist.
4069 # 500: The server isn't configured properly, or
4070 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4071 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4072 # 503: The server is currently unavailable (because it is overloaded,
4073 #      or down for maintenance).  Generally, this is a temporary state.
4074 sub die_error {
4075         my $status = shift || 500;
4076         my $error = esc_html(shift) || "Internal Server Error";
4077         my $extra = shift;
4078         my %opts = @_;
4079
4080         my %http_responses = (
4081                 400 => '400 Bad Request',
4082                 403 => '403 Forbidden',
4083                 404 => '404 Not Found',
4084                 500 => '500 Internal Server Error',
4085                 503 => '503 Service Unavailable',
4086         );
4087         git_header_html($http_responses{$status}, undef, %opts);
4088         print <<EOF;
4089 <div class="page_body">
4090 <br /><br />
4091 $status - $error
4092 <br />
4093 EOF
4094         if (defined $extra) {
4095                 print "<hr />\n" .
4096                       "$extra\n";
4097         }
4098         print "</div>\n";
4099
4100         git_footer_html();
4101         goto DONE_GITWEB
4102                 unless ($opts{'-error_handler'});
4103 }
4104
4105 ## ----------------------------------------------------------------------
4106 ## functions printing or outputting HTML: navigation
4107
4108 sub git_print_page_nav {
4109         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4110         $extra = '' if !defined $extra; # pager or formats
4111
4112         my @navs = qw(summary shortlog log commit commitdiff tree);
4113         if ($suppress) {
4114                 @navs = grep { $_ ne $suppress } @navs;
4115         }
4116
4117         my %arg = map { $_ => {action=>$_} } @navs;
4118         if (defined $head) {
4119                 for (qw(commit commitdiff)) {
4120                         $arg{$_}{'hash'} = $head;
4121                 }
4122                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4123                         for (qw(shortlog log)) {
4124                                 $arg{$_}{'hash'} = $head;
4125                         }
4126                 }
4127         }
4128
4129         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4130         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4131
4132         my @actions = gitweb_get_feature('actions');
4133         my %repl = (
4134                 '%' => '%',
4135                 'n' => $project,         # project name
4136                 'f' => $git_dir,         # project path within filesystem
4137                 'h' => $treehead || '',  # current hash ('h' parameter)
4138                 'b' => $treebase || '',  # hash base ('hb' parameter)
4139         );
4140         while (@actions) {
4141                 my ($label, $link, $pos) = splice(@actions,0,3);
4142                 # insert
4143                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4144                 # munch munch
4145                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4146                 $arg{$label}{'_href'} = $link;
4147         }
4148
4149         print "<div class=\"page_nav\">\n" .
4150                 (join " | ",
4151                  map { $_ eq $current ?
4152                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4153                  } @navs);
4154         print "<br/>\n$extra<br/>\n" .
4155               "</div>\n";
4156 }
4157
4158 # returns a submenu for the nagivation of the refs views (tags, heads,
4159 # remotes) with the current view disabled and the remotes view only
4160 # available if the feature is enabled
4161 sub format_ref_views {
4162         my ($current) = @_;
4163         my @ref_views = qw{tags heads};
4164         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4165         return join " | ", map {
4166                 $_ eq $current ? $_ :
4167                 $cgi->a({-href => href(action=>$_)}, $_)
4168         } @ref_views
4169 }
4170
4171 sub format_paging_nav {
4172         my ($action, $page, $has_next_link) = @_;
4173         my $paging_nav;
4174
4175
4176         if ($page > 0) {
4177                 $paging_nav .=
4178                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4179                         " &sdot; " .
4180                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4181                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4182         } else {
4183                 $paging_nav .= "first &sdot; prev";
4184         }
4185
4186         if ($has_next_link) {
4187                 $paging_nav .= " &sdot; " .
4188                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4189                                  -accesskey => "n", -title => "Alt-n"}, "next");
4190         } else {
4191                 $paging_nav .= " &sdot; next";
4192         }
4193
4194         return $paging_nav;
4195 }
4196
4197 ## ......................................................................
4198 ## functions printing or outputting HTML: div
4199
4200 sub git_print_header_div {
4201         my ($action, $title, $hash, $hash_base) = @_;
4202         my %args = ();
4203
4204         $args{'action'} = $action;
4205         $args{'hash'} = $hash if $hash;
4206         $args{'hash_base'} = $hash_base if $hash_base;
4207
4208         print "<div class=\"header\">\n" .
4209               $cgi->a({-href => href(%args), -class => "title"},
4210               $title ? $title : $action) .
4211               "\n</div>\n";
4212 }
4213
4214 sub format_repo_url {
4215         my ($name, $url) = @_;
4216         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4217 }
4218
4219 # Group output by placing it in a DIV element and adding a header.
4220 # Options for start_div() can be provided by passing a hash reference as the
4221 # first parameter to the function.
4222 # Options to git_print_header_div() can be provided by passing an array
4223 # reference. This must follow the options to start_div if they are present.
4224 # The content can be a scalar, which is output as-is, a scalar reference, which
4225 # is output after html escaping, an IO handle passed either as *handle or
4226 # *handle{IO}, or a function reference. In the latter case all following
4227 # parameters will be taken as argument to the content function call.
4228 sub git_print_section {
4229         my ($div_args, $header_args, $content);
4230         my $arg = shift;
4231         if (ref($arg) eq 'HASH') {
4232                 $div_args = $arg;
4233                 $arg = shift;
4234         }
4235         if (ref($arg) eq 'ARRAY') {
4236                 $header_args = $arg;
4237                 $arg = shift;
4238         }
4239         $content = $arg;
4240
4241         print $cgi->start_div($div_args);
4242         git_print_header_div(@$header_args);
4243
4244         if (ref($content) eq 'CODE') {
4245                 $content->(@_);
4246         } elsif (ref($content) eq 'SCALAR') {
4247                 print esc_html($$content);
4248         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4249                 print <$content>;
4250         } elsif (!ref($content) && defined($content)) {
4251                 print $content;
4252         }
4253
4254         print $cgi->end_div;
4255 }
4256
4257 sub format_timestamp_html {
4258         my $date = shift;
4259         my $strtime = $date->{'rfc2822'};
4260
4261         my (undef, undef, $datetime_class) =
4262                 gitweb_get_feature('javascript-timezone');
4263         if ($datetime_class) {
4264                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4265         }
4266
4267         my $localtime_format = '(%02d:%02d %s)';
4268         if ($date->{'hour_local'} < 6) {
4269                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4270         }
4271         $strtime .= ' ' .
4272                     sprintf($localtime_format,
4273                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4274
4275         return $strtime;
4276 }
4277
4278 # Outputs the author name and date in long form
4279 sub git_print_authorship {
4280         my $co = shift;
4281         my %opts = @_;
4282         my $tag = $opts{-tag} || 'div';
4283         my $author = $co->{'author_name'};
4284
4285         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4286         print "<$tag class=\"author_date\">" .
4287               format_search_author($author, "author", esc_html($author)) .
4288               " [".format_timestamp_html(\%ad)."]".
4289               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4290               "</$tag>\n";
4291 }
4292
4293 # Outputs table rows containing the full author or committer information,
4294 # in the format expected for 'commit' view (& similar).
4295 # Parameters are a commit hash reference, followed by the list of people
4296 # to output information for. If the list is empty it defaults to both
4297 # author and committer.
4298 sub git_print_authorship_rows {
4299         my $co = shift;
4300         # too bad we can't use @people = @_ || ('author', 'committer')
4301         my @people = @_;
4302         @people = ('author', 'committer') unless @people;
4303         foreach my $who (@people) {
4304                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4305                 print "<tr><td>$who</td><td>" .
4306                       format_search_author($co->{"${who}_name"}, $who,
4307                                            esc_html($co->{"${who}_name"})) . " " .
4308                       format_search_author($co->{"${who}_email"}, $who,
4309                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4310                       "</td><td rowspan=\"2\">" .
4311                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4312                       "</td></tr>\n" .
4313                       "<tr>" .
4314                       "<td></td><td>" .
4315                       format_timestamp_html(\%wd) .
4316                       "</td>" .
4317                       "</tr>\n";
4318         }
4319 }
4320
4321 sub git_print_page_path {
4322         my $name = shift;
4323         my $type = shift;
4324         my $hb = shift;
4325
4326
4327         print "<div class=\"page_path\">";
4328         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4329                       -title => 'tree root'}, to_utf8("[$project]"));
4330         print " / ";
4331         if (defined $name) {
4332                 my @dirname = split '/', $name;
4333                 my $basename = pop @dirname;
4334                 my $fullname = '';
4335
4336                 foreach my $dir (@dirname) {
4337                         $fullname .= ($fullname ? '/' : '') . $dir;
4338                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4339                                                      hash_base=>$hb),
4340                                       -title => $fullname}, esc_path($dir));
4341                         print " / ";
4342                 }
4343                 if (defined $type && $type eq 'blob') {
4344                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4345                                                      hash_base=>$hb),
4346                                       -title => $name}, esc_path($basename));
4347                 } elsif (defined $type && $type eq 'tree') {
4348                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4349                                                      hash_base=>$hb),
4350                                       -title => $name}, esc_path($basename));
4351                         print " / ";
4352                 } else {
4353                         print esc_path($basename);
4354                 }
4355         }
4356         print "<br/></div>\n";
4357 }
4358
4359 sub git_print_log {
4360         my $log = shift;
4361         my %opts = @_;
4362
4363         if ($opts{'-remove_title'}) {
4364                 # remove title, i.e. first line of log
4365                 shift @$log;
4366         }
4367         # remove leading empty lines
4368         while (defined $log->[0] && $log->[0] eq "") {
4369                 shift @$log;
4370         }
4371
4372         # print log
4373         my $signoff = 0;
4374         my $empty = 0;
4375         foreach my $line (@$log) {
4376                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4377                         $signoff = 1;
4378                         $empty = 0;
4379                         if (! $opts{'-remove_signoff'}) {
4380                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4381                                 next;
4382                         } else {
4383                                 # remove signoff lines
4384                                 next;
4385                         }
4386                 } else {
4387                         $signoff = 0;
4388                 }
4389
4390                 # print only one empty line
4391                 # do not print empty line after signoff
4392                 if ($line eq "") {
4393                         next if ($empty || $signoff);
4394                         $empty = 1;
4395                 } else {
4396                         $empty = 0;
4397                 }
4398
4399                 print format_log_line_html($line) . "<br/>\n";
4400         }
4401
4402         if ($opts{'-final_empty_line'}) {
4403                 # end with single empty line
4404                 print "<br/>\n" unless $empty;
4405         }
4406 }
4407
4408 # return link target (what link points to)
4409 sub git_get_link_target {
4410         my $hash = shift;
4411         my $link_target;
4412
4413         # read link
4414         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4415                 or return;
4416         {
4417                 local $/ = undef;
4418                 $link_target = <$fd>;
4419         }
4420         close $fd
4421                 or return;
4422
4423         return $link_target;
4424 }
4425
4426 # given link target, and the directory (basedir) the link is in,
4427 # return target of link relative to top directory (top tree);
4428 # return undef if it is not possible (including absolute links).
4429 sub normalize_link_target {
4430         my ($link_target, $basedir) = @_;
4431
4432         # absolute symlinks (beginning with '/') cannot be normalized
4433         return if (substr($link_target, 0, 1) eq '/');
4434
4435         # normalize link target to path from top (root) tree (dir)
4436         my $path;
4437         if ($basedir) {
4438                 $path = $basedir . '/' . $link_target;
4439         } else {
4440                 # we are in top (root) tree (dir)
4441                 $path = $link_target;
4442         }
4443
4444         # remove //, /./, and /../
4445         my @path_parts;
4446         foreach my $part (split('/', $path)) {
4447                 # discard '.' and ''
4448                 next if (!$part || $part eq '.');
4449                 # handle '..'
4450                 if ($part eq '..') {
4451                         if (@path_parts) {
4452                                 pop @path_parts;
4453                         } else {
4454                                 # link leads outside repository (outside top dir)
4455                                 return;
4456                         }
4457                 } else {
4458                         push @path_parts, $part;
4459                 }
4460         }
4461         $path = join('/', @path_parts);
4462
4463         return $path;
4464 }
4465
4466 # print tree entry (row of git_tree), but without encompassing <tr> element
4467 sub git_print_tree_entry {
4468         my ($t, $basedir, $hash_base, $have_blame) = @_;
4469
4470         my %base_key = ();
4471         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4472
4473         # The format of a table row is: mode list link.  Where mode is
4474         # the mode of the entry, list is the name of the entry, an href,
4475         # and link is the action links of the entry.
4476
4477         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4478         if (exists $t->{'size'}) {
4479                 print "<td class=\"size\">$t->{'size'}</td>\n";
4480         }
4481         if ($t->{'type'} eq "blob") {
4482                 print "<td class=\"list\">" .
4483                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4484                                                file_name=>"$basedir$t->{'name'}", %base_key),
4485                                 -class => "list"}, esc_path($t->{'name'}));
4486                 if (S_ISLNK(oct $t->{'mode'})) {
4487                         my $link_target = git_get_link_target($t->{'hash'});
4488                         if ($link_target) {
4489                                 my $norm_target = normalize_link_target($link_target, $basedir);
4490                                 if (defined $norm_target) {
4491                                         print " -> " .
4492                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4493                                                                      file_name=>$norm_target),
4494                                                        -title => $norm_target}, esc_path($link_target));
4495                                 } else {
4496                                         print " -> " . esc_path($link_target);
4497                                 }
4498                         }
4499                 }
4500                 print "</td>\n";
4501                 print "<td class=\"link\">";
4502                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4503                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4504                               "blob");
4505                 if ($have_blame) {
4506                         print " | " .
4507                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4508                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4509                                       "blame");
4510                 }
4511                 if (defined $hash_base) {
4512                         print " | " .
4513                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4514                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4515                                       "history");
4516                 }
4517                 print " | " .
4518                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4519                                                file_name=>"$basedir$t->{'name'}")},
4520                                 "raw");
4521                 print "</td>\n";
4522
4523         } elsif ($t->{'type'} eq "tree") {
4524                 print "<td class=\"list\">";
4525                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4526                                              file_name=>"$basedir$t->{'name'}",
4527                                              %base_key)},
4528                               esc_path($t->{'name'}));
4529                 print "</td>\n";
4530                 print "<td class=\"link\">";
4531                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4532                                              file_name=>"$basedir$t->{'name'}",
4533                                              %base_key)},
4534                               "tree");
4535                 if (defined $hash_base) {
4536                         print " | " .
4537                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4538                                                      file_name=>"$basedir$t->{'name'}")},
4539                                       "history");
4540                 }
4541                 print "</td>\n";
4542         } else {
4543                 # unknown object: we can only present history for it
4544                 # (this includes 'commit' object, i.e. submodule support)
4545                 print "<td class=\"list\">" .
4546                       esc_path($t->{'name'}) .
4547                       "</td>\n";
4548                 print "<td class=\"link\">";
4549                 if (defined $hash_base) {
4550                         print $cgi->a({-href => href(action=>"history",
4551                                                      hash_base=>$hash_base,
4552                                                      file_name=>"$basedir$t->{'name'}")},
4553                                       "history");
4554                 }
4555                 print "</td>\n";
4556         }
4557 }
4558
4559 ## ......................................................................
4560 ## functions printing large fragments of HTML
4561
4562 # get pre-image filenames for merge (combined) diff
4563 sub fill_from_file_info {
4564         my ($diff, @parents) = @_;
4565
4566         $diff->{'from_file'} = [ ];
4567         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4568         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4569                 if ($diff->{'status'}[$i] eq 'R' ||
4570                     $diff->{'status'}[$i] eq 'C') {
4571                         $diff->{'from_file'}[$i] =
4572                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4573                 }
4574         }
4575
4576         return $diff;
4577 }
4578
4579 # is current raw difftree line of file deletion
4580 sub is_deleted {
4581         my $diffinfo = shift;
4582
4583         return $diffinfo->{'to_id'} eq ('0' x 40);
4584 }
4585
4586 # does patch correspond to [previous] difftree raw line
4587 # $diffinfo  - hashref of parsed raw diff format
4588 # $patchinfo - hashref of parsed patch diff format
4589 #              (the same keys as in $diffinfo)
4590 sub is_patch_split {
4591         my ($diffinfo, $patchinfo) = @_;
4592
4593         return defined $diffinfo && defined $patchinfo
4594                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4595 }
4596
4597
4598 sub git_difftree_body {
4599         my ($difftree, $hash, @parents) = @_;
4600         my ($parent) = $parents[0];
4601         my $have_blame = gitweb_check_feature('blame');
4602         print "<div class=\"list_head\">\n";
4603         if ($#{$difftree} > 10) {
4604                 print(($#{$difftree} + 1) . " files changed:\n");
4605         }
4606         print "</div>\n";
4607
4608         print "<table class=\"" .
4609               (@parents > 1 ? "combined " : "") .
4610               "diff_tree\">\n";
4611
4612         # header only for combined diff in 'commitdiff' view
4613         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4614         if ($has_header) {
4615                 # table header
4616                 print "<thead><tr>\n" .
4617                        "<th></th><th></th>\n"; # filename, patchN link
4618                 for (my $i = 0; $i < @parents; $i++) {
4619                         my $par = $parents[$i];
4620                         print "<th>" .
4621                               $cgi->a({-href => href(action=>"commitdiff",
4622                                                      hash=>$hash, hash_parent=>$par),
4623                                        -title => 'commitdiff to parent number ' .
4624                                                   ($i+1) . ': ' . substr($par,0,7)},
4625                                       $i+1) .
4626                               "&nbsp;</th>\n";
4627                 }
4628                 print "</tr></thead>\n<tbody>\n";
4629         }
4630
4631         my $alternate = 1;
4632         my $patchno = 0;
4633         foreach my $line (@{$difftree}) {
4634                 my $diff = parsed_difftree_line($line);
4635
4636                 if ($alternate) {
4637                         print "<tr class=\"dark\">\n";
4638                 } else {
4639                         print "<tr class=\"light\">\n";
4640                 }
4641                 $alternate ^= 1;
4642
4643                 if (exists $diff->{'nparents'}) { # combined diff
4644
4645                         fill_from_file_info($diff, @parents)
4646                                 unless exists $diff->{'from_file'};
4647
4648                         if (!is_deleted($diff)) {
4649                                 # file exists in the result (child) commit
4650                                 print "<td>" .
4651                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4652                                                              file_name=>$diff->{'to_file'},
4653                                                              hash_base=>$hash),
4654                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4655                                       "</td>\n";
4656                         } else {
4657                                 print "<td>" .
4658                                       esc_path($diff->{'to_file'}) .
4659                                       "</td>\n";
4660                         }
4661
4662                         if ($action eq 'commitdiff') {
4663                                 # link to patch
4664                                 $patchno++;
4665                                 print "<td class=\"link\">" .
4666                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4667                                               "patch") .
4668                                       " | " .
4669                                       "</td>\n";
4670                         }
4671
4672                         my $has_history = 0;
4673                         my $not_deleted = 0;
4674                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4675                                 my $hash_parent = $parents[$i];
4676                                 my $from_hash = $diff->{'from_id'}[$i];
4677                                 my $from_path = $diff->{'from_file'}[$i];
4678                                 my $status = $diff->{'status'}[$i];
4679
4680                                 $has_history ||= ($status ne 'A');
4681                                 $not_deleted ||= ($status ne 'D');
4682
4683                                 if ($status eq 'A') {
4684                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4685                                 } elsif ($status eq 'D') {
4686                                         print "<td class=\"link\">" .
4687                                               $cgi->a({-href => href(action=>"blob",
4688                                                                      hash_base=>$hash,
4689                                                                      hash=>$from_hash,
4690                                                                      file_name=>$from_path)},
4691                                                       "blob" . ($i+1)) .
4692                                               " | </td>\n";
4693                                 } else {
4694                                         if ($diff->{'to_id'} eq $from_hash) {
4695                                                 print "<td class=\"link nochange\">";
4696                                         } else {
4697                                                 print "<td class=\"link\">";
4698                                         }
4699                                         print $cgi->a({-href => href(action=>"blobdiff",
4700                                                                      hash=>$diff->{'to_id'},
4701                                                                      hash_parent=>$from_hash,
4702                                                                      hash_base=>$hash,
4703                                                                      hash_parent_base=>$hash_parent,
4704                                                                      file_name=>$diff->{'to_file'},
4705                                                                      file_parent=>$from_path)},
4706                                                       "diff" . ($i+1)) .
4707                                               " | </td>\n";
4708                                 }
4709                         }
4710
4711                         print "<td class=\"link\">";
4712                         if ($not_deleted) {
4713                                 print $cgi->a({-href => href(action=>"blob",
4714                                                              hash=>$diff->{'to_id'},
4715                                                              file_name=>$diff->{'to_file'},
4716                                                              hash_base=>$hash)},
4717                                               "blob");
4718                                 print " | " if ($has_history);
4719                         }
4720                         if ($has_history) {
4721                                 print $cgi->a({-href => href(action=>"history",
4722                                                              file_name=>$diff->{'to_file'},
4723                                                              hash_base=>$hash)},
4724                                               "history");
4725                         }
4726                         print "</td>\n";
4727
4728                         print "</tr>\n";
4729                         next; # instead of 'else' clause, to avoid extra indent
4730                 }
4731                 # else ordinary diff
4732
4733                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4734                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4735                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4736                         $to_mode_oct = oct $diff->{'to_mode'};
4737                         if (S_ISREG($to_mode_oct)) { # only for regular file
4738                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4739                         }
4740                         $to_file_type = file_type($diff->{'to_mode'});
4741                 }
4742                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4743                         $from_mode_oct = oct $diff->{'from_mode'};
4744                         if (S_ISREG($from_mode_oct)) { # only for regular file
4745                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4746                         }
4747                         $from_file_type = file_type($diff->{'from_mode'});
4748                 }
4749
4750                 if ($diff->{'status'} eq "A") { # created
4751                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4752                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4753                         $mode_chng   .= "]</span>";
4754                         print "<td>";
4755                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4756                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4757                                       -class => "list"}, esc_path($diff->{'file'}));
4758                         print "</td>\n";
4759                         print "<td>$mode_chng</td>\n";
4760                         print "<td class=\"link\">";
4761                         if ($action eq 'commitdiff') {
4762                                 # link to patch
4763                                 $patchno++;
4764                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4765                                               "patch") .
4766                                       " | ";
4767                         }
4768                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4769                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4770                                       "blob");
4771                         print "</td>\n";
4772
4773                 } elsif ($diff->{'status'} eq "D") { # deleted
4774                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4775                         print "<td>";
4776                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4777                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4778                                        -class => "list"}, esc_path($diff->{'file'}));
4779                         print "</td>\n";
4780                         print "<td>$mode_chng</td>\n";
4781                         print "<td class=\"link\">";
4782                         if ($action eq 'commitdiff') {
4783                                 # link to patch
4784                                 $patchno++;
4785                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4786                                               "patch") .
4787                                       " | ";
4788                         }
4789                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4790                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4791                                       "blob") . " | ";
4792                         if ($have_blame) {
4793                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4794                                                              file_name=>$diff->{'file'})},
4795                                               "blame") . " | ";
4796                         }
4797                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4798                                                      file_name=>$diff->{'file'})},
4799                                       "history");
4800                         print "</td>\n";
4801
4802                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4803                         my $mode_chnge = "";
4804                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4805                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4806                                 if ($from_file_type ne $to_file_type) {
4807                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4808                                 }
4809                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4810                                         if ($from_mode_str && $to_mode_str) {
4811                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4812                                         } elsif ($to_mode_str) {
4813                                                 $mode_chnge .= " mode: $to_mode_str";
4814                                         }
4815                                 }
4816                                 $mode_chnge .= "]</span>\n";
4817                         }
4818                         print "<td>";
4819                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4820                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4821                                       -class => "list"}, esc_path($diff->{'file'}));
4822                         print "</td>\n";
4823                         print "<td>$mode_chnge</td>\n";
4824                         print "<td class=\"link\">";
4825                         if ($action eq 'commitdiff') {
4826                                 # link to patch
4827                                 $patchno++;
4828                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4829                                               "patch") .
4830                                       " | ";
4831                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4832                                 # "commit" view and modified file (not onlu mode changed)
4833                                 print $cgi->a({-href => href(action=>"blobdiff",
4834                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4835                                                              hash_base=>$hash, hash_parent_base=>$parent,
4836                                                              file_name=>$diff->{'file'})},
4837                                               "diff") .
4838                                       " | ";
4839                         }
4840                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4841                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4842                                        "blob") . " | ";
4843                         if ($have_blame) {
4844                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4845                                                              file_name=>$diff->{'file'})},
4846                                               "blame") . " | ";
4847                         }
4848                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4849                                                      file_name=>$diff->{'file'})},
4850                                       "history");
4851                         print "</td>\n";
4852
4853                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4854                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4855                         my $nstatus = $status_name{$diff->{'status'}};
4856                         my $mode_chng = "";
4857                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4858                                 # mode also for directories, so we cannot use $to_mode_str
4859                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4860                         }
4861                         print "<td>" .
4862                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4863                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4864                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4865                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4866                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4867                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4868                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4869                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4870                               "<td class=\"link\">";
4871                         if ($action eq 'commitdiff') {
4872                                 # link to patch
4873                                 $patchno++;
4874                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4875                                               "patch") .
4876                                       " | ";
4877                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4878                                 # "commit" view and modified file (not only pure rename or copy)
4879                                 print $cgi->a({-href => href(action=>"blobdiff",
4880                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4881                                                              hash_base=>$hash, hash_parent_base=>$parent,
4882                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4883                                               "diff") .
4884                                       " | ";
4885                         }
4886                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4887                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4888                                       "blob") . " | ";
4889                         if ($have_blame) {
4890                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4891                                                              file_name=>$diff->{'to_file'})},
4892                                               "blame") . " | ";
4893                         }
4894                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4895                                                     file_name=>$diff->{'to_file'})},
4896                                       "history");
4897                         print "</td>\n";
4898
4899                 } # we should not encounter Unmerged (U) or Unknown (X) status
4900                 print "</tr>\n";
4901         }
4902         print "</tbody>" if $has_header;
4903         print "</table>\n";
4904 }
4905
4906 sub print_sidebyside_diff_chunk {
4907         my @chunk = @_;
4908         my (@ctx, @rem, @add);
4909
4910         return unless @chunk;
4911
4912         # incomplete last line might be among removed or added lines,
4913         # or both, or among context lines: find which
4914         for (my $i = 1; $i < @chunk; $i++) {
4915                 if ($chunk[$i][0] eq 'incomplete') {
4916                         $chunk[$i][0] = $chunk[$i-1][0];
4917                 }
4918         }
4919
4920         # guardian
4921         push @chunk, ["", ""];
4922
4923         foreach my $line_info (@chunk) {
4924                 my ($class, $line) = @$line_info;
4925
4926                 # print chunk headers
4927                 if ($class && $class eq 'chunk_header') {
4928                         print $line;
4929                         next;
4930                 }
4931
4932                 ## print from accumulator when type of class of lines change
4933                 # empty contents block on start rem/add block, or end of chunk
4934                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4935                         print join '',
4936                                 '<div class="chunk_block ctx">',
4937                                         '<div class="old">',
4938                                         @ctx,
4939                                         '</div>',
4940                                         '<div class="new">',
4941                                         @ctx,
4942                                         '</div>',
4943                                 '</div>';
4944                         @ctx = ();
4945                 }
4946                 # empty add/rem block on start context block, or end of chunk
4947                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4948                         if (!@add) {
4949                                 # pure removal
4950                                 print join '',
4951                                         '<div class="chunk_block rem">',
4952                                                 '<div class="old">',
4953                                                 @rem,
4954                                                 '</div>',
4955                                         '</div>';
4956                         } elsif (!@rem) {
4957                                 # pure addition
4958                                 print join '',
4959                                         '<div class="chunk_block add">',
4960                                                 '<div class="new">',
4961                                                 @add,
4962                                                 '</div>',
4963                                         '</div>';
4964                         } else {
4965                                 # assume that it is change
4966                                 print join '',
4967                                         '<div class="chunk_block chg">',
4968                                                 '<div class="old">',
4969                                                 @rem,
4970                                                 '</div>',
4971                                                 '<div class="new">',
4972                                                 @add,
4973                                                 '</div>',
4974                                         '</div>';
4975                         }
4976                         @rem = @add = ();
4977                 }
4978
4979                 ## adding lines to accumulator
4980                 # guardian value
4981                 last unless $line;
4982                 # rem, add or change
4983                 if ($class eq 'rem') {
4984                         push @rem, $line;
4985                 } elsif ($class eq 'add') {
4986                         push @add, $line;
4987                 }
4988                 # context line
4989                 if ($class eq 'ctx') {
4990                         push @ctx, $line;
4991                 }
4992         }
4993 }
4994
4995 sub git_patchset_body {
4996         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4997         my ($hash_parent) = $hash_parents[0];
4998
4999         my $is_combined = (@hash_parents > 1);
5000         my $patch_idx = 0;
5001         my $patch_number = 0;
5002         my $patch_line;
5003         my $diffinfo;
5004         my $to_name;
5005         my (%from, %to);
5006         my @chunk; # for side-by-side diff
5007
5008         print "<div class=\"patchset\">\n";
5009
5010         # skip to first patch
5011         while ($patch_line = <$fd>) {
5012                 chomp $patch_line;
5013
5014                 last if ($patch_line =~ m/^diff /);
5015         }
5016
5017  PATCH:
5018         while ($patch_line) {
5019
5020                 # parse "git diff" header line
5021                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5022                         # $1 is from_name, which we do not use
5023                         $to_name = unquote($2);
5024                         $to_name =~ s!^b/!!;
5025                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5026                         # $1 is 'cc' or 'combined', which we do not use
5027                         $to_name = unquote($2);
5028                 } else {
5029                         $to_name = undef;
5030                 }
5031
5032                 # check if current patch belong to current raw line
5033                 # and parse raw git-diff line if needed
5034                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5035                         # this is continuation of a split patch
5036                         print "<div class=\"patch cont\">\n";
5037                 } else {
5038                         # advance raw git-diff output if needed
5039                         $patch_idx++ if defined $diffinfo;
5040
5041                         # read and prepare patch information
5042                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5043
5044                         # compact combined diff output can have some patches skipped
5045                         # find which patch (using pathname of result) we are at now;
5046                         if ($is_combined) {
5047                                 while ($to_name ne $diffinfo->{'to_file'}) {
5048                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5049                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5050                                               "</div>\n";  # class="patch"
5051
5052                                         $patch_idx++;
5053                                         $patch_number++;
5054
5055                                         last if $patch_idx > $#$difftree;
5056                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5057                                 }
5058                         }
5059
5060                         # modifies %from, %to hashes
5061                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5062
5063                         # this is first patch for raw difftree line with $patch_idx index
5064                         # we index @$difftree array from 0, but number patches from 1
5065                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5066                 }
5067
5068                 # git diff header
5069                 #assert($patch_line =~ m/^diff /) if DEBUG;
5070                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5071                 $patch_number++;
5072                 # print "git diff" header
5073                 print format_git_diff_header_line($patch_line, $diffinfo,
5074                                                   \%from, \%to);
5075
5076                 # print extended diff header
5077                 print "<div class=\"diff extended_header\">\n";
5078         EXTENDED_HEADER:
5079                 while ($patch_line = <$fd>) {
5080                         chomp $patch_line;
5081
5082                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5083
5084                         print format_extended_diff_header_line($patch_line, $diffinfo,
5085                                                                \%from, \%to);
5086                 }
5087                 print "</div>\n"; # class="diff extended_header"
5088
5089                 # from-file/to-file diff header
5090                 if (! $patch_line) {
5091                         print "</div>\n"; # class="patch"
5092                         last PATCH;
5093                 }
5094                 next PATCH if ($patch_line =~ m/^diff /);
5095                 #assert($patch_line =~ m/^---/) if DEBUG;
5096
5097                 my $last_patch_line = $patch_line;
5098                 $patch_line = <$fd>;
5099                 chomp $patch_line;
5100                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5101
5102                 print format_diff_from_to_header($last_patch_line, $patch_line,
5103                                                  $diffinfo, \%from, \%to,
5104                                                  @hash_parents);
5105
5106                 # the patch itself
5107         LINE:
5108                 while ($patch_line = <$fd>) {
5109                         chomp $patch_line;
5110
5111                         next PATCH if ($patch_line =~ m/^diff /);
5112
5113                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5114                         my $diff_classes = "diff";
5115                         $diff_classes .= " $class" if ($class);
5116                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5117
5118                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5119                                 if ($class eq 'chunk_header') {
5120                                         print_sidebyside_diff_chunk(@chunk);
5121                                         @chunk = ( [ $class, $line ] );
5122                                 } else {
5123                                         push @chunk, [ $class, $line ];
5124                                 }
5125                         } else {
5126                                 # default 'inline' style and unknown styles
5127                                 print $line;
5128                         }
5129                 }
5130
5131         } continue {
5132                 if (@chunk) {
5133                         print_sidebyside_diff_chunk(@chunk);
5134                         @chunk = ();
5135                 }
5136                 print "</div>\n"; # class="patch"
5137         }
5138
5139         # for compact combined (--cc) format, with chunk and patch simplification
5140         # the patchset might be empty, but there might be unprocessed raw lines
5141         for (++$patch_idx if $patch_number > 0;
5142              $patch_idx < @$difftree;
5143              ++$patch_idx) {
5144                 # read and prepare patch information
5145                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5146
5147                 # generate anchor for "patch" links in difftree / whatchanged part
5148                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5149                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5150                       "</div>\n";  # class="patch"
5151
5152                 $patch_number++;
5153         }
5154
5155         if ($patch_number == 0) {
5156                 if (@hash_parents > 1) {
5157                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5158                 } else {
5159                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5160                 }
5161         }
5162
5163         print "</div>\n"; # class="patchset"
5164 }
5165
5166 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5167
5168 sub git_project_search_form {
5169         my ($searchtext, $search_use_regexp);
5170
5171         my $limit = '';
5172         if ($project_filter) {
5173                 $limit = " in '$project_filter/'";
5174         }
5175
5176         print "<div class=\"projsearch\">\n";
5177         print $cgi->startform(-method => 'get', -action => $my_uri) .
5178               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5179         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5180                 if (defined $project_filter);
5181         print $cgi->textfield(-name => 's', -value => $searchtext,
5182                               -title => "Search project by name and description$limit",
5183                               -size => 60) . "\n" .
5184               "<span title=\"Extended regular expression\">" .
5185               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5186                              -checked => $search_use_regexp) .
5187               "</span>\n" .
5188               $cgi->submit(-name => 'btnS', -value => 'Search') .
5189               $cgi->end_form() . "\n" .
5190               $cgi->a({-href => href(project => undef, searchtext => undef,
5191                                      project_filter => $project_filter)},
5192                       esc_html("List all projects$limit")) . "<br />\n";
5193         print "</div>\n";
5194 }
5195
5196 # entry for given @keys needs filling if at least one of keys in list
5197 # is not present in %$project_info
5198 sub project_info_needs_filling {
5199         my ($project_info, @keys) = @_;
5200
5201         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5202         foreach my $key (@keys) {
5203                 if (!exists $project_info->{$key}) {
5204                         return 1;
5205                 }
5206         }
5207         return;
5208 }
5209
5210 # fills project list info (age, description, owner, category, forks, etc.)
5211 # for each project in the list, removing invalid projects from
5212 # returned list, or fill only specified info.
5213 #
5214 # Invalid projects are removed from the returned list if and only if you
5215 # ask 'age' or 'age_string' to be filled, because they are the only fields
5216 # that run unconditionally git command that requires repository, and
5217 # therefore do always check if project repository is invalid.
5218 #
5219 # USAGE:
5220 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5221 #   ensures that 'descr_long' and 'ctags' fields are filled
5222 # * @project_list = fill_project_list_info(\@project_list)
5223 #   ensures that all fields are filled (and invalid projects removed)
5224 #
5225 # NOTE: modifies $projlist, but does not remove entries from it
5226 sub fill_project_list_info {
5227         my ($projlist, @wanted_keys) = @_;
5228         my @projects;
5229         my $filter_set = sub { return @_; };
5230         if (@wanted_keys) {
5231                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5232                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5233         }
5234
5235         my $show_ctags = gitweb_check_feature('ctags');
5236  PROJECT:
5237         foreach my $pr (@$projlist) {
5238                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5239                         my (@activity) = git_get_last_activity($pr->{'path'});
5240                         unless (@activity) {
5241                                 next PROJECT;
5242                         }
5243                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5244                 }
5245                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5246                         my $descr = git_get_project_description($pr->{'path'}) || "";
5247                         $descr = to_utf8($descr);
5248                         $pr->{'descr_long'} = $descr;
5249                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5250                 }
5251                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5252                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5253                 }
5254                 if ($show_ctags &&
5255                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5256                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5257                 }
5258                 if ($projects_list_group_categories &&
5259                     project_info_needs_filling($pr, $filter_set->('category'))) {
5260                         my $cat = git_get_project_category($pr->{'path'}) ||
5261                                                            $project_list_default_category;
5262                         $pr->{'category'} = to_utf8($cat);
5263                 }
5264
5265                 push @projects, $pr;
5266         }
5267
5268         return @projects;
5269 }
5270
5271 sub sort_projects_list {
5272         my ($projlist, $order) = @_;
5273         my @projects;
5274
5275         my %order_info = (
5276                 project => { key => 'path', type => 'str' },
5277                 descr => { key => 'descr_long', type => 'str' },
5278                 owner => { key => 'owner', type => 'str' },
5279                 age => { key => 'age', type => 'num' }
5280         );
5281         my $oi = $order_info{$order};
5282         return @$projlist unless defined $oi;
5283         if ($oi->{'type'} eq 'str') {
5284                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5285         } else {
5286                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5287         }
5288
5289         return @projects;
5290 }
5291
5292 # returns a hash of categories, containing the list of project
5293 # belonging to each category
5294 sub build_projlist_by_category {
5295         my ($projlist, $from, $to) = @_;
5296         my %categories;
5297
5298         $from = 0 unless defined $from;
5299         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5300
5301         for (my $i = $from; $i <= $to; $i++) {
5302                 my $pr = $projlist->[$i];
5303                 push @{$categories{ $pr->{'category'} }}, $pr;
5304         }
5305
5306         return wantarray ? %categories : \%categories;
5307 }
5308
5309 # print 'sort by' <th> element, generating 'sort by $name' replay link
5310 # if that order is not selected
5311 sub print_sort_th {
5312         print format_sort_th(@_);
5313 }
5314
5315 sub format_sort_th {
5316         my ($name, $order, $header) = @_;
5317         my $sort_th = "";
5318         $header ||= ucfirst($name);
5319
5320         if ($order eq $name) {
5321                 $sort_th .= "<th>$header</th>\n";
5322         } else {
5323                 $sort_th .= "<th>" .
5324                             $cgi->a({-href => href(-replay=>1, order=>$name),
5325                                      -class => "header"}, $header) .
5326                             "</th>\n";
5327         }
5328
5329         return $sort_th;
5330 }
5331
5332 sub git_project_list_rows {
5333         my ($projlist, $from, $to, $check_forks) = @_;
5334
5335         $from = 0 unless defined $from;
5336         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5337
5338         my $alternate = 1;
5339         for (my $i = $from; $i <= $to; $i++) {
5340                 my $pr = $projlist->[$i];
5341
5342                 if ($alternate) {
5343                         print "<tr class=\"dark\">\n";
5344                 } else {
5345                         print "<tr class=\"light\">\n";
5346                 }
5347                 $alternate ^= 1;
5348
5349                 if ($check_forks) {
5350                         print "<td>";
5351                         if ($pr->{'forks'}) {
5352                                 my $nforks = scalar @{$pr->{'forks'}};
5353                                 if ($nforks > 0) {
5354                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5355                                                        -title => "$nforks forks"}, "+");
5356                                 } else {
5357                                         print $cgi->span({-title => "$nforks forks"}, "+");
5358                                 }
5359                         }
5360                         print "</td>\n";
5361                 }
5362                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5363                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5364                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5365                                         -class => "list", -title => $pr->{'descr_long'}},
5366                                         esc_html($pr->{'descr'})) . "</td>\n" .
5367                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5368                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5369                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5370                       "<td class=\"link\">" .
5371                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5372                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5373                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5374                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5375                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5376                       "</td>\n" .
5377                       "</tr>\n";
5378         }
5379 }
5380
5381 sub git_project_list_body {
5382         # actually uses global variable $project
5383         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5384         my @projects = @$projlist;
5385
5386         my $check_forks = gitweb_check_feature('forks');
5387         my $show_ctags  = gitweb_check_feature('ctags');
5388         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5389         $check_forks = undef
5390                 if ($tagfilter || $searchtext);
5391
5392         # filtering out forks before filling info allows to do less work
5393         @projects = filter_forks_from_projects_list(\@projects)
5394                 if ($check_forks);
5395         # search_projects_list pre-fills required info
5396         @projects = search_projects_list(\@projects,
5397                                          'searchtext' => $searchtext,
5398                                          'tagfilter'  => $tagfilter)
5399                 if ($tagfilter || $searchtext);
5400         # fill the rest
5401         @projects = fill_project_list_info(\@projects);
5402
5403         $order ||= $default_projects_order;
5404         $from = 0 unless defined $from;
5405         $to = $#projects if (!defined $to || $#projects < $to);
5406
5407         # short circuit
5408         if ($from > $to) {
5409                 print "<center>\n".
5410                       "<b>No such projects found</b><br />\n".
5411                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5412                       "</center>\n<br />\n";
5413                 return;
5414         }
5415
5416         @projects = sort_projects_list(\@projects, $order);
5417
5418         if ($show_ctags) {
5419                 my $ctags = git_gather_all_ctags(\@projects);
5420                 my $cloud = git_populate_project_tagcloud($ctags);
5421                 print git_show_project_tagcloud($cloud, 64);
5422         }
5423
5424         print "<table class=\"project_list\">\n";
5425         unless ($no_header) {
5426                 print "<tr>\n";
5427                 if ($check_forks) {
5428                         print "<th></th>\n";
5429                 }
5430                 print_sort_th('project', $order, 'Project');
5431                 print_sort_th('descr', $order, 'Description');
5432                 print_sort_th('owner', $order, 'Owner');
5433                 print_sort_th('age', $order, 'Last Change');
5434                 print "<th></th>\n" . # for links
5435                       "</tr>\n";
5436         }
5437
5438         if ($projects_list_group_categories) {
5439                 # only display categories with projects in the $from-$to window
5440                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5441                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5442                 foreach my $cat (sort keys %categories) {
5443                         unless ($cat eq "") {
5444                                 print "<tr>\n";
5445                                 if ($check_forks) {
5446                                         print "<td></td>\n";
5447                                 }
5448                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5449                                 print "</tr>\n";
5450                         }
5451
5452                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5453                 }
5454         } else {
5455                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5456         }
5457
5458         if (defined $extra) {
5459                 print "<tr>\n";
5460                 if ($check_forks) {
5461                         print "<td></td>\n";
5462                 }
5463                 print "<td colspan=\"5\">$extra</td>\n" .
5464                       "</tr>\n";
5465         }
5466         print "</table>\n";
5467 }
5468
5469 sub git_log_body {
5470         # uses global variable $project
5471         my ($commitlist, $from, $to, $refs, $extra) = @_;
5472
5473         $from = 0 unless defined $from;
5474         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5475
5476         for (my $i = 0; $i <= $to; $i++) {
5477                 my %co = %{$commitlist->[$i]};
5478                 next if !%co;
5479                 my $commit = $co{'id'};
5480                 my $ref = format_ref_marker($refs, $commit);
5481                 git_print_header_div('commit',
5482                                "<span class=\"age\">$co{'age_string'}</span>" .
5483                                esc_html($co{'title'}) . $ref,
5484                                $commit);
5485                 print "<div class=\"title_text\">\n" .
5486                       "<div class=\"log_link\">\n" .
5487                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5488                       " | " .
5489                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5490                       " | " .
5491                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5492                       "<br/>\n" .
5493                       "</div>\n";
5494                       git_print_authorship(\%co, -tag => 'span');
5495                       print "<br/>\n</div>\n";
5496
5497                 print "<div class=\"log_body\">\n";
5498                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5499                 print "</div>\n";
5500         }
5501         if ($extra) {
5502                 print "<div class=\"page_nav\">\n";
5503                 print "$extra\n";
5504                 print "</div>\n";
5505         }
5506 }
5507
5508 sub git_shortlog_body {
5509         # uses global variable $project
5510         my ($commitlist, $from, $to, $refs, $extra) = @_;
5511
5512         $from = 0 unless defined $from;
5513         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5514
5515         print "<table class=\"shortlog\">\n";
5516         my $alternate = 1;
5517         for (my $i = $from; $i <= $to; $i++) {
5518                 my %co = %{$commitlist->[$i]};
5519                 my $commit = $co{'id'};
5520                 my $ref = format_ref_marker($refs, $commit);
5521                 if ($alternate) {
5522                         print "<tr class=\"dark\">\n";
5523                 } else {
5524                         print "<tr class=\"light\">\n";
5525                 }
5526                 $alternate ^= 1;
5527                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5528                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5529                       format_author_html('td', \%co, 10) . "<td>";
5530                 print format_subject_html($co{'title'}, $co{'title_short'},
5531                                           href(action=>"commit", hash=>$commit), $ref);
5532                 print "</td>\n" .
5533                       "<td class=\"link\">" .
5534                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5535                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5536                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5537                 my $snapshot_links = format_snapshot_links($commit);
5538                 if (defined $snapshot_links) {
5539                         print " | " . $snapshot_links;
5540                 }
5541                 print "</td>\n" .
5542                       "</tr>\n";
5543         }
5544         if (defined $extra) {
5545                 print "<tr>\n" .
5546                       "<td colspan=\"4\">$extra</td>\n" .
5547                       "</tr>\n";
5548         }
5549         print "</table>\n";
5550 }
5551
5552 sub git_history_body {
5553         # Warning: assumes constant type (blob or tree) during history
5554         my ($commitlist, $from, $to, $refs, $extra,
5555             $file_name, $file_hash, $ftype) = @_;
5556
5557         $from = 0 unless defined $from;
5558         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5559
5560         print "<table class=\"history\">\n";
5561         my $alternate = 1;
5562         for (my $i = $from; $i <= $to; $i++) {
5563                 my %co = %{$commitlist->[$i]};
5564                 if (!%co) {
5565                         next;
5566                 }
5567                 my $commit = $co{'id'};
5568
5569                 my $ref = format_ref_marker($refs, $commit);
5570
5571                 if ($alternate) {
5572                         print "<tr class=\"dark\">\n";
5573                 } else {
5574                         print "<tr class=\"light\">\n";
5575                 }
5576                 $alternate ^= 1;
5577                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5578         # shortlog:   format_author_html('td', \%co, 10)
5579                       format_author_html('td', \%co, 15, 3) . "<td>";
5580                 # originally git_history used chop_str($co{'title'}, 50)
5581                 print format_subject_html($co{'title'}, $co{'title_short'},
5582                                           href(action=>"commit", hash=>$commit), $ref);
5583                 print "</td>\n" .
5584                       "<td class=\"link\">" .
5585                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5586                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5587
5588                 if ($ftype eq 'blob') {
5589                         my $blob_current = $file_hash;
5590                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5591                         if (defined $blob_current && defined $blob_parent &&
5592                                         $blob_current ne $blob_parent) {
5593                                 print " | " .
5594                                         $cgi->a({-href => href(action=>"blobdiff",
5595                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5596                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5597                                                                file_name=>$file_name)},
5598                                                 "diff to current");
5599                         }
5600                 }
5601                 print "</td>\n" .
5602                       "</tr>\n";
5603         }
5604         if (defined $extra) {
5605                 print "<tr>\n" .
5606                       "<td colspan=\"4\">$extra</td>\n" .
5607                       "</tr>\n";
5608         }
5609         print "</table>\n";
5610 }
5611
5612 sub git_tags_body {
5613         # uses global variable $project
5614         my ($taglist, $from, $to, $extra) = @_;
5615         $from = 0 unless defined $from;
5616         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5617
5618         print "<table class=\"tags\">\n";
5619         my $alternate = 1;
5620         for (my $i = $from; $i <= $to; $i++) {
5621                 my $entry = $taglist->[$i];
5622                 my %tag = %$entry;
5623                 my $comment = $tag{'subject'};
5624                 my $comment_short;
5625                 if (defined $comment) {
5626                         $comment_short = chop_str($comment, 30, 5);
5627                 }
5628                 if ($alternate) {
5629                         print "<tr class=\"dark\">\n";
5630                 } else {
5631                         print "<tr class=\"light\">\n";
5632                 }
5633                 $alternate ^= 1;
5634                 if (defined $tag{'age'}) {
5635                         print "<td><i>$tag{'age'}</i></td>\n";
5636                 } else {
5637                         print "<td></td>\n";
5638                 }
5639                 print "<td>" .
5640                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5641                                -class => "list name"}, esc_html($tag{'name'})) .
5642                       "</td>\n" .
5643                       "<td>";
5644                 if (defined $comment) {
5645                         print format_subject_html($comment, $comment_short,
5646                                                   href(action=>"tag", hash=>$tag{'id'}));
5647                 }
5648                 print "</td>\n" .
5649                       "<td class=\"selflink\">";
5650                 if ($tag{'type'} eq "tag") {
5651                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5652                 } else {
5653                         print "&nbsp;";
5654                 }
5655                 print "</td>\n" .
5656                       "<td class=\"link\">" . " | " .
5657                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5658                 if ($tag{'reftype'} eq "commit") {
5659                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5660                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5661                 } elsif ($tag{'reftype'} eq "blob") {
5662                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5663                 }
5664                 print "</td>\n" .
5665                       "</tr>";
5666         }
5667         if (defined $extra) {
5668                 print "<tr>\n" .
5669                       "<td colspan=\"5\">$extra</td>\n" .
5670                       "</tr>\n";
5671         }
5672         print "</table>\n";
5673 }
5674
5675 sub git_heads_body {
5676         # uses global variable $project
5677         my ($headlist, $head_at, $from, $to, $extra) = @_;
5678         $from = 0 unless defined $from;
5679         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5680
5681         print "<table class=\"heads\">\n";
5682         my $alternate = 1;
5683         for (my $i = $from; $i <= $to; $i++) {
5684                 my $entry = $headlist->[$i];
5685                 my %ref = %$entry;
5686                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5687                 if ($alternate) {
5688                         print "<tr class=\"dark\">\n";
5689                 } else {
5690                         print "<tr class=\"light\">\n";
5691                 }
5692                 $alternate ^= 1;
5693                 print "<td><i>$ref{'age'}</i></td>\n" .
5694                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5695                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5696                                -class => "list name"},esc_html($ref{'name'})) .
5697                       "</td>\n" .
5698                       "<td class=\"link\">" .
5699                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5700                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5701                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5702                       "</td>\n" .
5703                       "</tr>";
5704         }
5705         if (defined $extra) {
5706                 print "<tr>\n" .
5707                       "<td colspan=\"3\">$extra</td>\n" .
5708                       "</tr>\n";
5709         }
5710         print "</table>\n";
5711 }
5712
5713 # Display a single remote block
5714 sub git_remote_block {
5715         my ($remote, $rdata, $limit, $head) = @_;
5716
5717         my $heads = $rdata->{'heads'};
5718         my $fetch = $rdata->{'fetch'};
5719         my $push = $rdata->{'push'};
5720
5721         my $urls_table = "<table class=\"projects_list\">\n" ;
5722
5723         if (defined $fetch) {
5724                 if ($fetch eq $push) {
5725                         $urls_table .= format_repo_url("URL", $fetch);
5726                 } else {
5727                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5728                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5729                 }
5730         } elsif (defined $push) {
5731                 $urls_table .= format_repo_url("Push URL", $push);
5732         } else {
5733                 $urls_table .= format_repo_url("", "No remote URL");
5734         }
5735
5736         $urls_table .= "</table>\n";
5737
5738         my $dots;
5739         if (defined $limit && $limit < @$heads) {
5740                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5741         }
5742
5743         print $urls_table;
5744         git_heads_body($heads, $head, 0, $limit, $dots);
5745 }
5746
5747 # Display a list of remote names with the respective fetch and push URLs
5748 sub git_remotes_list {
5749         my ($remotedata, $limit) = @_;
5750         print "<table class=\"heads\">\n";
5751         my $alternate = 1;
5752         my @remotes = sort keys %$remotedata;
5753
5754         my $limited = $limit && $limit < @remotes;
5755
5756         $#remotes = $limit - 1 if $limited;
5757
5758         while (my $remote = shift @remotes) {
5759                 my $rdata = $remotedata->{$remote};
5760                 my $fetch = $rdata->{'fetch'};
5761                 my $push = $rdata->{'push'};
5762                 if ($alternate) {
5763                         print "<tr class=\"dark\">\n";
5764                 } else {
5765                         print "<tr class=\"light\">\n";
5766                 }
5767                 $alternate ^= 1;
5768                 print "<td>" .
5769                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5770                                -class=> "list name"},esc_html($remote)) .
5771                       "</td>";
5772                 print "<td class=\"link\">" .
5773                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5774                       " | " .
5775                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5776                       "</td>";
5777
5778                 print "</tr>\n";
5779         }
5780
5781         if ($limited) {
5782                 print "<tr>\n" .
5783                       "<td colspan=\"3\">" .
5784                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5785                       "</td>\n" . "</tr>\n";
5786         }
5787
5788         print "</table>";
5789 }
5790
5791 # Display remote heads grouped by remote, unless there are too many
5792 # remotes, in which case we only display the remote names
5793 sub git_remotes_body {
5794         my ($remotedata, $limit, $head) = @_;
5795         if ($limit and $limit < keys %$remotedata) {
5796                 git_remotes_list($remotedata, $limit);
5797         } else {
5798                 fill_remote_heads($remotedata);
5799                 while (my ($remote, $rdata) = each %$remotedata) {
5800                         git_print_section({-class=>"remote", -id=>$remote},
5801                                 ["remotes", $remote, $remote], sub {
5802                                         git_remote_block($remote, $rdata, $limit, $head);
5803                                 });
5804                 }
5805         }
5806 }
5807
5808 sub git_search_message {
5809         my %co = @_;
5810
5811         my $greptype;
5812         if ($searchtype eq 'commit') {
5813                 $greptype = "--grep=";
5814         } elsif ($searchtype eq 'author') {
5815                 $greptype = "--author=";
5816         } elsif ($searchtype eq 'committer') {
5817                 $greptype = "--committer=";
5818         }
5819         $greptype .= $searchtext;
5820         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5821                                        $greptype, '--regexp-ignore-case',
5822                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5823
5824         my $paging_nav = '';
5825         if ($page > 0) {
5826                 $paging_nav .=
5827                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5828                                 "first") .
5829                         " &sdot; " .
5830                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5831                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5832         } else {
5833                 $paging_nav .= "first &sdot; prev";
5834         }
5835         my $next_link = '';
5836         if ($#commitlist >= 100) {
5837                 $next_link =
5838                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5839                                  -accesskey => "n", -title => "Alt-n"}, "next");
5840                 $paging_nav .= " &sdot; $next_link";
5841         } else {
5842                 $paging_nav .= " &sdot; next";
5843         }
5844
5845         git_header_html();
5846
5847         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5848         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5849         if ($page == 0 && !@commitlist) {
5850                 print "<p>No match.</p>\n";
5851         } else {
5852                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5853         }
5854
5855         git_footer_html();
5856 }
5857
5858 sub git_search_changes {
5859         my %co = @_;
5860
5861         local $/ = "\n";
5862         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5863                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5864                 ($search_use_regexp ? '--pickaxe-regex' : ())
5865                         or die_error(500, "Open git-log failed");
5866
5867         git_header_html();
5868
5869         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5870         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5871
5872         print "<table class=\"pickaxe search\">\n";
5873         my $alternate = 1;
5874         undef %co;
5875         my @files;
5876         while (my $line = <$fd>) {
5877                 chomp $line;
5878                 next unless $line;
5879
5880                 my %set = parse_difftree_raw_line($line);
5881                 if (defined $set{'commit'}) {
5882                         # finish previous commit
5883                         if (%co) {
5884                                 print "</td>\n" .
5885                                       "<td class=\"link\">" .
5886                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5887                                               "commit") .
5888                                       " | " .
5889                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5890                                                              hash_base=>$co{'id'})},
5891                                               "tree") .
5892                                       "</td>\n" .
5893                                       "</tr>\n";
5894                         }
5895
5896                         if ($alternate) {
5897                                 print "<tr class=\"dark\">\n";
5898                         } else {
5899                                 print "<tr class=\"light\">\n";
5900                         }
5901                         $alternate ^= 1;
5902                         %co = parse_commit($set{'commit'});
5903                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5904                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5905                               "<td><i>$author</i></td>\n" .
5906                               "<td>" .
5907                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5908                                       -class => "list subject"},
5909                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5910                 } elsif (defined $set{'to_id'}) {
5911                         next if ($set{'to_id'} =~ m/^0{40}$/);
5912
5913                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5914                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5915                                       -class => "list"},
5916                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5917                               "<br/>\n";
5918                 }
5919         }
5920         close $fd;
5921
5922         # finish last commit (warning: repetition!)
5923         if (%co) {
5924                 print "</td>\n" .
5925                       "<td class=\"link\">" .
5926                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5927                               "commit") .
5928                       " | " .
5929                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5930                                              hash_base=>$co{'id'})},
5931                               "tree") .
5932                       "</td>\n" .
5933                       "</tr>\n";
5934         }
5935
5936         print "</table>\n";
5937
5938         git_footer_html();
5939 }
5940
5941 sub git_search_files {
5942         my %co = @_;
5943
5944         local $/ = "\n";
5945         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5946                 $search_use_regexp ? ('-E', '-i') : '-F',
5947                 $searchtext, $co{'tree'}
5948                         or die_error(500, "Open git-grep failed");
5949
5950         git_header_html();
5951
5952         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5953         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5954
5955         print "<table class=\"grep_search\">\n";
5956         my $alternate = 1;
5957         my $matches = 0;
5958         my $lastfile = '';
5959         my $file_href;
5960         while (my $line = <$fd>) {
5961                 chomp $line;
5962                 my ($file, $lno, $ltext, $binary);
5963                 last if ($matches++ > 1000);
5964                 if ($line =~ /^Binary file (.+) matches$/) {
5965                         $file = $1;
5966                         $binary = 1;
5967                 } else {
5968                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5969                         $file =~ s/^$co{'tree'}://;
5970                 }
5971                 if ($file ne $lastfile) {
5972                         $lastfile and print "</td></tr>\n";
5973                         if ($alternate++) {
5974                                 print "<tr class=\"dark\">\n";
5975                         } else {
5976                                 print "<tr class=\"light\">\n";
5977                         }
5978                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5979                                           file_name=>$file);
5980                         print "<td class=\"list\">".
5981                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5982                         print "</td><td>\n";
5983                         $lastfile = $file;
5984                 }
5985                 if ($binary) {
5986                         print "<div class=\"binary\">Binary file</div>\n";
5987                 } else {
5988                         $ltext = untabify($ltext);
5989                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5990                                 $ltext = esc_html($1, -nbsp=>1);
5991                                 $ltext .= '<span class="match">';
5992                                 $ltext .= esc_html($2, -nbsp=>1);
5993                                 $ltext .= '</span>';
5994                                 $ltext .= esc_html($3, -nbsp=>1);
5995                         } else {
5996                                 $ltext = esc_html($ltext, -nbsp=>1);
5997                         }
5998                         print "<div class=\"pre\">" .
5999                                 $cgi->a({-href => $file_href.'#l'.$lno,
6000                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6001                                 ' ' .  $ltext . "</div>\n";
6002                 }
6003         }
6004         if ($lastfile) {
6005                 print "</td></tr>\n";
6006                 if ($matches > 1000) {
6007                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6008                 }
6009         } else {
6010                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6011         }
6012         close $fd;
6013
6014         print "</table>\n";
6015
6016         git_footer_html();
6017 }
6018
6019 sub git_search_grep_body {
6020         my ($commitlist, $from, $to, $extra) = @_;
6021         $from = 0 unless defined $from;
6022         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6023
6024         print "<table class=\"commit_search\">\n";
6025         my $alternate = 1;
6026         for (my $i = $from; $i <= $to; $i++) {
6027                 my %co = %{$commitlist->[$i]};
6028                 if (!%co) {
6029                         next;
6030                 }
6031                 my $commit = $co{'id'};
6032                 if ($alternate) {
6033                         print "<tr class=\"dark\">\n";
6034                 } else {
6035                         print "<tr class=\"light\">\n";
6036                 }
6037                 $alternate ^= 1;
6038                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6039                       format_author_html('td', \%co, 15, 5) .
6040                       "<td>" .
6041                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6042                                -class => "list subject"},
6043                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6044                 my $comment = $co{'comment'};
6045                 foreach my $line (@$comment) {
6046                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6047                                 my ($lead, $match, $trail) = ($1, $2, $3);
6048                                 $match = chop_str($match, 70, 5, 'center');
6049                                 my $contextlen = int((80 - length($match))/2);
6050                                 $contextlen = 30 if ($contextlen > 30);
6051                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6052                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6053
6054                                 $lead  = esc_html($lead);
6055                                 $match = esc_html($match);
6056                                 $trail = esc_html($trail);
6057
6058                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6059                         }
6060                 }
6061                 print "</td>\n" .
6062                       "<td class=\"link\">" .
6063                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6064                       " | " .
6065                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6066                       " | " .
6067                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6068                 print "</td>\n" .
6069                       "</tr>\n";
6070         }
6071         if (defined $extra) {
6072                 print "<tr>\n" .
6073                       "<td colspan=\"3\">$extra</td>\n" .
6074                       "</tr>\n";
6075         }
6076         print "</table>\n";
6077 }
6078
6079 ## ======================================================================
6080 ## ======================================================================
6081 ## actions
6082
6083 sub git_project_list {
6084         my $order = $input_params{'order'};
6085         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6086                 die_error(400, "Unknown order parameter");
6087         }
6088
6089         my @list = git_get_projects_list($project_filter, $strict_export);
6090         if (!@list) {
6091                 die_error(404, "No projects found");
6092         }
6093
6094         git_header_html();
6095         if (defined $home_text && -f $home_text) {
6096                 print "<div class=\"index_include\">\n";
6097                 insert_file($home_text);
6098                 print "</div>\n";
6099         }
6100
6101         git_project_search_form($searchtext, $search_use_regexp);
6102         git_project_list_body(\@list, $order);
6103         git_footer_html();
6104 }
6105
6106 sub git_forks {
6107         my $order = $input_params{'order'};
6108         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6109                 die_error(400, "Unknown order parameter");
6110         }
6111
6112         my $filter = $project;
6113         $filter =~ s/\.git$//;
6114         my @list = git_get_projects_list($filter);
6115         if (!@list) {
6116                 die_error(404, "No forks found");
6117         }
6118
6119         git_header_html();
6120         git_print_page_nav('','');
6121         git_print_header_div('summary', "$project forks");
6122         git_project_list_body(\@list, $order);
6123         git_footer_html();
6124 }
6125
6126 sub git_project_index {
6127         my @projects = git_get_projects_list($project_filter, $strict_export);
6128         if (!@projects) {
6129                 die_error(404, "No projects found");
6130         }
6131
6132         print $cgi->header(
6133                 -type => 'text/plain',
6134                 -charset => 'utf-8',
6135                 -content_disposition => 'inline; filename="index.aux"');
6136
6137         foreach my $pr (@projects) {
6138                 if (!exists $pr->{'owner'}) {
6139                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6140                 }
6141
6142                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6143                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6144                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6145                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6146                 $path  =~ s/ /\+/g;
6147                 $owner =~ s/ /\+/g;
6148
6149                 print "$path $owner\n";
6150         }
6151 }
6152
6153 sub git_summary {
6154         my $descr = git_get_project_description($project) || "none";
6155         my %co = parse_commit("HEAD");
6156         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6157         my $head = $co{'id'};
6158         my $remote_heads = gitweb_check_feature('remote_heads');
6159
6160         my $owner = git_get_project_owner($project);
6161
6162         my $refs = git_get_references();
6163         # These get_*_list functions return one more to allow us to see if
6164         # there are more ...
6165         my @taglist  = git_get_tags_list(16);
6166         my @headlist = git_get_heads_list(16);
6167         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6168         my @forklist;
6169         my $check_forks = gitweb_check_feature('forks');
6170
6171         if ($check_forks) {
6172                 # find forks of a project
6173                 my $filter = $project;
6174                 $filter =~ s/\.git$//;
6175                 @forklist = git_get_projects_list($filter);
6176                 # filter out forks of forks
6177                 @forklist = filter_forks_from_projects_list(\@forklist)
6178                         if (@forklist);
6179         }
6180
6181         git_header_html();
6182         git_print_page_nav('summary','', $head);
6183
6184         print "<div class=\"title\">&nbsp;</div>\n";
6185         print "<table class=\"projects_list\">\n" .
6186               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6187               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6188         if (defined $cd{'rfc2822'}) {
6189                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6190                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6191         }
6192
6193         # use per project git URL list in $projectroot/$project/cloneurl
6194         # or make project git URL from git base URL and project name
6195         my $url_tag = "URL";
6196         my @url_list = git_get_project_url_list($project);
6197         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6198         foreach my $git_url (@url_list) {
6199                 next unless $git_url;
6200                 print format_repo_url($url_tag, $git_url);
6201                 $url_tag = "";
6202         }
6203
6204         # Tag cloud
6205         my $show_ctags = gitweb_check_feature('ctags');
6206         if ($show_ctags) {
6207                 my $ctags = git_get_project_ctags($project);
6208                 if (%$ctags) {
6209                         # without ability to add tags, don't show if there are none
6210                         my $cloud = git_populate_project_tagcloud($ctags);
6211                         print "<tr id=\"metadata_ctags\">" .
6212                               "<td>content tags</td>" .
6213                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6214                               "</tr>\n";
6215                 }
6216         }
6217
6218         print "</table>\n";
6219
6220         # If XSS prevention is on, we don't include README.html.
6221         # TODO: Allow a readme in some safe format.
6222         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6223                 print "<div class=\"title\">readme</div>\n" .
6224                       "<div class=\"readme\">\n";
6225                 insert_file("$projectroot/$project/README.html");
6226                 print "\n</div>\n"; # class="readme"
6227         }
6228
6229         # we need to request one more than 16 (0..15) to check if
6230         # those 16 are all
6231         my @commitlist = $head ? parse_commits($head, 17) : ();
6232         if (@commitlist) {
6233                 git_print_header_div('shortlog');
6234                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6235                                   $#commitlist <=  15 ? undef :
6236                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6237         }
6238
6239         if (@taglist) {
6240                 git_print_header_div('tags');
6241                 git_tags_body(\@taglist, 0, 15,
6242                               $#taglist <=  15 ? undef :
6243                               $cgi->a({-href => href(action=>"tags")}, "..."));
6244         }
6245
6246         if (@headlist) {
6247                 git_print_header_div('heads');
6248                 git_heads_body(\@headlist, $head, 0, 15,
6249                                $#headlist <= 15 ? undef :
6250                                $cgi->a({-href => href(action=>"heads")}, "..."));
6251         }
6252
6253         if (%remotedata) {
6254                 git_print_header_div('remotes');
6255                 git_remotes_body(\%remotedata, 15, $head);
6256         }
6257
6258         if (@forklist) {
6259                 git_print_header_div('forks');
6260                 git_project_list_body(\@forklist, 'age', 0, 15,
6261                                       $#forklist <= 15 ? undef :
6262                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6263                                       'no_header');
6264         }
6265
6266         git_footer_html();
6267 }
6268
6269 sub git_tag {
6270         my %tag = parse_tag($hash);
6271
6272         if (! %tag) {
6273                 die_error(404, "Unknown tag object");
6274         }
6275
6276         my $head = git_get_head_hash($project);
6277         git_header_html();
6278         git_print_page_nav('','', $head,undef,$head);
6279         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6280         print "<div class=\"title_text\">\n" .
6281               "<table class=\"object_header\">\n" .
6282               "<tr>\n" .
6283               "<td>object</td>\n" .
6284               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6285                                $tag{'object'}) . "</td>\n" .
6286               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6287                                               $tag{'type'}) . "</td>\n" .
6288               "</tr>\n";
6289         if (defined($tag{'author'})) {
6290                 git_print_authorship_rows(\%tag, 'author');
6291         }
6292         print "</table>\n\n" .
6293               "</div>\n";
6294         print "<div class=\"page_body\">";
6295         my $comment = $tag{'comment'};
6296         foreach my $line (@$comment) {
6297                 chomp $line;
6298                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6299         }
6300         print "</div>\n";
6301         git_footer_html();
6302 }
6303
6304 sub git_blame_common {
6305         my $format = shift || 'porcelain';
6306         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6307                 $format = 'incremental';
6308                 $action = 'blame_incremental'; # for page title etc
6309         }
6310
6311         # permissions
6312         gitweb_check_feature('blame')
6313                 or die_error(403, "Blame view not allowed");
6314
6315         # error checking
6316         die_error(400, "No file name given") unless $file_name;
6317         $hash_base ||= git_get_head_hash($project);
6318         die_error(404, "Couldn't find base commit") unless $hash_base;
6319         my %co = parse_commit($hash_base)
6320                 or die_error(404, "Commit not found");
6321         my $ftype = "blob";
6322         if (!defined $hash) {
6323                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6324                         or die_error(404, "Error looking up file");
6325         } else {
6326                 $ftype = git_get_type($hash);
6327                 if ($ftype !~ "blob") {
6328                         die_error(400, "Object is not a blob");
6329                 }
6330         }
6331
6332         my $fd;
6333         if ($format eq 'incremental') {
6334                 # get file contents (as base)
6335                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6336                         or die_error(500, "Open git-cat-file failed");
6337         } elsif ($format eq 'data') {
6338                 # run git-blame --incremental
6339                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6340                         $hash_base, "--", $file_name
6341                         or die_error(500, "Open git-blame --incremental failed");
6342         } else {
6343                 # run git-blame --porcelain
6344                 open $fd, "-|", git_cmd(), "blame", '-p',
6345                         $hash_base, '--', $file_name
6346                         or die_error(500, "Open git-blame --porcelain failed");
6347         }
6348
6349         # incremental blame data returns early
6350         if ($format eq 'data') {
6351                 print $cgi->header(
6352                         -type=>"text/plain", -charset => "utf-8",
6353                         -status=> "200 OK");
6354                 local $| = 1; # output autoflush
6355                 while (my $line = <$fd>) {
6356                         print to_utf8($line);
6357                 }
6358                 close $fd
6359                         or print "ERROR $!\n";
6360
6361                 print 'END';
6362                 if (defined $t0 && gitweb_check_feature('timed')) {
6363                         print ' '.
6364                               tv_interval($t0, [ gettimeofday() ]).
6365                               ' '.$number_of_git_cmds;
6366                 }
6367                 print "\n";
6368
6369                 return;
6370         }
6371
6372         # page header
6373         git_header_html();
6374         my $formats_nav =
6375                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6376                         "blob") .
6377                 " | ";
6378         if ($format eq 'incremental') {
6379                 $formats_nav .=
6380                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6381                                 "blame") . " (non-incremental)";
6382         } else {
6383                 $formats_nav .=
6384                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6385                                 "blame") . " (incremental)";
6386         }
6387         $formats_nav .=
6388                 " | " .
6389                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6390                         "history") .
6391                 " | " .
6392                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6393                         "HEAD");
6394         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6395         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6396         git_print_page_path($file_name, $ftype, $hash_base);
6397
6398         # page body
6399         if ($format eq 'incremental') {
6400                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6401                       "This page requires JavaScript to run.\n Use ".
6402                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6403                               'this page').
6404                       " instead.\n".
6405                       "</b></center></div>\n</noscript>\n";
6406
6407                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6408         }
6409
6410         print qq!<div class="page_body">\n!;
6411         print qq!<div id="progress_info">... / ...</div>\n!
6412                 if ($format eq 'incremental');
6413         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6414               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6415               qq!<thead>\n!.
6416               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6417               qq!</thead>\n!.
6418               qq!<tbody>\n!;
6419
6420         my @rev_color = qw(light dark);
6421         my $num_colors = scalar(@rev_color);
6422         my $current_color = 0;
6423
6424         if ($format eq 'incremental') {
6425                 my $color_class = $rev_color[$current_color];
6426
6427                 #contents of a file
6428                 my $linenr = 0;
6429         LINE:
6430                 while (my $line = <$fd>) {
6431                         chomp $line;
6432                         $linenr++;
6433
6434                         print qq!<tr id="l$linenr" class="$color_class">!.
6435                               qq!<td class="sha1"><a href=""> </a></td>!.
6436                               qq!<td class="linenr">!.
6437                               qq!<a class="linenr" href="">$linenr</a></td>!;
6438                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6439                         print qq!</tr>\n!;
6440                 }
6441
6442         } else { # porcelain, i.e. ordinary blame
6443                 my %metainfo = (); # saves information about commits
6444
6445                 # blame data
6446         LINE:
6447                 while (my $line = <$fd>) {
6448                         chomp $line;
6449                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6450                         # no <lines in group> for subsequent lines in group of lines
6451                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6452                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6453                         if (!exists $metainfo{$full_rev}) {
6454                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6455                         }
6456                         my $meta = $metainfo{$full_rev};
6457                         my $data;
6458                         while ($data = <$fd>) {
6459                                 chomp $data;
6460                                 last if ($data =~ s/^\t//); # contents of line
6461                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6462                                         $meta->{$1} = $2 unless exists $meta->{$1};
6463                                 }
6464                                 if ($data =~ /^previous /) {
6465                                         $meta->{'nprevious'}++;
6466                                 }
6467                         }
6468                         my $short_rev = substr($full_rev, 0, 8);
6469                         my $author = $meta->{'author'};
6470                         my %date =
6471                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6472                         my $date = $date{'iso-tz'};
6473                         if ($group_size) {
6474                                 $current_color = ($current_color + 1) % $num_colors;
6475                         }
6476                         my $tr_class = $rev_color[$current_color];
6477                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6478                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6479                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6480                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6481                         if ($group_size) {
6482                                 print "<td class=\"sha1\"";
6483                                 print " title=\"". esc_html($author) . ", $date\"";
6484                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6485                                 print ">";
6486                                 print $cgi->a({-href => href(action=>"commit",
6487                                                              hash=>$full_rev,
6488                                                              file_name=>$file_name)},
6489                                               esc_html($short_rev));
6490                                 if ($group_size >= 2) {
6491                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6492                                         if (@author_initials) {
6493                                                 print "<br />" .
6494                                                       esc_html(join('', @author_initials));
6495                                                 #           or join('.', ...)
6496                                         }
6497                                 }
6498                                 print "</td>\n";
6499                         }
6500                         # 'previous' <sha1 of parent commit> <filename at commit>
6501                         if (exists $meta->{'previous'} &&
6502                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6503                                 $meta->{'parent'} = $1;
6504                                 $meta->{'file_parent'} = unquote($2);
6505                         }
6506                         my $linenr_commit =
6507                                 exists($meta->{'parent'}) ?
6508                                 $meta->{'parent'} : $full_rev;
6509                         my $linenr_filename =
6510                                 exists($meta->{'file_parent'}) ?
6511                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6512                         my $blamed = href(action => 'blame',
6513                                           file_name => $linenr_filename,
6514                                           hash_base => $linenr_commit);
6515                         print "<td class=\"linenr\">";
6516                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6517                                         -class => "linenr" },
6518                                       esc_html($lineno));
6519                         print "</td>";
6520                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6521                         print "</tr>\n";
6522                 } # end while
6523
6524         }
6525
6526         # footer
6527         print "</tbody>\n".
6528               "</table>\n"; # class="blame"
6529         print "</div>\n";   # class="blame_body"
6530         close $fd
6531                 or print "Reading blob failed\n";
6532
6533         git_footer_html();
6534 }
6535
6536 sub git_blame {
6537         git_blame_common();
6538 }
6539
6540 sub git_blame_incremental {
6541         git_blame_common('incremental');
6542 }
6543
6544 sub git_blame_data {
6545         git_blame_common('data');
6546 }
6547
6548 sub git_tags {
6549         my $head = git_get_head_hash($project);
6550         git_header_html();
6551         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6552         git_print_header_div('summary', $project);
6553
6554         my @tagslist = git_get_tags_list();
6555         if (@tagslist) {
6556                 git_tags_body(\@tagslist);
6557         }
6558         git_footer_html();
6559 }
6560
6561 sub git_heads {
6562         my $head = git_get_head_hash($project);
6563         git_header_html();
6564         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6565         git_print_header_div('summary', $project);
6566
6567         my @headslist = git_get_heads_list();
6568         if (@headslist) {
6569                 git_heads_body(\@headslist, $head);
6570         }
6571         git_footer_html();
6572 }
6573
6574 # used both for single remote view and for list of all the remotes
6575 sub git_remotes {
6576         gitweb_check_feature('remote_heads')
6577                 or die_error(403, "Remote heads view is disabled");
6578
6579         my $head = git_get_head_hash($project);
6580         my $remote = $input_params{'hash'};
6581
6582         my $remotedata = git_get_remotes_list($remote);
6583         die_error(500, "Unable to get remote information") unless defined $remotedata;
6584
6585         unless (%$remotedata) {
6586                 die_error(404, defined $remote ?
6587                         "Remote $remote not found" :
6588                         "No remotes found");
6589         }
6590
6591         git_header_html(undef, undef, -action_extra => $remote);
6592         git_print_page_nav('', '',  $head, undef, $head,
6593                 format_ref_views($remote ? '' : 'remotes'));
6594
6595         fill_remote_heads($remotedata);
6596         if (defined $remote) {
6597                 git_print_header_div('remotes', "$remote remote for $project");
6598                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6599         } else {
6600                 git_print_header_div('summary', "$project remotes");
6601                 git_remotes_body($remotedata, undef, $head);
6602         }
6603
6604         git_footer_html();
6605 }
6606
6607 sub git_blob_plain {
6608         my $type = shift;
6609         my $expires;
6610
6611         if (!defined $hash) {
6612                 if (defined $file_name) {
6613                         my $base = $hash_base || git_get_head_hash($project);
6614                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6615                                 or die_error(404, "Cannot find file");
6616                 } else {
6617                         die_error(400, "No file name defined");
6618                 }
6619         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6620                 # blobs defined by non-textual hash id's can be cached
6621                 $expires = "+1d";
6622         }
6623
6624         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6625                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6626
6627         # content-type (can include charset)
6628         $type = blob_contenttype($fd, $file_name, $type);
6629
6630         # "save as" filename, even when no $file_name is given
6631         my $save_as = "$hash";
6632         if (defined $file_name) {
6633                 $save_as = $file_name;
6634         } elsif ($type =~ m/^text\//) {
6635                 $save_as .= '.txt';
6636         }
6637
6638         # With XSS prevention on, blobs of all types except a few known safe
6639         # ones are served with "Content-Disposition: attachment" to make sure
6640         # they don't run in our security domain.  For certain image types,
6641         # blob view writes an <img> tag referring to blob_plain view, and we
6642         # want to be sure not to break that by serving the image as an
6643         # attachment (though Firefox 3 doesn't seem to care).
6644         my $sandbox = $prevent_xss &&
6645                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6646
6647         # serve text/* as text/plain
6648         if ($prevent_xss &&
6649             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6650              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6651                 my $rest = $1;
6652                 $rest = defined $rest ? $rest : '';
6653                 $type = "text/plain$rest";
6654         }
6655
6656         print $cgi->header(
6657                 -type => $type,
6658                 -expires => $expires,
6659                 -content_disposition =>
6660                         ($sandbox ? 'attachment' : 'inline')
6661                         . '; filename="' . $save_as . '"');
6662         local $/ = undef;
6663         binmode STDOUT, ':raw';
6664         print <$fd>;
6665         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6666         close $fd;
6667 }
6668
6669 sub git_blob {
6670         my $expires;
6671
6672         if (!defined $hash) {
6673                 if (defined $file_name) {
6674                         my $base = $hash_base || git_get_head_hash($project);
6675                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6676                                 or die_error(404, "Cannot find file");
6677                 } else {
6678                         die_error(400, "No file name defined");
6679                 }
6680         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6681                 # blobs defined by non-textual hash id's can be cached
6682                 $expires = "+1d";
6683         }
6684
6685         my $have_blame = gitweb_check_feature('blame');
6686         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6687                 or die_error(500, "Couldn't cat $file_name, $hash");
6688         my $mimetype = blob_mimetype($fd, $file_name);
6689         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6690         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6691                 close $fd;
6692                 return git_blob_plain($mimetype);
6693         }
6694         # we can have blame only for text/* mimetype
6695         $have_blame &&= ($mimetype =~ m!^text/!);
6696
6697         my $highlight = gitweb_check_feature('highlight');
6698         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6699         $fd = run_highlighter($fd, $highlight, $syntax)
6700                 if $syntax;
6701
6702         git_header_html(undef, $expires);
6703         my $formats_nav = '';
6704         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6705                 if (defined $file_name) {
6706                         if ($have_blame) {
6707                                 $formats_nav .=
6708                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6709                                                 "blame") .
6710                                         " | ";
6711                         }
6712                         $formats_nav .=
6713                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6714                                         "history") .
6715                                 " | " .
6716                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6717                                         "raw") .
6718                                 " | " .
6719                                 $cgi->a({-href => href(action=>"blob",
6720                                                        hash_base=>"HEAD", file_name=>$file_name)},
6721                                         "HEAD");
6722                 } else {
6723                         $formats_nav .=
6724                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6725                                         "raw");
6726                 }
6727                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6728                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6729         } else {
6730                 print "<div class=\"page_nav\">\n" .
6731                       "<br/><br/></div>\n" .
6732                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6733         }
6734         git_print_page_path($file_name, "blob", $hash_base);
6735         print "<div class=\"page_body\">\n";
6736         if ($mimetype =~ m!^image/!) {
6737                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6738                 if ($file_name) {
6739                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6740                 }
6741                 print qq! src="! .
6742                       href(action=>"blob_plain", hash=>$hash,
6743                            hash_base=>$hash_base, file_name=>$file_name) .
6744                       qq!" />\n!;
6745         } else {
6746                 my $nr;
6747                 while (my $line = <$fd>) {
6748                         chomp $line;
6749                         $nr++;
6750                         $line = untabify($line);
6751                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6752                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6753                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6754                 }
6755         }
6756         close $fd
6757                 or print "Reading blob failed.\n";
6758         print "</div>";
6759         git_footer_html();
6760 }
6761
6762 sub git_tree {
6763         if (!defined $hash_base) {
6764                 $hash_base = "HEAD";
6765         }
6766         if (!defined $hash) {
6767                 if (defined $file_name) {
6768                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6769                 } else {
6770                         $hash = $hash_base;
6771                 }
6772         }
6773         die_error(404, "No such tree") unless defined($hash);
6774
6775         my $show_sizes = gitweb_check_feature('show-sizes');
6776         my $have_blame = gitweb_check_feature('blame');
6777
6778         my @entries = ();
6779         {
6780                 local $/ = "\0";
6781                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6782                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6783                         or die_error(500, "Open git-ls-tree failed");
6784                 @entries = map { chomp; $_ } <$fd>;
6785                 close $fd
6786                         or die_error(404, "Reading tree failed");
6787         }
6788
6789         my $refs = git_get_references();
6790         my $ref = format_ref_marker($refs, $hash_base);
6791         git_header_html();
6792         my $basedir = '';
6793         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6794                 my @views_nav = ();
6795                 if (defined $file_name) {
6796                         push @views_nav,
6797                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6798                                         "history"),
6799                                 $cgi->a({-href => href(action=>"tree",
6800                                                        hash_base=>"HEAD", file_name=>$file_name)},
6801                                         "HEAD"),
6802                 }
6803                 my $snapshot_links = format_snapshot_links($hash);
6804                 if (defined $snapshot_links) {
6805                         # FIXME: Should be available when we have no hash base as well.
6806                         push @views_nav, $snapshot_links;
6807                 }
6808                 git_print_page_nav('tree','', $hash_base, undef, undef,
6809                                    join(' | ', @views_nav));
6810                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6811         } else {
6812                 undef $hash_base;
6813                 print "<div class=\"page_nav\">\n";
6814                 print "<br/><br/></div>\n";
6815                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6816         }
6817         if (defined $file_name) {
6818                 $basedir = $file_name;
6819                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6820                         $basedir .= '/';
6821                 }
6822                 git_print_page_path($file_name, 'tree', $hash_base);
6823         }
6824         print "<div class=\"page_body\">\n";
6825         print "<table class=\"tree\">\n";
6826         my $alternate = 1;
6827         # '..' (top directory) link if possible
6828         if (defined $hash_base &&
6829             defined $file_name && $file_name =~ m![^/]+$!) {
6830                 if ($alternate) {
6831                         print "<tr class=\"dark\">\n";
6832                 } else {
6833                         print "<tr class=\"light\">\n";
6834                 }
6835                 $alternate ^= 1;
6836
6837                 my $up = $file_name;
6838                 $up =~ s!/?[^/]+$!!;
6839                 undef $up unless $up;
6840                 # based on git_print_tree_entry
6841                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6842                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6843                 print '<td class="list">';
6844                 print $cgi->a({-href => href(action=>"tree",
6845                                              hash_base=>$hash_base,
6846                                              file_name=>$up)},
6847                               "..");
6848                 print "</td>\n";
6849                 print "<td class=\"link\"></td>\n";
6850
6851                 print "</tr>\n";
6852         }
6853         foreach my $line (@entries) {
6854                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6855
6856                 if ($alternate) {
6857                         print "<tr class=\"dark\">\n";
6858                 } else {
6859                         print "<tr class=\"light\">\n";
6860                 }
6861                 $alternate ^= 1;
6862
6863                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6864
6865                 print "</tr>\n";
6866         }
6867         print "</table>\n" .
6868               "</div>";
6869         git_footer_html();
6870 }
6871
6872 sub snapshot_name {
6873         my ($project, $hash) = @_;
6874
6875         # path/to/project.git  -> project
6876         # path/to/project/.git -> project
6877         my $name = to_utf8($project);
6878         $name =~ s,([^/])/*\.git$,$1,;
6879         $name = basename($name);
6880         # sanitize name
6881         $name =~ s/[[:cntrl:]]/?/g;
6882
6883         my $ver = $hash;
6884         if ($hash =~ /^[0-9a-fA-F]+$/) {
6885                 # shorten SHA-1 hash
6886                 my $full_hash = git_get_full_hash($project, $hash);
6887                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6888                         $ver = git_get_short_hash($project, $hash);
6889                 }
6890         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6891                 # tags don't need shortened SHA-1 hash
6892                 $ver = $1;
6893         } else {
6894                 # branches and other need shortened SHA-1 hash
6895                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6896                         $ver = $1;
6897                 }
6898                 $ver .= '-' . git_get_short_hash($project, $hash);
6899         }
6900         # in case of hierarchical branch names
6901         $ver =~ s!/!.!g;
6902
6903         # name = project-version_string
6904         $name = "$name-$ver";
6905
6906         return wantarray ? ($name, $name) : $name;
6907 }
6908
6909 sub git_snapshot {
6910         my $format = $input_params{'snapshot_format'};
6911         if (!@snapshot_fmts) {
6912                 die_error(403, "Snapshots not allowed");
6913         }
6914         # default to first supported snapshot format
6915         $format ||= $snapshot_fmts[0];
6916         if ($format !~ m/^[a-z0-9]+$/) {
6917                 die_error(400, "Invalid snapshot format parameter");
6918         } elsif (!exists($known_snapshot_formats{$format})) {
6919                 die_error(400, "Unknown snapshot format");
6920         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6921                 die_error(403, "Snapshot format not allowed");
6922         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6923                 die_error(403, "Unsupported snapshot format");
6924         }
6925
6926         my $type = git_get_type("$hash^{}");
6927         if (!$type) {
6928                 die_error(404, 'Object does not exist');
6929         }  elsif ($type eq 'blob') {
6930                 die_error(400, 'Object is not a tree-ish');
6931         }
6932
6933         my ($name, $prefix) = snapshot_name($project, $hash);
6934         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6935         my $cmd = quote_command(
6936                 git_cmd(), 'archive',
6937                 "--format=$known_snapshot_formats{$format}{'format'}",
6938                 "--prefix=$prefix/", $hash);
6939         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6940                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6941         }
6942
6943         $filename =~ s/(["\\])/\\$1/g;
6944         print $cgi->header(
6945                 -type => $known_snapshot_formats{$format}{'type'},
6946                 -content_disposition => 'inline; filename="' . $filename . '"',
6947                 -status => '200 OK');
6948
6949         open my $fd, "-|", $cmd
6950                 or die_error(500, "Execute git-archive failed");
6951         binmode STDOUT, ':raw';
6952         print <$fd>;
6953         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6954         close $fd;
6955 }
6956
6957 sub git_log_generic {
6958         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6959
6960         my $head = git_get_head_hash($project);
6961         if (!defined $base) {
6962                 $base = $head;
6963         }
6964         if (!defined $page) {
6965                 $page = 0;
6966         }
6967         my $refs = git_get_references();
6968
6969         my $commit_hash = $base;
6970         if (defined $parent) {
6971                 $commit_hash = "$parent..$base";
6972         }
6973         my @commitlist =
6974                 parse_commits($commit_hash, 101, (100 * $page),
6975                               defined $file_name ? ($file_name, "--full-history") : ());
6976
6977         my $ftype;
6978         if (!defined $file_hash && defined $file_name) {
6979                 # some commits could have deleted file in question,
6980                 # and not have it in tree, but one of them has to have it
6981                 for (my $i = 0; $i < @commitlist; $i++) {
6982                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6983                         last if defined $file_hash;
6984                 }
6985         }
6986         if (defined $file_hash) {
6987                 $ftype = git_get_type($file_hash);
6988         }
6989         if (defined $file_name && !defined $ftype) {
6990                 die_error(500, "Unknown type of object");
6991         }
6992         my %co;
6993         if (defined $file_name) {
6994                 %co = parse_commit($base)
6995                         or die_error(404, "Unknown commit object");
6996         }
6997
6998
6999         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7000         my $next_link = '';
7001         if ($#commitlist >= 100) {
7002                 $next_link =
7003                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7004                                  -accesskey => "n", -title => "Alt-n"}, "next");
7005         }
7006         my $patch_max = gitweb_get_feature('patches');
7007         if ($patch_max && !defined $file_name) {
7008                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7009                         $paging_nav .= " &sdot; " .
7010                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7011                                         "patches");
7012                 }
7013         }
7014
7015         git_header_html();
7016         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7017         if (defined $file_name) {
7018                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7019         } else {
7020                 git_print_header_div('summary', $project)
7021         }
7022         git_print_page_path($file_name, $ftype, $hash_base)
7023                 if (defined $file_name);
7024
7025         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7026                      $file_name, $file_hash, $ftype);
7027
7028         git_footer_html();
7029 }
7030
7031 sub git_log {
7032         git_log_generic('log', \&git_log_body,
7033                         $hash, $hash_parent);
7034 }
7035
7036 sub git_commit {
7037         $hash ||= $hash_base || "HEAD";
7038         my %co = parse_commit($hash)
7039             or die_error(404, "Unknown commit object");
7040
7041         my $parent  = $co{'parent'};
7042         my $parents = $co{'parents'}; # listref
7043
7044         # we need to prepare $formats_nav before any parameter munging
7045         my $formats_nav;
7046         if (!defined $parent) {
7047                 # --root commitdiff
7048                 $formats_nav .= '(initial)';
7049         } elsif (@$parents == 1) {
7050                 # single parent commit
7051                 $formats_nav .=
7052                         '(parent: ' .
7053                         $cgi->a({-href => href(action=>"commit",
7054                                                hash=>$parent)},
7055                                 esc_html(substr($parent, 0, 7))) .
7056                         ')';
7057         } else {
7058                 # merge commit
7059                 $formats_nav .=
7060                         '(merge: ' .
7061                         join(' ', map {
7062                                 $cgi->a({-href => href(action=>"commit",
7063                                                        hash=>$_)},
7064                                         esc_html(substr($_, 0, 7)));
7065                         } @$parents ) .
7066                         ')';
7067         }
7068         if (gitweb_check_feature('patches') && @$parents <= 1) {
7069                 $formats_nav .= " | " .
7070                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7071                                 "patch");
7072         }
7073
7074         if (!defined $parent) {
7075                 $parent = "--root";
7076         }
7077         my @difftree;
7078         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7079                 @diff_opts,
7080                 (@$parents <= 1 ? $parent : '-c'),
7081                 $hash, "--"
7082                 or die_error(500, "Open git-diff-tree failed");
7083         @difftree = map { chomp; $_ } <$fd>;
7084         close $fd or die_error(404, "Reading git-diff-tree failed");
7085
7086         # non-textual hash id's can be cached
7087         my $expires;
7088         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7089                 $expires = "+1d";
7090         }
7091         my $refs = git_get_references();
7092         my $ref = format_ref_marker($refs, $co{'id'});
7093
7094         git_header_html(undef, $expires);
7095         git_print_page_nav('commit', '',
7096                            $hash, $co{'tree'}, $hash,
7097                            $formats_nav);
7098
7099         if (defined $co{'parent'}) {
7100                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7101         } else {
7102                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7103         }
7104         print "<div class=\"title_text\">\n" .
7105               "<table class=\"object_header\">\n";
7106         git_print_authorship_rows(\%co);
7107         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7108         print "<tr>" .
7109               "<td>tree</td>" .
7110               "<td class=\"sha1\">" .
7111               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7112                        class => "list"}, $co{'tree'}) .
7113               "</td>" .
7114               "<td class=\"link\">" .
7115               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7116                       "tree");
7117         my $snapshot_links = format_snapshot_links($hash);
7118         if (defined $snapshot_links) {
7119                 print " | " . $snapshot_links;
7120         }
7121         print "</td>" .
7122               "</tr>\n";
7123
7124         foreach my $par (@$parents) {
7125                 print "<tr>" .
7126                       "<td>parent</td>" .
7127                       "<td class=\"sha1\">" .
7128                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7129                                class => "list"}, $par) .
7130                       "</td>" .
7131                       "<td class=\"link\">" .
7132                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7133                       " | " .
7134                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7135                       "</td>" .
7136                       "</tr>\n";
7137         }
7138         print "</table>".
7139               "</div>\n";
7140
7141         print "<div class=\"page_body\">\n";
7142         git_print_log($co{'comment'});
7143         print "</div>\n";
7144
7145         git_difftree_body(\@difftree, $hash, @$parents);
7146
7147         git_footer_html();
7148 }
7149
7150 sub git_object {
7151         # object is defined by:
7152         # - hash or hash_base alone
7153         # - hash_base and file_name
7154         my $type;
7155
7156         # - hash or hash_base alone
7157         if ($hash || ($hash_base && !defined $file_name)) {
7158                 my $object_id = $hash || $hash_base;
7159
7160                 open my $fd, "-|", quote_command(
7161                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7162                         or die_error(404, "Object does not exist");
7163                 $type = <$fd>;
7164                 chomp $type;
7165                 close $fd
7166                         or die_error(404, "Object does not exist");
7167
7168         # - hash_base and file_name
7169         } elsif ($hash_base && defined $file_name) {
7170                 $file_name =~ s,/+$,,;
7171
7172                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7173                         or die_error(404, "Base object does not exist");
7174
7175                 # here errors should not hapen
7176                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7177                         or die_error(500, "Open git-ls-tree failed");
7178                 my $line = <$fd>;
7179                 close $fd;
7180
7181                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7182                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7183                         die_error(404, "File or directory for given base does not exist");
7184                 }
7185                 $type = $2;
7186                 $hash = $3;
7187         } else {
7188                 die_error(400, "Not enough information to find object");
7189         }
7190
7191         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7192                                           hash=>$hash, hash_base=>$hash_base,
7193                                           file_name=>$file_name),
7194                              -status => '302 Found');
7195 }
7196
7197 sub git_blobdiff {
7198         my $format = shift || 'html';
7199         my $diff_style = $input_params{'diff_style'} || 'inline';
7200
7201         my $fd;
7202         my @difftree;
7203         my %diffinfo;
7204         my $expires;
7205
7206         # preparing $fd and %diffinfo for git_patchset_body
7207         # new style URI
7208         if (defined $hash_base && defined $hash_parent_base) {
7209                 if (defined $file_name) {
7210                         # read raw output
7211                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7212                                 $hash_parent_base, $hash_base,
7213                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7214                                 or die_error(500, "Open git-diff-tree failed");
7215                         @difftree = map { chomp; $_ } <$fd>;
7216                         close $fd
7217                                 or die_error(404, "Reading git-diff-tree failed");
7218                         @difftree
7219                                 or die_error(404, "Blob diff not found");
7220
7221                 } elsif (defined $hash &&
7222                          $hash =~ /[0-9a-fA-F]{40}/) {
7223                         # try to find filename from $hash
7224
7225                         # read filtered raw output
7226                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7227                                 $hash_parent_base, $hash_base, "--"
7228                                 or die_error(500, "Open git-diff-tree failed");
7229                         @difftree =
7230                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7231                                 # $hash == to_id
7232                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7233                                 map { chomp; $_ } <$fd>;
7234                         close $fd
7235                                 or die_error(404, "Reading git-diff-tree failed");
7236                         @difftree
7237                                 or die_error(404, "Blob diff not found");
7238
7239                 } else {
7240                         die_error(400, "Missing one of the blob diff parameters");
7241                 }
7242
7243                 if (@difftree > 1) {
7244                         die_error(400, "Ambiguous blob diff specification");
7245                 }
7246
7247                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7248                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7249                 $file_name   ||= $diffinfo{'to_file'};
7250
7251                 $hash_parent ||= $diffinfo{'from_id'};
7252                 $hash        ||= $diffinfo{'to_id'};
7253
7254                 # non-textual hash id's can be cached
7255                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7256                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7257                         $expires = '+1d';
7258                 }
7259
7260                 # open patch output
7261                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7262                         '-p', ($format eq 'html' ? "--full-index" : ()),
7263                         $hash_parent_base, $hash_base,
7264                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7265                         or die_error(500, "Open git-diff-tree failed");
7266         }
7267
7268         # old/legacy style URI -- not generated anymore since 1.4.3.
7269         if (!%diffinfo) {
7270                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7271         }
7272
7273         # header
7274         if ($format eq 'html') {
7275                 my $formats_nav =
7276                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7277                                 "raw");
7278                 $formats_nav .= diff_style_nav($diff_style);
7279                 git_header_html(undef, $expires);
7280                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7281                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7282                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7283                 } else {
7284                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7285                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7286                 }
7287                 if (defined $file_name) {
7288                         git_print_page_path($file_name, "blob", $hash_base);
7289                 } else {
7290                         print "<div class=\"page_path\"></div>\n";
7291                 }
7292
7293         } elsif ($format eq 'plain') {
7294                 print $cgi->header(
7295                         -type => 'text/plain',
7296                         -charset => 'utf-8',
7297                         -expires => $expires,
7298                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7299
7300                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7301
7302         } else {
7303                 die_error(400, "Unknown blobdiff format");
7304         }
7305
7306         # patch
7307         if ($format eq 'html') {
7308                 print "<div class=\"page_body\">\n";
7309
7310                 git_patchset_body($fd, $diff_style,
7311                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7312                 close $fd;
7313
7314                 print "</div>\n"; # class="page_body"
7315                 git_footer_html();
7316
7317         } else {
7318                 while (my $line = <$fd>) {
7319                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7320                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7321
7322                         print $line;
7323
7324                         last if $line =~ m!^\+\+\+!;
7325                 }
7326                 local $/ = undef;
7327                 print <$fd>;
7328                 close $fd;
7329         }
7330 }
7331
7332 sub git_blobdiff_plain {
7333         git_blobdiff('plain');
7334 }
7335
7336 # assumes that it is added as later part of already existing navigation,
7337 # so it returns "| foo | bar" rather than just "foo | bar"
7338 sub diff_style_nav {
7339         my ($diff_style, $is_combined) = @_;
7340         $diff_style ||= 'inline';
7341
7342         return "" if ($is_combined);
7343
7344         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7345         my %styles = @styles;
7346         @styles =
7347                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7348
7349         return join '',
7350                 map { " | ".$_ }
7351                 map {
7352                         $_ eq $diff_style ? $styles{$_} :
7353                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7354                 } @styles;
7355 }
7356
7357 sub git_commitdiff {
7358         my %params = @_;
7359         my $format = $params{-format} || 'html';
7360         my $diff_style = $input_params{'diff_style'} || 'inline';
7361
7362         my ($patch_max) = gitweb_get_feature('patches');
7363         if ($format eq 'patch') {
7364                 die_error(403, "Patch view not allowed") unless $patch_max;
7365         }
7366
7367         $hash ||= $hash_base || "HEAD";
7368         my %co = parse_commit($hash)
7369             or die_error(404, "Unknown commit object");
7370
7371         # choose format for commitdiff for merge
7372         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7373                 $hash_parent = '--cc';
7374         }
7375         # we need to prepare $formats_nav before almost any parameter munging
7376         my $formats_nav;
7377         if ($format eq 'html') {
7378                 $formats_nav =
7379                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7380                                 "raw");
7381                 if ($patch_max && @{$co{'parents'}} <= 1) {
7382                         $formats_nav .= " | " .
7383                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7384                                         "patch");
7385                 }
7386                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7387
7388                 if (defined $hash_parent &&
7389                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7390                         # commitdiff with two commits given
7391                         my $hash_parent_short = $hash_parent;
7392                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7393                                 $hash_parent_short = substr($hash_parent, 0, 7);
7394                         }
7395                         $formats_nav .=
7396                                 ' (from';
7397                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7398                                 if ($co{'parents'}[$i] eq $hash_parent) {
7399                                         $formats_nav .= ' parent ' . ($i+1);
7400                                         last;
7401                                 }
7402                         }
7403                         $formats_nav .= ': ' .
7404                                 $cgi->a({-href => href(-replay=>1,
7405                                                        hash=>$hash_parent, hash_base=>undef)},
7406                                         esc_html($hash_parent_short)) .
7407                                 ')';
7408                 } elsif (!$co{'parent'}) {
7409                         # --root commitdiff
7410                         $formats_nav .= ' (initial)';
7411                 } elsif (scalar @{$co{'parents'}} == 1) {
7412                         # single parent commit
7413                         $formats_nav .=
7414                                 ' (parent: ' .
7415                                 $cgi->a({-href => href(-replay=>1,
7416                                                        hash=>$co{'parent'}, hash_base=>undef)},
7417                                         esc_html(substr($co{'parent'}, 0, 7))) .
7418                                 ')';
7419                 } else {
7420                         # merge commit
7421                         if ($hash_parent eq '--cc') {
7422                                 $formats_nav .= ' | ' .
7423                                         $cgi->a({-href => href(-replay=>1,
7424                                                                hash=>$hash, hash_parent=>'-c')},
7425                                                 'combined');
7426                         } else { # $hash_parent eq '-c'
7427                                 $formats_nav .= ' | ' .
7428                                         $cgi->a({-href => href(-replay=>1,
7429                                                                hash=>$hash, hash_parent=>'--cc')},
7430                                                 'compact');
7431                         }
7432                         $formats_nav .=
7433                                 ' (merge: ' .
7434                                 join(' ', map {
7435                                         $cgi->a({-href => href(-replay=>1,
7436                                                                hash=>$_, hash_base=>undef)},
7437                                                 esc_html(substr($_, 0, 7)));
7438                                 } @{$co{'parents'}} ) .
7439                                 ')';
7440                 }
7441         }
7442
7443         my $hash_parent_param = $hash_parent;
7444         if (!defined $hash_parent_param) {
7445                 # --cc for multiple parents, --root for parentless
7446                 $hash_parent_param =
7447                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7448         }
7449
7450         # read commitdiff
7451         my $fd;
7452         my @difftree;
7453         if ($format eq 'html') {
7454                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7455                         "--no-commit-id", "--patch-with-raw", "--full-index",
7456                         $hash_parent_param, $hash, "--"
7457                         or die_error(500, "Open git-diff-tree failed");
7458
7459                 while (my $line = <$fd>) {
7460                         chomp $line;
7461                         # empty line ends raw part of diff-tree output
7462                         last unless $line;
7463                         push @difftree, scalar parse_difftree_raw_line($line);
7464                 }
7465
7466         } elsif ($format eq 'plain') {
7467                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7468                         '-p', $hash_parent_param, $hash, "--"
7469                         or die_error(500, "Open git-diff-tree failed");
7470         } elsif ($format eq 'patch') {
7471                 # For commit ranges, we limit the output to the number of
7472                 # patches specified in the 'patches' feature.
7473                 # For single commits, we limit the output to a single patch,
7474                 # diverging from the git-format-patch default.
7475                 my @commit_spec = ();
7476                 if ($hash_parent) {
7477                         if ($patch_max > 0) {
7478                                 push @commit_spec, "-$patch_max";
7479                         }
7480                         push @commit_spec, '-n', "$hash_parent..$hash";
7481                 } else {
7482                         if ($params{-single}) {
7483                                 push @commit_spec, '-1';
7484                         } else {
7485                                 if ($patch_max > 0) {
7486                                         push @commit_spec, "-$patch_max";
7487                                 }
7488                                 push @commit_spec, "-n";
7489                         }
7490                         push @commit_spec, '--root', $hash;
7491                 }
7492                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7493                         '--encoding=utf8', '--stdout', @commit_spec
7494                         or die_error(500, "Open git-format-patch failed");
7495         } else {
7496                 die_error(400, "Unknown commitdiff format");
7497         }
7498
7499         # non-textual hash id's can be cached
7500         my $expires;
7501         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7502                 $expires = "+1d";
7503         }
7504
7505         # write commit message
7506         if ($format eq 'html') {
7507                 my $refs = git_get_references();
7508                 my $ref = format_ref_marker($refs, $co{'id'});
7509
7510                 git_header_html(undef, $expires);
7511                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7512                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7513                 print "<div class=\"title_text\">\n" .
7514                       "<table class=\"object_header\">\n";
7515                 git_print_authorship_rows(\%co);
7516                 print "</table>".
7517                       "</div>\n";
7518                 print "<div class=\"page_body\">\n";
7519                 if (@{$co{'comment'}} > 1) {
7520                         print "<div class=\"log\">\n";
7521                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7522                         print "</div>\n"; # class="log"
7523                 }
7524
7525         } elsif ($format eq 'plain') {
7526                 my $refs = git_get_references("tags");
7527                 my $tagname = git_get_rev_name_tags($hash);
7528                 my $filename = basename($project) . "-$hash.patch";
7529
7530                 print $cgi->header(
7531                         -type => 'text/plain',
7532                         -charset => 'utf-8',
7533                         -expires => $expires,
7534                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7535                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7536                 print "From: " . to_utf8($co{'author'}) . "\n";
7537                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7538                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7539
7540                 print "X-Git-Tag: $tagname\n" if $tagname;
7541                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7542
7543                 foreach my $line (@{$co{'comment'}}) {
7544                         print to_utf8($line) . "\n";
7545                 }
7546                 print "---\n\n";
7547         } elsif ($format eq 'patch') {
7548                 my $filename = basename($project) . "-$hash.patch";
7549
7550                 print $cgi->header(
7551                         -type => 'text/plain',
7552                         -charset => 'utf-8',
7553                         -expires => $expires,
7554                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7555         }
7556
7557         # write patch
7558         if ($format eq 'html') {
7559                 my $use_parents = !defined $hash_parent ||
7560                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7561                 git_difftree_body(\@difftree, $hash,
7562                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7563                 print "<br/>\n";
7564
7565                 git_patchset_body($fd, $diff_style,
7566                                   \@difftree, $hash,
7567                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7568                 close $fd;
7569                 print "</div>\n"; # class="page_body"
7570                 git_footer_html();
7571
7572         } elsif ($format eq 'plain') {
7573                 local $/ = undef;
7574                 print <$fd>;
7575                 close $fd
7576                         or print "Reading git-diff-tree failed\n";
7577         } elsif ($format eq 'patch') {
7578                 local $/ = undef;
7579                 print <$fd>;
7580                 close $fd
7581                         or print "Reading git-format-patch failed\n";
7582         }
7583 }
7584
7585 sub git_commitdiff_plain {
7586         git_commitdiff(-format => 'plain');
7587 }
7588
7589 # format-patch-style patches
7590 sub git_patch {
7591         git_commitdiff(-format => 'patch', -single => 1);
7592 }
7593
7594 sub git_patches {
7595         git_commitdiff(-format => 'patch');
7596 }
7597
7598 sub git_history {
7599         git_log_generic('history', \&git_history_body,
7600                         $hash_base, $hash_parent_base,
7601                         $file_name, $hash);
7602 }
7603
7604 sub git_search {
7605         $searchtype ||= 'commit';
7606
7607         # check if appropriate features are enabled
7608         gitweb_check_feature('search')
7609                 or die_error(403, "Search is disabled");
7610         if ($searchtype eq 'pickaxe') {
7611                 # pickaxe may take all resources of your box and run for several minutes
7612                 # with every query - so decide by yourself how public you make this feature
7613                 gitweb_check_feature('pickaxe')
7614                         or die_error(403, "Pickaxe search is disabled");
7615         }
7616         if ($searchtype eq 'grep') {
7617                 # grep search might be potentially CPU-intensive, too
7618                 gitweb_check_feature('grep')
7619                         or die_error(403, "Grep search is disabled");
7620         }
7621
7622         if (!defined $searchtext) {
7623                 die_error(400, "Text field is empty");
7624         }
7625         if (!defined $hash) {
7626                 $hash = git_get_head_hash($project);
7627         }
7628         my %co = parse_commit($hash);
7629         if (!%co) {
7630                 die_error(404, "Unknown commit object");
7631         }
7632         if (!defined $page) {
7633                 $page = 0;
7634         }
7635
7636         if ($searchtype eq 'commit' ||
7637             $searchtype eq 'author' ||
7638             $searchtype eq 'committer') {
7639                 git_search_message(%co);
7640         } elsif ($searchtype eq 'pickaxe') {
7641                 git_search_changes(%co);
7642         } elsif ($searchtype eq 'grep') {
7643                 git_search_files(%co);
7644         } else {
7645                 die_error(400, "Unknown search type");
7646         }
7647 }
7648
7649 sub git_search_help {
7650         git_header_html();
7651         git_print_page_nav('','', $hash,$hash,$hash);
7652         print <<EOT;
7653 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7654 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7655 the pattern entered is recognized as the POSIX extended
7656 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7657 insensitive).</p>
7658 <dl>
7659 <dt><b>commit</b></dt>
7660 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7661 EOT
7662         my $have_grep = gitweb_check_feature('grep');
7663         if ($have_grep) {
7664                 print <<EOT;
7665 <dt><b>grep</b></dt>
7666 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7667     a different one) are searched for the given pattern. On large trees, this search can take
7668 a while and put some strain on the server, so please use it with some consideration. Note that
7669 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7670 case-sensitive.</dd>
7671 EOT
7672         }
7673         print <<EOT;
7674 <dt><b>author</b></dt>
7675 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7676 <dt><b>committer</b></dt>
7677 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7678 EOT
7679         my $have_pickaxe = gitweb_check_feature('pickaxe');
7680         if ($have_pickaxe) {
7681                 print <<EOT;
7682 <dt><b>pickaxe</b></dt>
7683 <dd>All commits that caused the string to appear or disappear from any file (changes that
7684 added, removed or "modified" the string) will be listed. This search can take a while and
7685 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7686 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7687 EOT
7688         }
7689         print "</dl>\n";
7690         git_footer_html();
7691 }
7692
7693 sub git_shortlog {
7694         git_log_generic('shortlog', \&git_shortlog_body,
7695                         $hash, $hash_parent);
7696 }
7697
7698 ## ......................................................................
7699 ## feeds (RSS, Atom; OPML)
7700
7701 sub git_feed {
7702         my $format = shift || 'atom';
7703         my $have_blame = gitweb_check_feature('blame');
7704
7705         # Atom: http://www.atomenabled.org/developers/syndication/
7706         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7707         if ($format ne 'rss' && $format ne 'atom') {
7708                 die_error(400, "Unknown web feed format");
7709         }
7710
7711         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7712         my $head = $hash || 'HEAD';
7713         my @commitlist = parse_commits($head, 150, 0, $file_name);
7714
7715         my %latest_commit;
7716         my %latest_date;
7717         my $content_type = "application/$format+xml";
7718         if (defined $cgi->http('HTTP_ACCEPT') &&
7719                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7720                 # browser (feed reader) prefers text/xml
7721                 $content_type = 'text/xml';
7722         }
7723         if (defined($commitlist[0])) {
7724                 %latest_commit = %{$commitlist[0]};
7725                 my $latest_epoch = $latest_commit{'committer_epoch'};
7726                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7727                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7728                 if (defined $if_modified) {
7729                         my $since;
7730                         if (eval { require HTTP::Date; 1; }) {
7731                                 $since = HTTP::Date::str2time($if_modified);
7732                         } elsif (eval { require Time::ParseDate; 1; }) {
7733                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7734                         }
7735                         if (defined $since && $latest_epoch <= $since) {
7736                                 print $cgi->header(
7737                                         -type => $content_type,
7738                                         -charset => 'utf-8',
7739                                         -last_modified => $latest_date{'rfc2822'},
7740                                         -status => '304 Not Modified');
7741                                 return;
7742                         }
7743                 }
7744                 print $cgi->header(
7745                         -type => $content_type,
7746                         -charset => 'utf-8',
7747                         -last_modified => $latest_date{'rfc2822'});
7748         } else {
7749                 print $cgi->header(
7750                         -type => $content_type,
7751                         -charset => 'utf-8');
7752         }
7753
7754         # Optimization: skip generating the body if client asks only
7755         # for Last-Modified date.
7756         return if ($cgi->request_method() eq 'HEAD');
7757
7758         # header variables
7759         my $title = "$site_name - $project/$action";
7760         my $feed_type = 'log';
7761         if (defined $hash) {
7762                 $title .= " - '$hash'";
7763                 $feed_type = 'branch log';
7764                 if (defined $file_name) {
7765                         $title .= " :: $file_name";
7766                         $feed_type = 'history';
7767                 }
7768         } elsif (defined $file_name) {
7769                 $title .= " - $file_name";
7770                 $feed_type = 'history';
7771         }
7772         $title .= " $feed_type";
7773         my $descr = git_get_project_description($project);
7774         if (defined $descr) {
7775                 $descr = esc_html($descr);
7776         } else {
7777                 $descr = "$project " .
7778                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7779                          " feed";
7780         }
7781         my $owner = git_get_project_owner($project);
7782         $owner = esc_html($owner);
7783
7784         #header
7785         my $alt_url;
7786         if (defined $file_name) {
7787                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7788         } elsif (defined $hash) {
7789                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7790         } else {
7791                 $alt_url = href(-full=>1, action=>"summary");
7792         }
7793         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7794         if ($format eq 'rss') {
7795                 print <<XML;
7796 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7797 <channel>
7798 XML
7799                 print "<title>$title</title>\n" .
7800                       "<link>$alt_url</link>\n" .
7801                       "<description>$descr</description>\n" .
7802                       "<language>en</language>\n" .
7803                       # project owner is responsible for 'editorial' content
7804                       "<managingEditor>$owner</managingEditor>\n";
7805                 if (defined $logo || defined $favicon) {
7806                         # prefer the logo to the favicon, since RSS
7807                         # doesn't allow both
7808                         my $img = esc_url($logo || $favicon);
7809                         print "<image>\n" .
7810                               "<url>$img</url>\n" .
7811                               "<title>$title</title>\n" .
7812                               "<link>$alt_url</link>\n" .
7813                               "</image>\n";
7814                 }
7815                 if (%latest_date) {
7816                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7817                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7818                 }
7819                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7820         } elsif ($format eq 'atom') {
7821                 print <<XML;
7822 <feed xmlns="http://www.w3.org/2005/Atom">
7823 XML
7824                 print "<title>$title</title>\n" .
7825                       "<subtitle>$descr</subtitle>\n" .
7826                       '<link rel="alternate" type="text/html" href="' .
7827                       $alt_url . '" />' . "\n" .
7828                       '<link rel="self" type="' . $content_type . '" href="' .
7829                       $cgi->self_url() . '" />' . "\n" .
7830                       "<id>" . href(-full=>1) . "</id>\n" .
7831                       # use project owner for feed author
7832                       "<author><name>$owner</name></author>\n";
7833                 if (defined $favicon) {
7834                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7835                 }
7836                 if (defined $logo) {
7837                         # not twice as wide as tall: 72 x 27 pixels
7838                         print "<logo>" . esc_url($logo) . "</logo>\n";
7839                 }
7840                 if (! %latest_date) {
7841                         # dummy date to keep the feed valid until commits trickle in:
7842                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7843                 } else {
7844                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7845                 }
7846                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7847         }
7848
7849         # contents
7850         for (my $i = 0; $i <= $#commitlist; $i++) {
7851                 my %co = %{$commitlist[$i]};
7852                 my $commit = $co{'id'};
7853                 # we read 150, we always show 30 and the ones more recent than 48 hours
7854                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7855                         last;
7856                 }
7857                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7858
7859                 # get list of changed files
7860                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7861                         $co{'parent'} || "--root",
7862                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7863                         or next;
7864                 my @difftree = map { chomp; $_ } <$fd>;
7865                 close $fd
7866                         or next;
7867
7868                 # print element (entry, item)
7869                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7870                 if ($format eq 'rss') {
7871                         print "<item>\n" .
7872                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7873                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7874                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7875                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7876                               "<link>$co_url</link>\n" .
7877                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7878                               "<content:encoded>" .
7879                               "<![CDATA[\n";
7880                 } elsif ($format eq 'atom') {
7881                         print "<entry>\n" .
7882                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7883                               "<updated>$cd{'iso-8601'}</updated>\n" .
7884                               "<author>\n" .
7885                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7886                         if ($co{'author_email'}) {
7887                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7888                         }
7889                         print "</author>\n" .
7890                               # use committer for contributor
7891                               "<contributor>\n" .
7892                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7893                         if ($co{'committer_email'}) {
7894                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7895                         }
7896                         print "</contributor>\n" .
7897                               "<published>$cd{'iso-8601'}</published>\n" .
7898                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7899                               "<id>$co_url</id>\n" .
7900                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7901                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7902                 }
7903                 my $comment = $co{'comment'};
7904                 print "<pre>\n";
7905                 foreach my $line (@$comment) {
7906                         $line = esc_html($line);
7907                         print "$line\n";
7908                 }
7909                 print "</pre><ul>\n";
7910                 foreach my $difftree_line (@difftree) {
7911                         my %difftree = parse_difftree_raw_line($difftree_line);
7912                         next if !$difftree{'from_id'};
7913
7914                         my $file = $difftree{'file'} || $difftree{'to_file'};
7915
7916                         print "<li>" .
7917                               "[" .
7918                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7919                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7920                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7921                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7922                                       -title => "diff"}, 'D');
7923                         if ($have_blame) {
7924                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7925                                                              file_name=>$file, hash_base=>$commit),
7926                                               -title => "blame"}, 'B');
7927                         }
7928                         # if this is not a feed of a file history
7929                         if (!defined $file_name || $file_name ne $file) {
7930                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7931                                                              file_name=>$file, hash=>$commit),
7932                                               -title => "history"}, 'H');
7933                         }
7934                         $file = esc_path($file);
7935                         print "] ".
7936                               "$file</li>\n";
7937                 }
7938                 if ($format eq 'rss') {
7939                         print "</ul>]]>\n" .
7940                               "</content:encoded>\n" .
7941                               "</item>\n";
7942                 } elsif ($format eq 'atom') {
7943                         print "</ul>\n</div>\n" .
7944                               "</content>\n" .
7945                               "</entry>\n";
7946                 }
7947         }
7948
7949         # end of feed
7950         if ($format eq 'rss') {
7951                 print "</channel>\n</rss>\n";
7952         } elsif ($format eq 'atom') {
7953                 print "</feed>\n";
7954         }
7955 }
7956
7957 sub git_rss {
7958         git_feed('rss');
7959 }
7960
7961 sub git_atom {
7962         git_feed('atom');
7963 }
7964
7965 sub git_opml {
7966         my @list = git_get_projects_list($project_filter, $strict_export);
7967         if (!@list) {
7968                 die_error(404, "No projects found");
7969         }
7970
7971         print $cgi->header(
7972                 -type => 'text/xml',
7973                 -charset => 'utf-8',
7974                 -content_disposition => 'inline; filename="opml.xml"');
7975
7976         my $title = esc_html($site_name);
7977         my $filter = " within subdirectory ";
7978         if (defined $project_filter) {
7979                 $filter .= esc_html($project_filter);
7980         } else {
7981                 $filter = "";
7982         }
7983         print <<XML;
7984 <?xml version="1.0" encoding="utf-8"?>
7985 <opml version="1.0">
7986 <head>
7987   <title>$title OPML Export$filter</title>
7988 </head>
7989 <body>
7990 <outline text="git RSS feeds">
7991 XML
7992
7993         foreach my $pr (@list) {
7994                 my %proj = %$pr;
7995                 my $head = git_get_head_hash($proj{'path'});
7996                 if (!defined $head) {
7997                         next;
7998                 }
7999                 $git_dir = "$projectroot/$proj{'path'}";
8000                 my %co = parse_commit($head);
8001                 if (!%co) {
8002                         next;
8003                 }
8004
8005                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8006                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8007                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8008                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8009         }
8010         print <<XML;
8011 </outline>
8012 </body>
8013 </opml>
8014 XML
8015 }