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