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