gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # 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 # URI of GIT logo (72x27 size)
 100 our $logo = "++GITWEB_LOGO++";
 101 # URI of GIT favicon, assumed to be image/png type
 102 our $favicon = "++GITWEB_FAVICON++";
 103 # URI of gitweb.js (JavaScript code for gitweb)
 104 our $javascript = "++GITWEB_JS++";
 105
 106 # URI and label (title) of GIT logo link
 107 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 108 #our $logo_label = "git documentation";
 109 our $logo_url = "http://git-scm.com/";
 110 our $logo_label = "git homepage";
 111
 112 # source of projects list
 113 our $projects_list = "++GITWEB_LIST++";
 114
 115 # the width (in characters) of the projects list "Description" column
 116 our $projects_list_description_width = 25;
 117
 118 # default order of projects list
 119 # valid values are none, project, descr, owner, and age
 120 our $default_projects_order = "project";
 121
 122 # show repository only if this file exists
 123 # (only effective if this variable evaluates to true)
 124 our $export_ok = "++GITWEB_EXPORT_OK++";
 125
 126 # show repository only if this subroutine returns true
 127 # when given the path to the project, for example:
 128 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 129 our $export_auth_hook = undef;
 130
 131 # only allow viewing of repositories also shown on the overview page
 132 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 133
 134 # list of git base URLs used for URL to where fetch project from,
 135 # i.e. full URL is "$git_base_url/$project"
 136 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 137
 138 # default blob_plain mimetype and default charset for text/plain blob
 139 our $default_blob_plain_mimetype = 'text/plain';
 140 our $default_text_plain_charset  = undef;
 141
 142 # file to use for guessing MIME types before trying /etc/mime.types
 143 # (relative to the current git repository)
 144 our $mimetypes_file = undef;
 145
 146 # assume this charset if line contains non-UTF-8 characters;
 147 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 148 # for which encoding all byte sequences are valid, for example
 149 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 150 # could be even 'utf-8' for the old behavior)
 151 our $fallback_encoding = 'latin1';
 152
 153 # rename detection options for git-diff and git-diff-tree
 154 # - default is '-M', with the cost proportional to
 155 #   (number of removed files) * (number of new files).
 156 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 157 #   (number of changed files + number of removed files) * (number of new files)
 158 # - even more costly is '-C', '--find-copies-harder' with cost
 159 #   (number of files in the original tree) * (number of new files)
 160 # - one might want to include '-B' option, e.g. '-B', '-M'
 161 our @diff_opts = ('-M'); # taken from git_commit
 162
 163 # Disables features that would allow repository owners to inject script into
 164 # the gitweb domain.
 165 our $prevent_xss = 0;
 166
 167 # Path to the highlight executable to use (must be the one from
 168 # http://www.andre-simon.de due to assumptions about parameters and output).
 169 # Useful if highlight is not installed on your webserver's PATH.
 170 # [Default: highlight]
 171 our $highlight_bin = "++HIGHLIGHT_BIN++";
 172
 173 # information about snapshot formats that gitweb is capable of serving
 174 our %known_snapshot_formats = (
 175         # name => {
 176         #       'display' => display name,
 177         #       'type' => mime type,
 178         #       'suffix' => filename suffix,
 179         #       'format' => --format for git-archive,
 180         #       'compressor' => [compressor command and arguments]
 181         #                       (array reference, optional)
 182         #       'disabled' => boolean (optional)}
 183         #
 184         'tgz' => {
 185                 'display' => 'tar.gz',
 186                 'type' => 'application/x-gzip',
 187                 'suffix' => '.tar.gz',
 188                 'format' => 'tar',
 189                 'compressor' => ['gzip']},
 190
 191         'tbz2' => {
 192                 'display' => 'tar.bz2',
 193                 'type' => 'application/x-bzip2',
 194                 'suffix' => '.tar.bz2',
 195                 'format' => 'tar',
 196                 'compressor' => ['bzip2']},
 197
 198         'txz' => {
 199                 'display' => 'tar.xz',
 200                 'type' => 'application/x-xz',
 201                 'suffix' => '.tar.xz',
 202                 'format' => 'tar',
 203                 'compressor' => ['xz'],
 204                 'disabled' => 1},
 205
 206         'zip' => {
 207                 'display' => 'zip',
 208                 'type' => 'application/x-zip',
 209                 'suffix' => '.zip',
 210                 'format' => 'zip'},
 211 );
 212
 213 # Aliases so we understand old gitweb.snapshot values in repository
 214 # configuration.
 215 our %known_snapshot_format_aliases = (
 216         'gzip'  => 'tgz',
 217         'bzip2' => 'tbz2',
 218         'xz'    => 'txz',
 219
 220         # backward compatibility: legacy gitweb config support
 221         'x-gzip' => undef, 'gz' => undef,
 222         'x-bzip2' => undef, 'bz2' => undef,
 223         'x-zip' => undef, '' => undef,
 224 );
 225
 226 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 227 # are changed, it may be appropriate to change these values too via
 228 # $GITWEB_CONFIG.
 229 our %avatar_size = (
 230         'default' => 16,
 231         'double'  => 32
 232 );
 233
 234 # Used to set the maximum load that we will still respond to gitweb queries.
 235 # If server load exceed this value then return "503 server busy" error.
 236 # If gitweb cannot determined server load, it is taken to be 0.
 237 # Leave it undefined (or set to 'undef') to turn off load checking.
 238 our $maxload = 300;
 239
 240 # configuration for 'highlight' (http://www.andre-simon.de/)
 241 # match by basename
 242 our %highlight_basename = (
 243         #'Program' => 'py',
 244         #'Library' => 'py',
 245         'SConstruct' => 'py', # SCons equivalent of Makefile
 246         'Makefile' => 'make',
 247 );
 248 # match by extension
 249 our %highlight_ext = (
 250         # main extensions, defining name of syntax;
 251         # see files in /usr/share/highlight/langDefs/ directory
 252         map { $_ => $_ }
 253                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 254         # alternate extensions, see /etc/highlight/filetypes.conf
 255         'h' => 'c',
 256         map { $_ => 'sh'  } qw(bash zsh ksh),
 257         map { $_ => 'cpp' } qw(cxx c++ cc),
 258         map { $_ => 'php' } qw(php3 php4 php5 phps),
 259         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 260         map { $_ => 'make'} qw(mak mk),
 261         map { $_ => 'xml' } qw(xhtml html htm),
 262 );
 263
 264 # You define site-wide feature defaults here; override them with
 265 # $GITWEB_CONFIG as necessary.
 266 our %feature = (
 267         # feature => {
 268         #       'sub' => feature-sub (subroutine),
 269         #       'override' => allow-override (boolean),
 270         #       'default' => [ default options...] (array reference)}
 271         #
 272         # if feature is overridable (it means that allow-override has true value),
 273         # then feature-sub will be called with default options as parameters;
 274         # return value of feature-sub indicates if to enable specified feature
 275         #
 276         # if there is no 'sub' key (no feature-sub), then feature cannot be
 277         # overridden
 278         #
 279         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 280         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 281         # is enabled
 282
 283         # Enable the 'blame' blob view, showing the last commit that modified
 284         # each line in the file. This can be very CPU-intensive.
 285
 286         # To enable system wide have in $GITWEB_CONFIG
 287         # $feature{'blame'}{'default'} = [1];
 288         # To have project specific config enable override in $GITWEB_CONFIG
 289         # $feature{'blame'}{'override'} = 1;
 290         # and in project config gitweb.blame = 0|1;
 291         'blame' => {
 292                 'sub' => sub { feature_bool('blame', @_) },
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Enable the 'snapshot' link, providing a compressed archive of any
 297         # tree. This can potentially generate high traffic if you have large
 298         # project.
 299
 300         # Value is a list of formats defined in %known_snapshot_formats that
 301         # you wish to offer.
 302         # To disable system wide have in $GITWEB_CONFIG
 303         # $feature{'snapshot'}{'default'} = [];
 304         # To have project specific config enable override in $GITWEB_CONFIG
 305         # $feature{'snapshot'}{'override'} = 1;
 306         # and in project config, a comma-separated list of formats or "none"
 307         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 308         'snapshot' => {
 309                 'sub' => \&feature_snapshot,
 310                 'override' => 0,
 311                 'default' => ['tgz']},
 312
 313         # Enable text search, which will list the commits which match author,
 314         # committer or commit text to a given string.  Enabled by default.
 315         # Project specific override is not supported.
 316         'search' => {
 317                 'override' => 0,
 318                 'default' => [1]},
 319
 320         # Enable grep search, which will list the files in currently selected
 321         # tree containing the given string. Enabled by default. This can be
 322         # potentially CPU-intensive, of course.
 323
 324         # To enable system wide have in $GITWEB_CONFIG
 325         # $feature{'grep'}{'default'} = [1];
 326         # To have project specific config enable override in $GITWEB_CONFIG
 327         # $feature{'grep'}{'override'} = 1;
 328         # and in project config gitweb.grep = 0|1;
 329         'grep' => {
 330                 'sub' => sub { feature_bool('grep', @_) },
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable the pickaxe search, which will list the commits that modified
 335         # a given string in a file. This can be practical and quite faster
 336         # alternative to 'blame', but still potentially CPU-intensive.
 337
 338         # To enable system wide have in $GITWEB_CONFIG
 339         # $feature{'pickaxe'}{'default'} = [1];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'pickaxe'}{'override'} = 1;
 342         # and in project config gitweb.pickaxe = 0|1;
 343         'pickaxe' => {
 344                 'sub' => sub { feature_bool('pickaxe', @_) },
 345                 'override' => 0,
 346                 'default' => [1]},
 347
 348         # Enable showing size of blobs in a 'tree' view, in a separate
 349         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 350
 351         # To disable system wide have in $GITWEB_CONFIG
 352         # $feature{'show-sizes'}{'default'} = [0];
 353         # To have project specific config enable override in $GITWEB_CONFIG
 354         # $feature{'show-sizes'}{'override'} = 1;
 355         # and in project config gitweb.showsizes = 0|1;
 356         'show-sizes' => {
 357                 'sub' => sub { feature_bool('showsizes', @_) },
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Make gitweb use an alternative format of the URLs which can be
 362         # more readable and natural-looking: project name is embedded
 363         # directly in the path and the query string contains other
 364         # auxiliary information. All gitweb installations recognize
 365         # URL in either format; this configures in which formats gitweb
 366         # generates links.
 367
 368         # To enable system wide have in $GITWEB_CONFIG
 369         # $feature{'pathinfo'}{'default'} = [1];
 370         # Project specific override is not supported.
 371
 372         # Note that you will need to change the default location of CSS,
 373         # favicon, logo and possibly other files to an absolute URL. Also,
 374         # if gitweb.cgi serves as your indexfile, you will need to force
 375         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 376         'pathinfo' => {
 377                 'override' => 0,
 378                 'default' => [0]},
 379
 380         # Make gitweb consider projects in project root subdirectories
 381         # to be forks of existing projects. Given project $projname.git,
 382         # projects matching $projname/*.git will not be shown in the main
 383         # projects list, instead a '+' mark will be added to $projname
 384         # there and a 'forks' view will be enabled for the project, listing
 385         # all the forks. If project list is taken from a file, forks have
 386         # to be listed after the main project.
 387
 388         # To enable system wide have in $GITWEB_CONFIG
 389         # $feature{'forks'}{'default'} = [1];
 390         # Project specific override is not supported.
 391         'forks' => {
 392                 'override' => 0,
 393                 'default' => [0]},
 394
 395         # Insert custom links to the action bar of all project pages.
 396         # This enables you mainly to link to third-party scripts integrating
 397         # into gitweb; e.g. git-browser for graphical history representation
 398         # or custom web-based repository administration interface.
 399
 400         # The 'default' value consists of a list of triplets in the form
 401         # (label, link, position) where position is the label after which
 402         # to insert the link and link is a format string where %n expands
 403         # to the project name, %f to the project path within the filesystem,
 404         # %h to the current hash (h gitweb parameter) and %b to the current
 405         # hash base (hb gitweb parameter); %% expands to %.
 406
 407         # To enable system wide have in $GITWEB_CONFIG e.g.
 408         # $feature{'actions'}{'default'} = [('graphiclog',
 409         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 410         # Project specific override is not supported.
 411         'actions' => {
 412                 'override' => 0,
 413                 'default' => []},
 414
 415         # Allow gitweb scan project content tags described in ctags/
 416         # of project repository, and display the popular Web 2.0-ish
 417         # "tag cloud" near the project list. Note that this is something
 418         # COMPLETELY different from the normal Git tags.
 419
 420         # gitweb by itself can show existing tags, but it does not handle
 421         # tagging itself; you need an external application for that.
 422         # For an example script, check Girocco's cgi/tagproj.cgi.
 423         # You may want to install the HTML::TagCloud Perl module to get
 424         # a pretty tag cloud instead of just a list of tags.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 428         # Project specific override is not supported.
 429         'ctags' => {
 430                 'override' => 0,
 431                 'default' => [0]},
 432
 433         # The maximum number of patches in a patchset generated in patch
 434         # view. Set this to 0 or undef to disable patch view, or to a
 435         # negative number to remove any limit.
 436
 437         # To disable system wide have in $GITWEB_CONFIG
 438         # $feature{'patches'}{'default'} = [0];
 439         # To have project specific config enable override in $GITWEB_CONFIG
 440         # $feature{'patches'}{'override'} = 1;
 441         # and in project config gitweb.patches = 0|n;
 442         # where n is the maximum number of patches allowed in a patchset.
 443         'patches' => {
 444                 'sub' => \&feature_patches,
 445                 'override' => 0,
 446                 'default' => [16]},
 447
 448         # Avatar support. When this feature is enabled, views such as
 449         # shortlog or commit will display an avatar associated with
 450         # the email of the committer(s) and/or author(s).
 451
 452         # Currently available providers are gravatar and picon.
 453         # If an unknown provider is specified, the feature is disabled.
 454
 455         # Gravatar depends on Digest::MD5.
 456         # Picon currently relies on the indiana.edu database.
 457
 458         # To enable system wide have in $GITWEB_CONFIG
 459         # $feature{'avatar'}{'default'} = ['<provider>'];
 460         # where <provider> is either gravatar or picon.
 461         # To have project specific config enable override in $GITWEB_CONFIG
 462         # $feature{'avatar'}{'override'} = 1;
 463         # and in project config gitweb.avatar = <provider>;
 464         'avatar' => {
 465                 'sub' => \&feature_avatar,
 466                 'override' => 0,
 467                 'default' => ['']},
 468
 469         # Enable displaying how much time and how many git commands
 470         # it took to generate and display page.  Disabled by default.
 471         # Project specific override is not supported.
 472         'timed' => {
 473                 'override' => 0,
 474                 'default' => [0]},
 475
 476         # Enable turning some links into links to actions which require
 477         # JavaScript to run (like 'blame_incremental').  Not enabled by
 478         # default.  Project specific override is currently not supported.
 479         'javascript-actions' => {
 480                 'override' => 0,
 481                 'default' => [0]},
 482
 483         # Syntax highlighting support. This is based on Daniel Svensson's
 484         # and Sham Chukoury's work in gitweb-xmms2.git.
 485         # It requires the 'highlight' program present in $PATH,
 486         # and therefore is disabled by default.
 487
 488         # To enable system wide have in $GITWEB_CONFIG
 489         # $feature{'highlight'}{'default'} = [1];
 490
 491         'highlight' => {
 492                 'sub' => sub { feature_bool('highlight', @_) },
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable displaying of remote heads in the heads list
 497
 498         # To enable system wide have in $GITWEB_CONFIG
 499         # $feature{'remote_heads'}{'default'} = [1];
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'remote_heads'}{'override'} = 1;
 502         # and in project config gitweb.remote_heads = 0|1;
 503         'remote_heads' => {
 504                 'sub' => sub { feature_bool('remote_heads', @_) },
 505                 'override' => 0,
 506                 'default' => [0]},
 507 );
 508
 509 sub gitweb_get_feature {
 510         my ($name) = @_;
 511         return unless exists $feature{$name};
 512         my ($sub, $override, @defaults) = (
 513                 $feature{$name}{'sub'},
 514                 $feature{$name}{'override'},
 515                 @{$feature{$name}{'default'}});
 516         # project specific override is possible only if we have project
 517         our $git_dir; # global variable, declared later
 518         if (!$override || !defined $git_dir) {
 519                 return @defaults;
 520         }
 521         if (!defined $sub) {
 522                 warn "feature $name is not overridable";
 523                 return @defaults;
 524         }
 525         return $sub->(@defaults);
 526 }
 527
 528 # A wrapper to check if a given feature is enabled.
 529 # With this, you can say
 530 #
 531 #   my $bool_feat = gitweb_check_feature('bool_feat');
 532 #   gitweb_check_feature('bool_feat') or somecode;
 533 #
 534 # instead of
 535 #
 536 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 537 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 538 #
 539 sub gitweb_check_feature {
 540         return (gitweb_get_feature(@_))[0];
 541 }
 542
 543
 544 sub feature_bool {
 545         my $key = shift;
 546         my ($val) = git_get_project_config($key, '--bool');
 547
 548         if (!defined $val) {
 549                 return ($_[0]);
 550         } elsif ($val eq 'true') {
 551                 return (1);
 552         } elsif ($val eq 'false') {
 553                 return (0);
 554         }
 555 }
 556
 557 sub feature_snapshot {
 558         my (@fmts) = @_;
 559
 560         my ($val) = git_get_project_config('snapshot');
 561
 562         if ($val) {
 563                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 564         }
 565
 566         return @fmts;
 567 }
 568
 569 sub feature_patches {
 570         my @val = (git_get_project_config('patches', '--int'));
 571
 572         if (@val) {
 573                 return @val;
 574         }
 575
 576         return ($_[0]);
 577 }
 578
 579 sub feature_avatar {
 580         my @val = (git_get_project_config('avatar'));
 581
 582         return @val ? @val : @_;
 583 }
 584
 585 # checking HEAD file with -e is fragile if the repository was
 586 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 587 # and then pruned.
 588 sub check_head_link {
 589         my ($dir) = @_;
 590         my $headfile = "$dir/HEAD";
 591         return ((-e $headfile) ||
 592                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 593 }
 594
 595 sub check_export_ok {
 596         my ($dir) = @_;
 597         return (check_head_link($dir) &&
 598                 (!$export_ok || -e "$dir/$export_ok") &&
 599                 (!$export_auth_hook || $export_auth_hook->($dir)));
 600 }
 601
 602 # process alternate names for backward compatibility
 603 # filter out unsupported (unknown) snapshot formats
 604 sub filter_snapshot_fmts {
 605         my @fmts = @_;
 606
 607         @fmts = map {
 608                 exists $known_snapshot_format_aliases{$_} ?
 609                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 610         @fmts = grep {
 611                 exists $known_snapshot_formats{$_} &&
 612                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 613 }
 614
 615 # If it is set to code reference, it is code that it is to be run once per
 616 # request, allowing updating configurations that change with each request,
 617 # while running other code in config file only once.
 618 #
 619 # Otherwise, if it is false then gitweb would process config file only once;
 620 # if it is true then gitweb config would be run for each request.
 621 our $per_request_config = 1;
 622
 623 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 624 sub evaluate_gitweb_config {
 625         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 626         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 627         # die if there are errors parsing config file
 628         if (-e $GITWEB_CONFIG) {
 629                 do $GITWEB_CONFIG;
 630                 die $@ if $@;
 631         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 632                 do $GITWEB_CONFIG_SYSTEM;
 633                 die $@ if $@;
 634         }
 635 }
 636
 637 # Get loadavg of system, to compare against $maxload.
 638 # Currently it requires '/proc/loadavg' present to get loadavg;
 639 # if it is not present it returns 0, which means no load checking.
 640 sub get_loadavg {
 641         if( -e '/proc/loadavg' ){
 642                 open my $fd, '<', '/proc/loadavg'
 643                         or return 0;
 644                 my @load = split(/\s+/, scalar <$fd>);
 645                 close $fd;
 646
 647                 # The first three columns measure CPU and IO utilization of the last one,
 648                 # five, and 10 minute periods.  The fourth column shows the number of
 649                 # currently running processes and the total number of processes in the m/n
 650                 # format.  The last column displays the last process ID used.
 651                 return $load[0] || 0;
 652         }
 653         # additional checks for load average should go here for things that don't export
 654         # /proc/loadavg
 655
 656         return 0;
 657 }
 658
 659 # version of the core git binary
 660 our $git_version;
 661 sub evaluate_git_version {
 662         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 663         $number_of_git_cmds++;
 664 }
 665
 666 sub check_loadavg {
 667         if (defined $maxload && get_loadavg() > $maxload) {
 668                 die_error(503, "The load average on the server is too high");
 669         }
 670 }
 671
 672 # ======================================================================
 673 # input validation and dispatch
 674
 675 # input parameters can be collected from a variety of sources (presently, CGI
 676 # and PATH_INFO), so we define an %input_params hash that collects them all
 677 # together during validation: this allows subsequent uses (e.g. href()) to be
 678 # agnostic of the parameter origin
 679
 680 our %input_params = ();
 681
 682 # input parameters are stored with the long parameter name as key. This will
 683 # also be used in the href subroutine to convert parameters to their CGI
 684 # equivalent, and since the href() usage is the most frequent one, we store
 685 # the name -> CGI key mapping here, instead of the reverse.
 686 #
 687 # XXX: Warning: If you touch this, check the search form for updating,
 688 # too.
 689
 690 our @cgi_param_mapping = (
 691         project => "p",
 692         action => "a",
 693         file_name => "f",
 694         file_parent => "fp",
 695         hash => "h",
 696         hash_parent => "hp",
 697         hash_base => "hb",
 698         hash_parent_base => "hpb",
 699         page => "pg",
 700         order => "o",
 701         searchtext => "s",
 702         searchtype => "st",
 703         snapshot_format => "sf",
 704         extra_options => "opt",
 705         search_use_regexp => "sr",
 706         # this must be last entry (for manipulation from JavaScript)
 707         javascript => "js"
 708 );
 709 our %cgi_param_mapping = @cgi_param_mapping;
 710
 711 # we will also need to know the possible actions, for validation
 712 our %actions = (
 713         "blame" => \&git_blame,
 714         "blame_incremental" => \&git_blame_incremental,
 715         "blame_data" => \&git_blame_data,
 716         "blobdiff" => \&git_blobdiff,
 717         "blobdiff_plain" => \&git_blobdiff_plain,
 718         "blob" => \&git_blob,
 719         "blob_plain" => \&git_blob_plain,
 720         "commitdiff" => \&git_commitdiff,
 721         "commitdiff_plain" => \&git_commitdiff_plain,
 722         "commit" => \&git_commit,
 723         "forks" => \&git_forks,
 724         "heads" => \&git_heads,
 725         "history" => \&git_history,
 726         "log" => \&git_log,
 727         "patch" => \&git_patch,
 728         "patches" => \&git_patches,
 729         "remotes" => \&git_remotes,
 730         "rss" => \&git_rss,
 731         "atom" => \&git_atom,
 732         "search" => \&git_search,
 733         "search_help" => \&git_search_help,
 734         "shortlog" => \&git_shortlog,
 735         "summary" => \&git_summary,
 736         "tag" => \&git_tag,
 737         "tags" => \&git_tags,
 738         "tree" => \&git_tree,
 739         "snapshot" => \&git_snapshot,
 740         "object" => \&git_object,
 741         # those below don't need $project
 742         "opml" => \&git_opml,
 743         "project_list" => \&git_project_list,
 744         "project_index" => \&git_project_index,
 745 );
 746
 747 # finally, we have the hash of allowed extra_options for the commands that
 748 # allow them
 749 our %allowed_options = (
 750         "--no-merges" => [ qw(rss atom log shortlog history) ],
 751 );
 752
 753 # fill %input_params with the CGI parameters. All values except for 'opt'
 754 # should be single values, but opt can be an array. We should probably
 755 # build an array of parameters that can be multi-valued, but since for the time
 756 # being it's only this one, we just single it out
 757 sub evaluate_query_params {
 758         our $cgi;
 759
 760         while (my ($name, $symbol) = each %cgi_param_mapping) {
 761                 if ($symbol eq 'opt') {
 762                         $input_params{$name} = [ $cgi->param($symbol) ];
 763                 } else {
 764                         $input_params{$name} = $cgi->param($symbol);
 765                 }
 766         }
 767 }
 768
 769 # now read PATH_INFO and update the parameter list for missing parameters
 770 sub evaluate_path_info {
 771         return if defined $input_params{'project'};
 772         return if !$path_info;
 773         $path_info =~ s,^/+,,;
 774         return if !$path_info;
 775
 776         # find which part of PATH_INFO is project
 777         my $project = $path_info;
 778         $project =~ s,/+$,,;
 779         while ($project && !check_head_link("$projectroot/$project")) {
 780                 $project =~ s,/*[^/]*$,,;
 781         }
 782         return unless $project;
 783         $input_params{'project'} = $project;
 784
 785         # do not change any parameters if an action is given using the query string
 786         return if $input_params{'action'};
 787         $path_info =~ s,^\Q$project\E/*,,;
 788
 789         # next, check if we have an action
 790         my $action = $path_info;
 791         $action =~ s,/.*$,,;
 792         if (exists $actions{$action}) {
 793                 $path_info =~ s,^$action/*,,;
 794                 $input_params{'action'} = $action;
 795         }
 796
 797         # list of actions that want hash_base instead of hash, but can have no
 798         # pathname (f) parameter
 799         my @wants_base = (
 800                 'tree',
 801                 'history',
 802         );
 803
 804         # we want to catch, among others
 805         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 806         my ($parentrefname, $parentpathname, $refname, $pathname) =
 807                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 808
 809         # first, analyze the 'current' part
 810         if (defined $pathname) {
 811                 # we got "branch:filename" or "branch:dir/"
 812                 # we could use git_get_type(branch:pathname), but:
 813                 # - it needs $git_dir
 814                 # - it does a git() call
 815                 # - the convention of terminating directories with a slash
 816                 #   makes it superfluous
 817                 # - embedding the action in the PATH_INFO would make it even
 818                 #   more superfluous
 819                 $pathname =~ s,^/+,,;
 820                 if (!$pathname || substr($pathname, -1) eq "/") {
 821                         $input_params{'action'} ||= "tree";
 822                         $pathname =~ s,/$,,;
 823                 } else {
 824                         # the default action depends on whether we had parent info
 825                         # or not
 826                         if ($parentrefname) {
 827                                 $input_params{'action'} ||= "blobdiff_plain";
 828                         } else {
 829                                 $input_params{'action'} ||= "blob_plain";
 830                         }
 831                 }
 832                 $input_params{'hash_base'} ||= $refname;
 833                 $input_params{'file_name'} ||= $pathname;
 834         } elsif (defined $refname) {
 835                 # we got "branch". In this case we have to choose if we have to
 836                 # set hash or hash_base.
 837                 #
 838                 # Most of the actions without a pathname only want hash to be
 839                 # set, except for the ones specified in @wants_base that want
 840                 # hash_base instead. It should also be noted that hand-crafted
 841                 # links having 'history' as an action and no pathname or hash
 842                 # set will fail, but that happens regardless of PATH_INFO.
 843                 if (defined $parentrefname) {
 844                         # if there is parent let the default be 'shortlog' action
 845                         # (for http://git.example.com/repo.git/A..B links); if there
 846                         # is no parent, dispatch will detect type of object and set
 847                         # action appropriately if required (if action is not set)
 848                         $input_params{'action'} ||= "shortlog";
 849                 }
 850                 if ($input_params{'action'} &&
 851                     grep { $_ eq $input_params{'action'} } @wants_base) {
 852                         $input_params{'hash_base'} ||= $refname;
 853                 } else {
 854                         $input_params{'hash'} ||= $refname;
 855                 }
 856         }
 857
 858         # next, handle the 'parent' part, if present
 859         if (defined $parentrefname) {
 860                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 861                 # someproject/blobdiff/oldrev..newrev:/filename
 862                 if ($parentpathname) {
 863                         $parentpathname =~ s,^/+,,;
 864                         $parentpathname =~ s,/$,,;
 865                         $input_params{'file_parent'} ||= $parentpathname;
 866                 } else {
 867                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 868                 }
 869                 # we assume that hash_parent_base is wanted if a path was specified,
 870                 # or if the action wants hash_base instead of hash
 871                 if (defined $input_params{'file_parent'} ||
 872                         grep { $_ eq $input_params{'action'} } @wants_base) {
 873                         $input_params{'hash_parent_base'} ||= $parentrefname;
 874                 } else {
 875                         $input_params{'hash_parent'} ||= $parentrefname;
 876                 }
 877         }
 878
 879         # for the snapshot action, we allow URLs in the form
 880         # $project/snapshot/$hash.ext
 881         # where .ext determines the snapshot and gets removed from the
 882         # passed $refname to provide the $hash.
 883         #
 884         # To be able to tell that $refname includes the format extension, we
 885         # require the following two conditions to be satisfied:
 886         # - the hash input parameter MUST have been set from the $refname part
 887         #   of the URL (i.e. they must be equal)
 888         # - the snapshot format MUST NOT have been defined already (e.g. from
 889         #   CGI parameter sf)
 890         # It's also useless to try any matching unless $refname has a dot,
 891         # so we check for that too
 892         if (defined $input_params{'action'} &&
 893                 $input_params{'action'} eq 'snapshot' &&
 894                 defined $refname && index($refname, '.') != -1 &&
 895                 $refname eq $input_params{'hash'} &&
 896                 !defined $input_params{'snapshot_format'}) {
 897                 # We loop over the known snapshot formats, checking for
 898                 # extensions. Allowed extensions are both the defined suffix
 899                 # (which includes the initial dot already) and the snapshot
 900                 # format key itself, with a prepended dot
 901                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 902                         my $hash = $refname;
 903                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 904                                 next;
 905                         }
 906                         my $sfx = $1;
 907                         # a valid suffix was found, so set the snapshot format
 908                         # and reset the hash parameter
 909                         $input_params{'snapshot_format'} = $fmt;
 910                         $input_params{'hash'} = $hash;
 911                         # we also set the format suffix to the one requested
 912                         # in the URL: this way a request for e.g. .tgz returns
 913                         # a .tgz instead of a .tar.gz
 914                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 915                         last;
 916                 }
 917         }
 918 }
 919
 920 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 921      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 922      $searchtext, $search_regexp);
 923 sub evaluate_and_validate_params {
 924         our $action = $input_params{'action'};
 925         if (defined $action) {
 926                 if (!validate_action($action)) {
 927                         die_error(400, "Invalid action parameter");
 928                 }
 929         }
 930
 931         # parameters which are pathnames
 932         our $project = $input_params{'project'};
 933         if (defined $project) {
 934                 if (!validate_project($project)) {
 935                         undef $project;
 936                         die_error(404, "No such project");
 937                 }
 938         }
 939
 940         our $file_name = $input_params{'file_name'};
 941         if (defined $file_name) {
 942                 if (!validate_pathname($file_name)) {
 943                         die_error(400, "Invalid file parameter");
 944                 }
 945         }
 946
 947         our $file_parent = $input_params{'file_parent'};
 948         if (defined $file_parent) {
 949                 if (!validate_pathname($file_parent)) {
 950                         die_error(400, "Invalid file parent parameter");
 951                 }
 952         }
 953
 954         # parameters which are refnames
 955         our $hash = $input_params{'hash'};
 956         if (defined $hash) {
 957                 if (!validate_refname($hash)) {
 958                         die_error(400, "Invalid hash parameter");
 959                 }
 960         }
 961
 962         our $hash_parent = $input_params{'hash_parent'};
 963         if (defined $hash_parent) {
 964                 if (!validate_refname($hash_parent)) {
 965                         die_error(400, "Invalid hash parent parameter");
 966                 }
 967         }
 968
 969         our $hash_base = $input_params{'hash_base'};
 970         if (defined $hash_base) {
 971                 if (!validate_refname($hash_base)) {
 972                         die_error(400, "Invalid hash base parameter");
 973                 }
 974         }
 975
 976         our @extra_options = @{$input_params{'extra_options'}};
 977         # @extra_options is always defined, since it can only be (currently) set from
 978         # CGI, and $cgi->param() returns the empty array in array context if the param
 979         # is not set
 980         foreach my $opt (@extra_options) {
 981                 if (not exists $allowed_options{$opt}) {
 982                         die_error(400, "Invalid option parameter");
 983                 }
 984                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 985                         die_error(400, "Invalid option parameter for this action");
 986                 }
 987         }
 988
 989         our $hash_parent_base = $input_params{'hash_parent_base'};
 990         if (defined $hash_parent_base) {
 991                 if (!validate_refname($hash_parent_base)) {
 992                         die_error(400, "Invalid hash parent base parameter");
 993                 }
 994         }
 995
 996         # other parameters
 997         our $page = $input_params{'page'};
 998         if (defined $page) {
 999                 if ($page =~ m/[^0-9]/) {
1000                         die_error(400, "Invalid page parameter");
1001                 }
1002         }
1003
1004         our $searchtype = $input_params{'searchtype'};
1005         if (defined $searchtype) {
1006                 if ($searchtype =~ m/[^a-z]/) {
1007                         die_error(400, "Invalid searchtype parameter");
1008                 }
1009         }
1010
1011         our $search_use_regexp = $input_params{'search_use_regexp'};
1012
1013         our $searchtext = $input_params{'searchtext'};
1014         our $search_regexp;
1015         if (defined $searchtext) {
1016                 if (length($searchtext) < 2) {
1017                         die_error(403, "At least two characters are required for search parameter");
1018                 }
1019                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1020         }
1021 }
1022
1023 # path to the current git repository
1024 our $git_dir;
1025 sub evaluate_git_dir {
1026         our $git_dir = "$projectroot/$project" if $project;
1027 }
1028
1029 our (@snapshot_fmts, $git_avatar);
1030 sub configure_gitweb_features {
1031         # list of supported snapshot formats
1032         our @snapshot_fmts = gitweb_get_feature('snapshot');
1033         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1034
1035         # check that the avatar feature is set to a known provider name,
1036         # and for each provider check if the dependencies are satisfied.
1037         # if the provider name is invalid or the dependencies are not met,
1038         # reset $git_avatar to the empty string.
1039         our ($git_avatar) = gitweb_get_feature('avatar');
1040         if ($git_avatar eq 'gravatar') {
1041                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1042         } elsif ($git_avatar eq 'picon') {
1043                 # no dependencies
1044         } else {
1045                 $git_avatar = '';
1046         }
1047 }
1048
1049 # custom error handler: 'die <message>' is Internal Server Error
1050 sub handle_errors_html {
1051         my $msg = shift; # it is already HTML escaped
1052
1053         # to avoid infinite loop where error occurs in die_error,
1054         # change handler to default handler, disabling handle_errors_html
1055         set_message("Error occured when inside die_error:\n$msg");
1056
1057         # you cannot jump out of die_error when called as error handler;
1058         # the subroutine set via CGI::Carp::set_message is called _after_
1059         # HTTP headers are already written, so it cannot write them itself
1060         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1061 }
1062 set_message(\&handle_errors_html);
1063
1064 # dispatch
1065 sub dispatch {
1066         if (!defined $action) {
1067                 if (defined $hash) {
1068                         $action = git_get_type($hash);
1069                 } elsif (defined $hash_base && defined $file_name) {
1070                         $action = git_get_type("$hash_base:$file_name");
1071                 } elsif (defined $project) {
1072                         $action = 'summary';
1073                 } else {
1074                         $action = 'project_list';
1075                 }
1076         }
1077         if (!defined($actions{$action})) {
1078                 die_error(400, "Unknown action");
1079         }
1080         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1081             !$project) {
1082                 die_error(400, "Project needed");
1083         }
1084         $actions{$action}->();
1085 }
1086
1087 sub reset_timer {
1088         our $t0 = [ gettimeofday() ]
1089                 if defined $t0;
1090         our $number_of_git_cmds = 0;
1091 }
1092
1093 our $first_request = 1;
1094 sub run_request {
1095         reset_timer();
1096
1097         evaluate_uri();
1098         if ($first_request) {
1099                 evaluate_gitweb_config();
1100                 evaluate_git_version();
1101         }
1102         if ($per_request_config) {
1103                 if (ref($per_request_config) eq 'CODE') {
1104                         $per_request_config->();
1105                 } elsif (!$first_request) {
1106                         evaluate_gitweb_config();
1107                 }
1108         }
1109         check_loadavg();
1110
1111         # $projectroot and $projects_list might be set in gitweb config file
1112         $projects_list ||= $projectroot;
1113
1114         evaluate_query_params();
1115         evaluate_path_info();
1116         evaluate_and_validate_params();
1117         evaluate_git_dir();
1118
1119         configure_gitweb_features();
1120
1121         dispatch();
1122 }
1123
1124 our $is_last_request = sub { 1 };
1125 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1126 our $CGI = 'CGI';
1127 our $cgi;
1128 sub configure_as_fcgi {
1129         require CGI::Fast;
1130         our $CGI = 'CGI::Fast';
1131
1132         my $request_number = 0;
1133         # let each child service 100 requests
1134         our $is_last_request = sub { ++$request_number > 100 };
1135 }
1136 sub evaluate_argv {
1137         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1138         configure_as_fcgi()
1139                 if $script_name =~ /\.fcgi$/;
1140
1141         return unless (@ARGV);
1142
1143         require Getopt::Long;
1144         Getopt::Long::GetOptions(
1145                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1146                 'nproc|n=i' => sub {
1147                         my ($arg, $val) = @_;
1148                         return unless eval { require FCGI::ProcManager; 1; };
1149                         my $proc_manager = FCGI::ProcManager->new({
1150                                 n_processes => $val,
1151                         });
1152                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1153                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1154                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1155                 },
1156         );
1157 }
1158
1159 sub run {
1160         evaluate_argv();
1161
1162         $first_request = 1;
1163         $pre_listen_hook->()
1164                 if $pre_listen_hook;
1165
1166  REQUEST:
1167         while ($cgi = $CGI->new()) {
1168                 $pre_dispatch_hook->()
1169                         if $pre_dispatch_hook;
1170
1171                 run_request();
1172
1173                 $post_dispatch_hook->()
1174                         if $post_dispatch_hook;
1175                 $first_request = 0;
1176
1177                 last REQUEST if ($is_last_request->());
1178         }
1179
1180  DONE_GITWEB:
1181         1;
1182 }
1183
1184 run();
1185
1186 if (defined caller) {
1187         # wrapped in a subroutine processing requests,
1188         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1189         return;
1190 } else {
1191         # pure CGI script, serving single request
1192         exit;
1193 }
1194
1195 ## ======================================================================
1196 ## action links
1197
1198 # possible values of extra options
1199 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1200 # -replay => 1      - start from a current view (replay with modifications)
1201 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1202 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1203 sub href {
1204         my %params = @_;
1205         # default is to use -absolute url() i.e. $my_uri
1206         my $href = $params{-full} ? $my_url : $my_uri;
1207
1208         # implicit -replay, must be first of implicit params
1209         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1210
1211         $params{'project'} = $project unless exists $params{'project'};
1212
1213         if ($params{-replay}) {
1214                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1215                         if (!exists $params{$name}) {
1216                                 $params{$name} = $input_params{$name};
1217                         }
1218                 }
1219         }
1220
1221         my $use_pathinfo = gitweb_check_feature('pathinfo');
1222         if (defined $params{'project'} &&
1223             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1224                 # try to put as many parameters as possible in PATH_INFO:
1225                 #   - project name
1226                 #   - action
1227                 #   - hash_parent or hash_parent_base:/file_parent
1228                 #   - hash or hash_base:/filename
1229                 #   - the snapshot_format as an appropriate suffix
1230
1231                 # When the script is the root DirectoryIndex for the domain,
1232                 # $href here would be something like http://gitweb.example.com/
1233                 # Thus, we strip any trailing / from $href, to spare us double
1234                 # slashes in the final URL
1235                 $href =~ s,/$,,;
1236
1237                 # Then add the project name, if present
1238                 $href .= "/".esc_path_info($params{'project'});
1239                 delete $params{'project'};
1240
1241                 # since we destructively absorb parameters, we keep this
1242                 # boolean that remembers if we're handling a snapshot
1243                 my $is_snapshot = $params{'action'} eq 'snapshot';
1244
1245                 # Summary just uses the project path URL, any other action is
1246                 # added to the URL
1247                 if (defined $params{'action'}) {
1248                         $href .= "/".esc_path_info($params{'action'})
1249                                 unless $params{'action'} eq 'summary';
1250                         delete $params{'action'};
1251                 }
1252
1253                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1254                 # stripping nonexistent or useless pieces
1255                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1256                         || $params{'hash_parent'} || $params{'hash'});
1257                 if (defined $params{'hash_base'}) {
1258                         if (defined $params{'hash_parent_base'}) {
1259                                 $href .= esc_path_info($params{'hash_parent_base'});
1260                                 # skip the file_parent if it's the same as the file_name
1261                                 if (defined $params{'file_parent'}) {
1262                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1263                                                 delete $params{'file_parent'};
1264                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1265                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1266                                                 delete $params{'file_parent'};
1267                                         }
1268                                 }
1269                                 $href .= "..";
1270                                 delete $params{'hash_parent'};
1271                                 delete $params{'hash_parent_base'};
1272                         } elsif (defined $params{'hash_parent'}) {
1273                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1274                                 delete $params{'hash_parent'};
1275                         }
1276
1277                         $href .= esc_path_info($params{'hash_base'});
1278                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1279                                 $href .= ":/".esc_path_info($params{'file_name'});
1280                                 delete $params{'file_name'};
1281                         }
1282                         delete $params{'hash'};
1283                         delete $params{'hash_base'};
1284                 } elsif (defined $params{'hash'}) {
1285                         $href .= esc_path_info($params{'hash'});
1286                         delete $params{'hash'};
1287                 }
1288
1289                 # If the action was a snapshot, we can absorb the
1290                 # snapshot_format parameter too
1291                 if ($is_snapshot) {
1292                         my $fmt = $params{'snapshot_format'};
1293                         # snapshot_format should always be defined when href()
1294                         # is called, but just in case some code forgets, we
1295                         # fall back to the default
1296                         $fmt ||= $snapshot_fmts[0];
1297                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1298                         delete $params{'snapshot_format'};
1299                 }
1300         }
1301
1302         # now encode the parameters explicitly
1303         my @result = ();
1304         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1305                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1306                 if (defined $params{$name}) {
1307                         if (ref($params{$name}) eq "ARRAY") {
1308                                 foreach my $par (@{$params{$name}}) {
1309                                         push @result, $symbol . "=" . esc_param($par);
1310                                 }
1311                         } else {
1312                                 push @result, $symbol . "=" . esc_param($params{$name});
1313                         }
1314                 }
1315         }
1316         $href .= "?" . join(';', @result) if scalar @result;
1317
1318         # final transformation: trailing spaces must be escaped (URI-encoded)
1319         $href =~ s/(\s+)$/CGI::escape($1)/e;
1320
1321         if ($params{-anchor}) {
1322                 $href .= "#".esc_param($params{-anchor});
1323         }
1324
1325         return $href;
1326 }
1327
1328
1329 ## ======================================================================
1330 ## validation, quoting/unquoting and escaping
1331
1332 sub validate_action {
1333         my $input = shift || return undef;
1334         return undef unless exists $actions{$input};
1335         return $input;
1336 }
1337
1338 sub validate_project {
1339         my $input = shift || return undef;
1340         if (!validate_pathname($input) ||
1341                 !(-d "$projectroot/$input") ||
1342                 !check_export_ok("$projectroot/$input") ||
1343                 ($strict_export && !project_in_list($input))) {
1344                 return undef;
1345         } else {
1346                 return $input;
1347         }
1348 }
1349
1350 sub validate_pathname {
1351         my $input = shift || return undef;
1352
1353         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1354         # at the beginning, at the end, and between slashes.
1355         # also this catches doubled slashes
1356         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1357                 return undef;
1358         }
1359         # no null characters
1360         if ($input =~ m!\0!) {
1361                 return undef;
1362         }
1363         return $input;
1364 }
1365
1366 sub validate_refname {
1367         my $input = shift || return undef;
1368
1369         # textual hashes are O.K.
1370         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1371                 return $input;
1372         }
1373         # it must be correct pathname
1374         $input = validate_pathname($input)
1375                 or return undef;
1376         # restrictions on ref name according to git-check-ref-format
1377         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1378                 return undef;
1379         }
1380         return $input;
1381 }
1382
1383 # decode sequences of octets in utf8 into Perl's internal form,
1384 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1385 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1386 sub to_utf8 {
1387         my $str = shift;
1388         return undef unless defined $str;
1389         if (utf8::valid($str)) {
1390                 utf8::decode($str);
1391                 return $str;
1392         } else {
1393                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1394         }
1395 }
1396
1397 # quote unsafe chars, but keep the slash, even when it's not
1398 # correct, but quoted slashes look too horrible in bookmarks
1399 sub esc_param {
1400         my $str = shift;
1401         return undef unless defined $str;
1402         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1403         $str =~ s/ /\+/g;
1404         return $str;
1405 }
1406
1407 # the quoting rules for path_info fragment are slightly different
1408 sub esc_path_info {
1409         my $str = shift;
1410         return undef unless defined $str;
1411
1412         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1413         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1414
1415         return $str;
1416 }
1417
1418 # quote unsafe chars in whole URL, so some characters cannot be quoted
1419 sub esc_url {
1420         my $str = shift;
1421         return undef unless defined $str;
1422         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1423         $str =~ s/ /\+/g;
1424         return $str;
1425 }
1426
1427 # quote unsafe characters in HTML attributes
1428 sub esc_attr {
1429
1430         # for XHTML conformance escaping '"' to '&quot;' is not enough
1431         return esc_html(@_);
1432 }
1433
1434 # replace invalid utf8 character with SUBSTITUTION sequence
1435 sub esc_html {
1436         my $str = shift;
1437         my %opts = @_;
1438
1439         return undef unless defined $str;
1440
1441         $str = to_utf8($str);
1442         $str = $cgi->escapeHTML($str);
1443         if ($opts{'-nbsp'}) {
1444                 $str =~ s/ /&nbsp;/g;
1445         }
1446         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1447         return $str;
1448 }
1449
1450 # quote control characters and escape filename to HTML
1451 sub esc_path {
1452         my $str = shift;
1453         my %opts = @_;
1454
1455         return undef unless defined $str;
1456
1457         $str = to_utf8($str);
1458         $str = $cgi->escapeHTML($str);
1459         if ($opts{'-nbsp'}) {
1460                 $str =~ s/ /&nbsp;/g;
1461         }
1462         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1463         return $str;
1464 }
1465
1466 # Make control characters "printable", using character escape codes (CEC)
1467 sub quot_cec {
1468         my $cntrl = shift;
1469         my %opts = @_;
1470         my %es = ( # character escape codes, aka escape sequences
1471                 "\t" => '\t',   # tab            (HT)
1472                 "\n" => '\n',   # line feed      (LF)
1473                 "\r" => '\r',   # carrige return (CR)
1474                 "\f" => '\f',   # form feed      (FF)
1475                 "\b" => '\b',   # backspace      (BS)
1476                 "\a" => '\a',   # alarm (bell)   (BEL)
1477                 "\e" => '\e',   # escape         (ESC)
1478                 "\013" => '\v', # vertical tab   (VT)
1479                 "\000" => '\0', # nul character  (NUL)
1480         );
1481         my $chr = ( (exists $es{$cntrl})
1482                     ? $es{$cntrl}
1483                     : sprintf('\%2x', ord($cntrl)) );
1484         if ($opts{-nohtml}) {
1485                 return $chr;
1486         } else {
1487                 return "<span class=\"cntrl\">$chr</span>";
1488         }
1489 }
1490
1491 # Alternatively use unicode control pictures codepoints,
1492 # Unicode "printable representation" (PR)
1493 sub quot_upr {
1494         my $cntrl = shift;
1495         my %opts = @_;
1496
1497         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1498         if ($opts{-nohtml}) {
1499                 return $chr;
1500         } else {
1501                 return "<span class=\"cntrl\">$chr</span>";
1502         }
1503 }
1504
1505 # git may return quoted and escaped filenames
1506 sub unquote {
1507         my $str = shift;
1508
1509         sub unq {
1510                 my $seq = shift;
1511                 my %es = ( # character escape codes, aka escape sequences
1512                         't' => "\t",   # tab            (HT, TAB)
1513                         'n' => "\n",   # newline        (NL)
1514                         'r' => "\r",   # return         (CR)
1515                         'f' => "\f",   # form feed      (FF)
1516                         'b' => "\b",   # backspace      (BS)
1517                         'a' => "\a",   # alarm (bell)   (BEL)
1518                         'e' => "\e",   # escape         (ESC)
1519                         'v' => "\013", # vertical tab   (VT)
1520                 );
1521
1522                 if ($seq =~ m/^[0-7]{1,3}$/) {
1523                         # octal char sequence
1524                         return chr(oct($seq));
1525                 } elsif (exists $es{$seq}) {
1526                         # C escape sequence, aka character escape code
1527                         return $es{$seq};
1528                 }
1529                 # quoted ordinary character
1530                 return $seq;
1531         }
1532
1533         if ($str =~ m/^"(.*)"$/) {
1534                 # needs unquoting
1535                 $str = $1;
1536                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1537         }
1538         return $str;
1539 }
1540
1541 # escape tabs (convert tabs to spaces)
1542 sub untabify {
1543         my $line = shift;
1544
1545         while ((my $pos = index($line, "\t")) != -1) {
1546                 if (my $count = (8 - ($pos % 8))) {
1547                         my $spaces = ' ' x $count;
1548                         $line =~ s/\t/$spaces/;
1549                 }
1550         }
1551
1552         return $line;
1553 }
1554
1555 sub project_in_list {
1556         my $project = shift;
1557         my @list = git_get_projects_list();
1558         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1559 }
1560
1561 ## ----------------------------------------------------------------------
1562 ## HTML aware string manipulation
1563
1564 # Try to chop given string on a word boundary between position
1565 # $len and $len+$add_len. If there is no word boundary there,
1566 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1567 # (marking chopped part) would be longer than given string.
1568 sub chop_str {
1569         my $str = shift;
1570         my $len = shift;
1571         my $add_len = shift || 10;
1572         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1573
1574         # Make sure perl knows it is utf8 encoded so we don't
1575         # cut in the middle of a utf8 multibyte char.
1576         $str = to_utf8($str);
1577
1578         # allow only $len chars, but don't cut a word if it would fit in $add_len
1579         # if it doesn't fit, cut it if it's still longer than the dots we would add
1580         # remove chopped character entities entirely
1581
1582         # when chopping in the middle, distribute $len into left and right part
1583         # return early if chopping wouldn't make string shorter
1584         if ($where eq 'center') {
1585                 return $str if ($len + 5 >= length($str)); # filler is length 5
1586                 $len = int($len/2);
1587         } else {
1588                 return $str if ($len + 4 >= length($str)); # filler is length 4
1589         }
1590
1591         # regexps: ending and beginning with word part up to $add_len
1592         my $endre = qr/.{$len}\w{0,$add_len}/;
1593         my $begre = qr/\w{0,$add_len}.{$len}/;
1594
1595         if ($where eq 'left') {
1596                 $str =~ m/^(.*?)($begre)$/;
1597                 my ($lead, $body) = ($1, $2);
1598                 if (length($lead) > 4) {
1599                         $lead = " ...";
1600                 }
1601                 return "$lead$body";
1602
1603         } elsif ($where eq 'center') {
1604                 $str =~ m/^($endre)(.*)$/;
1605                 my ($left, $str)  = ($1, $2);
1606                 $str =~ m/^(.*?)($begre)$/;
1607                 my ($mid, $right) = ($1, $2);
1608                 if (length($mid) > 5) {
1609                         $mid = " ... ";
1610                 }
1611                 return "$left$mid$right";
1612
1613         } else {
1614                 $str =~ m/^($endre)(.*)$/;
1615                 my $body = $1;
1616                 my $tail = $2;
1617                 if (length($tail) > 4) {
1618                         $tail = "... ";
1619                 }
1620                 return "$body$tail";
1621         }
1622 }
1623
1624 # takes the same arguments as chop_str, but also wraps a <span> around the
1625 # result with a title attribute if it does get chopped. Additionally, the
1626 # string is HTML-escaped.
1627 sub chop_and_escape_str {
1628         my ($str) = @_;
1629
1630         my $chopped = chop_str(@_);
1631         if ($chopped eq $str) {
1632                 return esc_html($chopped);
1633         } else {
1634                 $str =~ s/[[:cntrl:]]/?/g;
1635                 return $cgi->span({-title=>$str}, esc_html($chopped));
1636         }
1637 }
1638
1639 ## ----------------------------------------------------------------------
1640 ## functions returning short strings
1641
1642 # CSS class for given age value (in seconds)
1643 sub age_class {
1644         my $age = shift;
1645
1646         if (!defined $age) {
1647                 return "noage";
1648         } elsif ($age < 60*60*2) {
1649                 return "age0";
1650         } elsif ($age < 60*60*24*2) {
1651                 return "age1";
1652         } else {
1653                 return "age2";
1654         }
1655 }
1656
1657 # convert age in seconds to "nn units ago" string
1658 sub age_string {
1659         my $age = shift;
1660         my $age_str;
1661
1662         if ($age > 60*60*24*365*2) {
1663                 $age_str = (int $age/60/60/24/365);
1664                 $age_str .= " years ago";
1665         } elsif ($age > 60*60*24*(365/12)*2) {
1666                 $age_str = int $age/60/60/24/(365/12);
1667                 $age_str .= " months ago";
1668         } elsif ($age > 60*60*24*7*2) {
1669                 $age_str = int $age/60/60/24/7;
1670                 $age_str .= " weeks ago";
1671         } elsif ($age > 60*60*24*2) {
1672                 $age_str = int $age/60/60/24;
1673                 $age_str .= " days ago";
1674         } elsif ($age > 60*60*2) {
1675                 $age_str = int $age/60/60;
1676                 $age_str .= " hours ago";
1677         } elsif ($age > 60*2) {
1678                 $age_str = int $age/60;
1679                 $age_str .= " min ago";
1680         } elsif ($age > 2) {
1681                 $age_str = int $age;
1682                 $age_str .= " sec ago";
1683         } else {
1684                 $age_str .= " right now";
1685         }
1686         return $age_str;
1687 }
1688
1689 use constant {
1690         S_IFINVALID => 0030000,
1691         S_IFGITLINK => 0160000,
1692 };
1693
1694 # submodule/subproject, a commit object reference
1695 sub S_ISGITLINK {
1696         my $mode = shift;
1697
1698         return (($mode & S_IFMT) == S_IFGITLINK)
1699 }
1700
1701 # convert file mode in octal to symbolic file mode string
1702 sub mode_str {
1703         my $mode = oct shift;
1704
1705         if (S_ISGITLINK($mode)) {
1706                 return 'm---------';
1707         } elsif (S_ISDIR($mode & S_IFMT)) {
1708                 return 'drwxr-xr-x';
1709         } elsif (S_ISLNK($mode)) {
1710                 return 'lrwxrwxrwx';
1711         } elsif (S_ISREG($mode)) {
1712                 # git cares only about the executable bit
1713                 if ($mode & S_IXUSR) {
1714                         return '-rwxr-xr-x';
1715                 } else {
1716                         return '-rw-r--r--';
1717                 };
1718         } else {
1719                 return '----------';
1720         }
1721 }
1722
1723 # convert file mode in octal to file type string
1724 sub file_type {
1725         my $mode = shift;
1726
1727         if ($mode !~ m/^[0-7]+$/) {
1728                 return $mode;
1729         } else {
1730                 $mode = oct $mode;
1731         }
1732
1733         if (S_ISGITLINK($mode)) {
1734                 return "submodule";
1735         } elsif (S_ISDIR($mode & S_IFMT)) {
1736                 return "directory";
1737         } elsif (S_ISLNK($mode)) {
1738                 return "symlink";
1739         } elsif (S_ISREG($mode)) {
1740                 return "file";
1741         } else {
1742                 return "unknown";
1743         }
1744 }
1745
1746 # convert file mode in octal to file type description string
1747 sub file_type_long {
1748         my $mode = shift;
1749
1750         if ($mode !~ m/^[0-7]+$/) {
1751                 return $mode;
1752         } else {
1753                 $mode = oct $mode;
1754         }
1755
1756         if (S_ISGITLINK($mode)) {
1757                 return "submodule";
1758         } elsif (S_ISDIR($mode & S_IFMT)) {
1759                 return "directory";
1760         } elsif (S_ISLNK($mode)) {
1761                 return "symlink";
1762         } elsif (S_ISREG($mode)) {
1763                 if ($mode & S_IXUSR) {
1764                         return "executable";
1765                 } else {
1766                         return "file";
1767                 };
1768         } else {
1769                 return "unknown";
1770         }
1771 }
1772
1773
1774 ## ----------------------------------------------------------------------
1775 ## functions returning short HTML fragments, or transforming HTML fragments
1776 ## which don't belong to other sections
1777
1778 # format line of commit message.
1779 sub format_log_line_html {
1780         my $line = shift;
1781
1782         $line = esc_html($line, -nbsp=>1);
1783         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1784                 $cgi->a({-href => href(action=>"object", hash=>$1),
1785                                         -class => "text"}, $1);
1786         }eg;
1787
1788         return $line;
1789 }
1790
1791 # format marker of refs pointing to given object
1792
1793 # the destination action is chosen based on object type and current context:
1794 # - for annotated tags, we choose the tag view unless it's the current view
1795 #   already, in which case we go to shortlog view
1796 # - for other refs, we keep the current view if we're in history, shortlog or
1797 #   log view, and select shortlog otherwise
1798 sub format_ref_marker {
1799         my ($refs, $id) = @_;
1800         my $markers = '';
1801
1802         if (defined $refs->{$id}) {
1803                 foreach my $ref (@{$refs->{$id}}) {
1804                         # this code exploits the fact that non-lightweight tags are the
1805                         # only indirect objects, and that they are the only objects for which
1806                         # we want to use tag instead of shortlog as action
1807                         my ($type, $name) = qw();
1808                         my $indirect = ($ref =~ s/\^\{\}$//);
1809                         # e.g. tags/v2.6.11 or heads/next
1810                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1811                                 $type = $1;
1812                                 $name = $2;
1813                         } else {
1814                                 $type = "ref";
1815                                 $name = $ref;
1816                         }
1817
1818                         my $class = $type;
1819                         $class .= " indirect" if $indirect;
1820
1821                         my $dest_action = "shortlog";
1822
1823                         if ($indirect) {
1824                                 $dest_action = "tag" unless $action eq "tag";
1825                         } elsif ($action =~ /^(history|(short)?log)$/) {
1826                                 $dest_action = $action;
1827                         }
1828
1829                         my $dest = "";
1830                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1831                         $dest .= $ref;
1832
1833                         my $link = $cgi->a({
1834                                 -href => href(
1835                                         action=>$dest_action,
1836                                         hash=>$dest
1837                                 )}, $name);
1838
1839                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1840                                 $link . "</span>";
1841                 }
1842         }
1843
1844         if ($markers) {
1845                 return ' <span class="refs">'. $markers . '</span>';
1846         } else {
1847                 return "";
1848         }
1849 }
1850
1851 # format, perhaps shortened and with markers, title line
1852 sub format_subject_html {
1853         my ($long, $short, $href, $extra) = @_;
1854         $extra = '' unless defined($extra);
1855
1856         if (length($short) < length($long)) {
1857                 $long =~ s/[[:cntrl:]]/?/g;
1858                 return $cgi->a({-href => $href, -class => "list subject",
1859                                 -title => to_utf8($long)},
1860                        esc_html($short)) . $extra;
1861         } else {
1862                 return $cgi->a({-href => $href, -class => "list subject"},
1863                        esc_html($long)) . $extra;
1864         }
1865 }
1866
1867 # Rather than recomputing the url for an email multiple times, we cache it
1868 # after the first hit. This gives a visible benefit in views where the avatar
1869 # for the same email is used repeatedly (e.g. shortlog).
1870 # The cache is shared by all avatar engines (currently gravatar only), which
1871 # are free to use it as preferred. Since only one avatar engine is used for any
1872 # given page, there's no risk for cache conflicts.
1873 our %avatar_cache = ();
1874
1875 # Compute the picon url for a given email, by using the picon search service over at
1876 # http://www.cs.indiana.edu/picons/search.html
1877 sub picon_url {
1878         my $email = lc shift;
1879         if (!$avatar_cache{$email}) {
1880                 my ($user, $domain) = split('@', $email);
1881                 $avatar_cache{$email} =
1882                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1883                         "$domain/$user/" .
1884                         "users+domains+unknown/up/single";
1885         }
1886         return $avatar_cache{$email};
1887 }
1888
1889 # Compute the gravatar url for a given email, if it's not in the cache already.
1890 # Gravatar stores only the part of the URL before the size, since that's the
1891 # one computationally more expensive. This also allows reuse of the cache for
1892 # different sizes (for this particular engine).
1893 sub gravatar_url {
1894         my $email = lc shift;
1895         my $size = shift;
1896         $avatar_cache{$email} ||=
1897                 "http://www.gravatar.com/avatar/" .
1898                         Digest::MD5::md5_hex($email) . "?s=";
1899         return $avatar_cache{$email} . $size;
1900 }
1901
1902 # Insert an avatar for the given $email at the given $size if the feature
1903 # is enabled.
1904 sub git_get_avatar {
1905         my ($email, %opts) = @_;
1906         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1907         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1908         $opts{-size} ||= 'default';
1909         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1910         my $url = "";
1911         if ($git_avatar eq 'gravatar') {
1912                 $url = gravatar_url($email, $size);
1913         } elsif ($git_avatar eq 'picon') {
1914                 $url = picon_url($email);
1915         }
1916         # Other providers can be added by extending the if chain, defining $url
1917         # as needed. If no variant puts something in $url, we assume avatars
1918         # are completely disabled/unavailable.
1919         if ($url) {
1920                 return $pre_white .
1921                        "<img width=\"$size\" " .
1922                             "class=\"avatar\" " .
1923                             "src=\"".esc_url($url)."\" " .
1924                             "alt=\"\" " .
1925                        "/>" . $post_white;
1926         } else {
1927                 return "";
1928         }
1929 }
1930
1931 sub format_search_author {
1932         my ($author, $searchtype, $displaytext) = @_;
1933         my $have_search = gitweb_check_feature('search');
1934
1935         if ($have_search) {
1936                 my $performed = "";
1937                 if ($searchtype eq 'author') {
1938                         $performed = "authored";
1939                 } elsif ($searchtype eq 'committer') {
1940                         $performed = "committed";
1941                 }
1942
1943                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1944                                 searchtext=>$author,
1945                                 searchtype=>$searchtype), class=>"list",
1946                                 title=>"Search for commits $performed by $author"},
1947                                 $displaytext);
1948
1949         } else {
1950                 return $displaytext;
1951         }
1952 }
1953
1954 # format the author name of the given commit with the given tag
1955 # the author name is chopped and escaped according to the other
1956 # optional parameters (see chop_str).
1957 sub format_author_html {
1958         my $tag = shift;
1959         my $co = shift;
1960         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1961         return "<$tag class=\"author\">" .
1962                format_search_author($co->{'author_name'}, "author",
1963                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1964                        $author) .
1965                "</$tag>";
1966 }
1967
1968 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1969 sub format_git_diff_header_line {
1970         my $line = shift;
1971         my $diffinfo = shift;
1972         my ($from, $to) = @_;
1973
1974         if ($diffinfo->{'nparents'}) {
1975                 # combined diff
1976                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1977                 if ($to->{'href'}) {
1978                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1979                                          esc_path($to->{'file'}));
1980                 } else { # file was deleted (no href)
1981                         $line .= esc_path($to->{'file'});
1982                 }
1983         } else {
1984                 # "ordinary" diff
1985                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1986                 if ($from->{'href'}) {
1987                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1988                                          'a/' . esc_path($from->{'file'}));
1989                 } else { # file was added (no href)
1990                         $line .= 'a/' . esc_path($from->{'file'});
1991                 }
1992                 $line .= ' ';
1993                 if ($to->{'href'}) {
1994                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1995                                          'b/' . esc_path($to->{'file'}));
1996                 } else { # file was deleted
1997                         $line .= 'b/' . esc_path($to->{'file'});
1998                 }
1999         }
2000
2001         return "<div class=\"diff header\">$line</div>\n";
2002 }
2003
2004 # format extended diff header line, before patch itself
2005 sub format_extended_diff_header_line {
2006         my $line = shift;
2007         my $diffinfo = shift;
2008         my ($from, $to) = @_;
2009
2010         # match <path>
2011         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2012                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2013                                        esc_path($from->{'file'}));
2014         }
2015         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2016                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2017                                  esc_path($to->{'file'}));
2018         }
2019         # match single <mode>
2020         if ($line =~ m/\s(\d{6})$/) {
2021                 $line .= '<span class="info"> (' .
2022                          file_type_long($1) .
2023                          ')</span>';
2024         }
2025         # match <hash>
2026         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2027                 # can match only for combined diff
2028                 $line = 'index ';
2029                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2030                         if ($from->{'href'}[$i]) {
2031                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2032                                                   -class=>"hash"},
2033                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2034                         } else {
2035                                 $line .= '0' x 7;
2036                         }
2037                         # separator
2038                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2039                 }
2040                 $line .= '..';
2041                 if ($to->{'href'}) {
2042                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2043                                          substr($diffinfo->{'to_id'},0,7));
2044                 } else {
2045                         $line .= '0' x 7;
2046                 }
2047
2048         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2049                 # can match only for ordinary diff
2050                 my ($from_link, $to_link);
2051                 if ($from->{'href'}) {
2052                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2053                                              substr($diffinfo->{'from_id'},0,7));
2054                 } else {
2055                         $from_link = '0' x 7;
2056                 }
2057                 if ($to->{'href'}) {
2058                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2059                                            substr($diffinfo->{'to_id'},0,7));
2060                 } else {
2061                         $to_link = '0' x 7;
2062                 }
2063                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2064                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2065         }
2066
2067         return $line . "<br/>\n";
2068 }
2069
2070 # format from-file/to-file diff header
2071 sub format_diff_from_to_header {
2072         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2073         my $line;
2074         my $result = '';
2075
2076         $line = $from_line;
2077         #assert($line =~ m/^---/) if DEBUG;
2078         # no extra formatting for "^--- /dev/null"
2079         if (! $diffinfo->{'nparents'}) {
2080                 # ordinary (single parent) diff
2081                 if ($line =~ m!^--- "?a/!) {
2082                         if ($from->{'href'}) {
2083                                 $line = '--- a/' .
2084                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2085                                                 esc_path($from->{'file'}));
2086                         } else {
2087                                 $line = '--- a/' .
2088                                         esc_path($from->{'file'});
2089                         }
2090                 }
2091                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2092
2093         } else {
2094                 # combined diff (merge commit)
2095                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2096                         if ($from->{'href'}[$i]) {
2097                                 $line = '--- ' .
2098                                         $cgi->a({-href=>href(action=>"blobdiff",
2099                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2100                                                              hash_parent_base=>$parents[$i],
2101                                                              file_parent=>$from->{'file'}[$i],
2102                                                              hash=>$diffinfo->{'to_id'},
2103                                                              hash_base=>$hash,
2104                                                              file_name=>$to->{'file'}),
2105                                                  -class=>"path",
2106                                                  -title=>"diff" . ($i+1)},
2107                                                 $i+1) .
2108                                         '/' .
2109                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2110                                                 esc_path($from->{'file'}[$i]));
2111                         } else {
2112                                 $line = '--- /dev/null';
2113                         }
2114                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2115                 }
2116         }
2117
2118         $line = $to_line;
2119         #assert($line =~ m/^\+\+\+/) if DEBUG;
2120         # no extra formatting for "^+++ /dev/null"
2121         if ($line =~ m!^\+\+\+ "?b/!) {
2122                 if ($to->{'href'}) {
2123                         $line = '+++ b/' .
2124                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2125                                         esc_path($to->{'file'}));
2126                 } else {
2127                         $line = '+++ b/' .
2128                                 esc_path($to->{'file'});
2129                 }
2130         }
2131         $result .= qq!<div class="diff to_file">$line</div>\n!;
2132
2133         return $result;
2134 }
2135
2136 # create note for patch simplified by combined diff
2137 sub format_diff_cc_simplified {
2138         my ($diffinfo, @parents) = @_;
2139         my $result = '';
2140
2141         $result .= "<div class=\"diff header\">" .
2142                    "diff --cc ";
2143         if (!is_deleted($diffinfo)) {
2144                 $result .= $cgi->a({-href => href(action=>"blob",
2145                                                   hash_base=>$hash,
2146                                                   hash=>$diffinfo->{'to_id'},
2147                                                   file_name=>$diffinfo->{'to_file'}),
2148                                     -class => "path"},
2149                                    esc_path($diffinfo->{'to_file'}));
2150         } else {
2151                 $result .= esc_path($diffinfo->{'to_file'});
2152         }
2153         $result .= "</div>\n" . # class="diff header"
2154                    "<div class=\"diff nodifferences\">" .
2155                    "Simple merge" .
2156                    "</div>\n"; # class="diff nodifferences"
2157
2158         return $result;
2159 }
2160
2161 # format patch (diff) line (not to be used for diff headers)
2162 sub format_diff_line {
2163         my $line = shift;
2164         my ($from, $to) = @_;
2165         my $diff_class = "";
2166
2167         chomp $line;
2168
2169         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2170                 # combined diff
2171                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2172                 if ($line =~ m/^\@{3}/) {
2173                         $diff_class = " chunk_header";
2174                 } elsif ($line =~ m/^\\/) {
2175                         $diff_class = " incomplete";
2176                 } elsif ($prefix =~ tr/+/+/) {
2177                         $diff_class = " add";
2178                 } elsif ($prefix =~ tr/-/-/) {
2179                         $diff_class = " rem";
2180                 }
2181         } else {
2182                 # assume ordinary diff
2183                 my $char = substr($line, 0, 1);
2184                 if ($char eq '+') {
2185                         $diff_class = " add";
2186                 } elsif ($char eq '-') {
2187                         $diff_class = " rem";
2188                 } elsif ($char eq '@') {
2189                         $diff_class = " chunk_header";
2190                 } elsif ($char eq "\\") {
2191                         $diff_class = " incomplete";
2192                 }
2193         }
2194         $line = untabify($line);
2195         if ($from && $to && $line =~ m/^\@{2} /) {
2196                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2197                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2198
2199                 $from_lines = 0 unless defined $from_lines;
2200                 $to_lines   = 0 unless defined $to_lines;
2201
2202                 if ($from->{'href'}) {
2203                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2204                                              -class=>"list"}, $from_text);
2205                 }
2206                 if ($to->{'href'}) {
2207                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2208                                              -class=>"list"}, $to_text);
2209                 }
2210                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2211                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2212                 return "<div class=\"diff$diff_class\">$line</div>\n";
2213         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2214                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2215                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2216
2217                 @from_text = split(' ', $ranges);
2218                 for (my $i = 0; $i < @from_text; ++$i) {
2219                         ($from_start[$i], $from_nlines[$i]) =
2220                                 (split(',', substr($from_text[$i], 1)), 0);
2221                 }
2222
2223                 $to_text   = pop @from_text;
2224                 $to_start  = pop @from_start;
2225                 $to_nlines = pop @from_nlines;
2226
2227                 $line = "<span class=\"chunk_info\">$prefix ";
2228                 for (my $i = 0; $i < @from_text; ++$i) {
2229                         if ($from->{'href'}[$i]) {
2230                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2231                                                   -class=>"list"}, $from_text[$i]);
2232                         } else {
2233                                 $line .= $from_text[$i];
2234                         }
2235                         $line .= " ";
2236                 }
2237                 if ($to->{'href'}) {
2238                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2239                                           -class=>"list"}, $to_text);
2240                 } else {
2241                         $line .= $to_text;
2242                 }
2243                 $line .= " $prefix</span>" .
2244                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2245                 return "<div class=\"diff$diff_class\">$line</div>\n";
2246         }
2247         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2248 }
2249
2250 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2251 # linked.  Pass the hash of the tree/commit to snapshot.
2252 sub format_snapshot_links {
2253         my ($hash) = @_;
2254         my $num_fmts = @snapshot_fmts;
2255         if ($num_fmts > 1) {
2256                 # A parenthesized list of links bearing format names.
2257                 # e.g. "snapshot (_tar.gz_ _zip_)"
2258                 return "snapshot (" . join(' ', map
2259                         $cgi->a({
2260                                 -href => href(
2261                                         action=>"snapshot",
2262                                         hash=>$hash,
2263                                         snapshot_format=>$_
2264                                 )
2265                         }, $known_snapshot_formats{$_}{'display'})
2266                 , @snapshot_fmts) . ")";
2267         } elsif ($num_fmts == 1) {
2268                 # A single "snapshot" link whose tooltip bears the format name.
2269                 # i.e. "_snapshot_"
2270                 my ($fmt) = @snapshot_fmts;
2271                 return
2272                         $cgi->a({
2273                                 -href => href(
2274                                         action=>"snapshot",
2275                                         hash=>$hash,
2276                                         snapshot_format=>$fmt
2277                                 ),
2278                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2279                         }, "snapshot");
2280         } else { # $num_fmts == 0
2281                 return undef;
2282         }
2283 }
2284
2285 ## ......................................................................
2286 ## functions returning values to be passed, perhaps after some
2287 ## transformation, to other functions; e.g. returning arguments to href()
2288
2289 # returns hash to be passed to href to generate gitweb URL
2290 # in -title key it returns description of link
2291 sub get_feed_info {
2292         my $format = shift || 'Atom';
2293         my %res = (action => lc($format));
2294
2295         # feed links are possible only for project views
2296         return unless (defined $project);
2297         # some views should link to OPML, or to generic project feed,
2298         # or don't have specific feed yet (so they should use generic)
2299         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2300
2301         my $branch;
2302         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2303         # from tag links; this also makes possible to detect branch links
2304         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2305             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2306                 $branch = $1;
2307         }
2308         # find log type for feed description (title)
2309         my $type = 'log';
2310         if (defined $file_name) {
2311                 $type  = "history of $file_name";
2312                 $type .= "/" if ($action eq 'tree');
2313                 $type .= " on '$branch'" if (defined $branch);
2314         } else {
2315                 $type = "log of $branch" if (defined $branch);
2316         }
2317
2318         $res{-title} = $type;
2319         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2320         $res{'file_name'} = $file_name;
2321
2322         return %res;
2323 }
2324
2325 ## ----------------------------------------------------------------------
2326 ## git utility subroutines, invoking git commands
2327
2328 # returns path to the core git executable and the --git-dir parameter as list
2329 sub git_cmd {
2330         $number_of_git_cmds++;
2331         return $GIT, '--git-dir='.$git_dir;
2332 }
2333
2334 # quote the given arguments for passing them to the shell
2335 # quote_command("command", "arg 1", "arg with ' and ! characters")
2336 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2337 # Try to avoid using this function wherever possible.
2338 sub quote_command {
2339         return join(' ',
2340                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2341 }
2342
2343 # get HEAD ref of given project as hash
2344 sub git_get_head_hash {
2345         return git_get_full_hash(shift, 'HEAD');
2346 }
2347
2348 sub git_get_full_hash {
2349         return git_get_hash(@_);
2350 }
2351
2352 sub git_get_short_hash {
2353         return git_get_hash(@_, '--short=7');
2354 }
2355
2356 sub git_get_hash {
2357         my ($project, $hash, @options) = @_;
2358         my $o_git_dir = $git_dir;
2359         my $retval = undef;
2360         $git_dir = "$projectroot/$project";
2361         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2362             '--verify', '-q', @options, $hash) {
2363                 $retval = <$fd>;
2364                 chomp $retval if defined $retval;
2365                 close $fd;
2366         }
2367         if (defined $o_git_dir) {
2368                 $git_dir = $o_git_dir;
2369         }
2370         return $retval;
2371 }
2372
2373 # get type of given object
2374 sub git_get_type {
2375         my $hash = shift;
2376
2377         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2378         my $type = <$fd>;
2379         close $fd or return;
2380         chomp $type;
2381         return $type;
2382 }
2383
2384 # repository configuration
2385 our $config_file = '';
2386 our %config;
2387
2388 # store multiple values for single key as anonymous array reference
2389 # single values stored directly in the hash, not as [ <value> ]
2390 sub hash_set_multi {
2391         my ($hash, $key, $value) = @_;
2392
2393         if (!exists $hash->{$key}) {
2394                 $hash->{$key} = $value;
2395         } elsif (!ref $hash->{$key}) {
2396                 $hash->{$key} = [ $hash->{$key}, $value ];
2397         } else {
2398                 push @{$hash->{$key}}, $value;
2399         }
2400 }
2401
2402 # return hash of git project configuration
2403 # optionally limited to some section, e.g. 'gitweb'
2404 sub git_parse_project_config {
2405         my $section_regexp = shift;
2406         my %config;
2407
2408         local $/ = "\0";
2409
2410         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2411                 or return;
2412
2413         while (my $keyval = <$fh>) {
2414                 chomp $keyval;
2415                 my ($key, $value) = split(/\n/, $keyval, 2);
2416
2417                 hash_set_multi(\%config, $key, $value)
2418                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2419         }
2420         close $fh;
2421
2422         return %config;
2423 }
2424
2425 # convert config value to boolean: 'true' or 'false'
2426 # no value, number > 0, 'true' and 'yes' values are true
2427 # rest of values are treated as false (never as error)
2428 sub config_to_bool {
2429         my $val = shift;
2430
2431         return 1 if !defined $val;             # section.key
2432
2433         # strip leading and trailing whitespace
2434         $val =~ s/^\s+//;
2435         $val =~ s/\s+$//;
2436
2437         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2438                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2439 }
2440
2441 # convert config value to simple decimal number
2442 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2443 # to be multiplied by 1024, 1048576, or 1073741824
2444 sub config_to_int {
2445         my $val = shift;
2446
2447         # strip leading and trailing whitespace
2448         $val =~ s/^\s+//;
2449         $val =~ s/\s+$//;
2450
2451         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2452                 $unit = lc($unit);
2453                 # unknown unit is treated as 1
2454                 return $num * ($unit eq 'g' ? 1073741824 :
2455                                $unit eq 'm' ?    1048576 :
2456                                $unit eq 'k' ?       1024 : 1);
2457         }
2458         return $val;
2459 }
2460
2461 # convert config value to array reference, if needed
2462 sub config_to_multi {
2463         my $val = shift;
2464
2465         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2466 }
2467
2468 sub git_get_project_config {
2469         my ($key, $type) = @_;
2470
2471         return unless defined $git_dir;
2472
2473         # key sanity check
2474         return unless ($key);
2475         $key =~ s/^gitweb\.//;
2476         return if ($key =~ m/\W/);
2477
2478         # type sanity check
2479         if (defined $type) {
2480                 $type =~ s/^--//;
2481                 $type = undef
2482                         unless ($type eq 'bool' || $type eq 'int');
2483         }
2484
2485         # get config
2486         if (!defined $config_file ||
2487             $config_file ne "$git_dir/config") {
2488                 %config = git_parse_project_config('gitweb');
2489                 $config_file = "$git_dir/config";
2490         }
2491
2492         # check if config variable (key) exists
2493         return unless exists $config{"gitweb.$key"};
2494
2495         # ensure given type
2496         if (!defined $type) {
2497                 return $config{"gitweb.$key"};
2498         } elsif ($type eq 'bool') {
2499                 # backward compatibility: 'git config --bool' returns true/false
2500                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2501         } elsif ($type eq 'int') {
2502                 return config_to_int($config{"gitweb.$key"});
2503         }
2504         return $config{"gitweb.$key"};
2505 }
2506
2507 # get hash of given path at given ref
2508 sub git_get_hash_by_path {
2509         my $base = shift;
2510         my $path = shift || return undef;
2511         my $type = shift;
2512
2513         $path =~ s,/+$,,;
2514
2515         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2516                 or die_error(500, "Open git-ls-tree failed");
2517         my $line = <$fd>;
2518         close $fd or return undef;
2519
2520         if (!defined $line) {
2521                 # there is no tree or hash given by $path at $base
2522                 return undef;
2523         }
2524
2525         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2526         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2527         if (defined $type && $type ne $2) {
2528                 # type doesn't match
2529                 return undef;
2530         }
2531         return $3;
2532 }
2533
2534 # get path of entry with given hash at given tree-ish (ref)
2535 # used to get 'from' filename for combined diff (merge commit) for renames
2536 sub git_get_path_by_hash {
2537         my $base = shift || return;
2538         my $hash = shift || return;
2539
2540         local $/ = "\0";
2541
2542         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2543                 or return undef;
2544         while (my $line = <$fd>) {
2545                 chomp $line;
2546
2547                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2548                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2549                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2550                         close $fd;
2551                         return $1;
2552                 }
2553         }
2554         close $fd;
2555         return undef;
2556 }
2557
2558 ## ......................................................................
2559 ## git utility functions, directly accessing git repository
2560
2561 sub git_get_project_description {
2562         my $path = shift;
2563
2564         $git_dir = "$projectroot/$path";
2565         open my $fd, '<', "$git_dir/description"
2566                 or return git_get_project_config('description');
2567         my $descr = <$fd>;
2568         close $fd;
2569         if (defined $descr) {
2570                 chomp $descr;
2571         }
2572         return $descr;
2573 }
2574
2575 sub git_get_project_ctags {
2576         my $path = shift;
2577         my $ctags = {};
2578
2579         $git_dir = "$projectroot/$path";
2580         opendir my $dh, "$git_dir/ctags"
2581                 or return $ctags;
2582         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2583                 open my $ct, '<', $_ or next;
2584                 my $val = <$ct>;
2585                 chomp $val;
2586                 close $ct;
2587                 my $ctag = $_; $ctag =~ s#.*/##;
2588                 $ctags->{$ctag} = $val;
2589         }
2590         closedir $dh;
2591         $ctags;
2592 }
2593
2594 sub git_populate_project_tagcloud {
2595         my $ctags = shift;
2596
2597         # First, merge different-cased tags; tags vote on casing
2598         my %ctags_lc;
2599         foreach (keys %$ctags) {
2600                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2601                 if (not $ctags_lc{lc $_}->{topcount}
2602                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2603                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2604                         $ctags_lc{lc $_}->{topname} = $_;
2605                 }
2606         }
2607
2608         my $cloud;
2609         if (eval { require HTML::TagCloud; 1; }) {
2610                 $cloud = HTML::TagCloud->new;
2611                 foreach (sort keys %ctags_lc) {
2612                         # Pad the title with spaces so that the cloud looks
2613                         # less crammed.
2614                         my $title = $ctags_lc{$_}->{topname};
2615                         $title =~ s/ /&nbsp;/g;
2616                         $title =~ s/^/&nbsp;/g;
2617                         $title =~ s/$/&nbsp;/g;
2618                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2619                 }
2620         } else {
2621                 $cloud = \%ctags_lc;
2622         }
2623         $cloud;
2624 }
2625
2626 sub git_show_project_tagcloud {
2627         my ($cloud, $count) = @_;
2628         print STDERR ref($cloud)."..\n";
2629         if (ref $cloud eq 'HTML::TagCloud') {
2630                 return $cloud->html_and_css($count);
2631         } else {
2632                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2633                 return '<p align="center">' . join (', ', map {
2634                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2635                 } splice(@tags, 0, $count)) . '</p>';
2636         }
2637 }
2638
2639 sub git_get_project_url_list {
2640         my $path = shift;
2641
2642         $git_dir = "$projectroot/$path";
2643         open my $fd, '<', "$git_dir/cloneurl"
2644                 or return wantarray ?
2645                 @{ config_to_multi(git_get_project_config('url')) } :
2646                    config_to_multi(git_get_project_config('url'));
2647         my @git_project_url_list = map { chomp; $_ } <$fd>;
2648         close $fd;
2649
2650         return wantarray ? @git_project_url_list : \@git_project_url_list;
2651 }
2652
2653 sub git_get_projects_list {
2654         my ($filter) = @_;
2655         my @list;
2656
2657         $filter ||= '';
2658         $filter =~ s/\.git$//;
2659
2660         my $check_forks = gitweb_check_feature('forks');
2661
2662         if (-d $projects_list) {
2663                 # search in directory
2664                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2665                 # remove the trailing "/"
2666                 $dir =~ s!/+$!!;
2667                 my $pfxlen = length("$dir");
2668                 my $pfxdepth = ($dir =~ tr!/!!);
2669
2670                 File::Find::find({
2671                         follow_fast => 1, # follow symbolic links
2672                         follow_skip => 2, # ignore duplicates
2673                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2674                         wanted => sub {
2675                                 # global variables
2676                                 our $project_maxdepth;
2677                                 our $projectroot;
2678                                 # skip project-list toplevel, if we get it.
2679                                 return if (m!^[/.]$!);
2680                                 # only directories can be git repositories
2681                                 return unless (-d $_);
2682                                 # don't traverse too deep (Find is super slow on os x)
2683                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2684                                         $File::Find::prune = 1;
2685                                         return;
2686                                 }
2687
2688                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2689                                 # we check related file in $projectroot
2690                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2691                                 if (check_export_ok("$projectroot/$path")) {
2692                                         push @list, { path => $path };
2693                                         $File::Find::prune = 1;
2694                                 }
2695                         },
2696                 }, "$dir");
2697
2698         } elsif (-f $projects_list) {
2699                 # read from file(url-encoded):
2700                 # 'git%2Fgit.git Linus+Torvalds'
2701                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2702                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2703                 my %paths;
2704                 open my $fd, '<', $projects_list or return;
2705         PROJECT:
2706                 while (my $line = <$fd>) {
2707                         chomp $line;
2708                         my ($path, $owner) = split ' ', $line;
2709                         $path = unescape($path);
2710                         $owner = unescape($owner);
2711                         if (!defined $path) {
2712                                 next;
2713                         }
2714                         if ($filter ne '') {
2715                                 # looking for forks;
2716                                 my $pfx = substr($path, 0, length($filter));
2717                                 if ($pfx ne $filter) {
2718                                         next PROJECT;
2719                                 }
2720                                 my $sfx = substr($path, length($filter));
2721                                 if ($sfx !~ /^\/.*\.git$/) {
2722                                         next PROJECT;
2723                                 }
2724                         } elsif ($check_forks) {
2725                         PATH:
2726                                 foreach my $filter (keys %paths) {
2727                                         # looking for forks;
2728                                         my $pfx = substr($path, 0, length($filter));
2729                                         if ($pfx ne $filter) {
2730                                                 next PATH;
2731                                         }
2732                                         my $sfx = substr($path, length($filter));
2733                                         if ($sfx !~ /^\/.*\.git$/) {
2734                                                 next PATH;
2735                                         }
2736                                         # is a fork, don't include it in
2737                                         # the list
2738                                         next PROJECT;
2739                                 }
2740                         }
2741                         if (check_export_ok("$projectroot/$path")) {
2742                                 my $pr = {
2743                                         path => $path,
2744                                         owner => to_utf8($owner),
2745                                 };
2746                                 push @list, $pr;
2747                                 (my $forks_path = $path) =~ s/\.git$//;
2748                                 $paths{$forks_path}++;
2749                         }
2750                 }
2751                 close $fd;
2752         }
2753         return @list;
2754 }
2755
2756 our $gitweb_project_owner = undef;
2757 sub git_get_project_list_from_file {
2758
2759         return if (defined $gitweb_project_owner);
2760
2761         $gitweb_project_owner = {};
2762         # read from file (url-encoded):
2763         # 'git%2Fgit.git Linus+Torvalds'
2764         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2765         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2766         if (-f $projects_list) {
2767                 open(my $fd, '<', $projects_list);
2768                 while (my $line = <$fd>) {
2769                         chomp $line;
2770                         my ($pr, $ow) = split ' ', $line;
2771                         $pr = unescape($pr);
2772                         $ow = unescape($ow);
2773                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2774                 }
2775                 close $fd;
2776         }
2777 }
2778
2779 sub git_get_project_owner {
2780         my $project = shift;
2781         my $owner;
2782
2783         return undef unless $project;
2784         $git_dir = "$projectroot/$project";
2785
2786         if (!defined $gitweb_project_owner) {
2787                 git_get_project_list_from_file();
2788         }
2789
2790         if (exists $gitweb_project_owner->{$project}) {
2791                 $owner = $gitweb_project_owner->{$project};
2792         }
2793         if (!defined $owner){
2794                 $owner = git_get_project_config('owner');
2795         }
2796         if (!defined $owner) {
2797                 $owner = get_file_owner("$git_dir");
2798         }
2799
2800         return $owner;
2801 }
2802
2803 sub git_get_last_activity {
2804         my ($path) = @_;
2805         my $fd;
2806
2807         $git_dir = "$projectroot/$path";
2808         open($fd, "-|", git_cmd(), 'for-each-ref',
2809              '--format=%(committer)',
2810              '--sort=-committerdate',
2811              '--count=1',
2812              'refs/heads') or return;
2813         my $most_recent = <$fd>;
2814         close $fd or return;
2815         if (defined $most_recent &&
2816             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2817                 my $timestamp = $1;
2818                 my $age = time - $timestamp;
2819                 return ($age, age_string($age));
2820         }
2821         return (undef, undef);
2822 }
2823
2824 # Implementation note: when a single remote is wanted, we cannot use 'git
2825 # remote show -n' because that command always work (assuming it's a remote URL
2826 # if it's not defined), and we cannot use 'git remote show' because that would
2827 # try to make a network roundtrip. So the only way to find if that particular
2828 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2829 # and when we find what we want.
2830 sub git_get_remotes_list {
2831         my $wanted = shift;
2832         my %remotes = ();
2833
2834         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2835         return unless $fd;
2836         while (my $remote = <$fd>) {
2837                 chomp $remote;
2838                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2839                 next if $wanted and not $remote eq $wanted;
2840                 my ($url, $key) = ($1, $2);
2841
2842                 $remotes{$remote} ||= { 'heads' => () };
2843                 $remotes{$remote}{$key} = $url;
2844         }
2845         close $fd or return;
2846         return wantarray ? %remotes : \%remotes;
2847 }
2848
2849 # Takes a hash of remotes as first parameter and fills it by adding the
2850 # available remote heads for each of the indicated remotes.
2851 sub fill_remote_heads {
2852         my $remotes = shift;
2853         my @heads = map { "remotes/$_" } keys %$remotes;
2854         my @remoteheads = git_get_heads_list(undef, @heads);
2855         foreach my $remote (keys %$remotes) {
2856                 $remotes->{$remote}{'heads'} = [ grep {
2857                         $_->{'name'} =~ s!^$remote/!!
2858                         } @remoteheads ];
2859         }
2860 }
2861
2862 sub git_get_references {
2863         my $type = shift || "";
2864         my %refs;
2865         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2866         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2867         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2868                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2869                 or return;
2870
2871         while (my $line = <$fd>) {
2872                 chomp $line;
2873                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2874                         if (defined $refs{$1}) {
2875                                 push @{$refs{$1}}, $2;
2876                         } else {
2877                                 $refs{$1} = [ $2 ];
2878                         }
2879                 }
2880         }
2881         close $fd or return;
2882         return \%refs;
2883 }
2884
2885 sub git_get_rev_name_tags {
2886         my $hash = shift || return undef;
2887
2888         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2889                 or return;
2890         my $name_rev = <$fd>;
2891         close $fd;
2892
2893         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2894                 return $1;
2895         } else {
2896                 # catches also '$hash undefined' output
2897                 return undef;
2898         }
2899 }
2900
2901 ## ----------------------------------------------------------------------
2902 ## parse to hash functions
2903
2904 sub parse_date {
2905         my $epoch = shift;
2906         my $tz = shift || "-0000";
2907
2908         my %date;
2909         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2910         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2911         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2912         $date{'hour'} = $hour;
2913         $date{'minute'} = $min;
2914         $date{'mday'} = $mday;
2915         $date{'day'} = $days[$wday];
2916         $date{'month'} = $months[$mon];
2917         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2918                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2919         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2920                              $mday, $months[$mon], $hour ,$min;
2921         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2922                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2923
2924         my ($tz_sign, $tz_hour, $tz_min) =
2925                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
2926         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
2927         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
2928         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2929         $date{'hour_local'} = $hour;
2930         $date{'minute_local'} = $min;
2931         $date{'tz_local'} = $tz;
2932         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2933                                   1900+$year, $mon+1, $mday,
2934                                   $hour, $min, $sec, $tz);
2935         return %date;
2936 }
2937
2938 sub parse_tag {
2939         my $tag_id = shift;
2940         my %tag;
2941         my @comment;
2942
2943         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2944         $tag{'id'} = $tag_id;
2945         while (my $line = <$fd>) {
2946                 chomp $line;
2947                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2948                         $tag{'object'} = $1;
2949                 } elsif ($line =~ m/^type (.+)$/) {
2950                         $tag{'type'} = $1;
2951                 } elsif ($line =~ m/^tag (.+)$/) {
2952                         $tag{'name'} = $1;
2953                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2954                         $tag{'author'} = $1;
2955                         $tag{'author_epoch'} = $2;
2956                         $tag{'author_tz'} = $3;
2957                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2958                                 $tag{'author_name'}  = $1;
2959                                 $tag{'author_email'} = $2;
2960                         } else {
2961                                 $tag{'author_name'} = $tag{'author'};
2962                         }
2963                 } elsif ($line =~ m/--BEGIN/) {
2964                         push @comment, $line;
2965                         last;
2966                 } elsif ($line eq "") {
2967                         last;
2968                 }
2969         }
2970         push @comment, <$fd>;
2971         $tag{'comment'} = \@comment;
2972         close $fd or return;
2973         if (!defined $tag{'name'}) {
2974                 return
2975         };
2976         return %tag
2977 }
2978
2979 sub parse_commit_text {
2980         my ($commit_text, $withparents) = @_;
2981         my @commit_lines = split '\n', $commit_text;
2982         my %co;
2983
2984         pop @commit_lines; # Remove '\0'
2985
2986         if (! @commit_lines) {
2987                 return;
2988         }
2989
2990         my $header = shift @commit_lines;
2991         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2992                 return;
2993         }
2994         ($co{'id'}, my @parents) = split ' ', $header;
2995         while (my $line = shift @commit_lines) {
2996                 last if $line eq "\n";
2997                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2998                         $co{'tree'} = $1;
2999                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3000                         push @parents, $1;
3001                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3002                         $co{'author'} = to_utf8($1);
3003                         $co{'author_epoch'} = $2;
3004                         $co{'author_tz'} = $3;
3005                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3006                                 $co{'author_name'}  = $1;
3007                                 $co{'author_email'} = $2;
3008                         } else {
3009                                 $co{'author_name'} = $co{'author'};
3010                         }
3011                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3012                         $co{'committer'} = to_utf8($1);
3013                         $co{'committer_epoch'} = $2;
3014                         $co{'committer_tz'} = $3;
3015                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3016                                 $co{'committer_name'}  = $1;
3017                                 $co{'committer_email'} = $2;
3018                         } else {
3019                                 $co{'committer_name'} = $co{'committer'};
3020                         }
3021                 }
3022         }
3023         if (!defined $co{'tree'}) {
3024                 return;
3025         };
3026         $co{'parents'} = \@parents;
3027         $co{'parent'} = $parents[0];
3028
3029         foreach my $title (@commit_lines) {
3030                 $title =~ s/^    //;
3031                 if ($title ne "") {
3032                         $co{'title'} = chop_str($title, 80, 5);
3033                         # remove leading stuff of merges to make the interesting part visible
3034                         if (length($title) > 50) {
3035                                 $title =~ s/^Automatic //;
3036                                 $title =~ s/^merge (of|with) /Merge ... /i;
3037                                 if (length($title) > 50) {
3038                                         $title =~ s/(http|rsync):\/\///;
3039                                 }
3040                                 if (length($title) > 50) {
3041                                         $title =~ s/(master|www|rsync)\.//;
3042                                 }
3043                                 if (length($title) > 50) {
3044                                         $title =~ s/kernel.org:?//;
3045                                 }
3046                                 if (length($title) > 50) {
3047                                         $title =~ s/\/pub\/scm//;
3048                                 }
3049                         }
3050                         $co{'title_short'} = chop_str($title, 50, 5);
3051                         last;
3052                 }
3053         }
3054         if (! defined $co{'title'} || $co{'title'} eq "") {
3055                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3056         }
3057         # remove added spaces
3058         foreach my $line (@commit_lines) {
3059                 $line =~ s/^    //;
3060         }
3061         $co{'comment'} = \@commit_lines;
3062
3063         my $age = time - $co{'committer_epoch'};
3064         $co{'age'} = $age;
3065         $co{'age_string'} = age_string($age);
3066         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3067         if ($age > 60*60*24*7*2) {
3068                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3069                 $co{'age_string_age'} = $co{'age_string'};
3070         } else {
3071                 $co{'age_string_date'} = $co{'age_string'};
3072                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3073         }
3074         return %co;
3075 }
3076
3077 sub parse_commit {
3078         my ($commit_id) = @_;
3079         my %co;
3080
3081         local $/ = "\0";
3082
3083         open my $fd, "-|", git_cmd(), "rev-list",
3084                 "--parents",
3085                 "--header",
3086                 "--max-count=1",
3087                 $commit_id,
3088                 "--",
3089                 or die_error(500, "Open git-rev-list failed");
3090         %co = parse_commit_text(<$fd>, 1);
3091         close $fd;
3092
3093         return %co;
3094 }
3095
3096 sub parse_commits {
3097         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3098         my @cos;
3099
3100         $maxcount ||= 1;
3101         $skip ||= 0;
3102
3103         local $/ = "\0";
3104
3105         open my $fd, "-|", git_cmd(), "rev-list",
3106                 "--header",
3107                 @args,
3108                 ("--max-count=" . $maxcount),
3109                 ("--skip=" . $skip),
3110                 @extra_options,
3111                 $commit_id,
3112                 "--",
3113                 ($filename ? ($filename) : ())
3114                 or die_error(500, "Open git-rev-list failed");
3115         while (my $line = <$fd>) {
3116                 my %co = parse_commit_text($line);
3117                 push @cos, \%co;
3118         }
3119         close $fd;
3120
3121         return wantarray ? @cos : \@cos;
3122 }
3123
3124 # parse line of git-diff-tree "raw" output
3125 sub parse_difftree_raw_line {
3126         my $line = shift;
3127         my %res;
3128
3129         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3130         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3131         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3132                 $res{'from_mode'} = $1;
3133                 $res{'to_mode'} = $2;
3134                 $res{'from_id'} = $3;
3135                 $res{'to_id'} = $4;
3136                 $res{'status'} = $5;
3137                 $res{'similarity'} = $6;
3138                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3139                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3140                 } else {
3141                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3142                 }
3143         }
3144         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3145         # combined diff (for merge commit)
3146         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3147                 $res{'nparents'}  = length($1);
3148                 $res{'from_mode'} = [ split(' ', $2) ];
3149                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3150                 $res{'from_id'} = [ split(' ', $3) ];
3151                 $res{'to_id'} = pop @{$res{'from_id'}};
3152                 $res{'status'} = [ split('', $4) ];
3153                 $res{'to_file'} = unquote($5);
3154         }
3155         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3156         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3157                 $res{'commit'} = $1;
3158         }
3159
3160         return wantarray ? %res : \%res;
3161 }
3162
3163 # wrapper: return parsed line of git-diff-tree "raw" output
3164 # (the argument might be raw line, or parsed info)
3165 sub parsed_difftree_line {
3166         my $line_or_ref = shift;
3167
3168         if (ref($line_or_ref) eq "HASH") {
3169                 # pre-parsed (or generated by hand)
3170                 return $line_or_ref;
3171         } else {
3172                 return parse_difftree_raw_line($line_or_ref);
3173         }
3174 }
3175
3176 # parse line of git-ls-tree output
3177 sub parse_ls_tree_line {
3178         my $line = shift;
3179         my %opts = @_;
3180         my %res;
3181
3182         if ($opts{'-l'}) {
3183                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3184                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3185
3186                 $res{'mode'} = $1;
3187                 $res{'type'} = $2;
3188                 $res{'hash'} = $3;
3189                 $res{'size'} = $4;
3190                 if ($opts{'-z'}) {
3191                         $res{'name'} = $5;
3192                 } else {
3193                         $res{'name'} = unquote($5);
3194                 }
3195         } else {
3196                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3197                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3198
3199                 $res{'mode'} = $1;
3200                 $res{'type'} = $2;
3201                 $res{'hash'} = $3;
3202                 if ($opts{'-z'}) {
3203                         $res{'name'} = $4;
3204                 } else {
3205                         $res{'name'} = unquote($4);
3206                 }
3207         }
3208
3209         return wantarray ? %res : \%res;
3210 }
3211
3212 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3213 sub parse_from_to_diffinfo {
3214         my ($diffinfo, $from, $to, @parents) = @_;
3215
3216         if ($diffinfo->{'nparents'}) {
3217                 # combined diff
3218                 $from->{'file'} = [];
3219                 $from->{'href'} = [];
3220                 fill_from_file_info($diffinfo, @parents)
3221                         unless exists $diffinfo->{'from_file'};
3222                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3223                         $from->{'file'}[$i] =
3224                                 defined $diffinfo->{'from_file'}[$i] ?
3225                                         $diffinfo->{'from_file'}[$i] :
3226                                         $diffinfo->{'to_file'};
3227                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3228                                 $from->{'href'}[$i] = href(action=>"blob",
3229                                                            hash_base=>$parents[$i],
3230                                                            hash=>$diffinfo->{'from_id'}[$i],
3231                                                            file_name=>$from->{'file'}[$i]);
3232                         } else {
3233                                 $from->{'href'}[$i] = undef;
3234                         }
3235                 }
3236         } else {
3237                 # ordinary (not combined) diff
3238                 $from->{'file'} = $diffinfo->{'from_file'};
3239                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3240                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3241                                                hash=>$diffinfo->{'from_id'},
3242                                                file_name=>$from->{'file'});
3243                 } else {
3244                         delete $from->{'href'};
3245                 }
3246         }
3247
3248         $to->{'file'} = $diffinfo->{'to_file'};
3249         if (!is_deleted($diffinfo)) { # file exists in result
3250                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3251                                      hash=>$diffinfo->{'to_id'},
3252                                      file_name=>$to->{'file'});
3253         } else {
3254                 delete $to->{'href'};
3255         }
3256 }
3257
3258 ## ......................................................................
3259 ## parse to array of hashes functions
3260
3261 sub git_get_heads_list {
3262         my ($limit, @classes) = @_;
3263         @classes = ('heads') unless @classes;
3264         my @patterns = map { "refs/$_" } @classes;
3265         my @headslist;
3266
3267         open my $fd, '-|', git_cmd(), 'for-each-ref',
3268                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3269                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3270                 @patterns
3271                 or return;
3272         while (my $line = <$fd>) {
3273                 my %ref_item;
3274
3275                 chomp $line;
3276                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3277                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3278                 my ($committer, $epoch, $tz) =
3279                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3280                 $ref_item{'fullname'}  = $name;
3281                 $name =~ s!^refs/(?:head|remote)s/!!;
3282
3283                 $ref_item{'name'}  = $name;
3284                 $ref_item{'id'}    = $hash;
3285                 $ref_item{'title'} = $title || '(no commit message)';
3286                 $ref_item{'epoch'} = $epoch;
3287                 if ($epoch) {
3288                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3289                 } else {
3290                         $ref_item{'age'} = "unknown";
3291                 }
3292
3293                 push @headslist, \%ref_item;
3294         }
3295         close $fd;
3296
3297         return wantarray ? @headslist : \@headslist;
3298 }
3299
3300 sub git_get_tags_list {
3301         my $limit = shift;
3302         my @tagslist;
3303
3304         open my $fd, '-|', git_cmd(), 'for-each-ref',
3305                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3306                 '--format=%(objectname) %(objecttype) %(refname) '.
3307                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3308                 'refs/tags'
3309                 or return;
3310         while (my $line = <$fd>) {
3311                 my %ref_item;
3312
3313                 chomp $line;
3314                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3315                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3316                 my ($creator, $epoch, $tz) =
3317                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3318                 $ref_item{'fullname'} = $name;
3319                 $name =~ s!^refs/tags/!!;
3320
3321                 $ref_item{'type'} = $type;
3322                 $ref_item{'id'} = $id;
3323                 $ref_item{'name'} = $name;
3324                 if ($type eq "tag") {
3325                         $ref_item{'subject'} = $title;
3326                         $ref_item{'reftype'} = $reftype;
3327                         $ref_item{'refid'}   = $refid;
3328                 } else {
3329                         $ref_item{'reftype'} = $type;
3330                         $ref_item{'refid'}   = $id;
3331                 }
3332
3333                 if ($type eq "tag" || $type eq "commit") {
3334                         $ref_item{'epoch'} = $epoch;
3335                         if ($epoch) {
3336                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3337                         } else {
3338                                 $ref_item{'age'} = "unknown";
3339                         }
3340                 }
3341
3342                 push @tagslist, \%ref_item;
3343         }
3344         close $fd;
3345
3346         return wantarray ? @tagslist : \@tagslist;
3347 }
3348
3349 ## ----------------------------------------------------------------------
3350 ## filesystem-related functions
3351
3352 sub get_file_owner {
3353         my $path = shift;
3354
3355         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3356         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3357         if (!defined $gcos) {
3358                 return undef;
3359         }
3360         my $owner = $gcos;
3361         $owner =~ s/[,;].*$//;
3362         return to_utf8($owner);
3363 }
3364
3365 # assume that file exists
3366 sub insert_file {
3367         my $filename = shift;
3368
3369         open my $fd, '<', $filename;
3370         print map { to_utf8($_) } <$fd>;
3371         close $fd;
3372 }
3373
3374 ## ......................................................................
3375 ## mimetype related functions
3376
3377 sub mimetype_guess_file {
3378         my $filename = shift;
3379         my $mimemap = shift;
3380         -r $mimemap or return undef;
3381
3382         my %mimemap;
3383         open(my $mh, '<', $mimemap) or return undef;
3384         while (<$mh>) {
3385                 next if m/^#/; # skip comments
3386                 my ($mimetype, $exts) = split(/\t+/);
3387                 if (defined $exts) {
3388                         my @exts = split(/\s+/, $exts);
3389                         foreach my $ext (@exts) {
3390                                 $mimemap{$ext} = $mimetype;
3391                         }
3392                 }
3393         }
3394         close($mh);
3395
3396         $filename =~ /\.([^.]*)$/;
3397         return $mimemap{$1};
3398 }
3399
3400 sub mimetype_guess {
3401         my $filename = shift;
3402         my $mime;
3403         $filename =~ /\./ or return undef;
3404
3405         if ($mimetypes_file) {
3406                 my $file = $mimetypes_file;
3407                 if ($file !~ m!^/!) { # if it is relative path
3408                         # it is relative to project
3409                         $file = "$projectroot/$project/$file";
3410                 }
3411                 $mime = mimetype_guess_file($filename, $file);
3412         }
3413         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3414         return $mime;
3415 }
3416
3417 sub blob_mimetype {
3418         my $fd = shift;
3419         my $filename = shift;
3420
3421         if ($filename) {
3422                 my $mime = mimetype_guess($filename);
3423                 $mime and return $mime;
3424         }
3425
3426         # just in case
3427         return $default_blob_plain_mimetype unless $fd;
3428
3429         if (-T $fd) {
3430                 return 'text/plain';
3431         } elsif (! $filename) {
3432                 return 'application/octet-stream';
3433         } elsif ($filename =~ m/\.png$/i) {
3434                 return 'image/png';
3435         } elsif ($filename =~ m/\.gif$/i) {
3436                 return 'image/gif';
3437         } elsif ($filename =~ m/\.jpe?g$/i) {
3438                 return 'image/jpeg';
3439         } else {
3440                 return 'application/octet-stream';
3441         }
3442 }
3443
3444 sub blob_contenttype {
3445         my ($fd, $file_name, $type) = @_;
3446
3447         $type ||= blob_mimetype($fd, $file_name);
3448         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3449                 $type .= "; charset=$default_text_plain_charset";
3450         }
3451
3452         return $type;
3453 }
3454
3455 # guess file syntax for syntax highlighting; return undef if no highlighting
3456 # the name of syntax can (in the future) depend on syntax highlighter used
3457 sub guess_file_syntax {
3458         my ($highlight, $mimetype, $file_name) = @_;
3459         return undef unless ($highlight && defined $file_name);
3460         my $basename = basename($file_name, '.in');
3461         return $highlight_basename{$basename}
3462                 if exists $highlight_basename{$basename};
3463
3464         $basename =~ /\.([^.]*)$/;
3465         my $ext = $1 or return undef;
3466         return $highlight_ext{$ext}
3467                 if exists $highlight_ext{$ext};
3468
3469         return undef;
3470 }
3471
3472 # run highlighter and return FD of its output,
3473 # or return original FD if no highlighting
3474 sub run_highlighter {
3475         my ($fd, $highlight, $syntax) = @_;
3476         return $fd unless ($highlight && defined $syntax);
3477
3478         close $fd;
3479         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3480                   quote_command($highlight_bin).
3481                   " --replace-tabs=8 --fragment --syntax $syntax |"
3482                 or die_error(500, "Couldn't open file or run syntax highlighter");
3483         return $fd;
3484 }
3485
3486 ## ======================================================================
3487 ## functions printing HTML: header, footer, error page
3488
3489 sub get_page_title {
3490         my $title = to_utf8($site_name);
3491
3492         return $title unless (defined $project);
3493         $title .= " - " . to_utf8($project);
3494
3495         return $title unless (defined $action);
3496         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3497
3498         return $title unless (defined $file_name);
3499         $title .= " - " . esc_path($file_name);
3500         if ($action eq "tree" && $file_name !~ m|/$|) {
3501                 $title .= "/";
3502         }
3503
3504         return $title;
3505 }
3506
3507 sub print_feed_meta {
3508         if (defined $project) {
3509                 my %href_params = get_feed_info();
3510                 if (!exists $href_params{'-title'}) {
3511                         $href_params{'-title'} = 'log';
3512                 }
3513
3514                 foreach my $format (qw(RSS Atom)) {
3515                         my $type = lc($format);
3516                         my %link_attr = (
3517                                 '-rel' => 'alternate',
3518                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3519                                 '-type' => "application/$type+xml"
3520                         );
3521
3522                         $href_params{'action'} = $type;
3523                         $link_attr{'-href'} = href(%href_params);
3524                         print "<link ".
3525                               "rel=\"$link_attr{'-rel'}\" ".
3526                               "title=\"$link_attr{'-title'}\" ".
3527                               "href=\"$link_attr{'-href'}\" ".
3528                               "type=\"$link_attr{'-type'}\" ".
3529                               "/>\n";
3530
3531                         $href_params{'extra_options'} = '--no-merges';
3532                         $link_attr{'-href'} = href(%href_params);
3533                         $link_attr{'-title'} .= ' (no merges)';
3534                         print "<link ".
3535                               "rel=\"$link_attr{'-rel'}\" ".
3536                               "title=\"$link_attr{'-title'}\" ".
3537                               "href=\"$link_attr{'-href'}\" ".
3538                               "type=\"$link_attr{'-type'}\" ".
3539                               "/>\n";
3540                 }
3541
3542         } else {
3543                 printf('<link rel="alternate" title="%s projects list" '.
3544                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3545                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3546                 printf('<link rel="alternate" title="%s projects feeds" '.
3547                        'href="%s" type="text/x-opml" />'."\n",
3548                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3549         }
3550 }
3551
3552 sub git_header_html {
3553         my $status = shift || "200 OK";
3554         my $expires = shift;
3555         my %opts = @_;
3556
3557         my $title = get_page_title();
3558         my $content_type;
3559         # require explicit support from the UA if we are to send the page as
3560         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3561         # we have to do this because MSIE sometimes globs '*/*', pretending to
3562         # support xhtml+xml but choking when it gets what it asked for.
3563         if (defined $cgi->http('HTTP_ACCEPT') &&
3564             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3565             $cgi->Accept('application/xhtml+xml') != 0) {
3566                 $content_type = 'application/xhtml+xml';
3567         } else {
3568                 $content_type = 'text/html';
3569         }
3570         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3571                            -status=> $status, -expires => $expires)
3572                 unless ($opts{'-no_http_header'});
3573         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3574         print <<EOF;
3575 <?xml version="1.0" encoding="utf-8"?>
3576 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3577 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3578 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3579 <!-- git core binaries version $git_version -->
3580 <head>
3581 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3582 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3583 <meta name="robots" content="index, nofollow"/>
3584 <title>$title</title>
3585 EOF
3586         # the stylesheet, favicon etc urls won't work correctly with path_info
3587         # unless we set the appropriate base URL
3588         if ($ENV{'PATH_INFO'}) {
3589                 print "<base href=\"".esc_url($base_url)."\" />\n";
3590         }
3591         # print out each stylesheet that exist, providing backwards capability
3592         # for those people who defined $stylesheet in a config file
3593         if (defined $stylesheet) {
3594                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3595         } else {
3596                 foreach my $stylesheet (@stylesheets) {
3597                         next unless $stylesheet;
3598                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3599                 }
3600         }
3601         print_feed_meta()
3602                 if ($status eq '200 OK');
3603         if (defined $favicon) {
3604                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3605         }
3606
3607         print "</head>\n" .
3608               "<body>\n";
3609
3610         if (defined $site_header && -f $site_header) {
3611                 insert_file($site_header);
3612         }
3613
3614         print "<div class=\"page_header\">\n";
3615         if (defined $logo) {
3616                 print $cgi->a({-href => esc_url($logo_url),
3617                                -title => $logo_label},
3618                               $cgi->img({-src => esc_url($logo),
3619                                          -width => 72, -height => 27,
3620                                          -alt => "git",
3621                                          -class => "logo"}));
3622         }
3623         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3624         if (defined $project) {
3625                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3626                 if (defined $action) {
3627                         my $action_print = $action ;
3628                         if (defined $opts{-action_extra}) {
3629                                 $action_print = $cgi->a({-href => href(action=>$action)},
3630                                         $action);
3631                         }
3632                         print " / $action_print";
3633                 }
3634                 if (defined $opts{-action_extra}) {
3635                         print " / $opts{-action_extra}";
3636                 }
3637                 print "\n";
3638         }
3639         print "</div>\n";
3640
3641         my $have_search = gitweb_check_feature('search');
3642         if (defined $project && $have_search) {
3643                 if (!defined $searchtext) {
3644                         $searchtext = "";
3645                 }
3646                 my $search_hash;
3647                 if (defined $hash_base) {
3648                         $search_hash = $hash_base;
3649                 } elsif (defined $hash) {
3650                         $search_hash = $hash;
3651                 } else {
3652                         $search_hash = "HEAD";
3653                 }
3654                 my $action = $my_uri;
3655                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3656                 if ($use_pathinfo) {
3657                         $action .= "/".esc_url($project);
3658                 }
3659                 print $cgi->startform(-method => "get", -action => $action) .
3660                       "<div class=\"search\">\n" .
3661                       (!$use_pathinfo &&
3662                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3663                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3664                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3665                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3666                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3667                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3668                       " search:\n",
3669                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3670                       "<span title=\"Extended regular expression\">" .
3671                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3672                                      -checked => $search_use_regexp) .
3673                       "</span>" .
3674                       "</div>" .
3675                       $cgi->end_form() . "\n";
3676         }
3677 }
3678
3679 sub git_footer_html {
3680         my $feed_class = 'rss_logo';
3681
3682         print "<div class=\"page_footer\">\n";
3683         if (defined $project) {
3684                 my $descr = git_get_project_description($project);
3685                 if (defined $descr) {
3686                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3687                 }
3688
3689                 my %href_params = get_feed_info();
3690                 if (!%href_params) {
3691                         $feed_class .= ' generic';
3692                 }
3693                 $href_params{'-title'} ||= 'log';
3694
3695                 foreach my $format (qw(RSS Atom)) {
3696                         $href_params{'action'} = lc($format);
3697                         print $cgi->a({-href => href(%href_params),
3698                                       -title => "$href_params{'-title'} $format feed",
3699                                       -class => $feed_class}, $format)."\n";
3700                 }
3701
3702         } else {
3703                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3704                               -class => $feed_class}, "OPML") . " ";
3705                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3706                               -class => $feed_class}, "TXT") . "\n";
3707         }
3708         print "</div>\n"; # class="page_footer"
3709
3710         if (defined $t0 && gitweb_check_feature('timed')) {
3711                 print "<div id=\"generating_info\">\n";
3712                 print 'This page took '.
3713                       '<span id="generating_time" class="time_span">'.
3714                       tv_interval($t0, [ gettimeofday() ]).
3715                       ' seconds </span>'.
3716                       ' and '.
3717                       '<span id="generating_cmd">'.
3718                       $number_of_git_cmds.
3719                       '</span> git commands '.
3720                       " to generate.\n";
3721                 print "</div>\n"; # class="page_footer"
3722         }
3723
3724         if (defined $site_footer && -f $site_footer) {
3725                 insert_file($site_footer);
3726         }
3727
3728         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3729         if (defined $action &&
3730             $action eq 'blame_incremental') {
3731                 print qq!<script type="text/javascript">\n!.
3732                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3733                       qq!           "!. href() .qq!");\n!.
3734                       qq!</script>\n!;
3735         } elsif (gitweb_check_feature('javascript-actions')) {
3736                 print qq!<script type="text/javascript">\n!.
3737                       qq!window.onload = fixLinks;\n!.
3738                       qq!</script>\n!;
3739         }
3740
3741         print "</body>\n" .
3742               "</html>";
3743 }
3744
3745 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3746 # Example: die_error(404, 'Hash not found')
3747 # By convention, use the following status codes (as defined in RFC 2616):
3748 # 400: Invalid or missing CGI parameters, or
3749 #      requested object exists but has wrong type.
3750 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3751 #      this server or project.
3752 # 404: Requested object/revision/project doesn't exist.
3753 # 500: The server isn't configured properly, or
3754 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3755 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3756 # 503: The server is currently unavailable (because it is overloaded,
3757 #      or down for maintenance).  Generally, this is a temporary state.
3758 sub die_error {
3759         my $status = shift || 500;
3760         my $error = esc_html(shift) || "Internal Server Error";
3761         my $extra = shift;
3762         my %opts = @_;
3763
3764         my %http_responses = (
3765                 400 => '400 Bad Request',
3766                 403 => '403 Forbidden',
3767                 404 => '404 Not Found',
3768                 500 => '500 Internal Server Error',
3769                 503 => '503 Service Unavailable',
3770         );
3771         git_header_html($http_responses{$status}, undef, %opts);
3772         print <<EOF;
3773 <div class="page_body">
3774 <br /><br />
3775 $status - $error
3776 <br />
3777 EOF
3778         if (defined $extra) {
3779                 print "<hr />\n" .
3780                       "$extra\n";
3781         }
3782         print "</div>\n";
3783
3784         git_footer_html();
3785         goto DONE_GITWEB
3786                 unless ($opts{'-error_handler'});
3787 }
3788
3789 ## ----------------------------------------------------------------------
3790 ## functions printing or outputting HTML: navigation
3791
3792 sub git_print_page_nav {
3793         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3794         $extra = '' if !defined $extra; # pager or formats
3795
3796         my @navs = qw(summary shortlog log commit commitdiff tree);
3797         if ($suppress) {
3798                 @navs = grep { $_ ne $suppress } @navs;
3799         }
3800
3801         my %arg = map { $_ => {action=>$_} } @navs;
3802         if (defined $head) {
3803                 for (qw(commit commitdiff)) {
3804                         $arg{$_}{'hash'} = $head;
3805                 }
3806                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3807                         for (qw(shortlog log)) {
3808                                 $arg{$_}{'hash'} = $head;
3809                         }
3810                 }
3811         }
3812
3813         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3814         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3815
3816         my @actions = gitweb_get_feature('actions');
3817         my %repl = (
3818                 '%' => '%',
3819                 'n' => $project,         # project name
3820                 'f' => $git_dir,         # project path within filesystem
3821                 'h' => $treehead || '',  # current hash ('h' parameter)
3822                 'b' => $treebase || '',  # hash base ('hb' parameter)
3823         );
3824         while (@actions) {
3825                 my ($label, $link, $pos) = splice(@actions,0,3);
3826                 # insert
3827                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3828                 # munch munch
3829                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3830                 $arg{$label}{'_href'} = $link;
3831         }
3832
3833         print "<div class=\"page_nav\">\n" .
3834                 (join " | ",
3835                  map { $_ eq $current ?
3836                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3837                  } @navs);
3838         print "<br/>\n$extra<br/>\n" .
3839               "</div>\n";
3840 }
3841
3842 # returns a submenu for the nagivation of the refs views (tags, heads,
3843 # remotes) with the current view disabled and the remotes view only
3844 # available if the feature is enabled
3845 sub format_ref_views {
3846         my ($current) = @_;
3847         my @ref_views = qw{tags heads};
3848         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3849         return join " | ", map {
3850                 $_ eq $current ? $_ :
3851                 $cgi->a({-href => href(action=>$_)}, $_)
3852         } @ref_views
3853 }
3854
3855 sub format_paging_nav {
3856         my ($action, $page, $has_next_link) = @_;
3857         my $paging_nav;
3858
3859
3860         if ($page > 0) {
3861                 $paging_nav .=
3862                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3863                         " &sdot; " .
3864                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3865                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3866         } else {
3867                 $paging_nav .= "first &sdot; prev";
3868         }
3869
3870         if ($has_next_link) {
3871                 $paging_nav .= " &sdot; " .
3872                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3873                                  -accesskey => "n", -title => "Alt-n"}, "next");
3874         } else {
3875                 $paging_nav .= " &sdot; next";
3876         }
3877
3878         return $paging_nav;
3879 }
3880
3881 ## ......................................................................
3882 ## functions printing or outputting HTML: div
3883
3884 sub git_print_header_div {
3885         my ($action, $title, $hash, $hash_base) = @_;
3886         my %args = ();
3887
3888         $args{'action'} = $action;
3889         $args{'hash'} = $hash if $hash;
3890         $args{'hash_base'} = $hash_base if $hash_base;
3891
3892         print "<div class=\"header\">\n" .
3893               $cgi->a({-href => href(%args), -class => "title"},
3894               $title ? $title : $action) .
3895               "\n</div>\n";
3896 }
3897
3898 sub format_repo_url {
3899         my ($name, $url) = @_;
3900         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3901 }
3902
3903 # Group output by placing it in a DIV element and adding a header.
3904 # Options for start_div() can be provided by passing a hash reference as the
3905 # first parameter to the function.
3906 # Options to git_print_header_div() can be provided by passing an array
3907 # reference. This must follow the options to start_div if they are present.
3908 # The content can be a scalar, which is output as-is, a scalar reference, which
3909 # is output after html escaping, an IO handle passed either as *handle or
3910 # *handle{IO}, or a function reference. In the latter case all following
3911 # parameters will be taken as argument to the content function call.
3912 sub git_print_section {
3913         my ($div_args, $header_args, $content);
3914         my $arg = shift;
3915         if (ref($arg) eq 'HASH') {
3916                 $div_args = $arg;
3917                 $arg = shift;
3918         }
3919         if (ref($arg) eq 'ARRAY') {
3920                 $header_args = $arg;
3921                 $arg = shift;
3922         }
3923         $content = $arg;
3924
3925         print $cgi->start_div($div_args);
3926         git_print_header_div(@$header_args);
3927
3928         if (ref($content) eq 'CODE') {
3929                 $content->(@_);
3930         } elsif (ref($content) eq 'SCALAR') {
3931                 print esc_html($$content);
3932         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3933                 print <$content>;
3934         } elsif (!ref($content) && defined($content)) {
3935                 print $content;
3936         }
3937
3938         print $cgi->end_div;
3939 }
3940
3941 sub print_local_time {
3942         print format_local_time(@_);
3943 }
3944
3945 sub format_local_time {
3946         my $localtime = '';
3947         my %date = @_;
3948         if ($date{'hour_local'} < 6) {
3949                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3950                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3951         } else {
3952                 $localtime .= sprintf(" (%02d:%02d %s)",
3953                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3954         }
3955
3956         return $localtime;
3957 }
3958
3959 # Outputs the author name and date in long form
3960 sub git_print_authorship {
3961         my $co = shift;
3962         my %opts = @_;
3963         my $tag = $opts{-tag} || 'div';
3964         my $author = $co->{'author_name'};
3965
3966         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3967         print "<$tag class=\"author_date\">" .
3968               format_search_author($author, "author", esc_html($author)) .
3969               " [$ad{'rfc2822'}";
3970         print_local_time(%ad) if ($opts{-localtime});
3971         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3972                   . "</$tag>\n";
3973 }
3974
3975 # Outputs table rows containing the full author or committer information,
3976 # in the format expected for 'commit' view (& similar).
3977 # Parameters are a commit hash reference, followed by the list of people
3978 # to output information for. If the list is empty it defaults to both
3979 # author and committer.
3980 sub git_print_authorship_rows {
3981         my $co = shift;
3982         # too bad we can't use @people = @_ || ('author', 'committer')
3983         my @people = @_;
3984         @people = ('author', 'committer') unless @people;
3985         foreach my $who (@people) {
3986                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3987                 print "<tr><td>$who</td><td>" .
3988                       format_search_author($co->{"${who}_name"}, $who,
3989                                esc_html($co->{"${who}_name"})) . " " .
3990                       format_search_author($co->{"${who}_email"}, $who,
3991                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3992                       "</td><td rowspan=\"2\">" .
3993                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3994                       "</td></tr>\n" .
3995                       "<tr>" .
3996                       "<td></td><td> $wd{'rfc2822'}";
3997                 print_local_time(%wd);
3998                 print "</td>" .
3999                       "</tr>\n";
4000         }
4001 }
4002
4003 sub git_print_page_path {
4004         my $name = shift;
4005         my $type = shift;
4006         my $hb = shift;
4007
4008
4009         print "<div class=\"page_path\">";
4010         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4011                       -title => 'tree root'}, to_utf8("[$project]"));
4012         print " / ";
4013         if (defined $name) {
4014                 my @dirname = split '/', $name;
4015                 my $basename = pop @dirname;
4016                 my $fullname = '';
4017
4018                 foreach my $dir (@dirname) {
4019                         $fullname .= ($fullname ? '/' : '') . $dir;
4020                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4021                                                      hash_base=>$hb),
4022                                       -title => $fullname}, esc_path($dir));
4023                         print " / ";
4024                 }
4025                 if (defined $type && $type eq 'blob') {
4026                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4027                                                      hash_base=>$hb),
4028                                       -title => $name}, esc_path($basename));
4029                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4030 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4031 <script>
4032 function toggleLineNumbers() {
4033         e = document.getElementById("lineNoStyle");
4034         e2 = document.getElementById("lineNoToggle");
4035         if (e2.innerHTML == "[Hide line numbers]") {
4036                 e.innerHTML = ".linenr { display:none; }";
4037                 e2.innerHTML = "[Show line numbers]";
4038         }
4039         else {
4040                 e.innerHTML = "";
4041                 e2.innerHTML = "[Hide line numbers]";
4042         }
4043 }
4044 var style = document.createElement("style");
4045 style.setAttribute("id", "lineNoStyle");
4046 document.getElementsByTagName("head")[0].appendChild(style);
4047 toggleLineNumbers();
4048 </script>
4049 ';
4050                 } elsif (defined $type && $type eq 'tree') {
4051                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4052                                                      hash_base=>$hb),
4053                                       -title => $name}, esc_path($basename));
4054                         print " / ";
4055                 } else {
4056                         print esc_path($basename);
4057                 }
4058         }
4059         print "<br/></div>\n";
4060 }
4061
4062 sub git_print_log {
4063         my $log = shift;
4064         my %opts = @_;
4065
4066         if ($opts{'-remove_title'}) {
4067                 # remove title, i.e. first line of log
4068                 shift @$log;
4069         }
4070         # remove leading empty lines
4071         while (defined $log->[0] && $log->[0] eq "") {
4072                 shift @$log;
4073         }
4074
4075         # print log
4076         my $signoff = 0;
4077         my $empty = 0;
4078         foreach my $line (@$log) {
4079                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4080                         $signoff = 1;
4081                         $empty = 0;
4082                         if (! $opts{'-remove_signoff'}) {
4083                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4084                                 next;
4085                         } else {
4086                                 # remove signoff lines
4087                                 next;
4088                         }
4089                 } else {
4090                         $signoff = 0;
4091                 }
4092
4093                 # print only one empty line
4094                 # do not print empty line after signoff
4095                 if ($line eq "") {
4096                         next if ($empty || $signoff);
4097                         $empty = 1;
4098                 } else {
4099                         $empty = 0;
4100                 }
4101
4102                 print format_log_line_html($line) . "<br/>\n";
4103         }
4104
4105         if ($opts{'-final_empty_line'}) {
4106                 # end with single empty line
4107                 print "<br/>\n" unless $empty;
4108         }
4109 }
4110
4111 # return link target (what link points to)
4112 sub git_get_link_target {
4113         my $hash = shift;
4114         my $link_target;
4115
4116         # read link
4117         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4118                 or return;
4119         {
4120                 local $/ = undef;
4121                 $link_target = <$fd>;
4122         }
4123         close $fd
4124                 or return;
4125
4126         return $link_target;
4127 }
4128
4129 # given link target, and the directory (basedir) the link is in,
4130 # return target of link relative to top directory (top tree);
4131 # return undef if it is not possible (including absolute links).
4132 sub normalize_link_target {
4133         my ($link_target, $basedir) = @_;
4134
4135         # absolute symlinks (beginning with '/') cannot be normalized
4136         return if (substr($link_target, 0, 1) eq '/');
4137
4138         # normalize link target to path from top (root) tree (dir)
4139         my $path;
4140         if ($basedir) {
4141                 $path = $basedir . '/' . $link_target;
4142         } else {
4143                 # we are in top (root) tree (dir)
4144                 $path = $link_target;
4145         }
4146
4147         # remove //, /./, and /../
4148         my @path_parts;
4149         foreach my $part (split('/', $path)) {
4150                 # discard '.' and ''
4151                 next if (!$part || $part eq '.');
4152                 # handle '..'
4153                 if ($part eq '..') {
4154                         if (@path_parts) {
4155                                 pop @path_parts;
4156                         } else {
4157                                 # link leads outside repository (outside top dir)
4158                                 return;
4159                         }
4160                 } else {
4161                         push @path_parts, $part;
4162                 }
4163         }
4164         $path = join('/', @path_parts);
4165
4166         return $path;
4167 }
4168
4169 # print tree entry (row of git_tree), but without encompassing <tr> element
4170 sub git_print_tree_entry {
4171         my ($t, $basedir, $hash_base, $have_blame) = @_;
4172
4173         my %base_key = ();
4174         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4175
4176         # The format of a table row is: mode list link.  Where mode is
4177         # the mode of the entry, list is the name of the entry, an href,
4178         # and link is the action links of the entry.
4179
4180         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4181         if (exists $t->{'size'}) {
4182                 print "<td class=\"size\">$t->{'size'}</td>\n";
4183         }
4184         if ($t->{'type'} eq "blob") {
4185                 print "<td class=\"list\">" .
4186                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4187                                                file_name=>"$basedir$t->{'name'}", %base_key),
4188                                 -class => "list"}, esc_path($t->{'name'}));
4189                 if (S_ISLNK(oct $t->{'mode'})) {
4190                         my $link_target = git_get_link_target($t->{'hash'});
4191                         if ($link_target) {
4192                                 my $norm_target = normalize_link_target($link_target, $basedir);
4193                                 if (defined $norm_target) {
4194                                         print " -> " .
4195                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4196                                                                      file_name=>$norm_target),
4197                                                        -title => $norm_target}, esc_path($link_target));
4198                                 } else {
4199                                         print " -> " . esc_path($link_target);
4200                                 }
4201                         }
4202                 }
4203                 print "</td>\n";
4204                 print "<td class=\"link\">";
4205                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4206                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4207                               "blob");
4208                 if ($have_blame) {
4209                         print " | " .
4210                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4211                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4212                                       "blame");
4213                 }
4214                 if (defined $hash_base) {
4215                         print " | " .
4216                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4217                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4218                                       "history");
4219                 }
4220                 print " | " .
4221                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4222                                                file_name=>"$basedir$t->{'name'}")},
4223                                 "raw");
4224                 print "</td>\n";
4225
4226         } elsif ($t->{'type'} eq "tree") {
4227                 print "<td class=\"list\">";
4228                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4229                                              file_name=>"$basedir$t->{'name'}",
4230                                              %base_key)},
4231                               esc_path($t->{'name'}));
4232                 print "</td>\n";
4233                 print "<td class=\"link\">";
4234                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4235                                              file_name=>"$basedir$t->{'name'}",
4236                                              %base_key)},
4237                               "tree");
4238                 if (defined $hash_base) {
4239                         print " | " .
4240                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4241                                                      file_name=>"$basedir$t->{'name'}")},
4242                                       "history");
4243                 }
4244                 print "</td>\n";
4245         } else {
4246                 # unknown object: we can only present history for it
4247                 # (this includes 'commit' object, i.e. submodule support)
4248                 print "<td class=\"list\">" .
4249                       esc_path($t->{'name'}) .
4250                       "</td>\n";
4251                 print "<td class=\"link\">";
4252                 if (defined $hash_base) {
4253                         print $cgi->a({-href => href(action=>"history",
4254                                                      hash_base=>$hash_base,
4255                                                      file_name=>"$basedir$t->{'name'}")},
4256                                       "history");
4257                 }
4258                 print "</td>\n";
4259         }
4260 }
4261
4262 ## ......................................................................
4263 ## functions printing large fragments of HTML
4264
4265 # get pre-image filenames for merge (combined) diff
4266 sub fill_from_file_info {
4267         my ($diff, @parents) = @_;
4268
4269         $diff->{'from_file'} = [ ];
4270         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4271         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4272                 if ($diff->{'status'}[$i] eq 'R' ||
4273                     $diff->{'status'}[$i] eq 'C') {
4274                         $diff->{'from_file'}[$i] =
4275                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4276                 }
4277         }
4278
4279         return $diff;
4280 }
4281
4282 # is current raw difftree line of file deletion
4283 sub is_deleted {
4284         my $diffinfo = shift;
4285
4286         return $diffinfo->{'to_id'} eq ('0' x 40);
4287 }
4288
4289 # does patch correspond to [previous] difftree raw line
4290 # $diffinfo  - hashref of parsed raw diff format
4291 # $patchinfo - hashref of parsed patch diff format
4292 #              (the same keys as in $diffinfo)
4293 sub is_patch_split {
4294         my ($diffinfo, $patchinfo) = @_;
4295
4296         return defined $diffinfo && defined $patchinfo
4297                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4298 }
4299
4300
4301 sub git_difftree_body {
4302         my ($difftree, $hash, @parents) = @_;
4303         my ($parent) = $parents[0];
4304         my $have_blame = gitweb_check_feature('blame');
4305         print "<div class=\"list_head\">\n";
4306         if ($#{$difftree} > 10) {
4307                 print(($#{$difftree} + 1) . " files changed:\n");
4308         }
4309         print "</div>\n";
4310
4311         print "<table class=\"" .
4312               (@parents > 1 ? "combined " : "") .
4313               "diff_tree\">\n";
4314
4315         # header only for combined diff in 'commitdiff' view
4316         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4317         if ($has_header) {
4318                 # table header
4319                 print "<thead><tr>\n" .
4320                        "<th></th><th></th>\n"; # filename, patchN link
4321                 for (my $i = 0; $i < @parents; $i++) {
4322                         my $par = $parents[$i];
4323                         print "<th>" .
4324                               $cgi->a({-href => href(action=>"commitdiff",
4325                                                      hash=>$hash, hash_parent=>$par),
4326                                        -title => 'commitdiff to parent number ' .
4327                                                   ($i+1) . ': ' . substr($par,0,7)},
4328                                       $i+1) .
4329                               "&nbsp;</th>\n";
4330                 }
4331                 print "</tr></thead>\n<tbody>\n";
4332         }
4333
4334         my $alternate = 1;
4335         my $patchno = 0;
4336         foreach my $line (@{$difftree}) {
4337                 my $diff = parsed_difftree_line($line);
4338
4339                 if ($alternate) {
4340                         print "<tr class=\"dark\">\n";
4341                 } else {
4342                         print "<tr class=\"light\">\n";
4343                 }
4344                 $alternate ^= 1;
4345
4346                 if (exists $diff->{'nparents'}) { # combined diff
4347
4348                         fill_from_file_info($diff, @parents)
4349                                 unless exists $diff->{'from_file'};
4350
4351                         if (!is_deleted($diff)) {
4352                                 # file exists in the result (child) commit
4353                                 print "<td>" .
4354                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4355                                                              file_name=>$diff->{'to_file'},
4356                                                              hash_base=>$hash),
4357                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4358                                       "</td>\n";
4359                         } else {
4360                                 print "<td>" .
4361                                       esc_path($diff->{'to_file'}) .
4362                                       "</td>\n";
4363                         }
4364
4365                         if ($action eq 'commitdiff') {
4366                                 # link to patch
4367                                 $patchno++;
4368                                 print "<td class=\"link\">" .
4369                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4370                                               "patch") .
4371                                       " | " .
4372                                       "</td>\n";
4373                         }
4374
4375                         my $has_history = 0;
4376                         my $not_deleted = 0;
4377                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4378                                 my $hash_parent = $parents[$i];
4379                                 my $from_hash = $diff->{'from_id'}[$i];
4380                                 my $from_path = $diff->{'from_file'}[$i];
4381                                 my $status = $diff->{'status'}[$i];
4382
4383                                 $has_history ||= ($status ne 'A');
4384                                 $not_deleted ||= ($status ne 'D');
4385
4386                                 if ($status eq 'A') {
4387                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4388                                 } elsif ($status eq 'D') {
4389                                         print "<td class=\"link\">" .
4390                                               $cgi->a({-href => href(action=>"blob",
4391                                                                      hash_base=>$hash,
4392                                                                      hash=>$from_hash,
4393                                                                      file_name=>$from_path)},
4394                                                       "blob" . ($i+1)) .
4395                                               " | </td>\n";
4396                                 } else {
4397                                         if ($diff->{'to_id'} eq $from_hash) {
4398                                                 print "<td class=\"link nochange\">";
4399                                         } else {
4400                                                 print "<td class=\"link\">";
4401                                         }
4402                                         print $cgi->a({-href => href(action=>"blobdiff",
4403                                                                      hash=>$diff->{'to_id'},
4404                                                                      hash_parent=>$from_hash,
4405                                                                      hash_base=>$hash,
4406                                                                      hash_parent_base=>$hash_parent,
4407                                                                      file_name=>$diff->{'to_file'},
4408                                                                      file_parent=>$from_path)},
4409                                                       "diff" . ($i+1)) .
4410                                               " | </td>\n";
4411                                 }
4412                         }
4413
4414                         print "<td class=\"link\">";
4415                         if ($not_deleted) {
4416                                 print $cgi->a({-href => href(action=>"blob",
4417                                                              hash=>$diff->{'to_id'},
4418                                                              file_name=>$diff->{'to_file'},
4419                                                              hash_base=>$hash)},
4420                                               "blob");
4421                                 print " | " if ($has_history);
4422                         }
4423                         if ($has_history) {
4424                                 print $cgi->a({-href => href(action=>"history",
4425                                                              file_name=>$diff->{'to_file'},
4426                                                              hash_base=>$hash)},
4427                                               "history");
4428                         }
4429                         print "</td>\n";
4430
4431                         print "</tr>\n";
4432                         next; # instead of 'else' clause, to avoid extra indent
4433                 }
4434                 # else ordinary diff
4435
4436                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4437                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4438                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4439                         $to_mode_oct = oct $diff->{'to_mode'};
4440                         if (S_ISREG($to_mode_oct)) { # only for regular file
4441                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4442                         }
4443                         $to_file_type = file_type($diff->{'to_mode'});
4444                 }
4445                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4446                         $from_mode_oct = oct $diff->{'from_mode'};
4447                         if (S_ISREG($from_mode_oct)) { # only for regular file
4448                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4449                         }
4450                         $from_file_type = file_type($diff->{'from_mode'});
4451                 }
4452
4453                 if ($diff->{'status'} eq "A") { # created
4454                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4455                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4456                         $mode_chng   .= "]</span>";
4457                         print "<td>";
4458                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4459                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4460                                       -class => "list"}, esc_path($diff->{'file'}));
4461                         print "</td>\n";
4462                         print "<td>$mode_chng</td>\n";
4463                         print "<td class=\"link\">";
4464                         if ($action eq 'commitdiff') {
4465                                 # link to patch
4466                                 $patchno++;
4467                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4468                                               "patch") .
4469                                       " | ";
4470                         }
4471                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4472                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4473                                       "blob");
4474                         print "</td>\n";
4475
4476                 } elsif ($diff->{'status'} eq "D") { # deleted
4477                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4478                         print "<td>";
4479                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4480                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4481                                        -class => "list"}, esc_path($diff->{'file'}));
4482                         print "</td>\n";
4483                         print "<td>$mode_chng</td>\n";
4484                         print "<td class=\"link\">";
4485                         if ($action eq 'commitdiff') {
4486                                 # link to patch
4487                                 $patchno++;
4488                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4489                                               "patch") .
4490                                       " | ";
4491                         }
4492                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4493                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4494                                       "blob") . " | ";
4495                         if ($have_blame) {
4496                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4497                                                              file_name=>$diff->{'file'})},
4498                                               "blame") . " | ";
4499                         }
4500                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4501                                                      file_name=>$diff->{'file'})},
4502                                       "history");
4503                         print "</td>\n";
4504
4505                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4506                         my $mode_chnge = "";
4507                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4508                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4509                                 if ($from_file_type ne $to_file_type) {
4510                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4511                                 }
4512                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4513                                         if ($from_mode_str && $to_mode_str) {
4514                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4515                                         } elsif ($to_mode_str) {
4516                                                 $mode_chnge .= " mode: $to_mode_str";
4517                                         }
4518                                 }
4519                                 $mode_chnge .= "]</span>\n";
4520                         }
4521                         print "<td>";
4522                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4523                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4524                                       -class => "list"}, esc_path($diff->{'file'}));
4525                         print "</td>\n";
4526                         print "<td>$mode_chnge</td>\n";
4527                         print "<td class=\"link\">";
4528                         if ($action eq 'commitdiff') {
4529                                 # link to patch
4530                                 $patchno++;
4531                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4532                                               "patch") .
4533                                       " | ";
4534                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4535                                 # "commit" view and modified file (not onlu mode changed)
4536                                 print $cgi->a({-href => href(action=>"blobdiff",
4537                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4538                                                              hash_base=>$hash, hash_parent_base=>$parent,
4539                                                              file_name=>$diff->{'file'})},
4540                                               "diff") .
4541                                       " | ";
4542                         }
4543                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4544                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4545                                        "blob") . " | ";
4546                         if ($have_blame) {
4547                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4548                                                              file_name=>$diff->{'file'})},
4549                                               "blame") . " | ";
4550                         }
4551                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4552                                                      file_name=>$diff->{'file'})},
4553                                       "history");
4554                         print "</td>\n";
4555
4556                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4557                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4558                         my $nstatus = $status_name{$diff->{'status'}};
4559                         my $mode_chng = "";
4560                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4561                                 # mode also for directories, so we cannot use $to_mode_str
4562                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4563                         }
4564                         print "<td>" .
4565                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4566                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4567                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4568                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4569                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4570                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4571                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4572                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4573                               "<td class=\"link\">";
4574                         if ($action eq 'commitdiff') {
4575                                 # link to patch
4576                                 $patchno++;
4577                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4578                                               "patch") .
4579                                       " | ";
4580                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4581                                 # "commit" view and modified file (not only pure rename or copy)
4582                                 print $cgi->a({-href => href(action=>"blobdiff",
4583                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4584                                                              hash_base=>$hash, hash_parent_base=>$parent,
4585                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4586                                               "diff") .
4587                                       " | ";
4588                         }
4589                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4590                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4591                                       "blob") . " | ";
4592                         if ($have_blame) {
4593                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4594                                                              file_name=>$diff->{'to_file'})},
4595                                               "blame") . " | ";
4596                         }
4597                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4598                                                     file_name=>$diff->{'to_file'})},
4599                                       "history");
4600                         print "</td>\n";
4601
4602                 } # we should not encounter Unmerged (U) or Unknown (X) status
4603                 print "</tr>\n";
4604         }
4605         print "</tbody>" if $has_header;
4606         print "</table>\n";
4607 }
4608
4609 sub git_patchset_body {
4610         my ($fd, $difftree, $hash, @hash_parents) = @_;
4611         my ($hash_parent) = $hash_parents[0];
4612
4613         my $is_combined = (@hash_parents > 1);
4614         my $patch_idx = 0;
4615         my $patch_number = 0;
4616         my $patch_line;
4617         my $diffinfo;
4618         my $to_name;
4619         my (%from, %to);
4620
4621         print "<div class=\"patchset\">\n";
4622
4623         # skip to first patch
4624         while ($patch_line = <$fd>) {
4625                 chomp $patch_line;
4626
4627                 last if ($patch_line =~ m/^diff /);
4628         }
4629
4630  PATCH:
4631         while ($patch_line) {
4632
4633                 # parse "git diff" header line
4634                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4635                         # $1 is from_name, which we do not use
4636                         $to_name = unquote($2);
4637                         $to_name =~ s!^b/!!;
4638                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4639                         # $1 is 'cc' or 'combined', which we do not use
4640                         $to_name = unquote($2);
4641                 } else {
4642                         $to_name = undef;
4643                 }
4644
4645                 # check if current patch belong to current raw line
4646                 # and parse raw git-diff line if needed
4647                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4648                         # this is continuation of a split patch
4649                         print "<div class=\"patch cont\">\n";
4650                 } else {
4651                         # advance raw git-diff output if needed
4652                         $patch_idx++ if defined $diffinfo;
4653
4654                         # read and prepare patch information
4655                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4656
4657                         # compact combined diff output can have some patches skipped
4658                         # find which patch (using pathname of result) we are at now;
4659                         if ($is_combined) {
4660                                 while ($to_name ne $diffinfo->{'to_file'}) {
4661                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4662                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4663                                               "</div>\n";  # class="patch"
4664
4665                                         $patch_idx++;
4666                                         $patch_number++;
4667
4668                                         last if $patch_idx > $#$difftree;
4669                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4670                                 }
4671                         }
4672
4673                         # modifies %from, %to hashes
4674                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4675
4676                         # this is first patch for raw difftree line with $patch_idx index
4677                         # we index @$difftree array from 0, but number patches from 1
4678                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4679                 }
4680
4681                 # git diff header
4682                 #assert($patch_line =~ m/^diff /) if DEBUG;
4683                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4684                 $patch_number++;
4685                 # print "git diff" header
4686                 print format_git_diff_header_line($patch_line, $diffinfo,
4687                                                   \%from, \%to);
4688
4689                 # print extended diff header
4690                 print "<div class=\"diff extended_header\">\n";
4691         EXTENDED_HEADER:
4692                 while ($patch_line = <$fd>) {
4693                         chomp $patch_line;
4694
4695                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4696
4697                         print format_extended_diff_header_line($patch_line, $diffinfo,
4698                                                                \%from, \%to);
4699                 }
4700                 print "</div>\n"; # class="diff extended_header"
4701
4702                 # from-file/to-file diff header
4703                 if (! $patch_line) {
4704                         print "</div>\n"; # class="patch"
4705                         last PATCH;
4706                 }
4707                 next PATCH if ($patch_line =~ m/^diff /);
4708                 #assert($patch_line =~ m/^---/) if DEBUG;
4709
4710                 my $last_patch_line = $patch_line;
4711                 $patch_line = <$fd>;
4712                 chomp $patch_line;
4713                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4714
4715                 print format_diff_from_to_header($last_patch_line, $patch_line,
4716                                                  $diffinfo, \%from, \%to,
4717                                                  @hash_parents);
4718
4719                 # the patch itself
4720         LINE:
4721                 while ($patch_line = <$fd>) {
4722                         chomp $patch_line;
4723
4724                         next PATCH if ($patch_line =~ m/^diff /);
4725
4726                         print format_diff_line($patch_line, \%from, \%to);
4727                 }
4728
4729         } continue {
4730                 print "</div>\n"; # class="patch"
4731         }
4732
4733         # for compact combined (--cc) format, with chunk and patch simplification
4734         # the patchset might be empty, but there might be unprocessed raw lines
4735         for (++$patch_idx if $patch_number > 0;
4736              $patch_idx < @$difftree;
4737              ++$patch_idx) {
4738                 # read and prepare patch information
4739                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4740
4741                 # generate anchor for "patch" links in difftree / whatchanged part
4742                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4743                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4744                       "</div>\n";  # class="patch"
4745
4746                 $patch_number++;
4747         }
4748
4749         if ($patch_number == 0) {
4750                 if (@hash_parents > 1) {
4751                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4752                 } else {
4753                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4754                 }
4755         }
4756
4757         print "</div>\n"; # class="patchset"
4758 }
4759
4760 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4761
4762 # fills project list info (age, description, owner, forks) for each
4763 # project in the list, removing invalid projects from returned list
4764 # NOTE: modifies $projlist, but does not remove entries from it
4765 sub fill_project_list_info {
4766         my ($projlist, $check_forks) = @_;
4767         my @projects;
4768
4769         my $show_ctags = gitweb_check_feature('ctags');
4770  PROJECT:
4771         foreach my $pr (@$projlist) {
4772                 my (@activity) = git_get_last_activity($pr->{'path'});
4773                 unless (@activity) {
4774                         next PROJECT;
4775                 }
4776                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4777                 if (!defined $pr->{'descr'}) {
4778                         my $descr = git_get_project_description($pr->{'path'}) || "";
4779                         $descr = to_utf8($descr);
4780                         $pr->{'descr_long'} = $descr;
4781                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4782                 }
4783                 if (!defined $pr->{'owner'}) {
4784                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4785                 }
4786                 if ($check_forks) {
4787                         my $pname = $pr->{'path'};
4788                         if (($pname =~ s/\.git$//) &&
4789                             ($pname !~ /\/$/) &&
4790                             (-d "$projectroot/$pname")) {
4791                                 $pr->{'forks'} = "-d $projectroot/$pname";
4792                         } else {
4793                                 $pr->{'forks'} = 0;
4794                         }
4795                 }
4796                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4797                 push @projects, $pr;
4798         }
4799
4800         return @projects;
4801 }
4802
4803 # print 'sort by' <th> element, generating 'sort by $name' replay link
4804 # if that order is not selected
4805 sub print_sort_th {
4806         print format_sort_th(@_);
4807 }
4808
4809 sub format_sort_th {
4810         my ($name, $order, $header) = @_;
4811         my $sort_th = "";
4812         $header ||= ucfirst($name);
4813
4814         if ($order eq $name) {
4815                 $sort_th .= "<th>$header</th>\n";
4816         } else {
4817                 $sort_th .= "<th>" .
4818                             $cgi->a({-href => href(-replay=>1, order=>$name),
4819                                      -class => "header"}, $header) .
4820                             "</th>\n";
4821         }
4822
4823         return $sort_th;
4824 }
4825
4826 sub git_project_list_body {
4827         # actually uses global variable $project
4828         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4829
4830         my $check_forks = gitweb_check_feature('forks');
4831         my @projects = fill_project_list_info($projlist, $check_forks);
4832
4833         $order ||= $default_projects_order;
4834         $from = 0 unless defined $from;
4835         $to = $#projects if (!defined $to || $#projects < $to);
4836
4837         my %order_info = (
4838                 project => { key => 'path', type => 'str' },
4839                 descr => { key => 'descr_long', type => 'str' },
4840                 owner => { key => 'owner', type => 'str' },
4841                 age => { key => 'age', type => 'num' }
4842         );
4843         my $oi = $order_info{$order};
4844         if ($oi->{'type'} eq 'str') {
4845                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4846         } else {
4847                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4848         }
4849
4850         my $show_ctags = gitweb_check_feature('ctags');
4851         if ($show_ctags) {
4852                 my %ctags;
4853                 foreach my $p (@projects) {
4854                         foreach my $ct (keys %{$p->{'ctags'}}) {
4855                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4856                         }
4857                 }
4858                 my $cloud = git_populate_project_tagcloud(\%ctags);
4859                 print git_show_project_tagcloud($cloud, 64);
4860         }
4861
4862         print "<table class=\"project_list\">\n";
4863         unless ($no_header) {
4864                 print "<tr>\n";
4865                 if ($check_forks) {
4866                         print "<th></th>\n";
4867                 }
4868                 print_sort_th('project', $order, 'Project');
4869                 print_sort_th('descr', $order, 'Description');
4870                 print_sort_th('owner', $order, 'Owner');
4871                 print_sort_th('age', $order, 'Last Change');
4872                 print "<th></th>\n" . # for links
4873                       "</tr>\n";
4874         }
4875         my $alternate = 1;
4876         my $tagfilter = $cgi->param('by_tag');
4877         for (my $i = $from; $i <= $to; $i++) {
4878                 my $pr = $projects[$i];
4879
4880                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4881                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4882                         and not $pr->{'descr_long'} =~ /$searchtext/;
4883                 # Weed out forks or non-matching entries of search
4884                 if ($check_forks) {
4885                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4886                         $forkbase="^$forkbase" if $forkbase;
4887                         next if not $searchtext and not $tagfilter and $show_ctags
4888                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4889                 }
4890
4891                 if ($alternate) {
4892                         print "<tr class=\"dark\">\n";
4893                 } else {
4894                         print "<tr class=\"light\">\n";
4895                 }
4896                 $alternate ^= 1;
4897                 if ($check_forks) {
4898                         print "<td>";
4899                         if ($pr->{'forks'}) {
4900                                 print "<!-- $pr->{'forks'} -->\n";
4901                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4902                         }
4903                         print "</td>\n";
4904                 }
4905                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4906                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4907                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4908                                         -class => "list", -title => $pr->{'descr_long'}},
4909                                         esc_html($pr->{'descr'})) . "</td>\n" .
4910                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4911                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4912                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4913                       "<td class=\"link\">" .
4914                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4915                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4916                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4917                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4918                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4919                       "</td>\n" .
4920                       "</tr>\n";
4921         }
4922         if (defined $extra) {
4923                 print "<tr>\n";
4924                 if ($check_forks) {
4925                         print "<td></td>\n";
4926                 }
4927                 print "<td colspan=\"5\">$extra</td>\n" .
4928                       "</tr>\n";
4929         }
4930         print "</table>\n";
4931 }
4932
4933 sub git_log_body {
4934         # uses global variable $project
4935         my ($commitlist, $from, $to, $refs, $extra) = @_;
4936
4937         $from = 0 unless defined $from;
4938         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4939
4940         for (my $i = 0; $i <= $to; $i++) {
4941                 my %co = %{$commitlist->[$i]};
4942                 next if !%co;
4943                 my $commit = $co{'id'};
4944                 my $ref = format_ref_marker($refs, $commit);
4945                 git_print_header_div('commit',
4946                                "<span class=\"age\">$co{'age_string'}</span>" .
4947                                esc_html($co{'title'}) . $ref,
4948                                $commit);
4949                 print "<div class=\"title_text\">\n" .
4950                       "<div class=\"log_link\">\n" .
4951                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4952                       " | " .
4953                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4954                       " | " .
4955                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4956                       "<br/>\n" .
4957                       "</div>\n";
4958                       git_print_authorship(\%co, -tag => 'span');
4959                       print "<br/>\n</div>\n";
4960
4961                 print "<div class=\"log_body\">\n";
4962                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4963                 print "</div>\n";
4964         }
4965         if ($extra) {
4966                 print "<div class=\"page_nav\">\n";
4967                 print "$extra\n";
4968                 print "</div>\n";
4969         }
4970 }
4971
4972 sub git_shortlog_body {
4973         # uses global variable $project
4974         my ($commitlist, $from, $to, $refs, $extra) = @_;
4975
4976         $from = 0 unless defined $from;
4977         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4978
4979         print "<table class=\"shortlog\">\n";
4980         my $alternate = 1;
4981         for (my $i = $from; $i <= $to; $i++) {
4982                 my %co = %{$commitlist->[$i]};
4983                 my $commit = $co{'id'};
4984                 my $ref = format_ref_marker($refs, $commit);
4985                 if ($alternate) {
4986                         print "<tr class=\"dark\">\n";
4987                 } else {
4988                         print "<tr class=\"light\">\n";
4989                 }
4990                 $alternate ^= 1;
4991                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4992                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4993                       format_author_html('td', \%co, 10) . "<td>";
4994                 print format_subject_html($co{'title'}, $co{'title_short'},
4995                                           href(action=>"commit", hash=>$commit), $ref);
4996                 print "</td>\n" .
4997                       "<td class=\"link\">" .
4998                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4999                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5000                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5001                 my $snapshot_links = format_snapshot_links($commit);
5002                 if (defined $snapshot_links) {
5003                         print " | " . $snapshot_links;
5004                 }
5005                 print "</td>\n" .
5006                       "</tr>\n";
5007         }
5008         if (defined $extra) {
5009                 print "<tr>\n" .
5010                       "<td colspan=\"4\">$extra</td>\n" .
5011                       "</tr>\n";
5012         }
5013         print "</table>\n";
5014 }
5015
5016 sub git_history_body {
5017         # Warning: assumes constant type (blob or tree) during history
5018         my ($commitlist, $from, $to, $refs, $extra,
5019             $file_name, $file_hash, $ftype) = @_;
5020
5021         $from = 0 unless defined $from;
5022         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5023
5024         print "<table class=\"history\">\n";
5025         my $alternate = 1;
5026         for (my $i = $from; $i <= $to; $i++) {
5027                 my %co = %{$commitlist->[$i]};
5028                 if (!%co) {
5029                         next;
5030                 }
5031                 my $commit = $co{'id'};
5032
5033                 my $ref = format_ref_marker($refs, $commit);
5034
5035                 if ($alternate) {
5036                         print "<tr class=\"dark\">\n";
5037                 } else {
5038                         print "<tr class=\"light\">\n";
5039                 }
5040                 $alternate ^= 1;
5041                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5042         # shortlog:   format_author_html('td', \%co, 10)
5043                       format_author_html('td', \%co, 15, 3) . "<td>";
5044                 # originally git_history used chop_str($co{'title'}, 50)
5045                 print format_subject_html($co{'title'}, $co{'title_short'},
5046                                           href(action=>"commit", hash=>$commit), $ref);
5047                 print "</td>\n" .
5048                       "<td class=\"link\">" .
5049                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5050                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5051
5052                 if ($ftype eq 'blob') {
5053                         my $blob_current = $file_hash;
5054                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5055                         if (defined $blob_current && defined $blob_parent &&
5056                                         $blob_current ne $blob_parent) {
5057                                 print " | " .
5058                                         $cgi->a({-href => href(action=>"blobdiff",
5059                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5060                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5061                                                                file_name=>$file_name)},
5062                                                 "diff to current");
5063                         }
5064                 }
5065                 print "</td>\n" .
5066                       "</tr>\n";
5067         }
5068         if (defined $extra) {
5069                 print "<tr>\n" .
5070                       "<td colspan=\"4\">$extra</td>\n" .
5071                       "</tr>\n";
5072         }
5073         print "</table>\n";
5074 }
5075
5076 sub git_tags_body {
5077         # uses global variable $project
5078         my ($taglist, $from, $to, $extra) = @_;
5079         $from = 0 unless defined $from;
5080         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5081
5082         print "<table class=\"tags\">\n";
5083         my $alternate = 1;
5084         for (my $i = $from; $i <= $to; $i++) {
5085                 my $entry = $taglist->[$i];
5086                 my %tag = %$entry;
5087                 my $comment = $tag{'subject'};
5088                 my $comment_short;
5089                 if (defined $comment) {
5090                         $comment_short = chop_str($comment, 30, 5);
5091                 }
5092                 if ($alternate) {
5093                         print "<tr class=\"dark\">\n";
5094                 } else {
5095                         print "<tr class=\"light\">\n";
5096                 }
5097                 $alternate ^= 1;
5098                 if (defined $tag{'age'}) {
5099                         print "<td><i>$tag{'age'}</i></td>\n";
5100                 } else {
5101                         print "<td></td>\n";
5102                 }
5103                 print "<td>" .
5104                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5105                                -class => "list name"}, esc_html($tag{'name'})) .
5106                       "</td>\n" .
5107                       "<td>";
5108                 if (defined $comment) {
5109                         print format_subject_html($comment, $comment_short,
5110                                                   href(action=>"tag", hash=>$tag{'id'}));
5111                 }
5112                 print "</td>\n" .
5113                       "<td class=\"selflink\">";
5114                 if ($tag{'type'} eq "tag") {
5115                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5116                 } else {
5117                         print "&nbsp;";
5118                 }
5119                 print "</td>\n" .
5120                       "<td class=\"link\">" . " | " .
5121                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5122                 if ($tag{'reftype'} eq "commit") {
5123                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5124                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5125                 } elsif ($tag{'reftype'} eq "blob") {
5126                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5127                 }
5128                 print "</td>\n" .
5129                       "</tr>";
5130         }
5131         if (defined $extra) {
5132                 print "<tr>\n" .
5133                       "<td colspan=\"5\">$extra</td>\n" .
5134                       "</tr>\n";
5135         }
5136         print "</table>\n";
5137 }
5138
5139 sub git_heads_body {
5140         # uses global variable $project
5141         my ($headlist, $head, $from, $to, $extra) = @_;
5142         $from = 0 unless defined $from;
5143         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5144
5145         print "<table class=\"heads\">\n";
5146         my $alternate = 1;
5147         for (my $i = $from; $i <= $to; $i++) {
5148                 my $entry = $headlist->[$i];
5149                 my %ref = %$entry;
5150                 my $curr = $ref{'id'} eq $head;
5151                 if ($alternate) {
5152                         print "<tr class=\"dark\">\n";
5153                 } else {
5154                         print "<tr class=\"light\">\n";
5155                 }
5156                 $alternate ^= 1;
5157                 print "<td><i>$ref{'age'}</i></td>\n" .
5158                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5159                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5160                                -class => "list name"},esc_html($ref{'name'})) .
5161                       "</td>\n" .
5162                       "<td class=\"link\">" .
5163                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5164                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5165                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5166                       "</td>\n" .
5167                       "</tr>";
5168         }
5169         if (defined $extra) {
5170                 print "<tr>\n" .
5171                       "<td colspan=\"3\">$extra</td>\n" .
5172                       "</tr>\n";
5173         }
5174         print "</table>\n";
5175 }
5176
5177 # Display a single remote block
5178 sub git_remote_block {
5179         my ($remote, $rdata, $limit, $head) = @_;
5180
5181         my $heads = $rdata->{'heads'};
5182         my $fetch = $rdata->{'fetch'};
5183         my $push = $rdata->{'push'};
5184
5185         my $urls_table = "<table class=\"projects_list\">\n" ;
5186
5187         if (defined $fetch) {
5188                 if ($fetch eq $push) {
5189                         $urls_table .= format_repo_url("URL", $fetch);
5190                 } else {
5191                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5192                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5193                 }
5194         } elsif (defined $push) {
5195                 $urls_table .= format_repo_url("Push URL", $push);
5196         } else {
5197                 $urls_table .= format_repo_url("", "No remote URL");
5198         }
5199
5200         $urls_table .= "</table>\n";
5201
5202         my $dots;
5203         if (defined $limit && $limit < @$heads) {
5204                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5205         }
5206
5207         print $urls_table;
5208         git_heads_body($heads, $head, 0, $limit, $dots);
5209 }
5210
5211 # Display a list of remote names with the respective fetch and push URLs
5212 sub git_remotes_list {
5213         my ($remotedata, $limit) = @_;
5214         print "<table class=\"heads\">\n";
5215         my $alternate = 1;
5216         my @remotes = sort keys %$remotedata;
5217
5218         my $limited = $limit && $limit < @remotes;
5219
5220         $#remotes = $limit - 1 if $limited;
5221
5222         while (my $remote = shift @remotes) {
5223                 my $rdata = $remotedata->{$remote};
5224                 my $fetch = $rdata->{'fetch'};
5225                 my $push = $rdata->{'push'};
5226                 if ($alternate) {
5227                         print "<tr class=\"dark\">\n";
5228                 } else {
5229                         print "<tr class=\"light\">\n";
5230                 }
5231                 $alternate ^= 1;
5232                 print "<td>" .
5233                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5234                                -class=> "list name"},esc_html($remote)) .
5235                       "</td>";
5236                 print "<td class=\"link\">" .
5237                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5238                       " | " .
5239                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5240                       "</td>";
5241
5242                 print "</tr>\n";
5243         }
5244
5245         if ($limited) {
5246                 print "<tr>\n" .
5247                       "<td colspan=\"3\">" .
5248                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5249                       "</td>\n" . "</tr>\n";
5250         }
5251
5252         print "</table>";
5253 }
5254
5255 # Display remote heads grouped by remote, unless there are too many
5256 # remotes, in which case we only display the remote names
5257 sub git_remotes_body {
5258         my ($remotedata, $limit, $head) = @_;
5259         if ($limit and $limit < keys %$remotedata) {
5260                 git_remotes_list($remotedata, $limit);
5261         } else {
5262                 fill_remote_heads($remotedata);
5263                 while (my ($remote, $rdata) = each %$remotedata) {
5264                         git_print_section({-class=>"remote", -id=>$remote},
5265                                 ["remotes", $remote, $remote], sub {
5266                                         git_remote_block($remote, $rdata, $limit, $head);
5267                                 });
5268                 }
5269         }
5270 }
5271
5272 sub git_search_grep_body {
5273         my ($commitlist, $from, $to, $extra) = @_;
5274         $from = 0 unless defined $from;
5275         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5276
5277         print "<table class=\"commit_search\">\n";
5278         my $alternate = 1;
5279         for (my $i = $from; $i <= $to; $i++) {
5280                 my %co = %{$commitlist->[$i]};
5281                 if (!%co) {
5282                         next;
5283                 }
5284                 my $commit = $co{'id'};
5285                 if ($alternate) {
5286                         print "<tr class=\"dark\">\n";
5287                 } else {
5288                         print "<tr class=\"light\">\n";
5289                 }
5290                 $alternate ^= 1;
5291                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5292                       format_author_html('td', \%co, 15, 5) .
5293                       "<td>" .
5294                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5295                                -class => "list subject"},
5296                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5297                 my $comment = $co{'comment'};
5298                 foreach my $line (@$comment) {
5299                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5300                                 my ($lead, $match, $trail) = ($1, $2, $3);
5301                                 $match = chop_str($match, 70, 5, 'center');
5302                                 my $contextlen = int((80 - length($match))/2);
5303                                 $contextlen = 30 if ($contextlen > 30);
5304                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5305                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5306
5307                                 $lead  = esc_html($lead);
5308                                 $match = esc_html($match);
5309                                 $trail = esc_html($trail);
5310
5311                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5312                         }
5313                 }
5314                 print "</td>\n" .
5315                       "<td class=\"link\">" .
5316                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5317                       " | " .
5318                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5319                       " | " .
5320                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5321                 print "</td>\n" .
5322                       "</tr>\n";
5323         }
5324         if (defined $extra) {
5325                 print "<tr>\n" .
5326                       "<td colspan=\"3\">$extra</td>\n" .
5327                       "</tr>\n";
5328         }
5329         print "</table>\n";
5330 }
5331
5332 ## ======================================================================
5333 ## ======================================================================
5334 ## actions
5335
5336 sub git_project_list {
5337         my $order = $input_params{'order'};
5338         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5339                 die_error(400, "Unknown order parameter");
5340         }
5341
5342         my @list = git_get_projects_list();
5343         if (!@list) {
5344                 die_error(404, "No projects found");
5345         }
5346
5347         git_header_html();
5348         if (defined $home_text && -f $home_text) {
5349                 print "<div class=\"index_include\">\n";
5350                 insert_file($home_text);
5351                 print "</div>\n";
5352         }
5353         print $cgi->startform(-method => "get") .
5354               "<p class=\"projsearch\">Search:\n" .
5355               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5356               "</p>" .
5357               $cgi->end_form() . "\n";
5358         git_project_list_body(\@list, $order);
5359         git_footer_html();
5360 }
5361
5362 sub git_forks {
5363         my $order = $input_params{'order'};
5364         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5365                 die_error(400, "Unknown order parameter");
5366         }
5367
5368         my @list = git_get_projects_list($project);
5369         if (!@list) {
5370                 die_error(404, "No forks found");
5371         }
5372
5373         git_header_html();
5374         git_print_page_nav('','');
5375         git_print_header_div('summary', "$project forks");
5376         git_project_list_body(\@list, $order);
5377         git_footer_html();
5378 }
5379
5380 sub git_project_index {
5381         my @projects = git_get_projects_list($project);
5382
5383         print $cgi->header(
5384                 -type => 'text/plain',
5385                 -charset => 'utf-8',
5386                 -content_disposition => 'inline; filename="index.aux"');
5387
5388         foreach my $pr (@projects) {
5389                 if (!exists $pr->{'owner'}) {
5390                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5391                 }
5392
5393                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5394                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5395                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5396                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5397                 $path  =~ s/ /\+/g;
5398                 $owner =~ s/ /\+/g;
5399
5400                 print "$path $owner\n";
5401         }
5402 }
5403
5404 sub git_summary {
5405         my $descr = git_get_project_description($project) || "none";
5406         my %co = parse_commit("HEAD");
5407         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5408         my $head = $co{'id'};
5409         my $remote_heads = gitweb_check_feature('remote_heads');
5410
5411         my $owner = git_get_project_owner($project);
5412
5413         my $refs = git_get_references();
5414         # These get_*_list functions return one more to allow us to see if
5415         # there are more ...
5416         my @taglist  = git_get_tags_list(16);
5417         my @headlist = git_get_heads_list(16);
5418         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5419         my @forklist;
5420         my $check_forks = gitweb_check_feature('forks');
5421
5422         if ($check_forks) {
5423                 @forklist = git_get_projects_list($project);
5424         }
5425
5426         git_header_html();
5427         git_print_page_nav('summary','', $head);
5428
5429         print "<div class=\"title\">&nbsp;</div>\n";
5430         print "<table class=\"projects_list\">\n" .
5431               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5432               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5433         if (defined $cd{'rfc2822'}) {
5434                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5435         }
5436
5437         # use per project git URL list in $projectroot/$project/cloneurl
5438         # or make project git URL from git base URL and project name
5439         my $url_tag = "URL";
5440         my @url_list = git_get_project_url_list($project);
5441         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5442         foreach my $git_url (@url_list) {
5443                 next unless $git_url;
5444                 print format_repo_url($url_tag, $git_url);
5445                 $url_tag = "";
5446         }
5447
5448         # Tag cloud
5449         my $show_ctags = gitweb_check_feature('ctags');
5450         if ($show_ctags) {
5451                 my $ctags = git_get_project_ctags($project);
5452                 my $cloud = git_populate_project_tagcloud($ctags);
5453                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5454                 print "</td>\n<td>" unless %$ctags;
5455                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5456                 print "</td>\n<td>" if %$ctags;
5457                 print git_show_project_tagcloud($cloud, 48);
5458                 print "</td></tr>";
5459         }
5460
5461         print "</table>\n";
5462
5463         # If XSS prevention is on, we don't include README.html.
5464         # TODO: Allow a readme in some safe format.
5465         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5466                 print "<div class=\"title\">readme</div>\n" .
5467                       "<div class=\"readme\">\n";
5468                 insert_file("$projectroot/$project/README.html");
5469                 print "\n</div>\n"; # class="readme"
5470         }
5471
5472         # we need to request one more than 16 (0..15) to check if
5473         # those 16 are all
5474         my @commitlist = $head ? parse_commits($head, 17) : ();
5475         if (@commitlist) {
5476                 git_print_header_div('shortlog');
5477                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5478                                   $#commitlist <=  15 ? undef :
5479                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5480         }
5481
5482         if (@taglist) {
5483                 git_print_header_div('tags');
5484                 git_tags_body(\@taglist, 0, 15,
5485                               $#taglist <=  15 ? undef :
5486                               $cgi->a({-href => href(action=>"tags")}, "..."));
5487         }
5488
5489         if (@headlist) {
5490                 git_print_header_div('heads');
5491                 git_heads_body(\@headlist, $head, 0, 15,
5492                                $#headlist <= 15 ? undef :
5493                                $cgi->a({-href => href(action=>"heads")}, "..."));
5494         }
5495
5496         if (%remotedata) {
5497                 git_print_header_div('remotes');
5498                 git_remotes_body(\%remotedata, 15, $head);
5499         }
5500
5501         if (@forklist) {
5502                 git_print_header_div('forks');
5503                 git_project_list_body(\@forklist, 'age', 0, 15,
5504                                       $#forklist <= 15 ? undef :
5505                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5506                                       'no_header');
5507         }
5508
5509         git_footer_html();
5510 }
5511
5512 sub git_tag {
5513         my %tag = parse_tag($hash);
5514
5515         if (! %tag) {
5516                 die_error(404, "Unknown tag object");
5517         }
5518
5519         my $head = git_get_head_hash($project);
5520         git_header_html();
5521         git_print_page_nav('','', $head,undef,$head);
5522         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5523         print "<div class=\"title_text\">\n" .
5524               "<table class=\"object_header\">\n" .
5525               "<tr>\n" .
5526               "<td>object</td>\n" .
5527               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5528                                $tag{'object'}) . "</td>\n" .
5529               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5530                                               $tag{'type'}) . "</td>\n" .
5531               "</tr>\n";
5532         if (defined($tag{'author'})) {
5533                 git_print_authorship_rows(\%tag, 'author');
5534         }
5535         print "</table>\n\n" .
5536               "</div>\n";
5537         print "<div class=\"page_body\">";
5538         my $comment = $tag{'comment'};
5539         foreach my $line (@$comment) {
5540                 chomp $line;
5541                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5542         }
5543         print "</div>\n";
5544         git_footer_html();
5545 }
5546
5547 sub git_blame_common {
5548         my $format = shift || 'porcelain';
5549         if ($format eq 'porcelain' && $cgi->param('js')) {
5550                 $format = 'incremental';
5551                 $action = 'blame_incremental'; # for page title etc
5552         }
5553
5554         # permissions
5555         gitweb_check_feature('blame')
5556                 or die_error(403, "Blame view not allowed");
5557
5558         # error checking
5559         die_error(400, "No file name given") unless $file_name;
5560         $hash_base ||= git_get_head_hash($project);
5561         die_error(404, "Couldn't find base commit") unless $hash_base;
5562         my %co = parse_commit($hash_base)
5563                 or die_error(404, "Commit not found");
5564         my $ftype = "blob";
5565         if (!defined $hash) {
5566                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5567                         or die_error(404, "Error looking up file");
5568         } else {
5569                 $ftype = git_get_type($hash);
5570                 if ($ftype !~ "blob") {
5571                         die_error(400, "Object is not a blob");
5572                 }
5573         }
5574
5575         my $fd;
5576         if ($format eq 'incremental') {
5577                 # get file contents (as base)
5578                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5579                         or die_error(500, "Open git-cat-file failed");
5580         } elsif ($format eq 'data') {
5581                 # run git-blame --incremental
5582                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5583                         $hash_base, "--", $file_name
5584                         or die_error(500, "Open git-blame --incremental failed");
5585         } else {
5586                 # run git-blame --porcelain
5587                 open $fd, "-|", git_cmd(), "blame", '-p',
5588                         $hash_base, '--', $file_name
5589                         or die_error(500, "Open git-blame --porcelain failed");
5590         }
5591
5592         # incremental blame data returns early
5593         if ($format eq 'data') {
5594                 print $cgi->header(
5595                         -type=>"text/plain", -charset => "utf-8",
5596                         -status=> "200 OK");
5597                 local $| = 1; # output autoflush
5598                 print while <$fd>;
5599                 close $fd
5600                         or print "ERROR $!\n";
5601
5602                 print 'END';
5603                 if (defined $t0 && gitweb_check_feature('timed')) {
5604                         print ' '.
5605                               tv_interval($t0, [ gettimeofday() ]).
5606                               ' '.$number_of_git_cmds;
5607                 }
5608                 print "\n";
5609
5610                 return;
5611         }
5612
5613         # page header
5614         git_header_html();
5615         my $formats_nav =
5616                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5617                         "blob") .
5618                 " | ";
5619         if ($format eq 'incremental') {
5620                 $formats_nav .=
5621                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5622                                 "blame") . " (non-incremental)";
5623         } else {
5624                 $formats_nav .=
5625                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5626                                 "blame") . " (incremental)";
5627         }
5628         $formats_nav .=
5629                 " | " .
5630                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5631                         "history") .
5632                 " | " .
5633                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5634                         "HEAD");
5635         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5636         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5637         git_print_page_path($file_name, $ftype, $hash_base);
5638
5639         # page body
5640         if ($format eq 'incremental') {
5641                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5642                       "This page requires JavaScript to run.\n Use ".
5643                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5644                               'this page').
5645                       " instead.\n".
5646                       "</b></center></div>\n</noscript>\n";
5647
5648                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5649         }
5650
5651         print qq!<div class="page_body">\n!;
5652         print qq!<div id="progress_info">... / ...</div>\n!
5653                 if ($format eq 'incremental');
5654         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5655               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5656               qq!<thead>\n!.
5657               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5658               qq!</thead>\n!.
5659               qq!<tbody>\n!;
5660
5661         my @rev_color = qw(light dark);
5662         my $num_colors = scalar(@rev_color);
5663         my $current_color = 0;
5664
5665         if ($format eq 'incremental') {
5666                 my $color_class = $rev_color[$current_color];
5667
5668                 #contents of a file
5669                 my $linenr = 0;
5670         LINE:
5671                 while (my $line = <$fd>) {
5672                         chomp $line;
5673                         $linenr++;
5674
5675                         print qq!<tr id="l$linenr" class="$color_class">!.
5676                               qq!<td class="sha1"><a href=""> </a></td>!.
5677                               qq!<td class="linenr">!.
5678                               qq!<a class="linenr" href="">$linenr</a></td>!;
5679                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5680                         print qq!</tr>\n!;
5681                 }
5682
5683         } else { # porcelain, i.e. ordinary blame
5684                 my %metainfo = (); # saves information about commits
5685
5686                 # blame data
5687         LINE:
5688                 while (my $line = <$fd>) {
5689                         chomp $line;
5690                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5691                         # no <lines in group> for subsequent lines in group of lines
5692                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5693                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5694                         if (!exists $metainfo{$full_rev}) {
5695                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5696                         }
5697                         my $meta = $metainfo{$full_rev};
5698                         my $data;
5699                         while ($data = <$fd>) {
5700                                 chomp $data;
5701                                 last if ($data =~ s/^\t//); # contents of line
5702                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5703                                         $meta->{$1} = $2 unless exists $meta->{$1};
5704                                 }
5705                                 if ($data =~ /^previous /) {
5706                                         $meta->{'nprevious'}++;
5707                                 }
5708                         }
5709                         my $short_rev = substr($full_rev, 0, 8);
5710                         my $author = $meta->{'author'};
5711                         my %date =
5712                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5713                         my $date = $date{'iso-tz'};
5714                         if ($group_size) {
5715                                 $current_color = ($current_color + 1) % $num_colors;
5716                         }
5717                         my $tr_class = $rev_color[$current_color];
5718                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5719                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5720                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5721                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5722                         if ($group_size) {
5723                                 print "<td class=\"sha1\"";
5724                                 print " title=\"". esc_html($author) . ", $date\"";
5725                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5726                                 print ">";
5727                                 print $cgi->a({-href => href(action=>"commit",
5728                                                              hash=>$full_rev,
5729                                                              file_name=>$file_name)},
5730                                               esc_html($short_rev));
5731                                 if ($group_size >= 2) {
5732                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5733                                         if (@author_initials) {
5734                                                 print "<br />" .
5735                                                       esc_html(join('', @author_initials));
5736                                                 #           or join('.', ...)
5737                                         }
5738                                 }
5739                                 print "</td>\n";
5740                         }
5741                         # 'previous' <sha1 of parent commit> <filename at commit>
5742                         if (exists $meta->{'previous'} &&
5743                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5744                                 $meta->{'parent'} = $1;
5745                                 $meta->{'file_parent'} = unquote($2);
5746                         }
5747                         my $linenr_commit =
5748                                 exists($meta->{'parent'}) ?
5749                                 $meta->{'parent'} : $full_rev;
5750                         my $linenr_filename =
5751                                 exists($meta->{'file_parent'}) ?
5752                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5753                         my $blamed = href(action => 'blame',
5754                                           file_name => $linenr_filename,
5755                                           hash_base => $linenr_commit);
5756                         print "<td class=\"linenr\">";
5757                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5758                                         -class => "linenr" },
5759                                       esc_html($lineno));
5760                         print "</td>";
5761                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5762                         print "</tr>\n";
5763                 } # end while
5764
5765         }
5766
5767         # footer
5768         print "</tbody>\n".
5769               "</table>\n"; # class="blame"
5770         print "</div>\n";   # class="blame_body"
5771         close $fd
5772                 or print "Reading blob failed\n";
5773
5774         git_footer_html();
5775 }
5776
5777 sub git_blame {
5778         git_blame_common();
5779 }
5780
5781 sub git_blame_incremental {
5782         git_blame_common('incremental');
5783 }
5784
5785 sub git_blame_data {
5786         git_blame_common('data');
5787 }
5788
5789 sub git_tags {
5790         my $head = git_get_head_hash($project);
5791         git_header_html();
5792         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5793         git_print_header_div('summary', $project);
5794
5795         my @tagslist = git_get_tags_list();
5796         if (@tagslist) {
5797                 git_tags_body(\@tagslist);
5798         }
5799         git_footer_html();
5800 }
5801
5802 sub git_heads {
5803         my $head = git_get_head_hash($project);
5804         git_header_html();
5805         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5806         git_print_header_div('summary', $project);
5807
5808         my @headslist = git_get_heads_list();
5809         if (@headslist) {
5810                 git_heads_body(\@headslist, $head);
5811         }
5812         git_footer_html();
5813 }
5814
5815 # used both for single remote view and for list of all the remotes
5816 sub git_remotes {
5817         gitweb_check_feature('remote_heads')
5818                 or die_error(403, "Remote heads view is disabled");
5819
5820         my $head = git_get_head_hash($project);
5821         my $remote = $input_params{'hash'};
5822
5823         my $remotedata = git_get_remotes_list($remote);
5824         die_error(500, "Unable to get remote information") unless defined $remotedata;
5825
5826         unless (%$remotedata) {
5827                 die_error(404, defined $remote ?
5828                         "Remote $remote not found" :
5829                         "No remotes found");
5830         }
5831
5832         git_header_html(undef, undef, -action_extra => $remote);
5833         git_print_page_nav('', '',  $head, undef, $head,
5834                 format_ref_views($remote ? '' : 'remotes'));
5835
5836         fill_remote_heads($remotedata);
5837         if (defined $remote) {
5838                 git_print_header_div('remotes', "$remote remote for $project");
5839                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5840         } else {
5841                 git_print_header_div('summary', "$project remotes");
5842                 git_remotes_body($remotedata, undef, $head);
5843         }
5844
5845         git_footer_html();
5846 }
5847
5848 sub git_blob_plain {
5849         my $type = shift;
5850         my $expires;
5851
5852         if (!defined $hash) {
5853                 if (defined $file_name) {
5854                         my $base = $hash_base || git_get_head_hash($project);
5855                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5856                                 or die_error(404, "Cannot find file");
5857                 } else {
5858                         die_error(400, "No file name defined");
5859                 }
5860         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5861                 # blobs defined by non-textual hash id's can be cached
5862                 $expires = "+1d";
5863         }
5864
5865         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5866                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5867
5868         # content-type (can include charset)
5869         $type = blob_contenttype($fd, $file_name, $type);
5870
5871         # "save as" filename, even when no $file_name is given
5872         my $save_as = "$hash";
5873         if (defined $file_name) {
5874                 $save_as = $file_name;
5875         } elsif ($type =~ m/^text\//) {
5876                 $save_as .= '.txt';
5877         }
5878
5879         # With XSS prevention on, blobs of all types except a few known safe
5880         # ones are served with "Content-Disposition: attachment" to make sure
5881         # they don't run in our security domain.  For certain image types,
5882         # blob view writes an <img> tag referring to blob_plain view, and we
5883         # want to be sure not to break that by serving the image as an
5884         # attachment (though Firefox 3 doesn't seem to care).
5885         my $sandbox = $prevent_xss &&
5886                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5887
5888         print $cgi->header(
5889                 -type => $type,
5890                 -expires => $expires,
5891                 -content_disposition =>
5892                         ($sandbox ? 'attachment' : 'inline')
5893                         . '; filename="' . $save_as . '"');
5894         local $/ = undef;
5895         binmode STDOUT, ':raw';
5896         print <$fd>;
5897         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5898         close $fd;
5899 }
5900
5901 sub git_blob {
5902         my $expires;
5903
5904         if (!defined $hash) {
5905                 if (defined $file_name) {
5906                         my $base = $hash_base || git_get_head_hash($project);
5907                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5908                                 or die_error(404, "Cannot find file");
5909                 } else {
5910                         die_error(400, "No file name defined");
5911                 }
5912         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5913                 # blobs defined by non-textual hash id's can be cached
5914                 $expires = "+1d";
5915         }
5916
5917         my $have_blame = gitweb_check_feature('blame');
5918         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5919                 or die_error(500, "Couldn't cat $file_name, $hash");
5920         my $mimetype = blob_mimetype($fd, $file_name);
5921         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5922         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5923                 close $fd;
5924                 return git_blob_plain($mimetype);
5925         }
5926         # we can have blame only for text/* mimetype
5927         $have_blame &&= ($mimetype =~ m!^text/!);
5928
5929         my $highlight = gitweb_check_feature('highlight');
5930         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5931         $fd = run_highlighter($fd, $highlight, $syntax)
5932                 if $syntax;
5933
5934         git_header_html(undef, $expires);
5935         my $formats_nav = '';
5936         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5937                 if (defined $file_name) {
5938                         if ($have_blame) {
5939                                 $formats_nav .=
5940                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5941                                                 "blame") .
5942                                         " | ";
5943                         }
5944                         $formats_nav .=
5945                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5946                                         "history") .
5947                                 " | " .
5948                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5949                                         "raw") .
5950                                 " | " .
5951                                 $cgi->a({-href => href(action=>"blob",
5952                                                        hash_base=>"HEAD", file_name=>$file_name)},
5953                                         "HEAD");
5954                 } else {
5955                         $formats_nav .=
5956                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5957                                         "raw");
5958                 }
5959                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5960                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5961         } else {
5962                 print "<div class=\"page_nav\">\n" .
5963                       "<br/><br/></div>\n" .
5964                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5965         }
5966         git_print_page_path($file_name, "blob", $hash_base);
5967         print "<div class=\"page_body\">\n";
5968         if ($mimetype =~ m!^image/!) {
5969                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5970                 if ($file_name) {
5971                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5972                 }
5973                 print qq! src="! .
5974                       href(action=>"blob_plain", hash=>$hash,
5975                            hash_base=>$hash_base, file_name=>$file_name) .
5976                       qq!" />\n!;
5977         } else {
5978                 my $nr;
5979                 while (my $line = <$fd>) {
5980                         chomp $line;
5981                         $nr++;
5982                         $line = untabify($line);
5983                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5984                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5985                 }
5986         }
5987         close $fd
5988                 or print "Reading blob failed.\n";
5989         print "</div>";
5990         git_footer_html();
5991 }
5992
5993 sub git_tree {
5994         if (!defined $hash_base) {
5995                 $hash_base = "HEAD";
5996         }
5997         if (!defined $hash) {
5998                 if (defined $file_name) {
5999                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6000                 } else {
6001                         $hash = $hash_base;
6002                 }
6003         }
6004         die_error(404, "No such tree") unless defined($hash);
6005
6006         my $show_sizes = gitweb_check_feature('show-sizes');
6007         my $have_blame = gitweb_check_feature('blame');
6008
6009         my @entries = ();
6010         {
6011                 local $/ = "\0";
6012                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6013                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6014                         or die_error(500, "Open git-ls-tree failed");
6015                 @entries = map { chomp; $_ } <$fd>;
6016                 close $fd
6017                         or die_error(404, "Reading tree failed");
6018         }
6019
6020         my $refs = git_get_references();
6021         my $ref = format_ref_marker($refs, $hash_base);
6022         git_header_html();
6023         my $basedir = '';
6024         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6025                 my @views_nav = ();
6026                 if (defined $file_name) {
6027                         push @views_nav,
6028                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6029                                         "history"),
6030                                 $cgi->a({-href => href(action=>"tree",
6031                                                        hash_base=>"HEAD", file_name=>$file_name)},
6032                                         "HEAD"),
6033                 }
6034                 my $snapshot_links = format_snapshot_links($hash);
6035                 if (defined $snapshot_links) {
6036                         # FIXME: Should be available when we have no hash base as well.
6037                         push @views_nav, $snapshot_links;
6038                 }
6039                 git_print_page_nav('tree','', $hash_base, undef, undef,
6040                                    join(' | ', @views_nav));
6041                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6042         } else {
6043                 undef $hash_base;
6044                 print "<div class=\"page_nav\">\n";
6045                 print "<br/><br/></div>\n";
6046                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6047         }
6048         if (defined $file_name) {
6049                 $basedir = $file_name;
6050                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6051                         $basedir .= '/';
6052                 }
6053                 git_print_page_path($file_name, 'tree', $hash_base);
6054         }
6055         print "<div class=\"page_body\">\n";
6056         print "<table class=\"tree\">\n";
6057         my $alternate = 1;
6058         # '..' (top directory) link if possible
6059         if (defined $hash_base &&
6060             defined $file_name && $file_name =~ m![^/]+$!) {
6061                 if ($alternate) {
6062                         print "<tr class=\"dark\">\n";
6063                 } else {
6064                         print "<tr class=\"light\">\n";
6065                 }
6066                 $alternate ^= 1;
6067
6068                 my $up = $file_name;
6069                 $up =~ s!/?[^/]+$!!;
6070                 undef $up unless $up;
6071                 # based on git_print_tree_entry
6072                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6073                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6074                 print '<td class="list">';
6075                 print $cgi->a({-href => href(action=>"tree",
6076                                              hash_base=>$hash_base,
6077                                              file_name=>$up)},
6078                               "..");
6079                 print "</td>\n";
6080                 print "<td class=\"link\"></td>\n";
6081
6082                 print "</tr>\n";
6083         }
6084         foreach my $line (@entries) {
6085                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6086
6087                 if ($alternate) {
6088                         print "<tr class=\"dark\">\n";
6089                 } else {
6090                         print "<tr class=\"light\">\n";
6091                 }
6092                 $alternate ^= 1;
6093
6094                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6095
6096                 print "</tr>\n";
6097         }
6098         print "</table>\n" .
6099               "</div>";
6100         git_footer_html();
6101 }
6102
6103 sub snapshot_name {
6104         my ($project, $hash) = @_;
6105
6106         # path/to/project.git  -> project
6107         # path/to/project/.git -> project
6108         my $name = to_utf8($project);
6109         $name =~ s,([^/])/*\.git$,$1,;
6110         $name = basename($name);
6111         # sanitize name
6112         $name =~ s/[[:cntrl:]]/?/g;
6113
6114         my $ver = $hash;
6115         if ($hash =~ /^[0-9a-fA-F]+$/) {
6116                 # shorten SHA-1 hash
6117                 my $full_hash = git_get_full_hash($project, $hash);
6118                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6119                         $ver = git_get_short_hash($project, $hash);
6120                 }
6121         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6122                 # tags don't need shortened SHA-1 hash
6123                 $ver = $1;
6124         } else {
6125                 # branches and other need shortened SHA-1 hash
6126                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6127                         $ver = $1;
6128                 }
6129                 $ver .= '-' . git_get_short_hash($project, $hash);
6130         }
6131         # in case of hierarchical branch names
6132         $ver =~ s!/!.!g;
6133
6134         # name = project-version_string
6135         $name = "$name-$ver";
6136
6137         return wantarray ? ($name, $name) : $name;
6138 }
6139
6140 sub git_snapshot {
6141         my $format = $input_params{'snapshot_format'};
6142         if (!@snapshot_fmts) {
6143                 die_error(403, "Snapshots not allowed");
6144         }
6145         # default to first supported snapshot format
6146         $format ||= $snapshot_fmts[0];
6147         if ($format !~ m/^[a-z0-9]+$/) {
6148                 die_error(400, "Invalid snapshot format parameter");
6149         } elsif (!exists($known_snapshot_formats{$format})) {
6150                 die_error(400, "Unknown snapshot format");
6151         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6152                 die_error(403, "Snapshot format not allowed");
6153         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6154                 die_error(403, "Unsupported snapshot format");
6155         }
6156
6157         my $type = git_get_type("$hash^{}");
6158         if (!$type) {
6159                 die_error(404, 'Object does not exist');
6160         }  elsif ($type eq 'blob') {
6161                 die_error(400, 'Object is not a tree-ish');
6162         }
6163
6164         my ($name, $prefix) = snapshot_name($project, $hash);
6165         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6166         my $cmd = quote_command(
6167                 git_cmd(), 'archive',
6168                 "--format=$known_snapshot_formats{$format}{'format'}",
6169                 "--prefix=$prefix/", $hash);
6170         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6171                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6172         }
6173
6174         $filename =~ s/(["\\])/\\$1/g;
6175         print $cgi->header(
6176                 -type => $known_snapshot_formats{$format}{'type'},
6177                 -content_disposition => 'inline; filename="' . $filename . '"',
6178                 -status => '200 OK');
6179
6180         open my $fd, "-|", $cmd
6181                 or die_error(500, "Execute git-archive failed");
6182         binmode STDOUT, ':raw';
6183         print <$fd>;
6184         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6185         close $fd;
6186 }
6187
6188 sub git_log_generic {
6189         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6190
6191         my $head = git_get_head_hash($project);
6192         if (!defined $base) {
6193                 $base = $head;
6194         }
6195         if (!defined $page) {
6196                 $page = 0;
6197         }
6198         my $refs = git_get_references();
6199
6200         my $commit_hash = $base;
6201         if (defined $parent) {
6202                 $commit_hash = "$parent..$base";
6203         }
6204         my @commitlist =
6205                 parse_commits($commit_hash, 101, (100 * $page),
6206                               defined $file_name ? ($file_name, "--full-history") : ());
6207
6208         my $ftype;
6209         if (!defined $file_hash && defined $file_name) {
6210                 # some commits could have deleted file in question,
6211                 # and not have it in tree, but one of them has to have it
6212                 for (my $i = 0; $i < @commitlist; $i++) {
6213                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6214                         last if defined $file_hash;
6215                 }
6216         }
6217         if (defined $file_hash) {
6218                 $ftype = git_get_type($file_hash);
6219         }
6220         if (defined $file_name && !defined $ftype) {
6221                 die_error(500, "Unknown type of object");
6222         }
6223         my %co;
6224         if (defined $file_name) {
6225                 %co = parse_commit($base)
6226                         or die_error(404, "Unknown commit object");
6227         }
6228
6229
6230         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6231         my $next_link = '';
6232         if ($#commitlist >= 100) {
6233                 $next_link =
6234                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6235                                  -accesskey => "n", -title => "Alt-n"}, "next");
6236         }
6237         my $patch_max = gitweb_get_feature('patches');
6238         if ($patch_max && !defined $file_name) {
6239                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6240                         $paging_nav .= " &sdot; " .
6241                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6242                                         "patches");
6243                 }
6244         }
6245
6246         git_header_html();
6247         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6248         if (defined $file_name) {
6249                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6250         } else {
6251                 git_print_header_div('summary', $project)
6252         }
6253         git_print_page_path($file_name, $ftype, $hash_base)
6254                 if (defined $file_name);
6255
6256         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6257                      $file_name, $file_hash, $ftype);
6258
6259         git_footer_html();
6260 }
6261
6262 sub git_log {
6263         git_log_generic('log', \&git_log_body,
6264                         $hash, $hash_parent);
6265 }
6266
6267 sub git_commit {
6268         $hash ||= $hash_base || "HEAD";
6269         my %co = parse_commit($hash)
6270             or die_error(404, "Unknown commit object");
6271
6272         my $parent  = $co{'parent'};
6273         my $parents = $co{'parents'}; # listref
6274
6275         # we need to prepare $formats_nav before any parameter munging
6276         my $formats_nav;
6277         if (!defined $parent) {
6278                 # --root commitdiff
6279                 $formats_nav .= '(initial)';
6280         } elsif (@$parents == 1) {
6281                 # single parent commit
6282                 $formats_nav .=
6283                         '(parent: ' .
6284                         $cgi->a({-href => href(action=>"commit",
6285                                                hash=>$parent)},
6286                                 esc_html(substr($parent, 0, 7))) .
6287                         ')';
6288         } else {
6289                 # merge commit
6290                 $formats_nav .=
6291                         '(merge: ' .
6292                         join(' ', map {
6293                                 $cgi->a({-href => href(action=>"commit",
6294                                                        hash=>$_)},
6295                                         esc_html(substr($_, 0, 7)));
6296                         } @$parents ) .
6297                         ')';
6298         }
6299         if (gitweb_check_feature('patches') && @$parents <= 1) {
6300                 $formats_nav .= " | " .
6301                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6302                                 "patch");
6303         }
6304
6305         if (!defined $parent) {
6306                 $parent = "--root";
6307         }
6308         my @difftree;
6309         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6310                 @diff_opts,
6311                 (@$parents <= 1 ? $parent : '-c'),
6312                 $hash, "--"
6313                 or die_error(500, "Open git-diff-tree failed");
6314         @difftree = map { chomp; $_ } <$fd>;
6315         close $fd or die_error(404, "Reading git-diff-tree failed");
6316
6317         # non-textual hash id's can be cached
6318         my $expires;
6319         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6320                 $expires = "+1d";
6321         }
6322         my $refs = git_get_references();
6323         my $ref = format_ref_marker($refs, $co{'id'});
6324
6325         git_header_html(undef, $expires);
6326         git_print_page_nav('commit', '',
6327                            $hash, $co{'tree'}, $hash,
6328                            $formats_nav);
6329
6330         if (defined $co{'parent'}) {
6331                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6332         } else {
6333                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6334         }
6335         print "<div class=\"title_text\">\n" .
6336               "<table class=\"object_header\">\n";
6337         git_print_authorship_rows(\%co);
6338         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6339         print "<tr>" .
6340               "<td>tree</td>" .
6341               "<td class=\"sha1\">" .
6342               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6343                        class => "list"}, $co{'tree'}) .
6344               "</td>" .
6345               "<td class=\"link\">" .
6346               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6347                       "tree");
6348         my $snapshot_links = format_snapshot_links($hash);
6349         if (defined $snapshot_links) {
6350                 print " | " . $snapshot_links;
6351         }
6352         print "</td>" .
6353               "</tr>\n";
6354
6355         foreach my $par (@$parents) {
6356                 print "<tr>" .
6357                       "<td>parent</td>" .
6358                       "<td class=\"sha1\">" .
6359                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6360                                class => "list"}, $par) .
6361                       "</td>" .
6362                       "<td class=\"link\">" .
6363                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6364                       " | " .
6365                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6366                       "</td>" .
6367                       "</tr>\n";
6368         }
6369         print "</table>".
6370               "</div>\n";
6371
6372         print "<div class=\"page_body\">\n";
6373         git_print_log($co{'comment'});
6374         print "</div>\n";
6375
6376         git_difftree_body(\@difftree, $hash, @$parents);
6377
6378         git_footer_html();
6379 }
6380
6381 sub git_object {
6382         # object is defined by:
6383         # - hash or hash_base alone
6384         # - hash_base and file_name
6385         my $type;
6386
6387         # - hash or hash_base alone
6388         if ($hash || ($hash_base && !defined $file_name)) {
6389                 my $object_id = $hash || $hash_base;
6390
6391                 open my $fd, "-|", quote_command(
6392                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6393                         or die_error(404, "Object does not exist");
6394                 $type = <$fd>;
6395                 chomp $type;
6396                 close $fd
6397                         or die_error(404, "Object does not exist");
6398
6399         # - hash_base and file_name
6400         } elsif ($hash_base && defined $file_name) {
6401                 $file_name =~ s,/+$,,;
6402
6403                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6404                         or die_error(404, "Base object does not exist");
6405
6406                 # here errors should not hapen
6407                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6408                         or die_error(500, "Open git-ls-tree failed");
6409                 my $line = <$fd>;
6410                 close $fd;
6411
6412                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6413                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6414                         die_error(404, "File or directory for given base does not exist");
6415                 }
6416                 $type = $2;
6417                 $hash = $3;
6418         } else {
6419                 die_error(400, "Not enough information to find object");
6420         }
6421
6422         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6423                                           hash=>$hash, hash_base=>$hash_base,
6424                                           file_name=>$file_name),
6425                              -status => '302 Found');
6426 }
6427
6428 sub git_blobdiff {
6429         my $format = shift || 'html';
6430
6431         my $fd;
6432         my @difftree;
6433         my %diffinfo;
6434         my $expires;
6435
6436         # preparing $fd and %diffinfo for git_patchset_body
6437         # new style URI
6438         if (defined $hash_base && defined $hash_parent_base) {
6439                 if (defined $file_name) {
6440                         # read raw output
6441                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6442                                 $hash_parent_base, $hash_base,
6443                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6444                                 or die_error(500, "Open git-diff-tree failed");
6445                         @difftree = map { chomp; $_ } <$fd>;
6446                         close $fd
6447                                 or die_error(404, "Reading git-diff-tree failed");
6448                         @difftree
6449                                 or die_error(404, "Blob diff not found");
6450
6451                 } elsif (defined $hash &&
6452                          $hash =~ /[0-9a-fA-F]{40}/) {
6453                         # try to find filename from $hash
6454
6455                         # read filtered raw output
6456                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6457                                 $hash_parent_base, $hash_base, "--"
6458                                 or die_error(500, "Open git-diff-tree failed");
6459                         @difftree =
6460                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6461                                 # $hash == to_id
6462                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6463                                 map { chomp; $_ } <$fd>;
6464                         close $fd
6465                                 or die_error(404, "Reading git-diff-tree failed");
6466                         @difftree
6467                                 or die_error(404, "Blob diff not found");
6468
6469                 } else {
6470                         die_error(400, "Missing one of the blob diff parameters");
6471                 }
6472
6473                 if (@difftree > 1) {
6474                         die_error(400, "Ambiguous blob diff specification");
6475                 }
6476
6477                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6478                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6479                 $file_name   ||= $diffinfo{'to_file'};
6480
6481                 $hash_parent ||= $diffinfo{'from_id'};
6482                 $hash        ||= $diffinfo{'to_id'};
6483
6484                 # non-textual hash id's can be cached
6485                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6486                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6487                         $expires = '+1d';
6488                 }
6489
6490                 # open patch output
6491                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6492                         '-p', ($format eq 'html' ? "--full-index" : ()),
6493                         $hash_parent_base, $hash_base,
6494                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6495                         or die_error(500, "Open git-diff-tree failed");
6496         }
6497
6498         # old/legacy style URI -- not generated anymore since 1.4.3.
6499         if (!%diffinfo) {
6500                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6501         }
6502
6503         # header
6504         if ($format eq 'html') {
6505                 my $formats_nav =
6506                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6507                                 "raw");
6508                 git_header_html(undef, $expires);
6509                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6510                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6511                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6512                 } else {
6513                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6514                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6515                 }
6516                 if (defined $file_name) {
6517                         git_print_page_path($file_name, "blob", $hash_base);
6518                 } else {
6519                         print "<div class=\"page_path\"></div>\n";
6520                 }
6521
6522         } elsif ($format eq 'plain') {
6523                 print $cgi->header(
6524                         -type => 'text/plain',
6525                         -charset => 'utf-8',
6526                         -expires => $expires,
6527                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6528
6529                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6530
6531         } else {
6532                 die_error(400, "Unknown blobdiff format");
6533         }
6534
6535         # patch
6536         if ($format eq 'html') {
6537                 print "<div class=\"page_body\">\n";
6538
6539                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6540                 close $fd;
6541
6542                 print "</div>\n"; # class="page_body"
6543                 git_footer_html();
6544
6545         } else {
6546                 while (my $line = <$fd>) {
6547                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6548                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6549
6550                         print $line;
6551
6552                         last if $line =~ m!^\+\+\+!;
6553                 }
6554                 local $/ = undef;
6555                 print <$fd>;
6556                 close $fd;
6557         }
6558 }
6559
6560 sub git_blobdiff_plain {
6561         git_blobdiff('plain');
6562 }
6563
6564 sub git_commitdiff {
6565         my %params = @_;
6566         my $format = $params{-format} || 'html';
6567
6568         my ($patch_max) = gitweb_get_feature('patches');
6569         if ($format eq 'patch') {
6570                 die_error(403, "Patch view not allowed") unless $patch_max;
6571         }
6572
6573         $hash ||= $hash_base || "HEAD";
6574         my %co = parse_commit($hash)
6575             or die_error(404, "Unknown commit object");
6576
6577         # choose format for commitdiff for merge
6578         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6579                 $hash_parent = '--cc';
6580         }
6581         # we need to prepare $formats_nav before almost any parameter munging
6582         my $formats_nav;
6583         if ($format eq 'html') {
6584                 $formats_nav =
6585                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6586                                 "raw");
6587                 if ($patch_max && @{$co{'parents'}} <= 1) {
6588                         $formats_nav .= " | " .
6589                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6590                                         "patch");
6591                 }
6592
6593                 if (defined $hash_parent &&
6594                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6595                         # commitdiff with two commits given
6596                         my $hash_parent_short = $hash_parent;
6597                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6598                                 $hash_parent_short = substr($hash_parent, 0, 7);
6599                         }
6600                         $formats_nav .=
6601                                 ' (from';
6602                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6603                                 if ($co{'parents'}[$i] eq $hash_parent) {
6604                                         $formats_nav .= ' parent ' . ($i+1);
6605                                         last;
6606                                 }
6607                         }
6608                         $formats_nav .= ': ' .
6609                                 $cgi->a({-href => href(action=>"commitdiff",
6610                                                        hash=>$hash_parent)},
6611                                         esc_html($hash_parent_short)) .
6612                                 ')';
6613                 } elsif (!$co{'parent'}) {
6614                         # --root commitdiff
6615                         $formats_nav .= ' (initial)';
6616                 } elsif (scalar @{$co{'parents'}} == 1) {
6617                         # single parent commit
6618                         $formats_nav .=
6619                                 ' (parent: ' .
6620                                 $cgi->a({-href => href(action=>"commitdiff",
6621                                                        hash=>$co{'parent'})},
6622                                         esc_html(substr($co{'parent'}, 0, 7))) .
6623                                 ')';
6624                 } else {
6625                         # merge commit
6626                         if ($hash_parent eq '--cc') {
6627                                 $formats_nav .= ' | ' .
6628                                         $cgi->a({-href => href(action=>"commitdiff",
6629                                                                hash=>$hash, hash_parent=>'-c')},
6630                                                 'combined');
6631                         } else { # $hash_parent eq '-c'
6632                                 $formats_nav .= ' | ' .
6633                                         $cgi->a({-href => href(action=>"commitdiff",
6634                                                                hash=>$hash, hash_parent=>'--cc')},
6635                                                 'compact');
6636                         }
6637                         $formats_nav .=
6638                                 ' (merge: ' .
6639                                 join(' ', map {
6640                                         $cgi->a({-href => href(action=>"commitdiff",
6641                                                                hash=>$_)},
6642                                                 esc_html(substr($_, 0, 7)));
6643                                 } @{$co{'parents'}} ) .
6644                                 ')';
6645                 }
6646         }
6647
6648         my $hash_parent_param = $hash_parent;
6649         if (!defined $hash_parent_param) {
6650                 # --cc for multiple parents, --root for parentless
6651                 $hash_parent_param =
6652                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6653         }
6654
6655         # read commitdiff
6656         my $fd;
6657         my @difftree;
6658         if ($format eq 'html') {
6659                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6660                         "--no-commit-id", "--patch-with-raw", "--full-index",
6661                         $hash_parent_param, $hash, "--"
6662                         or die_error(500, "Open git-diff-tree failed");
6663
6664                 while (my $line = <$fd>) {
6665                         chomp $line;
6666                         # empty line ends raw part of diff-tree output
6667                         last unless $line;
6668                         push @difftree, scalar parse_difftree_raw_line($line);
6669                 }
6670
6671         } elsif ($format eq 'plain') {
6672                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6673                         '-p', $hash_parent_param, $hash, "--"
6674                         or die_error(500, "Open git-diff-tree failed");
6675         } elsif ($format eq 'patch') {
6676                 # For commit ranges, we limit the output to the number of
6677                 # patches specified in the 'patches' feature.
6678                 # For single commits, we limit the output to a single patch,
6679                 # diverging from the git-format-patch default.
6680                 my @commit_spec = ();
6681                 if ($hash_parent) {
6682                         if ($patch_max > 0) {
6683                                 push @commit_spec, "-$patch_max";
6684                         }
6685                         push @commit_spec, '-n', "$hash_parent..$hash";
6686                 } else {
6687                         if ($params{-single}) {
6688                                 push @commit_spec, '-1';
6689                         } else {
6690                                 if ($patch_max > 0) {
6691                                         push @commit_spec, "-$patch_max";
6692                                 }
6693                                 push @commit_spec, "-n";
6694                         }
6695                         push @commit_spec, '--root', $hash;
6696                 }
6697                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6698                         '--encoding=utf8', '--stdout', @commit_spec
6699                         or die_error(500, "Open git-format-patch failed");
6700         } else {
6701                 die_error(400, "Unknown commitdiff format");
6702         }
6703
6704         # non-textual hash id's can be cached
6705         my $expires;
6706         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6707                 $expires = "+1d";
6708         }
6709
6710         # write commit message
6711         if ($format eq 'html') {
6712                 my $refs = git_get_references();
6713                 my $ref = format_ref_marker($refs, $co{'id'});
6714
6715                 git_header_html(undef, $expires);
6716                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6717                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6718                 print "<div class=\"title_text\">\n" .
6719                       "<table class=\"object_header\">\n";
6720                 git_print_authorship_rows(\%co);
6721                 print "</table>".
6722                       "</div>\n";
6723                 print "<div class=\"page_body\">\n";
6724                 if (@{$co{'comment'}} > 1) {
6725                         print "<div class=\"log\">\n";
6726                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6727                         print "</div>\n"; # class="log"
6728                 }
6729
6730         } elsif ($format eq 'plain') {
6731                 my $refs = git_get_references("tags");
6732                 my $tagname = git_get_rev_name_tags($hash);
6733                 my $filename = basename($project) . "-$hash.patch";
6734
6735                 print $cgi->header(
6736                         -type => 'text/plain',
6737                         -charset => 'utf-8',
6738                         -expires => $expires,
6739                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6740                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6741                 print "From: " . to_utf8($co{'author'}) . "\n";
6742                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6743                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6744
6745                 print "X-Git-Tag: $tagname\n" if $tagname;
6746                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6747
6748                 foreach my $line (@{$co{'comment'}}) {
6749                         print to_utf8($line) . "\n";
6750                 }
6751                 print "---\n\n";
6752         } elsif ($format eq 'patch') {
6753                 my $filename = basename($project) . "-$hash.patch";
6754
6755                 print $cgi->header(
6756                         -type => 'text/plain',
6757                         -charset => 'utf-8',
6758                         -expires => $expires,
6759                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6760         }
6761
6762         # write patch
6763         if ($format eq 'html') {
6764                 my $use_parents = !defined $hash_parent ||
6765                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6766                 git_difftree_body(\@difftree, $hash,
6767                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6768                 print "<br/>\n";
6769
6770                 git_patchset_body($fd, \@difftree, $hash,
6771                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6772                 close $fd;
6773                 print "</div>\n"; # class="page_body"
6774                 git_footer_html();
6775
6776         } elsif ($format eq 'plain') {
6777                 local $/ = undef;
6778                 print <$fd>;
6779                 close $fd
6780                         or print "Reading git-diff-tree failed\n";
6781         } elsif ($format eq 'patch') {
6782                 local $/ = undef;
6783                 print <$fd>;
6784                 close $fd
6785                         or print "Reading git-format-patch failed\n";
6786         }
6787 }
6788
6789 sub git_commitdiff_plain {
6790         git_commitdiff(-format => 'plain');
6791 }
6792
6793 # format-patch-style patches
6794 sub git_patch {
6795         git_commitdiff(-format => 'patch', -single => 1);
6796 }
6797
6798 sub git_patches {
6799         git_commitdiff(-format => 'patch');
6800 }
6801
6802 sub git_history {
6803         git_log_generic('history', \&git_history_body,
6804                         $hash_base, $hash_parent_base,
6805                         $file_name, $hash);
6806 }
6807
6808 sub git_search {
6809         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6810         if (!defined $searchtext) {
6811                 die_error(400, "Text field is empty");
6812         }
6813         if (!defined $hash) {
6814                 $hash = git_get_head_hash($project);
6815         }
6816         my %co = parse_commit($hash);
6817         if (!%co) {
6818                 die_error(404, "Unknown commit object");
6819         }
6820         if (!defined $page) {
6821                 $page = 0;
6822         }
6823
6824         $searchtype ||= 'commit';
6825         if ($searchtype eq 'pickaxe') {
6826                 # pickaxe may take all resources of your box and run for several minutes
6827                 # with every query - so decide by yourself how public you make this feature
6828                 gitweb_check_feature('pickaxe')
6829                     or die_error(403, "Pickaxe is disabled");
6830         }
6831         if ($searchtype eq 'grep') {
6832                 gitweb_check_feature('grep')
6833                     or die_error(403, "Grep is disabled");
6834         }
6835
6836         git_header_html();
6837
6838         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6839                 my $greptype;
6840                 if ($searchtype eq 'commit') {
6841                         $greptype = "--grep=";
6842                 } elsif ($searchtype eq 'author') {
6843                         $greptype = "--author=";
6844                 } elsif ($searchtype eq 'committer') {
6845                         $greptype = "--committer=";
6846                 }
6847                 $greptype .= $searchtext;
6848                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6849                                                $greptype, '--regexp-ignore-case',
6850                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6851
6852                 my $paging_nav = '';
6853                 if ($page > 0) {
6854                         $paging_nav .=
6855                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6856                                                        searchtext=>$searchtext,
6857                                                        searchtype=>$searchtype)},
6858                                         "first");
6859                         $paging_nav .= " &sdot; " .
6860                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6861                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6862                 } else {
6863                         $paging_nav .= "first";
6864                         $paging_nav .= " &sdot; prev";
6865                 }
6866                 my $next_link = '';
6867                 if ($#commitlist >= 100) {
6868                         $next_link =
6869                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6870                                          -accesskey => "n", -title => "Alt-n"}, "next");
6871                         $paging_nav .= " &sdot; $next_link";
6872                 } else {
6873                         $paging_nav .= " &sdot; next";
6874                 }
6875
6876                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6877                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6878                 if ($page == 0 && !@commitlist) {
6879                         print "<p>No match.</p>\n";
6880                 } else {
6881                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6882                 }
6883         }
6884
6885         if ($searchtype eq 'pickaxe') {
6886                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6887                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6888
6889                 print "<table class=\"pickaxe search\">\n";
6890                 my $alternate = 1;
6891                 local $/ = "\n";
6892                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6893                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6894                         ($search_use_regexp ? '--pickaxe-regex' : ());
6895                 undef %co;
6896                 my @files;
6897                 while (my $line = <$fd>) {
6898                         chomp $line;
6899                         next unless $line;
6900
6901                         my %set = parse_difftree_raw_line($line);
6902                         if (defined $set{'commit'}) {
6903                                 # finish previous commit
6904                                 if (%co) {
6905                                         print "</td>\n" .
6906                                               "<td class=\"link\">" .
6907                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6908                                               " | " .
6909                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6910                                         print "</td>\n" .
6911                                               "</tr>\n";
6912                                 }
6913
6914                                 if ($alternate) {
6915                                         print "<tr class=\"dark\">\n";
6916                                 } else {
6917                                         print "<tr class=\"light\">\n";
6918                                 }
6919                                 $alternate ^= 1;
6920                                 %co = parse_commit($set{'commit'});
6921                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6922                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6923                                       "<td><i>$author</i></td>\n" .
6924                                       "<td>" .
6925                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6926                                               -class => "list subject"},
6927                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6928                         } elsif (defined $set{'to_id'}) {
6929                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6930
6931                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6932                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6933                                               -class => "list"},
6934                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6935                                       "<br/>\n";
6936                         }
6937                 }
6938                 close $fd;
6939
6940                 # finish last commit (warning: repetition!)
6941                 if (%co) {
6942                         print "</td>\n" .
6943                               "<td class=\"link\">" .
6944                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6945                               " | " .
6946                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6947                         print "</td>\n" .
6948                               "</tr>\n";
6949                 }
6950
6951                 print "</table>\n";
6952         }
6953
6954         if ($searchtype eq 'grep') {
6955                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6956                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6957
6958                 print "<table class=\"grep_search\">\n";
6959                 my $alternate = 1;
6960                 my $matches = 0;
6961                 local $/ = "\n";
6962                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6963                         $search_use_regexp ? ('-E', '-i') : '-F',
6964                         $searchtext, $co{'tree'};
6965                 my $lastfile = '';
6966                 while (my $line = <$fd>) {
6967                         chomp $line;
6968                         my ($file, $lno, $ltext, $binary);
6969                         last if ($matches++ > 1000);
6970                         if ($line =~ /^Binary file (.+) matches$/) {
6971                                 $file = $1;
6972                                 $binary = 1;
6973                         } else {
6974                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6975                         }
6976                         if ($file ne $lastfile) {
6977                                 $lastfile and print "</td></tr>\n";
6978                                 if ($alternate++) {
6979                                         print "<tr class=\"dark\">\n";
6980                                 } else {
6981                                         print "<tr class=\"light\">\n";
6982                                 }
6983                                 print "<td class=\"list\">".
6984                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6985                                                                file_name=>"$file"),
6986                                                 -class => "list"}, esc_path($file));
6987                                 print "</td><td>\n";
6988                                 $lastfile = $file;
6989                         }
6990                         if ($binary) {
6991                                 print "<div class=\"binary\">Binary file</div>\n";
6992                         } else {
6993                                 $ltext = untabify($ltext);
6994                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6995                                         $ltext = esc_html($1, -nbsp=>1);
6996                                         $ltext .= '<span class="match">';
6997                                         $ltext .= esc_html($2, -nbsp=>1);
6998                                         $ltext .= '</span>';
6999                                         $ltext .= esc_html($3, -nbsp=>1);
7000                                 } else {
7001                                         $ltext = esc_html($ltext, -nbsp=>1);
7002                                 }
7003                                 print "<div class=\"pre\">" .
7004                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7005                                                                file_name=>"$file").'#l'.$lno,
7006                                                 -class => "linenr"}, sprintf('%4i', $lno))
7007                                         . ' ' .  $ltext . "</div>\n";
7008                         }
7009                 }
7010                 if ($lastfile) {
7011                         print "</td></tr>\n";
7012                         if ($matches > 1000) {
7013                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7014                         }
7015                 } else {
7016                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7017                 }
7018                 close $fd;
7019
7020                 print "</table>\n";
7021         }
7022         git_footer_html();
7023 }
7024
7025 sub git_search_help {
7026         git_header_html();
7027         git_print_page_nav('','', $hash,$hash,$hash);
7028         print <<EOT;
7029 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7030 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7031 the pattern entered is recognized as the POSIX extended
7032 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7033 insensitive).</p>
7034 <dl>
7035 <dt><b>commit</b></dt>
7036 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7037 EOT
7038         my $have_grep = gitweb_check_feature('grep');
7039         if ($have_grep) {
7040                 print <<EOT;
7041 <dt><b>grep</b></dt>
7042 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7043     a different one) are searched for the given pattern. On large trees, this search can take
7044 a while and put some strain on the server, so please use it with some consideration. Note that
7045 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7046 case-sensitive.</dd>
7047 EOT
7048         }
7049         print <<EOT;
7050 <dt><b>author</b></dt>
7051 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7052 <dt><b>committer</b></dt>
7053 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7054 EOT
7055         my $have_pickaxe = gitweb_check_feature('pickaxe');
7056         if ($have_pickaxe) {
7057                 print <<EOT;
7058 <dt><b>pickaxe</b></dt>
7059 <dd>All commits that caused the string to appear or disappear from any file (changes that
7060 added, removed or "modified" the string) will be listed. This search can take a while and
7061 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7062 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7063 EOT
7064         }
7065         print "</dl>\n";
7066         git_footer_html();
7067 }
7068
7069 sub git_shortlog {
7070         git_log_generic('shortlog', \&git_shortlog_body,
7071                         $hash, $hash_parent);
7072 }
7073
7074 ## ......................................................................
7075 ## feeds (RSS, Atom; OPML)
7076
7077 sub git_feed {
7078         my $format = shift || 'atom';
7079         my $have_blame = gitweb_check_feature('blame');
7080
7081         # Atom: http://www.atomenabled.org/developers/syndication/
7082         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7083         if ($format ne 'rss' && $format ne 'atom') {
7084                 die_error(400, "Unknown web feed format");
7085         }
7086
7087         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7088         my $head = $hash || 'HEAD';
7089         my @commitlist = parse_commits($head, 150, 0, $file_name);
7090
7091         my %latest_commit;
7092         my %latest_date;
7093         my $content_type = "application/$format+xml";
7094         if (defined $cgi->http('HTTP_ACCEPT') &&
7095                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7096                 # browser (feed reader) prefers text/xml
7097                 $content_type = 'text/xml';
7098         }
7099         if (defined($commitlist[0])) {
7100                 %latest_commit = %{$commitlist[0]};
7101                 my $latest_epoch = $latest_commit{'committer_epoch'};
7102                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7103                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7104                 if (defined $if_modified) {
7105                         my $since;
7106                         if (eval { require HTTP::Date; 1; }) {
7107                                 $since = HTTP::Date::str2time($if_modified);
7108                         } elsif (eval { require Time::ParseDate; 1; }) {
7109                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7110                         }
7111                         if (defined $since && $latest_epoch <= $since) {
7112                                 print $cgi->header(
7113                                         -type => $content_type,
7114                                         -charset => 'utf-8',
7115                                         -last_modified => $latest_date{'rfc2822'},
7116                                         -status => '304 Not Modified');
7117                                 return;
7118                         }
7119                 }
7120                 print $cgi->header(
7121                         -type => $content_type,
7122                         -charset => 'utf-8',
7123                         -last_modified => $latest_date{'rfc2822'});
7124         } else {
7125                 print $cgi->header(
7126                         -type => $content_type,
7127                         -charset => 'utf-8');
7128         }
7129
7130         # Optimization: skip generating the body if client asks only
7131         # for Last-Modified date.
7132         return if ($cgi->request_method() eq 'HEAD');
7133
7134         # header variables
7135         my $title = "$site_name - $project/$action";
7136         my $feed_type = 'log';
7137         if (defined $hash) {
7138                 $title .= " - '$hash'";
7139                 $feed_type = 'branch log';
7140                 if (defined $file_name) {
7141                         $title .= " :: $file_name";
7142                         $feed_type = 'history';
7143                 }
7144         } elsif (defined $file_name) {
7145                 $title .= " - $file_name";
7146                 $feed_type = 'history';
7147         }
7148         $title .= " $feed_type";
7149         my $descr = git_get_project_description($project);
7150         if (defined $descr) {
7151                 $descr = esc_html($descr);
7152         } else {
7153                 $descr = "$project " .
7154                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7155                          " feed";
7156         }
7157         my $owner = git_get_project_owner($project);
7158         $owner = esc_html($owner);
7159
7160         #header
7161         my $alt_url;
7162         if (defined $file_name) {
7163                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7164         } elsif (defined $hash) {
7165                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7166         } else {
7167                 $alt_url = href(-full=>1, action=>"summary");
7168         }
7169         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7170         if ($format eq 'rss') {
7171                 print <<XML;
7172 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7173 <channel>
7174 XML
7175                 print "<title>$title</title>\n" .
7176                       "<link>$alt_url</link>\n" .
7177                       "<description>$descr</description>\n" .
7178                       "<language>en</language>\n" .
7179                       # project owner is responsible for 'editorial' content
7180                       "<managingEditor>$owner</managingEditor>\n";
7181                 if (defined $logo || defined $favicon) {
7182                         # prefer the logo to the favicon, since RSS
7183                         # doesn't allow both
7184                         my $img = esc_url($logo || $favicon);
7185                         print "<image>\n" .
7186                               "<url>$img</url>\n" .
7187                               "<title>$title</title>\n" .
7188                               "<link>$alt_url</link>\n" .
7189                               "</image>\n";
7190                 }
7191                 if (%latest_date) {
7192                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7193                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7194                 }
7195                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7196         } elsif ($format eq 'atom') {
7197                 print <<XML;
7198 <feed xmlns="http://www.w3.org/2005/Atom">
7199 XML
7200                 print "<title>$title</title>\n" .
7201                       "<subtitle>$descr</subtitle>\n" .
7202                       '<link rel="alternate" type="text/html" href="' .
7203                       $alt_url . '" />' . "\n" .
7204                       '<link rel="self" type="' . $content_type . '" href="' .
7205                       $cgi->self_url() . '" />' . "\n" .
7206                       "<id>" . href(-full=>1) . "</id>\n" .
7207                       # use project owner for feed author
7208                       "<author><name>$owner</name></author>\n";
7209                 if (defined $favicon) {
7210                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7211                 }
7212                 if (defined $logo) {
7213                         # not twice as wide as tall: 72 x 27 pixels
7214                         print "<logo>" . esc_url($logo) . "</logo>\n";
7215                 }
7216                 if (! %latest_date) {
7217                         # dummy date to keep the feed valid until commits trickle in:
7218                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7219                 } else {
7220                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7221                 }
7222                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7223         }
7224
7225         # contents
7226         for (my $i = 0; $i <= $#commitlist; $i++) {
7227                 my %co = %{$commitlist[$i]};
7228                 my $commit = $co{'id'};
7229                 # we read 150, we always show 30 and the ones more recent than 48 hours
7230                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7231                         last;
7232                 }
7233                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7234
7235                 # get list of changed files
7236                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7237                         $co{'parent'} || "--root",
7238                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7239                         or next;
7240                 my @difftree = map { chomp; $_ } <$fd>;
7241                 close $fd
7242                         or next;
7243
7244                 # print element (entry, item)
7245                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7246                 if ($format eq 'rss') {
7247                         print "<item>\n" .
7248                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7249                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7250                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7251                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7252                               "<link>$co_url</link>\n" .
7253                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7254                               "<content:encoded>" .
7255                               "<![CDATA[\n";
7256                 } elsif ($format eq 'atom') {
7257                         print "<entry>\n" .
7258                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7259                               "<updated>$cd{'iso-8601'}</updated>\n" .
7260                               "<author>\n" .
7261                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7262                         if ($co{'author_email'}) {
7263                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7264                         }
7265                         print "</author>\n" .
7266                               # use committer for contributor
7267                               "<contributor>\n" .
7268                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7269                         if ($co{'committer_email'}) {
7270                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7271                         }
7272                         print "</contributor>\n" .
7273                               "<published>$cd{'iso-8601'}</published>\n" .
7274                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7275                               "<id>$co_url</id>\n" .
7276                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7277                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7278                 }
7279                 my $comment = $co{'comment'};
7280                 print "<pre>\n";
7281                 foreach my $line (@$comment) {
7282                         $line = esc_html($line);
7283                         print "$line\n";
7284                 }
7285                 print "</pre><ul>\n";
7286                 foreach my $difftree_line (@difftree) {
7287                         my %difftree = parse_difftree_raw_line($difftree_line);
7288                         next if !$difftree{'from_id'};
7289
7290                         my $file = $difftree{'file'} || $difftree{'to_file'};
7291
7292                         print "<li>" .
7293                               "[" .
7294                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7295                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7296                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7297                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7298                                       -title => "diff"}, 'D');
7299                         if ($have_blame) {
7300                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7301                                                              file_name=>$file, hash_base=>$commit),
7302                                               -title => "blame"}, 'B');
7303                         }
7304                         # if this is not a feed of a file history
7305                         if (!defined $file_name || $file_name ne $file) {
7306                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7307                                                              file_name=>$file, hash=>$commit),
7308                                               -title => "history"}, 'H');
7309                         }
7310                         $file = esc_path($file);
7311                         print "] ".
7312                               "$file</li>\n";
7313                 }
7314                 if ($format eq 'rss') {
7315                         print "</ul>]]>\n" .
7316                               "</content:encoded>\n" .
7317                               "</item>\n";
7318                 } elsif ($format eq 'atom') {
7319                         print "</ul>\n</div>\n" .
7320                               "</content>\n" .
7321                               "</entry>\n";
7322                 }
7323         }
7324
7325         # end of feed
7326         if ($format eq 'rss') {
7327                 print "</channel>\n</rss>\n";
7328         } elsif ($format eq 'atom') {
7329                 print "</feed>\n";
7330         }
7331 }
7332
7333 sub git_rss {
7334         git_feed('rss');
7335 }
7336
7337 sub git_atom {
7338         git_feed('atom');
7339 }
7340
7341 sub git_opml {
7342         my @list = git_get_projects_list();
7343
7344         print $cgi->header(
7345                 -type => 'text/xml',
7346                 -charset => 'utf-8',
7347                 -content_disposition => 'inline; filename="opml.xml"');
7348
7349         print <<XML;
7350 <?xml version="1.0" encoding="utf-8"?>
7351 <opml version="1.0">
7352 <head>
7353   <title>$site_name OPML Export</title>
7354 </head>
7355 <body>
7356 <outline text="git RSS feeds">
7357 XML
7358
7359         foreach my $pr (@list) {
7360                 my %proj = %$pr;
7361                 my $head = git_get_head_hash($proj{'path'});
7362                 if (!defined $head) {
7363                         next;
7364                 }
7365                 $git_dir = "$projectroot/$proj{'path'}";
7366                 my %co = parse_commit($head);
7367                 if (!%co) {
7368                         next;
7369                 }
7370
7371                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7372                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7373                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7374                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7375         }
7376         print <<XML;
7377 </outline>
7378 </body>
7379 </opml>
7380 XML
7381 }