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