gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99 # URI of GIT logo (72x27 size)
 100 our $logo = "++GITWEB_LOGO++";
 101 # URI of GIT favicon, assumed to be image/png type
 102 our $favicon = "++GITWEB_FAVICON++";
 103 # URI of gitweb.js (JavaScript code for gitweb)
 104 our $javascript = "++GITWEB_JS++";
 105
 106 # URI and label (title) of GIT logo link
 107 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 108 #our $logo_label = "git documentation";
 109 our $logo_url = "http://git-scm.com/";
 110 our $logo_label = "git homepage";
 111
 112 # source of projects list
 113 our $projects_list = "++GITWEB_LIST++";
 114
 115 # the width (in characters) of the projects list "Description" column
 116 our $projects_list_description_width = 25;
 117
 118 # default order of projects list
 119 # valid values are none, project, descr, owner, and age
 120 our $default_projects_order = "project";
 121
 122 # show repository only if this file exists
 123 # (only effective if this variable evaluates to true)
 124 our $export_ok = "++GITWEB_EXPORT_OK++";
 125
 126 # show repository only if this subroutine returns true
 127 # when given the path to the project, for example:
 128 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 129 our $export_auth_hook = undef;
 130
 131 # only allow viewing of repositories also shown on the overview page
 132 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 133
 134 # list of git base URLs used for URL to where fetch project from,
 135 # i.e. full URL is "$git_base_url/$project"
 136 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 137
 138 # default blob_plain mimetype and default charset for text/plain blob
 139 our $default_blob_plain_mimetype = 'text/plain';
 140 our $default_text_plain_charset  = undef;
 141
 142 # file to use for guessing MIME types before trying /etc/mime.types
 143 # (relative to the current git repository)
 144 our $mimetypes_file = undef;
 145
 146 # assume this charset if line contains non-UTF-8 characters;
 147 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 148 # for which encoding all byte sequences are valid, for example
 149 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 150 # could be even 'utf-8' for the old behavior)
 151 our $fallback_encoding = 'latin1';
 152
 153 # rename detection options for git-diff and git-diff-tree
 154 # - default is '-M', with the cost proportional to
 155 #   (number of removed files) * (number of new files).
 156 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 157 #   (number of changed files + number of removed files) * (number of new files)
 158 # - even more costly is '-C', '--find-copies-harder' with cost
 159 #   (number of files in the original tree) * (number of new files)
 160 # - one might want to include '-B' option, e.g. '-B', '-M'
 161 our @diff_opts = ('-M'); # taken from git_commit
 162
 163 # Disables features that would allow repository owners to inject script into
 164 # the gitweb domain.
 165 our $prevent_xss = 0;
 166
 167 # Path to the highlight executable to use (must be the one from
 168 # http://www.andre-simon.de due to assumptions about parameters and output).
 169 # Useful if highlight is not installed on your webserver's PATH.
 170 # [Default: highlight]
 171 our $highlight_bin = "++HIGHLIGHT_BIN++";
 172
 173 # information about snapshot formats that gitweb is capable of serving
 174 our %known_snapshot_formats = (
 175         # name => {
 176         #       'display' => display name,
 177         #       'type' => mime type,
 178         #       'suffix' => filename suffix,
 179         #       'format' => --format for git-archive,
 180         #       'compressor' => [compressor command and arguments]
 181         #                       (array reference, optional)
 182         #       'disabled' => boolean (optional)}
 183         #
 184         'tgz' => {
 185                 'display' => 'tar.gz',
 186                 'type' => 'application/x-gzip',
 187                 'suffix' => '.tar.gz',
 188                 'format' => 'tar',
 189                 'compressor' => ['gzip']},
 190
 191         'tbz2' => {
 192                 'display' => 'tar.bz2',
 193                 'type' => 'application/x-bzip2',
 194                 'suffix' => '.tar.bz2',
 195                 'format' => 'tar',
 196                 'compressor' => ['bzip2']},
 197
 198         'txz' => {
 199                 'display' => 'tar.xz',
 200                 'type' => 'application/x-xz',
 201                 'suffix' => '.tar.xz',
 202                 'format' => 'tar',
 203                 'compressor' => ['xz'],
 204                 'disabled' => 1},
 205
 206         'zip' => {
 207                 'display' => 'zip',
 208                 'type' => 'application/x-zip',
 209                 'suffix' => '.zip',
 210                 'format' => 'zip'},
 211 );
 212
 213 # Aliases so we understand old gitweb.snapshot values in repository
 214 # configuration.
 215 our %known_snapshot_format_aliases = (
 216         'gzip'  => 'tgz',
 217         'bzip2' => 'tbz2',
 218         'xz'    => 'txz',
 219
 220         # backward compatibility: legacy gitweb config support
 221         'x-gzip' => undef, 'gz' => undef,
 222         'x-bzip2' => undef, 'bz2' => undef,
 223         'x-zip' => undef, '' => undef,
 224 );
 225
 226 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 227 # are changed, it may be appropriate to change these values too via
 228 # $GITWEB_CONFIG.
 229 our %avatar_size = (
 230         'default' => 16,
 231         'double'  => 32
 232 );
 233
 234 # Used to set the maximum load that we will still respond to gitweb queries.
 235 # If server load exceed this value then return "503 server busy" error.
 236 # If gitweb cannot determined server load, it is taken to be 0.
 237 # Leave it undefined (or set to 'undef') to turn off load checking.
 238 our $maxload = 300;
 239
 240 # configuration for 'highlight' (http://www.andre-simon.de/)
 241 # match by basename
 242 our %highlight_basename = (
 243         #'Program' => 'py',
 244         #'Library' => 'py',
 245         'SConstruct' => 'py', # SCons equivalent of Makefile
 246         'Makefile' => 'make',
 247 );
 248 # match by extension
 249 our %highlight_ext = (
 250         # main extensions, defining name of syntax;
 251         # see files in /usr/share/highlight/langDefs/ directory
 252         map { $_ => $_ }
 253                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 254         # alternate extensions, see /etc/highlight/filetypes.conf
 255         'h' => 'c',
 256         map { $_ => 'sh'  } qw(bash zsh ksh),
 257         map { $_ => 'cpp' } qw(cxx c++ cc),
 258         map { $_ => 'php' } qw(php3 php4 php5 phps),
 259         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 260         map { $_ => 'make'} qw(mak mk),
 261         map { $_ => 'xml' } qw(xhtml html htm),
 262 );
 263
 264 # You define site-wide feature defaults here; override them with
 265 # $GITWEB_CONFIG as necessary.
 266 our %feature = (
 267         # feature => {
 268         #       'sub' => feature-sub (subroutine),
 269         #       'override' => allow-override (boolean),
 270         #       'default' => [ default options...] (array reference)}
 271         #
 272         # if feature is overridable (it means that allow-override has true value),
 273         # then feature-sub will be called with default options as parameters;
 274         # return value of feature-sub indicates if to enable specified feature
 275         #
 276         # if there is no 'sub' key (no feature-sub), then feature cannot be
 277         # overridden
 278         #
 279         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 280         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 281         # is enabled
 282
 283         # Enable the 'blame' blob view, showing the last commit that modified
 284         # each line in the file. This can be very CPU-intensive.
 285
 286         # To enable system wide have in $GITWEB_CONFIG
 287         # $feature{'blame'}{'default'} = [1];
 288         # To have project specific config enable override in $GITWEB_CONFIG
 289         # $feature{'blame'}{'override'} = 1;
 290         # and in project config gitweb.blame = 0|1;
 291         'blame' => {
 292                 'sub' => sub { feature_bool('blame', @_) },
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Enable the 'snapshot' link, providing a compressed archive of any
 297         # tree. This can potentially generate high traffic if you have large
 298         # project.
 299
 300         # Value is a list of formats defined in %known_snapshot_formats that
 301         # you wish to offer.
 302         # To disable system wide have in $GITWEB_CONFIG
 303         # $feature{'snapshot'}{'default'} = [];
 304         # To have project specific config enable override in $GITWEB_CONFIG
 305         # $feature{'snapshot'}{'override'} = 1;
 306         # and in project config, a comma-separated list of formats or "none"
 307         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 308         'snapshot' => {
 309                 'sub' => \&feature_snapshot,
 310                 'override' => 0,
 311                 'default' => ['tgz']},
 312
 313         # Enable text search, which will list the commits which match author,
 314         # committer or commit text to a given string.  Enabled by default.
 315         # Project specific override is not supported.
 316         'search' => {
 317                 'override' => 0,
 318                 'default' => [1]},
 319
 320         # Enable grep search, which will list the files in currently selected
 321         # tree containing the given string. Enabled by default. This can be
 322         # potentially CPU-intensive, of course.
 323
 324         # To enable system wide have in $GITWEB_CONFIG
 325         # $feature{'grep'}{'default'} = [1];
 326         # To have project specific config enable override in $GITWEB_CONFIG
 327         # $feature{'grep'}{'override'} = 1;
 328         # and in project config gitweb.grep = 0|1;
 329         'grep' => {
 330                 'sub' => sub { feature_bool('grep', @_) },
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable the pickaxe search, which will list the commits that modified
 335         # a given string in a file. This can be practical and quite faster
 336         # alternative to 'blame', but still potentially CPU-intensive.
 337
 338         # To enable system wide have in $GITWEB_CONFIG
 339         # $feature{'pickaxe'}{'default'} = [1];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'pickaxe'}{'override'} = 1;
 342         # and in project config gitweb.pickaxe = 0|1;
 343         'pickaxe' => {
 344                 'sub' => sub { feature_bool('pickaxe', @_) },
 345                 'override' => 0,
 346                 'default' => [1]},
 347
 348         # Enable showing size of blobs in a 'tree' view, in a separate
 349         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 350
 351         # To disable system wide have in $GITWEB_CONFIG
 352         # $feature{'show-sizes'}{'default'} = [0];
 353         # To have project specific config enable override in $GITWEB_CONFIG
 354         # $feature{'show-sizes'}{'override'} = 1;
 355         # and in project config gitweb.showsizes = 0|1;
 356         'show-sizes' => {
 357                 'sub' => sub { feature_bool('showsizes', @_) },
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Make gitweb use an alternative format of the URLs which can be
 362         # more readable and natural-looking: project name is embedded
 363         # directly in the path and the query string contains other
 364         # auxiliary information. All gitweb installations recognize
 365         # URL in either format; this configures in which formats gitweb
 366         # generates links.
 367
 368         # To enable system wide have in $GITWEB_CONFIG
 369         # $feature{'pathinfo'}{'default'} = [1];
 370         # Project specific override is not supported.
 371
 372         # Note that you will need to change the default location of CSS,
 373         # favicon, logo and possibly other files to an absolute URL. Also,
 374         # if gitweb.cgi serves as your indexfile, you will need to force
 375         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 376         'pathinfo' => {
 377                 'override' => 0,
 378                 'default' => [0]},
 379
 380         # Make gitweb consider projects in project root subdirectories
 381         # to be forks of existing projects. Given project $projname.git,
 382         # projects matching $projname/*.git will not be shown in the main
 383         # projects list, instead a '+' mark will be added to $projname
 384         # there and a 'forks' view will be enabled for the project, listing
 385         # all the forks. If project list is taken from a file, forks have
 386         # to be listed after the main project.
 387
 388         # To enable system wide have in $GITWEB_CONFIG
 389         # $feature{'forks'}{'default'} = [1];
 390         # Project specific override is not supported.
 391         'forks' => {
 392                 'override' => 0,
 393                 'default' => [0]},
 394
 395         # Insert custom links to the action bar of all project pages.
 396         # This enables you mainly to link to third-party scripts integrating
 397         # into gitweb; e.g. git-browser for graphical history representation
 398         # or custom web-based repository administration interface.
 399
 400         # The 'default' value consists of a list of triplets in the form
 401         # (label, link, position) where position is the label after which
 402         # to insert the link and link is a format string where %n expands
 403         # to the project name, %f to the project path within the filesystem,
 404         # %h to the current hash (h gitweb parameter) and %b to the current
 405         # hash base (hb gitweb parameter); %% expands to %.
 406
 407         # To enable system wide have in $GITWEB_CONFIG e.g.
 408         # $feature{'actions'}{'default'} = [('graphiclog',
 409         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 410         # Project specific override is not supported.
 411         'actions' => {
 412                 'override' => 0,
 413                 'default' => []},
 414
 415         # Allow gitweb scan project content tags described in ctags/
 416         # of project repository, and display the popular Web 2.0-ish
 417         # "tag cloud" near the project list. Note that this is something
 418         # COMPLETELY different from the normal Git tags.
 419
 420         # gitweb by itself can show existing tags, but it does not handle
 421         # tagging itself; you need an external application for that.
 422         # For an example script, check Girocco's cgi/tagproj.cgi.
 423         # You may want to install the HTML::TagCloud Perl module to get
 424         # a pretty tag cloud instead of just a list of tags.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 428         # Project specific override is not supported.
 429         'ctags' => {
 430                 'override' => 0,
 431                 'default' => [0]},
 432
 433         # The maximum number of patches in a patchset generated in patch
 434         # view. Set this to 0 or undef to disable patch view, or to a
 435         # negative number to remove any limit.
 436
 437         # To disable system wide have in $GITWEB_CONFIG
 438         # $feature{'patches'}{'default'} = [0];
 439         # To have project specific config enable override in $GITWEB_CONFIG
 440         # $feature{'patches'}{'override'} = 1;
 441         # and in project config gitweb.patches = 0|n;
 442         # where n is the maximum number of patches allowed in a patchset.
 443         'patches' => {
 444                 'sub' => \&feature_patches,
 445                 'override' => 0,
 446                 'default' => [16]},
 447
 448         # Avatar support. When this feature is enabled, views such as
 449         # shortlog or commit will display an avatar associated with
 450         # the email of the committer(s) and/or author(s).
 451
 452         # Currently available providers are gravatar and picon.
 453         # If an unknown provider is specified, the feature is disabled.
 454
 455         # Gravatar depends on Digest::MD5.
 456         # Picon currently relies on the indiana.edu database.
 457
 458         # To enable system wide have in $GITWEB_CONFIG
 459         # $feature{'avatar'}{'default'} = ['<provider>'];
 460         # where <provider> is either gravatar or picon.
 461         # To have project specific config enable override in $GITWEB_CONFIG
 462         # $feature{'avatar'}{'override'} = 1;
 463         # and in project config gitweb.avatar = <provider>;
 464         'avatar' => {
 465                 'sub' => \&feature_avatar,
 466                 'override' => 0,
 467                 'default' => ['']},
 468
 469         # Enable displaying how much time and how many git commands
 470         # it took to generate and display page.  Disabled by default.
 471         # Project specific override is not supported.
 472         'timed' => {
 473                 'override' => 0,
 474                 'default' => [0]},
 475
 476         # Enable turning some links into links to actions which require
 477         # JavaScript to run (like 'blame_incremental').  Not enabled by
 478         # default.  Project specific override is currently not supported.
 479         'javascript-actions' => {
 480                 'override' => 0,
 481                 'default' => [0]},
 482
 483         # Syntax highlighting support. This is based on Daniel Svensson's
 484         # and Sham Chukoury's work in gitweb-xmms2.git.
 485         # It requires the 'highlight' program present in $PATH,
 486         # and therefore is disabled by default.
 487
 488         # To enable system wide have in $GITWEB_CONFIG
 489         # $feature{'highlight'}{'default'} = [1];
 490
 491         'highlight' => {
 492                 'sub' => sub { feature_bool('highlight', @_) },
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable displaying of remote heads in the heads list
 497
 498         # To enable system wide have in $GITWEB_CONFIG
 499         # $feature{'remote_heads'}{'default'} = [1];
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'remote_heads'}{'override'} = 1;
 502         # and in project config gitweb.remote_heads = 0|1;
 503         'remote_heads' => {
 504                 'sub' => sub { feature_bool('remote_heads', @_) },
 505                 'override' => 0,
 506                 'default' => [0]},
 507 );
 508
 509 sub gitweb_get_feature {
 510         my ($name) = @_;
 511         return unless exists $feature{$name};
 512         my ($sub, $override, @defaults) = (
 513                 $feature{$name}{'sub'},
 514                 $feature{$name}{'override'},
 515                 @{$feature{$name}{'default'}});
 516         # project specific override is possible only if we have project
 517         our $git_dir; # global variable, declared later
 518         if (!$override || !defined $git_dir) {
 519                 return @defaults;
 520         }
 521         if (!defined $sub) {
 522                 warn "feature $name is not overridable";
 523                 return @defaults;
 524         }
 525         return $sub->(@defaults);
 526 }
 527
 528 # A wrapper to check if a given feature is enabled.
 529 # With this, you can say
 530 #
 531 #   my $bool_feat = gitweb_check_feature('bool_feat');
 532 #   gitweb_check_feature('bool_feat') or somecode;
 533 #
 534 # instead of
 535 #
 536 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 537 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 538 #
 539 sub gitweb_check_feature {
 540         return (gitweb_get_feature(@_))[0];
 541 }
 542
 543
 544 sub feature_bool {
 545         my $key = shift;
 546         my ($val) = git_get_project_config($key, '--bool');
 547
 548         if (!defined $val) {
 549                 return ($_[0]);
 550         } elsif ($val eq 'true') {
 551                 return (1);
 552         } elsif ($val eq 'false') {
 553                 return (0);
 554         }
 555 }
 556
 557 sub feature_snapshot {
 558         my (@fmts) = @_;
 559
 560         my ($val) = git_get_project_config('snapshot');
 561
 562         if ($val) {
 563                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 564         }
 565
 566         return @fmts;
 567 }
 568
 569 sub feature_patches {
 570         my @val = (git_get_project_config('patches', '--int'));
 571
 572         if (@val) {
 573                 return @val;
 574         }
 575
 576         return ($_[0]);
 577 }
 578
 579 sub feature_avatar {
 580         my @val = (git_get_project_config('avatar'));
 581
 582         return @val ? @val : @_;
 583 }
 584
 585 # checking HEAD file with -e is fragile if the repository was
 586 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 587 # and then pruned.
 588 sub check_head_link {
 589         my ($dir) = @_;
 590         my $headfile = "$dir/HEAD";
 591         return ((-e $headfile) ||
 592                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 593 }
 594
 595 sub check_export_ok {
 596         my ($dir) = @_;
 597         return (check_head_link($dir) &&
 598                 (!$export_ok || -e "$dir/$export_ok") &&
 599                 (!$export_auth_hook || $export_auth_hook->($dir)));
 600 }
 601
 602 # process alternate names for backward compatibility
 603 # filter out unsupported (unknown) snapshot formats
 604 sub filter_snapshot_fmts {
 605         my @fmts = @_;
 606
 607         @fmts = map {
 608                 exists $known_snapshot_format_aliases{$_} ?
 609                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 610         @fmts = grep {
 611                 exists $known_snapshot_formats{$_} &&
 612                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 613 }
 614
 615 # If it is set to code reference, it is code that it is to be run once per
 616 # request, allowing updating configurations that change with each request,
 617 # while running other code in config file only once.
 618 #
 619 # Otherwise, if it is false then gitweb would process config file only once;
 620 # if it is true then gitweb config would be run for each request.
 621 our $per_request_config = 1;
 622
 623 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 624 sub evaluate_gitweb_config {
 625         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 626         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 627         # die if there are errors parsing config file
 628         if (-e $GITWEB_CONFIG) {
 629                 do $GITWEB_CONFIG;
 630                 die $@ if $@;
 631         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 632                 do $GITWEB_CONFIG_SYSTEM;
 633                 die $@ if $@;
 634         }
 635 }
 636
 637 # Get loadavg of system, to compare against $maxload.
 638 # Currently it requires '/proc/loadavg' present to get loadavg;
 639 # if it is not present it returns 0, which means no load checking.
 640 sub get_loadavg {
 641         if( -e '/proc/loadavg' ){
 642                 open my $fd, '<', '/proc/loadavg'
 643                         or return 0;
 644                 my @load = split(/\s+/, scalar <$fd>);
 645                 close $fd;
 646
 647                 # The first three columns measure CPU and IO utilization of the last one,
 648                 # five, and 10 minute periods.  The fourth column shows the number of
 649                 # currently running processes and the total number of processes in the m/n
 650                 # format.  The last column displays the last process ID used.
 651                 return $load[0] || 0;
 652         }
 653         # additional checks for load average should go here for things that don't export
 654         # /proc/loadavg
 655
 656         return 0;
 657 }
 658
 659 # version of the core git binary
 660 our $git_version;
 661 sub evaluate_git_version {
 662         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 663         $number_of_git_cmds++;
 664 }
 665
 666 sub check_loadavg {
 667         if (defined $maxload && get_loadavg() > $maxload) {
 668                 die_error(503, "The load average on the server is too high");
 669         }
 670 }
 671
 672 # ======================================================================
 673 # input validation and dispatch
 674
 675 # input parameters can be collected from a variety of sources (presently, CGI
 676 # and PATH_INFO), so we define an %input_params hash that collects them all
 677 # together during validation: this allows subsequent uses (e.g. href()) to be
 678 # agnostic of the parameter origin
 679
 680 our %input_params = ();
 681
 682 # input parameters are stored with the long parameter name as key. This will
 683 # also be used in the href subroutine to convert parameters to their CGI
 684 # equivalent, and since the href() usage is the most frequent one, we store
 685 # the name -> CGI key mapping here, instead of the reverse.
 686 #
 687 # XXX: Warning: If you touch this, check the search form for updating,
 688 # too.
 689
 690 our @cgi_param_mapping = (
 691         project => "p",
 692         action => "a",
 693         file_name => "f",
 694         file_parent => "fp",
 695         hash => "h",
 696         hash_parent => "hp",
 697         hash_base => "hb",
 698         hash_parent_base => "hpb",
 699         page => "pg",
 700         order => "o",
 701         searchtext => "s",
 702         searchtype => "st",
 703         snapshot_format => "sf",
 704         extra_options => "opt",
 705         search_use_regexp => "sr",
 706         # this must be last entry (for manipulation from JavaScript)
 707         javascript => "js"
 708 );
 709 our %cgi_param_mapping = @cgi_param_mapping;
 710
 711 # we will also need to know the possible actions, for validation
 712 our %actions = (
 713         "blame" => \&git_blame,
 714         "blame_incremental" => \&git_blame_incremental,
 715         "blame_data" => \&git_blame_data,
 716         "blobdiff" => \&git_blobdiff,
 717         "blobdiff_plain" => \&git_blobdiff_plain,
 718         "blob" => \&git_blob,
 719         "blob_plain" => \&git_blob_plain,
 720         "commitdiff" => \&git_commitdiff,
 721         "commitdiff_plain" => \&git_commitdiff_plain,
 722         "commit" => \&git_commit,
 723         "forks" => \&git_forks,
 724         "heads" => \&git_heads,
 725         "history" => \&git_history,
 726         "log" => \&git_log,
 727         "patch" => \&git_patch,
 728         "patches" => \&git_patches,
 729         "remotes" => \&git_remotes,
 730         "rss" => \&git_rss,
 731         "atom" => \&git_atom,
 732         "search" => \&git_search,
 733         "search_help" => \&git_search_help,
 734         "shortlog" => \&git_shortlog,
 735         "summary" => \&git_summary,
 736         "tag" => \&git_tag,
 737         "tags" => \&git_tags,
 738         "tree" => \&git_tree,
 739         "snapshot" => \&git_snapshot,
 740         "object" => \&git_object,
 741         # those below don't need $project
 742         "opml" => \&git_opml,
 743         "project_list" => \&git_project_list,
 744         "project_index" => \&git_project_index,
 745 );
 746
 747 # finally, we have the hash of allowed extra_options for the commands that
 748 # allow them
 749 our %allowed_options = (
 750         "--no-merges" => [ qw(rss atom log shortlog history) ],
 751 );
 752
 753 # fill %input_params with the CGI parameters. All values except for 'opt'
 754 # should be single values, but opt can be an array. We should probably
 755 # build an array of parameters that can be multi-valued, but since for the time
 756 # being it's only this one, we just single it out
 757 sub evaluate_query_params {
 758         our $cgi;
 759
 760         while (my ($name, $symbol) = each %cgi_param_mapping) {
 761                 if ($symbol eq 'opt') {
 762                         $input_params{$name} = [ $cgi->param($symbol) ];
 763                 } else {
 764                         $input_params{$name} = $cgi->param($symbol);
 765                 }
 766         }
 767 }
 768
 769 # now read PATH_INFO and update the parameter list for missing parameters
 770 sub evaluate_path_info {
 771         return if defined $input_params{'project'};
 772         return if !$path_info;
 773         $path_info =~ s,^/+,,;
 774         return if !$path_info;
 775
 776         # find which part of PATH_INFO is project
 777         my $project = $path_info;
 778         $project =~ s,/+$,,;
 779         while ($project && !check_head_link("$projectroot/$project")) {
 780                 $project =~ s,/*[^/]*$,,;
 781         }
 782         return unless $project;
 783         $input_params{'project'} = $project;
 784
 785         # do not change any parameters if an action is given using the query string
 786         return if $input_params{'action'};
 787         $path_info =~ s,^\Q$project\E/*,,;
 788
 789         # next, check if we have an action
 790         my $action = $path_info;
 791         $action =~ s,/.*$,,;
 792         if (exists $actions{$action}) {
 793                 $path_info =~ s,^$action/*,,;
 794                 $input_params{'action'} = $action;
 795         }
 796
 797         # list of actions that want hash_base instead of hash, but can have no
 798         # pathname (f) parameter
 799         my @wants_base = (
 800                 'tree',
 801                 'history',
 802         );
 803
 804         # we want to catch, among others
 805         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 806         my ($parentrefname, $parentpathname, $refname, $pathname) =
 807                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 808
 809         # first, analyze the 'current' part
 810         if (defined $pathname) {
 811                 # we got "branch:filename" or "branch:dir/"
 812                 # we could use git_get_type(branch:pathname), but:
 813                 # - it needs $git_dir
 814                 # - it does a git() call
 815                 # - the convention of terminating directories with a slash
 816                 #   makes it superfluous
 817                 # - embedding the action in the PATH_INFO would make it even
 818                 #   more superfluous
 819                 $pathname =~ s,^/+,,;
 820                 if (!$pathname || substr($pathname, -1) eq "/") {
 821                         $input_params{'action'} ||= "tree";
 822                         $pathname =~ s,/$,,;
 823                 } else {
 824                         # the default action depends on whether we had parent info
 825                         # or not
 826                         if ($parentrefname) {
 827                                 $input_params{'action'} ||= "blobdiff_plain";
 828                         } else {
 829                                 $input_params{'action'} ||= "blob_plain";
 830                         }
 831                 }
 832                 $input_params{'hash_base'} ||= $refname;
 833                 $input_params{'file_name'} ||= $pathname;
 834         } elsif (defined $refname) {
 835                 # we got "branch". In this case we have to choose if we have to
 836                 # set hash or hash_base.
 837                 #
 838                 # Most of the actions without a pathname only want hash to be
 839                 # set, except for the ones specified in @wants_base that want
 840                 # hash_base instead. It should also be noted that hand-crafted
 841                 # links having 'history' as an action and no pathname or hash
 842                 # set will fail, but that happens regardless of PATH_INFO.
 843                 if (defined $parentrefname) {
 844                         # if there is parent let the default be 'shortlog' action
 845                         # (for http://git.example.com/repo.git/A..B links); if there
 846                         # is no parent, dispatch will detect type of object and set
 847                         # action appropriately if required (if action is not set)
 848                         $input_params{'action'} ||= "shortlog";
 849                 }
 850                 if ($input_params{'action'} &&
 851                     grep { $_ eq $input_params{'action'} } @wants_base) {
 852                         $input_params{'hash_base'} ||= $refname;
 853                 } else {
 854                         $input_params{'hash'} ||= $refname;
 855                 }
 856         }
 857
 858         # next, handle the 'parent' part, if present
 859         if (defined $parentrefname) {
 860                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 861                 # someproject/blobdiff/oldrev..newrev:/filename
 862                 if ($parentpathname) {
 863                         $parentpathname =~ s,^/+,,;
 864                         $parentpathname =~ s,/$,,;
 865                         $input_params{'file_parent'} ||= $parentpathname;
 866                 } else {
 867                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 868                 }
 869                 # we assume that hash_parent_base is wanted if a path was specified,
 870                 # or if the action wants hash_base instead of hash
 871                 if (defined $input_params{'file_parent'} ||
 872                         grep { $_ eq $input_params{'action'} } @wants_base) {
 873                         $input_params{'hash_parent_base'} ||= $parentrefname;
 874                 } else {
 875                         $input_params{'hash_parent'} ||= $parentrefname;
 876                 }
 877         }
 878
 879         # for the snapshot action, we allow URLs in the form
 880         # $project/snapshot/$hash.ext
 881         # where .ext determines the snapshot and gets removed from the
 882         # passed $refname to provide the $hash.
 883         #
 884         # To be able to tell that $refname includes the format extension, we
 885         # require the following two conditions to be satisfied:
 886         # - the hash input parameter MUST have been set from the $refname part
 887         #   of the URL (i.e. they must be equal)
 888         # - the snapshot format MUST NOT have been defined already (e.g. from
 889         #   CGI parameter sf)
 890         # It's also useless to try any matching unless $refname has a dot,
 891         # so we check for that too
 892         if (defined $input_params{'action'} &&
 893                 $input_params{'action'} eq 'snapshot' &&
 894                 defined $refname && index($refname, '.') != -1 &&
 895                 $refname eq $input_params{'hash'} &&
 896                 !defined $input_params{'snapshot_format'}) {
 897                 # We loop over the known snapshot formats, checking for
 898                 # extensions. Allowed extensions are both the defined suffix
 899                 # (which includes the initial dot already) and the snapshot
 900                 # format key itself, with a prepended dot
 901                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 902                         my $hash = $refname;
 903                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 904                                 next;
 905                         }
 906                         my $sfx = $1;
 907                         # a valid suffix was found, so set the snapshot format
 908                         # and reset the hash parameter
 909                         $input_params{'snapshot_format'} = $fmt;
 910                         $input_params{'hash'} = $hash;
 911                         # we also set the format suffix to the one requested
 912                         # in the URL: this way a request for e.g. .tgz returns
 913                         # a .tgz instead of a .tar.gz
 914                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 915                         last;
 916                 }
 917         }
 918 }
 919
 920 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 921      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 922      $searchtext, $search_regexp);
 923 sub evaluate_and_validate_params {
 924         our $action = $input_params{'action'};
 925         if (defined $action) {
 926                 if (!validate_action($action)) {
 927                         die_error(400, "Invalid action parameter");
 928                 }
 929         }
 930
 931         # parameters which are pathnames
 932         our $project = $input_params{'project'};
 933         if (defined $project) {
 934                 if (!validate_project($project)) {
 935                         undef $project;
 936                         die_error(404, "No such project");
 937                 }
 938         }
 939
 940         our $file_name = $input_params{'file_name'};
 941         if (defined $file_name) {
 942                 if (!validate_pathname($file_name)) {
 943                         die_error(400, "Invalid file parameter");
 944                 }
 945         }
 946
 947         our $file_parent = $input_params{'file_parent'};
 948         if (defined $file_parent) {
 949                 if (!validate_pathname($file_parent)) {
 950                         die_error(400, "Invalid file parent parameter");
 951                 }
 952         }
 953
 954         # parameters which are refnames
 955         our $hash = $input_params{'hash'};
 956         if (defined $hash) {
 957                 if (!validate_refname($hash)) {
 958                         die_error(400, "Invalid hash parameter");
 959                 }
 960         }
 961
 962         our $hash_parent = $input_params{'hash_parent'};
 963         if (defined $hash_parent) {
 964                 if (!validate_refname($hash_parent)) {
 965                         die_error(400, "Invalid hash parent parameter");
 966                 }
 967         }
 968
 969         our $hash_base = $input_params{'hash_base'};
 970         if (defined $hash_base) {
 971                 if (!validate_refname($hash_base)) {
 972                         die_error(400, "Invalid hash base parameter");
 973                 }
 974         }
 975
 976         our @extra_options = @{$input_params{'extra_options'}};
 977         # @extra_options is always defined, since it can only be (currently) set from
 978         # CGI, and $cgi->param() returns the empty array in array context if the param
 979         # is not set
 980         foreach my $opt (@extra_options) {
 981                 if (not exists $allowed_options{$opt}) {
 982                         die_error(400, "Invalid option parameter");
 983                 }
 984                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 985                         die_error(400, "Invalid option parameter for this action");
 986                 }
 987         }
 988
 989         our $hash_parent_base = $input_params{'hash_parent_base'};
 990         if (defined $hash_parent_base) {
 991                 if (!validate_refname($hash_parent_base)) {
 992                         die_error(400, "Invalid hash parent base parameter");
 993                 }
 994         }
 995
 996         # other parameters
 997         our $page = $input_params{'page'};
 998         if (defined $page) {
 999                 if ($page =~ m/[^0-9]/) {
1000                         die_error(400, "Invalid page parameter");
1001                 }
1002         }
1003
1004         our $searchtype = $input_params{'searchtype'};
1005         if (defined $searchtype) {
1006                 if ($searchtype =~ m/[^a-z]/) {
1007                         die_error(400, "Invalid searchtype parameter");
1008                 }
1009         }
1010
1011         our $search_use_regexp = $input_params{'search_use_regexp'};
1012
1013         our $searchtext = $input_params{'searchtext'};
1014         our $search_regexp;
1015         if (defined $searchtext) {
1016                 if (length($searchtext) < 2) {
1017                         die_error(403, "At least two characters are required for search parameter");
1018                 }
1019                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1020         }
1021 }
1022
1023 # path to the current git repository
1024 our $git_dir;
1025 sub evaluate_git_dir {
1026         our $git_dir = "$projectroot/$project" if $project;
1027 }
1028
1029 our (@snapshot_fmts, $git_avatar);
1030 sub configure_gitweb_features {
1031         # list of supported snapshot formats
1032         our @snapshot_fmts = gitweb_get_feature('snapshot');
1033         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1034
1035         # check that the avatar feature is set to a known provider name,
1036         # and for each provider check if the dependencies are satisfied.
1037         # if the provider name is invalid or the dependencies are not met,
1038         # reset $git_avatar to the empty string.
1039         our ($git_avatar) = gitweb_get_feature('avatar');
1040         if ($git_avatar eq 'gravatar') {
1041                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1042         } elsif ($git_avatar eq 'picon') {
1043                 # no dependencies
1044         } else {
1045                 $git_avatar = '';
1046         }
1047 }
1048
1049 # custom error handler: 'die <message>' is Internal Server Error
1050 sub handle_errors_html {
1051         my $msg = shift; # it is already HTML escaped
1052
1053         # to avoid infinite loop where error occurs in die_error,
1054         # change handler to default handler, disabling handle_errors_html
1055         set_message("Error occured when inside die_error:\n$msg");
1056
1057         # you cannot jump out of die_error when called as error handler;
1058         # the subroutine set via CGI::Carp::set_message is called _after_
1059         # HTTP headers are already written, so it cannot write them itself
1060         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1061 }
1062 set_message(\&handle_errors_html);
1063
1064 # dispatch
1065 sub dispatch {
1066         if (!defined $action) {
1067                 if (defined $hash) {
1068                         $action = git_get_type($hash);
1069                 } elsif (defined $hash_base && defined $file_name) {
1070                         $action = git_get_type("$hash_base:$file_name");
1071                 } elsif (defined $project) {
1072                         $action = 'summary';
1073                 } else {
1074                         $action = 'project_list';
1075                 }
1076         }
1077         if (!defined($actions{$action})) {
1078                 die_error(400, "Unknown action");
1079         }
1080         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1081             !$project) {
1082                 die_error(400, "Project needed");
1083         }
1084         $actions{$action}->();
1085 }
1086
1087 sub reset_timer {
1088         our $t0 = [ gettimeofday() ]
1089                 if defined $t0;
1090         our $number_of_git_cmds = 0;
1091 }
1092
1093 our $first_request = 1;
1094 sub run_request {
1095         reset_timer();
1096
1097         evaluate_uri();
1098         if ($first_request) {
1099                 evaluate_gitweb_config();
1100                 evaluate_git_version();
1101         }
1102         if ($per_request_config) {
1103                 if (ref($per_request_config) eq 'CODE') {
1104                         $per_request_config->();
1105                 } elsif (!$first_request) {
1106                         evaluate_gitweb_config();
1107                 }
1108         }
1109         check_loadavg();
1110
1111         # $projectroot and $projects_list might be set in gitweb config file
1112         $projects_list ||= $projectroot;
1113
1114         evaluate_query_params();
1115         evaluate_path_info();
1116         evaluate_and_validate_params();
1117         evaluate_git_dir();
1118
1119         configure_gitweb_features();
1120
1121         dispatch();
1122 }
1123
1124 our $is_last_request = sub { 1 };
1125 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1126 our $CGI = 'CGI';
1127 our $cgi;
1128 sub configure_as_fcgi {
1129         require CGI::Fast;
1130         our $CGI = 'CGI::Fast';
1131
1132         my $request_number = 0;
1133         # let each child service 100 requests
1134         our $is_last_request = sub { ++$request_number > 100 };
1135 }
1136 sub evaluate_argv {
1137         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1138         configure_as_fcgi()
1139                 if $script_name =~ /\.fcgi$/;
1140
1141         return unless (@ARGV);
1142
1143         require Getopt::Long;
1144         Getopt::Long::GetOptions(
1145                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1146                 'nproc|n=i' => sub {
1147                         my ($arg, $val) = @_;
1148                         return unless eval { require FCGI::ProcManager; 1; };
1149                         my $proc_manager = FCGI::ProcManager->new({
1150                                 n_processes => $val,
1151                         });
1152                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1153                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1154                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1155                 },
1156         );
1157 }
1158
1159 sub run {
1160         evaluate_argv();
1161
1162         $first_request = 1;
1163         $pre_listen_hook->()
1164                 if $pre_listen_hook;
1165
1166  REQUEST:
1167         while ($cgi = $CGI->new()) {
1168                 $pre_dispatch_hook->()
1169                         if $pre_dispatch_hook;
1170
1171                 run_request();
1172
1173                 $post_dispatch_hook->()
1174                         if $post_dispatch_hook;
1175                 $first_request = 0;
1176
1177                 last REQUEST if ($is_last_request->());
1178         }
1179
1180  DONE_GITWEB:
1181         1;
1182 }
1183
1184 run();
1185
1186 if (defined caller) {
1187         # wrapped in a subroutine processing requests,
1188         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1189         return;
1190 } else {
1191         # pure CGI script, serving single request
1192         exit;
1193 }
1194
1195 ## ======================================================================
1196 ## action links
1197
1198 # possible values of extra options
1199 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1200 # -replay => 1      - start from a current view (replay with modifications)
1201 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1202 sub href {
1203         my %params = @_;
1204         # default is to use -absolute url() i.e. $my_uri
1205         my $href = $params{-full} ? $my_url : $my_uri;
1206
1207         $params{'project'} = $project unless exists $params{'project'};
1208
1209         if ($params{-replay}) {
1210                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1211                         if (!exists $params{$name}) {
1212                                 $params{$name} = $input_params{$name};
1213                         }
1214                 }
1215         }
1216
1217         my $use_pathinfo = gitweb_check_feature('pathinfo');
1218         if (defined $params{'project'} &&
1219             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1220                 # try to put as many parameters as possible in PATH_INFO:
1221                 #   - project name
1222                 #   - action
1223                 #   - hash_parent or hash_parent_base:/file_parent
1224                 #   - hash or hash_base:/filename
1225                 #   - the snapshot_format as an appropriate suffix
1226
1227                 # When the script is the root DirectoryIndex for the domain,
1228                 # $href here would be something like http://gitweb.example.com/
1229                 # Thus, we strip any trailing / from $href, to spare us double
1230                 # slashes in the final URL
1231                 $href =~ s,/$,,;
1232
1233                 # Then add the project name, if present
1234                 $href .= "/".esc_path_info($params{'project'});
1235                 delete $params{'project'};
1236
1237                 # since we destructively absorb parameters, we keep this
1238                 # boolean that remembers if we're handling a snapshot
1239                 my $is_snapshot = $params{'action'} eq 'snapshot';
1240
1241                 # Summary just uses the project path URL, any other action is
1242                 # added to the URL
1243                 if (defined $params{'action'}) {
1244                         $href .= "/".esc_path_info($params{'action'})
1245                                 unless $params{'action'} eq 'summary';
1246                         delete $params{'action'};
1247                 }
1248
1249                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1250                 # stripping nonexistent or useless pieces
1251                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1252                         || $params{'hash_parent'} || $params{'hash'});
1253                 if (defined $params{'hash_base'}) {
1254                         if (defined $params{'hash_parent_base'}) {
1255                                 $href .= esc_path_info($params{'hash_parent_base'});
1256                                 # skip the file_parent if it's the same as the file_name
1257                                 if (defined $params{'file_parent'}) {
1258                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1259                                                 delete $params{'file_parent'};
1260                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1261                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1262                                                 delete $params{'file_parent'};
1263                                         }
1264                                 }
1265                                 $href .= "..";
1266                                 delete $params{'hash_parent'};
1267                                 delete $params{'hash_parent_base'};
1268                         } elsif (defined $params{'hash_parent'}) {
1269                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1270                                 delete $params{'hash_parent'};
1271                         }
1272
1273                         $href .= esc_path_info($params{'hash_base'});
1274                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1275                                 $href .= ":/".esc_path_info($params{'file_name'});
1276                                 delete $params{'file_name'};
1277                         }
1278                         delete $params{'hash'};
1279                         delete $params{'hash_base'};
1280                 } elsif (defined $params{'hash'}) {
1281                         $href .= esc_path_info($params{'hash'});
1282                         delete $params{'hash'};
1283                 }
1284
1285                 # If the action was a snapshot, we can absorb the
1286                 # snapshot_format parameter too
1287                 if ($is_snapshot) {
1288                         my $fmt = $params{'snapshot_format'};
1289                         # snapshot_format should always be defined when href()
1290                         # is called, but just in case some code forgets, we
1291                         # fall back to the default
1292                         $fmt ||= $snapshot_fmts[0];
1293                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1294                         delete $params{'snapshot_format'};
1295                 }
1296         }
1297
1298         # now encode the parameters explicitly
1299         my @result = ();
1300         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1301                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1302                 if (defined $params{$name}) {
1303                         if (ref($params{$name}) eq "ARRAY") {
1304                                 foreach my $par (@{$params{$name}}) {
1305                                         push @result, $symbol . "=" . esc_param($par);
1306                                 }
1307                         } else {
1308                                 push @result, $symbol . "=" . esc_param($params{$name});
1309                         }
1310                 }
1311         }
1312         $href .= "?" . join(';', @result) if scalar @result;
1313
1314         # final transformation: trailing spaces must be escaped (URI-encoded)
1315         $href =~ s/(\s+)$/CGI::escape($1)/e;
1316
1317         return $href;
1318 }
1319
1320
1321 ## ======================================================================
1322 ## validation, quoting/unquoting and escaping
1323
1324 sub validate_action {
1325         my $input = shift || return undef;
1326         return undef unless exists $actions{$input};
1327         return $input;
1328 }
1329
1330 sub validate_project {
1331         my $input = shift || return undef;
1332         if (!validate_pathname($input) ||
1333                 !(-d "$projectroot/$input") ||
1334                 !check_export_ok("$projectroot/$input") ||
1335                 ($strict_export && !project_in_list($input))) {
1336                 return undef;
1337         } else {
1338                 return $input;
1339         }
1340 }
1341
1342 sub validate_pathname {
1343         my $input = shift || return undef;
1344
1345         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1346         # at the beginning, at the end, and between slashes.
1347         # also this catches doubled slashes
1348         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1349                 return undef;
1350         }
1351         # no null characters
1352         if ($input =~ m!\0!) {
1353                 return undef;
1354         }
1355         return $input;
1356 }
1357
1358 sub validate_refname {
1359         my $input = shift || return undef;
1360
1361         # textual hashes are O.K.
1362         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1363                 return $input;
1364         }
1365         # it must be correct pathname
1366         $input = validate_pathname($input)
1367                 or return undef;
1368         # restrictions on ref name according to git-check-ref-format
1369         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1370                 return undef;
1371         }
1372         return $input;
1373 }
1374
1375 # decode sequences of octets in utf8 into Perl's internal form,
1376 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1377 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1378 sub to_utf8 {
1379         my $str = shift;
1380         return undef unless defined $str;
1381         if (utf8::valid($str)) {
1382                 utf8::decode($str);
1383                 return $str;
1384         } else {
1385                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1386         }
1387 }
1388
1389 # quote unsafe chars, but keep the slash, even when it's not
1390 # correct, but quoted slashes look too horrible in bookmarks
1391 sub esc_param {
1392         my $str = shift;
1393         return undef unless defined $str;
1394         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1395         $str =~ s/ /\+/g;
1396         return $str;
1397 }
1398
1399 # the quoting rules for path_info fragment are slightly different
1400 sub esc_path_info {
1401         my $str = shift;
1402         return undef unless defined $str;
1403
1404         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1405         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1406
1407         return $str;
1408 }
1409
1410 # quote unsafe chars in whole URL, so some characters cannot be quoted
1411 sub esc_url {
1412         my $str = shift;
1413         return undef unless defined $str;
1414         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1415         $str =~ s/ /\+/g;
1416         return $str;
1417 }
1418
1419 # quote unsafe characters in HTML attributes
1420 sub esc_attr {
1421
1422         # for XHTML conformance escaping '"' to '&quot;' is not enough
1423         return esc_html(@_);
1424 }
1425
1426 # replace invalid utf8 character with SUBSTITUTION sequence
1427 sub esc_html {
1428         my $str = shift;
1429         my %opts = @_;
1430
1431         return undef unless defined $str;
1432
1433         $str = to_utf8($str);
1434         $str = $cgi->escapeHTML($str);
1435         if ($opts{'-nbsp'}) {
1436                 $str =~ s/ /&nbsp;/g;
1437         }
1438         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1439         return $str;
1440 }
1441
1442 # quote control characters and escape filename to HTML
1443 sub esc_path {
1444         my $str = shift;
1445         my %opts = @_;
1446
1447         return undef unless defined $str;
1448
1449         $str = to_utf8($str);
1450         $str = $cgi->escapeHTML($str);
1451         if ($opts{'-nbsp'}) {
1452                 $str =~ s/ /&nbsp;/g;
1453         }
1454         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1455         return $str;
1456 }
1457
1458 # Make control characters "printable", using character escape codes (CEC)
1459 sub quot_cec {
1460         my $cntrl = shift;
1461         my %opts = @_;
1462         my %es = ( # character escape codes, aka escape sequences
1463                 "\t" => '\t',   # tab            (HT)
1464                 "\n" => '\n',   # line feed      (LF)
1465                 "\r" => '\r',   # carrige return (CR)
1466                 "\f" => '\f',   # form feed      (FF)
1467                 "\b" => '\b',   # backspace      (BS)
1468                 "\a" => '\a',   # alarm (bell)   (BEL)
1469                 "\e" => '\e',   # escape         (ESC)
1470                 "\013" => '\v', # vertical tab   (VT)
1471                 "\000" => '\0', # nul character  (NUL)
1472         );
1473         my $chr = ( (exists $es{$cntrl})
1474                     ? $es{$cntrl}
1475                     : sprintf('\%2x', ord($cntrl)) );
1476         if ($opts{-nohtml}) {
1477                 return $chr;
1478         } else {
1479                 return "<span class=\"cntrl\">$chr</span>";
1480         }
1481 }
1482
1483 # Alternatively use unicode control pictures codepoints,
1484 # Unicode "printable representation" (PR)
1485 sub quot_upr {
1486         my $cntrl = shift;
1487         my %opts = @_;
1488
1489         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1490         if ($opts{-nohtml}) {
1491                 return $chr;
1492         } else {
1493                 return "<span class=\"cntrl\">$chr</span>";
1494         }
1495 }
1496
1497 # git may return quoted and escaped filenames
1498 sub unquote {
1499         my $str = shift;
1500
1501         sub unq {
1502                 my $seq = shift;
1503                 my %es = ( # character escape codes, aka escape sequences
1504                         't' => "\t",   # tab            (HT, TAB)
1505                         'n' => "\n",   # newline        (NL)
1506                         'r' => "\r",   # return         (CR)
1507                         'f' => "\f",   # form feed      (FF)
1508                         'b' => "\b",   # backspace      (BS)
1509                         'a' => "\a",   # alarm (bell)   (BEL)
1510                         'e' => "\e",   # escape         (ESC)
1511                         'v' => "\013", # vertical tab   (VT)
1512                 );
1513
1514                 if ($seq =~ m/^[0-7]{1,3}$/) {
1515                         # octal char sequence
1516                         return chr(oct($seq));
1517                 } elsif (exists $es{$seq}) {
1518                         # C escape sequence, aka character escape code
1519                         return $es{$seq};
1520                 }
1521                 # quoted ordinary character
1522                 return $seq;
1523         }
1524
1525         if ($str =~ m/^"(.*)"$/) {
1526                 # needs unquoting
1527                 $str = $1;
1528                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1529         }
1530         return $str;
1531 }
1532
1533 # escape tabs (convert tabs to spaces)
1534 sub untabify {
1535         my $line = shift;
1536
1537         while ((my $pos = index($line, "\t")) != -1) {
1538                 if (my $count = (8 - ($pos % 8))) {
1539                         my $spaces = ' ' x $count;
1540                         $line =~ s/\t/$spaces/;
1541                 }
1542         }
1543
1544         return $line;
1545 }
1546
1547 sub project_in_list {
1548         my $project = shift;
1549         my @list = git_get_projects_list();
1550         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1551 }
1552
1553 ## ----------------------------------------------------------------------
1554 ## HTML aware string manipulation
1555
1556 # Try to chop given string on a word boundary between position
1557 # $len and $len+$add_len. If there is no word boundary there,
1558 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1559 # (marking chopped part) would be longer than given string.
1560 sub chop_str {
1561         my $str = shift;
1562         my $len = shift;
1563         my $add_len = shift || 10;
1564         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1565
1566         # Make sure perl knows it is utf8 encoded so we don't
1567         # cut in the middle of a utf8 multibyte char.
1568         $str = to_utf8($str);
1569
1570         # allow only $len chars, but don't cut a word if it would fit in $add_len
1571         # if it doesn't fit, cut it if it's still longer than the dots we would add
1572         # remove chopped character entities entirely
1573
1574         # when chopping in the middle, distribute $len into left and right part
1575         # return early if chopping wouldn't make string shorter
1576         if ($where eq 'center') {
1577                 return $str if ($len + 5 >= length($str)); # filler is length 5
1578                 $len = int($len/2);
1579         } else {
1580                 return $str if ($len + 4 >= length($str)); # filler is length 4
1581         }
1582
1583         # regexps: ending and beginning with word part up to $add_len
1584         my $endre = qr/.{$len}\w{0,$add_len}/;
1585         my $begre = qr/\w{0,$add_len}.{$len}/;
1586
1587         if ($where eq 'left') {
1588                 $str =~ m/^(.*?)($begre)$/;
1589                 my ($lead, $body) = ($1, $2);
1590                 if (length($lead) > 4) {
1591                         $lead = " ...";
1592                 }
1593                 return "$lead$body";
1594
1595         } elsif ($where eq 'center') {
1596                 $str =~ m/^($endre)(.*)$/;
1597                 my ($left, $str)  = ($1, $2);
1598                 $str =~ m/^(.*?)($begre)$/;
1599                 my ($mid, $right) = ($1, $2);
1600                 if (length($mid) > 5) {
1601                         $mid = " ... ";
1602                 }
1603                 return "$left$mid$right";
1604
1605         } else {
1606                 $str =~ m/^($endre)(.*)$/;
1607                 my $body = $1;
1608                 my $tail = $2;
1609                 if (length($tail) > 4) {
1610                         $tail = "... ";
1611                 }
1612                 return "$body$tail";
1613         }
1614 }
1615
1616 # takes the same arguments as chop_str, but also wraps a <span> around the
1617 # result with a title attribute if it does get chopped. Additionally, the
1618 # string is HTML-escaped.
1619 sub chop_and_escape_str {
1620         my ($str) = @_;
1621
1622         my $chopped = chop_str(@_);
1623         if ($chopped eq $str) {
1624                 return esc_html($chopped);
1625         } else {
1626                 $str =~ s/[[:cntrl:]]/?/g;
1627                 return $cgi->span({-title=>$str}, esc_html($chopped));
1628         }
1629 }
1630
1631 ## ----------------------------------------------------------------------
1632 ## functions returning short strings
1633
1634 # CSS class for given age value (in seconds)
1635 sub age_class {
1636         my $age = shift;
1637
1638         if (!defined $age) {
1639                 return "noage";
1640         } elsif ($age < 60*60*2) {
1641                 return "age0";
1642         } elsif ($age < 60*60*24*2) {
1643                 return "age1";
1644         } else {
1645                 return "age2";
1646         }
1647 }
1648
1649 # convert age in seconds to "nn units ago" string
1650 sub age_string {
1651         my $age = shift;
1652         my $age_str;
1653
1654         if ($age > 60*60*24*365*2) {
1655                 $age_str = (int $age/60/60/24/365);
1656                 $age_str .= " years ago";
1657         } elsif ($age > 60*60*24*(365/12)*2) {
1658                 $age_str = int $age/60/60/24/(365/12);
1659                 $age_str .= " months ago";
1660         } elsif ($age > 60*60*24*7*2) {
1661                 $age_str = int $age/60/60/24/7;
1662                 $age_str .= " weeks ago";
1663         } elsif ($age > 60*60*24*2) {
1664                 $age_str = int $age/60/60/24;
1665                 $age_str .= " days ago";
1666         } elsif ($age > 60*60*2) {
1667                 $age_str = int $age/60/60;
1668                 $age_str .= " hours ago";
1669         } elsif ($age > 60*2) {
1670                 $age_str = int $age/60;
1671                 $age_str .= " min ago";
1672         } elsif ($age > 2) {
1673                 $age_str = int $age;
1674                 $age_str .= " sec ago";
1675         } else {
1676                 $age_str .= " right now";
1677         }
1678         return $age_str;
1679 }
1680
1681 use constant {
1682         S_IFINVALID => 0030000,
1683         S_IFGITLINK => 0160000,
1684 };
1685
1686 # submodule/subproject, a commit object reference
1687 sub S_ISGITLINK {
1688         my $mode = shift;
1689
1690         return (($mode & S_IFMT) == S_IFGITLINK)
1691 }
1692
1693 # convert file mode in octal to symbolic file mode string
1694 sub mode_str {
1695         my $mode = oct shift;
1696
1697         if (S_ISGITLINK($mode)) {
1698                 return 'm---------';
1699         } elsif (S_ISDIR($mode & S_IFMT)) {
1700                 return 'drwxr-xr-x';
1701         } elsif (S_ISLNK($mode)) {
1702                 return 'lrwxrwxrwx';
1703         } elsif (S_ISREG($mode)) {
1704                 # git cares only about the executable bit
1705                 if ($mode & S_IXUSR) {
1706                         return '-rwxr-xr-x';
1707                 } else {
1708                         return '-rw-r--r--';
1709                 };
1710         } else {
1711                 return '----------';
1712         }
1713 }
1714
1715 # convert file mode in octal to file type string
1716 sub file_type {
1717         my $mode = shift;
1718
1719         if ($mode !~ m/^[0-7]+$/) {
1720                 return $mode;
1721         } else {
1722                 $mode = oct $mode;
1723         }
1724
1725         if (S_ISGITLINK($mode)) {
1726                 return "submodule";
1727         } elsif (S_ISDIR($mode & S_IFMT)) {
1728                 return "directory";
1729         } elsif (S_ISLNK($mode)) {
1730                 return "symlink";
1731         } elsif (S_ISREG($mode)) {
1732                 return "file";
1733         } else {
1734                 return "unknown";
1735         }
1736 }
1737
1738 # convert file mode in octal to file type description string
1739 sub file_type_long {
1740         my $mode = shift;
1741
1742         if ($mode !~ m/^[0-7]+$/) {
1743                 return $mode;
1744         } else {
1745                 $mode = oct $mode;
1746         }
1747
1748         if (S_ISGITLINK($mode)) {
1749                 return "submodule";
1750         } elsif (S_ISDIR($mode & S_IFMT)) {
1751                 return "directory";
1752         } elsif (S_ISLNK($mode)) {
1753                 return "symlink";
1754         } elsif (S_ISREG($mode)) {
1755                 if ($mode & S_IXUSR) {
1756                         return "executable";
1757                 } else {
1758                         return "file";
1759                 };
1760         } else {
1761                 return "unknown";
1762         }
1763 }
1764
1765
1766 ## ----------------------------------------------------------------------
1767 ## functions returning short HTML fragments, or transforming HTML fragments
1768 ## which don't belong to other sections
1769
1770 # format line of commit message.
1771 sub format_log_line_html {
1772         my $line = shift;
1773
1774         $line = esc_html($line, -nbsp=>1);
1775         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1776                 $cgi->a({-href => href(action=>"object", hash=>$1),
1777                                         -class => "text"}, $1);
1778         }eg;
1779
1780         return $line;
1781 }
1782
1783 # format marker of refs pointing to given object
1784
1785 # the destination action is chosen based on object type and current context:
1786 # - for annotated tags, we choose the tag view unless it's the current view
1787 #   already, in which case we go to shortlog view
1788 # - for other refs, we keep the current view if we're in history, shortlog or
1789 #   log view, and select shortlog otherwise
1790 sub format_ref_marker {
1791         my ($refs, $id) = @_;
1792         my $markers = '';
1793
1794         if (defined $refs->{$id}) {
1795                 foreach my $ref (@{$refs->{$id}}) {
1796                         # this code exploits the fact that non-lightweight tags are the
1797                         # only indirect objects, and that they are the only objects for which
1798                         # we want to use tag instead of shortlog as action
1799                         my ($type, $name) = qw();
1800                         my $indirect = ($ref =~ s/\^\{\}$//);
1801                         # e.g. tags/v2.6.11 or heads/next
1802                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1803                                 $type = $1;
1804                                 $name = $2;
1805                         } else {
1806                                 $type = "ref";
1807                                 $name = $ref;
1808                         }
1809
1810                         my $class = $type;
1811                         $class .= " indirect" if $indirect;
1812
1813                         my $dest_action = "shortlog";
1814
1815                         if ($indirect) {
1816                                 $dest_action = "tag" unless $action eq "tag";
1817                         } elsif ($action =~ /^(history|(short)?log)$/) {
1818                                 $dest_action = $action;
1819                         }
1820
1821                         my $dest = "";
1822                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1823                         $dest .= $ref;
1824
1825                         my $link = $cgi->a({
1826                                 -href => href(
1827                                         action=>$dest_action,
1828                                         hash=>$dest
1829                                 )}, $name);
1830
1831                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1832                                 $link . "</span>";
1833                 }
1834         }
1835
1836         if ($markers) {
1837                 return ' <span class="refs">'. $markers . '</span>';
1838         } else {
1839                 return "";
1840         }
1841 }
1842
1843 # format, perhaps shortened and with markers, title line
1844 sub format_subject_html {
1845         my ($long, $short, $href, $extra) = @_;
1846         $extra = '' unless defined($extra);
1847
1848         if (length($short) < length($long)) {
1849                 $long =~ s/[[:cntrl:]]/?/g;
1850                 return $cgi->a({-href => $href, -class => "list subject",
1851                                 -title => to_utf8($long)},
1852                        esc_html($short)) . $extra;
1853         } else {
1854                 return $cgi->a({-href => $href, -class => "list subject"},
1855                        esc_html($long)) . $extra;
1856         }
1857 }
1858
1859 # Rather than recomputing the url for an email multiple times, we cache it
1860 # after the first hit. This gives a visible benefit in views where the avatar
1861 # for the same email is used repeatedly (e.g. shortlog).
1862 # The cache is shared by all avatar engines (currently gravatar only), which
1863 # are free to use it as preferred. Since only one avatar engine is used for any
1864 # given page, there's no risk for cache conflicts.
1865 our %avatar_cache = ();
1866
1867 # Compute the picon url for a given email, by using the picon search service over at
1868 # http://www.cs.indiana.edu/picons/search.html
1869 sub picon_url {
1870         my $email = lc shift;
1871         if (!$avatar_cache{$email}) {
1872                 my ($user, $domain) = split('@', $email);
1873                 $avatar_cache{$email} =
1874                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1875                         "$domain/$user/" .
1876                         "users+domains+unknown/up/single";
1877         }
1878         return $avatar_cache{$email};
1879 }
1880
1881 # Compute the gravatar url for a given email, if it's not in the cache already.
1882 # Gravatar stores only the part of the URL before the size, since that's the
1883 # one computationally more expensive. This also allows reuse of the cache for
1884 # different sizes (for this particular engine).
1885 sub gravatar_url {
1886         my $email = lc shift;
1887         my $size = shift;
1888         $avatar_cache{$email} ||=
1889                 "http://www.gravatar.com/avatar/" .
1890                         Digest::MD5::md5_hex($email) . "?s=";
1891         return $avatar_cache{$email} . $size;
1892 }
1893
1894 # Insert an avatar for the given $email at the given $size if the feature
1895 # is enabled.
1896 sub git_get_avatar {
1897         my ($email, %opts) = @_;
1898         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1899         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1900         $opts{-size} ||= 'default';
1901         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1902         my $url = "";
1903         if ($git_avatar eq 'gravatar') {
1904                 $url = gravatar_url($email, $size);
1905         } elsif ($git_avatar eq 'picon') {
1906                 $url = picon_url($email);
1907         }
1908         # Other providers can be added by extending the if chain, defining $url
1909         # as needed. If no variant puts something in $url, we assume avatars
1910         # are completely disabled/unavailable.
1911         if ($url) {
1912                 return $pre_white .
1913                        "<img width=\"$size\" " .
1914                             "class=\"avatar\" " .
1915                             "src=\"".esc_url($url)."\" " .
1916                             "alt=\"\" " .
1917                        "/>" . $post_white;
1918         } else {
1919                 return "";
1920         }
1921 }
1922
1923 sub format_search_author {
1924         my ($author, $searchtype, $displaytext) = @_;
1925         my $have_search = gitweb_check_feature('search');
1926
1927         if ($have_search) {
1928                 my $performed = "";
1929                 if ($searchtype eq 'author') {
1930                         $performed = "authored";
1931                 } elsif ($searchtype eq 'committer') {
1932                         $performed = "committed";
1933                 }
1934
1935                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1936                                 searchtext=>$author,
1937                                 searchtype=>$searchtype), class=>"list",
1938                                 title=>"Search for commits $performed by $author"},
1939                                 $displaytext);
1940
1941         } else {
1942                 return $displaytext;
1943         }
1944 }
1945
1946 # format the author name of the given commit with the given tag
1947 # the author name is chopped and escaped according to the other
1948 # optional parameters (see chop_str).
1949 sub format_author_html {
1950         my $tag = shift;
1951         my $co = shift;
1952         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1953         return "<$tag class=\"author\">" .
1954                format_search_author($co->{'author_name'}, "author",
1955                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1956                        $author) .
1957                "</$tag>";
1958 }
1959
1960 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1961 sub format_git_diff_header_line {
1962         my $line = shift;
1963         my $diffinfo = shift;
1964         my ($from, $to) = @_;
1965
1966         if ($diffinfo->{'nparents'}) {
1967                 # combined diff
1968                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1969                 if ($to->{'href'}) {
1970                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1971                                          esc_path($to->{'file'}));
1972                 } else { # file was deleted (no href)
1973                         $line .= esc_path($to->{'file'});
1974                 }
1975         } else {
1976                 # "ordinary" diff
1977                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1978                 if ($from->{'href'}) {
1979                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1980                                          'a/' . esc_path($from->{'file'}));
1981                 } else { # file was added (no href)
1982                         $line .= 'a/' . esc_path($from->{'file'});
1983                 }
1984                 $line .= ' ';
1985                 if ($to->{'href'}) {
1986                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1987                                          'b/' . esc_path($to->{'file'}));
1988                 } else { # file was deleted
1989                         $line .= 'b/' . esc_path($to->{'file'});
1990                 }
1991         }
1992
1993         return "<div class=\"diff header\">$line</div>\n";
1994 }
1995
1996 # format extended diff header line, before patch itself
1997 sub format_extended_diff_header_line {
1998         my $line = shift;
1999         my $diffinfo = shift;
2000         my ($from, $to) = @_;
2001
2002         # match <path>
2003         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2004                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2005                                        esc_path($from->{'file'}));
2006         }
2007         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2008                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2009                                  esc_path($to->{'file'}));
2010         }
2011         # match single <mode>
2012         if ($line =~ m/\s(\d{6})$/) {
2013                 $line .= '<span class="info"> (' .
2014                          file_type_long($1) .
2015                          ')</span>';
2016         }
2017         # match <hash>
2018         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2019                 # can match only for combined diff
2020                 $line = 'index ';
2021                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2022                         if ($from->{'href'}[$i]) {
2023                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2024                                                   -class=>"hash"},
2025                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2026                         } else {
2027                                 $line .= '0' x 7;
2028                         }
2029                         # separator
2030                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2031                 }
2032                 $line .= '..';
2033                 if ($to->{'href'}) {
2034                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2035                                          substr($diffinfo->{'to_id'},0,7));
2036                 } else {
2037                         $line .= '0' x 7;
2038                 }
2039
2040         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2041                 # can match only for ordinary diff
2042                 my ($from_link, $to_link);
2043                 if ($from->{'href'}) {
2044                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2045                                              substr($diffinfo->{'from_id'},0,7));
2046                 } else {
2047                         $from_link = '0' x 7;
2048                 }
2049                 if ($to->{'href'}) {
2050                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2051                                            substr($diffinfo->{'to_id'},0,7));
2052                 } else {
2053                         $to_link = '0' x 7;
2054                 }
2055                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2056                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2057         }
2058
2059         return $line . "<br/>\n";
2060 }
2061
2062 # format from-file/to-file diff header
2063 sub format_diff_from_to_header {
2064         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2065         my $line;
2066         my $result = '';
2067
2068         $line = $from_line;
2069         #assert($line =~ m/^---/) if DEBUG;
2070         # no extra formatting for "^--- /dev/null"
2071         if (! $diffinfo->{'nparents'}) {
2072                 # ordinary (single parent) diff
2073                 if ($line =~ m!^--- "?a/!) {
2074                         if ($from->{'href'}) {
2075                                 $line = '--- a/' .
2076                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2077                                                 esc_path($from->{'file'}));
2078                         } else {
2079                                 $line = '--- a/' .
2080                                         esc_path($from->{'file'});
2081                         }
2082                 }
2083                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2084
2085         } else {
2086                 # combined diff (merge commit)
2087                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2088                         if ($from->{'href'}[$i]) {
2089                                 $line = '--- ' .
2090                                         $cgi->a({-href=>href(action=>"blobdiff",
2091                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2092                                                              hash_parent_base=>$parents[$i],
2093                                                              file_parent=>$from->{'file'}[$i],
2094                                                              hash=>$diffinfo->{'to_id'},
2095                                                              hash_base=>$hash,
2096                                                              file_name=>$to->{'file'}),
2097                                                  -class=>"path",
2098                                                  -title=>"diff" . ($i+1)},
2099                                                 $i+1) .
2100                                         '/' .
2101                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2102                                                 esc_path($from->{'file'}[$i]));
2103                         } else {
2104                                 $line = '--- /dev/null';
2105                         }
2106                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2107                 }
2108         }
2109
2110         $line = $to_line;
2111         #assert($line =~ m/^\+\+\+/) if DEBUG;
2112         # no extra formatting for "^+++ /dev/null"
2113         if ($line =~ m!^\+\+\+ "?b/!) {
2114                 if ($to->{'href'}) {
2115                         $line = '+++ b/' .
2116                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2117                                         esc_path($to->{'file'}));
2118                 } else {
2119                         $line = '+++ b/' .
2120                                 esc_path($to->{'file'});
2121                 }
2122         }
2123         $result .= qq!<div class="diff to_file">$line</div>\n!;
2124
2125         return $result;
2126 }
2127
2128 # create note for patch simplified by combined diff
2129 sub format_diff_cc_simplified {
2130         my ($diffinfo, @parents) = @_;
2131         my $result = '';
2132
2133         $result .= "<div class=\"diff header\">" .
2134                    "diff --cc ";
2135         if (!is_deleted($diffinfo)) {
2136                 $result .= $cgi->a({-href => href(action=>"blob",
2137                                                   hash_base=>$hash,
2138                                                   hash=>$diffinfo->{'to_id'},
2139                                                   file_name=>$diffinfo->{'to_file'}),
2140                                     -class => "path"},
2141                                    esc_path($diffinfo->{'to_file'}));
2142         } else {
2143                 $result .= esc_path($diffinfo->{'to_file'});
2144         }
2145         $result .= "</div>\n" . # class="diff header"
2146                    "<div class=\"diff nodifferences\">" .
2147                    "Simple merge" .
2148                    "</div>\n"; # class="diff nodifferences"
2149
2150         return $result;
2151 }
2152
2153 # format patch (diff) line (not to be used for diff headers)
2154 sub format_diff_line {
2155         my $line = shift;
2156         my ($from, $to) = @_;
2157         my $diff_class = "";
2158
2159         chomp $line;
2160
2161         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2162                 # combined diff
2163                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2164                 if ($line =~ m/^\@{3}/) {
2165                         $diff_class = " chunk_header";
2166                 } elsif ($line =~ m/^\\/) {
2167                         $diff_class = " incomplete";
2168                 } elsif ($prefix =~ tr/+/+/) {
2169                         $diff_class = " add";
2170                 } elsif ($prefix =~ tr/-/-/) {
2171                         $diff_class = " rem";
2172                 }
2173         } else {
2174                 # assume ordinary diff
2175                 my $char = substr($line, 0, 1);
2176                 if ($char eq '+') {
2177                         $diff_class = " add";
2178                 } elsif ($char eq '-') {
2179                         $diff_class = " rem";
2180                 } elsif ($char eq '@') {
2181                         $diff_class = " chunk_header";
2182                 } elsif ($char eq "\\") {
2183                         $diff_class = " incomplete";
2184                 }
2185         }
2186         $line = untabify($line);
2187         if ($from && $to && $line =~ m/^\@{2} /) {
2188                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2189                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2190
2191                 $from_lines = 0 unless defined $from_lines;
2192                 $to_lines   = 0 unless defined $to_lines;
2193
2194                 if ($from->{'href'}) {
2195                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2196                                              -class=>"list"}, $from_text);
2197                 }
2198                 if ($to->{'href'}) {
2199                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2200                                              -class=>"list"}, $to_text);
2201                 }
2202                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2203                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2204                 return "<div class=\"diff$diff_class\">$line</div>\n";
2205         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2206                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2207                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2208
2209                 @from_text = split(' ', $ranges);
2210                 for (my $i = 0; $i < @from_text; ++$i) {
2211                         ($from_start[$i], $from_nlines[$i]) =
2212                                 (split(',', substr($from_text[$i], 1)), 0);
2213                 }
2214
2215                 $to_text   = pop @from_text;
2216                 $to_start  = pop @from_start;
2217                 $to_nlines = pop @from_nlines;
2218
2219                 $line = "<span class=\"chunk_info\">$prefix ";
2220                 for (my $i = 0; $i < @from_text; ++$i) {
2221                         if ($from->{'href'}[$i]) {
2222                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2223                                                   -class=>"list"}, $from_text[$i]);
2224                         } else {
2225                                 $line .= $from_text[$i];
2226                         }
2227                         $line .= " ";
2228                 }
2229                 if ($to->{'href'}) {
2230                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2231                                           -class=>"list"}, $to_text);
2232                 } else {
2233                         $line .= $to_text;
2234                 }
2235                 $line .= " $prefix</span>" .
2236                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2237                 return "<div class=\"diff$diff_class\">$line</div>\n";
2238         }
2239         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2240 }
2241
2242 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2243 # linked.  Pass the hash of the tree/commit to snapshot.
2244 sub format_snapshot_links {
2245         my ($hash) = @_;
2246         my $num_fmts = @snapshot_fmts;
2247         if ($num_fmts > 1) {
2248                 # A parenthesized list of links bearing format names.
2249                 # e.g. "snapshot (_tar.gz_ _zip_)"
2250                 return "snapshot (" . join(' ', map
2251                         $cgi->a({
2252                                 -href => href(
2253                                         action=>"snapshot",
2254                                         hash=>$hash,
2255                                         snapshot_format=>$_
2256                                 )
2257                         }, $known_snapshot_formats{$_}{'display'})
2258                 , @snapshot_fmts) . ")";
2259         } elsif ($num_fmts == 1) {
2260                 # A single "snapshot" link whose tooltip bears the format name.
2261                 # i.e. "_snapshot_"
2262                 my ($fmt) = @snapshot_fmts;
2263                 return
2264                         $cgi->a({
2265                                 -href => href(
2266                                         action=>"snapshot",
2267                                         hash=>$hash,
2268                                         snapshot_format=>$fmt
2269                                 ),
2270                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2271                         }, "snapshot");
2272         } else { # $num_fmts == 0
2273                 return undef;
2274         }
2275 }
2276
2277 ## ......................................................................
2278 ## functions returning values to be passed, perhaps after some
2279 ## transformation, to other functions; e.g. returning arguments to href()
2280
2281 # returns hash to be passed to href to generate gitweb URL
2282 # in -title key it returns description of link
2283 sub get_feed_info {
2284         my $format = shift || 'Atom';
2285         my %res = (action => lc($format));
2286
2287         # feed links are possible only for project views
2288         return unless (defined $project);
2289         # some views should link to OPML, or to generic project feed,
2290         # or don't have specific feed yet (so they should use generic)
2291         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2292
2293         my $branch;
2294         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2295         # from tag links; this also makes possible to detect branch links
2296         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2297             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2298                 $branch = $1;
2299         }
2300         # find log type for feed description (title)
2301         my $type = 'log';
2302         if (defined $file_name) {
2303                 $type  = "history of $file_name";
2304                 $type .= "/" if ($action eq 'tree');
2305                 $type .= " on '$branch'" if (defined $branch);
2306         } else {
2307                 $type = "log of $branch" if (defined $branch);
2308         }
2309
2310         $res{-title} = $type;
2311         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2312         $res{'file_name'} = $file_name;
2313
2314         return %res;
2315 }
2316
2317 ## ----------------------------------------------------------------------
2318 ## git utility subroutines, invoking git commands
2319
2320 # returns path to the core git executable and the --git-dir parameter as list
2321 sub git_cmd {
2322         $number_of_git_cmds++;
2323         return $GIT, '--git-dir='.$git_dir;
2324 }
2325
2326 # quote the given arguments for passing them to the shell
2327 # quote_command("command", "arg 1", "arg with ' and ! characters")
2328 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2329 # Try to avoid using this function wherever possible.
2330 sub quote_command {
2331         return join(' ',
2332                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2333 }
2334
2335 # get HEAD ref of given project as hash
2336 sub git_get_head_hash {
2337         return git_get_full_hash(shift, 'HEAD');
2338 }
2339
2340 sub git_get_full_hash {
2341         return git_get_hash(@_);
2342 }
2343
2344 sub git_get_short_hash {
2345         return git_get_hash(@_, '--short=7');
2346 }
2347
2348 sub git_get_hash {
2349         my ($project, $hash, @options) = @_;
2350         my $o_git_dir = $git_dir;
2351         my $retval = undef;
2352         $git_dir = "$projectroot/$project";
2353         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2354             '--verify', '-q', @options, $hash) {
2355                 $retval = <$fd>;
2356                 chomp $retval if defined $retval;
2357                 close $fd;
2358         }
2359         if (defined $o_git_dir) {
2360                 $git_dir = $o_git_dir;
2361         }
2362         return $retval;
2363 }
2364
2365 # get type of given object
2366 sub git_get_type {
2367         my $hash = shift;
2368
2369         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2370         my $type = <$fd>;
2371         close $fd or return;
2372         chomp $type;
2373         return $type;
2374 }
2375
2376 # repository configuration
2377 our $config_file = '';
2378 our %config;
2379
2380 # store multiple values for single key as anonymous array reference
2381 # single values stored directly in the hash, not as [ <value> ]
2382 sub hash_set_multi {
2383         my ($hash, $key, $value) = @_;
2384
2385         if (!exists $hash->{$key}) {
2386                 $hash->{$key} = $value;
2387         } elsif (!ref $hash->{$key}) {
2388                 $hash->{$key} = [ $hash->{$key}, $value ];
2389         } else {
2390                 push @{$hash->{$key}}, $value;
2391         }
2392 }
2393
2394 # return hash of git project configuration
2395 # optionally limited to some section, e.g. 'gitweb'
2396 sub git_parse_project_config {
2397         my $section_regexp = shift;
2398         my %config;
2399
2400         local $/ = "\0";
2401
2402         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2403                 or return;
2404
2405         while (my $keyval = <$fh>) {
2406                 chomp $keyval;
2407                 my ($key, $value) = split(/\n/, $keyval, 2);
2408
2409                 hash_set_multi(\%config, $key, $value)
2410                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2411         }
2412         close $fh;
2413
2414         return %config;
2415 }
2416
2417 # convert config value to boolean: 'true' or 'false'
2418 # no value, number > 0, 'true' and 'yes' values are true
2419 # rest of values are treated as false (never as error)
2420 sub config_to_bool {
2421         my $val = shift;
2422
2423         return 1 if !defined $val;             # section.key
2424
2425         # strip leading and trailing whitespace
2426         $val =~ s/^\s+//;
2427         $val =~ s/\s+$//;
2428
2429         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2430                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2431 }
2432
2433 # convert config value to simple decimal number
2434 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2435 # to be multiplied by 1024, 1048576, or 1073741824
2436 sub config_to_int {
2437         my $val = shift;
2438
2439         # strip leading and trailing whitespace
2440         $val =~ s/^\s+//;
2441         $val =~ s/\s+$//;
2442
2443         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2444                 $unit = lc($unit);
2445                 # unknown unit is treated as 1
2446                 return $num * ($unit eq 'g' ? 1073741824 :
2447                                $unit eq 'm' ?    1048576 :
2448                                $unit eq 'k' ?       1024 : 1);
2449         }
2450         return $val;
2451 }
2452
2453 # convert config value to array reference, if needed
2454 sub config_to_multi {
2455         my $val = shift;
2456
2457         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2458 }
2459
2460 sub git_get_project_config {
2461         my ($key, $type) = @_;
2462
2463         return unless defined $git_dir;
2464
2465         # key sanity check
2466         return unless ($key);
2467         $key =~ s/^gitweb\.//;
2468         return if ($key =~ m/\W/);
2469
2470         # type sanity check
2471         if (defined $type) {
2472                 $type =~ s/^--//;
2473                 $type = undef
2474                         unless ($type eq 'bool' || $type eq 'int');
2475         }
2476
2477         # get config
2478         if (!defined $config_file ||
2479             $config_file ne "$git_dir/config") {
2480                 %config = git_parse_project_config('gitweb');
2481                 $config_file = "$git_dir/config";
2482         }
2483
2484         # check if config variable (key) exists
2485         return unless exists $config{"gitweb.$key"};
2486
2487         # ensure given type
2488         if (!defined $type) {
2489                 return $config{"gitweb.$key"};
2490         } elsif ($type eq 'bool') {
2491                 # backward compatibility: 'git config --bool' returns true/false
2492                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2493         } elsif ($type eq 'int') {
2494                 return config_to_int($config{"gitweb.$key"});
2495         }
2496         return $config{"gitweb.$key"};
2497 }
2498
2499 # get hash of given path at given ref
2500 sub git_get_hash_by_path {
2501         my $base = shift;
2502         my $path = shift || return undef;
2503         my $type = shift;
2504
2505         $path =~ s,/+$,,;
2506
2507         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2508                 or die_error(500, "Open git-ls-tree failed");
2509         my $line = <$fd>;
2510         close $fd or return undef;
2511
2512         if (!defined $line) {
2513                 # there is no tree or hash given by $path at $base
2514                 return undef;
2515         }
2516
2517         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2518         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2519         if (defined $type && $type ne $2) {
2520                 # type doesn't match
2521                 return undef;
2522         }
2523         return $3;
2524 }
2525
2526 # get path of entry with given hash at given tree-ish (ref)
2527 # used to get 'from' filename for combined diff (merge commit) for renames
2528 sub git_get_path_by_hash {
2529         my $base = shift || return;
2530         my $hash = shift || return;
2531
2532         local $/ = "\0";
2533
2534         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2535                 or return undef;
2536         while (my $line = <$fd>) {
2537                 chomp $line;
2538
2539                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2540                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2541                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2542                         close $fd;
2543                         return $1;
2544                 }
2545         }
2546         close $fd;
2547         return undef;
2548 }
2549
2550 ## ......................................................................
2551 ## git utility functions, directly accessing git repository
2552
2553 sub git_get_project_description {
2554         my $path = shift;
2555
2556         $git_dir = "$projectroot/$path";
2557         open my $fd, '<', "$git_dir/description"
2558                 or return git_get_project_config('description');
2559         my $descr = <$fd>;
2560         close $fd;
2561         if (defined $descr) {
2562                 chomp $descr;
2563         }
2564         return $descr;
2565 }
2566
2567 sub git_get_project_ctags {
2568         my $path = shift;
2569         my $ctags = {};
2570
2571         $git_dir = "$projectroot/$path";
2572         opendir my $dh, "$git_dir/ctags"
2573                 or return $ctags;
2574         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2575                 open my $ct, '<', $_ or next;
2576                 my $val = <$ct>;
2577                 chomp $val;
2578                 close $ct;
2579                 my $ctag = $_; $ctag =~ s#.*/##;
2580                 $ctags->{$ctag} = $val;
2581         }
2582         closedir $dh;
2583         $ctags;
2584 }
2585
2586 sub git_populate_project_tagcloud {
2587         my $ctags = shift;
2588
2589         # First, merge different-cased tags; tags vote on casing
2590         my %ctags_lc;
2591         foreach (keys %$ctags) {
2592                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2593                 if (not $ctags_lc{lc $_}->{topcount}
2594                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2595                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2596                         $ctags_lc{lc $_}->{topname} = $_;
2597                 }
2598         }
2599
2600         my $cloud;
2601         if (eval { require HTML::TagCloud; 1; }) {
2602                 $cloud = HTML::TagCloud->new;
2603                 foreach (sort keys %ctags_lc) {
2604                         # Pad the title with spaces so that the cloud looks
2605                         # less crammed.
2606                         my $title = $ctags_lc{$_}->{topname};
2607                         $title =~ s/ /&nbsp;/g;
2608                         $title =~ s/^/&nbsp;/g;
2609                         $title =~ s/$/&nbsp;/g;
2610                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2611                 }
2612         } else {
2613                 $cloud = \%ctags_lc;
2614         }
2615         $cloud;
2616 }
2617
2618 sub git_show_project_tagcloud {
2619         my ($cloud, $count) = @_;
2620         print STDERR ref($cloud)."..\n";
2621         if (ref $cloud eq 'HTML::TagCloud') {
2622                 return $cloud->html_and_css($count);
2623         } else {
2624                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2625                 return '<p align="center">' . join (', ', map {
2626                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2627                 } splice(@tags, 0, $count)) . '</p>';
2628         }
2629 }
2630
2631 sub git_get_project_url_list {
2632         my $path = shift;
2633
2634         $git_dir = "$projectroot/$path";
2635         open my $fd, '<', "$git_dir/cloneurl"
2636                 or return wantarray ?
2637                 @{ config_to_multi(git_get_project_config('url')) } :
2638                    config_to_multi(git_get_project_config('url'));
2639         my @git_project_url_list = map { chomp; $_ } <$fd>;
2640         close $fd;
2641
2642         return wantarray ? @git_project_url_list : \@git_project_url_list;
2643 }
2644
2645 sub git_get_projects_list {
2646         my ($filter) = @_;
2647         my @list;
2648
2649         $filter ||= '';
2650         $filter =~ s/\.git$//;
2651
2652         my $check_forks = gitweb_check_feature('forks');
2653
2654         if (-d $projects_list) {
2655                 # search in directory
2656                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2657                 # remove the trailing "/"
2658                 $dir =~ s!/+$!!;
2659                 my $pfxlen = length("$dir");
2660                 my $pfxdepth = ($dir =~ tr!/!!);
2661
2662                 File::Find::find({
2663                         follow_fast => 1, # follow symbolic links
2664                         follow_skip => 2, # ignore duplicates
2665                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2666                         wanted => sub {
2667                                 # global variables
2668                                 our $project_maxdepth;
2669                                 our $projectroot;
2670                                 # skip project-list toplevel, if we get it.
2671                                 return if (m!^[/.]$!);
2672                                 # only directories can be git repositories
2673                                 return unless (-d $_);
2674                                 # don't traverse too deep (Find is super slow on os x)
2675                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2676                                         $File::Find::prune = 1;
2677                                         return;
2678                                 }
2679
2680                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2681                                 # we check related file in $projectroot
2682                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2683                                 if (check_export_ok("$projectroot/$path")) {
2684                                         push @list, { path => $path };
2685                                         $File::Find::prune = 1;
2686                                 }
2687                         },
2688                 }, "$dir");
2689
2690         } elsif (-f $projects_list) {
2691                 # read from file(url-encoded):
2692                 # 'git%2Fgit.git Linus+Torvalds'
2693                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2694                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2695                 my %paths;
2696                 open my $fd, '<', $projects_list or return;
2697         PROJECT:
2698                 while (my $line = <$fd>) {
2699                         chomp $line;
2700                         my ($path, $owner) = split ' ', $line;
2701                         $path = unescape($path);
2702                         $owner = unescape($owner);
2703                         if (!defined $path) {
2704                                 next;
2705                         }
2706                         if ($filter ne '') {
2707                                 # looking for forks;
2708                                 my $pfx = substr($path, 0, length($filter));
2709                                 if ($pfx ne $filter) {
2710                                         next PROJECT;
2711                                 }
2712                                 my $sfx = substr($path, length($filter));
2713                                 if ($sfx !~ /^\/.*\.git$/) {
2714                                         next PROJECT;
2715                                 }
2716                         } elsif ($check_forks) {
2717                         PATH:
2718                                 foreach my $filter (keys %paths) {
2719                                         # looking for forks;
2720                                         my $pfx = substr($path, 0, length($filter));
2721                                         if ($pfx ne $filter) {
2722                                                 next PATH;
2723                                         }
2724                                         my $sfx = substr($path, length($filter));
2725                                         if ($sfx !~ /^\/.*\.git$/) {
2726                                                 next PATH;
2727                                         }
2728                                         # is a fork, don't include it in
2729                                         # the list
2730                                         next PROJECT;
2731                                 }
2732                         }
2733                         if (check_export_ok("$projectroot/$path")) {
2734                                 my $pr = {
2735                                         path => $path,
2736                                         owner => to_utf8($owner),
2737                                 };
2738                                 push @list, $pr;
2739                                 (my $forks_path = $path) =~ s/\.git$//;
2740                                 $paths{$forks_path}++;
2741                         }
2742                 }
2743                 close $fd;
2744         }
2745         return @list;
2746 }
2747
2748 our $gitweb_project_owner = undef;
2749 sub git_get_project_list_from_file {
2750
2751         return if (defined $gitweb_project_owner);
2752
2753         $gitweb_project_owner = {};
2754         # read from file (url-encoded):
2755         # 'git%2Fgit.git Linus+Torvalds'
2756         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2757         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2758         if (-f $projects_list) {
2759                 open(my $fd, '<', $projects_list);
2760                 while (my $line = <$fd>) {
2761                         chomp $line;
2762                         my ($pr, $ow) = split ' ', $line;
2763                         $pr = unescape($pr);
2764                         $ow = unescape($ow);
2765                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2766                 }
2767                 close $fd;
2768         }
2769 }
2770
2771 sub git_get_project_owner {
2772         my $project = shift;
2773         my $owner;
2774
2775         return undef unless $project;
2776         $git_dir = "$projectroot/$project";
2777
2778         if (!defined $gitweb_project_owner) {
2779                 git_get_project_list_from_file();
2780         }
2781
2782         if (exists $gitweb_project_owner->{$project}) {
2783                 $owner = $gitweb_project_owner->{$project};
2784         }
2785         if (!defined $owner){
2786                 $owner = git_get_project_config('owner');
2787         }
2788         if (!defined $owner) {
2789                 $owner = get_file_owner("$git_dir");
2790         }
2791
2792         return $owner;
2793 }
2794
2795 sub git_get_last_activity {
2796         my ($path) = @_;
2797         my $fd;
2798
2799         $git_dir = "$projectroot/$path";
2800         open($fd, "-|", git_cmd(), 'for-each-ref',
2801              '--format=%(committer)',
2802              '--sort=-committerdate',
2803              '--count=1',
2804              'refs/heads') or return;
2805         my $most_recent = <$fd>;
2806         close $fd or return;
2807         if (defined $most_recent &&
2808             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2809                 my $timestamp = $1;
2810                 my $age = time - $timestamp;
2811                 return ($age, age_string($age));
2812         }
2813         return (undef, undef);
2814 }
2815
2816 # Implementation note: when a single remote is wanted, we cannot use 'git
2817 # remote show -n' because that command always work (assuming it's a remote URL
2818 # if it's not defined), and we cannot use 'git remote show' because that would
2819 # try to make a network roundtrip. So the only way to find if that particular
2820 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2821 # and when we find what we want.
2822 sub git_get_remotes_list {
2823         my $wanted = shift;
2824         my %remotes = ();
2825
2826         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2827         return unless $fd;
2828         while (my $remote = <$fd>) {
2829                 chomp $remote;
2830                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2831                 next if $wanted and not $remote eq $wanted;
2832                 my ($url, $key) = ($1, $2);
2833
2834                 $remotes{$remote} ||= { 'heads' => () };
2835                 $remotes{$remote}{$key} = $url;
2836         }
2837         close $fd or return;
2838         return wantarray ? %remotes : \%remotes;
2839 }
2840
2841 # Takes a hash of remotes as first parameter and fills it by adding the
2842 # available remote heads for each of the indicated remotes.
2843 sub fill_remote_heads {
2844         my $remotes = shift;
2845         my @heads = map { "remotes/$_" } keys %$remotes;
2846         my @remoteheads = git_get_heads_list(undef, @heads);
2847         foreach my $remote (keys %$remotes) {
2848                 $remotes->{$remote}{'heads'} = [ grep {
2849                         $_->{'name'} =~ s!^$remote/!!
2850                         } @remoteheads ];
2851         }
2852 }
2853
2854 sub git_get_references {
2855         my $type = shift || "";
2856         my %refs;
2857         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2858         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2859         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2860                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2861                 or return;
2862
2863         while (my $line = <$fd>) {
2864                 chomp $line;
2865                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2866                         if (defined $refs{$1}) {
2867                                 push @{$refs{$1}}, $2;
2868                         } else {
2869                                 $refs{$1} = [ $2 ];
2870                         }
2871                 }
2872         }
2873         close $fd or return;
2874         return \%refs;
2875 }
2876
2877 sub git_get_rev_name_tags {
2878         my $hash = shift || return undef;
2879
2880         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2881                 or return;
2882         my $name_rev = <$fd>;
2883         close $fd;
2884
2885         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2886                 return $1;
2887         } else {
2888                 # catches also '$hash undefined' output
2889                 return undef;
2890         }
2891 }
2892
2893 ## ----------------------------------------------------------------------
2894 ## parse to hash functions
2895
2896 sub parse_date {
2897         my $epoch = shift;
2898         my $tz = shift || "-0000";
2899
2900         my %date;
2901         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2902         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2903         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2904         $date{'hour'} = $hour;
2905         $date{'minute'} = $min;
2906         $date{'mday'} = $mday;
2907         $date{'day'} = $days[$wday];
2908         $date{'month'} = $months[$mon];
2909         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2910                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2911         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2912                              $mday, $months[$mon], $hour ,$min;
2913         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2914                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2915
2916         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2917         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2918         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2919         $date{'hour_local'} = $hour;
2920         $date{'minute_local'} = $min;
2921         $date{'tz_local'} = $tz;
2922         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2923                                   1900+$year, $mon+1, $mday,
2924                                   $hour, $min, $sec, $tz);
2925         return %date;
2926 }
2927
2928 sub parse_tag {
2929         my $tag_id = shift;
2930         my %tag;
2931         my @comment;
2932
2933         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2934         $tag{'id'} = $tag_id;
2935         while (my $line = <$fd>) {
2936                 chomp $line;
2937                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2938                         $tag{'object'} = $1;
2939                 } elsif ($line =~ m/^type (.+)$/) {
2940                         $tag{'type'} = $1;
2941                 } elsif ($line =~ m/^tag (.+)$/) {
2942                         $tag{'name'} = $1;
2943                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2944                         $tag{'author'} = $1;
2945                         $tag{'author_epoch'} = $2;
2946                         $tag{'author_tz'} = $3;
2947                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2948                                 $tag{'author_name'}  = $1;
2949                                 $tag{'author_email'} = $2;
2950                         } else {
2951                                 $tag{'author_name'} = $tag{'author'};
2952                         }
2953                 } elsif ($line =~ m/--BEGIN/) {
2954                         push @comment, $line;
2955                         last;
2956                 } elsif ($line eq "") {
2957                         last;
2958                 }
2959         }
2960         push @comment, <$fd>;
2961         $tag{'comment'} = \@comment;
2962         close $fd or return;
2963         if (!defined $tag{'name'}) {
2964                 return
2965         };
2966         return %tag
2967 }
2968
2969 sub parse_commit_text {
2970         my ($commit_text, $withparents) = @_;
2971         my @commit_lines = split '\n', $commit_text;
2972         my %co;
2973
2974         pop @commit_lines; # Remove '\0'
2975
2976         if (! @commit_lines) {
2977                 return;
2978         }
2979
2980         my $header = shift @commit_lines;
2981         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2982                 return;
2983         }
2984         ($co{'id'}, my @parents) = split ' ', $header;
2985         while (my $line = shift @commit_lines) {
2986                 last if $line eq "\n";
2987                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2988                         $co{'tree'} = $1;
2989                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2990                         push @parents, $1;
2991                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2992                         $co{'author'} = to_utf8($1);
2993                         $co{'author_epoch'} = $2;
2994                         $co{'author_tz'} = $3;
2995                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2996                                 $co{'author_name'}  = $1;
2997                                 $co{'author_email'} = $2;
2998                         } else {
2999                                 $co{'author_name'} = $co{'author'};
3000                         }
3001                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3002                         $co{'committer'} = to_utf8($1);
3003                         $co{'committer_epoch'} = $2;
3004                         $co{'committer_tz'} = $3;
3005                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3006                                 $co{'committer_name'}  = $1;
3007                                 $co{'committer_email'} = $2;
3008                         } else {
3009                                 $co{'committer_name'} = $co{'committer'};
3010                         }
3011                 }
3012         }
3013         if (!defined $co{'tree'}) {
3014                 return;
3015         };
3016         $co{'parents'} = \@parents;
3017         $co{'parent'} = $parents[0];
3018
3019         foreach my $title (@commit_lines) {
3020                 $title =~ s/^    //;
3021                 if ($title ne "") {
3022                         $co{'title'} = chop_str($title, 80, 5);
3023                         # remove leading stuff of merges to make the interesting part visible
3024                         if (length($title) > 50) {
3025                                 $title =~ s/^Automatic //;
3026                                 $title =~ s/^merge (of|with) /Merge ... /i;
3027                                 if (length($title) > 50) {
3028                                         $title =~ s/(http|rsync):\/\///;
3029                                 }
3030                                 if (length($title) > 50) {
3031                                         $title =~ s/(master|www|rsync)\.//;
3032                                 }
3033                                 if (length($title) > 50) {
3034                                         $title =~ s/kernel.org:?//;
3035                                 }
3036                                 if (length($title) > 50) {
3037                                         $title =~ s/\/pub\/scm//;
3038                                 }
3039                         }
3040                         $co{'title_short'} = chop_str($title, 50, 5);
3041                         last;
3042                 }
3043         }
3044         if (! defined $co{'title'} || $co{'title'} eq "") {
3045                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3046         }
3047         # remove added spaces
3048         foreach my $line (@commit_lines) {
3049                 $line =~ s/^    //;
3050         }
3051         $co{'comment'} = \@commit_lines;
3052
3053         my $age = time - $co{'committer_epoch'};
3054         $co{'age'} = $age;
3055         $co{'age_string'} = age_string($age);
3056         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3057         if ($age > 60*60*24*7*2) {
3058                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3059                 $co{'age_string_age'} = $co{'age_string'};
3060         } else {
3061                 $co{'age_string_date'} = $co{'age_string'};
3062                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3063         }
3064         return %co;
3065 }
3066
3067 sub parse_commit {
3068         my ($commit_id) = @_;
3069         my %co;
3070
3071         local $/ = "\0";
3072
3073         open my $fd, "-|", git_cmd(), "rev-list",
3074                 "--parents",
3075                 "--header",
3076                 "--max-count=1",
3077                 $commit_id,
3078                 "--",
3079                 or die_error(500, "Open git-rev-list failed");
3080         %co = parse_commit_text(<$fd>, 1);
3081         close $fd;
3082
3083         return %co;
3084 }
3085
3086 sub parse_commits {
3087         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3088         my @cos;
3089
3090         $maxcount ||= 1;
3091         $skip ||= 0;
3092
3093         local $/ = "\0";
3094
3095         open my $fd, "-|", git_cmd(), "rev-list",
3096                 "--header",
3097                 @args,
3098                 ("--max-count=" . $maxcount),
3099                 ("--skip=" . $skip),
3100                 @extra_options,
3101                 $commit_id,
3102                 "--",
3103                 ($filename ? ($filename) : ())
3104                 or die_error(500, "Open git-rev-list failed");
3105         while (my $line = <$fd>) {
3106                 my %co = parse_commit_text($line);
3107                 push @cos, \%co;
3108         }
3109         close $fd;
3110
3111         return wantarray ? @cos : \@cos;
3112 }
3113
3114 # parse line of git-diff-tree "raw" output
3115 sub parse_difftree_raw_line {
3116         my $line = shift;
3117         my %res;
3118
3119         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3120         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3121         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3122                 $res{'from_mode'} = $1;
3123                 $res{'to_mode'} = $2;
3124                 $res{'from_id'} = $3;
3125                 $res{'to_id'} = $4;
3126                 $res{'status'} = $5;
3127                 $res{'similarity'} = $6;
3128                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3129                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3130                 } else {
3131                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3132                 }
3133         }
3134         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3135         # combined diff (for merge commit)
3136         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3137                 $res{'nparents'}  = length($1);
3138                 $res{'from_mode'} = [ split(' ', $2) ];
3139                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3140                 $res{'from_id'} = [ split(' ', $3) ];
3141                 $res{'to_id'} = pop @{$res{'from_id'}};
3142                 $res{'status'} = [ split('', $4) ];
3143                 $res{'to_file'} = unquote($5);
3144         }
3145         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3146         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3147                 $res{'commit'} = $1;
3148         }
3149
3150         return wantarray ? %res : \%res;
3151 }
3152
3153 # wrapper: return parsed line of git-diff-tree "raw" output
3154 # (the argument might be raw line, or parsed info)
3155 sub parsed_difftree_line {
3156         my $line_or_ref = shift;
3157
3158         if (ref($line_or_ref) eq "HASH") {
3159                 # pre-parsed (or generated by hand)
3160                 return $line_or_ref;
3161         } else {
3162                 return parse_difftree_raw_line($line_or_ref);
3163         }
3164 }
3165
3166 # parse line of git-ls-tree output
3167 sub parse_ls_tree_line {
3168         my $line = shift;
3169         my %opts = @_;
3170         my %res;
3171
3172         if ($opts{'-l'}) {
3173                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3174                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3175
3176                 $res{'mode'} = $1;
3177                 $res{'type'} = $2;
3178                 $res{'hash'} = $3;
3179                 $res{'size'} = $4;
3180                 if ($opts{'-z'}) {
3181                         $res{'name'} = $5;
3182                 } else {
3183                         $res{'name'} = unquote($5);
3184                 }
3185         } else {
3186                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3187                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3188
3189                 $res{'mode'} = $1;
3190                 $res{'type'} = $2;
3191                 $res{'hash'} = $3;
3192                 if ($opts{'-z'}) {
3193                         $res{'name'} = $4;
3194                 } else {
3195                         $res{'name'} = unquote($4);
3196                 }
3197         }
3198
3199         return wantarray ? %res : \%res;
3200 }
3201
3202 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3203 sub parse_from_to_diffinfo {
3204         my ($diffinfo, $from, $to, @parents) = @_;
3205
3206         if ($diffinfo->{'nparents'}) {
3207                 # combined diff
3208                 $from->{'file'} = [];
3209                 $from->{'href'} = [];
3210                 fill_from_file_info($diffinfo, @parents)
3211                         unless exists $diffinfo->{'from_file'};
3212                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3213                         $from->{'file'}[$i] =
3214                                 defined $diffinfo->{'from_file'}[$i] ?
3215                                         $diffinfo->{'from_file'}[$i] :
3216                                         $diffinfo->{'to_file'};
3217                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3218                                 $from->{'href'}[$i] = href(action=>"blob",
3219                                                            hash_base=>$parents[$i],
3220                                                            hash=>$diffinfo->{'from_id'}[$i],
3221                                                            file_name=>$from->{'file'}[$i]);
3222                         } else {
3223                                 $from->{'href'}[$i] = undef;
3224                         }
3225                 }
3226         } else {
3227                 # ordinary (not combined) diff
3228                 $from->{'file'} = $diffinfo->{'from_file'};
3229                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3230                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3231                                                hash=>$diffinfo->{'from_id'},
3232                                                file_name=>$from->{'file'});
3233                 } else {
3234                         delete $from->{'href'};
3235                 }
3236         }
3237
3238         $to->{'file'} = $diffinfo->{'to_file'};
3239         if (!is_deleted($diffinfo)) { # file exists in result
3240                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3241                                      hash=>$diffinfo->{'to_id'},
3242                                      file_name=>$to->{'file'});
3243         } else {
3244                 delete $to->{'href'};
3245         }
3246 }
3247
3248 ## ......................................................................
3249 ## parse to array of hashes functions
3250
3251 sub git_get_heads_list {
3252         my ($limit, @classes) = @_;
3253         @classes = ('heads') unless @classes;
3254         my @patterns = map { "refs/$_" } @classes;
3255         my @headslist;
3256
3257         open my $fd, '-|', git_cmd(), 'for-each-ref',
3258                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3259                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3260                 @patterns
3261                 or return;
3262         while (my $line = <$fd>) {
3263                 my %ref_item;
3264
3265                 chomp $line;
3266                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3267                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3268                 my ($committer, $epoch, $tz) =
3269                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3270                 $ref_item{'fullname'}  = $name;
3271                 $name =~ s!^refs/(?:head|remote)s/!!;
3272
3273                 $ref_item{'name'}  = $name;
3274                 $ref_item{'id'}    = $hash;
3275                 $ref_item{'title'} = $title || '(no commit message)';
3276                 $ref_item{'epoch'} = $epoch;
3277                 if ($epoch) {
3278                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3279                 } else {
3280                         $ref_item{'age'} = "unknown";
3281                 }
3282
3283                 push @headslist, \%ref_item;
3284         }
3285         close $fd;
3286
3287         return wantarray ? @headslist : \@headslist;
3288 }
3289
3290 sub git_get_tags_list {
3291         my $limit = shift;
3292         my @tagslist;
3293
3294         open my $fd, '-|', git_cmd(), 'for-each-ref',
3295                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3296                 '--format=%(objectname) %(objecttype) %(refname) '.
3297                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3298                 'refs/tags'
3299                 or return;
3300         while (my $line = <$fd>) {
3301                 my %ref_item;
3302
3303                 chomp $line;
3304                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3305                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3306                 my ($creator, $epoch, $tz) =
3307                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3308                 $ref_item{'fullname'} = $name;
3309                 $name =~ s!^refs/tags/!!;
3310
3311                 $ref_item{'type'} = $type;
3312                 $ref_item{'id'} = $id;
3313                 $ref_item{'name'} = $name;
3314                 if ($type eq "tag") {
3315                         $ref_item{'subject'} = $title;
3316                         $ref_item{'reftype'} = $reftype;
3317                         $ref_item{'refid'}   = $refid;
3318                 } else {
3319                         $ref_item{'reftype'} = $type;
3320                         $ref_item{'refid'}   = $id;
3321                 }
3322
3323                 if ($type eq "tag" || $type eq "commit") {
3324                         $ref_item{'epoch'} = $epoch;
3325                         if ($epoch) {
3326                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3327                         } else {
3328                                 $ref_item{'age'} = "unknown";
3329                         }
3330                 }
3331
3332                 push @tagslist, \%ref_item;
3333         }
3334         close $fd;
3335
3336         return wantarray ? @tagslist : \@tagslist;
3337 }
3338
3339 ## ----------------------------------------------------------------------
3340 ## filesystem-related functions
3341
3342 sub get_file_owner {
3343         my $path = shift;
3344
3345         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3346         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3347         if (!defined $gcos) {
3348                 return undef;
3349         }
3350         my $owner = $gcos;
3351         $owner =~ s/[,;].*$//;
3352         return to_utf8($owner);
3353 }
3354
3355 # assume that file exists
3356 sub insert_file {
3357         my $filename = shift;
3358
3359         open my $fd, '<', $filename;
3360         print map { to_utf8($_) } <$fd>;
3361         close $fd;
3362 }
3363
3364 ## ......................................................................
3365 ## mimetype related functions
3366
3367 sub mimetype_guess_file {
3368         my $filename = shift;
3369         my $mimemap = shift;
3370         -r $mimemap or return undef;
3371
3372         my %mimemap;
3373         open(my $mh, '<', $mimemap) or return undef;
3374         while (<$mh>) {
3375                 next if m/^#/; # skip comments
3376                 my ($mimetype, $exts) = split(/\t+/);
3377                 if (defined $exts) {
3378                         my @exts = split(/\s+/, $exts);
3379                         foreach my $ext (@exts) {
3380                                 $mimemap{$ext} = $mimetype;
3381                         }
3382                 }
3383         }
3384         close($mh);
3385
3386         $filename =~ /\.([^.]*)$/;
3387         return $mimemap{$1};
3388 }
3389
3390 sub mimetype_guess {
3391         my $filename = shift;
3392         my $mime;
3393         $filename =~ /\./ or return undef;
3394
3395         if ($mimetypes_file) {
3396                 my $file = $mimetypes_file;
3397                 if ($file !~ m!^/!) { # if it is relative path
3398                         # it is relative to project
3399                         $file = "$projectroot/$project/$file";
3400                 }
3401                 $mime = mimetype_guess_file($filename, $file);
3402         }
3403         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3404         return $mime;
3405 }
3406
3407 sub blob_mimetype {
3408         my $fd = shift;
3409         my $filename = shift;
3410
3411         if ($filename) {
3412                 my $mime = mimetype_guess($filename);
3413                 $mime and return $mime;
3414         }
3415
3416         # just in case
3417         return $default_blob_plain_mimetype unless $fd;
3418
3419         if (-T $fd) {
3420                 return 'text/plain';
3421         } elsif (! $filename) {
3422                 return 'application/octet-stream';
3423         } elsif ($filename =~ m/\.png$/i) {
3424                 return 'image/png';
3425         } elsif ($filename =~ m/\.gif$/i) {
3426                 return 'image/gif';
3427         } elsif ($filename =~ m/\.jpe?g$/i) {
3428                 return 'image/jpeg';
3429         } else {
3430                 return 'application/octet-stream';
3431         }
3432 }
3433
3434 sub blob_contenttype {
3435         my ($fd, $file_name, $type) = @_;
3436
3437         $type ||= blob_mimetype($fd, $file_name);
3438         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3439                 $type .= "; charset=$default_text_plain_charset";
3440         }
3441
3442         return $type;
3443 }
3444
3445 # guess file syntax for syntax highlighting; return undef if no highlighting
3446 # the name of syntax can (in the future) depend on syntax highlighter used
3447 sub guess_file_syntax {
3448         my ($highlight, $mimetype, $file_name) = @_;
3449         return undef unless ($highlight && defined $file_name);
3450         my $basename = basename($file_name, '.in');
3451         return $highlight_basename{$basename}
3452                 if exists $highlight_basename{$basename};
3453
3454         $basename =~ /\.([^.]*)$/;
3455         my $ext = $1 or return undef;
3456         return $highlight_ext{$ext}
3457                 if exists $highlight_ext{$ext};
3458
3459         return undef;
3460 }
3461
3462 # run highlighter and return FD of its output,
3463 # or return original FD if no highlighting
3464 sub run_highlighter {
3465         my ($fd, $highlight, $syntax) = @_;
3466         return $fd unless ($highlight && defined $syntax);
3467
3468         close $fd;
3469         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3470                   quote_command($highlight_bin).
3471                   " --fragment --syntax $syntax |"
3472                 or die_error(500, "Couldn't open file or run syntax highlighter");
3473         return $fd;
3474 }
3475
3476 ## ======================================================================
3477 ## functions printing HTML: header, footer, error page
3478
3479 sub get_page_title {
3480         my $title = to_utf8($site_name);
3481
3482         return $title unless (defined $project);
3483         $title .= " - " . to_utf8($project);
3484
3485         return $title unless (defined $action);
3486         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3487
3488         return $title unless (defined $file_name);
3489         $title .= " - " . esc_path($file_name);
3490         if ($action eq "tree" && $file_name !~ m|/$|) {
3491                 $title .= "/";
3492         }
3493
3494         return $title;
3495 }
3496
3497 sub print_feed_meta {
3498         if (defined $project) {
3499                 my %href_params = get_feed_info();
3500                 if (!exists $href_params{'-title'}) {
3501                         $href_params{'-title'} = 'log';
3502                 }
3503
3504                 foreach my $format qw(RSS Atom) {
3505                         my $type = lc($format);
3506                         my %link_attr = (
3507                                 '-rel' => 'alternate',
3508                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3509                                 '-type' => "application/$type+xml"
3510                         );
3511
3512                         $href_params{'action'} = $type;
3513                         $link_attr{'-href'} = href(%href_params);
3514                         print "<link ".
3515                               "rel=\"$link_attr{'-rel'}\" ".
3516                               "title=\"$link_attr{'-title'}\" ".
3517                               "href=\"$link_attr{'-href'}\" ".
3518                               "type=\"$link_attr{'-type'}\" ".
3519                               "/>\n";
3520
3521                         $href_params{'extra_options'} = '--no-merges';
3522                         $link_attr{'-href'} = href(%href_params);
3523                         $link_attr{'-title'} .= ' (no merges)';
3524                         print "<link ".
3525                               "rel=\"$link_attr{'-rel'}\" ".
3526                               "title=\"$link_attr{'-title'}\" ".
3527                               "href=\"$link_attr{'-href'}\" ".
3528                               "type=\"$link_attr{'-type'}\" ".
3529                               "/>\n";
3530                 }
3531
3532         } else {
3533                 printf('<link rel="alternate" title="%s projects list" '.
3534                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3535                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3536                 printf('<link rel="alternate" title="%s projects feeds" '.
3537                        'href="%s" type="text/x-opml" />'."\n",
3538                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3539         }
3540 }
3541
3542 sub git_header_html {
3543         my $status = shift || "200 OK";
3544         my $expires = shift;
3545         my %opts = @_;
3546
3547         my $title = get_page_title();
3548         my $content_type;
3549         # require explicit support from the UA if we are to send the page as
3550         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3551         # we have to do this because MSIE sometimes globs '*/*', pretending to
3552         # support xhtml+xml but choking when it gets what it asked for.
3553         if (defined $cgi->http('HTTP_ACCEPT') &&
3554             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3555             $cgi->Accept('application/xhtml+xml') != 0) {
3556                 $content_type = 'application/xhtml+xml';
3557         } else {
3558                 $content_type = 'text/html';
3559         }
3560         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3561                            -status=> $status, -expires => $expires)
3562                 unless ($opts{'-no_http_header'});
3563         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3564         print <<EOF;
3565 <?xml version="1.0" encoding="utf-8"?>
3566 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3567 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3568 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3569 <!-- git core binaries version $git_version -->
3570 <head>
3571 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3572 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3573 <meta name="robots" content="index, nofollow"/>
3574 <title>$title</title>
3575 EOF
3576         # the stylesheet, favicon etc urls won't work correctly with path_info
3577         # unless we set the appropriate base URL
3578         if ($ENV{'PATH_INFO'}) {
3579                 print "<base href=\"".esc_url($base_url)."\" />\n";
3580         }
3581         # print out each stylesheet that exist, providing backwards capability
3582         # for those people who defined $stylesheet in a config file
3583         if (defined $stylesheet) {
3584                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3585         } else {
3586                 foreach my $stylesheet (@stylesheets) {
3587                         next unless $stylesheet;
3588                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3589                 }
3590         }
3591         print_feed_meta()
3592                 if ($status eq '200 OK');
3593         if (defined $favicon) {
3594                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3595         }
3596
3597         print "</head>\n" .
3598               "<body>\n";
3599
3600         if (defined $site_header && -f $site_header) {
3601                 insert_file($site_header);
3602         }
3603
3604         print "<div class=\"page_header\">\n";
3605         if (defined $logo) {
3606                 print $cgi->a({-href => esc_url($logo_url),
3607                                -title => $logo_label},
3608                               $cgi->img({-src => esc_url($logo),
3609                                          -width => 72, -height => 27,
3610                                          -alt => "git",
3611                                          -class => "logo"}));
3612         }
3613         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3614         if (defined $project) {
3615                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3616                 if (defined $action) {
3617                         my $action_print = $action ;
3618                         if (defined $opts{-action_extra}) {
3619                                 $action_print = $cgi->a({-href => href(action=>$action)},
3620                                         $action);
3621                         }
3622                         print " / $action_print";
3623                 }
3624                 if (defined $opts{-action_extra}) {
3625                         print " / $opts{-action_extra}";
3626                 }
3627                 print "\n";
3628         }
3629         print "</div>\n";
3630
3631         my $have_search = gitweb_check_feature('search');
3632         if (defined $project && $have_search) {
3633                 if (!defined $searchtext) {
3634                         $searchtext = "";
3635                 }
3636                 my $search_hash;
3637                 if (defined $hash_base) {
3638                         $search_hash = $hash_base;
3639                 } elsif (defined $hash) {
3640                         $search_hash = $hash;
3641                 } else {
3642                         $search_hash = "HEAD";
3643                 }
3644                 my $action = $my_uri;
3645                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3646                 if ($use_pathinfo) {
3647                         $action .= "/".esc_url($project);
3648                 }
3649                 print $cgi->startform(-method => "get", -action => $action) .
3650                       "<div class=\"search\">\n" .
3651                       (!$use_pathinfo &&
3652                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3653                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3654                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3655                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3656                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3657                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3658                       " search:\n",
3659                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3660                       "<span title=\"Extended regular expression\">" .
3661                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3662                                      -checked => $search_use_regexp) .
3663                       "</span>" .
3664                       "</div>" .
3665                       $cgi->end_form() . "\n";
3666         }
3667 }
3668
3669 sub git_footer_html {
3670         my $feed_class = 'rss_logo';
3671
3672         print "<div class=\"page_footer\">\n";
3673         if (defined $project) {
3674                 my $descr = git_get_project_description($project);
3675                 if (defined $descr) {
3676                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3677                 }
3678
3679                 my %href_params = get_feed_info();
3680                 if (!%href_params) {
3681                         $feed_class .= ' generic';
3682                 }
3683                 $href_params{'-title'} ||= 'log';
3684
3685                 foreach my $format qw(RSS Atom) {
3686                         $href_params{'action'} = lc($format);
3687                         print $cgi->a({-href => href(%href_params),
3688                                       -title => "$href_params{'-title'} $format feed",
3689                                       -class => $feed_class}, $format)."\n";
3690                 }
3691
3692         } else {
3693                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3694                               -class => $feed_class}, "OPML") . " ";
3695                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3696                               -class => $feed_class}, "TXT") . "\n";
3697         }
3698         print "</div>\n"; # class="page_footer"
3699
3700         if (defined $t0 && gitweb_check_feature('timed')) {
3701                 print "<div id=\"generating_info\">\n";
3702                 print 'This page took '.
3703                       '<span id="generating_time" class="time_span">'.
3704                       tv_interval($t0, [ gettimeofday() ]).
3705                       ' seconds </span>'.
3706                       ' and '.
3707                       '<span id="generating_cmd">'.
3708                       $number_of_git_cmds.
3709                       '</span> git commands '.
3710                       " to generate.\n";
3711                 print "</div>\n"; # class="page_footer"
3712         }
3713
3714         if (defined $site_footer && -f $site_footer) {
3715                 insert_file($site_footer);
3716         }
3717
3718         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3719         if (defined $action &&
3720             $action eq 'blame_incremental') {
3721                 print qq!<script type="text/javascript">\n!.
3722                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3723                       qq!           "!. href() .qq!");\n!.
3724                       qq!</script>\n!;
3725         } elsif (gitweb_check_feature('javascript-actions')) {
3726                 print qq!<script type="text/javascript">\n!.
3727                       qq!window.onload = fixLinks;\n!.
3728                       qq!</script>\n!;
3729         }
3730
3731         print "</body>\n" .
3732               "</html>";
3733 }
3734
3735 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3736 # Example: die_error(404, 'Hash not found')
3737 # By convention, use the following status codes (as defined in RFC 2616):
3738 # 400: Invalid or missing CGI parameters, or
3739 #      requested object exists but has wrong type.
3740 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3741 #      this server or project.
3742 # 404: Requested object/revision/project doesn't exist.
3743 # 500: The server isn't configured properly, or
3744 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3745 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3746 # 503: The server is currently unavailable (because it is overloaded,
3747 #      or down for maintenance).  Generally, this is a temporary state.
3748 sub die_error {
3749         my $status = shift || 500;
3750         my $error = esc_html(shift) || "Internal Server Error";
3751         my $extra = shift;
3752         my %opts = @_;
3753
3754         my %http_responses = (
3755                 400 => '400 Bad Request',
3756                 403 => '403 Forbidden',
3757                 404 => '404 Not Found',
3758                 500 => '500 Internal Server Error',
3759                 503 => '503 Service Unavailable',
3760         );
3761         git_header_html($http_responses{$status}, undef, %opts);
3762         print <<EOF;
3763 <div class="page_body">
3764 <br /><br />
3765 $status - $error
3766 <br />
3767 EOF
3768         if (defined $extra) {
3769                 print "<hr />\n" .
3770                       "$extra\n";
3771         }
3772         print "</div>\n";
3773
3774         git_footer_html();
3775         goto DONE_GITWEB
3776                 unless ($opts{'-error_handler'});
3777 }
3778
3779 ## ----------------------------------------------------------------------
3780 ## functions printing or outputting HTML: navigation
3781
3782 sub git_print_page_nav {
3783         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3784         $extra = '' if !defined $extra; # pager or formats
3785
3786         my @navs = qw(summary shortlog log commit commitdiff tree);
3787         if ($suppress) {
3788                 @navs = grep { $_ ne $suppress } @navs;
3789         }
3790
3791         my %arg = map { $_ => {action=>$_} } @navs;
3792         if (defined $head) {
3793                 for (qw(commit commitdiff)) {
3794                         $arg{$_}{'hash'} = $head;
3795                 }
3796                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3797                         for (qw(shortlog log)) {
3798                                 $arg{$_}{'hash'} = $head;
3799                         }
3800                 }
3801         }
3802
3803         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3804         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3805
3806         my @actions = gitweb_get_feature('actions');
3807         my %repl = (
3808                 '%' => '%',
3809                 'n' => $project,         # project name
3810                 'f' => $git_dir,         # project path within filesystem
3811                 'h' => $treehead || '',  # current hash ('h' parameter)
3812                 'b' => $treebase || '',  # hash base ('hb' parameter)
3813         );
3814         while (@actions) {
3815                 my ($label, $link, $pos) = splice(@actions,0,3);
3816                 # insert
3817                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3818                 # munch munch
3819                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3820                 $arg{$label}{'_href'} = $link;
3821         }
3822
3823         print "<div class=\"page_nav\">\n" .
3824                 (join " | ",
3825                  map { $_ eq $current ?
3826                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3827                  } @navs);
3828         print "<br/>\n$extra<br/>\n" .
3829               "</div>\n";
3830 }
3831
3832 # returns a submenu for the nagivation of the refs views (tags, heads,
3833 # remotes) with the current view disabled and the remotes view only
3834 # available if the feature is enabled
3835 sub format_ref_views {
3836         my ($current) = @_;
3837         my @ref_views = qw{tags heads};
3838         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3839         return join " | ", map {
3840                 $_ eq $current ? $_ :
3841                 $cgi->a({-href => href(action=>$_)}, $_)
3842         } @ref_views
3843 }
3844
3845 sub format_paging_nav {
3846         my ($action, $page, $has_next_link) = @_;
3847         my $paging_nav;
3848
3849
3850         if ($page > 0) {
3851                 $paging_nav .=
3852                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3853                         " &sdot; " .
3854                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3855                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3856         } else {
3857                 $paging_nav .= "first &sdot; prev";
3858         }
3859
3860         if ($has_next_link) {
3861                 $paging_nav .= " &sdot; " .
3862                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3863                                  -accesskey => "n", -title => "Alt-n"}, "next");
3864         } else {
3865                 $paging_nav .= " &sdot; next";
3866         }
3867
3868         return $paging_nav;
3869 }
3870
3871 ## ......................................................................
3872 ## functions printing or outputting HTML: div
3873
3874 sub git_print_header_div {
3875         my ($action, $title, $hash, $hash_base) = @_;
3876         my %args = ();
3877
3878         $args{'action'} = $action;
3879         $args{'hash'} = $hash if $hash;
3880         $args{'hash_base'} = $hash_base if $hash_base;
3881
3882         print "<div class=\"header\">\n" .
3883               $cgi->a({-href => href(%args), -class => "title"},
3884               $title ? $title : $action) .
3885               "\n</div>\n";
3886 }
3887
3888 sub format_repo_url {
3889         my ($name, $url) = @_;
3890         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3891 }
3892
3893 # Group output by placing it in a DIV element and adding a header.
3894 # Options for start_div() can be provided by passing a hash reference as the
3895 # first parameter to the function.
3896 # Options to git_print_header_div() can be provided by passing an array
3897 # reference. This must follow the options to start_div if they are present.
3898 # The content can be a scalar, which is output as-is, a scalar reference, which
3899 # is output after html escaping, an IO handle passed either as *handle or
3900 # *handle{IO}, or a function reference. In the latter case all following
3901 # parameters will be taken as argument to the content function call.
3902 sub git_print_section {
3903         my ($div_args, $header_args, $content);
3904         my $arg = shift;
3905         if (ref($arg) eq 'HASH') {
3906                 $div_args = $arg;
3907                 $arg = shift;
3908         }
3909         if (ref($arg) eq 'ARRAY') {
3910                 $header_args = $arg;
3911                 $arg = shift;
3912         }
3913         $content = $arg;
3914
3915         print $cgi->start_div($div_args);
3916         git_print_header_div(@$header_args);
3917
3918         if (ref($content) eq 'CODE') {
3919                 $content->(@_);
3920         } elsif (ref($content) eq 'SCALAR') {
3921                 print esc_html($$content);
3922         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3923                 print <$content>;
3924         } elsif (!ref($content) && defined($content)) {
3925                 print $content;
3926         }
3927
3928         print $cgi->end_div;
3929 }
3930
3931 sub print_local_time {
3932         print format_local_time(@_);
3933 }
3934
3935 sub format_local_time {
3936         my $localtime = '';
3937         my %date = @_;
3938         if ($date{'hour_local'} < 6) {
3939                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3940                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3941         } else {
3942                 $localtime .= sprintf(" (%02d:%02d %s)",
3943                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3944         }
3945
3946         return $localtime;
3947 }
3948
3949 # Outputs the author name and date in long form
3950 sub git_print_authorship {
3951         my $co = shift;
3952         my %opts = @_;
3953         my $tag = $opts{-tag} || 'div';
3954         my $author = $co->{'author_name'};
3955
3956         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3957         print "<$tag class=\"author_date\">" .
3958               format_search_author($author, "author", esc_html($author)) .
3959               " [$ad{'rfc2822'}";
3960         print_local_time(%ad) if ($opts{-localtime});
3961         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3962                   . "</$tag>\n";
3963 }
3964
3965 # Outputs table rows containing the full author or committer information,
3966 # in the format expected for 'commit' view (& similar).
3967 # Parameters are a commit hash reference, followed by the list of people
3968 # to output information for. If the list is empty it defaults to both
3969 # author and committer.
3970 sub git_print_authorship_rows {
3971         my $co = shift;
3972         # too bad we can't use @people = @_ || ('author', 'committer')
3973         my @people = @_;
3974         @people = ('author', 'committer') unless @people;
3975         foreach my $who (@people) {
3976                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3977                 print "<tr><td>$who</td><td>" .
3978                       format_search_author($co->{"${who}_name"}, $who,
3979                                esc_html($co->{"${who}_name"})) . " " .
3980                       format_search_author($co->{"${who}_email"}, $who,
3981                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3982                       "</td><td rowspan=\"2\">" .
3983                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3984                       "</td></tr>\n" .
3985                       "<tr>" .
3986                       "<td></td><td> $wd{'rfc2822'}";
3987                 print_local_time(%wd);
3988                 print "</td>" .
3989                       "</tr>\n";
3990         }
3991 }
3992
3993 sub git_print_page_path {
3994         my $name = shift;
3995         my $type = shift;
3996         my $hb = shift;
3997
3998
3999         print "<div class=\"page_path\">";
4000         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4001                       -title => 'tree root'}, to_utf8("[$project]"));
4002         print " / ";
4003         if (defined $name) {
4004                 my @dirname = split '/', $name;
4005                 my $basename = pop @dirname;
4006                 my $fullname = '';
4007
4008                 foreach my $dir (@dirname) {
4009                         $fullname .= ($fullname ? '/' : '') . $dir;
4010                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4011                                                      hash_base=>$hb),
4012                                       -title => $fullname}, esc_path($dir));
4013                         print " / ";
4014                 }
4015                 if (defined $type && $type eq 'blob') {
4016                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4017                                                      hash_base=>$hb),
4018                                       -title => $name}, esc_path($basename));
4019                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4020 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4021 <script>
4022 function toggleLineNumbers() {
4023         e = document.getElementById("lineNoStyle");
4024         e2 = document.getElementById("lineNoToggle");
4025         if (e2.innerHTML == "[Hide line numbers]") {
4026                 e.innerHTML = ".linenr { display:none; }";
4027                 e2.innerHTML = "[Show line numbers]";
4028         }
4029         else {
4030                 e.innerHTML = "";
4031                 e2.innerHTML = "[Hide line numbers]";
4032         }
4033 }
4034 var style = document.createElement("style");
4035 style.setAttribute("id", "lineNoStyle");
4036 document.getElementsByTagName("head")[0].appendChild(style);
4037 toggleLineNumbers();
4038 </script>
4039 ';
4040                 } elsif (defined $type && $type eq 'tree') {
4041                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4042                                                      hash_base=>$hb),
4043                                       -title => $name}, esc_path($basename));
4044                         print " / ";
4045                 } else {
4046                         print esc_path($basename);
4047                 }
4048         }
4049         print "<br/></div>\n";
4050 }
4051
4052 sub git_print_log {
4053         my $log = shift;
4054         my %opts = @_;
4055
4056         if ($opts{'-remove_title'}) {
4057                 # remove title, i.e. first line of log
4058                 shift @$log;
4059         }
4060         # remove leading empty lines
4061         while (defined $log->[0] && $log->[0] eq "") {
4062                 shift @$log;
4063         }
4064
4065         # print log
4066         my $signoff = 0;
4067         my $empty = 0;
4068         foreach my $line (@$log) {
4069                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4070                         $signoff = 1;
4071                         $empty = 0;
4072                         if (! $opts{'-remove_signoff'}) {
4073                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4074                                 next;
4075                         } else {
4076                                 # remove signoff lines
4077                                 next;
4078                         }
4079                 } else {
4080                         $signoff = 0;
4081                 }
4082
4083                 # print only one empty line
4084                 # do not print empty line after signoff
4085                 if ($line eq "") {
4086                         next if ($empty || $signoff);
4087                         $empty = 1;
4088                 } else {
4089                         $empty = 0;
4090                 }
4091
4092                 print format_log_line_html($line) . "<br/>\n";
4093         }
4094
4095         if ($opts{'-final_empty_line'}) {
4096                 # end with single empty line
4097                 print "<br/>\n" unless $empty;
4098         }
4099 }
4100
4101 # return link target (what link points to)
4102 sub git_get_link_target {
4103         my $hash = shift;
4104         my $link_target;
4105
4106         # read link
4107         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4108                 or return;
4109         {
4110                 local $/ = undef;
4111                 $link_target = <$fd>;
4112         }
4113         close $fd
4114                 or return;
4115
4116         return $link_target;
4117 }
4118
4119 # given link target, and the directory (basedir) the link is in,
4120 # return target of link relative to top directory (top tree);
4121 # return undef if it is not possible (including absolute links).
4122 sub normalize_link_target {
4123         my ($link_target, $basedir) = @_;
4124
4125         # absolute symlinks (beginning with '/') cannot be normalized
4126         return if (substr($link_target, 0, 1) eq '/');
4127
4128         # normalize link target to path from top (root) tree (dir)
4129         my $path;
4130         if ($basedir) {
4131                 $path = $basedir . '/' . $link_target;
4132         } else {
4133                 # we are in top (root) tree (dir)
4134                 $path = $link_target;
4135         }
4136
4137         # remove //, /./, and /../
4138         my @path_parts;
4139         foreach my $part (split('/', $path)) {
4140                 # discard '.' and ''
4141                 next if (!$part || $part eq '.');
4142                 # handle '..'
4143                 if ($part eq '..') {
4144                         if (@path_parts) {
4145                                 pop @path_parts;
4146                         } else {
4147                                 # link leads outside repository (outside top dir)
4148                                 return;
4149                         }
4150                 } else {
4151                         push @path_parts, $part;
4152                 }
4153         }
4154         $path = join('/', @path_parts);
4155
4156         return $path;
4157 }
4158
4159 # print tree entry (row of git_tree), but without encompassing <tr> element
4160 sub git_print_tree_entry {
4161         my ($t, $basedir, $hash_base, $have_blame) = @_;
4162
4163         my %base_key = ();
4164         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4165
4166         # The format of a table row is: mode list link.  Where mode is
4167         # the mode of the entry, list is the name of the entry, an href,
4168         # and link is the action links of the entry.
4169
4170         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4171         if (exists $t->{'size'}) {
4172                 print "<td class=\"size\">$t->{'size'}</td>\n";
4173         }
4174         if ($t->{'type'} eq "blob") {
4175                 print "<td class=\"list\">" .
4176                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4177                                                file_name=>"$basedir$t->{'name'}", %base_key),
4178                                 -class => "list"}, esc_path($t->{'name'}));
4179                 if (S_ISLNK(oct $t->{'mode'})) {
4180                         my $link_target = git_get_link_target($t->{'hash'});
4181                         if ($link_target) {
4182                                 my $norm_target = normalize_link_target($link_target, $basedir);
4183                                 if (defined $norm_target) {
4184                                         print " -> " .
4185                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4186                                                                      file_name=>$norm_target),
4187                                                        -title => $norm_target}, esc_path($link_target));
4188                                 } else {
4189                                         print " -> " . esc_path($link_target);
4190                                 }
4191                         }
4192                 }
4193                 print "</td>\n";
4194                 print "<td class=\"link\">";
4195                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4196                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4197                               "blob");
4198                 if ($have_blame) {
4199                         print " | " .
4200                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4201                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4202                                       "blame");
4203                 }
4204                 if (defined $hash_base) {
4205                         print " | " .
4206                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4207                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4208                                       "history");
4209                 }
4210                 print " | " .
4211                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4212                                                file_name=>"$basedir$t->{'name'}")},
4213                                 "raw");
4214                 print "</td>\n";
4215
4216         } elsif ($t->{'type'} eq "tree") {
4217                 print "<td class=\"list\">";
4218                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4219                                              file_name=>"$basedir$t->{'name'}",
4220                                              %base_key)},
4221                               esc_path($t->{'name'}));
4222                 print "</td>\n";
4223                 print "<td class=\"link\">";
4224                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4225                                              file_name=>"$basedir$t->{'name'}",
4226                                              %base_key)},
4227                               "tree");
4228                 if (defined $hash_base) {
4229                         print " | " .
4230                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4231                                                      file_name=>"$basedir$t->{'name'}")},
4232                                       "history");
4233                 }
4234                 print "</td>\n";
4235         } else {
4236                 # unknown object: we can only present history for it
4237                 # (this includes 'commit' object, i.e. submodule support)
4238                 print "<td class=\"list\">" .
4239                       esc_path($t->{'name'}) .
4240                       "</td>\n";
4241                 print "<td class=\"link\">";
4242                 if (defined $hash_base) {
4243                         print $cgi->a({-href => href(action=>"history",
4244                                                      hash_base=>$hash_base,
4245                                                      file_name=>"$basedir$t->{'name'}")},
4246                                       "history");
4247                 }
4248                 print "</td>\n";
4249         }
4250 }
4251
4252 ## ......................................................................
4253 ## functions printing large fragments of HTML
4254
4255 # get pre-image filenames for merge (combined) diff
4256 sub fill_from_file_info {
4257         my ($diff, @parents) = @_;
4258
4259         $diff->{'from_file'} = [ ];
4260         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4261         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4262                 if ($diff->{'status'}[$i] eq 'R' ||
4263                     $diff->{'status'}[$i] eq 'C') {
4264                         $diff->{'from_file'}[$i] =
4265                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4266                 }
4267         }
4268
4269         return $diff;
4270 }
4271
4272 # is current raw difftree line of file deletion
4273 sub is_deleted {
4274         my $diffinfo = shift;
4275
4276         return $diffinfo->{'to_id'} eq ('0' x 40);
4277 }
4278
4279 # does patch correspond to [previous] difftree raw line
4280 # $diffinfo  - hashref of parsed raw diff format
4281 # $patchinfo - hashref of parsed patch diff format
4282 #              (the same keys as in $diffinfo)
4283 sub is_patch_split {
4284         my ($diffinfo, $patchinfo) = @_;
4285
4286         return defined $diffinfo && defined $patchinfo
4287                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4288 }
4289
4290
4291 sub git_difftree_body {
4292         my ($difftree, $hash, @parents) = @_;
4293         my ($parent) = $parents[0];
4294         my $have_blame = gitweb_check_feature('blame');
4295         print "<div class=\"list_head\">\n";
4296         if ($#{$difftree} > 10) {
4297                 print(($#{$difftree} + 1) . " files changed:\n");
4298         }
4299         print "</div>\n";
4300
4301         print "<table class=\"" .
4302               (@parents > 1 ? "combined " : "") .
4303               "diff_tree\">\n";
4304
4305         # header only for combined diff in 'commitdiff' view
4306         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4307         if ($has_header) {
4308                 # table header
4309                 print "<thead><tr>\n" .
4310                        "<th></th><th></th>\n"; # filename, patchN link
4311                 for (my $i = 0; $i < @parents; $i++) {
4312                         my $par = $parents[$i];
4313                         print "<th>" .
4314                               $cgi->a({-href => href(action=>"commitdiff",
4315                                                      hash=>$hash, hash_parent=>$par),
4316                                        -title => 'commitdiff to parent number ' .
4317                                                   ($i+1) . ': ' . substr($par,0,7)},
4318                                       $i+1) .
4319                               "&nbsp;</th>\n";
4320                 }
4321                 print "</tr></thead>\n<tbody>\n";
4322         }
4323
4324         my $alternate = 1;
4325         my $patchno = 0;
4326         foreach my $line (@{$difftree}) {
4327                 my $diff = parsed_difftree_line($line);
4328
4329                 if ($alternate) {
4330                         print "<tr class=\"dark\">\n";
4331                 } else {
4332                         print "<tr class=\"light\">\n";
4333                 }
4334                 $alternate ^= 1;
4335
4336                 if (exists $diff->{'nparents'}) { # combined diff
4337
4338                         fill_from_file_info($diff, @parents)
4339                                 unless exists $diff->{'from_file'};
4340
4341                         if (!is_deleted($diff)) {
4342                                 # file exists in the result (child) commit
4343                                 print "<td>" .
4344                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4345                                                              file_name=>$diff->{'to_file'},
4346                                                              hash_base=>$hash),
4347                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4348                                       "</td>\n";
4349                         } else {
4350                                 print "<td>" .
4351                                       esc_path($diff->{'to_file'}) .
4352                                       "</td>\n";
4353                         }
4354
4355                         if ($action eq 'commitdiff') {
4356                                 # link to patch
4357                                 $patchno++;
4358                                 print "<td class=\"link\">" .
4359                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4360                                       " | " .
4361                                       "</td>\n";
4362                         }
4363
4364                         my $has_history = 0;
4365                         my $not_deleted = 0;
4366                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4367                                 my $hash_parent = $parents[$i];
4368                                 my $from_hash = $diff->{'from_id'}[$i];
4369                                 my $from_path = $diff->{'from_file'}[$i];
4370                                 my $status = $diff->{'status'}[$i];
4371
4372                                 $has_history ||= ($status ne 'A');
4373                                 $not_deleted ||= ($status ne 'D');
4374
4375                                 if ($status eq 'A') {
4376                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4377                                 } elsif ($status eq 'D') {
4378                                         print "<td class=\"link\">" .
4379                                               $cgi->a({-href => href(action=>"blob",
4380                                                                      hash_base=>$hash,
4381                                                                      hash=>$from_hash,
4382                                                                      file_name=>$from_path)},
4383                                                       "blob" . ($i+1)) .
4384                                               " | </td>\n";
4385                                 } else {
4386                                         if ($diff->{'to_id'} eq $from_hash) {
4387                                                 print "<td class=\"link nochange\">";
4388                                         } else {
4389                                                 print "<td class=\"link\">";
4390                                         }
4391                                         print $cgi->a({-href => href(action=>"blobdiff",
4392                                                                      hash=>$diff->{'to_id'},
4393                                                                      hash_parent=>$from_hash,
4394                                                                      hash_base=>$hash,
4395                                                                      hash_parent_base=>$hash_parent,
4396                                                                      file_name=>$diff->{'to_file'},
4397                                                                      file_parent=>$from_path)},
4398                                                       "diff" . ($i+1)) .
4399                                               " | </td>\n";
4400                                 }
4401                         }
4402
4403                         print "<td class=\"link\">";
4404                         if ($not_deleted) {
4405                                 print $cgi->a({-href => href(action=>"blob",
4406                                                              hash=>$diff->{'to_id'},
4407                                                              file_name=>$diff->{'to_file'},
4408                                                              hash_base=>$hash)},
4409                                               "blob");
4410                                 print " | " if ($has_history);
4411                         }
4412                         if ($has_history) {
4413                                 print $cgi->a({-href => href(action=>"history",
4414                                                              file_name=>$diff->{'to_file'},
4415                                                              hash_base=>$hash)},
4416                                               "history");
4417                         }
4418                         print "</td>\n";
4419
4420                         print "</tr>\n";
4421                         next; # instead of 'else' clause, to avoid extra indent
4422                 }
4423                 # else ordinary diff
4424
4425                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4426                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4427                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4428                         $to_mode_oct = oct $diff->{'to_mode'};
4429                         if (S_ISREG($to_mode_oct)) { # only for regular file
4430                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4431                         }
4432                         $to_file_type = file_type($diff->{'to_mode'});
4433                 }
4434                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4435                         $from_mode_oct = oct $diff->{'from_mode'};
4436                         if (S_ISREG($to_mode_oct)) { # only for regular file
4437                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4438                         }
4439                         $from_file_type = file_type($diff->{'from_mode'});
4440                 }
4441
4442                 if ($diff->{'status'} eq "A") { # created
4443                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4444                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4445                         $mode_chng   .= "]</span>";
4446                         print "<td>";
4447                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4448                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4449                                       -class => "list"}, esc_path($diff->{'file'}));
4450                         print "</td>\n";
4451                         print "<td>$mode_chng</td>\n";
4452                         print "<td class=\"link\">";
4453                         if ($action eq 'commitdiff') {
4454                                 # link to patch
4455                                 $patchno++;
4456                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4457                                 print " | ";
4458                         }
4459                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4460                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4461                                       "blob");
4462                         print "</td>\n";
4463
4464                 } elsif ($diff->{'status'} eq "D") { # deleted
4465                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4466                         print "<td>";
4467                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4468                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4469                                        -class => "list"}, esc_path($diff->{'file'}));
4470                         print "</td>\n";
4471                         print "<td>$mode_chng</td>\n";
4472                         print "<td class=\"link\">";
4473                         if ($action eq 'commitdiff') {
4474                                 # link to patch
4475                                 $patchno++;
4476                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4477                                 print " | ";
4478                         }
4479                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4480                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4481                                       "blob") . " | ";
4482                         if ($have_blame) {
4483                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4484                                                              file_name=>$diff->{'file'})},
4485                                               "blame") . " | ";
4486                         }
4487                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4488                                                      file_name=>$diff->{'file'})},
4489                                       "history");
4490                         print "</td>\n";
4491
4492                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4493                         my $mode_chnge = "";
4494                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4495                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4496                                 if ($from_file_type ne $to_file_type) {
4497                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4498                                 }
4499                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4500                                         if ($from_mode_str && $to_mode_str) {
4501                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4502                                         } elsif ($to_mode_str) {
4503                                                 $mode_chnge .= " mode: $to_mode_str";
4504                                         }
4505                                 }
4506                                 $mode_chnge .= "]</span>\n";
4507                         }
4508                         print "<td>";
4509                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4510                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4511                                       -class => "list"}, esc_path($diff->{'file'}));
4512                         print "</td>\n";
4513                         print "<td>$mode_chnge</td>\n";
4514                         print "<td class=\"link\">";
4515                         if ($action eq 'commitdiff') {
4516                                 # link to patch
4517                                 $patchno++;
4518                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4519                                       " | ";
4520                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4521                                 # "commit" view and modified file (not onlu mode changed)
4522                                 print $cgi->a({-href => href(action=>"blobdiff",
4523                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4524                                                              hash_base=>$hash, hash_parent_base=>$parent,
4525                                                              file_name=>$diff->{'file'})},
4526                                               "diff") .
4527                                       " | ";
4528                         }
4529                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4530                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4531                                        "blob") . " | ";
4532                         if ($have_blame) {
4533                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4534                                                              file_name=>$diff->{'file'})},
4535                                               "blame") . " | ";
4536                         }
4537                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4538                                                      file_name=>$diff->{'file'})},
4539                                       "history");
4540                         print "</td>\n";
4541
4542                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4543                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4544                         my $nstatus = $status_name{$diff->{'status'}};
4545                         my $mode_chng = "";
4546                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4547                                 # mode also for directories, so we cannot use $to_mode_str
4548                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4549                         }
4550                         print "<td>" .
4551                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4552                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4553                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4554                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4555                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4556                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4557                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4558                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4559                               "<td class=\"link\">";
4560                         if ($action eq 'commitdiff') {
4561                                 # link to patch
4562                                 $patchno++;
4563                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4564                                       " | ";
4565                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4566                                 # "commit" view and modified file (not only pure rename or copy)
4567                                 print $cgi->a({-href => href(action=>"blobdiff",
4568                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4569                                                              hash_base=>$hash, hash_parent_base=>$parent,
4570                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4571                                               "diff") .
4572                                       " | ";
4573                         }
4574                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4575                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4576                                       "blob") . " | ";
4577                         if ($have_blame) {
4578                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4579                                                              file_name=>$diff->{'to_file'})},
4580                                               "blame") . " | ";
4581                         }
4582                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4583                                                     file_name=>$diff->{'to_file'})},
4584                                       "history");
4585                         print "</td>\n";
4586
4587                 } # we should not encounter Unmerged (U) or Unknown (X) status
4588                 print "</tr>\n";
4589         }
4590         print "</tbody>" if $has_header;
4591         print "</table>\n";
4592 }
4593
4594 sub git_patchset_body {
4595         my ($fd, $difftree, $hash, @hash_parents) = @_;
4596         my ($hash_parent) = $hash_parents[0];
4597
4598         my $is_combined = (@hash_parents > 1);
4599         my $patch_idx = 0;
4600         my $patch_number = 0;
4601         my $patch_line;
4602         my $diffinfo;
4603         my $to_name;
4604         my (%from, %to);
4605
4606         print "<div class=\"patchset\">\n";
4607
4608         # skip to first patch
4609         while ($patch_line = <$fd>) {
4610                 chomp $patch_line;
4611
4612                 last if ($patch_line =~ m/^diff /);
4613         }
4614
4615  PATCH:
4616         while ($patch_line) {
4617
4618                 # parse "git diff" header line
4619                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4620                         # $1 is from_name, which we do not use
4621                         $to_name = unquote($2);
4622                         $to_name =~ s!^b/!!;
4623                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4624                         # $1 is 'cc' or 'combined', which we do not use
4625                         $to_name = unquote($2);
4626                 } else {
4627                         $to_name = undef;
4628                 }
4629
4630                 # check if current patch belong to current raw line
4631                 # and parse raw git-diff line if needed
4632                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4633                         # this is continuation of a split patch
4634                         print "<div class=\"patch cont\">\n";
4635                 } else {
4636                         # advance raw git-diff output if needed
4637                         $patch_idx++ if defined $diffinfo;
4638
4639                         # read and prepare patch information
4640                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4641
4642                         # compact combined diff output can have some patches skipped
4643                         # find which patch (using pathname of result) we are at now;
4644                         if ($is_combined) {
4645                                 while ($to_name ne $diffinfo->{'to_file'}) {
4646                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4647                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4648                                               "</div>\n";  # class="patch"
4649
4650                                         $patch_idx++;
4651                                         $patch_number++;
4652
4653                                         last if $patch_idx > $#$difftree;
4654                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4655                                 }
4656                         }
4657
4658                         # modifies %from, %to hashes
4659                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4660
4661                         # this is first patch for raw difftree line with $patch_idx index
4662                         # we index @$difftree array from 0, but number patches from 1
4663                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4664                 }
4665
4666                 # git diff header
4667                 #assert($patch_line =~ m/^diff /) if DEBUG;
4668                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4669                 $patch_number++;
4670                 # print "git diff" header
4671                 print format_git_diff_header_line($patch_line, $diffinfo,
4672                                                   \%from, \%to);
4673
4674                 # print extended diff header
4675                 print "<div class=\"diff extended_header\">\n";
4676         EXTENDED_HEADER:
4677                 while ($patch_line = <$fd>) {
4678                         chomp $patch_line;
4679
4680                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4681
4682                         print format_extended_diff_header_line($patch_line, $diffinfo,
4683                                                                \%from, \%to);
4684                 }
4685                 print "</div>\n"; # class="diff extended_header"
4686
4687                 # from-file/to-file diff header
4688                 if (! $patch_line) {
4689                         print "</div>\n"; # class="patch"
4690                         last PATCH;
4691                 }
4692                 next PATCH if ($patch_line =~ m/^diff /);
4693                 #assert($patch_line =~ m/^---/) if DEBUG;
4694
4695                 my $last_patch_line = $patch_line;
4696                 $patch_line = <$fd>;
4697                 chomp $patch_line;
4698                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4699
4700                 print format_diff_from_to_header($last_patch_line, $patch_line,
4701                                                  $diffinfo, \%from, \%to,
4702                                                  @hash_parents);
4703
4704                 # the patch itself
4705         LINE:
4706                 while ($patch_line = <$fd>) {
4707                         chomp $patch_line;
4708
4709                         next PATCH if ($patch_line =~ m/^diff /);
4710
4711                         print format_diff_line($patch_line, \%from, \%to);
4712                 }
4713
4714         } continue {
4715                 print "</div>\n"; # class="patch"
4716         }
4717
4718         # for compact combined (--cc) format, with chunk and patch simplification
4719         # the patchset might be empty, but there might be unprocessed raw lines
4720         for (++$patch_idx if $patch_number > 0;
4721              $patch_idx < @$difftree;
4722              ++$patch_idx) {
4723                 # read and prepare patch information
4724                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4725
4726                 # generate anchor for "patch" links in difftree / whatchanged part
4727                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4728                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4729                       "</div>\n";  # class="patch"
4730
4731                 $patch_number++;
4732         }
4733
4734         if ($patch_number == 0) {
4735                 if (@hash_parents > 1) {
4736                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4737                 } else {
4738                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4739                 }
4740         }
4741
4742         print "</div>\n"; # class="patchset"
4743 }
4744
4745 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4746
4747 # fills project list info (age, description, owner, forks) for each
4748 # project in the list, removing invalid projects from returned list
4749 # NOTE: modifies $projlist, but does not remove entries from it
4750 sub fill_project_list_info {
4751         my ($projlist, $check_forks) = @_;
4752         my @projects;
4753
4754         my $show_ctags = gitweb_check_feature('ctags');
4755  PROJECT:
4756         foreach my $pr (@$projlist) {
4757                 my (@activity) = git_get_last_activity($pr->{'path'});
4758                 unless (@activity) {
4759                         next PROJECT;
4760                 }
4761                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4762                 if (!defined $pr->{'descr'}) {
4763                         my $descr = git_get_project_description($pr->{'path'}) || "";
4764                         $descr = to_utf8($descr);
4765                         $pr->{'descr_long'} = $descr;
4766                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4767                 }
4768                 if (!defined $pr->{'owner'}) {
4769                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4770                 }
4771                 if ($check_forks) {
4772                         my $pname = $pr->{'path'};
4773                         if (($pname =~ s/\.git$//) &&
4774                             ($pname !~ /\/$/) &&
4775                             (-d "$projectroot/$pname")) {
4776                                 $pr->{'forks'} = "-d $projectroot/$pname";
4777                         } else {
4778                                 $pr->{'forks'} = 0;
4779                         }
4780                 }
4781                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4782                 push @projects, $pr;
4783         }
4784
4785         return @projects;
4786 }
4787
4788 # print 'sort by' <th> element, generating 'sort by $name' replay link
4789 # if that order is not selected
4790 sub print_sort_th {
4791         print format_sort_th(@_);
4792 }
4793
4794 sub format_sort_th {
4795         my ($name, $order, $header) = @_;
4796         my $sort_th = "";
4797         $header ||= ucfirst($name);
4798
4799         if ($order eq $name) {
4800                 $sort_th .= "<th>$header</th>\n";
4801         } else {
4802                 $sort_th .= "<th>" .
4803                             $cgi->a({-href => href(-replay=>1, order=>$name),
4804                                      -class => "header"}, $header) .
4805                             "</th>\n";
4806         }
4807
4808         return $sort_th;
4809 }
4810
4811 sub git_project_list_body {
4812         # actually uses global variable $project
4813         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4814
4815         my $check_forks = gitweb_check_feature('forks');
4816         my @projects = fill_project_list_info($projlist, $check_forks);
4817
4818         $order ||= $default_projects_order;
4819         $from = 0 unless defined $from;
4820         $to = $#projects if (!defined $to || $#projects < $to);
4821
4822         my %order_info = (
4823                 project => { key => 'path', type => 'str' },
4824                 descr => { key => 'descr_long', type => 'str' },
4825                 owner => { key => 'owner', type => 'str' },
4826                 age => { key => 'age', type => 'num' }
4827         );
4828         my $oi = $order_info{$order};
4829         if ($oi->{'type'} eq 'str') {
4830                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4831         } else {
4832                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4833         }
4834
4835         my $show_ctags = gitweb_check_feature('ctags');
4836         if ($show_ctags) {
4837                 my %ctags;
4838                 foreach my $p (@projects) {
4839                         foreach my $ct (keys %{$p->{'ctags'}}) {
4840                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4841                         }
4842                 }
4843                 my $cloud = git_populate_project_tagcloud(\%ctags);
4844                 print git_show_project_tagcloud($cloud, 64);
4845         }
4846
4847         print "<table class=\"project_list\">\n";
4848         unless ($no_header) {
4849                 print "<tr>\n";
4850                 if ($check_forks) {
4851                         print "<th></th>\n";
4852                 }
4853                 print_sort_th('project', $order, 'Project');
4854                 print_sort_th('descr', $order, 'Description');
4855                 print_sort_th('owner', $order, 'Owner');
4856                 print_sort_th('age', $order, 'Last Change');
4857                 print "<th></th>\n" . # for links
4858                       "</tr>\n";
4859         }
4860         my $alternate = 1;
4861         my $tagfilter = $cgi->param('by_tag');
4862         for (my $i = $from; $i <= $to; $i++) {
4863                 my $pr = $projects[$i];
4864
4865                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4866                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4867                         and not $pr->{'descr_long'} =~ /$searchtext/;
4868                 # Weed out forks or non-matching entries of search
4869                 if ($check_forks) {
4870                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4871                         $forkbase="^$forkbase" if $forkbase;
4872                         next if not $searchtext and not $tagfilter and $show_ctags
4873                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4874                 }
4875
4876                 if ($alternate) {
4877                         print "<tr class=\"dark\">\n";
4878                 } else {
4879                         print "<tr class=\"light\">\n";
4880                 }
4881                 $alternate ^= 1;
4882                 if ($check_forks) {
4883                         print "<td>";
4884                         if ($pr->{'forks'}) {
4885                                 print "<!-- $pr->{'forks'} -->\n";
4886                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4887                         }
4888                         print "</td>\n";
4889                 }
4890                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4891                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4892                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4893                                         -class => "list", -title => $pr->{'descr_long'}},
4894                                         esc_html($pr->{'descr'})) . "</td>\n" .
4895                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4896                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4897                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4898                       "<td class=\"link\">" .
4899                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4900                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4901                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4902                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4903                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4904                       "</td>\n" .
4905                       "</tr>\n";
4906         }
4907         if (defined $extra) {
4908                 print "<tr>\n";
4909                 if ($check_forks) {
4910                         print "<td></td>\n";
4911                 }
4912                 print "<td colspan=\"5\">$extra</td>\n" .
4913                       "</tr>\n";
4914         }
4915         print "</table>\n";
4916 }
4917
4918 sub git_log_body {
4919         # uses global variable $project
4920         my ($commitlist, $from, $to, $refs, $extra) = @_;
4921
4922         $from = 0 unless defined $from;
4923         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4924
4925         for (my $i = 0; $i <= $to; $i++) {
4926                 my %co = %{$commitlist->[$i]};
4927                 next if !%co;
4928                 my $commit = $co{'id'};
4929                 my $ref = format_ref_marker($refs, $commit);
4930                 my %ad = parse_date($co{'author_epoch'});
4931                 git_print_header_div('commit',
4932                                "<span class=\"age\">$co{'age_string'}</span>" .
4933                                esc_html($co{'title'}) . $ref,
4934                                $commit);
4935                 print "<div class=\"title_text\">\n" .
4936                       "<div class=\"log_link\">\n" .
4937                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4938                       " | " .
4939                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4940                       " | " .
4941                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4942                       "<br/>\n" .
4943                       "</div>\n";
4944                       git_print_authorship(\%co, -tag => 'span');
4945                       print "<br/>\n</div>\n";
4946
4947                 print "<div class=\"log_body\">\n";
4948                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4949                 print "</div>\n";
4950         }
4951         if ($extra) {
4952                 print "<div class=\"page_nav\">\n";
4953                 print "$extra\n";
4954                 print "</div>\n";
4955         }
4956 }
4957
4958 sub git_shortlog_body {
4959         # uses global variable $project
4960         my ($commitlist, $from, $to, $refs, $extra) = @_;
4961
4962         $from = 0 unless defined $from;
4963         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4964
4965         print "<table class=\"shortlog\">\n";
4966         my $alternate = 1;
4967         for (my $i = $from; $i <= $to; $i++) {
4968                 my %co = %{$commitlist->[$i]};
4969                 my $commit = $co{'id'};
4970                 my $ref = format_ref_marker($refs, $commit);
4971                 if ($alternate) {
4972                         print "<tr class=\"dark\">\n";
4973                 } else {
4974                         print "<tr class=\"light\">\n";
4975                 }
4976                 $alternate ^= 1;
4977                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4978                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4979                       format_author_html('td', \%co, 10) . "<td>";
4980                 print format_subject_html($co{'title'}, $co{'title_short'},
4981                                           href(action=>"commit", hash=>$commit), $ref);
4982                 print "</td>\n" .
4983                       "<td class=\"link\">" .
4984                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4985                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4986                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4987                 my $snapshot_links = format_snapshot_links($commit);
4988                 if (defined $snapshot_links) {
4989                         print " | " . $snapshot_links;
4990                 }
4991                 print "</td>\n" .
4992                       "</tr>\n";
4993         }
4994         if (defined $extra) {
4995                 print "<tr>\n" .
4996                       "<td colspan=\"4\">$extra</td>\n" .
4997                       "</tr>\n";
4998         }
4999         print "</table>\n";
5000 }
5001
5002 sub git_history_body {
5003         # Warning: assumes constant type (blob or tree) during history
5004         my ($commitlist, $from, $to, $refs, $extra,
5005             $file_name, $file_hash, $ftype) = @_;
5006
5007         $from = 0 unless defined $from;
5008         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5009
5010         print "<table class=\"history\">\n";
5011         my $alternate = 1;
5012         for (my $i = $from; $i <= $to; $i++) {
5013                 my %co = %{$commitlist->[$i]};
5014                 if (!%co) {
5015                         next;
5016                 }
5017                 my $commit = $co{'id'};
5018
5019                 my $ref = format_ref_marker($refs, $commit);
5020
5021                 if ($alternate) {
5022                         print "<tr class=\"dark\">\n";
5023                 } else {
5024                         print "<tr class=\"light\">\n";
5025                 }
5026                 $alternate ^= 1;
5027                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5028         # shortlog:   format_author_html('td', \%co, 10)
5029                       format_author_html('td', \%co, 15, 3) . "<td>";
5030                 # originally git_history used chop_str($co{'title'}, 50)
5031                 print format_subject_html($co{'title'}, $co{'title_short'},
5032                                           href(action=>"commit", hash=>$commit), $ref);
5033                 print "</td>\n" .
5034                       "<td class=\"link\">" .
5035                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5036                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5037
5038                 if ($ftype eq 'blob') {
5039                         my $blob_current = $file_hash;
5040                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5041                         if (defined $blob_current && defined $blob_parent &&
5042                                         $blob_current ne $blob_parent) {
5043                                 print " | " .
5044                                         $cgi->a({-href => href(action=>"blobdiff",
5045                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5046                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5047                                                                file_name=>$file_name)},
5048                                                 "diff to current");
5049                         }
5050                 }
5051                 print "</td>\n" .
5052                       "</tr>\n";
5053         }
5054         if (defined $extra) {
5055                 print "<tr>\n" .
5056                       "<td colspan=\"4\">$extra</td>\n" .
5057                       "</tr>\n";
5058         }
5059         print "</table>\n";
5060 }
5061
5062 sub git_tags_body {
5063         # uses global variable $project
5064         my ($taglist, $from, $to, $extra) = @_;
5065         $from = 0 unless defined $from;
5066         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5067
5068         print "<table class=\"tags\">\n";
5069         my $alternate = 1;
5070         for (my $i = $from; $i <= $to; $i++) {
5071                 my $entry = $taglist->[$i];
5072                 my %tag = %$entry;
5073                 my $comment = $tag{'subject'};
5074                 my $comment_short;
5075                 if (defined $comment) {
5076                         $comment_short = chop_str($comment, 30, 5);
5077                 }
5078                 if ($alternate) {
5079                         print "<tr class=\"dark\">\n";
5080                 } else {
5081                         print "<tr class=\"light\">\n";
5082                 }
5083                 $alternate ^= 1;
5084                 if (defined $tag{'age'}) {
5085                         print "<td><i>$tag{'age'}</i></td>\n";
5086                 } else {
5087                         print "<td></td>\n";
5088                 }
5089                 print "<td>" .
5090                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5091                                -class => "list name"}, esc_html($tag{'name'})) .
5092                       "</td>\n" .
5093                       "<td>";
5094                 if (defined $comment) {
5095                         print format_subject_html($comment, $comment_short,
5096                                                   href(action=>"tag", hash=>$tag{'id'}));
5097                 }
5098                 print "</td>\n" .
5099                       "<td class=\"selflink\">";
5100                 if ($tag{'type'} eq "tag") {
5101                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5102                 } else {
5103                         print "&nbsp;";
5104                 }
5105                 print "</td>\n" .
5106                       "<td class=\"link\">" . " | " .
5107                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5108                 if ($tag{'reftype'} eq "commit") {
5109                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5110                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5111                 } elsif ($tag{'reftype'} eq "blob") {
5112                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5113                 }
5114                 print "</td>\n" .
5115                       "</tr>";
5116         }
5117         if (defined $extra) {
5118                 print "<tr>\n" .
5119                       "<td colspan=\"5\">$extra</td>\n" .
5120                       "</tr>\n";
5121         }
5122         print "</table>\n";
5123 }
5124
5125 sub git_heads_body {
5126         # uses global variable $project
5127         my ($headlist, $head, $from, $to, $extra) = @_;
5128         $from = 0 unless defined $from;
5129         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5130
5131         print "<table class=\"heads\">\n";
5132         my $alternate = 1;
5133         for (my $i = $from; $i <= $to; $i++) {
5134                 my $entry = $headlist->[$i];
5135                 my %ref = %$entry;
5136                 my $curr = $ref{'id'} eq $head;
5137                 if ($alternate) {
5138                         print "<tr class=\"dark\">\n";
5139                 } else {
5140                         print "<tr class=\"light\">\n";
5141                 }
5142                 $alternate ^= 1;
5143                 print "<td><i>$ref{'age'}</i></td>\n" .
5144                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5145                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5146                                -class => "list name"},esc_html($ref{'name'})) .
5147                       "</td>\n" .
5148                       "<td class=\"link\">" .
5149                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5150                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5151                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5152                       "</td>\n" .
5153                       "</tr>";
5154         }
5155         if (defined $extra) {
5156                 print "<tr>\n" .
5157                       "<td colspan=\"3\">$extra</td>\n" .
5158                       "</tr>\n";
5159         }
5160         print "</table>\n";
5161 }
5162
5163 # Display a single remote block
5164 sub git_remote_block {
5165         my ($remote, $rdata, $limit, $head) = @_;
5166
5167         my $heads = $rdata->{'heads'};
5168         my $fetch = $rdata->{'fetch'};
5169         my $push = $rdata->{'push'};
5170
5171         my $urls_table = "<table class=\"projects_list\">\n" ;
5172
5173         if (defined $fetch) {
5174                 if ($fetch eq $push) {
5175                         $urls_table .= format_repo_url("URL", $fetch);
5176                 } else {
5177                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5178                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5179                 }
5180         } elsif (defined $push) {
5181                 $urls_table .= format_repo_url("Push URL", $push);
5182         } else {
5183                 $urls_table .= format_repo_url("", "No remote URL");
5184         }
5185
5186         $urls_table .= "</table>\n";
5187
5188         my $dots;
5189         if (defined $limit && $limit < @$heads) {
5190                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5191         }
5192
5193         print $urls_table;
5194         git_heads_body($heads, $head, 0, $limit, $dots);
5195 }
5196
5197 # Display a list of remote names with the respective fetch and push URLs
5198 sub git_remotes_list {
5199         my ($remotedata, $limit) = @_;
5200         print "<table class=\"heads\">\n";
5201         my $alternate = 1;
5202         my @remotes = sort keys %$remotedata;
5203
5204         my $limited = $limit && $limit < @remotes;
5205
5206         $#remotes = $limit - 1 if $limited;
5207
5208         while (my $remote = shift @remotes) {
5209                 my $rdata = $remotedata->{$remote};
5210                 my $fetch = $rdata->{'fetch'};
5211                 my $push = $rdata->{'push'};
5212                 if ($alternate) {
5213                         print "<tr class=\"dark\">\n";
5214                 } else {
5215                         print "<tr class=\"light\">\n";
5216                 }
5217                 $alternate ^= 1;
5218                 print "<td>" .
5219                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5220                                -class=> "list name"},esc_html($remote)) .
5221                       "</td>";
5222                 print "<td class=\"link\">" .
5223                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5224                       " | " .
5225                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5226                       "</td>";
5227
5228                 print "</tr>\n";
5229         }
5230
5231         if ($limited) {
5232                 print "<tr>\n" .
5233                       "<td colspan=\"3\">" .
5234                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5235                       "</td>\n" . "</tr>\n";
5236         }
5237
5238         print "</table>";
5239 }
5240
5241 # Display remote heads grouped by remote, unless there are too many
5242 # remotes, in which case we only display the remote names
5243 sub git_remotes_body {
5244         my ($remotedata, $limit, $head) = @_;
5245         if ($limit and $limit < keys %$remotedata) {
5246                 git_remotes_list($remotedata, $limit);
5247         } else {
5248                 fill_remote_heads($remotedata);
5249                 while (my ($remote, $rdata) = each %$remotedata) {
5250                         git_print_section({-class=>"remote", -id=>$remote},
5251                                 ["remotes", $remote, $remote], sub {
5252                                         git_remote_block($remote, $rdata, $limit, $head);
5253                                 });
5254                 }
5255         }
5256 }
5257
5258 sub git_search_grep_body {
5259         my ($commitlist, $from, $to, $extra) = @_;
5260         $from = 0 unless defined $from;
5261         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5262
5263         print "<table class=\"commit_search\">\n";
5264         my $alternate = 1;
5265         for (my $i = $from; $i <= $to; $i++) {
5266                 my %co = %{$commitlist->[$i]};
5267                 if (!%co) {
5268                         next;
5269                 }
5270                 my $commit = $co{'id'};
5271                 if ($alternate) {
5272                         print "<tr class=\"dark\">\n";
5273                 } else {
5274                         print "<tr class=\"light\">\n";
5275                 }
5276                 $alternate ^= 1;
5277                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5278                       format_author_html('td', \%co, 15, 5) .
5279                       "<td>" .
5280                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5281                                -class => "list subject"},
5282                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5283                 my $comment = $co{'comment'};
5284                 foreach my $line (@$comment) {
5285                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5286                                 my ($lead, $match, $trail) = ($1, $2, $3);
5287                                 $match = chop_str($match, 70, 5, 'center');
5288                                 my $contextlen = int((80 - length($match))/2);
5289                                 $contextlen = 30 if ($contextlen > 30);
5290                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5291                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5292
5293                                 $lead  = esc_html($lead);
5294                                 $match = esc_html($match);
5295                                 $trail = esc_html($trail);
5296
5297                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5298                         }
5299                 }
5300                 print "</td>\n" .
5301                       "<td class=\"link\">" .
5302                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5303                       " | " .
5304                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5305                       " | " .
5306                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5307                 print "</td>\n" .
5308                       "</tr>\n";
5309         }
5310         if (defined $extra) {
5311                 print "<tr>\n" .
5312                       "<td colspan=\"3\">$extra</td>\n" .
5313                       "</tr>\n";
5314         }
5315         print "</table>\n";
5316 }
5317
5318 ## ======================================================================
5319 ## ======================================================================
5320 ## actions
5321
5322 sub git_project_list {
5323         my $order = $input_params{'order'};
5324         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5325                 die_error(400, "Unknown order parameter");
5326         }
5327
5328         my @list = git_get_projects_list();
5329         if (!@list) {
5330                 die_error(404, "No projects found");
5331         }
5332
5333         git_header_html();
5334         if (defined $home_text && -f $home_text) {
5335                 print "<div class=\"index_include\">\n";
5336                 insert_file($home_text);
5337                 print "</div>\n";
5338         }
5339         print $cgi->startform(-method => "get") .
5340               "<p class=\"projsearch\">Search:\n" .
5341               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5342               "</p>" .
5343               $cgi->end_form() . "\n";
5344         git_project_list_body(\@list, $order);
5345         git_footer_html();
5346 }
5347
5348 sub git_forks {
5349         my $order = $input_params{'order'};
5350         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5351                 die_error(400, "Unknown order parameter");
5352         }
5353
5354         my @list = git_get_projects_list($project);
5355         if (!@list) {
5356                 die_error(404, "No forks found");
5357         }
5358
5359         git_header_html();
5360         git_print_page_nav('','');
5361         git_print_header_div('summary', "$project forks");
5362         git_project_list_body(\@list, $order);
5363         git_footer_html();
5364 }
5365
5366 sub git_project_index {
5367         my @projects = git_get_projects_list($project);
5368
5369         print $cgi->header(
5370                 -type => 'text/plain',
5371                 -charset => 'utf-8',
5372                 -content_disposition => 'inline; filename="index.aux"');
5373
5374         foreach my $pr (@projects) {
5375                 if (!exists $pr->{'owner'}) {
5376                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5377                 }
5378
5379                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5380                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5381                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5382                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5383                 $path  =~ s/ /\+/g;
5384                 $owner =~ s/ /\+/g;
5385
5386                 print "$path $owner\n";
5387         }
5388 }
5389
5390 sub git_summary {
5391         my $descr = git_get_project_description($project) || "none";
5392         my %co = parse_commit("HEAD");
5393         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5394         my $head = $co{'id'};
5395         my $remote_heads = gitweb_check_feature('remote_heads');
5396
5397         my $owner = git_get_project_owner($project);
5398
5399         my $refs = git_get_references();
5400         # These get_*_list functions return one more to allow us to see if
5401         # there are more ...
5402         my @taglist  = git_get_tags_list(16);
5403         my @headlist = git_get_heads_list(16);
5404         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5405         my @forklist;
5406         my $check_forks = gitweb_check_feature('forks');
5407
5408         if ($check_forks) {
5409                 @forklist = git_get_projects_list($project);
5410         }
5411
5412         git_header_html();
5413         git_print_page_nav('summary','', $head);
5414
5415         print "<div class=\"title\">&nbsp;</div>\n";
5416         print "<table class=\"projects_list\">\n" .
5417               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5418               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5419         if (defined $cd{'rfc2822'}) {
5420                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5421         }
5422
5423         # use per project git URL list in $projectroot/$project/cloneurl
5424         # or make project git URL from git base URL and project name
5425         my $url_tag = "URL";
5426         my @url_list = git_get_project_url_list($project);
5427         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5428         foreach my $git_url (@url_list) {
5429                 next unless $git_url;
5430                 print format_repo_url($url_tag, $git_url);
5431                 $url_tag = "";
5432         }
5433
5434         # Tag cloud
5435         my $show_ctags = gitweb_check_feature('ctags');
5436         if ($show_ctags) {
5437                 my $ctags = git_get_project_ctags($project);
5438                 my $cloud = git_populate_project_tagcloud($ctags);
5439                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5440                 print "</td>\n<td>" unless %$ctags;
5441                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5442                 print "</td>\n<td>" if %$ctags;
5443                 print git_show_project_tagcloud($cloud, 48);
5444                 print "</td></tr>";
5445         }
5446
5447         print "</table>\n";
5448
5449         # If XSS prevention is on, we don't include README.html.
5450         # TODO: Allow a readme in some safe format.
5451         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5452                 print "<div class=\"title\">readme</div>\n" .
5453                       "<div class=\"readme\">\n";
5454                 insert_file("$projectroot/$project/README.html");
5455                 print "\n</div>\n"; # class="readme"
5456         }
5457
5458         # we need to request one more than 16 (0..15) to check if
5459         # those 16 are all
5460         my @commitlist = $head ? parse_commits($head, 17) : ();
5461         if (@commitlist) {
5462                 git_print_header_div('shortlog');
5463                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5464                                   $#commitlist <=  15 ? undef :
5465                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5466         }
5467
5468         if (@taglist) {
5469                 git_print_header_div('tags');
5470                 git_tags_body(\@taglist, 0, 15,
5471                               $#taglist <=  15 ? undef :
5472                               $cgi->a({-href => href(action=>"tags")}, "..."));
5473         }
5474
5475         if (@headlist) {
5476                 git_print_header_div('heads');
5477                 git_heads_body(\@headlist, $head, 0, 15,
5478                                $#headlist <= 15 ? undef :
5479                                $cgi->a({-href => href(action=>"heads")}, "..."));
5480         }
5481
5482         if (%remotedata) {
5483                 git_print_header_div('remotes');
5484                 git_remotes_body(\%remotedata, 15, $head);
5485         }
5486
5487         if (@forklist) {
5488                 git_print_header_div('forks');
5489                 git_project_list_body(\@forklist, 'age', 0, 15,
5490                                       $#forklist <= 15 ? undef :
5491                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5492                                       'no_header');
5493         }
5494
5495         git_footer_html();
5496 }
5497
5498 sub git_tag {
5499         my %tag = parse_tag($hash);
5500
5501         if (! %tag) {
5502                 die_error(404, "Unknown tag object");
5503         }
5504
5505         my $head = git_get_head_hash($project);
5506         git_header_html();
5507         git_print_page_nav('','', $head,undef,$head);
5508         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5509         print "<div class=\"title_text\">\n" .
5510               "<table class=\"object_header\">\n" .
5511               "<tr>\n" .
5512               "<td>object</td>\n" .
5513               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5514                                $tag{'object'}) . "</td>\n" .
5515               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5516                                               $tag{'type'}) . "</td>\n" .
5517               "</tr>\n";
5518         if (defined($tag{'author'})) {
5519                 git_print_authorship_rows(\%tag, 'author');
5520         }
5521         print "</table>\n\n" .
5522               "</div>\n";
5523         print "<div class=\"page_body\">";
5524         my $comment = $tag{'comment'};
5525         foreach my $line (@$comment) {
5526                 chomp $line;
5527                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5528         }
5529         print "</div>\n";
5530         git_footer_html();
5531 }
5532
5533 sub git_blame_common {
5534         my $format = shift || 'porcelain';
5535         if ($format eq 'porcelain' && $cgi->param('js')) {
5536                 $format = 'incremental';
5537                 $action = 'blame_incremental'; # for page title etc
5538         }
5539
5540         # permissions
5541         gitweb_check_feature('blame')
5542                 or die_error(403, "Blame view not allowed");
5543
5544         # error checking
5545         die_error(400, "No file name given") unless $file_name;
5546         $hash_base ||= git_get_head_hash($project);
5547         die_error(404, "Couldn't find base commit") unless $hash_base;
5548         my %co = parse_commit($hash_base)
5549                 or die_error(404, "Commit not found");
5550         my $ftype = "blob";
5551         if (!defined $hash) {
5552                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5553                         or die_error(404, "Error looking up file");
5554         } else {
5555                 $ftype = git_get_type($hash);
5556                 if ($ftype !~ "blob") {
5557                         die_error(400, "Object is not a blob");
5558                 }
5559         }
5560
5561         my $fd;
5562         if ($format eq 'incremental') {
5563                 # get file contents (as base)
5564                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5565                         or die_error(500, "Open git-cat-file failed");
5566         } elsif ($format eq 'data') {
5567                 # run git-blame --incremental
5568                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5569                         $hash_base, "--", $file_name
5570                         or die_error(500, "Open git-blame --incremental failed");
5571         } else {
5572                 # run git-blame --porcelain
5573                 open $fd, "-|", git_cmd(), "blame", '-p',
5574                         $hash_base, '--', $file_name
5575                         or die_error(500, "Open git-blame --porcelain failed");
5576         }
5577
5578         # incremental blame data returns early
5579         if ($format eq 'data') {
5580                 print $cgi->header(
5581                         -type=>"text/plain", -charset => "utf-8",
5582                         -status=> "200 OK");
5583                 local $| = 1; # output autoflush
5584                 print while <$fd>;
5585                 close $fd
5586                         or print "ERROR $!\n";
5587
5588                 print 'END';
5589                 if (defined $t0 && gitweb_check_feature('timed')) {
5590                         print ' '.
5591                               tv_interval($t0, [ gettimeofday() ]).
5592                               ' '.$number_of_git_cmds;
5593                 }
5594                 print "\n";
5595
5596                 return;
5597         }
5598
5599         # page header
5600         git_header_html();
5601         my $formats_nav =
5602                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5603                         "blob") .
5604                 " | ";
5605         if ($format eq 'incremental') {
5606                 $formats_nav .=
5607                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5608                                 "blame") . " (non-incremental)";
5609         } else {
5610                 $formats_nav .=
5611                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5612                                 "blame") . " (incremental)";
5613         }
5614         $formats_nav .=
5615                 " | " .
5616                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5617                         "history") .
5618                 " | " .
5619                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5620                         "HEAD");
5621         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5622         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5623         git_print_page_path($file_name, $ftype, $hash_base);
5624
5625         # page body
5626         if ($format eq 'incremental') {
5627                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5628                       "This page requires JavaScript to run.\n Use ".
5629                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5630                               'this page').
5631                       " instead.\n".
5632                       "</b></center></div>\n</noscript>\n";
5633
5634                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5635         }
5636
5637         print qq!<div class="page_body">\n!;
5638         print qq!<div id="progress_info">... / ...</div>\n!
5639                 if ($format eq 'incremental');
5640         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5641               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5642               qq!<thead>\n!.
5643               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5644               qq!</thead>\n!.
5645               qq!<tbody>\n!;
5646
5647         my @rev_color = qw(light dark);
5648         my $num_colors = scalar(@rev_color);
5649         my $current_color = 0;
5650
5651         if ($format eq 'incremental') {
5652                 my $color_class = $rev_color[$current_color];
5653
5654                 #contents of a file
5655                 my $linenr = 0;
5656         LINE:
5657                 while (my $line = <$fd>) {
5658                         chomp $line;
5659                         $linenr++;
5660
5661                         print qq!<tr id="l$linenr" class="$color_class">!.
5662                               qq!<td class="sha1"><a href=""> </a></td>!.
5663                               qq!<td class="linenr">!.
5664                               qq!<a class="linenr" href="">$linenr</a></td>!;
5665                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5666                         print qq!</tr>\n!;
5667                 }
5668
5669         } else { # porcelain, i.e. ordinary blame
5670                 my %metainfo = (); # saves information about commits
5671
5672                 # blame data
5673         LINE:
5674                 while (my $line = <$fd>) {
5675                         chomp $line;
5676                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5677                         # no <lines in group> for subsequent lines in group of lines
5678                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5679                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5680                         if (!exists $metainfo{$full_rev}) {
5681                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5682                         }
5683                         my $meta = $metainfo{$full_rev};
5684                         my $data;
5685                         while ($data = <$fd>) {
5686                                 chomp $data;
5687                                 last if ($data =~ s/^\t//); # contents of line
5688                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5689                                         $meta->{$1} = $2 unless exists $meta->{$1};
5690                                 }
5691                                 if ($data =~ /^previous /) {
5692                                         $meta->{'nprevious'}++;
5693                                 }
5694                         }
5695                         my $short_rev = substr($full_rev, 0, 8);
5696                         my $author = $meta->{'author'};
5697                         my %date =
5698                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5699                         my $date = $date{'iso-tz'};
5700                         if ($group_size) {
5701                                 $current_color = ($current_color + 1) % $num_colors;
5702                         }
5703                         my $tr_class = $rev_color[$current_color];
5704                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5705                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5706                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5707                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5708                         if ($group_size) {
5709                                 print "<td class=\"sha1\"";
5710                                 print " title=\"". esc_html($author) . ", $date\"";
5711                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5712                                 print ">";
5713                                 print $cgi->a({-href => href(action=>"commit",
5714                                                              hash=>$full_rev,
5715                                                              file_name=>$file_name)},
5716                                               esc_html($short_rev));
5717                                 if ($group_size >= 2) {
5718                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5719                                         if (@author_initials) {
5720                                                 print "<br />" .
5721                                                       esc_html(join('', @author_initials));
5722                                                 #           or join('.', ...)
5723                                         }
5724                                 }
5725                                 print "</td>\n";
5726                         }
5727                         # 'previous' <sha1 of parent commit> <filename at commit>
5728                         if (exists $meta->{'previous'} &&
5729                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5730                                 $meta->{'parent'} = $1;
5731                                 $meta->{'file_parent'} = unquote($2);
5732                         }
5733                         my $linenr_commit =
5734                                 exists($meta->{'parent'}) ?
5735                                 $meta->{'parent'} : $full_rev;
5736                         my $linenr_filename =
5737                                 exists($meta->{'file_parent'}) ?
5738                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5739                         my $blamed = href(action => 'blame',
5740                                           file_name => $linenr_filename,
5741                                           hash_base => $linenr_commit);
5742                         print "<td class=\"linenr\">";
5743                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5744                                         -class => "linenr" },
5745                                       esc_html($lineno));
5746                         print "</td>";
5747                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5748                         print "</tr>\n";
5749                 } # end while
5750
5751         }
5752
5753         # footer
5754         print "</tbody>\n".
5755               "</table>\n"; # class="blame"
5756         print "</div>\n";   # class="blame_body"
5757         close $fd
5758                 or print "Reading blob failed\n";
5759
5760         git_footer_html();
5761 }
5762
5763 sub git_blame {
5764         git_blame_common();
5765 }
5766
5767 sub git_blame_incremental {
5768         git_blame_common('incremental');
5769 }
5770
5771 sub git_blame_data {
5772         git_blame_common('data');
5773 }
5774
5775 sub git_tags {
5776         my $head = git_get_head_hash($project);
5777         git_header_html();
5778         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5779         git_print_header_div('summary', $project);
5780
5781         my @tagslist = git_get_tags_list();
5782         if (@tagslist) {
5783                 git_tags_body(\@tagslist);
5784         }
5785         git_footer_html();
5786 }
5787
5788 sub git_heads {
5789         my $head = git_get_head_hash($project);
5790         git_header_html();
5791         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5792         git_print_header_div('summary', $project);
5793
5794         my @headslist = git_get_heads_list();
5795         if (@headslist) {
5796                 git_heads_body(\@headslist, $head);
5797         }
5798         git_footer_html();
5799 }
5800
5801 # used both for single remote view and for list of all the remotes
5802 sub git_remotes {
5803         gitweb_check_feature('remote_heads')
5804                 or die_error(403, "Remote heads view is disabled");
5805
5806         my $head = git_get_head_hash($project);
5807         my $remote = $input_params{'hash'};
5808
5809         my $remotedata = git_get_remotes_list($remote);
5810         die_error(500, "Unable to get remote information") unless defined $remotedata;
5811
5812         unless (%$remotedata) {
5813                 die_error(404, defined $remote ?
5814                         "Remote $remote not found" :
5815                         "No remotes found");
5816         }
5817
5818         git_header_html(undef, undef, -action_extra => $remote);
5819         git_print_page_nav('', '',  $head, undef, $head,
5820                 format_ref_views($remote ? '' : 'remotes'));
5821
5822         fill_remote_heads($remotedata);
5823         if (defined $remote) {
5824                 git_print_header_div('remotes', "$remote remote for $project");
5825                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5826         } else {
5827                 git_print_header_div('summary', "$project remotes");
5828                 git_remotes_body($remotedata, undef, $head);
5829         }
5830
5831         git_footer_html();
5832 }
5833
5834 sub git_blob_plain {
5835         my $type = shift;
5836         my $expires;
5837
5838         if (!defined $hash) {
5839                 if (defined $file_name) {
5840                         my $base = $hash_base || git_get_head_hash($project);
5841                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5842                                 or die_error(404, "Cannot find file");
5843                 } else {
5844                         die_error(400, "No file name defined");
5845                 }
5846         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5847                 # blobs defined by non-textual hash id's can be cached
5848                 $expires = "+1d";
5849         }
5850
5851         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5852                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5853
5854         # content-type (can include charset)
5855         $type = blob_contenttype($fd, $file_name, $type);
5856
5857         # "save as" filename, even when no $file_name is given
5858         my $save_as = "$hash";
5859         if (defined $file_name) {
5860                 $save_as = $file_name;
5861         } elsif ($type =~ m/^text\//) {
5862                 $save_as .= '.txt';
5863         }
5864
5865         # With XSS prevention on, blobs of all types except a few known safe
5866         # ones are served with "Content-Disposition: attachment" to make sure
5867         # they don't run in our security domain.  For certain image types,
5868         # blob view writes an <img> tag referring to blob_plain view, and we
5869         # want to be sure not to break that by serving the image as an
5870         # attachment (though Firefox 3 doesn't seem to care).
5871         my $sandbox = $prevent_xss &&
5872                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5873
5874         print $cgi->header(
5875                 -type => $type,
5876                 -expires => $expires,
5877                 -content_disposition =>
5878                         ($sandbox ? 'attachment' : 'inline')
5879                         . '; filename="' . $save_as . '"');
5880         local $/ = undef;
5881         binmode STDOUT, ':raw';
5882         print <$fd>;
5883         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5884         close $fd;
5885 }
5886
5887 sub git_blob {
5888         my $expires;
5889
5890         if (!defined $hash) {
5891                 if (defined $file_name) {
5892                         my $base = $hash_base || git_get_head_hash($project);
5893                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5894                                 or die_error(404, "Cannot find file");
5895                 } else {
5896                         die_error(400, "No file name defined");
5897                 }
5898         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5899                 # blobs defined by non-textual hash id's can be cached
5900                 $expires = "+1d";
5901         }
5902
5903         my $have_blame = gitweb_check_feature('blame');
5904         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5905                 or die_error(500, "Couldn't cat $file_name, $hash");
5906         my $mimetype = blob_mimetype($fd, $file_name);
5907         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5908         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5909                 close $fd;
5910                 return git_blob_plain($mimetype);
5911         }
5912         # we can have blame only for text/* mimetype
5913         $have_blame &&= ($mimetype =~ m!^text/!);
5914
5915         my $highlight = gitweb_check_feature('highlight');
5916         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5917         $fd = run_highlighter($fd, $highlight, $syntax)
5918                 if $syntax;
5919
5920         git_header_html(undef, $expires);
5921         my $formats_nav = '';
5922         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5923                 if (defined $file_name) {
5924                         if ($have_blame) {
5925                                 $formats_nav .=
5926                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5927                                                 "blame") .
5928                                         " | ";
5929                         }
5930                         $formats_nav .=
5931                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5932                                         "history") .
5933                                 " | " .
5934                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5935                                         "raw") .
5936                                 " | " .
5937                                 $cgi->a({-href => href(action=>"blob",
5938                                                        hash_base=>"HEAD", file_name=>$file_name)},
5939                                         "HEAD");
5940                 } else {
5941                         $formats_nav .=
5942                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5943                                         "raw");
5944                 }
5945                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5946                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5947         } else {
5948                 print "<div class=\"page_nav\">\n" .
5949                       "<br/><br/></div>\n" .
5950                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5951         }
5952         git_print_page_path($file_name, "blob", $hash_base);
5953         print "<div class=\"page_body\">\n";
5954         if ($mimetype =~ m!^image/!) {
5955                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5956                 if ($file_name) {
5957                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5958                 }
5959                 print qq! src="! .
5960                       href(action=>"blob_plain", hash=>$hash,
5961                            hash_base=>$hash_base, file_name=>$file_name) .
5962                       qq!" />\n!;
5963         } else {
5964                 my $nr;
5965                 while (my $line = <$fd>) {
5966                         chomp $line;
5967                         $nr++;
5968                         $line = untabify($line);
5969                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5970                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5971                 }
5972         }
5973         close $fd
5974                 or print "Reading blob failed.\n";
5975         print "</div>";
5976         git_footer_html();
5977 }
5978
5979 sub git_tree {
5980         if (!defined $hash_base) {
5981                 $hash_base = "HEAD";
5982         }
5983         if (!defined $hash) {
5984                 if (defined $file_name) {
5985                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5986                 } else {
5987                         $hash = $hash_base;
5988                 }
5989         }
5990         die_error(404, "No such tree") unless defined($hash);
5991
5992         my $show_sizes = gitweb_check_feature('show-sizes');
5993         my $have_blame = gitweb_check_feature('blame');
5994
5995         my @entries = ();
5996         {
5997                 local $/ = "\0";
5998                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5999                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6000                         or die_error(500, "Open git-ls-tree failed");
6001                 @entries = map { chomp; $_ } <$fd>;
6002                 close $fd
6003                         or die_error(404, "Reading tree failed");
6004         }
6005
6006         my $refs = git_get_references();
6007         my $ref = format_ref_marker($refs, $hash_base);
6008         git_header_html();
6009         my $basedir = '';
6010         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6011                 my @views_nav = ();
6012                 if (defined $file_name) {
6013                         push @views_nav,
6014                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6015                                         "history"),
6016                                 $cgi->a({-href => href(action=>"tree",
6017                                                        hash_base=>"HEAD", file_name=>$file_name)},
6018                                         "HEAD"),
6019                 }
6020                 my $snapshot_links = format_snapshot_links($hash);
6021                 if (defined $snapshot_links) {
6022                         # FIXME: Should be available when we have no hash base as well.
6023                         push @views_nav, $snapshot_links;
6024                 }
6025                 git_print_page_nav('tree','', $hash_base, undef, undef,
6026                                    join(' | ', @views_nav));
6027                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6028         } else {
6029                 undef $hash_base;
6030                 print "<div class=\"page_nav\">\n";
6031                 print "<br/><br/></div>\n";
6032                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6033         }
6034         if (defined $file_name) {
6035                 $basedir = $file_name;
6036                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6037                         $basedir .= '/';
6038                 }
6039                 git_print_page_path($file_name, 'tree', $hash_base);
6040         }
6041         print "<div class=\"page_body\">\n";
6042         print "<table class=\"tree\">\n";
6043         my $alternate = 1;
6044         # '..' (top directory) link if possible
6045         if (defined $hash_base &&
6046             defined $file_name && $file_name =~ m![^/]+$!) {
6047                 if ($alternate) {
6048                         print "<tr class=\"dark\">\n";
6049                 } else {
6050                         print "<tr class=\"light\">\n";
6051                 }
6052                 $alternate ^= 1;
6053
6054                 my $up = $file_name;
6055                 $up =~ s!/?[^/]+$!!;
6056                 undef $up unless $up;
6057                 # based on git_print_tree_entry
6058                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6059                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6060                 print '<td class="list">';
6061                 print $cgi->a({-href => href(action=>"tree",
6062                                              hash_base=>$hash_base,
6063                                              file_name=>$up)},
6064                               "..");
6065                 print "</td>\n";
6066                 print "<td class=\"link\"></td>\n";
6067
6068                 print "</tr>\n";
6069         }
6070         foreach my $line (@entries) {
6071                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6072
6073                 if ($alternate) {
6074                         print "<tr class=\"dark\">\n";
6075                 } else {
6076                         print "<tr class=\"light\">\n";
6077                 }
6078                 $alternate ^= 1;
6079
6080                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6081
6082                 print "</tr>\n";
6083         }
6084         print "</table>\n" .
6085               "</div>";
6086         git_footer_html();
6087 }
6088
6089 sub snapshot_name {
6090         my ($project, $hash) = @_;
6091
6092         # path/to/project.git  -> project
6093         # path/to/project/.git -> project
6094         my $name = to_utf8($project);
6095         $name =~ s,([^/])/*\.git$,$1,;
6096         $name = basename($name);
6097         # sanitize name
6098         $name =~ s/[[:cntrl:]]/?/g;
6099
6100         my $ver = $hash;
6101         if ($hash =~ /^[0-9a-fA-F]+$/) {
6102                 # shorten SHA-1 hash
6103                 my $full_hash = git_get_full_hash($project, $hash);
6104                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6105                         $ver = git_get_short_hash($project, $hash);
6106                 }
6107         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6108                 # tags don't need shortened SHA-1 hash
6109                 $ver = $1;
6110         } else {
6111                 # branches and other need shortened SHA-1 hash
6112                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6113                         $ver = $1;
6114                 }
6115                 $ver .= '-' . git_get_short_hash($project, $hash);
6116         }
6117         # in case of hierarchical branch names
6118         $ver =~ s!/!.!g;
6119
6120         # name = project-version_string
6121         $name = "$name-$ver";
6122
6123         return wantarray ? ($name, $name) : $name;
6124 }
6125
6126 sub git_snapshot {
6127         my $format = $input_params{'snapshot_format'};
6128         if (!@snapshot_fmts) {
6129                 die_error(403, "Snapshots not allowed");
6130         }
6131         # default to first supported snapshot format
6132         $format ||= $snapshot_fmts[0];
6133         if ($format !~ m/^[a-z0-9]+$/) {
6134                 die_error(400, "Invalid snapshot format parameter");
6135         } elsif (!exists($known_snapshot_formats{$format})) {
6136                 die_error(400, "Unknown snapshot format");
6137         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6138                 die_error(403, "Snapshot format not allowed");
6139         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6140                 die_error(403, "Unsupported snapshot format");
6141         }
6142
6143         my $type = git_get_type("$hash^{}");
6144         if (!$type) {
6145                 die_error(404, 'Object does not exist');
6146         }  elsif ($type eq 'blob') {
6147                 die_error(400, 'Object is not a tree-ish');
6148         }
6149
6150         my ($name, $prefix) = snapshot_name($project, $hash);
6151         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6152         my $cmd = quote_command(
6153                 git_cmd(), 'archive',
6154                 "--format=$known_snapshot_formats{$format}{'format'}",
6155                 "--prefix=$prefix/", $hash);
6156         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6157                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6158         }
6159
6160         $filename =~ s/(["\\])/\\$1/g;
6161         print $cgi->header(
6162                 -type => $known_snapshot_formats{$format}{'type'},
6163                 -content_disposition => 'inline; filename="' . $filename . '"',
6164                 -status => '200 OK');
6165
6166         open my $fd, "-|", $cmd
6167                 or die_error(500, "Execute git-archive failed");
6168         binmode STDOUT, ':raw';
6169         print <$fd>;
6170         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6171         close $fd;
6172 }
6173
6174 sub git_log_generic {
6175         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6176
6177         my $head = git_get_head_hash($project);
6178         if (!defined $base) {
6179                 $base = $head;
6180         }
6181         if (!defined $page) {
6182                 $page = 0;
6183         }
6184         my $refs = git_get_references();
6185
6186         my $commit_hash = $base;
6187         if (defined $parent) {
6188                 $commit_hash = "$parent..$base";
6189         }
6190         my @commitlist =
6191                 parse_commits($commit_hash, 101, (100 * $page),
6192                               defined $file_name ? ($file_name, "--full-history") : ());
6193
6194         my $ftype;
6195         if (!defined $file_hash && defined $file_name) {
6196                 # some commits could have deleted file in question,
6197                 # and not have it in tree, but one of them has to have it
6198                 for (my $i = 0; $i < @commitlist; $i++) {
6199                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6200                         last if defined $file_hash;
6201                 }
6202         }
6203         if (defined $file_hash) {
6204                 $ftype = git_get_type($file_hash);
6205         }
6206         if (defined $file_name && !defined $ftype) {
6207                 die_error(500, "Unknown type of object");
6208         }
6209         my %co;
6210         if (defined $file_name) {
6211                 %co = parse_commit($base)
6212                         or die_error(404, "Unknown commit object");
6213         }
6214
6215
6216         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6217         my $next_link = '';
6218         if ($#commitlist >= 100) {
6219                 $next_link =
6220                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6221                                  -accesskey => "n", -title => "Alt-n"}, "next");
6222         }
6223         my $patch_max = gitweb_get_feature('patches');
6224         if ($patch_max && !defined $file_name) {
6225                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6226                         $paging_nav .= " &sdot; " .
6227                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6228                                         "patches");
6229                 }
6230         }
6231
6232         git_header_html();
6233         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6234         if (defined $file_name) {
6235                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6236         } else {
6237                 git_print_header_div('summary', $project)
6238         }
6239         git_print_page_path($file_name, $ftype, $hash_base)
6240                 if (defined $file_name);
6241
6242         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6243                      $file_name, $file_hash, $ftype);
6244
6245         git_footer_html();
6246 }
6247
6248 sub git_log {
6249         git_log_generic('log', \&git_log_body,
6250                         $hash, $hash_parent);
6251 }
6252
6253 sub git_commit {
6254         $hash ||= $hash_base || "HEAD";
6255         my %co = parse_commit($hash)
6256             or die_error(404, "Unknown commit object");
6257
6258         my $parent  = $co{'parent'};
6259         my $parents = $co{'parents'}; # listref
6260
6261         # we need to prepare $formats_nav before any parameter munging
6262         my $formats_nav;
6263         if (!defined $parent) {
6264                 # --root commitdiff
6265                 $formats_nav .= '(initial)';
6266         } elsif (@$parents == 1) {
6267                 # single parent commit
6268                 $formats_nav .=
6269                         '(parent: ' .
6270                         $cgi->a({-href => href(action=>"commit",
6271                                                hash=>$parent)},
6272                                 esc_html(substr($parent, 0, 7))) .
6273                         ')';
6274         } else {
6275                 # merge commit
6276                 $formats_nav .=
6277                         '(merge: ' .
6278                         join(' ', map {
6279                                 $cgi->a({-href => href(action=>"commit",
6280                                                        hash=>$_)},
6281                                         esc_html(substr($_, 0, 7)));
6282                         } @$parents ) .
6283                         ')';
6284         }
6285         if (gitweb_check_feature('patches') && @$parents <= 1) {
6286                 $formats_nav .= " | " .
6287                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6288                                 "patch");
6289         }
6290
6291         if (!defined $parent) {
6292                 $parent = "--root";
6293         }
6294         my @difftree;
6295         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6296                 @diff_opts,
6297                 (@$parents <= 1 ? $parent : '-c'),
6298                 $hash, "--"
6299                 or die_error(500, "Open git-diff-tree failed");
6300         @difftree = map { chomp; $_ } <$fd>;
6301         close $fd or die_error(404, "Reading git-diff-tree failed");
6302
6303         # non-textual hash id's can be cached
6304         my $expires;
6305         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6306                 $expires = "+1d";
6307         }
6308         my $refs = git_get_references();
6309         my $ref = format_ref_marker($refs, $co{'id'});
6310
6311         git_header_html(undef, $expires);
6312         git_print_page_nav('commit', '',
6313                            $hash, $co{'tree'}, $hash,
6314                            $formats_nav);
6315
6316         if (defined $co{'parent'}) {
6317                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6318         } else {
6319                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6320         }
6321         print "<div class=\"title_text\">\n" .
6322               "<table class=\"object_header\">\n";
6323         git_print_authorship_rows(\%co);
6324         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6325         print "<tr>" .
6326               "<td>tree</td>" .
6327               "<td class=\"sha1\">" .
6328               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6329                        class => "list"}, $co{'tree'}) .
6330               "</td>" .
6331               "<td class=\"link\">" .
6332               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6333                       "tree");
6334         my $snapshot_links = format_snapshot_links($hash);
6335         if (defined $snapshot_links) {
6336                 print " | " . $snapshot_links;
6337         }
6338         print "</td>" .
6339               "</tr>\n";
6340
6341         foreach my $par (@$parents) {
6342                 print "<tr>" .
6343                       "<td>parent</td>" .
6344                       "<td class=\"sha1\">" .
6345                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6346                                class => "list"}, $par) .
6347                       "</td>" .
6348                       "<td class=\"link\">" .
6349                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6350                       " | " .
6351                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6352                       "</td>" .
6353                       "</tr>\n";
6354         }
6355         print "</table>".
6356               "</div>\n";
6357
6358         print "<div class=\"page_body\">\n";
6359         git_print_log($co{'comment'});
6360         print "</div>\n";
6361
6362         git_difftree_body(\@difftree, $hash, @$parents);
6363
6364         git_footer_html();
6365 }
6366
6367 sub git_object {
6368         # object is defined by:
6369         # - hash or hash_base alone
6370         # - hash_base and file_name
6371         my $type;
6372
6373         # - hash or hash_base alone
6374         if ($hash || ($hash_base && !defined $file_name)) {
6375                 my $object_id = $hash || $hash_base;
6376
6377                 open my $fd, "-|", quote_command(
6378                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6379                         or die_error(404, "Object does not exist");
6380                 $type = <$fd>;
6381                 chomp $type;
6382                 close $fd
6383                         or die_error(404, "Object does not exist");
6384
6385         # - hash_base and file_name
6386         } elsif ($hash_base && defined $file_name) {
6387                 $file_name =~ s,/+$,,;
6388
6389                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6390                         or die_error(404, "Base object does not exist");
6391
6392                 # here errors should not hapen
6393                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6394                         or die_error(500, "Open git-ls-tree failed");
6395                 my $line = <$fd>;
6396                 close $fd;
6397
6398                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6399                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6400                         die_error(404, "File or directory for given base does not exist");
6401                 }
6402                 $type = $2;
6403                 $hash = $3;
6404         } else {
6405                 die_error(400, "Not enough information to find object");
6406         }
6407
6408         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6409                                           hash=>$hash, hash_base=>$hash_base,
6410                                           file_name=>$file_name),
6411                              -status => '302 Found');
6412 }
6413
6414 sub git_blobdiff {
6415         my $format = shift || 'html';
6416
6417         my $fd;
6418         my @difftree;
6419         my %diffinfo;
6420         my $expires;
6421
6422         # preparing $fd and %diffinfo for git_patchset_body
6423         # new style URI
6424         if (defined $hash_base && defined $hash_parent_base) {
6425                 if (defined $file_name) {
6426                         # read raw output
6427                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6428                                 $hash_parent_base, $hash_base,
6429                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6430                                 or die_error(500, "Open git-diff-tree failed");
6431                         @difftree = map { chomp; $_ } <$fd>;
6432                         close $fd
6433                                 or die_error(404, "Reading git-diff-tree failed");
6434                         @difftree
6435                                 or die_error(404, "Blob diff not found");
6436
6437                 } elsif (defined $hash &&
6438                          $hash =~ /[0-9a-fA-F]{40}/) {
6439                         # try to find filename from $hash
6440
6441                         # read filtered raw output
6442                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6443                                 $hash_parent_base, $hash_base, "--"
6444                                 or die_error(500, "Open git-diff-tree failed");
6445                         @difftree =
6446                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6447                                 # $hash == to_id
6448                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6449                                 map { chomp; $_ } <$fd>;
6450                         close $fd
6451                                 or die_error(404, "Reading git-diff-tree failed");
6452                         @difftree
6453                                 or die_error(404, "Blob diff not found");
6454
6455                 } else {
6456                         die_error(400, "Missing one of the blob diff parameters");
6457                 }
6458
6459                 if (@difftree > 1) {
6460                         die_error(400, "Ambiguous blob diff specification");
6461                 }
6462
6463                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6464                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6465                 $file_name   ||= $diffinfo{'to_file'};
6466
6467                 $hash_parent ||= $diffinfo{'from_id'};
6468                 $hash        ||= $diffinfo{'to_id'};
6469
6470                 # non-textual hash id's can be cached
6471                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6472                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6473                         $expires = '+1d';
6474                 }
6475
6476                 # open patch output
6477                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6478                         '-p', ($format eq 'html' ? "--full-index" : ()),
6479                         $hash_parent_base, $hash_base,
6480                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6481                         or die_error(500, "Open git-diff-tree failed");
6482         }
6483
6484         # old/legacy style URI -- not generated anymore since 1.4.3.
6485         if (!%diffinfo) {
6486                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6487         }
6488
6489         # header
6490         if ($format eq 'html') {
6491                 my $formats_nav =
6492                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6493                                 "raw");
6494                 git_header_html(undef, $expires);
6495                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6496                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6497                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6498                 } else {
6499                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6500                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6501                 }
6502                 if (defined $file_name) {
6503                         git_print_page_path($file_name, "blob", $hash_base);
6504                 } else {
6505                         print "<div class=\"page_path\"></div>\n";
6506                 }
6507
6508         } elsif ($format eq 'plain') {
6509                 print $cgi->header(
6510                         -type => 'text/plain',
6511                         -charset => 'utf-8',
6512                         -expires => $expires,
6513                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6514
6515                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6516
6517         } else {
6518                 die_error(400, "Unknown blobdiff format");
6519         }
6520
6521         # patch
6522         if ($format eq 'html') {
6523                 print "<div class=\"page_body\">\n";
6524
6525                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6526                 close $fd;
6527
6528                 print "</div>\n"; # class="page_body"
6529                 git_footer_html();
6530
6531         } else {
6532                 while (my $line = <$fd>) {
6533                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6534                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6535
6536                         print $line;
6537
6538                         last if $line =~ m!^\+\+\+!;
6539                 }
6540                 local $/ = undef;
6541                 print <$fd>;
6542                 close $fd;
6543         }
6544 }
6545
6546 sub git_blobdiff_plain {
6547         git_blobdiff('plain');
6548 }
6549
6550 sub git_commitdiff {
6551         my %params = @_;
6552         my $format = $params{-format} || 'html';
6553
6554         my ($patch_max) = gitweb_get_feature('patches');
6555         if ($format eq 'patch') {
6556                 die_error(403, "Patch view not allowed") unless $patch_max;
6557         }
6558
6559         $hash ||= $hash_base || "HEAD";
6560         my %co = parse_commit($hash)
6561             or die_error(404, "Unknown commit object");
6562
6563         # choose format for commitdiff for merge
6564         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6565                 $hash_parent = '--cc';
6566         }
6567         # we need to prepare $formats_nav before almost any parameter munging
6568         my $formats_nav;
6569         if ($format eq 'html') {
6570                 $formats_nav =
6571                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6572                                 "raw");
6573                 if ($patch_max && @{$co{'parents'}} <= 1) {
6574                         $formats_nav .= " | " .
6575                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6576                                         "patch");
6577                 }
6578
6579                 if (defined $hash_parent &&
6580                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6581                         # commitdiff with two commits given
6582                         my $hash_parent_short = $hash_parent;
6583                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6584                                 $hash_parent_short = substr($hash_parent, 0, 7);
6585                         }
6586                         $formats_nav .=
6587                                 ' (from';
6588                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6589                                 if ($co{'parents'}[$i] eq $hash_parent) {
6590                                         $formats_nav .= ' parent ' . ($i+1);
6591                                         last;
6592                                 }
6593                         }
6594                         $formats_nav .= ': ' .
6595                                 $cgi->a({-href => href(action=>"commitdiff",
6596                                                        hash=>$hash_parent)},
6597                                         esc_html($hash_parent_short)) .
6598                                 ')';
6599                 } elsif (!$co{'parent'}) {
6600                         # --root commitdiff
6601                         $formats_nav .= ' (initial)';
6602                 } elsif (scalar @{$co{'parents'}} == 1) {
6603                         # single parent commit
6604                         $formats_nav .=
6605                                 ' (parent: ' .
6606                                 $cgi->a({-href => href(action=>"commitdiff",
6607                                                        hash=>$co{'parent'})},
6608                                         esc_html(substr($co{'parent'}, 0, 7))) .
6609                                 ')';
6610                 } else {
6611                         # merge commit
6612                         if ($hash_parent eq '--cc') {
6613                                 $formats_nav .= ' | ' .
6614                                         $cgi->a({-href => href(action=>"commitdiff",
6615                                                                hash=>$hash, hash_parent=>'-c')},
6616                                                 'combined');
6617                         } else { # $hash_parent eq '-c'
6618                                 $formats_nav .= ' | ' .
6619                                         $cgi->a({-href => href(action=>"commitdiff",
6620                                                                hash=>$hash, hash_parent=>'--cc')},
6621                                                 'compact');
6622                         }
6623                         $formats_nav .=
6624                                 ' (merge: ' .
6625                                 join(' ', map {
6626                                         $cgi->a({-href => href(action=>"commitdiff",
6627                                                                hash=>$_)},
6628                                                 esc_html(substr($_, 0, 7)));
6629                                 } @{$co{'parents'}} ) .
6630                                 ')';
6631                 }
6632         }
6633
6634         my $hash_parent_param = $hash_parent;
6635         if (!defined $hash_parent_param) {
6636                 # --cc for multiple parents, --root for parentless
6637                 $hash_parent_param =
6638                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6639         }
6640
6641         # read commitdiff
6642         my $fd;
6643         my @difftree;
6644         if ($format eq 'html') {
6645                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6646                         "--no-commit-id", "--patch-with-raw", "--full-index",
6647                         $hash_parent_param, $hash, "--"
6648                         or die_error(500, "Open git-diff-tree failed");
6649
6650                 while (my $line = <$fd>) {
6651                         chomp $line;
6652                         # empty line ends raw part of diff-tree output
6653                         last unless $line;
6654                         push @difftree, scalar parse_difftree_raw_line($line);
6655                 }
6656
6657         } elsif ($format eq 'plain') {
6658                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6659                         '-p', $hash_parent_param, $hash, "--"
6660                         or die_error(500, "Open git-diff-tree failed");
6661         } elsif ($format eq 'patch') {
6662                 # For commit ranges, we limit the output to the number of
6663                 # patches specified in the 'patches' feature.
6664                 # For single commits, we limit the output to a single patch,
6665                 # diverging from the git-format-patch default.
6666                 my @commit_spec = ();
6667                 if ($hash_parent) {
6668                         if ($patch_max > 0) {
6669                                 push @commit_spec, "-$patch_max";
6670                         }
6671                         push @commit_spec, '-n', "$hash_parent..$hash";
6672                 } else {
6673                         if ($params{-single}) {
6674                                 push @commit_spec, '-1';
6675                         } else {
6676                                 if ($patch_max > 0) {
6677                                         push @commit_spec, "-$patch_max";
6678                                 }
6679                                 push @commit_spec, "-n";
6680                         }
6681                         push @commit_spec, '--root', $hash;
6682                 }
6683                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6684                         '--encoding=utf8', '--stdout', @commit_spec
6685                         or die_error(500, "Open git-format-patch failed");
6686         } else {
6687                 die_error(400, "Unknown commitdiff format");
6688         }
6689
6690         # non-textual hash id's can be cached
6691         my $expires;
6692         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6693                 $expires = "+1d";
6694         }
6695
6696         # write commit message
6697         if ($format eq 'html') {
6698                 my $refs = git_get_references();
6699                 my $ref = format_ref_marker($refs, $co{'id'});
6700
6701                 git_header_html(undef, $expires);
6702                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6703                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6704                 print "<div class=\"title_text\">\n" .
6705                       "<table class=\"object_header\">\n";
6706                 git_print_authorship_rows(\%co);
6707                 print "</table>".
6708                       "</div>\n";
6709                 print "<div class=\"page_body\">\n";
6710                 if (@{$co{'comment'}} > 1) {
6711                         print "<div class=\"log\">\n";
6712                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6713                         print "</div>\n"; # class="log"
6714                 }
6715
6716         } elsif ($format eq 'plain') {
6717                 my $refs = git_get_references("tags");
6718                 my $tagname = git_get_rev_name_tags($hash);
6719                 my $filename = basename($project) . "-$hash.patch";
6720
6721                 print $cgi->header(
6722                         -type => 'text/plain',
6723                         -charset => 'utf-8',
6724                         -expires => $expires,
6725                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6726                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6727                 print "From: " . to_utf8($co{'author'}) . "\n";
6728                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6729                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6730
6731                 print "X-Git-Tag: $tagname\n" if $tagname;
6732                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6733
6734                 foreach my $line (@{$co{'comment'}}) {
6735                         print to_utf8($line) . "\n";
6736                 }
6737                 print "---\n\n";
6738         } elsif ($format eq 'patch') {
6739                 my $filename = basename($project) . "-$hash.patch";
6740
6741                 print $cgi->header(
6742                         -type => 'text/plain',
6743                         -charset => 'utf-8',
6744                         -expires => $expires,
6745                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6746         }
6747
6748         # write patch
6749         if ($format eq 'html') {
6750                 my $use_parents = !defined $hash_parent ||
6751                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6752                 git_difftree_body(\@difftree, $hash,
6753                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6754                 print "<br/>\n";
6755
6756                 git_patchset_body($fd, \@difftree, $hash,
6757                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6758                 close $fd;
6759                 print "</div>\n"; # class="page_body"
6760                 git_footer_html();
6761
6762         } elsif ($format eq 'plain') {
6763                 local $/ = undef;
6764                 print <$fd>;
6765                 close $fd
6766                         or print "Reading git-diff-tree failed\n";
6767         } elsif ($format eq 'patch') {
6768                 local $/ = undef;
6769                 print <$fd>;
6770                 close $fd
6771                         or print "Reading git-format-patch failed\n";
6772         }
6773 }
6774
6775 sub git_commitdiff_plain {
6776         git_commitdiff(-format => 'plain');
6777 }
6778
6779 # format-patch-style patches
6780 sub git_patch {
6781         git_commitdiff(-format => 'patch', -single => 1);
6782 }
6783
6784 sub git_patches {
6785         git_commitdiff(-format => 'patch');
6786 }
6787
6788 sub git_history {
6789         git_log_generic('history', \&git_history_body,
6790                         $hash_base, $hash_parent_base,
6791                         $file_name, $hash);
6792 }
6793
6794 sub git_search {
6795         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6796         if (!defined $searchtext) {
6797                 die_error(400, "Text field is empty");
6798         }
6799         if (!defined $hash) {
6800                 $hash = git_get_head_hash($project);
6801         }
6802         my %co = parse_commit($hash);
6803         if (!%co) {
6804                 die_error(404, "Unknown commit object");
6805         }
6806         if (!defined $page) {
6807                 $page = 0;
6808         }
6809
6810         $searchtype ||= 'commit';
6811         if ($searchtype eq 'pickaxe') {
6812                 # pickaxe may take all resources of your box and run for several minutes
6813                 # with every query - so decide by yourself how public you make this feature
6814                 gitweb_check_feature('pickaxe')
6815                     or die_error(403, "Pickaxe is disabled");
6816         }
6817         if ($searchtype eq 'grep') {
6818                 gitweb_check_feature('grep')
6819                     or die_error(403, "Grep is disabled");
6820         }
6821
6822         git_header_html();
6823
6824         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6825                 my $greptype;
6826                 if ($searchtype eq 'commit') {
6827                         $greptype = "--grep=";
6828                 } elsif ($searchtype eq 'author') {
6829                         $greptype = "--author=";
6830                 } elsif ($searchtype eq 'committer') {
6831                         $greptype = "--committer=";
6832                 }
6833                 $greptype .= $searchtext;
6834                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6835                                                $greptype, '--regexp-ignore-case',
6836                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6837
6838                 my $paging_nav = '';
6839                 if ($page > 0) {
6840                         $paging_nav .=
6841                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6842                                                        searchtext=>$searchtext,
6843                                                        searchtype=>$searchtype)},
6844                                         "first");
6845                         $paging_nav .= " &sdot; " .
6846                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6847                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6848                 } else {
6849                         $paging_nav .= "first";
6850                         $paging_nav .= " &sdot; prev";
6851                 }
6852                 my $next_link = '';
6853                 if ($#commitlist >= 100) {
6854                         $next_link =
6855                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6856                                          -accesskey => "n", -title => "Alt-n"}, "next");
6857                         $paging_nav .= " &sdot; $next_link";
6858                 } else {
6859                         $paging_nav .= " &sdot; next";
6860                 }
6861
6862                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6863                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6864                 if ($page == 0 && !@commitlist) {
6865                         print "<p>No match.</p>\n";
6866                 } else {
6867                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6868                 }
6869         }
6870
6871         if ($searchtype eq 'pickaxe') {
6872                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6873                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6874
6875                 print "<table class=\"pickaxe search\">\n";
6876                 my $alternate = 1;
6877                 local $/ = "\n";
6878                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6879                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6880                         ($search_use_regexp ? '--pickaxe-regex' : ());
6881                 undef %co;
6882                 my @files;
6883                 while (my $line = <$fd>) {
6884                         chomp $line;
6885                         next unless $line;
6886
6887                         my %set = parse_difftree_raw_line($line);
6888                         if (defined $set{'commit'}) {
6889                                 # finish previous commit
6890                                 if (%co) {
6891                                         print "</td>\n" .
6892                                               "<td class=\"link\">" .
6893                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6894                                               " | " .
6895                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6896                                         print "</td>\n" .
6897                                               "</tr>\n";
6898                                 }
6899
6900                                 if ($alternate) {
6901                                         print "<tr class=\"dark\">\n";
6902                                 } else {
6903                                         print "<tr class=\"light\">\n";
6904                                 }
6905                                 $alternate ^= 1;
6906                                 %co = parse_commit($set{'commit'});
6907                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6908                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6909                                       "<td><i>$author</i></td>\n" .
6910                                       "<td>" .
6911                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6912                                               -class => "list subject"},
6913                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6914                         } elsif (defined $set{'to_id'}) {
6915                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6916
6917                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6918                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6919                                               -class => "list"},
6920                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6921                                       "<br/>\n";
6922                         }
6923                 }
6924                 close $fd;
6925
6926                 # finish last commit (warning: repetition!)
6927                 if (%co) {
6928                         print "</td>\n" .
6929                               "<td class=\"link\">" .
6930                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6931                               " | " .
6932                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6933                         print "</td>\n" .
6934                               "</tr>\n";
6935                 }
6936
6937                 print "</table>\n";
6938         }
6939
6940         if ($searchtype eq 'grep') {
6941                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6942                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6943
6944                 print "<table class=\"grep_search\">\n";
6945                 my $alternate = 1;
6946                 my $matches = 0;
6947                 local $/ = "\n";
6948                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6949                         $search_use_regexp ? ('-E', '-i') : '-F',
6950                         $searchtext, $co{'tree'};
6951                 my $lastfile = '';
6952                 while (my $line = <$fd>) {
6953                         chomp $line;
6954                         my ($file, $lno, $ltext, $binary);
6955                         last if ($matches++ > 1000);
6956                         if ($line =~ /^Binary file (.+) matches$/) {
6957                                 $file = $1;
6958                                 $binary = 1;
6959                         } else {
6960                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6961                         }
6962                         if ($file ne $lastfile) {
6963                                 $lastfile and print "</td></tr>\n";
6964                                 if ($alternate++) {
6965                                         print "<tr class=\"dark\">\n";
6966                                 } else {
6967                                         print "<tr class=\"light\">\n";
6968                                 }
6969                                 print "<td class=\"list\">".
6970                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6971                                                                file_name=>"$file"),
6972                                                 -class => "list"}, esc_path($file));
6973                                 print "</td><td>\n";
6974                                 $lastfile = $file;
6975                         }
6976                         if ($binary) {
6977                                 print "<div class=\"binary\">Binary file</div>\n";
6978                         } else {
6979                                 $ltext = untabify($ltext);
6980                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6981                                         $ltext = esc_html($1, -nbsp=>1);
6982                                         $ltext .= '<span class="match">';
6983                                         $ltext .= esc_html($2, -nbsp=>1);
6984                                         $ltext .= '</span>';
6985                                         $ltext .= esc_html($3, -nbsp=>1);
6986                                 } else {
6987                                         $ltext = esc_html($ltext, -nbsp=>1);
6988                                 }
6989                                 print "<div class=\"pre\">" .
6990                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6991                                                                file_name=>"$file").'#l'.$lno,
6992                                                 -class => "linenr"}, sprintf('%4i', $lno))
6993                                         . ' ' .  $ltext . "</div>\n";
6994                         }
6995                 }
6996                 if ($lastfile) {
6997                         print "</td></tr>\n";
6998                         if ($matches > 1000) {
6999                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7000                         }
7001                 } else {
7002                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7003                 }
7004                 close $fd;
7005
7006                 print "</table>\n";
7007         }
7008         git_footer_html();
7009 }
7010
7011 sub git_search_help {
7012         git_header_html();
7013         git_print_page_nav('','', $hash,$hash,$hash);
7014         print <<EOT;
7015 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7016 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7017 the pattern entered is recognized as the POSIX extended
7018 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7019 insensitive).</p>
7020 <dl>
7021 <dt><b>commit</b></dt>
7022 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7023 EOT
7024         my $have_grep = gitweb_check_feature('grep');
7025         if ($have_grep) {
7026                 print <<EOT;
7027 <dt><b>grep</b></dt>
7028 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7029     a different one) are searched for the given pattern. On large trees, this search can take
7030 a while and put some strain on the server, so please use it with some consideration. Note that
7031 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7032 case-sensitive.</dd>
7033 EOT
7034         }
7035         print <<EOT;
7036 <dt><b>author</b></dt>
7037 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7038 <dt><b>committer</b></dt>
7039 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7040 EOT
7041         my $have_pickaxe = gitweb_check_feature('pickaxe');
7042         if ($have_pickaxe) {
7043                 print <<EOT;
7044 <dt><b>pickaxe</b></dt>
7045 <dd>All commits that caused the string to appear or disappear from any file (changes that
7046 added, removed or "modified" the string) will be listed. This search can take a while and
7047 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7048 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7049 EOT
7050         }
7051         print "</dl>\n";
7052         git_footer_html();
7053 }
7054
7055 sub git_shortlog {
7056         git_log_generic('shortlog', \&git_shortlog_body,
7057                         $hash, $hash_parent);
7058 }
7059
7060 ## ......................................................................
7061 ## feeds (RSS, Atom; OPML)
7062
7063 sub git_feed {
7064         my $format = shift || 'atom';
7065         my $have_blame = gitweb_check_feature('blame');
7066
7067         # Atom: http://www.atomenabled.org/developers/syndication/
7068         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7069         if ($format ne 'rss' && $format ne 'atom') {
7070                 die_error(400, "Unknown web feed format");
7071         }
7072
7073         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7074         my $head = $hash || 'HEAD';
7075         my @commitlist = parse_commits($head, 150, 0, $file_name);
7076
7077         my %latest_commit;
7078         my %latest_date;
7079         my $content_type = "application/$format+xml";
7080         if (defined $cgi->http('HTTP_ACCEPT') &&
7081                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7082                 # browser (feed reader) prefers text/xml
7083                 $content_type = 'text/xml';
7084         }
7085         if (defined($commitlist[0])) {
7086                 %latest_commit = %{$commitlist[0]};
7087                 my $latest_epoch = $latest_commit{'committer_epoch'};
7088                 %latest_date   = parse_date($latest_epoch);
7089                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7090                 if (defined $if_modified) {
7091                         my $since;
7092                         if (eval { require HTTP::Date; 1; }) {
7093                                 $since = HTTP::Date::str2time($if_modified);
7094                         } elsif (eval { require Time::ParseDate; 1; }) {
7095                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7096                         }
7097                         if (defined $since && $latest_epoch <= $since) {
7098                                 print $cgi->header(
7099                                         -type => $content_type,
7100                                         -charset => 'utf-8',
7101                                         -last_modified => $latest_date{'rfc2822'},
7102                                         -status => '304 Not Modified');
7103                                 return;
7104                         }
7105                 }
7106                 print $cgi->header(
7107                         -type => $content_type,
7108                         -charset => 'utf-8',
7109                         -last_modified => $latest_date{'rfc2822'});
7110         } else {
7111                 print $cgi->header(
7112                         -type => $content_type,
7113                         -charset => 'utf-8');
7114         }
7115
7116         # Optimization: skip generating the body if client asks only
7117         # for Last-Modified date.
7118         return if ($cgi->request_method() eq 'HEAD');
7119
7120         # header variables
7121         my $title = "$site_name - $project/$action";
7122         my $feed_type = 'log';
7123         if (defined $hash) {
7124                 $title .= " - '$hash'";
7125                 $feed_type = 'branch log';
7126                 if (defined $file_name) {
7127                         $title .= " :: $file_name";
7128                         $feed_type = 'history';
7129                 }
7130         } elsif (defined $file_name) {
7131                 $title .= " - $file_name";
7132                 $feed_type = 'history';
7133         }
7134         $title .= " $feed_type";
7135         my $descr = git_get_project_description($project);
7136         if (defined $descr) {
7137                 $descr = esc_html($descr);
7138         } else {
7139                 $descr = "$project " .
7140                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7141                          " feed";
7142         }
7143         my $owner = git_get_project_owner($project);
7144         $owner = esc_html($owner);
7145
7146         #header
7147         my $alt_url;
7148         if (defined $file_name) {
7149                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7150         } elsif (defined $hash) {
7151                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7152         } else {
7153                 $alt_url = href(-full=>1, action=>"summary");
7154         }
7155         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7156         if ($format eq 'rss') {
7157                 print <<XML;
7158 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7159 <channel>
7160 XML
7161                 print "<title>$title</title>\n" .
7162                       "<link>$alt_url</link>\n" .
7163                       "<description>$descr</description>\n" .
7164                       "<language>en</language>\n" .
7165                       # project owner is responsible for 'editorial' content
7166                       "<managingEditor>$owner</managingEditor>\n";
7167                 if (defined $logo || defined $favicon) {
7168                         # prefer the logo to the favicon, since RSS
7169                         # doesn't allow both
7170                         my $img = esc_url($logo || $favicon);
7171                         print "<image>\n" .
7172                               "<url>$img</url>\n" .
7173                               "<title>$title</title>\n" .
7174                               "<link>$alt_url</link>\n" .
7175                               "</image>\n";
7176                 }
7177                 if (%latest_date) {
7178                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7179                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7180                 }
7181                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7182         } elsif ($format eq 'atom') {
7183                 print <<XML;
7184 <feed xmlns="http://www.w3.org/2005/Atom">
7185 XML
7186                 print "<title>$title</title>\n" .
7187                       "<subtitle>$descr</subtitle>\n" .
7188                       '<link rel="alternate" type="text/html" href="' .
7189                       $alt_url . '" />' . "\n" .
7190                       '<link rel="self" type="' . $content_type . '" href="' .
7191                       $cgi->self_url() . '" />' . "\n" .
7192                       "<id>" . href(-full=>1) . "</id>\n" .
7193                       # use project owner for feed author
7194                       "<author><name>$owner</name></author>\n";
7195                 if (defined $favicon) {
7196                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7197                 }
7198                 if (defined $logo) {
7199                         # not twice as wide as tall: 72 x 27 pixels
7200                         print "<logo>" . esc_url($logo) . "</logo>\n";
7201                 }
7202                 if (! %latest_date) {
7203                         # dummy date to keep the feed valid until commits trickle in:
7204                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7205                 } else {
7206                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7207                 }
7208                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7209         }
7210
7211         # contents
7212         for (my $i = 0; $i <= $#commitlist; $i++) {
7213                 my %co = %{$commitlist[$i]};
7214                 my $commit = $co{'id'};
7215                 # we read 150, we always show 30 and the ones more recent than 48 hours
7216                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7217                         last;
7218                 }
7219                 my %cd = parse_date($co{'author_epoch'});
7220
7221                 # get list of changed files
7222                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7223                         $co{'parent'} || "--root",
7224                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7225                         or next;
7226                 my @difftree = map { chomp; $_ } <$fd>;
7227                 close $fd
7228                         or next;
7229
7230                 # print element (entry, item)
7231                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7232                 if ($format eq 'rss') {
7233                         print "<item>\n" .
7234                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7235                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7236                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7237                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7238                               "<link>$co_url</link>\n" .
7239                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7240                               "<content:encoded>" .
7241                               "<![CDATA[\n";
7242                 } elsif ($format eq 'atom') {
7243                         print "<entry>\n" .
7244                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7245                               "<updated>$cd{'iso-8601'}</updated>\n" .
7246                               "<author>\n" .
7247                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7248                         if ($co{'author_email'}) {
7249                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7250                         }
7251                         print "</author>\n" .
7252                               # use committer for contributor
7253                               "<contributor>\n" .
7254                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7255                         if ($co{'committer_email'}) {
7256                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7257                         }
7258                         print "</contributor>\n" .
7259                               "<published>$cd{'iso-8601'}</published>\n" .
7260                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7261                               "<id>$co_url</id>\n" .
7262                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7263                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7264                 }
7265                 my $comment = $co{'comment'};
7266                 print "<pre>\n";
7267                 foreach my $line (@$comment) {
7268                         $line = esc_html($line);
7269                         print "$line\n";
7270                 }
7271                 print "</pre><ul>\n";
7272                 foreach my $difftree_line (@difftree) {
7273                         my %difftree = parse_difftree_raw_line($difftree_line);
7274                         next if !$difftree{'from_id'};
7275
7276                         my $file = $difftree{'file'} || $difftree{'to_file'};
7277
7278                         print "<li>" .
7279                               "[" .
7280                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7281                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7282                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7283                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7284                                       -title => "diff"}, 'D');
7285                         if ($have_blame) {
7286                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7287                                                              file_name=>$file, hash_base=>$commit),
7288                                               -title => "blame"}, 'B');
7289                         }
7290                         # if this is not a feed of a file history
7291                         if (!defined $file_name || $file_name ne $file) {
7292                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7293                                                              file_name=>$file, hash=>$commit),
7294                                               -title => "history"}, 'H');
7295                         }
7296                         $file = esc_path($file);
7297                         print "] ".
7298                               "$file</li>\n";
7299                 }
7300                 if ($format eq 'rss') {
7301                         print "</ul>]]>\n" .
7302                               "</content:encoded>\n" .
7303                               "</item>\n";
7304                 } elsif ($format eq 'atom') {
7305                         print "</ul>\n</div>\n" .
7306                               "</content>\n" .
7307                               "</entry>\n";
7308                 }
7309         }
7310
7311         # end of feed
7312         if ($format eq 'rss') {
7313                 print "</channel>\n</rss>\n";
7314         } elsif ($format eq 'atom') {
7315                 print "</feed>\n";
7316         }
7317 }
7318
7319 sub git_rss {
7320         git_feed('rss');
7321 }
7322
7323 sub git_atom {
7324         git_feed('atom');
7325 }
7326
7327 sub git_opml {
7328         my @list = git_get_projects_list();
7329
7330         print $cgi->header(
7331                 -type => 'text/xml',
7332                 -charset => 'utf-8',
7333                 -content_disposition => 'inline; filename="opml.xml"');
7334
7335         print <<XML;
7336 <?xml version="1.0" encoding="utf-8"?>
7337 <opml version="1.0">
7338 <head>
7339   <title>$site_name OPML Export</title>
7340 </head>
7341 <body>
7342 <outline text="git RSS feeds">
7343 XML
7344
7345         foreach my $pr (@list) {
7346                 my %proj = %$pr;
7347                 my $head = git_get_head_hash($proj{'path'});
7348                 if (!defined $head) {
7349                         next;
7350                 }
7351                 $git_dir = "$projectroot/$proj{'path'}";
7352                 my %co = parse_commit($head);
7353                 if (!%co) {
7354                         next;
7355                 }
7356
7357                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7358                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7359                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7360                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7361         }
7362         print <<XML;
7363 </outline>
7364 </body>
7365 </opml>
7366 XML
7367 }