git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

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