Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # group projects by category on the projects list
 120 # (enabled if this variable evaluates to true)
 121 our $projects_list_group_categories = 0;
 122
 123 # default category if none specified
 124 # (leave the empty string for no category)
 125 our $project_list_default_category = "";
 126
 127 # default order of projects list
 128 # valid values are none, project, descr, owner, and age
 129 our $default_projects_order = "project";
 130
 131 # show repository only if this file exists
 132 # (only effective if this variable evaluates to true)
 133 our $export_ok = "++GITWEB_EXPORT_OK++";
 134
 135 # show repository only if this subroutine returns true
 136 # when given the path to the project, for example:
 137 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 138 our $export_auth_hook = undef;
 139
 140 # only allow viewing of repositories also shown on the overview page
 141 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 142
 143 # list of git base URLs used for URL to where fetch project from,
 144 # i.e. full URL is "$git_base_url/$project"
 145 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 146
 147 # default blob_plain mimetype and default charset for text/plain blob
 148 our $default_blob_plain_mimetype = 'text/plain';
 149 our $default_text_plain_charset  = undef;
 150
 151 # file to use for guessing MIME types before trying /etc/mime.types
 152 # (relative to the current git repository)
 153 our $mimetypes_file = undef;
 154
 155 # assume this charset if line contains non-UTF-8 characters;
 156 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 157 # for which encoding all byte sequences are valid, for example
 158 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 159 # could be even 'utf-8' for the old behavior)
 160 our $fallback_encoding = 'latin1';
 161
 162 # rename detection options for git-diff and git-diff-tree
 163 # - default is '-M', with the cost proportional to
 164 #   (number of removed files) * (number of new files).
 165 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 166 #   (number of changed files + number of removed files) * (number of new files)
 167 # - even more costly is '-C', '--find-copies-harder' with cost
 168 #   (number of files in the original tree) * (number of new files)
 169 # - one might want to include '-B' option, e.g. '-B', '-M'
 170 our @diff_opts = ('-M'); # taken from git_commit
 171
 172 # Disables features that would allow repository owners to inject script into
 173 # the gitweb domain.
 174 our $prevent_xss = 0;
 175
 176 # Path to the highlight executable to use (must be the one from
 177 # http://www.andre-simon.de due to assumptions about parameters and output).
 178 # Useful if highlight is not installed on your webserver's PATH.
 179 # [Default: highlight]
 180 our $highlight_bin = "++HIGHLIGHT_BIN++";
 181
 182 # information about snapshot formats that gitweb is capable of serving
 183 our %known_snapshot_formats = (
 184         # name => {
 185         #       'display' => display name,
 186         #       'type' => mime type,
 187         #       'suffix' => filename suffix,
 188         #       'format' => --format for git-archive,
 189         #       'compressor' => [compressor command and arguments]
 190         #                       (array reference, optional)
 191         #       'disabled' => boolean (optional)}
 192         #
 193         'tgz' => {
 194                 'display' => 'tar.gz',
 195                 'type' => 'application/x-gzip',
 196                 'suffix' => '.tar.gz',
 197                 'format' => 'tar',
 198                 'compressor' => ['gzip', '-n']},
 199
 200         'tbz2' => {
 201                 'display' => 'tar.bz2',
 202                 'type' => 'application/x-bzip2',
 203                 'suffix' => '.tar.bz2',
 204                 'format' => 'tar',
 205                 'compressor' => ['bzip2']},
 206
 207         'txz' => {
 208                 'display' => 'tar.xz',
 209                 'type' => 'application/x-xz',
 210                 'suffix' => '.tar.xz',
 211                 'format' => 'tar',
 212                 'compressor' => ['xz'],
 213                 'disabled' => 1},
 214
 215         'zip' => {
 216                 'display' => 'zip',
 217                 'type' => 'application/x-zip',
 218                 'suffix' => '.zip',
 219                 'format' => 'zip'},
 220 );
 221
 222 # Aliases so we understand old gitweb.snapshot values in repository
 223 # configuration.
 224 our %known_snapshot_format_aliases = (
 225         'gzip'  => 'tgz',
 226         'bzip2' => 'tbz2',
 227         'xz'    => 'txz',
 228
 229         # backward compatibility: legacy gitweb config support
 230         'x-gzip' => undef, 'gz' => undef,
 231         'x-bzip2' => undef, 'bz2' => undef,
 232         'x-zip' => undef, '' => undef,
 233 );
 234
 235 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 236 # are changed, it may be appropriate to change these values too via
 237 # $GITWEB_CONFIG.
 238 our %avatar_size = (
 239         'default' => 16,
 240         'double'  => 32
 241 );
 242
 243 # Used to set the maximum load that we will still respond to gitweb queries.
 244 # If server load exceed this value then return "503 server busy" error.
 245 # If gitweb cannot determined server load, it is taken to be 0.
 246 # Leave it undefined (or set to 'undef') to turn off load checking.
 247 our $maxload = 300;
 248
 249 # configuration for 'highlight' (http://www.andre-simon.de/)
 250 # match by basename
 251 our %highlight_basename = (
 252         #'Program' => 'py',
 253         #'Library' => 'py',
 254         'SConstruct' => 'py', # SCons equivalent of Makefile
 255         'Makefile' => 'make',
 256 );
 257 # match by extension
 258 our %highlight_ext = (
 259         # main extensions, defining name of syntax;
 260         # see files in /usr/share/highlight/langDefs/ directory
 261         map { $_ => $_ }
 262                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 263         # alternate extensions, see /etc/highlight/filetypes.conf
 264         'h' => 'c',
 265         map { $_ => 'sh'  } qw(bash zsh ksh),
 266         map { $_ => 'cpp' } qw(cxx c++ cc),
 267         map { $_ => 'php' } qw(php3 php4 php5 phps),
 268         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 269         map { $_ => 'make'} qw(mak mk),
 270         map { $_ => 'xml' } qw(xhtml html htm),
 271 );
 272
 273 # You define site-wide feature defaults here; override them with
 274 # $GITWEB_CONFIG as necessary.
 275 our %feature = (
 276         # feature => {
 277         #       'sub' => feature-sub (subroutine),
 278         #       'override' => allow-override (boolean),
 279         #       'default' => [ default options...] (array reference)}
 280         #
 281         # if feature is overridable (it means that allow-override has true value),
 282         # then feature-sub will be called with default options as parameters;
 283         # return value of feature-sub indicates if to enable specified feature
 284         #
 285         # if there is no 'sub' key (no feature-sub), then feature cannot be
 286         # overridden
 287         #
 288         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 289         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 290         # is enabled
 291
 292         # Enable the 'blame' blob view, showing the last commit that modified
 293         # each line in the file. This can be very CPU-intensive.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'blame'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'blame'}{'override'} = 1;
 299         # and in project config gitweb.blame = 0|1;
 300         'blame' => {
 301                 'sub' => sub { feature_bool('blame', @_) },
 302                 'override' => 0,
 303                 'default' => [0]},
 304
 305         # Enable the 'snapshot' link, providing a compressed archive of any
 306         # tree. This can potentially generate high traffic if you have large
 307         # project.
 308
 309         # Value is a list of formats defined in %known_snapshot_formats that
 310         # you wish to offer.
 311         # To disable system wide have in $GITWEB_CONFIG
 312         # $feature{'snapshot'}{'default'} = [];
 313         # To have project specific config enable override in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'override'} = 1;
 315         # and in project config, a comma-separated list of formats or "none"
 316         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 317         'snapshot' => {
 318                 'sub' => \&feature_snapshot,
 319                 'override' => 0,
 320                 'default' => ['tgz']},
 321
 322         # Enable text search, which will list the commits which match author,
 323         # committer or commit text to a given string.  Enabled by default.
 324         # Project specific override is not supported.
 325         'search' => {
 326                 'override' => 0,
 327                 'default' => [1]},
 328
 329         # Enable grep search, which will list the files in currently selected
 330         # tree containing the given string. Enabled by default. This can be
 331         # potentially CPU-intensive, of course.
 332
 333         # To enable system wide have in $GITWEB_CONFIG
 334         # $feature{'grep'}{'default'} = [1];
 335         # To have project specific config enable override in $GITWEB_CONFIG
 336         # $feature{'grep'}{'override'} = 1;
 337         # and in project config gitweb.grep = 0|1;
 338         'grep' => {
 339                 'sub' => sub { feature_bool('grep', @_) },
 340                 'override' => 0,
 341                 'default' => [1]},
 342
 343         # Enable the pickaxe search, which will list the commits that modified
 344         # a given string in a file. This can be practical and quite faster
 345         # alternative to 'blame', but still potentially CPU-intensive.
 346
 347         # To enable system wide have in $GITWEB_CONFIG
 348         # $feature{'pickaxe'}{'default'} = [1];
 349         # To have project specific config enable override in $GITWEB_CONFIG
 350         # $feature{'pickaxe'}{'override'} = 1;
 351         # and in project config gitweb.pickaxe = 0|1;
 352         'pickaxe' => {
 353                 'sub' => sub { feature_bool('pickaxe', @_) },
 354                 'override' => 0,
 355                 'default' => [1]},
 356
 357         # Enable showing size of blobs in a 'tree' view, in a separate
 358         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 359
 360         # To disable system wide have in $GITWEB_CONFIG
 361         # $feature{'show-sizes'}{'default'} = [0];
 362         # To have project specific config enable override in $GITWEB_CONFIG
 363         # $feature{'show-sizes'}{'override'} = 1;
 364         # and in project config gitweb.showsizes = 0|1;
 365         'show-sizes' => {
 366                 'sub' => sub { feature_bool('showsizes', @_) },
 367                 'override' => 0,
 368                 'default' => [1]},
 369
 370         # Make gitweb use an alternative format of the URLs which can be
 371         # more readable and natural-looking: project name is embedded
 372         # directly in the path and the query string contains other
 373         # auxiliary information. All gitweb installations recognize
 374         # URL in either format; this configures in which formats gitweb
 375         # generates links.
 376
 377         # To enable system wide have in $GITWEB_CONFIG
 378         # $feature{'pathinfo'}{'default'} = [1];
 379         # Project specific override is not supported.
 380
 381         # Note that you will need to change the default location of CSS,
 382         # favicon, logo and possibly other files to an absolute URL. Also,
 383         # if gitweb.cgi serves as your indexfile, you will need to force
 384         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 385         'pathinfo' => {
 386                 'override' => 0,
 387                 'default' => [0]},
 388
 389         # Make gitweb consider projects in project root subdirectories
 390         # to be forks of existing projects. Given project $projname.git,
 391         # projects matching $projname/*.git will not be shown in the main
 392         # projects list, instead a '+' mark will be added to $projname
 393         # there and a 'forks' view will be enabled for the project, listing
 394         # all the forks. If project list is taken from a file, forks have
 395         # to be listed after the main project.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'forks'}{'default'} = [1];
 399         # Project specific override is not supported.
 400         'forks' => {
 401                 'override' => 0,
 402                 'default' => [0]},
 403
 404         # Insert custom links to the action bar of all project pages.
 405         # This enables you mainly to link to third-party scripts integrating
 406         # into gitweb; e.g. git-browser for graphical history representation
 407         # or custom web-based repository administration interface.
 408
 409         # The 'default' value consists of a list of triplets in the form
 410         # (label, link, position) where position is the label after which
 411         # to insert the link and link is a format string where %n expands
 412         # to the project name, %f to the project path within the filesystem,
 413         # %h to the current hash (h gitweb parameter) and %b to the current
 414         # hash base (hb gitweb parameter); %% expands to %.
 415
 416         # To enable system wide have in $GITWEB_CONFIG e.g.
 417         # $feature{'actions'}{'default'} = [('graphiclog',
 418         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 419         # Project specific override is not supported.
 420         'actions' => {
 421                 'override' => 0,
 422                 'default' => []},
 423
 424         # Allow gitweb scan project content tags of project repository,
 425         # and display the popular Web 2.0-ish "tag cloud" near the projects
 426         # list.  Note that this is something COMPLETELY different from the
 427         # normal Git tags.
 428
 429         # gitweb by itself can show existing tags, but it does not handle
 430         # tagging itself; you need to do it externally, outside gitweb.
 431         # The format is described in git_get_project_ctags() subroutine.
 432         # You may want to install the HTML::TagCloud Perl module to get
 433         # a pretty tag cloud instead of just a list of tags.
 434
 435         # To enable system wide have in $GITWEB_CONFIG
 436         # $feature{'ctags'}{'default'} = [1];
 437         # Project specific override is not supported.
 438
 439         # In the future whether ctags editing is enabled might depend
 440         # on the value, but using 1 should always mean no editing of ctags.
 441         'ctags' => {
 442                 'override' => 0,
 443                 'default' => [0]},
 444
 445         # The maximum number of patches in a patchset generated in patch
 446         # view. Set this to 0 or undef to disable patch view, or to a
 447         # negative number to remove any limit.
 448
 449         # To disable system wide have in $GITWEB_CONFIG
 450         # $feature{'patches'}{'default'} = [0];
 451         # To have project specific config enable override in $GITWEB_CONFIG
 452         # $feature{'patches'}{'override'} = 1;
 453         # and in project config gitweb.patches = 0|n;
 454         # where n is the maximum number of patches allowed in a patchset.
 455         'patches' => {
 456                 'sub' => \&feature_patches,
 457                 'override' => 0,
 458                 'default' => [16]},
 459
 460         # Avatar support. When this feature is enabled, views such as
 461         # shortlog or commit will display an avatar associated with
 462         # the email of the committer(s) and/or author(s).
 463
 464         # Currently available providers are gravatar and picon.
 465         # If an unknown provider is specified, the feature is disabled.
 466
 467         # Gravatar depends on Digest::MD5.
 468         # Picon currently relies on the indiana.edu database.
 469
 470         # To enable system wide have in $GITWEB_CONFIG
 471         # $feature{'avatar'}{'default'} = ['<provider>'];
 472         # where <provider> is either gravatar or picon.
 473         # To have project specific config enable override in $GITWEB_CONFIG
 474         # $feature{'avatar'}{'override'} = 1;
 475         # and in project config gitweb.avatar = <provider>;
 476         'avatar' => {
 477                 'sub' => \&feature_avatar,
 478                 'override' => 0,
 479                 'default' => ['']},
 480
 481         # Enable displaying how much time and how many git commands
 482         # it took to generate and display page.  Disabled by default.
 483         # Project specific override is not supported.
 484         'timed' => {
 485                 'override' => 0,
 486                 'default' => [0]},
 487
 488         # Enable turning some links into links to actions which require
 489         # JavaScript to run (like 'blame_incremental').  Not enabled by
 490         # default.  Project specific override is currently not supported.
 491         'javascript-actions' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Syntax highlighting support. This is based on Daniel Svensson's
 496         # and Sham Chukoury's work in gitweb-xmms2.git.
 497         # It requires the 'highlight' program present in $PATH,
 498         # and therefore is disabled by default.
 499
 500         # To enable system wide have in $GITWEB_CONFIG
 501         # $feature{'highlight'}{'default'} = [1];
 502
 503         'highlight' => {
 504                 'sub' => sub { feature_bool('highlight', @_) },
 505                 'override' => 0,
 506                 'default' => [0]},
 507
 508         # Enable displaying of remote heads in the heads list
 509
 510         # To enable system wide have in $GITWEB_CONFIG
 511         # $feature{'remote_heads'}{'default'} = [1];
 512         # To have project specific config enable override in $GITWEB_CONFIG
 513         # $feature{'remote_heads'}{'override'} = 1;
 514         # and in project config gitweb.remote_heads = 0|1;
 515         'remote_heads' => {
 516                 'sub' => sub { feature_bool('remote_heads', @_) },
 517                 'override' => 0,
 518                 'default' => [0]},
 519 );
 520
 521 sub gitweb_get_feature {
 522         my ($name) = @_;
 523         return unless exists $feature{$name};
 524         my ($sub, $override, @defaults) = (
 525                 $feature{$name}{'sub'},
 526                 $feature{$name}{'override'},
 527                 @{$feature{$name}{'default'}});
 528         # project specific override is possible only if we have project
 529         our $git_dir; # global variable, declared later
 530         if (!$override || !defined $git_dir) {
 531                 return @defaults;
 532         }
 533         if (!defined $sub) {
 534                 warn "feature $name is not overridable";
 535                 return @defaults;
 536         }
 537         return $sub->(@defaults);
 538 }
 539
 540 # A wrapper to check if a given feature is enabled.
 541 # With this, you can say
 542 #
 543 #   my $bool_feat = gitweb_check_feature('bool_feat');
 544 #   gitweb_check_feature('bool_feat') or somecode;
 545 #
 546 # instead of
 547 #
 548 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 549 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 550 #
 551 sub gitweb_check_feature {
 552         return (gitweb_get_feature(@_))[0];
 553 }
 554
 555
 556 sub feature_bool {
 557         my $key = shift;
 558         my ($val) = git_get_project_config($key, '--bool');
 559
 560         if (!defined $val) {
 561                 return ($_[0]);
 562         } elsif ($val eq 'true') {
 563                 return (1);
 564         } elsif ($val eq 'false') {
 565                 return (0);
 566         }
 567 }
 568
 569 sub feature_snapshot {
 570         my (@fmts) = @_;
 571
 572         my ($val) = git_get_project_config('snapshot');
 573
 574         if ($val) {
 575                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 576         }
 577
 578         return @fmts;
 579 }
 580
 581 sub feature_patches {
 582         my @val = (git_get_project_config('patches', '--int'));
 583
 584         if (@val) {
 585                 return @val;
 586         }
 587
 588         return ($_[0]);
 589 }
 590
 591 sub feature_avatar {
 592         my @val = (git_get_project_config('avatar'));
 593
 594         return @val ? @val : @_;
 595 }
 596
 597 # checking HEAD file with -e is fragile if the repository was
 598 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 599 # and then pruned.
 600 sub check_head_link {
 601         my ($dir) = @_;
 602         my $headfile = "$dir/HEAD";
 603         return ((-e $headfile) ||
 604                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 605 }
 606
 607 sub check_export_ok {
 608         my ($dir) = @_;
 609         return (check_head_link($dir) &&
 610                 (!$export_ok || -e "$dir/$export_ok") &&
 611                 (!$export_auth_hook || $export_auth_hook->($dir)));
 612 }
 613
 614 # process alternate names for backward compatibility
 615 # filter out unsupported (unknown) snapshot formats
 616 sub filter_snapshot_fmts {
 617         my @fmts = @_;
 618
 619         @fmts = map {
 620                 exists $known_snapshot_format_aliases{$_} ?
 621                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 622         @fmts = grep {
 623                 exists $known_snapshot_formats{$_} &&
 624                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 625 }
 626
 627 # If it is set to code reference, it is code that it is to be run once per
 628 # request, allowing updating configurations that change with each request,
 629 # while running other code in config file only once.
 630 #
 631 # Otherwise, if it is false then gitweb would process config file only once;
 632 # if it is true then gitweb config would be run for each request.
 633 our $per_request_config = 1;
 634
 635 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 636 sub evaluate_gitweb_config {
 637         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 638         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 639         # die if there are errors parsing config file
 640         if (-e $GITWEB_CONFIG) {
 641                 do $GITWEB_CONFIG;
 642                 die $@ if $@;
 643         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 644                 do $GITWEB_CONFIG_SYSTEM;
 645                 die $@ if $@;
 646         }
 647 }
 648
 649 # Get loadavg of system, to compare against $maxload.
 650 # Currently it requires '/proc/loadavg' present to get loadavg;
 651 # if it is not present it returns 0, which means no load checking.
 652 sub get_loadavg {
 653         if( -e '/proc/loadavg' ){
 654                 open my $fd, '<', '/proc/loadavg'
 655                         or return 0;
 656                 my @load = split(/\s+/, scalar <$fd>);
 657                 close $fd;
 658
 659                 # The first three columns measure CPU and IO utilization of the last one,
 660                 # five, and 10 minute periods.  The fourth column shows the number of
 661                 # currently running processes and the total number of processes in the m/n
 662                 # format.  The last column displays the last process ID used.
 663                 return $load[0] || 0;
 664         }
 665         # additional checks for load average should go here for things that don't export
 666         # /proc/loadavg
 667
 668         return 0;
 669 }
 670
 671 # version of the core git binary
 672 our $git_version;
 673 sub evaluate_git_version {
 674         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 675         $number_of_git_cmds++;
 676 }
 677
 678 sub check_loadavg {
 679         if (defined $maxload && get_loadavg() > $maxload) {
 680                 die_error(503, "The load average on the server is too high");
 681         }
 682 }
 683
 684 # ======================================================================
 685 # input validation and dispatch
 686
 687 # input parameters can be collected from a variety of sources (presently, CGI
 688 # and PATH_INFO), so we define an %input_params hash that collects them all
 689 # together during validation: this allows subsequent uses (e.g. href()) to be
 690 # agnostic of the parameter origin
 691
 692 our %input_params = ();
 693
 694 # input parameters are stored with the long parameter name as key. This will
 695 # also be used in the href subroutine to convert parameters to their CGI
 696 # equivalent, and since the href() usage is the most frequent one, we store
 697 # the name -> CGI key mapping here, instead of the reverse.
 698 #
 699 # XXX: Warning: If you touch this, check the search form for updating,
 700 # too.
 701
 702 our @cgi_param_mapping = (
 703         project => "p",
 704         action => "a",
 705         file_name => "f",
 706         file_parent => "fp",
 707         hash => "h",
 708         hash_parent => "hp",
 709         hash_base => "hb",
 710         hash_parent_base => "hpb",
 711         page => "pg",
 712         order => "o",
 713         searchtext => "s",
 714         searchtype => "st",
 715         snapshot_format => "sf",
 716         extra_options => "opt",
 717         search_use_regexp => "sr",
 718         ctag => "by_tag",
 719         # this must be last entry (for manipulation from JavaScript)
 720         javascript => "js"
 721 );
 722 our %cgi_param_mapping = @cgi_param_mapping;
 723
 724 # we will also need to know the possible actions, for validation
 725 our %actions = (
 726         "blame" => \&git_blame,
 727         "blame_incremental" => \&git_blame_incremental,
 728         "blame_data" => \&git_blame_data,
 729         "blobdiff" => \&git_blobdiff,
 730         "blobdiff_plain" => \&git_blobdiff_plain,
 731         "blob" => \&git_blob,
 732         "blob_plain" => \&git_blob_plain,
 733         "commitdiff" => \&git_commitdiff,
 734         "commitdiff_plain" => \&git_commitdiff_plain,
 735         "commit" => \&git_commit,
 736         "forks" => \&git_forks,
 737         "heads" => \&git_heads,
 738         "history" => \&git_history,
 739         "log" => \&git_log,
 740         "patch" => \&git_patch,
 741         "patches" => \&git_patches,
 742         "remotes" => \&git_remotes,
 743         "rss" => \&git_rss,
 744         "atom" => \&git_atom,
 745         "search" => \&git_search,
 746         "search_help" => \&git_search_help,
 747         "shortlog" => \&git_shortlog,
 748         "summary" => \&git_summary,
 749         "tag" => \&git_tag,
 750         "tags" => \&git_tags,
 751         "tree" => \&git_tree,
 752         "snapshot" => \&git_snapshot,
 753         "object" => \&git_object,
 754         # those below don't need $project
 755         "opml" => \&git_opml,
 756         "project_list" => \&git_project_list,
 757         "project_index" => \&git_project_index,
 758 );
 759
 760 # finally, we have the hash of allowed extra_options for the commands that
 761 # allow them
 762 our %allowed_options = (
 763         "--no-merges" => [ qw(rss atom log shortlog history) ],
 764 );
 765
 766 # fill %input_params with the CGI parameters. All values except for 'opt'
 767 # should be single values, but opt can be an array. We should probably
 768 # build an array of parameters that can be multi-valued, but since for the time
 769 # being it's only this one, we just single it out
 770 sub evaluate_query_params {
 771         our $cgi;
 772
 773         while (my ($name, $symbol) = each %cgi_param_mapping) {
 774                 if ($symbol eq 'opt') {
 775                         $input_params{$name} = [ $cgi->param($symbol) ];
 776                 } else {
 777                         $input_params{$name} = $cgi->param($symbol);
 778                 }
 779         }
 780 }
 781
 782 # now read PATH_INFO and update the parameter list for missing parameters
 783 sub evaluate_path_info {
 784         return if defined $input_params{'project'};
 785         return if !$path_info;
 786         $path_info =~ s,^/+,,;
 787         return if !$path_info;
 788
 789         # find which part of PATH_INFO is project
 790         my $project = $path_info;
 791         $project =~ s,/+$,,;
 792         while ($project && !check_head_link("$projectroot/$project")) {
 793                 $project =~ s,/*[^/]*$,,;
 794         }
 795         return unless $project;
 796         $input_params{'project'} = $project;
 797
 798         # do not change any parameters if an action is given using the query string
 799         return if $input_params{'action'};
 800         $path_info =~ s,^\Q$project\E/*,,;
 801
 802         # next, check if we have an action
 803         my $action = $path_info;
 804         $action =~ s,/.*$,,;
 805         if (exists $actions{$action}) {
 806                 $path_info =~ s,^$action/*,,;
 807                 $input_params{'action'} = $action;
 808         }
 809
 810         # list of actions that want hash_base instead of hash, but can have no
 811         # pathname (f) parameter
 812         my @wants_base = (
 813                 'tree',
 814                 'history',
 815         );
 816
 817         # we want to catch, among others
 818         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 819         my ($parentrefname, $parentpathname, $refname, $pathname) =
 820                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 821
 822         # first, analyze the 'current' part
 823         if (defined $pathname) {
 824                 # we got "branch:filename" or "branch:dir/"
 825                 # we could use git_get_type(branch:pathname), but:
 826                 # - it needs $git_dir
 827                 # - it does a git() call
 828                 # - the convention of terminating directories with a slash
 829                 #   makes it superfluous
 830                 # - embedding the action in the PATH_INFO would make it even
 831                 #   more superfluous
 832                 $pathname =~ s,^/+,,;
 833                 if (!$pathname || substr($pathname, -1) eq "/") {
 834                         $input_params{'action'} ||= "tree";
 835                         $pathname =~ s,/$,,;
 836                 } else {
 837                         # the default action depends on whether we had parent info
 838                         # or not
 839                         if ($parentrefname) {
 840                                 $input_params{'action'} ||= "blobdiff_plain";
 841                         } else {
 842                                 $input_params{'action'} ||= "blob_plain";
 843                         }
 844                 }
 845                 $input_params{'hash_base'} ||= $refname;
 846                 $input_params{'file_name'} ||= $pathname;
 847         } elsif (defined $refname) {
 848                 # we got "branch". In this case we have to choose if we have to
 849                 # set hash or hash_base.
 850                 #
 851                 # Most of the actions without a pathname only want hash to be
 852                 # set, except for the ones specified in @wants_base that want
 853                 # hash_base instead. It should also be noted that hand-crafted
 854                 # links having 'history' as an action and no pathname or hash
 855                 # set will fail, but that happens regardless of PATH_INFO.
 856                 if (defined $parentrefname) {
 857                         # if there is parent let the default be 'shortlog' action
 858                         # (for http://git.example.com/repo.git/A..B links); if there
 859                         # is no parent, dispatch will detect type of object and set
 860                         # action appropriately if required (if action is not set)
 861                         $input_params{'action'} ||= "shortlog";
 862                 }
 863                 if ($input_params{'action'} &&
 864                     grep { $_ eq $input_params{'action'} } @wants_base) {
 865                         $input_params{'hash_base'} ||= $refname;
 866                 } else {
 867                         $input_params{'hash'} ||= $refname;
 868                 }
 869         }
 870
 871         # next, handle the 'parent' part, if present
 872         if (defined $parentrefname) {
 873                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 874                 # someproject/blobdiff/oldrev..newrev:/filename
 875                 if ($parentpathname) {
 876                         $parentpathname =~ s,^/+,,;
 877                         $parentpathname =~ s,/$,,;
 878                         $input_params{'file_parent'} ||= $parentpathname;
 879                 } else {
 880                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 881                 }
 882                 # we assume that hash_parent_base is wanted if a path was specified,
 883                 # or if the action wants hash_base instead of hash
 884                 if (defined $input_params{'file_parent'} ||
 885                         grep { $_ eq $input_params{'action'} } @wants_base) {
 886                         $input_params{'hash_parent_base'} ||= $parentrefname;
 887                 } else {
 888                         $input_params{'hash_parent'} ||= $parentrefname;
 889                 }
 890         }
 891
 892         # for the snapshot action, we allow URLs in the form
 893         # $project/snapshot/$hash.ext
 894         # where .ext determines the snapshot and gets removed from the
 895         # passed $refname to provide the $hash.
 896         #
 897         # To be able to tell that $refname includes the format extension, we
 898         # require the following two conditions to be satisfied:
 899         # - the hash input parameter MUST have been set from the $refname part
 900         #   of the URL (i.e. they must be equal)
 901         # - the snapshot format MUST NOT have been defined already (e.g. from
 902         #   CGI parameter sf)
 903         # It's also useless to try any matching unless $refname has a dot,
 904         # so we check for that too
 905         if (defined $input_params{'action'} &&
 906                 $input_params{'action'} eq 'snapshot' &&
 907                 defined $refname && index($refname, '.') != -1 &&
 908                 $refname eq $input_params{'hash'} &&
 909                 !defined $input_params{'snapshot_format'}) {
 910                 # We loop over the known snapshot formats, checking for
 911                 # extensions. Allowed extensions are both the defined suffix
 912                 # (which includes the initial dot already) and the snapshot
 913                 # format key itself, with a prepended dot
 914                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 915                         my $hash = $refname;
 916                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 917                                 next;
 918                         }
 919                         my $sfx = $1;
 920                         # a valid suffix was found, so set the snapshot format
 921                         # and reset the hash parameter
 922                         $input_params{'snapshot_format'} = $fmt;
 923                         $input_params{'hash'} = $hash;
 924                         # we also set the format suffix to the one requested
 925                         # in the URL: this way a request for e.g. .tgz returns
 926                         # a .tgz instead of a .tar.gz
 927                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 928                         last;
 929                 }
 930         }
 931 }
 932
 933 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 934      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 935      $searchtext, $search_regexp);
 936 sub evaluate_and_validate_params {
 937         our $action = $input_params{'action'};
 938         if (defined $action) {
 939                 if (!validate_action($action)) {
 940                         die_error(400, "Invalid action parameter");
 941                 }
 942         }
 943
 944         # parameters which are pathnames
 945         our $project = $input_params{'project'};
 946         if (defined $project) {
 947                 if (!validate_project($project)) {
 948                         undef $project;
 949                         die_error(404, "No such project");
 950                 }
 951         }
 952
 953         our $file_name = $input_params{'file_name'};
 954         if (defined $file_name) {
 955                 if (!validate_pathname($file_name)) {
 956                         die_error(400, "Invalid file parameter");
 957                 }
 958         }
 959
 960         our $file_parent = $input_params{'file_parent'};
 961         if (defined $file_parent) {
 962                 if (!validate_pathname($file_parent)) {
 963                         die_error(400, "Invalid file parent parameter");
 964                 }
 965         }
 966
 967         # parameters which are refnames
 968         our $hash = $input_params{'hash'};
 969         if (defined $hash) {
 970                 if (!validate_refname($hash)) {
 971                         die_error(400, "Invalid hash parameter");
 972                 }
 973         }
 974
 975         our $hash_parent = $input_params{'hash_parent'};
 976         if (defined $hash_parent) {
 977                 if (!validate_refname($hash_parent)) {
 978                         die_error(400, "Invalid hash parent parameter");
 979                 }
 980         }
 981
 982         our $hash_base = $input_params{'hash_base'};
 983         if (defined $hash_base) {
 984                 if (!validate_refname($hash_base)) {
 985                         die_error(400, "Invalid hash base parameter");
 986                 }
 987         }
 988
 989         our @extra_options = @{$input_params{'extra_options'}};
 990         # @extra_options is always defined, since it can only be (currently) set from
 991         # CGI, and $cgi->param() returns the empty array in array context if the param
 992         # is not set
 993         foreach my $opt (@extra_options) {
 994                 if (not exists $allowed_options{$opt}) {
 995                         die_error(400, "Invalid option parameter");
 996                 }
 997                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 998                         die_error(400, "Invalid option parameter for this action");
 999                 }
1000         }
1001
1002         our $hash_parent_base = $input_params{'hash_parent_base'};
1003         if (defined $hash_parent_base) {
1004                 if (!validate_refname($hash_parent_base)) {
1005                         die_error(400, "Invalid hash parent base parameter");
1006                 }
1007         }
1008
1009         # other parameters
1010         our $page = $input_params{'page'};
1011         if (defined $page) {
1012                 if ($page =~ m/[^0-9]/) {
1013                         die_error(400, "Invalid page parameter");
1014                 }
1015         }
1016
1017         our $searchtype = $input_params{'searchtype'};
1018         if (defined $searchtype) {
1019                 if ($searchtype =~ m/[^a-z]/) {
1020                         die_error(400, "Invalid searchtype parameter");
1021                 }
1022         }
1023
1024         our $search_use_regexp = $input_params{'search_use_regexp'};
1025
1026         our $searchtext = $input_params{'searchtext'};
1027         our $search_regexp;
1028         if (defined $searchtext) {
1029                 if (length($searchtext) < 2) {
1030                         die_error(403, "At least two characters are required for search parameter");
1031                 }
1032                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1033         }
1034 }
1035
1036 # path to the current git repository
1037 our $git_dir;
1038 sub evaluate_git_dir {
1039         our $git_dir = "$projectroot/$project" if $project;
1040 }
1041
1042 our (@snapshot_fmts, $git_avatar);
1043 sub configure_gitweb_features {
1044         # list of supported snapshot formats
1045         our @snapshot_fmts = gitweb_get_feature('snapshot');
1046         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1047
1048         # check that the avatar feature is set to a known provider name,
1049         # and for each provider check if the dependencies are satisfied.
1050         # if the provider name is invalid or the dependencies are not met,
1051         # reset $git_avatar to the empty string.
1052         our ($git_avatar) = gitweb_get_feature('avatar');
1053         if ($git_avatar eq 'gravatar') {
1054                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1055         } elsif ($git_avatar eq 'picon') {
1056                 # no dependencies
1057         } else {
1058                 $git_avatar = '';
1059         }
1060 }
1061
1062 # custom error handler: 'die <message>' is Internal Server Error
1063 sub handle_errors_html {
1064         my $msg = shift; # it is already HTML escaped
1065
1066         # to avoid infinite loop where error occurs in die_error,
1067         # change handler to default handler, disabling handle_errors_html
1068         set_message("Error occured when inside die_error:\n$msg");
1069
1070         # you cannot jump out of die_error when called as error handler;
1071         # the subroutine set via CGI::Carp::set_message is called _after_
1072         # HTTP headers are already written, so it cannot write them itself
1073         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1074 }
1075 set_message(\&handle_errors_html);
1076
1077 # dispatch
1078 sub dispatch {
1079         if (!defined $action) {
1080                 if (defined $hash) {
1081                         $action = git_get_type($hash);
1082                 } elsif (defined $hash_base && defined $file_name) {
1083                         $action = git_get_type("$hash_base:$file_name");
1084                 } elsif (defined $project) {
1085                         $action = 'summary';
1086                 } else {
1087                         $action = 'project_list';
1088                 }
1089         }
1090         if (!defined($actions{$action})) {
1091                 die_error(400, "Unknown action");
1092         }
1093         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1094             !$project) {
1095                 die_error(400, "Project needed");
1096         }
1097         $actions{$action}->();
1098 }
1099
1100 sub reset_timer {
1101         our $t0 = [ gettimeofday() ]
1102                 if defined $t0;
1103         our $number_of_git_cmds = 0;
1104 }
1105
1106 our $first_request = 1;
1107 sub run_request {
1108         reset_timer();
1109
1110         evaluate_uri();
1111         if ($first_request) {
1112                 evaluate_gitweb_config();
1113                 evaluate_git_version();
1114         }
1115         if ($per_request_config) {
1116                 if (ref($per_request_config) eq 'CODE') {
1117                         $per_request_config->();
1118                 } elsif (!$first_request) {
1119                         evaluate_gitweb_config();
1120                 }
1121         }
1122         check_loadavg();
1123
1124         # $projectroot and $projects_list might be set in gitweb config file
1125         $projects_list ||= $projectroot;
1126
1127         evaluate_query_params();
1128         evaluate_path_info();
1129         evaluate_and_validate_params();
1130         evaluate_git_dir();
1131
1132         configure_gitweb_features();
1133
1134         dispatch();
1135 }
1136
1137 our $is_last_request = sub { 1 };
1138 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1139 our $CGI = 'CGI';
1140 our $cgi;
1141 sub configure_as_fcgi {
1142         require CGI::Fast;
1143         our $CGI = 'CGI::Fast';
1144
1145         my $request_number = 0;
1146         # let each child service 100 requests
1147         our $is_last_request = sub { ++$request_number > 100 };
1148 }
1149 sub evaluate_argv {
1150         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1151         configure_as_fcgi()
1152                 if $script_name =~ /\.fcgi$/;
1153
1154         return unless (@ARGV);
1155
1156         require Getopt::Long;
1157         Getopt::Long::GetOptions(
1158                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1159                 'nproc|n=i' => sub {
1160                         my ($arg, $val) = @_;
1161                         return unless eval { require FCGI::ProcManager; 1; };
1162                         my $proc_manager = FCGI::ProcManager->new({
1163                                 n_processes => $val,
1164                         });
1165                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1166                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1167                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1168                 },
1169         );
1170 }
1171
1172 sub run {
1173         evaluate_argv();
1174
1175         $first_request = 1;
1176         $pre_listen_hook->()
1177                 if $pre_listen_hook;
1178
1179  REQUEST:
1180         while ($cgi = $CGI->new()) {
1181                 $pre_dispatch_hook->()
1182                         if $pre_dispatch_hook;
1183
1184                 run_request();
1185
1186                 $post_dispatch_hook->()
1187                         if $post_dispatch_hook;
1188                 $first_request = 0;
1189
1190                 last REQUEST if ($is_last_request->());
1191         }
1192
1193  DONE_GITWEB:
1194         1;
1195 }
1196
1197 run();
1198
1199 if (defined caller) {
1200         # wrapped in a subroutine processing requests,
1201         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1202         return;
1203 } else {
1204         # pure CGI script, serving single request
1205         exit;
1206 }
1207
1208 ## ======================================================================
1209 ## action links
1210
1211 # possible values of extra options
1212 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1213 # -replay => 1      - start from a current view (replay with modifications)
1214 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1215 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1216 sub href {
1217         my %params = @_;
1218         # default is to use -absolute url() i.e. $my_uri
1219         my $href = $params{-full} ? $my_url : $my_uri;
1220
1221         # implicit -replay, must be first of implicit params
1222         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1223
1224         $params{'project'} = $project unless exists $params{'project'};
1225
1226         if ($params{-replay}) {
1227                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1228                         if (!exists $params{$name}) {
1229                                 $params{$name} = $input_params{$name};
1230                         }
1231                 }
1232         }
1233
1234         my $use_pathinfo = gitweb_check_feature('pathinfo');
1235         if (defined $params{'project'} &&
1236             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1237                 # try to put as many parameters as possible in PATH_INFO:
1238                 #   - project name
1239                 #   - action
1240                 #   - hash_parent or hash_parent_base:/file_parent
1241                 #   - hash or hash_base:/filename
1242                 #   - the snapshot_format as an appropriate suffix
1243
1244                 # When the script is the root DirectoryIndex for the domain,
1245                 # $href here would be something like http://gitweb.example.com/
1246                 # Thus, we strip any trailing / from $href, to spare us double
1247                 # slashes in the final URL
1248                 $href =~ s,/$,,;
1249
1250                 # Then add the project name, if present
1251                 $href .= "/".esc_path_info($params{'project'});
1252                 delete $params{'project'};
1253
1254                 # since we destructively absorb parameters, we keep this
1255                 # boolean that remembers if we're handling a snapshot
1256                 my $is_snapshot = $params{'action'} eq 'snapshot';
1257
1258                 # Summary just uses the project path URL, any other action is
1259                 # added to the URL
1260                 if (defined $params{'action'}) {
1261                         $href .= "/".esc_path_info($params{'action'})
1262                                 unless $params{'action'} eq 'summary';
1263                         delete $params{'action'};
1264                 }
1265
1266                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1267                 # stripping nonexistent or useless pieces
1268                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1269                         || $params{'hash_parent'} || $params{'hash'});
1270                 if (defined $params{'hash_base'}) {
1271                         if (defined $params{'hash_parent_base'}) {
1272                                 $href .= esc_path_info($params{'hash_parent_base'});
1273                                 # skip the file_parent if it's the same as the file_name
1274                                 if (defined $params{'file_parent'}) {
1275                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1276                                                 delete $params{'file_parent'};
1277                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1278                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1279                                                 delete $params{'file_parent'};
1280                                         }
1281                                 }
1282                                 $href .= "..";
1283                                 delete $params{'hash_parent'};
1284                                 delete $params{'hash_parent_base'};
1285                         } elsif (defined $params{'hash_parent'}) {
1286                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1287                                 delete $params{'hash_parent'};
1288                         }
1289
1290                         $href .= esc_path_info($params{'hash_base'});
1291                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1292                                 $href .= ":/".esc_path_info($params{'file_name'});
1293                                 delete $params{'file_name'};
1294                         }
1295                         delete $params{'hash'};
1296                         delete $params{'hash_base'};
1297                 } elsif (defined $params{'hash'}) {
1298                         $href .= esc_path_info($params{'hash'});
1299                         delete $params{'hash'};
1300                 }
1301
1302                 # If the action was a snapshot, we can absorb the
1303                 # snapshot_format parameter too
1304                 if ($is_snapshot) {
1305                         my $fmt = $params{'snapshot_format'};
1306                         # snapshot_format should always be defined when href()
1307                         # is called, but just in case some code forgets, we
1308                         # fall back to the default
1309                         $fmt ||= $snapshot_fmts[0];
1310                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1311                         delete $params{'snapshot_format'};
1312                 }
1313         }
1314
1315         # now encode the parameters explicitly
1316         my @result = ();
1317         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1318                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1319                 if (defined $params{$name}) {
1320                         if (ref($params{$name}) eq "ARRAY") {
1321                                 foreach my $par (@{$params{$name}}) {
1322                                         push @result, $symbol . "=" . esc_param($par);
1323                                 }
1324                         } else {
1325                                 push @result, $symbol . "=" . esc_param($params{$name});
1326                         }
1327                 }
1328         }
1329         $href .= "?" . join(';', @result) if scalar @result;
1330
1331         # final transformation: trailing spaces must be escaped (URI-encoded)
1332         $href =~ s/(\s+)$/CGI::escape($1)/e;
1333
1334         if ($params{-anchor}) {
1335                 $href .= "#".esc_param($params{-anchor});
1336         }
1337
1338         return $href;
1339 }
1340
1341
1342 ## ======================================================================
1343 ## validation, quoting/unquoting and escaping
1344
1345 sub validate_action {
1346         my $input = shift || return undef;
1347         return undef unless exists $actions{$input};
1348         return $input;
1349 }
1350
1351 sub validate_project {
1352         my $input = shift || return undef;
1353         if (!validate_pathname($input) ||
1354                 !(-d "$projectroot/$input") ||
1355                 !check_export_ok("$projectroot/$input") ||
1356                 ($strict_export && !project_in_list($input))) {
1357                 return undef;
1358         } else {
1359                 return $input;
1360         }
1361 }
1362
1363 sub validate_pathname {
1364         my $input = shift || return undef;
1365
1366         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1367         # at the beginning, at the end, and between slashes.
1368         # also this catches doubled slashes
1369         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1370                 return undef;
1371         }
1372         # no null characters
1373         if ($input =~ m!\0!) {
1374                 return undef;
1375         }
1376         return $input;
1377 }
1378
1379 sub validate_refname {
1380         my $input = shift || return undef;
1381
1382         # textual hashes are O.K.
1383         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1384                 return $input;
1385         }
1386         # it must be correct pathname
1387         $input = validate_pathname($input)
1388                 or return undef;
1389         # restrictions on ref name according to git-check-ref-format
1390         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1391                 return undef;
1392         }
1393         return $input;
1394 }
1395
1396 # decode sequences of octets in utf8 into Perl's internal form,
1397 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1398 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1399 sub to_utf8 {
1400         my $str = shift;
1401         return undef unless defined $str;
1402         if (utf8::valid($str)) {
1403                 utf8::decode($str);
1404                 return $str;
1405         } else {
1406                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1407         }
1408 }
1409
1410 # quote unsafe chars, but keep the slash, even when it's not
1411 # correct, but quoted slashes look too horrible in bookmarks
1412 sub esc_param {
1413         my $str = shift;
1414         return undef unless defined $str;
1415         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1416         $str =~ s/ /\+/g;
1417         return $str;
1418 }
1419
1420 # the quoting rules for path_info fragment are slightly different
1421 sub esc_path_info {
1422         my $str = shift;
1423         return undef unless defined $str;
1424
1425         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1426         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1427
1428         return $str;
1429 }
1430
1431 # quote unsafe chars in whole URL, so some characters cannot be quoted
1432 sub esc_url {
1433         my $str = shift;
1434         return undef unless defined $str;
1435         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1436         $str =~ s/ /\+/g;
1437         return $str;
1438 }
1439
1440 # quote unsafe characters in HTML attributes
1441 sub esc_attr {
1442
1443         # for XHTML conformance escaping '"' to '&quot;' is not enough
1444         return esc_html(@_);
1445 }
1446
1447 # replace invalid utf8 character with SUBSTITUTION sequence
1448 sub esc_html {
1449         my $str = shift;
1450         my %opts = @_;
1451
1452         return undef unless defined $str;
1453
1454         $str = to_utf8($str);
1455         $str = $cgi->escapeHTML($str);
1456         if ($opts{'-nbsp'}) {
1457                 $str =~ s/ /&nbsp;/g;
1458         }
1459         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1460         return $str;
1461 }
1462
1463 # quote control characters and escape filename to HTML
1464 sub esc_path {
1465         my $str = shift;
1466         my %opts = @_;
1467
1468         return undef unless defined $str;
1469
1470         $str = to_utf8($str);
1471         $str = $cgi->escapeHTML($str);
1472         if ($opts{'-nbsp'}) {
1473                 $str =~ s/ /&nbsp;/g;
1474         }
1475         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1476         return $str;
1477 }
1478
1479 # Make control characters "printable", using character escape codes (CEC)
1480 sub quot_cec {
1481         my $cntrl = shift;
1482         my %opts = @_;
1483         my %es = ( # character escape codes, aka escape sequences
1484                 "\t" => '\t',   # tab            (HT)
1485                 "\n" => '\n',   # line feed      (LF)
1486                 "\r" => '\r',   # carrige return (CR)
1487                 "\f" => '\f',   # form feed      (FF)
1488                 "\b" => '\b',   # backspace      (BS)
1489                 "\a" => '\a',   # alarm (bell)   (BEL)
1490                 "\e" => '\e',   # escape         (ESC)
1491                 "\013" => '\v', # vertical tab   (VT)
1492                 "\000" => '\0', # nul character  (NUL)
1493         );
1494         my $chr = ( (exists $es{$cntrl})
1495                     ? $es{$cntrl}
1496                     : sprintf('\%2x', ord($cntrl)) );
1497         if ($opts{-nohtml}) {
1498                 return $chr;
1499         } else {
1500                 return "<span class=\"cntrl\">$chr</span>";
1501         }
1502 }
1503
1504 # Alternatively use unicode control pictures codepoints,
1505 # Unicode "printable representation" (PR)
1506 sub quot_upr {
1507         my $cntrl = shift;
1508         my %opts = @_;
1509
1510         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1511         if ($opts{-nohtml}) {
1512                 return $chr;
1513         } else {
1514                 return "<span class=\"cntrl\">$chr</span>";
1515         }
1516 }
1517
1518 # git may return quoted and escaped filenames
1519 sub unquote {
1520         my $str = shift;
1521
1522         sub unq {
1523                 my $seq = shift;
1524                 my %es = ( # character escape codes, aka escape sequences
1525                         't' => "\t",   # tab            (HT, TAB)
1526                         'n' => "\n",   # newline        (NL)
1527                         'r' => "\r",   # return         (CR)
1528                         'f' => "\f",   # form feed      (FF)
1529                         'b' => "\b",   # backspace      (BS)
1530                         'a' => "\a",   # alarm (bell)   (BEL)
1531                         'e' => "\e",   # escape         (ESC)
1532                         'v' => "\013", # vertical tab   (VT)
1533                 );
1534
1535                 if ($seq =~ m/^[0-7]{1,3}$/) {
1536                         # octal char sequence
1537                         return chr(oct($seq));
1538                 } elsif (exists $es{$seq}) {
1539                         # C escape sequence, aka character escape code
1540                         return $es{$seq};
1541                 }
1542                 # quoted ordinary character
1543                 return $seq;
1544         }
1545
1546         if ($str =~ m/^"(.*)"$/) {
1547                 # needs unquoting
1548                 $str = $1;
1549                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1550         }
1551         return $str;
1552 }
1553
1554 # escape tabs (convert tabs to spaces)
1555 sub untabify {
1556         my $line = shift;
1557
1558         while ((my $pos = index($line, "\t")) != -1) {
1559                 if (my $count = (8 - ($pos % 8))) {
1560                         my $spaces = ' ' x $count;
1561                         $line =~ s/\t/$spaces/;
1562                 }
1563         }
1564
1565         return $line;
1566 }
1567
1568 sub project_in_list {
1569         my $project = shift;
1570         my @list = git_get_projects_list();
1571         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1572 }
1573
1574 ## ----------------------------------------------------------------------
1575 ## HTML aware string manipulation
1576
1577 # Try to chop given string on a word boundary between position
1578 # $len and $len+$add_len. If there is no word boundary there,
1579 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1580 # (marking chopped part) would be longer than given string.
1581 sub chop_str {
1582         my $str = shift;
1583         my $len = shift;
1584         my $add_len = shift || 10;
1585         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1586
1587         # Make sure perl knows it is utf8 encoded so we don't
1588         # cut in the middle of a utf8 multibyte char.
1589         $str = to_utf8($str);
1590
1591         # allow only $len chars, but don't cut a word if it would fit in $add_len
1592         # if it doesn't fit, cut it if it's still longer than the dots we would add
1593         # remove chopped character entities entirely
1594
1595         # when chopping in the middle, distribute $len into left and right part
1596         # return early if chopping wouldn't make string shorter
1597         if ($where eq 'center') {
1598                 return $str if ($len + 5 >= length($str)); # filler is length 5
1599                 $len = int($len/2);
1600         } else {
1601                 return $str if ($len + 4 >= length($str)); # filler is length 4
1602         }
1603
1604         # regexps: ending and beginning with word part up to $add_len
1605         my $endre = qr/.{$len}\w{0,$add_len}/;
1606         my $begre = qr/\w{0,$add_len}.{$len}/;
1607
1608         if ($where eq 'left') {
1609                 $str =~ m/^(.*?)($begre)$/;
1610                 my ($lead, $body) = ($1, $2);
1611                 if (length($lead) > 4) {
1612                         $lead = " ...";
1613                 }
1614                 return "$lead$body";
1615
1616         } elsif ($where eq 'center') {
1617                 $str =~ m/^($endre)(.*)$/;
1618                 my ($left, $str)  = ($1, $2);
1619                 $str =~ m/^(.*?)($begre)$/;
1620                 my ($mid, $right) = ($1, $2);
1621                 if (length($mid) > 5) {
1622                         $mid = " ... ";
1623                 }
1624                 return "$left$mid$right";
1625
1626         } else {
1627                 $str =~ m/^($endre)(.*)$/;
1628                 my $body = $1;
1629                 my $tail = $2;
1630                 if (length($tail) > 4) {
1631                         $tail = "... ";
1632                 }
1633                 return "$body$tail";
1634         }
1635 }
1636
1637 # takes the same arguments as chop_str, but also wraps a <span> around the
1638 # result with a title attribute if it does get chopped. Additionally, the
1639 # string is HTML-escaped.
1640 sub chop_and_escape_str {
1641         my ($str) = @_;
1642
1643         my $chopped = chop_str(@_);
1644         if ($chopped eq $str) {
1645                 return esc_html($chopped);
1646         } else {
1647                 $str =~ s/[[:cntrl:]]/?/g;
1648                 return $cgi->span({-title=>$str}, esc_html($chopped));
1649         }
1650 }
1651
1652 ## ----------------------------------------------------------------------
1653 ## functions returning short strings
1654
1655 # CSS class for given age value (in seconds)
1656 sub age_class {
1657         my $age = shift;
1658
1659         if (!defined $age) {
1660                 return "noage";
1661         } elsif ($age < 60*60*2) {
1662                 return "age0";
1663         } elsif ($age < 60*60*24*2) {
1664                 return "age1";
1665         } else {
1666                 return "age2";
1667         }
1668 }
1669
1670 # convert age in seconds to "nn units ago" string
1671 sub age_string {
1672         my $age = shift;
1673         my $age_str;
1674
1675         if ($age > 60*60*24*365*2) {
1676                 $age_str = (int $age/60/60/24/365);
1677                 $age_str .= " years ago";
1678         } elsif ($age > 60*60*24*(365/12)*2) {
1679                 $age_str = int $age/60/60/24/(365/12);
1680                 $age_str .= " months ago";
1681         } elsif ($age > 60*60*24*7*2) {
1682                 $age_str = int $age/60/60/24/7;
1683                 $age_str .= " weeks ago";
1684         } elsif ($age > 60*60*24*2) {
1685                 $age_str = int $age/60/60/24;
1686                 $age_str .= " days ago";
1687         } elsif ($age > 60*60*2) {
1688                 $age_str = int $age/60/60;
1689                 $age_str .= " hours ago";
1690         } elsif ($age > 60*2) {
1691                 $age_str = int $age/60;
1692                 $age_str .= " min ago";
1693         } elsif ($age > 2) {
1694                 $age_str = int $age;
1695                 $age_str .= " sec ago";
1696         } else {
1697                 $age_str .= " right now";
1698         }
1699         return $age_str;
1700 }
1701
1702 use constant {
1703         S_IFINVALID => 0030000,
1704         S_IFGITLINK => 0160000,
1705 };
1706
1707 # submodule/subproject, a commit object reference
1708 sub S_ISGITLINK {
1709         my $mode = shift;
1710
1711         return (($mode & S_IFMT) == S_IFGITLINK)
1712 }
1713
1714 # convert file mode in octal to symbolic file mode string
1715 sub mode_str {
1716         my $mode = oct shift;
1717
1718         if (S_ISGITLINK($mode)) {
1719                 return 'm---------';
1720         } elsif (S_ISDIR($mode & S_IFMT)) {
1721                 return 'drwxr-xr-x';
1722         } elsif (S_ISLNK($mode)) {
1723                 return 'lrwxrwxrwx';
1724         } elsif (S_ISREG($mode)) {
1725                 # git cares only about the executable bit
1726                 if ($mode & S_IXUSR) {
1727                         return '-rwxr-xr-x';
1728                 } else {
1729                         return '-rw-r--r--';
1730                 };
1731         } else {
1732                 return '----------';
1733         }
1734 }
1735
1736 # convert file mode in octal to file type string
1737 sub file_type {
1738         my $mode = shift;
1739
1740         if ($mode !~ m/^[0-7]+$/) {
1741                 return $mode;
1742         } else {
1743                 $mode = oct $mode;
1744         }
1745
1746         if (S_ISGITLINK($mode)) {
1747                 return "submodule";
1748         } elsif (S_ISDIR($mode & S_IFMT)) {
1749                 return "directory";
1750         } elsif (S_ISLNK($mode)) {
1751                 return "symlink";
1752         } elsif (S_ISREG($mode)) {
1753                 return "file";
1754         } else {
1755                 return "unknown";
1756         }
1757 }
1758
1759 # convert file mode in octal to file type description string
1760 sub file_type_long {
1761         my $mode = shift;
1762
1763         if ($mode !~ m/^[0-7]+$/) {
1764                 return $mode;
1765         } else {
1766                 $mode = oct $mode;
1767         }
1768
1769         if (S_ISGITLINK($mode)) {
1770                 return "submodule";
1771         } elsif (S_ISDIR($mode & S_IFMT)) {
1772                 return "directory";
1773         } elsif (S_ISLNK($mode)) {
1774                 return "symlink";
1775         } elsif (S_ISREG($mode)) {
1776                 if ($mode & S_IXUSR) {
1777                         return "executable";
1778                 } else {
1779                         return "file";
1780                 };
1781         } else {
1782                 return "unknown";
1783         }
1784 }
1785
1786
1787 ## ----------------------------------------------------------------------
1788 ## functions returning short HTML fragments, or transforming HTML fragments
1789 ## which don't belong to other sections
1790
1791 # format line of commit message.
1792 sub format_log_line_html {
1793         my $line = shift;
1794
1795         $line = esc_html($line, -nbsp=>1);
1796         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1797                 $cgi->a({-href => href(action=>"object", hash=>$1),
1798                                         -class => "text"}, $1);
1799         }eg;
1800
1801         return $line;
1802 }
1803
1804 # format marker of refs pointing to given object
1805
1806 # the destination action is chosen based on object type and current context:
1807 # - for annotated tags, we choose the tag view unless it's the current view
1808 #   already, in which case we go to shortlog view
1809 # - for other refs, we keep the current view if we're in history, shortlog or
1810 #   log view, and select shortlog otherwise
1811 sub format_ref_marker {
1812         my ($refs, $id) = @_;
1813         my $markers = '';
1814
1815         if (defined $refs->{$id}) {
1816                 foreach my $ref (@{$refs->{$id}}) {
1817                         # this code exploits the fact that non-lightweight tags are the
1818                         # only indirect objects, and that they are the only objects for which
1819                         # we want to use tag instead of shortlog as action
1820                         my ($type, $name) = qw();
1821                         my $indirect = ($ref =~ s/\^\{\}$//);
1822                         # e.g. tags/v2.6.11 or heads/next
1823                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1824                                 $type = $1;
1825                                 $name = $2;
1826                         } else {
1827                                 $type = "ref";
1828                                 $name = $ref;
1829                         }
1830
1831                         my $class = $type;
1832                         $class .= " indirect" if $indirect;
1833
1834                         my $dest_action = "shortlog";
1835
1836                         if ($indirect) {
1837                                 $dest_action = "tag" unless $action eq "tag";
1838                         } elsif ($action =~ /^(history|(short)?log)$/) {
1839                                 $dest_action = $action;
1840                         }
1841
1842                         my $dest = "";
1843                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1844                         $dest .= $ref;
1845
1846                         my $link = $cgi->a({
1847                                 -href => href(
1848                                         action=>$dest_action,
1849                                         hash=>$dest
1850                                 )}, $name);
1851
1852                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1853                                 $link . "</span>";
1854                 }
1855         }
1856
1857         if ($markers) {
1858                 return ' <span class="refs">'. $markers . '</span>';
1859         } else {
1860                 return "";
1861         }
1862 }
1863
1864 # format, perhaps shortened and with markers, title line
1865 sub format_subject_html {
1866         my ($long, $short, $href, $extra) = @_;
1867         $extra = '' unless defined($extra);
1868
1869         if (length($short) < length($long)) {
1870                 $long =~ s/[[:cntrl:]]/?/g;
1871                 return $cgi->a({-href => $href, -class => "list subject",
1872                                 -title => to_utf8($long)},
1873                        esc_html($short)) . $extra;
1874         } else {
1875                 return $cgi->a({-href => $href, -class => "list subject"},
1876                        esc_html($long)) . $extra;
1877         }
1878 }
1879
1880 # Rather than recomputing the url for an email multiple times, we cache it
1881 # after the first hit. This gives a visible benefit in views where the avatar
1882 # for the same email is used repeatedly (e.g. shortlog).
1883 # The cache is shared by all avatar engines (currently gravatar only), which
1884 # are free to use it as preferred. Since only one avatar engine is used for any
1885 # given page, there's no risk for cache conflicts.
1886 our %avatar_cache = ();
1887
1888 # Compute the picon url for a given email, by using the picon search service over at
1889 # http://www.cs.indiana.edu/picons/search.html
1890 sub picon_url {
1891         my $email = lc shift;
1892         if (!$avatar_cache{$email}) {
1893                 my ($user, $domain) = split('@', $email);
1894                 $avatar_cache{$email} =
1895                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1896                         "$domain/$user/" .
1897                         "users+domains+unknown/up/single";
1898         }
1899         return $avatar_cache{$email};
1900 }
1901
1902 # Compute the gravatar url for a given email, if it's not in the cache already.
1903 # Gravatar stores only the part of the URL before the size, since that's the
1904 # one computationally more expensive. This also allows reuse of the cache for
1905 # different sizes (for this particular engine).
1906 sub gravatar_url {
1907         my $email = lc shift;
1908         my $size = shift;
1909         $avatar_cache{$email} ||=
1910                 "http://www.gravatar.com/avatar/" .
1911                         Digest::MD5::md5_hex($email) . "?s=";
1912         return $avatar_cache{$email} . $size;
1913 }
1914
1915 # Insert an avatar for the given $email at the given $size if the feature
1916 # is enabled.
1917 sub git_get_avatar {
1918         my ($email, %opts) = @_;
1919         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1920         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1921         $opts{-size} ||= 'default';
1922         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1923         my $url = "";
1924         if ($git_avatar eq 'gravatar') {
1925                 $url = gravatar_url($email, $size);
1926         } elsif ($git_avatar eq 'picon') {
1927                 $url = picon_url($email);
1928         }
1929         # Other providers can be added by extending the if chain, defining $url
1930         # as needed. If no variant puts something in $url, we assume avatars
1931         # are completely disabled/unavailable.
1932         if ($url) {
1933                 return $pre_white .
1934                        "<img width=\"$size\" " .
1935                             "class=\"avatar\" " .
1936                             "src=\"".esc_url($url)."\" " .
1937                             "alt=\"\" " .
1938                        "/>" . $post_white;
1939         } else {
1940                 return "";
1941         }
1942 }
1943
1944 sub format_search_author {
1945         my ($author, $searchtype, $displaytext) = @_;
1946         my $have_search = gitweb_check_feature('search');
1947
1948         if ($have_search) {
1949                 my $performed = "";
1950                 if ($searchtype eq 'author') {
1951                         $performed = "authored";
1952                 } elsif ($searchtype eq 'committer') {
1953                         $performed = "committed";
1954                 }
1955
1956                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1957                                 searchtext=>$author,
1958                                 searchtype=>$searchtype), class=>"list",
1959                                 title=>"Search for commits $performed by $author"},
1960                                 $displaytext);
1961
1962         } else {
1963                 return $displaytext;
1964         }
1965 }
1966
1967 # format the author name of the given commit with the given tag
1968 # the author name is chopped and escaped according to the other
1969 # optional parameters (see chop_str).
1970 sub format_author_html {
1971         my $tag = shift;
1972         my $co = shift;
1973         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1974         return "<$tag class=\"author\">" .
1975                format_search_author($co->{'author_name'}, "author",
1976                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1977                        $author) .
1978                "</$tag>";
1979 }
1980
1981 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1982 sub format_git_diff_header_line {
1983         my $line = shift;
1984         my $diffinfo = shift;
1985         my ($from, $to) = @_;
1986
1987         if ($diffinfo->{'nparents'}) {
1988                 # combined diff
1989                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1990                 if ($to->{'href'}) {
1991                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1992                                          esc_path($to->{'file'}));
1993                 } else { # file was deleted (no href)
1994                         $line .= esc_path($to->{'file'});
1995                 }
1996         } else {
1997                 # "ordinary" diff
1998                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1999                 if ($from->{'href'}) {
2000                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2001                                          'a/' . esc_path($from->{'file'}));
2002                 } else { # file was added (no href)
2003                         $line .= 'a/' . esc_path($from->{'file'});
2004                 }
2005                 $line .= ' ';
2006                 if ($to->{'href'}) {
2007                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2008                                          'b/' . esc_path($to->{'file'}));
2009                 } else { # file was deleted
2010                         $line .= 'b/' . esc_path($to->{'file'});
2011                 }
2012         }
2013
2014         return "<div class=\"diff header\">$line</div>\n";
2015 }
2016
2017 # format extended diff header line, before patch itself
2018 sub format_extended_diff_header_line {
2019         my $line = shift;
2020         my $diffinfo = shift;
2021         my ($from, $to) = @_;
2022
2023         # match <path>
2024         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2025                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2026                                        esc_path($from->{'file'}));
2027         }
2028         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2029                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2030                                  esc_path($to->{'file'}));
2031         }
2032         # match single <mode>
2033         if ($line =~ m/\s(\d{6})$/) {
2034                 $line .= '<span class="info"> (' .
2035                          file_type_long($1) .
2036                          ')</span>';
2037         }
2038         # match <hash>
2039         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2040                 # can match only for combined diff
2041                 $line = 'index ';
2042                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2043                         if ($from->{'href'}[$i]) {
2044                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2045                                                   -class=>"hash"},
2046                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2047                         } else {
2048                                 $line .= '0' x 7;
2049                         }
2050                         # separator
2051                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2052                 }
2053                 $line .= '..';
2054                 if ($to->{'href'}) {
2055                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2056                                          substr($diffinfo->{'to_id'},0,7));
2057                 } else {
2058                         $line .= '0' x 7;
2059                 }
2060
2061         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2062                 # can match only for ordinary diff
2063                 my ($from_link, $to_link);
2064                 if ($from->{'href'}) {
2065                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2066                                              substr($diffinfo->{'from_id'},0,7));
2067                 } else {
2068                         $from_link = '0' x 7;
2069                 }
2070                 if ($to->{'href'}) {
2071                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2072                                            substr($diffinfo->{'to_id'},0,7));
2073                 } else {
2074                         $to_link = '0' x 7;
2075                 }
2076                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2077                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2078         }
2079
2080         return $line . "<br/>\n";
2081 }
2082
2083 # format from-file/to-file diff header
2084 sub format_diff_from_to_header {
2085         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2086         my $line;
2087         my $result = '';
2088
2089         $line = $from_line;
2090         #assert($line =~ m/^---/) if DEBUG;
2091         # no extra formatting for "^--- /dev/null"
2092         if (! $diffinfo->{'nparents'}) {
2093                 # ordinary (single parent) diff
2094                 if ($line =~ m!^--- "?a/!) {
2095                         if ($from->{'href'}) {
2096                                 $line = '--- a/' .
2097                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2098                                                 esc_path($from->{'file'}));
2099                         } else {
2100                                 $line = '--- a/' .
2101                                         esc_path($from->{'file'});
2102                         }
2103                 }
2104                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2105
2106         } else {
2107                 # combined diff (merge commit)
2108                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2109                         if ($from->{'href'}[$i]) {
2110                                 $line = '--- ' .
2111                                         $cgi->a({-href=>href(action=>"blobdiff",
2112                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2113                                                              hash_parent_base=>$parents[$i],
2114                                                              file_parent=>$from->{'file'}[$i],
2115                                                              hash=>$diffinfo->{'to_id'},
2116                                                              hash_base=>$hash,
2117                                                              file_name=>$to->{'file'}),
2118                                                  -class=>"path",
2119                                                  -title=>"diff" . ($i+1)},
2120                                                 $i+1) .
2121                                         '/' .
2122                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2123                                                 esc_path($from->{'file'}[$i]));
2124                         } else {
2125                                 $line = '--- /dev/null';
2126                         }
2127                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2128                 }
2129         }
2130
2131         $line = $to_line;
2132         #assert($line =~ m/^\+\+\+/) if DEBUG;
2133         # no extra formatting for "^+++ /dev/null"
2134         if ($line =~ m!^\+\+\+ "?b/!) {
2135                 if ($to->{'href'}) {
2136                         $line = '+++ b/' .
2137                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2138                                         esc_path($to->{'file'}));
2139                 } else {
2140                         $line = '+++ b/' .
2141                                 esc_path($to->{'file'});
2142                 }
2143         }
2144         $result .= qq!<div class="diff to_file">$line</div>\n!;
2145
2146         return $result;
2147 }
2148
2149 # create note for patch simplified by combined diff
2150 sub format_diff_cc_simplified {
2151         my ($diffinfo, @parents) = @_;
2152         my $result = '';
2153
2154         $result .= "<div class=\"diff header\">" .
2155                    "diff --cc ";
2156         if (!is_deleted($diffinfo)) {
2157                 $result .= $cgi->a({-href => href(action=>"blob",
2158                                                   hash_base=>$hash,
2159                                                   hash=>$diffinfo->{'to_id'},
2160                                                   file_name=>$diffinfo->{'to_file'}),
2161                                     -class => "path"},
2162                                    esc_path($diffinfo->{'to_file'}));
2163         } else {
2164                 $result .= esc_path($diffinfo->{'to_file'});
2165         }
2166         $result .= "</div>\n" . # class="diff header"
2167                    "<div class=\"diff nodifferences\">" .
2168                    "Simple merge" .
2169                    "</div>\n"; # class="diff nodifferences"
2170
2171         return $result;
2172 }
2173
2174 # format patch (diff) line (not to be used for diff headers)
2175 sub format_diff_line {
2176         my $line = shift;
2177         my ($from, $to) = @_;
2178         my $diff_class = "";
2179
2180         chomp $line;
2181
2182         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2183                 # combined diff
2184                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2185                 if ($line =~ m/^\@{3}/) {
2186                         $diff_class = " chunk_header";
2187                 } elsif ($line =~ m/^\\/) {
2188                         $diff_class = " incomplete";
2189                 } elsif ($prefix =~ tr/+/+/) {
2190                         $diff_class = " add";
2191                 } elsif ($prefix =~ tr/-/-/) {
2192                         $diff_class = " rem";
2193                 }
2194         } else {
2195                 # assume ordinary diff
2196                 my $char = substr($line, 0, 1);
2197                 if ($char eq '+') {
2198                         $diff_class = " add";
2199                 } elsif ($char eq '-') {
2200                         $diff_class = " rem";
2201                 } elsif ($char eq '@') {
2202                         $diff_class = " chunk_header";
2203                 } elsif ($char eq "\\") {
2204                         $diff_class = " incomplete";
2205                 }
2206         }
2207         $line = untabify($line);
2208         if ($from && $to && $line =~ m/^\@{2} /) {
2209                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2210                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2211
2212                 $from_lines = 0 unless defined $from_lines;
2213                 $to_lines   = 0 unless defined $to_lines;
2214
2215                 if ($from->{'href'}) {
2216                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2217                                              -class=>"list"}, $from_text);
2218                 }
2219                 if ($to->{'href'}) {
2220                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2221                                              -class=>"list"}, $to_text);
2222                 }
2223                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2224                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2225                 return "<div class=\"diff$diff_class\">$line</div>\n";
2226         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2227                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2228                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2229
2230                 @from_text = split(' ', $ranges);
2231                 for (my $i = 0; $i < @from_text; ++$i) {
2232                         ($from_start[$i], $from_nlines[$i]) =
2233                                 (split(',', substr($from_text[$i], 1)), 0);
2234                 }
2235
2236                 $to_text   = pop @from_text;
2237                 $to_start  = pop @from_start;
2238                 $to_nlines = pop @from_nlines;
2239
2240                 $line = "<span class=\"chunk_info\">$prefix ";
2241                 for (my $i = 0; $i < @from_text; ++$i) {
2242                         if ($from->{'href'}[$i]) {
2243                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2244                                                   -class=>"list"}, $from_text[$i]);
2245                         } else {
2246                                 $line .= $from_text[$i];
2247                         }
2248                         $line .= " ";
2249                 }
2250                 if ($to->{'href'}) {
2251                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2252                                           -class=>"list"}, $to_text);
2253                 } else {
2254                         $line .= $to_text;
2255                 }
2256                 $line .= " $prefix</span>" .
2257                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2258                 return "<div class=\"diff$diff_class\">$line</div>\n";
2259         }
2260         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2261 }
2262
2263 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2264 # linked.  Pass the hash of the tree/commit to snapshot.
2265 sub format_snapshot_links {
2266         my ($hash) = @_;
2267         my $num_fmts = @snapshot_fmts;
2268         if ($num_fmts > 1) {
2269                 # A parenthesized list of links bearing format names.
2270                 # e.g. "snapshot (_tar.gz_ _zip_)"
2271                 return "snapshot (" . join(' ', map
2272                         $cgi->a({
2273                                 -href => href(
2274                                         action=>"snapshot",
2275                                         hash=>$hash,
2276                                         snapshot_format=>$_
2277                                 )
2278                         }, $known_snapshot_formats{$_}{'display'})
2279                 , @snapshot_fmts) . ")";
2280         } elsif ($num_fmts == 1) {
2281                 # A single "snapshot" link whose tooltip bears the format name.
2282                 # i.e. "_snapshot_"
2283                 my ($fmt) = @snapshot_fmts;
2284                 return
2285                         $cgi->a({
2286                                 -href => href(
2287                                         action=>"snapshot",
2288                                         hash=>$hash,
2289                                         snapshot_format=>$fmt
2290                                 ),
2291                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2292                         }, "snapshot");
2293         } else { # $num_fmts == 0
2294                 return undef;
2295         }
2296 }
2297
2298 ## ......................................................................
2299 ## functions returning values to be passed, perhaps after some
2300 ## transformation, to other functions; e.g. returning arguments to href()
2301
2302 # returns hash to be passed to href to generate gitweb URL
2303 # in -title key it returns description of link
2304 sub get_feed_info {
2305         my $format = shift || 'Atom';
2306         my %res = (action => lc($format));
2307
2308         # feed links are possible only for project views
2309         return unless (defined $project);
2310         # some views should link to OPML, or to generic project feed,
2311         # or don't have specific feed yet (so they should use generic)
2312         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2313
2314         my $branch;
2315         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2316         # from tag links; this also makes possible to detect branch links
2317         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2318             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2319                 $branch = $1;
2320         }
2321         # find log type for feed description (title)
2322         my $type = 'log';
2323         if (defined $file_name) {
2324                 $type  = "history of $file_name";
2325                 $type .= "/" if ($action eq 'tree');
2326                 $type .= " on '$branch'" if (defined $branch);
2327         } else {
2328                 $type = "log of $branch" if (defined $branch);
2329         }
2330
2331         $res{-title} = $type;
2332         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2333         $res{'file_name'} = $file_name;
2334
2335         return %res;
2336 }
2337
2338 ## ----------------------------------------------------------------------
2339 ## git utility subroutines, invoking git commands
2340
2341 # returns path to the core git executable and the --git-dir parameter as list
2342 sub git_cmd {
2343         $number_of_git_cmds++;
2344         return $GIT, '--git-dir='.$git_dir;
2345 }
2346
2347 # quote the given arguments for passing them to the shell
2348 # quote_command("command", "arg 1", "arg with ' and ! characters")
2349 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2350 # Try to avoid using this function wherever possible.
2351 sub quote_command {
2352         return join(' ',
2353                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2354 }
2355
2356 # get HEAD ref of given project as hash
2357 sub git_get_head_hash {
2358         return git_get_full_hash(shift, 'HEAD');
2359 }
2360
2361 sub git_get_full_hash {
2362         return git_get_hash(@_);
2363 }
2364
2365 sub git_get_short_hash {
2366         return git_get_hash(@_, '--short=7');
2367 }
2368
2369 sub git_get_hash {
2370         my ($project, $hash, @options) = @_;
2371         my $o_git_dir = $git_dir;
2372         my $retval = undef;
2373         $git_dir = "$projectroot/$project";
2374         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2375             '--verify', '-q', @options, $hash) {
2376                 $retval = <$fd>;
2377                 chomp $retval if defined $retval;
2378                 close $fd;
2379         }
2380         if (defined $o_git_dir) {
2381                 $git_dir = $o_git_dir;
2382         }
2383         return $retval;
2384 }
2385
2386 # get type of given object
2387 sub git_get_type {
2388         my $hash = shift;
2389
2390         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2391         my $type = <$fd>;
2392         close $fd or return;
2393         chomp $type;
2394         return $type;
2395 }
2396
2397 # repository configuration
2398 our $config_file = '';
2399 our %config;
2400
2401 # store multiple values for single key as anonymous array reference
2402 # single values stored directly in the hash, not as [ <value> ]
2403 sub hash_set_multi {
2404         my ($hash, $key, $value) = @_;
2405
2406         if (!exists $hash->{$key}) {
2407                 $hash->{$key} = $value;
2408         } elsif (!ref $hash->{$key}) {
2409                 $hash->{$key} = [ $hash->{$key}, $value ];
2410         } else {
2411                 push @{$hash->{$key}}, $value;
2412         }
2413 }
2414
2415 # return hash of git project configuration
2416 # optionally limited to some section, e.g. 'gitweb'
2417 sub git_parse_project_config {
2418         my $section_regexp = shift;
2419         my %config;
2420
2421         local $/ = "\0";
2422
2423         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2424                 or return;
2425
2426         while (my $keyval = <$fh>) {
2427                 chomp $keyval;
2428                 my ($key, $value) = split(/\n/, $keyval, 2);
2429
2430                 hash_set_multi(\%config, $key, $value)
2431                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2432         }
2433         close $fh;
2434
2435         return %config;
2436 }
2437
2438 # convert config value to boolean: 'true' or 'false'
2439 # no value, number > 0, 'true' and 'yes' values are true
2440 # rest of values are treated as false (never as error)
2441 sub config_to_bool {
2442         my $val = shift;
2443
2444         return 1 if !defined $val;             # section.key
2445
2446         # strip leading and trailing whitespace
2447         $val =~ s/^\s+//;
2448         $val =~ s/\s+$//;
2449
2450         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2451                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2452 }
2453
2454 # convert config value to simple decimal number
2455 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2456 # to be multiplied by 1024, 1048576, or 1073741824
2457 sub config_to_int {
2458         my $val = shift;
2459
2460         # strip leading and trailing whitespace
2461         $val =~ s/^\s+//;
2462         $val =~ s/\s+$//;
2463
2464         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2465                 $unit = lc($unit);
2466                 # unknown unit is treated as 1
2467                 return $num * ($unit eq 'g' ? 1073741824 :
2468                                $unit eq 'm' ?    1048576 :
2469                                $unit eq 'k' ?       1024 : 1);
2470         }
2471         return $val;
2472 }
2473
2474 # convert config value to array reference, if needed
2475 sub config_to_multi {
2476         my $val = shift;
2477
2478         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2479 }
2480
2481 sub git_get_project_config {
2482         my ($key, $type) = @_;
2483
2484         return unless defined $git_dir;
2485
2486         # key sanity check
2487         return unless ($key);
2488         $key =~ s/^gitweb\.//;
2489         return if ($key =~ m/\W/);
2490
2491         # type sanity check
2492         if (defined $type) {
2493                 $type =~ s/^--//;
2494                 $type = undef
2495                         unless ($type eq 'bool' || $type eq 'int');
2496         }
2497
2498         # get config
2499         if (!defined $config_file ||
2500             $config_file ne "$git_dir/config") {
2501                 %config = git_parse_project_config('gitweb');
2502                 $config_file = "$git_dir/config";
2503         }
2504
2505         # check if config variable (key) exists
2506         return unless exists $config{"gitweb.$key"};
2507
2508         # ensure given type
2509         if (!defined $type) {
2510                 return $config{"gitweb.$key"};
2511         } elsif ($type eq 'bool') {
2512                 # backward compatibility: 'git config --bool' returns true/false
2513                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2514         } elsif ($type eq 'int') {
2515                 return config_to_int($config{"gitweb.$key"});
2516         }
2517         return $config{"gitweb.$key"};
2518 }
2519
2520 # get hash of given path at given ref
2521 sub git_get_hash_by_path {
2522         my $base = shift;
2523         my $path = shift || return undef;
2524         my $type = shift;
2525
2526         $path =~ s,/+$,,;
2527
2528         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2529                 or die_error(500, "Open git-ls-tree failed");
2530         my $line = <$fd>;
2531         close $fd or return undef;
2532
2533         if (!defined $line) {
2534                 # there is no tree or hash given by $path at $base
2535                 return undef;
2536         }
2537
2538         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2539         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2540         if (defined $type && $type ne $2) {
2541                 # type doesn't match
2542                 return undef;
2543         }
2544         return $3;
2545 }
2546
2547 # get path of entry with given hash at given tree-ish (ref)
2548 # used to get 'from' filename for combined diff (merge commit) for renames
2549 sub git_get_path_by_hash {
2550         my $base = shift || return;
2551         my $hash = shift || return;
2552
2553         local $/ = "\0";
2554
2555         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2556                 or return undef;
2557         while (my $line = <$fd>) {
2558                 chomp $line;
2559
2560                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2561                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2562                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2563                         close $fd;
2564                         return $1;
2565                 }
2566         }
2567         close $fd;
2568         return undef;
2569 }
2570
2571 ## ......................................................................
2572 ## git utility functions, directly accessing git repository
2573
2574 # get the value of config variable either from file named as the variable
2575 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2576 # configuration variable in the repository config file.
2577 sub git_get_file_or_project_config {
2578         my ($path, $name) = @_;
2579
2580         $git_dir = "$projectroot/$path";
2581         open my $fd, '<', "$git_dir/$name"
2582                 or return git_get_project_config($name);
2583         my $conf = <$fd>;
2584         close $fd;
2585         if (defined $conf) {
2586                 chomp $conf;
2587         }
2588         return $conf;
2589 }
2590
2591 sub git_get_project_description {
2592         my $path = shift;
2593         return git_get_file_or_project_config($path, 'description');
2594 }
2595
2596 sub git_get_project_category {
2597         my $path = shift;
2598         return git_get_file_or_project_config($path, 'category');
2599 }
2600
2601
2602 # supported formats:
2603 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2604 #   - if its contents is a number, use it as tag weight,
2605 #   - otherwise add a tag with weight 1
2606 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2607 #   the same value multiple times increases tag weight
2608 # * `gitweb.ctag' multi-valued repo config variable
2609 sub git_get_project_ctags {
2610         my $project = shift;
2611         my $ctags = {};
2612
2613         $git_dir = "$projectroot/$project";
2614         if (opendir my $dh, "$git_dir/ctags") {
2615                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2616                 foreach my $tagfile (@files) {
2617                         open my $ct, '<', $tagfile
2618                                 or next;
2619                         my $val = <$ct>;
2620                         chomp $val if $val;
2621                         close $ct;
2622
2623                         (my $ctag = $tagfile) =~ s#.*/##;
2624                         if ($val =~ /\d+/) {
2625                                 $ctags->{$ctag} = $val;
2626                         } else {
2627                                 $ctags->{$ctag} = 1;
2628                         }
2629                 }
2630                 closedir $dh;
2631
2632         } elsif (open my $fh, '<', "$git_dir/ctags") {
2633                 while (my $line = <$fh>) {
2634                         chomp $line;
2635                         $ctags->{$line}++ if $line;
2636                 }
2637                 close $fh;
2638
2639         } else {
2640                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2641                 foreach my $tag (@$taglist) {
2642                         $ctags->{$tag}++;
2643                 }
2644         }
2645
2646         return $ctags;
2647 }
2648
2649 # return hash, where keys are content tags ('ctags'),
2650 # and values are sum of weights of given tag in every project
2651 sub git_gather_all_ctags {
2652         my $projects = shift;
2653         my $ctags = {};
2654
2655         foreach my $p (@$projects) {
2656                 foreach my $ct (keys %{$p->{'ctags'}}) {
2657                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2658                 }
2659         }
2660
2661         return $ctags;
2662 }
2663
2664 sub git_populate_project_tagcloud {
2665         my $ctags = shift;
2666
2667         # First, merge different-cased tags; tags vote on casing
2668         my %ctags_lc;
2669         foreach (keys %$ctags) {
2670                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2671                 if (not $ctags_lc{lc $_}->{topcount}
2672                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2673                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2674                         $ctags_lc{lc $_}->{topname} = $_;
2675                 }
2676         }
2677
2678         my $cloud;
2679         my $matched = $cgi->param('by_tag');
2680         if (eval { require HTML::TagCloud; 1; }) {
2681                 $cloud = HTML::TagCloud->new;
2682                 foreach my $ctag (sort keys %ctags_lc) {
2683                         # Pad the title with spaces so that the cloud looks
2684                         # less crammed.
2685                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2686                         $title =~ s/ /&nbsp;/g;
2687                         $title =~ s/^/&nbsp;/g;
2688                         $title =~ s/$/&nbsp;/g;
2689                         if (defined $matched && $matched eq $ctag) {
2690                                 $title = qq(<span class="match">$title</span>);
2691                         }
2692                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2693                                     $ctags_lc{$ctag}->{count});
2694                 }
2695         } else {
2696                 $cloud = {};
2697                 foreach my $ctag (keys %ctags_lc) {
2698                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2699                         if (defined $matched && $matched eq $ctag) {
2700                                 $title = qq(<span class="match">$title</span>);
2701                         }
2702                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2703                         $cloud->{$ctag}{ctag} =
2704                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2705                 }
2706         }
2707         return $cloud;
2708 }
2709
2710 sub git_show_project_tagcloud {
2711         my ($cloud, $count) = @_;
2712         if (ref $cloud eq 'HTML::TagCloud') {
2713                 return $cloud->html_and_css($count);
2714         } else {
2715                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2716                 return
2717                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2718                         join (', ', map {
2719                                 $cloud->{$_}->{'ctag'}
2720                         } splice(@tags, 0, $count)) .
2721                         '</div>';
2722         }
2723 }
2724
2725 sub git_get_project_url_list {
2726         my $path = shift;
2727
2728         $git_dir = "$projectroot/$path";
2729         open my $fd, '<', "$git_dir/cloneurl"
2730                 or return wantarray ?
2731                 @{ config_to_multi(git_get_project_config('url')) } :
2732                    config_to_multi(git_get_project_config('url'));
2733         my @git_project_url_list = map { chomp; $_ } <$fd>;
2734         close $fd;
2735
2736         return wantarray ? @git_project_url_list : \@git_project_url_list;
2737 }
2738
2739 sub git_get_projects_list {
2740         my $filter = shift || '';
2741         my @list;
2742
2743         $filter =~ s/\.git$//;
2744
2745         if (-d $projects_list) {
2746                 # search in directory
2747                 my $dir = $projects_list;
2748                 # remove the trailing "/"
2749                 $dir =~ s!/+$!!;
2750                 my $pfxlen = length("$projects_list");
2751                 my $pfxdepth = ($projects_list =~ tr!/!!);
2752                 # when filtering, search only given subdirectory
2753                 if ($filter) {
2754                         $dir .= "/$filter";
2755                         $dir =~ s!/+$!!;
2756                 }
2757
2758                 File::Find::find({
2759                         follow_fast => 1, # follow symbolic links
2760                         follow_skip => 2, # ignore duplicates
2761                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2762                         wanted => sub {
2763                                 # global variables
2764                                 our $project_maxdepth;
2765                                 our $projectroot;
2766                                 # skip project-list toplevel, if we get it.
2767                                 return if (m!^[/.]$!);
2768                                 # only directories can be git repositories
2769                                 return unless (-d $_);
2770                                 # don't traverse too deep (Find is super slow on os x)
2771                                 # $project_maxdepth excludes depth of $projectroot
2772                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2773                                         $File::Find::prune = 1;
2774                                         return;
2775                                 }
2776
2777                                 my $path = substr($File::Find::name, $pfxlen + 1);
2778                                 # we check related file in $projectroot
2779                                 if (check_export_ok("$projectroot/$path")) {
2780                                         push @list, { path => $path };
2781                                         $File::Find::prune = 1;
2782                                 }
2783                         },
2784                 }, "$dir");
2785
2786         } elsif (-f $projects_list) {
2787                 # read from file(url-encoded):
2788                 # 'git%2Fgit.git Linus+Torvalds'
2789                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2790                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2791                 open my $fd, '<', $projects_list or return;
2792         PROJECT:
2793                 while (my $line = <$fd>) {
2794                         chomp $line;
2795                         my ($path, $owner) = split ' ', $line;
2796                         $path = unescape($path);
2797                         $owner = unescape($owner);
2798                         if (!defined $path) {
2799                                 next;
2800                         }
2801                         # if $filter is rpovided, check if $path begins with $filter
2802                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2803                                 next;
2804                         }
2805                         if (check_export_ok("$projectroot/$path")) {
2806                                 my $pr = {
2807                                         path => $path,
2808                                         owner => to_utf8($owner),
2809                                 };
2810                                 push @list, $pr;
2811                         }
2812                 }
2813                 close $fd;
2814         }
2815         return @list;
2816 }
2817
2818 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2819 # as side effects it sets 'forks' field to list of forks for forked projects
2820 sub filter_forks_from_projects_list {
2821         my $projects = shift;
2822
2823         my %trie; # prefix tree of directories (path components)
2824         # generate trie out of those directories that might contain forks
2825         foreach my $pr (@$projects) {
2826                 my $path = $pr->{'path'};
2827                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2828                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2829                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2830                 next unless (-d $path);   # containing directory exists
2831                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2832
2833                 # add to trie
2834                 my @dirs = split('/', $path);
2835                 # walk the trie, until either runs out of components or out of trie
2836                 my $ref = \%trie;
2837                 while (scalar @dirs &&
2838                        exists($ref->{$dirs[0]})) {
2839                         $ref = $ref->{shift @dirs};
2840                 }
2841                 # create rest of trie structure from rest of components
2842                 foreach my $dir (@dirs) {
2843                         $ref = $ref->{$dir} = {};
2844                 }
2845                 # create end marker, store $pr as a data
2846                 $ref->{''} = $pr if (!exists $ref->{''});
2847         }
2848
2849         # filter out forks, by finding shortest prefix match for paths
2850         my @filtered;
2851  PROJECT:
2852         foreach my $pr (@$projects) {
2853                 # trie lookup
2854                 my $ref = \%trie;
2855         DIR:
2856                 foreach my $dir (split('/', $pr->{'path'})) {
2857                         if (exists $ref->{''}) {
2858                                 # found [shortest] prefix, is a fork - skip it
2859                                 push @{$ref->{''}{'forks'}}, $pr;
2860                                 next PROJECT;
2861                         }
2862                         if (!exists $ref->{$dir}) {
2863                                 # not in trie, cannot have prefix, not a fork
2864                                 push @filtered, $pr;
2865                                 next PROJECT;
2866                         }
2867                         # If the dir is there, we just walk one step down the trie.
2868                         $ref = $ref->{$dir};
2869                 }
2870                 # we ran out of trie
2871                 # (shouldn't happen: it's either no match, or end marker)
2872                 push @filtered, $pr;
2873         }
2874
2875         return @filtered;
2876 }
2877
2878 # note: fill_project_list_info must be run first,
2879 # for 'descr_long' and 'ctags' to be filled
2880 sub search_projects_list {
2881         my ($projlist, %opts) = @_;
2882         my $tagfilter  = $opts{'tagfilter'};
2883         my $searchtext = $opts{'searchtext'};
2884
2885         return @$projlist
2886                 unless ($tagfilter || $searchtext);
2887
2888         my @projects;
2889  PROJECT:
2890         foreach my $pr (@$projlist) {
2891
2892                 if ($tagfilter) {
2893                         next unless ref($pr->{'ctags'}) eq 'HASH';
2894                         next unless
2895                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2896                 }
2897
2898                 if ($searchtext) {
2899                         next unless
2900                                 $pr->{'path'} =~ /$searchtext/ ||
2901                                 $pr->{'descr_long'} =~ /$searchtext/;
2902                 }
2903
2904                 push @projects, $pr;
2905         }
2906
2907         return @projects;
2908 }
2909
2910 our $gitweb_project_owner = undef;
2911 sub git_get_project_list_from_file {
2912
2913         return if (defined $gitweb_project_owner);
2914
2915         $gitweb_project_owner = {};
2916         # read from file (url-encoded):
2917         # 'git%2Fgit.git Linus+Torvalds'
2918         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2919         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2920         if (-f $projects_list) {
2921                 open(my $fd, '<', $projects_list);
2922                 while (my $line = <$fd>) {
2923                         chomp $line;
2924                         my ($pr, $ow) = split ' ', $line;
2925                         $pr = unescape($pr);
2926                         $ow = unescape($ow);
2927                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2928                 }
2929                 close $fd;
2930         }
2931 }
2932
2933 sub git_get_project_owner {
2934         my $project = shift;
2935         my $owner;
2936
2937         return undef unless $project;
2938         $git_dir = "$projectroot/$project";
2939
2940         if (!defined $gitweb_project_owner) {
2941                 git_get_project_list_from_file();
2942         }
2943
2944         if (exists $gitweb_project_owner->{$project}) {
2945                 $owner = $gitweb_project_owner->{$project};
2946         }
2947         if (!defined $owner){
2948                 $owner = git_get_project_config('owner');
2949         }
2950         if (!defined $owner) {
2951                 $owner = get_file_owner("$git_dir");
2952         }
2953
2954         return $owner;
2955 }
2956
2957 sub git_get_last_activity {
2958         my ($path) = @_;
2959         my $fd;
2960
2961         $git_dir = "$projectroot/$path";
2962         open($fd, "-|", git_cmd(), 'for-each-ref',
2963              '--format=%(committer)',
2964              '--sort=-committerdate',
2965              '--count=1',
2966              'refs/heads') or return;
2967         my $most_recent = <$fd>;
2968         close $fd or return;
2969         if (defined $most_recent &&
2970             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2971                 my $timestamp = $1;
2972                 my $age = time - $timestamp;
2973                 return ($age, age_string($age));
2974         }
2975         return (undef, undef);
2976 }
2977
2978 # Implementation note: when a single remote is wanted, we cannot use 'git
2979 # remote show -n' because that command always work (assuming it's a remote URL
2980 # if it's not defined), and we cannot use 'git remote show' because that would
2981 # try to make a network roundtrip. So the only way to find if that particular
2982 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2983 # and when we find what we want.
2984 sub git_get_remotes_list {
2985         my $wanted = shift;
2986         my %remotes = ();
2987
2988         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2989         return unless $fd;
2990         while (my $remote = <$fd>) {
2991                 chomp $remote;
2992                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2993                 next if $wanted and not $remote eq $wanted;
2994                 my ($url, $key) = ($1, $2);
2995
2996                 $remotes{$remote} ||= { 'heads' => () };
2997                 $remotes{$remote}{$key} = $url;
2998         }
2999         close $fd or return;
3000         return wantarray ? %remotes : \%remotes;
3001 }
3002
3003 # Takes a hash of remotes as first parameter and fills it by adding the
3004 # available remote heads for each of the indicated remotes.
3005 sub fill_remote_heads {
3006         my $remotes = shift;
3007         my @heads = map { "remotes/$_" } keys %$remotes;
3008         my @remoteheads = git_get_heads_list(undef, @heads);
3009         foreach my $remote (keys %$remotes) {
3010                 $remotes->{$remote}{'heads'} = [ grep {
3011                         $_->{'name'} =~ s!^$remote/!!
3012                         } @remoteheads ];
3013         }
3014 }
3015
3016 sub git_get_references {
3017         my $type = shift || "";
3018         my %refs;
3019         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3020         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3021         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3022                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3023                 or return;
3024
3025         while (my $line = <$fd>) {
3026                 chomp $line;
3027                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3028                         if (defined $refs{$1}) {
3029                                 push @{$refs{$1}}, $2;
3030                         } else {
3031                                 $refs{$1} = [ $2 ];
3032                         }
3033                 }
3034         }
3035         close $fd or return;
3036         return \%refs;
3037 }
3038
3039 sub git_get_rev_name_tags {
3040         my $hash = shift || return undef;
3041
3042         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3043                 or return;
3044         my $name_rev = <$fd>;
3045         close $fd;
3046
3047         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3048                 return $1;
3049         } else {
3050                 # catches also '$hash undefined' output
3051                 return undef;
3052         }
3053 }
3054
3055 ## ----------------------------------------------------------------------
3056 ## parse to hash functions
3057
3058 sub parse_date {
3059         my $epoch = shift;
3060         my $tz = shift || "-0000";
3061
3062         my %date;
3063         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3064         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3065         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3066         $date{'hour'} = $hour;
3067         $date{'minute'} = $min;
3068         $date{'mday'} = $mday;
3069         $date{'day'} = $days[$wday];
3070         $date{'month'} = $months[$mon];
3071         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3072                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3073         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3074                              $mday, $months[$mon], $hour ,$min;
3075         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3076                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3077
3078         my ($tz_sign, $tz_hour, $tz_min) =
3079                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3080         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3081         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3082         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3083         $date{'hour_local'} = $hour;
3084         $date{'minute_local'} = $min;
3085         $date{'tz_local'} = $tz;
3086         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3087                                   1900+$year, $mon+1, $mday,
3088                                   $hour, $min, $sec, $tz);
3089         return %date;
3090 }
3091
3092 sub parse_tag {
3093         my $tag_id = shift;
3094         my %tag;
3095         my @comment;
3096
3097         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3098         $tag{'id'} = $tag_id;
3099         while (my $line = <$fd>) {
3100                 chomp $line;
3101                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3102                         $tag{'object'} = $1;
3103                 } elsif ($line =~ m/^type (.+)$/) {
3104                         $tag{'type'} = $1;
3105                 } elsif ($line =~ m/^tag (.+)$/) {
3106                         $tag{'name'} = $1;
3107                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3108                         $tag{'author'} = $1;
3109                         $tag{'author_epoch'} = $2;
3110                         $tag{'author_tz'} = $3;
3111                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3112                                 $tag{'author_name'}  = $1;
3113                                 $tag{'author_email'} = $2;
3114                         } else {
3115                                 $tag{'author_name'} = $tag{'author'};
3116                         }
3117                 } elsif ($line =~ m/--BEGIN/) {
3118                         push @comment, $line;
3119                         last;
3120                 } elsif ($line eq "") {
3121                         last;
3122                 }
3123         }
3124         push @comment, <$fd>;
3125         $tag{'comment'} = \@comment;
3126         close $fd or return;
3127         if (!defined $tag{'name'}) {
3128                 return
3129         };
3130         return %tag
3131 }
3132
3133 sub parse_commit_text {
3134         my ($commit_text, $withparents) = @_;
3135         my @commit_lines = split '\n', $commit_text;
3136         my %co;
3137
3138         pop @commit_lines; # Remove '\0'
3139
3140         if (! @commit_lines) {
3141                 return;
3142         }
3143
3144         my $header = shift @commit_lines;
3145         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3146                 return;
3147         }
3148         ($co{'id'}, my @parents) = split ' ', $header;
3149         while (my $line = shift @commit_lines) {
3150                 last if $line eq "\n";
3151                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3152                         $co{'tree'} = $1;
3153                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3154                         push @parents, $1;
3155                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3156                         $co{'author'} = to_utf8($1);
3157                         $co{'author_epoch'} = $2;
3158                         $co{'author_tz'} = $3;
3159                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3160                                 $co{'author_name'}  = $1;
3161                                 $co{'author_email'} = $2;
3162                         } else {
3163                                 $co{'author_name'} = $co{'author'};
3164                         }
3165                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3166                         $co{'committer'} = to_utf8($1);
3167                         $co{'committer_epoch'} = $2;
3168                         $co{'committer_tz'} = $3;
3169                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3170                                 $co{'committer_name'}  = $1;
3171                                 $co{'committer_email'} = $2;
3172                         } else {
3173                                 $co{'committer_name'} = $co{'committer'};
3174                         }
3175                 }
3176         }
3177         if (!defined $co{'tree'}) {
3178                 return;
3179         };
3180         $co{'parents'} = \@parents;
3181         $co{'parent'} = $parents[0];
3182
3183         foreach my $title (@commit_lines) {
3184                 $title =~ s/^    //;
3185                 if ($title ne "") {
3186                         $co{'title'} = chop_str($title, 80, 5);
3187                         # remove leading stuff of merges to make the interesting part visible
3188                         if (length($title) > 50) {
3189                                 $title =~ s/^Automatic //;
3190                                 $title =~ s/^merge (of|with) /Merge ... /i;
3191                                 if (length($title) > 50) {
3192                                         $title =~ s/(http|rsync):\/\///;
3193                                 }
3194                                 if (length($title) > 50) {
3195                                         $title =~ s/(master|www|rsync)\.//;
3196                                 }
3197                                 if (length($title) > 50) {
3198                                         $title =~ s/kernel.org:?//;
3199                                 }
3200                                 if (length($title) > 50) {
3201                                         $title =~ s/\/pub\/scm//;
3202                                 }
3203                         }
3204                         $co{'title_short'} = chop_str($title, 50, 5);
3205                         last;
3206                 }
3207         }
3208         if (! defined $co{'title'} || $co{'title'} eq "") {
3209                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3210         }
3211         # remove added spaces
3212         foreach my $line (@commit_lines) {
3213                 $line =~ s/^    //;
3214         }
3215         $co{'comment'} = \@commit_lines;
3216
3217         my $age = time - $co{'committer_epoch'};
3218         $co{'age'} = $age;
3219         $co{'age_string'} = age_string($age);
3220         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3221         if ($age > 60*60*24*7*2) {
3222                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3223                 $co{'age_string_age'} = $co{'age_string'};
3224         } else {
3225                 $co{'age_string_date'} = $co{'age_string'};
3226                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3227         }
3228         return %co;
3229 }
3230
3231 sub parse_commit {
3232         my ($commit_id) = @_;
3233         my %co;
3234
3235         local $/ = "\0";
3236
3237         open my $fd, "-|", git_cmd(), "rev-list",
3238                 "--parents",
3239                 "--header",
3240                 "--max-count=1",
3241                 $commit_id,
3242                 "--",
3243                 or die_error(500, "Open git-rev-list failed");
3244         %co = parse_commit_text(<$fd>, 1);
3245         close $fd;
3246
3247         return %co;
3248 }
3249
3250 sub parse_commits {
3251         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3252         my @cos;
3253
3254         $maxcount ||= 1;
3255         $skip ||= 0;
3256
3257         local $/ = "\0";
3258
3259         open my $fd, "-|", git_cmd(), "rev-list",
3260                 "--header",
3261                 @args,
3262                 ("--max-count=" . $maxcount),
3263                 ("--skip=" . $skip),
3264                 @extra_options,
3265                 $commit_id,
3266                 "--",
3267                 ($filename ? ($filename) : ())
3268                 or die_error(500, "Open git-rev-list failed");
3269         while (my $line = <$fd>) {
3270                 my %co = parse_commit_text($line);
3271                 push @cos, \%co;
3272         }
3273         close $fd;
3274
3275         return wantarray ? @cos : \@cos;
3276 }
3277
3278 # parse line of git-diff-tree "raw" output
3279 sub parse_difftree_raw_line {
3280         my $line = shift;
3281         my %res;
3282
3283         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3284         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3285         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3286                 $res{'from_mode'} = $1;
3287                 $res{'to_mode'} = $2;
3288                 $res{'from_id'} = $3;
3289                 $res{'to_id'} = $4;
3290                 $res{'status'} = $5;
3291                 $res{'similarity'} = $6;
3292                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3293                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3294                 } else {
3295                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3296                 }
3297         }
3298         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3299         # combined diff (for merge commit)
3300         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3301                 $res{'nparents'}  = length($1);
3302                 $res{'from_mode'} = [ split(' ', $2) ];
3303                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3304                 $res{'from_id'} = [ split(' ', $3) ];
3305                 $res{'to_id'} = pop @{$res{'from_id'}};
3306                 $res{'status'} = [ split('', $4) ];
3307                 $res{'to_file'} = unquote($5);
3308         }
3309         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3310         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3311                 $res{'commit'} = $1;
3312         }
3313
3314         return wantarray ? %res : \%res;
3315 }
3316
3317 # wrapper: return parsed line of git-diff-tree "raw" output
3318 # (the argument might be raw line, or parsed info)
3319 sub parsed_difftree_line {
3320         my $line_or_ref = shift;
3321
3322         if (ref($line_or_ref) eq "HASH") {
3323                 # pre-parsed (or generated by hand)
3324                 return $line_or_ref;
3325         } else {
3326                 return parse_difftree_raw_line($line_or_ref);
3327         }
3328 }
3329
3330 # parse line of git-ls-tree output
3331 sub parse_ls_tree_line {
3332         my $line = shift;
3333         my %opts = @_;
3334         my %res;
3335
3336         if ($opts{'-l'}) {
3337                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3338                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3339
3340                 $res{'mode'} = $1;
3341                 $res{'type'} = $2;
3342                 $res{'hash'} = $3;
3343                 $res{'size'} = $4;
3344                 if ($opts{'-z'}) {
3345                         $res{'name'} = $5;
3346                 } else {
3347                         $res{'name'} = unquote($5);
3348                 }
3349         } else {
3350                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3351                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3352
3353                 $res{'mode'} = $1;
3354                 $res{'type'} = $2;
3355                 $res{'hash'} = $3;
3356                 if ($opts{'-z'}) {
3357                         $res{'name'} = $4;
3358                 } else {
3359                         $res{'name'} = unquote($4);
3360                 }
3361         }
3362
3363         return wantarray ? %res : \%res;
3364 }
3365
3366 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3367 sub parse_from_to_diffinfo {
3368         my ($diffinfo, $from, $to, @parents) = @_;
3369
3370         if ($diffinfo->{'nparents'}) {
3371                 # combined diff
3372                 $from->{'file'} = [];
3373                 $from->{'href'} = [];
3374                 fill_from_file_info($diffinfo, @parents)
3375                         unless exists $diffinfo->{'from_file'};
3376                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3377                         $from->{'file'}[$i] =
3378                                 defined $diffinfo->{'from_file'}[$i] ?
3379                                         $diffinfo->{'from_file'}[$i] :
3380                                         $diffinfo->{'to_file'};
3381                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3382                                 $from->{'href'}[$i] = href(action=>"blob",
3383                                                            hash_base=>$parents[$i],
3384                                                            hash=>$diffinfo->{'from_id'}[$i],
3385                                                            file_name=>$from->{'file'}[$i]);
3386                         } else {
3387                                 $from->{'href'}[$i] = undef;
3388                         }
3389                 }
3390         } else {
3391                 # ordinary (not combined) diff
3392                 $from->{'file'} = $diffinfo->{'from_file'};
3393                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3394                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3395                                                hash=>$diffinfo->{'from_id'},
3396                                                file_name=>$from->{'file'});
3397                 } else {
3398                         delete $from->{'href'};
3399                 }
3400         }
3401
3402         $to->{'file'} = $diffinfo->{'to_file'};
3403         if (!is_deleted($diffinfo)) { # file exists in result
3404                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3405                                      hash=>$diffinfo->{'to_id'},
3406                                      file_name=>$to->{'file'});
3407         } else {
3408                 delete $to->{'href'};
3409         }
3410 }
3411
3412 ## ......................................................................
3413 ## parse to array of hashes functions
3414
3415 sub git_get_heads_list {
3416         my ($limit, @classes) = @_;
3417         @classes = ('heads') unless @classes;
3418         my @patterns = map { "refs/$_" } @classes;
3419         my @headslist;
3420
3421         open my $fd, '-|', git_cmd(), 'for-each-ref',
3422                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3423                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3424                 @patterns
3425                 or return;
3426         while (my $line = <$fd>) {
3427                 my %ref_item;
3428
3429                 chomp $line;
3430                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3431                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3432                 my ($committer, $epoch, $tz) =
3433                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3434                 $ref_item{'fullname'}  = $name;
3435                 $name =~ s!^refs/(?:head|remote)s/!!;
3436
3437                 $ref_item{'name'}  = $name;
3438                 $ref_item{'id'}    = $hash;
3439                 $ref_item{'title'} = $title || '(no commit message)';
3440                 $ref_item{'epoch'} = $epoch;
3441                 if ($epoch) {
3442                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3443                 } else {
3444                         $ref_item{'age'} = "unknown";
3445                 }
3446
3447                 push @headslist, \%ref_item;
3448         }
3449         close $fd;
3450
3451         return wantarray ? @headslist : \@headslist;
3452 }
3453
3454 sub git_get_tags_list {
3455         my $limit = shift;
3456         my @tagslist;
3457
3458         open my $fd, '-|', git_cmd(), 'for-each-ref',
3459                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3460                 '--format=%(objectname) %(objecttype) %(refname) '.
3461                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3462                 'refs/tags'
3463                 or return;
3464         while (my $line = <$fd>) {
3465                 my %ref_item;
3466
3467                 chomp $line;
3468                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3469                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3470                 my ($creator, $epoch, $tz) =
3471                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3472                 $ref_item{'fullname'} = $name;
3473                 $name =~ s!^refs/tags/!!;
3474
3475                 $ref_item{'type'} = $type;
3476                 $ref_item{'id'} = $id;
3477                 $ref_item{'name'} = $name;
3478                 if ($type eq "tag") {
3479                         $ref_item{'subject'} = $title;
3480                         $ref_item{'reftype'} = $reftype;
3481                         $ref_item{'refid'}   = $refid;
3482                 } else {
3483                         $ref_item{'reftype'} = $type;
3484                         $ref_item{'refid'}   = $id;
3485                 }
3486
3487                 if ($type eq "tag" || $type eq "commit") {
3488                         $ref_item{'epoch'} = $epoch;
3489                         if ($epoch) {
3490                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3491                         } else {
3492                                 $ref_item{'age'} = "unknown";
3493                         }
3494                 }
3495
3496                 push @tagslist, \%ref_item;
3497         }
3498         close $fd;
3499
3500         return wantarray ? @tagslist : \@tagslist;
3501 }
3502
3503 ## ----------------------------------------------------------------------
3504 ## filesystem-related functions
3505
3506 sub get_file_owner {
3507         my $path = shift;
3508
3509         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3510         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3511         if (!defined $gcos) {
3512                 return undef;
3513         }
3514         my $owner = $gcos;
3515         $owner =~ s/[,;].*$//;
3516         return to_utf8($owner);
3517 }
3518
3519 # assume that file exists
3520 sub insert_file {
3521         my $filename = shift;
3522
3523         open my $fd, '<', $filename;
3524         print map { to_utf8($_) } <$fd>;
3525         close $fd;
3526 }
3527
3528 ## ......................................................................
3529 ## mimetype related functions
3530
3531 sub mimetype_guess_file {
3532         my $filename = shift;
3533         my $mimemap = shift;
3534         -r $mimemap or return undef;
3535
3536         my %mimemap;
3537         open(my $mh, '<', $mimemap) or return undef;
3538         while (<$mh>) {
3539                 next if m/^#/; # skip comments
3540                 my ($mimetype, $exts) = split(/\t+/);
3541                 if (defined $exts) {
3542                         my @exts = split(/\s+/, $exts);
3543                         foreach my $ext (@exts) {
3544                                 $mimemap{$ext} = $mimetype;
3545                         }
3546                 }
3547         }
3548         close($mh);
3549
3550         $filename =~ /\.([^.]*)$/;
3551         return $mimemap{$1};
3552 }
3553
3554 sub mimetype_guess {
3555         my $filename = shift;
3556         my $mime;
3557         $filename =~ /\./ or return undef;
3558
3559         if ($mimetypes_file) {
3560                 my $file = $mimetypes_file;
3561                 if ($file !~ m!^/!) { # if it is relative path
3562                         # it is relative to project
3563                         $file = "$projectroot/$project/$file";
3564                 }
3565                 $mime = mimetype_guess_file($filename, $file);
3566         }
3567         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3568         return $mime;
3569 }
3570
3571 sub blob_mimetype {
3572         my $fd = shift;
3573         my $filename = shift;
3574
3575         if ($filename) {
3576                 my $mime = mimetype_guess($filename);
3577                 $mime and return $mime;
3578         }
3579
3580         # just in case
3581         return $default_blob_plain_mimetype unless $fd;
3582
3583         if (-T $fd) {
3584                 return 'text/plain';
3585         } elsif (! $filename) {
3586                 return 'application/octet-stream';
3587         } elsif ($filename =~ m/\.png$/i) {
3588                 return 'image/png';
3589         } elsif ($filename =~ m/\.gif$/i) {
3590                 return 'image/gif';
3591         } elsif ($filename =~ m/\.jpe?g$/i) {
3592                 return 'image/jpeg';
3593         } else {
3594                 return 'application/octet-stream';
3595         }
3596 }
3597
3598 sub blob_contenttype {
3599         my ($fd, $file_name, $type) = @_;
3600
3601         $type ||= blob_mimetype($fd, $file_name);
3602         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3603                 $type .= "; charset=$default_text_plain_charset";
3604         }
3605
3606         return $type;
3607 }
3608
3609 # guess file syntax for syntax highlighting; return undef if no highlighting
3610 # the name of syntax can (in the future) depend on syntax highlighter used
3611 sub guess_file_syntax {
3612         my ($highlight, $mimetype, $file_name) = @_;
3613         return undef unless ($highlight && defined $file_name);
3614         my $basename = basename($file_name, '.in');
3615         return $highlight_basename{$basename}
3616                 if exists $highlight_basename{$basename};
3617
3618         $basename =~ /\.([^.]*)$/;
3619         my $ext = $1 or return undef;
3620         return $highlight_ext{$ext}
3621                 if exists $highlight_ext{$ext};
3622
3623         return undef;
3624 }
3625
3626 # run highlighter and return FD of its output,
3627 # or return original FD if no highlighting
3628 sub run_highlighter {
3629         my ($fd, $highlight, $syntax) = @_;
3630         return $fd unless ($highlight && defined $syntax);
3631
3632         close $fd;
3633         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3634                   quote_command($highlight_bin).
3635                   " --replace-tabs=8 --fragment --syntax $syntax |"
3636                 or die_error(500, "Couldn't open file or run syntax highlighter");
3637         return $fd;
3638 }
3639
3640 ## ======================================================================
3641 ## functions printing HTML: header, footer, error page
3642
3643 sub get_page_title {
3644         my $title = to_utf8($site_name);
3645
3646         return $title unless (defined $project);
3647         $title .= " - " . to_utf8($project);
3648
3649         return $title unless (defined $action);
3650         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3651
3652         return $title unless (defined $file_name);
3653         $title .= " - " . esc_path($file_name);
3654         if ($action eq "tree" && $file_name !~ m|/$|) {
3655                 $title .= "/";
3656         }
3657
3658         return $title;
3659 }
3660
3661 sub print_feed_meta {
3662         if (defined $project) {
3663                 my %href_params = get_feed_info();
3664                 if (!exists $href_params{'-title'}) {
3665                         $href_params{'-title'} = 'log';
3666                 }
3667
3668                 foreach my $format (qw(RSS Atom)) {
3669                         my $type = lc($format);
3670                         my %link_attr = (
3671                                 '-rel' => 'alternate',
3672                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3673                                 '-type' => "application/$type+xml"
3674                         );
3675
3676                         $href_params{'action'} = $type;
3677                         $link_attr{'-href'} = href(%href_params);
3678                         print "<link ".
3679                               "rel=\"$link_attr{'-rel'}\" ".
3680                               "title=\"$link_attr{'-title'}\" ".
3681                               "href=\"$link_attr{'-href'}\" ".
3682                               "type=\"$link_attr{'-type'}\" ".
3683                               "/>\n";
3684
3685                         $href_params{'extra_options'} = '--no-merges';
3686                         $link_attr{'-href'} = href(%href_params);
3687                         $link_attr{'-title'} .= ' (no merges)';
3688                         print "<link ".
3689                               "rel=\"$link_attr{'-rel'}\" ".
3690                               "title=\"$link_attr{'-title'}\" ".
3691                               "href=\"$link_attr{'-href'}\" ".
3692                               "type=\"$link_attr{'-type'}\" ".
3693                               "/>\n";
3694                 }
3695
3696         } else {
3697                 printf('<link rel="alternate" title="%s projects list" '.
3698                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3699                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3700                 printf('<link rel="alternate" title="%s projects feeds" '.
3701                        'href="%s" type="text/x-opml" />'."\n",
3702                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3703         }
3704 }
3705
3706 sub git_header_html {
3707         my $status = shift || "200 OK";
3708         my $expires = shift;
3709         my %opts = @_;
3710
3711         my $title = get_page_title();
3712         my $content_type;
3713         # require explicit support from the UA if we are to send the page as
3714         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3715         # we have to do this because MSIE sometimes globs '*/*', pretending to
3716         # support xhtml+xml but choking when it gets what it asked for.
3717         if (defined $cgi->http('HTTP_ACCEPT') &&
3718             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3719             $cgi->Accept('application/xhtml+xml') != 0) {
3720                 $content_type = 'application/xhtml+xml';
3721         } else {
3722                 $content_type = 'text/html';
3723         }
3724         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3725                            -status=> $status, -expires => $expires)
3726                 unless ($opts{'-no_http_header'});
3727         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3728         print <<EOF;
3729 <?xml version="1.0" encoding="utf-8"?>
3730 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3731 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3732 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3733 <!-- git core binaries version $git_version -->
3734 <head>
3735 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3736 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3737 <meta name="robots" content="index, nofollow"/>
3738 <title>$title</title>
3739 EOF
3740         # the stylesheet, favicon etc urls won't work correctly with path_info
3741         # unless we set the appropriate base URL
3742         if ($ENV{'PATH_INFO'}) {
3743                 print "<base href=\"".esc_url($base_url)."\" />\n";
3744         }
3745         # print out each stylesheet that exist, providing backwards capability
3746         # for those people who defined $stylesheet in a config file
3747         if (defined $stylesheet) {
3748                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3749         } else {
3750                 foreach my $stylesheet (@stylesheets) {
3751                         next unless $stylesheet;
3752                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3753                 }
3754         }
3755         print_feed_meta()
3756                 if ($status eq '200 OK');
3757         if (defined $favicon) {
3758                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3759         }
3760
3761         print "</head>\n" .
3762               "<body>\n";
3763
3764         if (defined $site_header && -f $site_header) {
3765                 insert_file($site_header);
3766         }
3767
3768         print "<div class=\"page_header\">\n";
3769         if (defined $logo) {
3770                 print $cgi->a({-href => esc_url($logo_url),
3771                                -title => $logo_label},
3772                               $cgi->img({-src => esc_url($logo),
3773                                          -width => 72, -height => 27,
3774                                          -alt => "git",
3775                                          -class => "logo"}));
3776         }
3777         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3778         if (defined $project) {
3779                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3780                 if (defined $action) {
3781                         my $action_print = $action ;
3782                         if (defined $opts{-action_extra}) {
3783                                 $action_print = $cgi->a({-href => href(action=>$action)},
3784                                         $action);
3785                         }
3786                         print " / $action_print";
3787                 }
3788                 if (defined $opts{-action_extra}) {
3789                         print " / $opts{-action_extra}";
3790                 }
3791                 print "\n";
3792         }
3793         print "</div>\n";
3794
3795         my $have_search = gitweb_check_feature('search');
3796         if (defined $project && $have_search) {
3797                 if (!defined $searchtext) {
3798                         $searchtext = "";
3799                 }
3800                 my $search_hash;
3801                 if (defined $hash_base) {
3802                         $search_hash = $hash_base;
3803                 } elsif (defined $hash) {
3804                         $search_hash = $hash;
3805                 } else {
3806                         $search_hash = "HEAD";
3807                 }
3808                 my $action = $my_uri;
3809                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3810                 if ($use_pathinfo) {
3811                         $action .= "/".esc_url($project);
3812                 }
3813                 print $cgi->startform(-method => "get", -action => $action) .
3814                       "<div class=\"search\">\n" .
3815                       (!$use_pathinfo &&
3816                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3817                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3818                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3819                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3820                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3821                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3822                       " search:\n",
3823                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3824                       "<span title=\"Extended regular expression\">" .
3825                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3826                                      -checked => $search_use_regexp) .
3827                       "</span>" .
3828                       "</div>" .
3829                       $cgi->end_form() . "\n";
3830         }
3831 }
3832
3833 sub git_footer_html {
3834         my $feed_class = 'rss_logo';
3835
3836         print "<div class=\"page_footer\">\n";
3837         if (defined $project) {
3838                 my $descr = git_get_project_description($project);
3839                 if (defined $descr) {
3840                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3841                 }
3842
3843                 my %href_params = get_feed_info();
3844                 if (!%href_params) {
3845                         $feed_class .= ' generic';
3846                 }
3847                 $href_params{'-title'} ||= 'log';
3848
3849                 foreach my $format (qw(RSS Atom)) {
3850                         $href_params{'action'} = lc($format);
3851                         print $cgi->a({-href => href(%href_params),
3852                                       -title => "$href_params{'-title'} $format feed",
3853                                       -class => $feed_class}, $format)."\n";
3854                 }
3855
3856         } else {
3857                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3858                               -class => $feed_class}, "OPML") . " ";
3859                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3860                               -class => $feed_class}, "TXT") . "\n";
3861         }
3862         print "</div>\n"; # class="page_footer"
3863
3864         if (defined $t0 && gitweb_check_feature('timed')) {
3865                 print "<div id=\"generating_info\">\n";
3866                 print 'This page took '.
3867                       '<span id="generating_time" class="time_span">'.
3868                       tv_interval($t0, [ gettimeofday() ]).
3869                       ' seconds </span>'.
3870                       ' and '.
3871                       '<span id="generating_cmd">'.
3872                       $number_of_git_cmds.
3873                       '</span> git commands '.
3874                       " to generate.\n";
3875                 print "</div>\n"; # class="page_footer"
3876         }
3877
3878         if (defined $site_footer && -f $site_footer) {
3879                 insert_file($site_footer);
3880         }
3881
3882         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3883         if (defined $action &&
3884             $action eq 'blame_incremental') {
3885                 print qq!<script type="text/javascript">\n!.
3886                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3887                       qq!           "!. href() .qq!");\n!.
3888                       qq!</script>\n!;
3889         } else {
3890                 print qq!<script type="text/javascript">\n!.
3891                       qq!window.onload = function () {\n!.
3892                       (gitweb_check_feature('javascript-actions') ?
3893                       qq!       fixLinks();\n! : '').
3894                       # last parameter to onloadTZSetup must be CSS class used by format_timestamp_html
3895                       qq!       var tz_cookie = { name: 'gitweb_tz', expires: 14, path: '/' };\n!. # in days
3896                       qq!       onloadTZSetup('local', tz_cookie, 'datetime');\n!.
3897                       qq!};\n!.
3898                       qq!</script>\n!;
3899         }
3900
3901         print "</body>\n" .
3902               "</html>";
3903 }
3904
3905 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3906 # Example: die_error(404, 'Hash not found')
3907 # By convention, use the following status codes (as defined in RFC 2616):
3908 # 400: Invalid or missing CGI parameters, or
3909 #      requested object exists but has wrong type.
3910 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3911 #      this server or project.
3912 # 404: Requested object/revision/project doesn't exist.
3913 # 500: The server isn't configured properly, or
3914 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3915 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3916 # 503: The server is currently unavailable (because it is overloaded,
3917 #      or down for maintenance).  Generally, this is a temporary state.
3918 sub die_error {
3919         my $status = shift || 500;
3920         my $error = esc_html(shift) || "Internal Server Error";
3921         my $extra = shift;
3922         my %opts = @_;
3923
3924         my %http_responses = (
3925                 400 => '400 Bad Request',
3926                 403 => '403 Forbidden',
3927                 404 => '404 Not Found',
3928                 500 => '500 Internal Server Error',
3929                 503 => '503 Service Unavailable',
3930         );
3931         git_header_html($http_responses{$status}, undef, %opts);
3932         print <<EOF;
3933 <div class="page_body">
3934 <br /><br />
3935 $status - $error
3936 <br />
3937 EOF
3938         if (defined $extra) {
3939                 print "<hr />\n" .
3940                       "$extra\n";
3941         }
3942         print "</div>\n";
3943
3944         git_footer_html();
3945         goto DONE_GITWEB
3946                 unless ($opts{'-error_handler'});
3947 }
3948
3949 ## ----------------------------------------------------------------------
3950 ## functions printing or outputting HTML: navigation
3951
3952 sub git_print_page_nav {
3953         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3954         $extra = '' if !defined $extra; # pager or formats
3955
3956         my @navs = qw(summary shortlog log commit commitdiff tree);
3957         if ($suppress) {
3958                 @navs = grep { $_ ne $suppress } @navs;
3959         }
3960
3961         my %arg = map { $_ => {action=>$_} } @navs;
3962         if (defined $head) {
3963                 for (qw(commit commitdiff)) {
3964                         $arg{$_}{'hash'} = $head;
3965                 }
3966                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3967                         for (qw(shortlog log)) {
3968                                 $arg{$_}{'hash'} = $head;
3969                         }
3970                 }
3971         }
3972
3973         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3974         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3975
3976         my @actions = gitweb_get_feature('actions');
3977         my %repl = (
3978                 '%' => '%',
3979                 'n' => $project,         # project name
3980                 'f' => $git_dir,         # project path within filesystem
3981                 'h' => $treehead || '',  # current hash ('h' parameter)
3982                 'b' => $treebase || '',  # hash base ('hb' parameter)
3983         );
3984         while (@actions) {
3985                 my ($label, $link, $pos) = splice(@actions,0,3);
3986                 # insert
3987                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3988                 # munch munch
3989                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3990                 $arg{$label}{'_href'} = $link;
3991         }
3992
3993         print "<div class=\"page_nav\">\n" .
3994                 (join " | ",
3995                  map { $_ eq $current ?
3996                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3997                  } @navs);
3998         print "<br/>\n$extra<br/>\n" .
3999               "</div>\n";
4000 }
4001
4002 # returns a submenu for the nagivation of the refs views (tags, heads,
4003 # remotes) with the current view disabled and the remotes view only
4004 # available if the feature is enabled
4005 sub format_ref_views {
4006         my ($current) = @_;
4007         my @ref_views = qw{tags heads};
4008         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4009         return join " | ", map {
4010                 $_ eq $current ? $_ :
4011                 $cgi->a({-href => href(action=>$_)}, $_)
4012         } @ref_views
4013 }
4014
4015 sub format_paging_nav {
4016         my ($action, $page, $has_next_link) = @_;
4017         my $paging_nav;
4018
4019
4020         if ($page > 0) {
4021                 $paging_nav .=
4022                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4023                         " &sdot; " .
4024                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4025                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4026         } else {
4027                 $paging_nav .= "first &sdot; prev";
4028         }
4029
4030         if ($has_next_link) {
4031                 $paging_nav .= " &sdot; " .
4032                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4033                                  -accesskey => "n", -title => "Alt-n"}, "next");
4034         } else {
4035                 $paging_nav .= " &sdot; next";
4036         }
4037
4038         return $paging_nav;
4039 }
4040
4041 ## ......................................................................
4042 ## functions printing or outputting HTML: div
4043
4044 sub git_print_header_div {
4045         my ($action, $title, $hash, $hash_base) = @_;
4046         my %args = ();
4047
4048         $args{'action'} = $action;
4049         $args{'hash'} = $hash if $hash;
4050         $args{'hash_base'} = $hash_base if $hash_base;
4051
4052         print "<div class=\"header\">\n" .
4053               $cgi->a({-href => href(%args), -class => "title"},
4054               $title ? $title : $action) .
4055               "\n</div>\n";
4056 }
4057
4058 sub format_repo_url {
4059         my ($name, $url) = @_;
4060         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4061 }
4062
4063 # Group output by placing it in a DIV element and adding a header.
4064 # Options for start_div() can be provided by passing a hash reference as the
4065 # first parameter to the function.
4066 # Options to git_print_header_div() can be provided by passing an array
4067 # reference. This must follow the options to start_div if they are present.
4068 # The content can be a scalar, which is output as-is, a scalar reference, which
4069 # is output after html escaping, an IO handle passed either as *handle or
4070 # *handle{IO}, or a function reference. In the latter case all following
4071 # parameters will be taken as argument to the content function call.
4072 sub git_print_section {
4073         my ($div_args, $header_args, $content);
4074         my $arg = shift;
4075         if (ref($arg) eq 'HASH') {
4076                 $div_args = $arg;
4077                 $arg = shift;
4078         }
4079         if (ref($arg) eq 'ARRAY') {
4080                 $header_args = $arg;
4081                 $arg = shift;
4082         }
4083         $content = $arg;
4084
4085         print $cgi->start_div($div_args);
4086         git_print_header_div(@$header_args);
4087
4088         if (ref($content) eq 'CODE') {
4089                 $content->(@_);
4090         } elsif (ref($content) eq 'SCALAR') {
4091                 print esc_html($$content);
4092         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4093                 print <$content>;
4094         } elsif (!ref($content) && defined($content)) {
4095                 print $content;
4096         }
4097
4098         print $cgi->end_div;
4099 }
4100
4101 sub format_timestamp_html {
4102         my $date = shift;
4103         my $strtime = '<span class="datetime">'.$date->{'rfc2822'}.'</span>';
4104
4105         my $localtime_format = '(%02d:%02d %s)';
4106         if ($date->{'hour_local'} < 6) {
4107                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4108         }
4109         $strtime .= ' ' .
4110                     sprintf($localtime_format,
4111                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4112
4113         return $strtime;
4114 }
4115
4116 # Outputs the author name and date in long form
4117 sub git_print_authorship {
4118         my $co = shift;
4119         my %opts = @_;
4120         my $tag = $opts{-tag} || 'div';
4121         my $author = $co->{'author_name'};
4122
4123         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4124         print "<$tag class=\"author_date\">" .
4125               format_search_author($author, "author", esc_html($author)) .
4126               " [".format_timestamp_html(\%ad)."]".
4127               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4128               "</$tag>\n";
4129 }
4130
4131 # Outputs table rows containing the full author or committer information,
4132 # in the format expected for 'commit' view (& similar).
4133 # Parameters are a commit hash reference, followed by the list of people
4134 # to output information for. If the list is empty it defaults to both
4135 # author and committer.
4136 sub git_print_authorship_rows {
4137         my $co = shift;
4138         # too bad we can't use @people = @_ || ('author', 'committer')
4139         my @people = @_;
4140         @people = ('author', 'committer') unless @people;
4141         foreach my $who (@people) {
4142                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4143                 print "<tr><td>$who</td><td>" .
4144                       format_search_author($co->{"${who}_name"}, $who,
4145                                            esc_html($co->{"${who}_name"})) . " " .
4146                       format_search_author($co->{"${who}_email"}, $who,
4147                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4148                       "</td><td rowspan=\"2\">" .
4149                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4150                       "</td></tr>\n" .
4151                       "<tr>" .
4152                       "<td></td><td>" .
4153                       format_timestamp_html(\%wd) .
4154                       "</td>" .
4155                       "</tr>\n";
4156         }
4157 }
4158
4159 sub git_print_page_path {
4160         my $name = shift;
4161         my $type = shift;
4162         my $hb = shift;
4163
4164
4165         print "<div class=\"page_path\">";
4166         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4167                       -title => 'tree root'}, to_utf8("[$project]"));
4168         print " / ";
4169         if (defined $name) {
4170                 my @dirname = split '/', $name;
4171                 my $basename = pop @dirname;
4172                 my $fullname = '';
4173
4174                 foreach my $dir (@dirname) {
4175                         $fullname .= ($fullname ? '/' : '') . $dir;
4176                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4177                                                      hash_base=>$hb),
4178                                       -title => $fullname}, esc_path($dir));
4179                         print " / ";
4180                 }
4181                 if (defined $type && $type eq 'blob') {
4182                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4183                                                      hash_base=>$hb),
4184                                       -title => $name}, esc_path($basename));
4185                 } elsif (defined $type && $type eq 'tree') {
4186                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4187                                                      hash_base=>$hb),
4188                                       -title => $name}, esc_path($basename));
4189                         print " / ";
4190                 } else {
4191                         print esc_path($basename);
4192                 }
4193         }
4194         print "<br/></div>\n";
4195 }
4196
4197 sub git_print_log {
4198         my $log = shift;
4199         my %opts = @_;
4200
4201         if ($opts{'-remove_title'}) {
4202                 # remove title, i.e. first line of log
4203                 shift @$log;
4204         }
4205         # remove leading empty lines
4206         while (defined $log->[0] && $log->[0] eq "") {
4207                 shift @$log;
4208         }
4209
4210         # print log
4211         my $signoff = 0;
4212         my $empty = 0;
4213         foreach my $line (@$log) {
4214                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4215                         $signoff = 1;
4216                         $empty = 0;
4217                         if (! $opts{'-remove_signoff'}) {
4218                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4219                                 next;
4220                         } else {
4221                                 # remove signoff lines
4222                                 next;
4223                         }
4224                 } else {
4225                         $signoff = 0;
4226                 }
4227
4228                 # print only one empty line
4229                 # do not print empty line after signoff
4230                 if ($line eq "") {
4231                         next if ($empty || $signoff);
4232                         $empty = 1;
4233                 } else {
4234                         $empty = 0;
4235                 }
4236
4237                 print format_log_line_html($line) . "<br/>\n";
4238         }
4239
4240         if ($opts{'-final_empty_line'}) {
4241                 # end with single empty line
4242                 print "<br/>\n" unless $empty;
4243         }
4244 }
4245
4246 # return link target (what link points to)
4247 sub git_get_link_target {
4248         my $hash = shift;
4249         my $link_target;
4250
4251         # read link
4252         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4253                 or return;
4254         {
4255                 local $/ = undef;
4256                 $link_target = <$fd>;
4257         }
4258         close $fd
4259                 or return;
4260
4261         return $link_target;
4262 }
4263
4264 # given link target, and the directory (basedir) the link is in,
4265 # return target of link relative to top directory (top tree);
4266 # return undef if it is not possible (including absolute links).
4267 sub normalize_link_target {
4268         my ($link_target, $basedir) = @_;
4269
4270         # absolute symlinks (beginning with '/') cannot be normalized
4271         return if (substr($link_target, 0, 1) eq '/');
4272
4273         # normalize link target to path from top (root) tree (dir)
4274         my $path;
4275         if ($basedir) {
4276                 $path = $basedir . '/' . $link_target;
4277         } else {
4278                 # we are in top (root) tree (dir)
4279                 $path = $link_target;
4280         }
4281
4282         # remove //, /./, and /../
4283         my @path_parts;
4284         foreach my $part (split('/', $path)) {
4285                 # discard '.' and ''
4286                 next if (!$part || $part eq '.');
4287                 # handle '..'
4288                 if ($part eq '..') {
4289                         if (@path_parts) {
4290                                 pop @path_parts;
4291                         } else {
4292                                 # link leads outside repository (outside top dir)
4293                                 return;
4294                         }
4295                 } else {
4296                         push @path_parts, $part;
4297                 }
4298         }
4299         $path = join('/', @path_parts);
4300
4301         return $path;
4302 }
4303
4304 # print tree entry (row of git_tree), but without encompassing <tr> element
4305 sub git_print_tree_entry {
4306         my ($t, $basedir, $hash_base, $have_blame) = @_;
4307
4308         my %base_key = ();
4309         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4310
4311         # The format of a table row is: mode list link.  Where mode is
4312         # the mode of the entry, list is the name of the entry, an href,
4313         # and link is the action links of the entry.
4314
4315         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4316         if (exists $t->{'size'}) {
4317                 print "<td class=\"size\">$t->{'size'}</td>\n";
4318         }
4319         if ($t->{'type'} eq "blob") {
4320                 print "<td class=\"list\">" .
4321                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4322                                                file_name=>"$basedir$t->{'name'}", %base_key),
4323                                 -class => "list"}, esc_path($t->{'name'}));
4324                 if (S_ISLNK(oct $t->{'mode'})) {
4325                         my $link_target = git_get_link_target($t->{'hash'});
4326                         if ($link_target) {
4327                                 my $norm_target = normalize_link_target($link_target, $basedir);
4328                                 if (defined $norm_target) {
4329                                         print " -> " .
4330                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4331                                                                      file_name=>$norm_target),
4332                                                        -title => $norm_target}, esc_path($link_target));
4333                                 } else {
4334                                         print " -> " . esc_path($link_target);
4335                                 }
4336                         }
4337                 }
4338                 print "</td>\n";
4339                 print "<td class=\"link\">";
4340                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4341                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4342                               "blob");
4343                 if ($have_blame) {
4344                         print " | " .
4345                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4346                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4347                                       "blame");
4348                 }
4349                 if (defined $hash_base) {
4350                         print " | " .
4351                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4352                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4353                                       "history");
4354                 }
4355                 print " | " .
4356                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4357                                                file_name=>"$basedir$t->{'name'}")},
4358                                 "raw");
4359                 print "</td>\n";
4360
4361         } elsif ($t->{'type'} eq "tree") {
4362                 print "<td class=\"list\">";
4363                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4364                                              file_name=>"$basedir$t->{'name'}",
4365                                              %base_key)},
4366                               esc_path($t->{'name'}));
4367                 print "</td>\n";
4368                 print "<td class=\"link\">";
4369                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4370                                              file_name=>"$basedir$t->{'name'}",
4371                                              %base_key)},
4372                               "tree");
4373                 if (defined $hash_base) {
4374                         print " | " .
4375                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4376                                                      file_name=>"$basedir$t->{'name'}")},
4377                                       "history");
4378                 }
4379                 print "</td>\n";
4380         } else {
4381                 # unknown object: we can only present history for it
4382                 # (this includes 'commit' object, i.e. submodule support)
4383                 print "<td class=\"list\">" .
4384                       esc_path($t->{'name'}) .
4385                       "</td>\n";
4386                 print "<td class=\"link\">";
4387                 if (defined $hash_base) {
4388                         print $cgi->a({-href => href(action=>"history",
4389                                                      hash_base=>$hash_base,
4390                                                      file_name=>"$basedir$t->{'name'}")},
4391                                       "history");
4392                 }
4393                 print "</td>\n";
4394         }
4395 }
4396
4397 ## ......................................................................
4398 ## functions printing large fragments of HTML
4399
4400 # get pre-image filenames for merge (combined) diff
4401 sub fill_from_file_info {
4402         my ($diff, @parents) = @_;
4403
4404         $diff->{'from_file'} = [ ];
4405         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4406         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4407                 if ($diff->{'status'}[$i] eq 'R' ||
4408                     $diff->{'status'}[$i] eq 'C') {
4409                         $diff->{'from_file'}[$i] =
4410                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4411                 }
4412         }
4413
4414         return $diff;
4415 }
4416
4417 # is current raw difftree line of file deletion
4418 sub is_deleted {
4419         my $diffinfo = shift;
4420
4421         return $diffinfo->{'to_id'} eq ('0' x 40);
4422 }
4423
4424 # does patch correspond to [previous] difftree raw line
4425 # $diffinfo  - hashref of parsed raw diff format
4426 # $patchinfo - hashref of parsed patch diff format
4427 #              (the same keys as in $diffinfo)
4428 sub is_patch_split {
4429         my ($diffinfo, $patchinfo) = @_;
4430
4431         return defined $diffinfo && defined $patchinfo
4432                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4433 }
4434
4435
4436 sub git_difftree_body {
4437         my ($difftree, $hash, @parents) = @_;
4438         my ($parent) = $parents[0];
4439         my $have_blame = gitweb_check_feature('blame');
4440         print "<div class=\"list_head\">\n";
4441         if ($#{$difftree} > 10) {
4442                 print(($#{$difftree} + 1) . " files changed:\n");
4443         }
4444         print "</div>\n";
4445
4446         print "<table class=\"" .
4447               (@parents > 1 ? "combined " : "") .
4448               "diff_tree\">\n";
4449
4450         # header only for combined diff in 'commitdiff' view
4451         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4452         if ($has_header) {
4453                 # table header
4454                 print "<thead><tr>\n" .
4455                        "<th></th><th></th>\n"; # filename, patchN link
4456                 for (my $i = 0; $i < @parents; $i++) {
4457                         my $par = $parents[$i];
4458                         print "<th>" .
4459                               $cgi->a({-href => href(action=>"commitdiff",
4460                                                      hash=>$hash, hash_parent=>$par),
4461                                        -title => 'commitdiff to parent number ' .
4462                                                   ($i+1) . ': ' . substr($par,0,7)},
4463                                       $i+1) .
4464                               "&nbsp;</th>\n";
4465                 }
4466                 print "</tr></thead>\n<tbody>\n";
4467         }
4468
4469         my $alternate = 1;
4470         my $patchno = 0;
4471         foreach my $line (@{$difftree}) {
4472                 my $diff = parsed_difftree_line($line);
4473
4474                 if ($alternate) {
4475                         print "<tr class=\"dark\">\n";
4476                 } else {
4477                         print "<tr class=\"light\">\n";
4478                 }
4479                 $alternate ^= 1;
4480
4481                 if (exists $diff->{'nparents'}) { # combined diff
4482
4483                         fill_from_file_info($diff, @parents)
4484                                 unless exists $diff->{'from_file'};
4485
4486                         if (!is_deleted($diff)) {
4487                                 # file exists in the result (child) commit
4488                                 print "<td>" .
4489                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4490                                                              file_name=>$diff->{'to_file'},
4491                                                              hash_base=>$hash),
4492                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4493                                       "</td>\n";
4494                         } else {
4495                                 print "<td>" .
4496                                       esc_path($diff->{'to_file'}) .
4497                                       "</td>\n";
4498                         }
4499
4500                         if ($action eq 'commitdiff') {
4501                                 # link to patch
4502                                 $patchno++;
4503                                 print "<td class=\"link\">" .
4504                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4505                                               "patch") .
4506                                       " | " .
4507                                       "</td>\n";
4508                         }
4509
4510                         my $has_history = 0;
4511                         my $not_deleted = 0;
4512                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4513                                 my $hash_parent = $parents[$i];
4514                                 my $from_hash = $diff->{'from_id'}[$i];
4515                                 my $from_path = $diff->{'from_file'}[$i];
4516                                 my $status = $diff->{'status'}[$i];
4517
4518                                 $has_history ||= ($status ne 'A');
4519                                 $not_deleted ||= ($status ne 'D');
4520
4521                                 if ($status eq 'A') {
4522                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4523                                 } elsif ($status eq 'D') {
4524                                         print "<td class=\"link\">" .
4525                                               $cgi->a({-href => href(action=>"blob",
4526                                                                      hash_base=>$hash,
4527                                                                      hash=>$from_hash,
4528                                                                      file_name=>$from_path)},
4529                                                       "blob" . ($i+1)) .
4530                                               " | </td>\n";
4531                                 } else {
4532                                         if ($diff->{'to_id'} eq $from_hash) {
4533                                                 print "<td class=\"link nochange\">";
4534                                         } else {
4535                                                 print "<td class=\"link\">";
4536                                         }
4537                                         print $cgi->a({-href => href(action=>"blobdiff",
4538                                                                      hash=>$diff->{'to_id'},
4539                                                                      hash_parent=>$from_hash,
4540                                                                      hash_base=>$hash,
4541                                                                      hash_parent_base=>$hash_parent,
4542                                                                      file_name=>$diff->{'to_file'},
4543                                                                      file_parent=>$from_path)},
4544                                                       "diff" . ($i+1)) .
4545                                               " | </td>\n";
4546                                 }
4547                         }
4548
4549                         print "<td class=\"link\">";
4550                         if ($not_deleted) {
4551                                 print $cgi->a({-href => href(action=>"blob",
4552                                                              hash=>$diff->{'to_id'},
4553                                                              file_name=>$diff->{'to_file'},
4554                                                              hash_base=>$hash)},
4555                                               "blob");
4556                                 print " | " if ($has_history);
4557                         }
4558                         if ($has_history) {
4559                                 print $cgi->a({-href => href(action=>"history",
4560                                                              file_name=>$diff->{'to_file'},
4561                                                              hash_base=>$hash)},
4562                                               "history");
4563                         }
4564                         print "</td>\n";
4565
4566                         print "</tr>\n";
4567                         next; # instead of 'else' clause, to avoid extra indent
4568                 }
4569                 # else ordinary diff
4570
4571                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4572                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4573                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4574                         $to_mode_oct = oct $diff->{'to_mode'};
4575                         if (S_ISREG($to_mode_oct)) { # only for regular file
4576                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4577                         }
4578                         $to_file_type = file_type($diff->{'to_mode'});
4579                 }
4580                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4581                         $from_mode_oct = oct $diff->{'from_mode'};
4582                         if (S_ISREG($from_mode_oct)) { # only for regular file
4583                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4584                         }
4585                         $from_file_type = file_type($diff->{'from_mode'});
4586                 }
4587
4588                 if ($diff->{'status'} eq "A") { # created
4589                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4590                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4591                         $mode_chng   .= "]</span>";
4592                         print "<td>";
4593                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4594                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4595                                       -class => "list"}, esc_path($diff->{'file'}));
4596                         print "</td>\n";
4597                         print "<td>$mode_chng</td>\n";
4598                         print "<td class=\"link\">";
4599                         if ($action eq 'commitdiff') {
4600                                 # link to patch
4601                                 $patchno++;
4602                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4603                                               "patch") .
4604                                       " | ";
4605                         }
4606                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4607                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4608                                       "blob");
4609                         print "</td>\n";
4610
4611                 } elsif ($diff->{'status'} eq "D") { # deleted
4612                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4613                         print "<td>";
4614                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4615                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4616                                        -class => "list"}, esc_path($diff->{'file'}));
4617                         print "</td>\n";
4618                         print "<td>$mode_chng</td>\n";
4619                         print "<td class=\"link\">";
4620                         if ($action eq 'commitdiff') {
4621                                 # link to patch
4622                                 $patchno++;
4623                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4624                                               "patch") .
4625                                       " | ";
4626                         }
4627                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4628                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4629                                       "blob") . " | ";
4630                         if ($have_blame) {
4631                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4632                                                              file_name=>$diff->{'file'})},
4633                                               "blame") . " | ";
4634                         }
4635                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4636                                                      file_name=>$diff->{'file'})},
4637                                       "history");
4638                         print "</td>\n";
4639
4640                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4641                         my $mode_chnge = "";
4642                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4643                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4644                                 if ($from_file_type ne $to_file_type) {
4645                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4646                                 }
4647                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4648                                         if ($from_mode_str && $to_mode_str) {
4649                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4650                                         } elsif ($to_mode_str) {
4651                                                 $mode_chnge .= " mode: $to_mode_str";
4652                                         }
4653                                 }
4654                                 $mode_chnge .= "]</span>\n";
4655                         }
4656                         print "<td>";
4657                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4658                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4659                                       -class => "list"}, esc_path($diff->{'file'}));
4660                         print "</td>\n";
4661                         print "<td>$mode_chnge</td>\n";
4662                         print "<td class=\"link\">";
4663                         if ($action eq 'commitdiff') {
4664                                 # link to patch
4665                                 $patchno++;
4666                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4667                                               "patch") .
4668                                       " | ";
4669                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4670                                 # "commit" view and modified file (not onlu mode changed)
4671                                 print $cgi->a({-href => href(action=>"blobdiff",
4672                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4673                                                              hash_base=>$hash, hash_parent_base=>$parent,
4674                                                              file_name=>$diff->{'file'})},
4675                                               "diff") .
4676                                       " | ";
4677                         }
4678                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4679                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4680                                        "blob") . " | ";
4681                         if ($have_blame) {
4682                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4683                                                              file_name=>$diff->{'file'})},
4684                                               "blame") . " | ";
4685                         }
4686                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4687                                                      file_name=>$diff->{'file'})},
4688                                       "history");
4689                         print "</td>\n";
4690
4691                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4692                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4693                         my $nstatus = $status_name{$diff->{'status'}};
4694                         my $mode_chng = "";
4695                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4696                                 # mode also for directories, so we cannot use $to_mode_str
4697                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4698                         }
4699                         print "<td>" .
4700                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4701                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4702                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4703                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4704                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4705                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4706                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4707                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4708                               "<td class=\"link\">";
4709                         if ($action eq 'commitdiff') {
4710                                 # link to patch
4711                                 $patchno++;
4712                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4713                                               "patch") .
4714                                       " | ";
4715                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4716                                 # "commit" view and modified file (not only pure rename or copy)
4717                                 print $cgi->a({-href => href(action=>"blobdiff",
4718                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4719                                                              hash_base=>$hash, hash_parent_base=>$parent,
4720                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4721                                               "diff") .
4722                                       " | ";
4723                         }
4724                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4725                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4726                                       "blob") . " | ";
4727                         if ($have_blame) {
4728                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4729                                                              file_name=>$diff->{'to_file'})},
4730                                               "blame") . " | ";
4731                         }
4732                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4733                                                     file_name=>$diff->{'to_file'})},
4734                                       "history");
4735                         print "</td>\n";
4736
4737                 } # we should not encounter Unmerged (U) or Unknown (X) status
4738                 print "</tr>\n";
4739         }
4740         print "</tbody>" if $has_header;
4741         print "</table>\n";
4742 }
4743
4744 sub git_patchset_body {
4745         my ($fd, $difftree, $hash, @hash_parents) = @_;
4746         my ($hash_parent) = $hash_parents[0];
4747
4748         my $is_combined = (@hash_parents > 1);
4749         my $patch_idx = 0;
4750         my $patch_number = 0;
4751         my $patch_line;
4752         my $diffinfo;
4753         my $to_name;
4754         my (%from, %to);
4755
4756         print "<div class=\"patchset\">\n";
4757
4758         # skip to first patch
4759         while ($patch_line = <$fd>) {
4760                 chomp $patch_line;
4761
4762                 last if ($patch_line =~ m/^diff /);
4763         }
4764
4765  PATCH:
4766         while ($patch_line) {
4767
4768                 # parse "git diff" header line
4769                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4770                         # $1 is from_name, which we do not use
4771                         $to_name = unquote($2);
4772                         $to_name =~ s!^b/!!;
4773                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4774                         # $1 is 'cc' or 'combined', which we do not use
4775                         $to_name = unquote($2);
4776                 } else {
4777                         $to_name = undef;
4778                 }
4779
4780                 # check if current patch belong to current raw line
4781                 # and parse raw git-diff line if needed
4782                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4783                         # this is continuation of a split patch
4784                         print "<div class=\"patch cont\">\n";
4785                 } else {
4786                         # advance raw git-diff output if needed
4787                         $patch_idx++ if defined $diffinfo;
4788
4789                         # read and prepare patch information
4790                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4791
4792                         # compact combined diff output can have some patches skipped
4793                         # find which patch (using pathname of result) we are at now;
4794                         if ($is_combined) {
4795                                 while ($to_name ne $diffinfo->{'to_file'}) {
4796                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4797                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4798                                               "</div>\n";  # class="patch"
4799
4800                                         $patch_idx++;
4801                                         $patch_number++;
4802
4803                                         last if $patch_idx > $#$difftree;
4804                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4805                                 }
4806                         }
4807
4808                         # modifies %from, %to hashes
4809                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4810
4811                         # this is first patch for raw difftree line with $patch_idx index
4812                         # we index @$difftree array from 0, but number patches from 1
4813                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4814                 }
4815
4816                 # git diff header
4817                 #assert($patch_line =~ m/^diff /) if DEBUG;
4818                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4819                 $patch_number++;
4820                 # print "git diff" header
4821                 print format_git_diff_header_line($patch_line, $diffinfo,
4822                                                   \%from, \%to);
4823
4824                 # print extended diff header
4825                 print "<div class=\"diff extended_header\">\n";
4826         EXTENDED_HEADER:
4827                 while ($patch_line = <$fd>) {
4828                         chomp $patch_line;
4829
4830                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4831
4832                         print format_extended_diff_header_line($patch_line, $diffinfo,
4833                                                                \%from, \%to);
4834                 }
4835                 print "</div>\n"; # class="diff extended_header"
4836
4837                 # from-file/to-file diff header
4838                 if (! $patch_line) {
4839                         print "</div>\n"; # class="patch"
4840                         last PATCH;
4841                 }
4842                 next PATCH if ($patch_line =~ m/^diff /);
4843                 #assert($patch_line =~ m/^---/) if DEBUG;
4844
4845                 my $last_patch_line = $patch_line;
4846                 $patch_line = <$fd>;
4847                 chomp $patch_line;
4848                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4849
4850                 print format_diff_from_to_header($last_patch_line, $patch_line,
4851                                                  $diffinfo, \%from, \%to,
4852                                                  @hash_parents);
4853
4854                 # the patch itself
4855         LINE:
4856                 while ($patch_line = <$fd>) {
4857                         chomp $patch_line;
4858
4859                         next PATCH if ($patch_line =~ m/^diff /);
4860
4861                         print format_diff_line($patch_line, \%from, \%to);
4862                 }
4863
4864         } continue {
4865                 print "</div>\n"; # class="patch"
4866         }
4867
4868         # for compact combined (--cc) format, with chunk and patch simplification
4869         # the patchset might be empty, but there might be unprocessed raw lines
4870         for (++$patch_idx if $patch_number > 0;
4871              $patch_idx < @$difftree;
4872              ++$patch_idx) {
4873                 # read and prepare patch information
4874                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4875
4876                 # generate anchor for "patch" links in difftree / whatchanged part
4877                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4878                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4879                       "</div>\n";  # class="patch"
4880
4881                 $patch_number++;
4882         }
4883
4884         if ($patch_number == 0) {
4885                 if (@hash_parents > 1) {
4886                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4887                 } else {
4888                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4889                 }
4890         }
4891
4892         print "</div>\n"; # class="patchset"
4893 }
4894
4895 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4896
4897 # fills project list info (age, description, owner, category, forks)
4898 # for each project in the list, removing invalid projects from
4899 # returned list
4900 # NOTE: modifies $projlist, but does not remove entries from it
4901 sub fill_project_list_info {
4902         my $projlist = shift;
4903         my @projects;
4904
4905         my $show_ctags = gitweb_check_feature('ctags');
4906  PROJECT:
4907         foreach my $pr (@$projlist) {
4908                 my (@activity) = git_get_last_activity($pr->{'path'});
4909                 unless (@activity) {
4910                         next PROJECT;
4911                 }
4912                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4913                 if (!defined $pr->{'descr'}) {
4914                         my $descr = git_get_project_description($pr->{'path'}) || "";
4915                         $descr = to_utf8($descr);
4916                         $pr->{'descr_long'} = $descr;
4917                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4918                 }
4919                 if (!defined $pr->{'owner'}) {
4920                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4921                 }
4922                 if ($show_ctags) {
4923                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4924                 }
4925                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
4926                         my $cat = git_get_project_category($pr->{'path'}) ||
4927                                                            $project_list_default_category;
4928                         $pr->{'category'} = to_utf8($cat);
4929                 }
4930
4931                 push @projects, $pr;
4932         }
4933
4934         return @projects;
4935 }
4936
4937 sub sort_projects_list {
4938         my ($projlist, $order) = @_;
4939         my @projects;
4940
4941         my %order_info = (
4942                 project => { key => 'path', type => 'str' },
4943                 descr => { key => 'descr_long', type => 'str' },
4944                 owner => { key => 'owner', type => 'str' },
4945                 age => { key => 'age', type => 'num' }
4946         );
4947         my $oi = $order_info{$order};
4948         return @$projlist unless defined $oi;
4949         if ($oi->{'type'} eq 'str') {
4950                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4951         } else {
4952                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4953         }
4954
4955         return @projects;
4956 }
4957
4958 # returns a hash of categories, containing the list of project
4959 # belonging to each category
4960 sub build_projlist_by_category {
4961         my ($projlist, $from, $to) = @_;
4962         my %categories;
4963
4964         $from = 0 unless defined $from;
4965         $to = $#$projlist if (!defined $to || $#$projlist < $to);
4966
4967         for (my $i = $from; $i <= $to; $i++) {
4968                 my $pr = $projlist->[$i];
4969                 push @{$categories{ $pr->{'category'} }}, $pr;
4970         }
4971
4972         return wantarray ? %categories : \%categories;
4973 }
4974
4975 # print 'sort by' <th> element, generating 'sort by $name' replay link
4976 # if that order is not selected
4977 sub print_sort_th {
4978         print format_sort_th(@_);
4979 }
4980
4981 sub format_sort_th {
4982         my ($name, $order, $header) = @_;
4983         my $sort_th = "";
4984         $header ||= ucfirst($name);
4985
4986         if ($order eq $name) {
4987                 $sort_th .= "<th>$header</th>\n";
4988         } else {
4989                 $sort_th .= "<th>" .
4990                             $cgi->a({-href => href(-replay=>1, order=>$name),
4991                                      -class => "header"}, $header) .
4992                             "</th>\n";
4993         }
4994
4995         return $sort_th;
4996 }
4997
4998 sub git_project_list_rows {
4999         my ($projlist, $from, $to, $check_forks) = @_;
5000
5001         $from = 0 unless defined $from;
5002         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5003
5004         my $alternate = 1;
5005         for (my $i = $from; $i <= $to; $i++) {
5006                 my $pr = $projlist->[$i];
5007
5008                 if ($alternate) {
5009                         print "<tr class=\"dark\">\n";
5010                 } else {
5011                         print "<tr class=\"light\">\n";
5012                 }
5013                 $alternate ^= 1;
5014
5015                 if ($check_forks) {
5016                         print "<td>";
5017                         if ($pr->{'forks'}) {
5018                                 my $nforks = scalar @{$pr->{'forks'}};
5019                                 if ($nforks > 0) {
5020                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5021                                                        -title => "$nforks forks"}, "+");
5022                                 } else {
5023                                         print $cgi->span({-title => "$nforks forks"}, "+");
5024                                 }
5025                         }
5026                         print "</td>\n";
5027                 }
5028                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5029                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5030                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5031                                         -class => "list", -title => $pr->{'descr_long'}},
5032                                         esc_html($pr->{'descr'})) . "</td>\n" .
5033                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5034                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5035                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5036                       "<td class=\"link\">" .
5037                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5038                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5039                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5040                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5041                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5042                       "</td>\n" .
5043                       "</tr>\n";
5044         }
5045 }
5046
5047 sub git_project_list_body {
5048         # actually uses global variable $project
5049         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5050         my @projects = @$projlist;
5051
5052         my $check_forks = gitweb_check_feature('forks');
5053         my $show_ctags  = gitweb_check_feature('ctags');
5054         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5055         $check_forks = undef
5056                 if ($tagfilter || $searchtext);
5057
5058         # filtering out forks before filling info allows to do less work
5059         @projects = filter_forks_from_projects_list(\@projects)
5060                 if ($check_forks);
5061         @projects = fill_project_list_info(\@projects);
5062         # searching projects require filling to be run before it
5063         @projects = search_projects_list(\@projects,
5064                                          'searchtext' => $searchtext,
5065                                          'tagfilter'  => $tagfilter)
5066                 if ($tagfilter || $searchtext);
5067
5068         $order ||= $default_projects_order;
5069         $from = 0 unless defined $from;
5070         $to = $#projects if (!defined $to || $#projects < $to);
5071
5072         # short circuit
5073         if ($from > $to) {
5074                 print "<center>\n".
5075                       "<b>No such projects found</b><br />\n".
5076                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5077                       "</center>\n<br />\n";
5078                 return;
5079         }
5080
5081         @projects = sort_projects_list(\@projects, $order);
5082
5083         if ($show_ctags) {
5084                 my $ctags = git_gather_all_ctags(\@projects);
5085                 my $cloud = git_populate_project_tagcloud($ctags);
5086                 print git_show_project_tagcloud($cloud, 64);
5087         }
5088
5089         print "<table class=\"project_list\">\n";
5090         unless ($no_header) {
5091                 print "<tr>\n";
5092                 if ($check_forks) {
5093                         print "<th></th>\n";
5094                 }
5095                 print_sort_th('project', $order, 'Project');
5096                 print_sort_th('descr', $order, 'Description');
5097                 print_sort_th('owner', $order, 'Owner');
5098                 print_sort_th('age', $order, 'Last Change');
5099                 print "<th></th>\n" . # for links
5100                       "</tr>\n";
5101         }
5102
5103         if ($projects_list_group_categories) {
5104                 # only display categories with projects in the $from-$to window
5105                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5106                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5107                 foreach my $cat (sort keys %categories) {
5108                         unless ($cat eq "") {
5109                                 print "<tr>\n";
5110                                 if ($check_forks) {
5111                                         print "<td></td>\n";
5112                                 }
5113                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5114                                 print "</tr>\n";
5115                         }
5116
5117                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5118                 }
5119         } else {
5120                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5121         }
5122
5123         if (defined $extra) {
5124                 print "<tr>\n";
5125                 if ($check_forks) {
5126                         print "<td></td>\n";
5127                 }
5128                 print "<td colspan=\"5\">$extra</td>\n" .
5129                       "</tr>\n";
5130         }
5131         print "</table>\n";
5132 }
5133
5134 sub git_log_body {
5135         # uses global variable $project
5136         my ($commitlist, $from, $to, $refs, $extra) = @_;
5137
5138         $from = 0 unless defined $from;
5139         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5140
5141         for (my $i = 0; $i <= $to; $i++) {
5142                 my %co = %{$commitlist->[$i]};
5143                 next if !%co;
5144                 my $commit = $co{'id'};
5145                 my $ref = format_ref_marker($refs, $commit);
5146                 git_print_header_div('commit',
5147                                "<span class=\"age\">$co{'age_string'}</span>" .
5148                                esc_html($co{'title'}) . $ref,
5149                                $commit);
5150                 print "<div class=\"title_text\">\n" .
5151                       "<div class=\"log_link\">\n" .
5152                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5153                       " | " .
5154                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5155                       " | " .
5156                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5157                       "<br/>\n" .
5158                       "</div>\n";
5159                       git_print_authorship(\%co, -tag => 'span');
5160                       print "<br/>\n</div>\n";
5161
5162                 print "<div class=\"log_body\">\n";
5163                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5164                 print "</div>\n";
5165         }
5166         if ($extra) {
5167                 print "<div class=\"page_nav\">\n";
5168                 print "$extra\n";
5169                 print "</div>\n";
5170         }
5171 }
5172
5173 sub git_shortlog_body {
5174         # uses global variable $project
5175         my ($commitlist, $from, $to, $refs, $extra) = @_;
5176
5177         $from = 0 unless defined $from;
5178         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5179
5180         print "<table class=\"shortlog\">\n";
5181         my $alternate = 1;
5182         for (my $i = $from; $i <= $to; $i++) {
5183                 my %co = %{$commitlist->[$i]};
5184                 my $commit = $co{'id'};
5185                 my $ref = format_ref_marker($refs, $commit);
5186                 if ($alternate) {
5187                         print "<tr class=\"dark\">\n";
5188                 } else {
5189                         print "<tr class=\"light\">\n";
5190                 }
5191                 $alternate ^= 1;
5192                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5193                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5194                       format_author_html('td', \%co, 10) . "<td>";
5195                 print format_subject_html($co{'title'}, $co{'title_short'},
5196                                           href(action=>"commit", hash=>$commit), $ref);
5197                 print "</td>\n" .
5198                       "<td class=\"link\">" .
5199                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5200                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5201                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5202                 my $snapshot_links = format_snapshot_links($commit);
5203                 if (defined $snapshot_links) {
5204                         print " | " . $snapshot_links;
5205                 }
5206                 print "</td>\n" .
5207                       "</tr>\n";
5208         }
5209         if (defined $extra) {
5210                 print "<tr>\n" .
5211                       "<td colspan=\"4\">$extra</td>\n" .
5212                       "</tr>\n";
5213         }
5214         print "</table>\n";
5215 }
5216
5217 sub git_history_body {
5218         # Warning: assumes constant type (blob or tree) during history
5219         my ($commitlist, $from, $to, $refs, $extra,
5220             $file_name, $file_hash, $ftype) = @_;
5221
5222         $from = 0 unless defined $from;
5223         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5224
5225         print "<table class=\"history\">\n";
5226         my $alternate = 1;
5227         for (my $i = $from; $i <= $to; $i++) {
5228                 my %co = %{$commitlist->[$i]};
5229                 if (!%co) {
5230                         next;
5231                 }
5232                 my $commit = $co{'id'};
5233
5234                 my $ref = format_ref_marker($refs, $commit);
5235
5236                 if ($alternate) {
5237                         print "<tr class=\"dark\">\n";
5238                 } else {
5239                         print "<tr class=\"light\">\n";
5240                 }
5241                 $alternate ^= 1;
5242                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5243         # shortlog:   format_author_html('td', \%co, 10)
5244                       format_author_html('td', \%co, 15, 3) . "<td>";
5245                 # originally git_history used chop_str($co{'title'}, 50)
5246                 print format_subject_html($co{'title'}, $co{'title_short'},
5247                                           href(action=>"commit", hash=>$commit), $ref);
5248                 print "</td>\n" .
5249                       "<td class=\"link\">" .
5250                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5251                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5252
5253                 if ($ftype eq 'blob') {
5254                         my $blob_current = $file_hash;
5255                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5256                         if (defined $blob_current && defined $blob_parent &&
5257                                         $blob_current ne $blob_parent) {
5258                                 print " | " .
5259                                         $cgi->a({-href => href(action=>"blobdiff",
5260                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5261                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5262                                                                file_name=>$file_name)},
5263                                                 "diff to current");
5264                         }
5265                 }
5266                 print "</td>\n" .
5267                       "</tr>\n";
5268         }
5269         if (defined $extra) {
5270                 print "<tr>\n" .
5271                       "<td colspan=\"4\">$extra</td>\n" .
5272                       "</tr>\n";
5273         }
5274         print "</table>\n";
5275 }
5276
5277 sub git_tags_body {
5278         # uses global variable $project
5279         my ($taglist, $from, $to, $extra) = @_;
5280         $from = 0 unless defined $from;
5281         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5282
5283         print "<table class=\"tags\">\n";
5284         my $alternate = 1;
5285         for (my $i = $from; $i <= $to; $i++) {
5286                 my $entry = $taglist->[$i];
5287                 my %tag = %$entry;
5288                 my $comment = $tag{'subject'};
5289                 my $comment_short;
5290                 if (defined $comment) {
5291                         $comment_short = chop_str($comment, 30, 5);
5292                 }
5293                 if ($alternate) {
5294                         print "<tr class=\"dark\">\n";
5295                 } else {
5296                         print "<tr class=\"light\">\n";
5297                 }
5298                 $alternate ^= 1;
5299                 if (defined $tag{'age'}) {
5300                         print "<td><i>$tag{'age'}</i></td>\n";
5301                 } else {
5302                         print "<td></td>\n";
5303                 }
5304                 print "<td>" .
5305                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5306                                -class => "list name"}, esc_html($tag{'name'})) .
5307                       "</td>\n" .
5308                       "<td>";
5309                 if (defined $comment) {
5310                         print format_subject_html($comment, $comment_short,
5311                                                   href(action=>"tag", hash=>$tag{'id'}));
5312                 }
5313                 print "</td>\n" .
5314                       "<td class=\"selflink\">";
5315                 if ($tag{'type'} eq "tag") {
5316                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5317                 } else {
5318                         print "&nbsp;";
5319                 }
5320                 print "</td>\n" .
5321                       "<td class=\"link\">" . " | " .
5322                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5323                 if ($tag{'reftype'} eq "commit") {
5324                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5325                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5326                 } elsif ($tag{'reftype'} eq "blob") {
5327                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5328                 }
5329                 print "</td>\n" .
5330                       "</tr>";
5331         }
5332         if (defined $extra) {
5333                 print "<tr>\n" .
5334                       "<td colspan=\"5\">$extra</td>\n" .
5335                       "</tr>\n";
5336         }
5337         print "</table>\n";
5338 }
5339
5340 sub git_heads_body {
5341         # uses global variable $project
5342         my ($headlist, $head, $from, $to, $extra) = @_;
5343         $from = 0 unless defined $from;
5344         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5345
5346         print "<table class=\"heads\">\n";
5347         my $alternate = 1;
5348         for (my $i = $from; $i <= $to; $i++) {
5349                 my $entry = $headlist->[$i];
5350                 my %ref = %$entry;
5351                 my $curr = $ref{'id'} eq $head;
5352                 if ($alternate) {
5353                         print "<tr class=\"dark\">\n";
5354                 } else {
5355                         print "<tr class=\"light\">\n";
5356                 }
5357                 $alternate ^= 1;
5358                 print "<td><i>$ref{'age'}</i></td>\n" .
5359                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5360                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5361                                -class => "list name"},esc_html($ref{'name'})) .
5362                       "</td>\n" .
5363                       "<td class=\"link\">" .
5364                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5365                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5366                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5367                       "</td>\n" .
5368                       "</tr>";
5369         }
5370         if (defined $extra) {
5371                 print "<tr>\n" .
5372                       "<td colspan=\"3\">$extra</td>\n" .
5373                       "</tr>\n";
5374         }
5375         print "</table>\n";
5376 }
5377
5378 # Display a single remote block
5379 sub git_remote_block {
5380         my ($remote, $rdata, $limit, $head) = @_;
5381
5382         my $heads = $rdata->{'heads'};
5383         my $fetch = $rdata->{'fetch'};
5384         my $push = $rdata->{'push'};
5385
5386         my $urls_table = "<table class=\"projects_list\">\n" ;
5387
5388         if (defined $fetch) {
5389                 if ($fetch eq $push) {
5390                         $urls_table .= format_repo_url("URL", $fetch);
5391                 } else {
5392                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5393                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5394                 }
5395         } elsif (defined $push) {
5396                 $urls_table .= format_repo_url("Push URL", $push);
5397         } else {
5398                 $urls_table .= format_repo_url("", "No remote URL");
5399         }
5400
5401         $urls_table .= "</table>\n";
5402
5403         my $dots;
5404         if (defined $limit && $limit < @$heads) {
5405                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5406         }
5407
5408         print $urls_table;
5409         git_heads_body($heads, $head, 0, $limit, $dots);
5410 }
5411
5412 # Display a list of remote names with the respective fetch and push URLs
5413 sub git_remotes_list {
5414         my ($remotedata, $limit) = @_;
5415         print "<table class=\"heads\">\n";
5416         my $alternate = 1;
5417         my @remotes = sort keys %$remotedata;
5418
5419         my $limited = $limit && $limit < @remotes;
5420
5421         $#remotes = $limit - 1 if $limited;
5422
5423         while (my $remote = shift @remotes) {
5424                 my $rdata = $remotedata->{$remote};
5425                 my $fetch = $rdata->{'fetch'};
5426                 my $push = $rdata->{'push'};
5427                 if ($alternate) {
5428                         print "<tr class=\"dark\">\n";
5429                 } else {
5430                         print "<tr class=\"light\">\n";
5431                 }
5432                 $alternate ^= 1;
5433                 print "<td>" .
5434                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5435                                -class=> "list name"},esc_html($remote)) .
5436                       "</td>";
5437                 print "<td class=\"link\">" .
5438                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5439                       " | " .
5440                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5441                       "</td>";
5442
5443                 print "</tr>\n";
5444         }
5445
5446         if ($limited) {
5447                 print "<tr>\n" .
5448                       "<td colspan=\"3\">" .
5449                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5450                       "</td>\n" . "</tr>\n";
5451         }
5452
5453         print "</table>";
5454 }
5455
5456 # Display remote heads grouped by remote, unless there are too many
5457 # remotes, in which case we only display the remote names
5458 sub git_remotes_body {
5459         my ($remotedata, $limit, $head) = @_;
5460         if ($limit and $limit < keys %$remotedata) {
5461                 git_remotes_list($remotedata, $limit);
5462         } else {
5463                 fill_remote_heads($remotedata);
5464                 while (my ($remote, $rdata) = each %$remotedata) {
5465                         git_print_section({-class=>"remote", -id=>$remote},
5466                                 ["remotes", $remote, $remote], sub {
5467                                         git_remote_block($remote, $rdata, $limit, $head);
5468                                 });
5469                 }
5470         }
5471 }
5472
5473 sub git_search_grep_body {
5474         my ($commitlist, $from, $to, $extra) = @_;
5475         $from = 0 unless defined $from;
5476         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5477
5478         print "<table class=\"commit_search\">\n";
5479         my $alternate = 1;
5480         for (my $i = $from; $i <= $to; $i++) {
5481                 my %co = %{$commitlist->[$i]};
5482                 if (!%co) {
5483                         next;
5484                 }
5485                 my $commit = $co{'id'};
5486                 if ($alternate) {
5487                         print "<tr class=\"dark\">\n";
5488                 } else {
5489                         print "<tr class=\"light\">\n";
5490                 }
5491                 $alternate ^= 1;
5492                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5493                       format_author_html('td', \%co, 15, 5) .
5494                       "<td>" .
5495                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5496                                -class => "list subject"},
5497                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5498                 my $comment = $co{'comment'};
5499                 foreach my $line (@$comment) {
5500                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5501                                 my ($lead, $match, $trail) = ($1, $2, $3);
5502                                 $match = chop_str($match, 70, 5, 'center');
5503                                 my $contextlen = int((80 - length($match))/2);
5504                                 $contextlen = 30 if ($contextlen > 30);
5505                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5506                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5507
5508                                 $lead  = esc_html($lead);
5509                                 $match = esc_html($match);
5510                                 $trail = esc_html($trail);
5511
5512                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5513                         }
5514                 }
5515                 print "</td>\n" .
5516                       "<td class=\"link\">" .
5517                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5518                       " | " .
5519                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5520                       " | " .
5521                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5522                 print "</td>\n" .
5523                       "</tr>\n";
5524         }
5525         if (defined $extra) {
5526                 print "<tr>\n" .
5527                       "<td colspan=\"3\">$extra</td>\n" .
5528                       "</tr>\n";
5529         }
5530         print "</table>\n";
5531 }
5532
5533 ## ======================================================================
5534 ## ======================================================================
5535 ## actions
5536
5537 sub git_project_list {
5538         my $order = $input_params{'order'};
5539         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5540                 die_error(400, "Unknown order parameter");
5541         }
5542
5543         my @list = git_get_projects_list();
5544         if (!@list) {
5545                 die_error(404, "No projects found");
5546         }
5547
5548         git_header_html();
5549         if (defined $home_text && -f $home_text) {
5550                 print "<div class=\"index_include\">\n";
5551                 insert_file($home_text);
5552                 print "</div>\n";
5553         }
5554         print $cgi->startform(-method => "get") .
5555               "<p class=\"projsearch\">Search:\n" .
5556               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5557               "</p>" .
5558               $cgi->end_form() . "\n";
5559         git_project_list_body(\@list, $order);
5560         git_footer_html();
5561 }
5562
5563 sub git_forks {
5564         my $order = $input_params{'order'};
5565         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5566                 die_error(400, "Unknown order parameter");
5567         }
5568
5569         my @list = git_get_projects_list($project);
5570         if (!@list) {
5571                 die_error(404, "No forks found");
5572         }
5573
5574         git_header_html();
5575         git_print_page_nav('','');
5576         git_print_header_div('summary', "$project forks");
5577         git_project_list_body(\@list, $order);
5578         git_footer_html();
5579 }
5580
5581 sub git_project_index {
5582         my @projects = git_get_projects_list();
5583         if (!@projects) {
5584                 die_error(404, "No projects found");
5585         }
5586
5587         print $cgi->header(
5588                 -type => 'text/plain',
5589                 -charset => 'utf-8',
5590                 -content_disposition => 'inline; filename="index.aux"');
5591
5592         foreach my $pr (@projects) {
5593                 if (!exists $pr->{'owner'}) {
5594                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5595                 }
5596
5597                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5598                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5599                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5600                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5601                 $path  =~ s/ /\+/g;
5602                 $owner =~ s/ /\+/g;
5603
5604                 print "$path $owner\n";
5605         }
5606 }
5607
5608 sub git_summary {
5609         my $descr = git_get_project_description($project) || "none";
5610         my %co = parse_commit("HEAD");
5611         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5612         my $head = $co{'id'};
5613         my $remote_heads = gitweb_check_feature('remote_heads');
5614
5615         my $owner = git_get_project_owner($project);
5616
5617         my $refs = git_get_references();
5618         # These get_*_list functions return one more to allow us to see if
5619         # there are more ...
5620         my @taglist  = git_get_tags_list(16);
5621         my @headlist = git_get_heads_list(16);
5622         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5623         my @forklist;
5624         my $check_forks = gitweb_check_feature('forks');
5625
5626         if ($check_forks) {
5627                 # find forks of a project
5628                 @forklist = git_get_projects_list($project);
5629                 # filter out forks of forks
5630                 @forklist = filter_forks_from_projects_list(\@forklist)
5631                         if (@forklist);
5632         }
5633
5634         git_header_html();
5635         git_print_page_nav('summary','', $head);
5636
5637         print "<div class=\"title\">&nbsp;</div>\n";
5638         print "<table class=\"projects_list\">\n" .
5639               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5640               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5641         if (defined $cd{'rfc2822'}) {
5642                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5643                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5644         }
5645
5646         # use per project git URL list in $projectroot/$project/cloneurl
5647         # or make project git URL from git base URL and project name
5648         my $url_tag = "URL";
5649         my @url_list = git_get_project_url_list($project);
5650         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5651         foreach my $git_url (@url_list) {
5652                 next unless $git_url;
5653                 print format_repo_url($url_tag, $git_url);
5654                 $url_tag = "";
5655         }
5656
5657         # Tag cloud
5658         my $show_ctags = gitweb_check_feature('ctags');
5659         if ($show_ctags) {
5660                 my $ctags = git_get_project_ctags($project);
5661                 if (%$ctags) {
5662                         # without ability to add tags, don't show if there are none
5663                         my $cloud = git_populate_project_tagcloud($ctags);
5664                         print "<tr id=\"metadata_ctags\">" .
5665                               "<td>content tags</td>" .
5666                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5667                               "</tr>\n";
5668                 }
5669         }
5670
5671         print "</table>\n";
5672
5673         # If XSS prevention is on, we don't include README.html.
5674         # TODO: Allow a readme in some safe format.
5675         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5676                 print "<div class=\"title\">readme</div>\n" .
5677                       "<div class=\"readme\">\n";
5678                 insert_file("$projectroot/$project/README.html");
5679                 print "\n</div>\n"; # class="readme"
5680         }
5681
5682         # we need to request one more than 16 (0..15) to check if
5683         # those 16 are all
5684         my @commitlist = $head ? parse_commits($head, 17) : ();
5685         if (@commitlist) {
5686                 git_print_header_div('shortlog');
5687                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5688                                   $#commitlist <=  15 ? undef :
5689                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5690         }
5691
5692         if (@taglist) {
5693                 git_print_header_div('tags');
5694                 git_tags_body(\@taglist, 0, 15,
5695                               $#taglist <=  15 ? undef :
5696                               $cgi->a({-href => href(action=>"tags")}, "..."));
5697         }
5698
5699         if (@headlist) {
5700                 git_print_header_div('heads');
5701                 git_heads_body(\@headlist, $head, 0, 15,
5702                                $#headlist <= 15 ? undef :
5703                                $cgi->a({-href => href(action=>"heads")}, "..."));
5704         }
5705
5706         if (%remotedata) {
5707                 git_print_header_div('remotes');
5708                 git_remotes_body(\%remotedata, 15, $head);
5709         }
5710
5711         if (@forklist) {
5712                 git_print_header_div('forks');
5713                 git_project_list_body(\@forklist, 'age', 0, 15,
5714                                       $#forklist <= 15 ? undef :
5715                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5716                                       'no_header');
5717         }
5718
5719         git_footer_html();
5720 }
5721
5722 sub git_tag {
5723         my %tag = parse_tag($hash);
5724
5725         if (! %tag) {
5726                 die_error(404, "Unknown tag object");
5727         }
5728
5729         my $head = git_get_head_hash($project);
5730         git_header_html();
5731         git_print_page_nav('','', $head,undef,$head);
5732         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5733         print "<div class=\"title_text\">\n" .
5734               "<table class=\"object_header\">\n" .
5735               "<tr>\n" .
5736               "<td>object</td>\n" .
5737               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5738                                $tag{'object'}) . "</td>\n" .
5739               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5740                                               $tag{'type'}) . "</td>\n" .
5741               "</tr>\n";
5742         if (defined($tag{'author'})) {
5743                 git_print_authorship_rows(\%tag, 'author');
5744         }
5745         print "</table>\n\n" .
5746               "</div>\n";
5747         print "<div class=\"page_body\">";
5748         my $comment = $tag{'comment'};
5749         foreach my $line (@$comment) {
5750                 chomp $line;
5751                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5752         }
5753         print "</div>\n";
5754         git_footer_html();
5755 }
5756
5757 sub git_blame_common {
5758         my $format = shift || 'porcelain';
5759         if ($format eq 'porcelain' && $cgi->param('js')) {
5760                 $format = 'incremental';
5761                 $action = 'blame_incremental'; # for page title etc
5762         }
5763
5764         # permissions
5765         gitweb_check_feature('blame')
5766                 or die_error(403, "Blame view not allowed");
5767
5768         # error checking
5769         die_error(400, "No file name given") unless $file_name;
5770         $hash_base ||= git_get_head_hash($project);
5771         die_error(404, "Couldn't find base commit") unless $hash_base;
5772         my %co = parse_commit($hash_base)
5773                 or die_error(404, "Commit not found");
5774         my $ftype = "blob";
5775         if (!defined $hash) {
5776                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5777                         or die_error(404, "Error looking up file");
5778         } else {
5779                 $ftype = git_get_type($hash);
5780                 if ($ftype !~ "blob") {
5781                         die_error(400, "Object is not a blob");
5782                 }
5783         }
5784
5785         my $fd;
5786         if ($format eq 'incremental') {
5787                 # get file contents (as base)
5788                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5789                         or die_error(500, "Open git-cat-file failed");
5790         } elsif ($format eq 'data') {
5791                 # run git-blame --incremental
5792                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5793                         $hash_base, "--", $file_name
5794                         or die_error(500, "Open git-blame --incremental failed");
5795         } else {
5796                 # run git-blame --porcelain
5797                 open $fd, "-|", git_cmd(), "blame", '-p',
5798                         $hash_base, '--', $file_name
5799                         or die_error(500, "Open git-blame --porcelain failed");
5800         }
5801
5802         # incremental blame data returns early
5803         if ($format eq 'data') {
5804                 print $cgi->header(
5805                         -type=>"text/plain", -charset => "utf-8",
5806                         -status=> "200 OK");
5807                 local $| = 1; # output autoflush
5808                 print while <$fd>;
5809                 close $fd
5810                         or print "ERROR $!\n";
5811
5812                 print 'END';
5813                 if (defined $t0 && gitweb_check_feature('timed')) {
5814                         print ' '.
5815                               tv_interval($t0, [ gettimeofday() ]).
5816                               ' '.$number_of_git_cmds;
5817                 }
5818                 print "\n";
5819
5820                 return;
5821         }
5822
5823         # page header
5824         git_header_html();
5825         my $formats_nav =
5826                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5827                         "blob") .
5828                 " | ";
5829         if ($format eq 'incremental') {
5830                 $formats_nav .=
5831                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5832                                 "blame") . " (non-incremental)";
5833         } else {
5834                 $formats_nav .=
5835                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5836                                 "blame") . " (incremental)";
5837         }
5838         $formats_nav .=
5839                 " | " .
5840                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5841                         "history") .
5842                 " | " .
5843                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5844                         "HEAD");
5845         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5846         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5847         git_print_page_path($file_name, $ftype, $hash_base);
5848
5849         # page body
5850         if ($format eq 'incremental') {
5851                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5852                       "This page requires JavaScript to run.\n Use ".
5853                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5854                               'this page').
5855                       " instead.\n".
5856                       "</b></center></div>\n</noscript>\n";
5857
5858                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5859         }
5860
5861         print qq!<div class="page_body">\n!;
5862         print qq!<div id="progress_info">... / ...</div>\n!
5863                 if ($format eq 'incremental');
5864         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5865               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5866               qq!<thead>\n!.
5867               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5868               qq!</thead>\n!.
5869               qq!<tbody>\n!;
5870
5871         my @rev_color = qw(light dark);
5872         my $num_colors = scalar(@rev_color);
5873         my $current_color = 0;
5874
5875         if ($format eq 'incremental') {
5876                 my $color_class = $rev_color[$current_color];
5877
5878                 #contents of a file
5879                 my $linenr = 0;
5880         LINE:
5881                 while (my $line = <$fd>) {
5882                         chomp $line;
5883                         $linenr++;
5884
5885                         print qq!<tr id="l$linenr" class="$color_class">!.
5886                               qq!<td class="sha1"><a href=""> </a></td>!.
5887                               qq!<td class="linenr">!.
5888                               qq!<a class="linenr" href="">$linenr</a></td>!;
5889                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5890                         print qq!</tr>\n!;
5891                 }
5892
5893         } else { # porcelain, i.e. ordinary blame
5894                 my %metainfo = (); # saves information about commits
5895
5896                 # blame data
5897         LINE:
5898                 while (my $line = <$fd>) {
5899                         chomp $line;
5900                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5901                         # no <lines in group> for subsequent lines in group of lines
5902                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5903                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5904                         if (!exists $metainfo{$full_rev}) {
5905                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5906                         }
5907                         my $meta = $metainfo{$full_rev};
5908                         my $data;
5909                         while ($data = <$fd>) {
5910                                 chomp $data;
5911                                 last if ($data =~ s/^\t//); # contents of line
5912                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5913                                         $meta->{$1} = $2 unless exists $meta->{$1};
5914                                 }
5915                                 if ($data =~ /^previous /) {
5916                                         $meta->{'nprevious'}++;
5917                                 }
5918                         }
5919                         my $short_rev = substr($full_rev, 0, 8);
5920                         my $author = $meta->{'author'};
5921                         my %date =
5922                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5923                         my $date = $date{'iso-tz'};
5924                         if ($group_size) {
5925                                 $current_color = ($current_color + 1) % $num_colors;
5926                         }
5927                         my $tr_class = $rev_color[$current_color];
5928                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5929                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5930                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5931                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5932                         if ($group_size) {
5933                                 print "<td class=\"sha1\"";
5934                                 print " title=\"". esc_html($author) . ", $date\"";
5935                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5936                                 print ">";
5937                                 print $cgi->a({-href => href(action=>"commit",
5938                                                              hash=>$full_rev,
5939                                                              file_name=>$file_name)},
5940                                               esc_html($short_rev));
5941                                 if ($group_size >= 2) {
5942                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5943                                         if (@author_initials) {
5944                                                 print "<br />" .
5945                                                       esc_html(join('', @author_initials));
5946                                                 #           or join('.', ...)
5947                                         }
5948                                 }
5949                                 print "</td>\n";
5950                         }
5951                         # 'previous' <sha1 of parent commit> <filename at commit>
5952                         if (exists $meta->{'previous'} &&
5953                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5954                                 $meta->{'parent'} = $1;
5955                                 $meta->{'file_parent'} = unquote($2);
5956                         }
5957                         my $linenr_commit =
5958                                 exists($meta->{'parent'}) ?
5959                                 $meta->{'parent'} : $full_rev;
5960                         my $linenr_filename =
5961                                 exists($meta->{'file_parent'}) ?
5962                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5963                         my $blamed = href(action => 'blame',
5964                                           file_name => $linenr_filename,
5965                                           hash_base => $linenr_commit);
5966                         print "<td class=\"linenr\">";
5967                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5968                                         -class => "linenr" },
5969                                       esc_html($lineno));
5970                         print "</td>";
5971                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5972                         print "</tr>\n";
5973                 } # end while
5974
5975         }
5976
5977         # footer
5978         print "</tbody>\n".
5979               "</table>\n"; # class="blame"
5980         print "</div>\n";   # class="blame_body"
5981         close $fd
5982                 or print "Reading blob failed\n";
5983
5984         git_footer_html();
5985 }
5986
5987 sub git_blame {
5988         git_blame_common();
5989 }
5990
5991 sub git_blame_incremental {
5992         git_blame_common('incremental');
5993 }
5994
5995 sub git_blame_data {
5996         git_blame_common('data');
5997 }
5998
5999 sub git_tags {
6000         my $head = git_get_head_hash($project);
6001         git_header_html();
6002         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6003         git_print_header_div('summary', $project);
6004
6005         my @tagslist = git_get_tags_list();
6006         if (@tagslist) {
6007                 git_tags_body(\@tagslist);
6008         }
6009         git_footer_html();
6010 }
6011
6012 sub git_heads {
6013         my $head = git_get_head_hash($project);
6014         git_header_html();
6015         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6016         git_print_header_div('summary', $project);
6017
6018         my @headslist = git_get_heads_list();
6019         if (@headslist) {
6020                 git_heads_body(\@headslist, $head);
6021         }
6022         git_footer_html();
6023 }
6024
6025 # used both for single remote view and for list of all the remotes
6026 sub git_remotes {
6027         gitweb_check_feature('remote_heads')
6028                 or die_error(403, "Remote heads view is disabled");
6029
6030         my $head = git_get_head_hash($project);
6031         my $remote = $input_params{'hash'};
6032
6033         my $remotedata = git_get_remotes_list($remote);
6034         die_error(500, "Unable to get remote information") unless defined $remotedata;
6035
6036         unless (%$remotedata) {
6037                 die_error(404, defined $remote ?
6038                         "Remote $remote not found" :
6039                         "No remotes found");
6040         }
6041
6042         git_header_html(undef, undef, -action_extra => $remote);
6043         git_print_page_nav('', '',  $head, undef, $head,
6044                 format_ref_views($remote ? '' : 'remotes'));
6045
6046         fill_remote_heads($remotedata);
6047         if (defined $remote) {
6048                 git_print_header_div('remotes', "$remote remote for $project");
6049                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6050         } else {
6051                 git_print_header_div('summary', "$project remotes");
6052                 git_remotes_body($remotedata, undef, $head);
6053         }
6054
6055         git_footer_html();
6056 }
6057
6058 sub git_blob_plain {
6059         my $type = shift;
6060         my $expires;
6061
6062         if (!defined $hash) {
6063                 if (defined $file_name) {
6064                         my $base = $hash_base || git_get_head_hash($project);
6065                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6066                                 or die_error(404, "Cannot find file");
6067                 } else {
6068                         die_error(400, "No file name defined");
6069                 }
6070         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6071                 # blobs defined by non-textual hash id's can be cached
6072                 $expires = "+1d";
6073         }
6074
6075         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6076                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6077
6078         # content-type (can include charset)
6079         $type = blob_contenttype($fd, $file_name, $type);
6080
6081         # "save as" filename, even when no $file_name is given
6082         my $save_as = "$hash";
6083         if (defined $file_name) {
6084                 $save_as = $file_name;
6085         } elsif ($type =~ m/^text\//) {
6086                 $save_as .= '.txt';
6087         }
6088
6089         # With XSS prevention on, blobs of all types except a few known safe
6090         # ones are served with "Content-Disposition: attachment" to make sure
6091         # they don't run in our security domain.  For certain image types,
6092         # blob view writes an <img> tag referring to blob_plain view, and we
6093         # want to be sure not to break that by serving the image as an
6094         # attachment (though Firefox 3 doesn't seem to care).
6095         my $sandbox = $prevent_xss &&
6096                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
6097
6098         print $cgi->header(
6099                 -type => $type,
6100                 -expires => $expires,
6101                 -content_disposition =>
6102                         ($sandbox ? 'attachment' : 'inline')
6103                         . '; filename="' . $save_as . '"');
6104         local $/ = undef;
6105         binmode STDOUT, ':raw';
6106         print <$fd>;
6107         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6108         close $fd;
6109 }
6110
6111 sub git_blob {
6112         my $expires;
6113
6114         if (!defined $hash) {
6115                 if (defined $file_name) {
6116                         my $base = $hash_base || git_get_head_hash($project);
6117                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6118                                 or die_error(404, "Cannot find file");
6119                 } else {
6120                         die_error(400, "No file name defined");
6121                 }
6122         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6123                 # blobs defined by non-textual hash id's can be cached
6124                 $expires = "+1d";
6125         }
6126
6127         my $have_blame = gitweb_check_feature('blame');
6128         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6129                 or die_error(500, "Couldn't cat $file_name, $hash");
6130         my $mimetype = blob_mimetype($fd, $file_name);
6131         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6132         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6133                 close $fd;
6134                 return git_blob_plain($mimetype);
6135         }
6136         # we can have blame only for text/* mimetype
6137         $have_blame &&= ($mimetype =~ m!^text/!);
6138
6139         my $highlight = gitweb_check_feature('highlight');
6140         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6141         $fd = run_highlighter($fd, $highlight, $syntax)
6142                 if $syntax;
6143
6144         git_header_html(undef, $expires);
6145         my $formats_nav = '';
6146         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6147                 if (defined $file_name) {
6148                         if ($have_blame) {
6149                                 $formats_nav .=
6150                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6151                                                 "blame") .
6152                                         " | ";
6153                         }
6154                         $formats_nav .=
6155                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6156                                         "history") .
6157                                 " | " .
6158                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6159                                         "raw") .
6160                                 " | " .
6161                                 $cgi->a({-href => href(action=>"blob",
6162                                                        hash_base=>"HEAD", file_name=>$file_name)},
6163                                         "HEAD");
6164                 } else {
6165                         $formats_nav .=
6166                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6167                                         "raw");
6168                 }
6169                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6170                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6171         } else {
6172                 print "<div class=\"page_nav\">\n" .
6173                       "<br/><br/></div>\n" .
6174                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6175         }
6176         git_print_page_path($file_name, "blob", $hash_base);
6177         print "<div class=\"page_body\">\n";
6178         if ($mimetype =~ m!^image/!) {
6179                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6180                 if ($file_name) {
6181                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6182                 }
6183                 print qq! src="! .
6184                       href(action=>"blob_plain", hash=>$hash,
6185                            hash_base=>$hash_base, file_name=>$file_name) .
6186                       qq!" />\n!;
6187         } else {
6188                 my $nr;
6189                 while (my $line = <$fd>) {
6190                         chomp $line;
6191                         $nr++;
6192                         $line = untabify($line);
6193                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6194                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6195                 }
6196         }
6197         close $fd
6198                 or print "Reading blob failed.\n";
6199         print "</div>";
6200         git_footer_html();
6201 }
6202
6203 sub git_tree {
6204         if (!defined $hash_base) {
6205                 $hash_base = "HEAD";
6206         }
6207         if (!defined $hash) {
6208                 if (defined $file_name) {
6209                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6210                 } else {
6211                         $hash = $hash_base;
6212                 }
6213         }
6214         die_error(404, "No such tree") unless defined($hash);
6215
6216         my $show_sizes = gitweb_check_feature('show-sizes');
6217         my $have_blame = gitweb_check_feature('blame');
6218
6219         my @entries = ();
6220         {
6221                 local $/ = "\0";
6222                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6223                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6224                         or die_error(500, "Open git-ls-tree failed");
6225                 @entries = map { chomp; $_ } <$fd>;
6226                 close $fd
6227                         or die_error(404, "Reading tree failed");
6228         }
6229
6230         my $refs = git_get_references();
6231         my $ref = format_ref_marker($refs, $hash_base);
6232         git_header_html();
6233         my $basedir = '';
6234         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6235                 my @views_nav = ();
6236                 if (defined $file_name) {
6237                         push @views_nav,
6238                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6239                                         "history"),
6240                                 $cgi->a({-href => href(action=>"tree",
6241                                                        hash_base=>"HEAD", file_name=>$file_name)},
6242                                         "HEAD"),
6243                 }
6244                 my $snapshot_links = format_snapshot_links($hash);
6245                 if (defined $snapshot_links) {
6246                         # FIXME: Should be available when we have no hash base as well.
6247                         push @views_nav, $snapshot_links;
6248                 }
6249                 git_print_page_nav('tree','', $hash_base, undef, undef,
6250                                    join(' | ', @views_nav));
6251                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6252         } else {
6253                 undef $hash_base;
6254                 print "<div class=\"page_nav\">\n";
6255                 print "<br/><br/></div>\n";
6256                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6257         }
6258         if (defined $file_name) {
6259                 $basedir = $file_name;
6260                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6261                         $basedir .= '/';
6262                 }
6263                 git_print_page_path($file_name, 'tree', $hash_base);
6264         }
6265         print "<div class=\"page_body\">\n";
6266         print "<table class=\"tree\">\n";
6267         my $alternate = 1;
6268         # '..' (top directory) link if possible
6269         if (defined $hash_base &&
6270             defined $file_name && $file_name =~ m![^/]+$!) {
6271                 if ($alternate) {
6272                         print "<tr class=\"dark\">\n";
6273                 } else {
6274                         print "<tr class=\"light\">\n";
6275                 }
6276                 $alternate ^= 1;
6277
6278                 my $up = $file_name;
6279                 $up =~ s!/?[^/]+$!!;
6280                 undef $up unless $up;
6281                 # based on git_print_tree_entry
6282                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6283                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6284                 print '<td class="list">';
6285                 print $cgi->a({-href => href(action=>"tree",
6286                                              hash_base=>$hash_base,
6287                                              file_name=>$up)},
6288                               "..");
6289                 print "</td>\n";
6290                 print "<td class=\"link\"></td>\n";
6291
6292                 print "</tr>\n";
6293         }
6294         foreach my $line (@entries) {
6295                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6296
6297                 if ($alternate) {
6298                         print "<tr class=\"dark\">\n";
6299                 } else {
6300                         print "<tr class=\"light\">\n";
6301                 }
6302                 $alternate ^= 1;
6303
6304                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6305
6306                 print "</tr>\n";
6307         }
6308         print "</table>\n" .
6309               "</div>";
6310         git_footer_html();
6311 }
6312
6313 sub snapshot_name {
6314         my ($project, $hash) = @_;
6315
6316         # path/to/project.git  -> project
6317         # path/to/project/.git -> project
6318         my $name = to_utf8($project);
6319         $name =~ s,([^/])/*\.git$,$1,;
6320         $name = basename($name);
6321         # sanitize name
6322         $name =~ s/[[:cntrl:]]/?/g;
6323
6324         my $ver = $hash;
6325         if ($hash =~ /^[0-9a-fA-F]+$/) {
6326                 # shorten SHA-1 hash
6327                 my $full_hash = git_get_full_hash($project, $hash);
6328                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6329                         $ver = git_get_short_hash($project, $hash);
6330                 }
6331         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6332                 # tags don't need shortened SHA-1 hash
6333                 $ver = $1;
6334         } else {
6335                 # branches and other need shortened SHA-1 hash
6336                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6337                         $ver = $1;
6338                 }
6339                 $ver .= '-' . git_get_short_hash($project, $hash);
6340         }
6341         # in case of hierarchical branch names
6342         $ver =~ s!/!.!g;
6343
6344         # name = project-version_string
6345         $name = "$name-$ver";
6346
6347         return wantarray ? ($name, $name) : $name;
6348 }
6349
6350 sub git_snapshot {
6351         my $format = $input_params{'snapshot_format'};
6352         if (!@snapshot_fmts) {
6353                 die_error(403, "Snapshots not allowed");
6354         }
6355         # default to first supported snapshot format
6356         $format ||= $snapshot_fmts[0];
6357         if ($format !~ m/^[a-z0-9]+$/) {
6358                 die_error(400, "Invalid snapshot format parameter");
6359         } elsif (!exists($known_snapshot_formats{$format})) {
6360                 die_error(400, "Unknown snapshot format");
6361         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6362                 die_error(403, "Snapshot format not allowed");
6363         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6364                 die_error(403, "Unsupported snapshot format");
6365         }
6366
6367         my $type = git_get_type("$hash^{}");
6368         if (!$type) {
6369                 die_error(404, 'Object does not exist');
6370         }  elsif ($type eq 'blob') {
6371                 die_error(400, 'Object is not a tree-ish');
6372         }
6373
6374         my ($name, $prefix) = snapshot_name($project, $hash);
6375         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6376         my $cmd = quote_command(
6377                 git_cmd(), 'archive',
6378                 "--format=$known_snapshot_formats{$format}{'format'}",
6379                 "--prefix=$prefix/", $hash);
6380         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6381                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6382         }
6383
6384         $filename =~ s/(["\\])/\\$1/g;
6385         print $cgi->header(
6386                 -type => $known_snapshot_formats{$format}{'type'},
6387                 -content_disposition => 'inline; filename="' . $filename . '"',
6388                 -status => '200 OK');
6389
6390         open my $fd, "-|", $cmd
6391                 or die_error(500, "Execute git-archive failed");
6392         binmode STDOUT, ':raw';
6393         print <$fd>;
6394         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6395         close $fd;
6396 }
6397
6398 sub git_log_generic {
6399         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6400
6401         my $head = git_get_head_hash($project);
6402         if (!defined $base) {
6403                 $base = $head;
6404         }
6405         if (!defined $page) {
6406                 $page = 0;
6407         }
6408         my $refs = git_get_references();
6409
6410         my $commit_hash = $base;
6411         if (defined $parent) {
6412                 $commit_hash = "$parent..$base";
6413         }
6414         my @commitlist =
6415                 parse_commits($commit_hash, 101, (100 * $page),
6416                               defined $file_name ? ($file_name, "--full-history") : ());
6417
6418         my $ftype;
6419         if (!defined $file_hash && defined $file_name) {
6420                 # some commits could have deleted file in question,
6421                 # and not have it in tree, but one of them has to have it
6422                 for (my $i = 0; $i < @commitlist; $i++) {
6423                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6424                         last if defined $file_hash;
6425                 }
6426         }
6427         if (defined $file_hash) {
6428                 $ftype = git_get_type($file_hash);
6429         }
6430         if (defined $file_name && !defined $ftype) {
6431                 die_error(500, "Unknown type of object");
6432         }
6433         my %co;
6434         if (defined $file_name) {
6435                 %co = parse_commit($base)
6436                         or die_error(404, "Unknown commit object");
6437         }
6438
6439
6440         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6441         my $next_link = '';
6442         if ($#commitlist >= 100) {
6443                 $next_link =
6444                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6445                                  -accesskey => "n", -title => "Alt-n"}, "next");
6446         }
6447         my $patch_max = gitweb_get_feature('patches');
6448         if ($patch_max && !defined $file_name) {
6449                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6450                         $paging_nav .= " &sdot; " .
6451                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6452                                         "patches");
6453                 }
6454         }
6455
6456         git_header_html();
6457         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6458         if (defined $file_name) {
6459                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6460         } else {
6461                 git_print_header_div('summary', $project)
6462         }
6463         git_print_page_path($file_name, $ftype, $hash_base)
6464                 if (defined $file_name);
6465
6466         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6467                      $file_name, $file_hash, $ftype);
6468
6469         git_footer_html();
6470 }
6471
6472 sub git_log {
6473         git_log_generic('log', \&git_log_body,
6474                         $hash, $hash_parent);
6475 }
6476
6477 sub git_commit {
6478         $hash ||= $hash_base || "HEAD";
6479         my %co = parse_commit($hash)
6480             or die_error(404, "Unknown commit object");
6481
6482         my $parent  = $co{'parent'};
6483         my $parents = $co{'parents'}; # listref
6484
6485         # we need to prepare $formats_nav before any parameter munging
6486         my $formats_nav;
6487         if (!defined $parent) {
6488                 # --root commitdiff
6489                 $formats_nav .= '(initial)';
6490         } elsif (@$parents == 1) {
6491                 # single parent commit
6492                 $formats_nav .=
6493                         '(parent: ' .
6494                         $cgi->a({-href => href(action=>"commit",
6495                                                hash=>$parent)},
6496                                 esc_html(substr($parent, 0, 7))) .
6497                         ')';
6498         } else {
6499                 # merge commit
6500                 $formats_nav .=
6501                         '(merge: ' .
6502                         join(' ', map {
6503                                 $cgi->a({-href => href(action=>"commit",
6504                                                        hash=>$_)},
6505                                         esc_html(substr($_, 0, 7)));
6506                         } @$parents ) .
6507                         ')';
6508         }
6509         if (gitweb_check_feature('patches') && @$parents <= 1) {
6510                 $formats_nav .= " | " .
6511                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6512                                 "patch");
6513         }
6514
6515         if (!defined $parent) {
6516                 $parent = "--root";
6517         }
6518         my @difftree;
6519         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6520                 @diff_opts,
6521                 (@$parents <= 1 ? $parent : '-c'),
6522                 $hash, "--"
6523                 or die_error(500, "Open git-diff-tree failed");
6524         @difftree = map { chomp; $_ } <$fd>;
6525         close $fd or die_error(404, "Reading git-diff-tree failed");
6526
6527         # non-textual hash id's can be cached
6528         my $expires;
6529         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6530                 $expires = "+1d";
6531         }
6532         my $refs = git_get_references();
6533         my $ref = format_ref_marker($refs, $co{'id'});
6534
6535         git_header_html(undef, $expires);
6536         git_print_page_nav('commit', '',
6537                            $hash, $co{'tree'}, $hash,
6538                            $formats_nav);
6539
6540         if (defined $co{'parent'}) {
6541                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6542         } else {
6543                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6544         }
6545         print "<div class=\"title_text\">\n" .
6546               "<table class=\"object_header\">\n";
6547         git_print_authorship_rows(\%co);
6548         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6549         print "<tr>" .
6550               "<td>tree</td>" .
6551               "<td class=\"sha1\">" .
6552               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6553                        class => "list"}, $co{'tree'}) .
6554               "</td>" .
6555               "<td class=\"link\">" .
6556               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6557                       "tree");
6558         my $snapshot_links = format_snapshot_links($hash);
6559         if (defined $snapshot_links) {
6560                 print " | " . $snapshot_links;
6561         }
6562         print "</td>" .
6563               "</tr>\n";
6564
6565         foreach my $par (@$parents) {
6566                 print "<tr>" .
6567                       "<td>parent</td>" .
6568                       "<td class=\"sha1\">" .
6569                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6570                                class => "list"}, $par) .
6571                       "</td>" .
6572                       "<td class=\"link\">" .
6573                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6574                       " | " .
6575                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6576                       "</td>" .
6577                       "</tr>\n";
6578         }
6579         print "</table>".
6580               "</div>\n";
6581
6582         print "<div class=\"page_body\">\n";
6583         git_print_log($co{'comment'});
6584         print "</div>\n";
6585
6586         git_difftree_body(\@difftree, $hash, @$parents);
6587
6588         git_footer_html();
6589 }
6590
6591 sub git_object {
6592         # object is defined by:
6593         # - hash or hash_base alone
6594         # - hash_base and file_name
6595         my $type;
6596
6597         # - hash or hash_base alone
6598         if ($hash || ($hash_base && !defined $file_name)) {
6599                 my $object_id = $hash || $hash_base;
6600
6601                 open my $fd, "-|", quote_command(
6602                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6603                         or die_error(404, "Object does not exist");
6604                 $type = <$fd>;
6605                 chomp $type;
6606                 close $fd
6607                         or die_error(404, "Object does not exist");
6608
6609         # - hash_base and file_name
6610         } elsif ($hash_base && defined $file_name) {
6611                 $file_name =~ s,/+$,,;
6612
6613                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6614                         or die_error(404, "Base object does not exist");
6615
6616                 # here errors should not hapen
6617                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6618                         or die_error(500, "Open git-ls-tree failed");
6619                 my $line = <$fd>;
6620                 close $fd;
6621
6622                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6623                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6624                         die_error(404, "File or directory for given base does not exist");
6625                 }
6626                 $type = $2;
6627                 $hash = $3;
6628         } else {
6629                 die_error(400, "Not enough information to find object");
6630         }
6631
6632         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6633                                           hash=>$hash, hash_base=>$hash_base,
6634                                           file_name=>$file_name),
6635                              -status => '302 Found');
6636 }
6637
6638 sub git_blobdiff {
6639         my $format = shift || 'html';
6640
6641         my $fd;
6642         my @difftree;
6643         my %diffinfo;
6644         my $expires;
6645
6646         # preparing $fd and %diffinfo for git_patchset_body
6647         # new style URI
6648         if (defined $hash_base && defined $hash_parent_base) {
6649                 if (defined $file_name) {
6650                         # read raw output
6651                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6652                                 $hash_parent_base, $hash_base,
6653                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6654                                 or die_error(500, "Open git-diff-tree failed");
6655                         @difftree = map { chomp; $_ } <$fd>;
6656                         close $fd
6657                                 or die_error(404, "Reading git-diff-tree failed");
6658                         @difftree
6659                                 or die_error(404, "Blob diff not found");
6660
6661                 } elsif (defined $hash &&
6662                          $hash =~ /[0-9a-fA-F]{40}/) {
6663                         # try to find filename from $hash
6664
6665                         # read filtered raw output
6666                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6667                                 $hash_parent_base, $hash_base, "--"
6668                                 or die_error(500, "Open git-diff-tree failed");
6669                         @difftree =
6670                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6671                                 # $hash == to_id
6672                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6673                                 map { chomp; $_ } <$fd>;
6674                         close $fd
6675                                 or die_error(404, "Reading git-diff-tree failed");
6676                         @difftree
6677                                 or die_error(404, "Blob diff not found");
6678
6679                 } else {
6680                         die_error(400, "Missing one of the blob diff parameters");
6681                 }
6682
6683                 if (@difftree > 1) {
6684                         die_error(400, "Ambiguous blob diff specification");
6685                 }
6686
6687                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6688                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6689                 $file_name   ||= $diffinfo{'to_file'};
6690
6691                 $hash_parent ||= $diffinfo{'from_id'};
6692                 $hash        ||= $diffinfo{'to_id'};
6693
6694                 # non-textual hash id's can be cached
6695                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6696                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6697                         $expires = '+1d';
6698                 }
6699
6700                 # open patch output
6701                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6702                         '-p', ($format eq 'html' ? "--full-index" : ()),
6703                         $hash_parent_base, $hash_base,
6704                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6705                         or die_error(500, "Open git-diff-tree failed");
6706         }
6707
6708         # old/legacy style URI -- not generated anymore since 1.4.3.
6709         if (!%diffinfo) {
6710                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6711         }
6712
6713         # header
6714         if ($format eq 'html') {
6715                 my $formats_nav =
6716                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6717                                 "raw");
6718                 git_header_html(undef, $expires);
6719                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6720                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6721                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6722                 } else {
6723                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6724                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6725                 }
6726                 if (defined $file_name) {
6727                         git_print_page_path($file_name, "blob", $hash_base);
6728                 } else {
6729                         print "<div class=\"page_path\"></div>\n";
6730                 }
6731
6732         } elsif ($format eq 'plain') {
6733                 print $cgi->header(
6734                         -type => 'text/plain',
6735                         -charset => 'utf-8',
6736                         -expires => $expires,
6737                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6738
6739                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6740
6741         } else {
6742                 die_error(400, "Unknown blobdiff format");
6743         }
6744
6745         # patch
6746         if ($format eq 'html') {
6747                 print "<div class=\"page_body\">\n";
6748
6749                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6750                 close $fd;
6751
6752                 print "</div>\n"; # class="page_body"
6753                 git_footer_html();
6754
6755         } else {
6756                 while (my $line = <$fd>) {
6757                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6758                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6759
6760                         print $line;
6761
6762                         last if $line =~ m!^\+\+\+!;
6763                 }
6764                 local $/ = undef;
6765                 print <$fd>;
6766                 close $fd;
6767         }
6768 }
6769
6770 sub git_blobdiff_plain {
6771         git_blobdiff('plain');
6772 }
6773
6774 sub git_commitdiff {
6775         my %params = @_;
6776         my $format = $params{-format} || 'html';
6777
6778         my ($patch_max) = gitweb_get_feature('patches');
6779         if ($format eq 'patch') {
6780                 die_error(403, "Patch view not allowed") unless $patch_max;
6781         }
6782
6783         $hash ||= $hash_base || "HEAD";
6784         my %co = parse_commit($hash)
6785             or die_error(404, "Unknown commit object");
6786
6787         # choose format for commitdiff for merge
6788         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6789                 $hash_parent = '--cc';
6790         }
6791         # we need to prepare $formats_nav before almost any parameter munging
6792         my $formats_nav;
6793         if ($format eq 'html') {
6794                 $formats_nav =
6795                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6796                                 "raw");
6797                 if ($patch_max && @{$co{'parents'}} <= 1) {
6798                         $formats_nav .= " | " .
6799                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6800                                         "patch");
6801                 }
6802
6803                 if (defined $hash_parent &&
6804                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6805                         # commitdiff with two commits given
6806                         my $hash_parent_short = $hash_parent;
6807                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6808                                 $hash_parent_short = substr($hash_parent, 0, 7);
6809                         }
6810                         $formats_nav .=
6811                                 ' (from';
6812                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6813                                 if ($co{'parents'}[$i] eq $hash_parent) {
6814                                         $formats_nav .= ' parent ' . ($i+1);
6815                                         last;
6816                                 }
6817                         }
6818                         $formats_nav .= ': ' .
6819                                 $cgi->a({-href => href(action=>"commitdiff",
6820                                                        hash=>$hash_parent)},
6821                                         esc_html($hash_parent_short)) .
6822                                 ')';
6823                 } elsif (!$co{'parent'}) {
6824                         # --root commitdiff
6825                         $formats_nav .= ' (initial)';
6826                 } elsif (scalar @{$co{'parents'}} == 1) {
6827                         # single parent commit
6828                         $formats_nav .=
6829                                 ' (parent: ' .
6830                                 $cgi->a({-href => href(action=>"commitdiff",
6831                                                        hash=>$co{'parent'})},
6832                                         esc_html(substr($co{'parent'}, 0, 7))) .
6833                                 ')';
6834                 } else {
6835                         # merge commit
6836                         if ($hash_parent eq '--cc') {
6837                                 $formats_nav .= ' | ' .
6838                                         $cgi->a({-href => href(action=>"commitdiff",
6839                                                                hash=>$hash, hash_parent=>'-c')},
6840                                                 'combined');
6841                         } else { # $hash_parent eq '-c'
6842                                 $formats_nav .= ' | ' .
6843                                         $cgi->a({-href => href(action=>"commitdiff",
6844                                                                hash=>$hash, hash_parent=>'--cc')},
6845                                                 'compact');
6846                         }
6847                         $formats_nav .=
6848                                 ' (merge: ' .
6849                                 join(' ', map {
6850                                         $cgi->a({-href => href(action=>"commitdiff",
6851                                                                hash=>$_)},
6852                                                 esc_html(substr($_, 0, 7)));
6853                                 } @{$co{'parents'}} ) .
6854                                 ')';
6855                 }
6856         }
6857
6858         my $hash_parent_param = $hash_parent;
6859         if (!defined $hash_parent_param) {
6860                 # --cc for multiple parents, --root for parentless
6861                 $hash_parent_param =
6862                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6863         }
6864
6865         # read commitdiff
6866         my $fd;
6867         my @difftree;
6868         if ($format eq 'html') {
6869                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6870                         "--no-commit-id", "--patch-with-raw", "--full-index",
6871                         $hash_parent_param, $hash, "--"
6872                         or die_error(500, "Open git-diff-tree failed");
6873
6874                 while (my $line = <$fd>) {
6875                         chomp $line;
6876                         # empty line ends raw part of diff-tree output
6877                         last unless $line;
6878                         push @difftree, scalar parse_difftree_raw_line($line);
6879                 }
6880
6881         } elsif ($format eq 'plain') {
6882                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6883                         '-p', $hash_parent_param, $hash, "--"
6884                         or die_error(500, "Open git-diff-tree failed");
6885         } elsif ($format eq 'patch') {
6886                 # For commit ranges, we limit the output to the number of
6887                 # patches specified in the 'patches' feature.
6888                 # For single commits, we limit the output to a single patch,
6889                 # diverging from the git-format-patch default.
6890                 my @commit_spec = ();
6891                 if ($hash_parent) {
6892                         if ($patch_max > 0) {
6893                                 push @commit_spec, "-$patch_max";
6894                         }
6895                         push @commit_spec, '-n', "$hash_parent..$hash";
6896                 } else {
6897                         if ($params{-single}) {
6898                                 push @commit_spec, '-1';
6899                         } else {
6900                                 if ($patch_max > 0) {
6901                                         push @commit_spec, "-$patch_max";
6902                                 }
6903                                 push @commit_spec, "-n";
6904                         }
6905                         push @commit_spec, '--root', $hash;
6906                 }
6907                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6908                         '--encoding=utf8', '--stdout', @commit_spec
6909                         or die_error(500, "Open git-format-patch failed");
6910         } else {
6911                 die_error(400, "Unknown commitdiff format");
6912         }
6913
6914         # non-textual hash id's can be cached
6915         my $expires;
6916         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6917                 $expires = "+1d";
6918         }
6919
6920         # write commit message
6921         if ($format eq 'html') {
6922                 my $refs = git_get_references();
6923                 my $ref = format_ref_marker($refs, $co{'id'});
6924
6925                 git_header_html(undef, $expires);
6926                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6927                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6928                 print "<div class=\"title_text\">\n" .
6929                       "<table class=\"object_header\">\n";
6930                 git_print_authorship_rows(\%co);
6931                 print "</table>".
6932                       "</div>\n";
6933                 print "<div class=\"page_body\">\n";
6934                 if (@{$co{'comment'}} > 1) {
6935                         print "<div class=\"log\">\n";
6936                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6937                         print "</div>\n"; # class="log"
6938                 }
6939
6940         } elsif ($format eq 'plain') {
6941                 my $refs = git_get_references("tags");
6942                 my $tagname = git_get_rev_name_tags($hash);
6943                 my $filename = basename($project) . "-$hash.patch";
6944
6945                 print $cgi->header(
6946                         -type => 'text/plain',
6947                         -charset => 'utf-8',
6948                         -expires => $expires,
6949                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6950                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6951                 print "From: " . to_utf8($co{'author'}) . "\n";
6952                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6953                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6954
6955                 print "X-Git-Tag: $tagname\n" if $tagname;
6956                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6957
6958                 foreach my $line (@{$co{'comment'}}) {
6959                         print to_utf8($line) . "\n";
6960                 }
6961                 print "---\n\n";
6962         } elsif ($format eq 'patch') {
6963                 my $filename = basename($project) . "-$hash.patch";
6964
6965                 print $cgi->header(
6966                         -type => 'text/plain',
6967                         -charset => 'utf-8',
6968                         -expires => $expires,
6969                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6970         }
6971
6972         # write patch
6973         if ($format eq 'html') {
6974                 my $use_parents = !defined $hash_parent ||
6975                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6976                 git_difftree_body(\@difftree, $hash,
6977                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6978                 print "<br/>\n";
6979
6980                 git_patchset_body($fd, \@difftree, $hash,
6981                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6982                 close $fd;
6983                 print "</div>\n"; # class="page_body"
6984                 git_footer_html();
6985
6986         } elsif ($format eq 'plain') {
6987                 local $/ = undef;
6988                 print <$fd>;
6989                 close $fd
6990                         or print "Reading git-diff-tree failed\n";
6991         } elsif ($format eq 'patch') {
6992                 local $/ = undef;
6993                 print <$fd>;
6994                 close $fd
6995                         or print "Reading git-format-patch failed\n";
6996         }
6997 }
6998
6999 sub git_commitdiff_plain {
7000         git_commitdiff(-format => 'plain');
7001 }
7002
7003 # format-patch-style patches
7004 sub git_patch {
7005         git_commitdiff(-format => 'patch', -single => 1);
7006 }
7007
7008 sub git_patches {
7009         git_commitdiff(-format => 'patch');
7010 }
7011
7012 sub git_history {
7013         git_log_generic('history', \&git_history_body,
7014                         $hash_base, $hash_parent_base,
7015                         $file_name, $hash);
7016 }
7017
7018 sub git_search {
7019         gitweb_check_feature('search') or die_error(403, "Search is disabled");
7020         if (!defined $searchtext) {
7021                 die_error(400, "Text field is empty");
7022         }
7023         if (!defined $hash) {
7024                 $hash = git_get_head_hash($project);
7025         }
7026         my %co = parse_commit($hash);
7027         if (!%co) {
7028                 die_error(404, "Unknown commit object");
7029         }
7030         if (!defined $page) {
7031                 $page = 0;
7032         }
7033
7034         $searchtype ||= 'commit';
7035         if ($searchtype eq 'pickaxe') {
7036                 # pickaxe may take all resources of your box and run for several minutes
7037                 # with every query - so decide by yourself how public you make this feature
7038                 gitweb_check_feature('pickaxe')
7039                     or die_error(403, "Pickaxe is disabled");
7040         }
7041         if ($searchtype eq 'grep') {
7042                 gitweb_check_feature('grep')[0]
7043                     or die_error(403, "Grep is disabled");
7044         }
7045
7046         git_header_html();
7047
7048         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
7049                 my $greptype;
7050                 if ($searchtype eq 'commit') {
7051                         $greptype = "--grep=";
7052                 } elsif ($searchtype eq 'author') {
7053                         $greptype = "--author=";
7054                 } elsif ($searchtype eq 'committer') {
7055                         $greptype = "--committer=";
7056                 }
7057                 $greptype .= $searchtext;
7058                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7059                                                $greptype, '--regexp-ignore-case',
7060                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7061
7062                 my $paging_nav = '';
7063                 if ($page > 0) {
7064                         $paging_nav .=
7065                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
7066                                                        searchtext=>$searchtext,
7067                                                        searchtype=>$searchtype)},
7068                                         "first");
7069                         $paging_nav .= " &sdot; " .
7070                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
7071                                          -accesskey => "p", -title => "Alt-p"}, "prev");
7072                 } else {
7073                         $paging_nav .= "first";
7074                         $paging_nav .= " &sdot; prev";
7075                 }
7076                 my $next_link = '';
7077                 if ($#commitlist >= 100) {
7078                         $next_link =
7079                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7080                                          -accesskey => "n", -title => "Alt-n"}, "next");
7081                         $paging_nav .= " &sdot; $next_link";
7082                 } else {
7083                         $paging_nav .= " &sdot; next";
7084                 }
7085
7086                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7087                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7088                 if ($page == 0 && !@commitlist) {
7089                         print "<p>No match.</p>\n";
7090                 } else {
7091                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7092                 }
7093         }
7094
7095         if ($searchtype eq 'pickaxe') {
7096                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7097                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7098
7099                 print "<table class=\"pickaxe search\">\n";
7100                 my $alternate = 1;
7101                 local $/ = "\n";
7102                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7103                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7104                         ($search_use_regexp ? '--pickaxe-regex' : ());
7105                 undef %co;
7106                 my @files;
7107                 while (my $line = <$fd>) {
7108                         chomp $line;
7109                         next unless $line;
7110
7111                         my %set = parse_difftree_raw_line($line);
7112                         if (defined $set{'commit'}) {
7113                                 # finish previous commit
7114                                 if (%co) {
7115                                         print "</td>\n" .
7116                                               "<td class=\"link\">" .
7117                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7118                                               " | " .
7119                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7120                                         print "</td>\n" .
7121                                               "</tr>\n";
7122                                 }
7123
7124                                 if ($alternate) {
7125                                         print "<tr class=\"dark\">\n";
7126                                 } else {
7127                                         print "<tr class=\"light\">\n";
7128                                 }
7129                                 $alternate ^= 1;
7130                                 %co = parse_commit($set{'commit'});
7131                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7132                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7133                                       "<td><i>$author</i></td>\n" .
7134                                       "<td>" .
7135                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7136                                               -class => "list subject"},
7137                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7138                         } elsif (defined $set{'to_id'}) {
7139                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7140
7141                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7142                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7143                                               -class => "list"},
7144                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7145                                       "<br/>\n";
7146                         }
7147                 }
7148                 close $fd;
7149
7150                 # finish last commit (warning: repetition!)
7151                 if (%co) {
7152                         print "</td>\n" .
7153                               "<td class=\"link\">" .
7154                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7155                               " | " .
7156                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7157                         print "</td>\n" .
7158                               "</tr>\n";
7159                 }
7160
7161                 print "</table>\n";
7162         }
7163
7164         if ($searchtype eq 'grep') {
7165                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7166                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7167
7168                 print "<table class=\"grep_search\">\n";
7169                 my $alternate = 1;
7170                 my $matches = 0;
7171                 local $/ = "\n";
7172                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7173                         $search_use_regexp ? ('-E', '-i') : '-F',
7174                         $searchtext, $co{'tree'};
7175                 my $lastfile = '';
7176                 while (my $line = <$fd>) {
7177                         chomp $line;
7178                         my ($file, $lno, $ltext, $binary);
7179                         last if ($matches++ > 1000);
7180                         if ($line =~ /^Binary file (.+) matches$/) {
7181                                 $file = $1;
7182                                 $binary = 1;
7183                         } else {
7184                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7185                         }
7186                         if ($file ne $lastfile) {
7187                                 $lastfile and print "</td></tr>\n";
7188                                 if ($alternate++) {
7189                                         print "<tr class=\"dark\">\n";
7190                                 } else {
7191                                         print "<tr class=\"light\">\n";
7192                                 }
7193                                 print "<td class=\"list\">".
7194                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7195                                                                file_name=>"$file"),
7196                                                 -class => "list"}, esc_path($file));
7197                                 print "</td><td>\n";
7198                                 $lastfile = $file;
7199                         }
7200                         if ($binary) {
7201                                 print "<div class=\"binary\">Binary file</div>\n";
7202                         } else {
7203                                 $ltext = untabify($ltext);
7204                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7205                                         $ltext = esc_html($1, -nbsp=>1);
7206                                         $ltext .= '<span class="match">';
7207                                         $ltext .= esc_html($2, -nbsp=>1);
7208                                         $ltext .= '</span>';
7209                                         $ltext .= esc_html($3, -nbsp=>1);
7210                                 } else {
7211                                         $ltext = esc_html($ltext, -nbsp=>1);
7212                                 }
7213                                 print "<div class=\"pre\">" .
7214                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7215                                                                file_name=>"$file").'#l'.$lno,
7216                                                 -class => "linenr"}, sprintf('%4i', $lno))
7217                                         . ' ' .  $ltext . "</div>\n";
7218                         }
7219                 }
7220                 if ($lastfile) {
7221                         print "</td></tr>\n";
7222                         if ($matches > 1000) {
7223                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7224                         }
7225                 } else {
7226                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7227                 }
7228                 close $fd;
7229
7230                 print "</table>\n";
7231         }
7232         git_footer_html();
7233 }
7234
7235 sub git_search_help {
7236         git_header_html();
7237         git_print_page_nav('','', $hash,$hash,$hash);
7238         print <<EOT;
7239 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7240 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7241 the pattern entered is recognized as the POSIX extended
7242 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7243 insensitive).</p>
7244 <dl>
7245 <dt><b>commit</b></dt>
7246 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7247 EOT
7248         my $have_grep = gitweb_check_feature('grep');
7249         if ($have_grep) {
7250                 print <<EOT;
7251 <dt><b>grep</b></dt>
7252 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7253     a different one) are searched for the given pattern. On large trees, this search can take
7254 a while and put some strain on the server, so please use it with some consideration. Note that
7255 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7256 case-sensitive.</dd>
7257 EOT
7258         }
7259         print <<EOT;
7260 <dt><b>author</b></dt>
7261 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7262 <dt><b>committer</b></dt>
7263 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7264 EOT
7265         my $have_pickaxe = gitweb_check_feature('pickaxe');
7266         if ($have_pickaxe) {
7267                 print <<EOT;
7268 <dt><b>pickaxe</b></dt>
7269 <dd>All commits that caused the string to appear or disappear from any file (changes that
7270 added, removed or "modified" the string) will be listed. This search can take a while and
7271 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7272 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7273 EOT
7274         }
7275         print "</dl>\n";
7276         git_footer_html();
7277 }
7278
7279 sub git_shortlog {
7280         git_log_generic('shortlog', \&git_shortlog_body,
7281                         $hash, $hash_parent);
7282 }
7283
7284 ## ......................................................................
7285 ## feeds (RSS, Atom; OPML)
7286
7287 sub git_feed {
7288         my $format = shift || 'atom';
7289         my $have_blame = gitweb_check_feature('blame');
7290
7291         # Atom: http://www.atomenabled.org/developers/syndication/
7292         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7293         if ($format ne 'rss' && $format ne 'atom') {
7294                 die_error(400, "Unknown web feed format");
7295         }
7296
7297         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7298         my $head = $hash || 'HEAD';
7299         my @commitlist = parse_commits($head, 150, 0, $file_name);
7300
7301         my %latest_commit;
7302         my %latest_date;
7303         my $content_type = "application/$format+xml";
7304         if (defined $cgi->http('HTTP_ACCEPT') &&
7305                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7306                 # browser (feed reader) prefers text/xml
7307                 $content_type = 'text/xml';
7308         }
7309         if (defined($commitlist[0])) {
7310                 %latest_commit = %{$commitlist[0]};
7311                 my $latest_epoch = $latest_commit{'committer_epoch'};
7312                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7313                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7314                 if (defined $if_modified) {
7315                         my $since;
7316                         if (eval { require HTTP::Date; 1; }) {
7317                                 $since = HTTP::Date::str2time($if_modified);
7318                         } elsif (eval { require Time::ParseDate; 1; }) {
7319                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7320                         }
7321                         if (defined $since && $latest_epoch <= $since) {
7322                                 print $cgi->header(
7323                                         -type => $content_type,
7324                                         -charset => 'utf-8',
7325                                         -last_modified => $latest_date{'rfc2822'},
7326                                         -status => '304 Not Modified');
7327                                 return;
7328                         }
7329                 }
7330                 print $cgi->header(
7331                         -type => $content_type,
7332                         -charset => 'utf-8',
7333                         -last_modified => $latest_date{'rfc2822'});
7334         } else {
7335                 print $cgi->header(
7336                         -type => $content_type,
7337                         -charset => 'utf-8');
7338         }
7339
7340         # Optimization: skip generating the body if client asks only
7341         # for Last-Modified date.
7342         return if ($cgi->request_method() eq 'HEAD');
7343
7344         # header variables
7345         my $title = "$site_name - $project/$action";
7346         my $feed_type = 'log';
7347         if (defined $hash) {
7348                 $title .= " - '$hash'";
7349                 $feed_type = 'branch log';
7350                 if (defined $file_name) {
7351                         $title .= " :: $file_name";
7352                         $feed_type = 'history';
7353                 }
7354         } elsif (defined $file_name) {
7355                 $title .= " - $file_name";
7356                 $feed_type = 'history';
7357         }
7358         $title .= " $feed_type";
7359         my $descr = git_get_project_description($project);
7360         if (defined $descr) {
7361                 $descr = esc_html($descr);
7362         } else {
7363                 $descr = "$project " .
7364                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7365                          " feed";
7366         }
7367         my $owner = git_get_project_owner($project);
7368         $owner = esc_html($owner);
7369
7370         #header
7371         my $alt_url;
7372         if (defined $file_name) {
7373                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7374         } elsif (defined $hash) {
7375                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7376         } else {
7377                 $alt_url = href(-full=>1, action=>"summary");
7378         }
7379         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7380         if ($format eq 'rss') {
7381                 print <<XML;
7382 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7383 <channel>
7384 XML
7385                 print "<title>$title</title>\n" .
7386                       "<link>$alt_url</link>\n" .
7387                       "<description>$descr</description>\n" .
7388                       "<language>en</language>\n" .
7389                       # project owner is responsible for 'editorial' content
7390                       "<managingEditor>$owner</managingEditor>\n";
7391                 if (defined $logo || defined $favicon) {
7392                         # prefer the logo to the favicon, since RSS
7393                         # doesn't allow both
7394                         my $img = esc_url($logo || $favicon);
7395                         print "<image>\n" .
7396                               "<url>$img</url>\n" .
7397                               "<title>$title</title>\n" .
7398                               "<link>$alt_url</link>\n" .
7399                               "</image>\n";
7400                 }
7401                 if (%latest_date) {
7402                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7403                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7404                 }
7405                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7406         } elsif ($format eq 'atom') {
7407                 print <<XML;
7408 <feed xmlns="http://www.w3.org/2005/Atom">
7409 XML
7410                 print "<title>$title</title>\n" .
7411                       "<subtitle>$descr</subtitle>\n" .
7412                       '<link rel="alternate" type="text/html" href="' .
7413                       $alt_url . '" />' . "\n" .
7414                       '<link rel="self" type="' . $content_type . '" href="' .
7415                       $cgi->self_url() . '" />' . "\n" .
7416                       "<id>" . href(-full=>1) . "</id>\n" .
7417                       # use project owner for feed author
7418                       "<author><name>$owner</name></author>\n";
7419                 if (defined $favicon) {
7420                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7421                 }
7422                 if (defined $logo) {
7423                         # not twice as wide as tall: 72 x 27 pixels
7424                         print "<logo>" . esc_url($logo) . "</logo>\n";
7425                 }
7426                 if (! %latest_date) {
7427                         # dummy date to keep the feed valid until commits trickle in:
7428                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7429                 } else {
7430                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7431                 }
7432                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7433         }
7434
7435         # contents
7436         for (my $i = 0; $i <= $#commitlist; $i++) {
7437                 my %co = %{$commitlist[$i]};
7438                 my $commit = $co{'id'};
7439                 # we read 150, we always show 30 and the ones more recent than 48 hours
7440                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7441                         last;
7442                 }
7443                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7444
7445                 # get list of changed files
7446                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7447                         $co{'parent'} || "--root",
7448                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7449                         or next;
7450                 my @difftree = map { chomp; $_ } <$fd>;
7451                 close $fd
7452                         or next;
7453
7454                 # print element (entry, item)
7455                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7456                 if ($format eq 'rss') {
7457                         print "<item>\n" .
7458                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7459                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7460                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7461                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7462                               "<link>$co_url</link>\n" .
7463                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7464                               "<content:encoded>" .
7465                               "<![CDATA[\n";
7466                 } elsif ($format eq 'atom') {
7467                         print "<entry>\n" .
7468                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7469                               "<updated>$cd{'iso-8601'}</updated>\n" .
7470                               "<author>\n" .
7471                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7472                         if ($co{'author_email'}) {
7473                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7474                         }
7475                         print "</author>\n" .
7476                               # use committer for contributor
7477                               "<contributor>\n" .
7478                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7479                         if ($co{'committer_email'}) {
7480                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7481                         }
7482                         print "</contributor>\n" .
7483                               "<published>$cd{'iso-8601'}</published>\n" .
7484                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7485                               "<id>$co_url</id>\n" .
7486                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7487                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7488                 }
7489                 my $comment = $co{'comment'};
7490                 print "<pre>\n";
7491                 foreach my $line (@$comment) {
7492                         $line = esc_html($line);
7493                         print "$line\n";
7494                 }
7495                 print "</pre><ul>\n";
7496                 foreach my $difftree_line (@difftree) {
7497                         my %difftree = parse_difftree_raw_line($difftree_line);
7498                         next if !$difftree{'from_id'};
7499
7500                         my $file = $difftree{'file'} || $difftree{'to_file'};
7501
7502                         print "<li>" .
7503                               "[" .
7504                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7505                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7506                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7507                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7508                                       -title => "diff"}, 'D');
7509                         if ($have_blame) {
7510                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7511                                                              file_name=>$file, hash_base=>$commit),
7512                                               -title => "blame"}, 'B');
7513                         }
7514                         # if this is not a feed of a file history
7515                         if (!defined $file_name || $file_name ne $file) {
7516                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7517                                                              file_name=>$file, hash=>$commit),
7518                                               -title => "history"}, 'H');
7519                         }
7520                         $file = esc_path($file);
7521                         print "] ".
7522                               "$file</li>\n";
7523                 }
7524                 if ($format eq 'rss') {
7525                         print "</ul>]]>\n" .
7526                               "</content:encoded>\n" .
7527                               "</item>\n";
7528                 } elsif ($format eq 'atom') {
7529                         print "</ul>\n</div>\n" .
7530                               "</content>\n" .
7531                               "</entry>\n";
7532                 }
7533         }
7534
7535         # end of feed
7536         if ($format eq 'rss') {
7537                 print "</channel>\n</rss>\n";
7538         } elsif ($format eq 'atom') {
7539                 print "</feed>\n";
7540         }
7541 }
7542
7543 sub git_rss {
7544         git_feed('rss');
7545 }
7546
7547 sub git_atom {
7548         git_feed('atom');
7549 }
7550
7551 sub git_opml {
7552         my @list = git_get_projects_list();
7553         if (!@list) {
7554                 die_error(404, "No projects found");
7555         }
7556
7557         print $cgi->header(
7558                 -type => 'text/xml',
7559                 -charset => 'utf-8',
7560                 -content_disposition => 'inline; filename="opml.xml"');
7561
7562         print <<XML;
7563 <?xml version="1.0" encoding="utf-8"?>
7564 <opml version="1.0">
7565 <head>
7566   <title>$site_name OPML Export</title>
7567 </head>
7568 <body>
7569 <outline text="git RSS feeds">
7570 XML
7571
7572         foreach my $pr (@list) {
7573                 my %proj = %$pr;
7574                 my $head = git_get_head_hash($proj{'path'});
7575                 if (!defined $head) {
7576                         next;
7577                 }
7578                 $git_dir = "$projectroot/$proj{'path'}";
7579                 my %co = parse_commit($head);
7580                 if (!%co) {
7581                         next;
7582                 }
7583
7584                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7585                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7586                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7587                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7588         }
7589         print <<XML;
7590 </outline>
7591 </body>
7592 </opml>
7593 XML
7594 }