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         } elsif (gitweb_check_feature('javascript-actions')) {
3890                 print qq!<script type="text/javascript">\n!.
3891                       qq!window.onload = fixLinks;\n!.
3892                       qq!</script>\n!;
3893         }
3894
3895         print "</body>\n" .
3896               "</html>";
3897 }
3898
3899 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3900 # Example: die_error(404, 'Hash not found')
3901 # By convention, use the following status codes (as defined in RFC 2616):
3902 # 400: Invalid or missing CGI parameters, or
3903 #      requested object exists but has wrong type.
3904 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3905 #      this server or project.
3906 # 404: Requested object/revision/project doesn't exist.
3907 # 500: The server isn't configured properly, or
3908 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3909 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3910 # 503: The server is currently unavailable (because it is overloaded,
3911 #      or down for maintenance).  Generally, this is a temporary state.
3912 sub die_error {
3913         my $status = shift || 500;
3914         my $error = esc_html(shift) || "Internal Server Error";
3915         my $extra = shift;
3916         my %opts = @_;
3917
3918         my %http_responses = (
3919                 400 => '400 Bad Request',
3920                 403 => '403 Forbidden',
3921                 404 => '404 Not Found',
3922                 500 => '500 Internal Server Error',
3923                 503 => '503 Service Unavailable',
3924         );
3925         git_header_html($http_responses{$status}, undef, %opts);
3926         print <<EOF;
3927 <div class="page_body">
3928 <br /><br />
3929 $status - $error
3930 <br />
3931 EOF
3932         if (defined $extra) {
3933                 print "<hr />\n" .
3934                       "$extra\n";
3935         }
3936         print "</div>\n";
3937
3938         git_footer_html();
3939         goto DONE_GITWEB
3940                 unless ($opts{'-error_handler'});
3941 }
3942
3943 ## ----------------------------------------------------------------------
3944 ## functions printing or outputting HTML: navigation
3945
3946 sub git_print_page_nav {
3947         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3948         $extra = '' if !defined $extra; # pager or formats
3949
3950         my @navs = qw(summary shortlog log commit commitdiff tree);
3951         if ($suppress) {
3952                 @navs = grep { $_ ne $suppress } @navs;
3953         }
3954
3955         my %arg = map { $_ => {action=>$_} } @navs;
3956         if (defined $head) {
3957                 for (qw(commit commitdiff)) {
3958                         $arg{$_}{'hash'} = $head;
3959                 }
3960                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3961                         for (qw(shortlog log)) {
3962                                 $arg{$_}{'hash'} = $head;
3963                         }
3964                 }
3965         }
3966
3967         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3968         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3969
3970         my @actions = gitweb_get_feature('actions');
3971         my %repl = (
3972                 '%' => '%',
3973                 'n' => $project,         # project name
3974                 'f' => $git_dir,         # project path within filesystem
3975                 'h' => $treehead || '',  # current hash ('h' parameter)
3976                 'b' => $treebase || '',  # hash base ('hb' parameter)
3977         );
3978         while (@actions) {
3979                 my ($label, $link, $pos) = splice(@actions,0,3);
3980                 # insert
3981                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3982                 # munch munch
3983                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3984                 $arg{$label}{'_href'} = $link;
3985         }
3986
3987         print "<div class=\"page_nav\">\n" .
3988                 (join " | ",
3989                  map { $_ eq $current ?
3990                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3991                  } @navs);
3992         print "<br/>\n$extra<br/>\n" .
3993               "</div>\n";
3994 }
3995
3996 # returns a submenu for the nagivation of the refs views (tags, heads,
3997 # remotes) with the current view disabled and the remotes view only
3998 # available if the feature is enabled
3999 sub format_ref_views {
4000         my ($current) = @_;
4001         my @ref_views = qw{tags heads};
4002         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4003         return join " | ", map {
4004                 $_ eq $current ? $_ :
4005                 $cgi->a({-href => href(action=>$_)}, $_)
4006         } @ref_views
4007 }
4008
4009 sub format_paging_nav {
4010         my ($action, $page, $has_next_link) = @_;
4011         my $paging_nav;
4012
4013
4014         if ($page > 0) {
4015                 $paging_nav .=
4016                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4017                         " &sdot; " .
4018                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4019                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4020         } else {
4021                 $paging_nav .= "first &sdot; prev";
4022         }
4023
4024         if ($has_next_link) {
4025                 $paging_nav .= " &sdot; " .
4026                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4027                                  -accesskey => "n", -title => "Alt-n"}, "next");
4028         } else {
4029                 $paging_nav .= " &sdot; next";
4030         }
4031
4032         return $paging_nav;
4033 }
4034
4035 ## ......................................................................
4036 ## functions printing or outputting HTML: div
4037
4038 sub git_print_header_div {
4039         my ($action, $title, $hash, $hash_base) = @_;
4040         my %args = ();
4041
4042         $args{'action'} = $action;
4043         $args{'hash'} = $hash if $hash;
4044         $args{'hash_base'} = $hash_base if $hash_base;
4045
4046         print "<div class=\"header\">\n" .
4047               $cgi->a({-href => href(%args), -class => "title"},
4048               $title ? $title : $action) .
4049               "\n</div>\n";
4050 }
4051
4052 sub format_repo_url {
4053         my ($name, $url) = @_;
4054         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4055 }
4056
4057 # Group output by placing it in a DIV element and adding a header.
4058 # Options for start_div() can be provided by passing a hash reference as the
4059 # first parameter to the function.
4060 # Options to git_print_header_div() can be provided by passing an array
4061 # reference. This must follow the options to start_div if they are present.
4062 # The content can be a scalar, which is output as-is, a scalar reference, which
4063 # is output after html escaping, an IO handle passed either as *handle or
4064 # *handle{IO}, or a function reference. In the latter case all following
4065 # parameters will be taken as argument to the content function call.
4066 sub git_print_section {
4067         my ($div_args, $header_args, $content);
4068         my $arg = shift;
4069         if (ref($arg) eq 'HASH') {
4070                 $div_args = $arg;
4071                 $arg = shift;
4072         }
4073         if (ref($arg) eq 'ARRAY') {
4074                 $header_args = $arg;
4075                 $arg = shift;
4076         }
4077         $content = $arg;
4078
4079         print $cgi->start_div($div_args);
4080         git_print_header_div(@$header_args);
4081
4082         if (ref($content) eq 'CODE') {
4083                 $content->(@_);
4084         } elsif (ref($content) eq 'SCALAR') {
4085                 print esc_html($$content);
4086         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4087                 print <$content>;
4088         } elsif (!ref($content) && defined($content)) {
4089                 print $content;
4090         }
4091
4092         print $cgi->end_div;
4093 }
4094
4095 sub format_timestamp_html {
4096         my $date = shift;
4097         my $strtime = $date->{'rfc2822'};
4098
4099         my $localtime_format = '(%02d:%02d %s)';
4100         if ($date->{'hour_local'} < 6) {
4101                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4102         }
4103         $strtime .= ' ' .
4104                     sprintf($localtime_format,
4105                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4106
4107         return $strtime;
4108 }
4109
4110 # Outputs the author name and date in long form
4111 sub git_print_authorship {
4112         my $co = shift;
4113         my %opts = @_;
4114         my $tag = $opts{-tag} || 'div';
4115         my $author = $co->{'author_name'};
4116
4117         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4118         print "<$tag class=\"author_date\">" .
4119               format_search_author($author, "author", esc_html($author)) .
4120               " [".format_timestamp_html(\%ad)."]".
4121               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4122               "</$tag>\n";
4123 }
4124
4125 # Outputs table rows containing the full author or committer information,
4126 # in the format expected for 'commit' view (& similar).
4127 # Parameters are a commit hash reference, followed by the list of people
4128 # to output information for. If the list is empty it defaults to both
4129 # author and committer.
4130 sub git_print_authorship_rows {
4131         my $co = shift;
4132         # too bad we can't use @people = @_ || ('author', 'committer')
4133         my @people = @_;
4134         @people = ('author', 'committer') unless @people;
4135         foreach my $who (@people) {
4136                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4137                 print "<tr><td>$who</td><td>" .
4138                       format_search_author($co->{"${who}_name"}, $who,
4139                                            esc_html($co->{"${who}_name"})) . " " .
4140                       format_search_author($co->{"${who}_email"}, $who,
4141                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4142                       "</td><td rowspan=\"2\">" .
4143                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4144                       "</td></tr>\n" .
4145                       "<tr>" .
4146                       "<td></td><td>" .
4147                       format_timestamp_html(\%wd) .
4148                       "</td>" .
4149                       "</tr>\n";
4150         }
4151 }
4152
4153 sub git_print_page_path {
4154         my $name = shift;
4155         my $type = shift;
4156         my $hb = shift;
4157
4158
4159         print "<div class=\"page_path\">";
4160         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4161                       -title => 'tree root'}, to_utf8("[$project]"));
4162         print " / ";
4163         if (defined $name) {
4164                 my @dirname = split '/', $name;
4165                 my $basename = pop @dirname;
4166                 my $fullname = '';
4167
4168                 foreach my $dir (@dirname) {
4169                         $fullname .= ($fullname ? '/' : '') . $dir;
4170                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4171                                                      hash_base=>$hb),
4172                                       -title => $fullname}, esc_path($dir));
4173                         print " / ";
4174                 }
4175                 if (defined $type && $type eq 'blob') {
4176                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4177                                                      hash_base=>$hb),
4178                                       -title => $name}, esc_path($basename));
4179                 } elsif (defined $type && $type eq 'tree') {
4180                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4181                                                      hash_base=>$hb),
4182                                       -title => $name}, esc_path($basename));
4183                         print " / ";
4184                 } else {
4185                         print esc_path($basename);
4186                 }
4187         }
4188         print "<br/></div>\n";
4189 }
4190
4191 sub git_print_log {
4192         my $log = shift;
4193         my %opts = @_;
4194
4195         if ($opts{'-remove_title'}) {
4196                 # remove title, i.e. first line of log
4197                 shift @$log;
4198         }
4199         # remove leading empty lines
4200         while (defined $log->[0] && $log->[0] eq "") {
4201                 shift @$log;
4202         }
4203
4204         # print log
4205         my $signoff = 0;
4206         my $empty = 0;
4207         foreach my $line (@$log) {
4208                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4209                         $signoff = 1;
4210                         $empty = 0;
4211                         if (! $opts{'-remove_signoff'}) {
4212                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4213                                 next;
4214                         } else {
4215                                 # remove signoff lines
4216                                 next;
4217                         }
4218                 } else {
4219                         $signoff = 0;
4220                 }
4221
4222                 # print only one empty line
4223                 # do not print empty line after signoff
4224                 if ($line eq "") {
4225                         next if ($empty || $signoff);
4226                         $empty = 1;
4227                 } else {
4228                         $empty = 0;
4229                 }
4230
4231                 print format_log_line_html($line) . "<br/>\n";
4232         }
4233
4234         if ($opts{'-final_empty_line'}) {
4235                 # end with single empty line
4236                 print "<br/>\n" unless $empty;
4237         }
4238 }
4239
4240 # return link target (what link points to)
4241 sub git_get_link_target {
4242         my $hash = shift;
4243         my $link_target;
4244
4245         # read link
4246         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4247                 or return;
4248         {
4249                 local $/ = undef;
4250                 $link_target = <$fd>;
4251         }
4252         close $fd
4253                 or return;
4254
4255         return $link_target;
4256 }
4257
4258 # given link target, and the directory (basedir) the link is in,
4259 # return target of link relative to top directory (top tree);
4260 # return undef if it is not possible (including absolute links).
4261 sub normalize_link_target {
4262         my ($link_target, $basedir) = @_;
4263
4264         # absolute symlinks (beginning with '/') cannot be normalized
4265         return if (substr($link_target, 0, 1) eq '/');
4266
4267         # normalize link target to path from top (root) tree (dir)
4268         my $path;
4269         if ($basedir) {
4270                 $path = $basedir . '/' . $link_target;
4271         } else {
4272                 # we are in top (root) tree (dir)
4273                 $path = $link_target;
4274         }
4275
4276         # remove //, /./, and /../
4277         my @path_parts;
4278         foreach my $part (split('/', $path)) {
4279                 # discard '.' and ''
4280                 next if (!$part || $part eq '.');
4281                 # handle '..'
4282                 if ($part eq '..') {
4283                         if (@path_parts) {
4284                                 pop @path_parts;
4285                         } else {
4286                                 # link leads outside repository (outside top dir)
4287                                 return;
4288                         }
4289                 } else {
4290                         push @path_parts, $part;
4291                 }
4292         }
4293         $path = join('/', @path_parts);
4294
4295         return $path;
4296 }
4297
4298 # print tree entry (row of git_tree), but without encompassing <tr> element
4299 sub git_print_tree_entry {
4300         my ($t, $basedir, $hash_base, $have_blame) = @_;
4301
4302         my %base_key = ();
4303         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4304
4305         # The format of a table row is: mode list link.  Where mode is
4306         # the mode of the entry, list is the name of the entry, an href,
4307         # and link is the action links of the entry.
4308
4309         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4310         if (exists $t->{'size'}) {
4311                 print "<td class=\"size\">$t->{'size'}</td>\n";
4312         }
4313         if ($t->{'type'} eq "blob") {
4314                 print "<td class=\"list\">" .
4315                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4316                                                file_name=>"$basedir$t->{'name'}", %base_key),
4317                                 -class => "list"}, esc_path($t->{'name'}));
4318                 if (S_ISLNK(oct $t->{'mode'})) {
4319                         my $link_target = git_get_link_target($t->{'hash'});
4320                         if ($link_target) {
4321                                 my $norm_target = normalize_link_target($link_target, $basedir);
4322                                 if (defined $norm_target) {
4323                                         print " -> " .
4324                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4325                                                                      file_name=>$norm_target),
4326                                                        -title => $norm_target}, esc_path($link_target));
4327                                 } else {
4328                                         print " -> " . esc_path($link_target);
4329                                 }
4330                         }
4331                 }
4332                 print "</td>\n";
4333                 print "<td class=\"link\">";
4334                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4335                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4336                               "blob");
4337                 if ($have_blame) {
4338                         print " | " .
4339                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4340                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4341                                       "blame");
4342                 }
4343                 if (defined $hash_base) {
4344                         print " | " .
4345                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4346                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4347                                       "history");
4348                 }
4349                 print " | " .
4350                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4351                                                file_name=>"$basedir$t->{'name'}")},
4352                                 "raw");
4353                 print "</td>\n";
4354
4355         } elsif ($t->{'type'} eq "tree") {
4356                 print "<td class=\"list\">";
4357                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4358                                              file_name=>"$basedir$t->{'name'}",
4359                                              %base_key)},
4360                               esc_path($t->{'name'}));
4361                 print "</td>\n";
4362                 print "<td class=\"link\">";
4363                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4364                                              file_name=>"$basedir$t->{'name'}",
4365                                              %base_key)},
4366                               "tree");
4367                 if (defined $hash_base) {
4368                         print " | " .
4369                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4370                                                      file_name=>"$basedir$t->{'name'}")},
4371                                       "history");
4372                 }
4373                 print "</td>\n";
4374         } else {
4375                 # unknown object: we can only present history for it
4376                 # (this includes 'commit' object, i.e. submodule support)
4377                 print "<td class=\"list\">" .
4378                       esc_path($t->{'name'}) .
4379                       "</td>\n";
4380                 print "<td class=\"link\">";
4381                 if (defined $hash_base) {
4382                         print $cgi->a({-href => href(action=>"history",
4383                                                      hash_base=>$hash_base,
4384                                                      file_name=>"$basedir$t->{'name'}")},
4385                                       "history");
4386                 }
4387                 print "</td>\n";
4388         }
4389 }
4390
4391 ## ......................................................................
4392 ## functions printing large fragments of HTML
4393
4394 # get pre-image filenames for merge (combined) diff
4395 sub fill_from_file_info {
4396         my ($diff, @parents) = @_;
4397
4398         $diff->{'from_file'} = [ ];
4399         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4400         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4401                 if ($diff->{'status'}[$i] eq 'R' ||
4402                     $diff->{'status'}[$i] eq 'C') {
4403                         $diff->{'from_file'}[$i] =
4404                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4405                 }
4406         }
4407
4408         return $diff;
4409 }
4410
4411 # is current raw difftree line of file deletion
4412 sub is_deleted {
4413         my $diffinfo = shift;
4414
4415         return $diffinfo->{'to_id'} eq ('0' x 40);
4416 }
4417
4418 # does patch correspond to [previous] difftree raw line
4419 # $diffinfo  - hashref of parsed raw diff format
4420 # $patchinfo - hashref of parsed patch diff format
4421 #              (the same keys as in $diffinfo)
4422 sub is_patch_split {
4423         my ($diffinfo, $patchinfo) = @_;
4424
4425         return defined $diffinfo && defined $patchinfo
4426                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4427 }
4428
4429
4430 sub git_difftree_body {
4431         my ($difftree, $hash, @parents) = @_;
4432         my ($parent) = $parents[0];
4433         my $have_blame = gitweb_check_feature('blame');
4434         print "<div class=\"list_head\">\n";
4435         if ($#{$difftree} > 10) {
4436                 print(($#{$difftree} + 1) . " files changed:\n");
4437         }
4438         print "</div>\n";
4439
4440         print "<table class=\"" .
4441               (@parents > 1 ? "combined " : "") .
4442               "diff_tree\">\n";
4443
4444         # header only for combined diff in 'commitdiff' view
4445         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4446         if ($has_header) {
4447                 # table header
4448                 print "<thead><tr>\n" .
4449                        "<th></th><th></th>\n"; # filename, patchN link
4450                 for (my $i = 0; $i < @parents; $i++) {
4451                         my $par = $parents[$i];
4452                         print "<th>" .
4453                               $cgi->a({-href => href(action=>"commitdiff",
4454                                                      hash=>$hash, hash_parent=>$par),
4455                                        -title => 'commitdiff to parent number ' .
4456                                                   ($i+1) . ': ' . substr($par,0,7)},
4457                                       $i+1) .
4458                               "&nbsp;</th>\n";
4459                 }
4460                 print "</tr></thead>\n<tbody>\n";
4461         }
4462
4463         my $alternate = 1;
4464         my $patchno = 0;
4465         foreach my $line (@{$difftree}) {
4466                 my $diff = parsed_difftree_line($line);
4467
4468                 if ($alternate) {
4469                         print "<tr class=\"dark\">\n";
4470                 } else {
4471                         print "<tr class=\"light\">\n";
4472                 }
4473                 $alternate ^= 1;
4474
4475                 if (exists $diff->{'nparents'}) { # combined diff
4476
4477                         fill_from_file_info($diff, @parents)
4478                                 unless exists $diff->{'from_file'};
4479
4480                         if (!is_deleted($diff)) {
4481                                 # file exists in the result (child) commit
4482                                 print "<td>" .
4483                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4484                                                              file_name=>$diff->{'to_file'},
4485                                                              hash_base=>$hash),
4486                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4487                                       "</td>\n";
4488                         } else {
4489                                 print "<td>" .
4490                                       esc_path($diff->{'to_file'}) .
4491                                       "</td>\n";
4492                         }
4493
4494                         if ($action eq 'commitdiff') {
4495                                 # link to patch
4496                                 $patchno++;
4497                                 print "<td class=\"link\">" .
4498                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4499                                               "patch") .
4500                                       " | " .
4501                                       "</td>\n";
4502                         }
4503
4504                         my $has_history = 0;
4505                         my $not_deleted = 0;
4506                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4507                                 my $hash_parent = $parents[$i];
4508                                 my $from_hash = $diff->{'from_id'}[$i];
4509                                 my $from_path = $diff->{'from_file'}[$i];
4510                                 my $status = $diff->{'status'}[$i];
4511
4512                                 $has_history ||= ($status ne 'A');
4513                                 $not_deleted ||= ($status ne 'D');
4514
4515                                 if ($status eq 'A') {
4516                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4517                                 } elsif ($status eq 'D') {
4518                                         print "<td class=\"link\">" .
4519                                               $cgi->a({-href => href(action=>"blob",
4520                                                                      hash_base=>$hash,
4521                                                                      hash=>$from_hash,
4522                                                                      file_name=>$from_path)},
4523                                                       "blob" . ($i+1)) .
4524                                               " | </td>\n";
4525                                 } else {
4526                                         if ($diff->{'to_id'} eq $from_hash) {
4527                                                 print "<td class=\"link nochange\">";
4528                                         } else {
4529                                                 print "<td class=\"link\">";
4530                                         }
4531                                         print $cgi->a({-href => href(action=>"blobdiff",
4532                                                                      hash=>$diff->{'to_id'},
4533                                                                      hash_parent=>$from_hash,
4534                                                                      hash_base=>$hash,
4535                                                                      hash_parent_base=>$hash_parent,
4536                                                                      file_name=>$diff->{'to_file'},
4537                                                                      file_parent=>$from_path)},
4538                                                       "diff" . ($i+1)) .
4539                                               " | </td>\n";
4540                                 }
4541                         }
4542
4543                         print "<td class=\"link\">";
4544                         if ($not_deleted) {
4545                                 print $cgi->a({-href => href(action=>"blob",
4546                                                              hash=>$diff->{'to_id'},
4547                                                              file_name=>$diff->{'to_file'},
4548                                                              hash_base=>$hash)},
4549                                               "blob");
4550                                 print " | " if ($has_history);
4551                         }
4552                         if ($has_history) {
4553                                 print $cgi->a({-href => href(action=>"history",
4554                                                              file_name=>$diff->{'to_file'},
4555                                                              hash_base=>$hash)},
4556                                               "history");
4557                         }
4558                         print "</td>\n";
4559
4560                         print "</tr>\n";
4561                         next; # instead of 'else' clause, to avoid extra indent
4562                 }
4563                 # else ordinary diff
4564
4565                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4566                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4567                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4568                         $to_mode_oct = oct $diff->{'to_mode'};
4569                         if (S_ISREG($to_mode_oct)) { # only for regular file
4570                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4571                         }
4572                         $to_file_type = file_type($diff->{'to_mode'});
4573                 }
4574                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4575                         $from_mode_oct = oct $diff->{'from_mode'};
4576                         if (S_ISREG($from_mode_oct)) { # only for regular file
4577                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4578                         }
4579                         $from_file_type = file_type($diff->{'from_mode'});
4580                 }
4581
4582                 if ($diff->{'status'} eq "A") { # created
4583                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4584                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4585                         $mode_chng   .= "]</span>";
4586                         print "<td>";
4587                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4588                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4589                                       -class => "list"}, esc_path($diff->{'file'}));
4590                         print "</td>\n";
4591                         print "<td>$mode_chng</td>\n";
4592                         print "<td class=\"link\">";
4593                         if ($action eq 'commitdiff') {
4594                                 # link to patch
4595                                 $patchno++;
4596                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4597                                               "patch") .
4598                                       " | ";
4599                         }
4600                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4601                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4602                                       "blob");
4603                         print "</td>\n";
4604
4605                 } elsif ($diff->{'status'} eq "D") { # deleted
4606                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4607                         print "<td>";
4608                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4609                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4610                                        -class => "list"}, esc_path($diff->{'file'}));
4611                         print "</td>\n";
4612                         print "<td>$mode_chng</td>\n";
4613                         print "<td class=\"link\">";
4614                         if ($action eq 'commitdiff') {
4615                                 # link to patch
4616                                 $patchno++;
4617                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4618                                               "patch") .
4619                                       " | ";
4620                         }
4621                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4622                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4623                                       "blob") . " | ";
4624                         if ($have_blame) {
4625                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4626                                                              file_name=>$diff->{'file'})},
4627                                               "blame") . " | ";
4628                         }
4629                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4630                                                      file_name=>$diff->{'file'})},
4631                                       "history");
4632                         print "</td>\n";
4633
4634                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4635                         my $mode_chnge = "";
4636                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4637                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4638                                 if ($from_file_type ne $to_file_type) {
4639                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4640                                 }
4641                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4642                                         if ($from_mode_str && $to_mode_str) {
4643                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4644                                         } elsif ($to_mode_str) {
4645                                                 $mode_chnge .= " mode: $to_mode_str";
4646                                         }
4647                                 }
4648                                 $mode_chnge .= "]</span>\n";
4649                         }
4650                         print "<td>";
4651                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4652                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4653                                       -class => "list"}, esc_path($diff->{'file'}));
4654                         print "</td>\n";
4655                         print "<td>$mode_chnge</td>\n";
4656                         print "<td class=\"link\">";
4657                         if ($action eq 'commitdiff') {
4658                                 # link to patch
4659                                 $patchno++;
4660                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4661                                               "patch") .
4662                                       " | ";
4663                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4664                                 # "commit" view and modified file (not onlu mode changed)
4665                                 print $cgi->a({-href => href(action=>"blobdiff",
4666                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4667                                                              hash_base=>$hash, hash_parent_base=>$parent,
4668                                                              file_name=>$diff->{'file'})},
4669                                               "diff") .
4670                                       " | ";
4671                         }
4672                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4673                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4674                                        "blob") . " | ";
4675                         if ($have_blame) {
4676                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4677                                                              file_name=>$diff->{'file'})},
4678                                               "blame") . " | ";
4679                         }
4680                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4681                                                      file_name=>$diff->{'file'})},
4682                                       "history");
4683                         print "</td>\n";
4684
4685                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4686                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4687                         my $nstatus = $status_name{$diff->{'status'}};
4688                         my $mode_chng = "";
4689                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4690                                 # mode also for directories, so we cannot use $to_mode_str
4691                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4692                         }
4693                         print "<td>" .
4694                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4695                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4696                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4697                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4698                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4699                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4700                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4701                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4702                               "<td class=\"link\">";
4703                         if ($action eq 'commitdiff') {
4704                                 # link to patch
4705                                 $patchno++;
4706                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4707                                               "patch") .
4708                                       " | ";
4709                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4710                                 # "commit" view and modified file (not only pure rename or copy)
4711                                 print $cgi->a({-href => href(action=>"blobdiff",
4712                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4713                                                              hash_base=>$hash, hash_parent_base=>$parent,
4714                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4715                                               "diff") .
4716                                       " | ";
4717                         }
4718                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4719                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4720                                       "blob") . " | ";
4721                         if ($have_blame) {
4722                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4723                                                              file_name=>$diff->{'to_file'})},
4724                                               "blame") . " | ";
4725                         }
4726                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4727                                                     file_name=>$diff->{'to_file'})},
4728                                       "history");
4729                         print "</td>\n";
4730
4731                 } # we should not encounter Unmerged (U) or Unknown (X) status
4732                 print "</tr>\n";
4733         }
4734         print "</tbody>" if $has_header;
4735         print "</table>\n";
4736 }
4737
4738 sub git_patchset_body {
4739         my ($fd, $difftree, $hash, @hash_parents) = @_;
4740         my ($hash_parent) = $hash_parents[0];
4741
4742         my $is_combined = (@hash_parents > 1);
4743         my $patch_idx = 0;
4744         my $patch_number = 0;
4745         my $patch_line;
4746         my $diffinfo;
4747         my $to_name;
4748         my (%from, %to);
4749
4750         print "<div class=\"patchset\">\n";
4751
4752         # skip to first patch
4753         while ($patch_line = <$fd>) {
4754                 chomp $patch_line;
4755
4756                 last if ($patch_line =~ m/^diff /);
4757         }
4758
4759  PATCH:
4760         while ($patch_line) {
4761
4762                 # parse "git diff" header line
4763                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4764                         # $1 is from_name, which we do not use
4765                         $to_name = unquote($2);
4766                         $to_name =~ s!^b/!!;
4767                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4768                         # $1 is 'cc' or 'combined', which we do not use
4769                         $to_name = unquote($2);
4770                 } else {
4771                         $to_name = undef;
4772                 }
4773
4774                 # check if current patch belong to current raw line
4775                 # and parse raw git-diff line if needed
4776                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4777                         # this is continuation of a split patch
4778                         print "<div class=\"patch cont\">\n";
4779                 } else {
4780                         # advance raw git-diff output if needed
4781                         $patch_idx++ if defined $diffinfo;
4782
4783                         # read and prepare patch information
4784                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4785
4786                         # compact combined diff output can have some patches skipped
4787                         # find which patch (using pathname of result) we are at now;
4788                         if ($is_combined) {
4789                                 while ($to_name ne $diffinfo->{'to_file'}) {
4790                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4791                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4792                                               "</div>\n";  # class="patch"
4793
4794                                         $patch_idx++;
4795                                         $patch_number++;
4796
4797                                         last if $patch_idx > $#$difftree;
4798                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4799                                 }
4800                         }
4801
4802                         # modifies %from, %to hashes
4803                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4804
4805                         # this is first patch for raw difftree line with $patch_idx index
4806                         # we index @$difftree array from 0, but number patches from 1
4807                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4808                 }
4809
4810                 # git diff header
4811                 #assert($patch_line =~ m/^diff /) if DEBUG;
4812                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4813                 $patch_number++;
4814                 # print "git diff" header
4815                 print format_git_diff_header_line($patch_line, $diffinfo,
4816                                                   \%from, \%to);
4817
4818                 # print extended diff header
4819                 print "<div class=\"diff extended_header\">\n";
4820         EXTENDED_HEADER:
4821                 while ($patch_line = <$fd>) {
4822                         chomp $patch_line;
4823
4824                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4825
4826                         print format_extended_diff_header_line($patch_line, $diffinfo,
4827                                                                \%from, \%to);
4828                 }
4829                 print "</div>\n"; # class="diff extended_header"
4830
4831                 # from-file/to-file diff header
4832                 if (! $patch_line) {
4833                         print "</div>\n"; # class="patch"
4834                         last PATCH;
4835                 }
4836                 next PATCH if ($patch_line =~ m/^diff /);
4837                 #assert($patch_line =~ m/^---/) if DEBUG;
4838
4839                 my $last_patch_line = $patch_line;
4840                 $patch_line = <$fd>;
4841                 chomp $patch_line;
4842                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4843
4844                 print format_diff_from_to_header($last_patch_line, $patch_line,
4845                                                  $diffinfo, \%from, \%to,
4846                                                  @hash_parents);
4847
4848                 # the patch itself
4849         LINE:
4850                 while ($patch_line = <$fd>) {
4851                         chomp $patch_line;
4852
4853                         next PATCH if ($patch_line =~ m/^diff /);
4854
4855                         print format_diff_line($patch_line, \%from, \%to);
4856                 }
4857
4858         } continue {
4859                 print "</div>\n"; # class="patch"
4860         }
4861
4862         # for compact combined (--cc) format, with chunk and patch simplification
4863         # the patchset might be empty, but there might be unprocessed raw lines
4864         for (++$patch_idx if $patch_number > 0;
4865              $patch_idx < @$difftree;
4866              ++$patch_idx) {
4867                 # read and prepare patch information
4868                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4869
4870                 # generate anchor for "patch" links in difftree / whatchanged part
4871                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4872                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4873                       "</div>\n";  # class="patch"
4874
4875                 $patch_number++;
4876         }
4877
4878         if ($patch_number == 0) {
4879                 if (@hash_parents > 1) {
4880                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4881                 } else {
4882                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4883                 }
4884         }
4885
4886         print "</div>\n"; # class="patchset"
4887 }
4888
4889 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4890
4891 # fills project list info (age, description, owner, category, forks)
4892 # for each project in the list, removing invalid projects from
4893 # returned list
4894 # NOTE: modifies $projlist, but does not remove entries from it
4895 sub fill_project_list_info {
4896         my $projlist = shift;
4897         my @projects;
4898
4899         my $show_ctags = gitweb_check_feature('ctags');
4900  PROJECT:
4901         foreach my $pr (@$projlist) {
4902                 my (@activity) = git_get_last_activity($pr->{'path'});
4903                 unless (@activity) {
4904                         next PROJECT;
4905                 }
4906                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4907                 if (!defined $pr->{'descr'}) {
4908                         my $descr = git_get_project_description($pr->{'path'}) || "";
4909                         $descr = to_utf8($descr);
4910                         $pr->{'descr_long'} = $descr;
4911                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4912                 }
4913                 if (!defined $pr->{'owner'}) {
4914                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4915                 }
4916                 if ($show_ctags) {
4917                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4918                 }
4919                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
4920                         my $cat = git_get_project_category($pr->{'path'}) ||
4921                                                            $project_list_default_category;
4922                         $pr->{'category'} = to_utf8($cat);
4923                 }
4924
4925                 push @projects, $pr;
4926         }
4927
4928         return @projects;
4929 }
4930
4931 sub sort_projects_list {
4932         my ($projlist, $order) = @_;
4933         my @projects;
4934
4935         my %order_info = (
4936                 project => { key => 'path', type => 'str' },
4937                 descr => { key => 'descr_long', type => 'str' },
4938                 owner => { key => 'owner', type => 'str' },
4939                 age => { key => 'age', type => 'num' }
4940         );
4941         my $oi = $order_info{$order};
4942         return @$projlist unless defined $oi;
4943         if ($oi->{'type'} eq 'str') {
4944                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4945         } else {
4946                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4947         }
4948
4949         return @projects;
4950 }
4951
4952 # returns a hash of categories, containing the list of project
4953 # belonging to each category
4954 sub build_projlist_by_category {
4955         my ($projlist, $from, $to) = @_;
4956         my %categories;
4957
4958         $from = 0 unless defined $from;
4959         $to = $#$projlist if (!defined $to || $#$projlist < $to);
4960
4961         for (my $i = $from; $i <= $to; $i++) {
4962                 my $pr = $projlist->[$i];
4963                 push @{$categories{ $pr->{'category'} }}, $pr;
4964         }
4965
4966         return wantarray ? %categories : \%categories;
4967 }
4968
4969 # print 'sort by' <th> element, generating 'sort by $name' replay link
4970 # if that order is not selected
4971 sub print_sort_th {
4972         print format_sort_th(@_);
4973 }
4974
4975 sub format_sort_th {
4976         my ($name, $order, $header) = @_;
4977         my $sort_th = "";
4978         $header ||= ucfirst($name);
4979
4980         if ($order eq $name) {
4981                 $sort_th .= "<th>$header</th>\n";
4982         } else {
4983                 $sort_th .= "<th>" .
4984                             $cgi->a({-href => href(-replay=>1, order=>$name),
4985                                      -class => "header"}, $header) .
4986                             "</th>\n";
4987         }
4988
4989         return $sort_th;
4990 }
4991
4992 sub git_project_list_rows {
4993         my ($projlist, $from, $to, $check_forks) = @_;
4994
4995         $from = 0 unless defined $from;
4996         $to = $#$projlist if (!defined $to || $#$projlist < $to);
4997
4998         my $alternate = 1;
4999         for (my $i = $from; $i <= $to; $i++) {
5000                 my $pr = $projlist->[$i];
5001
5002                 if ($alternate) {
5003                         print "<tr class=\"dark\">\n";
5004                 } else {
5005                         print "<tr class=\"light\">\n";
5006                 }
5007                 $alternate ^= 1;
5008
5009                 if ($check_forks) {
5010                         print "<td>";
5011                         if ($pr->{'forks'}) {
5012                                 my $nforks = scalar @{$pr->{'forks'}};
5013                                 if ($nforks > 0) {
5014                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5015                                                        -title => "$nforks forks"}, "+");
5016                                 } else {
5017                                         print $cgi->span({-title => "$nforks forks"}, "+");
5018                                 }
5019                         }
5020                         print "</td>\n";
5021                 }
5022                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5023                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5024                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5025                                         -class => "list", -title => $pr->{'descr_long'}},
5026                                         esc_html($pr->{'descr'})) . "</td>\n" .
5027                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5028                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5029                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5030                       "<td class=\"link\">" .
5031                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5032                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5033                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5034                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5035                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5036                       "</td>\n" .
5037                       "</tr>\n";
5038         }
5039 }
5040
5041 sub git_project_list_body {
5042         # actually uses global variable $project
5043         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5044         my @projects = @$projlist;
5045
5046         my $check_forks = gitweb_check_feature('forks');
5047         my $show_ctags  = gitweb_check_feature('ctags');
5048         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5049         $check_forks = undef
5050                 if ($tagfilter || $searchtext);
5051
5052         # filtering out forks before filling info allows to do less work
5053         @projects = filter_forks_from_projects_list(\@projects)
5054                 if ($check_forks);
5055         @projects = fill_project_list_info(\@projects);
5056         # searching projects require filling to be run before it
5057         @projects = search_projects_list(\@projects,
5058                                          'searchtext' => $searchtext,
5059                                          'tagfilter'  => $tagfilter)
5060                 if ($tagfilter || $searchtext);
5061
5062         $order ||= $default_projects_order;
5063         $from = 0 unless defined $from;
5064         $to = $#projects if (!defined $to || $#projects < $to);
5065
5066         # short circuit
5067         if ($from > $to) {
5068                 print "<center>\n".
5069                       "<b>No such projects found</b><br />\n".
5070                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5071                       "</center>\n<br />\n";
5072                 return;
5073         }
5074
5075         @projects = sort_projects_list(\@projects, $order);
5076
5077         if ($show_ctags) {
5078                 my $ctags = git_gather_all_ctags(\@projects);
5079                 my $cloud = git_populate_project_tagcloud($ctags);
5080                 print git_show_project_tagcloud($cloud, 64);
5081         }
5082
5083         print "<table class=\"project_list\">\n";
5084         unless ($no_header) {
5085                 print "<tr>\n";
5086                 if ($check_forks) {
5087                         print "<th></th>\n";
5088                 }
5089                 print_sort_th('project', $order, 'Project');
5090                 print_sort_th('descr', $order, 'Description');
5091                 print_sort_th('owner', $order, 'Owner');
5092                 print_sort_th('age', $order, 'Last Change');
5093                 print "<th></th>\n" . # for links
5094                       "</tr>\n";
5095         }
5096
5097         if ($projects_list_group_categories) {
5098                 # only display categories with projects in the $from-$to window
5099                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5100                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5101                 foreach my $cat (sort keys %categories) {
5102                         unless ($cat eq "") {
5103                                 print "<tr>\n";
5104                                 if ($check_forks) {
5105                                         print "<td></td>\n";
5106                                 }
5107                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5108                                 print "</tr>\n";
5109                         }
5110
5111                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5112                 }
5113         } else {
5114                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5115         }
5116
5117         if (defined $extra) {
5118                 print "<tr>\n";
5119                 if ($check_forks) {
5120                         print "<td></td>\n";
5121                 }
5122                 print "<td colspan=\"5\">$extra</td>\n" .
5123                       "</tr>\n";
5124         }
5125         print "</table>\n";
5126 }
5127
5128 sub git_log_body {
5129         # uses global variable $project
5130         my ($commitlist, $from, $to, $refs, $extra) = @_;
5131
5132         $from = 0 unless defined $from;
5133         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5134
5135         for (my $i = 0; $i <= $to; $i++) {
5136                 my %co = %{$commitlist->[$i]};
5137                 next if !%co;
5138                 my $commit = $co{'id'};
5139                 my $ref = format_ref_marker($refs, $commit);
5140                 git_print_header_div('commit',
5141                                "<span class=\"age\">$co{'age_string'}</span>" .
5142                                esc_html($co{'title'}) . $ref,
5143                                $commit);
5144                 print "<div class=\"title_text\">\n" .
5145                       "<div class=\"log_link\">\n" .
5146                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5147                       " | " .
5148                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5149                       " | " .
5150                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5151                       "<br/>\n" .
5152                       "</div>\n";
5153                       git_print_authorship(\%co, -tag => 'span');
5154                       print "<br/>\n</div>\n";
5155
5156                 print "<div class=\"log_body\">\n";
5157                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5158                 print "</div>\n";
5159         }
5160         if ($extra) {
5161                 print "<div class=\"page_nav\">\n";
5162                 print "$extra\n";
5163                 print "</div>\n";
5164         }
5165 }
5166
5167 sub git_shortlog_body {
5168         # uses global variable $project
5169         my ($commitlist, $from, $to, $refs, $extra) = @_;
5170
5171         $from = 0 unless defined $from;
5172         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5173
5174         print "<table class=\"shortlog\">\n";
5175         my $alternate = 1;
5176         for (my $i = $from; $i <= $to; $i++) {
5177                 my %co = %{$commitlist->[$i]};
5178                 my $commit = $co{'id'};
5179                 my $ref = format_ref_marker($refs, $commit);
5180                 if ($alternate) {
5181                         print "<tr class=\"dark\">\n";
5182                 } else {
5183                         print "<tr class=\"light\">\n";
5184                 }
5185                 $alternate ^= 1;
5186                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5187                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5188                       format_author_html('td', \%co, 10) . "<td>";
5189                 print format_subject_html($co{'title'}, $co{'title_short'},
5190                                           href(action=>"commit", hash=>$commit), $ref);
5191                 print "</td>\n" .
5192                       "<td class=\"link\">" .
5193                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5194                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5195                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5196                 my $snapshot_links = format_snapshot_links($commit);
5197                 if (defined $snapshot_links) {
5198                         print " | " . $snapshot_links;
5199                 }
5200                 print "</td>\n" .
5201                       "</tr>\n";
5202         }
5203         if (defined $extra) {
5204                 print "<tr>\n" .
5205                       "<td colspan=\"4\">$extra</td>\n" .
5206                       "</tr>\n";
5207         }
5208         print "</table>\n";
5209 }
5210
5211 sub git_history_body {
5212         # Warning: assumes constant type (blob or tree) during history
5213         my ($commitlist, $from, $to, $refs, $extra,
5214             $file_name, $file_hash, $ftype) = @_;
5215
5216         $from = 0 unless defined $from;
5217         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5218
5219         print "<table class=\"history\">\n";
5220         my $alternate = 1;
5221         for (my $i = $from; $i <= $to; $i++) {
5222                 my %co = %{$commitlist->[$i]};
5223                 if (!%co) {
5224                         next;
5225                 }
5226                 my $commit = $co{'id'};
5227
5228                 my $ref = format_ref_marker($refs, $commit);
5229
5230                 if ($alternate) {
5231                         print "<tr class=\"dark\">\n";
5232                 } else {
5233                         print "<tr class=\"light\">\n";
5234                 }
5235                 $alternate ^= 1;
5236                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5237         # shortlog:   format_author_html('td', \%co, 10)
5238                       format_author_html('td', \%co, 15, 3) . "<td>";
5239                 # originally git_history used chop_str($co{'title'}, 50)
5240                 print format_subject_html($co{'title'}, $co{'title_short'},
5241                                           href(action=>"commit", hash=>$commit), $ref);
5242                 print "</td>\n" .
5243                       "<td class=\"link\">" .
5244                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5245                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5246
5247                 if ($ftype eq 'blob') {
5248                         my $blob_current = $file_hash;
5249                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5250                         if (defined $blob_current && defined $blob_parent &&
5251                                         $blob_current ne $blob_parent) {
5252                                 print " | " .
5253                                         $cgi->a({-href => href(action=>"blobdiff",
5254                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5255                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5256                                                                file_name=>$file_name)},
5257                                                 "diff to current");
5258                         }
5259                 }
5260                 print "</td>\n" .
5261                       "</tr>\n";
5262         }
5263         if (defined $extra) {
5264                 print "<tr>\n" .
5265                       "<td colspan=\"4\">$extra</td>\n" .
5266                       "</tr>\n";
5267         }
5268         print "</table>\n";
5269 }
5270
5271 sub git_tags_body {
5272         # uses global variable $project
5273         my ($taglist, $from, $to, $extra) = @_;
5274         $from = 0 unless defined $from;
5275         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5276
5277         print "<table class=\"tags\">\n";
5278         my $alternate = 1;
5279         for (my $i = $from; $i <= $to; $i++) {
5280                 my $entry = $taglist->[$i];
5281                 my %tag = %$entry;
5282                 my $comment = $tag{'subject'};
5283                 my $comment_short;
5284                 if (defined $comment) {
5285                         $comment_short = chop_str($comment, 30, 5);
5286                 }
5287                 if ($alternate) {
5288                         print "<tr class=\"dark\">\n";
5289                 } else {
5290                         print "<tr class=\"light\">\n";
5291                 }
5292                 $alternate ^= 1;
5293                 if (defined $tag{'age'}) {
5294                         print "<td><i>$tag{'age'}</i></td>\n";
5295                 } else {
5296                         print "<td></td>\n";
5297                 }
5298                 print "<td>" .
5299                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5300                                -class => "list name"}, esc_html($tag{'name'})) .
5301                       "</td>\n" .
5302                       "<td>";
5303                 if (defined $comment) {
5304                         print format_subject_html($comment, $comment_short,
5305                                                   href(action=>"tag", hash=>$tag{'id'}));
5306                 }
5307                 print "</td>\n" .
5308                       "<td class=\"selflink\">";
5309                 if ($tag{'type'} eq "tag") {
5310                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5311                 } else {
5312                         print "&nbsp;";
5313                 }
5314                 print "</td>\n" .
5315                       "<td class=\"link\">" . " | " .
5316                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5317                 if ($tag{'reftype'} eq "commit") {
5318                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5319                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5320                 } elsif ($tag{'reftype'} eq "blob") {
5321                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5322                 }
5323                 print "</td>\n" .
5324                       "</tr>";
5325         }
5326         if (defined $extra) {
5327                 print "<tr>\n" .
5328                       "<td colspan=\"5\">$extra</td>\n" .
5329                       "</tr>\n";
5330         }
5331         print "</table>\n";
5332 }
5333
5334 sub git_heads_body {
5335         # uses global variable $project
5336         my ($headlist, $head, $from, $to, $extra) = @_;
5337         $from = 0 unless defined $from;
5338         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5339
5340         print "<table class=\"heads\">\n";
5341         my $alternate = 1;
5342         for (my $i = $from; $i <= $to; $i++) {
5343                 my $entry = $headlist->[$i];
5344                 my %ref = %$entry;
5345                 my $curr = $ref{'id'} eq $head;
5346                 if ($alternate) {
5347                         print "<tr class=\"dark\">\n";
5348                 } else {
5349                         print "<tr class=\"light\">\n";
5350                 }
5351                 $alternate ^= 1;
5352                 print "<td><i>$ref{'age'}</i></td>\n" .
5353                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5354                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5355                                -class => "list name"},esc_html($ref{'name'})) .
5356                       "</td>\n" .
5357                       "<td class=\"link\">" .
5358                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5359                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5360                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5361                       "</td>\n" .
5362                       "</tr>";
5363         }
5364         if (defined $extra) {
5365                 print "<tr>\n" .
5366                       "<td colspan=\"3\">$extra</td>\n" .
5367                       "</tr>\n";
5368         }
5369         print "</table>\n";
5370 }
5371
5372 # Display a single remote block
5373 sub git_remote_block {
5374         my ($remote, $rdata, $limit, $head) = @_;
5375
5376         my $heads = $rdata->{'heads'};
5377         my $fetch = $rdata->{'fetch'};
5378         my $push = $rdata->{'push'};
5379
5380         my $urls_table = "<table class=\"projects_list\">\n" ;
5381
5382         if (defined $fetch) {
5383                 if ($fetch eq $push) {
5384                         $urls_table .= format_repo_url("URL", $fetch);
5385                 } else {
5386                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5387                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5388                 }
5389         } elsif (defined $push) {
5390                 $urls_table .= format_repo_url("Push URL", $push);
5391         } else {
5392                 $urls_table .= format_repo_url("", "No remote URL");
5393         }
5394
5395         $urls_table .= "</table>\n";
5396
5397         my $dots;
5398         if (defined $limit && $limit < @$heads) {
5399                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5400         }
5401
5402         print $urls_table;
5403         git_heads_body($heads, $head, 0, $limit, $dots);
5404 }
5405
5406 # Display a list of remote names with the respective fetch and push URLs
5407 sub git_remotes_list {
5408         my ($remotedata, $limit) = @_;
5409         print "<table class=\"heads\">\n";
5410         my $alternate = 1;
5411         my @remotes = sort keys %$remotedata;
5412
5413         my $limited = $limit && $limit < @remotes;
5414
5415         $#remotes = $limit - 1 if $limited;
5416
5417         while (my $remote = shift @remotes) {
5418                 my $rdata = $remotedata->{$remote};
5419                 my $fetch = $rdata->{'fetch'};
5420                 my $push = $rdata->{'push'};
5421                 if ($alternate) {
5422                         print "<tr class=\"dark\">\n";
5423                 } else {
5424                         print "<tr class=\"light\">\n";
5425                 }
5426                 $alternate ^= 1;
5427                 print "<td>" .
5428                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5429                                -class=> "list name"},esc_html($remote)) .
5430                       "</td>";
5431                 print "<td class=\"link\">" .
5432                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5433                       " | " .
5434                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5435                       "</td>";
5436
5437                 print "</tr>\n";
5438         }
5439
5440         if ($limited) {
5441                 print "<tr>\n" .
5442                       "<td colspan=\"3\">" .
5443                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5444                       "</td>\n" . "</tr>\n";
5445         }
5446
5447         print "</table>";
5448 }
5449
5450 # Display remote heads grouped by remote, unless there are too many
5451 # remotes, in which case we only display the remote names
5452 sub git_remotes_body {
5453         my ($remotedata, $limit, $head) = @_;
5454         if ($limit and $limit < keys %$remotedata) {
5455                 git_remotes_list($remotedata, $limit);
5456         } else {
5457                 fill_remote_heads($remotedata);
5458                 while (my ($remote, $rdata) = each %$remotedata) {
5459                         git_print_section({-class=>"remote", -id=>$remote},
5460                                 ["remotes", $remote, $remote], sub {
5461                                         git_remote_block($remote, $rdata, $limit, $head);
5462                                 });
5463                 }
5464         }
5465 }
5466
5467 sub git_search_grep_body {
5468         my ($commitlist, $from, $to, $extra) = @_;
5469         $from = 0 unless defined $from;
5470         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5471
5472         print "<table class=\"commit_search\">\n";
5473         my $alternate = 1;
5474         for (my $i = $from; $i <= $to; $i++) {
5475                 my %co = %{$commitlist->[$i]};
5476                 if (!%co) {
5477                         next;
5478                 }
5479                 my $commit = $co{'id'};
5480                 if ($alternate) {
5481                         print "<tr class=\"dark\">\n";
5482                 } else {
5483                         print "<tr class=\"light\">\n";
5484                 }
5485                 $alternate ^= 1;
5486                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5487                       format_author_html('td', \%co, 15, 5) .
5488                       "<td>" .
5489                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5490                                -class => "list subject"},
5491                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5492                 my $comment = $co{'comment'};
5493                 foreach my $line (@$comment) {
5494                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5495                                 my ($lead, $match, $trail) = ($1, $2, $3);
5496                                 $match = chop_str($match, 70, 5, 'center');
5497                                 my $contextlen = int((80 - length($match))/2);
5498                                 $contextlen = 30 if ($contextlen > 30);
5499                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5500                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5501
5502                                 $lead  = esc_html($lead);
5503                                 $match = esc_html($match);
5504                                 $trail = esc_html($trail);
5505
5506                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5507                         }
5508                 }
5509                 print "</td>\n" .
5510                       "<td class=\"link\">" .
5511                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5512                       " | " .
5513                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5514                       " | " .
5515                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5516                 print "</td>\n" .
5517                       "</tr>\n";
5518         }
5519         if (defined $extra) {
5520                 print "<tr>\n" .
5521                       "<td colspan=\"3\">$extra</td>\n" .
5522                       "</tr>\n";
5523         }
5524         print "</table>\n";
5525 }
5526
5527 ## ======================================================================
5528 ## ======================================================================
5529 ## actions
5530
5531 sub git_project_list {
5532         my $order = $input_params{'order'};
5533         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5534                 die_error(400, "Unknown order parameter");
5535         }
5536
5537         my @list = git_get_projects_list();
5538         if (!@list) {
5539                 die_error(404, "No projects found");
5540         }
5541
5542         git_header_html();
5543         if (defined $home_text && -f $home_text) {
5544                 print "<div class=\"index_include\">\n";
5545                 insert_file($home_text);
5546                 print "</div>\n";
5547         }
5548         print $cgi->startform(-method => "get") .
5549               "<p class=\"projsearch\">Search:\n" .
5550               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5551               "</p>" .
5552               $cgi->end_form() . "\n";
5553         git_project_list_body(\@list, $order);
5554         git_footer_html();
5555 }
5556
5557 sub git_forks {
5558         my $order = $input_params{'order'};
5559         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5560                 die_error(400, "Unknown order parameter");
5561         }
5562
5563         my @list = git_get_projects_list($project);
5564         if (!@list) {
5565                 die_error(404, "No forks found");
5566         }
5567
5568         git_header_html();
5569         git_print_page_nav('','');
5570         git_print_header_div('summary', "$project forks");
5571         git_project_list_body(\@list, $order);
5572         git_footer_html();
5573 }
5574
5575 sub git_project_index {
5576         my @projects = git_get_projects_list();
5577         if (!@projects) {
5578                 die_error(404, "No projects found");
5579         }
5580
5581         print $cgi->header(
5582                 -type => 'text/plain',
5583                 -charset => 'utf-8',
5584                 -content_disposition => 'inline; filename="index.aux"');
5585
5586         foreach my $pr (@projects) {
5587                 if (!exists $pr->{'owner'}) {
5588                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5589                 }
5590
5591                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5592                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5593                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5594                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5595                 $path  =~ s/ /\+/g;
5596                 $owner =~ s/ /\+/g;
5597
5598                 print "$path $owner\n";
5599         }
5600 }
5601
5602 sub git_summary {
5603         my $descr = git_get_project_description($project) || "none";
5604         my %co = parse_commit("HEAD");
5605         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5606         my $head = $co{'id'};
5607         my $remote_heads = gitweb_check_feature('remote_heads');
5608
5609         my $owner = git_get_project_owner($project);
5610
5611         my $refs = git_get_references();
5612         # These get_*_list functions return one more to allow us to see if
5613         # there are more ...
5614         my @taglist  = git_get_tags_list(16);
5615         my @headlist = git_get_heads_list(16);
5616         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5617         my @forklist;
5618         my $check_forks = gitweb_check_feature('forks');
5619
5620         if ($check_forks) {
5621                 # find forks of a project
5622                 @forklist = git_get_projects_list($project);
5623                 # filter out forks of forks
5624                 @forklist = filter_forks_from_projects_list(\@forklist)
5625                         if (@forklist);
5626         }
5627
5628         git_header_html();
5629         git_print_page_nav('summary','', $head);
5630
5631         print "<div class=\"title\">&nbsp;</div>\n";
5632         print "<table class=\"projects_list\">\n" .
5633               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5634               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5635         if (defined $cd{'rfc2822'}) {
5636                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5637                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5638         }
5639
5640         # use per project git URL list in $projectroot/$project/cloneurl
5641         # or make project git URL from git base URL and project name
5642         my $url_tag = "URL";
5643         my @url_list = git_get_project_url_list($project);
5644         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5645         foreach my $git_url (@url_list) {
5646                 next unless $git_url;
5647                 print format_repo_url($url_tag, $git_url);
5648                 $url_tag = "";
5649         }
5650
5651         # Tag cloud
5652         my $show_ctags = gitweb_check_feature('ctags');
5653         if ($show_ctags) {
5654                 my $ctags = git_get_project_ctags($project);
5655                 if (%$ctags) {
5656                         # without ability to add tags, don't show if there are none
5657                         my $cloud = git_populate_project_tagcloud($ctags);
5658                         print "<tr id=\"metadata_ctags\">" .
5659                               "<td>content tags</td>" .
5660                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5661                               "</tr>\n";
5662                 }
5663         }
5664
5665         print "</table>\n";
5666
5667         # If XSS prevention is on, we don't include README.html.
5668         # TODO: Allow a readme in some safe format.
5669         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5670                 print "<div class=\"title\">readme</div>\n" .
5671                       "<div class=\"readme\">\n";
5672                 insert_file("$projectroot/$project/README.html");
5673                 print "\n</div>\n"; # class="readme"
5674         }
5675
5676         # we need to request one more than 16 (0..15) to check if
5677         # those 16 are all
5678         my @commitlist = $head ? parse_commits($head, 17) : ();
5679         if (@commitlist) {
5680                 git_print_header_div('shortlog');
5681                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5682                                   $#commitlist <=  15 ? undef :
5683                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5684         }
5685
5686         if (@taglist) {
5687                 git_print_header_div('tags');
5688                 git_tags_body(\@taglist, 0, 15,
5689                               $#taglist <=  15 ? undef :
5690                               $cgi->a({-href => href(action=>"tags")}, "..."));
5691         }
5692
5693         if (@headlist) {
5694                 git_print_header_div('heads');
5695                 git_heads_body(\@headlist, $head, 0, 15,
5696                                $#headlist <= 15 ? undef :
5697                                $cgi->a({-href => href(action=>"heads")}, "..."));
5698         }
5699
5700         if (%remotedata) {
5701                 git_print_header_div('remotes');
5702                 git_remotes_body(\%remotedata, 15, $head);
5703         }
5704
5705         if (@forklist) {
5706                 git_print_header_div('forks');
5707                 git_project_list_body(\@forklist, 'age', 0, 15,
5708                                       $#forklist <= 15 ? undef :
5709                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5710                                       'no_header');
5711         }
5712
5713         git_footer_html();
5714 }
5715
5716 sub git_tag {
5717         my %tag = parse_tag($hash);
5718
5719         if (! %tag) {
5720                 die_error(404, "Unknown tag object");
5721         }
5722
5723         my $head = git_get_head_hash($project);
5724         git_header_html();
5725         git_print_page_nav('','', $head,undef,$head);
5726         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5727         print "<div class=\"title_text\">\n" .
5728               "<table class=\"object_header\">\n" .
5729               "<tr>\n" .
5730               "<td>object</td>\n" .
5731               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5732                                $tag{'object'}) . "</td>\n" .
5733               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5734                                               $tag{'type'}) . "</td>\n" .
5735               "</tr>\n";
5736         if (defined($tag{'author'})) {
5737                 git_print_authorship_rows(\%tag, 'author');
5738         }
5739         print "</table>\n\n" .
5740               "</div>\n";
5741         print "<div class=\"page_body\">";
5742         my $comment = $tag{'comment'};
5743         foreach my $line (@$comment) {
5744                 chomp $line;
5745                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5746         }
5747         print "</div>\n";
5748         git_footer_html();
5749 }
5750
5751 sub git_blame_common {
5752         my $format = shift || 'porcelain';
5753         if ($format eq 'porcelain' && $cgi->param('js')) {
5754                 $format = 'incremental';
5755                 $action = 'blame_incremental'; # for page title etc
5756         }
5757
5758         # permissions
5759         gitweb_check_feature('blame')
5760                 or die_error(403, "Blame view not allowed");
5761
5762         # error checking
5763         die_error(400, "No file name given") unless $file_name;
5764         $hash_base ||= git_get_head_hash($project);
5765         die_error(404, "Couldn't find base commit") unless $hash_base;
5766         my %co = parse_commit($hash_base)
5767                 or die_error(404, "Commit not found");
5768         my $ftype = "blob";
5769         if (!defined $hash) {
5770                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5771                         or die_error(404, "Error looking up file");
5772         } else {
5773                 $ftype = git_get_type($hash);
5774                 if ($ftype !~ "blob") {
5775                         die_error(400, "Object is not a blob");
5776                 }
5777         }
5778
5779         my $fd;
5780         if ($format eq 'incremental') {
5781                 # get file contents (as base)
5782                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5783                         or die_error(500, "Open git-cat-file failed");
5784         } elsif ($format eq 'data') {
5785                 # run git-blame --incremental
5786                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5787                         $hash_base, "--", $file_name
5788                         or die_error(500, "Open git-blame --incremental failed");
5789         } else {
5790                 # run git-blame --porcelain
5791                 open $fd, "-|", git_cmd(), "blame", '-p',
5792                         $hash_base, '--', $file_name
5793                         or die_error(500, "Open git-blame --porcelain failed");
5794         }
5795
5796         # incremental blame data returns early
5797         if ($format eq 'data') {
5798                 print $cgi->header(
5799                         -type=>"text/plain", -charset => "utf-8",
5800                         -status=> "200 OK");
5801                 local $| = 1; # output autoflush
5802                 print while <$fd>;
5803                 close $fd
5804                         or print "ERROR $!\n";
5805
5806                 print 'END';
5807                 if (defined $t0 && gitweb_check_feature('timed')) {
5808                         print ' '.
5809                               tv_interval($t0, [ gettimeofday() ]).
5810                               ' '.$number_of_git_cmds;
5811                 }
5812                 print "\n";
5813
5814                 return;
5815         }
5816
5817         # page header
5818         git_header_html();
5819         my $formats_nav =
5820                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5821                         "blob") .
5822                 " | ";
5823         if ($format eq 'incremental') {
5824                 $formats_nav .=
5825                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5826                                 "blame") . " (non-incremental)";
5827         } else {
5828                 $formats_nav .=
5829                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5830                                 "blame") . " (incremental)";
5831         }
5832         $formats_nav .=
5833                 " | " .
5834                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5835                         "history") .
5836                 " | " .
5837                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5838                         "HEAD");
5839         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5840         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5841         git_print_page_path($file_name, $ftype, $hash_base);
5842
5843         # page body
5844         if ($format eq 'incremental') {
5845                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5846                       "This page requires JavaScript to run.\n Use ".
5847                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5848                               'this page').
5849                       " instead.\n".
5850                       "</b></center></div>\n</noscript>\n";
5851
5852                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5853         }
5854
5855         print qq!<div class="page_body">\n!;
5856         print qq!<div id="progress_info">... / ...</div>\n!
5857                 if ($format eq 'incremental');
5858         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5859               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5860               qq!<thead>\n!.
5861               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5862               qq!</thead>\n!.
5863               qq!<tbody>\n!;
5864
5865         my @rev_color = qw(light dark);
5866         my $num_colors = scalar(@rev_color);
5867         my $current_color = 0;
5868
5869         if ($format eq 'incremental') {
5870                 my $color_class = $rev_color[$current_color];
5871
5872                 #contents of a file
5873                 my $linenr = 0;
5874         LINE:
5875                 while (my $line = <$fd>) {
5876                         chomp $line;
5877                         $linenr++;
5878
5879                         print qq!<tr id="l$linenr" class="$color_class">!.
5880                               qq!<td class="sha1"><a href=""> </a></td>!.
5881                               qq!<td class="linenr">!.
5882                               qq!<a class="linenr" href="">$linenr</a></td>!;
5883                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5884                         print qq!</tr>\n!;
5885                 }
5886
5887         } else { # porcelain, i.e. ordinary blame
5888                 my %metainfo = (); # saves information about commits
5889
5890                 # blame data
5891         LINE:
5892                 while (my $line = <$fd>) {
5893                         chomp $line;
5894                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5895                         # no <lines in group> for subsequent lines in group of lines
5896                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5897                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5898                         if (!exists $metainfo{$full_rev}) {
5899                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5900                         }
5901                         my $meta = $metainfo{$full_rev};
5902                         my $data;
5903                         while ($data = <$fd>) {
5904                                 chomp $data;
5905                                 last if ($data =~ s/^\t//); # contents of line
5906                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5907                                         $meta->{$1} = $2 unless exists $meta->{$1};
5908                                 }
5909                                 if ($data =~ /^previous /) {
5910                                         $meta->{'nprevious'}++;
5911                                 }
5912                         }
5913                         my $short_rev = substr($full_rev, 0, 8);
5914                         my $author = $meta->{'author'};
5915                         my %date =
5916                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5917                         my $date = $date{'iso-tz'};
5918                         if ($group_size) {
5919                                 $current_color = ($current_color + 1) % $num_colors;
5920                         }
5921                         my $tr_class = $rev_color[$current_color];
5922                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5923                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5924                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5925                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5926                         if ($group_size) {
5927                                 print "<td class=\"sha1\"";
5928                                 print " title=\"". esc_html($author) . ", $date\"";
5929                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5930                                 print ">";
5931                                 print $cgi->a({-href => href(action=>"commit",
5932                                                              hash=>$full_rev,
5933                                                              file_name=>$file_name)},
5934                                               esc_html($short_rev));
5935                                 if ($group_size >= 2) {
5936                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5937                                         if (@author_initials) {
5938                                                 print "<br />" .
5939                                                       esc_html(join('', @author_initials));
5940                                                 #           or join('.', ...)
5941                                         }
5942                                 }
5943                                 print "</td>\n";
5944                         }
5945                         # 'previous' <sha1 of parent commit> <filename at commit>
5946                         if (exists $meta->{'previous'} &&
5947                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5948                                 $meta->{'parent'} = $1;
5949                                 $meta->{'file_parent'} = unquote($2);
5950                         }
5951                         my $linenr_commit =
5952                                 exists($meta->{'parent'}) ?
5953                                 $meta->{'parent'} : $full_rev;
5954                         my $linenr_filename =
5955                                 exists($meta->{'file_parent'}) ?
5956                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5957                         my $blamed = href(action => 'blame',
5958                                           file_name => $linenr_filename,
5959                                           hash_base => $linenr_commit);
5960                         print "<td class=\"linenr\">";
5961                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5962                                         -class => "linenr" },
5963                                       esc_html($lineno));
5964                         print "</td>";
5965                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5966                         print "</tr>\n";
5967                 } # end while
5968
5969         }
5970
5971         # footer
5972         print "</tbody>\n".
5973               "</table>\n"; # class="blame"
5974         print "</div>\n";   # class="blame_body"
5975         close $fd
5976                 or print "Reading blob failed\n";
5977
5978         git_footer_html();
5979 }
5980
5981 sub git_blame {
5982         git_blame_common();
5983 }
5984
5985 sub git_blame_incremental {
5986         git_blame_common('incremental');
5987 }
5988
5989 sub git_blame_data {
5990         git_blame_common('data');
5991 }
5992
5993 sub git_tags {
5994         my $head = git_get_head_hash($project);
5995         git_header_html();
5996         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5997         git_print_header_div('summary', $project);
5998
5999         my @tagslist = git_get_tags_list();
6000         if (@tagslist) {
6001                 git_tags_body(\@tagslist);
6002         }
6003         git_footer_html();
6004 }
6005
6006 sub git_heads {
6007         my $head = git_get_head_hash($project);
6008         git_header_html();
6009         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6010         git_print_header_div('summary', $project);
6011
6012         my @headslist = git_get_heads_list();
6013         if (@headslist) {
6014                 git_heads_body(\@headslist, $head);
6015         }
6016         git_footer_html();
6017 }
6018
6019 # used both for single remote view and for list of all the remotes
6020 sub git_remotes {
6021         gitweb_check_feature('remote_heads')
6022                 or die_error(403, "Remote heads view is disabled");
6023
6024         my $head = git_get_head_hash($project);
6025         my $remote = $input_params{'hash'};
6026
6027         my $remotedata = git_get_remotes_list($remote);
6028         die_error(500, "Unable to get remote information") unless defined $remotedata;
6029
6030         unless (%$remotedata) {
6031                 die_error(404, defined $remote ?
6032                         "Remote $remote not found" :
6033                         "No remotes found");
6034         }
6035
6036         git_header_html(undef, undef, -action_extra => $remote);
6037         git_print_page_nav('', '',  $head, undef, $head,
6038                 format_ref_views($remote ? '' : 'remotes'));
6039
6040         fill_remote_heads($remotedata);
6041         if (defined $remote) {
6042                 git_print_header_div('remotes', "$remote remote for $project");
6043                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6044         } else {
6045                 git_print_header_div('summary', "$project remotes");
6046                 git_remotes_body($remotedata, undef, $head);
6047         }
6048
6049         git_footer_html();
6050 }
6051
6052 sub git_blob_plain {
6053         my $type = shift;
6054         my $expires;
6055
6056         if (!defined $hash) {
6057                 if (defined $file_name) {
6058                         my $base = $hash_base || git_get_head_hash($project);
6059                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6060                                 or die_error(404, "Cannot find file");
6061                 } else {
6062                         die_error(400, "No file name defined");
6063                 }
6064         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6065                 # blobs defined by non-textual hash id's can be cached
6066                 $expires = "+1d";
6067         }
6068
6069         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6070                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6071
6072         # content-type (can include charset)
6073         $type = blob_contenttype($fd, $file_name, $type);
6074
6075         # "save as" filename, even when no $file_name is given
6076         my $save_as = "$hash";
6077         if (defined $file_name) {
6078                 $save_as = $file_name;
6079         } elsif ($type =~ m/^text\//) {
6080                 $save_as .= '.txt';
6081         }
6082
6083         # With XSS prevention on, blobs of all types except a few known safe
6084         # ones are served with "Content-Disposition: attachment" to make sure
6085         # they don't run in our security domain.  For certain image types,
6086         # blob view writes an <img> tag referring to blob_plain view, and we
6087         # want to be sure not to break that by serving the image as an
6088         # attachment (though Firefox 3 doesn't seem to care).
6089         my $sandbox = $prevent_xss &&
6090                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
6091
6092         print $cgi->header(
6093                 -type => $type,
6094                 -expires => $expires,
6095                 -content_disposition =>
6096                         ($sandbox ? 'attachment' : 'inline')
6097                         . '; filename="' . $save_as . '"');
6098         local $/ = undef;
6099         binmode STDOUT, ':raw';
6100         print <$fd>;
6101         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6102         close $fd;
6103 }
6104
6105 sub git_blob {
6106         my $expires;
6107
6108         if (!defined $hash) {
6109                 if (defined $file_name) {
6110                         my $base = $hash_base || git_get_head_hash($project);
6111                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6112                                 or die_error(404, "Cannot find file");
6113                 } else {
6114                         die_error(400, "No file name defined");
6115                 }
6116         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6117                 # blobs defined by non-textual hash id's can be cached
6118                 $expires = "+1d";
6119         }
6120
6121         my $have_blame = gitweb_check_feature('blame');
6122         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6123                 or die_error(500, "Couldn't cat $file_name, $hash");
6124         my $mimetype = blob_mimetype($fd, $file_name);
6125         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6126         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6127                 close $fd;
6128                 return git_blob_plain($mimetype);
6129         }
6130         # we can have blame only for text/* mimetype
6131         $have_blame &&= ($mimetype =~ m!^text/!);
6132
6133         my $highlight = gitweb_check_feature('highlight');
6134         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6135         $fd = run_highlighter($fd, $highlight, $syntax)
6136                 if $syntax;
6137
6138         git_header_html(undef, $expires);
6139         my $formats_nav = '';
6140         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6141                 if (defined $file_name) {
6142                         if ($have_blame) {
6143                                 $formats_nav .=
6144                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6145                                                 "blame") .
6146                                         " | ";
6147                         }
6148                         $formats_nav .=
6149                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6150                                         "history") .
6151                                 " | " .
6152                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6153                                         "raw") .
6154                                 " | " .
6155                                 $cgi->a({-href => href(action=>"blob",
6156                                                        hash_base=>"HEAD", file_name=>$file_name)},
6157                                         "HEAD");
6158                 } else {
6159                         $formats_nav .=
6160                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6161                                         "raw");
6162                 }
6163                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6164                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6165         } else {
6166                 print "<div class=\"page_nav\">\n" .
6167                       "<br/><br/></div>\n" .
6168                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6169         }
6170         git_print_page_path($file_name, "blob", $hash_base);
6171         print "<div class=\"page_body\">\n";
6172         if ($mimetype =~ m!^image/!) {
6173                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6174                 if ($file_name) {
6175                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6176                 }
6177                 print qq! src="! .
6178                       href(action=>"blob_plain", hash=>$hash,
6179                            hash_base=>$hash_base, file_name=>$file_name) .
6180                       qq!" />\n!;
6181         } else {
6182                 my $nr;
6183                 while (my $line = <$fd>) {
6184                         chomp $line;
6185                         $nr++;
6186                         $line = untabify($line);
6187                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6188                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6189                 }
6190         }
6191         close $fd
6192                 or print "Reading blob failed.\n";
6193         print "</div>";
6194         git_footer_html();
6195 }
6196
6197 sub git_tree {
6198         if (!defined $hash_base) {
6199                 $hash_base = "HEAD";
6200         }
6201         if (!defined $hash) {
6202                 if (defined $file_name) {
6203                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6204                 } else {
6205                         $hash = $hash_base;
6206                 }
6207         }
6208         die_error(404, "No such tree") unless defined($hash);
6209
6210         my $show_sizes = gitweb_check_feature('show-sizes');
6211         my $have_blame = gitweb_check_feature('blame');
6212
6213         my @entries = ();
6214         {
6215                 local $/ = "\0";
6216                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6217                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6218                         or die_error(500, "Open git-ls-tree failed");
6219                 @entries = map { chomp; $_ } <$fd>;
6220                 close $fd
6221                         or die_error(404, "Reading tree failed");
6222         }
6223
6224         my $refs = git_get_references();
6225         my $ref = format_ref_marker($refs, $hash_base);
6226         git_header_html();
6227         my $basedir = '';
6228         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6229                 my @views_nav = ();
6230                 if (defined $file_name) {
6231                         push @views_nav,
6232                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6233                                         "history"),
6234                                 $cgi->a({-href => href(action=>"tree",
6235                                                        hash_base=>"HEAD", file_name=>$file_name)},
6236                                         "HEAD"),
6237                 }
6238                 my $snapshot_links = format_snapshot_links($hash);
6239                 if (defined $snapshot_links) {
6240                         # FIXME: Should be available when we have no hash base as well.
6241                         push @views_nav, $snapshot_links;
6242                 }
6243                 git_print_page_nav('tree','', $hash_base, undef, undef,
6244                                    join(' | ', @views_nav));
6245                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6246         } else {
6247                 undef $hash_base;
6248                 print "<div class=\"page_nav\">\n";
6249                 print "<br/><br/></div>\n";
6250                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6251         }
6252         if (defined $file_name) {
6253                 $basedir = $file_name;
6254                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6255                         $basedir .= '/';
6256                 }
6257                 git_print_page_path($file_name, 'tree', $hash_base);
6258         }
6259         print "<div class=\"page_body\">\n";
6260         print "<table class=\"tree\">\n";
6261         my $alternate = 1;
6262         # '..' (top directory) link if possible
6263         if (defined $hash_base &&
6264             defined $file_name && $file_name =~ m![^/]+$!) {
6265                 if ($alternate) {
6266                         print "<tr class=\"dark\">\n";
6267                 } else {
6268                         print "<tr class=\"light\">\n";
6269                 }
6270                 $alternate ^= 1;
6271
6272                 my $up = $file_name;
6273                 $up =~ s!/?[^/]+$!!;
6274                 undef $up unless $up;
6275                 # based on git_print_tree_entry
6276                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6277                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6278                 print '<td class="list">';
6279                 print $cgi->a({-href => href(action=>"tree",
6280                                              hash_base=>$hash_base,
6281                                              file_name=>$up)},
6282                               "..");
6283                 print "</td>\n";
6284                 print "<td class=\"link\"></td>\n";
6285
6286                 print "</tr>\n";
6287         }
6288         foreach my $line (@entries) {
6289                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6290
6291                 if ($alternate) {
6292                         print "<tr class=\"dark\">\n";
6293                 } else {
6294                         print "<tr class=\"light\">\n";
6295                 }
6296                 $alternate ^= 1;
6297
6298                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6299
6300                 print "</tr>\n";
6301         }
6302         print "</table>\n" .
6303               "</div>";
6304         git_footer_html();
6305 }
6306
6307 sub snapshot_name {
6308         my ($project, $hash) = @_;
6309
6310         # path/to/project.git  -> project
6311         # path/to/project/.git -> project
6312         my $name = to_utf8($project);
6313         $name =~ s,([^/])/*\.git$,$1,;
6314         $name = basename($name);
6315         # sanitize name
6316         $name =~ s/[[:cntrl:]]/?/g;
6317
6318         my $ver = $hash;
6319         if ($hash =~ /^[0-9a-fA-F]+$/) {
6320                 # shorten SHA-1 hash
6321                 my $full_hash = git_get_full_hash($project, $hash);
6322                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6323                         $ver = git_get_short_hash($project, $hash);
6324                 }
6325         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6326                 # tags don't need shortened SHA-1 hash
6327                 $ver = $1;
6328         } else {
6329                 # branches and other need shortened SHA-1 hash
6330                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6331                         $ver = $1;
6332                 }
6333                 $ver .= '-' . git_get_short_hash($project, $hash);
6334         }
6335         # in case of hierarchical branch names
6336         $ver =~ s!/!.!g;
6337
6338         # name = project-version_string
6339         $name = "$name-$ver";
6340
6341         return wantarray ? ($name, $name) : $name;
6342 }
6343
6344 sub git_snapshot {
6345         my $format = $input_params{'snapshot_format'};
6346         if (!@snapshot_fmts) {
6347                 die_error(403, "Snapshots not allowed");
6348         }
6349         # default to first supported snapshot format
6350         $format ||= $snapshot_fmts[0];
6351         if ($format !~ m/^[a-z0-9]+$/) {
6352                 die_error(400, "Invalid snapshot format parameter");
6353         } elsif (!exists($known_snapshot_formats{$format})) {
6354                 die_error(400, "Unknown snapshot format");
6355         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6356                 die_error(403, "Snapshot format not allowed");
6357         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6358                 die_error(403, "Unsupported snapshot format");
6359         }
6360
6361         my $type = git_get_type("$hash^{}");
6362         if (!$type) {
6363                 die_error(404, 'Object does not exist');
6364         }  elsif ($type eq 'blob') {
6365                 die_error(400, 'Object is not a tree-ish');
6366         }
6367
6368         my ($name, $prefix) = snapshot_name($project, $hash);
6369         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6370         my $cmd = quote_command(
6371                 git_cmd(), 'archive',
6372                 "--format=$known_snapshot_formats{$format}{'format'}",
6373                 "--prefix=$prefix/", $hash);
6374         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6375                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6376         }
6377
6378         $filename =~ s/(["\\])/\\$1/g;
6379         print $cgi->header(
6380                 -type => $known_snapshot_formats{$format}{'type'},
6381                 -content_disposition => 'inline; filename="' . $filename . '"',
6382                 -status => '200 OK');
6383
6384         open my $fd, "-|", $cmd
6385                 or die_error(500, "Execute git-archive failed");
6386         binmode STDOUT, ':raw';
6387         print <$fd>;
6388         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6389         close $fd;
6390 }
6391
6392 sub git_log_generic {
6393         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6394
6395         my $head = git_get_head_hash($project);
6396         if (!defined $base) {
6397                 $base = $head;
6398         }
6399         if (!defined $page) {
6400                 $page = 0;
6401         }
6402         my $refs = git_get_references();
6403
6404         my $commit_hash = $base;
6405         if (defined $parent) {
6406                 $commit_hash = "$parent..$base";
6407         }
6408         my @commitlist =
6409                 parse_commits($commit_hash, 101, (100 * $page),
6410                               defined $file_name ? ($file_name, "--full-history") : ());
6411
6412         my $ftype;
6413         if (!defined $file_hash && defined $file_name) {
6414                 # some commits could have deleted file in question,
6415                 # and not have it in tree, but one of them has to have it
6416                 for (my $i = 0; $i < @commitlist; $i++) {
6417                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6418                         last if defined $file_hash;
6419                 }
6420         }
6421         if (defined $file_hash) {
6422                 $ftype = git_get_type($file_hash);
6423         }
6424         if (defined $file_name && !defined $ftype) {
6425                 die_error(500, "Unknown type of object");
6426         }
6427         my %co;
6428         if (defined $file_name) {
6429                 %co = parse_commit($base)
6430                         or die_error(404, "Unknown commit object");
6431         }
6432
6433
6434         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6435         my $next_link = '';
6436         if ($#commitlist >= 100) {
6437                 $next_link =
6438                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6439                                  -accesskey => "n", -title => "Alt-n"}, "next");
6440         }
6441         my $patch_max = gitweb_get_feature('patches');
6442         if ($patch_max && !defined $file_name) {
6443                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6444                         $paging_nav .= " &sdot; " .
6445                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6446                                         "patches");
6447                 }
6448         }
6449
6450         git_header_html();
6451         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6452         if (defined $file_name) {
6453                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6454         } else {
6455                 git_print_header_div('summary', $project)
6456         }
6457         git_print_page_path($file_name, $ftype, $hash_base)
6458                 if (defined $file_name);
6459
6460         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6461                      $file_name, $file_hash, $ftype);
6462
6463         git_footer_html();
6464 }
6465
6466 sub git_log {
6467         git_log_generic('log', \&git_log_body,
6468                         $hash, $hash_parent);
6469 }
6470
6471 sub git_commit {
6472         $hash ||= $hash_base || "HEAD";
6473         my %co = parse_commit($hash)
6474             or die_error(404, "Unknown commit object");
6475
6476         my $parent  = $co{'parent'};
6477         my $parents = $co{'parents'}; # listref
6478
6479         # we need to prepare $formats_nav before any parameter munging
6480         my $formats_nav;
6481         if (!defined $parent) {
6482                 # --root commitdiff
6483                 $formats_nav .= '(initial)';
6484         } elsif (@$parents == 1) {
6485                 # single parent commit
6486                 $formats_nav .=
6487                         '(parent: ' .
6488                         $cgi->a({-href => href(action=>"commit",
6489                                                hash=>$parent)},
6490                                 esc_html(substr($parent, 0, 7))) .
6491                         ')';
6492         } else {
6493                 # merge commit
6494                 $formats_nav .=
6495                         '(merge: ' .
6496                         join(' ', map {
6497                                 $cgi->a({-href => href(action=>"commit",
6498                                                        hash=>$_)},
6499                                         esc_html(substr($_, 0, 7)));
6500                         } @$parents ) .
6501                         ')';
6502         }
6503         if (gitweb_check_feature('patches') && @$parents <= 1) {
6504                 $formats_nav .= " | " .
6505                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6506                                 "patch");
6507         }
6508
6509         if (!defined $parent) {
6510                 $parent = "--root";
6511         }
6512         my @difftree;
6513         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6514                 @diff_opts,
6515                 (@$parents <= 1 ? $parent : '-c'),
6516                 $hash, "--"
6517                 or die_error(500, "Open git-diff-tree failed");
6518         @difftree = map { chomp; $_ } <$fd>;
6519         close $fd or die_error(404, "Reading git-diff-tree failed");
6520
6521         # non-textual hash id's can be cached
6522         my $expires;
6523         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6524                 $expires = "+1d";
6525         }
6526         my $refs = git_get_references();
6527         my $ref = format_ref_marker($refs, $co{'id'});
6528
6529         git_header_html(undef, $expires);
6530         git_print_page_nav('commit', '',
6531                            $hash, $co{'tree'}, $hash,
6532                            $formats_nav);
6533
6534         if (defined $co{'parent'}) {
6535                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6536         } else {
6537                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6538         }
6539         print "<div class=\"title_text\">\n" .
6540               "<table class=\"object_header\">\n";
6541         git_print_authorship_rows(\%co);
6542         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6543         print "<tr>" .
6544               "<td>tree</td>" .
6545               "<td class=\"sha1\">" .
6546               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6547                        class => "list"}, $co{'tree'}) .
6548               "</td>" .
6549               "<td class=\"link\">" .
6550               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6551                       "tree");
6552         my $snapshot_links = format_snapshot_links($hash);
6553         if (defined $snapshot_links) {
6554                 print " | " . $snapshot_links;
6555         }
6556         print "</td>" .
6557               "</tr>\n";
6558
6559         foreach my $par (@$parents) {
6560                 print "<tr>" .
6561                       "<td>parent</td>" .
6562                       "<td class=\"sha1\">" .
6563                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6564                                class => "list"}, $par) .
6565                       "</td>" .
6566                       "<td class=\"link\">" .
6567                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6568                       " | " .
6569                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6570                       "</td>" .
6571                       "</tr>\n";
6572         }
6573         print "</table>".
6574               "</div>\n";
6575
6576         print "<div class=\"page_body\">\n";
6577         git_print_log($co{'comment'});
6578         print "</div>\n";
6579
6580         git_difftree_body(\@difftree, $hash, @$parents);
6581
6582         git_footer_html();
6583 }
6584
6585 sub git_object {
6586         # object is defined by:
6587         # - hash or hash_base alone
6588         # - hash_base and file_name
6589         my $type;
6590
6591         # - hash or hash_base alone
6592         if ($hash || ($hash_base && !defined $file_name)) {
6593                 my $object_id = $hash || $hash_base;
6594
6595                 open my $fd, "-|", quote_command(
6596                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6597                         or die_error(404, "Object does not exist");
6598                 $type = <$fd>;
6599                 chomp $type;
6600                 close $fd
6601                         or die_error(404, "Object does not exist");
6602
6603         # - hash_base and file_name
6604         } elsif ($hash_base && defined $file_name) {
6605                 $file_name =~ s,/+$,,;
6606
6607                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6608                         or die_error(404, "Base object does not exist");
6609
6610                 # here errors should not hapen
6611                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6612                         or die_error(500, "Open git-ls-tree failed");
6613                 my $line = <$fd>;
6614                 close $fd;
6615
6616                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6617                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6618                         die_error(404, "File or directory for given base does not exist");
6619                 }
6620                 $type = $2;
6621                 $hash = $3;
6622         } else {
6623                 die_error(400, "Not enough information to find object");
6624         }
6625
6626         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6627                                           hash=>$hash, hash_base=>$hash_base,
6628                                           file_name=>$file_name),
6629                              -status => '302 Found');
6630 }
6631
6632 sub git_blobdiff {
6633         my $format = shift || 'html';
6634
6635         my $fd;
6636         my @difftree;
6637         my %diffinfo;
6638         my $expires;
6639
6640         # preparing $fd and %diffinfo for git_patchset_body
6641         # new style URI
6642         if (defined $hash_base && defined $hash_parent_base) {
6643                 if (defined $file_name) {
6644                         # read raw output
6645                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6646                                 $hash_parent_base, $hash_base,
6647                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6648                                 or die_error(500, "Open git-diff-tree failed");
6649                         @difftree = map { chomp; $_ } <$fd>;
6650                         close $fd
6651                                 or die_error(404, "Reading git-diff-tree failed");
6652                         @difftree
6653                                 or die_error(404, "Blob diff not found");
6654
6655                 } elsif (defined $hash &&
6656                          $hash =~ /[0-9a-fA-F]{40}/) {
6657                         # try to find filename from $hash
6658
6659                         # read filtered raw output
6660                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6661                                 $hash_parent_base, $hash_base, "--"
6662                                 or die_error(500, "Open git-diff-tree failed");
6663                         @difftree =
6664                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6665                                 # $hash == to_id
6666                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6667                                 map { chomp; $_ } <$fd>;
6668                         close $fd
6669                                 or die_error(404, "Reading git-diff-tree failed");
6670                         @difftree
6671                                 or die_error(404, "Blob diff not found");
6672
6673                 } else {
6674                         die_error(400, "Missing one of the blob diff parameters");
6675                 }
6676
6677                 if (@difftree > 1) {
6678                         die_error(400, "Ambiguous blob diff specification");
6679                 }
6680
6681                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6682                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6683                 $file_name   ||= $diffinfo{'to_file'};
6684
6685                 $hash_parent ||= $diffinfo{'from_id'};
6686                 $hash        ||= $diffinfo{'to_id'};
6687
6688                 # non-textual hash id's can be cached
6689                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6690                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6691                         $expires = '+1d';
6692                 }
6693
6694                 # open patch output
6695                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6696                         '-p', ($format eq 'html' ? "--full-index" : ()),
6697                         $hash_parent_base, $hash_base,
6698                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6699                         or die_error(500, "Open git-diff-tree failed");
6700         }
6701
6702         # old/legacy style URI -- not generated anymore since 1.4.3.
6703         if (!%diffinfo) {
6704                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6705         }
6706
6707         # header
6708         if ($format eq 'html') {
6709                 my $formats_nav =
6710                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6711                                 "raw");
6712                 git_header_html(undef, $expires);
6713                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6714                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6715                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6716                 } else {
6717                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6718                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6719                 }
6720                 if (defined $file_name) {
6721                         git_print_page_path($file_name, "blob", $hash_base);
6722                 } else {
6723                         print "<div class=\"page_path\"></div>\n";
6724                 }
6725
6726         } elsif ($format eq 'plain') {
6727                 print $cgi->header(
6728                         -type => 'text/plain',
6729                         -charset => 'utf-8',
6730                         -expires => $expires,
6731                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6732
6733                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6734
6735         } else {
6736                 die_error(400, "Unknown blobdiff format");
6737         }
6738
6739         # patch
6740         if ($format eq 'html') {
6741                 print "<div class=\"page_body\">\n";
6742
6743                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6744                 close $fd;
6745
6746                 print "</div>\n"; # class="page_body"
6747                 git_footer_html();
6748
6749         } else {
6750                 while (my $line = <$fd>) {
6751                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6752                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6753
6754                         print $line;
6755
6756                         last if $line =~ m!^\+\+\+!;
6757                 }
6758                 local $/ = undef;
6759                 print <$fd>;
6760                 close $fd;
6761         }
6762 }
6763
6764 sub git_blobdiff_plain {
6765         git_blobdiff('plain');
6766 }
6767
6768 sub git_commitdiff {
6769         my %params = @_;
6770         my $format = $params{-format} || 'html';
6771
6772         my ($patch_max) = gitweb_get_feature('patches');
6773         if ($format eq 'patch') {
6774                 die_error(403, "Patch view not allowed") unless $patch_max;
6775         }
6776
6777         $hash ||= $hash_base || "HEAD";
6778         my %co = parse_commit($hash)
6779             or die_error(404, "Unknown commit object");
6780
6781         # choose format for commitdiff for merge
6782         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6783                 $hash_parent = '--cc';
6784         }
6785         # we need to prepare $formats_nav before almost any parameter munging
6786         my $formats_nav;
6787         if ($format eq 'html') {
6788                 $formats_nav =
6789                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6790                                 "raw");
6791                 if ($patch_max && @{$co{'parents'}} <= 1) {
6792                         $formats_nav .= " | " .
6793                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6794                                         "patch");
6795                 }
6796
6797                 if (defined $hash_parent &&
6798                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6799                         # commitdiff with two commits given
6800                         my $hash_parent_short = $hash_parent;
6801                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6802                                 $hash_parent_short = substr($hash_parent, 0, 7);
6803                         }
6804                         $formats_nav .=
6805                                 ' (from';
6806                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6807                                 if ($co{'parents'}[$i] eq $hash_parent) {
6808                                         $formats_nav .= ' parent ' . ($i+1);
6809                                         last;
6810                                 }
6811                         }
6812                         $formats_nav .= ': ' .
6813                                 $cgi->a({-href => href(action=>"commitdiff",
6814                                                        hash=>$hash_parent)},
6815                                         esc_html($hash_parent_short)) .
6816                                 ')';
6817                 } elsif (!$co{'parent'}) {
6818                         # --root commitdiff
6819                         $formats_nav .= ' (initial)';
6820                 } elsif (scalar @{$co{'parents'}} == 1) {
6821                         # single parent commit
6822                         $formats_nav .=
6823                                 ' (parent: ' .
6824                                 $cgi->a({-href => href(action=>"commitdiff",
6825                                                        hash=>$co{'parent'})},
6826                                         esc_html(substr($co{'parent'}, 0, 7))) .
6827                                 ')';
6828                 } else {
6829                         # merge commit
6830                         if ($hash_parent eq '--cc') {
6831                                 $formats_nav .= ' | ' .
6832                                         $cgi->a({-href => href(action=>"commitdiff",
6833                                                                hash=>$hash, hash_parent=>'-c')},
6834                                                 'combined');
6835                         } else { # $hash_parent eq '-c'
6836                                 $formats_nav .= ' | ' .
6837                                         $cgi->a({-href => href(action=>"commitdiff",
6838                                                                hash=>$hash, hash_parent=>'--cc')},
6839                                                 'compact');
6840                         }
6841                         $formats_nav .=
6842                                 ' (merge: ' .
6843                                 join(' ', map {
6844                                         $cgi->a({-href => href(action=>"commitdiff",
6845                                                                hash=>$_)},
6846                                                 esc_html(substr($_, 0, 7)));
6847                                 } @{$co{'parents'}} ) .
6848                                 ')';
6849                 }
6850         }
6851
6852         my $hash_parent_param = $hash_parent;
6853         if (!defined $hash_parent_param) {
6854                 # --cc for multiple parents, --root for parentless
6855                 $hash_parent_param =
6856                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6857         }
6858
6859         # read commitdiff
6860         my $fd;
6861         my @difftree;
6862         if ($format eq 'html') {
6863                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6864                         "--no-commit-id", "--patch-with-raw", "--full-index",
6865                         $hash_parent_param, $hash, "--"
6866                         or die_error(500, "Open git-diff-tree failed");
6867
6868                 while (my $line = <$fd>) {
6869                         chomp $line;
6870                         # empty line ends raw part of diff-tree output
6871                         last unless $line;
6872                         push @difftree, scalar parse_difftree_raw_line($line);
6873                 }
6874
6875         } elsif ($format eq 'plain') {
6876                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6877                         '-p', $hash_parent_param, $hash, "--"
6878                         or die_error(500, "Open git-diff-tree failed");
6879         } elsif ($format eq 'patch') {
6880                 # For commit ranges, we limit the output to the number of
6881                 # patches specified in the 'patches' feature.
6882                 # For single commits, we limit the output to a single patch,
6883                 # diverging from the git-format-patch default.
6884                 my @commit_spec = ();
6885                 if ($hash_parent) {
6886                         if ($patch_max > 0) {
6887                                 push @commit_spec, "-$patch_max";
6888                         }
6889                         push @commit_spec, '-n', "$hash_parent..$hash";
6890                 } else {
6891                         if ($params{-single}) {
6892                                 push @commit_spec, '-1';
6893                         } else {
6894                                 if ($patch_max > 0) {
6895                                         push @commit_spec, "-$patch_max";
6896                                 }
6897                                 push @commit_spec, "-n";
6898                         }
6899                         push @commit_spec, '--root', $hash;
6900                 }
6901                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6902                         '--encoding=utf8', '--stdout', @commit_spec
6903                         or die_error(500, "Open git-format-patch failed");
6904         } else {
6905                 die_error(400, "Unknown commitdiff format");
6906         }
6907
6908         # non-textual hash id's can be cached
6909         my $expires;
6910         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6911                 $expires = "+1d";
6912         }
6913
6914         # write commit message
6915         if ($format eq 'html') {
6916                 my $refs = git_get_references();
6917                 my $ref = format_ref_marker($refs, $co{'id'});
6918
6919                 git_header_html(undef, $expires);
6920                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6921                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6922                 print "<div class=\"title_text\">\n" .
6923                       "<table class=\"object_header\">\n";
6924                 git_print_authorship_rows(\%co);
6925                 print "</table>".
6926                       "</div>\n";
6927                 print "<div class=\"page_body\">\n";
6928                 if (@{$co{'comment'}} > 1) {
6929                         print "<div class=\"log\">\n";
6930                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6931                         print "</div>\n"; # class="log"
6932                 }
6933
6934         } elsif ($format eq 'plain') {
6935                 my $refs = git_get_references("tags");
6936                 my $tagname = git_get_rev_name_tags($hash);
6937                 my $filename = basename($project) . "-$hash.patch";
6938
6939                 print $cgi->header(
6940                         -type => 'text/plain',
6941                         -charset => 'utf-8',
6942                         -expires => $expires,
6943                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6944                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6945                 print "From: " . to_utf8($co{'author'}) . "\n";
6946                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6947                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6948
6949                 print "X-Git-Tag: $tagname\n" if $tagname;
6950                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6951
6952                 foreach my $line (@{$co{'comment'}}) {
6953                         print to_utf8($line) . "\n";
6954                 }
6955                 print "---\n\n";
6956         } elsif ($format eq 'patch') {
6957                 my $filename = basename($project) . "-$hash.patch";
6958
6959                 print $cgi->header(
6960                         -type => 'text/plain',
6961                         -charset => 'utf-8',
6962                         -expires => $expires,
6963                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6964         }
6965
6966         # write patch
6967         if ($format eq 'html') {
6968                 my $use_parents = !defined $hash_parent ||
6969                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6970                 git_difftree_body(\@difftree, $hash,
6971                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6972                 print "<br/>\n";
6973
6974                 git_patchset_body($fd, \@difftree, $hash,
6975                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6976                 close $fd;
6977                 print "</div>\n"; # class="page_body"
6978                 git_footer_html();
6979
6980         } elsif ($format eq 'plain') {
6981                 local $/ = undef;
6982                 print <$fd>;
6983                 close $fd
6984                         or print "Reading git-diff-tree failed\n";
6985         } elsif ($format eq 'patch') {
6986                 local $/ = undef;
6987                 print <$fd>;
6988                 close $fd
6989                         or print "Reading git-format-patch failed\n";
6990         }
6991 }
6992
6993 sub git_commitdiff_plain {
6994         git_commitdiff(-format => 'plain');
6995 }
6996
6997 # format-patch-style patches
6998 sub git_patch {
6999         git_commitdiff(-format => 'patch', -single => 1);
7000 }
7001
7002 sub git_patches {
7003         git_commitdiff(-format => 'patch');
7004 }
7005
7006 sub git_history {
7007         git_log_generic('history', \&git_history_body,
7008                         $hash_base, $hash_parent_base,
7009                         $file_name, $hash);
7010 }
7011
7012 sub git_search {
7013         gitweb_check_feature('search') or die_error(403, "Search is disabled");
7014         if (!defined $searchtext) {
7015                 die_error(400, "Text field is empty");
7016         }
7017         if (!defined $hash) {
7018                 $hash = git_get_head_hash($project);
7019         }
7020         my %co = parse_commit($hash);
7021         if (!%co) {
7022                 die_error(404, "Unknown commit object");
7023         }
7024         if (!defined $page) {
7025                 $page = 0;
7026         }
7027
7028         $searchtype ||= 'commit';
7029         if ($searchtype eq 'pickaxe') {
7030                 # pickaxe may take all resources of your box and run for several minutes
7031                 # with every query - so decide by yourself how public you make this feature
7032                 gitweb_check_feature('pickaxe')
7033                     or die_error(403, "Pickaxe is disabled");
7034         }
7035         if ($searchtype eq 'grep') {
7036                 gitweb_check_feature('grep')[0]
7037                     or die_error(403, "Grep is disabled");
7038         }
7039
7040         git_header_html();
7041
7042         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
7043                 my $greptype;
7044                 if ($searchtype eq 'commit') {
7045                         $greptype = "--grep=";
7046                 } elsif ($searchtype eq 'author') {
7047                         $greptype = "--author=";
7048                 } elsif ($searchtype eq 'committer') {
7049                         $greptype = "--committer=";
7050                 }
7051                 $greptype .= $searchtext;
7052                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7053                                                $greptype, '--regexp-ignore-case',
7054                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7055
7056                 my $paging_nav = '';
7057                 if ($page > 0) {
7058                         $paging_nav .=
7059                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
7060                                                        searchtext=>$searchtext,
7061                                                        searchtype=>$searchtype)},
7062                                         "first");
7063                         $paging_nav .= " &sdot; " .
7064                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
7065                                          -accesskey => "p", -title => "Alt-p"}, "prev");
7066                 } else {
7067                         $paging_nav .= "first";
7068                         $paging_nav .= " &sdot; prev";
7069                 }
7070                 my $next_link = '';
7071                 if ($#commitlist >= 100) {
7072                         $next_link =
7073                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7074                                          -accesskey => "n", -title => "Alt-n"}, "next");
7075                         $paging_nav .= " &sdot; $next_link";
7076                 } else {
7077                         $paging_nav .= " &sdot; next";
7078                 }
7079
7080                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7081                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7082                 if ($page == 0 && !@commitlist) {
7083                         print "<p>No match.</p>\n";
7084                 } else {
7085                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7086                 }
7087         }
7088
7089         if ($searchtype eq 'pickaxe') {
7090                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7091                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7092
7093                 print "<table class=\"pickaxe search\">\n";
7094                 my $alternate = 1;
7095                 local $/ = "\n";
7096                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7097                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7098                         ($search_use_regexp ? '--pickaxe-regex' : ());
7099                 undef %co;
7100                 my @files;
7101                 while (my $line = <$fd>) {
7102                         chomp $line;
7103                         next unless $line;
7104
7105                         my %set = parse_difftree_raw_line($line);
7106                         if (defined $set{'commit'}) {
7107                                 # finish previous commit
7108                                 if (%co) {
7109                                         print "</td>\n" .
7110                                               "<td class=\"link\">" .
7111                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7112                                               " | " .
7113                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7114                                         print "</td>\n" .
7115                                               "</tr>\n";
7116                                 }
7117
7118                                 if ($alternate) {
7119                                         print "<tr class=\"dark\">\n";
7120                                 } else {
7121                                         print "<tr class=\"light\">\n";
7122                                 }
7123                                 $alternate ^= 1;
7124                                 %co = parse_commit($set{'commit'});
7125                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7126                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7127                                       "<td><i>$author</i></td>\n" .
7128                                       "<td>" .
7129                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7130                                               -class => "list subject"},
7131                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7132                         } elsif (defined $set{'to_id'}) {
7133                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7134
7135                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7136                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7137                                               -class => "list"},
7138                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7139                                       "<br/>\n";
7140                         }
7141                 }
7142                 close $fd;
7143
7144                 # finish last commit (warning: repetition!)
7145                 if (%co) {
7146                         print "</td>\n" .
7147                               "<td class=\"link\">" .
7148                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7149                               " | " .
7150                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7151                         print "</td>\n" .
7152                               "</tr>\n";
7153                 }
7154
7155                 print "</table>\n";
7156         }
7157
7158         if ($searchtype eq 'grep') {
7159                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7160                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7161
7162                 print "<table class=\"grep_search\">\n";
7163                 my $alternate = 1;
7164                 my $matches = 0;
7165                 local $/ = "\n";
7166                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7167                         $search_use_regexp ? ('-E', '-i') : '-F',
7168                         $searchtext, $co{'tree'};
7169                 my $lastfile = '';
7170                 while (my $line = <$fd>) {
7171                         chomp $line;
7172                         my ($file, $lno, $ltext, $binary);
7173                         last if ($matches++ > 1000);
7174                         if ($line =~ /^Binary file (.+) matches$/) {
7175                                 $file = $1;
7176                                 $binary = 1;
7177                         } else {
7178                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7179                         }
7180                         if ($file ne $lastfile) {
7181                                 $lastfile and print "</td></tr>\n";
7182                                 if ($alternate++) {
7183                                         print "<tr class=\"dark\">\n";
7184                                 } else {
7185                                         print "<tr class=\"light\">\n";
7186                                 }
7187                                 print "<td class=\"list\">".
7188                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7189                                                                file_name=>"$file"),
7190                                                 -class => "list"}, esc_path($file));
7191                                 print "</td><td>\n";
7192                                 $lastfile = $file;
7193                         }
7194                         if ($binary) {
7195                                 print "<div class=\"binary\">Binary file</div>\n";
7196                         } else {
7197                                 $ltext = untabify($ltext);
7198                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7199                                         $ltext = esc_html($1, -nbsp=>1);
7200                                         $ltext .= '<span class="match">';
7201                                         $ltext .= esc_html($2, -nbsp=>1);
7202                                         $ltext .= '</span>';
7203                                         $ltext .= esc_html($3, -nbsp=>1);
7204                                 } else {
7205                                         $ltext = esc_html($ltext, -nbsp=>1);
7206                                 }
7207                                 print "<div class=\"pre\">" .
7208                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7209                                                                file_name=>"$file").'#l'.$lno,
7210                                                 -class => "linenr"}, sprintf('%4i', $lno))
7211                                         . ' ' .  $ltext . "</div>\n";
7212                         }
7213                 }
7214                 if ($lastfile) {
7215                         print "</td></tr>\n";
7216                         if ($matches > 1000) {
7217                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7218                         }
7219                 } else {
7220                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7221                 }
7222                 close $fd;
7223
7224                 print "</table>\n";
7225         }
7226         git_footer_html();
7227 }
7228
7229 sub git_search_help {
7230         git_header_html();
7231         git_print_page_nav('','', $hash,$hash,$hash);
7232         print <<EOT;
7233 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7234 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7235 the pattern entered is recognized as the POSIX extended
7236 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7237 insensitive).</p>
7238 <dl>
7239 <dt><b>commit</b></dt>
7240 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7241 EOT
7242         my $have_grep = gitweb_check_feature('grep');
7243         if ($have_grep) {
7244                 print <<EOT;
7245 <dt><b>grep</b></dt>
7246 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7247     a different one) are searched for the given pattern. On large trees, this search can take
7248 a while and put some strain on the server, so please use it with some consideration. Note that
7249 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7250 case-sensitive.</dd>
7251 EOT
7252         }
7253         print <<EOT;
7254 <dt><b>author</b></dt>
7255 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7256 <dt><b>committer</b></dt>
7257 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7258 EOT
7259         my $have_pickaxe = gitweb_check_feature('pickaxe');
7260         if ($have_pickaxe) {
7261                 print <<EOT;
7262 <dt><b>pickaxe</b></dt>
7263 <dd>All commits that caused the string to appear or disappear from any file (changes that
7264 added, removed or "modified" the string) will be listed. This search can take a while and
7265 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7266 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7267 EOT
7268         }
7269         print "</dl>\n";
7270         git_footer_html();
7271 }
7272
7273 sub git_shortlog {
7274         git_log_generic('shortlog', \&git_shortlog_body,
7275                         $hash, $hash_parent);
7276 }
7277
7278 ## ......................................................................
7279 ## feeds (RSS, Atom; OPML)
7280
7281 sub git_feed {
7282         my $format = shift || 'atom';
7283         my $have_blame = gitweb_check_feature('blame');
7284
7285         # Atom: http://www.atomenabled.org/developers/syndication/
7286         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7287         if ($format ne 'rss' && $format ne 'atom') {
7288                 die_error(400, "Unknown web feed format");
7289         }
7290
7291         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7292         my $head = $hash || 'HEAD';
7293         my @commitlist = parse_commits($head, 150, 0, $file_name);
7294
7295         my %latest_commit;
7296         my %latest_date;
7297         my $content_type = "application/$format+xml";
7298         if (defined $cgi->http('HTTP_ACCEPT') &&
7299                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7300                 # browser (feed reader) prefers text/xml
7301                 $content_type = 'text/xml';
7302         }
7303         if (defined($commitlist[0])) {
7304                 %latest_commit = %{$commitlist[0]};
7305                 my $latest_epoch = $latest_commit{'committer_epoch'};
7306                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7307                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7308                 if (defined $if_modified) {
7309                         my $since;
7310                         if (eval { require HTTP::Date; 1; }) {
7311                                 $since = HTTP::Date::str2time($if_modified);
7312                         } elsif (eval { require Time::ParseDate; 1; }) {
7313                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7314                         }
7315                         if (defined $since && $latest_epoch <= $since) {
7316                                 print $cgi->header(
7317                                         -type => $content_type,
7318                                         -charset => 'utf-8',
7319                                         -last_modified => $latest_date{'rfc2822'},
7320                                         -status => '304 Not Modified');
7321                                 return;
7322                         }
7323                 }
7324                 print $cgi->header(
7325                         -type => $content_type,
7326                         -charset => 'utf-8',
7327                         -last_modified => $latest_date{'rfc2822'});
7328         } else {
7329                 print $cgi->header(
7330                         -type => $content_type,
7331                         -charset => 'utf-8');
7332         }
7333
7334         # Optimization: skip generating the body if client asks only
7335         # for Last-Modified date.
7336         return if ($cgi->request_method() eq 'HEAD');
7337
7338         # header variables
7339         my $title = "$site_name - $project/$action";
7340         my $feed_type = 'log';
7341         if (defined $hash) {
7342                 $title .= " - '$hash'";
7343                 $feed_type = 'branch log';
7344                 if (defined $file_name) {
7345                         $title .= " :: $file_name";
7346                         $feed_type = 'history';
7347                 }
7348         } elsif (defined $file_name) {
7349                 $title .= " - $file_name";
7350                 $feed_type = 'history';
7351         }
7352         $title .= " $feed_type";
7353         my $descr = git_get_project_description($project);
7354         if (defined $descr) {
7355                 $descr = esc_html($descr);
7356         } else {
7357                 $descr = "$project " .
7358                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7359                          " feed";
7360         }
7361         my $owner = git_get_project_owner($project);
7362         $owner = esc_html($owner);
7363
7364         #header
7365         my $alt_url;
7366         if (defined $file_name) {
7367                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7368         } elsif (defined $hash) {
7369                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7370         } else {
7371                 $alt_url = href(-full=>1, action=>"summary");
7372         }
7373         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7374         if ($format eq 'rss') {
7375                 print <<XML;
7376 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7377 <channel>
7378 XML
7379                 print "<title>$title</title>\n" .
7380                       "<link>$alt_url</link>\n" .
7381                       "<description>$descr</description>\n" .
7382                       "<language>en</language>\n" .
7383                       # project owner is responsible for 'editorial' content
7384                       "<managingEditor>$owner</managingEditor>\n";
7385                 if (defined $logo || defined $favicon) {
7386                         # prefer the logo to the favicon, since RSS
7387                         # doesn't allow both
7388                         my $img = esc_url($logo || $favicon);
7389                         print "<image>\n" .
7390                               "<url>$img</url>\n" .
7391                               "<title>$title</title>\n" .
7392                               "<link>$alt_url</link>\n" .
7393                               "</image>\n";
7394                 }
7395                 if (%latest_date) {
7396                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7397                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7398                 }
7399                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7400         } elsif ($format eq 'atom') {
7401                 print <<XML;
7402 <feed xmlns="http://www.w3.org/2005/Atom">
7403 XML
7404                 print "<title>$title</title>\n" .
7405                       "<subtitle>$descr</subtitle>\n" .
7406                       '<link rel="alternate" type="text/html" href="' .
7407                       $alt_url . '" />' . "\n" .
7408                       '<link rel="self" type="' . $content_type . '" href="' .
7409                       $cgi->self_url() . '" />' . "\n" .
7410                       "<id>" . href(-full=>1) . "</id>\n" .
7411                       # use project owner for feed author
7412                       "<author><name>$owner</name></author>\n";
7413                 if (defined $favicon) {
7414                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7415                 }
7416                 if (defined $logo) {
7417                         # not twice as wide as tall: 72 x 27 pixels
7418                         print "<logo>" . esc_url($logo) . "</logo>\n";
7419                 }
7420                 if (! %latest_date) {
7421                         # dummy date to keep the feed valid until commits trickle in:
7422                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7423                 } else {
7424                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7425                 }
7426                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7427         }
7428
7429         # contents
7430         for (my $i = 0; $i <= $#commitlist; $i++) {
7431                 my %co = %{$commitlist[$i]};
7432                 my $commit = $co{'id'};
7433                 # we read 150, we always show 30 and the ones more recent than 48 hours
7434                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7435                         last;
7436                 }
7437                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7438
7439                 # get list of changed files
7440                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7441                         $co{'parent'} || "--root",
7442                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7443                         or next;
7444                 my @difftree = map { chomp; $_ } <$fd>;
7445                 close $fd
7446                         or next;
7447
7448                 # print element (entry, item)
7449                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7450                 if ($format eq 'rss') {
7451                         print "<item>\n" .
7452                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7453                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7454                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7455                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7456                               "<link>$co_url</link>\n" .
7457                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7458                               "<content:encoded>" .
7459                               "<![CDATA[\n";
7460                 } elsif ($format eq 'atom') {
7461                         print "<entry>\n" .
7462                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7463                               "<updated>$cd{'iso-8601'}</updated>\n" .
7464                               "<author>\n" .
7465                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7466                         if ($co{'author_email'}) {
7467                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7468                         }
7469                         print "</author>\n" .
7470                               # use committer for contributor
7471                               "<contributor>\n" .
7472                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7473                         if ($co{'committer_email'}) {
7474                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7475                         }
7476                         print "</contributor>\n" .
7477                               "<published>$cd{'iso-8601'}</published>\n" .
7478                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7479                               "<id>$co_url</id>\n" .
7480                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7481                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7482                 }
7483                 my $comment = $co{'comment'};
7484                 print "<pre>\n";
7485                 foreach my $line (@$comment) {
7486                         $line = esc_html($line);
7487                         print "$line\n";
7488                 }
7489                 print "</pre><ul>\n";
7490                 foreach my $difftree_line (@difftree) {
7491                         my %difftree = parse_difftree_raw_line($difftree_line);
7492                         next if !$difftree{'from_id'};
7493
7494                         my $file = $difftree{'file'} || $difftree{'to_file'};
7495
7496                         print "<li>" .
7497                               "[" .
7498                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7499                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7500                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7501                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7502                                       -title => "diff"}, 'D');
7503                         if ($have_blame) {
7504                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7505                                                              file_name=>$file, hash_base=>$commit),
7506                                               -title => "blame"}, 'B');
7507                         }
7508                         # if this is not a feed of a file history
7509                         if (!defined $file_name || $file_name ne $file) {
7510                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7511                                                              file_name=>$file, hash=>$commit),
7512                                               -title => "history"}, 'H');
7513                         }
7514                         $file = esc_path($file);
7515                         print "] ".
7516                               "$file</li>\n";
7517                 }
7518                 if ($format eq 'rss') {
7519                         print "</ul>]]>\n" .
7520                               "</content:encoded>\n" .
7521                               "</item>\n";
7522                 } elsif ($format eq 'atom') {
7523                         print "</ul>\n</div>\n" .
7524                               "</content>\n" .
7525                               "</entry>\n";
7526                 }
7527         }
7528
7529         # end of feed
7530         if ($format eq 'rss') {
7531                 print "</channel>\n</rss>\n";
7532         } elsif ($format eq 'atom') {
7533                 print "</feed>\n";
7534         }
7535 }
7536
7537 sub git_rss {
7538         git_feed('rss');
7539 }
7540
7541 sub git_atom {
7542         git_feed('atom');
7543 }
7544
7545 sub git_opml {
7546         my @list = git_get_projects_list();
7547         if (!@list) {
7548                 die_error(404, "No projects found");
7549         }
7550
7551         print $cgi->header(
7552                 -type => 'text/xml',
7553                 -charset => 'utf-8',
7554                 -content_disposition => 'inline; filename="opml.xml"');
7555
7556         print <<XML;
7557 <?xml version="1.0" encoding="utf-8"?>
7558 <opml version="1.0">
7559 <head>
7560   <title>$site_name OPML Export</title>
7561 </head>
7562 <body>
7563 <outline text="git RSS feeds">
7564 XML
7565
7566         foreach my $pr (@list) {
7567                 my %proj = %$pr;
7568                 my $head = git_get_head_hash($proj{'path'});
7569                 if (!defined $head) {
7570                         next;
7571                 }
7572                 $git_dir = "$projectroot/$proj{'path'}";
7573                 my %co = parse_commit($head);
7574                 if (!%co) {
7575                         next;
7576                 }
7577
7578                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7579                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7580                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7581                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7582         }
7583         print <<XML;
7584 </outline>
7585 </body>
7586 </opml>
7587 XML
7588 }