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, %opts) = @_;
4097         my $strtime = $date->{'rfc2822'};
4098
4099         return $strtime unless $opts{'-localtime'};
4100
4101         my $localtime_format = '(%02d:%02d %s)';
4102         if ($date->{'hour_local'} < 6) {
4103                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4104         }
4105         $strtime .= ' ' .
4106                     sprintf($localtime_format,
4107                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4108
4109         return $strtime;
4110 }
4111
4112 # Outputs the author name and date in long form
4113 sub git_print_authorship {
4114         my $co = shift;
4115         my %opts = @_;
4116         my $tag = $opts{-tag} || 'div';
4117         my $author = $co->{'author_name'};
4118
4119         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4120         print "<$tag class=\"author_date\">" .
4121               format_search_author($author, "author", esc_html($author)) .
4122               " [".format_timestamp_html(\%ad, %opts)."]".
4123               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4124               "</$tag>\n";
4125 }
4126
4127 # Outputs table rows containing the full author or committer information,
4128 # in the format expected for 'commit' view (& similar).
4129 # Parameters are a commit hash reference, followed by the list of people
4130 # to output information for. If the list is empty it defaults to both
4131 # author and committer.
4132 sub git_print_authorship_rows {
4133         my $co = shift;
4134         # too bad we can't use @people = @_ || ('author', 'committer')
4135         my @people = @_;
4136         @people = ('author', 'committer') unless @people;
4137         foreach my $who (@people) {
4138                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4139                 print "<tr><td>$who</td><td>" .
4140                       format_search_author($co->{"${who}_name"}, $who,
4141                                            esc_html($co->{"${who}_name"})) . " " .
4142                       format_search_author($co->{"${who}_email"}, $who,
4143                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4144                       "</td><td rowspan=\"2\">" .
4145                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4146                       "</td></tr>\n" .
4147                       "<tr>" .
4148                       "<td></td><td>" .
4149                       format_timestamp_html(\%wd, -localtime=>1) .
4150                       "</td>" .
4151                       "</tr>\n";
4152         }
4153 }
4154
4155 sub git_print_page_path {
4156         my $name = shift;
4157         my $type = shift;
4158         my $hb = shift;
4159
4160
4161         print "<div class=\"page_path\">";
4162         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4163                       -title => 'tree root'}, to_utf8("[$project]"));
4164         print " / ";
4165         if (defined $name) {
4166                 my @dirname = split '/', $name;
4167                 my $basename = pop @dirname;
4168                 my $fullname = '';
4169
4170                 foreach my $dir (@dirname) {
4171                         $fullname .= ($fullname ? '/' : '') . $dir;
4172                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4173                                                      hash_base=>$hb),
4174                                       -title => $fullname}, esc_path($dir));
4175                         print " / ";
4176                 }
4177                 if (defined $type && $type eq 'blob') {
4178                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4179                                                      hash_base=>$hb),
4180                                       -title => $name}, esc_path($basename));
4181                 } elsif (defined $type && $type eq 'tree') {
4182                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4183                                                      hash_base=>$hb),
4184                                       -title => $name}, esc_path($basename));
4185                         print " / ";
4186                 } else {
4187                         print esc_path($basename);
4188                 }
4189         }
4190         print "<br/></div>\n";
4191 }
4192
4193 sub git_print_log {
4194         my $log = shift;
4195         my %opts = @_;
4196
4197         if ($opts{'-remove_title'}) {
4198                 # remove title, i.e. first line of log
4199                 shift @$log;
4200         }
4201         # remove leading empty lines
4202         while (defined $log->[0] && $log->[0] eq "") {
4203                 shift @$log;
4204         }
4205
4206         # print log
4207         my $signoff = 0;
4208         my $empty = 0;
4209         foreach my $line (@$log) {
4210                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4211                         $signoff = 1;
4212                         $empty = 0;
4213                         if (! $opts{'-remove_signoff'}) {
4214                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4215                                 next;
4216                         } else {
4217                                 # remove signoff lines
4218                                 next;
4219                         }
4220                 } else {
4221                         $signoff = 0;
4222                 }
4223
4224                 # print only one empty line
4225                 # do not print empty line after signoff
4226                 if ($line eq "") {
4227                         next if ($empty || $signoff);
4228                         $empty = 1;
4229                 } else {
4230                         $empty = 0;
4231                 }
4232
4233                 print format_log_line_html($line) . "<br/>\n";
4234         }
4235
4236         if ($opts{'-final_empty_line'}) {
4237                 # end with single empty line
4238                 print "<br/>\n" unless $empty;
4239         }
4240 }
4241
4242 # return link target (what link points to)
4243 sub git_get_link_target {
4244         my $hash = shift;
4245         my $link_target;
4246
4247         # read link
4248         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4249                 or return;
4250         {
4251                 local $/ = undef;
4252                 $link_target = <$fd>;
4253         }
4254         close $fd
4255                 or return;
4256
4257         return $link_target;
4258 }
4259
4260 # given link target, and the directory (basedir) the link is in,
4261 # return target of link relative to top directory (top tree);
4262 # return undef if it is not possible (including absolute links).
4263 sub normalize_link_target {
4264         my ($link_target, $basedir) = @_;
4265
4266         # absolute symlinks (beginning with '/') cannot be normalized
4267         return if (substr($link_target, 0, 1) eq '/');
4268
4269         # normalize link target to path from top (root) tree (dir)
4270         my $path;
4271         if ($basedir) {
4272                 $path = $basedir . '/' . $link_target;
4273         } else {
4274                 # we are in top (root) tree (dir)
4275                 $path = $link_target;
4276         }
4277
4278         # remove //, /./, and /../
4279         my @path_parts;
4280         foreach my $part (split('/', $path)) {
4281                 # discard '.' and ''
4282                 next if (!$part || $part eq '.');
4283                 # handle '..'
4284                 if ($part eq '..') {
4285                         if (@path_parts) {
4286                                 pop @path_parts;
4287                         } else {
4288                                 # link leads outside repository (outside top dir)
4289                                 return;
4290                         }
4291                 } else {
4292                         push @path_parts, $part;
4293                 }
4294         }
4295         $path = join('/', @path_parts);
4296
4297         return $path;
4298 }
4299
4300 # print tree entry (row of git_tree), but without encompassing <tr> element
4301 sub git_print_tree_entry {
4302         my ($t, $basedir, $hash_base, $have_blame) = @_;
4303
4304         my %base_key = ();
4305         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4306
4307         # The format of a table row is: mode list link.  Where mode is
4308         # the mode of the entry, list is the name of the entry, an href,
4309         # and link is the action links of the entry.
4310
4311         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4312         if (exists $t->{'size'}) {
4313                 print "<td class=\"size\">$t->{'size'}</td>\n";
4314         }
4315         if ($t->{'type'} eq "blob") {
4316                 print "<td class=\"list\">" .
4317                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4318                                                file_name=>"$basedir$t->{'name'}", %base_key),
4319                                 -class => "list"}, esc_path($t->{'name'}));
4320                 if (S_ISLNK(oct $t->{'mode'})) {
4321                         my $link_target = git_get_link_target($t->{'hash'});
4322                         if ($link_target) {
4323                                 my $norm_target = normalize_link_target($link_target, $basedir);
4324                                 if (defined $norm_target) {
4325                                         print " -> " .
4326                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4327                                                                      file_name=>$norm_target),
4328                                                        -title => $norm_target}, esc_path($link_target));
4329                                 } else {
4330                                         print " -> " . esc_path($link_target);
4331                                 }
4332                         }
4333                 }
4334                 print "</td>\n";
4335                 print "<td class=\"link\">";
4336                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4337                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4338                               "blob");
4339                 if ($have_blame) {
4340                         print " | " .
4341                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4342                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4343                                       "blame");
4344                 }
4345                 if (defined $hash_base) {
4346                         print " | " .
4347                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4348                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4349                                       "history");
4350                 }
4351                 print " | " .
4352                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4353                                                file_name=>"$basedir$t->{'name'}")},
4354                                 "raw");
4355                 print "</td>\n";
4356
4357         } elsif ($t->{'type'} eq "tree") {
4358                 print "<td class=\"list\">";
4359                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4360                                              file_name=>"$basedir$t->{'name'}",
4361                                              %base_key)},
4362                               esc_path($t->{'name'}));
4363                 print "</td>\n";
4364                 print "<td class=\"link\">";
4365                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4366                                              file_name=>"$basedir$t->{'name'}",
4367                                              %base_key)},
4368                               "tree");
4369                 if (defined $hash_base) {
4370                         print " | " .
4371                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4372                                                      file_name=>"$basedir$t->{'name'}")},
4373                                       "history");
4374                 }
4375                 print "</td>\n";
4376         } else {
4377                 # unknown object: we can only present history for it
4378                 # (this includes 'commit' object, i.e. submodule support)
4379                 print "<td class=\"list\">" .
4380                       esc_path($t->{'name'}) .
4381                       "</td>\n";
4382                 print "<td class=\"link\">";
4383                 if (defined $hash_base) {
4384                         print $cgi->a({-href => href(action=>"history",
4385                                                      hash_base=>$hash_base,
4386                                                      file_name=>"$basedir$t->{'name'}")},
4387                                       "history");
4388                 }
4389                 print "</td>\n";
4390         }
4391 }
4392
4393 ## ......................................................................
4394 ## functions printing large fragments of HTML
4395
4396 # get pre-image filenames for merge (combined) diff
4397 sub fill_from_file_info {
4398         my ($diff, @parents) = @_;
4399
4400         $diff->{'from_file'} = [ ];
4401         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4402         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4403                 if ($diff->{'status'}[$i] eq 'R' ||
4404                     $diff->{'status'}[$i] eq 'C') {
4405                         $diff->{'from_file'}[$i] =
4406                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4407                 }
4408         }
4409
4410         return $diff;
4411 }
4412
4413 # is current raw difftree line of file deletion
4414 sub is_deleted {
4415         my $diffinfo = shift;
4416
4417         return $diffinfo->{'to_id'} eq ('0' x 40);
4418 }
4419
4420 # does patch correspond to [previous] difftree raw line
4421 # $diffinfo  - hashref of parsed raw diff format
4422 # $patchinfo - hashref of parsed patch diff format
4423 #              (the same keys as in $diffinfo)
4424 sub is_patch_split {
4425         my ($diffinfo, $patchinfo) = @_;
4426
4427         return defined $diffinfo && defined $patchinfo
4428                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4429 }
4430
4431
4432 sub git_difftree_body {
4433         my ($difftree, $hash, @parents) = @_;
4434         my ($parent) = $parents[0];
4435         my $have_blame = gitweb_check_feature('blame');
4436         print "<div class=\"list_head\">\n";
4437         if ($#{$difftree} > 10) {
4438                 print(($#{$difftree} + 1) . " files changed:\n");
4439         }
4440         print "</div>\n";
4441
4442         print "<table class=\"" .
4443               (@parents > 1 ? "combined " : "") .
4444               "diff_tree\">\n";
4445
4446         # header only for combined diff in 'commitdiff' view
4447         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4448         if ($has_header) {
4449                 # table header
4450                 print "<thead><tr>\n" .
4451                        "<th></th><th></th>\n"; # filename, patchN link
4452                 for (my $i = 0; $i < @parents; $i++) {
4453                         my $par = $parents[$i];
4454                         print "<th>" .
4455                               $cgi->a({-href => href(action=>"commitdiff",
4456                                                      hash=>$hash, hash_parent=>$par),
4457                                        -title => 'commitdiff to parent number ' .
4458                                                   ($i+1) . ': ' . substr($par,0,7)},
4459                                       $i+1) .
4460                               "&nbsp;</th>\n";
4461                 }
4462                 print "</tr></thead>\n<tbody>\n";
4463         }
4464
4465         my $alternate = 1;
4466         my $patchno = 0;
4467         foreach my $line (@{$difftree}) {
4468                 my $diff = parsed_difftree_line($line);
4469
4470                 if ($alternate) {
4471                         print "<tr class=\"dark\">\n";
4472                 } else {
4473                         print "<tr class=\"light\">\n";
4474                 }
4475                 $alternate ^= 1;
4476
4477                 if (exists $diff->{'nparents'}) { # combined diff
4478
4479                         fill_from_file_info($diff, @parents)
4480                                 unless exists $diff->{'from_file'};
4481
4482                         if (!is_deleted($diff)) {
4483                                 # file exists in the result (child) commit
4484                                 print "<td>" .
4485                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4486                                                              file_name=>$diff->{'to_file'},
4487                                                              hash_base=>$hash),
4488                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4489                                       "</td>\n";
4490                         } else {
4491                                 print "<td>" .
4492                                       esc_path($diff->{'to_file'}) .
4493                                       "</td>\n";
4494                         }
4495
4496                         if ($action eq 'commitdiff') {
4497                                 # link to patch
4498                                 $patchno++;
4499                                 print "<td class=\"link\">" .
4500                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4501                                               "patch") .
4502                                       " | " .
4503                                       "</td>\n";
4504                         }
4505
4506                         my $has_history = 0;
4507                         my $not_deleted = 0;
4508                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4509                                 my $hash_parent = $parents[$i];
4510                                 my $from_hash = $diff->{'from_id'}[$i];
4511                                 my $from_path = $diff->{'from_file'}[$i];
4512                                 my $status = $diff->{'status'}[$i];
4513
4514                                 $has_history ||= ($status ne 'A');
4515                                 $not_deleted ||= ($status ne 'D');
4516
4517                                 if ($status eq 'A') {
4518                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4519                                 } elsif ($status eq 'D') {
4520                                         print "<td class=\"link\">" .
4521                                               $cgi->a({-href => href(action=>"blob",
4522                                                                      hash_base=>$hash,
4523                                                                      hash=>$from_hash,
4524                                                                      file_name=>$from_path)},
4525                                                       "blob" . ($i+1)) .
4526                                               " | </td>\n";
4527                                 } else {
4528                                         if ($diff->{'to_id'} eq $from_hash) {
4529                                                 print "<td class=\"link nochange\">";
4530                                         } else {
4531                                                 print "<td class=\"link\">";
4532                                         }
4533                                         print $cgi->a({-href => href(action=>"blobdiff",
4534                                                                      hash=>$diff->{'to_id'},
4535                                                                      hash_parent=>$from_hash,
4536                                                                      hash_base=>$hash,
4537                                                                      hash_parent_base=>$hash_parent,
4538                                                                      file_name=>$diff->{'to_file'},
4539                                                                      file_parent=>$from_path)},
4540                                                       "diff" . ($i+1)) .
4541                                               " | </td>\n";
4542                                 }
4543                         }
4544
4545                         print "<td class=\"link\">";
4546                         if ($not_deleted) {
4547                                 print $cgi->a({-href => href(action=>"blob",
4548                                                              hash=>$diff->{'to_id'},
4549                                                              file_name=>$diff->{'to_file'},
4550                                                              hash_base=>$hash)},
4551                                               "blob");
4552                                 print " | " if ($has_history);
4553                         }
4554                         if ($has_history) {
4555                                 print $cgi->a({-href => href(action=>"history",
4556                                                              file_name=>$diff->{'to_file'},
4557                                                              hash_base=>$hash)},
4558                                               "history");
4559                         }
4560                         print "</td>\n";
4561
4562                         print "</tr>\n";
4563                         next; # instead of 'else' clause, to avoid extra indent
4564                 }
4565                 # else ordinary diff
4566
4567                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4568                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4569                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4570                         $to_mode_oct = oct $diff->{'to_mode'};
4571                         if (S_ISREG($to_mode_oct)) { # only for regular file
4572                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4573                         }
4574                         $to_file_type = file_type($diff->{'to_mode'});
4575                 }
4576                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4577                         $from_mode_oct = oct $diff->{'from_mode'};
4578                         if (S_ISREG($from_mode_oct)) { # only for regular file
4579                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4580                         }
4581                         $from_file_type = file_type($diff->{'from_mode'});
4582                 }
4583
4584                 if ($diff->{'status'} eq "A") { # created
4585                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4586                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4587                         $mode_chng   .= "]</span>";
4588                         print "<td>";
4589                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4590                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4591                                       -class => "list"}, esc_path($diff->{'file'}));
4592                         print "</td>\n";
4593                         print "<td>$mode_chng</td>\n";
4594                         print "<td class=\"link\">";
4595                         if ($action eq 'commitdiff') {
4596                                 # link to patch
4597                                 $patchno++;
4598                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4599                                               "patch") .
4600                                       " | ";
4601                         }
4602                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4603                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4604                                       "blob");
4605                         print "</td>\n";
4606
4607                 } elsif ($diff->{'status'} eq "D") { # deleted
4608                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4609                         print "<td>";
4610                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4611                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4612                                        -class => "list"}, esc_path($diff->{'file'}));
4613                         print "</td>\n";
4614                         print "<td>$mode_chng</td>\n";
4615                         print "<td class=\"link\">";
4616                         if ($action eq 'commitdiff') {
4617                                 # link to patch
4618                                 $patchno++;
4619                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4620                                               "patch") .
4621                                       " | ";
4622                         }
4623                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4624                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4625                                       "blob") . " | ";
4626                         if ($have_blame) {
4627                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4628                                                              file_name=>$diff->{'file'})},
4629                                               "blame") . " | ";
4630                         }
4631                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4632                                                      file_name=>$diff->{'file'})},
4633                                       "history");
4634                         print "</td>\n";
4635
4636                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4637                         my $mode_chnge = "";
4638                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4639                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4640                                 if ($from_file_type ne $to_file_type) {
4641                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4642                                 }
4643                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4644                                         if ($from_mode_str && $to_mode_str) {
4645                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4646                                         } elsif ($to_mode_str) {
4647                                                 $mode_chnge .= " mode: $to_mode_str";
4648                                         }
4649                                 }
4650                                 $mode_chnge .= "]</span>\n";
4651                         }
4652                         print "<td>";
4653                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4654                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4655                                       -class => "list"}, esc_path($diff->{'file'}));
4656                         print "</td>\n";
4657                         print "<td>$mode_chnge</td>\n";
4658                         print "<td class=\"link\">";
4659                         if ($action eq 'commitdiff') {
4660                                 # link to patch
4661                                 $patchno++;
4662                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4663                                               "patch") .
4664                                       " | ";
4665                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4666                                 # "commit" view and modified file (not onlu mode changed)
4667                                 print $cgi->a({-href => href(action=>"blobdiff",
4668                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4669                                                              hash_base=>$hash, hash_parent_base=>$parent,
4670                                                              file_name=>$diff->{'file'})},
4671                                               "diff") .
4672                                       " | ";
4673                         }
4674                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4675                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4676                                        "blob") . " | ";
4677                         if ($have_blame) {
4678                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4679                                                              file_name=>$diff->{'file'})},
4680                                               "blame") . " | ";
4681                         }
4682                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4683                                                      file_name=>$diff->{'file'})},
4684                                       "history");
4685                         print "</td>\n";
4686
4687                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4688                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4689                         my $nstatus = $status_name{$diff->{'status'}};
4690                         my $mode_chng = "";
4691                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4692                                 # mode also for directories, so we cannot use $to_mode_str
4693                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4694                         }
4695                         print "<td>" .
4696                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4697                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4698                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4699                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4700                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4701                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4702                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4703                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4704                               "<td class=\"link\">";
4705                         if ($action eq 'commitdiff') {
4706                                 # link to patch
4707                                 $patchno++;
4708                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4709                                               "patch") .
4710                                       " | ";
4711                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4712                                 # "commit" view and modified file (not only pure rename or copy)
4713                                 print $cgi->a({-href => href(action=>"blobdiff",
4714                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4715                                                              hash_base=>$hash, hash_parent_base=>$parent,
4716                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4717                                               "diff") .
4718                                       " | ";
4719                         }
4720                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4721                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4722                                       "blob") . " | ";
4723                         if ($have_blame) {
4724                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4725                                                              file_name=>$diff->{'to_file'})},
4726                                               "blame") . " | ";
4727                         }
4728                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4729                                                     file_name=>$diff->{'to_file'})},
4730                                       "history");
4731                         print "</td>\n";
4732
4733                 } # we should not encounter Unmerged (U) or Unknown (X) status
4734                 print "</tr>\n";
4735         }
4736         print "</tbody>" if $has_header;
4737         print "</table>\n";
4738 }
4739
4740 sub git_patchset_body {
4741         my ($fd, $difftree, $hash, @hash_parents) = @_;
4742         my ($hash_parent) = $hash_parents[0];
4743
4744         my $is_combined = (@hash_parents > 1);
4745         my $patch_idx = 0;
4746         my $patch_number = 0;
4747         my $patch_line;
4748         my $diffinfo;
4749         my $to_name;
4750         my (%from, %to);
4751
4752         print "<div class=\"patchset\">\n";
4753
4754         # skip to first patch
4755         while ($patch_line = <$fd>) {
4756                 chomp $patch_line;
4757
4758                 last if ($patch_line =~ m/^diff /);
4759         }
4760
4761  PATCH:
4762         while ($patch_line) {
4763
4764                 # parse "git diff" header line
4765                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4766                         # $1 is from_name, which we do not use
4767                         $to_name = unquote($2);
4768                         $to_name =~ s!^b/!!;
4769                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4770                         # $1 is 'cc' or 'combined', which we do not use
4771                         $to_name = unquote($2);
4772                 } else {
4773                         $to_name = undef;
4774                 }
4775
4776                 # check if current patch belong to current raw line
4777                 # and parse raw git-diff line if needed
4778                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4779                         # this is continuation of a split patch
4780                         print "<div class=\"patch cont\">\n";
4781                 } else {
4782                         # advance raw git-diff output if needed
4783                         $patch_idx++ if defined $diffinfo;
4784
4785                         # read and prepare patch information
4786                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4787
4788                         # compact combined diff output can have some patches skipped
4789                         # find which patch (using pathname of result) we are at now;
4790                         if ($is_combined) {
4791                                 while ($to_name ne $diffinfo->{'to_file'}) {
4792                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4793                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4794                                               "</div>\n";  # class="patch"
4795
4796                                         $patch_idx++;
4797                                         $patch_number++;
4798
4799                                         last if $patch_idx > $#$difftree;
4800                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4801                                 }
4802                         }
4803
4804                         # modifies %from, %to hashes
4805                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4806
4807                         # this is first patch for raw difftree line with $patch_idx index
4808                         # we index @$difftree array from 0, but number patches from 1
4809                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4810                 }
4811
4812                 # git diff header
4813                 #assert($patch_line =~ m/^diff /) if DEBUG;
4814                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4815                 $patch_number++;
4816                 # print "git diff" header
4817                 print format_git_diff_header_line($patch_line, $diffinfo,
4818                                                   \%from, \%to);
4819
4820                 # print extended diff header
4821                 print "<div class=\"diff extended_header\">\n";
4822         EXTENDED_HEADER:
4823                 while ($patch_line = <$fd>) {
4824                         chomp $patch_line;
4825
4826                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4827
4828                         print format_extended_diff_header_line($patch_line, $diffinfo,
4829                                                                \%from, \%to);
4830                 }
4831                 print "</div>\n"; # class="diff extended_header"
4832
4833                 # from-file/to-file diff header
4834                 if (! $patch_line) {
4835                         print "</div>\n"; # class="patch"
4836                         last PATCH;
4837                 }
4838                 next PATCH if ($patch_line =~ m/^diff /);
4839                 #assert($patch_line =~ m/^---/) if DEBUG;
4840
4841                 my $last_patch_line = $patch_line;
4842                 $patch_line = <$fd>;
4843                 chomp $patch_line;
4844                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4845
4846                 print format_diff_from_to_header($last_patch_line, $patch_line,
4847                                                  $diffinfo, \%from, \%to,
4848                                                  @hash_parents);
4849
4850                 # the patch itself
4851         LINE:
4852                 while ($patch_line = <$fd>) {
4853                         chomp $patch_line;
4854
4855                         next PATCH if ($patch_line =~ m/^diff /);
4856
4857                         print format_diff_line($patch_line, \%from, \%to);
4858                 }
4859
4860         } continue {
4861                 print "</div>\n"; # class="patch"
4862         }
4863
4864         # for compact combined (--cc) format, with chunk and patch simplification
4865         # the patchset might be empty, but there might be unprocessed raw lines
4866         for (++$patch_idx if $patch_number > 0;
4867              $patch_idx < @$difftree;
4868              ++$patch_idx) {
4869                 # read and prepare patch information
4870                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4871
4872                 # generate anchor for "patch" links in difftree / whatchanged part
4873                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4874                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4875                       "</div>\n";  # class="patch"
4876
4877                 $patch_number++;
4878         }
4879
4880         if ($patch_number == 0) {
4881                 if (@hash_parents > 1) {
4882                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4883                 } else {
4884                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4885                 }
4886         }
4887
4888         print "</div>\n"; # class="patchset"
4889 }
4890
4891 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4892
4893 # fills project list info (age, description, owner, category, forks)
4894 # for each project in the list, removing invalid projects from
4895 # returned list
4896 # NOTE: modifies $projlist, but does not remove entries from it
4897 sub fill_project_list_info {
4898         my $projlist = shift;
4899         my @projects;
4900
4901         my $show_ctags = gitweb_check_feature('ctags');
4902  PROJECT:
4903         foreach my $pr (@$projlist) {
4904                 my (@activity) = git_get_last_activity($pr->{'path'});
4905                 unless (@activity) {
4906                         next PROJECT;
4907                 }
4908                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4909                 if (!defined $pr->{'descr'}) {
4910                         my $descr = git_get_project_description($pr->{'path'}) || "";
4911                         $descr = to_utf8($descr);
4912                         $pr->{'descr_long'} = $descr;
4913                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4914                 }
4915                 if (!defined $pr->{'owner'}) {
4916                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4917                 }
4918                 if ($show_ctags) {
4919                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4920                 }
4921                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
4922                         my $cat = git_get_project_category($pr->{'path'}) ||
4923                                                            $project_list_default_category;
4924                         $pr->{'category'} = to_utf8($cat);
4925                 }
4926
4927                 push @projects, $pr;
4928         }
4929
4930         return @projects;
4931 }
4932
4933 sub sort_projects_list {
4934         my ($projlist, $order) = @_;
4935         my @projects;
4936
4937         my %order_info = (
4938                 project => { key => 'path', type => 'str' },
4939                 descr => { key => 'descr_long', type => 'str' },
4940                 owner => { key => 'owner', type => 'str' },
4941                 age => { key => 'age', type => 'num' }
4942         );
4943         my $oi = $order_info{$order};
4944         return @$projlist unless defined $oi;
4945         if ($oi->{'type'} eq 'str') {
4946                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4947         } else {
4948                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4949         }
4950
4951         return @projects;
4952 }
4953
4954 # returns a hash of categories, containing the list of project
4955 # belonging to each category
4956 sub build_projlist_by_category {
4957         my ($projlist, $from, $to) = @_;
4958         my %categories;
4959
4960         $from = 0 unless defined $from;
4961         $to = $#$projlist if (!defined $to || $#$projlist < $to);
4962
4963         for (my $i = $from; $i <= $to; $i++) {
4964                 my $pr = $projlist->[$i];
4965                 push @{$categories{ $pr->{'category'} }}, $pr;
4966         }
4967
4968         return wantarray ? %categories : \%categories;
4969 }
4970
4971 # print 'sort by' <th> element, generating 'sort by $name' replay link
4972 # if that order is not selected
4973 sub print_sort_th {
4974         print format_sort_th(@_);
4975 }
4976
4977 sub format_sort_th {
4978         my ($name, $order, $header) = @_;
4979         my $sort_th = "";
4980         $header ||= ucfirst($name);
4981
4982         if ($order eq $name) {
4983                 $sort_th .= "<th>$header</th>\n";
4984         } else {
4985                 $sort_th .= "<th>" .
4986                             $cgi->a({-href => href(-replay=>1, order=>$name),
4987                                      -class => "header"}, $header) .
4988                             "</th>\n";
4989         }
4990
4991         return $sort_th;
4992 }
4993
4994 sub git_project_list_rows {
4995         my ($projlist, $from, $to, $check_forks) = @_;
4996
4997         $from = 0 unless defined $from;
4998         $to = $#$projlist if (!defined $to || $#$projlist < $to);
4999
5000         my $alternate = 1;
5001         for (my $i = $from; $i <= $to; $i++) {
5002                 my $pr = $projlist->[$i];
5003
5004                 if ($alternate) {
5005                         print "<tr class=\"dark\">\n";
5006                 } else {
5007                         print "<tr class=\"light\">\n";
5008                 }
5009                 $alternate ^= 1;
5010
5011                 if ($check_forks) {
5012                         print "<td>";
5013                         if ($pr->{'forks'}) {
5014                                 my $nforks = scalar @{$pr->{'forks'}};
5015                                 if ($nforks > 0) {
5016                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5017                                                        -title => "$nforks forks"}, "+");
5018                                 } else {
5019                                         print $cgi->span({-title => "$nforks forks"}, "+");
5020                                 }
5021                         }
5022                         print "</td>\n";
5023                 }
5024                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5025                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5026                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5027                                         -class => "list", -title => $pr->{'descr_long'}},
5028                                         esc_html($pr->{'descr'})) . "</td>\n" .
5029                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5030                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5031                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5032                       "<td class=\"link\">" .
5033                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5034                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5035                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5036                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5037                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5038                       "</td>\n" .
5039                       "</tr>\n";
5040         }
5041 }
5042
5043 sub git_project_list_body {
5044         # actually uses global variable $project
5045         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5046         my @projects = @$projlist;
5047
5048         my $check_forks = gitweb_check_feature('forks');
5049         my $show_ctags  = gitweb_check_feature('ctags');
5050         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5051         $check_forks = undef
5052                 if ($tagfilter || $searchtext);
5053
5054         # filtering out forks before filling info allows to do less work
5055         @projects = filter_forks_from_projects_list(\@projects)
5056                 if ($check_forks);
5057         @projects = fill_project_list_info(\@projects);
5058         # searching projects require filling to be run before it
5059         @projects = search_projects_list(\@projects,
5060                                          'searchtext' => $searchtext,
5061                                          'tagfilter'  => $tagfilter)
5062                 if ($tagfilter || $searchtext);
5063
5064         $order ||= $default_projects_order;
5065         $from = 0 unless defined $from;
5066         $to = $#projects if (!defined $to || $#projects < $to);
5067
5068         # short circuit
5069         if ($from > $to) {
5070                 print "<center>\n".
5071                       "<b>No such projects found</b><br />\n".
5072                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5073                       "</center>\n<br />\n";
5074                 return;
5075         }
5076
5077         @projects = sort_projects_list(\@projects, $order);
5078
5079         if ($show_ctags) {
5080                 my $ctags = git_gather_all_ctags(\@projects);
5081                 my $cloud = git_populate_project_tagcloud($ctags);
5082                 print git_show_project_tagcloud($cloud, 64);
5083         }
5084
5085         print "<table class=\"project_list\">\n";
5086         unless ($no_header) {
5087                 print "<tr>\n";
5088                 if ($check_forks) {
5089                         print "<th></th>\n";
5090                 }
5091                 print_sort_th('project', $order, 'Project');
5092                 print_sort_th('descr', $order, 'Description');
5093                 print_sort_th('owner', $order, 'Owner');
5094                 print_sort_th('age', $order, 'Last Change');
5095                 print "<th></th>\n" . # for links
5096                       "</tr>\n";
5097         }
5098
5099         if ($projects_list_group_categories) {
5100                 # only display categories with projects in the $from-$to window
5101                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5102                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5103                 foreach my $cat (sort keys %categories) {
5104                         unless ($cat eq "") {
5105                                 print "<tr>\n";
5106                                 if ($check_forks) {
5107                                         print "<td></td>\n";
5108                                 }
5109                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5110                                 print "</tr>\n";
5111                         }
5112
5113                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5114                 }
5115         } else {
5116                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5117         }
5118
5119         if (defined $extra) {
5120                 print "<tr>\n";
5121                 if ($check_forks) {
5122                         print "<td></td>\n";
5123                 }
5124                 print "<td colspan=\"5\">$extra</td>\n" .
5125                       "</tr>\n";
5126         }
5127         print "</table>\n";
5128 }
5129
5130 sub git_log_body {
5131         # uses global variable $project
5132         my ($commitlist, $from, $to, $refs, $extra) = @_;
5133
5134         $from = 0 unless defined $from;
5135         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5136
5137         for (my $i = 0; $i <= $to; $i++) {
5138                 my %co = %{$commitlist->[$i]};
5139                 next if !%co;
5140                 my $commit = $co{'id'};
5141                 my $ref = format_ref_marker($refs, $commit);
5142                 git_print_header_div('commit',
5143                                "<span class=\"age\">$co{'age_string'}</span>" .
5144                                esc_html($co{'title'}) . $ref,
5145                                $commit);
5146                 print "<div class=\"title_text\">\n" .
5147                       "<div class=\"log_link\">\n" .
5148                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5149                       " | " .
5150                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5151                       " | " .
5152                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5153                       "<br/>\n" .
5154                       "</div>\n";
5155                       git_print_authorship(\%co, -tag => 'span');
5156                       print "<br/>\n</div>\n";
5157
5158                 print "<div class=\"log_body\">\n";
5159                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5160                 print "</div>\n";
5161         }
5162         if ($extra) {
5163                 print "<div class=\"page_nav\">\n";
5164                 print "$extra\n";
5165                 print "</div>\n";
5166         }
5167 }
5168
5169 sub git_shortlog_body {
5170         # uses global variable $project
5171         my ($commitlist, $from, $to, $refs, $extra) = @_;
5172
5173         $from = 0 unless defined $from;
5174         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5175
5176         print "<table class=\"shortlog\">\n";
5177         my $alternate = 1;
5178         for (my $i = $from; $i <= $to; $i++) {
5179                 my %co = %{$commitlist->[$i]};
5180                 my $commit = $co{'id'};
5181                 my $ref = format_ref_marker($refs, $commit);
5182                 if ($alternate) {
5183                         print "<tr class=\"dark\">\n";
5184                 } else {
5185                         print "<tr class=\"light\">\n";
5186                 }
5187                 $alternate ^= 1;
5188                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5189                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5190                       format_author_html('td', \%co, 10) . "<td>";
5191                 print format_subject_html($co{'title'}, $co{'title_short'},
5192                                           href(action=>"commit", hash=>$commit), $ref);
5193                 print "</td>\n" .
5194                       "<td class=\"link\">" .
5195                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5196                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5197                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5198                 my $snapshot_links = format_snapshot_links($commit);
5199                 if (defined $snapshot_links) {
5200                         print " | " . $snapshot_links;
5201                 }
5202                 print "</td>\n" .
5203                       "</tr>\n";
5204         }
5205         if (defined $extra) {
5206                 print "<tr>\n" .
5207                       "<td colspan=\"4\">$extra</td>\n" .
5208                       "</tr>\n";
5209         }
5210         print "</table>\n";
5211 }
5212
5213 sub git_history_body {
5214         # Warning: assumes constant type (blob or tree) during history
5215         my ($commitlist, $from, $to, $refs, $extra,
5216             $file_name, $file_hash, $ftype) = @_;
5217
5218         $from = 0 unless defined $from;
5219         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5220
5221         print "<table class=\"history\">\n";
5222         my $alternate = 1;
5223         for (my $i = $from; $i <= $to; $i++) {
5224                 my %co = %{$commitlist->[$i]};
5225                 if (!%co) {
5226                         next;
5227                 }
5228                 my $commit = $co{'id'};
5229
5230                 my $ref = format_ref_marker($refs, $commit);
5231
5232                 if ($alternate) {
5233                         print "<tr class=\"dark\">\n";
5234                 } else {
5235                         print "<tr class=\"light\">\n";
5236                 }
5237                 $alternate ^= 1;
5238                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5239         # shortlog:   format_author_html('td', \%co, 10)
5240                       format_author_html('td', \%co, 15, 3) . "<td>";
5241                 # originally git_history used chop_str($co{'title'}, 50)
5242                 print format_subject_html($co{'title'}, $co{'title_short'},
5243                                           href(action=>"commit", hash=>$commit), $ref);
5244                 print "</td>\n" .
5245                       "<td class=\"link\">" .
5246                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5247                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5248
5249                 if ($ftype eq 'blob') {
5250                         my $blob_current = $file_hash;
5251                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5252                         if (defined $blob_current && defined $blob_parent &&
5253                                         $blob_current ne $blob_parent) {
5254                                 print " | " .
5255                                         $cgi->a({-href => href(action=>"blobdiff",
5256                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5257                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5258                                                                file_name=>$file_name)},
5259                                                 "diff to current");
5260                         }
5261                 }
5262                 print "</td>\n" .
5263                       "</tr>\n";
5264         }
5265         if (defined $extra) {
5266                 print "<tr>\n" .
5267                       "<td colspan=\"4\">$extra</td>\n" .
5268                       "</tr>\n";
5269         }
5270         print "</table>\n";
5271 }
5272
5273 sub git_tags_body {
5274         # uses global variable $project
5275         my ($taglist, $from, $to, $extra) = @_;
5276         $from = 0 unless defined $from;
5277         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5278
5279         print "<table class=\"tags\">\n";
5280         my $alternate = 1;
5281         for (my $i = $from; $i <= $to; $i++) {
5282                 my $entry = $taglist->[$i];
5283                 my %tag = %$entry;
5284                 my $comment = $tag{'subject'};
5285                 my $comment_short;
5286                 if (defined $comment) {
5287                         $comment_short = chop_str($comment, 30, 5);
5288                 }
5289                 if ($alternate) {
5290                         print "<tr class=\"dark\">\n";
5291                 } else {
5292                         print "<tr class=\"light\">\n";
5293                 }
5294                 $alternate ^= 1;
5295                 if (defined $tag{'age'}) {
5296                         print "<td><i>$tag{'age'}</i></td>\n";
5297                 } else {
5298                         print "<td></td>\n";
5299                 }
5300                 print "<td>" .
5301                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5302                                -class => "list name"}, esc_html($tag{'name'})) .
5303                       "</td>\n" .
5304                       "<td>";
5305                 if (defined $comment) {
5306                         print format_subject_html($comment, $comment_short,
5307                                                   href(action=>"tag", hash=>$tag{'id'}));
5308                 }
5309                 print "</td>\n" .
5310                       "<td class=\"selflink\">";
5311                 if ($tag{'type'} eq "tag") {
5312                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5313                 } else {
5314                         print "&nbsp;";
5315                 }
5316                 print "</td>\n" .
5317                       "<td class=\"link\">" . " | " .
5318                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5319                 if ($tag{'reftype'} eq "commit") {
5320                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5321                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5322                 } elsif ($tag{'reftype'} eq "blob") {
5323                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5324                 }
5325                 print "</td>\n" .
5326                       "</tr>";
5327         }
5328         if (defined $extra) {
5329                 print "<tr>\n" .
5330                       "<td colspan=\"5\">$extra</td>\n" .
5331                       "</tr>\n";
5332         }
5333         print "</table>\n";
5334 }
5335
5336 sub git_heads_body {
5337         # uses global variable $project
5338         my ($headlist, $head, $from, $to, $extra) = @_;
5339         $from = 0 unless defined $from;
5340         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5341
5342         print "<table class=\"heads\">\n";
5343         my $alternate = 1;
5344         for (my $i = $from; $i <= $to; $i++) {
5345                 my $entry = $headlist->[$i];
5346                 my %ref = %$entry;
5347                 my $curr = $ref{'id'} eq $head;
5348                 if ($alternate) {
5349                         print "<tr class=\"dark\">\n";
5350                 } else {
5351                         print "<tr class=\"light\">\n";
5352                 }
5353                 $alternate ^= 1;
5354                 print "<td><i>$ref{'age'}</i></td>\n" .
5355                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5356                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5357                                -class => "list name"},esc_html($ref{'name'})) .
5358                       "</td>\n" .
5359                       "<td class=\"link\">" .
5360                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5361                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5362                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5363                       "</td>\n" .
5364                       "</tr>";
5365         }
5366         if (defined $extra) {
5367                 print "<tr>\n" .
5368                       "<td colspan=\"3\">$extra</td>\n" .
5369                       "</tr>\n";
5370         }
5371         print "</table>\n";
5372 }
5373
5374 # Display a single remote block
5375 sub git_remote_block {
5376         my ($remote, $rdata, $limit, $head) = @_;
5377
5378         my $heads = $rdata->{'heads'};
5379         my $fetch = $rdata->{'fetch'};
5380         my $push = $rdata->{'push'};
5381
5382         my $urls_table = "<table class=\"projects_list\">\n" ;
5383
5384         if (defined $fetch) {
5385                 if ($fetch eq $push) {
5386                         $urls_table .= format_repo_url("URL", $fetch);
5387                 } else {
5388                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5389                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5390                 }
5391         } elsif (defined $push) {
5392                 $urls_table .= format_repo_url("Push URL", $push);
5393         } else {
5394                 $urls_table .= format_repo_url("", "No remote URL");
5395         }
5396
5397         $urls_table .= "</table>\n";
5398
5399         my $dots;
5400         if (defined $limit && $limit < @$heads) {
5401                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5402         }
5403
5404         print $urls_table;
5405         git_heads_body($heads, $head, 0, $limit, $dots);
5406 }
5407
5408 # Display a list of remote names with the respective fetch and push URLs
5409 sub git_remotes_list {
5410         my ($remotedata, $limit) = @_;
5411         print "<table class=\"heads\">\n";
5412         my $alternate = 1;
5413         my @remotes = sort keys %$remotedata;
5414
5415         my $limited = $limit && $limit < @remotes;
5416
5417         $#remotes = $limit - 1 if $limited;
5418
5419         while (my $remote = shift @remotes) {
5420                 my $rdata = $remotedata->{$remote};
5421                 my $fetch = $rdata->{'fetch'};
5422                 my $push = $rdata->{'push'};
5423                 if ($alternate) {
5424                         print "<tr class=\"dark\">\n";
5425                 } else {
5426                         print "<tr class=\"light\">\n";
5427                 }
5428                 $alternate ^= 1;
5429                 print "<td>" .
5430                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5431                                -class=> "list name"},esc_html($remote)) .
5432                       "</td>";
5433                 print "<td class=\"link\">" .
5434                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5435                       " | " .
5436                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5437                       "</td>";
5438
5439                 print "</tr>\n";
5440         }
5441
5442         if ($limited) {
5443                 print "<tr>\n" .
5444                       "<td colspan=\"3\">" .
5445                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5446                       "</td>\n" . "</tr>\n";
5447         }
5448
5449         print "</table>";
5450 }
5451
5452 # Display remote heads grouped by remote, unless there are too many
5453 # remotes, in which case we only display the remote names
5454 sub git_remotes_body {
5455         my ($remotedata, $limit, $head) = @_;
5456         if ($limit and $limit < keys %$remotedata) {
5457                 git_remotes_list($remotedata, $limit);
5458         } else {
5459                 fill_remote_heads($remotedata);
5460                 while (my ($remote, $rdata) = each %$remotedata) {
5461                         git_print_section({-class=>"remote", -id=>$remote},
5462                                 ["remotes", $remote, $remote], sub {
5463                                         git_remote_block($remote, $rdata, $limit, $head);
5464                                 });
5465                 }
5466         }
5467 }
5468
5469 sub git_search_grep_body {
5470         my ($commitlist, $from, $to, $extra) = @_;
5471         $from = 0 unless defined $from;
5472         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5473
5474         print "<table class=\"commit_search\">\n";
5475         my $alternate = 1;
5476         for (my $i = $from; $i <= $to; $i++) {
5477                 my %co = %{$commitlist->[$i]};
5478                 if (!%co) {
5479                         next;
5480                 }
5481                 my $commit = $co{'id'};
5482                 if ($alternate) {
5483                         print "<tr class=\"dark\">\n";
5484                 } else {
5485                         print "<tr class=\"light\">\n";
5486                 }
5487                 $alternate ^= 1;
5488                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5489                       format_author_html('td', \%co, 15, 5) .
5490                       "<td>" .
5491                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5492                                -class => "list subject"},
5493                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5494                 my $comment = $co{'comment'};
5495                 foreach my $line (@$comment) {
5496                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5497                                 my ($lead, $match, $trail) = ($1, $2, $3);
5498                                 $match = chop_str($match, 70, 5, 'center');
5499                                 my $contextlen = int((80 - length($match))/2);
5500                                 $contextlen = 30 if ($contextlen > 30);
5501                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5502                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5503
5504                                 $lead  = esc_html($lead);
5505                                 $match = esc_html($match);
5506                                 $trail = esc_html($trail);
5507
5508                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5509                         }
5510                 }
5511                 print "</td>\n" .
5512                       "<td class=\"link\">" .
5513                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5514                       " | " .
5515                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5516                       " | " .
5517                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5518                 print "</td>\n" .
5519                       "</tr>\n";
5520         }
5521         if (defined $extra) {
5522                 print "<tr>\n" .
5523                       "<td colspan=\"3\">$extra</td>\n" .
5524                       "</tr>\n";
5525         }
5526         print "</table>\n";
5527 }
5528
5529 ## ======================================================================
5530 ## ======================================================================
5531 ## actions
5532
5533 sub git_project_list {
5534         my $order = $input_params{'order'};
5535         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5536                 die_error(400, "Unknown order parameter");
5537         }
5538
5539         my @list = git_get_projects_list();
5540         if (!@list) {
5541                 die_error(404, "No projects found");
5542         }
5543
5544         git_header_html();
5545         if (defined $home_text && -f $home_text) {
5546                 print "<div class=\"index_include\">\n";
5547                 insert_file($home_text);
5548                 print "</div>\n";
5549         }
5550         print $cgi->startform(-method => "get") .
5551               "<p class=\"projsearch\">Search:\n" .
5552               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5553               "</p>" .
5554               $cgi->end_form() . "\n";
5555         git_project_list_body(\@list, $order);
5556         git_footer_html();
5557 }
5558
5559 sub git_forks {
5560         my $order = $input_params{'order'};
5561         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5562                 die_error(400, "Unknown order parameter");
5563         }
5564
5565         my @list = git_get_projects_list($project);
5566         if (!@list) {
5567                 die_error(404, "No forks found");
5568         }
5569
5570         git_header_html();
5571         git_print_page_nav('','');
5572         git_print_header_div('summary', "$project forks");
5573         git_project_list_body(\@list, $order);
5574         git_footer_html();
5575 }
5576
5577 sub git_project_index {
5578         my @projects = git_get_projects_list();
5579         if (!@projects) {
5580                 die_error(404, "No projects found");
5581         }
5582
5583         print $cgi->header(
5584                 -type => 'text/plain',
5585                 -charset => 'utf-8',
5586                 -content_disposition => 'inline; filename="index.aux"');
5587
5588         foreach my $pr (@projects) {
5589                 if (!exists $pr->{'owner'}) {
5590                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5591                 }
5592
5593                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5594                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5595                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5596                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5597                 $path  =~ s/ /\+/g;
5598                 $owner =~ s/ /\+/g;
5599
5600                 print "$path $owner\n";
5601         }
5602 }
5603
5604 sub git_summary {
5605         my $descr = git_get_project_description($project) || "none";
5606         my %co = parse_commit("HEAD");
5607         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5608         my $head = $co{'id'};
5609         my $remote_heads = gitweb_check_feature('remote_heads');
5610
5611         my $owner = git_get_project_owner($project);
5612
5613         my $refs = git_get_references();
5614         # These get_*_list functions return one more to allow us to see if
5615         # there are more ...
5616         my @taglist  = git_get_tags_list(16);
5617         my @headlist = git_get_heads_list(16);
5618         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5619         my @forklist;
5620         my $check_forks = gitweb_check_feature('forks');
5621
5622         if ($check_forks) {
5623                 # find forks of a project
5624                 @forklist = git_get_projects_list($project);
5625                 # filter out forks of forks
5626                 @forklist = filter_forks_from_projects_list(\@forklist)
5627                         if (@forklist);
5628         }
5629
5630         git_header_html();
5631         git_print_page_nav('summary','', $head);
5632
5633         print "<div class=\"title\">&nbsp;</div>\n";
5634         print "<table class=\"projects_list\">\n" .
5635               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5636               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5637         if (defined $cd{'rfc2822'}) {
5638                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5639                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5640         }
5641
5642         # use per project git URL list in $projectroot/$project/cloneurl
5643         # or make project git URL from git base URL and project name
5644         my $url_tag = "URL";
5645         my @url_list = git_get_project_url_list($project);
5646         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5647         foreach my $git_url (@url_list) {
5648                 next unless $git_url;
5649                 print format_repo_url($url_tag, $git_url);
5650                 $url_tag = "";
5651         }
5652
5653         # Tag cloud
5654         my $show_ctags = gitweb_check_feature('ctags');
5655         if ($show_ctags) {
5656                 my $ctags = git_get_project_ctags($project);
5657                 if (%$ctags) {
5658                         # without ability to add tags, don't show if there are none
5659                         my $cloud = git_populate_project_tagcloud($ctags);
5660                         print "<tr id=\"metadata_ctags\">" .
5661                               "<td>content tags</td>" .
5662                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5663                               "</tr>\n";
5664                 }
5665         }
5666
5667         print "</table>\n";
5668
5669         # If XSS prevention is on, we don't include README.html.
5670         # TODO: Allow a readme in some safe format.
5671         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5672                 print "<div class=\"title\">readme</div>\n" .
5673                       "<div class=\"readme\">\n";
5674                 insert_file("$projectroot/$project/README.html");
5675                 print "\n</div>\n"; # class="readme"
5676         }
5677
5678         # we need to request one more than 16 (0..15) to check if
5679         # those 16 are all
5680         my @commitlist = $head ? parse_commits($head, 17) : ();
5681         if (@commitlist) {
5682                 git_print_header_div('shortlog');
5683                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5684                                   $#commitlist <=  15 ? undef :
5685                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5686         }
5687
5688         if (@taglist) {
5689                 git_print_header_div('tags');
5690                 git_tags_body(\@taglist, 0, 15,
5691                               $#taglist <=  15 ? undef :
5692                               $cgi->a({-href => href(action=>"tags")}, "..."));
5693         }
5694
5695         if (@headlist) {
5696                 git_print_header_div('heads');
5697                 git_heads_body(\@headlist, $head, 0, 15,
5698                                $#headlist <= 15 ? undef :
5699                                $cgi->a({-href => href(action=>"heads")}, "..."));
5700         }
5701
5702         if (%remotedata) {
5703                 git_print_header_div('remotes');
5704                 git_remotes_body(\%remotedata, 15, $head);
5705         }
5706
5707         if (@forklist) {
5708                 git_print_header_div('forks');
5709                 git_project_list_body(\@forklist, 'age', 0, 15,
5710                                       $#forklist <= 15 ? undef :
5711                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5712                                       'no_header');
5713         }
5714
5715         git_footer_html();
5716 }
5717
5718 sub git_tag {
5719         my %tag = parse_tag($hash);
5720
5721         if (! %tag) {
5722                 die_error(404, "Unknown tag object");
5723         }
5724
5725         my $head = git_get_head_hash($project);
5726         git_header_html();
5727         git_print_page_nav('','', $head,undef,$head);
5728         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5729         print "<div class=\"title_text\">\n" .
5730               "<table class=\"object_header\">\n" .
5731               "<tr>\n" .
5732               "<td>object</td>\n" .
5733               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5734                                $tag{'object'}) . "</td>\n" .
5735               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5736                                               $tag{'type'}) . "</td>\n" .
5737               "</tr>\n";
5738         if (defined($tag{'author'})) {
5739                 git_print_authorship_rows(\%tag, 'author');
5740         }
5741         print "</table>\n\n" .
5742               "</div>\n";
5743         print "<div class=\"page_body\">";
5744         my $comment = $tag{'comment'};
5745         foreach my $line (@$comment) {
5746                 chomp $line;
5747                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5748         }
5749         print "</div>\n";
5750         git_footer_html();
5751 }
5752
5753 sub git_blame_common {
5754         my $format = shift || 'porcelain';
5755         if ($format eq 'porcelain' && $cgi->param('js')) {
5756                 $format = 'incremental';
5757                 $action = 'blame_incremental'; # for page title etc
5758         }
5759
5760         # permissions
5761         gitweb_check_feature('blame')
5762                 or die_error(403, "Blame view not allowed");
5763
5764         # error checking
5765         die_error(400, "No file name given") unless $file_name;
5766         $hash_base ||= git_get_head_hash($project);
5767         die_error(404, "Couldn't find base commit") unless $hash_base;
5768         my %co = parse_commit($hash_base)
5769                 or die_error(404, "Commit not found");
5770         my $ftype = "blob";
5771         if (!defined $hash) {
5772                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5773                         or die_error(404, "Error looking up file");
5774         } else {
5775                 $ftype = git_get_type($hash);
5776                 if ($ftype !~ "blob") {
5777                         die_error(400, "Object is not a blob");
5778                 }
5779         }
5780
5781         my $fd;
5782         if ($format eq 'incremental') {
5783                 # get file contents (as base)
5784                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5785                         or die_error(500, "Open git-cat-file failed");
5786         } elsif ($format eq 'data') {
5787                 # run git-blame --incremental
5788                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5789                         $hash_base, "--", $file_name
5790                         or die_error(500, "Open git-blame --incremental failed");
5791         } else {
5792                 # run git-blame --porcelain
5793                 open $fd, "-|", git_cmd(), "blame", '-p',
5794                         $hash_base, '--', $file_name
5795                         or die_error(500, "Open git-blame --porcelain failed");
5796         }
5797
5798         # incremental blame data returns early
5799         if ($format eq 'data') {
5800                 print $cgi->header(
5801                         -type=>"text/plain", -charset => "utf-8",
5802                         -status=> "200 OK");
5803                 local $| = 1; # output autoflush
5804                 print while <$fd>;
5805                 close $fd
5806                         or print "ERROR $!\n";
5807
5808                 print 'END';
5809                 if (defined $t0 && gitweb_check_feature('timed')) {
5810                         print ' '.
5811                               tv_interval($t0, [ gettimeofday() ]).
5812                               ' '.$number_of_git_cmds;
5813                 }
5814                 print "\n";
5815
5816                 return;
5817         }
5818
5819         # page header
5820         git_header_html();
5821         my $formats_nav =
5822                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5823                         "blob") .
5824                 " | ";
5825         if ($format eq 'incremental') {
5826                 $formats_nav .=
5827                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5828                                 "blame") . " (non-incremental)";
5829         } else {
5830                 $formats_nav .=
5831                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5832                                 "blame") . " (incremental)";
5833         }
5834         $formats_nav .=
5835                 " | " .
5836                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5837                         "history") .
5838                 " | " .
5839                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5840                         "HEAD");
5841         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5842         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5843         git_print_page_path($file_name, $ftype, $hash_base);
5844
5845         # page body
5846         if ($format eq 'incremental') {
5847                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5848                       "This page requires JavaScript to run.\n Use ".
5849                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5850                               'this page').
5851                       " instead.\n".
5852                       "</b></center></div>\n</noscript>\n";
5853
5854                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5855         }
5856
5857         print qq!<div class="page_body">\n!;
5858         print qq!<div id="progress_info">... / ...</div>\n!
5859                 if ($format eq 'incremental');
5860         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5861               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5862               qq!<thead>\n!.
5863               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5864               qq!</thead>\n!.
5865               qq!<tbody>\n!;
5866
5867         my @rev_color = qw(light dark);
5868         my $num_colors = scalar(@rev_color);
5869         my $current_color = 0;
5870
5871         if ($format eq 'incremental') {
5872                 my $color_class = $rev_color[$current_color];
5873
5874                 #contents of a file
5875                 my $linenr = 0;
5876         LINE:
5877                 while (my $line = <$fd>) {
5878                         chomp $line;
5879                         $linenr++;
5880
5881                         print qq!<tr id="l$linenr" class="$color_class">!.
5882                               qq!<td class="sha1"><a href=""> </a></td>!.
5883                               qq!<td class="linenr">!.
5884                               qq!<a class="linenr" href="">$linenr</a></td>!;
5885                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5886                         print qq!</tr>\n!;
5887                 }
5888
5889         } else { # porcelain, i.e. ordinary blame
5890                 my %metainfo = (); # saves information about commits
5891
5892                 # blame data
5893         LINE:
5894                 while (my $line = <$fd>) {
5895                         chomp $line;
5896                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5897                         # no <lines in group> for subsequent lines in group of lines
5898                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5899                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5900                         if (!exists $metainfo{$full_rev}) {
5901                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5902                         }
5903                         my $meta = $metainfo{$full_rev};
5904                         my $data;
5905                         while ($data = <$fd>) {
5906                                 chomp $data;
5907                                 last if ($data =~ s/^\t//); # contents of line
5908                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5909                                         $meta->{$1} = $2 unless exists $meta->{$1};
5910                                 }
5911                                 if ($data =~ /^previous /) {
5912                                         $meta->{'nprevious'}++;
5913                                 }
5914                         }
5915                         my $short_rev = substr($full_rev, 0, 8);
5916                         my $author = $meta->{'author'};
5917                         my %date =
5918                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5919                         my $date = $date{'iso-tz'};
5920                         if ($group_size) {
5921                                 $current_color = ($current_color + 1) % $num_colors;
5922                         }
5923                         my $tr_class = $rev_color[$current_color];
5924                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5925                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5926                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5927                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5928                         if ($group_size) {
5929                                 print "<td class=\"sha1\"";
5930                                 print " title=\"". esc_html($author) . ", $date\"";
5931                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5932                                 print ">";
5933                                 print $cgi->a({-href => href(action=>"commit",
5934                                                              hash=>$full_rev,
5935                                                              file_name=>$file_name)},
5936                                               esc_html($short_rev));
5937                                 if ($group_size >= 2) {
5938                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5939                                         if (@author_initials) {
5940                                                 print "<br />" .
5941                                                       esc_html(join('', @author_initials));
5942                                                 #           or join('.', ...)
5943                                         }
5944                                 }
5945                                 print "</td>\n";
5946                         }
5947                         # 'previous' <sha1 of parent commit> <filename at commit>
5948                         if (exists $meta->{'previous'} &&
5949                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5950                                 $meta->{'parent'} = $1;
5951                                 $meta->{'file_parent'} = unquote($2);
5952                         }
5953                         my $linenr_commit =
5954                                 exists($meta->{'parent'}) ?
5955                                 $meta->{'parent'} : $full_rev;
5956                         my $linenr_filename =
5957                                 exists($meta->{'file_parent'}) ?
5958                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5959                         my $blamed = href(action => 'blame',
5960                                           file_name => $linenr_filename,
5961                                           hash_base => $linenr_commit);
5962                         print "<td class=\"linenr\">";
5963                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5964                                         -class => "linenr" },
5965                                       esc_html($lineno));
5966                         print "</td>";
5967                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5968                         print "</tr>\n";
5969                 } # end while
5970
5971         }
5972
5973         # footer
5974         print "</tbody>\n".
5975               "</table>\n"; # class="blame"
5976         print "</div>\n";   # class="blame_body"
5977         close $fd
5978                 or print "Reading blob failed\n";
5979
5980         git_footer_html();
5981 }
5982
5983 sub git_blame {
5984         git_blame_common();
5985 }
5986
5987 sub git_blame_incremental {
5988         git_blame_common('incremental');
5989 }
5990
5991 sub git_blame_data {
5992         git_blame_common('data');
5993 }
5994
5995 sub git_tags {
5996         my $head = git_get_head_hash($project);
5997         git_header_html();
5998         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5999         git_print_header_div('summary', $project);
6000
6001         my @tagslist = git_get_tags_list();
6002         if (@tagslist) {
6003                 git_tags_body(\@tagslist);
6004         }
6005         git_footer_html();
6006 }
6007
6008 sub git_heads {
6009         my $head = git_get_head_hash($project);
6010         git_header_html();
6011         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6012         git_print_header_div('summary', $project);
6013
6014         my @headslist = git_get_heads_list();
6015         if (@headslist) {
6016                 git_heads_body(\@headslist, $head);
6017         }
6018         git_footer_html();
6019 }
6020
6021 # used both for single remote view and for list of all the remotes
6022 sub git_remotes {
6023         gitweb_check_feature('remote_heads')
6024                 or die_error(403, "Remote heads view is disabled");
6025
6026         my $head = git_get_head_hash($project);
6027         my $remote = $input_params{'hash'};
6028
6029         my $remotedata = git_get_remotes_list($remote);
6030         die_error(500, "Unable to get remote information") unless defined $remotedata;
6031
6032         unless (%$remotedata) {
6033                 die_error(404, defined $remote ?
6034                         "Remote $remote not found" :
6035                         "No remotes found");
6036         }
6037
6038         git_header_html(undef, undef, -action_extra => $remote);
6039         git_print_page_nav('', '',  $head, undef, $head,
6040                 format_ref_views($remote ? '' : 'remotes'));
6041
6042         fill_remote_heads($remotedata);
6043         if (defined $remote) {
6044                 git_print_header_div('remotes', "$remote remote for $project");
6045                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6046         } else {
6047                 git_print_header_div('summary', "$project remotes");
6048                 git_remotes_body($remotedata, undef, $head);
6049         }
6050
6051         git_footer_html();
6052 }
6053
6054 sub git_blob_plain {
6055         my $type = shift;
6056         my $expires;
6057
6058         if (!defined $hash) {
6059                 if (defined $file_name) {
6060                         my $base = $hash_base || git_get_head_hash($project);
6061                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6062                                 or die_error(404, "Cannot find file");
6063                 } else {
6064                         die_error(400, "No file name defined");
6065                 }
6066         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6067                 # blobs defined by non-textual hash id's can be cached
6068                 $expires = "+1d";
6069         }
6070
6071         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6072                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6073
6074         # content-type (can include charset)
6075         $type = blob_contenttype($fd, $file_name, $type);
6076
6077         # "save as" filename, even when no $file_name is given
6078         my $save_as = "$hash";
6079         if (defined $file_name) {
6080                 $save_as = $file_name;
6081         } elsif ($type =~ m/^text\//) {
6082                 $save_as .= '.txt';
6083         }
6084
6085         # With XSS prevention on, blobs of all types except a few known safe
6086         # ones are served with "Content-Disposition: attachment" to make sure
6087         # they don't run in our security domain.  For certain image types,
6088         # blob view writes an <img> tag referring to blob_plain view, and we
6089         # want to be sure not to break that by serving the image as an
6090         # attachment (though Firefox 3 doesn't seem to care).
6091         my $sandbox = $prevent_xss &&
6092                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
6093
6094         print $cgi->header(
6095                 -type => $type,
6096                 -expires => $expires,
6097                 -content_disposition =>
6098                         ($sandbox ? 'attachment' : 'inline')
6099                         . '; filename="' . $save_as . '"');
6100         local $/ = undef;
6101         binmode STDOUT, ':raw';
6102         print <$fd>;
6103         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6104         close $fd;
6105 }
6106
6107 sub git_blob {
6108         my $expires;
6109
6110         if (!defined $hash) {
6111                 if (defined $file_name) {
6112                         my $base = $hash_base || git_get_head_hash($project);
6113                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6114                                 or die_error(404, "Cannot find file");
6115                 } else {
6116                         die_error(400, "No file name defined");
6117                 }
6118         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6119                 # blobs defined by non-textual hash id's can be cached
6120                 $expires = "+1d";
6121         }
6122
6123         my $have_blame = gitweb_check_feature('blame');
6124         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6125                 or die_error(500, "Couldn't cat $file_name, $hash");
6126         my $mimetype = blob_mimetype($fd, $file_name);
6127         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6128         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6129                 close $fd;
6130                 return git_blob_plain($mimetype);
6131         }
6132         # we can have blame only for text/* mimetype
6133         $have_blame &&= ($mimetype =~ m!^text/!);
6134
6135         my $highlight = gitweb_check_feature('highlight');
6136         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6137         $fd = run_highlighter($fd, $highlight, $syntax)
6138                 if $syntax;
6139
6140         git_header_html(undef, $expires);
6141         my $formats_nav = '';
6142         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6143                 if (defined $file_name) {
6144                         if ($have_blame) {
6145                                 $formats_nav .=
6146                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6147                                                 "blame") .
6148                                         " | ";
6149                         }
6150                         $formats_nav .=
6151                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6152                                         "history") .
6153                                 " | " .
6154                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6155                                         "raw") .
6156                                 " | " .
6157                                 $cgi->a({-href => href(action=>"blob",
6158                                                        hash_base=>"HEAD", file_name=>$file_name)},
6159                                         "HEAD");
6160                 } else {
6161                         $formats_nav .=
6162                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6163                                         "raw");
6164                 }
6165                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6166                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6167         } else {
6168                 print "<div class=\"page_nav\">\n" .
6169                       "<br/><br/></div>\n" .
6170                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6171         }
6172         git_print_page_path($file_name, "blob", $hash_base);
6173         print "<div class=\"page_body\">\n";
6174         if ($mimetype =~ m!^image/!) {
6175                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6176                 if ($file_name) {
6177                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6178                 }
6179                 print qq! src="! .
6180                       href(action=>"blob_plain", hash=>$hash,
6181                            hash_base=>$hash_base, file_name=>$file_name) .
6182                       qq!" />\n!;
6183         } else {
6184                 my $nr;
6185                 while (my $line = <$fd>) {
6186                         chomp $line;
6187                         $nr++;
6188                         $line = untabify($line);
6189                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6190                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6191                 }
6192         }
6193         close $fd
6194                 or print "Reading blob failed.\n";
6195         print "</div>";
6196         git_footer_html();
6197 }
6198
6199 sub git_tree {
6200         if (!defined $hash_base) {
6201                 $hash_base = "HEAD";
6202         }
6203         if (!defined $hash) {
6204                 if (defined $file_name) {
6205                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6206                 } else {
6207                         $hash = $hash_base;
6208                 }
6209         }
6210         die_error(404, "No such tree") unless defined($hash);
6211
6212         my $show_sizes = gitweb_check_feature('show-sizes');
6213         my $have_blame = gitweb_check_feature('blame');
6214
6215         my @entries = ();
6216         {
6217                 local $/ = "\0";
6218                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6219                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6220                         or die_error(500, "Open git-ls-tree failed");
6221                 @entries = map { chomp; $_ } <$fd>;
6222                 close $fd
6223                         or die_error(404, "Reading tree failed");
6224         }
6225
6226         my $refs = git_get_references();
6227         my $ref = format_ref_marker($refs, $hash_base);
6228         git_header_html();
6229         my $basedir = '';
6230         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6231                 my @views_nav = ();
6232                 if (defined $file_name) {
6233                         push @views_nav,
6234                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6235                                         "history"),
6236                                 $cgi->a({-href => href(action=>"tree",
6237                                                        hash_base=>"HEAD", file_name=>$file_name)},
6238                                         "HEAD"),
6239                 }
6240                 my $snapshot_links = format_snapshot_links($hash);
6241                 if (defined $snapshot_links) {
6242                         # FIXME: Should be available when we have no hash base as well.
6243                         push @views_nav, $snapshot_links;
6244                 }
6245                 git_print_page_nav('tree','', $hash_base, undef, undef,
6246                                    join(' | ', @views_nav));
6247                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6248         } else {
6249                 undef $hash_base;
6250                 print "<div class=\"page_nav\">\n";
6251                 print "<br/><br/></div>\n";
6252                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6253         }
6254         if (defined $file_name) {
6255                 $basedir = $file_name;
6256                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6257                         $basedir .= '/';
6258                 }
6259                 git_print_page_path($file_name, 'tree', $hash_base);
6260         }
6261         print "<div class=\"page_body\">\n";
6262         print "<table class=\"tree\">\n";
6263         my $alternate = 1;
6264         # '..' (top directory) link if possible
6265         if (defined $hash_base &&
6266             defined $file_name && $file_name =~ m![^/]+$!) {
6267                 if ($alternate) {
6268                         print "<tr class=\"dark\">\n";
6269                 } else {
6270                         print "<tr class=\"light\">\n";
6271                 }
6272                 $alternate ^= 1;
6273
6274                 my $up = $file_name;
6275                 $up =~ s!/?[^/]+$!!;
6276                 undef $up unless $up;
6277                 # based on git_print_tree_entry
6278                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6279                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6280                 print '<td class="list">';
6281                 print $cgi->a({-href => href(action=>"tree",
6282                                              hash_base=>$hash_base,
6283                                              file_name=>$up)},
6284                               "..");
6285                 print "</td>\n";
6286                 print "<td class=\"link\"></td>\n";
6287
6288                 print "</tr>\n";
6289         }
6290         foreach my $line (@entries) {
6291                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6292
6293                 if ($alternate) {
6294                         print "<tr class=\"dark\">\n";
6295                 } else {
6296                         print "<tr class=\"light\">\n";
6297                 }
6298                 $alternate ^= 1;
6299
6300                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6301
6302                 print "</tr>\n";
6303         }
6304         print "</table>\n" .
6305               "</div>";
6306         git_footer_html();
6307 }
6308
6309 sub snapshot_name {
6310         my ($project, $hash) = @_;
6311
6312         # path/to/project.git  -> project
6313         # path/to/project/.git -> project
6314         my $name = to_utf8($project);
6315         $name =~ s,([^/])/*\.git$,$1,;
6316         $name = basename($name);
6317         # sanitize name
6318         $name =~ s/[[:cntrl:]]/?/g;
6319
6320         my $ver = $hash;
6321         if ($hash =~ /^[0-9a-fA-F]+$/) {
6322                 # shorten SHA-1 hash
6323                 my $full_hash = git_get_full_hash($project, $hash);
6324                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6325                         $ver = git_get_short_hash($project, $hash);
6326                 }
6327         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6328                 # tags don't need shortened SHA-1 hash
6329                 $ver = $1;
6330         } else {
6331                 # branches and other need shortened SHA-1 hash
6332                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6333                         $ver = $1;
6334                 }
6335                 $ver .= '-' . git_get_short_hash($project, $hash);
6336         }
6337         # in case of hierarchical branch names
6338         $ver =~ s!/!.!g;
6339
6340         # name = project-version_string
6341         $name = "$name-$ver";
6342
6343         return wantarray ? ($name, $name) : $name;
6344 }
6345
6346 sub git_snapshot {
6347         my $format = $input_params{'snapshot_format'};
6348         if (!@snapshot_fmts) {
6349                 die_error(403, "Snapshots not allowed");
6350         }
6351         # default to first supported snapshot format
6352         $format ||= $snapshot_fmts[0];
6353         if ($format !~ m/^[a-z0-9]+$/) {
6354                 die_error(400, "Invalid snapshot format parameter");
6355         } elsif (!exists($known_snapshot_formats{$format})) {
6356                 die_error(400, "Unknown snapshot format");
6357         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6358                 die_error(403, "Snapshot format not allowed");
6359         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6360                 die_error(403, "Unsupported snapshot format");
6361         }
6362
6363         my $type = git_get_type("$hash^{}");
6364         if (!$type) {
6365                 die_error(404, 'Object does not exist');
6366         }  elsif ($type eq 'blob') {
6367                 die_error(400, 'Object is not a tree-ish');
6368         }
6369
6370         my ($name, $prefix) = snapshot_name($project, $hash);
6371         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6372         my $cmd = quote_command(
6373                 git_cmd(), 'archive',
6374                 "--format=$known_snapshot_formats{$format}{'format'}",
6375                 "--prefix=$prefix/", $hash);
6376         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6377                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6378         }
6379
6380         $filename =~ s/(["\\])/\\$1/g;
6381         print $cgi->header(
6382                 -type => $known_snapshot_formats{$format}{'type'},
6383                 -content_disposition => 'inline; filename="' . $filename . '"',
6384                 -status => '200 OK');
6385
6386         open my $fd, "-|", $cmd
6387                 or die_error(500, "Execute git-archive failed");
6388         binmode STDOUT, ':raw';
6389         print <$fd>;
6390         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6391         close $fd;
6392 }
6393
6394 sub git_log_generic {
6395         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6396
6397         my $head = git_get_head_hash($project);
6398         if (!defined $base) {
6399                 $base = $head;
6400         }
6401         if (!defined $page) {
6402                 $page = 0;
6403         }
6404         my $refs = git_get_references();
6405
6406         my $commit_hash = $base;
6407         if (defined $parent) {
6408                 $commit_hash = "$parent..$base";
6409         }
6410         my @commitlist =
6411                 parse_commits($commit_hash, 101, (100 * $page),
6412                               defined $file_name ? ($file_name, "--full-history") : ());
6413
6414         my $ftype;
6415         if (!defined $file_hash && defined $file_name) {
6416                 # some commits could have deleted file in question,
6417                 # and not have it in tree, but one of them has to have it
6418                 for (my $i = 0; $i < @commitlist; $i++) {
6419                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6420                         last if defined $file_hash;
6421                 }
6422         }
6423         if (defined $file_hash) {
6424                 $ftype = git_get_type($file_hash);
6425         }
6426         if (defined $file_name && !defined $ftype) {
6427                 die_error(500, "Unknown type of object");
6428         }
6429         my %co;
6430         if (defined $file_name) {
6431                 %co = parse_commit($base)
6432                         or die_error(404, "Unknown commit object");
6433         }
6434
6435
6436         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6437         my $next_link = '';
6438         if ($#commitlist >= 100) {
6439                 $next_link =
6440                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6441                                  -accesskey => "n", -title => "Alt-n"}, "next");
6442         }
6443         my $patch_max = gitweb_get_feature('patches');
6444         if ($patch_max && !defined $file_name) {
6445                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6446                         $paging_nav .= " &sdot; " .
6447                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6448                                         "patches");
6449                 }
6450         }
6451
6452         git_header_html();
6453         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6454         if (defined $file_name) {
6455                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6456         } else {
6457                 git_print_header_div('summary', $project)
6458         }
6459         git_print_page_path($file_name, $ftype, $hash_base)
6460                 if (defined $file_name);
6461
6462         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6463                      $file_name, $file_hash, $ftype);
6464
6465         git_footer_html();
6466 }
6467
6468 sub git_log {
6469         git_log_generic('log', \&git_log_body,
6470                         $hash, $hash_parent);
6471 }
6472
6473 sub git_commit {
6474         $hash ||= $hash_base || "HEAD";
6475         my %co = parse_commit($hash)
6476             or die_error(404, "Unknown commit object");
6477
6478         my $parent  = $co{'parent'};
6479         my $parents = $co{'parents'}; # listref
6480
6481         # we need to prepare $formats_nav before any parameter munging
6482         my $formats_nav;
6483         if (!defined $parent) {
6484                 # --root commitdiff
6485                 $formats_nav .= '(initial)';
6486         } elsif (@$parents == 1) {
6487                 # single parent commit
6488                 $formats_nav .=
6489                         '(parent: ' .
6490                         $cgi->a({-href => href(action=>"commit",
6491                                                hash=>$parent)},
6492                                 esc_html(substr($parent, 0, 7))) .
6493                         ')';
6494         } else {
6495                 # merge commit
6496                 $formats_nav .=
6497                         '(merge: ' .
6498                         join(' ', map {
6499                                 $cgi->a({-href => href(action=>"commit",
6500                                                        hash=>$_)},
6501                                         esc_html(substr($_, 0, 7)));
6502                         } @$parents ) .
6503                         ')';
6504         }
6505         if (gitweb_check_feature('patches') && @$parents <= 1) {
6506                 $formats_nav .= " | " .
6507                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6508                                 "patch");
6509         }
6510
6511         if (!defined $parent) {
6512                 $parent = "--root";
6513         }
6514         my @difftree;
6515         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6516                 @diff_opts,
6517                 (@$parents <= 1 ? $parent : '-c'),
6518                 $hash, "--"
6519                 or die_error(500, "Open git-diff-tree failed");
6520         @difftree = map { chomp; $_ } <$fd>;
6521         close $fd or die_error(404, "Reading git-diff-tree failed");
6522
6523         # non-textual hash id's can be cached
6524         my $expires;
6525         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6526                 $expires = "+1d";
6527         }
6528         my $refs = git_get_references();
6529         my $ref = format_ref_marker($refs, $co{'id'});
6530
6531         git_header_html(undef, $expires);
6532         git_print_page_nav('commit', '',
6533                            $hash, $co{'tree'}, $hash,
6534                            $formats_nav);
6535
6536         if (defined $co{'parent'}) {
6537                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6538         } else {
6539                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6540         }
6541         print "<div class=\"title_text\">\n" .
6542               "<table class=\"object_header\">\n";
6543         git_print_authorship_rows(\%co);
6544         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6545         print "<tr>" .
6546               "<td>tree</td>" .
6547               "<td class=\"sha1\">" .
6548               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6549                        class => "list"}, $co{'tree'}) .
6550               "</td>" .
6551               "<td class=\"link\">" .
6552               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6553                       "tree");
6554         my $snapshot_links = format_snapshot_links($hash);
6555         if (defined $snapshot_links) {
6556                 print " | " . $snapshot_links;
6557         }
6558         print "</td>" .
6559               "</tr>\n";
6560
6561         foreach my $par (@$parents) {
6562                 print "<tr>" .
6563                       "<td>parent</td>" .
6564                       "<td class=\"sha1\">" .
6565                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6566                                class => "list"}, $par) .
6567                       "</td>" .
6568                       "<td class=\"link\">" .
6569                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6570                       " | " .
6571                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6572                       "</td>" .
6573                       "</tr>\n";
6574         }
6575         print "</table>".
6576               "</div>\n";
6577
6578         print "<div class=\"page_body\">\n";
6579         git_print_log($co{'comment'});
6580         print "</div>\n";
6581
6582         git_difftree_body(\@difftree, $hash, @$parents);
6583
6584         git_footer_html();
6585 }
6586
6587 sub git_object {
6588         # object is defined by:
6589         # - hash or hash_base alone
6590         # - hash_base and file_name
6591         my $type;
6592
6593         # - hash or hash_base alone
6594         if ($hash || ($hash_base && !defined $file_name)) {
6595                 my $object_id = $hash || $hash_base;
6596
6597                 open my $fd, "-|", quote_command(
6598                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6599                         or die_error(404, "Object does not exist");
6600                 $type = <$fd>;
6601                 chomp $type;
6602                 close $fd
6603                         or die_error(404, "Object does not exist");
6604
6605         # - hash_base and file_name
6606         } elsif ($hash_base && defined $file_name) {
6607                 $file_name =~ s,/+$,,;
6608
6609                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6610                         or die_error(404, "Base object does not exist");
6611
6612                 # here errors should not hapen
6613                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6614                         or die_error(500, "Open git-ls-tree failed");
6615                 my $line = <$fd>;
6616                 close $fd;
6617
6618                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6619                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6620                         die_error(404, "File or directory for given base does not exist");
6621                 }
6622                 $type = $2;
6623                 $hash = $3;
6624         } else {
6625                 die_error(400, "Not enough information to find object");
6626         }
6627
6628         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6629                                           hash=>$hash, hash_base=>$hash_base,
6630                                           file_name=>$file_name),
6631                              -status => '302 Found');
6632 }
6633
6634 sub git_blobdiff {
6635         my $format = shift || 'html';
6636
6637         my $fd;
6638         my @difftree;
6639         my %diffinfo;
6640         my $expires;
6641
6642         # preparing $fd and %diffinfo for git_patchset_body
6643         # new style URI
6644         if (defined $hash_base && defined $hash_parent_base) {
6645                 if (defined $file_name) {
6646                         # read raw output
6647                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6648                                 $hash_parent_base, $hash_base,
6649                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6650                                 or die_error(500, "Open git-diff-tree failed");
6651                         @difftree = map { chomp; $_ } <$fd>;
6652                         close $fd
6653                                 or die_error(404, "Reading git-diff-tree failed");
6654                         @difftree
6655                                 or die_error(404, "Blob diff not found");
6656
6657                 } elsif (defined $hash &&
6658                          $hash =~ /[0-9a-fA-F]{40}/) {
6659                         # try to find filename from $hash
6660
6661                         # read filtered raw output
6662                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6663                                 $hash_parent_base, $hash_base, "--"
6664                                 or die_error(500, "Open git-diff-tree failed");
6665                         @difftree =
6666                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6667                                 # $hash == to_id
6668                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6669                                 map { chomp; $_ } <$fd>;
6670                         close $fd
6671                                 or die_error(404, "Reading git-diff-tree failed");
6672                         @difftree
6673                                 or die_error(404, "Blob diff not found");
6674
6675                 } else {
6676                         die_error(400, "Missing one of the blob diff parameters");
6677                 }
6678
6679                 if (@difftree > 1) {
6680                         die_error(400, "Ambiguous blob diff specification");
6681                 }
6682
6683                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6684                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6685                 $file_name   ||= $diffinfo{'to_file'};
6686
6687                 $hash_parent ||= $diffinfo{'from_id'};
6688                 $hash        ||= $diffinfo{'to_id'};
6689
6690                 # non-textual hash id's can be cached
6691                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6692                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6693                         $expires = '+1d';
6694                 }
6695
6696                 # open patch output
6697                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6698                         '-p', ($format eq 'html' ? "--full-index" : ()),
6699                         $hash_parent_base, $hash_base,
6700                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6701                         or die_error(500, "Open git-diff-tree failed");
6702         }
6703
6704         # old/legacy style URI -- not generated anymore since 1.4.3.
6705         if (!%diffinfo) {
6706                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6707         }
6708
6709         # header
6710         if ($format eq 'html') {
6711                 my $formats_nav =
6712                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6713                                 "raw");
6714                 git_header_html(undef, $expires);
6715                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6716                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6717                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6718                 } else {
6719                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6720                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6721                 }
6722                 if (defined $file_name) {
6723                         git_print_page_path($file_name, "blob", $hash_base);
6724                 } else {
6725                         print "<div class=\"page_path\"></div>\n";
6726                 }
6727
6728         } elsif ($format eq 'plain') {
6729                 print $cgi->header(
6730                         -type => 'text/plain',
6731                         -charset => 'utf-8',
6732                         -expires => $expires,
6733                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6734
6735                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6736
6737         } else {
6738                 die_error(400, "Unknown blobdiff format");
6739         }
6740
6741         # patch
6742         if ($format eq 'html') {
6743                 print "<div class=\"page_body\">\n";
6744
6745                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6746                 close $fd;
6747
6748                 print "</div>\n"; # class="page_body"
6749                 git_footer_html();
6750
6751         } else {
6752                 while (my $line = <$fd>) {
6753                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6754                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6755
6756                         print $line;
6757
6758                         last if $line =~ m!^\+\+\+!;
6759                 }
6760                 local $/ = undef;
6761                 print <$fd>;
6762                 close $fd;
6763         }
6764 }
6765
6766 sub git_blobdiff_plain {
6767         git_blobdiff('plain');
6768 }
6769
6770 sub git_commitdiff {
6771         my %params = @_;
6772         my $format = $params{-format} || 'html';
6773
6774         my ($patch_max) = gitweb_get_feature('patches');
6775         if ($format eq 'patch') {
6776                 die_error(403, "Patch view not allowed") unless $patch_max;
6777         }
6778
6779         $hash ||= $hash_base || "HEAD";
6780         my %co = parse_commit($hash)
6781             or die_error(404, "Unknown commit object");
6782
6783         # choose format for commitdiff for merge
6784         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6785                 $hash_parent = '--cc';
6786         }
6787         # we need to prepare $formats_nav before almost any parameter munging
6788         my $formats_nav;
6789         if ($format eq 'html') {
6790                 $formats_nav =
6791                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6792                                 "raw");
6793                 if ($patch_max && @{$co{'parents'}} <= 1) {
6794                         $formats_nav .= " | " .
6795                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6796                                         "patch");
6797                 }
6798
6799                 if (defined $hash_parent &&
6800                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6801                         # commitdiff with two commits given
6802                         my $hash_parent_short = $hash_parent;
6803                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6804                                 $hash_parent_short = substr($hash_parent, 0, 7);
6805                         }
6806                         $formats_nav .=
6807                                 ' (from';
6808                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6809                                 if ($co{'parents'}[$i] eq $hash_parent) {
6810                                         $formats_nav .= ' parent ' . ($i+1);
6811                                         last;
6812                                 }
6813                         }
6814                         $formats_nav .= ': ' .
6815                                 $cgi->a({-href => href(action=>"commitdiff",
6816                                                        hash=>$hash_parent)},
6817                                         esc_html($hash_parent_short)) .
6818                                 ')';
6819                 } elsif (!$co{'parent'}) {
6820                         # --root commitdiff
6821                         $formats_nav .= ' (initial)';
6822                 } elsif (scalar @{$co{'parents'}} == 1) {
6823                         # single parent commit
6824                         $formats_nav .=
6825                                 ' (parent: ' .
6826                                 $cgi->a({-href => href(action=>"commitdiff",
6827                                                        hash=>$co{'parent'})},
6828                                         esc_html(substr($co{'parent'}, 0, 7))) .
6829                                 ')';
6830                 } else {
6831                         # merge commit
6832                         if ($hash_parent eq '--cc') {
6833                                 $formats_nav .= ' | ' .
6834                                         $cgi->a({-href => href(action=>"commitdiff",
6835                                                                hash=>$hash, hash_parent=>'-c')},
6836                                                 'combined');
6837                         } else { # $hash_parent eq '-c'
6838                                 $formats_nav .= ' | ' .
6839                                         $cgi->a({-href => href(action=>"commitdiff",
6840                                                                hash=>$hash, hash_parent=>'--cc')},
6841                                                 'compact');
6842                         }
6843                         $formats_nav .=
6844                                 ' (merge: ' .
6845                                 join(' ', map {
6846                                         $cgi->a({-href => href(action=>"commitdiff",
6847                                                                hash=>$_)},
6848                                                 esc_html(substr($_, 0, 7)));
6849                                 } @{$co{'parents'}} ) .
6850                                 ')';
6851                 }
6852         }
6853
6854         my $hash_parent_param = $hash_parent;
6855         if (!defined $hash_parent_param) {
6856                 # --cc for multiple parents, --root for parentless
6857                 $hash_parent_param =
6858                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6859         }
6860
6861         # read commitdiff
6862         my $fd;
6863         my @difftree;
6864         if ($format eq 'html') {
6865                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6866                         "--no-commit-id", "--patch-with-raw", "--full-index",
6867                         $hash_parent_param, $hash, "--"
6868                         or die_error(500, "Open git-diff-tree failed");
6869
6870                 while (my $line = <$fd>) {
6871                         chomp $line;
6872                         # empty line ends raw part of diff-tree output
6873                         last unless $line;
6874                         push @difftree, scalar parse_difftree_raw_line($line);
6875                 }
6876
6877         } elsif ($format eq 'plain') {
6878                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6879                         '-p', $hash_parent_param, $hash, "--"
6880                         or die_error(500, "Open git-diff-tree failed");
6881         } elsif ($format eq 'patch') {
6882                 # For commit ranges, we limit the output to the number of
6883                 # patches specified in the 'patches' feature.
6884                 # For single commits, we limit the output to a single patch,
6885                 # diverging from the git-format-patch default.
6886                 my @commit_spec = ();
6887                 if ($hash_parent) {
6888                         if ($patch_max > 0) {
6889                                 push @commit_spec, "-$patch_max";
6890                         }
6891                         push @commit_spec, '-n', "$hash_parent..$hash";
6892                 } else {
6893                         if ($params{-single}) {
6894                                 push @commit_spec, '-1';
6895                         } else {
6896                                 if ($patch_max > 0) {
6897                                         push @commit_spec, "-$patch_max";
6898                                 }
6899                                 push @commit_spec, "-n";
6900                         }
6901                         push @commit_spec, '--root', $hash;
6902                 }
6903                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6904                         '--encoding=utf8', '--stdout', @commit_spec
6905                         or die_error(500, "Open git-format-patch failed");
6906         } else {
6907                 die_error(400, "Unknown commitdiff format");
6908         }
6909
6910         # non-textual hash id's can be cached
6911         my $expires;
6912         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6913                 $expires = "+1d";
6914         }
6915
6916         # write commit message
6917         if ($format eq 'html') {
6918                 my $refs = git_get_references();
6919                 my $ref = format_ref_marker($refs, $co{'id'});
6920
6921                 git_header_html(undef, $expires);
6922                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6923                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6924                 print "<div class=\"title_text\">\n" .
6925                       "<table class=\"object_header\">\n";
6926                 git_print_authorship_rows(\%co);
6927                 print "</table>".
6928                       "</div>\n";
6929                 print "<div class=\"page_body\">\n";
6930                 if (@{$co{'comment'}} > 1) {
6931                         print "<div class=\"log\">\n";
6932                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6933                         print "</div>\n"; # class="log"
6934                 }
6935
6936         } elsif ($format eq 'plain') {
6937                 my $refs = git_get_references("tags");
6938                 my $tagname = git_get_rev_name_tags($hash);
6939                 my $filename = basename($project) . "-$hash.patch";
6940
6941                 print $cgi->header(
6942                         -type => 'text/plain',
6943                         -charset => 'utf-8',
6944                         -expires => $expires,
6945                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6946                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6947                 print "From: " . to_utf8($co{'author'}) . "\n";
6948                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6949                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6950
6951                 print "X-Git-Tag: $tagname\n" if $tagname;
6952                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6953
6954                 foreach my $line (@{$co{'comment'}}) {
6955                         print to_utf8($line) . "\n";
6956                 }
6957                 print "---\n\n";
6958         } elsif ($format eq 'patch') {
6959                 my $filename = basename($project) . "-$hash.patch";
6960
6961                 print $cgi->header(
6962                         -type => 'text/plain',
6963                         -charset => 'utf-8',
6964                         -expires => $expires,
6965                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6966         }
6967
6968         # write patch
6969         if ($format eq 'html') {
6970                 my $use_parents = !defined $hash_parent ||
6971                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6972                 git_difftree_body(\@difftree, $hash,
6973                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6974                 print "<br/>\n";
6975
6976                 git_patchset_body($fd, \@difftree, $hash,
6977                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6978                 close $fd;
6979                 print "</div>\n"; # class="page_body"
6980                 git_footer_html();
6981
6982         } elsif ($format eq 'plain') {
6983                 local $/ = undef;
6984                 print <$fd>;
6985                 close $fd
6986                         or print "Reading git-diff-tree failed\n";
6987         } elsif ($format eq 'patch') {
6988                 local $/ = undef;
6989                 print <$fd>;
6990                 close $fd
6991                         or print "Reading git-format-patch failed\n";
6992         }
6993 }
6994
6995 sub git_commitdiff_plain {
6996         git_commitdiff(-format => 'plain');
6997 }
6998
6999 # format-patch-style patches
7000 sub git_patch {
7001         git_commitdiff(-format => 'patch', -single => 1);
7002 }
7003
7004 sub git_patches {
7005         git_commitdiff(-format => 'patch');
7006 }
7007
7008 sub git_history {
7009         git_log_generic('history', \&git_history_body,
7010                         $hash_base, $hash_parent_base,
7011                         $file_name, $hash);
7012 }
7013
7014 sub git_search {
7015         gitweb_check_feature('search') or die_error(403, "Search is disabled");
7016         if (!defined $searchtext) {
7017                 die_error(400, "Text field is empty");
7018         }
7019         if (!defined $hash) {
7020                 $hash = git_get_head_hash($project);
7021         }
7022         my %co = parse_commit($hash);
7023         if (!%co) {
7024                 die_error(404, "Unknown commit object");
7025         }
7026         if (!defined $page) {
7027                 $page = 0;
7028         }
7029
7030         $searchtype ||= 'commit';
7031         if ($searchtype eq 'pickaxe') {
7032                 # pickaxe may take all resources of your box and run for several minutes
7033                 # with every query - so decide by yourself how public you make this feature
7034                 gitweb_check_feature('pickaxe')
7035                     or die_error(403, "Pickaxe is disabled");
7036         }
7037         if ($searchtype eq 'grep') {
7038                 gitweb_check_feature('grep')[0]
7039                     or die_error(403, "Grep is disabled");
7040         }
7041
7042         git_header_html();
7043
7044         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
7045                 my $greptype;
7046                 if ($searchtype eq 'commit') {
7047                         $greptype = "--grep=";
7048                 } elsif ($searchtype eq 'author') {
7049                         $greptype = "--author=";
7050                 } elsif ($searchtype eq 'committer') {
7051                         $greptype = "--committer=";
7052                 }
7053                 $greptype .= $searchtext;
7054                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7055                                                $greptype, '--regexp-ignore-case',
7056                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7057
7058                 my $paging_nav = '';
7059                 if ($page > 0) {
7060                         $paging_nav .=
7061                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
7062                                                        searchtext=>$searchtext,
7063                                                        searchtype=>$searchtype)},
7064                                         "first");
7065                         $paging_nav .= " &sdot; " .
7066                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
7067                                          -accesskey => "p", -title => "Alt-p"}, "prev");
7068                 } else {
7069                         $paging_nav .= "first";
7070                         $paging_nav .= " &sdot; prev";
7071                 }
7072                 my $next_link = '';
7073                 if ($#commitlist >= 100) {
7074                         $next_link =
7075                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7076                                          -accesskey => "n", -title => "Alt-n"}, "next");
7077                         $paging_nav .= " &sdot; $next_link";
7078                 } else {
7079                         $paging_nav .= " &sdot; next";
7080                 }
7081
7082                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7083                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7084                 if ($page == 0 && !@commitlist) {
7085                         print "<p>No match.</p>\n";
7086                 } else {
7087                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7088                 }
7089         }
7090
7091         if ($searchtype eq 'pickaxe') {
7092                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7093                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7094
7095                 print "<table class=\"pickaxe search\">\n";
7096                 my $alternate = 1;
7097                 local $/ = "\n";
7098                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7099                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7100                         ($search_use_regexp ? '--pickaxe-regex' : ());
7101                 undef %co;
7102                 my @files;
7103                 while (my $line = <$fd>) {
7104                         chomp $line;
7105                         next unless $line;
7106
7107                         my %set = parse_difftree_raw_line($line);
7108                         if (defined $set{'commit'}) {
7109                                 # finish previous commit
7110                                 if (%co) {
7111                                         print "</td>\n" .
7112                                               "<td class=\"link\">" .
7113                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7114                                               " | " .
7115                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7116                                         print "</td>\n" .
7117                                               "</tr>\n";
7118                                 }
7119
7120                                 if ($alternate) {
7121                                         print "<tr class=\"dark\">\n";
7122                                 } else {
7123                                         print "<tr class=\"light\">\n";
7124                                 }
7125                                 $alternate ^= 1;
7126                                 %co = parse_commit($set{'commit'});
7127                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7128                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7129                                       "<td><i>$author</i></td>\n" .
7130                                       "<td>" .
7131                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7132                                               -class => "list subject"},
7133                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7134                         } elsif (defined $set{'to_id'}) {
7135                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7136
7137                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7138                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7139                                               -class => "list"},
7140                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7141                                       "<br/>\n";
7142                         }
7143                 }
7144                 close $fd;
7145
7146                 # finish last commit (warning: repetition!)
7147                 if (%co) {
7148                         print "</td>\n" .
7149                               "<td class=\"link\">" .
7150                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7151                               " | " .
7152                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7153                         print "</td>\n" .
7154                               "</tr>\n";
7155                 }
7156
7157                 print "</table>\n";
7158         }
7159
7160         if ($searchtype eq 'grep') {
7161                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7162                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7163
7164                 print "<table class=\"grep_search\">\n";
7165                 my $alternate = 1;
7166                 my $matches = 0;
7167                 local $/ = "\n";
7168                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7169                         $search_use_regexp ? ('-E', '-i') : '-F',
7170                         $searchtext, $co{'tree'};
7171                 my $lastfile = '';
7172                 while (my $line = <$fd>) {
7173                         chomp $line;
7174                         my ($file, $lno, $ltext, $binary);
7175                         last if ($matches++ > 1000);
7176                         if ($line =~ /^Binary file (.+) matches$/) {
7177                                 $file = $1;
7178                                 $binary = 1;
7179                         } else {
7180                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7181                         }
7182                         if ($file ne $lastfile) {
7183                                 $lastfile and print "</td></tr>\n";
7184                                 if ($alternate++) {
7185                                         print "<tr class=\"dark\">\n";
7186                                 } else {
7187                                         print "<tr class=\"light\">\n";
7188                                 }
7189                                 print "<td class=\"list\">".
7190                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7191                                                                file_name=>"$file"),
7192                                                 -class => "list"}, esc_path($file));
7193                                 print "</td><td>\n";
7194                                 $lastfile = $file;
7195                         }
7196                         if ($binary) {
7197                                 print "<div class=\"binary\">Binary file</div>\n";
7198                         } else {
7199                                 $ltext = untabify($ltext);
7200                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7201                                         $ltext = esc_html($1, -nbsp=>1);
7202                                         $ltext .= '<span class="match">';
7203                                         $ltext .= esc_html($2, -nbsp=>1);
7204                                         $ltext .= '</span>';
7205                                         $ltext .= esc_html($3, -nbsp=>1);
7206                                 } else {
7207                                         $ltext = esc_html($ltext, -nbsp=>1);
7208                                 }
7209                                 print "<div class=\"pre\">" .
7210                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7211                                                                file_name=>"$file").'#l'.$lno,
7212                                                 -class => "linenr"}, sprintf('%4i', $lno))
7213                                         . ' ' .  $ltext . "</div>\n";
7214                         }
7215                 }
7216                 if ($lastfile) {
7217                         print "</td></tr>\n";
7218                         if ($matches > 1000) {
7219                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7220                         }
7221                 } else {
7222                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7223                 }
7224                 close $fd;
7225
7226                 print "</table>\n";
7227         }
7228         git_footer_html();
7229 }
7230
7231 sub git_search_help {
7232         git_header_html();
7233         git_print_page_nav('','', $hash,$hash,$hash);
7234         print <<EOT;
7235 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7236 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7237 the pattern entered is recognized as the POSIX extended
7238 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7239 insensitive).</p>
7240 <dl>
7241 <dt><b>commit</b></dt>
7242 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7243 EOT
7244         my $have_grep = gitweb_check_feature('grep');
7245         if ($have_grep) {
7246                 print <<EOT;
7247 <dt><b>grep</b></dt>
7248 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7249     a different one) are searched for the given pattern. On large trees, this search can take
7250 a while and put some strain on the server, so please use it with some consideration. Note that
7251 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7252 case-sensitive.</dd>
7253 EOT
7254         }
7255         print <<EOT;
7256 <dt><b>author</b></dt>
7257 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7258 <dt><b>committer</b></dt>
7259 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7260 EOT
7261         my $have_pickaxe = gitweb_check_feature('pickaxe');
7262         if ($have_pickaxe) {
7263                 print <<EOT;
7264 <dt><b>pickaxe</b></dt>
7265 <dd>All commits that caused the string to appear or disappear from any file (changes that
7266 added, removed or "modified" the string) will be listed. This search can take a while and
7267 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7268 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7269 EOT
7270         }
7271         print "</dl>\n";
7272         git_footer_html();
7273 }
7274
7275 sub git_shortlog {
7276         git_log_generic('shortlog', \&git_shortlog_body,
7277                         $hash, $hash_parent);
7278 }
7279
7280 ## ......................................................................
7281 ## feeds (RSS, Atom; OPML)
7282
7283 sub git_feed {
7284         my $format = shift || 'atom';
7285         my $have_blame = gitweb_check_feature('blame');
7286
7287         # Atom: http://www.atomenabled.org/developers/syndication/
7288         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7289         if ($format ne 'rss' && $format ne 'atom') {
7290                 die_error(400, "Unknown web feed format");
7291         }
7292
7293         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7294         my $head = $hash || 'HEAD';
7295         my @commitlist = parse_commits($head, 150, 0, $file_name);
7296
7297         my %latest_commit;
7298         my %latest_date;
7299         my $content_type = "application/$format+xml";
7300         if (defined $cgi->http('HTTP_ACCEPT') &&
7301                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7302                 # browser (feed reader) prefers text/xml
7303                 $content_type = 'text/xml';
7304         }
7305         if (defined($commitlist[0])) {
7306                 %latest_commit = %{$commitlist[0]};
7307                 my $latest_epoch = $latest_commit{'committer_epoch'};
7308                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7309                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7310                 if (defined $if_modified) {
7311                         my $since;
7312                         if (eval { require HTTP::Date; 1; }) {
7313                                 $since = HTTP::Date::str2time($if_modified);
7314                         } elsif (eval { require Time::ParseDate; 1; }) {
7315                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7316                         }
7317                         if (defined $since && $latest_epoch <= $since) {
7318                                 print $cgi->header(
7319                                         -type => $content_type,
7320                                         -charset => 'utf-8',
7321                                         -last_modified => $latest_date{'rfc2822'},
7322                                         -status => '304 Not Modified');
7323                                 return;
7324                         }
7325                 }
7326                 print $cgi->header(
7327                         -type => $content_type,
7328                         -charset => 'utf-8',
7329                         -last_modified => $latest_date{'rfc2822'});
7330         } else {
7331                 print $cgi->header(
7332                         -type => $content_type,
7333                         -charset => 'utf-8');
7334         }
7335
7336         # Optimization: skip generating the body if client asks only
7337         # for Last-Modified date.
7338         return if ($cgi->request_method() eq 'HEAD');
7339
7340         # header variables
7341         my $title = "$site_name - $project/$action";
7342         my $feed_type = 'log';
7343         if (defined $hash) {
7344                 $title .= " - '$hash'";
7345                 $feed_type = 'branch log';
7346                 if (defined $file_name) {
7347                         $title .= " :: $file_name";
7348                         $feed_type = 'history';
7349                 }
7350         } elsif (defined $file_name) {
7351                 $title .= " - $file_name";
7352                 $feed_type = 'history';
7353         }
7354         $title .= " $feed_type";
7355         my $descr = git_get_project_description($project);
7356         if (defined $descr) {
7357                 $descr = esc_html($descr);
7358         } else {
7359                 $descr = "$project " .
7360                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7361                          " feed";
7362         }
7363         my $owner = git_get_project_owner($project);
7364         $owner = esc_html($owner);
7365
7366         #header
7367         my $alt_url;
7368         if (defined $file_name) {
7369                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7370         } elsif (defined $hash) {
7371                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7372         } else {
7373                 $alt_url = href(-full=>1, action=>"summary");
7374         }
7375         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7376         if ($format eq 'rss') {
7377                 print <<XML;
7378 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7379 <channel>
7380 XML
7381                 print "<title>$title</title>\n" .
7382                       "<link>$alt_url</link>\n" .
7383                       "<description>$descr</description>\n" .
7384                       "<language>en</language>\n" .
7385                       # project owner is responsible for 'editorial' content
7386                       "<managingEditor>$owner</managingEditor>\n";
7387                 if (defined $logo || defined $favicon) {
7388                         # prefer the logo to the favicon, since RSS
7389                         # doesn't allow both
7390                         my $img = esc_url($logo || $favicon);
7391                         print "<image>\n" .
7392                               "<url>$img</url>\n" .
7393                               "<title>$title</title>\n" .
7394                               "<link>$alt_url</link>\n" .
7395                               "</image>\n";
7396                 }
7397                 if (%latest_date) {
7398                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7399                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7400                 }
7401                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7402         } elsif ($format eq 'atom') {
7403                 print <<XML;
7404 <feed xmlns="http://www.w3.org/2005/Atom">
7405 XML
7406                 print "<title>$title</title>\n" .
7407                       "<subtitle>$descr</subtitle>\n" .
7408                       '<link rel="alternate" type="text/html" href="' .
7409                       $alt_url . '" />' . "\n" .
7410                       '<link rel="self" type="' . $content_type . '" href="' .
7411                       $cgi->self_url() . '" />' . "\n" .
7412                       "<id>" . href(-full=>1) . "</id>\n" .
7413                       # use project owner for feed author
7414                       "<author><name>$owner</name></author>\n";
7415                 if (defined $favicon) {
7416                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7417                 }
7418                 if (defined $logo) {
7419                         # not twice as wide as tall: 72 x 27 pixels
7420                         print "<logo>" . esc_url($logo) . "</logo>\n";
7421                 }
7422                 if (! %latest_date) {
7423                         # dummy date to keep the feed valid until commits trickle in:
7424                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7425                 } else {
7426                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7427                 }
7428                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7429         }
7430
7431         # contents
7432         for (my $i = 0; $i <= $#commitlist; $i++) {
7433                 my %co = %{$commitlist[$i]};
7434                 my $commit = $co{'id'};
7435                 # we read 150, we always show 30 and the ones more recent than 48 hours
7436                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7437                         last;
7438                 }
7439                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7440
7441                 # get list of changed files
7442                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7443                         $co{'parent'} || "--root",
7444                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7445                         or next;
7446                 my @difftree = map { chomp; $_ } <$fd>;
7447                 close $fd
7448                         or next;
7449
7450                 # print element (entry, item)
7451                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7452                 if ($format eq 'rss') {
7453                         print "<item>\n" .
7454                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7455                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7456                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7457                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7458                               "<link>$co_url</link>\n" .
7459                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7460                               "<content:encoded>" .
7461                               "<![CDATA[\n";
7462                 } elsif ($format eq 'atom') {
7463                         print "<entry>\n" .
7464                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7465                               "<updated>$cd{'iso-8601'}</updated>\n" .
7466                               "<author>\n" .
7467                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7468                         if ($co{'author_email'}) {
7469                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7470                         }
7471                         print "</author>\n" .
7472                               # use committer for contributor
7473                               "<contributor>\n" .
7474                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7475                         if ($co{'committer_email'}) {
7476                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7477                         }
7478                         print "</contributor>\n" .
7479                               "<published>$cd{'iso-8601'}</published>\n" .
7480                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7481                               "<id>$co_url</id>\n" .
7482                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7483                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7484                 }
7485                 my $comment = $co{'comment'};
7486                 print "<pre>\n";
7487                 foreach my $line (@$comment) {
7488                         $line = esc_html($line);
7489                         print "$line\n";
7490                 }
7491                 print "</pre><ul>\n";
7492                 foreach my $difftree_line (@difftree) {
7493                         my %difftree = parse_difftree_raw_line($difftree_line);
7494                         next if !$difftree{'from_id'};
7495
7496                         my $file = $difftree{'file'} || $difftree{'to_file'};
7497
7498                         print "<li>" .
7499                               "[" .
7500                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7501                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7502                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7503                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7504                                       -title => "diff"}, 'D');
7505                         if ($have_blame) {
7506                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7507                                                              file_name=>$file, hash_base=>$commit),
7508                                               -title => "blame"}, 'B');
7509                         }
7510                         # if this is not a feed of a file history
7511                         if (!defined $file_name || $file_name ne $file) {
7512                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7513                                                              file_name=>$file, hash=>$commit),
7514                                               -title => "history"}, 'H');
7515                         }
7516                         $file = esc_path($file);
7517                         print "] ".
7518                               "$file</li>\n";
7519                 }
7520                 if ($format eq 'rss') {
7521                         print "</ul>]]>\n" .
7522                               "</content:encoded>\n" .
7523                               "</item>\n";
7524                 } elsif ($format eq 'atom') {
7525                         print "</ul>\n</div>\n" .
7526                               "</content>\n" .
7527                               "</entry>\n";
7528                 }
7529         }
7530
7531         # end of feed
7532         if ($format eq 'rss') {
7533                 print "</channel>\n</rss>\n";
7534         } elsif ($format eq 'atom') {
7535                 print "</feed>\n";
7536         }
7537 }
7538
7539 sub git_rss {
7540         git_feed('rss');
7541 }
7542
7543 sub git_atom {
7544         git_feed('atom');
7545 }
7546
7547 sub git_opml {
7548         my @list = git_get_projects_list();
7549         if (!@list) {
7550                 die_error(404, "No projects found");
7551         }
7552
7553         print $cgi->header(
7554                 -type => 'text/xml',
7555                 -charset => 'utf-8',
7556                 -content_disposition => 'inline; filename="opml.xml"');
7557
7558         print <<XML;
7559 <?xml version="1.0" encoding="utf-8"?>
7560 <opml version="1.0">
7561 <head>
7562   <title>$site_name OPML Export</title>
7563 </head>
7564 <body>
7565 <outline text="git RSS feeds">
7566 XML
7567
7568         foreach my $pr (@list) {
7569                 my %proj = %$pr;
7570                 my $head = git_get_head_hash($proj{'path'});
7571                 if (!defined $head) {
7572                         next;
7573                 }
7574                 $git_dir = "$projectroot/$proj{'path'}";
7575                 my %co = parse_commit($head);
7576                 if (!%co) {
7577                         next;
7578                 }
7579
7580                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7581                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7582                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7583                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7584         }
7585         print <<XML;
7586 </outline>
7587 </body>
7588 </opml>
7589 XML
7590 }