gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99 # URI of GIT logo (72x27 size)
 100 our $logo = "++GITWEB_LOGO++";
 101 # URI of GIT favicon, assumed to be image/png type
 102 our $favicon = "++GITWEB_FAVICON++";
 103 # URI of gitweb.js (JavaScript code for gitweb)
 104 our $javascript = "++GITWEB_JS++";
 105
 106 # URI and label (title) of GIT logo link
 107 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 108 #our $logo_label = "git documentation";
 109 our $logo_url = "http://git-scm.com/";
 110 our $logo_label = "git homepage";
 111
 112 # source of projects list
 113 our $projects_list = "++GITWEB_LIST++";
 114
 115 # the width (in characters) of the projects list "Description" column
 116 our $projects_list_description_width = 25;
 117
 118 # group projects by category on the projects list
 119 # (enabled if this variable evaluates to true)
 120 our $projects_list_group_categories = 0;
 121
 122 # default category if none specified
 123 # (leave the empty string for no category)
 124 our $project_list_default_category = "";
 125
 126 # default order of projects list
 127 # valid values are none, project, descr, owner, and age
 128 our $default_projects_order = "project";
 129
 130 # show repository only if this file exists
 131 # (only effective if this variable evaluates to true)
 132 our $export_ok = "++GITWEB_EXPORT_OK++";
 133
 134 # show repository only if this subroutine returns true
 135 # when given the path to the project, for example:
 136 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 137 our $export_auth_hook = undef;
 138
 139 # only allow viewing of repositories also shown on the overview page
 140 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 141
 142 # list of git base URLs used for URL to where fetch project from,
 143 # i.e. full URL is "$git_base_url/$project"
 144 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 145
 146 # default blob_plain mimetype and default charset for text/plain blob
 147 our $default_blob_plain_mimetype = 'text/plain';
 148 our $default_text_plain_charset  = undef;
 149
 150 # file to use for guessing MIME types before trying /etc/mime.types
 151 # (relative to the current git repository)
 152 our $mimetypes_file = undef;
 153
 154 # assume this charset if line contains non-UTF-8 characters;
 155 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 156 # for which encoding all byte sequences are valid, for example
 157 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 158 # could be even 'utf-8' for the old behavior)
 159 our $fallback_encoding = 'latin1';
 160
 161 # rename detection options for git-diff and git-diff-tree
 162 # - default is '-M', with the cost proportional to
 163 #   (number of removed files) * (number of new files).
 164 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 165 #   (number of changed files + number of removed files) * (number of new files)
 166 # - even more costly is '-C', '--find-copies-harder' with cost
 167 #   (number of files in the original tree) * (number of new files)
 168 # - one might want to include '-B' option, e.g. '-B', '-M'
 169 our @diff_opts = ('-M'); # taken from git_commit
 170
 171 # Disables features that would allow repository owners to inject script into
 172 # the gitweb domain.
 173 our $prevent_xss = 0;
 174
 175 # Path to the highlight executable to use (must be the one from
 176 # http://www.andre-simon.de due to assumptions about parameters and output).
 177 # Useful if highlight is not installed on your webserver's PATH.
 178 # [Default: highlight]
 179 our $highlight_bin = "++HIGHLIGHT_BIN++";
 180
 181 # information about snapshot formats that gitweb is capable of serving
 182 our %known_snapshot_formats = (
 183         # name => {
 184         #       'display' => display name,
 185         #       'type' => mime type,
 186         #       'suffix' => filename suffix,
 187         #       'format' => --format for git-archive,
 188         #       'compressor' => [compressor command and arguments]
 189         #                       (array reference, optional)
 190         #       'disabled' => boolean (optional)}
 191         #
 192         'tgz' => {
 193                 'display' => 'tar.gz',
 194                 'type' => 'application/x-gzip',
 195                 'suffix' => '.tar.gz',
 196                 'format' => 'tar',
 197                 'compressor' => ['gzip', '-n']},
 198
 199         'tbz2' => {
 200                 'display' => 'tar.bz2',
 201                 'type' => 'application/x-bzip2',
 202                 'suffix' => '.tar.bz2',
 203                 'format' => 'tar',
 204                 'compressor' => ['bzip2']},
 205
 206         'txz' => {
 207                 'display' => 'tar.xz',
 208                 'type' => 'application/x-xz',
 209                 'suffix' => '.tar.xz',
 210                 'format' => 'tar',
 211                 'compressor' => ['xz'],
 212                 'disabled' => 1},
 213
 214         'zip' => {
 215                 'display' => 'zip',
 216                 'type' => 'application/x-zip',
 217                 'suffix' => '.zip',
 218                 'format' => 'zip'},
 219 );
 220
 221 # Aliases so we understand old gitweb.snapshot values in repository
 222 # configuration.
 223 our %known_snapshot_format_aliases = (
 224         'gzip'  => 'tgz',
 225         'bzip2' => 'tbz2',
 226         'xz'    => 'txz',
 227
 228         # backward compatibility: legacy gitweb config support
 229         'x-gzip' => undef, 'gz' => undef,
 230         'x-bzip2' => undef, 'bz2' => undef,
 231         'x-zip' => undef, '' => undef,
 232 );
 233
 234 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 235 # are changed, it may be appropriate to change these values too via
 236 # $GITWEB_CONFIG.
 237 our %avatar_size = (
 238         'default' => 16,
 239         'double'  => 32
 240 );
 241
 242 # Used to set the maximum load that we will still respond to gitweb queries.
 243 # If server load exceed this value then return "503 server busy" error.
 244 # If gitweb cannot determined server load, it is taken to be 0.
 245 # Leave it undefined (or set to 'undef') to turn off load checking.
 246 our $maxload = 300;
 247
 248 # configuration for 'highlight' (http://www.andre-simon.de/)
 249 # match by basename
 250 our %highlight_basename = (
 251         #'Program' => 'py',
 252         #'Library' => 'py',
 253         'SConstruct' => 'py', # SCons equivalent of Makefile
 254         'Makefile' => 'make',
 255 );
 256 # match by extension
 257 our %highlight_ext = (
 258         # main extensions, defining name of syntax;
 259         # see files in /usr/share/highlight/langDefs/ directory
 260         map { $_ => $_ }
 261                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 262         # alternate extensions, see /etc/highlight/filetypes.conf
 263         'h' => 'c',
 264         map { $_ => 'sh'  } qw(bash zsh ksh),
 265         map { $_ => 'cpp' } qw(cxx c++ cc),
 266         map { $_ => 'php' } qw(php3 php4 php5 phps),
 267         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 268         map { $_ => 'make'} qw(mak mk),
 269         map { $_ => 'xml' } qw(xhtml html htm),
 270 );
 271
 272 # You define site-wide feature defaults here; override them with
 273 # $GITWEB_CONFIG as necessary.
 274 our %feature = (
 275         # feature => {
 276         #       'sub' => feature-sub (subroutine),
 277         #       'override' => allow-override (boolean),
 278         #       'default' => [ default options...] (array reference)}
 279         #
 280         # if feature is overridable (it means that allow-override has true value),
 281         # then feature-sub will be called with default options as parameters;
 282         # return value of feature-sub indicates if to enable specified feature
 283         #
 284         # if there is no 'sub' key (no feature-sub), then feature cannot be
 285         # overridden
 286         #
 287         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 288         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 289         # is enabled
 290
 291         # Enable the 'blame' blob view, showing the last commit that modified
 292         # each line in the file. This can be very CPU-intensive.
 293
 294         # To enable system wide have in $GITWEB_CONFIG
 295         # $feature{'blame'}{'default'} = [1];
 296         # To have project specific config enable override in $GITWEB_CONFIG
 297         # $feature{'blame'}{'override'} = 1;
 298         # and in project config gitweb.blame = 0|1;
 299         'blame' => {
 300                 'sub' => sub { feature_bool('blame', @_) },
 301                 'override' => 0,
 302                 'default' => [0]},
 303
 304         # Enable the 'snapshot' link, providing a compressed archive of any
 305         # tree. This can potentially generate high traffic if you have large
 306         # project.
 307
 308         # Value is a list of formats defined in %known_snapshot_formats that
 309         # you wish to offer.
 310         # To disable system wide have in $GITWEB_CONFIG
 311         # $feature{'snapshot'}{'default'} = [];
 312         # To have project specific config enable override in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'override'} = 1;
 314         # and in project config, a comma-separated list of formats or "none"
 315         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 316         'snapshot' => {
 317                 'sub' => \&feature_snapshot,
 318                 'override' => 0,
 319                 'default' => ['tgz']},
 320
 321         # Enable text search, which will list the commits which match author,
 322         # committer or commit text to a given string.  Enabled by default.
 323         # Project specific override is not supported.
 324         'search' => {
 325                 'override' => 0,
 326                 'default' => [1]},
 327
 328         # Enable grep search, which will list the files in currently selected
 329         # tree containing the given string. Enabled by default. This can be
 330         # potentially CPU-intensive, of course.
 331
 332         # To enable system wide have in $GITWEB_CONFIG
 333         # $feature{'grep'}{'default'} = [1];
 334         # To have project specific config enable override in $GITWEB_CONFIG
 335         # $feature{'grep'}{'override'} = 1;
 336         # and in project config gitweb.grep = 0|1;
 337         'grep' => {
 338                 'sub' => sub { feature_bool('grep', @_) },
 339                 'override' => 0,
 340                 'default' => [1]},
 341
 342         # Enable the pickaxe search, which will list the commits that modified
 343         # a given string in a file. This can be practical and quite faster
 344         # alternative to 'blame', but still potentially CPU-intensive.
 345
 346         # To enable system wide have in $GITWEB_CONFIG
 347         # $feature{'pickaxe'}{'default'} = [1];
 348         # To have project specific config enable override in $GITWEB_CONFIG
 349         # $feature{'pickaxe'}{'override'} = 1;
 350         # and in project config gitweb.pickaxe = 0|1;
 351         'pickaxe' => {
 352                 'sub' => sub { feature_bool('pickaxe', @_) },
 353                 'override' => 0,
 354                 'default' => [1]},
 355
 356         # Enable showing size of blobs in a 'tree' view, in a separate
 357         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 358
 359         # To disable system wide have in $GITWEB_CONFIG
 360         # $feature{'show-sizes'}{'default'} = [0];
 361         # To have project specific config enable override in $GITWEB_CONFIG
 362         # $feature{'show-sizes'}{'override'} = 1;
 363         # and in project config gitweb.showsizes = 0|1;
 364         'show-sizes' => {
 365                 'sub' => sub { feature_bool('showsizes', @_) },
 366                 'override' => 0,
 367                 'default' => [1]},
 368
 369         # Make gitweb use an alternative format of the URLs which can be
 370         # more readable and natural-looking: project name is embedded
 371         # directly in the path and the query string contains other
 372         # auxiliary information. All gitweb installations recognize
 373         # URL in either format; this configures in which formats gitweb
 374         # generates links.
 375
 376         # To enable system wide have in $GITWEB_CONFIG
 377         # $feature{'pathinfo'}{'default'} = [1];
 378         # Project specific override is not supported.
 379
 380         # Note that you will need to change the default location of CSS,
 381         # favicon, logo and possibly other files to an absolute URL. Also,
 382         # if gitweb.cgi serves as your indexfile, you will need to force
 383         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 384         'pathinfo' => {
 385                 'override' => 0,
 386                 'default' => [0]},
 387
 388         # Make gitweb consider projects in project root subdirectories
 389         # to be forks of existing projects. Given project $projname.git,
 390         # projects matching $projname/*.git will not be shown in the main
 391         # projects list, instead a '+' mark will be added to $projname
 392         # there and a 'forks' view will be enabled for the project, listing
 393         # all the forks. If project list is taken from a file, forks have
 394         # to be listed after the main project.
 395
 396         # To enable system wide have in $GITWEB_CONFIG
 397         # $feature{'forks'}{'default'} = [1];
 398         # Project specific override is not supported.
 399         'forks' => {
 400                 'override' => 0,
 401                 'default' => [0]},
 402
 403         # Insert custom links to the action bar of all project pages.
 404         # This enables you mainly to link to third-party scripts integrating
 405         # into gitweb; e.g. git-browser for graphical history representation
 406         # or custom web-based repository administration interface.
 407
 408         # The 'default' value consists of a list of triplets in the form
 409         # (label, link, position) where position is the label after which
 410         # to insert the link and link is a format string where %n expands
 411         # to the project name, %f to the project path within the filesystem,
 412         # %h to the current hash (h gitweb parameter) and %b to the current
 413         # hash base (hb gitweb parameter); %% expands to %.
 414
 415         # To enable system wide have in $GITWEB_CONFIG e.g.
 416         # $feature{'actions'}{'default'} = [('graphiclog',
 417         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 418         # Project specific override is not supported.
 419         'actions' => {
 420                 'override' => 0,
 421                 'default' => []},
 422
 423         # Allow gitweb scan project content tags of project repository,
 424         # and display the popular Web 2.0-ish "tag cloud" near the projects
 425         # list.  Note that this is something COMPLETELY different from the
 426         # normal Git tags.
 427
 428         # gitweb by itself can show existing tags, but it does not handle
 429         # tagging itself; you need to do it externally, outside gitweb.
 430         # The format is described in git_get_project_ctags() subroutine.
 431         # You may want to install the HTML::TagCloud Perl module to get
 432         # a pretty tag cloud instead of just a list of tags.
 433
 434         # To enable system wide have in $GITWEB_CONFIG
 435         # $feature{'ctags'}{'default'} = [1];
 436         # Project specific override is not supported.
 437
 438         # In the future whether ctags editing is enabled might depend
 439         # on the value, but using 1 should always mean no editing of ctags.
 440         'ctags' => {
 441                 'override' => 0,
 442                 'default' => [0]},
 443
 444         # The maximum number of patches in a patchset generated in patch
 445         # view. Set this to 0 or undef to disable patch view, or to a
 446         # negative number to remove any limit.
 447
 448         # To disable system wide have in $GITWEB_CONFIG
 449         # $feature{'patches'}{'default'} = [0];
 450         # To have project specific config enable override in $GITWEB_CONFIG
 451         # $feature{'patches'}{'override'} = 1;
 452         # and in project config gitweb.patches = 0|n;
 453         # where n is the maximum number of patches allowed in a patchset.
 454         'patches' => {
 455                 'sub' => \&feature_patches,
 456                 'override' => 0,
 457                 'default' => [16]},
 458
 459         # Avatar support. When this feature is enabled, views such as
 460         # shortlog or commit will display an avatar associated with
 461         # the email of the committer(s) and/or author(s).
 462
 463         # Currently available providers are gravatar and picon.
 464         # If an unknown provider is specified, the feature is disabled.
 465
 466         # Gravatar depends on Digest::MD5.
 467         # Picon currently relies on the indiana.edu database.
 468
 469         # To enable system wide have in $GITWEB_CONFIG
 470         # $feature{'avatar'}{'default'} = ['<provider>'];
 471         # where <provider> is either gravatar or picon.
 472         # To have project specific config enable override in $GITWEB_CONFIG
 473         # $feature{'avatar'}{'override'} = 1;
 474         # and in project config gitweb.avatar = <provider>;
 475         'avatar' => {
 476                 'sub' => \&feature_avatar,
 477                 'override' => 0,
 478                 'default' => ['']},
 479
 480         # Enable displaying how much time and how many git commands
 481         # it took to generate and display page.  Disabled by default.
 482         # Project specific override is not supported.
 483         'timed' => {
 484                 'override' => 0,
 485                 'default' => [0]},
 486
 487         # Enable turning some links into links to actions which require
 488         # JavaScript to run (like 'blame_incremental').  Not enabled by
 489         # default.  Project specific override is currently not supported.
 490         'javascript-actions' => {
 491                 'override' => 0,
 492                 'default' => [0]},
 493
 494         # Enable and configure ability to change common timezone for dates
 495         # in gitweb output via JavaScript.  Enabled by default.
 496         # Project specific override is not supported.
 497         'javascript-timezone' => {
 498                 'override' => 0,
 499                 'default' => [
 500                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 501                                      # or undef to turn off this feature
 502                         'gitweb_tz', # name of cookie where to store selected timezone
 503                         'datetime',  # CSS class used to mark up dates for manipulation
 504                 ]},
 505
 506         # Syntax highlighting support. This is based on Daniel Svensson's
 507         # and Sham Chukoury's work in gitweb-xmms2.git.
 508         # It requires the 'highlight' program present in $PATH,
 509         # and therefore is disabled by default.
 510
 511         # To enable system wide have in $GITWEB_CONFIG
 512         # $feature{'highlight'}{'default'} = [1];
 513
 514         'highlight' => {
 515                 'sub' => sub { feature_bool('highlight', @_) },
 516                 'override' => 0,
 517                 'default' => [0]},
 518
 519         # Enable displaying of remote heads in the heads list
 520
 521         # To enable system wide have in $GITWEB_CONFIG
 522         # $feature{'remote_heads'}{'default'} = [1];
 523         # To have project specific config enable override in $GITWEB_CONFIG
 524         # $feature{'remote_heads'}{'override'} = 1;
 525         # and in project config gitweb.remote_heads = 0|1;
 526         'remote_heads' => {
 527                 'sub' => sub { feature_bool('remote_heads', @_) },
 528                 'override' => 0,
 529                 'default' => [0]},
 530 );
 531
 532 sub gitweb_get_feature {
 533         my ($name) = @_;
 534         return unless exists $feature{$name};
 535         my ($sub, $override, @defaults) = (
 536                 $feature{$name}{'sub'},
 537                 $feature{$name}{'override'},
 538                 @{$feature{$name}{'default'}});
 539         # project specific override is possible only if we have project
 540         our $git_dir; # global variable, declared later
 541         if (!$override || !defined $git_dir) {
 542                 return @defaults;
 543         }
 544         if (!defined $sub) {
 545                 warn "feature $name is not overridable";
 546                 return @defaults;
 547         }
 548         return $sub->(@defaults);
 549 }
 550
 551 # A wrapper to check if a given feature is enabled.
 552 # With this, you can say
 553 #
 554 #   my $bool_feat = gitweb_check_feature('bool_feat');
 555 #   gitweb_check_feature('bool_feat') or somecode;
 556 #
 557 # instead of
 558 #
 559 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 560 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 561 #
 562 sub gitweb_check_feature {
 563         return (gitweb_get_feature(@_))[0];
 564 }
 565
 566
 567 sub feature_bool {
 568         my $key = shift;
 569         my ($val) = git_get_project_config($key, '--bool');
 570
 571         if (!defined $val) {
 572                 return ($_[0]);
 573         } elsif ($val eq 'true') {
 574                 return (1);
 575         } elsif ($val eq 'false') {
 576                 return (0);
 577         }
 578 }
 579
 580 sub feature_snapshot {
 581         my (@fmts) = @_;
 582
 583         my ($val) = git_get_project_config('snapshot');
 584
 585         if ($val) {
 586                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 587         }
 588
 589         return @fmts;
 590 }
 591
 592 sub feature_patches {
 593         my @val = (git_get_project_config('patches', '--int'));
 594
 595         if (@val) {
 596                 return @val;
 597         }
 598
 599         return ($_[0]);
 600 }
 601
 602 sub feature_avatar {
 603         my @val = (git_get_project_config('avatar'));
 604
 605         return @val ? @val : @_;
 606 }
 607
 608 # checking HEAD file with -e is fragile if the repository was
 609 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 610 # and then pruned.
 611 sub check_head_link {
 612         my ($dir) = @_;
 613         my $headfile = "$dir/HEAD";
 614         return ((-e $headfile) ||
 615                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 616 }
 617
 618 sub check_export_ok {
 619         my ($dir) = @_;
 620         return (check_head_link($dir) &&
 621                 (!$export_ok || -e "$dir/$export_ok") &&
 622                 (!$export_auth_hook || $export_auth_hook->($dir)));
 623 }
 624
 625 # process alternate names for backward compatibility
 626 # filter out unsupported (unknown) snapshot formats
 627 sub filter_snapshot_fmts {
 628         my @fmts = @_;
 629
 630         @fmts = map {
 631                 exists $known_snapshot_format_aliases{$_} ?
 632                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 633         @fmts = grep {
 634                 exists $known_snapshot_formats{$_} &&
 635                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 636 }
 637
 638 # If it is set to code reference, it is code that it is to be run once per
 639 # request, allowing updating configurations that change with each request,
 640 # while running other code in config file only once.
 641 #
 642 # Otherwise, if it is false then gitweb would process config file only once;
 643 # if it is true then gitweb config would be run for each request.
 644 our $per_request_config = 1;
 645
 646 # read and parse gitweb config file given by its parameter.
 647 # returns true on success, false on recoverable error, allowing
 648 # to chain this subroutine, using first file that exists.
 649 # dies on errors during parsing config file, as it is unrecoverable.
 650 sub read_config_file {
 651         my $filename = shift;
 652         return unless defined $filename;
 653         # die if there are errors parsing config file
 654         if (-e $filename) {
 655                 do $filename;
 656                 die $@ if $@;
 657                 return 1;
 658         }
 659         return;
 660 }
 661
 662 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 663 sub evaluate_gitweb_config {
 664         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 665         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 666
 667         # use first config file that exists
 668         read_config_file($GITWEB_CONFIG) or
 669         read_config_file($GITWEB_CONFIG_SYSTEM);
 670 }
 671
 672 # Get loadavg of system, to compare against $maxload.
 673 # Currently it requires '/proc/loadavg' present to get loadavg;
 674 # if it is not present it returns 0, which means no load checking.
 675 sub get_loadavg {
 676         if( -e '/proc/loadavg' ){
 677                 open my $fd, '<', '/proc/loadavg'
 678                         or return 0;
 679                 my @load = split(/\s+/, scalar <$fd>);
 680                 close $fd;
 681
 682                 # The first three columns measure CPU and IO utilization of the last one,
 683                 # five, and 10 minute periods.  The fourth column shows the number of
 684                 # currently running processes and the total number of processes in the m/n
 685                 # format.  The last column displays the last process ID used.
 686                 return $load[0] || 0;
 687         }
 688         # additional checks for load average should go here for things that don't export
 689         # /proc/loadavg
 690
 691         return 0;
 692 }
 693
 694 # version of the core git binary
 695 our $git_version;
 696 sub evaluate_git_version {
 697         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 698         $number_of_git_cmds++;
 699 }
 700
 701 sub check_loadavg {
 702         if (defined $maxload && get_loadavg() > $maxload) {
 703                 die_error(503, "The load average on the server is too high");
 704         }
 705 }
 706
 707 # ======================================================================
 708 # input validation and dispatch
 709
 710 # input parameters can be collected from a variety of sources (presently, CGI
 711 # and PATH_INFO), so we define an %input_params hash that collects them all
 712 # together during validation: this allows subsequent uses (e.g. href()) to be
 713 # agnostic of the parameter origin
 714
 715 our %input_params = ();
 716
 717 # input parameters are stored with the long parameter name as key. This will
 718 # also be used in the href subroutine to convert parameters to their CGI
 719 # equivalent, and since the href() usage is the most frequent one, we store
 720 # the name -> CGI key mapping here, instead of the reverse.
 721 #
 722 # XXX: Warning: If you touch this, check the search form for updating,
 723 # too.
 724
 725 our @cgi_param_mapping = (
 726         project => "p",
 727         action => "a",
 728         file_name => "f",
 729         file_parent => "fp",
 730         hash => "h",
 731         hash_parent => "hp",
 732         hash_base => "hb",
 733         hash_parent_base => "hpb",
 734         page => "pg",
 735         order => "o",
 736         searchtext => "s",
 737         searchtype => "st",
 738         snapshot_format => "sf",
 739         extra_options => "opt",
 740         search_use_regexp => "sr",
 741         ctag => "by_tag",
 742         # this must be last entry (for manipulation from JavaScript)
 743         javascript => "js"
 744 );
 745 our %cgi_param_mapping = @cgi_param_mapping;
 746
 747 # we will also need to know the possible actions, for validation
 748 our %actions = (
 749         "blame" => \&git_blame,
 750         "blame_incremental" => \&git_blame_incremental,
 751         "blame_data" => \&git_blame_data,
 752         "blobdiff" => \&git_blobdiff,
 753         "blobdiff_plain" => \&git_blobdiff_plain,
 754         "blob" => \&git_blob,
 755         "blob_plain" => \&git_blob_plain,
 756         "commitdiff" => \&git_commitdiff,
 757         "commitdiff_plain" => \&git_commitdiff_plain,
 758         "commit" => \&git_commit,
 759         "forks" => \&git_forks,
 760         "heads" => \&git_heads,
 761         "history" => \&git_history,
 762         "log" => \&git_log,
 763         "patch" => \&git_patch,
 764         "patches" => \&git_patches,
 765         "remotes" => \&git_remotes,
 766         "rss" => \&git_rss,
 767         "atom" => \&git_atom,
 768         "search" => \&git_search,
 769         "search_help" => \&git_search_help,
 770         "shortlog" => \&git_shortlog,
 771         "summary" => \&git_summary,
 772         "tag" => \&git_tag,
 773         "tags" => \&git_tags,
 774         "tree" => \&git_tree,
 775         "snapshot" => \&git_snapshot,
 776         "object" => \&git_object,
 777         # those below don't need $project
 778         "opml" => \&git_opml,
 779         "project_list" => \&git_project_list,
 780         "project_index" => \&git_project_index,
 781 );
 782
 783 # finally, we have the hash of allowed extra_options for the commands that
 784 # allow them
 785 our %allowed_options = (
 786         "--no-merges" => [ qw(rss atom log shortlog history) ],
 787 );
 788
 789 # fill %input_params with the CGI parameters. All values except for 'opt'
 790 # should be single values, but opt can be an array. We should probably
 791 # build an array of parameters that can be multi-valued, but since for the time
 792 # being it's only this one, we just single it out
 793 sub evaluate_query_params {
 794         our $cgi;
 795
 796         while (my ($name, $symbol) = each %cgi_param_mapping) {
 797                 if ($symbol eq 'opt') {
 798                         $input_params{$name} = [ $cgi->param($symbol) ];
 799                 } else {
 800                         $input_params{$name} = $cgi->param($symbol);
 801                 }
 802         }
 803 }
 804
 805 # now read PATH_INFO and update the parameter list for missing parameters
 806 sub evaluate_path_info {
 807         return if defined $input_params{'project'};
 808         return if !$path_info;
 809         $path_info =~ s,^/+,,;
 810         return if !$path_info;
 811
 812         # find which part of PATH_INFO is project
 813         my $project = $path_info;
 814         $project =~ s,/+$,,;
 815         while ($project && !check_head_link("$projectroot/$project")) {
 816                 $project =~ s,/*[^/]*$,,;
 817         }
 818         return unless $project;
 819         $input_params{'project'} = $project;
 820
 821         # do not change any parameters if an action is given using the query string
 822         return if $input_params{'action'};
 823         $path_info =~ s,^\Q$project\E/*,,;
 824
 825         # next, check if we have an action
 826         my $action = $path_info;
 827         $action =~ s,/.*$,,;
 828         if (exists $actions{$action}) {
 829                 $path_info =~ s,^$action/*,,;
 830                 $input_params{'action'} = $action;
 831         }
 832
 833         # list of actions that want hash_base instead of hash, but can have no
 834         # pathname (f) parameter
 835         my @wants_base = (
 836                 'tree',
 837                 'history',
 838         );
 839
 840         # we want to catch, among others
 841         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 842         my ($parentrefname, $parentpathname, $refname, $pathname) =
 843                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 844
 845         # first, analyze the 'current' part
 846         if (defined $pathname) {
 847                 # we got "branch:filename" or "branch:dir/"
 848                 # we could use git_get_type(branch:pathname), but:
 849                 # - it needs $git_dir
 850                 # - it does a git() call
 851                 # - the convention of terminating directories with a slash
 852                 #   makes it superfluous
 853                 # - embedding the action in the PATH_INFO would make it even
 854                 #   more superfluous
 855                 $pathname =~ s,^/+,,;
 856                 if (!$pathname || substr($pathname, -1) eq "/") {
 857                         $input_params{'action'} ||= "tree";
 858                         $pathname =~ s,/$,,;
 859                 } else {
 860                         # the default action depends on whether we had parent info
 861                         # or not
 862                         if ($parentrefname) {
 863                                 $input_params{'action'} ||= "blobdiff_plain";
 864                         } else {
 865                                 $input_params{'action'} ||= "blob_plain";
 866                         }
 867                 }
 868                 $input_params{'hash_base'} ||= $refname;
 869                 $input_params{'file_name'} ||= $pathname;
 870         } elsif (defined $refname) {
 871                 # we got "branch". In this case we have to choose if we have to
 872                 # set hash or hash_base.
 873                 #
 874                 # Most of the actions without a pathname only want hash to be
 875                 # set, except for the ones specified in @wants_base that want
 876                 # hash_base instead. It should also be noted that hand-crafted
 877                 # links having 'history' as an action and no pathname or hash
 878                 # set will fail, but that happens regardless of PATH_INFO.
 879                 if (defined $parentrefname) {
 880                         # if there is parent let the default be 'shortlog' action
 881                         # (for http://git.example.com/repo.git/A..B links); if there
 882                         # is no parent, dispatch will detect type of object and set
 883                         # action appropriately if required (if action is not set)
 884                         $input_params{'action'} ||= "shortlog";
 885                 }
 886                 if ($input_params{'action'} &&
 887                     grep { $_ eq $input_params{'action'} } @wants_base) {
 888                         $input_params{'hash_base'} ||= $refname;
 889                 } else {
 890                         $input_params{'hash'} ||= $refname;
 891                 }
 892         }
 893
 894         # next, handle the 'parent' part, if present
 895         if (defined $parentrefname) {
 896                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 897                 # someproject/blobdiff/oldrev..newrev:/filename
 898                 if ($parentpathname) {
 899                         $parentpathname =~ s,^/+,,;
 900                         $parentpathname =~ s,/$,,;
 901                         $input_params{'file_parent'} ||= $parentpathname;
 902                 } else {
 903                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 904                 }
 905                 # we assume that hash_parent_base is wanted if a path was specified,
 906                 # or if the action wants hash_base instead of hash
 907                 if (defined $input_params{'file_parent'} ||
 908                         grep { $_ eq $input_params{'action'} } @wants_base) {
 909                         $input_params{'hash_parent_base'} ||= $parentrefname;
 910                 } else {
 911                         $input_params{'hash_parent'} ||= $parentrefname;
 912                 }
 913         }
 914
 915         # for the snapshot action, we allow URLs in the form
 916         # $project/snapshot/$hash.ext
 917         # where .ext determines the snapshot and gets removed from the
 918         # passed $refname to provide the $hash.
 919         #
 920         # To be able to tell that $refname includes the format extension, we
 921         # require the following two conditions to be satisfied:
 922         # - the hash input parameter MUST have been set from the $refname part
 923         #   of the URL (i.e. they must be equal)
 924         # - the snapshot format MUST NOT have been defined already (e.g. from
 925         #   CGI parameter sf)
 926         # It's also useless to try any matching unless $refname has a dot,
 927         # so we check for that too
 928         if (defined $input_params{'action'} &&
 929                 $input_params{'action'} eq 'snapshot' &&
 930                 defined $refname && index($refname, '.') != -1 &&
 931                 $refname eq $input_params{'hash'} &&
 932                 !defined $input_params{'snapshot_format'}) {
 933                 # We loop over the known snapshot formats, checking for
 934                 # extensions. Allowed extensions are both the defined suffix
 935                 # (which includes the initial dot already) and the snapshot
 936                 # format key itself, with a prepended dot
 937                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 938                         my $hash = $refname;
 939                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 940                                 next;
 941                         }
 942                         my $sfx = $1;
 943                         # a valid suffix was found, so set the snapshot format
 944                         # and reset the hash parameter
 945                         $input_params{'snapshot_format'} = $fmt;
 946                         $input_params{'hash'} = $hash;
 947                         # we also set the format suffix to the one requested
 948                         # in the URL: this way a request for e.g. .tgz returns
 949                         # a .tgz instead of a .tar.gz
 950                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 951                         last;
 952                 }
 953         }
 954 }
 955
 956 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 957      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 958      $searchtext, $search_regexp);
 959 sub evaluate_and_validate_params {
 960         our $action = $input_params{'action'};
 961         if (defined $action) {
 962                 if (!validate_action($action)) {
 963                         die_error(400, "Invalid action parameter");
 964                 }
 965         }
 966
 967         # parameters which are pathnames
 968         our $project = $input_params{'project'};
 969         if (defined $project) {
 970                 if (!validate_project($project)) {
 971                         undef $project;
 972                         die_error(404, "No such project");
 973                 }
 974         }
 975
 976         our $file_name = $input_params{'file_name'};
 977         if (defined $file_name) {
 978                 if (!validate_pathname($file_name)) {
 979                         die_error(400, "Invalid file parameter");
 980                 }
 981         }
 982
 983         our $file_parent = $input_params{'file_parent'};
 984         if (defined $file_parent) {
 985                 if (!validate_pathname($file_parent)) {
 986                         die_error(400, "Invalid file parent parameter");
 987                 }
 988         }
 989
 990         # parameters which are refnames
 991         our $hash = $input_params{'hash'};
 992         if (defined $hash) {
 993                 if (!validate_refname($hash)) {
 994                         die_error(400, "Invalid hash parameter");
 995                 }
 996         }
 997
 998         our $hash_parent = $input_params{'hash_parent'};
 999         if (defined $hash_parent) {
1000                 if (!validate_refname($hash_parent)) {
1001                         die_error(400, "Invalid hash parent parameter");
1002                 }
1003         }
1004
1005         our $hash_base = $input_params{'hash_base'};
1006         if (defined $hash_base) {
1007                 if (!validate_refname($hash_base)) {
1008                         die_error(400, "Invalid hash base parameter");
1009                 }
1010         }
1011
1012         our @extra_options = @{$input_params{'extra_options'}};
1013         # @extra_options is always defined, since it can only be (currently) set from
1014         # CGI, and $cgi->param() returns the empty array in array context if the param
1015         # is not set
1016         foreach my $opt (@extra_options) {
1017                 if (not exists $allowed_options{$opt}) {
1018                         die_error(400, "Invalid option parameter");
1019                 }
1020                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1021                         die_error(400, "Invalid option parameter for this action");
1022                 }
1023         }
1024
1025         our $hash_parent_base = $input_params{'hash_parent_base'};
1026         if (defined $hash_parent_base) {
1027                 if (!validate_refname($hash_parent_base)) {
1028                         die_error(400, "Invalid hash parent base parameter");
1029                 }
1030         }
1031
1032         # other parameters
1033         our $page = $input_params{'page'};
1034         if (defined $page) {
1035                 if ($page =~ m/[^0-9]/) {
1036                         die_error(400, "Invalid page parameter");
1037                 }
1038         }
1039
1040         our $searchtype = $input_params{'searchtype'};
1041         if (defined $searchtype) {
1042                 if ($searchtype =~ m/[^a-z]/) {
1043                         die_error(400, "Invalid searchtype parameter");
1044                 }
1045         }
1046
1047         our $search_use_regexp = $input_params{'search_use_regexp'};
1048
1049         our $searchtext = $input_params{'searchtext'};
1050         our $search_regexp;
1051         if (defined $searchtext) {
1052                 if (length($searchtext) < 2) {
1053                         die_error(403, "At least two characters are required for search parameter");
1054                 }
1055                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1056         }
1057 }
1058
1059 # path to the current git repository
1060 our $git_dir;
1061 sub evaluate_git_dir {
1062         our $git_dir = "$projectroot/$project" if $project;
1063 }
1064
1065 our (@snapshot_fmts, $git_avatar);
1066 sub configure_gitweb_features {
1067         # list of supported snapshot formats
1068         our @snapshot_fmts = gitweb_get_feature('snapshot');
1069         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1070
1071         # check that the avatar feature is set to a known provider name,
1072         # and for each provider check if the dependencies are satisfied.
1073         # if the provider name is invalid or the dependencies are not met,
1074         # reset $git_avatar to the empty string.
1075         our ($git_avatar) = gitweb_get_feature('avatar');
1076         if ($git_avatar eq 'gravatar') {
1077                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1078         } elsif ($git_avatar eq 'picon') {
1079                 # no dependencies
1080         } else {
1081                 $git_avatar = '';
1082         }
1083 }
1084
1085 # custom error handler: 'die <message>' is Internal Server Error
1086 sub handle_errors_html {
1087         my $msg = shift; # it is already HTML escaped
1088
1089         # to avoid infinite loop where error occurs in die_error,
1090         # change handler to default handler, disabling handle_errors_html
1091         set_message("Error occured when inside die_error:\n$msg");
1092
1093         # you cannot jump out of die_error when called as error handler;
1094         # the subroutine set via CGI::Carp::set_message is called _after_
1095         # HTTP headers are already written, so it cannot write them itself
1096         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1097 }
1098 set_message(\&handle_errors_html);
1099
1100 # dispatch
1101 sub dispatch {
1102         if (!defined $action) {
1103                 if (defined $hash) {
1104                         $action = git_get_type($hash);
1105                 } elsif (defined $hash_base && defined $file_name) {
1106                         $action = git_get_type("$hash_base:$file_name");
1107                 } elsif (defined $project) {
1108                         $action = 'summary';
1109                 } else {
1110                         $action = 'project_list';
1111                 }
1112         }
1113         if (!defined($actions{$action})) {
1114                 die_error(400, "Unknown action");
1115         }
1116         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1117             !$project) {
1118                 die_error(400, "Project needed");
1119         }
1120         $actions{$action}->();
1121 }
1122
1123 sub reset_timer {
1124         our $t0 = [ gettimeofday() ]
1125                 if defined $t0;
1126         our $number_of_git_cmds = 0;
1127 }
1128
1129 our $first_request = 1;
1130 sub run_request {
1131         reset_timer();
1132
1133         evaluate_uri();
1134         if ($first_request) {
1135                 evaluate_gitweb_config();
1136                 evaluate_git_version();
1137         }
1138         if ($per_request_config) {
1139                 if (ref($per_request_config) eq 'CODE') {
1140                         $per_request_config->();
1141                 } elsif (!$first_request) {
1142                         evaluate_gitweb_config();
1143                 }
1144         }
1145         check_loadavg();
1146
1147         # $projectroot and $projects_list might be set in gitweb config file
1148         $projects_list ||= $projectroot;
1149
1150         evaluate_query_params();
1151         evaluate_path_info();
1152         evaluate_and_validate_params();
1153         evaluate_git_dir();
1154
1155         configure_gitweb_features();
1156
1157         dispatch();
1158 }
1159
1160 our $is_last_request = sub { 1 };
1161 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1162 our $CGI = 'CGI';
1163 our $cgi;
1164 sub configure_as_fcgi {
1165         require CGI::Fast;
1166         our $CGI = 'CGI::Fast';
1167
1168         my $request_number = 0;
1169         # let each child service 100 requests
1170         our $is_last_request = sub { ++$request_number > 100 };
1171 }
1172 sub evaluate_argv {
1173         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1174         configure_as_fcgi()
1175                 if $script_name =~ /\.fcgi$/;
1176
1177         return unless (@ARGV);
1178
1179         require Getopt::Long;
1180         Getopt::Long::GetOptions(
1181                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1182                 'nproc|n=i' => sub {
1183                         my ($arg, $val) = @_;
1184                         return unless eval { require FCGI::ProcManager; 1; };
1185                         my $proc_manager = FCGI::ProcManager->new({
1186                                 n_processes => $val,
1187                         });
1188                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1189                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1190                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1191                 },
1192         );
1193 }
1194
1195 sub run {
1196         evaluate_argv();
1197
1198         $first_request = 1;
1199         $pre_listen_hook->()
1200                 if $pre_listen_hook;
1201
1202  REQUEST:
1203         while ($cgi = $CGI->new()) {
1204                 $pre_dispatch_hook->()
1205                         if $pre_dispatch_hook;
1206
1207                 run_request();
1208
1209                 $post_dispatch_hook->()
1210                         if $post_dispatch_hook;
1211                 $first_request = 0;
1212
1213                 last REQUEST if ($is_last_request->());
1214         }
1215
1216  DONE_GITWEB:
1217         1;
1218 }
1219
1220 run();
1221
1222 if (defined caller) {
1223         # wrapped in a subroutine processing requests,
1224         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1225         return;
1226 } else {
1227         # pure CGI script, serving single request
1228         exit;
1229 }
1230
1231 ## ======================================================================
1232 ## action links
1233
1234 # possible values of extra options
1235 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1236 # -replay => 1      - start from a current view (replay with modifications)
1237 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1238 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1239 sub href {
1240         my %params = @_;
1241         # default is to use -absolute url() i.e. $my_uri
1242         my $href = $params{-full} ? $my_url : $my_uri;
1243
1244         # implicit -replay, must be first of implicit params
1245         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1246
1247         $params{'project'} = $project unless exists $params{'project'};
1248
1249         if ($params{-replay}) {
1250                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1251                         if (!exists $params{$name}) {
1252                                 $params{$name} = $input_params{$name};
1253                         }
1254                 }
1255         }
1256
1257         my $use_pathinfo = gitweb_check_feature('pathinfo');
1258         if (defined $params{'project'} &&
1259             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1260                 # try to put as many parameters as possible in PATH_INFO:
1261                 #   - project name
1262                 #   - action
1263                 #   - hash_parent or hash_parent_base:/file_parent
1264                 #   - hash or hash_base:/filename
1265                 #   - the snapshot_format as an appropriate suffix
1266
1267                 # When the script is the root DirectoryIndex for the domain,
1268                 # $href here would be something like http://gitweb.example.com/
1269                 # Thus, we strip any trailing / from $href, to spare us double
1270                 # slashes in the final URL
1271                 $href =~ s,/$,,;
1272
1273                 # Then add the project name, if present
1274                 $href .= "/".esc_path_info($params{'project'});
1275                 delete $params{'project'};
1276
1277                 # since we destructively absorb parameters, we keep this
1278                 # boolean that remembers if we're handling a snapshot
1279                 my $is_snapshot = $params{'action'} eq 'snapshot';
1280
1281                 # Summary just uses the project path URL, any other action is
1282                 # added to the URL
1283                 if (defined $params{'action'}) {
1284                         $href .= "/".esc_path_info($params{'action'})
1285                                 unless $params{'action'} eq 'summary';
1286                         delete $params{'action'};
1287                 }
1288
1289                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1290                 # stripping nonexistent or useless pieces
1291                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1292                         || $params{'hash_parent'} || $params{'hash'});
1293                 if (defined $params{'hash_base'}) {
1294                         if (defined $params{'hash_parent_base'}) {
1295                                 $href .= esc_path_info($params{'hash_parent_base'});
1296                                 # skip the file_parent if it's the same as the file_name
1297                                 if (defined $params{'file_parent'}) {
1298                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1299                                                 delete $params{'file_parent'};
1300                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1301                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1302                                                 delete $params{'file_parent'};
1303                                         }
1304                                 }
1305                                 $href .= "..";
1306                                 delete $params{'hash_parent'};
1307                                 delete $params{'hash_parent_base'};
1308                         } elsif (defined $params{'hash_parent'}) {
1309                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1310                                 delete $params{'hash_parent'};
1311                         }
1312
1313                         $href .= esc_path_info($params{'hash_base'});
1314                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1315                                 $href .= ":/".esc_path_info($params{'file_name'});
1316                                 delete $params{'file_name'};
1317                         }
1318                         delete $params{'hash'};
1319                         delete $params{'hash_base'};
1320                 } elsif (defined $params{'hash'}) {
1321                         $href .= esc_path_info($params{'hash'});
1322                         delete $params{'hash'};
1323                 }
1324
1325                 # If the action was a snapshot, we can absorb the
1326                 # snapshot_format parameter too
1327                 if ($is_snapshot) {
1328                         my $fmt = $params{'snapshot_format'};
1329                         # snapshot_format should always be defined when href()
1330                         # is called, but just in case some code forgets, we
1331                         # fall back to the default
1332                         $fmt ||= $snapshot_fmts[0];
1333                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1334                         delete $params{'snapshot_format'};
1335                 }
1336         }
1337
1338         # now encode the parameters explicitly
1339         my @result = ();
1340         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1341                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1342                 if (defined $params{$name}) {
1343                         if (ref($params{$name}) eq "ARRAY") {
1344                                 foreach my $par (@{$params{$name}}) {
1345                                         push @result, $symbol . "=" . esc_param($par);
1346                                 }
1347                         } else {
1348                                 push @result, $symbol . "=" . esc_param($params{$name});
1349                         }
1350                 }
1351         }
1352         $href .= "?" . join(';', @result) if scalar @result;
1353
1354         # final transformation: trailing spaces must be escaped (URI-encoded)
1355         $href =~ s/(\s+)$/CGI::escape($1)/e;
1356
1357         if ($params{-anchor}) {
1358                 $href .= "#".esc_param($params{-anchor});
1359         }
1360
1361         return $href;
1362 }
1363
1364
1365 ## ======================================================================
1366 ## validation, quoting/unquoting and escaping
1367
1368 sub validate_action {
1369         my $input = shift || return undef;
1370         return undef unless exists $actions{$input};
1371         return $input;
1372 }
1373
1374 sub validate_project {
1375         my $input = shift || return undef;
1376         if (!validate_pathname($input) ||
1377                 !(-d "$projectroot/$input") ||
1378                 !check_export_ok("$projectroot/$input") ||
1379                 ($strict_export && !project_in_list($input))) {
1380                 return undef;
1381         } else {
1382                 return $input;
1383         }
1384 }
1385
1386 sub validate_pathname {
1387         my $input = shift || return undef;
1388
1389         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1390         # at the beginning, at the end, and between slashes.
1391         # also this catches doubled slashes
1392         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1393                 return undef;
1394         }
1395         # no null characters
1396         if ($input =~ m!\0!) {
1397                 return undef;
1398         }
1399         return $input;
1400 }
1401
1402 sub validate_refname {
1403         my $input = shift || return undef;
1404
1405         # textual hashes are O.K.
1406         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1407                 return $input;
1408         }
1409         # it must be correct pathname
1410         $input = validate_pathname($input)
1411                 or return undef;
1412         # restrictions on ref name according to git-check-ref-format
1413         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1414                 return undef;
1415         }
1416         return $input;
1417 }
1418
1419 # decode sequences of octets in utf8 into Perl's internal form,
1420 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1421 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1422 sub to_utf8 {
1423         my $str = shift;
1424         return undef unless defined $str;
1425         if (utf8::valid($str)) {
1426                 utf8::decode($str);
1427                 return $str;
1428         } else {
1429                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1430         }
1431 }
1432
1433 # quote unsafe chars, but keep the slash, even when it's not
1434 # correct, but quoted slashes look too horrible in bookmarks
1435 sub esc_param {
1436         my $str = shift;
1437         return undef unless defined $str;
1438         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1439         $str =~ s/ /\+/g;
1440         return $str;
1441 }
1442
1443 # the quoting rules for path_info fragment are slightly different
1444 sub esc_path_info {
1445         my $str = shift;
1446         return undef unless defined $str;
1447
1448         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1449         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1450
1451         return $str;
1452 }
1453
1454 # quote unsafe chars in whole URL, so some characters cannot be quoted
1455 sub esc_url {
1456         my $str = shift;
1457         return undef unless defined $str;
1458         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1459         $str =~ s/ /\+/g;
1460         return $str;
1461 }
1462
1463 # quote unsafe characters in HTML attributes
1464 sub esc_attr {
1465
1466         # for XHTML conformance escaping '"' to '&quot;' is not enough
1467         return esc_html(@_);
1468 }
1469
1470 # replace invalid utf8 character with SUBSTITUTION sequence
1471 sub esc_html {
1472         my $str = shift;
1473         my %opts = @_;
1474
1475         return undef unless defined $str;
1476
1477         $str = to_utf8($str);
1478         $str = $cgi->escapeHTML($str);
1479         if ($opts{'-nbsp'}) {
1480                 $str =~ s/ /&nbsp;/g;
1481         }
1482         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1483         return $str;
1484 }
1485
1486 # quote control characters and escape filename to HTML
1487 sub esc_path {
1488         my $str = shift;
1489         my %opts = @_;
1490
1491         return undef unless defined $str;
1492
1493         $str = to_utf8($str);
1494         $str = $cgi->escapeHTML($str);
1495         if ($opts{'-nbsp'}) {
1496                 $str =~ s/ /&nbsp;/g;
1497         }
1498         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1499         return $str;
1500 }
1501
1502 # Make control characters "printable", using character escape codes (CEC)
1503 sub quot_cec {
1504         my $cntrl = shift;
1505         my %opts = @_;
1506         my %es = ( # character escape codes, aka escape sequences
1507                 "\t" => '\t',   # tab            (HT)
1508                 "\n" => '\n',   # line feed      (LF)
1509                 "\r" => '\r',   # carrige return (CR)
1510                 "\f" => '\f',   # form feed      (FF)
1511                 "\b" => '\b',   # backspace      (BS)
1512                 "\a" => '\a',   # alarm (bell)   (BEL)
1513                 "\e" => '\e',   # escape         (ESC)
1514                 "\013" => '\v', # vertical tab   (VT)
1515                 "\000" => '\0', # nul character  (NUL)
1516         );
1517         my $chr = ( (exists $es{$cntrl})
1518                     ? $es{$cntrl}
1519                     : sprintf('\%2x', ord($cntrl)) );
1520         if ($opts{-nohtml}) {
1521                 return $chr;
1522         } else {
1523                 return "<span class=\"cntrl\">$chr</span>";
1524         }
1525 }
1526
1527 # Alternatively use unicode control pictures codepoints,
1528 # Unicode "printable representation" (PR)
1529 sub quot_upr {
1530         my $cntrl = shift;
1531         my %opts = @_;
1532
1533         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1534         if ($opts{-nohtml}) {
1535                 return $chr;
1536         } else {
1537                 return "<span class=\"cntrl\">$chr</span>";
1538         }
1539 }
1540
1541 # git may return quoted and escaped filenames
1542 sub unquote {
1543         my $str = shift;
1544
1545         sub unq {
1546                 my $seq = shift;
1547                 my %es = ( # character escape codes, aka escape sequences
1548                         't' => "\t",   # tab            (HT, TAB)
1549                         'n' => "\n",   # newline        (NL)
1550                         'r' => "\r",   # return         (CR)
1551                         'f' => "\f",   # form feed      (FF)
1552                         'b' => "\b",   # backspace      (BS)
1553                         'a' => "\a",   # alarm (bell)   (BEL)
1554                         'e' => "\e",   # escape         (ESC)
1555                         'v' => "\013", # vertical tab   (VT)
1556                 );
1557
1558                 if ($seq =~ m/^[0-7]{1,3}$/) {
1559                         # octal char sequence
1560                         return chr(oct($seq));
1561                 } elsif (exists $es{$seq}) {
1562                         # C escape sequence, aka character escape code
1563                         return $es{$seq};
1564                 }
1565                 # quoted ordinary character
1566                 return $seq;
1567         }
1568
1569         if ($str =~ m/^"(.*)"$/) {
1570                 # needs unquoting
1571                 $str = $1;
1572                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1573         }
1574         return $str;
1575 }
1576
1577 # escape tabs (convert tabs to spaces)
1578 sub untabify {
1579         my $line = shift;
1580
1581         while ((my $pos = index($line, "\t")) != -1) {
1582                 if (my $count = (8 - ($pos % 8))) {
1583                         my $spaces = ' ' x $count;
1584                         $line =~ s/\t/$spaces/;
1585                 }
1586         }
1587
1588         return $line;
1589 }
1590
1591 sub project_in_list {
1592         my $project = shift;
1593         my @list = git_get_projects_list();
1594         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1595 }
1596
1597 ## ----------------------------------------------------------------------
1598 ## HTML aware string manipulation
1599
1600 # Try to chop given string on a word boundary between position
1601 # $len and $len+$add_len. If there is no word boundary there,
1602 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1603 # (marking chopped part) would be longer than given string.
1604 sub chop_str {
1605         my $str = shift;
1606         my $len = shift;
1607         my $add_len = shift || 10;
1608         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1609
1610         # Make sure perl knows it is utf8 encoded so we don't
1611         # cut in the middle of a utf8 multibyte char.
1612         $str = to_utf8($str);
1613
1614         # allow only $len chars, but don't cut a word if it would fit in $add_len
1615         # if it doesn't fit, cut it if it's still longer than the dots we would add
1616         # remove chopped character entities entirely
1617
1618         # when chopping in the middle, distribute $len into left and right part
1619         # return early if chopping wouldn't make string shorter
1620         if ($where eq 'center') {
1621                 return $str if ($len + 5 >= length($str)); # filler is length 5
1622                 $len = int($len/2);
1623         } else {
1624                 return $str if ($len + 4 >= length($str)); # filler is length 4
1625         }
1626
1627         # regexps: ending and beginning with word part up to $add_len
1628         my $endre = qr/.{$len}\w{0,$add_len}/;
1629         my $begre = qr/\w{0,$add_len}.{$len}/;
1630
1631         if ($where eq 'left') {
1632                 $str =~ m/^(.*?)($begre)$/;
1633                 my ($lead, $body) = ($1, $2);
1634                 if (length($lead) > 4) {
1635                         $lead = " ...";
1636                 }
1637                 return "$lead$body";
1638
1639         } elsif ($where eq 'center') {
1640                 $str =~ m/^($endre)(.*)$/;
1641                 my ($left, $str)  = ($1, $2);
1642                 $str =~ m/^(.*?)($begre)$/;
1643                 my ($mid, $right) = ($1, $2);
1644                 if (length($mid) > 5) {
1645                         $mid = " ... ";
1646                 }
1647                 return "$left$mid$right";
1648
1649         } else {
1650                 $str =~ m/^($endre)(.*)$/;
1651                 my $body = $1;
1652                 my $tail = $2;
1653                 if (length($tail) > 4) {
1654                         $tail = "... ";
1655                 }
1656                 return "$body$tail";
1657         }
1658 }
1659
1660 # takes the same arguments as chop_str, but also wraps a <span> around the
1661 # result with a title attribute if it does get chopped. Additionally, the
1662 # string is HTML-escaped.
1663 sub chop_and_escape_str {
1664         my ($str) = @_;
1665
1666         my $chopped = chop_str(@_);
1667         if ($chopped eq $str) {
1668                 return esc_html($chopped);
1669         } else {
1670                 $str =~ s/[[:cntrl:]]/?/g;
1671                 return $cgi->span({-title=>$str}, esc_html($chopped));
1672         }
1673 }
1674
1675 ## ----------------------------------------------------------------------
1676 ## functions returning short strings
1677
1678 # CSS class for given age value (in seconds)
1679 sub age_class {
1680         my $age = shift;
1681
1682         if (!defined $age) {
1683                 return "noage";
1684         } elsif ($age < 60*60*2) {
1685                 return "age0";
1686         } elsif ($age < 60*60*24*2) {
1687                 return "age1";
1688         } else {
1689                 return "age2";
1690         }
1691 }
1692
1693 # convert age in seconds to "nn units ago" string
1694 sub age_string {
1695         my $age = shift;
1696         my $age_str;
1697
1698         if ($age > 60*60*24*365*2) {
1699                 $age_str = (int $age/60/60/24/365);
1700                 $age_str .= " years ago";
1701         } elsif ($age > 60*60*24*(365/12)*2) {
1702                 $age_str = int $age/60/60/24/(365/12);
1703                 $age_str .= " months ago";
1704         } elsif ($age > 60*60*24*7*2) {
1705                 $age_str = int $age/60/60/24/7;
1706                 $age_str .= " weeks ago";
1707         } elsif ($age > 60*60*24*2) {
1708                 $age_str = int $age/60/60/24;
1709                 $age_str .= " days ago";
1710         } elsif ($age > 60*60*2) {
1711                 $age_str = int $age/60/60;
1712                 $age_str .= " hours ago";
1713         } elsif ($age > 60*2) {
1714                 $age_str = int $age/60;
1715                 $age_str .= " min ago";
1716         } elsif ($age > 2) {
1717                 $age_str = int $age;
1718                 $age_str .= " sec ago";
1719         } else {
1720                 $age_str .= " right now";
1721         }
1722         return $age_str;
1723 }
1724
1725 use constant {
1726         S_IFINVALID => 0030000,
1727         S_IFGITLINK => 0160000,
1728 };
1729
1730 # submodule/subproject, a commit object reference
1731 sub S_ISGITLINK {
1732         my $mode = shift;
1733
1734         return (($mode & S_IFMT) == S_IFGITLINK)
1735 }
1736
1737 # convert file mode in octal to symbolic file mode string
1738 sub mode_str {
1739         my $mode = oct shift;
1740
1741         if (S_ISGITLINK($mode)) {
1742                 return 'm---------';
1743         } elsif (S_ISDIR($mode & S_IFMT)) {
1744                 return 'drwxr-xr-x';
1745         } elsif (S_ISLNK($mode)) {
1746                 return 'lrwxrwxrwx';
1747         } elsif (S_ISREG($mode)) {
1748                 # git cares only about the executable bit
1749                 if ($mode & S_IXUSR) {
1750                         return '-rwxr-xr-x';
1751                 } else {
1752                         return '-rw-r--r--';
1753                 };
1754         } else {
1755                 return '----------';
1756         }
1757 }
1758
1759 # convert file mode in octal to file type string
1760 sub file_type {
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                 return "file";
1777         } else {
1778                 return "unknown";
1779         }
1780 }
1781
1782 # convert file mode in octal to file type description string
1783 sub file_type_long {
1784         my $mode = shift;
1785
1786         if ($mode !~ m/^[0-7]+$/) {
1787                 return $mode;
1788         } else {
1789                 $mode = oct $mode;
1790         }
1791
1792         if (S_ISGITLINK($mode)) {
1793                 return "submodule";
1794         } elsif (S_ISDIR($mode & S_IFMT)) {
1795                 return "directory";
1796         } elsif (S_ISLNK($mode)) {
1797                 return "symlink";
1798         } elsif (S_ISREG($mode)) {
1799                 if ($mode & S_IXUSR) {
1800                         return "executable";
1801                 } else {
1802                         return "file";
1803                 };
1804         } else {
1805                 return "unknown";
1806         }
1807 }
1808
1809
1810 ## ----------------------------------------------------------------------
1811 ## functions returning short HTML fragments, or transforming HTML fragments
1812 ## which don't belong to other sections
1813
1814 # format line of commit message.
1815 sub format_log_line_html {
1816         my $line = shift;
1817
1818         $line = esc_html($line, -nbsp=>1);
1819         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1820                 $cgi->a({-href => href(action=>"object", hash=>$1),
1821                                         -class => "text"}, $1);
1822         }eg;
1823
1824         return $line;
1825 }
1826
1827 # format marker of refs pointing to given object
1828
1829 # the destination action is chosen based on object type and current context:
1830 # - for annotated tags, we choose the tag view unless it's the current view
1831 #   already, in which case we go to shortlog view
1832 # - for other refs, we keep the current view if we're in history, shortlog or
1833 #   log view, and select shortlog otherwise
1834 sub format_ref_marker {
1835         my ($refs, $id) = @_;
1836         my $markers = '';
1837
1838         if (defined $refs->{$id}) {
1839                 foreach my $ref (@{$refs->{$id}}) {
1840                         # this code exploits the fact that non-lightweight tags are the
1841                         # only indirect objects, and that they are the only objects for which
1842                         # we want to use tag instead of shortlog as action
1843                         my ($type, $name) = qw();
1844                         my $indirect = ($ref =~ s/\^\{\}$//);
1845                         # e.g. tags/v2.6.11 or heads/next
1846                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1847                                 $type = $1;
1848                                 $name = $2;
1849                         } else {
1850                                 $type = "ref";
1851                                 $name = $ref;
1852                         }
1853
1854                         my $class = $type;
1855                         $class .= " indirect" if $indirect;
1856
1857                         my $dest_action = "shortlog";
1858
1859                         if ($indirect) {
1860                                 $dest_action = "tag" unless $action eq "tag";
1861                         } elsif ($action =~ /^(history|(short)?log)$/) {
1862                                 $dest_action = $action;
1863                         }
1864
1865                         my $dest = "";
1866                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1867                         $dest .= $ref;
1868
1869                         my $link = $cgi->a({
1870                                 -href => href(
1871                                         action=>$dest_action,
1872                                         hash=>$dest
1873                                 )}, $name);
1874
1875                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1876                                 $link . "</span>";
1877                 }
1878         }
1879
1880         if ($markers) {
1881                 return ' <span class="refs">'. $markers . '</span>';
1882         } else {
1883                 return "";
1884         }
1885 }
1886
1887 # format, perhaps shortened and with markers, title line
1888 sub format_subject_html {
1889         my ($long, $short, $href, $extra) = @_;
1890         $extra = '' unless defined($extra);
1891
1892         if (length($short) < length($long)) {
1893                 $long =~ s/[[:cntrl:]]/?/g;
1894                 return $cgi->a({-href => $href, -class => "list subject",
1895                                 -title => to_utf8($long)},
1896                        esc_html($short)) . $extra;
1897         } else {
1898                 return $cgi->a({-href => $href, -class => "list subject"},
1899                        esc_html($long)) . $extra;
1900         }
1901 }
1902
1903 # Rather than recomputing the url for an email multiple times, we cache it
1904 # after the first hit. This gives a visible benefit in views where the avatar
1905 # for the same email is used repeatedly (e.g. shortlog).
1906 # The cache is shared by all avatar engines (currently gravatar only), which
1907 # are free to use it as preferred. Since only one avatar engine is used for any
1908 # given page, there's no risk for cache conflicts.
1909 our %avatar_cache = ();
1910
1911 # Compute the picon url for a given email, by using the picon search service over at
1912 # http://www.cs.indiana.edu/picons/search.html
1913 sub picon_url {
1914         my $email = lc shift;
1915         if (!$avatar_cache{$email}) {
1916                 my ($user, $domain) = split('@', $email);
1917                 $avatar_cache{$email} =
1918                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1919                         "$domain/$user/" .
1920                         "users+domains+unknown/up/single";
1921         }
1922         return $avatar_cache{$email};
1923 }
1924
1925 # Compute the gravatar url for a given email, if it's not in the cache already.
1926 # Gravatar stores only the part of the URL before the size, since that's the
1927 # one computationally more expensive. This also allows reuse of the cache for
1928 # different sizes (for this particular engine).
1929 sub gravatar_url {
1930         my $email = lc shift;
1931         my $size = shift;
1932         $avatar_cache{$email} ||=
1933                 "http://www.gravatar.com/avatar/" .
1934                         Digest::MD5::md5_hex($email) . "?s=";
1935         return $avatar_cache{$email} . $size;
1936 }
1937
1938 # Insert an avatar for the given $email at the given $size if the feature
1939 # is enabled.
1940 sub git_get_avatar {
1941         my ($email, %opts) = @_;
1942         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1943         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1944         $opts{-size} ||= 'default';
1945         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1946         my $url = "";
1947         if ($git_avatar eq 'gravatar') {
1948                 $url = gravatar_url($email, $size);
1949         } elsif ($git_avatar eq 'picon') {
1950                 $url = picon_url($email);
1951         }
1952         # Other providers can be added by extending the if chain, defining $url
1953         # as needed. If no variant puts something in $url, we assume avatars
1954         # are completely disabled/unavailable.
1955         if ($url) {
1956                 return $pre_white .
1957                        "<img width=\"$size\" " .
1958                             "class=\"avatar\" " .
1959                             "src=\"".esc_url($url)."\" " .
1960                             "alt=\"\" " .
1961                        "/>" . $post_white;
1962         } else {
1963                 return "";
1964         }
1965 }
1966
1967 sub format_search_author {
1968         my ($author, $searchtype, $displaytext) = @_;
1969         my $have_search = gitweb_check_feature('search');
1970
1971         if ($have_search) {
1972                 my $performed = "";
1973                 if ($searchtype eq 'author') {
1974                         $performed = "authored";
1975                 } elsif ($searchtype eq 'committer') {
1976                         $performed = "committed";
1977                 }
1978
1979                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1980                                 searchtext=>$author,
1981                                 searchtype=>$searchtype), class=>"list",
1982                                 title=>"Search for commits $performed by $author"},
1983                                 $displaytext);
1984
1985         } else {
1986                 return $displaytext;
1987         }
1988 }
1989
1990 # format the author name of the given commit with the given tag
1991 # the author name is chopped and escaped according to the other
1992 # optional parameters (see chop_str).
1993 sub format_author_html {
1994         my $tag = shift;
1995         my $co = shift;
1996         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1997         return "<$tag class=\"author\">" .
1998                format_search_author($co->{'author_name'}, "author",
1999                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2000                        $author) .
2001                "</$tag>";
2002 }
2003
2004 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2005 sub format_git_diff_header_line {
2006         my $line = shift;
2007         my $diffinfo = shift;
2008         my ($from, $to) = @_;
2009
2010         if ($diffinfo->{'nparents'}) {
2011                 # combined diff
2012                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2013                 if ($to->{'href'}) {
2014                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2015                                          esc_path($to->{'file'}));
2016                 } else { # file was deleted (no href)
2017                         $line .= esc_path($to->{'file'});
2018                 }
2019         } else {
2020                 # "ordinary" diff
2021                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2022                 if ($from->{'href'}) {
2023                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2024                                          'a/' . esc_path($from->{'file'}));
2025                 } else { # file was added (no href)
2026                         $line .= 'a/' . esc_path($from->{'file'});
2027                 }
2028                 $line .= ' ';
2029                 if ($to->{'href'}) {
2030                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2031                                          'b/' . esc_path($to->{'file'}));
2032                 } else { # file was deleted
2033                         $line .= 'b/' . esc_path($to->{'file'});
2034                 }
2035         }
2036
2037         return "<div class=\"diff header\">$line</div>\n";
2038 }
2039
2040 # format extended diff header line, before patch itself
2041 sub format_extended_diff_header_line {
2042         my $line = shift;
2043         my $diffinfo = shift;
2044         my ($from, $to) = @_;
2045
2046         # match <path>
2047         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2048                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2049                                        esc_path($from->{'file'}));
2050         }
2051         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2052                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2053                                  esc_path($to->{'file'}));
2054         }
2055         # match single <mode>
2056         if ($line =~ m/\s(\d{6})$/) {
2057                 $line .= '<span class="info"> (' .
2058                          file_type_long($1) .
2059                          ')</span>';
2060         }
2061         # match <hash>
2062         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2063                 # can match only for combined diff
2064                 $line = 'index ';
2065                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2066                         if ($from->{'href'}[$i]) {
2067                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2068                                                   -class=>"hash"},
2069                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2070                         } else {
2071                                 $line .= '0' x 7;
2072                         }
2073                         # separator
2074                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2075                 }
2076                 $line .= '..';
2077                 if ($to->{'href'}) {
2078                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2079                                          substr($diffinfo->{'to_id'},0,7));
2080                 } else {
2081                         $line .= '0' x 7;
2082                 }
2083
2084         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2085                 # can match only for ordinary diff
2086                 my ($from_link, $to_link);
2087                 if ($from->{'href'}) {
2088                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2089                                              substr($diffinfo->{'from_id'},0,7));
2090                 } else {
2091                         $from_link = '0' x 7;
2092                 }
2093                 if ($to->{'href'}) {
2094                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2095                                            substr($diffinfo->{'to_id'},0,7));
2096                 } else {
2097                         $to_link = '0' x 7;
2098                 }
2099                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2100                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2101         }
2102
2103         return $line . "<br/>\n";
2104 }
2105
2106 # format from-file/to-file diff header
2107 sub format_diff_from_to_header {
2108         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2109         my $line;
2110         my $result = '';
2111
2112         $line = $from_line;
2113         #assert($line =~ m/^---/) if DEBUG;
2114         # no extra formatting for "^--- /dev/null"
2115         if (! $diffinfo->{'nparents'}) {
2116                 # ordinary (single parent) diff
2117                 if ($line =~ m!^--- "?a/!) {
2118                         if ($from->{'href'}) {
2119                                 $line = '--- a/' .
2120                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2121                                                 esc_path($from->{'file'}));
2122                         } else {
2123                                 $line = '--- a/' .
2124                                         esc_path($from->{'file'});
2125                         }
2126                 }
2127                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2128
2129         } else {
2130                 # combined diff (merge commit)
2131                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2132                         if ($from->{'href'}[$i]) {
2133                                 $line = '--- ' .
2134                                         $cgi->a({-href=>href(action=>"blobdiff",
2135                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2136                                                              hash_parent_base=>$parents[$i],
2137                                                              file_parent=>$from->{'file'}[$i],
2138                                                              hash=>$diffinfo->{'to_id'},
2139                                                              hash_base=>$hash,
2140                                                              file_name=>$to->{'file'}),
2141                                                  -class=>"path",
2142                                                  -title=>"diff" . ($i+1)},
2143                                                 $i+1) .
2144                                         '/' .
2145                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2146                                                 esc_path($from->{'file'}[$i]));
2147                         } else {
2148                                 $line = '--- /dev/null';
2149                         }
2150                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2151                 }
2152         }
2153
2154         $line = $to_line;
2155         #assert($line =~ m/^\+\+\+/) if DEBUG;
2156         # no extra formatting for "^+++ /dev/null"
2157         if ($line =~ m!^\+\+\+ "?b/!) {
2158                 if ($to->{'href'}) {
2159                         $line = '+++ b/' .
2160                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2161                                         esc_path($to->{'file'}));
2162                 } else {
2163                         $line = '+++ b/' .
2164                                 esc_path($to->{'file'});
2165                 }
2166         }
2167         $result .= qq!<div class="diff to_file">$line</div>\n!;
2168
2169         return $result;
2170 }
2171
2172 # create note for patch simplified by combined diff
2173 sub format_diff_cc_simplified {
2174         my ($diffinfo, @parents) = @_;
2175         my $result = '';
2176
2177         $result .= "<div class=\"diff header\">" .
2178                    "diff --cc ";
2179         if (!is_deleted($diffinfo)) {
2180                 $result .= $cgi->a({-href => href(action=>"blob",
2181                                                   hash_base=>$hash,
2182                                                   hash=>$diffinfo->{'to_id'},
2183                                                   file_name=>$diffinfo->{'to_file'}),
2184                                     -class => "path"},
2185                                    esc_path($diffinfo->{'to_file'}));
2186         } else {
2187                 $result .= esc_path($diffinfo->{'to_file'});
2188         }
2189         $result .= "</div>\n" . # class="diff header"
2190                    "<div class=\"diff nodifferences\">" .
2191                    "Simple merge" .
2192                    "</div>\n"; # class="diff nodifferences"
2193
2194         return $result;
2195 }
2196
2197 # format patch (diff) line (not to be used for diff headers)
2198 sub format_diff_line {
2199         my $line = shift;
2200         my ($from, $to) = @_;
2201         my $diff_class = "";
2202
2203         chomp $line;
2204
2205         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2206                 # combined diff
2207                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2208                 if ($line =~ m/^\@{3}/) {
2209                         $diff_class = " chunk_header";
2210                 } elsif ($line =~ m/^\\/) {
2211                         $diff_class = " incomplete";
2212                 } elsif ($prefix =~ tr/+/+/) {
2213                         $diff_class = " add";
2214                 } elsif ($prefix =~ tr/-/-/) {
2215                         $diff_class = " rem";
2216                 }
2217         } else {
2218                 # assume ordinary diff
2219                 my $char = substr($line, 0, 1);
2220                 if ($char eq '+') {
2221                         $diff_class = " add";
2222                 } elsif ($char eq '-') {
2223                         $diff_class = " rem";
2224                 } elsif ($char eq '@') {
2225                         $diff_class = " chunk_header";
2226                 } elsif ($char eq "\\") {
2227                         $diff_class = " incomplete";
2228                 }
2229         }
2230         $line = untabify($line);
2231         if ($from && $to && $line =~ m/^\@{2} /) {
2232                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2233                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2234
2235                 $from_lines = 0 unless defined $from_lines;
2236                 $to_lines   = 0 unless defined $to_lines;
2237
2238                 if ($from->{'href'}) {
2239                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2240                                              -class=>"list"}, $from_text);
2241                 }
2242                 if ($to->{'href'}) {
2243                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2244                                              -class=>"list"}, $to_text);
2245                 }
2246                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2247                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2248                 return "<div class=\"diff$diff_class\">$line</div>\n";
2249         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2250                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2251                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2252
2253                 @from_text = split(' ', $ranges);
2254                 for (my $i = 0; $i < @from_text; ++$i) {
2255                         ($from_start[$i], $from_nlines[$i]) =
2256                                 (split(',', substr($from_text[$i], 1)), 0);
2257                 }
2258
2259                 $to_text   = pop @from_text;
2260                 $to_start  = pop @from_start;
2261                 $to_nlines = pop @from_nlines;
2262
2263                 $line = "<span class=\"chunk_info\">$prefix ";
2264                 for (my $i = 0; $i < @from_text; ++$i) {
2265                         if ($from->{'href'}[$i]) {
2266                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2267                                                   -class=>"list"}, $from_text[$i]);
2268                         } else {
2269                                 $line .= $from_text[$i];
2270                         }
2271                         $line .= " ";
2272                 }
2273                 if ($to->{'href'}) {
2274                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2275                                           -class=>"list"}, $to_text);
2276                 } else {
2277                         $line .= $to_text;
2278                 }
2279                 $line .= " $prefix</span>" .
2280                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2281                 return "<div class=\"diff$diff_class\">$line</div>\n";
2282         }
2283         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2284 }
2285
2286 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2287 # linked.  Pass the hash of the tree/commit to snapshot.
2288 sub format_snapshot_links {
2289         my ($hash) = @_;
2290         my $num_fmts = @snapshot_fmts;
2291         if ($num_fmts > 1) {
2292                 # A parenthesized list of links bearing format names.
2293                 # e.g. "snapshot (_tar.gz_ _zip_)"
2294                 return "snapshot (" . join(' ', map
2295                         $cgi->a({
2296                                 -href => href(
2297                                         action=>"snapshot",
2298                                         hash=>$hash,
2299                                         snapshot_format=>$_
2300                                 )
2301                         }, $known_snapshot_formats{$_}{'display'})
2302                 , @snapshot_fmts) . ")";
2303         } elsif ($num_fmts == 1) {
2304                 # A single "snapshot" link whose tooltip bears the format name.
2305                 # i.e. "_snapshot_"
2306                 my ($fmt) = @snapshot_fmts;
2307                 return
2308                         $cgi->a({
2309                                 -href => href(
2310                                         action=>"snapshot",
2311                                         hash=>$hash,
2312                                         snapshot_format=>$fmt
2313                                 ),
2314                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2315                         }, "snapshot");
2316         } else { # $num_fmts == 0
2317                 return undef;
2318         }
2319 }
2320
2321 ## ......................................................................
2322 ## functions returning values to be passed, perhaps after some
2323 ## transformation, to other functions; e.g. returning arguments to href()
2324
2325 # returns hash to be passed to href to generate gitweb URL
2326 # in -title key it returns description of link
2327 sub get_feed_info {
2328         my $format = shift || 'Atom';
2329         my %res = (action => lc($format));
2330
2331         # feed links are possible only for project views
2332         return unless (defined $project);
2333         # some views should link to OPML, or to generic project feed,
2334         # or don't have specific feed yet (so they should use generic)
2335         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2336
2337         my $branch;
2338         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2339         # from tag links; this also makes possible to detect branch links
2340         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2341             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2342                 $branch = $1;
2343         }
2344         # find log type for feed description (title)
2345         my $type = 'log';
2346         if (defined $file_name) {
2347                 $type  = "history of $file_name";
2348                 $type .= "/" if ($action eq 'tree');
2349                 $type .= " on '$branch'" if (defined $branch);
2350         } else {
2351                 $type = "log of $branch" if (defined $branch);
2352         }
2353
2354         $res{-title} = $type;
2355         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2356         $res{'file_name'} = $file_name;
2357
2358         return %res;
2359 }
2360
2361 ## ----------------------------------------------------------------------
2362 ## git utility subroutines, invoking git commands
2363
2364 # returns path to the core git executable and the --git-dir parameter as list
2365 sub git_cmd {
2366         $number_of_git_cmds++;
2367         return $GIT, '--git-dir='.$git_dir;
2368 }
2369
2370 # quote the given arguments for passing them to the shell
2371 # quote_command("command", "arg 1", "arg with ' and ! characters")
2372 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2373 # Try to avoid using this function wherever possible.
2374 sub quote_command {
2375         return join(' ',
2376                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2377 }
2378
2379 # get HEAD ref of given project as hash
2380 sub git_get_head_hash {
2381         return git_get_full_hash(shift, 'HEAD');
2382 }
2383
2384 sub git_get_full_hash {
2385         return git_get_hash(@_);
2386 }
2387
2388 sub git_get_short_hash {
2389         return git_get_hash(@_, '--short=7');
2390 }
2391
2392 sub git_get_hash {
2393         my ($project, $hash, @options) = @_;
2394         my $o_git_dir = $git_dir;
2395         my $retval = undef;
2396         $git_dir = "$projectroot/$project";
2397         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2398             '--verify', '-q', @options, $hash) {
2399                 $retval = <$fd>;
2400                 chomp $retval if defined $retval;
2401                 close $fd;
2402         }
2403         if (defined $o_git_dir) {
2404                 $git_dir = $o_git_dir;
2405         }
2406         return $retval;
2407 }
2408
2409 # get type of given object
2410 sub git_get_type {
2411         my $hash = shift;
2412
2413         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2414         my $type = <$fd>;
2415         close $fd or return;
2416         chomp $type;
2417         return $type;
2418 }
2419
2420 # repository configuration
2421 our $config_file = '';
2422 our %config;
2423
2424 # store multiple values for single key as anonymous array reference
2425 # single values stored directly in the hash, not as [ <value> ]
2426 sub hash_set_multi {
2427         my ($hash, $key, $value) = @_;
2428
2429         if (!exists $hash->{$key}) {
2430                 $hash->{$key} = $value;
2431         } elsif (!ref $hash->{$key}) {
2432                 $hash->{$key} = [ $hash->{$key}, $value ];
2433         } else {
2434                 push @{$hash->{$key}}, $value;
2435         }
2436 }
2437
2438 # return hash of git project configuration
2439 # optionally limited to some section, e.g. 'gitweb'
2440 sub git_parse_project_config {
2441         my $section_regexp = shift;
2442         my %config;
2443
2444         local $/ = "\0";
2445
2446         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2447                 or return;
2448
2449         while (my $keyval = <$fh>) {
2450                 chomp $keyval;
2451                 my ($key, $value) = split(/\n/, $keyval, 2);
2452
2453                 hash_set_multi(\%config, $key, $value)
2454                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2455         }
2456         close $fh;
2457
2458         return %config;
2459 }
2460
2461 # convert config value to boolean: 'true' or 'false'
2462 # no value, number > 0, 'true' and 'yes' values are true
2463 # rest of values are treated as false (never as error)
2464 sub config_to_bool {
2465         my $val = shift;
2466
2467         return 1 if !defined $val;             # section.key
2468
2469         # strip leading and trailing whitespace
2470         $val =~ s/^\s+//;
2471         $val =~ s/\s+$//;
2472
2473         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2474                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2475 }
2476
2477 # convert config value to simple decimal number
2478 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2479 # to be multiplied by 1024, 1048576, or 1073741824
2480 sub config_to_int {
2481         my $val = shift;
2482
2483         # strip leading and trailing whitespace
2484         $val =~ s/^\s+//;
2485         $val =~ s/\s+$//;
2486
2487         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2488                 $unit = lc($unit);
2489                 # unknown unit is treated as 1
2490                 return $num * ($unit eq 'g' ? 1073741824 :
2491                                $unit eq 'm' ?    1048576 :
2492                                $unit eq 'k' ?       1024 : 1);
2493         }
2494         return $val;
2495 }
2496
2497 # convert config value to array reference, if needed
2498 sub config_to_multi {
2499         my $val = shift;
2500
2501         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2502 }
2503
2504 sub git_get_project_config {
2505         my ($key, $type) = @_;
2506
2507         return unless defined $git_dir;
2508
2509         # key sanity check
2510         return unless ($key);
2511         $key =~ s/^gitweb\.//;
2512         return if ($key =~ m/\W/);
2513
2514         # type sanity check
2515         if (defined $type) {
2516                 $type =~ s/^--//;
2517                 $type = undef
2518                         unless ($type eq 'bool' || $type eq 'int');
2519         }
2520
2521         # get config
2522         if (!defined $config_file ||
2523             $config_file ne "$git_dir/config") {
2524                 %config = git_parse_project_config('gitweb');
2525                 $config_file = "$git_dir/config";
2526         }
2527
2528         # check if config variable (key) exists
2529         return unless exists $config{"gitweb.$key"};
2530
2531         # ensure given type
2532         if (!defined $type) {
2533                 return $config{"gitweb.$key"};
2534         } elsif ($type eq 'bool') {
2535                 # backward compatibility: 'git config --bool' returns true/false
2536                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2537         } elsif ($type eq 'int') {
2538                 return config_to_int($config{"gitweb.$key"});
2539         }
2540         return $config{"gitweb.$key"};
2541 }
2542
2543 # get hash of given path at given ref
2544 sub git_get_hash_by_path {
2545         my $base = shift;
2546         my $path = shift || return undef;
2547         my $type = shift;
2548
2549         $path =~ s,/+$,,;
2550
2551         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2552                 or die_error(500, "Open git-ls-tree failed");
2553         my $line = <$fd>;
2554         close $fd or return undef;
2555
2556         if (!defined $line) {
2557                 # there is no tree or hash given by $path at $base
2558                 return undef;
2559         }
2560
2561         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2562         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2563         if (defined $type && $type ne $2) {
2564                 # type doesn't match
2565                 return undef;
2566         }
2567         return $3;
2568 }
2569
2570 # get path of entry with given hash at given tree-ish (ref)
2571 # used to get 'from' filename for combined diff (merge commit) for renames
2572 sub git_get_path_by_hash {
2573         my $base = shift || return;
2574         my $hash = shift || return;
2575
2576         local $/ = "\0";
2577
2578         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2579                 or return undef;
2580         while (my $line = <$fd>) {
2581                 chomp $line;
2582
2583                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2584                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2585                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2586                         close $fd;
2587                         return $1;
2588                 }
2589         }
2590         close $fd;
2591         return undef;
2592 }
2593
2594 ## ......................................................................
2595 ## git utility functions, directly accessing git repository
2596
2597 # get the value of config variable either from file named as the variable
2598 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2599 # configuration variable in the repository config file.
2600 sub git_get_file_or_project_config {
2601         my ($path, $name) = @_;
2602
2603         $git_dir = "$projectroot/$path";
2604         open my $fd, '<', "$git_dir/$name"
2605                 or return git_get_project_config($name);
2606         my $conf = <$fd>;
2607         close $fd;
2608         if (defined $conf) {
2609                 chomp $conf;
2610         }
2611         return $conf;
2612 }
2613
2614 sub git_get_project_description {
2615         my $path = shift;
2616         return git_get_file_or_project_config($path, 'description');
2617 }
2618
2619 sub git_get_project_category {
2620         my $path = shift;
2621         return git_get_file_or_project_config($path, 'category');
2622 }
2623
2624
2625 # supported formats:
2626 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2627 #   - if its contents is a number, use it as tag weight,
2628 #   - otherwise add a tag with weight 1
2629 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2630 #   the same value multiple times increases tag weight
2631 # * `gitweb.ctag' multi-valued repo config variable
2632 sub git_get_project_ctags {
2633         my $project = shift;
2634         my $ctags = {};
2635
2636         $git_dir = "$projectroot/$project";
2637         if (opendir my $dh, "$git_dir/ctags") {
2638                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2639                 foreach my $tagfile (@files) {
2640                         open my $ct, '<', $tagfile
2641                                 or next;
2642                         my $val = <$ct>;
2643                         chomp $val if $val;
2644                         close $ct;
2645
2646                         (my $ctag = $tagfile) =~ s#.*/##;
2647                         if ($val =~ /\d+/) {
2648                                 $ctags->{$ctag} = $val;
2649                         } else {
2650                                 $ctags->{$ctag} = 1;
2651                         }
2652                 }
2653                 closedir $dh;
2654
2655         } elsif (open my $fh, '<', "$git_dir/ctags") {
2656                 while (my $line = <$fh>) {
2657                         chomp $line;
2658                         $ctags->{$line}++ if $line;
2659                 }
2660                 close $fh;
2661
2662         } else {
2663                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2664                 foreach my $tag (@$taglist) {
2665                         $ctags->{$tag}++;
2666                 }
2667         }
2668
2669         return $ctags;
2670 }
2671
2672 # return hash, where keys are content tags ('ctags'),
2673 # and values are sum of weights of given tag in every project
2674 sub git_gather_all_ctags {
2675         my $projects = shift;
2676         my $ctags = {};
2677
2678         foreach my $p (@$projects) {
2679                 foreach my $ct (keys %{$p->{'ctags'}}) {
2680                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2681                 }
2682         }
2683
2684         return $ctags;
2685 }
2686
2687 sub git_populate_project_tagcloud {
2688         my $ctags = shift;
2689
2690         # First, merge different-cased tags; tags vote on casing
2691         my %ctags_lc;
2692         foreach (keys %$ctags) {
2693                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2694                 if (not $ctags_lc{lc $_}->{topcount}
2695                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2696                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2697                         $ctags_lc{lc $_}->{topname} = $_;
2698                 }
2699         }
2700
2701         my $cloud;
2702         my $matched = $cgi->param('by_tag');
2703         if (eval { require HTML::TagCloud; 1; }) {
2704                 $cloud = HTML::TagCloud->new;
2705                 foreach my $ctag (sort keys %ctags_lc) {
2706                         # Pad the title with spaces so that the cloud looks
2707                         # less crammed.
2708                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2709                         $title =~ s/ /&nbsp;/g;
2710                         $title =~ s/^/&nbsp;/g;
2711                         $title =~ s/$/&nbsp;/g;
2712                         if (defined $matched && $matched eq $ctag) {
2713                                 $title = qq(<span class="match">$title</span>);
2714                         }
2715                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2716                                     $ctags_lc{$ctag}->{count});
2717                 }
2718         } else {
2719                 $cloud = {};
2720                 foreach my $ctag (keys %ctags_lc) {
2721                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2722                         if (defined $matched && $matched eq $ctag) {
2723                                 $title = qq(<span class="match">$title</span>);
2724                         }
2725                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2726                         $cloud->{$ctag}{ctag} =
2727                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2728                 }
2729         }
2730         return $cloud;
2731 }
2732
2733 sub git_show_project_tagcloud {
2734         my ($cloud, $count) = @_;
2735         if (ref $cloud eq 'HTML::TagCloud') {
2736                 return $cloud->html_and_css($count);
2737         } else {
2738                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2739                 return
2740                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2741                         join (', ', map {
2742                                 $cloud->{$_}->{'ctag'}
2743                         } splice(@tags, 0, $count)) .
2744                         '</div>';
2745         }
2746 }
2747
2748 sub git_get_project_url_list {
2749         my $path = shift;
2750
2751         $git_dir = "$projectroot/$path";
2752         open my $fd, '<', "$git_dir/cloneurl"
2753                 or return wantarray ?
2754                 @{ config_to_multi(git_get_project_config('url')) } :
2755                    config_to_multi(git_get_project_config('url'));
2756         my @git_project_url_list = map { chomp; $_ } <$fd>;
2757         close $fd;
2758
2759         return wantarray ? @git_project_url_list : \@git_project_url_list;
2760 }
2761
2762 sub git_get_projects_list {
2763         my $filter = shift || '';
2764         my @list;
2765
2766         $filter =~ s/\.git$//;
2767
2768         if (-d $projects_list) {
2769                 # search in directory
2770                 my $dir = $projects_list;
2771                 # remove the trailing "/"
2772                 $dir =~ s!/+$!!;
2773                 my $pfxlen = length("$projects_list");
2774                 my $pfxdepth = ($projects_list =~ tr!/!!);
2775                 # when filtering, search only given subdirectory
2776                 if ($filter) {
2777                         $dir .= "/$filter";
2778                         $dir =~ s!/+$!!;
2779                 }
2780
2781                 File::Find::find({
2782                         follow_fast => 1, # follow symbolic links
2783                         follow_skip => 2, # ignore duplicates
2784                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2785                         wanted => sub {
2786                                 # global variables
2787                                 our $project_maxdepth;
2788                                 our $projectroot;
2789                                 # skip project-list toplevel, if we get it.
2790                                 return if (m!^[/.]$!);
2791                                 # only directories can be git repositories
2792                                 return unless (-d $_);
2793                                 # don't traverse too deep (Find is super slow on os x)
2794                                 # $project_maxdepth excludes depth of $projectroot
2795                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2796                                         $File::Find::prune = 1;
2797                                         return;
2798                                 }
2799
2800                                 my $path = substr($File::Find::name, $pfxlen + 1);
2801                                 # we check related file in $projectroot
2802                                 if (check_export_ok("$projectroot/$path")) {
2803                                         push @list, { path => $path };
2804                                         $File::Find::prune = 1;
2805                                 }
2806                         },
2807                 }, "$dir");
2808
2809         } elsif (-f $projects_list) {
2810                 # read from file(url-encoded):
2811                 # 'git%2Fgit.git Linus+Torvalds'
2812                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2813                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2814                 open my $fd, '<', $projects_list or return;
2815         PROJECT:
2816                 while (my $line = <$fd>) {
2817                         chomp $line;
2818                         my ($path, $owner) = split ' ', $line;
2819                         $path = unescape($path);
2820                         $owner = unescape($owner);
2821                         if (!defined $path) {
2822                                 next;
2823                         }
2824                         # if $filter is rpovided, check if $path begins with $filter
2825                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2826                                 next;
2827                         }
2828                         if (check_export_ok("$projectroot/$path")) {
2829                                 my $pr = {
2830                                         path => $path,
2831                                         owner => to_utf8($owner),
2832                                 };
2833                                 push @list, $pr;
2834                         }
2835                 }
2836                 close $fd;
2837         }
2838         return @list;
2839 }
2840
2841 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2842 # as side effects it sets 'forks' field to list of forks for forked projects
2843 sub filter_forks_from_projects_list {
2844         my $projects = shift;
2845
2846         my %trie; # prefix tree of directories (path components)
2847         # generate trie out of those directories that might contain forks
2848         foreach my $pr (@$projects) {
2849                 my $path = $pr->{'path'};
2850                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2851                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2852                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2853                 next unless (-d $path);   # containing directory exists
2854                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2855
2856                 # add to trie
2857                 my @dirs = split('/', $path);
2858                 # walk the trie, until either runs out of components or out of trie
2859                 my $ref = \%trie;
2860                 while (scalar @dirs &&
2861                        exists($ref->{$dirs[0]})) {
2862                         $ref = $ref->{shift @dirs};
2863                 }
2864                 # create rest of trie structure from rest of components
2865                 foreach my $dir (@dirs) {
2866                         $ref = $ref->{$dir} = {};
2867                 }
2868                 # create end marker, store $pr as a data
2869                 $ref->{''} = $pr if (!exists $ref->{''});
2870         }
2871
2872         # filter out forks, by finding shortest prefix match for paths
2873         my @filtered;
2874  PROJECT:
2875         foreach my $pr (@$projects) {
2876                 # trie lookup
2877                 my $ref = \%trie;
2878         DIR:
2879                 foreach my $dir (split('/', $pr->{'path'})) {
2880                         if (exists $ref->{''}) {
2881                                 # found [shortest] prefix, is a fork - skip it
2882                                 push @{$ref->{''}{'forks'}}, $pr;
2883                                 next PROJECT;
2884                         }
2885                         if (!exists $ref->{$dir}) {
2886                                 # not in trie, cannot have prefix, not a fork
2887                                 push @filtered, $pr;
2888                                 next PROJECT;
2889                         }
2890                         # If the dir is there, we just walk one step down the trie.
2891                         $ref = $ref->{$dir};
2892                 }
2893                 # we ran out of trie
2894                 # (shouldn't happen: it's either no match, or end marker)
2895                 push @filtered, $pr;
2896         }
2897
2898         return @filtered;
2899 }
2900
2901 # note: fill_project_list_info must be run first,
2902 # for 'descr_long' and 'ctags' to be filled
2903 sub search_projects_list {
2904         my ($projlist, %opts) = @_;
2905         my $tagfilter  = $opts{'tagfilter'};
2906         my $searchtext = $opts{'searchtext'};
2907
2908         return @$projlist
2909                 unless ($tagfilter || $searchtext);
2910
2911         my @projects;
2912  PROJECT:
2913         foreach my $pr (@$projlist) {
2914
2915                 if ($tagfilter) {
2916                         next unless ref($pr->{'ctags'}) eq 'HASH';
2917                         next unless
2918                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2919                 }
2920
2921                 if ($searchtext) {
2922                         next unless
2923                                 $pr->{'path'} =~ /$searchtext/ ||
2924                                 $pr->{'descr_long'} =~ /$searchtext/;
2925                 }
2926
2927                 push @projects, $pr;
2928         }
2929
2930         return @projects;
2931 }
2932
2933 our $gitweb_project_owner = undef;
2934 sub git_get_project_list_from_file {
2935
2936         return if (defined $gitweb_project_owner);
2937
2938         $gitweb_project_owner = {};
2939         # read from file (url-encoded):
2940         # 'git%2Fgit.git Linus+Torvalds'
2941         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2942         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2943         if (-f $projects_list) {
2944                 open(my $fd, '<', $projects_list);
2945                 while (my $line = <$fd>) {
2946                         chomp $line;
2947                         my ($pr, $ow) = split ' ', $line;
2948                         $pr = unescape($pr);
2949                         $ow = unescape($ow);
2950                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2951                 }
2952                 close $fd;
2953         }
2954 }
2955
2956 sub git_get_project_owner {
2957         my $project = shift;
2958         my $owner;
2959
2960         return undef unless $project;
2961         $git_dir = "$projectroot/$project";
2962
2963         if (!defined $gitweb_project_owner) {
2964                 git_get_project_list_from_file();
2965         }
2966
2967         if (exists $gitweb_project_owner->{$project}) {
2968                 $owner = $gitweb_project_owner->{$project};
2969         }
2970         if (!defined $owner){
2971                 $owner = git_get_project_config('owner');
2972         }
2973         if (!defined $owner) {
2974                 $owner = get_file_owner("$git_dir");
2975         }
2976
2977         return $owner;
2978 }
2979
2980 sub git_get_last_activity {
2981         my ($path) = @_;
2982         my $fd;
2983
2984         $git_dir = "$projectroot/$path";
2985         open($fd, "-|", git_cmd(), 'for-each-ref',
2986              '--format=%(committer)',
2987              '--sort=-committerdate',
2988              '--count=1',
2989              'refs/heads') or return;
2990         my $most_recent = <$fd>;
2991         close $fd or return;
2992         if (defined $most_recent &&
2993             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2994                 my $timestamp = $1;
2995                 my $age = time - $timestamp;
2996                 return ($age, age_string($age));
2997         }
2998         return (undef, undef);
2999 }
3000
3001 # Implementation note: when a single remote is wanted, we cannot use 'git
3002 # remote show -n' because that command always work (assuming it's a remote URL
3003 # if it's not defined), and we cannot use 'git remote show' because that would
3004 # try to make a network roundtrip. So the only way to find if that particular
3005 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3006 # and when we find what we want.
3007 sub git_get_remotes_list {
3008         my $wanted = shift;
3009         my %remotes = ();
3010
3011         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3012         return unless $fd;
3013         while (my $remote = <$fd>) {
3014                 chomp $remote;
3015                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3016                 next if $wanted and not $remote eq $wanted;
3017                 my ($url, $key) = ($1, $2);
3018
3019                 $remotes{$remote} ||= { 'heads' => () };
3020                 $remotes{$remote}{$key} = $url;
3021         }
3022         close $fd or return;
3023         return wantarray ? %remotes : \%remotes;
3024 }
3025
3026 # Takes a hash of remotes as first parameter and fills it by adding the
3027 # available remote heads for each of the indicated remotes.
3028 sub fill_remote_heads {
3029         my $remotes = shift;
3030         my @heads = map { "remotes/$_" } keys %$remotes;
3031         my @remoteheads = git_get_heads_list(undef, @heads);
3032         foreach my $remote (keys %$remotes) {
3033                 $remotes->{$remote}{'heads'} = [ grep {
3034                         $_->{'name'} =~ s!^$remote/!!
3035                         } @remoteheads ];
3036         }
3037 }
3038
3039 sub git_get_references {
3040         my $type = shift || "";
3041         my %refs;
3042         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3043         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3044         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3045                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3046                 or return;
3047
3048         while (my $line = <$fd>) {
3049                 chomp $line;
3050                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3051                         if (defined $refs{$1}) {
3052                                 push @{$refs{$1}}, $2;
3053                         } else {
3054                                 $refs{$1} = [ $2 ];
3055                         }
3056                 }
3057         }
3058         close $fd or return;
3059         return \%refs;
3060 }
3061
3062 sub git_get_rev_name_tags {
3063         my $hash = shift || return undef;
3064
3065         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3066                 or return;
3067         my $name_rev = <$fd>;
3068         close $fd;
3069
3070         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3071                 return $1;
3072         } else {
3073                 # catches also '$hash undefined' output
3074                 return undef;
3075         }
3076 }
3077
3078 ## ----------------------------------------------------------------------
3079 ## parse to hash functions
3080
3081 sub parse_date {
3082         my $epoch = shift;
3083         my $tz = shift || "-0000";
3084
3085         my %date;
3086         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3087         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3088         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3089         $date{'hour'} = $hour;
3090         $date{'minute'} = $min;
3091         $date{'mday'} = $mday;
3092         $date{'day'} = $days[$wday];
3093         $date{'month'} = $months[$mon];
3094         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3095                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3096         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3097                              $mday, $months[$mon], $hour ,$min;
3098         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3099                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3100
3101         my ($tz_sign, $tz_hour, $tz_min) =
3102                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3103         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3104         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3105         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3106         $date{'hour_local'} = $hour;
3107         $date{'minute_local'} = $min;
3108         $date{'tz_local'} = $tz;
3109         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3110                                   1900+$year, $mon+1, $mday,
3111                                   $hour, $min, $sec, $tz);
3112         return %date;
3113 }
3114
3115 sub parse_tag {
3116         my $tag_id = shift;
3117         my %tag;
3118         my @comment;
3119
3120         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3121         $tag{'id'} = $tag_id;
3122         while (my $line = <$fd>) {
3123                 chomp $line;
3124                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3125                         $tag{'object'} = $1;
3126                 } elsif ($line =~ m/^type (.+)$/) {
3127                         $tag{'type'} = $1;
3128                 } elsif ($line =~ m/^tag (.+)$/) {
3129                         $tag{'name'} = $1;
3130                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3131                         $tag{'author'} = $1;
3132                         $tag{'author_epoch'} = $2;
3133                         $tag{'author_tz'} = $3;
3134                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3135                                 $tag{'author_name'}  = $1;
3136                                 $tag{'author_email'} = $2;
3137                         } else {
3138                                 $tag{'author_name'} = $tag{'author'};
3139                         }
3140                 } elsif ($line =~ m/--BEGIN/) {
3141                         push @comment, $line;
3142                         last;
3143                 } elsif ($line eq "") {
3144                         last;
3145                 }
3146         }
3147         push @comment, <$fd>;
3148         $tag{'comment'} = \@comment;
3149         close $fd or return;
3150         if (!defined $tag{'name'}) {
3151                 return
3152         };
3153         return %tag
3154 }
3155
3156 sub parse_commit_text {
3157         my ($commit_text, $withparents) = @_;
3158         my @commit_lines = split '\n', $commit_text;
3159         my %co;
3160
3161         pop @commit_lines; # Remove '\0'
3162
3163         if (! @commit_lines) {
3164                 return;
3165         }
3166
3167         my $header = shift @commit_lines;
3168         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3169                 return;
3170         }
3171         ($co{'id'}, my @parents) = split ' ', $header;
3172         while (my $line = shift @commit_lines) {
3173                 last if $line eq "\n";
3174                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3175                         $co{'tree'} = $1;
3176                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3177                         push @parents, $1;
3178                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3179                         $co{'author'} = to_utf8($1);
3180                         $co{'author_epoch'} = $2;
3181                         $co{'author_tz'} = $3;
3182                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3183                                 $co{'author_name'}  = $1;
3184                                 $co{'author_email'} = $2;
3185                         } else {
3186                                 $co{'author_name'} = $co{'author'};
3187                         }
3188                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3189                         $co{'committer'} = to_utf8($1);
3190                         $co{'committer_epoch'} = $2;
3191                         $co{'committer_tz'} = $3;
3192                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3193                                 $co{'committer_name'}  = $1;
3194                                 $co{'committer_email'} = $2;
3195                         } else {
3196                                 $co{'committer_name'} = $co{'committer'};
3197                         }
3198                 }
3199         }
3200         if (!defined $co{'tree'}) {
3201                 return;
3202         };
3203         $co{'parents'} = \@parents;
3204         $co{'parent'} = $parents[0];
3205
3206         foreach my $title (@commit_lines) {
3207                 $title =~ s/^    //;
3208                 if ($title ne "") {
3209                         $co{'title'} = chop_str($title, 80, 5);
3210                         # remove leading stuff of merges to make the interesting part visible
3211                         if (length($title) > 50) {
3212                                 $title =~ s/^Automatic //;
3213                                 $title =~ s/^merge (of|with) /Merge ... /i;
3214                                 if (length($title) > 50) {
3215                                         $title =~ s/(http|rsync):\/\///;
3216                                 }
3217                                 if (length($title) > 50) {
3218                                         $title =~ s/(master|www|rsync)\.//;
3219                                 }
3220                                 if (length($title) > 50) {
3221                                         $title =~ s/kernel.org:?//;
3222                                 }
3223                                 if (length($title) > 50) {
3224                                         $title =~ s/\/pub\/scm//;
3225                                 }
3226                         }
3227                         $co{'title_short'} = chop_str($title, 50, 5);
3228                         last;
3229                 }
3230         }
3231         if (! defined $co{'title'} || $co{'title'} eq "") {
3232                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3233         }
3234         # remove added spaces
3235         foreach my $line (@commit_lines) {
3236                 $line =~ s/^    //;
3237         }
3238         $co{'comment'} = \@commit_lines;
3239
3240         my $age = time - $co{'committer_epoch'};
3241         $co{'age'} = $age;
3242         $co{'age_string'} = age_string($age);
3243         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3244         if ($age > 60*60*24*7*2) {
3245                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3246                 $co{'age_string_age'} = $co{'age_string'};
3247         } else {
3248                 $co{'age_string_date'} = $co{'age_string'};
3249                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3250         }
3251         return %co;
3252 }
3253
3254 sub parse_commit {
3255         my ($commit_id) = @_;
3256         my %co;
3257
3258         local $/ = "\0";
3259
3260         open my $fd, "-|", git_cmd(), "rev-list",
3261                 "--parents",
3262                 "--header",
3263                 "--max-count=1",
3264                 $commit_id,
3265                 "--",
3266                 or die_error(500, "Open git-rev-list failed");
3267         %co = parse_commit_text(<$fd>, 1);
3268         close $fd;
3269
3270         return %co;
3271 }
3272
3273 sub parse_commits {
3274         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3275         my @cos;
3276
3277         $maxcount ||= 1;
3278         $skip ||= 0;
3279
3280         local $/ = "\0";
3281
3282         open my $fd, "-|", git_cmd(), "rev-list",
3283                 "--header",
3284                 @args,
3285                 ("--max-count=" . $maxcount),
3286                 ("--skip=" . $skip),
3287                 @extra_options,
3288                 $commit_id,
3289                 "--",
3290                 ($filename ? ($filename) : ())
3291                 or die_error(500, "Open git-rev-list failed");
3292         while (my $line = <$fd>) {
3293                 my %co = parse_commit_text($line);
3294                 push @cos, \%co;
3295         }
3296         close $fd;
3297
3298         return wantarray ? @cos : \@cos;
3299 }
3300
3301 # parse line of git-diff-tree "raw" output
3302 sub parse_difftree_raw_line {
3303         my $line = shift;
3304         my %res;
3305
3306         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3307         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3308         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3309                 $res{'from_mode'} = $1;
3310                 $res{'to_mode'} = $2;
3311                 $res{'from_id'} = $3;
3312                 $res{'to_id'} = $4;
3313                 $res{'status'} = $5;
3314                 $res{'similarity'} = $6;
3315                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3316                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3317                 } else {
3318                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3319                 }
3320         }
3321         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3322         # combined diff (for merge commit)
3323         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3324                 $res{'nparents'}  = length($1);
3325                 $res{'from_mode'} = [ split(' ', $2) ];
3326                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3327                 $res{'from_id'} = [ split(' ', $3) ];
3328                 $res{'to_id'} = pop @{$res{'from_id'}};
3329                 $res{'status'} = [ split('', $4) ];
3330                 $res{'to_file'} = unquote($5);
3331         }
3332         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3333         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3334                 $res{'commit'} = $1;
3335         }
3336
3337         return wantarray ? %res : \%res;
3338 }
3339
3340 # wrapper: return parsed line of git-diff-tree "raw" output
3341 # (the argument might be raw line, or parsed info)
3342 sub parsed_difftree_line {
3343         my $line_or_ref = shift;
3344
3345         if (ref($line_or_ref) eq "HASH") {
3346                 # pre-parsed (or generated by hand)
3347                 return $line_or_ref;
3348         } else {
3349                 return parse_difftree_raw_line($line_or_ref);
3350         }
3351 }
3352
3353 # parse line of git-ls-tree output
3354 sub parse_ls_tree_line {
3355         my $line = shift;
3356         my %opts = @_;
3357         my %res;
3358
3359         if ($opts{'-l'}) {
3360                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3361                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3362
3363                 $res{'mode'} = $1;
3364                 $res{'type'} = $2;
3365                 $res{'hash'} = $3;
3366                 $res{'size'} = $4;
3367                 if ($opts{'-z'}) {
3368                         $res{'name'} = $5;
3369                 } else {
3370                         $res{'name'} = unquote($5);
3371                 }
3372         } else {
3373                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3374                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3375
3376                 $res{'mode'} = $1;
3377                 $res{'type'} = $2;
3378                 $res{'hash'} = $3;
3379                 if ($opts{'-z'}) {
3380                         $res{'name'} = $4;
3381                 } else {
3382                         $res{'name'} = unquote($4);
3383                 }
3384         }
3385
3386         return wantarray ? %res : \%res;
3387 }
3388
3389 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3390 sub parse_from_to_diffinfo {
3391         my ($diffinfo, $from, $to, @parents) = @_;
3392
3393         if ($diffinfo->{'nparents'}) {
3394                 # combined diff
3395                 $from->{'file'} = [];
3396                 $from->{'href'} = [];
3397                 fill_from_file_info($diffinfo, @parents)
3398                         unless exists $diffinfo->{'from_file'};
3399                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3400                         $from->{'file'}[$i] =
3401                                 defined $diffinfo->{'from_file'}[$i] ?
3402                                         $diffinfo->{'from_file'}[$i] :
3403                                         $diffinfo->{'to_file'};
3404                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3405                                 $from->{'href'}[$i] = href(action=>"blob",
3406                                                            hash_base=>$parents[$i],
3407                                                            hash=>$diffinfo->{'from_id'}[$i],
3408                                                            file_name=>$from->{'file'}[$i]);
3409                         } else {
3410                                 $from->{'href'}[$i] = undef;
3411                         }
3412                 }
3413         } else {
3414                 # ordinary (not combined) diff
3415                 $from->{'file'} = $diffinfo->{'from_file'};
3416                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3417                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3418                                                hash=>$diffinfo->{'from_id'},
3419                                                file_name=>$from->{'file'});
3420                 } else {
3421                         delete $from->{'href'};
3422                 }
3423         }
3424
3425         $to->{'file'} = $diffinfo->{'to_file'};
3426         if (!is_deleted($diffinfo)) { # file exists in result
3427                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3428                                      hash=>$diffinfo->{'to_id'},
3429                                      file_name=>$to->{'file'});
3430         } else {
3431                 delete $to->{'href'};
3432         }
3433 }
3434
3435 ## ......................................................................
3436 ## parse to array of hashes functions
3437
3438 sub git_get_heads_list {
3439         my ($limit, @classes) = @_;
3440         @classes = ('heads') unless @classes;
3441         my @patterns = map { "refs/$_" } @classes;
3442         my @headslist;
3443
3444         open my $fd, '-|', git_cmd(), 'for-each-ref',
3445                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3446                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3447                 @patterns
3448                 or return;
3449         while (my $line = <$fd>) {
3450                 my %ref_item;
3451
3452                 chomp $line;
3453                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3454                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3455                 my ($committer, $epoch, $tz) =
3456                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3457                 $ref_item{'fullname'}  = $name;
3458                 $name =~ s!^refs/(?:head|remote)s/!!;
3459
3460                 $ref_item{'name'}  = $name;
3461                 $ref_item{'id'}    = $hash;
3462                 $ref_item{'title'} = $title || '(no commit message)';
3463                 $ref_item{'epoch'} = $epoch;
3464                 if ($epoch) {
3465                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3466                 } else {
3467                         $ref_item{'age'} = "unknown";
3468                 }
3469
3470                 push @headslist, \%ref_item;
3471         }
3472         close $fd;
3473
3474         return wantarray ? @headslist : \@headslist;
3475 }
3476
3477 sub git_get_tags_list {
3478         my $limit = shift;
3479         my @tagslist;
3480
3481         open my $fd, '-|', git_cmd(), 'for-each-ref',
3482                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3483                 '--format=%(objectname) %(objecttype) %(refname) '.
3484                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3485                 'refs/tags'
3486                 or return;
3487         while (my $line = <$fd>) {
3488                 my %ref_item;
3489
3490                 chomp $line;
3491                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3492                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3493                 my ($creator, $epoch, $tz) =
3494                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3495                 $ref_item{'fullname'} = $name;
3496                 $name =~ s!^refs/tags/!!;
3497
3498                 $ref_item{'type'} = $type;
3499                 $ref_item{'id'} = $id;
3500                 $ref_item{'name'} = $name;
3501                 if ($type eq "tag") {
3502                         $ref_item{'subject'} = $title;
3503                         $ref_item{'reftype'} = $reftype;
3504                         $ref_item{'refid'}   = $refid;
3505                 } else {
3506                         $ref_item{'reftype'} = $type;
3507                         $ref_item{'refid'}   = $id;
3508                 }
3509
3510                 if ($type eq "tag" || $type eq "commit") {
3511                         $ref_item{'epoch'} = $epoch;
3512                         if ($epoch) {
3513                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3514                         } else {
3515                                 $ref_item{'age'} = "unknown";
3516                         }
3517                 }
3518
3519                 push @tagslist, \%ref_item;
3520         }
3521         close $fd;
3522
3523         return wantarray ? @tagslist : \@tagslist;
3524 }
3525
3526 ## ----------------------------------------------------------------------
3527 ## filesystem-related functions
3528
3529 sub get_file_owner {
3530         my $path = shift;
3531
3532         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3533         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3534         if (!defined $gcos) {
3535                 return undef;
3536         }
3537         my $owner = $gcos;
3538         $owner =~ s/[,;].*$//;
3539         return to_utf8($owner);
3540 }
3541
3542 # assume that file exists
3543 sub insert_file {
3544         my $filename = shift;
3545
3546         open my $fd, '<', $filename;
3547         print map { to_utf8($_) } <$fd>;
3548         close $fd;
3549 }
3550
3551 ## ......................................................................
3552 ## mimetype related functions
3553
3554 sub mimetype_guess_file {
3555         my $filename = shift;
3556         my $mimemap = shift;
3557         -r $mimemap or return undef;
3558
3559         my %mimemap;
3560         open(my $mh, '<', $mimemap) or return undef;
3561         while (<$mh>) {
3562                 next if m/^#/; # skip comments
3563                 my ($mimetype, $exts) = split(/\t+/);
3564                 if (defined $exts) {
3565                         my @exts = split(/\s+/, $exts);
3566                         foreach my $ext (@exts) {
3567                                 $mimemap{$ext} = $mimetype;
3568                         }
3569                 }
3570         }
3571         close($mh);
3572
3573         $filename =~ /\.([^.]*)$/;
3574         return $mimemap{$1};
3575 }
3576
3577 sub mimetype_guess {
3578         my $filename = shift;
3579         my $mime;
3580         $filename =~ /\./ or return undef;
3581
3582         if ($mimetypes_file) {
3583                 my $file = $mimetypes_file;
3584                 if ($file !~ m!^/!) { # if it is relative path
3585                         # it is relative to project
3586                         $file = "$projectroot/$project/$file";
3587                 }
3588                 $mime = mimetype_guess_file($filename, $file);
3589         }
3590         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3591         return $mime;
3592 }
3593
3594 sub blob_mimetype {
3595         my $fd = shift;
3596         my $filename = shift;
3597
3598         if ($filename) {
3599                 my $mime = mimetype_guess($filename);
3600                 $mime and return $mime;
3601         }
3602
3603         # just in case
3604         return $default_blob_plain_mimetype unless $fd;
3605
3606         if (-T $fd) {
3607                 return 'text/plain';
3608         } elsif (! $filename) {
3609                 return 'application/octet-stream';
3610         } elsif ($filename =~ m/\.png$/i) {
3611                 return 'image/png';
3612         } elsif ($filename =~ m/\.gif$/i) {
3613                 return 'image/gif';
3614         } elsif ($filename =~ m/\.jpe?g$/i) {
3615                 return 'image/jpeg';
3616         } else {
3617                 return 'application/octet-stream';
3618         }
3619 }
3620
3621 sub blob_contenttype {
3622         my ($fd, $file_name, $type) = @_;
3623
3624         $type ||= blob_mimetype($fd, $file_name);
3625         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3626                 $type .= "; charset=$default_text_plain_charset";
3627         }
3628
3629         return $type;
3630 }
3631
3632 # guess file syntax for syntax highlighting; return undef if no highlighting
3633 # the name of syntax can (in the future) depend on syntax highlighter used
3634 sub guess_file_syntax {
3635         my ($highlight, $mimetype, $file_name) = @_;
3636         return undef unless ($highlight && defined $file_name);
3637         my $basename = basename($file_name, '.in');
3638         return $highlight_basename{$basename}
3639                 if exists $highlight_basename{$basename};
3640
3641         $basename =~ /\.([^.]*)$/;
3642         my $ext = $1 or return undef;
3643         return $highlight_ext{$ext}
3644                 if exists $highlight_ext{$ext};
3645
3646         return undef;
3647 }
3648
3649 # run highlighter and return FD of its output,
3650 # or return original FD if no highlighting
3651 sub run_highlighter {
3652         my ($fd, $highlight, $syntax) = @_;
3653         return $fd unless ($highlight && defined $syntax);
3654
3655         close $fd;
3656         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3657                   quote_command($highlight_bin).
3658                   " --replace-tabs=8 --fragment --syntax $syntax |"
3659                 or die_error(500, "Couldn't open file or run syntax highlighter");
3660         return $fd;
3661 }
3662
3663 ## ======================================================================
3664 ## functions printing HTML: header, footer, error page
3665
3666 sub get_page_title {
3667         my $title = to_utf8($site_name);
3668
3669         return $title unless (defined $project);
3670         $title .= " - " . to_utf8($project);
3671
3672         return $title unless (defined $action);
3673         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3674
3675         return $title unless (defined $file_name);
3676         $title .= " - " . esc_path($file_name);
3677         if ($action eq "tree" && $file_name !~ m|/$|) {
3678                 $title .= "/";
3679         }
3680
3681         return $title;
3682 }
3683
3684 sub print_feed_meta {
3685         if (defined $project) {
3686                 my %href_params = get_feed_info();
3687                 if (!exists $href_params{'-title'}) {
3688                         $href_params{'-title'} = 'log';
3689                 }
3690
3691                 foreach my $format (qw(RSS Atom)) {
3692                         my $type = lc($format);
3693                         my %link_attr = (
3694                                 '-rel' => 'alternate',
3695                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3696                                 '-type' => "application/$type+xml"
3697                         );
3698
3699                         $href_params{'action'} = $type;
3700                         $link_attr{'-href'} = href(%href_params);
3701                         print "<link ".
3702                               "rel=\"$link_attr{'-rel'}\" ".
3703                               "title=\"$link_attr{'-title'}\" ".
3704                               "href=\"$link_attr{'-href'}\" ".
3705                               "type=\"$link_attr{'-type'}\" ".
3706                               "/>\n";
3707
3708                         $href_params{'extra_options'} = '--no-merges';
3709                         $link_attr{'-href'} = href(%href_params);
3710                         $link_attr{'-title'} .= ' (no merges)';
3711                         print "<link ".
3712                               "rel=\"$link_attr{'-rel'}\" ".
3713                               "title=\"$link_attr{'-title'}\" ".
3714                               "href=\"$link_attr{'-href'}\" ".
3715                               "type=\"$link_attr{'-type'}\" ".
3716                               "/>\n";
3717                 }
3718
3719         } else {
3720                 printf('<link rel="alternate" title="%s projects list" '.
3721                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3722                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3723                 printf('<link rel="alternate" title="%s projects feeds" '.
3724                        'href="%s" type="text/x-opml" />'."\n",
3725                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3726         }
3727 }
3728
3729 sub git_header_html {
3730         my $status = shift || "200 OK";
3731         my $expires = shift;
3732         my %opts = @_;
3733
3734         my $title = get_page_title();
3735         my $content_type;
3736         # require explicit support from the UA if we are to send the page as
3737         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3738         # we have to do this because MSIE sometimes globs '*/*', pretending to
3739         # support xhtml+xml but choking when it gets what it asked for.
3740         if (defined $cgi->http('HTTP_ACCEPT') &&
3741             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3742             $cgi->Accept('application/xhtml+xml') != 0) {
3743                 $content_type = 'application/xhtml+xml';
3744         } else {
3745                 $content_type = 'text/html';
3746         }
3747         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3748                            -status=> $status, -expires => $expires)
3749                 unless ($opts{'-no_http_header'});
3750         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3751         print <<EOF;
3752 <?xml version="1.0" encoding="utf-8"?>
3753 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3754 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3755 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3756 <!-- git core binaries version $git_version -->
3757 <head>
3758 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3759 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3760 <meta name="robots" content="index, nofollow"/>
3761 <title>$title</title>
3762 EOF
3763         # the stylesheet, favicon etc urls won't work correctly with path_info
3764         # unless we set the appropriate base URL
3765         if ($ENV{'PATH_INFO'}) {
3766                 print "<base href=\"".esc_url($base_url)."\" />\n";
3767         }
3768         # print out each stylesheet that exist, providing backwards capability
3769         # for those people who defined $stylesheet in a config file
3770         if (defined $stylesheet) {
3771                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3772         } else {
3773                 foreach my $stylesheet (@stylesheets) {
3774                         next unless $stylesheet;
3775                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3776                 }
3777         }
3778         print_feed_meta()
3779                 if ($status eq '200 OK');
3780         if (defined $favicon) {
3781                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3782         }
3783
3784         print "</head>\n" .
3785               "<body>\n";
3786
3787         if (defined $site_header && -f $site_header) {
3788                 insert_file($site_header);
3789         }
3790
3791         print "<div class=\"page_header\">\n";
3792         if (defined $logo) {
3793                 print $cgi->a({-href => esc_url($logo_url),
3794                                -title => $logo_label},
3795                               $cgi->img({-src => esc_url($logo),
3796                                          -width => 72, -height => 27,
3797                                          -alt => "git",
3798                                          -class => "logo"}));
3799         }
3800         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3801         if (defined $project) {
3802                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3803                 if (defined $action) {
3804                         my $action_print = $action ;
3805                         if (defined $opts{-action_extra}) {
3806                                 $action_print = $cgi->a({-href => href(action=>$action)},
3807                                         $action);
3808                         }
3809                         print " / $action_print";
3810                 }
3811                 if (defined $opts{-action_extra}) {
3812                         print " / $opts{-action_extra}";
3813                 }
3814                 print "\n";
3815         }
3816         print "</div>\n";
3817
3818         my $have_search = gitweb_check_feature('search');
3819         if (defined $project && $have_search) {
3820                 if (!defined $searchtext) {
3821                         $searchtext = "";
3822                 }
3823                 my $search_hash;
3824                 if (defined $hash_base) {
3825                         $search_hash = $hash_base;
3826                 } elsif (defined $hash) {
3827                         $search_hash = $hash;
3828                 } else {
3829                         $search_hash = "HEAD";
3830                 }
3831                 my $action = $my_uri;
3832                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3833                 if ($use_pathinfo) {
3834                         $action .= "/".esc_url($project);
3835                 }
3836                 print $cgi->startform(-method => "get", -action => $action) .
3837                       "<div class=\"search\">\n" .
3838                       (!$use_pathinfo &&
3839                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3840                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3841                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3842                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3843                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3844                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3845                       " search:\n",
3846                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3847                       "<span title=\"Extended regular expression\">" .
3848                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3849                                      -checked => $search_use_regexp) .
3850                       "</span>" .
3851                       "</div>" .
3852                       $cgi->end_form() . "\n";
3853         }
3854 }
3855
3856 sub git_footer_html {
3857         my $feed_class = 'rss_logo';
3858
3859         print "<div class=\"page_footer\">\n";
3860         if (defined $project) {
3861                 my $descr = git_get_project_description($project);
3862                 if (defined $descr) {
3863                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3864                 }
3865
3866                 my %href_params = get_feed_info();
3867                 if (!%href_params) {
3868                         $feed_class .= ' generic';
3869                 }
3870                 $href_params{'-title'} ||= 'log';
3871
3872                 foreach my $format (qw(RSS Atom)) {
3873                         $href_params{'action'} = lc($format);
3874                         print $cgi->a({-href => href(%href_params),
3875                                       -title => "$href_params{'-title'} $format feed",
3876                                       -class => $feed_class}, $format)."\n";
3877                 }
3878
3879         } else {
3880                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3881                               -class => $feed_class}, "OPML") . " ";
3882                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3883                               -class => $feed_class}, "TXT") . "\n";
3884         }
3885         print "</div>\n"; # class="page_footer"
3886
3887         if (defined $t0 && gitweb_check_feature('timed')) {
3888                 print "<div id=\"generating_info\">\n";
3889                 print 'This page took '.
3890                       '<span id="generating_time" class="time_span">'.
3891                       tv_interval($t0, [ gettimeofday() ]).
3892                       ' seconds </span>'.
3893                       ' and '.
3894                       '<span id="generating_cmd">'.
3895                       $number_of_git_cmds.
3896                       '</span> git commands '.
3897                       " to generate.\n";
3898                 print "</div>\n"; # class="page_footer"
3899         }
3900
3901         if (defined $site_footer && -f $site_footer) {
3902                 insert_file($site_footer);
3903         }
3904
3905         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3906         if (defined $action &&
3907             $action eq 'blame_incremental') {
3908                 print qq!<script type="text/javascript">\n!.
3909                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3910                       qq!           "!. href() .qq!");\n!.
3911                       qq!</script>\n!;
3912         } else {
3913                 my ($jstimezone, $tz_cookie, $datetime_class) =
3914                         gitweb_get_feature('javascript-timezone');
3915
3916                 print qq!<script type="text/javascript">\n!.
3917                       qq!window.onload = function () {\n!;
3918                 if (gitweb_check_feature('javascript-actions')) {
3919                         print qq!       fixLinks();\n!;
3920                 }
3921                 if ($jstimezone && $tz_cookie && $datetime_class) {
3922                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
3923                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
3924                 }
3925                 print qq!};\n!.
3926                       qq!</script>\n!;
3927         }
3928
3929         print "</body>\n" .
3930               "</html>";
3931 }
3932
3933 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3934 # Example: die_error(404, 'Hash not found')
3935 # By convention, use the following status codes (as defined in RFC 2616):
3936 # 400: Invalid or missing CGI parameters, or
3937 #      requested object exists but has wrong type.
3938 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3939 #      this server or project.
3940 # 404: Requested object/revision/project doesn't exist.
3941 # 500: The server isn't configured properly, or
3942 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3943 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3944 # 503: The server is currently unavailable (because it is overloaded,
3945 #      or down for maintenance).  Generally, this is a temporary state.
3946 sub die_error {
3947         my $status = shift || 500;
3948         my $error = esc_html(shift) || "Internal Server Error";
3949         my $extra = shift;
3950         my %opts = @_;
3951
3952         my %http_responses = (
3953                 400 => '400 Bad Request',
3954                 403 => '403 Forbidden',
3955                 404 => '404 Not Found',
3956                 500 => '500 Internal Server Error',
3957                 503 => '503 Service Unavailable',
3958         );
3959         git_header_html($http_responses{$status}, undef, %opts);
3960         print <<EOF;
3961 <div class="page_body">
3962 <br /><br />
3963 $status - $error
3964 <br />
3965 EOF
3966         if (defined $extra) {
3967                 print "<hr />\n" .
3968                       "$extra\n";
3969         }
3970         print "</div>\n";
3971
3972         git_footer_html();
3973         goto DONE_GITWEB
3974                 unless ($opts{'-error_handler'});
3975 }
3976
3977 ## ----------------------------------------------------------------------
3978 ## functions printing or outputting HTML: navigation
3979
3980 sub git_print_page_nav {
3981         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3982         $extra = '' if !defined $extra; # pager or formats
3983
3984         my @navs = qw(summary shortlog log commit commitdiff tree);
3985         if ($suppress) {
3986                 @navs = grep { $_ ne $suppress } @navs;
3987         }
3988
3989         my %arg = map { $_ => {action=>$_} } @navs;
3990         if (defined $head) {
3991                 for (qw(commit commitdiff)) {
3992                         $arg{$_}{'hash'} = $head;
3993                 }
3994                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3995                         for (qw(shortlog log)) {
3996                                 $arg{$_}{'hash'} = $head;
3997                         }
3998                 }
3999         }
4000
4001         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4002         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4003
4004         my @actions = gitweb_get_feature('actions');
4005         my %repl = (
4006                 '%' => '%',
4007                 'n' => $project,         # project name
4008                 'f' => $git_dir,         # project path within filesystem
4009                 'h' => $treehead || '',  # current hash ('h' parameter)
4010                 'b' => $treebase || '',  # hash base ('hb' parameter)
4011         );
4012         while (@actions) {
4013                 my ($label, $link, $pos) = splice(@actions,0,3);
4014                 # insert
4015                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4016                 # munch munch
4017                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4018                 $arg{$label}{'_href'} = $link;
4019         }
4020
4021         print "<div class=\"page_nav\">\n" .
4022                 (join " | ",
4023                  map { $_ eq $current ?
4024                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4025                  } @navs);
4026         print "<br/>\n$extra<br/>\n" .
4027               "</div>\n";
4028 }
4029
4030 # returns a submenu for the nagivation of the refs views (tags, heads,
4031 # remotes) with the current view disabled and the remotes view only
4032 # available if the feature is enabled
4033 sub format_ref_views {
4034         my ($current) = @_;
4035         my @ref_views = qw{tags heads};
4036         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4037         return join " | ", map {
4038                 $_ eq $current ? $_ :
4039                 $cgi->a({-href => href(action=>$_)}, $_)
4040         } @ref_views
4041 }
4042
4043 sub format_paging_nav {
4044         my ($action, $page, $has_next_link) = @_;
4045         my $paging_nav;
4046
4047
4048         if ($page > 0) {
4049                 $paging_nav .=
4050                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4051                         " &sdot; " .
4052                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4053                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4054         } else {
4055                 $paging_nav .= "first &sdot; prev";
4056         }
4057
4058         if ($has_next_link) {
4059                 $paging_nav .= " &sdot; " .
4060                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4061                                  -accesskey => "n", -title => "Alt-n"}, "next");
4062         } else {
4063                 $paging_nav .= " &sdot; next";
4064         }
4065
4066         return $paging_nav;
4067 }
4068
4069 ## ......................................................................
4070 ## functions printing or outputting HTML: div
4071
4072 sub git_print_header_div {
4073         my ($action, $title, $hash, $hash_base) = @_;
4074         my %args = ();
4075
4076         $args{'action'} = $action;
4077         $args{'hash'} = $hash if $hash;
4078         $args{'hash_base'} = $hash_base if $hash_base;
4079
4080         print "<div class=\"header\">\n" .
4081               $cgi->a({-href => href(%args), -class => "title"},
4082               $title ? $title : $action) .
4083               "\n</div>\n";
4084 }
4085
4086 sub format_repo_url {
4087         my ($name, $url) = @_;
4088         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4089 }
4090
4091 # Group output by placing it in a DIV element and adding a header.
4092 # Options for start_div() can be provided by passing a hash reference as the
4093 # first parameter to the function.
4094 # Options to git_print_header_div() can be provided by passing an array
4095 # reference. This must follow the options to start_div if they are present.
4096 # The content can be a scalar, which is output as-is, a scalar reference, which
4097 # is output after html escaping, an IO handle passed either as *handle or
4098 # *handle{IO}, or a function reference. In the latter case all following
4099 # parameters will be taken as argument to the content function call.
4100 sub git_print_section {
4101         my ($div_args, $header_args, $content);
4102         my $arg = shift;
4103         if (ref($arg) eq 'HASH') {
4104                 $div_args = $arg;
4105                 $arg = shift;
4106         }
4107         if (ref($arg) eq 'ARRAY') {
4108                 $header_args = $arg;
4109                 $arg = shift;
4110         }
4111         $content = $arg;
4112
4113         print $cgi->start_div($div_args);
4114         git_print_header_div(@$header_args);
4115
4116         if (ref($content) eq 'CODE') {
4117                 $content->(@_);
4118         } elsif (ref($content) eq 'SCALAR') {
4119                 print esc_html($$content);
4120         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4121                 print <$content>;
4122         } elsif (!ref($content) && defined($content)) {
4123                 print $content;
4124         }
4125
4126         print $cgi->end_div;
4127 }
4128
4129 sub format_timestamp_html {
4130         my $date = shift;
4131         my $strtime = $date->{'rfc2822'};
4132
4133         my (undef, undef, $datetime_class) =
4134                 gitweb_get_feature('javascript-timezone');
4135         if ($datetime_class) {
4136                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4137         }
4138
4139         my $localtime_format = '(%02d:%02d %s)';
4140         if ($date->{'hour_local'} < 6) {
4141                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4142         }
4143         $strtime .= ' ' .
4144                     sprintf($localtime_format,
4145                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4146
4147         return $strtime;
4148 }
4149
4150 # Outputs the author name and date in long form
4151 sub git_print_authorship {
4152         my $co = shift;
4153         my %opts = @_;
4154         my $tag = $opts{-tag} || 'div';
4155         my $author = $co->{'author_name'};
4156
4157         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4158         print "<$tag class=\"author_date\">" .
4159               format_search_author($author, "author", esc_html($author)) .
4160               " [".format_timestamp_html(\%ad)."]".
4161               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4162               "</$tag>\n";
4163 }
4164
4165 # Outputs table rows containing the full author or committer information,
4166 # in the format expected for 'commit' view (& similar).
4167 # Parameters are a commit hash reference, followed by the list of people
4168 # to output information for. If the list is empty it defaults to both
4169 # author and committer.
4170 sub git_print_authorship_rows {
4171         my $co = shift;
4172         # too bad we can't use @people = @_ || ('author', 'committer')
4173         my @people = @_;
4174         @people = ('author', 'committer') unless @people;
4175         foreach my $who (@people) {
4176                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4177                 print "<tr><td>$who</td><td>" .
4178                       format_search_author($co->{"${who}_name"}, $who,
4179                                            esc_html($co->{"${who}_name"})) . " " .
4180                       format_search_author($co->{"${who}_email"}, $who,
4181                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4182                       "</td><td rowspan=\"2\">" .
4183                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4184                       "</td></tr>\n" .
4185                       "<tr>" .
4186                       "<td></td><td>" .
4187                       format_timestamp_html(\%wd) .
4188                       "</td>" .
4189                       "</tr>\n";
4190         }
4191 }
4192
4193 sub git_print_page_path {
4194         my $name = shift;
4195         my $type = shift;
4196         my $hb = shift;
4197
4198
4199         print "<div class=\"page_path\">";
4200         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4201                       -title => 'tree root'}, to_utf8("[$project]"));
4202         print " / ";
4203         if (defined $name) {
4204                 my @dirname = split '/', $name;
4205                 my $basename = pop @dirname;
4206                 my $fullname = '';
4207
4208                 foreach my $dir (@dirname) {
4209                         $fullname .= ($fullname ? '/' : '') . $dir;
4210                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4211                                                      hash_base=>$hb),
4212                                       -title => $fullname}, esc_path($dir));
4213                         print " / ";
4214                 }
4215                 if (defined $type && $type eq 'blob') {
4216                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4217                                                      hash_base=>$hb),
4218                                       -title => $name}, esc_path($basename));
4219                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4220 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4221 <script>
4222 function toggleLineNumbers() {
4223         e = document.getElementById("lineNoStyle");
4224         e2 = document.getElementById("lineNoToggle");
4225         if (e2.innerHTML == "[Hide line numbers]") {
4226                 e.innerHTML = ".linenr { display:none; }";
4227                 e2.innerHTML = "[Show line numbers]";
4228         }
4229         else {
4230                 e.innerHTML = "";
4231                 e2.innerHTML = "[Hide line numbers]";
4232         }
4233 }
4234 var style = document.createElement("style");
4235 style.setAttribute("id", "lineNoStyle");
4236 document.getElementsByTagName("head")[0].appendChild(style);
4237 toggleLineNumbers();
4238 </script>
4239 ';
4240                 } elsif (defined $type && $type eq 'tree') {
4241                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4242                                                      hash_base=>$hb),
4243                                       -title => $name}, esc_path($basename));
4244                         print " / ";
4245                 } else {
4246                         print esc_path($basename);
4247                 }
4248         }
4249         print "<br/></div>\n";
4250 }
4251
4252 sub git_print_log {
4253         my $log = shift;
4254         my %opts = @_;
4255
4256         if ($opts{'-remove_title'}) {
4257                 # remove title, i.e. first line of log
4258                 shift @$log;
4259         }
4260         # remove leading empty lines
4261         while (defined $log->[0] && $log->[0] eq "") {
4262                 shift @$log;
4263         }
4264
4265         # print log
4266         my $signoff = 0;
4267         my $empty = 0;
4268         foreach my $line (@$log) {
4269                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4270                         $signoff = 1;
4271                         $empty = 0;
4272                         if (! $opts{'-remove_signoff'}) {
4273                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4274                                 next;
4275                         } else {
4276                                 # remove signoff lines
4277                                 next;
4278                         }
4279                 } else {
4280                         $signoff = 0;
4281                 }
4282
4283                 # print only one empty line
4284                 # do not print empty line after signoff
4285                 if ($line eq "") {
4286                         next if ($empty || $signoff);
4287                         $empty = 1;
4288                 } else {
4289                         $empty = 0;
4290                 }
4291
4292                 print format_log_line_html($line) . "<br/>\n";
4293         }
4294
4295         if ($opts{'-final_empty_line'}) {
4296                 # end with single empty line
4297                 print "<br/>\n" unless $empty;
4298         }
4299 }
4300
4301 # return link target (what link points to)
4302 sub git_get_link_target {
4303         my $hash = shift;
4304         my $link_target;
4305
4306         # read link
4307         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4308                 or return;
4309         {
4310                 local $/ = undef;
4311                 $link_target = <$fd>;
4312         }
4313         close $fd
4314                 or return;
4315
4316         return $link_target;
4317 }
4318
4319 # given link target, and the directory (basedir) the link is in,
4320 # return target of link relative to top directory (top tree);
4321 # return undef if it is not possible (including absolute links).
4322 sub normalize_link_target {
4323         my ($link_target, $basedir) = @_;
4324
4325         # absolute symlinks (beginning with '/') cannot be normalized
4326         return if (substr($link_target, 0, 1) eq '/');
4327
4328         # normalize link target to path from top (root) tree (dir)
4329         my $path;
4330         if ($basedir) {
4331                 $path = $basedir . '/' . $link_target;
4332         } else {
4333                 # we are in top (root) tree (dir)
4334                 $path = $link_target;
4335         }
4336
4337         # remove //, /./, and /../
4338         my @path_parts;
4339         foreach my $part (split('/', $path)) {
4340                 # discard '.' and ''
4341                 next if (!$part || $part eq '.');
4342                 # handle '..'
4343                 if ($part eq '..') {
4344                         if (@path_parts) {
4345                                 pop @path_parts;
4346                         } else {
4347                                 # link leads outside repository (outside top dir)
4348                                 return;
4349                         }
4350                 } else {
4351                         push @path_parts, $part;
4352                 }
4353         }
4354         $path = join('/', @path_parts);
4355
4356         return $path;
4357 }
4358
4359 # print tree entry (row of git_tree), but without encompassing <tr> element
4360 sub git_print_tree_entry {
4361         my ($t, $basedir, $hash_base, $have_blame) = @_;
4362
4363         my %base_key = ();
4364         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4365
4366         # The format of a table row is: mode list link.  Where mode is
4367         # the mode of the entry, list is the name of the entry, an href,
4368         # and link is the action links of the entry.
4369
4370         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4371         if (exists $t->{'size'}) {
4372                 print "<td class=\"size\">$t->{'size'}</td>\n";
4373         }
4374         if ($t->{'type'} eq "blob") {
4375                 print "<td class=\"list\">" .
4376                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4377                                                file_name=>"$basedir$t->{'name'}", %base_key),
4378                                 -class => "list"}, esc_path($t->{'name'}));
4379                 if (S_ISLNK(oct $t->{'mode'})) {
4380                         my $link_target = git_get_link_target($t->{'hash'});
4381                         if ($link_target) {
4382                                 my $norm_target = normalize_link_target($link_target, $basedir);
4383                                 if (defined $norm_target) {
4384                                         print " -> " .
4385                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4386                                                                      file_name=>$norm_target),
4387                                                        -title => $norm_target}, esc_path($link_target));
4388                                 } else {
4389                                         print " -> " . esc_path($link_target);
4390                                 }
4391                         }
4392                 }
4393                 print "</td>\n";
4394                 print "<td class=\"link\">";
4395                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4396                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4397                               "blob");
4398                 if ($have_blame) {
4399                         print " | " .
4400                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4401                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4402                                       "blame");
4403                 }
4404                 if (defined $hash_base) {
4405                         print " | " .
4406                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4407                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4408                                       "history");
4409                 }
4410                 print " | " .
4411                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4412                                                file_name=>"$basedir$t->{'name'}")},
4413                                 "raw");
4414                 print "</td>\n";
4415
4416         } elsif ($t->{'type'} eq "tree") {
4417                 print "<td class=\"list\">";
4418                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4419                                              file_name=>"$basedir$t->{'name'}",
4420                                              %base_key)},
4421                               esc_path($t->{'name'}));
4422                 print "</td>\n";
4423                 print "<td class=\"link\">";
4424                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4425                                              file_name=>"$basedir$t->{'name'}",
4426                                              %base_key)},
4427                               "tree");
4428                 if (defined $hash_base) {
4429                         print " | " .
4430                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4431                                                      file_name=>"$basedir$t->{'name'}")},
4432                                       "history");
4433                 }
4434                 print "</td>\n";
4435         } else {
4436                 # unknown object: we can only present history for it
4437                 # (this includes 'commit' object, i.e. submodule support)
4438                 print "<td class=\"list\">" .
4439                       esc_path($t->{'name'}) .
4440                       "</td>\n";
4441                 print "<td class=\"link\">";
4442                 if (defined $hash_base) {
4443                         print $cgi->a({-href => href(action=>"history",
4444                                                      hash_base=>$hash_base,
4445                                                      file_name=>"$basedir$t->{'name'}")},
4446                                       "history");
4447                 }
4448                 print "</td>\n";
4449         }
4450 }
4451
4452 ## ......................................................................
4453 ## functions printing large fragments of HTML
4454
4455 # get pre-image filenames for merge (combined) diff
4456 sub fill_from_file_info {
4457         my ($diff, @parents) = @_;
4458
4459         $diff->{'from_file'} = [ ];
4460         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4461         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4462                 if ($diff->{'status'}[$i] eq 'R' ||
4463                     $diff->{'status'}[$i] eq 'C') {
4464                         $diff->{'from_file'}[$i] =
4465                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4466                 }
4467         }
4468
4469         return $diff;
4470 }
4471
4472 # is current raw difftree line of file deletion
4473 sub is_deleted {
4474         my $diffinfo = shift;
4475
4476         return $diffinfo->{'to_id'} eq ('0' x 40);
4477 }
4478
4479 # does patch correspond to [previous] difftree raw line
4480 # $diffinfo  - hashref of parsed raw diff format
4481 # $patchinfo - hashref of parsed patch diff format
4482 #              (the same keys as in $diffinfo)
4483 sub is_patch_split {
4484         my ($diffinfo, $patchinfo) = @_;
4485
4486         return defined $diffinfo && defined $patchinfo
4487                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4488 }
4489
4490
4491 sub git_difftree_body {
4492         my ($difftree, $hash, @parents) = @_;
4493         my ($parent) = $parents[0];
4494         my $have_blame = gitweb_check_feature('blame');
4495         print "<div class=\"list_head\">\n";
4496         if ($#{$difftree} > 10) {
4497                 print(($#{$difftree} + 1) . " files changed:\n");
4498         }
4499         print "</div>\n";
4500
4501         print "<table class=\"" .
4502               (@parents > 1 ? "combined " : "") .
4503               "diff_tree\">\n";
4504
4505         # header only for combined diff in 'commitdiff' view
4506         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4507         if ($has_header) {
4508                 # table header
4509                 print "<thead><tr>\n" .
4510                        "<th></th><th></th>\n"; # filename, patchN link
4511                 for (my $i = 0; $i < @parents; $i++) {
4512                         my $par = $parents[$i];
4513                         print "<th>" .
4514                               $cgi->a({-href => href(action=>"commitdiff",
4515                                                      hash=>$hash, hash_parent=>$par),
4516                                        -title => 'commitdiff to parent number ' .
4517                                                   ($i+1) . ': ' . substr($par,0,7)},
4518                                       $i+1) .
4519                               "&nbsp;</th>\n";
4520                 }
4521                 print "</tr></thead>\n<tbody>\n";
4522         }
4523
4524         my $alternate = 1;
4525         my $patchno = 0;
4526         foreach my $line (@{$difftree}) {
4527                 my $diff = parsed_difftree_line($line);
4528
4529                 if ($alternate) {
4530                         print "<tr class=\"dark\">\n";
4531                 } else {
4532                         print "<tr class=\"light\">\n";
4533                 }
4534                 $alternate ^= 1;
4535
4536                 if (exists $diff->{'nparents'}) { # combined diff
4537
4538                         fill_from_file_info($diff, @parents)
4539                                 unless exists $diff->{'from_file'};
4540
4541                         if (!is_deleted($diff)) {
4542                                 # file exists in the result (child) commit
4543                                 print "<td>" .
4544                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4545                                                              file_name=>$diff->{'to_file'},
4546                                                              hash_base=>$hash),
4547                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4548                                       "</td>\n";
4549                         } else {
4550                                 print "<td>" .
4551                                       esc_path($diff->{'to_file'}) .
4552                                       "</td>\n";
4553                         }
4554
4555                         if ($action eq 'commitdiff') {
4556                                 # link to patch
4557                                 $patchno++;
4558                                 print "<td class=\"link\">" .
4559                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4560                                               "patch") .
4561                                       " | " .
4562                                       "</td>\n";
4563                         }
4564
4565                         my $has_history = 0;
4566                         my $not_deleted = 0;
4567                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4568                                 my $hash_parent = $parents[$i];
4569                                 my $from_hash = $diff->{'from_id'}[$i];
4570                                 my $from_path = $diff->{'from_file'}[$i];
4571                                 my $status = $diff->{'status'}[$i];
4572
4573                                 $has_history ||= ($status ne 'A');
4574                                 $not_deleted ||= ($status ne 'D');
4575
4576                                 if ($status eq 'A') {
4577                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4578                                 } elsif ($status eq 'D') {
4579                                         print "<td class=\"link\">" .
4580                                               $cgi->a({-href => href(action=>"blob",
4581                                                                      hash_base=>$hash,
4582                                                                      hash=>$from_hash,
4583                                                                      file_name=>$from_path)},
4584                                                       "blob" . ($i+1)) .
4585                                               " | </td>\n";
4586                                 } else {
4587                                         if ($diff->{'to_id'} eq $from_hash) {
4588                                                 print "<td class=\"link nochange\">";
4589                                         } else {
4590                                                 print "<td class=\"link\">";
4591                                         }
4592                                         print $cgi->a({-href => href(action=>"blobdiff",
4593                                                                      hash=>$diff->{'to_id'},
4594                                                                      hash_parent=>$from_hash,
4595                                                                      hash_base=>$hash,
4596                                                                      hash_parent_base=>$hash_parent,
4597                                                                      file_name=>$diff->{'to_file'},
4598                                                                      file_parent=>$from_path)},
4599                                                       "diff" . ($i+1)) .
4600                                               " | </td>\n";
4601                                 }
4602                         }
4603
4604                         print "<td class=\"link\">";
4605                         if ($not_deleted) {
4606                                 print $cgi->a({-href => href(action=>"blob",
4607                                                              hash=>$diff->{'to_id'},
4608                                                              file_name=>$diff->{'to_file'},
4609                                                              hash_base=>$hash)},
4610                                               "blob");
4611                                 print " | " if ($has_history);
4612                         }
4613                         if ($has_history) {
4614                                 print $cgi->a({-href => href(action=>"history",
4615                                                              file_name=>$diff->{'to_file'},
4616                                                              hash_base=>$hash)},
4617                                               "history");
4618                         }
4619                         print "</td>\n";
4620
4621                         print "</tr>\n";
4622                         next; # instead of 'else' clause, to avoid extra indent
4623                 }
4624                 # else ordinary diff
4625
4626                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4627                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4628                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4629                         $to_mode_oct = oct $diff->{'to_mode'};
4630                         if (S_ISREG($to_mode_oct)) { # only for regular file
4631                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4632                         }
4633                         $to_file_type = file_type($diff->{'to_mode'});
4634                 }
4635                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4636                         $from_mode_oct = oct $diff->{'from_mode'};
4637                         if (S_ISREG($from_mode_oct)) { # only for regular file
4638                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4639                         }
4640                         $from_file_type = file_type($diff->{'from_mode'});
4641                 }
4642
4643                 if ($diff->{'status'} eq "A") { # created
4644                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4645                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4646                         $mode_chng   .= "]</span>";
4647                         print "<td>";
4648                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4649                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4650                                       -class => "list"}, esc_path($diff->{'file'}));
4651                         print "</td>\n";
4652                         print "<td>$mode_chng</td>\n";
4653                         print "<td class=\"link\">";
4654                         if ($action eq 'commitdiff') {
4655                                 # link to patch
4656                                 $patchno++;
4657                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4658                                               "patch") .
4659                                       " | ";
4660                         }
4661                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4662                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4663                                       "blob");
4664                         print "</td>\n";
4665
4666                 } elsif ($diff->{'status'} eq "D") { # deleted
4667                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4668                         print "<td>";
4669                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4670                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4671                                        -class => "list"}, esc_path($diff->{'file'}));
4672                         print "</td>\n";
4673                         print "<td>$mode_chng</td>\n";
4674                         print "<td class=\"link\">";
4675                         if ($action eq 'commitdiff') {
4676                                 # link to patch
4677                                 $patchno++;
4678                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4679                                               "patch") .
4680                                       " | ";
4681                         }
4682                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4683                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4684                                       "blob") . " | ";
4685                         if ($have_blame) {
4686                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4687                                                              file_name=>$diff->{'file'})},
4688                                               "blame") . " | ";
4689                         }
4690                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4691                                                      file_name=>$diff->{'file'})},
4692                                       "history");
4693                         print "</td>\n";
4694
4695                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4696                         my $mode_chnge = "";
4697                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4698                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4699                                 if ($from_file_type ne $to_file_type) {
4700                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4701                                 }
4702                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4703                                         if ($from_mode_str && $to_mode_str) {
4704                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4705                                         } elsif ($to_mode_str) {
4706                                                 $mode_chnge .= " mode: $to_mode_str";
4707                                         }
4708                                 }
4709                                 $mode_chnge .= "]</span>\n";
4710                         }
4711                         print "<td>";
4712                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4713                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4714                                       -class => "list"}, esc_path($diff->{'file'}));
4715                         print "</td>\n";
4716                         print "<td>$mode_chnge</td>\n";
4717                         print "<td class=\"link\">";
4718                         if ($action eq 'commitdiff') {
4719                                 # link to patch
4720                                 $patchno++;
4721                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4722                                               "patch") .
4723                                       " | ";
4724                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4725                                 # "commit" view and modified file (not onlu mode changed)
4726                                 print $cgi->a({-href => href(action=>"blobdiff",
4727                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4728                                                              hash_base=>$hash, hash_parent_base=>$parent,
4729                                                              file_name=>$diff->{'file'})},
4730                                               "diff") .
4731                                       " | ";
4732                         }
4733                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4734                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4735                                        "blob") . " | ";
4736                         if ($have_blame) {
4737                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4738                                                              file_name=>$diff->{'file'})},
4739                                               "blame") . " | ";
4740                         }
4741                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4742                                                      file_name=>$diff->{'file'})},
4743                                       "history");
4744                         print "</td>\n";
4745
4746                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4747                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4748                         my $nstatus = $status_name{$diff->{'status'}};
4749                         my $mode_chng = "";
4750                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4751                                 # mode also for directories, so we cannot use $to_mode_str
4752                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4753                         }
4754                         print "<td>" .
4755                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4756                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4757                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4758                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4759                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4760                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4761                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4762                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4763                               "<td class=\"link\">";
4764                         if ($action eq 'commitdiff') {
4765                                 # link to patch
4766                                 $patchno++;
4767                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4768                                               "patch") .
4769                                       " | ";
4770                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4771                                 # "commit" view and modified file (not only pure rename or copy)
4772                                 print $cgi->a({-href => href(action=>"blobdiff",
4773                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4774                                                              hash_base=>$hash, hash_parent_base=>$parent,
4775                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4776                                               "diff") .
4777                                       " | ";
4778                         }
4779                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4780                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4781                                       "blob") . " | ";
4782                         if ($have_blame) {
4783                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4784                                                              file_name=>$diff->{'to_file'})},
4785                                               "blame") . " | ";
4786                         }
4787                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4788                                                     file_name=>$diff->{'to_file'})},
4789                                       "history");
4790                         print "</td>\n";
4791
4792                 } # we should not encounter Unmerged (U) or Unknown (X) status
4793                 print "</tr>\n";
4794         }
4795         print "</tbody>" if $has_header;
4796         print "</table>\n";
4797 }
4798
4799 sub git_patchset_body {
4800         my ($fd, $difftree, $hash, @hash_parents) = @_;
4801         my ($hash_parent) = $hash_parents[0];
4802
4803         my $is_combined = (@hash_parents > 1);
4804         my $patch_idx = 0;
4805         my $patch_number = 0;
4806         my $patch_line;
4807         my $diffinfo;
4808         my $to_name;
4809         my (%from, %to);
4810
4811         print "<div class=\"patchset\">\n";
4812
4813         # skip to first patch
4814         while ($patch_line = <$fd>) {
4815                 chomp $patch_line;
4816
4817                 last if ($patch_line =~ m/^diff /);
4818         }
4819
4820  PATCH:
4821         while ($patch_line) {
4822
4823                 # parse "git diff" header line
4824                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4825                         # $1 is from_name, which we do not use
4826                         $to_name = unquote($2);
4827                         $to_name =~ s!^b/!!;
4828                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4829                         # $1 is 'cc' or 'combined', which we do not use
4830                         $to_name = unquote($2);
4831                 } else {
4832                         $to_name = undef;
4833                 }
4834
4835                 # check if current patch belong to current raw line
4836                 # and parse raw git-diff line if needed
4837                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4838                         # this is continuation of a split patch
4839                         print "<div class=\"patch cont\">\n";
4840                 } else {
4841                         # advance raw git-diff output if needed
4842                         $patch_idx++ if defined $diffinfo;
4843
4844                         # read and prepare patch information
4845                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4846
4847                         # compact combined diff output can have some patches skipped
4848                         # find which patch (using pathname of result) we are at now;
4849                         if ($is_combined) {
4850                                 while ($to_name ne $diffinfo->{'to_file'}) {
4851                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4852                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4853                                               "</div>\n";  # class="patch"
4854
4855                                         $patch_idx++;
4856                                         $patch_number++;
4857
4858                                         last if $patch_idx > $#$difftree;
4859                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4860                                 }
4861                         }
4862
4863                         # modifies %from, %to hashes
4864                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4865
4866                         # this is first patch for raw difftree line with $patch_idx index
4867                         # we index @$difftree array from 0, but number patches from 1
4868                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4869                 }
4870
4871                 # git diff header
4872                 #assert($patch_line =~ m/^diff /) if DEBUG;
4873                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4874                 $patch_number++;
4875                 # print "git diff" header
4876                 print format_git_diff_header_line($patch_line, $diffinfo,
4877                                                   \%from, \%to);
4878
4879                 # print extended diff header
4880                 print "<div class=\"diff extended_header\">\n";
4881         EXTENDED_HEADER:
4882                 while ($patch_line = <$fd>) {
4883                         chomp $patch_line;
4884
4885                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4886
4887                         print format_extended_diff_header_line($patch_line, $diffinfo,
4888                                                                \%from, \%to);
4889                 }
4890                 print "</div>\n"; # class="diff extended_header"
4891
4892                 # from-file/to-file diff header
4893                 if (! $patch_line) {
4894                         print "</div>\n"; # class="patch"
4895                         last PATCH;
4896                 }
4897                 next PATCH if ($patch_line =~ m/^diff /);
4898                 #assert($patch_line =~ m/^---/) if DEBUG;
4899
4900                 my $last_patch_line = $patch_line;
4901                 $patch_line = <$fd>;
4902                 chomp $patch_line;
4903                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4904
4905                 print format_diff_from_to_header($last_patch_line, $patch_line,
4906                                                  $diffinfo, \%from, \%to,
4907                                                  @hash_parents);
4908
4909                 # the patch itself
4910         LINE:
4911                 while ($patch_line = <$fd>) {
4912                         chomp $patch_line;
4913
4914                         next PATCH if ($patch_line =~ m/^diff /);
4915
4916                         print format_diff_line($patch_line, \%from, \%to);
4917                 }
4918
4919         } continue {
4920                 print "</div>\n"; # class="patch"
4921         }
4922
4923         # for compact combined (--cc) format, with chunk and patch simplification
4924         # the patchset might be empty, but there might be unprocessed raw lines
4925         for (++$patch_idx if $patch_number > 0;
4926              $patch_idx < @$difftree;
4927              ++$patch_idx) {
4928                 # read and prepare patch information
4929                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4930
4931                 # generate anchor for "patch" links in difftree / whatchanged part
4932                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4933                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4934                       "</div>\n";  # class="patch"
4935
4936                 $patch_number++;
4937         }
4938
4939         if ($patch_number == 0) {
4940                 if (@hash_parents > 1) {
4941                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4942                 } else {
4943                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4944                 }
4945         }
4946
4947         print "</div>\n"; # class="patchset"
4948 }
4949
4950 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4951
4952 # fills project list info (age, description, owner, category, forks)
4953 # for each project in the list, removing invalid projects from
4954 # returned list
4955 # NOTE: modifies $projlist, but does not remove entries from it
4956 sub fill_project_list_info {
4957         my $projlist = shift;
4958         my @projects;
4959
4960         my $show_ctags = gitweb_check_feature('ctags');
4961  PROJECT:
4962         foreach my $pr (@$projlist) {
4963                 my (@activity) = git_get_last_activity($pr->{'path'});
4964                 unless (@activity) {
4965                         next PROJECT;
4966                 }
4967                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4968                 if (!defined $pr->{'descr'}) {
4969                         my $descr = git_get_project_description($pr->{'path'}) || "";
4970                         $descr = to_utf8($descr);
4971                         $pr->{'descr_long'} = $descr;
4972                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4973                 }
4974                 if (!defined $pr->{'owner'}) {
4975                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4976                 }
4977                 if ($show_ctags) {
4978                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4979                 }
4980                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
4981                         my $cat = git_get_project_category($pr->{'path'}) ||
4982                                                            $project_list_default_category;
4983                         $pr->{'category'} = to_utf8($cat);
4984                 }
4985
4986                 push @projects, $pr;
4987         }
4988
4989         return @projects;
4990 }
4991
4992 sub sort_projects_list {
4993         my ($projlist, $order) = @_;
4994         my @projects;
4995
4996         my %order_info = (
4997                 project => { key => 'path', type => 'str' },
4998                 descr => { key => 'descr_long', type => 'str' },
4999                 owner => { key => 'owner', type => 'str' },
5000                 age => { key => 'age', type => 'num' }
5001         );
5002         my $oi = $order_info{$order};
5003         return @$projlist unless defined $oi;
5004         if ($oi->{'type'} eq 'str') {
5005                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5006         } else {
5007                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5008         }
5009
5010         return @projects;
5011 }
5012
5013 # returns a hash of categories, containing the list of project
5014 # belonging to each category
5015 sub build_projlist_by_category {
5016         my ($projlist, $from, $to) = @_;
5017         my %categories;
5018
5019         $from = 0 unless defined $from;
5020         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5021
5022         for (my $i = $from; $i <= $to; $i++) {
5023                 my $pr = $projlist->[$i];
5024                 push @{$categories{ $pr->{'category'} }}, $pr;
5025         }
5026
5027         return wantarray ? %categories : \%categories;
5028 }
5029
5030 # print 'sort by' <th> element, generating 'sort by $name' replay link
5031 # if that order is not selected
5032 sub print_sort_th {
5033         print format_sort_th(@_);
5034 }
5035
5036 sub format_sort_th {
5037         my ($name, $order, $header) = @_;
5038         my $sort_th = "";
5039         $header ||= ucfirst($name);
5040
5041         if ($order eq $name) {
5042                 $sort_th .= "<th>$header</th>\n";
5043         } else {
5044                 $sort_th .= "<th>" .
5045                             $cgi->a({-href => href(-replay=>1, order=>$name),
5046                                      -class => "header"}, $header) .
5047                             "</th>\n";
5048         }
5049
5050         return $sort_th;
5051 }
5052
5053 sub git_project_list_rows {
5054         my ($projlist, $from, $to, $check_forks) = @_;
5055
5056         $from = 0 unless defined $from;
5057         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5058
5059         my $alternate = 1;
5060         for (my $i = $from; $i <= $to; $i++) {
5061                 my $pr = $projlist->[$i];
5062
5063                 if ($alternate) {
5064                         print "<tr class=\"dark\">\n";
5065                 } else {
5066                         print "<tr class=\"light\">\n";
5067                 }
5068                 $alternate ^= 1;
5069
5070                 if ($check_forks) {
5071                         print "<td>";
5072                         if ($pr->{'forks'}) {
5073                                 my $nforks = scalar @{$pr->{'forks'}};
5074                                 if ($nforks > 0) {
5075                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5076                                                        -title => "$nforks forks"}, "+");
5077                                 } else {
5078                                         print $cgi->span({-title => "$nforks forks"}, "+");
5079                                 }
5080                         }
5081                         print "</td>\n";
5082                 }
5083                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5084                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5085                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5086                                         -class => "list", -title => $pr->{'descr_long'}},
5087                                         esc_html($pr->{'descr'})) . "</td>\n" .
5088                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5089                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5090                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5091                       "<td class=\"link\">" .
5092                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5093                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5094                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5095                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5096                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5097                       "</td>\n" .
5098                       "</tr>\n";
5099         }
5100 }
5101
5102 sub git_project_list_body {
5103         # actually uses global variable $project
5104         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5105         my @projects = @$projlist;
5106
5107         my $check_forks = gitweb_check_feature('forks');
5108         my $show_ctags  = gitweb_check_feature('ctags');
5109         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5110         $check_forks = undef
5111                 if ($tagfilter || $searchtext);
5112
5113         # filtering out forks before filling info allows to do less work
5114         @projects = filter_forks_from_projects_list(\@projects)
5115                 if ($check_forks);
5116         @projects = fill_project_list_info(\@projects);
5117         # searching projects require filling to be run before it
5118         @projects = search_projects_list(\@projects,
5119                                          'searchtext' => $searchtext,
5120                                          'tagfilter'  => $tagfilter)
5121                 if ($tagfilter || $searchtext);
5122
5123         $order ||= $default_projects_order;
5124         $from = 0 unless defined $from;
5125         $to = $#projects if (!defined $to || $#projects < $to);
5126
5127         # short circuit
5128         if ($from > $to) {
5129                 print "<center>\n".
5130                       "<b>No such projects found</b><br />\n".
5131                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5132                       "</center>\n<br />\n";
5133                 return;
5134         }
5135
5136         @projects = sort_projects_list(\@projects, $order);
5137
5138         if ($show_ctags) {
5139                 my $ctags = git_gather_all_ctags(\@projects);
5140                 my $cloud = git_populate_project_tagcloud($ctags);
5141                 print git_show_project_tagcloud($cloud, 64);
5142         }
5143
5144         print "<table class=\"project_list\">\n";
5145         unless ($no_header) {
5146                 print "<tr>\n";
5147                 if ($check_forks) {
5148                         print "<th></th>\n";
5149                 }
5150                 print_sort_th('project', $order, 'Project');
5151                 print_sort_th('descr', $order, 'Description');
5152                 print_sort_th('owner', $order, 'Owner');
5153                 print_sort_th('age', $order, 'Last Change');
5154                 print "<th></th>\n" . # for links
5155                       "</tr>\n";
5156         }
5157
5158         if ($projects_list_group_categories) {
5159                 # only display categories with projects in the $from-$to window
5160                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5161                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5162                 foreach my $cat (sort keys %categories) {
5163                         unless ($cat eq "") {
5164                                 print "<tr>\n";
5165                                 if ($check_forks) {
5166                                         print "<td></td>\n";
5167                                 }
5168                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5169                                 print "</tr>\n";
5170                         }
5171
5172                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5173                 }
5174         } else {
5175                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5176         }
5177
5178         if (defined $extra) {
5179                 print "<tr>\n";
5180                 if ($check_forks) {
5181                         print "<td></td>\n";
5182                 }
5183                 print "<td colspan=\"5\">$extra</td>\n" .
5184                       "</tr>\n";
5185         }
5186         print "</table>\n";
5187 }
5188
5189 sub git_log_body {
5190         # uses global variable $project
5191         my ($commitlist, $from, $to, $refs, $extra) = @_;
5192
5193         $from = 0 unless defined $from;
5194         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5195
5196         for (my $i = 0; $i <= $to; $i++) {
5197                 my %co = %{$commitlist->[$i]};
5198                 next if !%co;
5199                 my $commit = $co{'id'};
5200                 my $ref = format_ref_marker($refs, $commit);
5201                 git_print_header_div('commit',
5202                                "<span class=\"age\">$co{'age_string'}</span>" .
5203                                esc_html($co{'title'}) . $ref,
5204                                $commit);
5205                 print "<div class=\"title_text\">\n" .
5206                       "<div class=\"log_link\">\n" .
5207                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5208                       " | " .
5209                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5210                       " | " .
5211                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5212                       "<br/>\n" .
5213                       "</div>\n";
5214                       git_print_authorship(\%co, -tag => 'span');
5215                       print "<br/>\n</div>\n";
5216
5217                 print "<div class=\"log_body\">\n";
5218                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5219                 print "</div>\n";
5220         }
5221         if ($extra) {
5222                 print "<div class=\"page_nav\">\n";
5223                 print "$extra\n";
5224                 print "</div>\n";
5225         }
5226 }
5227
5228 sub git_shortlog_body {
5229         # uses global variable $project
5230         my ($commitlist, $from, $to, $refs, $extra) = @_;
5231
5232         $from = 0 unless defined $from;
5233         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5234
5235         print "<table class=\"shortlog\">\n";
5236         my $alternate = 1;
5237         for (my $i = $from; $i <= $to; $i++) {
5238                 my %co = %{$commitlist->[$i]};
5239                 my $commit = $co{'id'};
5240                 my $ref = format_ref_marker($refs, $commit);
5241                 if ($alternate) {
5242                         print "<tr class=\"dark\">\n";
5243                 } else {
5244                         print "<tr class=\"light\">\n";
5245                 }
5246                 $alternate ^= 1;
5247                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5248                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5249                       format_author_html('td', \%co, 10) . "<td>";
5250                 print format_subject_html($co{'title'}, $co{'title_short'},
5251                                           href(action=>"commit", hash=>$commit), $ref);
5252                 print "</td>\n" .
5253                       "<td class=\"link\">" .
5254                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5255                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5256                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5257                 my $snapshot_links = format_snapshot_links($commit);
5258                 if (defined $snapshot_links) {
5259                         print " | " . $snapshot_links;
5260                 }
5261                 print "</td>\n" .
5262                       "</tr>\n";
5263         }
5264         if (defined $extra) {
5265                 print "<tr>\n" .
5266                       "<td colspan=\"4\">$extra</td>\n" .
5267                       "</tr>\n";
5268         }
5269         print "</table>\n";
5270 }
5271
5272 sub git_history_body {
5273         # Warning: assumes constant type (blob or tree) during history
5274         my ($commitlist, $from, $to, $refs, $extra,
5275             $file_name, $file_hash, $ftype) = @_;
5276
5277         $from = 0 unless defined $from;
5278         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5279
5280         print "<table class=\"history\">\n";
5281         my $alternate = 1;
5282         for (my $i = $from; $i <= $to; $i++) {
5283                 my %co = %{$commitlist->[$i]};
5284                 if (!%co) {
5285                         next;
5286                 }
5287                 my $commit = $co{'id'};
5288
5289                 my $ref = format_ref_marker($refs, $commit);
5290
5291                 if ($alternate) {
5292                         print "<tr class=\"dark\">\n";
5293                 } else {
5294                         print "<tr class=\"light\">\n";
5295                 }
5296                 $alternate ^= 1;
5297                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5298         # shortlog:   format_author_html('td', \%co, 10)
5299                       format_author_html('td', \%co, 15, 3) . "<td>";
5300                 # originally git_history used chop_str($co{'title'}, 50)
5301                 print format_subject_html($co{'title'}, $co{'title_short'},
5302                                           href(action=>"commit", hash=>$commit), $ref);
5303                 print "</td>\n" .
5304                       "<td class=\"link\">" .
5305                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5306                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5307
5308                 if ($ftype eq 'blob') {
5309                         my $blob_current = $file_hash;
5310                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5311                         if (defined $blob_current && defined $blob_parent &&
5312                                         $blob_current ne $blob_parent) {
5313                                 print " | " .
5314                                         $cgi->a({-href => href(action=>"blobdiff",
5315                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5316                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5317                                                                file_name=>$file_name)},
5318                                                 "diff to current");
5319                         }
5320                 }
5321                 print "</td>\n" .
5322                       "</tr>\n";
5323         }
5324         if (defined $extra) {
5325                 print "<tr>\n" .
5326                       "<td colspan=\"4\">$extra</td>\n" .
5327                       "</tr>\n";
5328         }
5329         print "</table>\n";
5330 }
5331
5332 sub git_tags_body {
5333         # uses global variable $project
5334         my ($taglist, $from, $to, $extra) = @_;
5335         $from = 0 unless defined $from;
5336         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5337
5338         print "<table class=\"tags\">\n";
5339         my $alternate = 1;
5340         for (my $i = $from; $i <= $to; $i++) {
5341                 my $entry = $taglist->[$i];
5342                 my %tag = %$entry;
5343                 my $comment = $tag{'subject'};
5344                 my $comment_short;
5345                 if (defined $comment) {
5346                         $comment_short = chop_str($comment, 30, 5);
5347                 }
5348                 if ($alternate) {
5349                         print "<tr class=\"dark\">\n";
5350                 } else {
5351                         print "<tr class=\"light\">\n";
5352                 }
5353                 $alternate ^= 1;
5354                 if (defined $tag{'age'}) {
5355                         print "<td><i>$tag{'age'}</i></td>\n";
5356                 } else {
5357                         print "<td></td>\n";
5358                 }
5359                 print "<td>" .
5360                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5361                                -class => "list name"}, esc_html($tag{'name'})) .
5362                       "</td>\n" .
5363                       "<td>";
5364                 if (defined $comment) {
5365                         print format_subject_html($comment, $comment_short,
5366                                                   href(action=>"tag", hash=>$tag{'id'}));
5367                 }
5368                 print "</td>\n" .
5369                       "<td class=\"selflink\">";
5370                 if ($tag{'type'} eq "tag") {
5371                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5372                 } else {
5373                         print "&nbsp;";
5374                 }
5375                 print "</td>\n" .
5376                       "<td class=\"link\">" . " | " .
5377                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5378                 if ($tag{'reftype'} eq "commit") {
5379                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5380                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5381                 } elsif ($tag{'reftype'} eq "blob") {
5382                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5383                 }
5384                 print "</td>\n" .
5385                       "</tr>";
5386         }
5387         if (defined $extra) {
5388                 print "<tr>\n" .
5389                       "<td colspan=\"5\">$extra</td>\n" .
5390                       "</tr>\n";
5391         }
5392         print "</table>\n";
5393 }
5394
5395 sub git_heads_body {
5396         # uses global variable $project
5397         my ($headlist, $head, $from, $to, $extra) = @_;
5398         $from = 0 unless defined $from;
5399         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5400
5401         print "<table class=\"heads\">\n";
5402         my $alternate = 1;
5403         for (my $i = $from; $i <= $to; $i++) {
5404                 my $entry = $headlist->[$i];
5405                 my %ref = %$entry;
5406                 my $curr = $ref{'id'} eq $head;
5407                 if ($alternate) {
5408                         print "<tr class=\"dark\">\n";
5409                 } else {
5410                         print "<tr class=\"light\">\n";
5411                 }
5412                 $alternate ^= 1;
5413                 print "<td><i>$ref{'age'}</i></td>\n" .
5414                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5415                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5416                                -class => "list name"},esc_html($ref{'name'})) .
5417                       "</td>\n" .
5418                       "<td class=\"link\">" .
5419                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5420                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5421                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5422                       "</td>\n" .
5423                       "</tr>";
5424         }
5425         if (defined $extra) {
5426                 print "<tr>\n" .
5427                       "<td colspan=\"3\">$extra</td>\n" .
5428                       "</tr>\n";
5429         }
5430         print "</table>\n";
5431 }
5432
5433 # Display a single remote block
5434 sub git_remote_block {
5435         my ($remote, $rdata, $limit, $head) = @_;
5436
5437         my $heads = $rdata->{'heads'};
5438         my $fetch = $rdata->{'fetch'};
5439         my $push = $rdata->{'push'};
5440
5441         my $urls_table = "<table class=\"projects_list\">\n" ;
5442
5443         if (defined $fetch) {
5444                 if ($fetch eq $push) {
5445                         $urls_table .= format_repo_url("URL", $fetch);
5446                 } else {
5447                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5448                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5449                 }
5450         } elsif (defined $push) {
5451                 $urls_table .= format_repo_url("Push URL", $push);
5452         } else {
5453                 $urls_table .= format_repo_url("", "No remote URL");
5454         }
5455
5456         $urls_table .= "</table>\n";
5457
5458         my $dots;
5459         if (defined $limit && $limit < @$heads) {
5460                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5461         }
5462
5463         print $urls_table;
5464         git_heads_body($heads, $head, 0, $limit, $dots);
5465 }
5466
5467 # Display a list of remote names with the respective fetch and push URLs
5468 sub git_remotes_list {
5469         my ($remotedata, $limit) = @_;
5470         print "<table class=\"heads\">\n";
5471         my $alternate = 1;
5472         my @remotes = sort keys %$remotedata;
5473
5474         my $limited = $limit && $limit < @remotes;
5475
5476         $#remotes = $limit - 1 if $limited;
5477
5478         while (my $remote = shift @remotes) {
5479                 my $rdata = $remotedata->{$remote};
5480                 my $fetch = $rdata->{'fetch'};
5481                 my $push = $rdata->{'push'};
5482                 if ($alternate) {
5483                         print "<tr class=\"dark\">\n";
5484                 } else {
5485                         print "<tr class=\"light\">\n";
5486                 }
5487                 $alternate ^= 1;
5488                 print "<td>" .
5489                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5490                                -class=> "list name"},esc_html($remote)) .
5491                       "</td>";
5492                 print "<td class=\"link\">" .
5493                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5494                       " | " .
5495                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5496                       "</td>";
5497
5498                 print "</tr>\n";
5499         }
5500
5501         if ($limited) {
5502                 print "<tr>\n" .
5503                       "<td colspan=\"3\">" .
5504                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5505                       "</td>\n" . "</tr>\n";
5506         }
5507
5508         print "</table>";
5509 }
5510
5511 # Display remote heads grouped by remote, unless there are too many
5512 # remotes, in which case we only display the remote names
5513 sub git_remotes_body {
5514         my ($remotedata, $limit, $head) = @_;
5515         if ($limit and $limit < keys %$remotedata) {
5516                 git_remotes_list($remotedata, $limit);
5517         } else {
5518                 fill_remote_heads($remotedata);
5519                 while (my ($remote, $rdata) = each %$remotedata) {
5520                         git_print_section({-class=>"remote", -id=>$remote},
5521                                 ["remotes", $remote, $remote], sub {
5522                                         git_remote_block($remote, $rdata, $limit, $head);
5523                                 });
5524                 }
5525         }
5526 }
5527
5528 sub git_search_grep_body {
5529         my ($commitlist, $from, $to, $extra) = @_;
5530         $from = 0 unless defined $from;
5531         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5532
5533         print "<table class=\"commit_search\">\n";
5534         my $alternate = 1;
5535         for (my $i = $from; $i <= $to; $i++) {
5536                 my %co = %{$commitlist->[$i]};
5537                 if (!%co) {
5538                         next;
5539                 }
5540                 my $commit = $co{'id'};
5541                 if ($alternate) {
5542                         print "<tr class=\"dark\">\n";
5543                 } else {
5544                         print "<tr class=\"light\">\n";
5545                 }
5546                 $alternate ^= 1;
5547                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5548                       format_author_html('td', \%co, 15, 5) .
5549                       "<td>" .
5550                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5551                                -class => "list subject"},
5552                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5553                 my $comment = $co{'comment'};
5554                 foreach my $line (@$comment) {
5555                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5556                                 my ($lead, $match, $trail) = ($1, $2, $3);
5557                                 $match = chop_str($match, 70, 5, 'center');
5558                                 my $contextlen = int((80 - length($match))/2);
5559                                 $contextlen = 30 if ($contextlen > 30);
5560                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5561                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5562
5563                                 $lead  = esc_html($lead);
5564                                 $match = esc_html($match);
5565                                 $trail = esc_html($trail);
5566
5567                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5568                         }
5569                 }
5570                 print "</td>\n" .
5571                       "<td class=\"link\">" .
5572                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5573                       " | " .
5574                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5575                       " | " .
5576                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5577                 print "</td>\n" .
5578                       "</tr>\n";
5579         }
5580         if (defined $extra) {
5581                 print "<tr>\n" .
5582                       "<td colspan=\"3\">$extra</td>\n" .
5583                       "</tr>\n";
5584         }
5585         print "</table>\n";
5586 }
5587
5588 ## ======================================================================
5589 ## ======================================================================
5590 ## actions
5591
5592 sub git_project_list {
5593         my $order = $input_params{'order'};
5594         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5595                 die_error(400, "Unknown order parameter");
5596         }
5597
5598         my @list = git_get_projects_list();
5599         if (!@list) {
5600                 die_error(404, "No projects found");
5601         }
5602
5603         git_header_html();
5604         if (defined $home_text && -f $home_text) {
5605                 print "<div class=\"index_include\">\n";
5606                 insert_file($home_text);
5607                 print "</div>\n";
5608         }
5609         print $cgi->startform(-method => "get") .
5610               "<p class=\"projsearch\">Search:\n" .
5611               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5612               "</p>" .
5613               $cgi->end_form() . "\n";
5614         git_project_list_body(\@list, $order);
5615         git_footer_html();
5616 }
5617
5618 sub git_forks {
5619         my $order = $input_params{'order'};
5620         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5621                 die_error(400, "Unknown order parameter");
5622         }
5623
5624         my @list = git_get_projects_list($project);
5625         if (!@list) {
5626                 die_error(404, "No forks found");
5627         }
5628
5629         git_header_html();
5630         git_print_page_nav('','');
5631         git_print_header_div('summary', "$project forks");
5632         git_project_list_body(\@list, $order);
5633         git_footer_html();
5634 }
5635
5636 sub git_project_index {
5637         my @projects = git_get_projects_list();
5638         if (!@projects) {
5639                 die_error(404, "No projects found");
5640         }
5641
5642         print $cgi->header(
5643                 -type => 'text/plain',
5644                 -charset => 'utf-8',
5645                 -content_disposition => 'inline; filename="index.aux"');
5646
5647         foreach my $pr (@projects) {
5648                 if (!exists $pr->{'owner'}) {
5649                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5650                 }
5651
5652                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5653                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5654                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5655                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5656                 $path  =~ s/ /\+/g;
5657                 $owner =~ s/ /\+/g;
5658
5659                 print "$path $owner\n";
5660         }
5661 }
5662
5663 sub git_summary {
5664         my $descr = git_get_project_description($project) || "none";
5665         my %co = parse_commit("HEAD");
5666         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5667         my $head = $co{'id'};
5668         my $remote_heads = gitweb_check_feature('remote_heads');
5669
5670         my $owner = git_get_project_owner($project);
5671
5672         my $refs = git_get_references();
5673         # These get_*_list functions return one more to allow us to see if
5674         # there are more ...
5675         my @taglist  = git_get_tags_list(16);
5676         my @headlist = git_get_heads_list(16);
5677         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5678         my @forklist;
5679         my $check_forks = gitweb_check_feature('forks');
5680
5681         if ($check_forks) {
5682                 # find forks of a project
5683                 @forklist = git_get_projects_list($project);
5684                 # filter out forks of forks
5685                 @forklist = filter_forks_from_projects_list(\@forklist)
5686                         if (@forklist);
5687         }
5688
5689         git_header_html();
5690         git_print_page_nav('summary','', $head);
5691
5692         print "<div class=\"title\">&nbsp;</div>\n";
5693         print "<table class=\"projects_list\">\n" .
5694               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5695               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5696         if (defined $cd{'rfc2822'}) {
5697                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5698                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5699         }
5700
5701         # use per project git URL list in $projectroot/$project/cloneurl
5702         # or make project git URL from git base URL and project name
5703         my $url_tag = "URL";
5704         my @url_list = git_get_project_url_list($project);
5705         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5706         foreach my $git_url (@url_list) {
5707                 next unless $git_url;
5708                 print format_repo_url($url_tag, $git_url);
5709                 $url_tag = "";
5710         }
5711
5712         # Tag cloud
5713         my $show_ctags = gitweb_check_feature('ctags');
5714         if ($show_ctags) {
5715                 my $ctags = git_get_project_ctags($project);
5716                 if (%$ctags) {
5717                         # without ability to add tags, don't show if there are none
5718                         my $cloud = git_populate_project_tagcloud($ctags);
5719                         print "<tr id=\"metadata_ctags\">" .
5720                               "<td>content tags</td>" .
5721                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
5722                               "</tr>\n";
5723                 }
5724         }
5725
5726         print "</table>\n";
5727
5728         # If XSS prevention is on, we don't include README.html.
5729         # TODO: Allow a readme in some safe format.
5730         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5731                 print "<div class=\"title\">readme</div>\n" .
5732                       "<div class=\"readme\">\n";
5733                 insert_file("$projectroot/$project/README.html");
5734                 print "\n</div>\n"; # class="readme"
5735         }
5736
5737         # we need to request one more than 16 (0..15) to check if
5738         # those 16 are all
5739         my @commitlist = $head ? parse_commits($head, 17) : ();
5740         if (@commitlist) {
5741                 git_print_header_div('shortlog');
5742                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5743                                   $#commitlist <=  15 ? undef :
5744                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5745         }
5746
5747         if (@taglist) {
5748                 git_print_header_div('tags');
5749                 git_tags_body(\@taglist, 0, 15,
5750                               $#taglist <=  15 ? undef :
5751                               $cgi->a({-href => href(action=>"tags")}, "..."));
5752         }
5753
5754         if (@headlist) {
5755                 git_print_header_div('heads');
5756                 git_heads_body(\@headlist, $head, 0, 15,
5757                                $#headlist <= 15 ? undef :
5758                                $cgi->a({-href => href(action=>"heads")}, "..."));
5759         }
5760
5761         if (%remotedata) {
5762                 git_print_header_div('remotes');
5763                 git_remotes_body(\%remotedata, 15, $head);
5764         }
5765
5766         if (@forklist) {
5767                 git_print_header_div('forks');
5768                 git_project_list_body(\@forklist, 'age', 0, 15,
5769                                       $#forklist <= 15 ? undef :
5770                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5771                                       'no_header');
5772         }
5773
5774         git_footer_html();
5775 }
5776
5777 sub git_tag {
5778         my %tag = parse_tag($hash);
5779
5780         if (! %tag) {
5781                 die_error(404, "Unknown tag object");
5782         }
5783
5784         my $head = git_get_head_hash($project);
5785         git_header_html();
5786         git_print_page_nav('','', $head,undef,$head);
5787         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5788         print "<div class=\"title_text\">\n" .
5789               "<table class=\"object_header\">\n" .
5790               "<tr>\n" .
5791               "<td>object</td>\n" .
5792               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5793                                $tag{'object'}) . "</td>\n" .
5794               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5795                                               $tag{'type'}) . "</td>\n" .
5796               "</tr>\n";
5797         if (defined($tag{'author'})) {
5798                 git_print_authorship_rows(\%tag, 'author');
5799         }
5800         print "</table>\n\n" .
5801               "</div>\n";
5802         print "<div class=\"page_body\">";
5803         my $comment = $tag{'comment'};
5804         foreach my $line (@$comment) {
5805                 chomp $line;
5806                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5807         }
5808         print "</div>\n";
5809         git_footer_html();
5810 }
5811
5812 sub git_blame_common {
5813         my $format = shift || 'porcelain';
5814         if ($format eq 'porcelain' && $cgi->param('js')) {
5815                 $format = 'incremental';
5816                 $action = 'blame_incremental'; # for page title etc
5817         }
5818
5819         # permissions
5820         gitweb_check_feature('blame')
5821                 or die_error(403, "Blame view not allowed");
5822
5823         # error checking
5824         die_error(400, "No file name given") unless $file_name;
5825         $hash_base ||= git_get_head_hash($project);
5826         die_error(404, "Couldn't find base commit") unless $hash_base;
5827         my %co = parse_commit($hash_base)
5828                 or die_error(404, "Commit not found");
5829         my $ftype = "blob";
5830         if (!defined $hash) {
5831                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5832                         or die_error(404, "Error looking up file");
5833         } else {
5834                 $ftype = git_get_type($hash);
5835                 if ($ftype !~ "blob") {
5836                         die_error(400, "Object is not a blob");
5837                 }
5838         }
5839
5840         my $fd;
5841         if ($format eq 'incremental') {
5842                 # get file contents (as base)
5843                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5844                         or die_error(500, "Open git-cat-file failed");
5845         } elsif ($format eq 'data') {
5846                 # run git-blame --incremental
5847                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5848                         $hash_base, "--", $file_name
5849                         or die_error(500, "Open git-blame --incremental failed");
5850         } else {
5851                 # run git-blame --porcelain
5852                 open $fd, "-|", git_cmd(), "blame", '-p',
5853                         $hash_base, '--', $file_name
5854                         or die_error(500, "Open git-blame --porcelain failed");
5855         }
5856
5857         # incremental blame data returns early
5858         if ($format eq 'data') {
5859                 print $cgi->header(
5860                         -type=>"text/plain", -charset => "utf-8",
5861                         -status=> "200 OK");
5862                 local $| = 1; # output autoflush
5863                 print while <$fd>;
5864                 close $fd
5865                         or print "ERROR $!\n";
5866
5867                 print 'END';
5868                 if (defined $t0 && gitweb_check_feature('timed')) {
5869                         print ' '.
5870                               tv_interval($t0, [ gettimeofday() ]).
5871                               ' '.$number_of_git_cmds;
5872                 }
5873                 print "\n";
5874
5875                 return;
5876         }
5877
5878         # page header
5879         git_header_html();
5880         my $formats_nav =
5881                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5882                         "blob") .
5883                 " | ";
5884         if ($format eq 'incremental') {
5885                 $formats_nav .=
5886                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5887                                 "blame") . " (non-incremental)";
5888         } else {
5889                 $formats_nav .=
5890                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5891                                 "blame") . " (incremental)";
5892         }
5893         $formats_nav .=
5894                 " | " .
5895                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5896                         "history") .
5897                 " | " .
5898                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5899                         "HEAD");
5900         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5901         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5902         git_print_page_path($file_name, $ftype, $hash_base);
5903
5904         # page body
5905         if ($format eq 'incremental') {
5906                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5907                       "This page requires JavaScript to run.\n Use ".
5908                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5909                               'this page').
5910                       " instead.\n".
5911                       "</b></center></div>\n</noscript>\n";
5912
5913                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5914         }
5915
5916         print qq!<div class="page_body">\n!;
5917         print qq!<div id="progress_info">... / ...</div>\n!
5918                 if ($format eq 'incremental');
5919         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5920               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5921               qq!<thead>\n!.
5922               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5923               qq!</thead>\n!.
5924               qq!<tbody>\n!;
5925
5926         my @rev_color = qw(light dark);
5927         my $num_colors = scalar(@rev_color);
5928         my $current_color = 0;
5929
5930         if ($format eq 'incremental') {
5931                 my $color_class = $rev_color[$current_color];
5932
5933                 #contents of a file
5934                 my $linenr = 0;
5935         LINE:
5936                 while (my $line = <$fd>) {
5937                         chomp $line;
5938                         $linenr++;
5939
5940                         print qq!<tr id="l$linenr" class="$color_class">!.
5941                               qq!<td class="sha1"><a href=""> </a></td>!.
5942                               qq!<td class="linenr">!.
5943                               qq!<a class="linenr" href="">$linenr</a></td>!;
5944                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5945                         print qq!</tr>\n!;
5946                 }
5947
5948         } else { # porcelain, i.e. ordinary blame
5949                 my %metainfo = (); # saves information about commits
5950
5951                 # blame data
5952         LINE:
5953                 while (my $line = <$fd>) {
5954                         chomp $line;
5955                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5956                         # no <lines in group> for subsequent lines in group of lines
5957                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5958                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5959                         if (!exists $metainfo{$full_rev}) {
5960                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5961                         }
5962                         my $meta = $metainfo{$full_rev};
5963                         my $data;
5964                         while ($data = <$fd>) {
5965                                 chomp $data;
5966                                 last if ($data =~ s/^\t//); # contents of line
5967                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5968                                         $meta->{$1} = $2 unless exists $meta->{$1};
5969                                 }
5970                                 if ($data =~ /^previous /) {
5971                                         $meta->{'nprevious'}++;
5972                                 }
5973                         }
5974                         my $short_rev = substr($full_rev, 0, 8);
5975                         my $author = $meta->{'author'};
5976                         my %date =
5977                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5978                         my $date = $date{'iso-tz'};
5979                         if ($group_size) {
5980                                 $current_color = ($current_color + 1) % $num_colors;
5981                         }
5982                         my $tr_class = $rev_color[$current_color];
5983                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5984                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5985                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5986                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5987                         if ($group_size) {
5988                                 print "<td class=\"sha1\"";
5989                                 print " title=\"". esc_html($author) . ", $date\"";
5990                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5991                                 print ">";
5992                                 print $cgi->a({-href => href(action=>"commit",
5993                                                              hash=>$full_rev,
5994                                                              file_name=>$file_name)},
5995                                               esc_html($short_rev));
5996                                 if ($group_size >= 2) {
5997                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5998                                         if (@author_initials) {
5999                                                 print "<br />" .
6000                                                       esc_html(join('', @author_initials));
6001                                                 #           or join('.', ...)
6002                                         }
6003                                 }
6004                                 print "</td>\n";
6005                         }
6006                         # 'previous' <sha1 of parent commit> <filename at commit>
6007                         if (exists $meta->{'previous'} &&
6008                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6009                                 $meta->{'parent'} = $1;
6010                                 $meta->{'file_parent'} = unquote($2);
6011                         }
6012                         my $linenr_commit =
6013                                 exists($meta->{'parent'}) ?
6014                                 $meta->{'parent'} : $full_rev;
6015                         my $linenr_filename =
6016                                 exists($meta->{'file_parent'}) ?
6017                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6018                         my $blamed = href(action => 'blame',
6019                                           file_name => $linenr_filename,
6020                                           hash_base => $linenr_commit);
6021                         print "<td class=\"linenr\">";
6022                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6023                                         -class => "linenr" },
6024                                       esc_html($lineno));
6025                         print "</td>";
6026                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6027                         print "</tr>\n";
6028                 } # end while
6029
6030         }
6031
6032         # footer
6033         print "</tbody>\n".
6034               "</table>\n"; # class="blame"
6035         print "</div>\n";   # class="blame_body"
6036         close $fd
6037                 or print "Reading blob failed\n";
6038
6039         git_footer_html();
6040 }
6041
6042 sub git_blame {
6043         git_blame_common();
6044 }
6045
6046 sub git_blame_incremental {
6047         git_blame_common('incremental');
6048 }
6049
6050 sub git_blame_data {
6051         git_blame_common('data');
6052 }
6053
6054 sub git_tags {
6055         my $head = git_get_head_hash($project);
6056         git_header_html();
6057         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6058         git_print_header_div('summary', $project);
6059
6060         my @tagslist = git_get_tags_list();
6061         if (@tagslist) {
6062                 git_tags_body(\@tagslist);
6063         }
6064         git_footer_html();
6065 }
6066
6067 sub git_heads {
6068         my $head = git_get_head_hash($project);
6069         git_header_html();
6070         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6071         git_print_header_div('summary', $project);
6072
6073         my @headslist = git_get_heads_list();
6074         if (@headslist) {
6075                 git_heads_body(\@headslist, $head);
6076         }
6077         git_footer_html();
6078 }
6079
6080 # used both for single remote view and for list of all the remotes
6081 sub git_remotes {
6082         gitweb_check_feature('remote_heads')
6083                 or die_error(403, "Remote heads view is disabled");
6084
6085         my $head = git_get_head_hash($project);
6086         my $remote = $input_params{'hash'};
6087
6088         my $remotedata = git_get_remotes_list($remote);
6089         die_error(500, "Unable to get remote information") unless defined $remotedata;
6090
6091         unless (%$remotedata) {
6092                 die_error(404, defined $remote ?
6093                         "Remote $remote not found" :
6094                         "No remotes found");
6095         }
6096
6097         git_header_html(undef, undef, -action_extra => $remote);
6098         git_print_page_nav('', '',  $head, undef, $head,
6099                 format_ref_views($remote ? '' : 'remotes'));
6100
6101         fill_remote_heads($remotedata);
6102         if (defined $remote) {
6103                 git_print_header_div('remotes', "$remote remote for $project");
6104                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6105         } else {
6106                 git_print_header_div('summary', "$project remotes");
6107                 git_remotes_body($remotedata, undef, $head);
6108         }
6109
6110         git_footer_html();
6111 }
6112
6113 sub git_blob_plain {
6114         my $type = shift;
6115         my $expires;
6116
6117         if (!defined $hash) {
6118                 if (defined $file_name) {
6119                         my $base = $hash_base || git_get_head_hash($project);
6120                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6121                                 or die_error(404, "Cannot find file");
6122                 } else {
6123                         die_error(400, "No file name defined");
6124                 }
6125         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6126                 # blobs defined by non-textual hash id's can be cached
6127                 $expires = "+1d";
6128         }
6129
6130         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6131                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6132
6133         # content-type (can include charset)
6134         $type = blob_contenttype($fd, $file_name, $type);
6135
6136         # "save as" filename, even when no $file_name is given
6137         my $save_as = "$hash";
6138         if (defined $file_name) {
6139                 $save_as = $file_name;
6140         } elsif ($type =~ m/^text\//) {
6141                 $save_as .= '.txt';
6142         }
6143
6144         # With XSS prevention on, blobs of all types except a few known safe
6145         # ones are served with "Content-Disposition: attachment" to make sure
6146         # they don't run in our security domain.  For certain image types,
6147         # blob view writes an <img> tag referring to blob_plain view, and we
6148         # want to be sure not to break that by serving the image as an
6149         # attachment (though Firefox 3 doesn't seem to care).
6150         my $sandbox = $prevent_xss &&
6151                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
6152
6153         print $cgi->header(
6154                 -type => $type,
6155                 -expires => $expires,
6156                 -content_disposition =>
6157                         ($sandbox ? 'attachment' : 'inline')
6158                         . '; filename="' . $save_as . '"');
6159         local $/ = undef;
6160         binmode STDOUT, ':raw';
6161         print <$fd>;
6162         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6163         close $fd;
6164 }
6165
6166 sub git_blob {
6167         my $expires;
6168
6169         if (!defined $hash) {
6170                 if (defined $file_name) {
6171                         my $base = $hash_base || git_get_head_hash($project);
6172                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6173                                 or die_error(404, "Cannot find file");
6174                 } else {
6175                         die_error(400, "No file name defined");
6176                 }
6177         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6178                 # blobs defined by non-textual hash id's can be cached
6179                 $expires = "+1d";
6180         }
6181
6182         my $have_blame = gitweb_check_feature('blame');
6183         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6184                 or die_error(500, "Couldn't cat $file_name, $hash");
6185         my $mimetype = blob_mimetype($fd, $file_name);
6186         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6187         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6188                 close $fd;
6189                 return git_blob_plain($mimetype);
6190         }
6191         # we can have blame only for text/* mimetype
6192         $have_blame &&= ($mimetype =~ m!^text/!);
6193
6194         my $highlight = gitweb_check_feature('highlight');
6195         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6196         $fd = run_highlighter($fd, $highlight, $syntax)
6197                 if $syntax;
6198
6199         git_header_html(undef, $expires);
6200         my $formats_nav = '';
6201         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6202                 if (defined $file_name) {
6203                         if ($have_blame) {
6204                                 $formats_nav .=
6205                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6206                                                 "blame") .
6207                                         " | ";
6208                         }
6209                         $formats_nav .=
6210                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6211                                         "history") .
6212                                 " | " .
6213                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6214                                         "raw") .
6215                                 " | " .
6216                                 $cgi->a({-href => href(action=>"blob",
6217                                                        hash_base=>"HEAD", file_name=>$file_name)},
6218                                         "HEAD");
6219                 } else {
6220                         $formats_nav .=
6221                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6222                                         "raw");
6223                 }
6224                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6225                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6226         } else {
6227                 print "<div class=\"page_nav\">\n" .
6228                       "<br/><br/></div>\n" .
6229                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6230         }
6231         git_print_page_path($file_name, "blob", $hash_base);
6232         print "<div class=\"page_body\">\n";
6233         if ($mimetype =~ m!^image/!) {
6234                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6235                 if ($file_name) {
6236                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6237                 }
6238                 print qq! src="! .
6239                       href(action=>"blob_plain", hash=>$hash,
6240                            hash_base=>$hash_base, file_name=>$file_name) .
6241                       qq!" />\n!;
6242         } else {
6243                 my $nr;
6244                 while (my $line = <$fd>) {
6245                         chomp $line;
6246                         $nr++;
6247                         $line = untabify($line);
6248                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6249                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6250                 }
6251         }
6252         close $fd
6253                 or print "Reading blob failed.\n";
6254         print "</div>";
6255         git_footer_html();
6256 }
6257
6258 sub git_tree {
6259         if (!defined $hash_base) {
6260                 $hash_base = "HEAD";
6261         }
6262         if (!defined $hash) {
6263                 if (defined $file_name) {
6264                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6265                 } else {
6266                         $hash = $hash_base;
6267                 }
6268         }
6269         die_error(404, "No such tree") unless defined($hash);
6270
6271         my $show_sizes = gitweb_check_feature('show-sizes');
6272         my $have_blame = gitweb_check_feature('blame');
6273
6274         my @entries = ();
6275         {
6276                 local $/ = "\0";
6277                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6278                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6279                         or die_error(500, "Open git-ls-tree failed");
6280                 @entries = map { chomp; $_ } <$fd>;
6281                 close $fd
6282                         or die_error(404, "Reading tree failed");
6283         }
6284
6285         my $refs = git_get_references();
6286         my $ref = format_ref_marker($refs, $hash_base);
6287         git_header_html();
6288         my $basedir = '';
6289         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6290                 my @views_nav = ();
6291                 if (defined $file_name) {
6292                         push @views_nav,
6293                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6294                                         "history"),
6295                                 $cgi->a({-href => href(action=>"tree",
6296                                                        hash_base=>"HEAD", file_name=>$file_name)},
6297                                         "HEAD"),
6298                 }
6299                 my $snapshot_links = format_snapshot_links($hash);
6300                 if (defined $snapshot_links) {
6301                         # FIXME: Should be available when we have no hash base as well.
6302                         push @views_nav, $snapshot_links;
6303                 }
6304                 git_print_page_nav('tree','', $hash_base, undef, undef,
6305                                    join(' | ', @views_nav));
6306                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6307         } else {
6308                 undef $hash_base;
6309                 print "<div class=\"page_nav\">\n";
6310                 print "<br/><br/></div>\n";
6311                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6312         }
6313         if (defined $file_name) {
6314                 $basedir = $file_name;
6315                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6316                         $basedir .= '/';
6317                 }
6318                 git_print_page_path($file_name, 'tree', $hash_base);
6319         }
6320         print "<div class=\"page_body\">\n";
6321         print "<table class=\"tree\">\n";
6322         my $alternate = 1;
6323         # '..' (top directory) link if possible
6324         if (defined $hash_base &&
6325             defined $file_name && $file_name =~ m![^/]+$!) {
6326                 if ($alternate) {
6327                         print "<tr class=\"dark\">\n";
6328                 } else {
6329                         print "<tr class=\"light\">\n";
6330                 }
6331                 $alternate ^= 1;
6332
6333                 my $up = $file_name;
6334                 $up =~ s!/?[^/]+$!!;
6335                 undef $up unless $up;
6336                 # based on git_print_tree_entry
6337                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6338                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6339                 print '<td class="list">';
6340                 print $cgi->a({-href => href(action=>"tree",
6341                                              hash_base=>$hash_base,
6342                                              file_name=>$up)},
6343                               "..");
6344                 print "</td>\n";
6345                 print "<td class=\"link\"></td>\n";
6346
6347                 print "</tr>\n";
6348         }
6349         foreach my $line (@entries) {
6350                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6351
6352                 if ($alternate) {
6353                         print "<tr class=\"dark\">\n";
6354                 } else {
6355                         print "<tr class=\"light\">\n";
6356                 }
6357                 $alternate ^= 1;
6358
6359                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6360
6361                 print "</tr>\n";
6362         }
6363         print "</table>\n" .
6364               "</div>";
6365         git_footer_html();
6366 }
6367
6368 sub snapshot_name {
6369         my ($project, $hash) = @_;
6370
6371         # path/to/project.git  -> project
6372         # path/to/project/.git -> project
6373         my $name = to_utf8($project);
6374         $name =~ s,([^/])/*\.git$,$1,;
6375         $name = basename($name);
6376         # sanitize name
6377         $name =~ s/[[:cntrl:]]/?/g;
6378
6379         my $ver = $hash;
6380         if ($hash =~ /^[0-9a-fA-F]+$/) {
6381                 # shorten SHA-1 hash
6382                 my $full_hash = git_get_full_hash($project, $hash);
6383                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6384                         $ver = git_get_short_hash($project, $hash);
6385                 }
6386         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6387                 # tags don't need shortened SHA-1 hash
6388                 $ver = $1;
6389         } else {
6390                 # branches and other need shortened SHA-1 hash
6391                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6392                         $ver = $1;
6393                 }
6394                 $ver .= '-' . git_get_short_hash($project, $hash);
6395         }
6396         # in case of hierarchical branch names
6397         $ver =~ s!/!.!g;
6398
6399         # name = project-version_string
6400         $name = "$name-$ver";
6401
6402         return wantarray ? ($name, $name) : $name;
6403 }
6404
6405 sub git_snapshot {
6406         my $format = $input_params{'snapshot_format'};
6407         if (!@snapshot_fmts) {
6408                 die_error(403, "Snapshots not allowed");
6409         }
6410         # default to first supported snapshot format
6411         $format ||= $snapshot_fmts[0];
6412         if ($format !~ m/^[a-z0-9]+$/) {
6413                 die_error(400, "Invalid snapshot format parameter");
6414         } elsif (!exists($known_snapshot_formats{$format})) {
6415                 die_error(400, "Unknown snapshot format");
6416         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6417                 die_error(403, "Snapshot format not allowed");
6418         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6419                 die_error(403, "Unsupported snapshot format");
6420         }
6421
6422         my $type = git_get_type("$hash^{}");
6423         if (!$type) {
6424                 die_error(404, 'Object does not exist');
6425         }  elsif ($type eq 'blob') {
6426                 die_error(400, 'Object is not a tree-ish');
6427         }
6428
6429         my ($name, $prefix) = snapshot_name($project, $hash);
6430         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6431         my $cmd = quote_command(
6432                 git_cmd(), 'archive',
6433                 "--format=$known_snapshot_formats{$format}{'format'}",
6434                 "--prefix=$prefix/", $hash);
6435         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6436                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6437         }
6438
6439         $filename =~ s/(["\\])/\\$1/g;
6440         print $cgi->header(
6441                 -type => $known_snapshot_formats{$format}{'type'},
6442                 -content_disposition => 'inline; filename="' . $filename . '"',
6443                 -status => '200 OK');
6444
6445         open my $fd, "-|", $cmd
6446                 or die_error(500, "Execute git-archive failed");
6447         binmode STDOUT, ':raw';
6448         print <$fd>;
6449         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6450         close $fd;
6451 }
6452
6453 sub git_log_generic {
6454         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6455
6456         my $head = git_get_head_hash($project);
6457         if (!defined $base) {
6458                 $base = $head;
6459         }
6460         if (!defined $page) {
6461                 $page = 0;
6462         }
6463         my $refs = git_get_references();
6464
6465         my $commit_hash = $base;
6466         if (defined $parent) {
6467                 $commit_hash = "$parent..$base";
6468         }
6469         my @commitlist =
6470                 parse_commits($commit_hash, 101, (100 * $page),
6471                               defined $file_name ? ($file_name, "--full-history") : ());
6472
6473         my $ftype;
6474         if (!defined $file_hash && defined $file_name) {
6475                 # some commits could have deleted file in question,
6476                 # and not have it in tree, but one of them has to have it
6477                 for (my $i = 0; $i < @commitlist; $i++) {
6478                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6479                         last if defined $file_hash;
6480                 }
6481         }
6482         if (defined $file_hash) {
6483                 $ftype = git_get_type($file_hash);
6484         }
6485         if (defined $file_name && !defined $ftype) {
6486                 die_error(500, "Unknown type of object");
6487         }
6488         my %co;
6489         if (defined $file_name) {
6490                 %co = parse_commit($base)
6491                         or die_error(404, "Unknown commit object");
6492         }
6493
6494
6495         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6496         my $next_link = '';
6497         if ($#commitlist >= 100) {
6498                 $next_link =
6499                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6500                                  -accesskey => "n", -title => "Alt-n"}, "next");
6501         }
6502         my $patch_max = gitweb_get_feature('patches');
6503         if ($patch_max && !defined $file_name) {
6504                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6505                         $paging_nav .= " &sdot; " .
6506                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6507                                         "patches");
6508                 }
6509         }
6510
6511         git_header_html();
6512         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6513         if (defined $file_name) {
6514                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6515         } else {
6516                 git_print_header_div('summary', $project)
6517         }
6518         git_print_page_path($file_name, $ftype, $hash_base)
6519                 if (defined $file_name);
6520
6521         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6522                      $file_name, $file_hash, $ftype);
6523
6524         git_footer_html();
6525 }
6526
6527 sub git_log {
6528         git_log_generic('log', \&git_log_body,
6529                         $hash, $hash_parent);
6530 }
6531
6532 sub git_commit {
6533         $hash ||= $hash_base || "HEAD";
6534         my %co = parse_commit($hash)
6535             or die_error(404, "Unknown commit object");
6536
6537         my $parent  = $co{'parent'};
6538         my $parents = $co{'parents'}; # listref
6539
6540         # we need to prepare $formats_nav before any parameter munging
6541         my $formats_nav;
6542         if (!defined $parent) {
6543                 # --root commitdiff
6544                 $formats_nav .= '(initial)';
6545         } elsif (@$parents == 1) {
6546                 # single parent commit
6547                 $formats_nav .=
6548                         '(parent: ' .
6549                         $cgi->a({-href => href(action=>"commit",
6550                                                hash=>$parent)},
6551                                 esc_html(substr($parent, 0, 7))) .
6552                         ')';
6553         } else {
6554                 # merge commit
6555                 $formats_nav .=
6556                         '(merge: ' .
6557                         join(' ', map {
6558                                 $cgi->a({-href => href(action=>"commit",
6559                                                        hash=>$_)},
6560                                         esc_html(substr($_, 0, 7)));
6561                         } @$parents ) .
6562                         ')';
6563         }
6564         if (gitweb_check_feature('patches') && @$parents <= 1) {
6565                 $formats_nav .= " | " .
6566                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6567                                 "patch");
6568         }
6569
6570         if (!defined $parent) {
6571                 $parent = "--root";
6572         }
6573         my @difftree;
6574         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6575                 @diff_opts,
6576                 (@$parents <= 1 ? $parent : '-c'),
6577                 $hash, "--"
6578                 or die_error(500, "Open git-diff-tree failed");
6579         @difftree = map { chomp; $_ } <$fd>;
6580         close $fd or die_error(404, "Reading git-diff-tree failed");
6581
6582         # non-textual hash id's can be cached
6583         my $expires;
6584         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6585                 $expires = "+1d";
6586         }
6587         my $refs = git_get_references();
6588         my $ref = format_ref_marker($refs, $co{'id'});
6589
6590         git_header_html(undef, $expires);
6591         git_print_page_nav('commit', '',
6592                            $hash, $co{'tree'}, $hash,
6593                            $formats_nav);
6594
6595         if (defined $co{'parent'}) {
6596                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6597         } else {
6598                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6599         }
6600         print "<div class=\"title_text\">\n" .
6601               "<table class=\"object_header\">\n";
6602         git_print_authorship_rows(\%co);
6603         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6604         print "<tr>" .
6605               "<td>tree</td>" .
6606               "<td class=\"sha1\">" .
6607               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6608                        class => "list"}, $co{'tree'}) .
6609               "</td>" .
6610               "<td class=\"link\">" .
6611               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6612                       "tree");
6613         my $snapshot_links = format_snapshot_links($hash);
6614         if (defined $snapshot_links) {
6615                 print " | " . $snapshot_links;
6616         }
6617         print "</td>" .
6618               "</tr>\n";
6619
6620         foreach my $par (@$parents) {
6621                 print "<tr>" .
6622                       "<td>parent</td>" .
6623                       "<td class=\"sha1\">" .
6624                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6625                                class => "list"}, $par) .
6626                       "</td>" .
6627                       "<td class=\"link\">" .
6628                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6629                       " | " .
6630                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6631                       "</td>" .
6632                       "</tr>\n";
6633         }
6634         print "</table>".
6635               "</div>\n";
6636
6637         print "<div class=\"page_body\">\n";
6638         git_print_log($co{'comment'});
6639         print "</div>\n";
6640
6641         git_difftree_body(\@difftree, $hash, @$parents);
6642
6643         git_footer_html();
6644 }
6645
6646 sub git_object {
6647         # object is defined by:
6648         # - hash or hash_base alone
6649         # - hash_base and file_name
6650         my $type;
6651
6652         # - hash or hash_base alone
6653         if ($hash || ($hash_base && !defined $file_name)) {
6654                 my $object_id = $hash || $hash_base;
6655
6656                 open my $fd, "-|", quote_command(
6657                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6658                         or die_error(404, "Object does not exist");
6659                 $type = <$fd>;
6660                 chomp $type;
6661                 close $fd
6662                         or die_error(404, "Object does not exist");
6663
6664         # - hash_base and file_name
6665         } elsif ($hash_base && defined $file_name) {
6666                 $file_name =~ s,/+$,,;
6667
6668                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6669                         or die_error(404, "Base object does not exist");
6670
6671                 # here errors should not hapen
6672                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6673                         or die_error(500, "Open git-ls-tree failed");
6674                 my $line = <$fd>;
6675                 close $fd;
6676
6677                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6678                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6679                         die_error(404, "File or directory for given base does not exist");
6680                 }
6681                 $type = $2;
6682                 $hash = $3;
6683         } else {
6684                 die_error(400, "Not enough information to find object");
6685         }
6686
6687         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6688                                           hash=>$hash, hash_base=>$hash_base,
6689                                           file_name=>$file_name),
6690                              -status => '302 Found');
6691 }
6692
6693 sub git_blobdiff {
6694         my $format = shift || 'html';
6695
6696         my $fd;
6697         my @difftree;
6698         my %diffinfo;
6699         my $expires;
6700
6701         # preparing $fd and %diffinfo for git_patchset_body
6702         # new style URI
6703         if (defined $hash_base && defined $hash_parent_base) {
6704                 if (defined $file_name) {
6705                         # read raw output
6706                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6707                                 $hash_parent_base, $hash_base,
6708                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6709                                 or die_error(500, "Open git-diff-tree failed");
6710                         @difftree = map { chomp; $_ } <$fd>;
6711                         close $fd
6712                                 or die_error(404, "Reading git-diff-tree failed");
6713                         @difftree
6714                                 or die_error(404, "Blob diff not found");
6715
6716                 } elsif (defined $hash &&
6717                          $hash =~ /[0-9a-fA-F]{40}/) {
6718                         # try to find filename from $hash
6719
6720                         # read filtered raw output
6721                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6722                                 $hash_parent_base, $hash_base, "--"
6723                                 or die_error(500, "Open git-diff-tree failed");
6724                         @difftree =
6725                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6726                                 # $hash == to_id
6727                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6728                                 map { chomp; $_ } <$fd>;
6729                         close $fd
6730                                 or die_error(404, "Reading git-diff-tree failed");
6731                         @difftree
6732                                 or die_error(404, "Blob diff not found");
6733
6734                 } else {
6735                         die_error(400, "Missing one of the blob diff parameters");
6736                 }
6737
6738                 if (@difftree > 1) {
6739                         die_error(400, "Ambiguous blob diff specification");
6740                 }
6741
6742                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6743                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6744                 $file_name   ||= $diffinfo{'to_file'};
6745
6746                 $hash_parent ||= $diffinfo{'from_id'};
6747                 $hash        ||= $diffinfo{'to_id'};
6748
6749                 # non-textual hash id's can be cached
6750                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6751                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6752                         $expires = '+1d';
6753                 }
6754
6755                 # open patch output
6756                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6757                         '-p', ($format eq 'html' ? "--full-index" : ()),
6758                         $hash_parent_base, $hash_base,
6759                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6760                         or die_error(500, "Open git-diff-tree failed");
6761         }
6762
6763         # old/legacy style URI -- not generated anymore since 1.4.3.
6764         if (!%diffinfo) {
6765                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6766         }
6767
6768         # header
6769         if ($format eq 'html') {
6770                 my $formats_nav =
6771                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6772                                 "raw");
6773                 git_header_html(undef, $expires);
6774                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6775                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6776                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6777                 } else {
6778                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6779                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6780                 }
6781                 if (defined $file_name) {
6782                         git_print_page_path($file_name, "blob", $hash_base);
6783                 } else {
6784                         print "<div class=\"page_path\"></div>\n";
6785                 }
6786
6787         } elsif ($format eq 'plain') {
6788                 print $cgi->header(
6789                         -type => 'text/plain',
6790                         -charset => 'utf-8',
6791                         -expires => $expires,
6792                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6793
6794                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6795
6796         } else {
6797                 die_error(400, "Unknown blobdiff format");
6798         }
6799
6800         # patch
6801         if ($format eq 'html') {
6802                 print "<div class=\"page_body\">\n";
6803
6804                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6805                 close $fd;
6806
6807                 print "</div>\n"; # class="page_body"
6808                 git_footer_html();
6809
6810         } else {
6811                 while (my $line = <$fd>) {
6812                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6813                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6814
6815                         print $line;
6816
6817                         last if $line =~ m!^\+\+\+!;
6818                 }
6819                 local $/ = undef;
6820                 print <$fd>;
6821                 close $fd;
6822         }
6823 }
6824
6825 sub git_blobdiff_plain {
6826         git_blobdiff('plain');
6827 }
6828
6829 sub git_commitdiff {
6830         my %params = @_;
6831         my $format = $params{-format} || 'html';
6832
6833         my ($patch_max) = gitweb_get_feature('patches');
6834         if ($format eq 'patch') {
6835                 die_error(403, "Patch view not allowed") unless $patch_max;
6836         }
6837
6838         $hash ||= $hash_base || "HEAD";
6839         my %co = parse_commit($hash)
6840             or die_error(404, "Unknown commit object");
6841
6842         # choose format for commitdiff for merge
6843         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6844                 $hash_parent = '--cc';
6845         }
6846         # we need to prepare $formats_nav before almost any parameter munging
6847         my $formats_nav;
6848         if ($format eq 'html') {
6849                 $formats_nav =
6850                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6851                                 "raw");
6852                 if ($patch_max && @{$co{'parents'}} <= 1) {
6853                         $formats_nav .= " | " .
6854                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6855                                         "patch");
6856                 }
6857
6858                 if (defined $hash_parent &&
6859                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6860                         # commitdiff with two commits given
6861                         my $hash_parent_short = $hash_parent;
6862                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6863                                 $hash_parent_short = substr($hash_parent, 0, 7);
6864                         }
6865                         $formats_nav .=
6866                                 ' (from';
6867                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6868                                 if ($co{'parents'}[$i] eq $hash_parent) {
6869                                         $formats_nav .= ' parent ' . ($i+1);
6870                                         last;
6871                                 }
6872                         }
6873                         $formats_nav .= ': ' .
6874                                 $cgi->a({-href => href(action=>"commitdiff",
6875                                                        hash=>$hash_parent)},
6876                                         esc_html($hash_parent_short)) .
6877                                 ')';
6878                 } elsif (!$co{'parent'}) {
6879                         # --root commitdiff
6880                         $formats_nav .= ' (initial)';
6881                 } elsif (scalar @{$co{'parents'}} == 1) {
6882                         # single parent commit
6883                         $formats_nav .=
6884                                 ' (parent: ' .
6885                                 $cgi->a({-href => href(action=>"commitdiff",
6886                                                        hash=>$co{'parent'})},
6887                                         esc_html(substr($co{'parent'}, 0, 7))) .
6888                                 ')';
6889                 } else {
6890                         # merge commit
6891                         if ($hash_parent eq '--cc') {
6892                                 $formats_nav .= ' | ' .
6893                                         $cgi->a({-href => href(action=>"commitdiff",
6894                                                                hash=>$hash, hash_parent=>'-c')},
6895                                                 'combined');
6896                         } else { # $hash_parent eq '-c'
6897                                 $formats_nav .= ' | ' .
6898                                         $cgi->a({-href => href(action=>"commitdiff",
6899                                                                hash=>$hash, hash_parent=>'--cc')},
6900                                                 'compact');
6901                         }
6902                         $formats_nav .=
6903                                 ' (merge: ' .
6904                                 join(' ', map {
6905                                         $cgi->a({-href => href(action=>"commitdiff",
6906                                                                hash=>$_)},
6907                                                 esc_html(substr($_, 0, 7)));
6908                                 } @{$co{'parents'}} ) .
6909                                 ')';
6910                 }
6911         }
6912
6913         my $hash_parent_param = $hash_parent;
6914         if (!defined $hash_parent_param) {
6915                 # --cc for multiple parents, --root for parentless
6916                 $hash_parent_param =
6917                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6918         }
6919
6920         # read commitdiff
6921         my $fd;
6922         my @difftree;
6923         if ($format eq 'html') {
6924                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6925                         "--no-commit-id", "--patch-with-raw", "--full-index",
6926                         $hash_parent_param, $hash, "--"
6927                         or die_error(500, "Open git-diff-tree failed");
6928
6929                 while (my $line = <$fd>) {
6930                         chomp $line;
6931                         # empty line ends raw part of diff-tree output
6932                         last unless $line;
6933                         push @difftree, scalar parse_difftree_raw_line($line);
6934                 }
6935
6936         } elsif ($format eq 'plain') {
6937                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6938                         '-p', $hash_parent_param, $hash, "--"
6939                         or die_error(500, "Open git-diff-tree failed");
6940         } elsif ($format eq 'patch') {
6941                 # For commit ranges, we limit the output to the number of
6942                 # patches specified in the 'patches' feature.
6943                 # For single commits, we limit the output to a single patch,
6944                 # diverging from the git-format-patch default.
6945                 my @commit_spec = ();
6946                 if ($hash_parent) {
6947                         if ($patch_max > 0) {
6948                                 push @commit_spec, "-$patch_max";
6949                         }
6950                         push @commit_spec, '-n', "$hash_parent..$hash";
6951                 } else {
6952                         if ($params{-single}) {
6953                                 push @commit_spec, '-1';
6954                         } else {
6955                                 if ($patch_max > 0) {
6956                                         push @commit_spec, "-$patch_max";
6957                                 }
6958                                 push @commit_spec, "-n";
6959                         }
6960                         push @commit_spec, '--root', $hash;
6961                 }
6962                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6963                         '--encoding=utf8', '--stdout', @commit_spec
6964                         or die_error(500, "Open git-format-patch failed");
6965         } else {
6966                 die_error(400, "Unknown commitdiff format");
6967         }
6968
6969         # non-textual hash id's can be cached
6970         my $expires;
6971         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6972                 $expires = "+1d";
6973         }
6974
6975         # write commit message
6976         if ($format eq 'html') {
6977                 my $refs = git_get_references();
6978                 my $ref = format_ref_marker($refs, $co{'id'});
6979
6980                 git_header_html(undef, $expires);
6981                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6982                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6983                 print "<div class=\"title_text\">\n" .
6984                       "<table class=\"object_header\">\n";
6985                 git_print_authorship_rows(\%co);
6986                 print "</table>".
6987                       "</div>\n";
6988                 print "<div class=\"page_body\">\n";
6989                 if (@{$co{'comment'}} > 1) {
6990                         print "<div class=\"log\">\n";
6991                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6992                         print "</div>\n"; # class="log"
6993                 }
6994
6995         } elsif ($format eq 'plain') {
6996                 my $refs = git_get_references("tags");
6997                 my $tagname = git_get_rev_name_tags($hash);
6998                 my $filename = basename($project) . "-$hash.patch";
6999
7000                 print $cgi->header(
7001                         -type => 'text/plain',
7002                         -charset => 'utf-8',
7003                         -expires => $expires,
7004                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7005                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7006                 print "From: " . to_utf8($co{'author'}) . "\n";
7007                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7008                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7009
7010                 print "X-Git-Tag: $tagname\n" if $tagname;
7011                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7012
7013                 foreach my $line (@{$co{'comment'}}) {
7014                         print to_utf8($line) . "\n";
7015                 }
7016                 print "---\n\n";
7017         } elsif ($format eq 'patch') {
7018                 my $filename = basename($project) . "-$hash.patch";
7019
7020                 print $cgi->header(
7021                         -type => 'text/plain',
7022                         -charset => 'utf-8',
7023                         -expires => $expires,
7024                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7025         }
7026
7027         # write patch
7028         if ($format eq 'html') {
7029                 my $use_parents = !defined $hash_parent ||
7030                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7031                 git_difftree_body(\@difftree, $hash,
7032                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7033                 print "<br/>\n";
7034
7035                 git_patchset_body($fd, \@difftree, $hash,
7036                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7037                 close $fd;
7038                 print "</div>\n"; # class="page_body"
7039                 git_footer_html();
7040
7041         } elsif ($format eq 'plain') {
7042                 local $/ = undef;
7043                 print <$fd>;
7044                 close $fd
7045                         or print "Reading git-diff-tree failed\n";
7046         } elsif ($format eq 'patch') {
7047                 local $/ = undef;
7048                 print <$fd>;
7049                 close $fd
7050                         or print "Reading git-format-patch failed\n";
7051         }
7052 }
7053
7054 sub git_commitdiff_plain {
7055         git_commitdiff(-format => 'plain');
7056 }
7057
7058 # format-patch-style patches
7059 sub git_patch {
7060         git_commitdiff(-format => 'patch', -single => 1);
7061 }
7062
7063 sub git_patches {
7064         git_commitdiff(-format => 'patch');
7065 }
7066
7067 sub git_history {
7068         git_log_generic('history', \&git_history_body,
7069                         $hash_base, $hash_parent_base,
7070                         $file_name, $hash);
7071 }
7072
7073 sub git_search {
7074         gitweb_check_feature('search') or die_error(403, "Search is disabled");
7075         if (!defined $searchtext) {
7076                 die_error(400, "Text field is empty");
7077         }
7078         if (!defined $hash) {
7079                 $hash = git_get_head_hash($project);
7080         }
7081         my %co = parse_commit($hash);
7082         if (!%co) {
7083                 die_error(404, "Unknown commit object");
7084         }
7085         if (!defined $page) {
7086                 $page = 0;
7087         }
7088
7089         $searchtype ||= 'commit';
7090         if ($searchtype eq 'pickaxe') {
7091                 # pickaxe may take all resources of your box and run for several minutes
7092                 # with every query - so decide by yourself how public you make this feature
7093                 gitweb_check_feature('pickaxe')
7094                     or die_error(403, "Pickaxe is disabled");
7095         }
7096         if ($searchtype eq 'grep') {
7097                 gitweb_check_feature('grep')
7098                     or die_error(403, "Grep is disabled");
7099         }
7100
7101         git_header_html();
7102
7103         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
7104                 my $greptype;
7105                 if ($searchtype eq 'commit') {
7106                         $greptype = "--grep=";
7107                 } elsif ($searchtype eq 'author') {
7108                         $greptype = "--author=";
7109                 } elsif ($searchtype eq 'committer') {
7110                         $greptype = "--committer=";
7111                 }
7112                 $greptype .= $searchtext;
7113                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
7114                                                $greptype, '--regexp-ignore-case',
7115                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
7116
7117                 my $paging_nav = '';
7118                 if ($page > 0) {
7119                         $paging_nav .=
7120                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
7121                                                        searchtext=>$searchtext,
7122                                                        searchtype=>$searchtype)},
7123                                         "first");
7124                         $paging_nav .= " &sdot; " .
7125                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
7126                                          -accesskey => "p", -title => "Alt-p"}, "prev");
7127                 } else {
7128                         $paging_nav .= "first";
7129                         $paging_nav .= " &sdot; prev";
7130                 }
7131                 my $next_link = '';
7132                 if ($#commitlist >= 100) {
7133                         $next_link =
7134                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
7135                                          -accesskey => "n", -title => "Alt-n"}, "next");
7136                         $paging_nav .= " &sdot; $next_link";
7137                 } else {
7138                         $paging_nav .= " &sdot; next";
7139                 }
7140
7141                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
7142                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7143                 if ($page == 0 && !@commitlist) {
7144                         print "<p>No match.</p>\n";
7145                 } else {
7146                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
7147                 }
7148         }
7149
7150         if ($searchtype eq 'pickaxe') {
7151                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7152                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7153
7154                 print "<table class=\"pickaxe search\">\n";
7155                 my $alternate = 1;
7156                 local $/ = "\n";
7157                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
7158                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
7159                         ($search_use_regexp ? '--pickaxe-regex' : ());
7160                 undef %co;
7161                 my @files;
7162                 while (my $line = <$fd>) {
7163                         chomp $line;
7164                         next unless $line;
7165
7166                         my %set = parse_difftree_raw_line($line);
7167                         if (defined $set{'commit'}) {
7168                                 # finish previous commit
7169                                 if (%co) {
7170                                         print "</td>\n" .
7171                                               "<td class=\"link\">" .
7172                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7173                                               " | " .
7174                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7175                                         print "</td>\n" .
7176                                               "</tr>\n";
7177                                 }
7178
7179                                 if ($alternate) {
7180                                         print "<tr class=\"dark\">\n";
7181                                 } else {
7182                                         print "<tr class=\"light\">\n";
7183                                 }
7184                                 $alternate ^= 1;
7185                                 %co = parse_commit($set{'commit'});
7186                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
7187                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
7188                                       "<td><i>$author</i></td>\n" .
7189                                       "<td>" .
7190                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
7191                                               -class => "list subject"},
7192                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7193                         } elsif (defined $set{'to_id'}) {
7194                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7195
7196                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7197                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7198                                               -class => "list"},
7199                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7200                                       "<br/>\n";
7201                         }
7202                 }
7203                 close $fd;
7204
7205                 # finish last commit (warning: repetition!)
7206                 if (%co) {
7207                         print "</td>\n" .
7208                               "<td class=\"link\">" .
7209                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7210                               " | " .
7211                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7212                         print "</td>\n" .
7213                               "</tr>\n";
7214                 }
7215
7216                 print "</table>\n";
7217         }
7218
7219         if ($searchtype eq 'grep') {
7220                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7221                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7222
7223                 print "<table class=\"grep_search\">\n";
7224                 my $alternate = 1;
7225                 my $matches = 0;
7226                 local $/ = "\n";
7227                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7228                         $search_use_regexp ? ('-E', '-i') : '-F',
7229                         $searchtext, $co{'tree'};
7230                 my $lastfile = '';
7231                 while (my $line = <$fd>) {
7232                         chomp $line;
7233                         my ($file, $lno, $ltext, $binary);
7234                         last if ($matches++ > 1000);
7235                         if ($line =~ /^Binary file (.+) matches$/) {
7236                                 $file = $1;
7237                                 $binary = 1;
7238                         } else {
7239                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7240                         }
7241                         if ($file ne $lastfile) {
7242                                 $lastfile and print "</td></tr>\n";
7243                                 if ($alternate++) {
7244                                         print "<tr class=\"dark\">\n";
7245                                 } else {
7246                                         print "<tr class=\"light\">\n";
7247                                 }
7248                                 print "<td class=\"list\">".
7249                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7250                                                                file_name=>"$file"),
7251                                                 -class => "list"}, esc_path($file));
7252                                 print "</td><td>\n";
7253                                 $lastfile = $file;
7254                         }
7255                         if ($binary) {
7256                                 print "<div class=\"binary\">Binary file</div>\n";
7257                         } else {
7258                                 $ltext = untabify($ltext);
7259                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7260                                         $ltext = esc_html($1, -nbsp=>1);
7261                                         $ltext .= '<span class="match">';
7262                                         $ltext .= esc_html($2, -nbsp=>1);
7263                                         $ltext .= '</span>';
7264                                         $ltext .= esc_html($3, -nbsp=>1);
7265                                 } else {
7266                                         $ltext = esc_html($ltext, -nbsp=>1);
7267                                 }
7268                                 print "<div class=\"pre\">" .
7269                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7270                                                                file_name=>"$file").'#l'.$lno,
7271                                                 -class => "linenr"}, sprintf('%4i', $lno))
7272                                         . ' ' .  $ltext . "</div>\n";
7273                         }
7274                 }
7275                 if ($lastfile) {
7276                         print "</td></tr>\n";
7277                         if ($matches > 1000) {
7278                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7279                         }
7280                 } else {
7281                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7282                 }
7283                 close $fd;
7284
7285                 print "</table>\n";
7286         }
7287         git_footer_html();
7288 }
7289
7290 sub git_search_help {
7291         git_header_html();
7292         git_print_page_nav('','', $hash,$hash,$hash);
7293         print <<EOT;
7294 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7295 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7296 the pattern entered is recognized as the POSIX extended
7297 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7298 insensitive).</p>
7299 <dl>
7300 <dt><b>commit</b></dt>
7301 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7302 EOT
7303         my $have_grep = gitweb_check_feature('grep');
7304         if ($have_grep) {
7305                 print <<EOT;
7306 <dt><b>grep</b></dt>
7307 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7308     a different one) are searched for the given pattern. On large trees, this search can take
7309 a while and put some strain on the server, so please use it with some consideration. Note that
7310 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7311 case-sensitive.</dd>
7312 EOT
7313         }
7314         print <<EOT;
7315 <dt><b>author</b></dt>
7316 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7317 <dt><b>committer</b></dt>
7318 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7319 EOT
7320         my $have_pickaxe = gitweb_check_feature('pickaxe');
7321         if ($have_pickaxe) {
7322                 print <<EOT;
7323 <dt><b>pickaxe</b></dt>
7324 <dd>All commits that caused the string to appear or disappear from any file (changes that
7325 added, removed or "modified" the string) will be listed. This search can take a while and
7326 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7327 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7328 EOT
7329         }
7330         print "</dl>\n";
7331         git_footer_html();
7332 }
7333
7334 sub git_shortlog {
7335         git_log_generic('shortlog', \&git_shortlog_body,
7336                         $hash, $hash_parent);
7337 }
7338
7339 ## ......................................................................
7340 ## feeds (RSS, Atom; OPML)
7341
7342 sub git_feed {
7343         my $format = shift || 'atom';
7344         my $have_blame = gitweb_check_feature('blame');
7345
7346         # Atom: http://www.atomenabled.org/developers/syndication/
7347         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7348         if ($format ne 'rss' && $format ne 'atom') {
7349                 die_error(400, "Unknown web feed format");
7350         }
7351
7352         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7353         my $head = $hash || 'HEAD';
7354         my @commitlist = parse_commits($head, 150, 0, $file_name);
7355
7356         my %latest_commit;
7357         my %latest_date;
7358         my $content_type = "application/$format+xml";
7359         if (defined $cgi->http('HTTP_ACCEPT') &&
7360                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7361                 # browser (feed reader) prefers text/xml
7362                 $content_type = 'text/xml';
7363         }
7364         if (defined($commitlist[0])) {
7365                 %latest_commit = %{$commitlist[0]};
7366                 my $latest_epoch = $latest_commit{'committer_epoch'};
7367                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7368                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7369                 if (defined $if_modified) {
7370                         my $since;
7371                         if (eval { require HTTP::Date; 1; }) {
7372                                 $since = HTTP::Date::str2time($if_modified);
7373                         } elsif (eval { require Time::ParseDate; 1; }) {
7374                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7375                         }
7376                         if (defined $since && $latest_epoch <= $since) {
7377                                 print $cgi->header(
7378                                         -type => $content_type,
7379                                         -charset => 'utf-8',
7380                                         -last_modified => $latest_date{'rfc2822'},
7381                                         -status => '304 Not Modified');
7382                                 return;
7383                         }
7384                 }
7385                 print $cgi->header(
7386                         -type => $content_type,
7387                         -charset => 'utf-8',
7388                         -last_modified => $latest_date{'rfc2822'});
7389         } else {
7390                 print $cgi->header(
7391                         -type => $content_type,
7392                         -charset => 'utf-8');
7393         }
7394
7395         # Optimization: skip generating the body if client asks only
7396         # for Last-Modified date.
7397         return if ($cgi->request_method() eq 'HEAD');
7398
7399         # header variables
7400         my $title = "$site_name - $project/$action";
7401         my $feed_type = 'log';
7402         if (defined $hash) {
7403                 $title .= " - '$hash'";
7404                 $feed_type = 'branch log';
7405                 if (defined $file_name) {
7406                         $title .= " :: $file_name";
7407                         $feed_type = 'history';
7408                 }
7409         } elsif (defined $file_name) {
7410                 $title .= " - $file_name";
7411                 $feed_type = 'history';
7412         }
7413         $title .= " $feed_type";
7414         my $descr = git_get_project_description($project);
7415         if (defined $descr) {
7416                 $descr = esc_html($descr);
7417         } else {
7418                 $descr = "$project " .
7419                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7420                          " feed";
7421         }
7422         my $owner = git_get_project_owner($project);
7423         $owner = esc_html($owner);
7424
7425         #header
7426         my $alt_url;
7427         if (defined $file_name) {
7428                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7429         } elsif (defined $hash) {
7430                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7431         } else {
7432                 $alt_url = href(-full=>1, action=>"summary");
7433         }
7434         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7435         if ($format eq 'rss') {
7436                 print <<XML;
7437 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7438 <channel>
7439 XML
7440                 print "<title>$title</title>\n" .
7441                       "<link>$alt_url</link>\n" .
7442                       "<description>$descr</description>\n" .
7443                       "<language>en</language>\n" .
7444                       # project owner is responsible for 'editorial' content
7445                       "<managingEditor>$owner</managingEditor>\n";
7446                 if (defined $logo || defined $favicon) {
7447                         # prefer the logo to the favicon, since RSS
7448                         # doesn't allow both
7449                         my $img = esc_url($logo || $favicon);
7450                         print "<image>\n" .
7451                               "<url>$img</url>\n" .
7452                               "<title>$title</title>\n" .
7453                               "<link>$alt_url</link>\n" .
7454                               "</image>\n";
7455                 }
7456                 if (%latest_date) {
7457                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7458                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7459                 }
7460                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7461         } elsif ($format eq 'atom') {
7462                 print <<XML;
7463 <feed xmlns="http://www.w3.org/2005/Atom">
7464 XML
7465                 print "<title>$title</title>\n" .
7466                       "<subtitle>$descr</subtitle>\n" .
7467                       '<link rel="alternate" type="text/html" href="' .
7468                       $alt_url . '" />' . "\n" .
7469                       '<link rel="self" type="' . $content_type . '" href="' .
7470                       $cgi->self_url() . '" />' . "\n" .
7471                       "<id>" . href(-full=>1) . "</id>\n" .
7472                       # use project owner for feed author
7473                       "<author><name>$owner</name></author>\n";
7474                 if (defined $favicon) {
7475                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7476                 }
7477                 if (defined $logo) {
7478                         # not twice as wide as tall: 72 x 27 pixels
7479                         print "<logo>" . esc_url($logo) . "</logo>\n";
7480                 }
7481                 if (! %latest_date) {
7482                         # dummy date to keep the feed valid until commits trickle in:
7483                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7484                 } else {
7485                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7486                 }
7487                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7488         }
7489
7490         # contents
7491         for (my $i = 0; $i <= $#commitlist; $i++) {
7492                 my %co = %{$commitlist[$i]};
7493                 my $commit = $co{'id'};
7494                 # we read 150, we always show 30 and the ones more recent than 48 hours
7495                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7496                         last;
7497                 }
7498                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7499
7500                 # get list of changed files
7501                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7502                         $co{'parent'} || "--root",
7503                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7504                         or next;
7505                 my @difftree = map { chomp; $_ } <$fd>;
7506                 close $fd
7507                         or next;
7508
7509                 # print element (entry, item)
7510                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7511                 if ($format eq 'rss') {
7512                         print "<item>\n" .
7513                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7514                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7515                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7516                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7517                               "<link>$co_url</link>\n" .
7518                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7519                               "<content:encoded>" .
7520                               "<![CDATA[\n";
7521                 } elsif ($format eq 'atom') {
7522                         print "<entry>\n" .
7523                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7524                               "<updated>$cd{'iso-8601'}</updated>\n" .
7525                               "<author>\n" .
7526                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7527                         if ($co{'author_email'}) {
7528                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7529                         }
7530                         print "</author>\n" .
7531                               # use committer for contributor
7532                               "<contributor>\n" .
7533                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7534                         if ($co{'committer_email'}) {
7535                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7536                         }
7537                         print "</contributor>\n" .
7538                               "<published>$cd{'iso-8601'}</published>\n" .
7539                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7540                               "<id>$co_url</id>\n" .
7541                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7542                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7543                 }
7544                 my $comment = $co{'comment'};
7545                 print "<pre>\n";
7546                 foreach my $line (@$comment) {
7547                         $line = esc_html($line);
7548                         print "$line\n";
7549                 }
7550                 print "</pre><ul>\n";
7551                 foreach my $difftree_line (@difftree) {
7552                         my %difftree = parse_difftree_raw_line($difftree_line);
7553                         next if !$difftree{'from_id'};
7554
7555                         my $file = $difftree{'file'} || $difftree{'to_file'};
7556
7557                         print "<li>" .
7558                               "[" .
7559                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7560                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7561                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7562                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7563                                       -title => "diff"}, 'D');
7564                         if ($have_blame) {
7565                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7566                                                              file_name=>$file, hash_base=>$commit),
7567                                               -title => "blame"}, 'B');
7568                         }
7569                         # if this is not a feed of a file history
7570                         if (!defined $file_name || $file_name ne $file) {
7571                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7572                                                              file_name=>$file, hash=>$commit),
7573                                               -title => "history"}, 'H');
7574                         }
7575                         $file = esc_path($file);
7576                         print "] ".
7577                               "$file</li>\n";
7578                 }
7579                 if ($format eq 'rss') {
7580                         print "</ul>]]>\n" .
7581                               "</content:encoded>\n" .
7582                               "</item>\n";
7583                 } elsif ($format eq 'atom') {
7584                         print "</ul>\n</div>\n" .
7585                               "</content>\n" .
7586                               "</entry>\n";
7587                 }
7588         }
7589
7590         # end of feed
7591         if ($format eq 'rss') {
7592                 print "</channel>\n</rss>\n";
7593         } elsif ($format eq 'atom') {
7594                 print "</feed>\n";
7595         }
7596 }
7597
7598 sub git_rss {
7599         git_feed('rss');
7600 }
7601
7602 sub git_atom {
7603         git_feed('atom');
7604 }
7605
7606 sub git_opml {
7607         my @list = git_get_projects_list();
7608         if (!@list) {
7609                 die_error(404, "No projects found");
7610         }
7611
7612         print $cgi->header(
7613                 -type => 'text/xml',
7614                 -charset => 'utf-8',
7615                 -content_disposition => 'inline; filename="opml.xml"');
7616
7617         print <<XML;
7618 <?xml version="1.0" encoding="utf-8"?>
7619 <opml version="1.0">
7620 <head>
7621   <title>$site_name OPML Export</title>
7622 </head>
7623 <body>
7624 <outline text="git RSS feeds">
7625 XML
7626
7627         foreach my $pr (@list) {
7628                 my %proj = %$pr;
7629                 my $head = git_get_head_hash($proj{'path'});
7630                 if (!defined $head) {
7631                         next;
7632                 }
7633                 $git_dir = "$projectroot/$proj{'path'}";
7634                 my %co = parse_commit($head);
7635                 if (!%co) {
7636                         next;
7637                 }
7638
7639                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7640                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7641                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7642                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7643         }
7644         print <<XML;
7645 </outline>
7646 </body>
7647 </opml>
7648 XML
7649 }