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 $path_info = decode_utf8($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 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         project_filter => "pf",
 764         # this must be last entry (for manipulation from JavaScript)
 765         javascript => "js"
 766 );
 767 our %cgi_param_mapping = @cgi_param_mapping;
 768
 769 # we will also need to know the possible actions, for validation
 770 our %actions = (
 771         "blame" => \&git_blame,
 772         "blame_incremental" => \&git_blame_incremental,
 773         "blame_data" => \&git_blame_data,
 774         "blobdiff" => \&git_blobdiff,
 775         "blobdiff_plain" => \&git_blobdiff_plain,
 776         "blob" => \&git_blob,
 777         "blob_plain" => \&git_blob_plain,
 778         "commitdiff" => \&git_commitdiff,
 779         "commitdiff_plain" => \&git_commitdiff_plain,
 780         "commit" => \&git_commit,
 781         "forks" => \&git_forks,
 782         "heads" => \&git_heads,
 783         "history" => \&git_history,
 784         "log" => \&git_log,
 785         "patch" => \&git_patch,
 786         "patches" => \&git_patches,
 787         "remotes" => \&git_remotes,
 788         "rss" => \&git_rss,
 789         "atom" => \&git_atom,
 790         "search" => \&git_search,
 791         "search_help" => \&git_search_help,
 792         "shortlog" => \&git_shortlog,
 793         "summary" => \&git_summary,
 794         "tag" => \&git_tag,
 795         "tags" => \&git_tags,
 796         "tree" => \&git_tree,
 797         "snapshot" => \&git_snapshot,
 798         "object" => \&git_object,
 799         # those below don't need $project
 800         "opml" => \&git_opml,
 801         "project_list" => \&git_project_list,
 802         "project_index" => \&git_project_index,
 803 );
 804
 805 # finally, we have the hash of allowed extra_options for the commands that
 806 # allow them
 807 our %allowed_options = (
 808         "--no-merges" => [ qw(rss atom log shortlog history) ],
 809 );
 810
 811 # fill %input_params with the CGI parameters. All values except for 'opt'
 812 # should be single values, but opt can be an array. We should probably
 813 # build an array of parameters that can be multi-valued, but since for the time
 814 # being it's only this one, we just single it out
 815 sub evaluate_query_params {
 816         our $cgi;
 817
 818         while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                 if ($symbol eq 'opt') {
 820                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 823                 }
 824         }
 825 }
 826
 827 # now read PATH_INFO and update the parameter list for missing parameters
 828 sub evaluate_path_info {
 829         return if defined $input_params{'project'};
 830         return if !$path_info;
 831         $path_info =~ s,^/+,,;
 832         return if !$path_info;
 833
 834         # find which part of PATH_INFO is project
 835         my $project = $path_info;
 836         $project =~ s,/+$,,;
 837         while ($project && !check_head_link("$projectroot/$project")) {
 838                 $project =~ s,/*[^/]*$,,;
 839         }
 840         return unless $project;
 841         $input_params{'project'} = $project;
 842
 843         # do not change any parameters if an action is given using the query string
 844         return if $input_params{'action'};
 845         $path_info =~ s,^\Q$project\E/*,,;
 846
 847         # next, check if we have an action
 848         my $action = $path_info;
 849         $action =~ s,/.*$,,;
 850         if (exists $actions{$action}) {
 851                 $path_info =~ s,^$action/*,,;
 852                 $input_params{'action'} = $action;
 853         }
 854
 855         # list of actions that want hash_base instead of hash, but can have no
 856         # pathname (f) parameter
 857         my @wants_base = (
 858                 'tree',
 859                 'history',
 860         );
 861
 862         # we want to catch, among others
 863         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864         my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867         # first, analyze the 'current' part
 868         if (defined $pathname) {
 869                 # we got "branch:filename" or "branch:dir/"
 870                 # we could use git_get_type(branch:pathname), but:
 871                 # - it needs $git_dir
 872                 # - it does a git() call
 873                 # - the convention of terminating directories with a slash
 874                 #   makes it superfluous
 875                 # - embedding the action in the PATH_INFO would make it even
 876                 #   more superfluous
 877                 $pathname =~ s,^/+,,;
 878                 if (!$pathname || substr($pathname, -1) eq "/") {
 879                         $input_params{'action'} ||= "tree";
 880                         $pathname =~ s,/$,,;
 881                 } else {
 882                         # the default action depends on whether we had parent info
 883                         # or not
 884                         if ($parentrefname) {
 885                                 $input_params{'action'} ||= "blobdiff_plain";
 886                         } else {
 887                                 $input_params{'action'} ||= "blob_plain";
 888                         }
 889                 }
 890                 $input_params{'hash_base'} ||= $refname;
 891                 $input_params{'file_name'} ||= $pathname;
 892         } elsif (defined $refname) {
 893                 # we got "branch". In this case we have to choose if we have to
 894                 # set hash or hash_base.
 895                 #
 896                 # Most of the actions without a pathname only want hash to be
 897                 # set, except for the ones specified in @wants_base that want
 898                 # hash_base instead. It should also be noted that hand-crafted
 899                 # links having 'history' as an action and no pathname or hash
 900                 # set will fail, but that happens regardless of PATH_INFO.
 901                 if (defined $parentrefname) {
 902                         # if there is parent let the default be 'shortlog' action
 903                         # (for http://git.example.com/repo.git/A..B links); if there
 904                         # is no parent, dispatch will detect type of object and set
 905                         # action appropriately if required (if action is not set)
 906                         $input_params{'action'} ||= "shortlog";
 907                 }
 908                 if ($input_params{'action'} &&
 909                     grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_base'} ||= $refname;
 911                 } else {
 912                         $input_params{'hash'} ||= $refname;
 913                 }
 914         }
 915
 916         # next, handle the 'parent' part, if present
 917         if (defined $parentrefname) {
 918                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                 # someproject/blobdiff/oldrev..newrev:/filename
 920                 if ($parentpathname) {
 921                         $parentpathname =~ s,^/+,,;
 922                         $parentpathname =~ s,/$,,;
 923                         $input_params{'file_parent'} ||= $parentpathname;
 924                 } else {
 925                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                 }
 927                 # we assume that hash_parent_base is wanted if a path was specified,
 928                 # or if the action wants hash_base instead of hash
 929                 if (defined $input_params{'file_parent'} ||
 930                         grep { $_ eq $input_params{'action'} } @wants_base) {
 931                         $input_params{'hash_parent_base'} ||= $parentrefname;
 932                 } else {
 933                         $input_params{'hash_parent'} ||= $parentrefname;
 934                 }
 935         }
 936
 937         # for the snapshot action, we allow URLs in the form
 938         # $project/snapshot/$hash.ext
 939         # where .ext determines the snapshot and gets removed from the
 940         # passed $refname to provide the $hash.
 941         #
 942         # To be able to tell that $refname includes the format extension, we
 943         # require the following two conditions to be satisfied:
 944         # - the hash input parameter MUST have been set from the $refname part
 945         #   of the URL (i.e. they must be equal)
 946         # - the snapshot format MUST NOT have been defined already (e.g. from
 947         #   CGI parameter sf)
 948         # It's also useless to try any matching unless $refname has a dot,
 949         # so we check for that too
 950         if (defined $input_params{'action'} &&
 951                 $input_params{'action'} eq 'snapshot' &&
 952                 defined $refname && index($refname, '.') != -1 &&
 953                 $refname eq $input_params{'hash'} &&
 954                 !defined $input_params{'snapshot_format'}) {
 955                 # We loop over the known snapshot formats, checking for
 956                 # extensions. Allowed extensions are both the defined suffix
 957                 # (which includes the initial dot already) and the snapshot
 958                 # format key itself, with a prepended dot
 959                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                         my $hash = $refname;
 961                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                 next;
 963                         }
 964                         my $sfx = $1;
 965                         # a valid suffix was found, so set the snapshot format
 966                         # and reset the hash parameter
 967                         $input_params{'snapshot_format'} = $fmt;
 968                         $input_params{'hash'} = $hash;
 969                         # we also set the format suffix to the one requested
 970                         # in the URL: this way a request for e.g. .tgz returns
 971                         # a .tgz instead of a .tar.gz
 972                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                         last;
 974                 }
 975         }
 976 }
 977
 978 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980      $searchtext, $search_regexp, $project_filter);
 981 sub evaluate_and_validate_params {
 982         our $action = $input_params{'action'};
 983         if (defined $action) {
 984                 if (!validate_action($action)) {
 985                         die_error(400, "Invalid action parameter");
 986                 }
 987         }
 988
 989         # parameters which are pathnames
 990         our $project = $input_params{'project'};
 991         if (defined $project) {
 992                 if (!validate_project($project)) {
 993                         undef $project;
 994                         die_error(404, "No such project");
 995                 }
 996         }
 997
 998         our $project_filter = $input_params{'project_filter'};
 999         if (defined $project_filter) {
1000                 if (!validate_pathname($project_filter)) {
1001                         die_error(404, "Invalid project_filter parameter");
1002                 }
1003         }
1004
1005         our $file_name = $input_params{'file_name'};
1006         if (defined $file_name) {
1007                 if (!validate_pathname($file_name)) {
1008                         die_error(400, "Invalid file parameter");
1009                 }
1010         }
1011
1012         our $file_parent = $input_params{'file_parent'};
1013         if (defined $file_parent) {
1014                 if (!validate_pathname($file_parent)) {
1015                         die_error(400, "Invalid file parent parameter");
1016                 }
1017         }
1018
1019         # parameters which are refnames
1020         our $hash = $input_params{'hash'};
1021         if (defined $hash) {
1022                 if (!validate_refname($hash)) {
1023                         die_error(400, "Invalid hash parameter");
1024                 }
1025         }
1026
1027         our $hash_parent = $input_params{'hash_parent'};
1028         if (defined $hash_parent) {
1029                 if (!validate_refname($hash_parent)) {
1030                         die_error(400, "Invalid hash parent parameter");
1031                 }
1032         }
1033
1034         our $hash_base = $input_params{'hash_base'};
1035         if (defined $hash_base) {
1036                 if (!validate_refname($hash_base)) {
1037                         die_error(400, "Invalid hash base parameter");
1038                 }
1039         }
1040
1041         our @extra_options = @{$input_params{'extra_options'}};
1042         # @extra_options is always defined, since it can only be (currently) set from
1043         # CGI, and $cgi->param() returns the empty array in array context if the param
1044         # is not set
1045         foreach my $opt (@extra_options) {
1046                 if (not exists $allowed_options{$opt}) {
1047                         die_error(400, "Invalid option parameter");
1048                 }
1049                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1050                         die_error(400, "Invalid option parameter for this action");
1051                 }
1052         }
1053
1054         our $hash_parent_base = $input_params{'hash_parent_base'};
1055         if (defined $hash_parent_base) {
1056                 if (!validate_refname($hash_parent_base)) {
1057                         die_error(400, "Invalid hash parent base parameter");
1058                 }
1059         }
1060
1061         # other parameters
1062         our $page = $input_params{'page'};
1063         if (defined $page) {
1064                 if ($page =~ m/[^0-9]/) {
1065                         die_error(400, "Invalid page parameter");
1066                 }
1067         }
1068
1069         our $searchtype = $input_params{'searchtype'};
1070         if (defined $searchtype) {
1071                 if ($searchtype =~ m/[^a-z]/) {
1072                         die_error(400, "Invalid searchtype parameter");
1073                 }
1074         }
1075
1076         our $search_use_regexp = $input_params{'search_use_regexp'};
1077
1078         our $searchtext = $input_params{'searchtext'};
1079         our $search_regexp;
1080         if (defined $searchtext) {
1081                 if (length($searchtext) < 2) {
1082                         die_error(403, "At least two characters are required for search parameter");
1083                 }
1084                 if ($search_use_regexp) {
1085                         $search_regexp = $searchtext;
1086                         if (!eval { qr/$search_regexp/; 1; }) {
1087                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1088                                 die_error(400, "Invalid search regexp '$search_regexp'",
1089                                           esc_html($error));
1090                         }
1091                 } else {
1092                         $search_regexp = quotemeta $searchtext;
1093                 }
1094         }
1095 }
1096
1097 # path to the current git repository
1098 our $git_dir;
1099 sub evaluate_git_dir {
1100         our $git_dir = "$projectroot/$project" if $project;
1101 }
1102
1103 our (@snapshot_fmts, $git_avatar);
1104 sub configure_gitweb_features {
1105         # list of supported snapshot formats
1106         our @snapshot_fmts = gitweb_get_feature('snapshot');
1107         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1108
1109         # check that the avatar feature is set to a known provider name,
1110         # and for each provider check if the dependencies are satisfied.
1111         # if the provider name is invalid or the dependencies are not met,
1112         # reset $git_avatar to the empty string.
1113         our ($git_avatar) = gitweb_get_feature('avatar');
1114         if ($git_avatar eq 'gravatar') {
1115                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1116         } elsif ($git_avatar eq 'picon') {
1117                 # no dependencies
1118         } else {
1119                 $git_avatar = '';
1120         }
1121 }
1122
1123 # custom error handler: 'die <message>' is Internal Server Error
1124 sub handle_errors_html {
1125         my $msg = shift; # it is already HTML escaped
1126
1127         # to avoid infinite loop where error occurs in die_error,
1128         # change handler to default handler, disabling handle_errors_html
1129         set_message("Error occured when inside die_error:\n$msg");
1130
1131         # you cannot jump out of die_error when called as error handler;
1132         # the subroutine set via CGI::Carp::set_message is called _after_
1133         # HTTP headers are already written, so it cannot write them itself
1134         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1135 }
1136 set_message(\&handle_errors_html);
1137
1138 # dispatch
1139 sub dispatch {
1140         if (!defined $action) {
1141                 if (defined $hash) {
1142                         $action = git_get_type($hash);
1143                         $action or die_error(404, "Object does not exist");
1144                 } elsif (defined $hash_base && defined $file_name) {
1145                         $action = git_get_type("$hash_base:$file_name");
1146                         $action or die_error(404, "File or directory does not exist");
1147                 } elsif (defined $project) {
1148                         $action = 'summary';
1149                 } else {
1150                         $action = 'project_list';
1151                 }
1152         }
1153         if (!defined($actions{$action})) {
1154                 die_error(400, "Unknown action");
1155         }
1156         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1157             !$project) {
1158                 die_error(400, "Project needed");
1159         }
1160         $actions{$action}->();
1161 }
1162
1163 sub reset_timer {
1164         our $t0 = [ gettimeofday() ]
1165                 if defined $t0;
1166         our $number_of_git_cmds = 0;
1167 }
1168
1169 our $first_request = 1;
1170 sub run_request {
1171         reset_timer();
1172
1173         evaluate_uri();
1174         if ($first_request) {
1175                 evaluate_gitweb_config();
1176                 evaluate_git_version();
1177         }
1178         if ($per_request_config) {
1179                 if (ref($per_request_config) eq 'CODE') {
1180                         $per_request_config->();
1181                 } elsif (!$first_request) {
1182                         evaluate_gitweb_config();
1183                 }
1184         }
1185         check_loadavg();
1186
1187         # $projectroot and $projects_list might be set in gitweb config file
1188         $projects_list ||= $projectroot;
1189
1190         evaluate_query_params();
1191         evaluate_path_info();
1192         evaluate_and_validate_params();
1193         evaluate_git_dir();
1194
1195         configure_gitweb_features();
1196
1197         dispatch();
1198 }
1199
1200 our $is_last_request = sub { 1 };
1201 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1202 our $CGI = 'CGI';
1203 our $cgi;
1204 sub configure_as_fcgi {
1205         require CGI::Fast;
1206         our $CGI = 'CGI::Fast';
1207
1208         my $request_number = 0;
1209         # let each child service 100 requests
1210         our $is_last_request = sub { ++$request_number > 100 };
1211 }
1212 sub evaluate_argv {
1213         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1214         configure_as_fcgi()
1215                 if $script_name =~ /\.fcgi$/;
1216
1217         return unless (@ARGV);
1218
1219         require Getopt::Long;
1220         Getopt::Long::GetOptions(
1221                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1222                 'nproc|n=i' => sub {
1223                         my ($arg, $val) = @_;
1224                         return unless eval { require FCGI::ProcManager; 1; };
1225                         my $proc_manager = FCGI::ProcManager->new({
1226                                 n_processes => $val,
1227                         });
1228                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1229                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1230                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1231                 },
1232         );
1233 }
1234
1235 sub run {
1236         evaluate_argv();
1237
1238         $first_request = 1;
1239         $pre_listen_hook->()
1240                 if $pre_listen_hook;
1241
1242  REQUEST:
1243         while ($cgi = $CGI->new()) {
1244                 $pre_dispatch_hook->()
1245                         if $pre_dispatch_hook;
1246
1247                 run_request();
1248
1249                 $post_dispatch_hook->()
1250                         if $post_dispatch_hook;
1251                 $first_request = 0;
1252
1253                 last REQUEST if ($is_last_request->());
1254         }
1255
1256  DONE_GITWEB:
1257         1;
1258 }
1259
1260 run();
1261
1262 if (defined caller) {
1263         # wrapped in a subroutine processing requests,
1264         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1265         return;
1266 } else {
1267         # pure CGI script, serving single request
1268         exit;
1269 }
1270
1271 ## ======================================================================
1272 ## action links
1273
1274 # possible values of extra options
1275 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1276 # -replay => 1      - start from a current view (replay with modifications)
1277 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1278 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1279 sub href {
1280         my %params = @_;
1281         # default is to use -absolute url() i.e. $my_uri
1282         my $href = $params{-full} ? $my_url : $my_uri;
1283
1284         # implicit -replay, must be first of implicit params
1285         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1286
1287         $params{'project'} = $project unless exists $params{'project'};
1288
1289         if ($params{-replay}) {
1290                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1291                         if (!exists $params{$name}) {
1292                                 $params{$name} = $input_params{$name};
1293                         }
1294                 }
1295         }
1296
1297         my $use_pathinfo = gitweb_check_feature('pathinfo');
1298         if (defined $params{'project'} &&
1299             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1300                 # try to put as many parameters as possible in PATH_INFO:
1301                 #   - project name
1302                 #   - action
1303                 #   - hash_parent or hash_parent_base:/file_parent
1304                 #   - hash or hash_base:/filename
1305                 #   - the snapshot_format as an appropriate suffix
1306
1307                 # When the script is the root DirectoryIndex for the domain,
1308                 # $href here would be something like http://gitweb.example.com/
1309                 # Thus, we strip any trailing / from $href, to spare us double
1310                 # slashes in the final URL
1311                 $href =~ s,/$,,;
1312
1313                 # Then add the project name, if present
1314                 $href .= "/".esc_path_info($params{'project'});
1315                 delete $params{'project'};
1316
1317                 # since we destructively absorb parameters, we keep this
1318                 # boolean that remembers if we're handling a snapshot
1319                 my $is_snapshot = $params{'action'} eq 'snapshot';
1320
1321                 # Summary just uses the project path URL, any other action is
1322                 # added to the URL
1323                 if (defined $params{'action'}) {
1324                         $href .= "/".esc_path_info($params{'action'})
1325                                 unless $params{'action'} eq 'summary';
1326                         delete $params{'action'};
1327                 }
1328
1329                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1330                 # stripping nonexistent or useless pieces
1331                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1332                         || $params{'hash_parent'} || $params{'hash'});
1333                 if (defined $params{'hash_base'}) {
1334                         if (defined $params{'hash_parent_base'}) {
1335                                 $href .= esc_path_info($params{'hash_parent_base'});
1336                                 # skip the file_parent if it's the same as the file_name
1337                                 if (defined $params{'file_parent'}) {
1338                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1339                                                 delete $params{'file_parent'};
1340                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1341                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1342                                                 delete $params{'file_parent'};
1343                                         }
1344                                 }
1345                                 $href .= "..";
1346                                 delete $params{'hash_parent'};
1347                                 delete $params{'hash_parent_base'};
1348                         } elsif (defined $params{'hash_parent'}) {
1349                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1350                                 delete $params{'hash_parent'};
1351                         }
1352
1353                         $href .= esc_path_info($params{'hash_base'});
1354                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1355                                 $href .= ":/".esc_path_info($params{'file_name'});
1356                                 delete $params{'file_name'};
1357                         }
1358                         delete $params{'hash'};
1359                         delete $params{'hash_base'};
1360                 } elsif (defined $params{'hash'}) {
1361                         $href .= esc_path_info($params{'hash'});
1362                         delete $params{'hash'};
1363                 }
1364
1365                 # If the action was a snapshot, we can absorb the
1366                 # snapshot_format parameter too
1367                 if ($is_snapshot) {
1368                         my $fmt = $params{'snapshot_format'};
1369                         # snapshot_format should always be defined when href()
1370                         # is called, but just in case some code forgets, we
1371                         # fall back to the default
1372                         $fmt ||= $snapshot_fmts[0];
1373                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1374                         delete $params{'snapshot_format'};
1375                 }
1376         }
1377
1378         # now encode the parameters explicitly
1379         my @result = ();
1380         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1381                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1382                 if (defined $params{$name}) {
1383                         if (ref($params{$name}) eq "ARRAY") {
1384                                 foreach my $par (@{$params{$name}}) {
1385                                         push @result, $symbol . "=" . esc_param($par);
1386                                 }
1387                         } else {
1388                                 push @result, $symbol . "=" . esc_param($params{$name});
1389                         }
1390                 }
1391         }
1392         $href .= "?" . join(';', @result) if scalar @result;
1393
1394         # final transformation: trailing spaces must be escaped (URI-encoded)
1395         $href =~ s/(\s+)$/CGI::escape($1)/e;
1396
1397         if ($params{-anchor}) {
1398                 $href .= "#".esc_param($params{-anchor});
1399         }
1400
1401         return $href;
1402 }
1403
1404
1405 ## ======================================================================
1406 ## validation, quoting/unquoting and escaping
1407
1408 sub validate_action {
1409         my $input = shift || return undef;
1410         return undef unless exists $actions{$input};
1411         return $input;
1412 }
1413
1414 sub validate_project {
1415         my $input = shift || return undef;
1416         if (!validate_pathname($input) ||
1417                 !(-d "$projectroot/$input") ||
1418                 !check_export_ok("$projectroot/$input") ||
1419                 ($strict_export && !project_in_list($input))) {
1420                 return undef;
1421         } else {
1422                 return $input;
1423         }
1424 }
1425
1426 sub validate_pathname {
1427         my $input = shift || return undef;
1428
1429         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1430         # at the beginning, at the end, and between slashes.
1431         # also this catches doubled slashes
1432         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1433                 return undef;
1434         }
1435         # no null characters
1436         if ($input =~ m!\0!) {
1437                 return undef;
1438         }
1439         return $input;
1440 }
1441
1442 sub validate_refname {
1443         my $input = shift || return undef;
1444
1445         # textual hashes are O.K.
1446         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1447                 return $input;
1448         }
1449         # it must be correct pathname
1450         $input = validate_pathname($input)
1451                 or return undef;
1452         # restrictions on ref name according to git-check-ref-format
1453         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1454                 return undef;
1455         }
1456         return $input;
1457 }
1458
1459 # decode sequences of octets in utf8 into Perl's internal form,
1460 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1461 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1462 sub to_utf8 {
1463         my $str = shift;
1464         return undef unless defined $str;
1465
1466         if (utf8::is_utf8($str) || utf8::decode($str)) {
1467                 return $str;
1468         } else {
1469                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1470         }
1471 }
1472
1473 # quote unsafe chars, but keep the slash, even when it's not
1474 # correct, but quoted slashes look too horrible in bookmarks
1475 sub esc_param {
1476         my $str = shift;
1477         return undef unless defined $str;
1478         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1479         $str =~ s/ /\+/g;
1480         return $str;
1481 }
1482
1483 # the quoting rules for path_info fragment are slightly different
1484 sub esc_path_info {
1485         my $str = shift;
1486         return undef unless defined $str;
1487
1488         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1489         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1490
1491         return $str;
1492 }
1493
1494 # quote unsafe chars in whole URL, so some characters cannot be quoted
1495 sub esc_url {
1496         my $str = shift;
1497         return undef unless defined $str;
1498         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1499         $str =~ s/ /\+/g;
1500         return $str;
1501 }
1502
1503 # quote unsafe characters in HTML attributes
1504 sub esc_attr {
1505
1506         # for XHTML conformance escaping '"' to '&quot;' is not enough
1507         return esc_html(@_);
1508 }
1509
1510 # replace invalid utf8 character with SUBSTITUTION sequence
1511 sub esc_html {
1512         my $str = shift;
1513         my %opts = @_;
1514
1515         return undef unless defined $str;
1516
1517         $str = to_utf8($str);
1518         $str = $cgi->escapeHTML($str);
1519         if ($opts{'-nbsp'}) {
1520                 $str =~ s/ /&nbsp;/g;
1521         }
1522         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1523         return $str;
1524 }
1525
1526 # quote control characters and escape filename to HTML
1527 sub esc_path {
1528         my $str = shift;
1529         my %opts = @_;
1530
1531         return undef unless defined $str;
1532
1533         $str = to_utf8($str);
1534         $str = $cgi->escapeHTML($str);
1535         if ($opts{'-nbsp'}) {
1536                 $str =~ s/ /&nbsp;/g;
1537         }
1538         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1539         return $str;
1540 }
1541
1542 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1543 sub sanitize {
1544         my $str = shift;
1545
1546         return undef unless defined $str;
1547
1548         $str = to_utf8($str);
1549         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1550         return $str;
1551 }
1552
1553 # Make control characters "printable", using character escape codes (CEC)
1554 sub quot_cec {
1555         my $cntrl = shift;
1556         my %opts = @_;
1557         my %es = ( # character escape codes, aka escape sequences
1558                 "\t" => '\t',   # tab            (HT)
1559                 "\n" => '\n',   # line feed      (LF)
1560                 "\r" => '\r',   # carrige return (CR)
1561                 "\f" => '\f',   # form feed      (FF)
1562                 "\b" => '\b',   # backspace      (BS)
1563                 "\a" => '\a',   # alarm (bell)   (BEL)
1564                 "\e" => '\e',   # escape         (ESC)
1565                 "\013" => '\v', # vertical tab   (VT)
1566                 "\000" => '\0', # nul character  (NUL)
1567         );
1568         my $chr = ( (exists $es{$cntrl})
1569                     ? $es{$cntrl}
1570                     : sprintf('\%2x', ord($cntrl)) );
1571         if ($opts{-nohtml}) {
1572                 return $chr;
1573         } else {
1574                 return "<span class=\"cntrl\">$chr</span>";
1575         }
1576 }
1577
1578 # Alternatively use unicode control pictures codepoints,
1579 # Unicode "printable representation" (PR)
1580 sub quot_upr {
1581         my $cntrl = shift;
1582         my %opts = @_;
1583
1584         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1585         if ($opts{-nohtml}) {
1586                 return $chr;
1587         } else {
1588                 return "<span class=\"cntrl\">$chr</span>";
1589         }
1590 }
1591
1592 # git may return quoted and escaped filenames
1593 sub unquote {
1594         my $str = shift;
1595
1596         sub unq {
1597                 my $seq = shift;
1598                 my %es = ( # character escape codes, aka escape sequences
1599                         't' => "\t",   # tab            (HT, TAB)
1600                         'n' => "\n",   # newline        (NL)
1601                         'r' => "\r",   # return         (CR)
1602                         'f' => "\f",   # form feed      (FF)
1603                         'b' => "\b",   # backspace      (BS)
1604                         'a' => "\a",   # alarm (bell)   (BEL)
1605                         'e' => "\e",   # escape         (ESC)
1606                         'v' => "\013", # vertical tab   (VT)
1607                 );
1608
1609                 if ($seq =~ m/^[0-7]{1,3}$/) {
1610                         # octal char sequence
1611                         return chr(oct($seq));
1612                 } elsif (exists $es{$seq}) {
1613                         # C escape sequence, aka character escape code
1614                         return $es{$seq};
1615                 }
1616                 # quoted ordinary character
1617                 return $seq;
1618         }
1619
1620         if ($str =~ m/^"(.*)"$/) {
1621                 # needs unquoting
1622                 $str = $1;
1623                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1624         }
1625         return $str;
1626 }
1627
1628 # escape tabs (convert tabs to spaces)
1629 sub untabify {
1630         my $line = shift;
1631
1632         while ((my $pos = index($line, "\t")) != -1) {
1633                 if (my $count = (8 - ($pos % 8))) {
1634                         my $spaces = ' ' x $count;
1635                         $line =~ s/\t/$spaces/;
1636                 }
1637         }
1638
1639         return $line;
1640 }
1641
1642 sub project_in_list {
1643         my $project = shift;
1644         my @list = git_get_projects_list();
1645         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1646 }
1647
1648 ## ----------------------------------------------------------------------
1649 ## HTML aware string manipulation
1650
1651 # Try to chop given string on a word boundary between position
1652 # $len and $len+$add_len. If there is no word boundary there,
1653 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1654 # (marking chopped part) would be longer than given string.
1655 sub chop_str {
1656         my $str = shift;
1657         my $len = shift;
1658         my $add_len = shift || 10;
1659         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1660
1661         # Make sure perl knows it is utf8 encoded so we don't
1662         # cut in the middle of a utf8 multibyte char.
1663         $str = to_utf8($str);
1664
1665         # allow only $len chars, but don't cut a word if it would fit in $add_len
1666         # if it doesn't fit, cut it if it's still longer than the dots we would add
1667         # remove chopped character entities entirely
1668
1669         # when chopping in the middle, distribute $len into left and right part
1670         # return early if chopping wouldn't make string shorter
1671         if ($where eq 'center') {
1672                 return $str if ($len + 5 >= length($str)); # filler is length 5
1673                 $len = int($len/2);
1674         } else {
1675                 return $str if ($len + 4 >= length($str)); # filler is length 4
1676         }
1677
1678         # regexps: ending and beginning with word part up to $add_len
1679         my $endre = qr/.{$len}\w{0,$add_len}/;
1680         my $begre = qr/\w{0,$add_len}.{$len}/;
1681
1682         if ($where eq 'left') {
1683                 $str =~ m/^(.*?)($begre)$/;
1684                 my ($lead, $body) = ($1, $2);
1685                 if (length($lead) > 4) {
1686                         $lead = " ...";
1687                 }
1688                 return "$lead$body";
1689
1690         } elsif ($where eq 'center') {
1691                 $str =~ m/^($endre)(.*)$/;
1692                 my ($left, $str)  = ($1, $2);
1693                 $str =~ m/^(.*?)($begre)$/;
1694                 my ($mid, $right) = ($1, $2);
1695                 if (length($mid) > 5) {
1696                         $mid = " ... ";
1697                 }
1698                 return "$left$mid$right";
1699
1700         } else {
1701                 $str =~ m/^($endre)(.*)$/;
1702                 my $body = $1;
1703                 my $tail = $2;
1704                 if (length($tail) > 4) {
1705                         $tail = "... ";
1706                 }
1707                 return "$body$tail";
1708         }
1709 }
1710
1711 # takes the same arguments as chop_str, but also wraps a <span> around the
1712 # result with a title attribute if it does get chopped. Additionally, the
1713 # string is HTML-escaped.
1714 sub chop_and_escape_str {
1715         my ($str) = @_;
1716
1717         my $chopped = chop_str(@_);
1718         $str = to_utf8($str);
1719         if ($chopped eq $str) {
1720                 return esc_html($chopped);
1721         } else {
1722                 $str =~ s/[[:cntrl:]]/?/g;
1723                 return $cgi->span({-title=>$str}, esc_html($chopped));
1724         }
1725 }
1726
1727 # Highlight selected fragments of string, using given CSS class,
1728 # and escape HTML.  It is assumed that fragments do not overlap.
1729 # Regions are passed as list of pairs (array references).
1730 #
1731 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1732 # '<span class="mark">foo</span>bar'
1733 sub esc_html_hl_regions {
1734         my ($str, $css_class, @sel) = @_;
1735         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1736         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1737         return esc_html($str, %opts) unless @sel;
1738
1739         my $out = '';
1740         my $pos = 0;
1741
1742         for my $s (@sel) {
1743                 my ($begin, $end) = @$s;
1744
1745                 # Don't create empty <span> elements.
1746                 next if $end <= $begin;
1747
1748                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1749                                        %opts);
1750
1751                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1752                         if ($begin - $pos > 0);
1753                 $out .= $cgi->span({-class => $css_class}, $escaped);
1754
1755                 $pos = $end;
1756         }
1757         $out .= esc_html(substr($str, $pos), %opts)
1758                 if ($pos < length($str));
1759
1760         return $out;
1761 }
1762
1763 # return positions of beginning and end of each match
1764 sub matchpos_list {
1765         my ($str, $regexp) = @_;
1766         return unless (defined $str && defined $regexp);
1767
1768         my @matches;
1769         while ($str =~ /$regexp/g) {
1770                 push @matches, [$-[0], $+[0]];
1771         }
1772         return @matches;
1773 }
1774
1775 # highlight match (if any), and escape HTML
1776 sub esc_html_match_hl {
1777         my ($str, $regexp) = @_;
1778         return esc_html($str) unless defined $regexp;
1779
1780         my @matches = matchpos_list($str, $regexp);
1781         return esc_html($str) unless @matches;
1782
1783         return esc_html_hl_regions($str, 'match', @matches);
1784 }
1785
1786
1787 # highlight match (if any) of shortened string, and escape HTML
1788 sub esc_html_match_hl_chopped {
1789         my ($str, $chopped, $regexp) = @_;
1790         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1791
1792         my @matches = matchpos_list($str, $regexp);
1793         return esc_html($chopped) unless @matches;
1794
1795         # filter matches so that we mark chopped string
1796         my $tail = "... "; # see chop_str
1797         unless ($chopped =~ s/\Q$tail\E$//) {
1798                 $tail = '';
1799         }
1800         my $chop_len = length($chopped);
1801         my $tail_len = length($tail);
1802         my @filtered;
1803
1804         for my $m (@matches) {
1805                 if ($m->[0] > $chop_len) {
1806                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1807                         last;
1808                 } elsif ($m->[1] > $chop_len) {
1809                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1810                         last;
1811                 }
1812                 push @filtered, $m;
1813         }
1814
1815         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1816 }
1817
1818 ## ----------------------------------------------------------------------
1819 ## functions returning short strings
1820
1821 # CSS class for given age value (in seconds)
1822 sub age_class {
1823         my $age = shift;
1824
1825         if (!defined $age) {
1826                 return "noage";
1827         } elsif ($age < 60*60*2) {
1828                 return "age0";
1829         } elsif ($age < 60*60*24*2) {
1830                 return "age1";
1831         } else {
1832                 return "age2";
1833         }
1834 }
1835
1836 # convert age in seconds to "nn units ago" string
1837 sub age_string {
1838         my $age = shift;
1839         my $age_str;
1840
1841         if ($age > 60*60*24*365*2) {
1842                 $age_str = (int $age/60/60/24/365);
1843                 $age_str .= " years ago";
1844         } elsif ($age > 60*60*24*(365/12)*2) {
1845                 $age_str = int $age/60/60/24/(365/12);
1846                 $age_str .= " months ago";
1847         } elsif ($age > 60*60*24*7*2) {
1848                 $age_str = int $age/60/60/24/7;
1849                 $age_str .= " weeks ago";
1850         } elsif ($age > 60*60*24*2) {
1851                 $age_str = int $age/60/60/24;
1852                 $age_str .= " days ago";
1853         } elsif ($age > 60*60*2) {
1854                 $age_str = int $age/60/60;
1855                 $age_str .= " hours ago";
1856         } elsif ($age > 60*2) {
1857                 $age_str = int $age/60;
1858                 $age_str .= " min ago";
1859         } elsif ($age > 2) {
1860                 $age_str = int $age;
1861                 $age_str .= " sec ago";
1862         } else {
1863                 $age_str .= " right now";
1864         }
1865         return $age_str;
1866 }
1867
1868 use constant {
1869         S_IFINVALID => 0030000,
1870         S_IFGITLINK => 0160000,
1871 };
1872
1873 # submodule/subproject, a commit object reference
1874 sub S_ISGITLINK {
1875         my $mode = shift;
1876
1877         return (($mode & S_IFMT) == S_IFGITLINK)
1878 }
1879
1880 # convert file mode in octal to symbolic file mode string
1881 sub mode_str {
1882         my $mode = oct shift;
1883
1884         if (S_ISGITLINK($mode)) {
1885                 return 'm---------';
1886         } elsif (S_ISDIR($mode & S_IFMT)) {
1887                 return 'drwxr-xr-x';
1888         } elsif (S_ISLNK($mode)) {
1889                 return 'lrwxrwxrwx';
1890         } elsif (S_ISREG($mode)) {
1891                 # git cares only about the executable bit
1892                 if ($mode & S_IXUSR) {
1893                         return '-rwxr-xr-x';
1894                 } else {
1895                         return '-rw-r--r--';
1896                 };
1897         } else {
1898                 return '----------';
1899         }
1900 }
1901
1902 # convert file mode in octal to file type string
1903 sub file_type {
1904         my $mode = shift;
1905
1906         if ($mode !~ m/^[0-7]+$/) {
1907                 return $mode;
1908         } else {
1909                 $mode = oct $mode;
1910         }
1911
1912         if (S_ISGITLINK($mode)) {
1913                 return "submodule";
1914         } elsif (S_ISDIR($mode & S_IFMT)) {
1915                 return "directory";
1916         } elsif (S_ISLNK($mode)) {
1917                 return "symlink";
1918         } elsif (S_ISREG($mode)) {
1919                 return "file";
1920         } else {
1921                 return "unknown";
1922         }
1923 }
1924
1925 # convert file mode in octal to file type description string
1926 sub file_type_long {
1927         my $mode = shift;
1928
1929         if ($mode !~ m/^[0-7]+$/) {
1930                 return $mode;
1931         } else {
1932                 $mode = oct $mode;
1933         }
1934
1935         if (S_ISGITLINK($mode)) {
1936                 return "submodule";
1937         } elsif (S_ISDIR($mode & S_IFMT)) {
1938                 return "directory";
1939         } elsif (S_ISLNK($mode)) {
1940                 return "symlink";
1941         } elsif (S_ISREG($mode)) {
1942                 if ($mode & S_IXUSR) {
1943                         return "executable";
1944                 } else {
1945                         return "file";
1946                 };
1947         } else {
1948                 return "unknown";
1949         }
1950 }
1951
1952
1953 ## ----------------------------------------------------------------------
1954 ## functions returning short HTML fragments, or transforming HTML fragments
1955 ## which don't belong to other sections
1956
1957 # format line of commit message.
1958 sub format_log_line_html {
1959         my $line = shift;
1960
1961         $line = esc_html($line, -nbsp=>1);
1962         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1963                 $cgi->a({-href => href(action=>"object", hash=>$1),
1964                                         -class => "text"}, $1);
1965         }eg;
1966
1967         return $line;
1968 }
1969
1970 # format marker of refs pointing to given object
1971
1972 # the destination action is chosen based on object type and current context:
1973 # - for annotated tags, we choose the tag view unless it's the current view
1974 #   already, in which case we go to shortlog view
1975 # - for other refs, we keep the current view if we're in history, shortlog or
1976 #   log view, and select shortlog otherwise
1977 sub format_ref_marker {
1978         my ($refs, $id) = @_;
1979         my $markers = '';
1980
1981         if (defined $refs->{$id}) {
1982                 foreach my $ref (@{$refs->{$id}}) {
1983                         # this code exploits the fact that non-lightweight tags are the
1984                         # only indirect objects, and that they are the only objects for which
1985                         # we want to use tag instead of shortlog as action
1986                         my ($type, $name) = qw();
1987                         my $indirect = ($ref =~ s/\^\{\}$//);
1988                         # e.g. tags/v2.6.11 or heads/next
1989                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1990                                 $type = $1;
1991                                 $name = $2;
1992                         } else {
1993                                 $type = "ref";
1994                                 $name = $ref;
1995                         }
1996
1997                         my $class = $type;
1998                         $class .= " indirect" if $indirect;
1999
2000                         my $dest_action = "shortlog";
2001
2002                         if ($indirect) {
2003                                 $dest_action = "tag" unless $action eq "tag";
2004                         } elsif ($action =~ /^(history|(short)?log)$/) {
2005                                 $dest_action = $action;
2006                         }
2007
2008                         my $dest = "";
2009                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2010                         $dest .= $ref;
2011
2012                         my $link = $cgi->a({
2013                                 -href => href(
2014                                         action=>$dest_action,
2015                                         hash=>$dest
2016                                 )}, $name);
2017
2018                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2019                                 $link . "</span>";
2020                 }
2021         }
2022
2023         if ($markers) {
2024                 return ' <span class="refs">'. $markers . '</span>';
2025         } else {
2026                 return "";
2027         }
2028 }
2029
2030 # format, perhaps shortened and with markers, title line
2031 sub format_subject_html {
2032         my ($long, $short, $href, $extra) = @_;
2033         $extra = '' unless defined($extra);
2034
2035         if (length($short) < length($long)) {
2036                 $long =~ s/[[:cntrl:]]/?/g;
2037                 return $cgi->a({-href => $href, -class => "list subject",
2038                                 -title => to_utf8($long)},
2039                        esc_html($short)) . $extra;
2040         } else {
2041                 return $cgi->a({-href => $href, -class => "list subject"},
2042                        esc_html($long)) . $extra;
2043         }
2044 }
2045
2046 # Rather than recomputing the url for an email multiple times, we cache it
2047 # after the first hit. This gives a visible benefit in views where the avatar
2048 # for the same email is used repeatedly (e.g. shortlog).
2049 # The cache is shared by all avatar engines (currently gravatar only), which
2050 # are free to use it as preferred. Since only one avatar engine is used for any
2051 # given page, there's no risk for cache conflicts.
2052 our %avatar_cache = ();
2053
2054 # Compute the picon url for a given email, by using the picon search service over at
2055 # http://www.cs.indiana.edu/picons/search.html
2056 sub picon_url {
2057         my $email = lc shift;
2058         if (!$avatar_cache{$email}) {
2059                 my ($user, $domain) = split('@', $email);
2060                 $avatar_cache{$email} =
2061                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2062                         "$domain/$user/" .
2063                         "users+domains+unknown/up/single";
2064         }
2065         return $avatar_cache{$email};
2066 }
2067
2068 # Compute the gravatar url for a given email, if it's not in the cache already.
2069 # Gravatar stores only the part of the URL before the size, since that's the
2070 # one computationally more expensive. This also allows reuse of the cache for
2071 # different sizes (for this particular engine).
2072 sub gravatar_url {
2073         my $email = lc shift;
2074         my $size = shift;
2075         $avatar_cache{$email} ||=
2076                 "http://www.gravatar.com/avatar/" .
2077                         Digest::MD5::md5_hex($email) . "?s=";
2078         return $avatar_cache{$email} . $size;
2079 }
2080
2081 # Insert an avatar for the given $email at the given $size if the feature
2082 # is enabled.
2083 sub git_get_avatar {
2084         my ($email, %opts) = @_;
2085         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2086         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2087         $opts{-size} ||= 'default';
2088         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2089         my $url = "";
2090         if ($git_avatar eq 'gravatar') {
2091                 $url = gravatar_url($email, $size);
2092         } elsif ($git_avatar eq 'picon') {
2093                 $url = picon_url($email);
2094         }
2095         # Other providers can be added by extending the if chain, defining $url
2096         # as needed. If no variant puts something in $url, we assume avatars
2097         # are completely disabled/unavailable.
2098         if ($url) {
2099                 return $pre_white .
2100                        "<img width=\"$size\" " .
2101                             "class=\"avatar\" " .
2102                             "src=\"".esc_url($url)."\" " .
2103                             "alt=\"\" " .
2104                        "/>" . $post_white;
2105         } else {
2106                 return "";
2107         }
2108 }
2109
2110 sub format_search_author {
2111         my ($author, $searchtype, $displaytext) = @_;
2112         my $have_search = gitweb_check_feature('search');
2113
2114         if ($have_search) {
2115                 my $performed = "";
2116                 if ($searchtype eq 'author') {
2117                         $performed = "authored";
2118                 } elsif ($searchtype eq 'committer') {
2119                         $performed = "committed";
2120                 }
2121
2122                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2123                                 searchtext=>$author,
2124                                 searchtype=>$searchtype), class=>"list",
2125                                 title=>"Search for commits $performed by $author"},
2126                                 $displaytext);
2127
2128         } else {
2129                 return $displaytext;
2130         }
2131 }
2132
2133 # format the author name of the given commit with the given tag
2134 # the author name is chopped and escaped according to the other
2135 # optional parameters (see chop_str).
2136 sub format_author_html {
2137         my $tag = shift;
2138         my $co = shift;
2139         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2140         return "<$tag class=\"author\">" .
2141                format_search_author($co->{'author_name'}, "author",
2142                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2143                        $author) .
2144                "</$tag>";
2145 }
2146
2147 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2148 sub format_git_diff_header_line {
2149         my $line = shift;
2150         my $diffinfo = shift;
2151         my ($from, $to) = @_;
2152
2153         if ($diffinfo->{'nparents'}) {
2154                 # combined diff
2155                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2156                 if ($to->{'href'}) {
2157                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2158                                          esc_path($to->{'file'}));
2159                 } else { # file was deleted (no href)
2160                         $line .= esc_path($to->{'file'});
2161                 }
2162         } else {
2163                 # "ordinary" diff
2164                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2165                 if ($from->{'href'}) {
2166                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2167                                          'a/' . esc_path($from->{'file'}));
2168                 } else { # file was added (no href)
2169                         $line .= 'a/' . esc_path($from->{'file'});
2170                 }
2171                 $line .= ' ';
2172                 if ($to->{'href'}) {
2173                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2174                                          'b/' . esc_path($to->{'file'}));
2175                 } else { # file was deleted
2176                         $line .= 'b/' . esc_path($to->{'file'});
2177                 }
2178         }
2179
2180         return "<div class=\"diff header\">$line</div>\n";
2181 }
2182
2183 # format extended diff header line, before patch itself
2184 sub format_extended_diff_header_line {
2185         my $line = shift;
2186         my $diffinfo = shift;
2187         my ($from, $to) = @_;
2188
2189         # match <path>
2190         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2191                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2192                                        esc_path($from->{'file'}));
2193         }
2194         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2195                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2196                                  esc_path($to->{'file'}));
2197         }
2198         # match single <mode>
2199         if ($line =~ m/\s(\d{6})$/) {
2200                 $line .= '<span class="info"> (' .
2201                          file_type_long($1) .
2202                          ')</span>';
2203         }
2204         # match <hash>
2205         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2206                 # can match only for combined diff
2207                 $line = 'index ';
2208                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2209                         if ($from->{'href'}[$i]) {
2210                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2211                                                   -class=>"hash"},
2212                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2213                         } else {
2214                                 $line .= '0' x 7;
2215                         }
2216                         # separator
2217                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2218                 }
2219                 $line .= '..';
2220                 if ($to->{'href'}) {
2221                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2222                                          substr($diffinfo->{'to_id'},0,7));
2223                 } else {
2224                         $line .= '0' x 7;
2225                 }
2226
2227         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2228                 # can match only for ordinary diff
2229                 my ($from_link, $to_link);
2230                 if ($from->{'href'}) {
2231                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2232                                              substr($diffinfo->{'from_id'},0,7));
2233                 } else {
2234                         $from_link = '0' x 7;
2235                 }
2236                 if ($to->{'href'}) {
2237                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2238                                            substr($diffinfo->{'to_id'},0,7));
2239                 } else {
2240                         $to_link = '0' x 7;
2241                 }
2242                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2243                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2244         }
2245
2246         return $line . "<br/>\n";
2247 }
2248
2249 # format from-file/to-file diff header
2250 sub format_diff_from_to_header {
2251         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2252         my $line;
2253         my $result = '';
2254
2255         $line = $from_line;
2256         #assert($line =~ m/^---/) if DEBUG;
2257         # no extra formatting for "^--- /dev/null"
2258         if (! $diffinfo->{'nparents'}) {
2259                 # ordinary (single parent) diff
2260                 if ($line =~ m!^--- "?a/!) {
2261                         if ($from->{'href'}) {
2262                                 $line = '--- a/' .
2263                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2264                                                 esc_path($from->{'file'}));
2265                         } else {
2266                                 $line = '--- a/' .
2267                                         esc_path($from->{'file'});
2268                         }
2269                 }
2270                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2271
2272         } else {
2273                 # combined diff (merge commit)
2274                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2275                         if ($from->{'href'}[$i]) {
2276                                 $line = '--- ' .
2277                                         $cgi->a({-href=>href(action=>"blobdiff",
2278                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2279                                                              hash_parent_base=>$parents[$i],
2280                                                              file_parent=>$from->{'file'}[$i],
2281                                                              hash=>$diffinfo->{'to_id'},
2282                                                              hash_base=>$hash,
2283                                                              file_name=>$to->{'file'}),
2284                                                  -class=>"path",
2285                                                  -title=>"diff" . ($i+1)},
2286                                                 $i+1) .
2287                                         '/' .
2288                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2289                                                 esc_path($from->{'file'}[$i]));
2290                         } else {
2291                                 $line = '--- /dev/null';
2292                         }
2293                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2294                 }
2295         }
2296
2297         $line = $to_line;
2298         #assert($line =~ m/^\+\+\+/) if DEBUG;
2299         # no extra formatting for "^+++ /dev/null"
2300         if ($line =~ m!^\+\+\+ "?b/!) {
2301                 if ($to->{'href'}) {
2302                         $line = '+++ b/' .
2303                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2304                                         esc_path($to->{'file'}));
2305                 } else {
2306                         $line = '+++ b/' .
2307                                 esc_path($to->{'file'});
2308                 }
2309         }
2310         $result .= qq!<div class="diff to_file">$line</div>\n!;
2311
2312         return $result;
2313 }
2314
2315 # create note for patch simplified by combined diff
2316 sub format_diff_cc_simplified {
2317         my ($diffinfo, @parents) = @_;
2318         my $result = '';
2319
2320         $result .= "<div class=\"diff header\">" .
2321                    "diff --cc ";
2322         if (!is_deleted($diffinfo)) {
2323                 $result .= $cgi->a({-href => href(action=>"blob",
2324                                                   hash_base=>$hash,
2325                                                   hash=>$diffinfo->{'to_id'},
2326                                                   file_name=>$diffinfo->{'to_file'}),
2327                                     -class => "path"},
2328                                    esc_path($diffinfo->{'to_file'}));
2329         } else {
2330                 $result .= esc_path($diffinfo->{'to_file'});
2331         }
2332         $result .= "</div>\n" . # class="diff header"
2333                    "<div class=\"diff nodifferences\">" .
2334                    "Simple merge" .
2335                    "</div>\n"; # class="diff nodifferences"
2336
2337         return $result;
2338 }
2339
2340 sub diff_line_class {
2341         my ($line, $from, $to) = @_;
2342
2343         # ordinary diff
2344         my $num_sign = 1;
2345         # combined diff
2346         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2347                 $num_sign = scalar @{$from->{'href'}};
2348         }
2349
2350         my @diff_line_classifier = (
2351                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2352                 { regexp => qr/^\\/,               class => "incomplete"  },
2353                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2354                 # classifier for context must come before classifier add/rem,
2355                 # or we would have to use more complicated regexp, for example
2356                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2357                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2358                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2359         );
2360         for my $clsfy (@diff_line_classifier) {
2361                 return $clsfy->{'class'}
2362                         if ($line =~ $clsfy->{'regexp'});
2363         }
2364
2365         # fallback
2366         return "";
2367 }
2368
2369 # assumes that $from and $to are defined and correctly filled,
2370 # and that $line holds a line of chunk header for unified diff
2371 sub format_unidiff_chunk_header {
2372         my ($line, $from, $to) = @_;
2373
2374         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2375                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2376
2377         $from_lines = 0 unless defined $from_lines;
2378         $to_lines   = 0 unless defined $to_lines;
2379
2380         if ($from->{'href'}) {
2381                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2382                                      -class=>"list"}, $from_text);
2383         }
2384         if ($to->{'href'}) {
2385                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2386                                      -class=>"list"}, $to_text);
2387         }
2388         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2389                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2390         return $line;
2391 }
2392
2393 # assumes that $from and $to are defined and correctly filled,
2394 # and that $line holds a line of chunk header for combined diff
2395 sub format_cc_diff_chunk_header {
2396         my ($line, $from, $to) = @_;
2397
2398         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2399         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2400
2401         @from_text = split(' ', $ranges);
2402         for (my $i = 0; $i < @from_text; ++$i) {
2403                 ($from_start[$i], $from_nlines[$i]) =
2404                         (split(',', substr($from_text[$i], 1)), 0);
2405         }
2406
2407         $to_text   = pop @from_text;
2408         $to_start  = pop @from_start;
2409         $to_nlines = pop @from_nlines;
2410
2411         $line = "<span class=\"chunk_info\">$prefix ";
2412         for (my $i = 0; $i < @from_text; ++$i) {
2413                 if ($from->{'href'}[$i]) {
2414                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2415                                           -class=>"list"}, $from_text[$i]);
2416                 } else {
2417                         $line .= $from_text[$i];
2418                 }
2419                 $line .= " ";
2420         }
2421         if ($to->{'href'}) {
2422                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2423                                   -class=>"list"}, $to_text);
2424         } else {
2425                 $line .= $to_text;
2426         }
2427         $line .= " $prefix</span>" .
2428                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2429         return $line;
2430 }
2431
2432 # process patch (diff) line (not to be used for diff headers),
2433 # returning HTML-formatted (but not wrapped) line
2434 sub format_diff_line {
2435         my ($line, $diff_class, $from, $to) = @_;
2436
2437         chomp $line;
2438         $line = untabify($line);
2439
2440         if ($from && $to && $line =~ m/^\@{2} /) {
2441                 $line = format_unidiff_chunk_header($line, $from, $to);
2442         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2443                 $line = format_cc_diff_chunk_header($line, $from, $to);
2444         } else {
2445                 $line = esc_html($line, -nbsp=>1);
2446         }
2447
2448         my $diff_classes = "diff";
2449         $diff_classes .= " $diff_class" if ($diff_class);
2450         $line = "<div class=\"$diff_classes\">$line</div>\n";
2451
2452         return $line;
2453 }
2454
2455 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2456 # linked.  Pass the hash of the tree/commit to snapshot.
2457 sub format_snapshot_links {
2458         my ($hash) = @_;
2459         my $num_fmts = @snapshot_fmts;
2460         if ($num_fmts > 1) {
2461                 # A parenthesized list of links bearing format names.
2462                 # e.g. "snapshot (_tar.gz_ _zip_)"
2463                 return "snapshot (" . join(' ', map
2464                         $cgi->a({
2465                                 -href => href(
2466                                         action=>"snapshot",
2467                                         hash=>$hash,
2468                                         snapshot_format=>$_
2469                                 )
2470                         }, $known_snapshot_formats{$_}{'display'})
2471                 , @snapshot_fmts) . ")";
2472         } elsif ($num_fmts == 1) {
2473                 # A single "snapshot" link whose tooltip bears the format name.
2474                 # i.e. "_snapshot_"
2475                 my ($fmt) = @snapshot_fmts;
2476                 return
2477                         $cgi->a({
2478                                 -href => href(
2479                                         action=>"snapshot",
2480                                         hash=>$hash,
2481                                         snapshot_format=>$fmt
2482                                 ),
2483                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2484                         }, "snapshot");
2485         } else { # $num_fmts == 0
2486                 return undef;
2487         }
2488 }
2489
2490 ## ......................................................................
2491 ## functions returning values to be passed, perhaps after some
2492 ## transformation, to other functions; e.g. returning arguments to href()
2493
2494 # returns hash to be passed to href to generate gitweb URL
2495 # in -title key it returns description of link
2496 sub get_feed_info {
2497         my $format = shift || 'Atom';
2498         my %res = (action => lc($format));
2499
2500         # feed links are possible only for project views
2501         return unless (defined $project);
2502         # some views should link to OPML, or to generic project feed,
2503         # or don't have specific feed yet (so they should use generic)
2504         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2505
2506         my $branch;
2507         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2508         # from tag links; this also makes possible to detect branch links
2509         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2510             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2511                 $branch = $1;
2512         }
2513         # find log type for feed description (title)
2514         my $type = 'log';
2515         if (defined $file_name) {
2516                 $type  = "history of $file_name";
2517                 $type .= "/" if ($action eq 'tree');
2518                 $type .= " on '$branch'" if (defined $branch);
2519         } else {
2520                 $type = "log of $branch" if (defined $branch);
2521         }
2522
2523         $res{-title} = $type;
2524         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2525         $res{'file_name'} = $file_name;
2526
2527         return %res;
2528 }
2529
2530 ## ----------------------------------------------------------------------
2531 ## git utility subroutines, invoking git commands
2532
2533 # returns path to the core git executable and the --git-dir parameter as list
2534 sub git_cmd {
2535         $number_of_git_cmds++;
2536         return $GIT, '--git-dir='.$git_dir;
2537 }
2538
2539 # quote the given arguments for passing them to the shell
2540 # quote_command("command", "arg 1", "arg with ' and ! characters")
2541 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2542 # Try to avoid using this function wherever possible.
2543 sub quote_command {
2544         return join(' ',
2545                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2546 }
2547
2548 # get HEAD ref of given project as hash
2549 sub git_get_head_hash {
2550         return git_get_full_hash(shift, 'HEAD');
2551 }
2552
2553 sub git_get_full_hash {
2554         return git_get_hash(@_);
2555 }
2556
2557 sub git_get_short_hash {
2558         return git_get_hash(@_, '--short=7');
2559 }
2560
2561 sub git_get_hash {
2562         my ($project, $hash, @options) = @_;
2563         my $o_git_dir = $git_dir;
2564         my $retval = undef;
2565         $git_dir = "$projectroot/$project";
2566         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2567             '--verify', '-q', @options, $hash) {
2568                 $retval = <$fd>;
2569                 chomp $retval if defined $retval;
2570                 close $fd;
2571         }
2572         if (defined $o_git_dir) {
2573                 $git_dir = $o_git_dir;
2574         }
2575         return $retval;
2576 }
2577
2578 # get type of given object
2579 sub git_get_type {
2580         my $hash = shift;
2581
2582         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2583         my $type = <$fd>;
2584         close $fd or return;
2585         chomp $type;
2586         return $type;
2587 }
2588
2589 # repository configuration
2590 our $config_file = '';
2591 our %config;
2592
2593 # store multiple values for single key as anonymous array reference
2594 # single values stored directly in the hash, not as [ <value> ]
2595 sub hash_set_multi {
2596         my ($hash, $key, $value) = @_;
2597
2598         if (!exists $hash->{$key}) {
2599                 $hash->{$key} = $value;
2600         } elsif (!ref $hash->{$key}) {
2601                 $hash->{$key} = [ $hash->{$key}, $value ];
2602         } else {
2603                 push @{$hash->{$key}}, $value;
2604         }
2605 }
2606
2607 # return hash of git project configuration
2608 # optionally limited to some section, e.g. 'gitweb'
2609 sub git_parse_project_config {
2610         my $section_regexp = shift;
2611         my %config;
2612
2613         local $/ = "\0";
2614
2615         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2616                 or return;
2617
2618         while (my $keyval = <$fh>) {
2619                 chomp $keyval;
2620                 my ($key, $value) = split(/\n/, $keyval, 2);
2621
2622                 hash_set_multi(\%config, $key, $value)
2623                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2624         }
2625         close $fh;
2626
2627         return %config;
2628 }
2629
2630 # convert config value to boolean: 'true' or 'false'
2631 # no value, number > 0, 'true' and 'yes' values are true
2632 # rest of values are treated as false (never as error)
2633 sub config_to_bool {
2634         my $val = shift;
2635
2636         return 1 if !defined $val;             # section.key
2637
2638         # strip leading and trailing whitespace
2639         $val =~ s/^\s+//;
2640         $val =~ s/\s+$//;
2641
2642         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2643                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2644 }
2645
2646 # convert config value to simple decimal number
2647 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2648 # to be multiplied by 1024, 1048576, or 1073741824
2649 sub config_to_int {
2650         my $val = shift;
2651
2652         # strip leading and trailing whitespace
2653         $val =~ s/^\s+//;
2654         $val =~ s/\s+$//;
2655
2656         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2657                 $unit = lc($unit);
2658                 # unknown unit is treated as 1
2659                 return $num * ($unit eq 'g' ? 1073741824 :
2660                                $unit eq 'm' ?    1048576 :
2661                                $unit eq 'k' ?       1024 : 1);
2662         }
2663         return $val;
2664 }
2665
2666 # convert config value to array reference, if needed
2667 sub config_to_multi {
2668         my $val = shift;
2669
2670         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2671 }
2672
2673 sub git_get_project_config {
2674         my ($key, $type) = @_;
2675
2676         return unless defined $git_dir;
2677
2678         # key sanity check
2679         return unless ($key);
2680         # only subsection, if exists, is case sensitive,
2681         # and not lowercased by 'git config -z -l'
2682         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2683                 $key = join(".", lc($hi), $mi, lc($lo));
2684         } else {
2685                 $key = lc($key);
2686         }
2687         $key =~ s/^gitweb\.//;
2688         return if ($key =~ m/\W/);
2689
2690         # type sanity check
2691         if (defined $type) {
2692                 $type =~ s/^--//;
2693                 $type = undef
2694                         unless ($type eq 'bool' || $type eq 'int');
2695         }
2696
2697         # get config
2698         if (!defined $config_file ||
2699             $config_file ne "$git_dir/config") {
2700                 %config = git_parse_project_config('gitweb');
2701                 $config_file = "$git_dir/config";
2702         }
2703
2704         # check if config variable (key) exists
2705         return unless exists $config{"gitweb.$key"};
2706
2707         # ensure given type
2708         if (!defined $type) {
2709                 return $config{"gitweb.$key"};
2710         } elsif ($type eq 'bool') {
2711                 # backward compatibility: 'git config --bool' returns true/false
2712                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2713         } elsif ($type eq 'int') {
2714                 return config_to_int($config{"gitweb.$key"});
2715         }
2716         return $config{"gitweb.$key"};
2717 }
2718
2719 # get hash of given path at given ref
2720 sub git_get_hash_by_path {
2721         my $base = shift;
2722         my $path = shift || return undef;
2723         my $type = shift;
2724
2725         $path =~ s,/+$,,;
2726
2727         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2728                 or die_error(500, "Open git-ls-tree failed");
2729         my $line = <$fd>;
2730         close $fd or return undef;
2731
2732         if (!defined $line) {
2733                 # there is no tree or hash given by $path at $base
2734                 return undef;
2735         }
2736
2737         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2738         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2739         if (defined $type && $type ne $2) {
2740                 # type doesn't match
2741                 return undef;
2742         }
2743         return $3;
2744 }
2745
2746 # get path of entry with given hash at given tree-ish (ref)
2747 # used to get 'from' filename for combined diff (merge commit) for renames
2748 sub git_get_path_by_hash {
2749         my $base = shift || return;
2750         my $hash = shift || return;
2751
2752         local $/ = "\0";
2753
2754         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2755                 or return undef;
2756         while (my $line = <$fd>) {
2757                 chomp $line;
2758
2759                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2760                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2761                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2762                         close $fd;
2763                         return $1;
2764                 }
2765         }
2766         close $fd;
2767         return undef;
2768 }
2769
2770 ## ......................................................................
2771 ## git utility functions, directly accessing git repository
2772
2773 # get the value of config variable either from file named as the variable
2774 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2775 # configuration variable in the repository config file.
2776 sub git_get_file_or_project_config {
2777         my ($path, $name) = @_;
2778
2779         $git_dir = "$projectroot/$path";
2780         open my $fd, '<', "$git_dir/$name"
2781                 or return git_get_project_config($name);
2782         my $conf = <$fd>;
2783         close $fd;
2784         if (defined $conf) {
2785                 chomp $conf;
2786         }
2787         return $conf;
2788 }
2789
2790 sub git_get_project_description {
2791         my $path = shift;
2792         return git_get_file_or_project_config($path, 'description');
2793 }
2794
2795 sub git_get_project_category {
2796         my $path = shift;
2797         return git_get_file_or_project_config($path, 'category');
2798 }
2799
2800
2801 # supported formats:
2802 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2803 #   - if its contents is a number, use it as tag weight,
2804 #   - otherwise add a tag with weight 1
2805 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2806 #   the same value multiple times increases tag weight
2807 # * `gitweb.ctag' multi-valued repo config variable
2808 sub git_get_project_ctags {
2809         my $project = shift;
2810         my $ctags = {};
2811
2812         $git_dir = "$projectroot/$project";
2813         if (opendir my $dh, "$git_dir/ctags") {
2814                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2815                 foreach my $tagfile (@files) {
2816                         open my $ct, '<', $tagfile
2817                                 or next;
2818                         my $val = <$ct>;
2819                         chomp $val if $val;
2820                         close $ct;
2821
2822                         (my $ctag = $tagfile) =~ s#.*/##;
2823                         if ($val =~ /^\d+$/) {
2824                                 $ctags->{$ctag} = $val;
2825                         } else {
2826                                 $ctags->{$ctag} = 1;
2827                         }
2828                 }
2829                 closedir $dh;
2830
2831         } elsif (open my $fh, '<', "$git_dir/ctags") {
2832                 while (my $line = <$fh>) {
2833                         chomp $line;
2834                         $ctags->{$line}++ if $line;
2835                 }
2836                 close $fh;
2837
2838         } else {
2839                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2840                 foreach my $tag (@$taglist) {
2841                         $ctags->{$tag}++;
2842                 }
2843         }
2844
2845         return $ctags;
2846 }
2847
2848 # return hash, where keys are content tags ('ctags'),
2849 # and values are sum of weights of given tag in every project
2850 sub git_gather_all_ctags {
2851         my $projects = shift;
2852         my $ctags = {};
2853
2854         foreach my $p (@$projects) {
2855                 foreach my $ct (keys %{$p->{'ctags'}}) {
2856                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2857                 }
2858         }
2859
2860         return $ctags;
2861 }
2862
2863 sub git_populate_project_tagcloud {
2864         my $ctags = shift;
2865
2866         # First, merge different-cased tags; tags vote on casing
2867         my %ctags_lc;
2868         foreach (keys %$ctags) {
2869                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2870                 if (not $ctags_lc{lc $_}->{topcount}
2871                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2872                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2873                         $ctags_lc{lc $_}->{topname} = $_;
2874                 }
2875         }
2876
2877         my $cloud;
2878         my $matched = $input_params{'ctag'};
2879         if (eval { require HTML::TagCloud; 1; }) {
2880                 $cloud = HTML::TagCloud->new;
2881                 foreach my $ctag (sort keys %ctags_lc) {
2882                         # Pad the title with spaces so that the cloud looks
2883                         # less crammed.
2884                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2885                         $title =~ s/ /&nbsp;/g;
2886                         $title =~ s/^/&nbsp;/g;
2887                         $title =~ s/$/&nbsp;/g;
2888                         if (defined $matched && $matched eq $ctag) {
2889                                 $title = qq(<span class="match">$title</span>);
2890                         }
2891                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2892                                     $ctags_lc{$ctag}->{count});
2893                 }
2894         } else {
2895                 $cloud = {};
2896                 foreach my $ctag (keys %ctags_lc) {
2897                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2898                         if (defined $matched && $matched eq $ctag) {
2899                                 $title = qq(<span class="match">$title</span>);
2900                         }
2901                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2902                         $cloud->{$ctag}{ctag} =
2903                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2904                 }
2905         }
2906         return $cloud;
2907 }
2908
2909 sub git_show_project_tagcloud {
2910         my ($cloud, $count) = @_;
2911         if (ref $cloud eq 'HTML::TagCloud') {
2912                 return $cloud->html_and_css($count);
2913         } else {
2914                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2915                 return
2916                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2917                         join (', ', map {
2918                                 $cloud->{$_}->{'ctag'}
2919                         } splice(@tags, 0, $count)) .
2920                         '</div>';
2921         }
2922 }
2923
2924 sub git_get_project_url_list {
2925         my $path = shift;
2926
2927         $git_dir = "$projectroot/$path";
2928         open my $fd, '<', "$git_dir/cloneurl"
2929                 or return wantarray ?
2930                 @{ config_to_multi(git_get_project_config('url')) } :
2931                    config_to_multi(git_get_project_config('url'));
2932         my @git_project_url_list = map { chomp; $_ } <$fd>;
2933         close $fd;
2934
2935         return wantarray ? @git_project_url_list : \@git_project_url_list;
2936 }
2937
2938 sub git_get_projects_list {
2939         my $filter = shift || '';
2940         my $paranoid = shift;
2941         my @list;
2942
2943         if (-d $projects_list) {
2944                 # search in directory
2945                 my $dir = $projects_list;
2946                 # remove the trailing "/"
2947                 $dir =~ s!/+$!!;
2948                 my $pfxlen = length("$dir");
2949                 my $pfxdepth = ($dir =~ tr!/!!);
2950                 # when filtering, search only given subdirectory
2951                 if ($filter && !$paranoid) {
2952                         $dir .= "/$filter";
2953                         $dir =~ s!/+$!!;
2954                 }
2955
2956                 File::Find::find({
2957                         follow_fast => 1, # follow symbolic links
2958                         follow_skip => 2, # ignore duplicates
2959                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2960                         wanted => sub {
2961                                 # global variables
2962                                 our $project_maxdepth;
2963                                 our $projectroot;
2964                                 # skip project-list toplevel, if we get it.
2965                                 return if (m!^[/.]$!);
2966                                 # only directories can be git repositories
2967                                 return unless (-d $_);
2968                                 # don't traverse too deep (Find is super slow on os x)
2969                                 # $project_maxdepth excludes depth of $projectroot
2970                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2971                                         $File::Find::prune = 1;
2972                                         return;
2973                                 }
2974
2975                                 my $path = substr($File::Find::name, $pfxlen + 1);
2976                                 # paranoidly only filter here
2977                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2978                                         next;
2979                                 }
2980                                 # we check related file in $projectroot
2981                                 if (check_export_ok("$projectroot/$path")) {
2982                                         push @list, { path => $path };
2983                                         $File::Find::prune = 1;
2984                                 }
2985                         },
2986                 }, "$dir");
2987
2988         } elsif (-f $projects_list) {
2989                 # read from file(url-encoded):
2990                 # 'git%2Fgit.git Linus+Torvalds'
2991                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2992                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2993                 open my $fd, '<', $projects_list or return;
2994         PROJECT:
2995                 while (my $line = <$fd>) {
2996                         chomp $line;
2997                         my ($path, $owner) = split ' ', $line;
2998                         $path = unescape($path);
2999                         $owner = unescape($owner);
3000                         if (!defined $path) {
3001                                 next;
3002                         }
3003                         # if $filter is rpovided, check if $path begins with $filter
3004                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3005                                 next;
3006                         }
3007                         if (check_export_ok("$projectroot/$path")) {
3008                                 my $pr = {
3009                                         path => $path,
3010                                         owner => to_utf8($owner),
3011                                 };
3012                                 push @list, $pr;
3013                         }
3014                 }
3015                 close $fd;
3016         }
3017         return @list;
3018 }
3019
3020 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3021 # as side effects it sets 'forks' field to list of forks for forked projects
3022 sub filter_forks_from_projects_list {
3023         my $projects = shift;
3024
3025         my %trie; # prefix tree of directories (path components)
3026         # generate trie out of those directories that might contain forks
3027         foreach my $pr (@$projects) {
3028                 my $path = $pr->{'path'};
3029                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3030                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3031                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3032                 next unless (-d "$projectroot/$path"); # containing directory exists
3033                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3034
3035                 # add to trie
3036                 my @dirs = split('/', $path);
3037                 # walk the trie, until either runs out of components or out of trie
3038                 my $ref = \%trie;
3039                 while (scalar @dirs &&
3040                        exists($ref->{$dirs[0]})) {
3041                         $ref = $ref->{shift @dirs};
3042                 }
3043                 # create rest of trie structure from rest of components
3044                 foreach my $dir (@dirs) {
3045                         $ref = $ref->{$dir} = {};
3046                 }
3047                 # create end marker, store $pr as a data
3048                 $ref->{''} = $pr if (!exists $ref->{''});
3049         }
3050
3051         # filter out forks, by finding shortest prefix match for paths
3052         my @filtered;
3053  PROJECT:
3054         foreach my $pr (@$projects) {
3055                 # trie lookup
3056                 my $ref = \%trie;
3057         DIR:
3058                 foreach my $dir (split('/', $pr->{'path'})) {
3059                         if (exists $ref->{''}) {
3060                                 # found [shortest] prefix, is a fork - skip it
3061                                 push @{$ref->{''}{'forks'}}, $pr;
3062                                 next PROJECT;
3063                         }
3064                         if (!exists $ref->{$dir}) {
3065                                 # not in trie, cannot have prefix, not a fork
3066                                 push @filtered, $pr;
3067                                 next PROJECT;
3068                         }
3069                         # If the dir is there, we just walk one step down the trie.
3070                         $ref = $ref->{$dir};
3071                 }
3072                 # we ran out of trie
3073                 # (shouldn't happen: it's either no match, or end marker)
3074                 push @filtered, $pr;
3075         }
3076
3077         return @filtered;
3078 }
3079
3080 # note: fill_project_list_info must be run first,
3081 # for 'descr_long' and 'ctags' to be filled
3082 sub search_projects_list {
3083         my ($projlist, %opts) = @_;
3084         my $tagfilter  = $opts{'tagfilter'};
3085         my $search_re = $opts{'search_regexp'};
3086
3087         return @$projlist
3088                 unless ($tagfilter || $search_re);
3089
3090         # searching projects require filling to be run before it;
3091         fill_project_list_info($projlist,
3092                                $tagfilter  ? 'ctags' : (),
3093                                $search_re ? ('path', 'descr') : ());
3094         my @projects;
3095  PROJECT:
3096         foreach my $pr (@$projlist) {
3097
3098                 if ($tagfilter) {
3099                         next unless ref($pr->{'ctags'}) eq 'HASH';
3100                         next unless
3101                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3102                 }
3103
3104                 if ($search_re) {
3105                         next unless
3106                                 $pr->{'path'} =~ /$search_re/ ||
3107                                 $pr->{'descr_long'} =~ /$search_re/;
3108                 }
3109
3110                 push @projects, $pr;
3111         }
3112
3113         return @projects;
3114 }
3115
3116 our $gitweb_project_owner = undef;
3117 sub git_get_project_list_from_file {
3118
3119         return if (defined $gitweb_project_owner);
3120
3121         $gitweb_project_owner = {};
3122         # read from file (url-encoded):
3123         # 'git%2Fgit.git Linus+Torvalds'
3124         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3125         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3126         if (-f $projects_list) {
3127                 open(my $fd, '<', $projects_list);
3128                 while (my $line = <$fd>) {
3129                         chomp $line;
3130                         my ($pr, $ow) = split ' ', $line;
3131                         $pr = unescape($pr);
3132                         $ow = unescape($ow);
3133                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3134                 }
3135                 close $fd;
3136         }
3137 }
3138
3139 sub git_get_project_owner {
3140         my $project = shift;
3141         my $owner;
3142
3143         return undef unless $project;
3144         $git_dir = "$projectroot/$project";
3145
3146         if (!defined $gitweb_project_owner) {
3147                 git_get_project_list_from_file();
3148         }
3149
3150         if (exists $gitweb_project_owner->{$project}) {
3151                 $owner = $gitweb_project_owner->{$project};
3152         }
3153         if (!defined $owner){
3154                 $owner = git_get_project_config('owner');
3155         }
3156         if (!defined $owner) {
3157                 $owner = get_file_owner("$git_dir");
3158         }
3159
3160         return $owner;
3161 }
3162
3163 sub git_get_last_activity {
3164         my ($path) = @_;
3165         my $fd;
3166
3167         $git_dir = "$projectroot/$path";
3168         open($fd, "-|", git_cmd(), 'for-each-ref',
3169              '--format=%(committer)',
3170              '--sort=-committerdate',
3171              '--count=1',
3172              'refs/heads') or return;
3173         my $most_recent = <$fd>;
3174         close $fd or return;
3175         if (defined $most_recent &&
3176             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3177                 my $timestamp = $1;
3178                 my $age = time - $timestamp;
3179                 return ($age, age_string($age));
3180         }
3181         return (undef, undef);
3182 }
3183
3184 # Implementation note: when a single remote is wanted, we cannot use 'git
3185 # remote show -n' because that command always work (assuming it's a remote URL
3186 # if it's not defined), and we cannot use 'git remote show' because that would
3187 # try to make a network roundtrip. So the only way to find if that particular
3188 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3189 # and when we find what we want.
3190 sub git_get_remotes_list {
3191         my $wanted = shift;
3192         my %remotes = ();
3193
3194         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3195         return unless $fd;
3196         while (my $remote = <$fd>) {
3197                 chomp $remote;
3198                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3199                 next if $wanted and not $remote eq $wanted;
3200                 my ($url, $key) = ($1, $2);
3201
3202                 $remotes{$remote} ||= { 'heads' => () };
3203                 $remotes{$remote}{$key} = $url;
3204         }
3205         close $fd or return;
3206         return wantarray ? %remotes : \%remotes;
3207 }
3208
3209 # Takes a hash of remotes as first parameter and fills it by adding the
3210 # available remote heads for each of the indicated remotes.
3211 sub fill_remote_heads {
3212         my $remotes = shift;
3213         my @heads = map { "remotes/$_" } keys %$remotes;
3214         my @remoteheads = git_get_heads_list(undef, @heads);
3215         foreach my $remote (keys %$remotes) {
3216                 $remotes->{$remote}{'heads'} = [ grep {
3217                         $_->{'name'} =~ s!^$remote/!!
3218                         } @remoteheads ];
3219         }
3220 }
3221
3222 sub git_get_references {
3223         my $type = shift || "";
3224         my %refs;
3225         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3226         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3227         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3228                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3229                 or return;
3230
3231         while (my $line = <$fd>) {
3232                 chomp $line;
3233                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3234                         if (defined $refs{$1}) {
3235                                 push @{$refs{$1}}, $2;
3236                         } else {
3237                                 $refs{$1} = [ $2 ];
3238                         }
3239                 }
3240         }
3241         close $fd or return;
3242         return \%refs;
3243 }
3244
3245 sub git_get_rev_name_tags {
3246         my $hash = shift || return undef;
3247
3248         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3249                 or return;
3250         my $name_rev = <$fd>;
3251         close $fd;
3252
3253         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3254                 return $1;
3255         } else {
3256                 # catches also '$hash undefined' output
3257                 return undef;
3258         }
3259 }
3260
3261 ## ----------------------------------------------------------------------
3262 ## parse to hash functions
3263
3264 sub parse_date {
3265         my $epoch = shift;
3266         my $tz = shift || "-0000";
3267
3268         my %date;
3269         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3270         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3271         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3272         $date{'hour'} = $hour;
3273         $date{'minute'} = $min;
3274         $date{'mday'} = $mday;
3275         $date{'day'} = $days[$wday];
3276         $date{'month'} = $months[$mon];
3277         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3278                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3279         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3280                              $mday, $months[$mon], $hour ,$min;
3281         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3282                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3283
3284         my ($tz_sign, $tz_hour, $tz_min) =
3285                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3286         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3287         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3288         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3289         $date{'hour_local'} = $hour;
3290         $date{'minute_local'} = $min;
3291         $date{'tz_local'} = $tz;
3292         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3293                                   1900+$year, $mon+1, $mday,
3294                                   $hour, $min, $sec, $tz);
3295         return %date;
3296 }
3297
3298 sub parse_tag {
3299         my $tag_id = shift;
3300         my %tag;
3301         my @comment;
3302
3303         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3304         $tag{'id'} = $tag_id;
3305         while (my $line = <$fd>) {
3306                 chomp $line;
3307                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3308                         $tag{'object'} = $1;
3309                 } elsif ($line =~ m/^type (.+)$/) {
3310                         $tag{'type'} = $1;
3311                 } elsif ($line =~ m/^tag (.+)$/) {
3312                         $tag{'name'} = $1;
3313                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3314                         $tag{'author'} = $1;
3315                         $tag{'author_epoch'} = $2;
3316                         $tag{'author_tz'} = $3;
3317                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3318                                 $tag{'author_name'}  = $1;
3319                                 $tag{'author_email'} = $2;
3320                         } else {
3321                                 $tag{'author_name'} = $tag{'author'};
3322                         }
3323                 } elsif ($line =~ m/--BEGIN/) {
3324                         push @comment, $line;
3325                         last;
3326                 } elsif ($line eq "") {
3327                         last;
3328                 }
3329         }
3330         push @comment, <$fd>;
3331         $tag{'comment'} = \@comment;
3332         close $fd or return;
3333         if (!defined $tag{'name'}) {
3334                 return
3335         };
3336         return %tag
3337 }
3338
3339 sub parse_commit_text {
3340         my ($commit_text, $withparents) = @_;
3341         my @commit_lines = split '\n', $commit_text;
3342         my %co;
3343
3344         pop @commit_lines; # Remove '\0'
3345
3346         if (! @commit_lines) {
3347                 return;
3348         }
3349
3350         my $header = shift @commit_lines;
3351         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3352                 return;
3353         }
3354         ($co{'id'}, my @parents) = split ' ', $header;
3355         while (my $line = shift @commit_lines) {
3356                 last if $line eq "\n";
3357                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3358                         $co{'tree'} = $1;
3359                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3360                         push @parents, $1;
3361                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3362                         $co{'author'} = to_utf8($1);
3363                         $co{'author_epoch'} = $2;
3364                         $co{'author_tz'} = $3;
3365                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3366                                 $co{'author_name'}  = $1;
3367                                 $co{'author_email'} = $2;
3368                         } else {
3369                                 $co{'author_name'} = $co{'author'};
3370                         }
3371                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3372                         $co{'committer'} = to_utf8($1);
3373                         $co{'committer_epoch'} = $2;
3374                         $co{'committer_tz'} = $3;
3375                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3376                                 $co{'committer_name'}  = $1;
3377                                 $co{'committer_email'} = $2;
3378                         } else {
3379                                 $co{'committer_name'} = $co{'committer'};
3380                         }
3381                 }
3382         }
3383         if (!defined $co{'tree'}) {
3384                 return;
3385         };
3386         $co{'parents'} = \@parents;
3387         $co{'parent'} = $parents[0];
3388
3389         foreach my $title (@commit_lines) {
3390                 $title =~ s/^    //;
3391                 if ($title ne "") {
3392                         $co{'title'} = chop_str($title, 80, 5);
3393                         # remove leading stuff of merges to make the interesting part visible
3394                         if (length($title) > 50) {
3395                                 $title =~ s/^Automatic //;
3396                                 $title =~ s/^merge (of|with) /Merge ... /i;
3397                                 if (length($title) > 50) {
3398                                         $title =~ s/(http|rsync):\/\///;
3399                                 }
3400                                 if (length($title) > 50) {
3401                                         $title =~ s/(master|www|rsync)\.//;
3402                                 }
3403                                 if (length($title) > 50) {
3404                                         $title =~ s/kernel.org:?//;
3405                                 }
3406                                 if (length($title) > 50) {
3407                                         $title =~ s/\/pub\/scm//;
3408                                 }
3409                         }
3410                         $co{'title_short'} = chop_str($title, 50, 5);
3411                         last;
3412                 }
3413         }
3414         if (! defined $co{'title'} || $co{'title'} eq "") {
3415                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3416         }
3417         # remove added spaces
3418         foreach my $line (@commit_lines) {
3419                 $line =~ s/^    //;
3420         }
3421         $co{'comment'} = \@commit_lines;
3422
3423         my $age = time - $co{'committer_epoch'};
3424         $co{'age'} = $age;
3425         $co{'age_string'} = age_string($age);
3426         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3427         if ($age > 60*60*24*7*2) {
3428                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3429                 $co{'age_string_age'} = $co{'age_string'};
3430         } else {
3431                 $co{'age_string_date'} = $co{'age_string'};
3432                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3433         }
3434         return %co;
3435 }
3436
3437 sub parse_commit {
3438         my ($commit_id) = @_;
3439         my %co;
3440
3441         local $/ = "\0";
3442
3443         open my $fd, "-|", git_cmd(), "rev-list",
3444                 "--parents",
3445                 "--header",
3446                 "--max-count=1",
3447                 $commit_id,
3448                 "--",
3449                 or die_error(500, "Open git-rev-list failed");
3450         %co = parse_commit_text(<$fd>, 1);
3451         close $fd;
3452
3453         return %co;
3454 }
3455
3456 sub parse_commits {
3457         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3458         my @cos;
3459
3460         $maxcount ||= 1;
3461         $skip ||= 0;
3462
3463         local $/ = "\0";
3464
3465         open my $fd, "-|", git_cmd(), "rev-list",
3466                 "--header",
3467                 @args,
3468                 ("--max-count=" . $maxcount),
3469                 ("--skip=" . $skip),
3470                 @extra_options,
3471                 $commit_id,
3472                 "--",
3473                 ($filename ? ($filename) : ())
3474                 or die_error(500, "Open git-rev-list failed");
3475         while (my $line = <$fd>) {
3476                 my %co = parse_commit_text($line);
3477                 push @cos, \%co;
3478         }
3479         close $fd;
3480
3481         return wantarray ? @cos : \@cos;
3482 }
3483
3484 # parse line of git-diff-tree "raw" output
3485 sub parse_difftree_raw_line {
3486         my $line = shift;
3487         my %res;
3488
3489         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3490         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3491         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3492                 $res{'from_mode'} = $1;
3493                 $res{'to_mode'} = $2;
3494                 $res{'from_id'} = $3;
3495                 $res{'to_id'} = $4;
3496                 $res{'status'} = $5;
3497                 $res{'similarity'} = $6;
3498                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3499                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3500                 } else {
3501                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3502                 }
3503         }
3504         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3505         # combined diff (for merge commit)
3506         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3507                 $res{'nparents'}  = length($1);
3508                 $res{'from_mode'} = [ split(' ', $2) ];
3509                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3510                 $res{'from_id'} = [ split(' ', $3) ];
3511                 $res{'to_id'} = pop @{$res{'from_id'}};
3512                 $res{'status'} = [ split('', $4) ];
3513                 $res{'to_file'} = unquote($5);
3514         }
3515         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3516         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3517                 $res{'commit'} = $1;
3518         }
3519
3520         return wantarray ? %res : \%res;
3521 }
3522
3523 # wrapper: return parsed line of git-diff-tree "raw" output
3524 # (the argument might be raw line, or parsed info)
3525 sub parsed_difftree_line {
3526         my $line_or_ref = shift;
3527
3528         if (ref($line_or_ref) eq "HASH") {
3529                 # pre-parsed (or generated by hand)
3530                 return $line_or_ref;
3531         } else {
3532                 return parse_difftree_raw_line($line_or_ref);
3533         }
3534 }
3535
3536 # parse line of git-ls-tree output
3537 sub parse_ls_tree_line {
3538         my $line = shift;
3539         my %opts = @_;
3540         my %res;
3541
3542         if ($opts{'-l'}) {
3543                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3544                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3545
3546                 $res{'mode'} = $1;
3547                 $res{'type'} = $2;
3548                 $res{'hash'} = $3;
3549                 $res{'size'} = $4;
3550                 if ($opts{'-z'}) {
3551                         $res{'name'} = $5;
3552                 } else {
3553                         $res{'name'} = unquote($5);
3554                 }
3555         } else {
3556                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3557                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3558
3559                 $res{'mode'} = $1;
3560                 $res{'type'} = $2;
3561                 $res{'hash'} = $3;
3562                 if ($opts{'-z'}) {
3563                         $res{'name'} = $4;
3564                 } else {
3565                         $res{'name'} = unquote($4);
3566                 }
3567         }
3568
3569         return wantarray ? %res : \%res;
3570 }
3571
3572 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3573 sub parse_from_to_diffinfo {
3574         my ($diffinfo, $from, $to, @parents) = @_;
3575
3576         if ($diffinfo->{'nparents'}) {
3577                 # combined diff
3578                 $from->{'file'} = [];
3579                 $from->{'href'} = [];
3580                 fill_from_file_info($diffinfo, @parents)
3581                         unless exists $diffinfo->{'from_file'};
3582                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3583                         $from->{'file'}[$i] =
3584                                 defined $diffinfo->{'from_file'}[$i] ?
3585                                         $diffinfo->{'from_file'}[$i] :
3586                                         $diffinfo->{'to_file'};
3587                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3588                                 $from->{'href'}[$i] = href(action=>"blob",
3589                                                            hash_base=>$parents[$i],
3590                                                            hash=>$diffinfo->{'from_id'}[$i],
3591                                                            file_name=>$from->{'file'}[$i]);
3592                         } else {
3593                                 $from->{'href'}[$i] = undef;
3594                         }
3595                 }
3596         } else {
3597                 # ordinary (not combined) diff
3598                 $from->{'file'} = $diffinfo->{'from_file'};
3599                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3600                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3601                                                hash=>$diffinfo->{'from_id'},
3602                                                file_name=>$from->{'file'});
3603                 } else {
3604                         delete $from->{'href'};
3605                 }
3606         }
3607
3608         $to->{'file'} = $diffinfo->{'to_file'};
3609         if (!is_deleted($diffinfo)) { # file exists in result
3610                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3611                                      hash=>$diffinfo->{'to_id'},
3612                                      file_name=>$to->{'file'});
3613         } else {
3614                 delete $to->{'href'};
3615         }
3616 }
3617
3618 ## ......................................................................
3619 ## parse to array of hashes functions
3620
3621 sub git_get_heads_list {
3622         my ($limit, @classes) = @_;
3623         @classes = ('heads') unless @classes;
3624         my @patterns = map { "refs/$_" } @classes;
3625         my @headslist;
3626
3627         open my $fd, '-|', git_cmd(), 'for-each-ref',
3628                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3629                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3630                 @patterns
3631                 or return;
3632         while (my $line = <$fd>) {
3633                 my %ref_item;
3634
3635                 chomp $line;
3636                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3637                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3638                 my ($committer, $epoch, $tz) =
3639                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3640                 $ref_item{'fullname'}  = $name;
3641                 $name =~ s!^refs/(?:head|remote)s/!!;
3642
3643                 $ref_item{'name'}  = $name;
3644                 $ref_item{'id'}    = $hash;
3645                 $ref_item{'title'} = $title || '(no commit message)';
3646                 $ref_item{'epoch'} = $epoch;
3647                 if ($epoch) {
3648                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3649                 } else {
3650                         $ref_item{'age'} = "unknown";
3651                 }
3652
3653                 push @headslist, \%ref_item;
3654         }
3655         close $fd;
3656
3657         return wantarray ? @headslist : \@headslist;
3658 }
3659
3660 sub git_get_tags_list {
3661         my $limit = shift;
3662         my @tagslist;
3663
3664         open my $fd, '-|', git_cmd(), 'for-each-ref',
3665                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3666                 '--format=%(objectname) %(objecttype) %(refname) '.
3667                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3668                 'refs/tags'
3669                 or return;
3670         while (my $line = <$fd>) {
3671                 my %ref_item;
3672
3673                 chomp $line;
3674                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3675                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3676                 my ($creator, $epoch, $tz) =
3677                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3678                 $ref_item{'fullname'} = $name;
3679                 $name =~ s!^refs/tags/!!;
3680
3681                 $ref_item{'type'} = $type;
3682                 $ref_item{'id'} = $id;
3683                 $ref_item{'name'} = $name;
3684                 if ($type eq "tag") {
3685                         $ref_item{'subject'} = $title;
3686                         $ref_item{'reftype'} = $reftype;
3687                         $ref_item{'refid'}   = $refid;
3688                 } else {
3689                         $ref_item{'reftype'} = $type;
3690                         $ref_item{'refid'}   = $id;
3691                 }
3692
3693                 if ($type eq "tag" || $type eq "commit") {
3694                         $ref_item{'epoch'} = $epoch;
3695                         if ($epoch) {
3696                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3697                         } else {
3698                                 $ref_item{'age'} = "unknown";
3699                         }
3700                 }
3701
3702                 push @tagslist, \%ref_item;
3703         }
3704         close $fd;
3705
3706         return wantarray ? @tagslist : \@tagslist;
3707 }
3708
3709 ## ----------------------------------------------------------------------
3710 ## filesystem-related functions
3711
3712 sub get_file_owner {
3713         my $path = shift;
3714
3715         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3716         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3717         if (!defined $gcos) {
3718                 return undef;
3719         }
3720         my $owner = $gcos;
3721         $owner =~ s/[,;].*$//;
3722         return to_utf8($owner);
3723 }
3724
3725 # assume that file exists
3726 sub insert_file {
3727         my $filename = shift;
3728
3729         open my $fd, '<', $filename;
3730         print map { to_utf8($_) } <$fd>;
3731         close $fd;
3732 }
3733
3734 ## ......................................................................
3735 ## mimetype related functions
3736
3737 sub mimetype_guess_file {
3738         my $filename = shift;
3739         my $mimemap = shift;
3740         -r $mimemap or return undef;
3741
3742         my %mimemap;
3743         open(my $mh, '<', $mimemap) or return undef;
3744         while (<$mh>) {
3745                 next if m/^#/; # skip comments
3746                 my ($mimetype, @exts) = split(/\s+/);
3747                 foreach my $ext (@exts) {
3748                         $mimemap{$ext} = $mimetype;
3749                 }
3750         }
3751         close($mh);
3752
3753         $filename =~ /\.([^.]*)$/;
3754         return $mimemap{$1};
3755 }
3756
3757 sub mimetype_guess {
3758         my $filename = shift;
3759         my $mime;
3760         $filename =~ /\./ or return undef;
3761
3762         if ($mimetypes_file) {
3763                 my $file = $mimetypes_file;
3764                 if ($file !~ m!^/!) { # if it is relative path
3765                         # it is relative to project
3766                         $file = "$projectroot/$project/$file";
3767                 }
3768                 $mime = mimetype_guess_file($filename, $file);
3769         }
3770         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3771         return $mime;
3772 }
3773
3774 sub blob_mimetype {
3775         my $fd = shift;
3776         my $filename = shift;
3777
3778         if ($filename) {
3779                 my $mime = mimetype_guess($filename);
3780                 $mime and return $mime;
3781         }
3782
3783         # just in case
3784         return $default_blob_plain_mimetype unless $fd;
3785
3786         if (-T $fd) {
3787                 return 'text/plain';
3788         } elsif (! $filename) {
3789                 return 'application/octet-stream';
3790         } elsif ($filename =~ m/\.png$/i) {
3791                 return 'image/png';
3792         } elsif ($filename =~ m/\.gif$/i) {
3793                 return 'image/gif';
3794         } elsif ($filename =~ m/\.jpe?g$/i) {
3795                 return 'image/jpeg';
3796         } else {
3797                 return 'application/octet-stream';
3798         }
3799 }
3800
3801 sub blob_contenttype {
3802         my ($fd, $file_name, $type) = @_;
3803
3804         $type ||= blob_mimetype($fd, $file_name);
3805         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3806                 $type .= "; charset=$default_text_plain_charset";
3807         }
3808
3809         return $type;
3810 }
3811
3812 # guess file syntax for syntax highlighting; return undef if no highlighting
3813 # the name of syntax can (in the future) depend on syntax highlighter used
3814 sub guess_file_syntax {
3815         my ($highlight, $mimetype, $file_name) = @_;
3816         return undef unless ($highlight && defined $file_name);
3817         my $basename = basename($file_name, '.in');
3818         return $highlight_basename{$basename}
3819                 if exists $highlight_basename{$basename};
3820
3821         $basename =~ /\.([^.]*)$/;
3822         my $ext = $1 or return undef;
3823         return $highlight_ext{$ext}
3824                 if exists $highlight_ext{$ext};
3825
3826         return undef;
3827 }
3828
3829 # run highlighter and return FD of its output,
3830 # or return original FD if no highlighting
3831 sub run_highlighter {
3832         my ($fd, $highlight, $syntax) = @_;
3833         return $fd unless ($highlight && defined $syntax);
3834
3835         close $fd;
3836         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3837                   quote_command($highlight_bin).
3838                   " --replace-tabs=8 --fragment --syntax $syntax |"
3839                 or die_error(500, "Couldn't open file or run syntax highlighter");
3840         return $fd;
3841 }
3842
3843 ## ======================================================================
3844 ## functions printing HTML: header, footer, error page
3845
3846 sub get_page_title {
3847         my $title = to_utf8($site_name);
3848
3849         unless (defined $project) {
3850                 if (defined $project_filter) {
3851                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3852                 }
3853                 return $title;
3854         }
3855         $title .= " - " . to_utf8($project);
3856
3857         return $title unless (defined $action);
3858         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3859
3860         return $title unless (defined $file_name);
3861         $title .= " - " . esc_path($file_name);
3862         if ($action eq "tree" && $file_name !~ m|/$|) {
3863                 $title .= "/";
3864         }
3865
3866         return $title;
3867 }
3868
3869 sub get_content_type_html {
3870         # require explicit support from the UA if we are to send the page as
3871         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3872         # we have to do this because MSIE sometimes globs '*/*', pretending to
3873         # support xhtml+xml but choking when it gets what it asked for.
3874         if (defined $cgi->http('HTTP_ACCEPT') &&
3875             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3876             $cgi->Accept('application/xhtml+xml') != 0) {
3877                 return 'application/xhtml+xml';
3878         } else {
3879                 return 'text/html';
3880         }
3881 }
3882
3883 sub print_feed_meta {
3884         if (defined $project) {
3885                 my %href_params = get_feed_info();
3886                 if (!exists $href_params{'-title'}) {
3887                         $href_params{'-title'} = 'log';
3888                 }
3889
3890                 foreach my $format (qw(RSS Atom)) {
3891                         my $type = lc($format);
3892                         my %link_attr = (
3893                                 '-rel' => 'alternate',
3894                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3895                                 '-type' => "application/$type+xml"
3896                         );
3897
3898                         $href_params{'action'} = $type;
3899                         $link_attr{'-href'} = href(%href_params);
3900                         print "<link ".
3901                               "rel=\"$link_attr{'-rel'}\" ".
3902                               "title=\"$link_attr{'-title'}\" ".
3903                               "href=\"$link_attr{'-href'}\" ".
3904                               "type=\"$link_attr{'-type'}\" ".
3905                               "/>\n";
3906
3907                         $href_params{'extra_options'} = '--no-merges';
3908                         $link_attr{'-href'} = href(%href_params);
3909                         $link_attr{'-title'} .= ' (no merges)';
3910                         print "<link ".
3911                               "rel=\"$link_attr{'-rel'}\" ".
3912                               "title=\"$link_attr{'-title'}\" ".
3913                               "href=\"$link_attr{'-href'}\" ".
3914                               "type=\"$link_attr{'-type'}\" ".
3915                               "/>\n";
3916                 }
3917
3918         } else {
3919                 printf('<link rel="alternate" title="%s projects list" '.
3920                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3921                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3922                 printf('<link rel="alternate" title="%s projects feeds" '.
3923                        'href="%s" type="text/x-opml" />'."\n",
3924                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3925         }
3926 }
3927
3928 sub print_header_links {
3929         my $status = shift;
3930
3931         # print out each stylesheet that exist, providing backwards capability
3932         # for those people who defined $stylesheet in a config file
3933         if (defined $stylesheet) {
3934                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3935         } else {
3936                 foreach my $stylesheet (@stylesheets) {
3937                         next unless $stylesheet;
3938                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3939                 }
3940         }
3941         print_feed_meta()
3942                 if ($status eq '200 OK');
3943         if (defined $favicon) {
3944                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3945         }
3946 }
3947
3948 sub print_nav_breadcrumbs_path {
3949         my $dirprefix = undef;
3950         while (my $part = shift) {
3951                 $dirprefix .= "/" if defined $dirprefix;
3952                 $dirprefix .= $part;
3953                 print $cgi->a({-href => href(project => undef,
3954                                              project_filter => $dirprefix,
3955                                              action => "project_list")},
3956                               esc_html($part)) . " / ";
3957         }
3958 }
3959
3960 sub print_nav_breadcrumbs {
3961         my %opts = @_;
3962
3963         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3964         if (defined $project) {
3965                 my @dirname = split '/', $project;
3966                 my $projectbasename = pop @dirname;
3967                 print_nav_breadcrumbs_path(@dirname);
3968                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3969                 if (defined $action) {
3970                         my $action_print = $action ;
3971                         if (defined $opts{-action_extra}) {
3972                                 $action_print = $cgi->a({-href => href(action=>$action)},
3973                                         $action);
3974                         }
3975                         print " / $action_print";
3976                 }
3977                 if (defined $opts{-action_extra}) {
3978                         print " / $opts{-action_extra}";
3979                 }
3980                 print "\n";
3981         } elsif (defined $project_filter) {
3982                 print_nav_breadcrumbs_path(split '/', $project_filter);
3983         }
3984 }
3985
3986 sub print_search_form {
3987         if (!defined $searchtext) {
3988                 $searchtext = "";
3989         }
3990         my $search_hash;
3991         if (defined $hash_base) {
3992                 $search_hash = $hash_base;
3993         } elsif (defined $hash) {
3994                 $search_hash = $hash;
3995         } else {
3996                 $search_hash = "HEAD";
3997         }
3998         my $action = $my_uri;
3999         my $use_pathinfo = gitweb_check_feature('pathinfo');
4000         if ($use_pathinfo) {
4001                 $action .= "/".esc_url($project);
4002         }
4003         print $cgi->startform(-method => "get", -action => $action) .
4004               "<div class=\"search\">\n" .
4005               (!$use_pathinfo &&
4006               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4007               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4008               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4009               $cgi->popup_menu(-name => 'st', -default => 'commit',
4010                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4011               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4012               " search:\n",
4013               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4014               "<span title=\"Extended regular expression\">" .
4015               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4016                              -checked => $search_use_regexp) .
4017               "</span>" .
4018               "</div>" .
4019               $cgi->end_form() . "\n";
4020 }
4021
4022 sub git_header_html {
4023         my $status = shift || "200 OK";
4024         my $expires = shift;
4025         my %opts = @_;
4026
4027         my $title = get_page_title();
4028         my $content_type = get_content_type_html();
4029         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4030                            -status=> $status, -expires => $expires)
4031                 unless ($opts{'-no_http_header'});
4032         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4033         print <<EOF;
4034 <?xml version="1.0" encoding="utf-8"?>
4035 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4036 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4037 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4038 <!-- git core binaries version $git_version -->
4039 <head>
4040 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4041 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4042 <meta name="robots" content="index, nofollow"/>
4043 <title>$title</title>
4044 EOF
4045         # the stylesheet, favicon etc urls won't work correctly with path_info
4046         # unless we set the appropriate base URL
4047         if ($ENV{'PATH_INFO'}) {
4048                 print "<base href=\"".esc_url($base_url)."\" />\n";
4049         }
4050         print_header_links($status);
4051
4052         if (defined $site_html_head_string) {
4053                 print to_utf8($site_html_head_string);
4054         }
4055
4056         print "</head>\n" .
4057               "<body>\n";
4058
4059         if (defined $site_header && -f $site_header) {
4060                 insert_file($site_header);
4061         }
4062
4063         print "<div class=\"page_header\">\n";
4064         if (defined $logo) {
4065                 print $cgi->a({-href => esc_url($logo_url),
4066                                -title => $logo_label},
4067                               $cgi->img({-src => esc_url($logo),
4068                                          -width => 72, -height => 27,
4069                                          -alt => "git",
4070                                          -class => "logo"}));
4071         }
4072         print_nav_breadcrumbs(%opts);
4073         print "</div>\n";
4074
4075         my $have_search = gitweb_check_feature('search');
4076         if (defined $project && $have_search) {
4077                 print_search_form();
4078         }
4079 }
4080
4081 sub git_footer_html {
4082         my $feed_class = 'rss_logo';
4083
4084         print "<div class=\"page_footer\">\n";
4085         if (defined $project) {
4086                 my $descr = git_get_project_description($project);
4087                 if (defined $descr) {
4088                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4089                 }
4090
4091                 my %href_params = get_feed_info();
4092                 if (!%href_params) {
4093                         $feed_class .= ' generic';
4094                 }
4095                 $href_params{'-title'} ||= 'log';
4096
4097                 foreach my $format (qw(RSS Atom)) {
4098                         $href_params{'action'} = lc($format);
4099                         print $cgi->a({-href => href(%href_params),
4100                                       -title => "$href_params{'-title'} $format feed",
4101                                       -class => $feed_class}, $format)."\n";
4102                 }
4103
4104         } else {
4105                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4106                                              project_filter => $project_filter),
4107                               -class => $feed_class}, "OPML") . " ";
4108                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4109                                              project_filter => $project_filter),
4110                               -class => $feed_class}, "TXT") . "\n";
4111         }
4112         print "</div>\n"; # class="page_footer"
4113
4114         if (defined $t0 && gitweb_check_feature('timed')) {
4115                 print "<div id=\"generating_info\">\n";
4116                 print 'This page took '.
4117                       '<span id="generating_time" class="time_span">'.
4118                       tv_interval($t0, [ gettimeofday() ]).
4119                       ' seconds </span>'.
4120                       ' and '.
4121                       '<span id="generating_cmd">'.
4122                       $number_of_git_cmds.
4123                       '</span> git commands '.
4124                       " to generate.\n";
4125                 print "</div>\n"; # class="page_footer"
4126         }
4127
4128         if (defined $site_footer && -f $site_footer) {
4129                 insert_file($site_footer);
4130         }
4131
4132         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4133         if (defined $action &&
4134             $action eq 'blame_incremental') {
4135                 print qq!<script type="text/javascript">\n!.
4136                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4137                       qq!           "!. href() .qq!");\n!.
4138                       qq!</script>\n!;
4139         } else {
4140                 my ($jstimezone, $tz_cookie, $datetime_class) =
4141                         gitweb_get_feature('javascript-timezone');
4142
4143                 print qq!<script type="text/javascript">\n!.
4144                       qq!window.onload = function () {\n!;
4145                 if (gitweb_check_feature('javascript-actions')) {
4146                         print qq!       fixLinks();\n!;
4147                 }
4148                 if ($jstimezone && $tz_cookie && $datetime_class) {
4149                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4150                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4151                 }
4152                 print qq!};\n!.
4153                       qq!</script>\n!;
4154         }
4155
4156         print "</body>\n" .
4157               "</html>";
4158 }
4159
4160 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4161 # Example: die_error(404, 'Hash not found')
4162 # By convention, use the following status codes (as defined in RFC 2616):
4163 # 400: Invalid or missing CGI parameters, or
4164 #      requested object exists but has wrong type.
4165 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4166 #      this server or project.
4167 # 404: Requested object/revision/project doesn't exist.
4168 # 500: The server isn't configured properly, or
4169 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4170 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4171 # 503: The server is currently unavailable (because it is overloaded,
4172 #      or down for maintenance).  Generally, this is a temporary state.
4173 sub die_error {
4174         my $status = shift || 500;
4175         my $error = esc_html(shift) || "Internal Server Error";
4176         my $extra = shift;
4177         my %opts = @_;
4178
4179         my %http_responses = (
4180                 400 => '400 Bad Request',
4181                 403 => '403 Forbidden',
4182                 404 => '404 Not Found',
4183                 500 => '500 Internal Server Error',
4184                 503 => '503 Service Unavailable',
4185         );
4186         git_header_html($http_responses{$status}, undef, %opts);
4187         print <<EOF;
4188 <div class="page_body">
4189 <br /><br />
4190 $status - $error
4191 <br />
4192 EOF
4193         if (defined $extra) {
4194                 print "<hr />\n" .
4195                       "$extra\n";
4196         }
4197         print "</div>\n";
4198
4199         git_footer_html();
4200         goto DONE_GITWEB
4201                 unless ($opts{'-error_handler'});
4202 }
4203
4204 ## ----------------------------------------------------------------------
4205 ## functions printing or outputting HTML: navigation
4206
4207 sub git_print_page_nav {
4208         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4209         $extra = '' if !defined $extra; # pager or formats
4210
4211         my @navs = qw(summary shortlog log commit commitdiff tree);
4212         if ($suppress) {
4213                 @navs = grep { $_ ne $suppress } @navs;
4214         }
4215
4216         my %arg = map { $_ => {action=>$_} } @navs;
4217         if (defined $head) {
4218                 for (qw(commit commitdiff)) {
4219                         $arg{$_}{'hash'} = $head;
4220                 }
4221                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4222                         for (qw(shortlog log)) {
4223                                 $arg{$_}{'hash'} = $head;
4224                         }
4225                 }
4226         }
4227
4228         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4229         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4230
4231         my @actions = gitweb_get_feature('actions');
4232         my %repl = (
4233                 '%' => '%',
4234                 'n' => $project,         # project name
4235                 'f' => $git_dir,         # project path within filesystem
4236                 'h' => $treehead || '',  # current hash ('h' parameter)
4237                 'b' => $treebase || '',  # hash base ('hb' parameter)
4238         );
4239         while (@actions) {
4240                 my ($label, $link, $pos) = splice(@actions,0,3);
4241                 # insert
4242                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4243                 # munch munch
4244                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4245                 $arg{$label}{'_href'} = $link;
4246         }
4247
4248         print "<div class=\"page_nav\">\n" .
4249                 (join " | ",
4250                  map { $_ eq $current ?
4251                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4252                  } @navs);
4253         print "<br/>\n$extra<br/>\n" .
4254               "</div>\n";
4255 }
4256
4257 # returns a submenu for the nagivation of the refs views (tags, heads,
4258 # remotes) with the current view disabled and the remotes view only
4259 # available if the feature is enabled
4260 sub format_ref_views {
4261         my ($current) = @_;
4262         my @ref_views = qw{tags heads};
4263         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4264         return join " | ", map {
4265                 $_ eq $current ? $_ :
4266                 $cgi->a({-href => href(action=>$_)}, $_)
4267         } @ref_views
4268 }
4269
4270 sub format_paging_nav {
4271         my ($action, $page, $has_next_link) = @_;
4272         my $paging_nav;
4273
4274
4275         if ($page > 0) {
4276                 $paging_nav .=
4277                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4278                         " &sdot; " .
4279                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4280                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4281         } else {
4282                 $paging_nav .= "first &sdot; prev";
4283         }
4284
4285         if ($has_next_link) {
4286                 $paging_nav .= " &sdot; " .
4287                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4288                                  -accesskey => "n", -title => "Alt-n"}, "next");
4289         } else {
4290                 $paging_nav .= " &sdot; next";
4291         }
4292
4293         return $paging_nav;
4294 }
4295
4296 ## ......................................................................
4297 ## functions printing or outputting HTML: div
4298
4299 sub git_print_header_div {
4300         my ($action, $title, $hash, $hash_base) = @_;
4301         my %args = ();
4302
4303         $args{'action'} = $action;
4304         $args{'hash'} = $hash if $hash;
4305         $args{'hash_base'} = $hash_base if $hash_base;
4306
4307         print "<div class=\"header\">\n" .
4308               $cgi->a({-href => href(%args), -class => "title"},
4309               $title ? $title : $action) .
4310               "\n</div>\n";
4311 }
4312
4313 sub format_repo_url {
4314         my ($name, $url) = @_;
4315         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4316 }
4317
4318 # Group output by placing it in a DIV element and adding a header.
4319 # Options for start_div() can be provided by passing a hash reference as the
4320 # first parameter to the function.
4321 # Options to git_print_header_div() can be provided by passing an array
4322 # reference. This must follow the options to start_div if they are present.
4323 # The content can be a scalar, which is output as-is, a scalar reference, which
4324 # is output after html escaping, an IO handle passed either as *handle or
4325 # *handle{IO}, or a function reference. In the latter case all following
4326 # parameters will be taken as argument to the content function call.
4327 sub git_print_section {
4328         my ($div_args, $header_args, $content);
4329         my $arg = shift;
4330         if (ref($arg) eq 'HASH') {
4331                 $div_args = $arg;
4332                 $arg = shift;
4333         }
4334         if (ref($arg) eq 'ARRAY') {
4335                 $header_args = $arg;
4336                 $arg = shift;
4337         }
4338         $content = $arg;
4339
4340         print $cgi->start_div($div_args);
4341         git_print_header_div(@$header_args);
4342
4343         if (ref($content) eq 'CODE') {
4344                 $content->(@_);
4345         } elsif (ref($content) eq 'SCALAR') {
4346                 print esc_html($$content);
4347         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4348                 print <$content>;
4349         } elsif (!ref($content) && defined($content)) {
4350                 print $content;
4351         }
4352
4353         print $cgi->end_div;
4354 }
4355
4356 sub format_timestamp_html {
4357         my $date = shift;
4358         my $strtime = $date->{'rfc2822'};
4359
4360         my (undef, undef, $datetime_class) =
4361                 gitweb_get_feature('javascript-timezone');
4362         if ($datetime_class) {
4363                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4364         }
4365
4366         my $localtime_format = '(%02d:%02d %s)';
4367         if ($date->{'hour_local'} < 6) {
4368                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4369         }
4370         $strtime .= ' ' .
4371                     sprintf($localtime_format,
4372                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4373
4374         return $strtime;
4375 }
4376
4377 # Outputs the author name and date in long form
4378 sub git_print_authorship {
4379         my $co = shift;
4380         my %opts = @_;
4381         my $tag = $opts{-tag} || 'div';
4382         my $author = $co->{'author_name'};
4383
4384         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4385         print "<$tag class=\"author_date\">" .
4386               format_search_author($author, "author", esc_html($author)) .
4387               " [".format_timestamp_html(\%ad)."]".
4388               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4389               "</$tag>\n";
4390 }
4391
4392 # Outputs table rows containing the full author or committer information,
4393 # in the format expected for 'commit' view (& similar).
4394 # Parameters are a commit hash reference, followed by the list of people
4395 # to output information for. If the list is empty it defaults to both
4396 # author and committer.
4397 sub git_print_authorship_rows {
4398         my $co = shift;
4399         # too bad we can't use @people = @_ || ('author', 'committer')
4400         my @people = @_;
4401         @people = ('author', 'committer') unless @people;
4402         foreach my $who (@people) {
4403                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4404                 print "<tr><td>$who</td><td>" .
4405                       format_search_author($co->{"${who}_name"}, $who,
4406                                            esc_html($co->{"${who}_name"})) . " " .
4407                       format_search_author($co->{"${who}_email"}, $who,
4408                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4409                       "</td><td rowspan=\"2\">" .
4410                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4411                       "</td></tr>\n" .
4412                       "<tr>" .
4413                       "<td></td><td>" .
4414                       format_timestamp_html(\%wd) .
4415                       "</td>" .
4416                       "</tr>\n";
4417         }
4418 }
4419
4420 sub git_print_page_path {
4421         my $name = shift;
4422         my $type = shift;
4423         my $hb = shift;
4424
4425
4426         print "<div class=\"page_path\">";
4427         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4428                       -title => 'tree root'}, to_utf8("[$project]"));
4429         print " / ";
4430         if (defined $name) {
4431                 my @dirname = split '/', $name;
4432                 my $basename = pop @dirname;
4433                 my $fullname = '';
4434
4435                 foreach my $dir (@dirname) {
4436                         $fullname .= ($fullname ? '/' : '') . $dir;
4437                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4438                                                      hash_base=>$hb),
4439                                       -title => $fullname}, esc_path($dir));
4440                         print " / ";
4441                 }
4442                 if (defined $type && $type eq 'blob') {
4443                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4444                                                      hash_base=>$hb),
4445                                       -title => $name}, esc_path($basename));
4446                 } elsif (defined $type && $type eq 'tree') {
4447                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4448                                                      hash_base=>$hb),
4449                                       -title => $name}, esc_path($basename));
4450                         print " / ";
4451                 } else {
4452                         print esc_path($basename);
4453                 }
4454         }
4455         print "<br/></div>\n";
4456 }
4457
4458 sub git_print_log {
4459         my $log = shift;
4460         my %opts = @_;
4461
4462         if ($opts{'-remove_title'}) {
4463                 # remove title, i.e. first line of log
4464                 shift @$log;
4465         }
4466         # remove leading empty lines
4467         while (defined $log->[0] && $log->[0] eq "") {
4468                 shift @$log;
4469         }
4470
4471         # print log
4472         my $signoff = 0;
4473         my $empty = 0;
4474         foreach my $line (@$log) {
4475                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4476                         $signoff = 1;
4477                         $empty = 0;
4478                         if (! $opts{'-remove_signoff'}) {
4479                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4480                                 next;
4481                         } else {
4482                                 # remove signoff lines
4483                                 next;
4484                         }
4485                 } else {
4486                         $signoff = 0;
4487                 }
4488
4489                 # print only one empty line
4490                 # do not print empty line after signoff
4491                 if ($line eq "") {
4492                         next if ($empty || $signoff);
4493                         $empty = 1;
4494                 } else {
4495                         $empty = 0;
4496                 }
4497
4498                 print format_log_line_html($line) . "<br/>\n";
4499         }
4500
4501         if ($opts{'-final_empty_line'}) {
4502                 # end with single empty line
4503                 print "<br/>\n" unless $empty;
4504         }
4505 }
4506
4507 # return link target (what link points to)
4508 sub git_get_link_target {
4509         my $hash = shift;
4510         my $link_target;
4511
4512         # read link
4513         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4514                 or return;
4515         {
4516                 local $/ = undef;
4517                 $link_target = <$fd>;
4518         }
4519         close $fd
4520                 or return;
4521
4522         return $link_target;
4523 }
4524
4525 # given link target, and the directory (basedir) the link is in,
4526 # return target of link relative to top directory (top tree);
4527 # return undef if it is not possible (including absolute links).
4528 sub normalize_link_target {
4529         my ($link_target, $basedir) = @_;
4530
4531         # absolute symlinks (beginning with '/') cannot be normalized
4532         return if (substr($link_target, 0, 1) eq '/');
4533
4534         # normalize link target to path from top (root) tree (dir)
4535         my $path;
4536         if ($basedir) {
4537                 $path = $basedir . '/' . $link_target;
4538         } else {
4539                 # we are in top (root) tree (dir)
4540                 $path = $link_target;
4541         }
4542
4543         # remove //, /./, and /../
4544         my @path_parts;
4545         foreach my $part (split('/', $path)) {
4546                 # discard '.' and ''
4547                 next if (!$part || $part eq '.');
4548                 # handle '..'
4549                 if ($part eq '..') {
4550                         if (@path_parts) {
4551                                 pop @path_parts;
4552                         } else {
4553                                 # link leads outside repository (outside top dir)
4554                                 return;
4555                         }
4556                 } else {
4557                         push @path_parts, $part;
4558                 }
4559         }
4560         $path = join('/', @path_parts);
4561
4562         return $path;
4563 }
4564
4565 # print tree entry (row of git_tree), but without encompassing <tr> element
4566 sub git_print_tree_entry {
4567         my ($t, $basedir, $hash_base, $have_blame) = @_;
4568
4569         my %base_key = ();
4570         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4571
4572         # The format of a table row is: mode list link.  Where mode is
4573         # the mode of the entry, list is the name of the entry, an href,
4574         # and link is the action links of the entry.
4575
4576         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4577         if (exists $t->{'size'}) {
4578                 print "<td class=\"size\">$t->{'size'}</td>\n";
4579         }
4580         if ($t->{'type'} eq "blob") {
4581                 print "<td class=\"list\">" .
4582                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4583                                                file_name=>"$basedir$t->{'name'}", %base_key),
4584                                 -class => "list"}, esc_path($t->{'name'}));
4585                 if (S_ISLNK(oct $t->{'mode'})) {
4586                         my $link_target = git_get_link_target($t->{'hash'});
4587                         if ($link_target) {
4588                                 my $norm_target = normalize_link_target($link_target, $basedir);
4589                                 if (defined $norm_target) {
4590                                         print " -> " .
4591                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4592                                                                      file_name=>$norm_target),
4593                                                        -title => $norm_target}, esc_path($link_target));
4594                                 } else {
4595                                         print " -> " . esc_path($link_target);
4596                                 }
4597                         }
4598                 }
4599                 print "</td>\n";
4600                 print "<td class=\"link\">";
4601                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4602                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4603                               "blob");
4604                 if ($have_blame) {
4605                         print " | " .
4606                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4607                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4608                                       "blame");
4609                 }
4610                 if (defined $hash_base) {
4611                         print " | " .
4612                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4613                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4614                                       "history");
4615                 }
4616                 print " | " .
4617                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4618                                                file_name=>"$basedir$t->{'name'}")},
4619                                 "raw");
4620                 print "</td>\n";
4621
4622         } elsif ($t->{'type'} eq "tree") {
4623                 print "<td class=\"list\">";
4624                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4625                                              file_name=>"$basedir$t->{'name'}",
4626                                              %base_key)},
4627                               esc_path($t->{'name'}));
4628                 print "</td>\n";
4629                 print "<td class=\"link\">";
4630                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4631                                              file_name=>"$basedir$t->{'name'}",
4632                                              %base_key)},
4633                               "tree");
4634                 if (defined $hash_base) {
4635                         print " | " .
4636                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4637                                                      file_name=>"$basedir$t->{'name'}")},
4638                                       "history");
4639                 }
4640                 print "</td>\n";
4641         } else {
4642                 # unknown object: we can only present history for it
4643                 # (this includes 'commit' object, i.e. submodule support)
4644                 print "<td class=\"list\">" .
4645                       esc_path($t->{'name'}) .
4646                       "</td>\n";
4647                 print "<td class=\"link\">";
4648                 if (defined $hash_base) {
4649                         print $cgi->a({-href => href(action=>"history",
4650                                                      hash_base=>$hash_base,
4651                                                      file_name=>"$basedir$t->{'name'}")},
4652                                       "history");
4653                 }
4654                 print "</td>\n";
4655         }
4656 }
4657
4658 ## ......................................................................
4659 ## functions printing large fragments of HTML
4660
4661 # get pre-image filenames for merge (combined) diff
4662 sub fill_from_file_info {
4663         my ($diff, @parents) = @_;
4664
4665         $diff->{'from_file'} = [ ];
4666         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4667         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4668                 if ($diff->{'status'}[$i] eq 'R' ||
4669                     $diff->{'status'}[$i] eq 'C') {
4670                         $diff->{'from_file'}[$i] =
4671                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4672                 }
4673         }
4674
4675         return $diff;
4676 }
4677
4678 # is current raw difftree line of file deletion
4679 sub is_deleted {
4680         my $diffinfo = shift;
4681
4682         return $diffinfo->{'to_id'} eq ('0' x 40);
4683 }
4684
4685 # does patch correspond to [previous] difftree raw line
4686 # $diffinfo  - hashref of parsed raw diff format
4687 # $patchinfo - hashref of parsed patch diff format
4688 #              (the same keys as in $diffinfo)
4689 sub is_patch_split {
4690         my ($diffinfo, $patchinfo) = @_;
4691
4692         return defined $diffinfo && defined $patchinfo
4693                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4694 }
4695
4696
4697 sub git_difftree_body {
4698         my ($difftree, $hash, @parents) = @_;
4699         my ($parent) = $parents[0];
4700         my $have_blame = gitweb_check_feature('blame');
4701         print "<div class=\"list_head\">\n";
4702         if ($#{$difftree} > 10) {
4703                 print(($#{$difftree} + 1) . " files changed:\n");
4704         }
4705         print "</div>\n";
4706
4707         print "<table class=\"" .
4708               (@parents > 1 ? "combined " : "") .
4709               "diff_tree\">\n";
4710
4711         # header only for combined diff in 'commitdiff' view
4712         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4713         if ($has_header) {
4714                 # table header
4715                 print "<thead><tr>\n" .
4716                        "<th></th><th></th>\n"; # filename, patchN link
4717                 for (my $i = 0; $i < @parents; $i++) {
4718                         my $par = $parents[$i];
4719                         print "<th>" .
4720                               $cgi->a({-href => href(action=>"commitdiff",
4721                                                      hash=>$hash, hash_parent=>$par),
4722                                        -title => 'commitdiff to parent number ' .
4723                                                   ($i+1) . ': ' . substr($par,0,7)},
4724                                       $i+1) .
4725                               "&nbsp;</th>\n";
4726                 }
4727                 print "</tr></thead>\n<tbody>\n";
4728         }
4729
4730         my $alternate = 1;
4731         my $patchno = 0;
4732         foreach my $line (@{$difftree}) {
4733                 my $diff = parsed_difftree_line($line);
4734
4735                 if ($alternate) {
4736                         print "<tr class=\"dark\">\n";
4737                 } else {
4738                         print "<tr class=\"light\">\n";
4739                 }
4740                 $alternate ^= 1;
4741
4742                 if (exists $diff->{'nparents'}) { # combined diff
4743
4744                         fill_from_file_info($diff, @parents)
4745                                 unless exists $diff->{'from_file'};
4746
4747                         if (!is_deleted($diff)) {
4748                                 # file exists in the result (child) commit
4749                                 print "<td>" .
4750                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4751                                                              file_name=>$diff->{'to_file'},
4752                                                              hash_base=>$hash),
4753                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4754                                       "</td>\n";
4755                         } else {
4756                                 print "<td>" .
4757                                       esc_path($diff->{'to_file'}) .
4758                                       "</td>\n";
4759                         }
4760
4761                         if ($action eq 'commitdiff') {
4762                                 # link to patch
4763                                 $patchno++;
4764                                 print "<td class=\"link\">" .
4765                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4766                                               "patch") .
4767                                       " | " .
4768                                       "</td>\n";
4769                         }
4770
4771                         my $has_history = 0;
4772                         my $not_deleted = 0;
4773                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4774                                 my $hash_parent = $parents[$i];
4775                                 my $from_hash = $diff->{'from_id'}[$i];
4776                                 my $from_path = $diff->{'from_file'}[$i];
4777                                 my $status = $diff->{'status'}[$i];
4778
4779                                 $has_history ||= ($status ne 'A');
4780                                 $not_deleted ||= ($status ne 'D');
4781
4782                                 if ($status eq 'A') {
4783                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4784                                 } elsif ($status eq 'D') {
4785                                         print "<td class=\"link\">" .
4786                                               $cgi->a({-href => href(action=>"blob",
4787                                                                      hash_base=>$hash,
4788                                                                      hash=>$from_hash,
4789                                                                      file_name=>$from_path)},
4790                                                       "blob" . ($i+1)) .
4791                                               " | </td>\n";
4792                                 } else {
4793                                         if ($diff->{'to_id'} eq $from_hash) {
4794                                                 print "<td class=\"link nochange\">";
4795                                         } else {
4796                                                 print "<td class=\"link\">";
4797                                         }
4798                                         print $cgi->a({-href => href(action=>"blobdiff",
4799                                                                      hash=>$diff->{'to_id'},
4800                                                                      hash_parent=>$from_hash,
4801                                                                      hash_base=>$hash,
4802                                                                      hash_parent_base=>$hash_parent,
4803                                                                      file_name=>$diff->{'to_file'},
4804                                                                      file_parent=>$from_path)},
4805                                                       "diff" . ($i+1)) .
4806                                               " | </td>\n";
4807                                 }
4808                         }
4809
4810                         print "<td class=\"link\">";
4811                         if ($not_deleted) {
4812                                 print $cgi->a({-href => href(action=>"blob",
4813                                                              hash=>$diff->{'to_id'},
4814                                                              file_name=>$diff->{'to_file'},
4815                                                              hash_base=>$hash)},
4816                                               "blob");
4817                                 print " | " if ($has_history);
4818                         }
4819                         if ($has_history) {
4820                                 print $cgi->a({-href => href(action=>"history",
4821                                                              file_name=>$diff->{'to_file'},
4822                                                              hash_base=>$hash)},
4823                                               "history");
4824                         }
4825                         print "</td>\n";
4826
4827                         print "</tr>\n";
4828                         next; # instead of 'else' clause, to avoid extra indent
4829                 }
4830                 # else ordinary diff
4831
4832                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4833                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4834                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4835                         $to_mode_oct = oct $diff->{'to_mode'};
4836                         if (S_ISREG($to_mode_oct)) { # only for regular file
4837                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4838                         }
4839                         $to_file_type = file_type($diff->{'to_mode'});
4840                 }
4841                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4842                         $from_mode_oct = oct $diff->{'from_mode'};
4843                         if (S_ISREG($from_mode_oct)) { # only for regular file
4844                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4845                         }
4846                         $from_file_type = file_type($diff->{'from_mode'});
4847                 }
4848
4849                 if ($diff->{'status'} eq "A") { # created
4850                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4851                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4852                         $mode_chng   .= "]</span>";
4853                         print "<td>";
4854                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4855                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4856                                       -class => "list"}, esc_path($diff->{'file'}));
4857                         print "</td>\n";
4858                         print "<td>$mode_chng</td>\n";
4859                         print "<td class=\"link\">";
4860                         if ($action eq 'commitdiff') {
4861                                 # link to patch
4862                                 $patchno++;
4863                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4864                                               "patch") .
4865                                       " | ";
4866                         }
4867                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4868                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4869                                       "blob");
4870                         print "</td>\n";
4871
4872                 } elsif ($diff->{'status'} eq "D") { # deleted
4873                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4874                         print "<td>";
4875                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4876                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4877                                        -class => "list"}, esc_path($diff->{'file'}));
4878                         print "</td>\n";
4879                         print "<td>$mode_chng</td>\n";
4880                         print "<td class=\"link\">";
4881                         if ($action eq 'commitdiff') {
4882                                 # link to patch
4883                                 $patchno++;
4884                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4885                                               "patch") .
4886                                       " | ";
4887                         }
4888                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4889                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4890                                       "blob") . " | ";
4891                         if ($have_blame) {
4892                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4893                                                              file_name=>$diff->{'file'})},
4894                                               "blame") . " | ";
4895                         }
4896                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4897                                                      file_name=>$diff->{'file'})},
4898                                       "history");
4899                         print "</td>\n";
4900
4901                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4902                         my $mode_chnge = "";
4903                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4904                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4905                                 if ($from_file_type ne $to_file_type) {
4906                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4907                                 }
4908                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4909                                         if ($from_mode_str && $to_mode_str) {
4910                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4911                                         } elsif ($to_mode_str) {
4912                                                 $mode_chnge .= " mode: $to_mode_str";
4913                                         }
4914                                 }
4915                                 $mode_chnge .= "]</span>\n";
4916                         }
4917                         print "<td>";
4918                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4919                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4920                                       -class => "list"}, esc_path($diff->{'file'}));
4921                         print "</td>\n";
4922                         print "<td>$mode_chnge</td>\n";
4923                         print "<td class=\"link\">";
4924                         if ($action eq 'commitdiff') {
4925                                 # link to patch
4926                                 $patchno++;
4927                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4928                                               "patch") .
4929                                       " | ";
4930                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4931                                 # "commit" view and modified file (not onlu mode changed)
4932                                 print $cgi->a({-href => href(action=>"blobdiff",
4933                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4934                                                              hash_base=>$hash, hash_parent_base=>$parent,
4935                                                              file_name=>$diff->{'file'})},
4936                                               "diff") .
4937                                       " | ";
4938                         }
4939                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4940                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4941                                        "blob") . " | ";
4942                         if ($have_blame) {
4943                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4944                                                              file_name=>$diff->{'file'})},
4945                                               "blame") . " | ";
4946                         }
4947                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4948                                                      file_name=>$diff->{'file'})},
4949                                       "history");
4950                         print "</td>\n";
4951
4952                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4953                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4954                         my $nstatus = $status_name{$diff->{'status'}};
4955                         my $mode_chng = "";
4956                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4957                                 # mode also for directories, so we cannot use $to_mode_str
4958                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4959                         }
4960                         print "<td>" .
4961                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4962                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4963                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4964                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4965                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4966                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4967                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4968                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4969                               "<td class=\"link\">";
4970                         if ($action eq 'commitdiff') {
4971                                 # link to patch
4972                                 $patchno++;
4973                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4974                                               "patch") .
4975                                       " | ";
4976                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4977                                 # "commit" view and modified file (not only pure rename or copy)
4978                                 print $cgi->a({-href => href(action=>"blobdiff",
4979                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4980                                                              hash_base=>$hash, hash_parent_base=>$parent,
4981                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4982                                               "diff") .
4983                                       " | ";
4984                         }
4985                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4986                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4987                                       "blob") . " | ";
4988                         if ($have_blame) {
4989                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4990                                                              file_name=>$diff->{'to_file'})},
4991                                               "blame") . " | ";
4992                         }
4993                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4994                                                     file_name=>$diff->{'to_file'})},
4995                                       "history");
4996                         print "</td>\n";
4997
4998                 } # we should not encounter Unmerged (U) or Unknown (X) status
4999                 print "</tr>\n";
5000         }
5001         print "</tbody>" if $has_header;
5002         print "</table>\n";
5003 }
5004
5005 # Print context lines and then rem/add lines in a side-by-side manner.
5006 sub print_sidebyside_diff_lines {
5007         my ($ctx, $rem, $add) = @_;
5008
5009         # print context block before add/rem block
5010         if (@$ctx) {
5011                 print join '',
5012                         '<div class="chunk_block ctx">',
5013                                 '<div class="old">',
5014                                 @$ctx,
5015                                 '</div>',
5016                                 '<div class="new">',
5017                                 @$ctx,
5018                                 '</div>',
5019                         '</div>';
5020         }
5021
5022         if (!@$add) {
5023                 # pure removal
5024                 print join '',
5025                         '<div class="chunk_block rem">',
5026                                 '<div class="old">',
5027                                 @$rem,
5028                                 '</div>',
5029                         '</div>';
5030         } elsif (!@$rem) {
5031                 # pure addition
5032                 print join '',
5033                         '<div class="chunk_block add">',
5034                                 '<div class="new">',
5035                                 @$add,
5036                                 '</div>',
5037                         '</div>';
5038         } else {
5039                 print join '',
5040                         '<div class="chunk_block chg">',
5041                                 '<div class="old">',
5042                                 @$rem,
5043                                 '</div>',
5044                                 '<div class="new">',
5045                                 @$add,
5046                                 '</div>',
5047                         '</div>';
5048         }
5049 }
5050
5051 # Print context lines and then rem/add lines in inline manner.
5052 sub print_inline_diff_lines {
5053         my ($ctx, $rem, $add) = @_;
5054
5055         print @$ctx, @$rem, @$add;
5056 }
5057
5058 # Print context lines and then rem/add lines.
5059 sub print_diff_lines {
5060         my ($ctx, $rem, $add, $diff_style, $is_combined) = @_;
5061
5062         if ($diff_style eq 'sidebyside' && !$is_combined) {
5063                 print_sidebyside_diff_lines($ctx, $rem, $add);
5064         } else {
5065                 # default 'inline' style and unknown styles
5066                 print_inline_diff_lines($ctx, $rem, $add);
5067         }
5068 }
5069
5070 sub print_diff_chunk {
5071         my ($diff_style, $is_combined, $from, $to, @chunk) = @_;
5072         my (@ctx, @rem, @add);
5073
5074         # The class of the previous line.
5075         my $prev_class = '';
5076
5077         return unless @chunk;
5078
5079         # incomplete last line might be among removed or added lines,
5080         # or both, or among context lines: find which
5081         for (my $i = 1; $i < @chunk; $i++) {
5082                 if ($chunk[$i][0] eq 'incomplete') {
5083                         $chunk[$i][0] = $chunk[$i-1][0];
5084                 }
5085         }
5086
5087         # guardian
5088         push @chunk, ["", ""];
5089
5090         foreach my $line_info (@chunk) {
5091                 my ($class, $line) = @$line_info;
5092
5093                 $line = format_diff_line($line, $class, $from, $to);
5094
5095                 # print chunk headers
5096                 if ($class && $class eq 'chunk_header') {
5097                         print $line;
5098                         next;
5099                 }
5100
5101                 ## print from accumulator when have some add/rem lines or end
5102                 # of chunk (flush context lines), or when have add and rem
5103                 # lines and new block is reached (otherwise add/rem lines could
5104                 # be reordered)
5105                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5106                     (@rem && @add && $class ne $prev_class)) {
5107                         print_diff_lines(\@ctx, \@rem, \@add,
5108                                          $diff_style, $is_combined);
5109                         @ctx = @rem = @add = ();
5110                 }
5111
5112                 ## adding lines to accumulator
5113                 # guardian value
5114                 last unless $line;
5115                 # rem, add or change
5116                 if ($class eq 'rem') {
5117                         push @rem, $line;
5118                 } elsif ($class eq 'add') {
5119                         push @add, $line;
5120                 }
5121                 # context line
5122                 if ($class eq 'ctx') {
5123                         push @ctx, $line;
5124                 }
5125
5126                 $prev_class = $class;
5127         }
5128 }
5129
5130 sub git_patchset_body {
5131         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5132         my ($hash_parent) = $hash_parents[0];
5133
5134         my $is_combined = (@hash_parents > 1);
5135         my $patch_idx = 0;
5136         my $patch_number = 0;
5137         my $patch_line;
5138         my $diffinfo;
5139         my $to_name;
5140         my (%from, %to);
5141         my @chunk; # for side-by-side diff
5142
5143         print "<div class=\"patchset\">\n";
5144
5145         # skip to first patch
5146         while ($patch_line = <$fd>) {
5147                 chomp $patch_line;
5148
5149                 last if ($patch_line =~ m/^diff /);
5150         }
5151
5152  PATCH:
5153         while ($patch_line) {
5154
5155                 # parse "git diff" header line
5156                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5157                         # $1 is from_name, which we do not use
5158                         $to_name = unquote($2);
5159                         $to_name =~ s!^b/!!;
5160                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5161                         # $1 is 'cc' or 'combined', which we do not use
5162                         $to_name = unquote($2);
5163                 } else {
5164                         $to_name = undef;
5165                 }
5166
5167                 # check if current patch belong to current raw line
5168                 # and parse raw git-diff line if needed
5169                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5170                         # this is continuation of a split patch
5171                         print "<div class=\"patch cont\">\n";
5172                 } else {
5173                         # advance raw git-diff output if needed
5174                         $patch_idx++ if defined $diffinfo;
5175
5176                         # read and prepare patch information
5177                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5178
5179                         # compact combined diff output can have some patches skipped
5180                         # find which patch (using pathname of result) we are at now;
5181                         if ($is_combined) {
5182                                 while ($to_name ne $diffinfo->{'to_file'}) {
5183                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5184                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5185                                               "</div>\n";  # class="patch"
5186
5187                                         $patch_idx++;
5188                                         $patch_number++;
5189
5190                                         last if $patch_idx > $#$difftree;
5191                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5192                                 }
5193                         }
5194
5195                         # modifies %from, %to hashes
5196                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5197
5198                         # this is first patch for raw difftree line with $patch_idx index
5199                         # we index @$difftree array from 0, but number patches from 1
5200                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5201                 }
5202
5203                 # git diff header
5204                 #assert($patch_line =~ m/^diff /) if DEBUG;
5205                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5206                 $patch_number++;
5207                 # print "git diff" header
5208                 print format_git_diff_header_line($patch_line, $diffinfo,
5209                                                   \%from, \%to);
5210
5211                 # print extended diff header
5212                 print "<div class=\"diff extended_header\">\n";
5213         EXTENDED_HEADER:
5214                 while ($patch_line = <$fd>) {
5215                         chomp $patch_line;
5216
5217                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5218
5219                         print format_extended_diff_header_line($patch_line, $diffinfo,
5220                                                                \%from, \%to);
5221                 }
5222                 print "</div>\n"; # class="diff extended_header"
5223
5224                 # from-file/to-file diff header
5225                 if (! $patch_line) {
5226                         print "</div>\n"; # class="patch"
5227                         last PATCH;
5228                 }
5229                 next PATCH if ($patch_line =~ m/^diff /);
5230                 #assert($patch_line =~ m/^---/) if DEBUG;
5231
5232                 my $last_patch_line = $patch_line;
5233                 $patch_line = <$fd>;
5234                 chomp $patch_line;
5235                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5236
5237                 print format_diff_from_to_header($last_patch_line, $patch_line,
5238                                                  $diffinfo, \%from, \%to,
5239                                                  @hash_parents);
5240
5241                 # the patch itself
5242         LINE:
5243                 while ($patch_line = <$fd>) {
5244                         chomp $patch_line;
5245
5246                         next PATCH if ($patch_line =~ m/^diff /);
5247
5248                         my $class = diff_line_class($patch_line, \%from, \%to);
5249
5250                         if ($class eq 'chunk_header') {
5251                                 print_diff_chunk($diff_style, $is_combined, \%from, \%to, @chunk);
5252                                 @chunk = ();
5253                         }
5254
5255                         push @chunk, [ $class, $patch_line ];
5256                 }
5257
5258         } continue {
5259                 if (@chunk) {
5260                         print_diff_chunk($diff_style, $is_combined, \%from, \%to, @chunk);
5261                         @chunk = ();
5262                 }
5263                 print "</div>\n"; # class="patch"
5264         }
5265
5266         # for compact combined (--cc) format, with chunk and patch simplification
5267         # the patchset might be empty, but there might be unprocessed raw lines
5268         for (++$patch_idx if $patch_number > 0;
5269              $patch_idx < @$difftree;
5270              ++$patch_idx) {
5271                 # read and prepare patch information
5272                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5273
5274                 # generate anchor for "patch" links in difftree / whatchanged part
5275                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5276                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5277                       "</div>\n";  # class="patch"
5278
5279                 $patch_number++;
5280         }
5281
5282         if ($patch_number == 0) {
5283                 if (@hash_parents > 1) {
5284                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5285                 } else {
5286                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5287                 }
5288         }
5289
5290         print "</div>\n"; # class="patchset"
5291 }
5292
5293 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5294
5295 sub git_project_search_form {
5296         my ($searchtext, $search_use_regexp) = @_;
5297
5298         my $limit = '';
5299         if ($project_filter) {
5300                 $limit = " in '$project_filter/'";
5301         }
5302
5303         print "<div class=\"projsearch\">\n";
5304         print $cgi->startform(-method => 'get', -action => $my_uri) .
5305               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5306         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5307                 if (defined $project_filter);
5308         print $cgi->textfield(-name => 's', -value => $searchtext,
5309                               -title => "Search project by name and description$limit",
5310                               -size => 60) . "\n" .
5311               "<span title=\"Extended regular expression\">" .
5312               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5313                              -checked => $search_use_regexp) .
5314               "</span>\n" .
5315               $cgi->submit(-name => 'btnS', -value => 'Search') .
5316               $cgi->end_form() . "\n" .
5317               $cgi->a({-href => href(project => undef, searchtext => undef,
5318                                      project_filter => $project_filter)},
5319                       esc_html("List all projects$limit")) . "<br />\n";
5320         print "</div>\n";
5321 }
5322
5323 # entry for given @keys needs filling if at least one of keys in list
5324 # is not present in %$project_info
5325 sub project_info_needs_filling {
5326         my ($project_info, @keys) = @_;
5327
5328         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5329         foreach my $key (@keys) {
5330                 if (!exists $project_info->{$key}) {
5331                         return 1;
5332                 }
5333         }
5334         return;
5335 }
5336
5337 # fills project list info (age, description, owner, category, forks, etc.)
5338 # for each project in the list, removing invalid projects from
5339 # returned list, or fill only specified info.
5340 #
5341 # Invalid projects are removed from the returned list if and only if you
5342 # ask 'age' or 'age_string' to be filled, because they are the only fields
5343 # that run unconditionally git command that requires repository, and
5344 # therefore do always check if project repository is invalid.
5345 #
5346 # USAGE:
5347 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5348 #   ensures that 'descr_long' and 'ctags' fields are filled
5349 # * @project_list = fill_project_list_info(\@project_list)
5350 #   ensures that all fields are filled (and invalid projects removed)
5351 #
5352 # NOTE: modifies $projlist, but does not remove entries from it
5353 sub fill_project_list_info {
5354         my ($projlist, @wanted_keys) = @_;
5355         my @projects;
5356         my $filter_set = sub { return @_; };
5357         if (@wanted_keys) {
5358                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5359                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5360         }
5361
5362         my $show_ctags = gitweb_check_feature('ctags');
5363  PROJECT:
5364         foreach my $pr (@$projlist) {
5365                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5366                         my (@activity) = git_get_last_activity($pr->{'path'});
5367                         unless (@activity) {
5368                                 next PROJECT;
5369                         }
5370                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5371                 }
5372                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5373                         my $descr = git_get_project_description($pr->{'path'}) || "";
5374                         $descr = to_utf8($descr);
5375                         $pr->{'descr_long'} = $descr;
5376                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5377                 }
5378                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5379                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5380                 }
5381                 if ($show_ctags &&
5382                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5383                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5384                 }
5385                 if ($projects_list_group_categories &&
5386                     project_info_needs_filling($pr, $filter_set->('category'))) {
5387                         my $cat = git_get_project_category($pr->{'path'}) ||
5388                                                            $project_list_default_category;
5389                         $pr->{'category'} = to_utf8($cat);
5390                 }
5391
5392                 push @projects, $pr;
5393         }
5394
5395         return @projects;
5396 }
5397
5398 sub sort_projects_list {
5399         my ($projlist, $order) = @_;
5400         my @projects;
5401
5402         my %order_info = (
5403                 project => { key => 'path', type => 'str' },
5404                 descr => { key => 'descr_long', type => 'str' },
5405                 owner => { key => 'owner', type => 'str' },
5406                 age => { key => 'age', type => 'num' }
5407         );
5408         my $oi = $order_info{$order};
5409         return @$projlist unless defined $oi;
5410         if ($oi->{'type'} eq 'str') {
5411                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5412         } else {
5413                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5414         }
5415
5416         return @projects;
5417 }
5418
5419 # returns a hash of categories, containing the list of project
5420 # belonging to each category
5421 sub build_projlist_by_category {
5422         my ($projlist, $from, $to) = @_;
5423         my %categories;
5424
5425         $from = 0 unless defined $from;
5426         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5427
5428         for (my $i = $from; $i <= $to; $i++) {
5429                 my $pr = $projlist->[$i];
5430                 push @{$categories{ $pr->{'category'} }}, $pr;
5431         }
5432
5433         return wantarray ? %categories : \%categories;
5434 }
5435
5436 # print 'sort by' <th> element, generating 'sort by $name' replay link
5437 # if that order is not selected
5438 sub print_sort_th {
5439         print format_sort_th(@_);
5440 }
5441
5442 sub format_sort_th {
5443         my ($name, $order, $header) = @_;
5444         my $sort_th = "";
5445         $header ||= ucfirst($name);
5446
5447         if ($order eq $name) {
5448                 $sort_th .= "<th>$header</th>\n";
5449         } else {
5450                 $sort_th .= "<th>" .
5451                             $cgi->a({-href => href(-replay=>1, order=>$name),
5452                                      -class => "header"}, $header) .
5453                             "</th>\n";
5454         }
5455
5456         return $sort_th;
5457 }
5458
5459 sub git_project_list_rows {
5460         my ($projlist, $from, $to, $check_forks) = @_;
5461
5462         $from = 0 unless defined $from;
5463         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5464
5465         my $alternate = 1;
5466         for (my $i = $from; $i <= $to; $i++) {
5467                 my $pr = $projlist->[$i];
5468
5469                 if ($alternate) {
5470                         print "<tr class=\"dark\">\n";
5471                 } else {
5472                         print "<tr class=\"light\">\n";
5473                 }
5474                 $alternate ^= 1;
5475
5476                 if ($check_forks) {
5477                         print "<td>";
5478                         if ($pr->{'forks'}) {
5479                                 my $nforks = scalar @{$pr->{'forks'}};
5480                                 if ($nforks > 0) {
5481                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5482                                                        -title => "$nforks forks"}, "+");
5483                                 } else {
5484                                         print $cgi->span({-title => "$nforks forks"}, "+");
5485                                 }
5486                         }
5487                         print "</td>\n";
5488                 }
5489                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5490                                         -class => "list"},
5491                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5492                       "</td>\n" .
5493                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5494                                         -class => "list",
5495                                         -title => $pr->{'descr_long'}},
5496                                         $search_regexp
5497                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5498                                                                     $pr->{'descr'}, $search_regexp)
5499                                         : esc_html($pr->{'descr'})) .
5500                       "</td>\n" .
5501                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5502                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5503                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5504                       "<td class=\"link\">" .
5505                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5506                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5507                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5508                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5509                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5510                       "</td>\n" .
5511                       "</tr>\n";
5512         }
5513 }
5514
5515 sub git_project_list_body {
5516         # actually uses global variable $project
5517         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5518         my @projects = @$projlist;
5519
5520         my $check_forks = gitweb_check_feature('forks');
5521         my $show_ctags  = gitweb_check_feature('ctags');
5522         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5523         $check_forks = undef
5524                 if ($tagfilter || $search_regexp);
5525
5526         # filtering out forks before filling info allows to do less work
5527         @projects = filter_forks_from_projects_list(\@projects)
5528                 if ($check_forks);
5529         # search_projects_list pre-fills required info
5530         @projects = search_projects_list(\@projects,
5531                                          'search_regexp' => $search_regexp,
5532                                          'tagfilter'  => $tagfilter)
5533                 if ($tagfilter || $search_regexp);
5534         # fill the rest
5535         @projects = fill_project_list_info(\@projects);
5536
5537         $order ||= $default_projects_order;
5538         $from = 0 unless defined $from;
5539         $to = $#projects if (!defined $to || $#projects < $to);
5540
5541         # short circuit
5542         if ($from > $to) {
5543                 print "<center>\n".
5544                       "<b>No such projects found</b><br />\n".
5545                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5546                       "</center>\n<br />\n";
5547                 return;
5548         }
5549
5550         @projects = sort_projects_list(\@projects, $order);
5551
5552         if ($show_ctags) {
5553                 my $ctags = git_gather_all_ctags(\@projects);
5554                 my $cloud = git_populate_project_tagcloud($ctags);
5555                 print git_show_project_tagcloud($cloud, 64);
5556         }
5557
5558         print "<table class=\"project_list\">\n";
5559         unless ($no_header) {
5560                 print "<tr>\n";
5561                 if ($check_forks) {
5562                         print "<th></th>\n";
5563                 }
5564                 print_sort_th('project', $order, 'Project');
5565                 print_sort_th('descr', $order, 'Description');
5566                 print_sort_th('owner', $order, 'Owner');
5567                 print_sort_th('age', $order, 'Last Change');
5568                 print "<th></th>\n" . # for links
5569                       "</tr>\n";
5570         }
5571
5572         if ($projects_list_group_categories) {
5573                 # only display categories with projects in the $from-$to window
5574                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5575                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5576                 foreach my $cat (sort keys %categories) {
5577                         unless ($cat eq "") {
5578                                 print "<tr>\n";
5579                                 if ($check_forks) {
5580                                         print "<td></td>\n";
5581                                 }
5582                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5583                                 print "</tr>\n";
5584                         }
5585
5586                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5587                 }
5588         } else {
5589                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5590         }
5591
5592         if (defined $extra) {
5593                 print "<tr>\n";
5594                 if ($check_forks) {
5595                         print "<td></td>\n";
5596                 }
5597                 print "<td colspan=\"5\">$extra</td>\n" .
5598                       "</tr>\n";
5599         }
5600         print "</table>\n";
5601 }
5602
5603 sub git_log_body {
5604         # uses global variable $project
5605         my ($commitlist, $from, $to, $refs, $extra) = @_;
5606
5607         $from = 0 unless defined $from;
5608         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5609
5610         for (my $i = 0; $i <= $to; $i++) {
5611                 my %co = %{$commitlist->[$i]};
5612                 next if !%co;
5613                 my $commit = $co{'id'};
5614                 my $ref = format_ref_marker($refs, $commit);
5615                 git_print_header_div('commit',
5616                                "<span class=\"age\">$co{'age_string'}</span>" .
5617                                esc_html($co{'title'}) . $ref,
5618                                $commit);
5619                 print "<div class=\"title_text\">\n" .
5620                       "<div class=\"log_link\">\n" .
5621                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5622                       " | " .
5623                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5624                       " | " .
5625                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5626                       "<br/>\n" .
5627                       "</div>\n";
5628                       git_print_authorship(\%co, -tag => 'span');
5629                       print "<br/>\n</div>\n";
5630
5631                 print "<div class=\"log_body\">\n";
5632                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5633                 print "</div>\n";
5634         }
5635         if ($extra) {
5636                 print "<div class=\"page_nav\">\n";
5637                 print "$extra\n";
5638                 print "</div>\n";
5639         }
5640 }
5641
5642 sub git_shortlog_body {
5643         # uses global variable $project
5644         my ($commitlist, $from, $to, $refs, $extra) = @_;
5645
5646         $from = 0 unless defined $from;
5647         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5648
5649         print "<table class=\"shortlog\">\n";
5650         my $alternate = 1;
5651         for (my $i = $from; $i <= $to; $i++) {
5652                 my %co = %{$commitlist->[$i]};
5653                 my $commit = $co{'id'};
5654                 my $ref = format_ref_marker($refs, $commit);
5655                 if ($alternate) {
5656                         print "<tr class=\"dark\">\n";
5657                 } else {
5658                         print "<tr class=\"light\">\n";
5659                 }
5660                 $alternate ^= 1;
5661                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5662                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5663                       format_author_html('td', \%co, 10) . "<td>";
5664                 print format_subject_html($co{'title'}, $co{'title_short'},
5665                                           href(action=>"commit", hash=>$commit), $ref);
5666                 print "</td>\n" .
5667                       "<td class=\"link\">" .
5668                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5669                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5670                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5671                 my $snapshot_links = format_snapshot_links($commit);
5672                 if (defined $snapshot_links) {
5673                         print " | " . $snapshot_links;
5674                 }
5675                 print "</td>\n" .
5676                       "</tr>\n";
5677         }
5678         if (defined $extra) {
5679                 print "<tr>\n" .
5680                       "<td colspan=\"4\">$extra</td>\n" .
5681                       "</tr>\n";
5682         }
5683         print "</table>\n";
5684 }
5685
5686 sub git_history_body {
5687         # Warning: assumes constant type (blob or tree) during history
5688         my ($commitlist, $from, $to, $refs, $extra,
5689             $file_name, $file_hash, $ftype) = @_;
5690
5691         $from = 0 unless defined $from;
5692         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5693
5694         print "<table class=\"history\">\n";
5695         my $alternate = 1;
5696         for (my $i = $from; $i <= $to; $i++) {
5697                 my %co = %{$commitlist->[$i]};
5698                 if (!%co) {
5699                         next;
5700                 }
5701                 my $commit = $co{'id'};
5702
5703                 my $ref = format_ref_marker($refs, $commit);
5704
5705                 if ($alternate) {
5706                         print "<tr class=\"dark\">\n";
5707                 } else {
5708                         print "<tr class=\"light\">\n";
5709                 }
5710                 $alternate ^= 1;
5711                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5712         # shortlog:   format_author_html('td', \%co, 10)
5713                       format_author_html('td', \%co, 15, 3) . "<td>";
5714                 # originally git_history used chop_str($co{'title'}, 50)
5715                 print format_subject_html($co{'title'}, $co{'title_short'},
5716                                           href(action=>"commit", hash=>$commit), $ref);
5717                 print "</td>\n" .
5718                       "<td class=\"link\">" .
5719                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5720                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5721
5722                 if ($ftype eq 'blob') {
5723                         my $blob_current = $file_hash;
5724                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5725                         if (defined $blob_current && defined $blob_parent &&
5726                                         $blob_current ne $blob_parent) {
5727                                 print " | " .
5728                                         $cgi->a({-href => href(action=>"blobdiff",
5729                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5730                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5731                                                                file_name=>$file_name)},
5732                                                 "diff to current");
5733                         }
5734                 }
5735                 print "</td>\n" .
5736                       "</tr>\n";
5737         }
5738         if (defined $extra) {
5739                 print "<tr>\n" .
5740                       "<td colspan=\"4\">$extra</td>\n" .
5741                       "</tr>\n";
5742         }
5743         print "</table>\n";
5744 }
5745
5746 sub git_tags_body {
5747         # uses global variable $project
5748         my ($taglist, $from, $to, $extra) = @_;
5749         $from = 0 unless defined $from;
5750         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5751
5752         print "<table class=\"tags\">\n";
5753         my $alternate = 1;
5754         for (my $i = $from; $i <= $to; $i++) {
5755                 my $entry = $taglist->[$i];
5756                 my %tag = %$entry;
5757                 my $comment = $tag{'subject'};
5758                 my $comment_short;
5759                 if (defined $comment) {
5760                         $comment_short = chop_str($comment, 30, 5);
5761                 }
5762                 if ($alternate) {
5763                         print "<tr class=\"dark\">\n";
5764                 } else {
5765                         print "<tr class=\"light\">\n";
5766                 }
5767                 $alternate ^= 1;
5768                 if (defined $tag{'age'}) {
5769                         print "<td><i>$tag{'age'}</i></td>\n";
5770                 } else {
5771                         print "<td></td>\n";
5772                 }
5773                 print "<td>" .
5774                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5775                                -class => "list name"}, esc_html($tag{'name'})) .
5776                       "</td>\n" .
5777                       "<td>";
5778                 if (defined $comment) {
5779                         print format_subject_html($comment, $comment_short,
5780                                                   href(action=>"tag", hash=>$tag{'id'}));
5781                 }
5782                 print "</td>\n" .
5783                       "<td class=\"selflink\">";
5784                 if ($tag{'type'} eq "tag") {
5785                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5786                 } else {
5787                         print "&nbsp;";
5788                 }
5789                 print "</td>\n" .
5790                       "<td class=\"link\">" . " | " .
5791                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5792                 if ($tag{'reftype'} eq "commit") {
5793                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5794                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5795                 } elsif ($tag{'reftype'} eq "blob") {
5796                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5797                 }
5798                 print "</td>\n" .
5799                       "</tr>";
5800         }
5801         if (defined $extra) {
5802                 print "<tr>\n" .
5803                       "<td colspan=\"5\">$extra</td>\n" .
5804                       "</tr>\n";
5805         }
5806         print "</table>\n";
5807 }
5808
5809 sub git_heads_body {
5810         # uses global variable $project
5811         my ($headlist, $head_at, $from, $to, $extra) = @_;
5812         $from = 0 unless defined $from;
5813         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5814
5815         print "<table class=\"heads\">\n";
5816         my $alternate = 1;
5817         for (my $i = $from; $i <= $to; $i++) {
5818                 my $entry = $headlist->[$i];
5819                 my %ref = %$entry;
5820                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5821                 if ($alternate) {
5822                         print "<tr class=\"dark\">\n";
5823                 } else {
5824                         print "<tr class=\"light\">\n";
5825                 }
5826                 $alternate ^= 1;
5827                 print "<td><i>$ref{'age'}</i></td>\n" .
5828                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5829                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5830                                -class => "list name"},esc_html($ref{'name'})) .
5831                       "</td>\n" .
5832                       "<td class=\"link\">" .
5833                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5834                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5835                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5836                       "</td>\n" .
5837                       "</tr>";
5838         }
5839         if (defined $extra) {
5840                 print "<tr>\n" .
5841                       "<td colspan=\"3\">$extra</td>\n" .
5842                       "</tr>\n";
5843         }
5844         print "</table>\n";
5845 }
5846
5847 # Display a single remote block
5848 sub git_remote_block {
5849         my ($remote, $rdata, $limit, $head) = @_;
5850
5851         my $heads = $rdata->{'heads'};
5852         my $fetch = $rdata->{'fetch'};
5853         my $push = $rdata->{'push'};
5854
5855         my $urls_table = "<table class=\"projects_list\">\n" ;
5856
5857         if (defined $fetch) {
5858                 if ($fetch eq $push) {
5859                         $urls_table .= format_repo_url("URL", $fetch);
5860                 } else {
5861                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5862                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5863                 }
5864         } elsif (defined $push) {
5865                 $urls_table .= format_repo_url("Push URL", $push);
5866         } else {
5867                 $urls_table .= format_repo_url("", "No remote URL");
5868         }
5869
5870         $urls_table .= "</table>\n";
5871
5872         my $dots;
5873         if (defined $limit && $limit < @$heads) {
5874                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5875         }
5876
5877         print $urls_table;
5878         git_heads_body($heads, $head, 0, $limit, $dots);
5879 }
5880
5881 # Display a list of remote names with the respective fetch and push URLs
5882 sub git_remotes_list {
5883         my ($remotedata, $limit) = @_;
5884         print "<table class=\"heads\">\n";
5885         my $alternate = 1;
5886         my @remotes = sort keys %$remotedata;
5887
5888         my $limited = $limit && $limit < @remotes;
5889
5890         $#remotes = $limit - 1 if $limited;
5891
5892         while (my $remote = shift @remotes) {
5893                 my $rdata = $remotedata->{$remote};
5894                 my $fetch = $rdata->{'fetch'};
5895                 my $push = $rdata->{'push'};
5896                 if ($alternate) {
5897                         print "<tr class=\"dark\">\n";
5898                 } else {
5899                         print "<tr class=\"light\">\n";
5900                 }
5901                 $alternate ^= 1;
5902                 print "<td>" .
5903                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5904                                -class=> "list name"},esc_html($remote)) .
5905                       "</td>";
5906                 print "<td class=\"link\">" .
5907                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5908                       " | " .
5909                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5910                       "</td>";
5911
5912                 print "</tr>\n";
5913         }
5914
5915         if ($limited) {
5916                 print "<tr>\n" .
5917                       "<td colspan=\"3\">" .
5918                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5919                       "</td>\n" . "</tr>\n";
5920         }
5921
5922         print "</table>";
5923 }
5924
5925 # Display remote heads grouped by remote, unless there are too many
5926 # remotes, in which case we only display the remote names
5927 sub git_remotes_body {
5928         my ($remotedata, $limit, $head) = @_;
5929         if ($limit and $limit < keys %$remotedata) {
5930                 git_remotes_list($remotedata, $limit);
5931         } else {
5932                 fill_remote_heads($remotedata);
5933                 while (my ($remote, $rdata) = each %$remotedata) {
5934                         git_print_section({-class=>"remote", -id=>$remote},
5935                                 ["remotes", $remote, $remote], sub {
5936                                         git_remote_block($remote, $rdata, $limit, $head);
5937                                 });
5938                 }
5939         }
5940 }
5941
5942 sub git_search_message {
5943         my %co = @_;
5944
5945         my $greptype;
5946         if ($searchtype eq 'commit') {
5947                 $greptype = "--grep=";
5948         } elsif ($searchtype eq 'author') {
5949                 $greptype = "--author=";
5950         } elsif ($searchtype eq 'committer') {
5951                 $greptype = "--committer=";
5952         }
5953         $greptype .= $searchtext;
5954         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5955                                        $greptype, '--regexp-ignore-case',
5956                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5957
5958         my $paging_nav = '';
5959         if ($page > 0) {
5960                 $paging_nav .=
5961                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5962                                 "first") .
5963                         " &sdot; " .
5964                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5965                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5966         } else {
5967                 $paging_nav .= "first &sdot; prev";
5968         }
5969         my $next_link = '';
5970         if ($#commitlist >= 100) {
5971                 $next_link =
5972                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5973                                  -accesskey => "n", -title => "Alt-n"}, "next");
5974                 $paging_nav .= " &sdot; $next_link";
5975         } else {
5976                 $paging_nav .= " &sdot; next";
5977         }
5978
5979         git_header_html();
5980
5981         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5982         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5983         if ($page == 0 && !@commitlist) {
5984                 print "<p>No match.</p>\n";
5985         } else {
5986                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5987         }
5988
5989         git_footer_html();
5990 }
5991
5992 sub git_search_changes {
5993         my %co = @_;
5994
5995         local $/ = "\n";
5996         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5997                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5998                 ($search_use_regexp ? '--pickaxe-regex' : ())
5999                         or die_error(500, "Open git-log failed");
6000
6001         git_header_html();
6002
6003         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6004         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6005
6006         print "<table class=\"pickaxe search\">\n";
6007         my $alternate = 1;
6008         undef %co;
6009         my @files;
6010         while (my $line = <$fd>) {
6011                 chomp $line;
6012                 next unless $line;
6013
6014                 my %set = parse_difftree_raw_line($line);
6015                 if (defined $set{'commit'}) {
6016                         # finish previous commit
6017                         if (%co) {
6018                                 print "</td>\n" .
6019                                       "<td class=\"link\">" .
6020                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6021                                               "commit") .
6022                                       " | " .
6023                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6024                                                              hash_base=>$co{'id'})},
6025                                               "tree") .
6026                                       "</td>\n" .
6027                                       "</tr>\n";
6028                         }
6029
6030                         if ($alternate) {
6031                                 print "<tr class=\"dark\">\n";
6032                         } else {
6033                                 print "<tr class=\"light\">\n";
6034                         }
6035                         $alternate ^= 1;
6036                         %co = parse_commit($set{'commit'});
6037                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6038                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6039                               "<td><i>$author</i></td>\n" .
6040                               "<td>" .
6041                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6042                                       -class => "list subject"},
6043                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6044                 } elsif (defined $set{'to_id'}) {
6045                         next if ($set{'to_id'} =~ m/^0{40}$/);
6046
6047                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6048                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6049                                       -class => "list"},
6050                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6051                               "<br/>\n";
6052                 }
6053         }
6054         close $fd;
6055
6056         # finish last commit (warning: repetition!)
6057         if (%co) {
6058                 print "</td>\n" .
6059                       "<td class=\"link\">" .
6060                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6061                               "commit") .
6062                       " | " .
6063                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6064                                              hash_base=>$co{'id'})},
6065                               "tree") .
6066                       "</td>\n" .
6067                       "</tr>\n";
6068         }
6069
6070         print "</table>\n";
6071
6072         git_footer_html();
6073 }
6074
6075 sub git_search_files {
6076         my %co = @_;
6077
6078         local $/ = "\n";
6079         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6080                 $search_use_regexp ? ('-E', '-i') : '-F',
6081                 $searchtext, $co{'tree'}
6082                         or die_error(500, "Open git-grep failed");
6083
6084         git_header_html();
6085
6086         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6087         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6088
6089         print "<table class=\"grep_search\">\n";
6090         my $alternate = 1;
6091         my $matches = 0;
6092         my $lastfile = '';
6093         my $file_href;
6094         while (my $line = <$fd>) {
6095                 chomp $line;
6096                 my ($file, $lno, $ltext, $binary);
6097                 last if ($matches++ > 1000);
6098                 if ($line =~ /^Binary file (.+) matches$/) {
6099                         $file = $1;
6100                         $binary = 1;
6101                 } else {
6102                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6103                         $file =~ s/^$co{'tree'}://;
6104                 }
6105                 if ($file ne $lastfile) {
6106                         $lastfile and print "</td></tr>\n";
6107                         if ($alternate++) {
6108                                 print "<tr class=\"dark\">\n";
6109                         } else {
6110                                 print "<tr class=\"light\">\n";
6111                         }
6112                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6113                                           file_name=>$file);
6114                         print "<td class=\"list\">".
6115                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6116                         print "</td><td>\n";
6117                         $lastfile = $file;
6118                 }
6119                 if ($binary) {
6120                         print "<div class=\"binary\">Binary file</div>\n";
6121                 } else {
6122                         $ltext = untabify($ltext);
6123                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6124                                 $ltext = esc_html($1, -nbsp=>1);
6125                                 $ltext .= '<span class="match">';
6126                                 $ltext .= esc_html($2, -nbsp=>1);
6127                                 $ltext .= '</span>';
6128                                 $ltext .= esc_html($3, -nbsp=>1);
6129                         } else {
6130                                 $ltext = esc_html($ltext, -nbsp=>1);
6131                         }
6132                         print "<div class=\"pre\">" .
6133                                 $cgi->a({-href => $file_href.'#l'.$lno,
6134                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6135                                 ' ' .  $ltext . "</div>\n";
6136                 }
6137         }
6138         if ($lastfile) {
6139                 print "</td></tr>\n";
6140                 if ($matches > 1000) {
6141                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6142                 }
6143         } else {
6144                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6145         }
6146         close $fd;
6147
6148         print "</table>\n";
6149
6150         git_footer_html();
6151 }
6152
6153 sub git_search_grep_body {
6154         my ($commitlist, $from, $to, $extra) = @_;
6155         $from = 0 unless defined $from;
6156         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6157
6158         print "<table class=\"commit_search\">\n";
6159         my $alternate = 1;
6160         for (my $i = $from; $i <= $to; $i++) {
6161                 my %co = %{$commitlist->[$i]};
6162                 if (!%co) {
6163                         next;
6164                 }
6165                 my $commit = $co{'id'};
6166                 if ($alternate) {
6167                         print "<tr class=\"dark\">\n";
6168                 } else {
6169                         print "<tr class=\"light\">\n";
6170                 }
6171                 $alternate ^= 1;
6172                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6173                       format_author_html('td', \%co, 15, 5) .
6174                       "<td>" .
6175                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6176                                -class => "list subject"},
6177                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6178                 my $comment = $co{'comment'};
6179                 foreach my $line (@$comment) {
6180                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6181                                 my ($lead, $match, $trail) = ($1, $2, $3);
6182                                 $match = chop_str($match, 70, 5, 'center');
6183                                 my $contextlen = int((80 - length($match))/2);
6184                                 $contextlen = 30 if ($contextlen > 30);
6185                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6186                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6187
6188                                 $lead  = esc_html($lead);
6189                                 $match = esc_html($match);
6190                                 $trail = esc_html($trail);
6191
6192                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6193                         }
6194                 }
6195                 print "</td>\n" .
6196                       "<td class=\"link\">" .
6197                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6198                       " | " .
6199                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6200                       " | " .
6201                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6202                 print "</td>\n" .
6203                       "</tr>\n";
6204         }
6205         if (defined $extra) {
6206                 print "<tr>\n" .
6207                       "<td colspan=\"3\">$extra</td>\n" .
6208                       "</tr>\n";
6209         }
6210         print "</table>\n";
6211 }
6212
6213 ## ======================================================================
6214 ## ======================================================================
6215 ## actions
6216
6217 sub git_project_list {
6218         my $order = $input_params{'order'};
6219         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6220                 die_error(400, "Unknown order parameter");
6221         }
6222
6223         my @list = git_get_projects_list($project_filter, $strict_export);
6224         if (!@list) {
6225                 die_error(404, "No projects found");
6226         }
6227
6228         git_header_html();
6229         if (defined $home_text && -f $home_text) {
6230                 print "<div class=\"index_include\">\n";
6231                 insert_file($home_text);
6232                 print "</div>\n";
6233         }
6234
6235         git_project_search_form($searchtext, $search_use_regexp);
6236         git_project_list_body(\@list, $order);
6237         git_footer_html();
6238 }
6239
6240 sub git_forks {
6241         my $order = $input_params{'order'};
6242         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6243                 die_error(400, "Unknown order parameter");
6244         }
6245
6246         my $filter = $project;
6247         $filter =~ s/\.git$//;
6248         my @list = git_get_projects_list($filter);
6249         if (!@list) {
6250                 die_error(404, "No forks found");
6251         }
6252
6253         git_header_html();
6254         git_print_page_nav('','');
6255         git_print_header_div('summary', "$project forks");
6256         git_project_list_body(\@list, $order);
6257         git_footer_html();
6258 }
6259
6260 sub git_project_index {
6261         my @projects = git_get_projects_list($project_filter, $strict_export);
6262         if (!@projects) {
6263                 die_error(404, "No projects found");
6264         }
6265
6266         print $cgi->header(
6267                 -type => 'text/plain',
6268                 -charset => 'utf-8',
6269                 -content_disposition => 'inline; filename="index.aux"');
6270
6271         foreach my $pr (@projects) {
6272                 if (!exists $pr->{'owner'}) {
6273                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6274                 }
6275
6276                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6277                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6278                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6279                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6280                 $path  =~ s/ /\+/g;
6281                 $owner =~ s/ /\+/g;
6282
6283                 print "$path $owner\n";
6284         }
6285 }
6286
6287 sub git_summary {
6288         my $descr = git_get_project_description($project) || "none";
6289         my %co = parse_commit("HEAD");
6290         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6291         my $head = $co{'id'};
6292         my $remote_heads = gitweb_check_feature('remote_heads');
6293
6294         my $owner = git_get_project_owner($project);
6295
6296         my $refs = git_get_references();
6297         # These get_*_list functions return one more to allow us to see if
6298         # there are more ...
6299         my @taglist  = git_get_tags_list(16);
6300         my @headlist = git_get_heads_list(16);
6301         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6302         my @forklist;
6303         my $check_forks = gitweb_check_feature('forks');
6304
6305         if ($check_forks) {
6306                 # find forks of a project
6307                 my $filter = $project;
6308                 $filter =~ s/\.git$//;
6309                 @forklist = git_get_projects_list($filter);
6310                 # filter out forks of forks
6311                 @forklist = filter_forks_from_projects_list(\@forklist)
6312                         if (@forklist);
6313         }
6314
6315         git_header_html();
6316         git_print_page_nav('summary','', $head);
6317
6318         print "<div class=\"title\">&nbsp;</div>\n";
6319         print "<table class=\"projects_list\">\n" .
6320               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6321               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6322         if (defined $cd{'rfc2822'}) {
6323                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6324                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6325         }
6326
6327         # use per project git URL list in $projectroot/$project/cloneurl
6328         # or make project git URL from git base URL and project name
6329         my $url_tag = "URL";
6330         my @url_list = git_get_project_url_list($project);
6331         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6332         foreach my $git_url (@url_list) {
6333                 next unless $git_url;
6334                 print format_repo_url($url_tag, $git_url);
6335                 $url_tag = "";
6336         }
6337
6338         # Tag cloud
6339         my $show_ctags = gitweb_check_feature('ctags');
6340         if ($show_ctags) {
6341                 my $ctags = git_get_project_ctags($project);
6342                 if (%$ctags) {
6343                         # without ability to add tags, don't show if there are none
6344                         my $cloud = git_populate_project_tagcloud($ctags);
6345                         print "<tr id=\"metadata_ctags\">" .
6346                               "<td>content tags</td>" .
6347                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6348                               "</tr>\n";
6349                 }
6350         }
6351
6352         print "</table>\n";
6353
6354         # If XSS prevention is on, we don't include README.html.
6355         # TODO: Allow a readme in some safe format.
6356         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6357                 print "<div class=\"title\">readme</div>\n" .
6358                       "<div class=\"readme\">\n";
6359                 insert_file("$projectroot/$project/README.html");
6360                 print "\n</div>\n"; # class="readme"
6361         }
6362
6363         # we need to request one more than 16 (0..15) to check if
6364         # those 16 are all
6365         my @commitlist = $head ? parse_commits($head, 17) : ();
6366         if (@commitlist) {
6367                 git_print_header_div('shortlog');
6368                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6369                                   $#commitlist <=  15 ? undef :
6370                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6371         }
6372
6373         if (@taglist) {
6374                 git_print_header_div('tags');
6375                 git_tags_body(\@taglist, 0, 15,
6376                               $#taglist <=  15 ? undef :
6377                               $cgi->a({-href => href(action=>"tags")}, "..."));
6378         }
6379
6380         if (@headlist) {
6381                 git_print_header_div('heads');
6382                 git_heads_body(\@headlist, $head, 0, 15,
6383                                $#headlist <= 15 ? undef :
6384                                $cgi->a({-href => href(action=>"heads")}, "..."));
6385         }
6386
6387         if (%remotedata) {
6388                 git_print_header_div('remotes');
6389                 git_remotes_body(\%remotedata, 15, $head);
6390         }
6391
6392         if (@forklist) {
6393                 git_print_header_div('forks');
6394                 git_project_list_body(\@forklist, 'age', 0, 15,
6395                                       $#forklist <= 15 ? undef :
6396                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6397                                       'no_header');
6398         }
6399
6400         git_footer_html();
6401 }
6402
6403 sub git_tag {
6404         my %tag = parse_tag($hash);
6405
6406         if (! %tag) {
6407                 die_error(404, "Unknown tag object");
6408         }
6409
6410         my $head = git_get_head_hash($project);
6411         git_header_html();
6412         git_print_page_nav('','', $head,undef,$head);
6413         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6414         print "<div class=\"title_text\">\n" .
6415               "<table class=\"object_header\">\n" .
6416               "<tr>\n" .
6417               "<td>object</td>\n" .
6418               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6419                                $tag{'object'}) . "</td>\n" .
6420               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6421                                               $tag{'type'}) . "</td>\n" .
6422               "</tr>\n";
6423         if (defined($tag{'author'})) {
6424                 git_print_authorship_rows(\%tag, 'author');
6425         }
6426         print "</table>\n\n" .
6427               "</div>\n";
6428         print "<div class=\"page_body\">";
6429         my $comment = $tag{'comment'};
6430         foreach my $line (@$comment) {
6431                 chomp $line;
6432                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6433         }
6434         print "</div>\n";
6435         git_footer_html();
6436 }
6437
6438 sub git_blame_common {
6439         my $format = shift || 'porcelain';
6440         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6441                 $format = 'incremental';
6442                 $action = 'blame_incremental'; # for page title etc
6443         }
6444
6445         # permissions
6446         gitweb_check_feature('blame')
6447                 or die_error(403, "Blame view not allowed");
6448
6449         # error checking
6450         die_error(400, "No file name given") unless $file_name;
6451         $hash_base ||= git_get_head_hash($project);
6452         die_error(404, "Couldn't find base commit") unless $hash_base;
6453         my %co = parse_commit($hash_base)
6454                 or die_error(404, "Commit not found");
6455         my $ftype = "blob";
6456         if (!defined $hash) {
6457                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6458                         or die_error(404, "Error looking up file");
6459         } else {
6460                 $ftype = git_get_type($hash);
6461                 if ($ftype !~ "blob") {
6462                         die_error(400, "Object is not a blob");
6463                 }
6464         }
6465
6466         my $fd;
6467         if ($format eq 'incremental') {
6468                 # get file contents (as base)
6469                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6470                         or die_error(500, "Open git-cat-file failed");
6471         } elsif ($format eq 'data') {
6472                 # run git-blame --incremental
6473                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6474                         $hash_base, "--", $file_name
6475                         or die_error(500, "Open git-blame --incremental failed");
6476         } else {
6477                 # run git-blame --porcelain
6478                 open $fd, "-|", git_cmd(), "blame", '-p',
6479                         $hash_base, '--', $file_name
6480                         or die_error(500, "Open git-blame --porcelain failed");
6481         }
6482
6483         # incremental blame data returns early
6484         if ($format eq 'data') {
6485                 print $cgi->header(
6486                         -type=>"text/plain", -charset => "utf-8",
6487                         -status=> "200 OK");
6488                 local $| = 1; # output autoflush
6489                 while (my $line = <$fd>) {
6490                         print to_utf8($line);
6491                 }
6492                 close $fd
6493                         or print "ERROR $!\n";
6494
6495                 print 'END';
6496                 if (defined $t0 && gitweb_check_feature('timed')) {
6497                         print ' '.
6498                               tv_interval($t0, [ gettimeofday() ]).
6499                               ' '.$number_of_git_cmds;
6500                 }
6501                 print "\n";
6502
6503                 return;
6504         }
6505
6506         # page header
6507         git_header_html();
6508         my $formats_nav =
6509                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6510                         "blob") .
6511                 " | ";
6512         if ($format eq 'incremental') {
6513                 $formats_nav .=
6514                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6515                                 "blame") . " (non-incremental)";
6516         } else {
6517                 $formats_nav .=
6518                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6519                                 "blame") . " (incremental)";
6520         }
6521         $formats_nav .=
6522                 " | " .
6523                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6524                         "history") .
6525                 " | " .
6526                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6527                         "HEAD");
6528         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6529         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6530         git_print_page_path($file_name, $ftype, $hash_base);
6531
6532         # page body
6533         if ($format eq 'incremental') {
6534                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6535                       "This page requires JavaScript to run.\n Use ".
6536                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6537                               'this page').
6538                       " instead.\n".
6539                       "</b></center></div>\n</noscript>\n";
6540
6541                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6542         }
6543
6544         print qq!<div class="page_body">\n!;
6545         print qq!<div id="progress_info">... / ...</div>\n!
6546                 if ($format eq 'incremental');
6547         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6548               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6549               qq!<thead>\n!.
6550               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6551               qq!</thead>\n!.
6552               qq!<tbody>\n!;
6553
6554         my @rev_color = qw(light dark);
6555         my $num_colors = scalar(@rev_color);
6556         my $current_color = 0;
6557
6558         if ($format eq 'incremental') {
6559                 my $color_class = $rev_color[$current_color];
6560
6561                 #contents of a file
6562                 my $linenr = 0;
6563         LINE:
6564                 while (my $line = <$fd>) {
6565                         chomp $line;
6566                         $linenr++;
6567
6568                         print qq!<tr id="l$linenr" class="$color_class">!.
6569                               qq!<td class="sha1"><a href=""> </a></td>!.
6570                               qq!<td class="linenr">!.
6571                               qq!<a class="linenr" href="">$linenr</a></td>!;
6572                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6573                         print qq!</tr>\n!;
6574                 }
6575
6576         } else { # porcelain, i.e. ordinary blame
6577                 my %metainfo = (); # saves information about commits
6578
6579                 # blame data
6580         LINE:
6581                 while (my $line = <$fd>) {
6582                         chomp $line;
6583                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6584                         # no <lines in group> for subsequent lines in group of lines
6585                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6586                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6587                         if (!exists $metainfo{$full_rev}) {
6588                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6589                         }
6590                         my $meta = $metainfo{$full_rev};
6591                         my $data;
6592                         while ($data = <$fd>) {
6593                                 chomp $data;
6594                                 last if ($data =~ s/^\t//); # contents of line
6595                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6596                                         $meta->{$1} = $2 unless exists $meta->{$1};
6597                                 }
6598                                 if ($data =~ /^previous /) {
6599                                         $meta->{'nprevious'}++;
6600                                 }
6601                         }
6602                         my $short_rev = substr($full_rev, 0, 8);
6603                         my $author = $meta->{'author'};
6604                         my %date =
6605                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6606                         my $date = $date{'iso-tz'};
6607                         if ($group_size) {
6608                                 $current_color = ($current_color + 1) % $num_colors;
6609                         }
6610                         my $tr_class = $rev_color[$current_color];
6611                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6612                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6613                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6614                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6615                         if ($group_size) {
6616                                 print "<td class=\"sha1\"";
6617                                 print " title=\"". esc_html($author) . ", $date\"";
6618                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6619                                 print ">";
6620                                 print $cgi->a({-href => href(action=>"commit",
6621                                                              hash=>$full_rev,
6622                                                              file_name=>$file_name)},
6623                                               esc_html($short_rev));
6624                                 if ($group_size >= 2) {
6625                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6626                                         if (@author_initials) {
6627                                                 print "<br />" .
6628                                                       esc_html(join('', @author_initials));
6629                                                 #           or join('.', ...)
6630                                         }
6631                                 }
6632                                 print "</td>\n";
6633                         }
6634                         # 'previous' <sha1 of parent commit> <filename at commit>
6635                         if (exists $meta->{'previous'} &&
6636                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6637                                 $meta->{'parent'} = $1;
6638                                 $meta->{'file_parent'} = unquote($2);
6639                         }
6640                         my $linenr_commit =
6641                                 exists($meta->{'parent'}) ?
6642                                 $meta->{'parent'} : $full_rev;
6643                         my $linenr_filename =
6644                                 exists($meta->{'file_parent'}) ?
6645                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6646                         my $blamed = href(action => 'blame',
6647                                           file_name => $linenr_filename,
6648                                           hash_base => $linenr_commit);
6649                         print "<td class=\"linenr\">";
6650                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6651                                         -class => "linenr" },
6652                                       esc_html($lineno));
6653                         print "</td>";
6654                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6655                         print "</tr>\n";
6656                 } # end while
6657
6658         }
6659
6660         # footer
6661         print "</tbody>\n".
6662               "</table>\n"; # class="blame"
6663         print "</div>\n";   # class="blame_body"
6664         close $fd
6665                 or print "Reading blob failed\n";
6666
6667         git_footer_html();
6668 }
6669
6670 sub git_blame {
6671         git_blame_common();
6672 }
6673
6674 sub git_blame_incremental {
6675         git_blame_common('incremental');
6676 }
6677
6678 sub git_blame_data {
6679         git_blame_common('data');
6680 }
6681
6682 sub git_tags {
6683         my $head = git_get_head_hash($project);
6684         git_header_html();
6685         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6686         git_print_header_div('summary', $project);
6687
6688         my @tagslist = git_get_tags_list();
6689         if (@tagslist) {
6690                 git_tags_body(\@tagslist);
6691         }
6692         git_footer_html();
6693 }
6694
6695 sub git_heads {
6696         my $head = git_get_head_hash($project);
6697         git_header_html();
6698         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6699         git_print_header_div('summary', $project);
6700
6701         my @headslist = git_get_heads_list();
6702         if (@headslist) {
6703                 git_heads_body(\@headslist, $head);
6704         }
6705         git_footer_html();
6706 }
6707
6708 # used both for single remote view and for list of all the remotes
6709 sub git_remotes {
6710         gitweb_check_feature('remote_heads')
6711                 or die_error(403, "Remote heads view is disabled");
6712
6713         my $head = git_get_head_hash($project);
6714         my $remote = $input_params{'hash'};
6715
6716         my $remotedata = git_get_remotes_list($remote);
6717         die_error(500, "Unable to get remote information") unless defined $remotedata;
6718
6719         unless (%$remotedata) {
6720                 die_error(404, defined $remote ?
6721                         "Remote $remote not found" :
6722                         "No remotes found");
6723         }
6724
6725         git_header_html(undef, undef, -action_extra => $remote);
6726         git_print_page_nav('', '',  $head, undef, $head,
6727                 format_ref_views($remote ? '' : 'remotes'));
6728
6729         fill_remote_heads($remotedata);
6730         if (defined $remote) {
6731                 git_print_header_div('remotes', "$remote remote for $project");
6732                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6733         } else {
6734                 git_print_header_div('summary', "$project remotes");
6735                 git_remotes_body($remotedata, undef, $head);
6736         }
6737
6738         git_footer_html();
6739 }
6740
6741 sub git_blob_plain {
6742         my $type = shift;
6743         my $expires;
6744
6745         if (!defined $hash) {
6746                 if (defined $file_name) {
6747                         my $base = $hash_base || git_get_head_hash($project);
6748                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6749                                 or die_error(404, "Cannot find file");
6750                 } else {
6751                         die_error(400, "No file name defined");
6752                 }
6753         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6754                 # blobs defined by non-textual hash id's can be cached
6755                 $expires = "+1d";
6756         }
6757
6758         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6759                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6760
6761         # content-type (can include charset)
6762         $type = blob_contenttype($fd, $file_name, $type);
6763
6764         # "save as" filename, even when no $file_name is given
6765         my $save_as = "$hash";
6766         if (defined $file_name) {
6767                 $save_as = $file_name;
6768         } elsif ($type =~ m/^text\//) {
6769                 $save_as .= '.txt';
6770         }
6771
6772         # With XSS prevention on, blobs of all types except a few known safe
6773         # ones are served with "Content-Disposition: attachment" to make sure
6774         # they don't run in our security domain.  For certain image types,
6775         # blob view writes an <img> tag referring to blob_plain view, and we
6776         # want to be sure not to break that by serving the image as an
6777         # attachment (though Firefox 3 doesn't seem to care).
6778         my $sandbox = $prevent_xss &&
6779                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6780
6781         # serve text/* as text/plain
6782         if ($prevent_xss &&
6783             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6784              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6785                 my $rest = $1;
6786                 $rest = defined $rest ? $rest : '';
6787                 $type = "text/plain$rest";
6788         }
6789
6790         print $cgi->header(
6791                 -type => $type,
6792                 -expires => $expires,
6793                 -content_disposition =>
6794                         ($sandbox ? 'attachment' : 'inline')
6795                         . '; filename="' . $save_as . '"');
6796         local $/ = undef;
6797         binmode STDOUT, ':raw';
6798         print <$fd>;
6799         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6800         close $fd;
6801 }
6802
6803 sub git_blob {
6804         my $expires;
6805
6806         if (!defined $hash) {
6807                 if (defined $file_name) {
6808                         my $base = $hash_base || git_get_head_hash($project);
6809                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6810                                 or die_error(404, "Cannot find file");
6811                 } else {
6812                         die_error(400, "No file name defined");
6813                 }
6814         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6815                 # blobs defined by non-textual hash id's can be cached
6816                 $expires = "+1d";
6817         }
6818
6819         my $have_blame = gitweb_check_feature('blame');
6820         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6821                 or die_error(500, "Couldn't cat $file_name, $hash");
6822         my $mimetype = blob_mimetype($fd, $file_name);
6823         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6824         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6825                 close $fd;
6826                 return git_blob_plain($mimetype);
6827         }
6828         # we can have blame only for text/* mimetype
6829         $have_blame &&= ($mimetype =~ m!^text/!);
6830
6831         my $highlight = gitweb_check_feature('highlight');
6832         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6833         $fd = run_highlighter($fd, $highlight, $syntax)
6834                 if $syntax;
6835
6836         git_header_html(undef, $expires);
6837         my $formats_nav = '';
6838         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6839                 if (defined $file_name) {
6840                         if ($have_blame) {
6841                                 $formats_nav .=
6842                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6843                                                 "blame") .
6844                                         " | ";
6845                         }
6846                         $formats_nav .=
6847                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6848                                         "history") .
6849                                 " | " .
6850                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6851                                         "raw") .
6852                                 " | " .
6853                                 $cgi->a({-href => href(action=>"blob",
6854                                                        hash_base=>"HEAD", file_name=>$file_name)},
6855                                         "HEAD");
6856                 } else {
6857                         $formats_nav .=
6858                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6859                                         "raw");
6860                 }
6861                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6862                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6863         } else {
6864                 print "<div class=\"page_nav\">\n" .
6865                       "<br/><br/></div>\n" .
6866                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6867         }
6868         git_print_page_path($file_name, "blob", $hash_base);
6869         print "<div class=\"page_body\">\n";
6870         if ($mimetype =~ m!^image/!) {
6871                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6872                 if ($file_name) {
6873                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6874                 }
6875                 print qq! src="! .
6876                       href(action=>"blob_plain", hash=>$hash,
6877                            hash_base=>$hash_base, file_name=>$file_name) .
6878                       qq!" />\n!;
6879         } else {
6880                 my $nr;
6881                 while (my $line = <$fd>) {
6882                         chomp $line;
6883                         $nr++;
6884                         $line = untabify($line);
6885                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6886                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6887                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6888                 }
6889         }
6890         close $fd
6891                 or print "Reading blob failed.\n";
6892         print "</div>";
6893         git_footer_html();
6894 }
6895
6896 sub git_tree {
6897         if (!defined $hash_base) {
6898                 $hash_base = "HEAD";
6899         }
6900         if (!defined $hash) {
6901                 if (defined $file_name) {
6902                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6903                 } else {
6904                         $hash = $hash_base;
6905                 }
6906         }
6907         die_error(404, "No such tree") unless defined($hash);
6908
6909         my $show_sizes = gitweb_check_feature('show-sizes');
6910         my $have_blame = gitweb_check_feature('blame');
6911
6912         my @entries = ();
6913         {
6914                 local $/ = "\0";
6915                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6916                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6917                         or die_error(500, "Open git-ls-tree failed");
6918                 @entries = map { chomp; $_ } <$fd>;
6919                 close $fd
6920                         or die_error(404, "Reading tree failed");
6921         }
6922
6923         my $refs = git_get_references();
6924         my $ref = format_ref_marker($refs, $hash_base);
6925         git_header_html();
6926         my $basedir = '';
6927         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6928                 my @views_nav = ();
6929                 if (defined $file_name) {
6930                         push @views_nav,
6931                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6932                                         "history"),
6933                                 $cgi->a({-href => href(action=>"tree",
6934                                                        hash_base=>"HEAD", file_name=>$file_name)},
6935                                         "HEAD"),
6936                 }
6937                 my $snapshot_links = format_snapshot_links($hash);
6938                 if (defined $snapshot_links) {
6939                         # FIXME: Should be available when we have no hash base as well.
6940                         push @views_nav, $snapshot_links;
6941                 }
6942                 git_print_page_nav('tree','', $hash_base, undef, undef,
6943                                    join(' | ', @views_nav));
6944                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6945         } else {
6946                 undef $hash_base;
6947                 print "<div class=\"page_nav\">\n";
6948                 print "<br/><br/></div>\n";
6949                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6950         }
6951         if (defined $file_name) {
6952                 $basedir = $file_name;
6953                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6954                         $basedir .= '/';
6955                 }
6956                 git_print_page_path($file_name, 'tree', $hash_base);
6957         }
6958         print "<div class=\"page_body\">\n";
6959         print "<table class=\"tree\">\n";
6960         my $alternate = 1;
6961         # '..' (top directory) link if possible
6962         if (defined $hash_base &&
6963             defined $file_name && $file_name =~ m![^/]+$!) {
6964                 if ($alternate) {
6965                         print "<tr class=\"dark\">\n";
6966                 } else {
6967                         print "<tr class=\"light\">\n";
6968                 }
6969                 $alternate ^= 1;
6970
6971                 my $up = $file_name;
6972                 $up =~ s!/?[^/]+$!!;
6973                 undef $up unless $up;
6974                 # based on git_print_tree_entry
6975                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6976                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6977                 print '<td class="list">';
6978                 print $cgi->a({-href => href(action=>"tree",
6979                                              hash_base=>$hash_base,
6980                                              file_name=>$up)},
6981                               "..");
6982                 print "</td>\n";
6983                 print "<td class=\"link\"></td>\n";
6984
6985                 print "</tr>\n";
6986         }
6987         foreach my $line (@entries) {
6988                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6989
6990                 if ($alternate) {
6991                         print "<tr class=\"dark\">\n";
6992                 } else {
6993                         print "<tr class=\"light\">\n";
6994                 }
6995                 $alternate ^= 1;
6996
6997                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6998
6999                 print "</tr>\n";
7000         }
7001         print "</table>\n" .
7002               "</div>";
7003         git_footer_html();
7004 }
7005
7006 sub snapshot_name {
7007         my ($project, $hash) = @_;
7008
7009         # path/to/project.git  -> project
7010         # path/to/project/.git -> project
7011         my $name = to_utf8($project);
7012         $name =~ s,([^/])/*\.git$,$1,;
7013         $name = basename($name);
7014         # sanitize name
7015         $name =~ s/[[:cntrl:]]/?/g;
7016
7017         my $ver = $hash;
7018         if ($hash =~ /^[0-9a-fA-F]+$/) {
7019                 # shorten SHA-1 hash
7020                 my $full_hash = git_get_full_hash($project, $hash);
7021                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7022                         $ver = git_get_short_hash($project, $hash);
7023                 }
7024         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7025                 # tags don't need shortened SHA-1 hash
7026                 $ver = $1;
7027         } else {
7028                 # branches and other need shortened SHA-1 hash
7029                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7030                         $ver = $1;
7031                 }
7032                 $ver .= '-' . git_get_short_hash($project, $hash);
7033         }
7034         # in case of hierarchical branch names
7035         $ver =~ s!/!.!g;
7036
7037         # name = project-version_string
7038         $name = "$name-$ver";
7039
7040         return wantarray ? ($name, $name) : $name;
7041 }
7042
7043 sub git_snapshot {
7044         my $format = $input_params{'snapshot_format'};
7045         if (!@snapshot_fmts) {
7046                 die_error(403, "Snapshots not allowed");
7047         }
7048         # default to first supported snapshot format
7049         $format ||= $snapshot_fmts[0];
7050         if ($format !~ m/^[a-z0-9]+$/) {
7051                 die_error(400, "Invalid snapshot format parameter");
7052         } elsif (!exists($known_snapshot_formats{$format})) {
7053                 die_error(400, "Unknown snapshot format");
7054         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7055                 die_error(403, "Snapshot format not allowed");
7056         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7057                 die_error(403, "Unsupported snapshot format");
7058         }
7059
7060         my $type = git_get_type("$hash^{}");
7061         if (!$type) {
7062                 die_error(404, 'Object does not exist');
7063         }  elsif ($type eq 'blob') {
7064                 die_error(400, 'Object is not a tree-ish');
7065         }
7066
7067         my ($name, $prefix) = snapshot_name($project, $hash);
7068         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7069         my $cmd = quote_command(
7070                 git_cmd(), 'archive',
7071                 "--format=$known_snapshot_formats{$format}{'format'}",
7072                 "--prefix=$prefix/", $hash);
7073         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7074                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7075         }
7076
7077         $filename =~ s/(["\\])/\\$1/g;
7078         print $cgi->header(
7079                 -type => $known_snapshot_formats{$format}{'type'},
7080                 -content_disposition => 'inline; filename="' . $filename . '"',
7081                 -status => '200 OK');
7082
7083         open my $fd, "-|", $cmd
7084                 or die_error(500, "Execute git-archive failed");
7085         binmode STDOUT, ':raw';
7086         print <$fd>;
7087         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7088         close $fd;
7089 }
7090
7091 sub git_log_generic {
7092         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7093
7094         my $head = git_get_head_hash($project);
7095         if (!defined $base) {
7096                 $base = $head;
7097         }
7098         if (!defined $page) {
7099                 $page = 0;
7100         }
7101         my $refs = git_get_references();
7102
7103         my $commit_hash = $base;
7104         if (defined $parent) {
7105                 $commit_hash = "$parent..$base";
7106         }
7107         my @commitlist =
7108                 parse_commits($commit_hash, 101, (100 * $page),
7109                               defined $file_name ? ($file_name, "--full-history") : ());
7110
7111         my $ftype;
7112         if (!defined $file_hash && defined $file_name) {
7113                 # some commits could have deleted file in question,
7114                 # and not have it in tree, but one of them has to have it
7115                 for (my $i = 0; $i < @commitlist; $i++) {
7116                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7117                         last if defined $file_hash;
7118                 }
7119         }
7120         if (defined $file_hash) {
7121                 $ftype = git_get_type($file_hash);
7122         }
7123         if (defined $file_name && !defined $ftype) {
7124                 die_error(500, "Unknown type of object");
7125         }
7126         my %co;
7127         if (defined $file_name) {
7128                 %co = parse_commit($base)
7129                         or die_error(404, "Unknown commit object");
7130         }
7131
7132
7133         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7134         my $next_link = '';
7135         if ($#commitlist >= 100) {
7136                 $next_link =
7137                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7138                                  -accesskey => "n", -title => "Alt-n"}, "next");
7139         }
7140         my $patch_max = gitweb_get_feature('patches');
7141         if ($patch_max && !defined $file_name) {
7142                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7143                         $paging_nav .= " &sdot; " .
7144                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7145                                         "patches");
7146                 }
7147         }
7148
7149         git_header_html();
7150         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7151         if (defined $file_name) {
7152                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7153         } else {
7154                 git_print_header_div('summary', $project)
7155         }
7156         git_print_page_path($file_name, $ftype, $hash_base)
7157                 if (defined $file_name);
7158
7159         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7160                      $file_name, $file_hash, $ftype);
7161
7162         git_footer_html();
7163 }
7164
7165 sub git_log {
7166         git_log_generic('log', \&git_log_body,
7167                         $hash, $hash_parent);
7168 }
7169
7170 sub git_commit {
7171         $hash ||= $hash_base || "HEAD";
7172         my %co = parse_commit($hash)
7173             or die_error(404, "Unknown commit object");
7174
7175         my $parent  = $co{'parent'};
7176         my $parents = $co{'parents'}; # listref
7177
7178         # we need to prepare $formats_nav before any parameter munging
7179         my $formats_nav;
7180         if (!defined $parent) {
7181                 # --root commitdiff
7182                 $formats_nav .= '(initial)';
7183         } elsif (@$parents == 1) {
7184                 # single parent commit
7185                 $formats_nav .=
7186                         '(parent: ' .
7187                         $cgi->a({-href => href(action=>"commit",
7188                                                hash=>$parent)},
7189                                 esc_html(substr($parent, 0, 7))) .
7190                         ')';
7191         } else {
7192                 # merge commit
7193                 $formats_nav .=
7194                         '(merge: ' .
7195                         join(' ', map {
7196                                 $cgi->a({-href => href(action=>"commit",
7197                                                        hash=>$_)},
7198                                         esc_html(substr($_, 0, 7)));
7199                         } @$parents ) .
7200                         ')';
7201         }
7202         if (gitweb_check_feature('patches') && @$parents <= 1) {
7203                 $formats_nav .= " | " .
7204                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7205                                 "patch");
7206         }
7207
7208         if (!defined $parent) {
7209                 $parent = "--root";
7210         }
7211         my @difftree;
7212         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7213                 @diff_opts,
7214                 (@$parents <= 1 ? $parent : '-c'),
7215                 $hash, "--"
7216                 or die_error(500, "Open git-diff-tree failed");
7217         @difftree = map { chomp; $_ } <$fd>;
7218         close $fd or die_error(404, "Reading git-diff-tree failed");
7219
7220         # non-textual hash id's can be cached
7221         my $expires;
7222         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7223                 $expires = "+1d";
7224         }
7225         my $refs = git_get_references();
7226         my $ref = format_ref_marker($refs, $co{'id'});
7227
7228         git_header_html(undef, $expires);
7229         git_print_page_nav('commit', '',
7230                            $hash, $co{'tree'}, $hash,
7231                            $formats_nav);
7232
7233         if (defined $co{'parent'}) {
7234                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7235         } else {
7236                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7237         }
7238         print "<div class=\"title_text\">\n" .
7239               "<table class=\"object_header\">\n";
7240         git_print_authorship_rows(\%co);
7241         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7242         print "<tr>" .
7243               "<td>tree</td>" .
7244               "<td class=\"sha1\">" .
7245               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7246                        class => "list"}, $co{'tree'}) .
7247               "</td>" .
7248               "<td class=\"link\">" .
7249               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7250                       "tree");
7251         my $snapshot_links = format_snapshot_links($hash);
7252         if (defined $snapshot_links) {
7253                 print " | " . $snapshot_links;
7254         }
7255         print "</td>" .
7256               "</tr>\n";
7257
7258         foreach my $par (@$parents) {
7259                 print "<tr>" .
7260                       "<td>parent</td>" .
7261                       "<td class=\"sha1\">" .
7262                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7263                                class => "list"}, $par) .
7264                       "</td>" .
7265                       "<td class=\"link\">" .
7266                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7267                       " | " .
7268                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7269                       "</td>" .
7270                       "</tr>\n";
7271         }
7272         print "</table>".
7273               "</div>\n";
7274
7275         print "<div class=\"page_body\">\n";
7276         git_print_log($co{'comment'});
7277         print "</div>\n";
7278
7279         git_difftree_body(\@difftree, $hash, @$parents);
7280
7281         git_footer_html();
7282 }
7283
7284 sub git_object {
7285         # object is defined by:
7286         # - hash or hash_base alone
7287         # - hash_base and file_name
7288         my $type;
7289
7290         # - hash or hash_base alone
7291         if ($hash || ($hash_base && !defined $file_name)) {
7292                 my $object_id = $hash || $hash_base;
7293
7294                 open my $fd, "-|", quote_command(
7295                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7296                         or die_error(404, "Object does not exist");
7297                 $type = <$fd>;
7298                 chomp $type;
7299                 close $fd
7300                         or die_error(404, "Object does not exist");
7301
7302         # - hash_base and file_name
7303         } elsif ($hash_base && defined $file_name) {
7304                 $file_name =~ s,/+$,,;
7305
7306                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7307                         or die_error(404, "Base object does not exist");
7308
7309                 # here errors should not hapen
7310                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7311                         or die_error(500, "Open git-ls-tree failed");
7312                 my $line = <$fd>;
7313                 close $fd;
7314
7315                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7316                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7317                         die_error(404, "File or directory for given base does not exist");
7318                 }
7319                 $type = $2;
7320                 $hash = $3;
7321         } else {
7322                 die_error(400, "Not enough information to find object");
7323         }
7324
7325         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7326                                           hash=>$hash, hash_base=>$hash_base,
7327                                           file_name=>$file_name),
7328                              -status => '302 Found');
7329 }
7330
7331 sub git_blobdiff {
7332         my $format = shift || 'html';
7333         my $diff_style = $input_params{'diff_style'} || 'inline';
7334
7335         my $fd;
7336         my @difftree;
7337         my %diffinfo;
7338         my $expires;
7339
7340         # preparing $fd and %diffinfo for git_patchset_body
7341         # new style URI
7342         if (defined $hash_base && defined $hash_parent_base) {
7343                 if (defined $file_name) {
7344                         # read raw output
7345                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7346                                 $hash_parent_base, $hash_base,
7347                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7348                                 or die_error(500, "Open git-diff-tree failed");
7349                         @difftree = map { chomp; $_ } <$fd>;
7350                         close $fd
7351                                 or die_error(404, "Reading git-diff-tree failed");
7352                         @difftree
7353                                 or die_error(404, "Blob diff not found");
7354
7355                 } elsif (defined $hash &&
7356                          $hash =~ /[0-9a-fA-F]{40}/) {
7357                         # try to find filename from $hash
7358
7359                         # read filtered raw output
7360                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7361                                 $hash_parent_base, $hash_base, "--"
7362                                 or die_error(500, "Open git-diff-tree failed");
7363                         @difftree =
7364                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7365                                 # $hash == to_id
7366                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7367                                 map { chomp; $_ } <$fd>;
7368                         close $fd
7369                                 or die_error(404, "Reading git-diff-tree failed");
7370                         @difftree
7371                                 or die_error(404, "Blob diff not found");
7372
7373                 } else {
7374                         die_error(400, "Missing one of the blob diff parameters");
7375                 }
7376
7377                 if (@difftree > 1) {
7378                         die_error(400, "Ambiguous blob diff specification");
7379                 }
7380
7381                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7382                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7383                 $file_name   ||= $diffinfo{'to_file'};
7384
7385                 $hash_parent ||= $diffinfo{'from_id'};
7386                 $hash        ||= $diffinfo{'to_id'};
7387
7388                 # non-textual hash id's can be cached
7389                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7390                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7391                         $expires = '+1d';
7392                 }
7393
7394                 # open patch output
7395                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7396                         '-p', ($format eq 'html' ? "--full-index" : ()),
7397                         $hash_parent_base, $hash_base,
7398                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7399                         or die_error(500, "Open git-diff-tree failed");
7400         }
7401
7402         # old/legacy style URI -- not generated anymore since 1.4.3.
7403         if (!%diffinfo) {
7404                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7405         }
7406
7407         # header
7408         if ($format eq 'html') {
7409                 my $formats_nav =
7410                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7411                                 "raw");
7412                 $formats_nav .= diff_style_nav($diff_style);
7413                 git_header_html(undef, $expires);
7414                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7415                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7416                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7417                 } else {
7418                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7419                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7420                 }
7421                 if (defined $file_name) {
7422                         git_print_page_path($file_name, "blob", $hash_base);
7423                 } else {
7424                         print "<div class=\"page_path\"></div>\n";
7425                 }
7426
7427         } elsif ($format eq 'plain') {
7428                 print $cgi->header(
7429                         -type => 'text/plain',
7430                         -charset => 'utf-8',
7431                         -expires => $expires,
7432                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7433
7434                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7435
7436         } else {
7437                 die_error(400, "Unknown blobdiff format");
7438         }
7439
7440         # patch
7441         if ($format eq 'html') {
7442                 print "<div class=\"page_body\">\n";
7443
7444                 git_patchset_body($fd, $diff_style,
7445                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7446                 close $fd;
7447
7448                 print "</div>\n"; # class="page_body"
7449                 git_footer_html();
7450
7451         } else {
7452                 while (my $line = <$fd>) {
7453                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7454                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7455
7456                         print $line;
7457
7458                         last if $line =~ m!^\+\+\+!;
7459                 }
7460                 local $/ = undef;
7461                 print <$fd>;
7462                 close $fd;
7463         }
7464 }
7465
7466 sub git_blobdiff_plain {
7467         git_blobdiff('plain');
7468 }
7469
7470 # assumes that it is added as later part of already existing navigation,
7471 # so it returns "| foo | bar" rather than just "foo | bar"
7472 sub diff_style_nav {
7473         my ($diff_style, $is_combined) = @_;
7474         $diff_style ||= 'inline';
7475
7476         return "" if ($is_combined);
7477
7478         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7479         my %styles = @styles;
7480         @styles =
7481                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7482
7483         return join '',
7484                 map { " | ".$_ }
7485                 map {
7486                         $_ eq $diff_style ? $styles{$_} :
7487                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7488                 } @styles;
7489 }
7490
7491 sub git_commitdiff {
7492         my %params = @_;
7493         my $format = $params{-format} || 'html';
7494         my $diff_style = $input_params{'diff_style'} || 'inline';
7495
7496         my ($patch_max) = gitweb_get_feature('patches');
7497         if ($format eq 'patch') {
7498                 die_error(403, "Patch view not allowed") unless $patch_max;
7499         }
7500
7501         $hash ||= $hash_base || "HEAD";
7502         my %co = parse_commit($hash)
7503             or die_error(404, "Unknown commit object");
7504
7505         # choose format for commitdiff for merge
7506         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7507                 $hash_parent = '--cc';
7508         }
7509         # we need to prepare $formats_nav before almost any parameter munging
7510         my $formats_nav;
7511         if ($format eq 'html') {
7512                 $formats_nav =
7513                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7514                                 "raw");
7515                 if ($patch_max && @{$co{'parents'}} <= 1) {
7516                         $formats_nav .= " | " .
7517                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7518                                         "patch");
7519                 }
7520                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7521
7522                 if (defined $hash_parent &&
7523                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7524                         # commitdiff with two commits given
7525                         my $hash_parent_short = $hash_parent;
7526                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7527                                 $hash_parent_short = substr($hash_parent, 0, 7);
7528                         }
7529                         $formats_nav .=
7530                                 ' (from';
7531                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7532                                 if ($co{'parents'}[$i] eq $hash_parent) {
7533                                         $formats_nav .= ' parent ' . ($i+1);
7534                                         last;
7535                                 }
7536                         }
7537                         $formats_nav .= ': ' .
7538                                 $cgi->a({-href => href(-replay=>1,
7539                                                        hash=>$hash_parent, hash_base=>undef)},
7540                                         esc_html($hash_parent_short)) .
7541                                 ')';
7542                 } elsif (!$co{'parent'}) {
7543                         # --root commitdiff
7544                         $formats_nav .= ' (initial)';
7545                 } elsif (scalar @{$co{'parents'}} == 1) {
7546                         # single parent commit
7547                         $formats_nav .=
7548                                 ' (parent: ' .
7549                                 $cgi->a({-href => href(-replay=>1,
7550                                                        hash=>$co{'parent'}, hash_base=>undef)},
7551                                         esc_html(substr($co{'parent'}, 0, 7))) .
7552                                 ')';
7553                 } else {
7554                         # merge commit
7555                         if ($hash_parent eq '--cc') {
7556                                 $formats_nav .= ' | ' .
7557                                         $cgi->a({-href => href(-replay=>1,
7558                                                                hash=>$hash, hash_parent=>'-c')},
7559                                                 'combined');
7560                         } else { # $hash_parent eq '-c'
7561                                 $formats_nav .= ' | ' .
7562                                         $cgi->a({-href => href(-replay=>1,
7563                                                                hash=>$hash, hash_parent=>'--cc')},
7564                                                 'compact');
7565                         }
7566                         $formats_nav .=
7567                                 ' (merge: ' .
7568                                 join(' ', map {
7569                                         $cgi->a({-href => href(-replay=>1,
7570                                                                hash=>$_, hash_base=>undef)},
7571                                                 esc_html(substr($_, 0, 7)));
7572                                 } @{$co{'parents'}} ) .
7573                                 ')';
7574                 }
7575         }
7576
7577         my $hash_parent_param = $hash_parent;
7578         if (!defined $hash_parent_param) {
7579                 # --cc for multiple parents, --root for parentless
7580                 $hash_parent_param =
7581                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7582         }
7583
7584         # read commitdiff
7585         my $fd;
7586         my @difftree;
7587         if ($format eq 'html') {
7588                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7589                         "--no-commit-id", "--patch-with-raw", "--full-index",
7590                         $hash_parent_param, $hash, "--"
7591                         or die_error(500, "Open git-diff-tree failed");
7592
7593                 while (my $line = <$fd>) {
7594                         chomp $line;
7595                         # empty line ends raw part of diff-tree output
7596                         last unless $line;
7597                         push @difftree, scalar parse_difftree_raw_line($line);
7598                 }
7599
7600         } elsif ($format eq 'plain') {
7601                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7602                         '-p', $hash_parent_param, $hash, "--"
7603                         or die_error(500, "Open git-diff-tree failed");
7604         } elsif ($format eq 'patch') {
7605                 # For commit ranges, we limit the output to the number of
7606                 # patches specified in the 'patches' feature.
7607                 # For single commits, we limit the output to a single patch,
7608                 # diverging from the git-format-patch default.
7609                 my @commit_spec = ();
7610                 if ($hash_parent) {
7611                         if ($patch_max > 0) {
7612                                 push @commit_spec, "-$patch_max";
7613                         }
7614                         push @commit_spec, '-n', "$hash_parent..$hash";
7615                 } else {
7616                         if ($params{-single}) {
7617                                 push @commit_spec, '-1';
7618                         } else {
7619                                 if ($patch_max > 0) {
7620                                         push @commit_spec, "-$patch_max";
7621                                 }
7622                                 push @commit_spec, "-n";
7623                         }
7624                         push @commit_spec, '--root', $hash;
7625                 }
7626                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7627                         '--encoding=utf8', '--stdout', @commit_spec
7628                         or die_error(500, "Open git-format-patch failed");
7629         } else {
7630                 die_error(400, "Unknown commitdiff format");
7631         }
7632
7633         # non-textual hash id's can be cached
7634         my $expires;
7635         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7636                 $expires = "+1d";
7637         }
7638
7639         # write commit message
7640         if ($format eq 'html') {
7641                 my $refs = git_get_references();
7642                 my $ref = format_ref_marker($refs, $co{'id'});
7643
7644                 git_header_html(undef, $expires);
7645                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7646                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7647                 print "<div class=\"title_text\">\n" .
7648                       "<table class=\"object_header\">\n";
7649                 git_print_authorship_rows(\%co);
7650                 print "</table>".
7651                       "</div>\n";
7652                 print "<div class=\"page_body\">\n";
7653                 if (@{$co{'comment'}} > 1) {
7654                         print "<div class=\"log\">\n";
7655                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7656                         print "</div>\n"; # class="log"
7657                 }
7658
7659         } elsif ($format eq 'plain') {
7660                 my $refs = git_get_references("tags");
7661                 my $tagname = git_get_rev_name_tags($hash);
7662                 my $filename = basename($project) . "-$hash.patch";
7663
7664                 print $cgi->header(
7665                         -type => 'text/plain',
7666                         -charset => 'utf-8',
7667                         -expires => $expires,
7668                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7669                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7670                 print "From: " . to_utf8($co{'author'}) . "\n";
7671                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7672                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7673
7674                 print "X-Git-Tag: $tagname\n" if $tagname;
7675                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7676
7677                 foreach my $line (@{$co{'comment'}}) {
7678                         print to_utf8($line) . "\n";
7679                 }
7680                 print "---\n\n";
7681         } elsif ($format eq 'patch') {
7682                 my $filename = basename($project) . "-$hash.patch";
7683
7684                 print $cgi->header(
7685                         -type => 'text/plain',
7686                         -charset => 'utf-8',
7687                         -expires => $expires,
7688                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7689         }
7690
7691         # write patch
7692         if ($format eq 'html') {
7693                 my $use_parents = !defined $hash_parent ||
7694                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7695                 git_difftree_body(\@difftree, $hash,
7696                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7697                 print "<br/>\n";
7698
7699                 git_patchset_body($fd, $diff_style,
7700                                   \@difftree, $hash,
7701                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7702                 close $fd;
7703                 print "</div>\n"; # class="page_body"
7704                 git_footer_html();
7705
7706         } elsif ($format eq 'plain') {
7707                 local $/ = undef;
7708                 print <$fd>;
7709                 close $fd
7710                         or print "Reading git-diff-tree failed\n";
7711         } elsif ($format eq 'patch') {
7712                 local $/ = undef;
7713                 print <$fd>;
7714                 close $fd
7715                         or print "Reading git-format-patch failed\n";
7716         }
7717 }
7718
7719 sub git_commitdiff_plain {
7720         git_commitdiff(-format => 'plain');
7721 }
7722
7723 # format-patch-style patches
7724 sub git_patch {
7725         git_commitdiff(-format => 'patch', -single => 1);
7726 }
7727
7728 sub git_patches {
7729         git_commitdiff(-format => 'patch');
7730 }
7731
7732 sub git_history {
7733         git_log_generic('history', \&git_history_body,
7734                         $hash_base, $hash_parent_base,
7735                         $file_name, $hash);
7736 }
7737
7738 sub git_search {
7739         $searchtype ||= 'commit';
7740
7741         # check if appropriate features are enabled
7742         gitweb_check_feature('search')
7743                 or die_error(403, "Search is disabled");
7744         if ($searchtype eq 'pickaxe') {
7745                 # pickaxe may take all resources of your box and run for several minutes
7746                 # with every query - so decide by yourself how public you make this feature
7747                 gitweb_check_feature('pickaxe')
7748                         or die_error(403, "Pickaxe search is disabled");
7749         }
7750         if ($searchtype eq 'grep') {
7751                 # grep search might be potentially CPU-intensive, too
7752                 gitweb_check_feature('grep')
7753                         or die_error(403, "Grep search is disabled");
7754         }
7755
7756         if (!defined $searchtext) {
7757                 die_error(400, "Text field is empty");
7758         }
7759         if (!defined $hash) {
7760                 $hash = git_get_head_hash($project);
7761         }
7762         my %co = parse_commit($hash);
7763         if (!%co) {
7764                 die_error(404, "Unknown commit object");
7765         }
7766         if (!defined $page) {
7767                 $page = 0;
7768         }
7769
7770         if ($searchtype eq 'commit' ||
7771             $searchtype eq 'author' ||
7772             $searchtype eq 'committer') {
7773                 git_search_message(%co);
7774         } elsif ($searchtype eq 'pickaxe') {
7775                 git_search_changes(%co);
7776         } elsif ($searchtype eq 'grep') {
7777                 git_search_files(%co);
7778         } else {
7779                 die_error(400, "Unknown search type");
7780         }
7781 }
7782
7783 sub git_search_help {
7784         git_header_html();
7785         git_print_page_nav('','', $hash,$hash,$hash);
7786         print <<EOT;
7787 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7788 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7789 the pattern entered is recognized as the POSIX extended
7790 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7791 insensitive).</p>
7792 <dl>
7793 <dt><b>commit</b></dt>
7794 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7795 EOT
7796         my $have_grep = gitweb_check_feature('grep');
7797         if ($have_grep) {
7798                 print <<EOT;
7799 <dt><b>grep</b></dt>
7800 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7801     a different one) are searched for the given pattern. On large trees, this search can take
7802 a while and put some strain on the server, so please use it with some consideration. Note that
7803 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7804 case-sensitive.</dd>
7805 EOT
7806         }
7807         print <<EOT;
7808 <dt><b>author</b></dt>
7809 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7810 <dt><b>committer</b></dt>
7811 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7812 EOT
7813         my $have_pickaxe = gitweb_check_feature('pickaxe');
7814         if ($have_pickaxe) {
7815                 print <<EOT;
7816 <dt><b>pickaxe</b></dt>
7817 <dd>All commits that caused the string to appear or disappear from any file (changes that
7818 added, removed or "modified" the string) will be listed. This search can take a while and
7819 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7820 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7821 EOT
7822         }
7823         print "</dl>\n";
7824         git_footer_html();
7825 }
7826
7827 sub git_shortlog {
7828         git_log_generic('shortlog', \&git_shortlog_body,
7829                         $hash, $hash_parent);
7830 }
7831
7832 ## ......................................................................
7833 ## feeds (RSS, Atom; OPML)
7834
7835 sub git_feed {
7836         my $format = shift || 'atom';
7837         my $have_blame = gitweb_check_feature('blame');
7838
7839         # Atom: http://www.atomenabled.org/developers/syndication/
7840         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7841         if ($format ne 'rss' && $format ne 'atom') {
7842                 die_error(400, "Unknown web feed format");
7843         }
7844
7845         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7846         my $head = $hash || 'HEAD';
7847         my @commitlist = parse_commits($head, 150, 0, $file_name);
7848
7849         my %latest_commit;
7850         my %latest_date;
7851         my $content_type = "application/$format+xml";
7852         if (defined $cgi->http('HTTP_ACCEPT') &&
7853                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7854                 # browser (feed reader) prefers text/xml
7855                 $content_type = 'text/xml';
7856         }
7857         if (defined($commitlist[0])) {
7858                 %latest_commit = %{$commitlist[0]};
7859                 my $latest_epoch = $latest_commit{'committer_epoch'};
7860                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7861                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7862                 if (defined $if_modified) {
7863                         my $since;
7864                         if (eval { require HTTP::Date; 1; }) {
7865                                 $since = HTTP::Date::str2time($if_modified);
7866                         } elsif (eval { require Time::ParseDate; 1; }) {
7867                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7868                         }
7869                         if (defined $since && $latest_epoch <= $since) {
7870                                 print $cgi->header(
7871                                         -type => $content_type,
7872                                         -charset => 'utf-8',
7873                                         -last_modified => $latest_date{'rfc2822'},
7874                                         -status => '304 Not Modified');
7875                                 return;
7876                         }
7877                 }
7878                 print $cgi->header(
7879                         -type => $content_type,
7880                         -charset => 'utf-8',
7881                         -last_modified => $latest_date{'rfc2822'});
7882         } else {
7883                 print $cgi->header(
7884                         -type => $content_type,
7885                         -charset => 'utf-8');
7886         }
7887
7888         # Optimization: skip generating the body if client asks only
7889         # for Last-Modified date.
7890         return if ($cgi->request_method() eq 'HEAD');
7891
7892         # header variables
7893         my $title = "$site_name - $project/$action";
7894         my $feed_type = 'log';
7895         if (defined $hash) {
7896                 $title .= " - '$hash'";
7897                 $feed_type = 'branch log';
7898                 if (defined $file_name) {
7899                         $title .= " :: $file_name";
7900                         $feed_type = 'history';
7901                 }
7902         } elsif (defined $file_name) {
7903                 $title .= " - $file_name";
7904                 $feed_type = 'history';
7905         }
7906         $title .= " $feed_type";
7907         my $descr = git_get_project_description($project);
7908         if (defined $descr) {
7909                 $descr = esc_html($descr);
7910         } else {
7911                 $descr = "$project " .
7912                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7913                          " feed";
7914         }
7915         my $owner = git_get_project_owner($project);
7916         $owner = esc_html($owner);
7917
7918         #header
7919         my $alt_url;
7920         if (defined $file_name) {
7921                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7922         } elsif (defined $hash) {
7923                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7924         } else {
7925                 $alt_url = href(-full=>1, action=>"summary");
7926         }
7927         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7928         if ($format eq 'rss') {
7929                 print <<XML;
7930 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7931 <channel>
7932 XML
7933                 print "<title>$title</title>\n" .
7934                       "<link>$alt_url</link>\n" .
7935                       "<description>$descr</description>\n" .
7936                       "<language>en</language>\n" .
7937                       # project owner is responsible for 'editorial' content
7938                       "<managingEditor>$owner</managingEditor>\n";
7939                 if (defined $logo || defined $favicon) {
7940                         # prefer the logo to the favicon, since RSS
7941                         # doesn't allow both
7942                         my $img = esc_url($logo || $favicon);
7943                         print "<image>\n" .
7944                               "<url>$img</url>\n" .
7945                               "<title>$title</title>\n" .
7946                               "<link>$alt_url</link>\n" .
7947                               "</image>\n";
7948                 }
7949                 if (%latest_date) {
7950                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7951                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7952                 }
7953                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7954         } elsif ($format eq 'atom') {
7955                 print <<XML;
7956 <feed xmlns="http://www.w3.org/2005/Atom">
7957 XML
7958                 print "<title>$title</title>\n" .
7959                       "<subtitle>$descr</subtitle>\n" .
7960                       '<link rel="alternate" type="text/html" href="' .
7961                       $alt_url . '" />' . "\n" .
7962                       '<link rel="self" type="' . $content_type . '" href="' .
7963                       $cgi->self_url() . '" />' . "\n" .
7964                       "<id>" . href(-full=>1) . "</id>\n" .
7965                       # use project owner for feed author
7966                       "<author><name>$owner</name></author>\n";
7967                 if (defined $favicon) {
7968                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7969                 }
7970                 if (defined $logo) {
7971                         # not twice as wide as tall: 72 x 27 pixels
7972                         print "<logo>" . esc_url($logo) . "</logo>\n";
7973                 }
7974                 if (! %latest_date) {
7975                         # dummy date to keep the feed valid until commits trickle in:
7976                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7977                 } else {
7978                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7979                 }
7980                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7981         }
7982
7983         # contents
7984         for (my $i = 0; $i <= $#commitlist; $i++) {
7985                 my %co = %{$commitlist[$i]};
7986                 my $commit = $co{'id'};
7987                 # we read 150, we always show 30 and the ones more recent than 48 hours
7988                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7989                         last;
7990                 }
7991                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7992
7993                 # get list of changed files
7994                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7995                         $co{'parent'} || "--root",
7996                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7997                         or next;
7998                 my @difftree = map { chomp; $_ } <$fd>;
7999                 close $fd
8000                         or next;
8001
8002                 # print element (entry, item)
8003                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8004                 if ($format eq 'rss') {
8005                         print "<item>\n" .
8006                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8007                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8008                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8009                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8010                               "<link>$co_url</link>\n" .
8011                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8012                               "<content:encoded>" .
8013                               "<![CDATA[\n";
8014                 } elsif ($format eq 'atom') {
8015                         print "<entry>\n" .
8016                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8017                               "<updated>$cd{'iso-8601'}</updated>\n" .
8018                               "<author>\n" .
8019                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8020                         if ($co{'author_email'}) {
8021                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8022                         }
8023                         print "</author>\n" .
8024                               # use committer for contributor
8025                               "<contributor>\n" .
8026                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8027                         if ($co{'committer_email'}) {
8028                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8029                         }
8030                         print "</contributor>\n" .
8031                               "<published>$cd{'iso-8601'}</published>\n" .
8032                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8033                               "<id>$co_url</id>\n" .
8034                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8035                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8036                 }
8037                 my $comment = $co{'comment'};
8038                 print "<pre>\n";
8039                 foreach my $line (@$comment) {
8040                         $line = esc_html($line);
8041                         print "$line\n";
8042                 }
8043                 print "</pre><ul>\n";
8044                 foreach my $difftree_line (@difftree) {
8045                         my %difftree = parse_difftree_raw_line($difftree_line);
8046                         next if !$difftree{'from_id'};
8047
8048                         my $file = $difftree{'file'} || $difftree{'to_file'};
8049
8050                         print "<li>" .
8051                               "[" .
8052                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8053                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8054                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8055                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8056                                       -title => "diff"}, 'D');
8057                         if ($have_blame) {
8058                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8059                                                              file_name=>$file, hash_base=>$commit),
8060                                               -title => "blame"}, 'B');
8061                         }
8062                         # if this is not a feed of a file history
8063                         if (!defined $file_name || $file_name ne $file) {
8064                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8065                                                              file_name=>$file, hash=>$commit),
8066                                               -title => "history"}, 'H');
8067                         }
8068                         $file = esc_path($file);
8069                         print "] ".
8070                               "$file</li>\n";
8071                 }
8072                 if ($format eq 'rss') {
8073                         print "</ul>]]>\n" .
8074                               "</content:encoded>\n" .
8075                               "</item>\n";
8076                 } elsif ($format eq 'atom') {
8077                         print "</ul>\n</div>\n" .
8078                               "</content>\n" .
8079                               "</entry>\n";
8080                 }
8081         }
8082
8083         # end of feed
8084         if ($format eq 'rss') {
8085                 print "</channel>\n</rss>\n";
8086         } elsif ($format eq 'atom') {
8087                 print "</feed>\n";
8088         }
8089 }
8090
8091 sub git_rss {
8092         git_feed('rss');
8093 }
8094
8095 sub git_atom {
8096         git_feed('atom');
8097 }
8098
8099 sub git_opml {
8100         my @list = git_get_projects_list($project_filter, $strict_export);
8101         if (!@list) {
8102                 die_error(404, "No projects found");
8103         }
8104
8105         print $cgi->header(
8106                 -type => 'text/xml',
8107                 -charset => 'utf-8',
8108                 -content_disposition => 'inline; filename="opml.xml"');
8109
8110         my $title = esc_html($site_name);
8111         my $filter = " within subdirectory ";
8112         if (defined $project_filter) {
8113                 $filter .= esc_html($project_filter);
8114         } else {
8115                 $filter = "";
8116         }
8117         print <<XML;
8118 <?xml version="1.0" encoding="utf-8"?>
8119 <opml version="1.0">
8120 <head>
8121   <title>$title OPML Export$filter</title>
8122 </head>
8123 <body>
8124 <outline text="git RSS feeds">
8125 XML
8126
8127         foreach my $pr (@list) {
8128                 my %proj = %$pr;
8129                 my $head = git_get_head_hash($proj{'path'});
8130                 if (!defined $head) {
8131                         next;
8132                 }
8133                 $git_dir = "$projectroot/$proj{'path'}";
8134                 my %co = parse_commit($head);
8135                 if (!%co) {
8136                         next;
8137                 }
8138
8139                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8140                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8141                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8142                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8143         }
8144         print <<XML;
8145 </outline>
8146 </body>
8147 </opml>
8148 XML
8149 }