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