git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # 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} = [ $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = $cgi->param($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                 } elsif (defined $hash_base && defined $file_name) {
1135                         $action = git_get_type("$hash_base:$file_name");
1136                 } elsif (defined $project) {
1137                         $action = 'summary';
1138                 } else {
1139                         $action = 'project_list';
1140                 }
1141         }
1142         if (!defined($actions{$action})) {
1143                 die_error(400, "Unknown action");
1144         }
1145         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1146             !$project) {
1147                 die_error(400, "Project needed");
1148         }
1149         $actions{$action}->();
1150 }
1151
1152 sub reset_timer {
1153         our $t0 = [ gettimeofday() ]
1154                 if defined $t0;
1155         our $number_of_git_cmds = 0;
1156 }
1157
1158 our $first_request = 1;
1159 sub run_request {
1160         reset_timer();
1161
1162         evaluate_uri();
1163         if ($first_request) {
1164                 evaluate_gitweb_config();
1165                 evaluate_git_version();
1166         }
1167         if ($per_request_config) {
1168                 if (ref($per_request_config) eq 'CODE') {
1169                         $per_request_config->();
1170                 } elsif (!$first_request) {
1171                         evaluate_gitweb_config();
1172                 }
1173         }
1174         check_loadavg();
1175
1176         # $projectroot and $projects_list might be set in gitweb config file
1177         $projects_list ||= $projectroot;
1178
1179         evaluate_query_params();
1180         evaluate_path_info();
1181         evaluate_and_validate_params();
1182         evaluate_git_dir();
1183
1184         configure_gitweb_features();
1185
1186         dispatch();
1187 }
1188
1189 our $is_last_request = sub { 1 };
1190 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1191 our $CGI = 'CGI';
1192 our $cgi;
1193 sub configure_as_fcgi {
1194         require CGI::Fast;
1195         our $CGI = 'CGI::Fast';
1196
1197         my $request_number = 0;
1198         # let each child service 100 requests
1199         our $is_last_request = sub { ++$request_number > 100 };
1200 }
1201 sub evaluate_argv {
1202         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1203         configure_as_fcgi()
1204                 if $script_name =~ /\.fcgi$/;
1205
1206         return unless (@ARGV);
1207
1208         require Getopt::Long;
1209         Getopt::Long::GetOptions(
1210                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1211                 'nproc|n=i' => sub {
1212                         my ($arg, $val) = @_;
1213                         return unless eval { require FCGI::ProcManager; 1; };
1214                         my $proc_manager = FCGI::ProcManager->new({
1215                                 n_processes => $val,
1216                         });
1217                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1218                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1219                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1220                 },
1221         );
1222 }
1223
1224 sub run {
1225         evaluate_argv();
1226
1227         $first_request = 1;
1228         $pre_listen_hook->()
1229                 if $pre_listen_hook;
1230
1231  REQUEST:
1232         while ($cgi = $CGI->new()) {
1233                 $pre_dispatch_hook->()
1234                         if $pre_dispatch_hook;
1235
1236                 run_request();
1237
1238                 $post_dispatch_hook->()
1239                         if $post_dispatch_hook;
1240                 $first_request = 0;
1241
1242                 last REQUEST if ($is_last_request->());
1243         }
1244
1245  DONE_GITWEB:
1246         1;
1247 }
1248
1249 run();
1250
1251 if (defined caller) {
1252         # wrapped in a subroutine processing requests,
1253         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1254         return;
1255 } else {
1256         # pure CGI script, serving single request
1257         exit;
1258 }
1259
1260 ## ======================================================================
1261 ## action links
1262
1263 # possible values of extra options
1264 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1265 # -replay => 1      - start from a current view (replay with modifications)
1266 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1267 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1268 sub href {
1269         my %params = @_;
1270         # default is to use -absolute url() i.e. $my_uri
1271         my $href = $params{-full} ? $my_url : $my_uri;
1272
1273         # implicit -replay, must be first of implicit params
1274         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1275
1276         $params{'project'} = $project unless exists $params{'project'};
1277
1278         if ($params{-replay}) {
1279                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1280                         if (!exists $params{$name}) {
1281                                 $params{$name} = $input_params{$name};
1282                         }
1283                 }
1284         }
1285
1286         my $use_pathinfo = gitweb_check_feature('pathinfo');
1287         if (defined $params{'project'} &&
1288             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1289                 # try to put as many parameters as possible in PATH_INFO:
1290                 #   - project name
1291                 #   - action
1292                 #   - hash_parent or hash_parent_base:/file_parent
1293                 #   - hash or hash_base:/filename
1294                 #   - the snapshot_format as an appropriate suffix
1295
1296                 # When the script is the root DirectoryIndex for the domain,
1297                 # $href here would be something like http://gitweb.example.com/
1298                 # Thus, we strip any trailing / from $href, to spare us double
1299                 # slashes in the final URL
1300                 $href =~ s,/$,,;
1301
1302                 # Then add the project name, if present
1303                 $href .= "/".esc_path_info($params{'project'});
1304                 delete $params{'project'};
1305
1306                 # since we destructively absorb parameters, we keep this
1307                 # boolean that remembers if we're handling a snapshot
1308                 my $is_snapshot = $params{'action'} eq 'snapshot';
1309
1310                 # Summary just uses the project path URL, any other action is
1311                 # added to the URL
1312                 if (defined $params{'action'}) {
1313                         $href .= "/".esc_path_info($params{'action'})
1314                                 unless $params{'action'} eq 'summary';
1315                         delete $params{'action'};
1316                 }
1317
1318                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1319                 # stripping nonexistent or useless pieces
1320                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1321                         || $params{'hash_parent'} || $params{'hash'});
1322                 if (defined $params{'hash_base'}) {
1323                         if (defined $params{'hash_parent_base'}) {
1324                                 $href .= esc_path_info($params{'hash_parent_base'});
1325                                 # skip the file_parent if it's the same as the file_name
1326                                 if (defined $params{'file_parent'}) {
1327                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1328                                                 delete $params{'file_parent'};
1329                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1330                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1331                                                 delete $params{'file_parent'};
1332                                         }
1333                                 }
1334                                 $href .= "..";
1335                                 delete $params{'hash_parent'};
1336                                 delete $params{'hash_parent_base'};
1337                         } elsif (defined $params{'hash_parent'}) {
1338                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1339                                 delete $params{'hash_parent'};
1340                         }
1341
1342                         $href .= esc_path_info($params{'hash_base'});
1343                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1344                                 $href .= ":/".esc_path_info($params{'file_name'});
1345                                 delete $params{'file_name'};
1346                         }
1347                         delete $params{'hash'};
1348                         delete $params{'hash_base'};
1349                 } elsif (defined $params{'hash'}) {
1350                         $href .= esc_path_info($params{'hash'});
1351                         delete $params{'hash'};
1352                 }
1353
1354                 # If the action was a snapshot, we can absorb the
1355                 # snapshot_format parameter too
1356                 if ($is_snapshot) {
1357                         my $fmt = $params{'snapshot_format'};
1358                         # snapshot_format should always be defined when href()
1359                         # is called, but just in case some code forgets, we
1360                         # fall back to the default
1361                         $fmt ||= $snapshot_fmts[0];
1362                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1363                         delete $params{'snapshot_format'};
1364                 }
1365         }
1366
1367         # now encode the parameters explicitly
1368         my @result = ();
1369         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1370                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1371                 if (defined $params{$name}) {
1372                         if (ref($params{$name}) eq "ARRAY") {
1373                                 foreach my $par (@{$params{$name}}) {
1374                                         push @result, $symbol . "=" . esc_param($par);
1375                                 }
1376                         } else {
1377                                 push @result, $symbol . "=" . esc_param($params{$name});
1378                         }
1379                 }
1380         }
1381         $href .= "?" . join(';', @result) if scalar @result;
1382
1383         # final transformation: trailing spaces must be escaped (URI-encoded)
1384         $href =~ s/(\s+)$/CGI::escape($1)/e;
1385
1386         if ($params{-anchor}) {
1387                 $href .= "#".esc_param($params{-anchor});
1388         }
1389
1390         return $href;
1391 }
1392
1393
1394 ## ======================================================================
1395 ## validation, quoting/unquoting and escaping
1396
1397 sub validate_action {
1398         my $input = shift || return undef;
1399         return undef unless exists $actions{$input};
1400         return $input;
1401 }
1402
1403 sub validate_project {
1404         my $input = shift || return undef;
1405         if (!validate_pathname($input) ||
1406                 !(-d "$projectroot/$input") ||
1407                 !check_export_ok("$projectroot/$input") ||
1408                 ($strict_export && !project_in_list($input))) {
1409                 return undef;
1410         } else {
1411                 return $input;
1412         }
1413 }
1414
1415 sub validate_pathname {
1416         my $input = shift || return undef;
1417
1418         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1419         # at the beginning, at the end, and between slashes.
1420         # also this catches doubled slashes
1421         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1422                 return undef;
1423         }
1424         # no null characters
1425         if ($input =~ m!\0!) {
1426                 return undef;
1427         }
1428         return $input;
1429 }
1430
1431 sub validate_refname {
1432         my $input = shift || return undef;
1433
1434         # textual hashes are O.K.
1435         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1436                 return $input;
1437         }
1438         # it must be correct pathname
1439         $input = validate_pathname($input)
1440                 or return undef;
1441         # restrictions on ref name according to git-check-ref-format
1442         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1443                 return undef;
1444         }
1445         return $input;
1446 }
1447
1448 # decode sequences of octets in utf8 into Perl's internal form,
1449 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1450 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1451 sub to_utf8 {
1452         my $str = shift;
1453         return undef unless defined $str;
1454
1455         if (utf8::is_utf8($str) || utf8::decode($str)) {
1456                 return $str;
1457         } else {
1458                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1459         }
1460 }
1461
1462 # quote unsafe chars, but keep the slash, even when it's not
1463 # correct, but quoted slashes look too horrible in bookmarks
1464 sub esc_param {
1465         my $str = shift;
1466         return undef unless defined $str;
1467         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1468         $str =~ s/ /\+/g;
1469         return $str;
1470 }
1471
1472 # the quoting rules for path_info fragment are slightly different
1473 sub esc_path_info {
1474         my $str = shift;
1475         return undef unless defined $str;
1476
1477         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1478         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1479
1480         return $str;
1481 }
1482
1483 # quote unsafe chars in whole URL, so some characters cannot be quoted
1484 sub esc_url {
1485         my $str = shift;
1486         return undef unless defined $str;
1487         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1488         $str =~ s/ /\+/g;
1489         return $str;
1490 }
1491
1492 # quote unsafe characters in HTML attributes
1493 sub esc_attr {
1494
1495         # for XHTML conformance escaping '"' to '&quot;' is not enough
1496         return esc_html(@_);
1497 }
1498
1499 # replace invalid utf8 character with SUBSTITUTION sequence
1500 sub esc_html {
1501         my $str = shift;
1502         my %opts = @_;
1503
1504         return undef unless defined $str;
1505
1506         $str = to_utf8($str);
1507         $str = $cgi->escapeHTML($str);
1508         if ($opts{'-nbsp'}) {
1509                 $str =~ s/ /&nbsp;/g;
1510         }
1511         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1512         return $str;
1513 }
1514
1515 # quote control characters and escape filename to HTML
1516 sub esc_path {
1517         my $str = shift;
1518         my %opts = @_;
1519
1520         return undef unless defined $str;
1521
1522         $str = to_utf8($str);
1523         $str = $cgi->escapeHTML($str);
1524         if ($opts{'-nbsp'}) {
1525                 $str =~ s/ /&nbsp;/g;
1526         }
1527         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1528         return $str;
1529 }
1530
1531 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1532 sub sanitize {
1533         my $str = shift;
1534
1535         return undef unless defined $str;
1536
1537         $str = to_utf8($str);
1538         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1539         return $str;
1540 }
1541
1542 # Make control characters "printable", using character escape codes (CEC)
1543 sub quot_cec {
1544         my $cntrl = shift;
1545         my %opts = @_;
1546         my %es = ( # character escape codes, aka escape sequences
1547                 "\t" => '\t',   # tab            (HT)
1548                 "\n" => '\n',   # line feed      (LF)
1549                 "\r" => '\r',   # carrige return (CR)
1550                 "\f" => '\f',   # form feed      (FF)
1551                 "\b" => '\b',   # backspace      (BS)
1552                 "\a" => '\a',   # alarm (bell)   (BEL)
1553                 "\e" => '\e',   # escape         (ESC)
1554                 "\013" => '\v', # vertical tab   (VT)
1555                 "\000" => '\0', # nul character  (NUL)
1556         );
1557         my $chr = ( (exists $es{$cntrl})
1558                     ? $es{$cntrl}
1559                     : sprintf('\%2x', ord($cntrl)) );
1560         if ($opts{-nohtml}) {
1561                 return $chr;
1562         } else {
1563                 return "<span class=\"cntrl\">$chr</span>";
1564         }
1565 }
1566
1567 # Alternatively use unicode control pictures codepoints,
1568 # Unicode "printable representation" (PR)
1569 sub quot_upr {
1570         my $cntrl = shift;
1571         my %opts = @_;
1572
1573         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1574         if ($opts{-nohtml}) {
1575                 return $chr;
1576         } else {
1577                 return "<span class=\"cntrl\">$chr</span>";
1578         }
1579 }
1580
1581 # git may return quoted and escaped filenames
1582 sub unquote {
1583         my $str = shift;
1584
1585         sub unq {
1586                 my $seq = shift;
1587                 my %es = ( # character escape codes, aka escape sequences
1588                         't' => "\t",   # tab            (HT, TAB)
1589                         'n' => "\n",   # newline        (NL)
1590                         'r' => "\r",   # return         (CR)
1591                         'f' => "\f",   # form feed      (FF)
1592                         'b' => "\b",   # backspace      (BS)
1593                         'a' => "\a",   # alarm (bell)   (BEL)
1594                         'e' => "\e",   # escape         (ESC)
1595                         'v' => "\013", # vertical tab   (VT)
1596                 );
1597
1598                 if ($seq =~ m/^[0-7]{1,3}$/) {
1599                         # octal char sequence
1600                         return chr(oct($seq));
1601                 } elsif (exists $es{$seq}) {
1602                         # C escape sequence, aka character escape code
1603                         return $es{$seq};
1604                 }
1605                 # quoted ordinary character
1606                 return $seq;
1607         }
1608
1609         if ($str =~ m/^"(.*)"$/) {
1610                 # needs unquoting
1611                 $str = $1;
1612                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1613         }
1614         return $str;
1615 }
1616
1617 # escape tabs (convert tabs to spaces)
1618 sub untabify {
1619         my $line = shift;
1620
1621         while ((my $pos = index($line, "\t")) != -1) {
1622                 if (my $count = (8 - ($pos % 8))) {
1623                         my $spaces = ' ' x $count;
1624                         $line =~ s/\t/$spaces/;
1625                 }
1626         }
1627
1628         return $line;
1629 }
1630
1631 sub project_in_list {
1632         my $project = shift;
1633         my @list = git_get_projects_list();
1634         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1635 }
1636
1637 ## ----------------------------------------------------------------------
1638 ## HTML aware string manipulation
1639
1640 # Try to chop given string on a word boundary between position
1641 # $len and $len+$add_len. If there is no word boundary there,
1642 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1643 # (marking chopped part) would be longer than given string.
1644 sub chop_str {
1645         my $str = shift;
1646         my $len = shift;
1647         my $add_len = shift || 10;
1648         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1649
1650         # Make sure perl knows it is utf8 encoded so we don't
1651         # cut in the middle of a utf8 multibyte char.
1652         $str = to_utf8($str);
1653
1654         # allow only $len chars, but don't cut a word if it would fit in $add_len
1655         # if it doesn't fit, cut it if it's still longer than the dots we would add
1656         # remove chopped character entities entirely
1657
1658         # when chopping in the middle, distribute $len into left and right part
1659         # return early if chopping wouldn't make string shorter
1660         if ($where eq 'center') {
1661                 return $str if ($len + 5 >= length($str)); # filler is length 5
1662                 $len = int($len/2);
1663         } else {
1664                 return $str if ($len + 4 >= length($str)); # filler is length 4
1665         }
1666
1667         # regexps: ending and beginning with word part up to $add_len
1668         my $endre = qr/.{$len}\w{0,$add_len}/;
1669         my $begre = qr/\w{0,$add_len}.{$len}/;
1670
1671         if ($where eq 'left') {
1672                 $str =~ m/^(.*?)($begre)$/;
1673                 my ($lead, $body) = ($1, $2);
1674                 if (length($lead) > 4) {
1675                         $lead = " ...";
1676                 }
1677                 return "$lead$body";
1678
1679         } elsif ($where eq 'center') {
1680                 $str =~ m/^($endre)(.*)$/;
1681                 my ($left, $str)  = ($1, $2);
1682                 $str =~ m/^(.*?)($begre)$/;
1683                 my ($mid, $right) = ($1, $2);
1684                 if (length($mid) > 5) {
1685                         $mid = " ... ";
1686                 }
1687                 return "$left$mid$right";
1688
1689         } else {
1690                 $str =~ m/^($endre)(.*)$/;
1691                 my $body = $1;
1692                 my $tail = $2;
1693                 if (length($tail) > 4) {
1694                         $tail = "... ";
1695                 }
1696                 return "$body$tail";
1697         }
1698 }
1699
1700 # takes the same arguments as chop_str, but also wraps a <span> around the
1701 # result with a title attribute if it does get chopped. Additionally, the
1702 # string is HTML-escaped.
1703 sub chop_and_escape_str {
1704         my ($str) = @_;
1705
1706         my $chopped = chop_str(@_);
1707         $str = to_utf8($str);
1708         if ($chopped eq $str) {
1709                 return esc_html($chopped);
1710         } else {
1711                 $str =~ s/[[:cntrl:]]/?/g;
1712                 return $cgi->span({-title=>$str}, esc_html($chopped));
1713         }
1714 }
1715
1716 ## ----------------------------------------------------------------------
1717 ## functions returning short strings
1718
1719 # CSS class for given age value (in seconds)
1720 sub age_class {
1721         my $age = shift;
1722
1723         if (!defined $age) {
1724                 return "noage";
1725         } elsif ($age < 60*60*2) {
1726                 return "age0";
1727         } elsif ($age < 60*60*24*2) {
1728                 return "age1";
1729         } else {
1730                 return "age2";
1731         }
1732 }
1733
1734 # convert age in seconds to "nn units ago" string
1735 sub age_string {
1736         my $age = shift;
1737         my $age_str;
1738
1739         if ($age > 60*60*24*365*2) {
1740                 $age_str = (int $age/60/60/24/365);
1741                 $age_str .= " years ago";
1742         } elsif ($age > 60*60*24*(365/12)*2) {
1743                 $age_str = int $age/60/60/24/(365/12);
1744                 $age_str .= " months ago";
1745         } elsif ($age > 60*60*24*7*2) {
1746                 $age_str = int $age/60/60/24/7;
1747                 $age_str .= " weeks ago";
1748         } elsif ($age > 60*60*24*2) {
1749                 $age_str = int $age/60/60/24;
1750                 $age_str .= " days ago";
1751         } elsif ($age > 60*60*2) {
1752                 $age_str = int $age/60/60;
1753                 $age_str .= " hours ago";
1754         } elsif ($age > 60*2) {
1755                 $age_str = int $age/60;
1756                 $age_str .= " min ago";
1757         } elsif ($age > 2) {
1758                 $age_str = int $age;
1759                 $age_str .= " sec ago";
1760         } else {
1761                 $age_str .= " right now";
1762         }
1763         return $age_str;
1764 }
1765
1766 use constant {
1767         S_IFINVALID => 0030000,
1768         S_IFGITLINK => 0160000,
1769 };
1770
1771 # submodule/subproject, a commit object reference
1772 sub S_ISGITLINK {
1773         my $mode = shift;
1774
1775         return (($mode & S_IFMT) == S_IFGITLINK)
1776 }
1777
1778 # convert file mode in octal to symbolic file mode string
1779 sub mode_str {
1780         my $mode = oct shift;
1781
1782         if (S_ISGITLINK($mode)) {
1783                 return 'm---------';
1784         } elsif (S_ISDIR($mode & S_IFMT)) {
1785                 return 'drwxr-xr-x';
1786         } elsif (S_ISLNK($mode)) {
1787                 return 'lrwxrwxrwx';
1788         } elsif (S_ISREG($mode)) {
1789                 # git cares only about the executable bit
1790                 if ($mode & S_IXUSR) {
1791                         return '-rwxr-xr-x';
1792                 } else {
1793                         return '-rw-r--r--';
1794                 };
1795         } else {
1796                 return '----------';
1797         }
1798 }
1799
1800 # convert file mode in octal to file type string
1801 sub file_type {
1802         my $mode = shift;
1803
1804         if ($mode !~ m/^[0-7]+$/) {
1805                 return $mode;
1806         } else {
1807                 $mode = oct $mode;
1808         }
1809
1810         if (S_ISGITLINK($mode)) {
1811                 return "submodule";
1812         } elsif (S_ISDIR($mode & S_IFMT)) {
1813                 return "directory";
1814         } elsif (S_ISLNK($mode)) {
1815                 return "symlink";
1816         } elsif (S_ISREG($mode)) {
1817                 return "file";
1818         } else {
1819                 return "unknown";
1820         }
1821 }
1822
1823 # convert file mode in octal to file type description string
1824 sub file_type_long {
1825         my $mode = shift;
1826
1827         if ($mode !~ m/^[0-7]+$/) {
1828                 return $mode;
1829         } else {
1830                 $mode = oct $mode;
1831         }
1832
1833         if (S_ISGITLINK($mode)) {
1834                 return "submodule";
1835         } elsif (S_ISDIR($mode & S_IFMT)) {
1836                 return "directory";
1837         } elsif (S_ISLNK($mode)) {
1838                 return "symlink";
1839         } elsif (S_ISREG($mode)) {
1840                 if ($mode & S_IXUSR) {
1841                         return "executable";
1842                 } else {
1843                         return "file";
1844                 };
1845         } else {
1846                 return "unknown";
1847         }
1848 }
1849
1850
1851 ## ----------------------------------------------------------------------
1852 ## functions returning short HTML fragments, or transforming HTML fragments
1853 ## which don't belong to other sections
1854
1855 # format line of commit message.
1856 sub format_log_line_html {
1857         my $line = shift;
1858
1859         $line = esc_html($line, -nbsp=>1);
1860         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1861                 $cgi->a({-href => href(action=>"object", hash=>$1),
1862                                         -class => "text"}, $1);
1863         }eg;
1864
1865         return $line;
1866 }
1867
1868 # format marker of refs pointing to given object
1869
1870 # the destination action is chosen based on object type and current context:
1871 # - for annotated tags, we choose the tag view unless it's the current view
1872 #   already, in which case we go to shortlog view
1873 # - for other refs, we keep the current view if we're in history, shortlog or
1874 #   log view, and select shortlog otherwise
1875 sub format_ref_marker {
1876         my ($refs, $id) = @_;
1877         my $markers = '';
1878
1879         if (defined $refs->{$id}) {
1880                 foreach my $ref (@{$refs->{$id}}) {
1881                         # this code exploits the fact that non-lightweight tags are the
1882                         # only indirect objects, and that they are the only objects for which
1883                         # we want to use tag instead of shortlog as action
1884                         my ($type, $name) = qw();
1885                         my $indirect = ($ref =~ s/\^\{\}$//);
1886                         # e.g. tags/v2.6.11 or heads/next
1887                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1888                                 $type = $1;
1889                                 $name = $2;
1890                         } else {
1891                                 $type = "ref";
1892                                 $name = $ref;
1893                         }
1894
1895                         my $class = $type;
1896                         $class .= " indirect" if $indirect;
1897
1898                         my $dest_action = "shortlog";
1899
1900                         if ($indirect) {
1901                                 $dest_action = "tag" unless $action eq "tag";
1902                         } elsif ($action =~ /^(history|(short)?log)$/) {
1903                                 $dest_action = $action;
1904                         }
1905
1906                         my $dest = "";
1907                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1908                         $dest .= $ref;
1909
1910                         my $link = $cgi->a({
1911                                 -href => href(
1912                                         action=>$dest_action,
1913                                         hash=>$dest
1914                                 )}, $name);
1915
1916                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1917                                 $link . "</span>";
1918                 }
1919         }
1920
1921         if ($markers) {
1922                 return ' <span class="refs">'. $markers . '</span>';
1923         } else {
1924                 return "";
1925         }
1926 }
1927
1928 # format, perhaps shortened and with markers, title line
1929 sub format_subject_html {
1930         my ($long, $short, $href, $extra) = @_;
1931         $extra = '' unless defined($extra);
1932
1933         if (length($short) < length($long)) {
1934                 $long =~ s/[[:cntrl:]]/?/g;
1935                 return $cgi->a({-href => $href, -class => "list subject",
1936                                 -title => to_utf8($long)},
1937                        esc_html($short)) . $extra;
1938         } else {
1939                 return $cgi->a({-href => $href, -class => "list subject"},
1940                        esc_html($long)) . $extra;
1941         }
1942 }
1943
1944 # Rather than recomputing the url for an email multiple times, we cache it
1945 # after the first hit. This gives a visible benefit in views where the avatar
1946 # for the same email is used repeatedly (e.g. shortlog).
1947 # The cache is shared by all avatar engines (currently gravatar only), which
1948 # are free to use it as preferred. Since only one avatar engine is used for any
1949 # given page, there's no risk for cache conflicts.
1950 our %avatar_cache = ();
1951
1952 # Compute the picon url for a given email, by using the picon search service over at
1953 # http://www.cs.indiana.edu/picons/search.html
1954 sub picon_url {
1955         my $email = lc shift;
1956         if (!$avatar_cache{$email}) {
1957                 my ($user, $domain) = split('@', $email);
1958                 $avatar_cache{$email} =
1959                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1960                         "$domain/$user/" .
1961                         "users+domains+unknown/up/single";
1962         }
1963         return $avatar_cache{$email};
1964 }
1965
1966 # Compute the gravatar url for a given email, if it's not in the cache already.
1967 # Gravatar stores only the part of the URL before the size, since that's the
1968 # one computationally more expensive. This also allows reuse of the cache for
1969 # different sizes (for this particular engine).
1970 sub gravatar_url {
1971         my $email = lc shift;
1972         my $size = shift;
1973         $avatar_cache{$email} ||=
1974                 "http://www.gravatar.com/avatar/" .
1975                         Digest::MD5::md5_hex($email) . "?s=";
1976         return $avatar_cache{$email} . $size;
1977 }
1978
1979 # Insert an avatar for the given $email at the given $size if the feature
1980 # is enabled.
1981 sub git_get_avatar {
1982         my ($email, %opts) = @_;
1983         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1984         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1985         $opts{-size} ||= 'default';
1986         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1987         my $url = "";
1988         if ($git_avatar eq 'gravatar') {
1989                 $url = gravatar_url($email, $size);
1990         } elsif ($git_avatar eq 'picon') {
1991                 $url = picon_url($email);
1992         }
1993         # Other providers can be added by extending the if chain, defining $url
1994         # as needed. If no variant puts something in $url, we assume avatars
1995         # are completely disabled/unavailable.
1996         if ($url) {
1997                 return $pre_white .
1998                        "<img width=\"$size\" " .
1999                             "class=\"avatar\" " .
2000                             "src=\"".esc_url($url)."\" " .
2001                             "alt=\"\" " .
2002                        "/>" . $post_white;
2003         } else {
2004                 return "";
2005         }
2006 }
2007
2008 sub format_search_author {
2009         my ($author, $searchtype, $displaytext) = @_;
2010         my $have_search = gitweb_check_feature('search');
2011
2012         if ($have_search) {
2013                 my $performed = "";
2014                 if ($searchtype eq 'author') {
2015                         $performed = "authored";
2016                 } elsif ($searchtype eq 'committer') {
2017                         $performed = "committed";
2018                 }
2019
2020                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2021                                 searchtext=>$author,
2022                                 searchtype=>$searchtype), class=>"list",
2023                                 title=>"Search for commits $performed by $author"},
2024                                 $displaytext);
2025
2026         } else {
2027                 return $displaytext;
2028         }
2029 }
2030
2031 # format the author name of the given commit with the given tag
2032 # the author name is chopped and escaped according to the other
2033 # optional parameters (see chop_str).
2034 sub format_author_html {
2035         my $tag = shift;
2036         my $co = shift;
2037         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2038         return "<$tag class=\"author\">" .
2039                format_search_author($co->{'author_name'}, "author",
2040                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2041                        $author) .
2042                "</$tag>";
2043 }
2044
2045 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2046 sub format_git_diff_header_line {
2047         my $line = shift;
2048         my $diffinfo = shift;
2049         my ($from, $to) = @_;
2050
2051         if ($diffinfo->{'nparents'}) {
2052                 # combined diff
2053                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2054                 if ($to->{'href'}) {
2055                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2056                                          esc_path($to->{'file'}));
2057                 } else { # file was deleted (no href)
2058                         $line .= esc_path($to->{'file'});
2059                 }
2060         } else {
2061                 # "ordinary" diff
2062                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2063                 if ($from->{'href'}) {
2064                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2065                                          'a/' . esc_path($from->{'file'}));
2066                 } else { # file was added (no href)
2067                         $line .= 'a/' . esc_path($from->{'file'});
2068                 }
2069                 $line .= ' ';
2070                 if ($to->{'href'}) {
2071                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2072                                          'b/' . esc_path($to->{'file'}));
2073                 } else { # file was deleted
2074                         $line .= 'b/' . esc_path($to->{'file'});
2075                 }
2076         }
2077
2078         return "<div class=\"diff header\">$line</div>\n";
2079 }
2080
2081 # format extended diff header line, before patch itself
2082 sub format_extended_diff_header_line {
2083         my $line = shift;
2084         my $diffinfo = shift;
2085         my ($from, $to) = @_;
2086
2087         # match <path>
2088         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2089                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2090                                        esc_path($from->{'file'}));
2091         }
2092         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2093                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2094                                  esc_path($to->{'file'}));
2095         }
2096         # match single <mode>
2097         if ($line =~ m/\s(\d{6})$/) {
2098                 $line .= '<span class="info"> (' .
2099                          file_type_long($1) .
2100                          ')</span>';
2101         }
2102         # match <hash>
2103         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2104                 # can match only for combined diff
2105                 $line = 'index ';
2106                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2107                         if ($from->{'href'}[$i]) {
2108                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2109                                                   -class=>"hash"},
2110                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2111                         } else {
2112                                 $line .= '0' x 7;
2113                         }
2114                         # separator
2115                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2116                 }
2117                 $line .= '..';
2118                 if ($to->{'href'}) {
2119                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2120                                          substr($diffinfo->{'to_id'},0,7));
2121                 } else {
2122                         $line .= '0' x 7;
2123                 }
2124
2125         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2126                 # can match only for ordinary diff
2127                 my ($from_link, $to_link);
2128                 if ($from->{'href'}) {
2129                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2130                                              substr($diffinfo->{'from_id'},0,7));
2131                 } else {
2132                         $from_link = '0' x 7;
2133                 }
2134                 if ($to->{'href'}) {
2135                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2136                                            substr($diffinfo->{'to_id'},0,7));
2137                 } else {
2138                         $to_link = '0' x 7;
2139                 }
2140                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2141                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2142         }
2143
2144         return $line . "<br/>\n";
2145 }
2146
2147 # format from-file/to-file diff header
2148 sub format_diff_from_to_header {
2149         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2150         my $line;
2151         my $result = '';
2152
2153         $line = $from_line;
2154         #assert($line =~ m/^---/) if DEBUG;
2155         # no extra formatting for "^--- /dev/null"
2156         if (! $diffinfo->{'nparents'}) {
2157                 # ordinary (single parent) diff
2158                 if ($line =~ m!^--- "?a/!) {
2159                         if ($from->{'href'}) {
2160                                 $line = '--- a/' .
2161                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2162                                                 esc_path($from->{'file'}));
2163                         } else {
2164                                 $line = '--- a/' .
2165                                         esc_path($from->{'file'});
2166                         }
2167                 }
2168                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2169
2170         } else {
2171                 # combined diff (merge commit)
2172                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2173                         if ($from->{'href'}[$i]) {
2174                                 $line = '--- ' .
2175                                         $cgi->a({-href=>href(action=>"blobdiff",
2176                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2177                                                              hash_parent_base=>$parents[$i],
2178                                                              file_parent=>$from->{'file'}[$i],
2179                                                              hash=>$diffinfo->{'to_id'},
2180                                                              hash_base=>$hash,
2181                                                              file_name=>$to->{'file'}),
2182                                                  -class=>"path",
2183                                                  -title=>"diff" . ($i+1)},
2184                                                 $i+1) .
2185                                         '/' .
2186                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2187                                                 esc_path($from->{'file'}[$i]));
2188                         } else {
2189                                 $line = '--- /dev/null';
2190                         }
2191                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2192                 }
2193         }
2194
2195         $line = $to_line;
2196         #assert($line =~ m/^\+\+\+/) if DEBUG;
2197         # no extra formatting for "^+++ /dev/null"
2198         if ($line =~ m!^\+\+\+ "?b/!) {
2199                 if ($to->{'href'}) {
2200                         $line = '+++ b/' .
2201                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2202                                         esc_path($to->{'file'}));
2203                 } else {
2204                         $line = '+++ b/' .
2205                                 esc_path($to->{'file'});
2206                 }
2207         }
2208         $result .= qq!<div class="diff to_file">$line</div>\n!;
2209
2210         return $result;
2211 }
2212
2213 # create note for patch simplified by combined diff
2214 sub format_diff_cc_simplified {
2215         my ($diffinfo, @parents) = @_;
2216         my $result = '';
2217
2218         $result .= "<div class=\"diff header\">" .
2219                    "diff --cc ";
2220         if (!is_deleted($diffinfo)) {
2221                 $result .= $cgi->a({-href => href(action=>"blob",
2222                                                   hash_base=>$hash,
2223                                                   hash=>$diffinfo->{'to_id'},
2224                                                   file_name=>$diffinfo->{'to_file'}),
2225                                     -class => "path"},
2226                                    esc_path($diffinfo->{'to_file'}));
2227         } else {
2228                 $result .= esc_path($diffinfo->{'to_file'});
2229         }
2230         $result .= "</div>\n" . # class="diff header"
2231                    "<div class=\"diff nodifferences\">" .
2232                    "Simple merge" .
2233                    "</div>\n"; # class="diff nodifferences"
2234
2235         return $result;
2236 }
2237
2238 sub diff_line_class {
2239         my ($line, $from, $to) = @_;
2240
2241         # ordinary diff
2242         my $num_sign = 1;
2243         # combined diff
2244         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2245                 $num_sign = scalar @{$from->{'href'}};
2246         }
2247
2248         my @diff_line_classifier = (
2249                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2250                 { regexp => qr/^\\/,               class => "incomplete"  },
2251                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2252                 # classifier for context must come before classifier add/rem,
2253                 # or we would have to use more complicated regexp, for example
2254                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2255                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2256                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2257         );
2258         for my $clsfy (@diff_line_classifier) {
2259                 return $clsfy->{'class'}
2260                         if ($line =~ $clsfy->{'regexp'});
2261         }
2262
2263         # fallback
2264         return "";
2265 }
2266
2267 # assumes that $from and $to are defined and correctly filled,
2268 # and that $line holds a line of chunk header for unified diff
2269 sub format_unidiff_chunk_header {
2270         my ($line, $from, $to) = @_;
2271
2272         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2273                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2274
2275         $from_lines = 0 unless defined $from_lines;
2276         $to_lines   = 0 unless defined $to_lines;
2277
2278         if ($from->{'href'}) {
2279                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2280                                      -class=>"list"}, $from_text);
2281         }
2282         if ($to->{'href'}) {
2283                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2284                                      -class=>"list"}, $to_text);
2285         }
2286         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2287                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2288         return $line;
2289 }
2290
2291 # assumes that $from and $to are defined and correctly filled,
2292 # and that $line holds a line of chunk header for combined diff
2293 sub format_cc_diff_chunk_header {
2294         my ($line, $from, $to) = @_;
2295
2296         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2297         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2298
2299         @from_text = split(' ', $ranges);
2300         for (my $i = 0; $i < @from_text; ++$i) {
2301                 ($from_start[$i], $from_nlines[$i]) =
2302                         (split(',', substr($from_text[$i], 1)), 0);
2303         }
2304
2305         $to_text   = pop @from_text;
2306         $to_start  = pop @from_start;
2307         $to_nlines = pop @from_nlines;
2308
2309         $line = "<span class=\"chunk_info\">$prefix ";
2310         for (my $i = 0; $i < @from_text; ++$i) {
2311                 if ($from->{'href'}[$i]) {
2312                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2313                                           -class=>"list"}, $from_text[$i]);
2314                 } else {
2315                         $line .= $from_text[$i];
2316                 }
2317                 $line .= " ";
2318         }
2319         if ($to->{'href'}) {
2320                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2321                                   -class=>"list"}, $to_text);
2322         } else {
2323                 $line .= $to_text;
2324         }
2325         $line .= " $prefix</span>" .
2326                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2327         return $line;
2328 }
2329
2330 # process patch (diff) line (not to be used for diff headers),
2331 # returning class and HTML-formatted (but not wrapped) line
2332 sub process_diff_line {
2333         my $line = shift;
2334         my ($from, $to) = @_;
2335
2336         my $diff_class = diff_line_class($line, $from, $to);
2337
2338         chomp $line;
2339         $line = untabify($line);
2340
2341         if ($from && $to && $line =~ m/^\@{2} /) {
2342                 $line = format_unidiff_chunk_header($line, $from, $to);
2343                 return $diff_class, $line;
2344
2345         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2346                 $line = format_cc_diff_chunk_header($line, $from, $to);
2347                 return $diff_class, $line;
2348
2349         }
2350         return $diff_class, esc_html($line, -nbsp=>1);
2351 }
2352
2353 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2354 # linked.  Pass the hash of the tree/commit to snapshot.
2355 sub format_snapshot_links {
2356         my ($hash) = @_;
2357         my $num_fmts = @snapshot_fmts;
2358         if ($num_fmts > 1) {
2359                 # A parenthesized list of links bearing format names.
2360                 # e.g. "snapshot (_tar.gz_ _zip_)"
2361                 return "snapshot (" . join(' ', map
2362                         $cgi->a({
2363                                 -href => href(
2364                                         action=>"snapshot",
2365                                         hash=>$hash,
2366                                         snapshot_format=>$_
2367                                 )
2368                         }, $known_snapshot_formats{$_}{'display'})
2369                 , @snapshot_fmts) . ")";
2370         } elsif ($num_fmts == 1) {
2371                 # A single "snapshot" link whose tooltip bears the format name.
2372                 # i.e. "_snapshot_"
2373                 my ($fmt) = @snapshot_fmts;
2374                 return
2375                         $cgi->a({
2376                                 -href => href(
2377                                         action=>"snapshot",
2378                                         hash=>$hash,
2379                                         snapshot_format=>$fmt
2380                                 ),
2381                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2382                         }, "snapshot");
2383         } else { # $num_fmts == 0
2384                 return undef;
2385         }
2386 }
2387
2388 ## ......................................................................
2389 ## functions returning values to be passed, perhaps after some
2390 ## transformation, to other functions; e.g. returning arguments to href()
2391
2392 # returns hash to be passed to href to generate gitweb URL
2393 # in -title key it returns description of link
2394 sub get_feed_info {
2395         my $format = shift || 'Atom';
2396         my %res = (action => lc($format));
2397
2398         # feed links are possible only for project views
2399         return unless (defined $project);
2400         # some views should link to OPML, or to generic project feed,
2401         # or don't have specific feed yet (so they should use generic)
2402         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2403
2404         my $branch;
2405         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2406         # from tag links; this also makes possible to detect branch links
2407         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2408             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2409                 $branch = $1;
2410         }
2411         # find log type for feed description (title)
2412         my $type = 'log';
2413         if (defined $file_name) {
2414                 $type  = "history of $file_name";
2415                 $type .= "/" if ($action eq 'tree');
2416                 $type .= " on '$branch'" if (defined $branch);
2417         } else {
2418                 $type = "log of $branch" if (defined $branch);
2419         }
2420
2421         $res{-title} = $type;
2422         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2423         $res{'file_name'} = $file_name;
2424
2425         return %res;
2426 }
2427
2428 ## ----------------------------------------------------------------------
2429 ## git utility subroutines, invoking git commands
2430
2431 # returns path to the core git executable and the --git-dir parameter as list
2432 sub git_cmd {
2433         $number_of_git_cmds++;
2434         return $GIT, '--git-dir='.$git_dir;
2435 }
2436
2437 # quote the given arguments for passing them to the shell
2438 # quote_command("command", "arg 1", "arg with ' and ! characters")
2439 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2440 # Try to avoid using this function wherever possible.
2441 sub quote_command {
2442         return join(' ',
2443                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2444 }
2445
2446 # get HEAD ref of given project as hash
2447 sub git_get_head_hash {
2448         return git_get_full_hash(shift, 'HEAD');
2449 }
2450
2451 sub git_get_full_hash {
2452         return git_get_hash(@_);
2453 }
2454
2455 sub git_get_short_hash {
2456         return git_get_hash(@_, '--short=7');
2457 }
2458
2459 sub git_get_hash {
2460         my ($project, $hash, @options) = @_;
2461         my $o_git_dir = $git_dir;
2462         my $retval = undef;
2463         $git_dir = "$projectroot/$project";
2464         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2465             '--verify', '-q', @options, $hash) {
2466                 $retval = <$fd>;
2467                 chomp $retval if defined $retval;
2468                 close $fd;
2469         }
2470         if (defined $o_git_dir) {
2471                 $git_dir = $o_git_dir;
2472         }
2473         return $retval;
2474 }
2475
2476 # get type of given object
2477 sub git_get_type {
2478         my $hash = shift;
2479
2480         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2481         my $type = <$fd>;
2482         close $fd or return;
2483         chomp $type;
2484         return $type;
2485 }
2486
2487 # repository configuration
2488 our $config_file = '';
2489 our %config;
2490
2491 # store multiple values for single key as anonymous array reference
2492 # single values stored directly in the hash, not as [ <value> ]
2493 sub hash_set_multi {
2494         my ($hash, $key, $value) = @_;
2495
2496         if (!exists $hash->{$key}) {
2497                 $hash->{$key} = $value;
2498         } elsif (!ref $hash->{$key}) {
2499                 $hash->{$key} = [ $hash->{$key}, $value ];
2500         } else {
2501                 push @{$hash->{$key}}, $value;
2502         }
2503 }
2504
2505 # return hash of git project configuration
2506 # optionally limited to some section, e.g. 'gitweb'
2507 sub git_parse_project_config {
2508         my $section_regexp = shift;
2509         my %config;
2510
2511         local $/ = "\0";
2512
2513         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2514                 or return;
2515
2516         while (my $keyval = <$fh>) {
2517                 chomp $keyval;
2518                 my ($key, $value) = split(/\n/, $keyval, 2);
2519
2520                 hash_set_multi(\%config, $key, $value)
2521                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2522         }
2523         close $fh;
2524
2525         return %config;
2526 }
2527
2528 # convert config value to boolean: 'true' or 'false'
2529 # no value, number > 0, 'true' and 'yes' values are true
2530 # rest of values are treated as false (never as error)
2531 sub config_to_bool {
2532         my $val = shift;
2533
2534         return 1 if !defined $val;             # section.key
2535
2536         # strip leading and trailing whitespace
2537         $val =~ s/^\s+//;
2538         $val =~ s/\s+$//;
2539
2540         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2541                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2542 }
2543
2544 # convert config value to simple decimal number
2545 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2546 # to be multiplied by 1024, 1048576, or 1073741824
2547 sub config_to_int {
2548         my $val = shift;
2549
2550         # strip leading and trailing whitespace
2551         $val =~ s/^\s+//;
2552         $val =~ s/\s+$//;
2553
2554         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2555                 $unit = lc($unit);
2556                 # unknown unit is treated as 1
2557                 return $num * ($unit eq 'g' ? 1073741824 :
2558                                $unit eq 'm' ?    1048576 :
2559                                $unit eq 'k' ?       1024 : 1);
2560         }
2561         return $val;
2562 }
2563
2564 # convert config value to array reference, if needed
2565 sub config_to_multi {
2566         my $val = shift;
2567
2568         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2569 }
2570
2571 sub git_get_project_config {
2572         my ($key, $type) = @_;
2573
2574         return unless defined $git_dir;
2575
2576         # key sanity check
2577         return unless ($key);
2578         # only subsection, if exists, is case sensitive,
2579         # and not lowercased by 'git config -z -l'
2580         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2581                 $key = join(".", lc($hi), $mi, lc($lo));
2582         } else {
2583                 $key = lc($key);
2584         }
2585         $key =~ s/^gitweb\.//;
2586         return if ($key =~ m/\W/);
2587
2588         # type sanity check
2589         if (defined $type) {
2590                 $type =~ s/^--//;
2591                 $type = undef
2592                         unless ($type eq 'bool' || $type eq 'int');
2593         }
2594
2595         # get config
2596         if (!defined $config_file ||
2597             $config_file ne "$git_dir/config") {
2598                 %config = git_parse_project_config('gitweb');
2599                 $config_file = "$git_dir/config";
2600         }
2601
2602         # check if config variable (key) exists
2603         return unless exists $config{"gitweb.$key"};
2604
2605         # ensure given type
2606         if (!defined $type) {
2607                 return $config{"gitweb.$key"};
2608         } elsif ($type eq 'bool') {
2609                 # backward compatibility: 'git config --bool' returns true/false
2610                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2611         } elsif ($type eq 'int') {
2612                 return config_to_int($config{"gitweb.$key"});
2613         }
2614         return $config{"gitweb.$key"};
2615 }
2616
2617 # get hash of given path at given ref
2618 sub git_get_hash_by_path {
2619         my $base = shift;
2620         my $path = shift || return undef;
2621         my $type = shift;
2622
2623         $path =~ s,/+$,,;
2624
2625         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2626                 or die_error(500, "Open git-ls-tree failed");
2627         my $line = <$fd>;
2628         close $fd or return undef;
2629
2630         if (!defined $line) {
2631                 # there is no tree or hash given by $path at $base
2632                 return undef;
2633         }
2634
2635         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2636         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2637         if (defined $type && $type ne $2) {
2638                 # type doesn't match
2639                 return undef;
2640         }
2641         return $3;
2642 }
2643
2644 # get path of entry with given hash at given tree-ish (ref)
2645 # used to get 'from' filename for combined diff (merge commit) for renames
2646 sub git_get_path_by_hash {
2647         my $base = shift || return;
2648         my $hash = shift || return;
2649
2650         local $/ = "\0";
2651
2652         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2653                 or return undef;
2654         while (my $line = <$fd>) {
2655                 chomp $line;
2656
2657                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2658                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2659                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2660                         close $fd;
2661                         return $1;
2662                 }
2663         }
2664         close $fd;
2665         return undef;
2666 }
2667
2668 ## ......................................................................
2669 ## git utility functions, directly accessing git repository
2670
2671 # get the value of config variable either from file named as the variable
2672 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2673 # configuration variable in the repository config file.
2674 sub git_get_file_or_project_config {
2675         my ($path, $name) = @_;
2676
2677         $git_dir = "$projectroot/$path";
2678         open my $fd, '<', "$git_dir/$name"
2679                 or return git_get_project_config($name);
2680         my $conf = <$fd>;
2681         close $fd;
2682         if (defined $conf) {
2683                 chomp $conf;
2684         }
2685         return $conf;
2686 }
2687
2688 sub git_get_project_description {
2689         my $path = shift;
2690         return git_get_file_or_project_config($path, 'description');
2691 }
2692
2693 sub git_get_project_category {
2694         my $path = shift;
2695         return git_get_file_or_project_config($path, 'category');
2696 }
2697
2698
2699 # supported formats:
2700 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2701 #   - if its contents is a number, use it as tag weight,
2702 #   - otherwise add a tag with weight 1
2703 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2704 #   the same value multiple times increases tag weight
2705 # * `gitweb.ctag' multi-valued repo config variable
2706 sub git_get_project_ctags {
2707         my $project = shift;
2708         my $ctags = {};
2709
2710         $git_dir = "$projectroot/$project";
2711         if (opendir my $dh, "$git_dir/ctags") {
2712                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2713                 foreach my $tagfile (@files) {
2714                         open my $ct, '<', $tagfile
2715                                 or next;
2716                         my $val = <$ct>;
2717                         chomp $val if $val;
2718                         close $ct;
2719
2720                         (my $ctag = $tagfile) =~ s#.*/##;
2721                         if ($val =~ /^\d+$/) {
2722                                 $ctags->{$ctag} = $val;
2723                         } else {
2724                                 $ctags->{$ctag} = 1;
2725                         }
2726                 }
2727                 closedir $dh;
2728
2729         } elsif (open my $fh, '<', "$git_dir/ctags") {
2730                 while (my $line = <$fh>) {
2731                         chomp $line;
2732                         $ctags->{$line}++ if $line;
2733                 }
2734                 close $fh;
2735
2736         } else {
2737                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2738                 foreach my $tag (@$taglist) {
2739                         $ctags->{$tag}++;
2740                 }
2741         }
2742
2743         return $ctags;
2744 }
2745
2746 # return hash, where keys are content tags ('ctags'),
2747 # and values are sum of weights of given tag in every project
2748 sub git_gather_all_ctags {
2749         my $projects = shift;
2750         my $ctags = {};
2751
2752         foreach my $p (@$projects) {
2753                 foreach my $ct (keys %{$p->{'ctags'}}) {
2754                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2755                 }
2756         }
2757
2758         return $ctags;
2759 }
2760
2761 sub git_populate_project_tagcloud {
2762         my $ctags = shift;
2763
2764         # First, merge different-cased tags; tags vote on casing
2765         my %ctags_lc;
2766         foreach (keys %$ctags) {
2767                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2768                 if (not $ctags_lc{lc $_}->{topcount}
2769                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2770                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2771                         $ctags_lc{lc $_}->{topname} = $_;
2772                 }
2773         }
2774
2775         my $cloud;
2776         my $matched = $cgi->param('by_tag');
2777         if (eval { require HTML::TagCloud; 1; }) {
2778                 $cloud = HTML::TagCloud->new;
2779                 foreach my $ctag (sort keys %ctags_lc) {
2780                         # Pad the title with spaces so that the cloud looks
2781                         # less crammed.
2782                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2783                         $title =~ s/ /&nbsp;/g;
2784                         $title =~ s/^/&nbsp;/g;
2785                         $title =~ s/$/&nbsp;/g;
2786                         if (defined $matched && $matched eq $ctag) {
2787                                 $title = qq(<span class="match">$title</span>);
2788                         }
2789                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2790                                     $ctags_lc{$ctag}->{count});
2791                 }
2792         } else {
2793                 $cloud = {};
2794                 foreach my $ctag (keys %ctags_lc) {
2795                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2796                         if (defined $matched && $matched eq $ctag) {
2797                                 $title = qq(<span class="match">$title</span>);
2798                         }
2799                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2800                         $cloud->{$ctag}{ctag} =
2801                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2802                 }
2803         }
2804         return $cloud;
2805 }
2806
2807 sub git_show_project_tagcloud {
2808         my ($cloud, $count) = @_;
2809         if (ref $cloud eq 'HTML::TagCloud') {
2810                 return $cloud->html_and_css($count);
2811         } else {
2812                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2813                 return
2814                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2815                         join (', ', map {
2816                                 $cloud->{$_}->{'ctag'}
2817                         } splice(@tags, 0, $count)) .
2818                         '</div>';
2819         }
2820 }
2821
2822 sub git_get_project_url_list {
2823         my $path = shift;
2824
2825         $git_dir = "$projectroot/$path";
2826         open my $fd, '<', "$git_dir/cloneurl"
2827                 or return wantarray ?
2828                 @{ config_to_multi(git_get_project_config('url')) } :
2829                    config_to_multi(git_get_project_config('url'));
2830         my @git_project_url_list = map { chomp; $_ } <$fd>;
2831         close $fd;
2832
2833         return wantarray ? @git_project_url_list : \@git_project_url_list;
2834 }
2835
2836 sub git_get_projects_list {
2837         my $filter = shift || '';
2838         my $paranoid = shift;
2839         my @list;
2840
2841         if (-d $projects_list) {
2842                 # search in directory
2843                 my $dir = $projects_list;
2844                 # remove the trailing "/"
2845                 $dir =~ s!/+$!!;
2846                 my $pfxlen = length("$dir");
2847                 my $pfxdepth = ($dir =~ tr!/!!);
2848                 # when filtering, search only given subdirectory
2849                 if ($filter && !$paranoid) {
2850                         $dir .= "/$filter";
2851                         $dir =~ s!/+$!!;
2852                 }
2853
2854                 File::Find::find({
2855                         follow_fast => 1, # follow symbolic links
2856                         follow_skip => 2, # ignore duplicates
2857                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2858                         wanted => sub {
2859                                 # global variables
2860                                 our $project_maxdepth;
2861                                 our $projectroot;
2862                                 # skip project-list toplevel, if we get it.
2863                                 return if (m!^[/.]$!);
2864                                 # only directories can be git repositories
2865                                 return unless (-d $_);
2866                                 # don't traverse too deep (Find is super slow on os x)
2867                                 # $project_maxdepth excludes depth of $projectroot
2868                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2869                                         $File::Find::prune = 1;
2870                                         return;
2871                                 }
2872
2873                                 my $path = substr($File::Find::name, $pfxlen + 1);
2874                                 # paranoidly only filter here
2875                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2876                                         next;
2877                                 }
2878                                 # we check related file in $projectroot
2879                                 if (check_export_ok("$projectroot/$path")) {
2880                                         push @list, { path => $path };
2881                                         $File::Find::prune = 1;
2882                                 }
2883                         },
2884                 }, "$dir");
2885
2886         } elsif (-f $projects_list) {
2887                 # read from file(url-encoded):
2888                 # 'git%2Fgit.git Linus+Torvalds'
2889                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2890                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2891                 open my $fd, '<', $projects_list or return;
2892         PROJECT:
2893                 while (my $line = <$fd>) {
2894                         chomp $line;
2895                         my ($path, $owner) = split ' ', $line;
2896                         $path = unescape($path);
2897                         $owner = unescape($owner);
2898                         if (!defined $path) {
2899                                 next;
2900                         }
2901                         # if $filter is rpovided, check if $path begins with $filter
2902                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2903                                 next;
2904                         }
2905                         if (check_export_ok("$projectroot/$path")) {
2906                                 my $pr = {
2907                                         path => $path,
2908                                         owner => to_utf8($owner),
2909                                 };
2910                                 push @list, $pr;
2911                         }
2912                 }
2913                 close $fd;
2914         }
2915         return @list;
2916 }
2917
2918 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2919 # as side effects it sets 'forks' field to list of forks for forked projects
2920 sub filter_forks_from_projects_list {
2921         my $projects = shift;
2922
2923         my %trie; # prefix tree of directories (path components)
2924         # generate trie out of those directories that might contain forks
2925         foreach my $pr (@$projects) {
2926                 my $path = $pr->{'path'};
2927                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2928                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2929                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2930                 next unless (-d "$projectroot/$path"); # containing directory exists
2931                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2932
2933                 # add to trie
2934                 my @dirs = split('/', $path);
2935                 # walk the trie, until either runs out of components or out of trie
2936                 my $ref = \%trie;
2937                 while (scalar @dirs &&
2938                        exists($ref->{$dirs[0]})) {
2939                         $ref = $ref->{shift @dirs};
2940                 }
2941                 # create rest of trie structure from rest of components
2942                 foreach my $dir (@dirs) {
2943                         $ref = $ref->{$dir} = {};
2944                 }
2945                 # create end marker, store $pr as a data
2946                 $ref->{''} = $pr if (!exists $ref->{''});
2947         }
2948
2949         # filter out forks, by finding shortest prefix match for paths
2950         my @filtered;
2951  PROJECT:
2952         foreach my $pr (@$projects) {
2953                 # trie lookup
2954                 my $ref = \%trie;
2955         DIR:
2956                 foreach my $dir (split('/', $pr->{'path'})) {
2957                         if (exists $ref->{''}) {
2958                                 # found [shortest] prefix, is a fork - skip it
2959                                 push @{$ref->{''}{'forks'}}, $pr;
2960                                 next PROJECT;
2961                         }
2962                         if (!exists $ref->{$dir}) {
2963                                 # not in trie, cannot have prefix, not a fork
2964                                 push @filtered, $pr;
2965                                 next PROJECT;
2966                         }
2967                         # If the dir is there, we just walk one step down the trie.
2968                         $ref = $ref->{$dir};
2969                 }
2970                 # we ran out of trie
2971                 # (shouldn't happen: it's either no match, or end marker)
2972                 push @filtered, $pr;
2973         }
2974
2975         return @filtered;
2976 }
2977
2978 # note: fill_project_list_info must be run first,
2979 # for 'descr_long' and 'ctags' to be filled
2980 sub search_projects_list {
2981         my ($projlist, %opts) = @_;
2982         my $tagfilter  = $opts{'tagfilter'};
2983         my $searchtext = $opts{'searchtext'};
2984
2985         return @$projlist
2986                 unless ($tagfilter || $searchtext);
2987
2988         my @projects;
2989  PROJECT:
2990         foreach my $pr (@$projlist) {
2991
2992                 if ($tagfilter) {
2993                         next unless ref($pr->{'ctags'}) eq 'HASH';
2994                         next unless
2995                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2996                 }
2997
2998                 if ($searchtext) {
2999                         next unless
3000                                 $pr->{'path'} =~ /$searchtext/ ||
3001                                 $pr->{'descr_long'} =~ /$searchtext/;
3002                 }
3003
3004                 push @projects, $pr;
3005         }
3006
3007         return @projects;
3008 }
3009
3010 our $gitweb_project_owner = undef;
3011 sub git_get_project_list_from_file {
3012
3013         return if (defined $gitweb_project_owner);
3014
3015         $gitweb_project_owner = {};
3016         # read from file (url-encoded):
3017         # 'git%2Fgit.git Linus+Torvalds'
3018         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3019         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3020         if (-f $projects_list) {
3021                 open(my $fd, '<', $projects_list);
3022                 while (my $line = <$fd>) {
3023                         chomp $line;
3024                         my ($pr, $ow) = split ' ', $line;
3025                         $pr = unescape($pr);
3026                         $ow = unescape($ow);
3027                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3028                 }
3029                 close $fd;
3030         }
3031 }
3032
3033 sub git_get_project_owner {
3034         my $project = shift;
3035         my $owner;
3036
3037         return undef unless $project;
3038         $git_dir = "$projectroot/$project";
3039
3040         if (!defined $gitweb_project_owner) {
3041                 git_get_project_list_from_file();
3042         }
3043
3044         if (exists $gitweb_project_owner->{$project}) {
3045                 $owner = $gitweb_project_owner->{$project};
3046         }
3047         if (!defined $owner){
3048                 $owner = git_get_project_config('owner');
3049         }
3050         if (!defined $owner) {
3051                 $owner = get_file_owner("$git_dir");
3052         }
3053
3054         return $owner;
3055 }
3056
3057 sub git_get_last_activity {
3058         my ($path) = @_;
3059         my $fd;
3060
3061         $git_dir = "$projectroot/$path";
3062         open($fd, "-|", git_cmd(), 'for-each-ref',
3063              '--format=%(committer)',
3064              '--sort=-committerdate',
3065              '--count=1',
3066              'refs/heads') or return;
3067         my $most_recent = <$fd>;
3068         close $fd or return;
3069         if (defined $most_recent &&
3070             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3071                 my $timestamp = $1;
3072                 my $age = time - $timestamp;
3073                 return ($age, age_string($age));
3074         }
3075         return (undef, undef);
3076 }
3077
3078 # Implementation note: when a single remote is wanted, we cannot use 'git
3079 # remote show -n' because that command always work (assuming it's a remote URL
3080 # if it's not defined), and we cannot use 'git remote show' because that would
3081 # try to make a network roundtrip. So the only way to find if that particular
3082 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3083 # and when we find what we want.
3084 sub git_get_remotes_list {
3085         my $wanted = shift;
3086         my %remotes = ();
3087
3088         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3089         return unless $fd;
3090         while (my $remote = <$fd>) {
3091                 chomp $remote;
3092                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3093                 next if $wanted and not $remote eq $wanted;
3094                 my ($url, $key) = ($1, $2);
3095
3096                 $remotes{$remote} ||= { 'heads' => () };
3097                 $remotes{$remote}{$key} = $url;
3098         }
3099         close $fd or return;
3100         return wantarray ? %remotes : \%remotes;
3101 }
3102
3103 # Takes a hash of remotes as first parameter and fills it by adding the
3104 # available remote heads for each of the indicated remotes.
3105 sub fill_remote_heads {
3106         my $remotes = shift;
3107         my @heads = map { "remotes/$_" } keys %$remotes;
3108         my @remoteheads = git_get_heads_list(undef, @heads);
3109         foreach my $remote (keys %$remotes) {
3110                 $remotes->{$remote}{'heads'} = [ grep {
3111                         $_->{'name'} =~ s!^$remote/!!
3112                         } @remoteheads ];
3113         }
3114 }
3115
3116 sub git_get_references {
3117         my $type = shift || "";
3118         my %refs;
3119         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3120         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3121         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3122                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3123                 or return;
3124
3125         while (my $line = <$fd>) {
3126                 chomp $line;
3127                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3128                         if (defined $refs{$1}) {
3129                                 push @{$refs{$1}}, $2;
3130                         } else {
3131                                 $refs{$1} = [ $2 ];
3132                         }
3133                 }
3134         }
3135         close $fd or return;
3136         return \%refs;
3137 }
3138
3139 sub git_get_rev_name_tags {
3140         my $hash = shift || return undef;
3141
3142         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3143                 or return;
3144         my $name_rev = <$fd>;
3145         close $fd;
3146
3147         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3148                 return $1;
3149         } else {
3150                 # catches also '$hash undefined' output
3151                 return undef;
3152         }
3153 }
3154
3155 ## ----------------------------------------------------------------------
3156 ## parse to hash functions
3157
3158 sub parse_date {
3159         my $epoch = shift;
3160         my $tz = shift || "-0000";
3161
3162         my %date;
3163         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3164         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3165         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3166         $date{'hour'} = $hour;
3167         $date{'minute'} = $min;
3168         $date{'mday'} = $mday;
3169         $date{'day'} = $days[$wday];
3170         $date{'month'} = $months[$mon];
3171         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3172                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3173         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3174                              $mday, $months[$mon], $hour ,$min;
3175         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3176                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3177
3178         my ($tz_sign, $tz_hour, $tz_min) =
3179                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3180         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3181         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3182         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3183         $date{'hour_local'} = $hour;
3184         $date{'minute_local'} = $min;
3185         $date{'tz_local'} = $tz;
3186         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3187                                   1900+$year, $mon+1, $mday,
3188                                   $hour, $min, $sec, $tz);
3189         return %date;
3190 }
3191
3192 sub parse_tag {
3193         my $tag_id = shift;
3194         my %tag;
3195         my @comment;
3196
3197         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3198         $tag{'id'} = $tag_id;
3199         while (my $line = <$fd>) {
3200                 chomp $line;
3201                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3202                         $tag{'object'} = $1;
3203                 } elsif ($line =~ m/^type (.+)$/) {
3204                         $tag{'type'} = $1;
3205                 } elsif ($line =~ m/^tag (.+)$/) {
3206                         $tag{'name'} = $1;
3207                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3208                         $tag{'author'} = $1;
3209                         $tag{'author_epoch'} = $2;
3210                         $tag{'author_tz'} = $3;
3211                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3212                                 $tag{'author_name'}  = $1;
3213                                 $tag{'author_email'} = $2;
3214                         } else {
3215                                 $tag{'author_name'} = $tag{'author'};
3216                         }
3217                 } elsif ($line =~ m/--BEGIN/) {
3218                         push @comment, $line;
3219                         last;
3220                 } elsif ($line eq "") {
3221                         last;
3222                 }
3223         }
3224         push @comment, <$fd>;
3225         $tag{'comment'} = \@comment;
3226         close $fd or return;
3227         if (!defined $tag{'name'}) {
3228                 return
3229         };
3230         return %tag
3231 }
3232
3233 sub parse_commit_text {
3234         my ($commit_text, $withparents) = @_;
3235         my @commit_lines = split '\n', $commit_text;
3236         my %co;
3237
3238         pop @commit_lines; # Remove '\0'
3239
3240         if (! @commit_lines) {
3241                 return;
3242         }
3243
3244         my $header = shift @commit_lines;
3245         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3246                 return;
3247         }
3248         ($co{'id'}, my @parents) = split ' ', $header;
3249         while (my $line = shift @commit_lines) {
3250                 last if $line eq "\n";
3251                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3252                         $co{'tree'} = $1;
3253                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3254                         push @parents, $1;
3255                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3256                         $co{'author'} = to_utf8($1);
3257                         $co{'author_epoch'} = $2;
3258                         $co{'author_tz'} = $3;
3259                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3260                                 $co{'author_name'}  = $1;
3261                                 $co{'author_email'} = $2;
3262                         } else {
3263                                 $co{'author_name'} = $co{'author'};
3264                         }
3265                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3266                         $co{'committer'} = to_utf8($1);
3267                         $co{'committer_epoch'} = $2;
3268                         $co{'committer_tz'} = $3;
3269                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3270                                 $co{'committer_name'}  = $1;
3271                                 $co{'committer_email'} = $2;
3272                         } else {
3273                                 $co{'committer_name'} = $co{'committer'};
3274                         }
3275                 }
3276         }
3277         if (!defined $co{'tree'}) {
3278                 return;
3279         };
3280         $co{'parents'} = \@parents;
3281         $co{'parent'} = $parents[0];
3282
3283         foreach my $title (@commit_lines) {
3284                 $title =~ s/^    //;
3285                 if ($title ne "") {
3286                         $co{'title'} = chop_str($title, 80, 5);
3287                         # remove leading stuff of merges to make the interesting part visible
3288                         if (length($title) > 50) {
3289                                 $title =~ s/^Automatic //;
3290                                 $title =~ s/^merge (of|with) /Merge ... /i;
3291                                 if (length($title) > 50) {
3292                                         $title =~ s/(http|rsync):\/\///;
3293                                 }
3294                                 if (length($title) > 50) {
3295                                         $title =~ s/(master|www|rsync)\.//;
3296                                 }
3297                                 if (length($title) > 50) {
3298                                         $title =~ s/kernel.org:?//;
3299                                 }
3300                                 if (length($title) > 50) {
3301                                         $title =~ s/\/pub\/scm//;
3302                                 }
3303                         }
3304                         $co{'title_short'} = chop_str($title, 50, 5);
3305                         last;
3306                 }
3307         }
3308         if (! defined $co{'title'} || $co{'title'} eq "") {
3309                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3310         }
3311         # remove added spaces
3312         foreach my $line (@commit_lines) {
3313                 $line =~ s/^    //;
3314         }
3315         $co{'comment'} = \@commit_lines;
3316
3317         my $age = time - $co{'committer_epoch'};
3318         $co{'age'} = $age;
3319         $co{'age_string'} = age_string($age);
3320         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3321         if ($age > 60*60*24*7*2) {
3322                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3323                 $co{'age_string_age'} = $co{'age_string'};
3324         } else {
3325                 $co{'age_string_date'} = $co{'age_string'};
3326                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3327         }
3328         return %co;
3329 }
3330
3331 sub parse_commit {
3332         my ($commit_id) = @_;
3333         my %co;
3334
3335         local $/ = "\0";
3336
3337         open my $fd, "-|", git_cmd(), "rev-list",
3338                 "--parents",
3339                 "--header",
3340                 "--max-count=1",
3341                 $commit_id,
3342                 "--",
3343                 or die_error(500, "Open git-rev-list failed");
3344         %co = parse_commit_text(<$fd>, 1);
3345         close $fd;
3346
3347         return %co;
3348 }
3349
3350 sub parse_commits {
3351         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3352         my @cos;
3353
3354         $maxcount ||= 1;
3355         $skip ||= 0;
3356
3357         local $/ = "\0";
3358
3359         open my $fd, "-|", git_cmd(), "rev-list",
3360                 "--header",
3361                 @args,
3362                 ("--max-count=" . $maxcount),
3363                 ("--skip=" . $skip),
3364                 @extra_options,
3365                 $commit_id,
3366                 "--",
3367                 ($filename ? ($filename) : ())
3368                 or die_error(500, "Open git-rev-list failed");
3369         while (my $line = <$fd>) {
3370                 my %co = parse_commit_text($line);
3371                 push @cos, \%co;
3372         }
3373         close $fd;
3374
3375         return wantarray ? @cos : \@cos;
3376 }
3377
3378 # parse line of git-diff-tree "raw" output
3379 sub parse_difftree_raw_line {
3380         my $line = shift;
3381         my %res;
3382
3383         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3384         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3385         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3386                 $res{'from_mode'} = $1;
3387                 $res{'to_mode'} = $2;
3388                 $res{'from_id'} = $3;
3389                 $res{'to_id'} = $4;
3390                 $res{'status'} = $5;
3391                 $res{'similarity'} = $6;
3392                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3393                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3394                 } else {
3395                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3396                 }
3397         }
3398         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3399         # combined diff (for merge commit)
3400         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3401                 $res{'nparents'}  = length($1);
3402                 $res{'from_mode'} = [ split(' ', $2) ];
3403                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3404                 $res{'from_id'} = [ split(' ', $3) ];
3405                 $res{'to_id'} = pop @{$res{'from_id'}};
3406                 $res{'status'} = [ split('', $4) ];
3407                 $res{'to_file'} = unquote($5);
3408         }
3409         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3410         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3411                 $res{'commit'} = $1;
3412         }
3413
3414         return wantarray ? %res : \%res;
3415 }
3416
3417 # wrapper: return parsed line of git-diff-tree "raw" output
3418 # (the argument might be raw line, or parsed info)
3419 sub parsed_difftree_line {
3420         my $line_or_ref = shift;
3421
3422         if (ref($line_or_ref) eq "HASH") {
3423                 # pre-parsed (or generated by hand)
3424                 return $line_or_ref;
3425         } else {
3426                 return parse_difftree_raw_line($line_or_ref);
3427         }
3428 }
3429
3430 # parse line of git-ls-tree output
3431 sub parse_ls_tree_line {
3432         my $line = shift;
3433         my %opts = @_;
3434         my %res;
3435
3436         if ($opts{'-l'}) {
3437                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3438                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3439
3440                 $res{'mode'} = $1;
3441                 $res{'type'} = $2;
3442                 $res{'hash'} = $3;
3443                 $res{'size'} = $4;
3444                 if ($opts{'-z'}) {
3445                         $res{'name'} = $5;
3446                 } else {
3447                         $res{'name'} = unquote($5);
3448                 }
3449         } else {
3450                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3451                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3452
3453                 $res{'mode'} = $1;
3454                 $res{'type'} = $2;
3455                 $res{'hash'} = $3;
3456                 if ($opts{'-z'}) {
3457                         $res{'name'} = $4;
3458                 } else {
3459                         $res{'name'} = unquote($4);
3460                 }
3461         }
3462
3463         return wantarray ? %res : \%res;
3464 }
3465
3466 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3467 sub parse_from_to_diffinfo {
3468         my ($diffinfo, $from, $to, @parents) = @_;
3469
3470         if ($diffinfo->{'nparents'}) {
3471                 # combined diff
3472                 $from->{'file'} = [];
3473                 $from->{'href'} = [];
3474                 fill_from_file_info($diffinfo, @parents)
3475                         unless exists $diffinfo->{'from_file'};
3476                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3477                         $from->{'file'}[$i] =
3478                                 defined $diffinfo->{'from_file'}[$i] ?
3479                                         $diffinfo->{'from_file'}[$i] :
3480                                         $diffinfo->{'to_file'};
3481                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3482                                 $from->{'href'}[$i] = href(action=>"blob",
3483                                                            hash_base=>$parents[$i],
3484                                                            hash=>$diffinfo->{'from_id'}[$i],
3485                                                            file_name=>$from->{'file'}[$i]);
3486                         } else {
3487                                 $from->{'href'}[$i] = undef;
3488                         }
3489                 }
3490         } else {
3491                 # ordinary (not combined) diff
3492                 $from->{'file'} = $diffinfo->{'from_file'};
3493                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3494                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3495                                                hash=>$diffinfo->{'from_id'},
3496                                                file_name=>$from->{'file'});
3497                 } else {
3498                         delete $from->{'href'};
3499                 }
3500         }
3501
3502         $to->{'file'} = $diffinfo->{'to_file'};
3503         if (!is_deleted($diffinfo)) { # file exists in result
3504                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3505                                      hash=>$diffinfo->{'to_id'},
3506                                      file_name=>$to->{'file'});
3507         } else {
3508                 delete $to->{'href'};
3509         }
3510 }
3511
3512 ## ......................................................................
3513 ## parse to array of hashes functions
3514
3515 sub git_get_heads_list {
3516         my ($limit, @classes) = @_;
3517         @classes = ('heads') unless @classes;
3518         my @patterns = map { "refs/$_" } @classes;
3519         my @headslist;
3520
3521         open my $fd, '-|', git_cmd(), 'for-each-ref',
3522                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3523                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3524                 @patterns
3525                 or return;
3526         while (my $line = <$fd>) {
3527                 my %ref_item;
3528
3529                 chomp $line;
3530                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3531                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3532                 my ($committer, $epoch, $tz) =
3533                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3534                 $ref_item{'fullname'}  = $name;
3535                 $name =~ s!^refs/(?:head|remote)s/!!;
3536
3537                 $ref_item{'name'}  = $name;
3538                 $ref_item{'id'}    = $hash;
3539                 $ref_item{'title'} = $title || '(no commit message)';
3540                 $ref_item{'epoch'} = $epoch;
3541                 if ($epoch) {
3542                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3543                 } else {
3544                         $ref_item{'age'} = "unknown";
3545                 }
3546
3547                 push @headslist, \%ref_item;
3548         }
3549         close $fd;
3550
3551         return wantarray ? @headslist : \@headslist;
3552 }
3553
3554 sub git_get_tags_list {
3555         my $limit = shift;
3556         my @tagslist;
3557
3558         open my $fd, '-|', git_cmd(), 'for-each-ref',
3559                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3560                 '--format=%(objectname) %(objecttype) %(refname) '.
3561                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3562                 'refs/tags'
3563                 or return;
3564         while (my $line = <$fd>) {
3565                 my %ref_item;
3566
3567                 chomp $line;
3568                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3569                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3570                 my ($creator, $epoch, $tz) =
3571                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3572                 $ref_item{'fullname'} = $name;
3573                 $name =~ s!^refs/tags/!!;
3574
3575                 $ref_item{'type'} = $type;
3576                 $ref_item{'id'} = $id;
3577                 $ref_item{'name'} = $name;
3578                 if ($type eq "tag") {
3579                         $ref_item{'subject'} = $title;
3580                         $ref_item{'reftype'} = $reftype;
3581                         $ref_item{'refid'}   = $refid;
3582                 } else {
3583                         $ref_item{'reftype'} = $type;
3584                         $ref_item{'refid'}   = $id;
3585                 }
3586
3587                 if ($type eq "tag" || $type eq "commit") {
3588                         $ref_item{'epoch'} = $epoch;
3589                         if ($epoch) {
3590                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3591                         } else {
3592                                 $ref_item{'age'} = "unknown";
3593                         }
3594                 }
3595
3596                 push @tagslist, \%ref_item;
3597         }
3598         close $fd;
3599
3600         return wantarray ? @tagslist : \@tagslist;
3601 }
3602
3603 ## ----------------------------------------------------------------------
3604 ## filesystem-related functions
3605
3606 sub get_file_owner {
3607         my $path = shift;
3608
3609         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3610         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3611         if (!defined $gcos) {
3612                 return undef;
3613         }
3614         my $owner = $gcos;
3615         $owner =~ s/[,;].*$//;
3616         return to_utf8($owner);
3617 }
3618
3619 # assume that file exists
3620 sub insert_file {
3621         my $filename = shift;
3622
3623         open my $fd, '<', $filename;
3624         print map { to_utf8($_) } <$fd>;
3625         close $fd;
3626 }
3627
3628 ## ......................................................................
3629 ## mimetype related functions
3630
3631 sub mimetype_guess_file {
3632         my $filename = shift;
3633         my $mimemap = shift;
3634         -r $mimemap or return undef;
3635
3636         my %mimemap;
3637         open(my $mh, '<', $mimemap) or return undef;
3638         while (<$mh>) {
3639                 next if m/^#/; # skip comments
3640                 my ($mimetype, @exts) = split(/\s+/);
3641                 foreach my $ext (@exts) {
3642                         $mimemap{$ext} = $mimetype;
3643                 }
3644         }
3645         close($mh);
3646
3647         $filename =~ /\.([^.]*)$/;
3648         return $mimemap{$1};
3649 }
3650
3651 sub mimetype_guess {
3652         my $filename = shift;
3653         my $mime;
3654         $filename =~ /\./ or return undef;
3655
3656         if ($mimetypes_file) {
3657                 my $file = $mimetypes_file;
3658                 if ($file !~ m!^/!) { # if it is relative path
3659                         # it is relative to project
3660                         $file = "$projectroot/$project/$file";
3661                 }
3662                 $mime = mimetype_guess_file($filename, $file);
3663         }
3664         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3665         return $mime;
3666 }
3667
3668 sub blob_mimetype {
3669         my $fd = shift;
3670         my $filename = shift;
3671
3672         if ($filename) {
3673                 my $mime = mimetype_guess($filename);
3674                 $mime and return $mime;
3675         }
3676
3677         # just in case
3678         return $default_blob_plain_mimetype unless $fd;
3679
3680         if (-T $fd) {
3681                 return 'text/plain';
3682         } elsif (! $filename) {
3683                 return 'application/octet-stream';
3684         } elsif ($filename =~ m/\.png$/i) {
3685                 return 'image/png';
3686         } elsif ($filename =~ m/\.gif$/i) {
3687                 return 'image/gif';
3688         } elsif ($filename =~ m/\.jpe?g$/i) {
3689                 return 'image/jpeg';
3690         } else {
3691                 return 'application/octet-stream';
3692         }
3693 }
3694
3695 sub blob_contenttype {
3696         my ($fd, $file_name, $type) = @_;
3697
3698         $type ||= blob_mimetype($fd, $file_name);
3699         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3700                 $type .= "; charset=$default_text_plain_charset";
3701         }
3702
3703         return $type;
3704 }
3705
3706 # guess file syntax for syntax highlighting; return undef if no highlighting
3707 # the name of syntax can (in the future) depend on syntax highlighter used
3708 sub guess_file_syntax {
3709         my ($highlight, $mimetype, $file_name) = @_;
3710         return undef unless ($highlight && defined $file_name);
3711         my $basename = basename($file_name, '.in');
3712         return $highlight_basename{$basename}
3713                 if exists $highlight_basename{$basename};
3714
3715         $basename =~ /\.([^.]*)$/;
3716         my $ext = $1 or return undef;
3717         return $highlight_ext{$ext}
3718                 if exists $highlight_ext{$ext};
3719
3720         return undef;
3721 }
3722
3723 # run highlighter and return FD of its output,
3724 # or return original FD if no highlighting
3725 sub run_highlighter {
3726         my ($fd, $highlight, $syntax) = @_;
3727         return $fd unless ($highlight && defined $syntax);
3728
3729         close $fd;
3730         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3731                   quote_command($highlight_bin).
3732                   " --replace-tabs=8 --fragment --syntax $syntax |"
3733                 or die_error(500, "Couldn't open file or run syntax highlighter");
3734         return $fd;
3735 }
3736
3737 ## ======================================================================
3738 ## functions printing HTML: header, footer, error page
3739
3740 sub get_page_title {
3741         my $title = to_utf8($site_name);
3742
3743         unless (defined $project) {
3744                 if (defined $project_filter) {
3745                         $title .= " - " . to_utf8($project_filter);
3746                 }
3747                 return $title;
3748         }
3749         $title .= " - " . to_utf8($project);
3750
3751         return $title unless (defined $action);
3752         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3753
3754         return $title unless (defined $file_name);
3755         $title .= " - " . esc_path($file_name);
3756         if ($action eq "tree" && $file_name !~ m|/$|) {
3757                 $title .= "/";
3758         }
3759
3760         return $title;
3761 }
3762
3763 sub get_content_type_html {
3764         # require explicit support from the UA if we are to send the page as
3765         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3766         # we have to do this because MSIE sometimes globs '*/*', pretending to
3767         # support xhtml+xml but choking when it gets what it asked for.
3768         if (defined $cgi->http('HTTP_ACCEPT') &&
3769             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3770             $cgi->Accept('application/xhtml+xml') != 0) {
3771                 return 'application/xhtml+xml';
3772         } else {
3773                 return 'text/html';
3774         }
3775 }
3776
3777 sub print_feed_meta {
3778         if (defined $project) {
3779                 my %href_params = get_feed_info();
3780                 if (!exists $href_params{'-title'}) {
3781                         $href_params{'-title'} = 'log';
3782                 }
3783
3784                 foreach my $format (qw(RSS Atom)) {
3785                         my $type = lc($format);
3786                         my %link_attr = (
3787                                 '-rel' => 'alternate',
3788                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3789                                 '-type' => "application/$type+xml"
3790                         );
3791
3792                         $href_params{'action'} = $type;
3793                         $link_attr{'-href'} = href(%href_params);
3794                         print "<link ".
3795                               "rel=\"$link_attr{'-rel'}\" ".
3796                               "title=\"$link_attr{'-title'}\" ".
3797                               "href=\"$link_attr{'-href'}\" ".
3798                               "type=\"$link_attr{'-type'}\" ".
3799                               "/>\n";
3800
3801                         $href_params{'extra_options'} = '--no-merges';
3802                         $link_attr{'-href'} = href(%href_params);
3803                         $link_attr{'-title'} .= ' (no merges)';
3804                         print "<link ".
3805                               "rel=\"$link_attr{'-rel'}\" ".
3806                               "title=\"$link_attr{'-title'}\" ".
3807                               "href=\"$link_attr{'-href'}\" ".
3808                               "type=\"$link_attr{'-type'}\" ".
3809                               "/>\n";
3810                 }
3811
3812         } else {
3813                 printf('<link rel="alternate" title="%s projects list" '.
3814                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3815                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3816                 printf('<link rel="alternate" title="%s projects feeds" '.
3817                        'href="%s" type="text/x-opml" />'."\n",
3818                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3819         }
3820 }
3821
3822 sub print_header_links {
3823         my $status = shift;
3824
3825         # print out each stylesheet that exist, providing backwards capability
3826         # for those people who defined $stylesheet in a config file
3827         if (defined $stylesheet) {
3828                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3829         } else {
3830                 foreach my $stylesheet (@stylesheets) {
3831                         next unless $stylesheet;
3832                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3833                 }
3834         }
3835         print_feed_meta()
3836                 if ($status eq '200 OK');
3837         if (defined $favicon) {
3838                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3839         }
3840 }
3841
3842 sub print_nav_breadcrumbs {
3843         my %opts = @_;
3844
3845         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3846         if (defined $project) {
3847                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3848                 if (defined $action) {
3849                         my $action_print = $action ;
3850                         if (defined $opts{-action_extra}) {
3851                                 $action_print = $cgi->a({-href => href(action=>$action)},
3852                                         $action);
3853                         }
3854                         print " / $action_print";
3855                 }
3856                 if (defined $opts{-action_extra}) {
3857                         print " / $opts{-action_extra}";
3858                 }
3859                 print "\n";
3860         }
3861 }
3862
3863 sub print_search_form {
3864         if (!defined $searchtext) {
3865                 $searchtext = "";
3866         }
3867         my $search_hash;
3868         if (defined $hash_base) {
3869                 $search_hash = $hash_base;
3870         } elsif (defined $hash) {
3871                 $search_hash = $hash;
3872         } else {
3873                 $search_hash = "HEAD";
3874         }
3875         my $action = $my_uri;
3876         my $use_pathinfo = gitweb_check_feature('pathinfo');
3877         if ($use_pathinfo) {
3878                 $action .= "/".esc_url($project);
3879         }
3880         print $cgi->startform(-method => "get", -action => $action) .
3881               "<div class=\"search\">\n" .
3882               (!$use_pathinfo &&
3883               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3884               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3885               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3886               $cgi->popup_menu(-name => 'st', -default => 'commit',
3887                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3888               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3889               " search:\n",
3890               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3891               "<span title=\"Extended regular expression\">" .
3892               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3893                              -checked => $search_use_regexp) .
3894               "</span>" .
3895               "</div>" .
3896               $cgi->end_form() . "\n";
3897 }
3898
3899 sub git_header_html {
3900         my $status = shift || "200 OK";
3901         my $expires = shift;
3902         my %opts = @_;
3903
3904         my $title = get_page_title();
3905         my $content_type = get_content_type_html();
3906         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3907                            -status=> $status, -expires => $expires)
3908                 unless ($opts{'-no_http_header'});
3909         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3910         print <<EOF;
3911 <?xml version="1.0" encoding="utf-8"?>
3912 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3913 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3914 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3915 <!-- git core binaries version $git_version -->
3916 <head>
3917 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3918 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3919 <meta name="robots" content="index, nofollow"/>
3920 <title>$title</title>
3921 EOF
3922         # the stylesheet, favicon etc urls won't work correctly with path_info
3923         # unless we set the appropriate base URL
3924         if ($ENV{'PATH_INFO'}) {
3925                 print "<base href=\"".esc_url($base_url)."\" />\n";
3926         }
3927         print_header_links($status);
3928
3929         if (defined $site_html_head_string) {
3930                 print to_utf8($site_html_head_string);
3931         }
3932
3933         print "</head>\n" .
3934               "<body>\n";
3935
3936         if (defined $site_header && -f $site_header) {
3937                 insert_file($site_header);
3938         }
3939
3940         print "<div class=\"page_header\">\n";
3941         if (defined $logo) {
3942                 print $cgi->a({-href => esc_url($logo_url),
3943                                -title => $logo_label},
3944                               $cgi->img({-src => esc_url($logo),
3945                                          -width => 72, -height => 27,
3946                                          -alt => "git",
3947                                          -class => "logo"}));
3948         }
3949         print_nav_breadcrumbs(%opts);
3950         print "</div>\n";
3951
3952         my $have_search = gitweb_check_feature('search');
3953         if (defined $project && $have_search) {
3954                 print_search_form();
3955         }
3956 }
3957
3958 sub git_footer_html {
3959         my $feed_class = 'rss_logo';
3960
3961         print "<div class=\"page_footer\">\n";
3962         if (defined $project) {
3963                 my $descr = git_get_project_description($project);
3964                 if (defined $descr) {
3965                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3966                 }
3967
3968                 my %href_params = get_feed_info();
3969                 if (!%href_params) {
3970                         $feed_class .= ' generic';
3971                 }
3972                 $href_params{'-title'} ||= 'log';
3973
3974                 foreach my $format (qw(RSS Atom)) {
3975                         $href_params{'action'} = lc($format);
3976                         print $cgi->a({-href => href(%href_params),
3977                                       -title => "$href_params{'-title'} $format feed",
3978                                       -class => $feed_class}, $format)."\n";
3979                 }
3980
3981         } else {
3982                 print $cgi->a({-href => href(project=>undef, action=>"opml",
3983                                              project_filter => $project_filter),
3984                               -class => $feed_class}, "OPML") . " ";
3985                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
3986                                              project_filter => $project_filter),
3987                               -class => $feed_class}, "TXT") . "\n";
3988         }
3989         print "</div>\n"; # class="page_footer"
3990
3991         if (defined $t0 && gitweb_check_feature('timed')) {
3992                 print "<div id=\"generating_info\">\n";
3993                 print 'This page took '.
3994                       '<span id="generating_time" class="time_span">'.
3995                       tv_interval($t0, [ gettimeofday() ]).
3996                       ' seconds </span>'.
3997                       ' and '.
3998                       '<span id="generating_cmd">'.
3999                       $number_of_git_cmds.
4000                       '</span> git commands '.
4001                       " to generate.\n";
4002                 print "</div>\n"; # class="page_footer"
4003         }
4004
4005         if (defined $site_footer && -f $site_footer) {
4006                 insert_file($site_footer);
4007         }
4008
4009         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4010         if (defined $action &&
4011             $action eq 'blame_incremental') {
4012                 print qq!<script type="text/javascript">\n!.
4013                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4014                       qq!           "!. href() .qq!");\n!.
4015                       qq!</script>\n!;
4016         } else {
4017                 my ($jstimezone, $tz_cookie, $datetime_class) =
4018                         gitweb_get_feature('javascript-timezone');
4019
4020                 print qq!<script type="text/javascript">\n!.
4021                       qq!window.onload = function () {\n!;
4022                 if (gitweb_check_feature('javascript-actions')) {
4023                         print qq!       fixLinks();\n!;
4024                 }
4025                 if ($jstimezone && $tz_cookie && $datetime_class) {
4026                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4027                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4028                 }
4029                 print qq!};\n!.
4030                       qq!</script>\n!;
4031         }
4032
4033         print "</body>\n" .
4034               "</html>";
4035 }
4036
4037 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4038 # Example: die_error(404, 'Hash not found')
4039 # By convention, use the following status codes (as defined in RFC 2616):
4040 # 400: Invalid or missing CGI parameters, or
4041 #      requested object exists but has wrong type.
4042 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4043 #      this server or project.
4044 # 404: Requested object/revision/project doesn't exist.
4045 # 500: The server isn't configured properly, or
4046 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4047 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4048 # 503: The server is currently unavailable (because it is overloaded,
4049 #      or down for maintenance).  Generally, this is a temporary state.
4050 sub die_error {
4051         my $status = shift || 500;
4052         my $error = esc_html(shift) || "Internal Server Error";
4053         my $extra = shift;
4054         my %opts = @_;
4055
4056         my %http_responses = (
4057                 400 => '400 Bad Request',
4058                 403 => '403 Forbidden',
4059                 404 => '404 Not Found',
4060                 500 => '500 Internal Server Error',
4061                 503 => '503 Service Unavailable',
4062         );
4063         git_header_html($http_responses{$status}, undef, %opts);
4064         print <<EOF;
4065 <div class="page_body">
4066 <br /><br />
4067 $status - $error
4068 <br />
4069 EOF
4070         if (defined $extra) {
4071                 print "<hr />\n" .
4072                       "$extra\n";
4073         }
4074         print "</div>\n";
4075
4076         git_footer_html();
4077         goto DONE_GITWEB
4078                 unless ($opts{'-error_handler'});
4079 }
4080
4081 ## ----------------------------------------------------------------------
4082 ## functions printing or outputting HTML: navigation
4083
4084 sub git_print_page_nav {
4085         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4086         $extra = '' if !defined $extra; # pager or formats
4087
4088         my @navs = qw(summary shortlog log commit commitdiff tree);
4089         if ($suppress) {
4090                 @navs = grep { $_ ne $suppress } @navs;
4091         }
4092
4093         my %arg = map { $_ => {action=>$_} } @navs;
4094         if (defined $head) {
4095                 for (qw(commit commitdiff)) {
4096                         $arg{$_}{'hash'} = $head;
4097                 }
4098                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4099                         for (qw(shortlog log)) {
4100                                 $arg{$_}{'hash'} = $head;
4101                         }
4102                 }
4103         }
4104
4105         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4106         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4107
4108         my @actions = gitweb_get_feature('actions');
4109         my %repl = (
4110                 '%' => '%',
4111                 'n' => $project,         # project name
4112                 'f' => $git_dir,         # project path within filesystem
4113                 'h' => $treehead || '',  # current hash ('h' parameter)
4114                 'b' => $treebase || '',  # hash base ('hb' parameter)
4115         );
4116         while (@actions) {
4117                 my ($label, $link, $pos) = splice(@actions,0,3);
4118                 # insert
4119                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4120                 # munch munch
4121                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4122                 $arg{$label}{'_href'} = $link;
4123         }
4124
4125         print "<div class=\"page_nav\">\n" .
4126                 (join " | ",
4127                  map { $_ eq $current ?
4128                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4129                  } @navs);
4130         print "<br/>\n$extra<br/>\n" .
4131               "</div>\n";
4132 }
4133
4134 # returns a submenu for the nagivation of the refs views (tags, heads,
4135 # remotes) with the current view disabled and the remotes view only
4136 # available if the feature is enabled
4137 sub format_ref_views {
4138         my ($current) = @_;
4139         my @ref_views = qw{tags heads};
4140         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4141         return join " | ", map {
4142                 $_ eq $current ? $_ :
4143                 $cgi->a({-href => href(action=>$_)}, $_)
4144         } @ref_views
4145 }
4146
4147 sub format_paging_nav {
4148         my ($action, $page, $has_next_link) = @_;
4149         my $paging_nav;
4150
4151
4152         if ($page > 0) {
4153                 $paging_nav .=
4154                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4155                         " &sdot; " .
4156                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4157                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4158         } else {
4159                 $paging_nav .= "first &sdot; prev";
4160         }
4161
4162         if ($has_next_link) {
4163                 $paging_nav .= " &sdot; " .
4164                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4165                                  -accesskey => "n", -title => "Alt-n"}, "next");
4166         } else {
4167                 $paging_nav .= " &sdot; next";
4168         }
4169
4170         return $paging_nav;
4171 }
4172
4173 ## ......................................................................
4174 ## functions printing or outputting HTML: div
4175
4176 sub git_print_header_div {
4177         my ($action, $title, $hash, $hash_base) = @_;
4178         my %args = ();
4179
4180         $args{'action'} = $action;
4181         $args{'hash'} = $hash if $hash;
4182         $args{'hash_base'} = $hash_base if $hash_base;
4183
4184         print "<div class=\"header\">\n" .
4185               $cgi->a({-href => href(%args), -class => "title"},
4186               $title ? $title : $action) .
4187               "\n</div>\n";
4188 }
4189
4190 sub format_repo_url {
4191         my ($name, $url) = @_;
4192         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4193 }
4194
4195 # Group output by placing it in a DIV element and adding a header.
4196 # Options for start_div() can be provided by passing a hash reference as the
4197 # first parameter to the function.
4198 # Options to git_print_header_div() can be provided by passing an array
4199 # reference. This must follow the options to start_div if they are present.
4200 # The content can be a scalar, which is output as-is, a scalar reference, which
4201 # is output after html escaping, an IO handle passed either as *handle or
4202 # *handle{IO}, or a function reference. In the latter case all following
4203 # parameters will be taken as argument to the content function call.
4204 sub git_print_section {
4205         my ($div_args, $header_args, $content);
4206         my $arg = shift;
4207         if (ref($arg) eq 'HASH') {
4208                 $div_args = $arg;
4209                 $arg = shift;
4210         }
4211         if (ref($arg) eq 'ARRAY') {
4212                 $header_args = $arg;
4213                 $arg = shift;
4214         }
4215         $content = $arg;
4216
4217         print $cgi->start_div($div_args);
4218         git_print_header_div(@$header_args);
4219
4220         if (ref($content) eq 'CODE') {
4221                 $content->(@_);
4222         } elsif (ref($content) eq 'SCALAR') {
4223                 print esc_html($$content);
4224         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4225                 print <$content>;
4226         } elsif (!ref($content) && defined($content)) {
4227                 print $content;
4228         }
4229
4230         print $cgi->end_div;
4231 }
4232
4233 sub format_timestamp_html {
4234         my $date = shift;
4235         my $strtime = $date->{'rfc2822'};
4236
4237         my (undef, undef, $datetime_class) =
4238                 gitweb_get_feature('javascript-timezone');
4239         if ($datetime_class) {
4240                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4241         }
4242
4243         my $localtime_format = '(%02d:%02d %s)';
4244         if ($date->{'hour_local'} < 6) {
4245                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4246         }
4247         $strtime .= ' ' .
4248                     sprintf($localtime_format,
4249                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4250
4251         return $strtime;
4252 }
4253
4254 # Outputs the author name and date in long form
4255 sub git_print_authorship {
4256         my $co = shift;
4257         my %opts = @_;
4258         my $tag = $opts{-tag} || 'div';
4259         my $author = $co->{'author_name'};
4260
4261         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4262         print "<$tag class=\"author_date\">" .
4263               format_search_author($author, "author", esc_html($author)) .
4264               " [".format_timestamp_html(\%ad)."]".
4265               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4266               "</$tag>\n";
4267 }
4268
4269 # Outputs table rows containing the full author or committer information,
4270 # in the format expected for 'commit' view (& similar).
4271 # Parameters are a commit hash reference, followed by the list of people
4272 # to output information for. If the list is empty it defaults to both
4273 # author and committer.
4274 sub git_print_authorship_rows {
4275         my $co = shift;
4276         # too bad we can't use @people = @_ || ('author', 'committer')
4277         my @people = @_;
4278         @people = ('author', 'committer') unless @people;
4279         foreach my $who (@people) {
4280                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4281                 print "<tr><td>$who</td><td>" .
4282                       format_search_author($co->{"${who}_name"}, $who,
4283                                            esc_html($co->{"${who}_name"})) . " " .
4284                       format_search_author($co->{"${who}_email"}, $who,
4285                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4286                       "</td><td rowspan=\"2\">" .
4287                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4288                       "</td></tr>\n" .
4289                       "<tr>" .
4290                       "<td></td><td>" .
4291                       format_timestamp_html(\%wd) .
4292                       "</td>" .
4293                       "</tr>\n";
4294         }
4295 }
4296
4297 sub git_print_page_path {
4298         my $name = shift;
4299         my $type = shift;
4300         my $hb = shift;
4301
4302
4303         print "<div class=\"page_path\">";
4304         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4305                       -title => 'tree root'}, to_utf8("[$project]"));
4306         print " / ";
4307         if (defined $name) {
4308                 my @dirname = split '/', $name;
4309                 my $basename = pop @dirname;
4310                 my $fullname = '';
4311
4312                 foreach my $dir (@dirname) {
4313                         $fullname .= ($fullname ? '/' : '') . $dir;
4314                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4315                                                      hash_base=>$hb),
4316                                       -title => $fullname}, esc_path($dir));
4317                         print " / ";
4318                 }
4319                 if (defined $type && $type eq 'blob') {
4320                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4321                                                      hash_base=>$hb),
4322                                       -title => $name}, esc_path($basename));
4323                 } elsif (defined $type && $type eq 'tree') {
4324                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4325                                                      hash_base=>$hb),
4326                                       -title => $name}, esc_path($basename));
4327                         print " / ";
4328                 } else {
4329                         print esc_path($basename);
4330                 }
4331         }
4332         print "<br/></div>\n";
4333 }
4334
4335 sub git_print_log {
4336         my $log = shift;
4337         my %opts = @_;
4338
4339         if ($opts{'-remove_title'}) {
4340                 # remove title, i.e. first line of log
4341                 shift @$log;
4342         }
4343         # remove leading empty lines
4344         while (defined $log->[0] && $log->[0] eq "") {
4345                 shift @$log;
4346         }
4347
4348         # print log
4349         my $signoff = 0;
4350         my $empty = 0;
4351         foreach my $line (@$log) {
4352                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4353                         $signoff = 1;
4354                         $empty = 0;
4355                         if (! $opts{'-remove_signoff'}) {
4356                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4357                                 next;
4358                         } else {
4359                                 # remove signoff lines
4360                                 next;
4361                         }
4362                 } else {
4363                         $signoff = 0;
4364                 }
4365
4366                 # print only one empty line
4367                 # do not print empty line after signoff
4368                 if ($line eq "") {
4369                         next if ($empty || $signoff);
4370                         $empty = 1;
4371                 } else {
4372                         $empty = 0;
4373                 }
4374
4375                 print format_log_line_html($line) . "<br/>\n";
4376         }
4377
4378         if ($opts{'-final_empty_line'}) {
4379                 # end with single empty line
4380                 print "<br/>\n" unless $empty;
4381         }
4382 }
4383
4384 # return link target (what link points to)
4385 sub git_get_link_target {
4386         my $hash = shift;
4387         my $link_target;
4388
4389         # read link
4390         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4391                 or return;
4392         {
4393                 local $/ = undef;
4394                 $link_target = <$fd>;
4395         }
4396         close $fd
4397                 or return;
4398
4399         return $link_target;
4400 }
4401
4402 # given link target, and the directory (basedir) the link is in,
4403 # return target of link relative to top directory (top tree);
4404 # return undef if it is not possible (including absolute links).
4405 sub normalize_link_target {
4406         my ($link_target, $basedir) = @_;
4407
4408         # absolute symlinks (beginning with '/') cannot be normalized
4409         return if (substr($link_target, 0, 1) eq '/');
4410
4411         # normalize link target to path from top (root) tree (dir)
4412         my $path;
4413         if ($basedir) {
4414                 $path = $basedir . '/' . $link_target;
4415         } else {
4416                 # we are in top (root) tree (dir)
4417                 $path = $link_target;
4418         }
4419
4420         # remove //, /./, and /../
4421         my @path_parts;
4422         foreach my $part (split('/', $path)) {
4423                 # discard '.' and ''
4424                 next if (!$part || $part eq '.');
4425                 # handle '..'
4426                 if ($part eq '..') {
4427                         if (@path_parts) {
4428                                 pop @path_parts;
4429                         } else {
4430                                 # link leads outside repository (outside top dir)
4431                                 return;
4432                         }
4433                 } else {
4434                         push @path_parts, $part;
4435                 }
4436         }
4437         $path = join('/', @path_parts);
4438
4439         return $path;
4440 }
4441
4442 # print tree entry (row of git_tree), but without encompassing <tr> element
4443 sub git_print_tree_entry {
4444         my ($t, $basedir, $hash_base, $have_blame) = @_;
4445
4446         my %base_key = ();
4447         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4448
4449         # The format of a table row is: mode list link.  Where mode is
4450         # the mode of the entry, list is the name of the entry, an href,
4451         # and link is the action links of the entry.
4452
4453         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4454         if (exists $t->{'size'}) {
4455                 print "<td class=\"size\">$t->{'size'}</td>\n";
4456         }
4457         if ($t->{'type'} eq "blob") {
4458                 print "<td class=\"list\">" .
4459                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4460                                                file_name=>"$basedir$t->{'name'}", %base_key),
4461                                 -class => "list"}, esc_path($t->{'name'}));
4462                 if (S_ISLNK(oct $t->{'mode'})) {
4463                         my $link_target = git_get_link_target($t->{'hash'});
4464                         if ($link_target) {
4465                                 my $norm_target = normalize_link_target($link_target, $basedir);
4466                                 if (defined $norm_target) {
4467                                         print " -> " .
4468                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4469                                                                      file_name=>$norm_target),
4470                                                        -title => $norm_target}, esc_path($link_target));
4471                                 } else {
4472                                         print " -> " . esc_path($link_target);
4473                                 }
4474                         }
4475                 }
4476                 print "</td>\n";
4477                 print "<td class=\"link\">";
4478                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4479                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4480                               "blob");
4481                 if ($have_blame) {
4482                         print " | " .
4483                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4484                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4485                                       "blame");
4486                 }
4487                 if (defined $hash_base) {
4488                         print " | " .
4489                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4490                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4491                                       "history");
4492                 }
4493                 print " | " .
4494                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4495                                                file_name=>"$basedir$t->{'name'}")},
4496                                 "raw");
4497                 print "</td>\n";
4498
4499         } elsif ($t->{'type'} eq "tree") {
4500                 print "<td class=\"list\">";
4501                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4502                                              file_name=>"$basedir$t->{'name'}",
4503                                              %base_key)},
4504                               esc_path($t->{'name'}));
4505                 print "</td>\n";
4506                 print "<td class=\"link\">";
4507                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4508                                              file_name=>"$basedir$t->{'name'}",
4509                                              %base_key)},
4510                               "tree");
4511                 if (defined $hash_base) {
4512                         print " | " .
4513                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4514                                                      file_name=>"$basedir$t->{'name'}")},
4515                                       "history");
4516                 }
4517                 print "</td>\n";
4518         } else {
4519                 # unknown object: we can only present history for it
4520                 # (this includes 'commit' object, i.e. submodule support)
4521                 print "<td class=\"list\">" .
4522                       esc_path($t->{'name'}) .
4523                       "</td>\n";
4524                 print "<td class=\"link\">";
4525                 if (defined $hash_base) {
4526                         print $cgi->a({-href => href(action=>"history",
4527                                                      hash_base=>$hash_base,
4528                                                      file_name=>"$basedir$t->{'name'}")},
4529                                       "history");
4530                 }
4531                 print "</td>\n";
4532         }
4533 }
4534
4535 ## ......................................................................
4536 ## functions printing large fragments of HTML
4537
4538 # get pre-image filenames for merge (combined) diff
4539 sub fill_from_file_info {
4540         my ($diff, @parents) = @_;
4541
4542         $diff->{'from_file'} = [ ];
4543         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4544         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4545                 if ($diff->{'status'}[$i] eq 'R' ||
4546                     $diff->{'status'}[$i] eq 'C') {
4547                         $diff->{'from_file'}[$i] =
4548                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4549                 }
4550         }
4551
4552         return $diff;
4553 }
4554
4555 # is current raw difftree line of file deletion
4556 sub is_deleted {
4557         my $diffinfo = shift;
4558
4559         return $diffinfo->{'to_id'} eq ('0' x 40);
4560 }
4561
4562 # does patch correspond to [previous] difftree raw line
4563 # $diffinfo  - hashref of parsed raw diff format
4564 # $patchinfo - hashref of parsed patch diff format
4565 #              (the same keys as in $diffinfo)
4566 sub is_patch_split {
4567         my ($diffinfo, $patchinfo) = @_;
4568
4569         return defined $diffinfo && defined $patchinfo
4570                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4571 }
4572
4573
4574 sub git_difftree_body {
4575         my ($difftree, $hash, @parents) = @_;
4576         my ($parent) = $parents[0];
4577         my $have_blame = gitweb_check_feature('blame');
4578         print "<div class=\"list_head\">\n";
4579         if ($#{$difftree} > 10) {
4580                 print(($#{$difftree} + 1) . " files changed:\n");
4581         }
4582         print "</div>\n";
4583
4584         print "<table class=\"" .
4585               (@parents > 1 ? "combined " : "") .
4586               "diff_tree\">\n";
4587
4588         # header only for combined diff in 'commitdiff' view
4589         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4590         if ($has_header) {
4591                 # table header
4592                 print "<thead><tr>\n" .
4593                        "<th></th><th></th>\n"; # filename, patchN link
4594                 for (my $i = 0; $i < @parents; $i++) {
4595                         my $par = $parents[$i];
4596                         print "<th>" .
4597                               $cgi->a({-href => href(action=>"commitdiff",
4598                                                      hash=>$hash, hash_parent=>$par),
4599                                        -title => 'commitdiff to parent number ' .
4600                                                   ($i+1) . ': ' . substr($par,0,7)},
4601                                       $i+1) .
4602                               "&nbsp;</th>\n";
4603                 }
4604                 print "</tr></thead>\n<tbody>\n";
4605         }
4606
4607         my $alternate = 1;
4608         my $patchno = 0;
4609         foreach my $line (@{$difftree}) {
4610                 my $diff = parsed_difftree_line($line);
4611
4612                 if ($alternate) {
4613                         print "<tr class=\"dark\">\n";
4614                 } else {
4615                         print "<tr class=\"light\">\n";
4616                 }
4617                 $alternate ^= 1;
4618
4619                 if (exists $diff->{'nparents'}) { # combined diff
4620
4621                         fill_from_file_info($diff, @parents)
4622                                 unless exists $diff->{'from_file'};
4623
4624                         if (!is_deleted($diff)) {
4625                                 # file exists in the result (child) commit
4626                                 print "<td>" .
4627                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4628                                                              file_name=>$diff->{'to_file'},
4629                                                              hash_base=>$hash),
4630                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4631                                       "</td>\n";
4632                         } else {
4633                                 print "<td>" .
4634                                       esc_path($diff->{'to_file'}) .
4635                                       "</td>\n";
4636                         }
4637
4638                         if ($action eq 'commitdiff') {
4639                                 # link to patch
4640                                 $patchno++;
4641                                 print "<td class=\"link\">" .
4642                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4643                                               "patch") .
4644                                       " | " .
4645                                       "</td>\n";
4646                         }
4647
4648                         my $has_history = 0;
4649                         my $not_deleted = 0;
4650                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4651                                 my $hash_parent = $parents[$i];
4652                                 my $from_hash = $diff->{'from_id'}[$i];
4653                                 my $from_path = $diff->{'from_file'}[$i];
4654                                 my $status = $diff->{'status'}[$i];
4655
4656                                 $has_history ||= ($status ne 'A');
4657                                 $not_deleted ||= ($status ne 'D');
4658
4659                                 if ($status eq 'A') {
4660                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4661                                 } elsif ($status eq 'D') {
4662                                         print "<td class=\"link\">" .
4663                                               $cgi->a({-href => href(action=>"blob",
4664                                                                      hash_base=>$hash,
4665                                                                      hash=>$from_hash,
4666                                                                      file_name=>$from_path)},
4667                                                       "blob" . ($i+1)) .
4668                                               " | </td>\n";
4669                                 } else {
4670                                         if ($diff->{'to_id'} eq $from_hash) {
4671                                                 print "<td class=\"link nochange\">";
4672                                         } else {
4673                                                 print "<td class=\"link\">";
4674                                         }
4675                                         print $cgi->a({-href => href(action=>"blobdiff",
4676                                                                      hash=>$diff->{'to_id'},
4677                                                                      hash_parent=>$from_hash,
4678                                                                      hash_base=>$hash,
4679                                                                      hash_parent_base=>$hash_parent,
4680                                                                      file_name=>$diff->{'to_file'},
4681                                                                      file_parent=>$from_path)},
4682                                                       "diff" . ($i+1)) .
4683                                               " | </td>\n";
4684                                 }
4685                         }
4686
4687                         print "<td class=\"link\">";
4688                         if ($not_deleted) {
4689                                 print $cgi->a({-href => href(action=>"blob",
4690                                                              hash=>$diff->{'to_id'},
4691                                                              file_name=>$diff->{'to_file'},
4692                                                              hash_base=>$hash)},
4693                                               "blob");
4694                                 print " | " if ($has_history);
4695                         }
4696                         if ($has_history) {
4697                                 print $cgi->a({-href => href(action=>"history",
4698                                                              file_name=>$diff->{'to_file'},
4699                                                              hash_base=>$hash)},
4700                                               "history");
4701                         }
4702                         print "</td>\n";
4703
4704                         print "</tr>\n";
4705                         next; # instead of 'else' clause, to avoid extra indent
4706                 }
4707                 # else ordinary diff
4708
4709                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4710                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4711                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4712                         $to_mode_oct = oct $diff->{'to_mode'};
4713                         if (S_ISREG($to_mode_oct)) { # only for regular file
4714                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4715                         }
4716                         $to_file_type = file_type($diff->{'to_mode'});
4717                 }
4718                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4719                         $from_mode_oct = oct $diff->{'from_mode'};
4720                         if (S_ISREG($from_mode_oct)) { # only for regular file
4721                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4722                         }
4723                         $from_file_type = file_type($diff->{'from_mode'});
4724                 }
4725
4726                 if ($diff->{'status'} eq "A") { # created
4727                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4728                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4729                         $mode_chng   .= "]</span>";
4730                         print "<td>";
4731                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4732                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4733                                       -class => "list"}, esc_path($diff->{'file'}));
4734                         print "</td>\n";
4735                         print "<td>$mode_chng</td>\n";
4736                         print "<td class=\"link\">";
4737                         if ($action eq 'commitdiff') {
4738                                 # link to patch
4739                                 $patchno++;
4740                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4741                                               "patch") .
4742                                       " | ";
4743                         }
4744                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4745                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4746                                       "blob");
4747                         print "</td>\n";
4748
4749                 } elsif ($diff->{'status'} eq "D") { # deleted
4750                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4751                         print "<td>";
4752                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4753                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4754                                        -class => "list"}, esc_path($diff->{'file'}));
4755                         print "</td>\n";
4756                         print "<td>$mode_chng</td>\n";
4757                         print "<td class=\"link\">";
4758                         if ($action eq 'commitdiff') {
4759                                 # link to patch
4760                                 $patchno++;
4761                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4762                                               "patch") .
4763                                       " | ";
4764                         }
4765                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4766                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4767                                       "blob") . " | ";
4768                         if ($have_blame) {
4769                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4770                                                              file_name=>$diff->{'file'})},
4771                                               "blame") . " | ";
4772                         }
4773                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4774                                                      file_name=>$diff->{'file'})},
4775                                       "history");
4776                         print "</td>\n";
4777
4778                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4779                         my $mode_chnge = "";
4780                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4781                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4782                                 if ($from_file_type ne $to_file_type) {
4783                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4784                                 }
4785                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4786                                         if ($from_mode_str && $to_mode_str) {
4787                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4788                                         } elsif ($to_mode_str) {
4789                                                 $mode_chnge .= " mode: $to_mode_str";
4790                                         }
4791                                 }
4792                                 $mode_chnge .= "]</span>\n";
4793                         }
4794                         print "<td>";
4795                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4796                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4797                                       -class => "list"}, esc_path($diff->{'file'}));
4798                         print "</td>\n";
4799                         print "<td>$mode_chnge</td>\n";
4800                         print "<td class=\"link\">";
4801                         if ($action eq 'commitdiff') {
4802                                 # link to patch
4803                                 $patchno++;
4804                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4805                                               "patch") .
4806                                       " | ";
4807                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4808                                 # "commit" view and modified file (not onlu mode changed)
4809                                 print $cgi->a({-href => href(action=>"blobdiff",
4810                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4811                                                              hash_base=>$hash, hash_parent_base=>$parent,
4812                                                              file_name=>$diff->{'file'})},
4813                                               "diff") .
4814                                       " | ";
4815                         }
4816                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4817                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4818                                        "blob") . " | ";
4819                         if ($have_blame) {
4820                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4821                                                              file_name=>$diff->{'file'})},
4822                                               "blame") . " | ";
4823                         }
4824                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4825                                                      file_name=>$diff->{'file'})},
4826                                       "history");
4827                         print "</td>\n";
4828
4829                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4830                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4831                         my $nstatus = $status_name{$diff->{'status'}};
4832                         my $mode_chng = "";
4833                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4834                                 # mode also for directories, so we cannot use $to_mode_str
4835                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4836                         }
4837                         print "<td>" .
4838                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4839                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4840                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4841                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4842                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4843                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4844                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4845                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4846                               "<td class=\"link\">";
4847                         if ($action eq 'commitdiff') {
4848                                 # link to patch
4849                                 $patchno++;
4850                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4851                                               "patch") .
4852                                       " | ";
4853                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4854                                 # "commit" view and modified file (not only pure rename or copy)
4855                                 print $cgi->a({-href => href(action=>"blobdiff",
4856                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4857                                                              hash_base=>$hash, hash_parent_base=>$parent,
4858                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4859                                               "diff") .
4860                                       " | ";
4861                         }
4862                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4863                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4864                                       "blob") . " | ";
4865                         if ($have_blame) {
4866                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4867                                                              file_name=>$diff->{'to_file'})},
4868                                               "blame") . " | ";
4869                         }
4870                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4871                                                     file_name=>$diff->{'to_file'})},
4872                                       "history");
4873                         print "</td>\n";
4874
4875                 } # we should not encounter Unmerged (U) or Unknown (X) status
4876                 print "</tr>\n";
4877         }
4878         print "</tbody>" if $has_header;
4879         print "</table>\n";
4880 }
4881
4882 sub print_sidebyside_diff_chunk {
4883         my @chunk = @_;
4884         my (@ctx, @rem, @add);
4885
4886         return unless @chunk;
4887
4888         # incomplete last line might be among removed or added lines,
4889         # or both, or among context lines: find which
4890         for (my $i = 1; $i < @chunk; $i++) {
4891                 if ($chunk[$i][0] eq 'incomplete') {
4892                         $chunk[$i][0] = $chunk[$i-1][0];
4893                 }
4894         }
4895
4896         # guardian
4897         push @chunk, ["", ""];
4898
4899         foreach my $line_info (@chunk) {
4900                 my ($class, $line) = @$line_info;
4901
4902                 # print chunk headers
4903                 if ($class && $class eq 'chunk_header') {
4904                         print $line;
4905                         next;
4906                 }
4907
4908                 ## print from accumulator when type of class of lines change
4909                 # empty contents block on start rem/add block, or end of chunk
4910                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4911                         print join '',
4912                                 '<div class="chunk_block ctx">',
4913                                         '<div class="old">',
4914                                         @ctx,
4915                                         '</div>',
4916                                         '<div class="new">',
4917                                         @ctx,
4918                                         '</div>',
4919                                 '</div>';
4920                         @ctx = ();
4921                 }
4922                 # empty add/rem block on start context block, or end of chunk
4923                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4924                         if (!@add) {
4925                                 # pure removal
4926                                 print join '',
4927                                         '<div class="chunk_block rem">',
4928                                                 '<div class="old">',
4929                                                 @rem,
4930                                                 '</div>',
4931                                         '</div>';
4932                         } elsif (!@rem) {
4933                                 # pure addition
4934                                 print join '',
4935                                         '<div class="chunk_block add">',
4936                                                 '<div class="new">',
4937                                                 @add,
4938                                                 '</div>',
4939                                         '</div>';
4940                         } else {
4941                                 # assume that it is change
4942                                 print join '',
4943                                         '<div class="chunk_block chg">',
4944                                                 '<div class="old">',
4945                                                 @rem,
4946                                                 '</div>',
4947                                                 '<div class="new">',
4948                                                 @add,
4949                                                 '</div>',
4950                                         '</div>';
4951                         }
4952                         @rem = @add = ();
4953                 }
4954
4955                 ## adding lines to accumulator
4956                 # guardian value
4957                 last unless $line;
4958                 # rem, add or change
4959                 if ($class eq 'rem') {
4960                         push @rem, $line;
4961                 } elsif ($class eq 'add') {
4962                         push @add, $line;
4963                 }
4964                 # context line
4965                 if ($class eq 'ctx') {
4966                         push @ctx, $line;
4967                 }
4968         }
4969 }
4970
4971 sub git_patchset_body {
4972         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4973         my ($hash_parent) = $hash_parents[0];
4974
4975         my $is_combined = (@hash_parents > 1);
4976         my $patch_idx = 0;
4977         my $patch_number = 0;
4978         my $patch_line;
4979         my $diffinfo;
4980         my $to_name;
4981         my (%from, %to);
4982         my @chunk; # for side-by-side diff
4983
4984         print "<div class=\"patchset\">\n";
4985
4986         # skip to first patch
4987         while ($patch_line = <$fd>) {
4988                 chomp $patch_line;
4989
4990                 last if ($patch_line =~ m/^diff /);
4991         }
4992
4993  PATCH:
4994         while ($patch_line) {
4995
4996                 # parse "git diff" header line
4997                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4998                         # $1 is from_name, which we do not use
4999                         $to_name = unquote($2);
5000                         $to_name =~ s!^b/!!;
5001                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5002                         # $1 is 'cc' or 'combined', which we do not use
5003                         $to_name = unquote($2);
5004                 } else {
5005                         $to_name = undef;
5006                 }
5007
5008                 # check if current patch belong to current raw line
5009                 # and parse raw git-diff line if needed
5010                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5011                         # this is continuation of a split patch
5012                         print "<div class=\"patch cont\">\n";
5013                 } else {
5014                         # advance raw git-diff output if needed
5015                         $patch_idx++ if defined $diffinfo;
5016
5017                         # read and prepare patch information
5018                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5019
5020                         # compact combined diff output can have some patches skipped
5021                         # find which patch (using pathname of result) we are at now;
5022                         if ($is_combined) {
5023                                 while ($to_name ne $diffinfo->{'to_file'}) {
5024                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5025                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5026                                               "</div>\n";  # class="patch"
5027
5028                                         $patch_idx++;
5029                                         $patch_number++;
5030
5031                                         last if $patch_idx > $#$difftree;
5032                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5033                                 }
5034                         }
5035
5036                         # modifies %from, %to hashes
5037                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5038
5039                         # this is first patch for raw difftree line with $patch_idx index
5040                         # we index @$difftree array from 0, but number patches from 1
5041                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5042                 }
5043
5044                 # git diff header
5045                 #assert($patch_line =~ m/^diff /) if DEBUG;
5046                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5047                 $patch_number++;
5048                 # print "git diff" header
5049                 print format_git_diff_header_line($patch_line, $diffinfo,
5050                                                   \%from, \%to);
5051
5052                 # print extended diff header
5053                 print "<div class=\"diff extended_header\">\n";
5054         EXTENDED_HEADER:
5055                 while ($patch_line = <$fd>) {
5056                         chomp $patch_line;
5057
5058                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5059
5060                         print format_extended_diff_header_line($patch_line, $diffinfo,
5061                                                                \%from, \%to);
5062                 }
5063                 print "</div>\n"; # class="diff extended_header"
5064
5065                 # from-file/to-file diff header
5066                 if (! $patch_line) {
5067                         print "</div>\n"; # class="patch"
5068                         last PATCH;
5069                 }
5070                 next PATCH if ($patch_line =~ m/^diff /);
5071                 #assert($patch_line =~ m/^---/) if DEBUG;
5072
5073                 my $last_patch_line = $patch_line;
5074                 $patch_line = <$fd>;
5075                 chomp $patch_line;
5076                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5077
5078                 print format_diff_from_to_header($last_patch_line, $patch_line,
5079                                                  $diffinfo, \%from, \%to,
5080                                                  @hash_parents);
5081
5082                 # the patch itself
5083         LINE:
5084                 while ($patch_line = <$fd>) {
5085                         chomp $patch_line;
5086
5087                         next PATCH if ($patch_line =~ m/^diff /);
5088
5089                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5090                         my $diff_classes = "diff";
5091                         $diff_classes .= " $class" if ($class);
5092                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5093
5094                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5095                                 if ($class eq 'chunk_header') {
5096                                         print_sidebyside_diff_chunk(@chunk);
5097                                         @chunk = ( [ $class, $line ] );
5098                                 } else {
5099                                         push @chunk, [ $class, $line ];
5100                                 }
5101                         } else {
5102                                 # default 'inline' style and unknown styles
5103                                 print $line;
5104                         }
5105                 }
5106
5107         } continue {
5108                 if (@chunk) {
5109                         print_sidebyside_diff_chunk(@chunk);
5110                         @chunk = ();
5111                 }
5112                 print "</div>\n"; # class="patch"
5113         }
5114
5115         # for compact combined (--cc) format, with chunk and patch simplification
5116         # the patchset might be empty, but there might be unprocessed raw lines
5117         for (++$patch_idx if $patch_number > 0;
5118              $patch_idx < @$difftree;
5119              ++$patch_idx) {
5120                 # read and prepare patch information
5121                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5122
5123                 # generate anchor for "patch" links in difftree / whatchanged part
5124                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5125                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5126                       "</div>\n";  # class="patch"
5127
5128                 $patch_number++;
5129         }
5130
5131         if ($patch_number == 0) {
5132                 if (@hash_parents > 1) {
5133                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5134                 } else {
5135                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5136                 }
5137         }
5138
5139         print "</div>\n"; # class="patchset"
5140 }
5141
5142 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5143
5144 # fills project list info (age, description, owner, category, forks)
5145 # for each project in the list, removing invalid projects from
5146 # returned list
5147 # NOTE: modifies $projlist, but does not remove entries from it
5148 sub fill_project_list_info {
5149         my $projlist = shift;
5150         my @projects;
5151
5152         my $show_ctags = gitweb_check_feature('ctags');
5153  PROJECT:
5154         foreach my $pr (@$projlist) {
5155                 my (@activity) = git_get_last_activity($pr->{'path'});
5156                 unless (@activity) {
5157                         next PROJECT;
5158                 }
5159                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5160                 if (!defined $pr->{'descr'}) {
5161                         my $descr = git_get_project_description($pr->{'path'}) || "";
5162                         $descr = to_utf8($descr);
5163                         $pr->{'descr_long'} = $descr;
5164                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5165                 }
5166                 if (!defined $pr->{'owner'}) {
5167                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5168                 }
5169                 if ($show_ctags) {
5170                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5171                 }
5172                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5173                         my $cat = git_get_project_category($pr->{'path'}) ||
5174                                                            $project_list_default_category;
5175                         $pr->{'category'} = to_utf8($cat);
5176                 }
5177
5178                 push @projects, $pr;
5179         }
5180
5181         return @projects;
5182 }
5183
5184 sub sort_projects_list {
5185         my ($projlist, $order) = @_;
5186         my @projects;
5187
5188         my %order_info = (
5189                 project => { key => 'path', type => 'str' },
5190                 descr => { key => 'descr_long', type => 'str' },
5191                 owner => { key => 'owner', type => 'str' },
5192                 age => { key => 'age', type => 'num' }
5193         );
5194         my $oi = $order_info{$order};
5195         return @$projlist unless defined $oi;
5196         if ($oi->{'type'} eq 'str') {
5197                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5198         } else {
5199                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5200         }
5201
5202         return @projects;
5203 }
5204
5205 # returns a hash of categories, containing the list of project
5206 # belonging to each category
5207 sub build_projlist_by_category {
5208         my ($projlist, $from, $to) = @_;
5209         my %categories;
5210
5211         $from = 0 unless defined $from;
5212         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5213
5214         for (my $i = $from; $i <= $to; $i++) {
5215                 my $pr = $projlist->[$i];
5216                 push @{$categories{ $pr->{'category'} }}, $pr;
5217         }
5218
5219         return wantarray ? %categories : \%categories;
5220 }
5221
5222 # print 'sort by' <th> element, generating 'sort by $name' replay link
5223 # if that order is not selected
5224 sub print_sort_th {
5225         print format_sort_th(@_);
5226 }
5227
5228 sub format_sort_th {
5229         my ($name, $order, $header) = @_;
5230         my $sort_th = "";
5231         $header ||= ucfirst($name);
5232
5233         if ($order eq $name) {
5234                 $sort_th .= "<th>$header</th>\n";
5235         } else {
5236                 $sort_th .= "<th>" .
5237                             $cgi->a({-href => href(-replay=>1, order=>$name),
5238                                      -class => "header"}, $header) .
5239                             "</th>\n";
5240         }
5241
5242         return $sort_th;
5243 }
5244
5245 sub git_project_list_rows {
5246         my ($projlist, $from, $to, $check_forks) = @_;
5247
5248         $from = 0 unless defined $from;
5249         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5250
5251         my $alternate = 1;
5252         for (my $i = $from; $i <= $to; $i++) {
5253                 my $pr = $projlist->[$i];
5254
5255                 if ($alternate) {
5256                         print "<tr class=\"dark\">\n";
5257                 } else {
5258                         print "<tr class=\"light\">\n";
5259                 }
5260                 $alternate ^= 1;
5261
5262                 if ($check_forks) {
5263                         print "<td>";
5264                         if ($pr->{'forks'}) {
5265                                 my $nforks = scalar @{$pr->{'forks'}};
5266                                 if ($nforks > 0) {
5267                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5268                                                        -title => "$nforks forks"}, "+");
5269                                 } else {
5270                                         print $cgi->span({-title => "$nforks forks"}, "+");
5271                                 }
5272                         }
5273                         print "</td>\n";
5274                 }
5275                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5276                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5277                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5278                                         -class => "list", -title => $pr->{'descr_long'}},
5279                                         esc_html($pr->{'descr'})) . "</td>\n" .
5280                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5281                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5282                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5283                       "<td class=\"link\">" .
5284                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5285                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5286                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5287                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5288                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5289                       "</td>\n" .
5290                       "</tr>\n";
5291         }
5292 }
5293
5294 sub git_project_list_body {
5295         # actually uses global variable $project
5296         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5297         my @projects = @$projlist;
5298
5299         my $check_forks = gitweb_check_feature('forks');
5300         my $show_ctags  = gitweb_check_feature('ctags');
5301         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5302         $check_forks = undef
5303                 if ($tagfilter || $searchtext);
5304
5305         # filtering out forks before filling info allows to do less work
5306         @projects = filter_forks_from_projects_list(\@projects)
5307                 if ($check_forks);
5308         @projects = fill_project_list_info(\@projects);
5309         # searching projects require filling to be run before it
5310         @projects = search_projects_list(\@projects,
5311                                          'searchtext' => $searchtext,
5312                                          'tagfilter'  => $tagfilter)
5313                 if ($tagfilter || $searchtext);
5314
5315         $order ||= $default_projects_order;
5316         $from = 0 unless defined $from;
5317         $to = $#projects if (!defined $to || $#projects < $to);
5318
5319         # short circuit
5320         if ($from > $to) {
5321                 print "<center>\n".
5322                       "<b>No such projects found</b><br />\n".
5323                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5324                       "</center>\n<br />\n";
5325                 return;
5326         }
5327
5328         @projects = sort_projects_list(\@projects, $order);
5329
5330         if ($show_ctags) {
5331                 my $ctags = git_gather_all_ctags(\@projects);
5332                 my $cloud = git_populate_project_tagcloud($ctags);
5333                 print git_show_project_tagcloud($cloud, 64);
5334         }
5335
5336         print "<table class=\"project_list\">\n";
5337         unless ($no_header) {
5338                 print "<tr>\n";
5339                 if ($check_forks) {
5340                         print "<th></th>\n";
5341                 }
5342                 print_sort_th('project', $order, 'Project');
5343                 print_sort_th('descr', $order, 'Description');
5344                 print_sort_th('owner', $order, 'Owner');
5345                 print_sort_th('age', $order, 'Last Change');
5346                 print "<th></th>\n" . # for links
5347                       "</tr>\n";
5348         }
5349
5350         if ($projects_list_group_categories) {
5351                 # only display categories with projects in the $from-$to window
5352                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5353                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5354                 foreach my $cat (sort keys %categories) {
5355                         unless ($cat eq "") {
5356                                 print "<tr>\n";
5357                                 if ($check_forks) {
5358                                         print "<td></td>\n";
5359                                 }
5360                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5361                                 print "</tr>\n";
5362                         }
5363
5364                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5365                 }
5366         } else {
5367                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5368         }
5369
5370         if (defined $extra) {
5371                 print "<tr>\n";
5372                 if ($check_forks) {
5373                         print "<td></td>\n";
5374                 }
5375                 print "<td colspan=\"5\">$extra</td>\n" .
5376                       "</tr>\n";
5377         }
5378         print "</table>\n";
5379 }
5380
5381 sub git_log_body {
5382         # uses global variable $project
5383         my ($commitlist, $from, $to, $refs, $extra) = @_;
5384
5385         $from = 0 unless defined $from;
5386         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5387
5388         for (my $i = 0; $i <= $to; $i++) {
5389                 my %co = %{$commitlist->[$i]};
5390                 next if !%co;
5391                 my $commit = $co{'id'};
5392                 my $ref = format_ref_marker($refs, $commit);
5393                 git_print_header_div('commit',
5394                                "<span class=\"age\">$co{'age_string'}</span>" .
5395                                esc_html($co{'title'}) . $ref,
5396                                $commit);
5397                 print "<div class=\"title_text\">\n" .
5398                       "<div class=\"log_link\">\n" .
5399                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5400                       " | " .
5401                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5402                       " | " .
5403                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5404                       "<br/>\n" .
5405                       "</div>\n";
5406                       git_print_authorship(\%co, -tag => 'span');
5407                       print "<br/>\n</div>\n";
5408
5409                 print "<div class=\"log_body\">\n";
5410                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5411                 print "</div>\n";
5412         }
5413         if ($extra) {
5414                 print "<div class=\"page_nav\">\n";
5415                 print "$extra\n";
5416                 print "</div>\n";
5417         }
5418 }
5419
5420 sub git_shortlog_body {
5421         # uses global variable $project
5422         my ($commitlist, $from, $to, $refs, $extra) = @_;
5423
5424         $from = 0 unless defined $from;
5425         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5426
5427         print "<table class=\"shortlog\">\n";
5428         my $alternate = 1;
5429         for (my $i = $from; $i <= $to; $i++) {
5430                 my %co = %{$commitlist->[$i]};
5431                 my $commit = $co{'id'};
5432                 my $ref = format_ref_marker($refs, $commit);
5433                 if ($alternate) {
5434                         print "<tr class=\"dark\">\n";
5435                 } else {
5436                         print "<tr class=\"light\">\n";
5437                 }
5438                 $alternate ^= 1;
5439                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5440                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5441                       format_author_html('td', \%co, 10) . "<td>";
5442                 print format_subject_html($co{'title'}, $co{'title_short'},
5443                                           href(action=>"commit", hash=>$commit), $ref);
5444                 print "</td>\n" .
5445                       "<td class=\"link\">" .
5446                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5447                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5448                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5449                 my $snapshot_links = format_snapshot_links($commit);
5450                 if (defined $snapshot_links) {
5451                         print " | " . $snapshot_links;
5452                 }
5453                 print "</td>\n" .
5454                       "</tr>\n";
5455         }
5456         if (defined $extra) {
5457                 print "<tr>\n" .
5458                       "<td colspan=\"4\">$extra</td>\n" .
5459                       "</tr>\n";
5460         }
5461         print "</table>\n";
5462 }
5463
5464 sub git_history_body {
5465         # Warning: assumes constant type (blob or tree) during history
5466         my ($commitlist, $from, $to, $refs, $extra,
5467             $file_name, $file_hash, $ftype) = @_;
5468
5469         $from = 0 unless defined $from;
5470         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5471
5472         print "<table class=\"history\">\n";
5473         my $alternate = 1;
5474         for (my $i = $from; $i <= $to; $i++) {
5475                 my %co = %{$commitlist->[$i]};
5476                 if (!%co) {
5477                         next;
5478                 }
5479                 my $commit = $co{'id'};
5480
5481                 my $ref = format_ref_marker($refs, $commit);
5482
5483                 if ($alternate) {
5484                         print "<tr class=\"dark\">\n";
5485                 } else {
5486                         print "<tr class=\"light\">\n";
5487                 }
5488                 $alternate ^= 1;
5489                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5490         # shortlog:   format_author_html('td', \%co, 10)
5491                       format_author_html('td', \%co, 15, 3) . "<td>";
5492                 # originally git_history used chop_str($co{'title'}, 50)
5493                 print format_subject_html($co{'title'}, $co{'title_short'},
5494                                           href(action=>"commit", hash=>$commit), $ref);
5495                 print "</td>\n" .
5496                       "<td class=\"link\">" .
5497                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5498                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5499
5500                 if ($ftype eq 'blob') {
5501                         my $blob_current = $file_hash;
5502                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5503                         if (defined $blob_current && defined $blob_parent &&
5504                                         $blob_current ne $blob_parent) {
5505                                 print " | " .
5506                                         $cgi->a({-href => href(action=>"blobdiff",
5507                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5508                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5509                                                                file_name=>$file_name)},
5510                                                 "diff to current");
5511                         }
5512                 }
5513                 print "</td>\n" .
5514                       "</tr>\n";
5515         }
5516         if (defined $extra) {
5517                 print "<tr>\n" .
5518                       "<td colspan=\"4\">$extra</td>\n" .
5519                       "</tr>\n";
5520         }
5521         print "</table>\n";
5522 }
5523
5524 sub git_tags_body {
5525         # uses global variable $project
5526         my ($taglist, $from, $to, $extra) = @_;
5527         $from = 0 unless defined $from;
5528         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5529
5530         print "<table class=\"tags\">\n";
5531         my $alternate = 1;
5532         for (my $i = $from; $i <= $to; $i++) {
5533                 my $entry = $taglist->[$i];
5534                 my %tag = %$entry;
5535                 my $comment = $tag{'subject'};
5536                 my $comment_short;
5537                 if (defined $comment) {
5538                         $comment_short = chop_str($comment, 30, 5);
5539                 }
5540                 if ($alternate) {
5541                         print "<tr class=\"dark\">\n";
5542                 } else {
5543                         print "<tr class=\"light\">\n";
5544                 }
5545                 $alternate ^= 1;
5546                 if (defined $tag{'age'}) {
5547                         print "<td><i>$tag{'age'}</i></td>\n";
5548                 } else {
5549                         print "<td></td>\n";
5550                 }
5551                 print "<td>" .
5552                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5553                                -class => "list name"}, esc_html($tag{'name'})) .
5554                       "</td>\n" .
5555                       "<td>";
5556                 if (defined $comment) {
5557                         print format_subject_html($comment, $comment_short,
5558                                                   href(action=>"tag", hash=>$tag{'id'}));
5559                 }
5560                 print "</td>\n" .
5561                       "<td class=\"selflink\">";
5562                 if ($tag{'type'} eq "tag") {
5563                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5564                 } else {
5565                         print "&nbsp;";
5566                 }
5567                 print "</td>\n" .
5568                       "<td class=\"link\">" . " | " .
5569                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5570                 if ($tag{'reftype'} eq "commit") {
5571                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5572                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5573                 } elsif ($tag{'reftype'} eq "blob") {
5574                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5575                 }
5576                 print "</td>\n" .
5577                       "</tr>";
5578         }
5579         if (defined $extra) {
5580                 print "<tr>\n" .
5581                       "<td colspan=\"5\">$extra</td>\n" .
5582                       "</tr>\n";
5583         }
5584         print "</table>\n";
5585 }
5586
5587 sub git_heads_body {
5588         # uses global variable $project
5589         my ($headlist, $head, $from, $to, $extra) = @_;
5590         $from = 0 unless defined $from;
5591         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5592
5593         print "<table class=\"heads\">\n";
5594         my $alternate = 1;
5595         for (my $i = $from; $i <= $to; $i++) {
5596                 my $entry = $headlist->[$i];
5597                 my %ref = %$entry;
5598                 my $curr = $ref{'id'} eq $head;
5599                 if ($alternate) {
5600                         print "<tr class=\"dark\">\n";
5601                 } else {
5602                         print "<tr class=\"light\">\n";
5603                 }
5604                 $alternate ^= 1;
5605                 print "<td><i>$ref{'age'}</i></td>\n" .
5606                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5607                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5608                                -class => "list name"},esc_html($ref{'name'})) .
5609                       "</td>\n" .
5610                       "<td class=\"link\">" .
5611                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5612                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5613                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5614                       "</td>\n" .
5615                       "</tr>";
5616         }
5617         if (defined $extra) {
5618                 print "<tr>\n" .
5619                       "<td colspan=\"3\">$extra</td>\n" .
5620                       "</tr>\n";
5621         }
5622         print "</table>\n";
5623 }
5624
5625 # Display a single remote block
5626 sub git_remote_block {
5627         my ($remote, $rdata, $limit, $head) = @_;
5628
5629         my $heads = $rdata->{'heads'};
5630         my $fetch = $rdata->{'fetch'};
5631         my $push = $rdata->{'push'};
5632
5633         my $urls_table = "<table class=\"projects_list\">\n" ;
5634
5635         if (defined $fetch) {
5636                 if ($fetch eq $push) {
5637                         $urls_table .= format_repo_url("URL", $fetch);
5638                 } else {
5639                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5640                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5641                 }
5642         } elsif (defined $push) {
5643                 $urls_table .= format_repo_url("Push URL", $push);
5644         } else {
5645                 $urls_table .= format_repo_url("", "No remote URL");
5646         }
5647
5648         $urls_table .= "</table>\n";
5649
5650         my $dots;
5651         if (defined $limit && $limit < @$heads) {
5652                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5653         }
5654
5655         print $urls_table;
5656         git_heads_body($heads, $head, 0, $limit, $dots);
5657 }
5658
5659 # Display a list of remote names with the respective fetch and push URLs
5660 sub git_remotes_list {
5661         my ($remotedata, $limit) = @_;
5662         print "<table class=\"heads\">\n";
5663         my $alternate = 1;
5664         my @remotes = sort keys %$remotedata;
5665
5666         my $limited = $limit && $limit < @remotes;
5667
5668         $#remotes = $limit - 1 if $limited;
5669
5670         while (my $remote = shift @remotes) {
5671                 my $rdata = $remotedata->{$remote};
5672                 my $fetch = $rdata->{'fetch'};
5673                 my $push = $rdata->{'push'};
5674                 if ($alternate) {
5675                         print "<tr class=\"dark\">\n";
5676                 } else {
5677                         print "<tr class=\"light\">\n";
5678                 }
5679                 $alternate ^= 1;
5680                 print "<td>" .
5681                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5682                                -class=> "list name"},esc_html($remote)) .
5683                       "</td>";
5684                 print "<td class=\"link\">" .
5685                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5686                       " | " .
5687                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5688                       "</td>";
5689
5690                 print "</tr>\n";
5691         }
5692
5693         if ($limited) {
5694                 print "<tr>\n" .
5695                       "<td colspan=\"3\">" .
5696                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5697                       "</td>\n" . "</tr>\n";
5698         }
5699
5700         print "</table>";
5701 }
5702
5703 # Display remote heads grouped by remote, unless there are too many
5704 # remotes, in which case we only display the remote names
5705 sub git_remotes_body {
5706         my ($remotedata, $limit, $head) = @_;
5707         if ($limit and $limit < keys %$remotedata) {
5708                 git_remotes_list($remotedata, $limit);
5709         } else {
5710                 fill_remote_heads($remotedata);
5711                 while (my ($remote, $rdata) = each %$remotedata) {
5712                         git_print_section({-class=>"remote", -id=>$remote},
5713                                 ["remotes", $remote, $remote], sub {
5714                                         git_remote_block($remote, $rdata, $limit, $head);
5715                                 });
5716                 }
5717         }
5718 }
5719
5720 sub git_search_message {
5721         my %co = @_;
5722
5723         my $greptype;
5724         if ($searchtype eq 'commit') {
5725                 $greptype = "--grep=";
5726         } elsif ($searchtype eq 'author') {
5727                 $greptype = "--author=";
5728         } elsif ($searchtype eq 'committer') {
5729                 $greptype = "--committer=";
5730         }
5731         $greptype .= $searchtext;
5732         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5733                                        $greptype, '--regexp-ignore-case',
5734                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5735
5736         my $paging_nav = '';
5737         if ($page > 0) {
5738                 $paging_nav .=
5739                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5740                                 "first") .
5741                         " &sdot; " .
5742                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5743                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5744         } else {
5745                 $paging_nav .= "first &sdot; prev";
5746         }
5747         my $next_link = '';
5748         if ($#commitlist >= 100) {
5749                 $next_link =
5750                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5751                                  -accesskey => "n", -title => "Alt-n"}, "next");
5752                 $paging_nav .= " &sdot; $next_link";
5753         } else {
5754                 $paging_nav .= " &sdot; next";
5755         }
5756
5757         git_header_html();
5758
5759         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5760         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5761         if ($page == 0 && !@commitlist) {
5762                 print "<p>No match.</p>\n";
5763         } else {
5764                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5765         }
5766
5767         git_footer_html();
5768 }
5769
5770 sub git_search_changes {
5771         my %co = @_;
5772
5773         local $/ = "\n";
5774         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5775                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5776                 ($search_use_regexp ? '--pickaxe-regex' : ())
5777                         or die_error(500, "Open git-log failed");
5778
5779         git_header_html();
5780
5781         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5782         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5783
5784         print "<table class=\"pickaxe search\">\n";
5785         my $alternate = 1;
5786         undef %co;
5787         my @files;
5788         while (my $line = <$fd>) {
5789                 chomp $line;
5790                 next unless $line;
5791
5792                 my %set = parse_difftree_raw_line($line);
5793                 if (defined $set{'commit'}) {
5794                         # finish previous commit
5795                         if (%co) {
5796                                 print "</td>\n" .
5797                                       "<td class=\"link\">" .
5798                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5799                                               "commit") .
5800                                       " | " .
5801                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5802                                                              hash_base=>$co{'id'})},
5803                                               "tree") .
5804                                       "</td>\n" .
5805                                       "</tr>\n";
5806                         }
5807
5808                         if ($alternate) {
5809                                 print "<tr class=\"dark\">\n";
5810                         } else {
5811                                 print "<tr class=\"light\">\n";
5812                         }
5813                         $alternate ^= 1;
5814                         %co = parse_commit($set{'commit'});
5815                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5816                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5817                               "<td><i>$author</i></td>\n" .
5818                               "<td>" .
5819                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5820                                       -class => "list subject"},
5821                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5822                 } elsif (defined $set{'to_id'}) {
5823                         next if ($set{'to_id'} =~ m/^0{40}$/);
5824
5825                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5826                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5827                                       -class => "list"},
5828                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5829                               "<br/>\n";
5830                 }
5831         }
5832         close $fd;
5833
5834         # finish last commit (warning: repetition!)
5835         if (%co) {
5836                 print "</td>\n" .
5837                       "<td class=\"link\">" .
5838                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5839                               "commit") .
5840                       " | " .
5841                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5842                                              hash_base=>$co{'id'})},
5843                               "tree") .
5844                       "</td>\n" .
5845                       "</tr>\n";
5846         }
5847
5848         print "</table>\n";
5849
5850         git_footer_html();
5851 }
5852
5853 sub git_search_files {
5854         my %co = @_;
5855
5856         local $/ = "\n";
5857         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5858                 $search_use_regexp ? ('-E', '-i') : '-F',
5859                 $searchtext, $co{'tree'}
5860                         or die_error(500, "Open git-grep failed");
5861
5862         git_header_html();
5863
5864         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5865         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5866
5867         print "<table class=\"grep_search\">\n";
5868         my $alternate = 1;
5869         my $matches = 0;
5870         my $lastfile = '';
5871         while (my $line = <$fd>) {
5872                 chomp $line;
5873                 my ($file, $file_href, $lno, $ltext, $binary);
5874                 last if ($matches++ > 1000);
5875                 if ($line =~ /^Binary file (.+) matches$/) {
5876                         $file = $1;
5877                         $binary = 1;
5878                 } else {
5879                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5880                         $file =~ s/^$co{'tree'}://;
5881                 }
5882                 if ($file ne $lastfile) {
5883                         $lastfile and print "</td></tr>\n";
5884                         if ($alternate++) {
5885                                 print "<tr class=\"dark\">\n";
5886                         } else {
5887                                 print "<tr class=\"light\">\n";
5888                         }
5889                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5890                                           file_name=>$file);
5891                         print "<td class=\"list\">".
5892                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5893                         print "</td><td>\n";
5894                         $lastfile = $file;
5895                 }
5896                 if ($binary) {
5897                         print "<div class=\"binary\">Binary file</div>\n";
5898                 } else {
5899                         $ltext = untabify($ltext);
5900                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5901                                 $ltext = esc_html($1, -nbsp=>1);
5902                                 $ltext .= '<span class="match">';
5903                                 $ltext .= esc_html($2, -nbsp=>1);
5904                                 $ltext .= '</span>';
5905                                 $ltext .= esc_html($3, -nbsp=>1);
5906                         } else {
5907                                 $ltext = esc_html($ltext, -nbsp=>1);
5908                         }
5909                         print "<div class=\"pre\">" .
5910                                 $cgi->a({-href => $file_href.'#l'.$lno,
5911                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5912                                 ' ' .  $ltext . "</div>\n";
5913                 }
5914         }
5915         if ($lastfile) {
5916                 print "</td></tr>\n";
5917                 if ($matches > 1000) {
5918                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5919                 }
5920         } else {
5921                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5922         }
5923         close $fd;
5924
5925         print "</table>\n";
5926
5927         git_footer_html();
5928 }
5929
5930 sub git_search_grep_body {
5931         my ($commitlist, $from, $to, $extra) = @_;
5932         $from = 0 unless defined $from;
5933         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5934
5935         print "<table class=\"commit_search\">\n";
5936         my $alternate = 1;
5937         for (my $i = $from; $i <= $to; $i++) {
5938                 my %co = %{$commitlist->[$i]};
5939                 if (!%co) {
5940                         next;
5941                 }
5942                 my $commit = $co{'id'};
5943                 if ($alternate) {
5944                         print "<tr class=\"dark\">\n";
5945                 } else {
5946                         print "<tr class=\"light\">\n";
5947                 }
5948                 $alternate ^= 1;
5949                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5950                       format_author_html('td', \%co, 15, 5) .
5951                       "<td>" .
5952                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5953                                -class => "list subject"},
5954                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5955                 my $comment = $co{'comment'};
5956                 foreach my $line (@$comment) {
5957                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5958                                 my ($lead, $match, $trail) = ($1, $2, $3);
5959                                 $match = chop_str($match, 70, 5, 'center');
5960                                 my $contextlen = int((80 - length($match))/2);
5961                                 $contextlen = 30 if ($contextlen > 30);
5962                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5963                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5964
5965                                 $lead  = esc_html($lead);
5966                                 $match = esc_html($match);
5967                                 $trail = esc_html($trail);
5968
5969                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5970                         }
5971                 }
5972                 print "</td>\n" .
5973                       "<td class=\"link\">" .
5974                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5975                       " | " .
5976                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5977                       " | " .
5978                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5979                 print "</td>\n" .
5980                       "</tr>\n";
5981         }
5982         if (defined $extra) {
5983                 print "<tr>\n" .
5984                       "<td colspan=\"3\">$extra</td>\n" .
5985                       "</tr>\n";
5986         }
5987         print "</table>\n";
5988 }
5989
5990 ## ======================================================================
5991 ## ======================================================================
5992 ## actions
5993
5994 sub git_project_list {
5995         my $order = $input_params{'order'};
5996         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5997                 die_error(400, "Unknown order parameter");
5998         }
5999
6000         my @list = git_get_projects_list($project_filter, $strict_export);
6001         if (!@list) {
6002                 die_error(404, "No projects found");
6003         }
6004
6005         git_header_html();
6006         if (defined $home_text && -f $home_text) {
6007                 print "<div class=\"index_include\">\n";
6008                 insert_file($home_text);
6009                 print "</div>\n";
6010         }
6011         print $cgi->startform(-method => "get") .
6012               "<p class=\"projsearch\">Search:\n" .
6013               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6014               "</p>" .
6015               $cgi->end_form() . "\n";
6016         git_project_list_body(\@list, $order);
6017         git_footer_html();
6018 }
6019
6020 sub git_forks {
6021         my $order = $input_params{'order'};
6022         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6023                 die_error(400, "Unknown order parameter");
6024         }
6025
6026         my $filter = $project;
6027         $filter =~ s/\.git$//;
6028         my @list = git_get_projects_list($filter);
6029         if (!@list) {
6030                 die_error(404, "No forks found");
6031         }
6032
6033         git_header_html();
6034         git_print_page_nav('','');
6035         git_print_header_div('summary', "$project forks");
6036         git_project_list_body(\@list, $order);
6037         git_footer_html();
6038 }
6039
6040 sub git_project_index {
6041         my @projects = git_get_projects_list($project_filter, $strict_export);
6042         if (!@projects) {
6043                 die_error(404, "No projects found");
6044         }
6045
6046         print $cgi->header(
6047                 -type => 'text/plain',
6048                 -charset => 'utf-8',
6049                 -content_disposition => 'inline; filename="index.aux"');
6050
6051         foreach my $pr (@projects) {
6052                 if (!exists $pr->{'owner'}) {
6053                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6054                 }
6055
6056                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6057                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6058                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6059                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6060                 $path  =~ s/ /\+/g;
6061                 $owner =~ s/ /\+/g;
6062
6063                 print "$path $owner\n";
6064         }
6065 }
6066
6067 sub git_summary {
6068         my $descr = git_get_project_description($project) || "none";
6069         my %co = parse_commit("HEAD");
6070         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6071         my $head = $co{'id'};
6072         my $remote_heads = gitweb_check_feature('remote_heads');
6073
6074         my $owner = git_get_project_owner($project);
6075
6076         my $refs = git_get_references();
6077         # These get_*_list functions return one more to allow us to see if
6078         # there are more ...
6079         my @taglist  = git_get_tags_list(16);
6080         my @headlist = git_get_heads_list(16);
6081         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6082         my @forklist;
6083         my $check_forks = gitweb_check_feature('forks');
6084
6085         if ($check_forks) {
6086                 # find forks of a project
6087                 my $filter = $project;
6088                 $filter =~ s/\.git$//;
6089                 @forklist = git_get_projects_list($filter);
6090                 # filter out forks of forks
6091                 @forklist = filter_forks_from_projects_list(\@forklist)
6092                         if (@forklist);
6093         }
6094
6095         git_header_html();
6096         git_print_page_nav('summary','', $head);
6097
6098         print "<div class=\"title\">&nbsp;</div>\n";
6099         print "<table class=\"projects_list\">\n" .
6100               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6101               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6102         if (defined $cd{'rfc2822'}) {
6103                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6104                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6105         }
6106
6107         # use per project git URL list in $projectroot/$project/cloneurl
6108         # or make project git URL from git base URL and project name
6109         my $url_tag = "URL";
6110         my @url_list = git_get_project_url_list($project);
6111         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6112         foreach my $git_url (@url_list) {
6113                 next unless $git_url;
6114                 print format_repo_url($url_tag, $git_url);
6115                 $url_tag = "";
6116         }
6117
6118         # Tag cloud
6119         my $show_ctags = gitweb_check_feature('ctags');
6120         if ($show_ctags) {
6121                 my $ctags = git_get_project_ctags($project);
6122                 if (%$ctags) {
6123                         # without ability to add tags, don't show if there are none
6124                         my $cloud = git_populate_project_tagcloud($ctags);
6125                         print "<tr id=\"metadata_ctags\">" .
6126                               "<td>content tags</td>" .
6127                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6128                               "</tr>\n";
6129                 }
6130         }
6131
6132         print "</table>\n";
6133
6134         # If XSS prevention is on, we don't include README.html.
6135         # TODO: Allow a readme in some safe format.
6136         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6137                 print "<div class=\"title\">readme</div>\n" .
6138                       "<div class=\"readme\">\n";
6139                 insert_file("$projectroot/$project/README.html");
6140                 print "\n</div>\n"; # class="readme"
6141         }
6142
6143         # we need to request one more than 16 (0..15) to check if
6144         # those 16 are all
6145         my @commitlist = $head ? parse_commits($head, 17) : ();
6146         if (@commitlist) {
6147                 git_print_header_div('shortlog');
6148                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6149                                   $#commitlist <=  15 ? undef :
6150                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6151         }
6152
6153         if (@taglist) {
6154                 git_print_header_div('tags');
6155                 git_tags_body(\@taglist, 0, 15,
6156                               $#taglist <=  15 ? undef :
6157                               $cgi->a({-href => href(action=>"tags")}, "..."));
6158         }
6159
6160         if (@headlist) {
6161                 git_print_header_div('heads');
6162                 git_heads_body(\@headlist, $head, 0, 15,
6163                                $#headlist <= 15 ? undef :
6164                                $cgi->a({-href => href(action=>"heads")}, "..."));
6165         }
6166
6167         if (%remotedata) {
6168                 git_print_header_div('remotes');
6169                 git_remotes_body(\%remotedata, 15, $head);
6170         }
6171
6172         if (@forklist) {
6173                 git_print_header_div('forks');
6174                 git_project_list_body(\@forklist, 'age', 0, 15,
6175                                       $#forklist <= 15 ? undef :
6176                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6177                                       'no_header');
6178         }
6179
6180         git_footer_html();
6181 }
6182
6183 sub git_tag {
6184         my %tag = parse_tag($hash);
6185
6186         if (! %tag) {
6187                 die_error(404, "Unknown tag object");
6188         }
6189
6190         my $head = git_get_head_hash($project);
6191         git_header_html();
6192         git_print_page_nav('','', $head,undef,$head);
6193         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6194         print "<div class=\"title_text\">\n" .
6195               "<table class=\"object_header\">\n" .
6196               "<tr>\n" .
6197               "<td>object</td>\n" .
6198               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6199                                $tag{'object'}) . "</td>\n" .
6200               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6201                                               $tag{'type'}) . "</td>\n" .
6202               "</tr>\n";
6203         if (defined($tag{'author'})) {
6204                 git_print_authorship_rows(\%tag, 'author');
6205         }
6206         print "</table>\n\n" .
6207               "</div>\n";
6208         print "<div class=\"page_body\">";
6209         my $comment = $tag{'comment'};
6210         foreach my $line (@$comment) {
6211                 chomp $line;
6212                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6213         }
6214         print "</div>\n";
6215         git_footer_html();
6216 }
6217
6218 sub git_blame_common {
6219         my $format = shift || 'porcelain';
6220         if ($format eq 'porcelain' && $cgi->param('js')) {
6221                 $format = 'incremental';
6222                 $action = 'blame_incremental'; # for page title etc
6223         }
6224
6225         # permissions
6226         gitweb_check_feature('blame')
6227                 or die_error(403, "Blame view not allowed");
6228
6229         # error checking
6230         die_error(400, "No file name given") unless $file_name;
6231         $hash_base ||= git_get_head_hash($project);
6232         die_error(404, "Couldn't find base commit") unless $hash_base;
6233         my %co = parse_commit($hash_base)
6234                 or die_error(404, "Commit not found");
6235         my $ftype = "blob";
6236         if (!defined $hash) {
6237                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6238                         or die_error(404, "Error looking up file");
6239         } else {
6240                 $ftype = git_get_type($hash);
6241                 if ($ftype !~ "blob") {
6242                         die_error(400, "Object is not a blob");
6243                 }
6244         }
6245
6246         my $fd;
6247         if ($format eq 'incremental') {
6248                 # get file contents (as base)
6249                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6250                         or die_error(500, "Open git-cat-file failed");
6251         } elsif ($format eq 'data') {
6252                 # run git-blame --incremental
6253                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6254                         $hash_base, "--", $file_name
6255                         or die_error(500, "Open git-blame --incremental failed");
6256         } else {
6257                 # run git-blame --porcelain
6258                 open $fd, "-|", git_cmd(), "blame", '-p',
6259                         $hash_base, '--', $file_name
6260                         or die_error(500, "Open git-blame --porcelain failed");
6261         }
6262
6263         # incremental blame data returns early
6264         if ($format eq 'data') {
6265                 print $cgi->header(
6266                         -type=>"text/plain", -charset => "utf-8",
6267                         -status=> "200 OK");
6268                 local $| = 1; # output autoflush
6269                 while (my $line = <$fd>) {
6270                         print to_utf8($line);
6271                 }
6272                 close $fd
6273                         or print "ERROR $!\n";
6274
6275                 print 'END';
6276                 if (defined $t0 && gitweb_check_feature('timed')) {
6277                         print ' '.
6278                               tv_interval($t0, [ gettimeofday() ]).
6279                               ' '.$number_of_git_cmds;
6280                 }
6281                 print "\n";
6282
6283                 return;
6284         }
6285
6286         # page header
6287         git_header_html();
6288         my $formats_nav =
6289                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6290                         "blob") .
6291                 " | ";
6292         if ($format eq 'incremental') {
6293                 $formats_nav .=
6294                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6295                                 "blame") . " (non-incremental)";
6296         } else {
6297                 $formats_nav .=
6298                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6299                                 "blame") . " (incremental)";
6300         }
6301         $formats_nav .=
6302                 " | " .
6303                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6304                         "history") .
6305                 " | " .
6306                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6307                         "HEAD");
6308         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6309         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6310         git_print_page_path($file_name, $ftype, $hash_base);
6311
6312         # page body
6313         if ($format eq 'incremental') {
6314                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6315                       "This page requires JavaScript to run.\n Use ".
6316                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6317                               'this page').
6318                       " instead.\n".
6319                       "</b></center></div>\n</noscript>\n";
6320
6321                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6322         }
6323
6324         print qq!<div class="page_body">\n!;
6325         print qq!<div id="progress_info">... / ...</div>\n!
6326                 if ($format eq 'incremental');
6327         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6328               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6329               qq!<thead>\n!.
6330               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6331               qq!</thead>\n!.
6332               qq!<tbody>\n!;
6333
6334         my @rev_color = qw(light dark);
6335         my $num_colors = scalar(@rev_color);
6336         my $current_color = 0;
6337
6338         if ($format eq 'incremental') {
6339                 my $color_class = $rev_color[$current_color];
6340
6341                 #contents of a file
6342                 my $linenr = 0;
6343         LINE:
6344                 while (my $line = <$fd>) {
6345                         chomp $line;
6346                         $linenr++;
6347
6348                         print qq!<tr id="l$linenr" class="$color_class">!.
6349                               qq!<td class="sha1"><a href=""> </a></td>!.
6350                               qq!<td class="linenr">!.
6351                               qq!<a class="linenr" href="">$linenr</a></td>!;
6352                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6353                         print qq!</tr>\n!;
6354                 }
6355
6356         } else { # porcelain, i.e. ordinary blame
6357                 my %metainfo = (); # saves information about commits
6358
6359                 # blame data
6360         LINE:
6361                 while (my $line = <$fd>) {
6362                         chomp $line;
6363                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6364                         # no <lines in group> for subsequent lines in group of lines
6365                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6366                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6367                         if (!exists $metainfo{$full_rev}) {
6368                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6369                         }
6370                         my $meta = $metainfo{$full_rev};
6371                         my $data;
6372                         while ($data = <$fd>) {
6373                                 chomp $data;
6374                                 last if ($data =~ s/^\t//); # contents of line
6375                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6376                                         $meta->{$1} = $2 unless exists $meta->{$1};
6377                                 }
6378                                 if ($data =~ /^previous /) {
6379                                         $meta->{'nprevious'}++;
6380                                 }
6381                         }
6382                         my $short_rev = substr($full_rev, 0, 8);
6383                         my $author = $meta->{'author'};
6384                         my %date =
6385                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6386                         my $date = $date{'iso-tz'};
6387                         if ($group_size) {
6388                                 $current_color = ($current_color + 1) % $num_colors;
6389                         }
6390                         my $tr_class = $rev_color[$current_color];
6391                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6392                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6393                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6394                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6395                         if ($group_size) {
6396                                 print "<td class=\"sha1\"";
6397                                 print " title=\"". esc_html($author) . ", $date\"";
6398                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6399                                 print ">";
6400                                 print $cgi->a({-href => href(action=>"commit",
6401                                                              hash=>$full_rev,
6402                                                              file_name=>$file_name)},
6403                                               esc_html($short_rev));
6404                                 if ($group_size >= 2) {
6405                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6406                                         if (@author_initials) {
6407                                                 print "<br />" .
6408                                                       esc_html(join('', @author_initials));
6409                                                 #           or join('.', ...)
6410                                         }
6411                                 }
6412                                 print "</td>\n";
6413                         }
6414                         # 'previous' <sha1 of parent commit> <filename at commit>
6415                         if (exists $meta->{'previous'} &&
6416                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6417                                 $meta->{'parent'} = $1;
6418                                 $meta->{'file_parent'} = unquote($2);
6419                         }
6420                         my $linenr_commit =
6421                                 exists($meta->{'parent'}) ?
6422                                 $meta->{'parent'} : $full_rev;
6423                         my $linenr_filename =
6424                                 exists($meta->{'file_parent'}) ?
6425                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6426                         my $blamed = href(action => 'blame',
6427                                           file_name => $linenr_filename,
6428                                           hash_base => $linenr_commit);
6429                         print "<td class=\"linenr\">";
6430                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6431                                         -class => "linenr" },
6432                                       esc_html($lineno));
6433                         print "</td>";
6434                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6435                         print "</tr>\n";
6436                 } # end while
6437
6438         }
6439
6440         # footer
6441         print "</tbody>\n".
6442               "</table>\n"; # class="blame"
6443         print "</div>\n";   # class="blame_body"
6444         close $fd
6445                 or print "Reading blob failed\n";
6446
6447         git_footer_html();
6448 }
6449
6450 sub git_blame {
6451         git_blame_common();
6452 }
6453
6454 sub git_blame_incremental {
6455         git_blame_common('incremental');
6456 }
6457
6458 sub git_blame_data {
6459         git_blame_common('data');
6460 }
6461
6462 sub git_tags {
6463         my $head = git_get_head_hash($project);
6464         git_header_html();
6465         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6466         git_print_header_div('summary', $project);
6467
6468         my @tagslist = git_get_tags_list();
6469         if (@tagslist) {
6470                 git_tags_body(\@tagslist);
6471         }
6472         git_footer_html();
6473 }
6474
6475 sub git_heads {
6476         my $head = git_get_head_hash($project);
6477         git_header_html();
6478         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6479         git_print_header_div('summary', $project);
6480
6481         my @headslist = git_get_heads_list();
6482         if (@headslist) {
6483                 git_heads_body(\@headslist, $head);
6484         }
6485         git_footer_html();
6486 }
6487
6488 # used both for single remote view and for list of all the remotes
6489 sub git_remotes {
6490         gitweb_check_feature('remote_heads')
6491                 or die_error(403, "Remote heads view is disabled");
6492
6493         my $head = git_get_head_hash($project);
6494         my $remote = $input_params{'hash'};
6495
6496         my $remotedata = git_get_remotes_list($remote);
6497         die_error(500, "Unable to get remote information") unless defined $remotedata;
6498
6499         unless (%$remotedata) {
6500                 die_error(404, defined $remote ?
6501                         "Remote $remote not found" :
6502                         "No remotes found");
6503         }
6504
6505         git_header_html(undef, undef, -action_extra => $remote);
6506         git_print_page_nav('', '',  $head, undef, $head,
6507                 format_ref_views($remote ? '' : 'remotes'));
6508
6509         fill_remote_heads($remotedata);
6510         if (defined $remote) {
6511                 git_print_header_div('remotes', "$remote remote for $project");
6512                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6513         } else {
6514                 git_print_header_div('summary', "$project remotes");
6515                 git_remotes_body($remotedata, undef, $head);
6516         }
6517
6518         git_footer_html();
6519 }
6520
6521 sub git_blob_plain {
6522         my $type = shift;
6523         my $expires;
6524
6525         if (!defined $hash) {
6526                 if (defined $file_name) {
6527                         my $base = $hash_base || git_get_head_hash($project);
6528                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6529                                 or die_error(404, "Cannot find file");
6530                 } else {
6531                         die_error(400, "No file name defined");
6532                 }
6533         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6534                 # blobs defined by non-textual hash id's can be cached
6535                 $expires = "+1d";
6536         }
6537
6538         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6539                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6540
6541         # content-type (can include charset)
6542         $type = blob_contenttype($fd, $file_name, $type);
6543
6544         # "save as" filename, even when no $file_name is given
6545         my $save_as = "$hash";
6546         if (defined $file_name) {
6547                 $save_as = $file_name;
6548         } elsif ($type =~ m/^text\//) {
6549                 $save_as .= '.txt';
6550         }
6551
6552         # With XSS prevention on, blobs of all types except a few known safe
6553         # ones are served with "Content-Disposition: attachment" to make sure
6554         # they don't run in our security domain.  For certain image types,
6555         # blob view writes an <img> tag referring to blob_plain view, and we
6556         # want to be sure not to break that by serving the image as an
6557         # attachment (though Firefox 3 doesn't seem to care).
6558         my $sandbox = $prevent_xss &&
6559                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6560
6561         # serve text/* as text/plain
6562         if ($prevent_xss &&
6563             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6564              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6565                 my $rest = $1;
6566                 $rest = defined $rest ? $rest : '';
6567                 $type = "text/plain$rest";
6568         }
6569
6570         print $cgi->header(
6571                 -type => $type,
6572                 -expires => $expires,
6573                 -content_disposition =>
6574                         ($sandbox ? 'attachment' : 'inline')
6575                         . '; filename="' . $save_as . '"');
6576         local $/ = undef;
6577         binmode STDOUT, ':raw';
6578         print <$fd>;
6579         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6580         close $fd;
6581 }
6582
6583 sub git_blob {
6584         my $expires;
6585
6586         if (!defined $hash) {
6587                 if (defined $file_name) {
6588                         my $base = $hash_base || git_get_head_hash($project);
6589                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6590                                 or die_error(404, "Cannot find file");
6591                 } else {
6592                         die_error(400, "No file name defined");
6593                 }
6594         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6595                 # blobs defined by non-textual hash id's can be cached
6596                 $expires = "+1d";
6597         }
6598
6599         my $have_blame = gitweb_check_feature('blame');
6600         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6601                 or die_error(500, "Couldn't cat $file_name, $hash");
6602         my $mimetype = blob_mimetype($fd, $file_name);
6603         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6604         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6605                 close $fd;
6606                 return git_blob_plain($mimetype);
6607         }
6608         # we can have blame only for text/* mimetype
6609         $have_blame &&= ($mimetype =~ m!^text/!);
6610
6611         my $highlight = gitweb_check_feature('highlight');
6612         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6613         $fd = run_highlighter($fd, $highlight, $syntax)
6614                 if $syntax;
6615
6616         git_header_html(undef, $expires);
6617         my $formats_nav = '';
6618         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6619                 if (defined $file_name) {
6620                         if ($have_blame) {
6621                                 $formats_nav .=
6622                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6623                                                 "blame") .
6624                                         " | ";
6625                         }
6626                         $formats_nav .=
6627                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6628                                         "history") .
6629                                 " | " .
6630                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6631                                         "raw") .
6632                                 " | " .
6633                                 $cgi->a({-href => href(action=>"blob",
6634                                                        hash_base=>"HEAD", file_name=>$file_name)},
6635                                         "HEAD");
6636                 } else {
6637                         $formats_nav .=
6638                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6639                                         "raw");
6640                 }
6641                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6642                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6643         } else {
6644                 print "<div class=\"page_nav\">\n" .
6645                       "<br/><br/></div>\n" .
6646                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6647         }
6648         git_print_page_path($file_name, "blob", $hash_base);
6649         print "<div class=\"page_body\">\n";
6650         if ($mimetype =~ m!^image/!) {
6651                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6652                 if ($file_name) {
6653                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6654                 }
6655                 print qq! src="! .
6656                       href(action=>"blob_plain", hash=>$hash,
6657                            hash_base=>$hash_base, file_name=>$file_name) .
6658                       qq!" />\n!;
6659         } else {
6660                 my $nr;
6661                 while (my $line = <$fd>) {
6662                         chomp $line;
6663                         $nr++;
6664                         $line = untabify($line);
6665                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6666                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6667                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6668                 }
6669         }
6670         close $fd
6671                 or print "Reading blob failed.\n";
6672         print "</div>";
6673         git_footer_html();
6674 }
6675
6676 sub git_tree {
6677         if (!defined $hash_base) {
6678                 $hash_base = "HEAD";
6679         }
6680         if (!defined $hash) {
6681                 if (defined $file_name) {
6682                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6683                 } else {
6684                         $hash = $hash_base;
6685                 }
6686         }
6687         die_error(404, "No such tree") unless defined($hash);
6688
6689         my $show_sizes = gitweb_check_feature('show-sizes');
6690         my $have_blame = gitweb_check_feature('blame');
6691
6692         my @entries = ();
6693         {
6694                 local $/ = "\0";
6695                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6696                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6697                         or die_error(500, "Open git-ls-tree failed");
6698                 @entries = map { chomp; $_ } <$fd>;
6699                 close $fd
6700                         or die_error(404, "Reading tree failed");
6701         }
6702
6703         my $refs = git_get_references();
6704         my $ref = format_ref_marker($refs, $hash_base);
6705         git_header_html();
6706         my $basedir = '';
6707         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6708                 my @views_nav = ();
6709                 if (defined $file_name) {
6710                         push @views_nav,
6711                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6712                                         "history"),
6713                                 $cgi->a({-href => href(action=>"tree",
6714                                                        hash_base=>"HEAD", file_name=>$file_name)},
6715                                         "HEAD"),
6716                 }
6717                 my $snapshot_links = format_snapshot_links($hash);
6718                 if (defined $snapshot_links) {
6719                         # FIXME: Should be available when we have no hash base as well.
6720                         push @views_nav, $snapshot_links;
6721                 }
6722                 git_print_page_nav('tree','', $hash_base, undef, undef,
6723                                    join(' | ', @views_nav));
6724                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6725         } else {
6726                 undef $hash_base;
6727                 print "<div class=\"page_nav\">\n";
6728                 print "<br/><br/></div>\n";
6729                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6730         }
6731         if (defined $file_name) {
6732                 $basedir = $file_name;
6733                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6734                         $basedir .= '/';
6735                 }
6736                 git_print_page_path($file_name, 'tree', $hash_base);
6737         }
6738         print "<div class=\"page_body\">\n";
6739         print "<table class=\"tree\">\n";
6740         my $alternate = 1;
6741         # '..' (top directory) link if possible
6742         if (defined $hash_base &&
6743             defined $file_name && $file_name =~ m![^/]+$!) {
6744                 if ($alternate) {
6745                         print "<tr class=\"dark\">\n";
6746                 } else {
6747                         print "<tr class=\"light\">\n";
6748                 }
6749                 $alternate ^= 1;
6750
6751                 my $up = $file_name;
6752                 $up =~ s!/?[^/]+$!!;
6753                 undef $up unless $up;
6754                 # based on git_print_tree_entry
6755                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6756                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6757                 print '<td class="list">';
6758                 print $cgi->a({-href => href(action=>"tree",
6759                                              hash_base=>$hash_base,
6760                                              file_name=>$up)},
6761                               "..");
6762                 print "</td>\n";
6763                 print "<td class=\"link\"></td>\n";
6764
6765                 print "</tr>\n";
6766         }
6767         foreach my $line (@entries) {
6768                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6769
6770                 if ($alternate) {
6771                         print "<tr class=\"dark\">\n";
6772                 } else {
6773                         print "<tr class=\"light\">\n";
6774                 }
6775                 $alternate ^= 1;
6776
6777                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6778
6779                 print "</tr>\n";
6780         }
6781         print "</table>\n" .
6782               "</div>";
6783         git_footer_html();
6784 }
6785
6786 sub snapshot_name {
6787         my ($project, $hash) = @_;
6788
6789         # path/to/project.git  -> project
6790         # path/to/project/.git -> project
6791         my $name = to_utf8($project);
6792         $name =~ s,([^/])/*\.git$,$1,;
6793         $name = basename($name);
6794         # sanitize name
6795         $name =~ s/[[:cntrl:]]/?/g;
6796
6797         my $ver = $hash;
6798         if ($hash =~ /^[0-9a-fA-F]+$/) {
6799                 # shorten SHA-1 hash
6800                 my $full_hash = git_get_full_hash($project, $hash);
6801                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6802                         $ver = git_get_short_hash($project, $hash);
6803                 }
6804         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6805                 # tags don't need shortened SHA-1 hash
6806                 $ver = $1;
6807         } else {
6808                 # branches and other need shortened SHA-1 hash
6809                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6810                         $ver = $1;
6811                 }
6812                 $ver .= '-' . git_get_short_hash($project, $hash);
6813         }
6814         # in case of hierarchical branch names
6815         $ver =~ s!/!.!g;
6816
6817         # name = project-version_string
6818         $name = "$name-$ver";
6819
6820         return wantarray ? ($name, $name) : $name;
6821 }
6822
6823 sub git_snapshot {
6824         my $format = $input_params{'snapshot_format'};
6825         if (!@snapshot_fmts) {
6826                 die_error(403, "Snapshots not allowed");
6827         }
6828         # default to first supported snapshot format
6829         $format ||= $snapshot_fmts[0];
6830         if ($format !~ m/^[a-z0-9]+$/) {
6831                 die_error(400, "Invalid snapshot format parameter");
6832         } elsif (!exists($known_snapshot_formats{$format})) {
6833                 die_error(400, "Unknown snapshot format");
6834         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6835                 die_error(403, "Snapshot format not allowed");
6836         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6837                 die_error(403, "Unsupported snapshot format");
6838         }
6839
6840         my $type = git_get_type("$hash^{}");
6841         if (!$type) {
6842                 die_error(404, 'Object does not exist');
6843         }  elsif ($type eq 'blob') {
6844                 die_error(400, 'Object is not a tree-ish');
6845         }
6846
6847         my ($name, $prefix) = snapshot_name($project, $hash);
6848         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6849         my $cmd = quote_command(
6850                 git_cmd(), 'archive',
6851                 "--format=$known_snapshot_formats{$format}{'format'}",
6852                 "--prefix=$prefix/", $hash);
6853         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6854                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6855         }
6856
6857         $filename =~ s/(["\\])/\\$1/g;
6858         print $cgi->header(
6859                 -type => $known_snapshot_formats{$format}{'type'},
6860                 -content_disposition => 'inline; filename="' . $filename . '"',
6861                 -status => '200 OK');
6862
6863         open my $fd, "-|", $cmd
6864                 or die_error(500, "Execute git-archive failed");
6865         binmode STDOUT, ':raw';
6866         print <$fd>;
6867         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6868         close $fd;
6869 }
6870
6871 sub git_log_generic {
6872         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6873
6874         my $head = git_get_head_hash($project);
6875         if (!defined $base) {
6876                 $base = $head;
6877         }
6878         if (!defined $page) {
6879                 $page = 0;
6880         }
6881         my $refs = git_get_references();
6882
6883         my $commit_hash = $base;
6884         if (defined $parent) {
6885                 $commit_hash = "$parent..$base";
6886         }
6887         my @commitlist =
6888                 parse_commits($commit_hash, 101, (100 * $page),
6889                               defined $file_name ? ($file_name, "--full-history") : ());
6890
6891         my $ftype;
6892         if (!defined $file_hash && defined $file_name) {
6893                 # some commits could have deleted file in question,
6894                 # and not have it in tree, but one of them has to have it
6895                 for (my $i = 0; $i < @commitlist; $i++) {
6896                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6897                         last if defined $file_hash;
6898                 }
6899         }
6900         if (defined $file_hash) {
6901                 $ftype = git_get_type($file_hash);
6902         }
6903         if (defined $file_name && !defined $ftype) {
6904                 die_error(500, "Unknown type of object");
6905         }
6906         my %co;
6907         if (defined $file_name) {
6908                 %co = parse_commit($base)
6909                         or die_error(404, "Unknown commit object");
6910         }
6911
6912
6913         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6914         my $next_link = '';
6915         if ($#commitlist >= 100) {
6916                 $next_link =
6917                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6918                                  -accesskey => "n", -title => "Alt-n"}, "next");
6919         }
6920         my $patch_max = gitweb_get_feature('patches');
6921         if ($patch_max && !defined $file_name) {
6922                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6923                         $paging_nav .= " &sdot; " .
6924                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6925                                         "patches");
6926                 }
6927         }
6928
6929         git_header_html();
6930         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6931         if (defined $file_name) {
6932                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6933         } else {
6934                 git_print_header_div('summary', $project)
6935         }
6936         git_print_page_path($file_name, $ftype, $hash_base)
6937                 if (defined $file_name);
6938
6939         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6940                      $file_name, $file_hash, $ftype);
6941
6942         git_footer_html();
6943 }
6944
6945 sub git_log {
6946         git_log_generic('log', \&git_log_body,
6947                         $hash, $hash_parent);
6948 }
6949
6950 sub git_commit {
6951         $hash ||= $hash_base || "HEAD";
6952         my %co = parse_commit($hash)
6953             or die_error(404, "Unknown commit object");
6954
6955         my $parent  = $co{'parent'};
6956         my $parents = $co{'parents'}; # listref
6957
6958         # we need to prepare $formats_nav before any parameter munging
6959         my $formats_nav;
6960         if (!defined $parent) {
6961                 # --root commitdiff
6962                 $formats_nav .= '(initial)';
6963         } elsif (@$parents == 1) {
6964                 # single parent commit
6965                 $formats_nav .=
6966                         '(parent: ' .
6967                         $cgi->a({-href => href(action=>"commit",
6968                                                hash=>$parent)},
6969                                 esc_html(substr($parent, 0, 7))) .
6970                         ')';
6971         } else {
6972                 # merge commit
6973                 $formats_nav .=
6974                         '(merge: ' .
6975                         join(' ', map {
6976                                 $cgi->a({-href => href(action=>"commit",
6977                                                        hash=>$_)},
6978                                         esc_html(substr($_, 0, 7)));
6979                         } @$parents ) .
6980                         ')';
6981         }
6982         if (gitweb_check_feature('patches') && @$parents <= 1) {
6983                 $formats_nav .= " | " .
6984                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6985                                 "patch");
6986         }
6987
6988         if (!defined $parent) {
6989                 $parent = "--root";
6990         }
6991         my @difftree;
6992         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6993                 @diff_opts,
6994                 (@$parents <= 1 ? $parent : '-c'),
6995                 $hash, "--"
6996                 or die_error(500, "Open git-diff-tree failed");
6997         @difftree = map { chomp; $_ } <$fd>;
6998         close $fd or die_error(404, "Reading git-diff-tree failed");
6999
7000         # non-textual hash id's can be cached
7001         my $expires;
7002         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7003                 $expires = "+1d";
7004         }
7005         my $refs = git_get_references();
7006         my $ref = format_ref_marker($refs, $co{'id'});
7007
7008         git_header_html(undef, $expires);
7009         git_print_page_nav('commit', '',
7010                            $hash, $co{'tree'}, $hash,
7011                            $formats_nav);
7012
7013         if (defined $co{'parent'}) {
7014                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7015         } else {
7016                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7017         }
7018         print "<div class=\"title_text\">\n" .
7019               "<table class=\"object_header\">\n";
7020         git_print_authorship_rows(\%co);
7021         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7022         print "<tr>" .
7023               "<td>tree</td>" .
7024               "<td class=\"sha1\">" .
7025               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7026                        class => "list"}, $co{'tree'}) .
7027               "</td>" .
7028               "<td class=\"link\">" .
7029               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7030                       "tree");
7031         my $snapshot_links = format_snapshot_links($hash);
7032         if (defined $snapshot_links) {
7033                 print " | " . $snapshot_links;
7034         }
7035         print "</td>" .
7036               "</tr>\n";
7037
7038         foreach my $par (@$parents) {
7039                 print "<tr>" .
7040                       "<td>parent</td>" .
7041                       "<td class=\"sha1\">" .
7042                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7043                                class => "list"}, $par) .
7044                       "</td>" .
7045                       "<td class=\"link\">" .
7046                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7047                       " | " .
7048                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7049                       "</td>" .
7050                       "</tr>\n";
7051         }
7052         print "</table>".
7053               "</div>\n";
7054
7055         print "<div class=\"page_body\">\n";
7056         git_print_log($co{'comment'});
7057         print "</div>\n";
7058
7059         git_difftree_body(\@difftree, $hash, @$parents);
7060
7061         git_footer_html();
7062 }
7063
7064 sub git_object {
7065         # object is defined by:
7066         # - hash or hash_base alone
7067         # - hash_base and file_name
7068         my $type;
7069
7070         # - hash or hash_base alone
7071         if ($hash || ($hash_base && !defined $file_name)) {
7072                 my $object_id = $hash || $hash_base;
7073
7074                 open my $fd, "-|", quote_command(
7075                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7076                         or die_error(404, "Object does not exist");
7077                 $type = <$fd>;
7078                 chomp $type;
7079                 close $fd
7080                         or die_error(404, "Object does not exist");
7081
7082         # - hash_base and file_name
7083         } elsif ($hash_base && defined $file_name) {
7084                 $file_name =~ s,/+$,,;
7085
7086                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7087                         or die_error(404, "Base object does not exist");
7088
7089                 # here errors should not hapen
7090                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7091                         or die_error(500, "Open git-ls-tree failed");
7092                 my $line = <$fd>;
7093                 close $fd;
7094
7095                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7096                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7097                         die_error(404, "File or directory for given base does not exist");
7098                 }
7099                 $type = $2;
7100                 $hash = $3;
7101         } else {
7102                 die_error(400, "Not enough information to find object");
7103         }
7104
7105         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7106                                           hash=>$hash, hash_base=>$hash_base,
7107                                           file_name=>$file_name),
7108                              -status => '302 Found');
7109 }
7110
7111 sub git_blobdiff {
7112         my $format = shift || 'html';
7113         my $diff_style = $input_params{'diff_style'} || 'inline';
7114
7115         my $fd;
7116         my @difftree;
7117         my %diffinfo;
7118         my $expires;
7119
7120         # preparing $fd and %diffinfo for git_patchset_body
7121         # new style URI
7122         if (defined $hash_base && defined $hash_parent_base) {
7123                 if (defined $file_name) {
7124                         # read raw output
7125                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7126                                 $hash_parent_base, $hash_base,
7127                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7128                                 or die_error(500, "Open git-diff-tree failed");
7129                         @difftree = map { chomp; $_ } <$fd>;
7130                         close $fd
7131                                 or die_error(404, "Reading git-diff-tree failed");
7132                         @difftree
7133                                 or die_error(404, "Blob diff not found");
7134
7135                 } elsif (defined $hash &&
7136                          $hash =~ /[0-9a-fA-F]{40}/) {
7137                         # try to find filename from $hash
7138
7139                         # read filtered raw output
7140                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7141                                 $hash_parent_base, $hash_base, "--"
7142                                 or die_error(500, "Open git-diff-tree failed");
7143                         @difftree =
7144                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7145                                 # $hash == to_id
7146                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7147                                 map { chomp; $_ } <$fd>;
7148                         close $fd
7149                                 or die_error(404, "Reading git-diff-tree failed");
7150                         @difftree
7151                                 or die_error(404, "Blob diff not found");
7152
7153                 } else {
7154                         die_error(400, "Missing one of the blob diff parameters");
7155                 }
7156
7157                 if (@difftree > 1) {
7158                         die_error(400, "Ambiguous blob diff specification");
7159                 }
7160
7161                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7162                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7163                 $file_name   ||= $diffinfo{'to_file'};
7164
7165                 $hash_parent ||= $diffinfo{'from_id'};
7166                 $hash        ||= $diffinfo{'to_id'};
7167
7168                 # non-textual hash id's can be cached
7169                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7170                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7171                         $expires = '+1d';
7172                 }
7173
7174                 # open patch output
7175                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7176                         '-p', ($format eq 'html' ? "--full-index" : ()),
7177                         $hash_parent_base, $hash_base,
7178                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7179                         or die_error(500, "Open git-diff-tree failed");
7180         }
7181
7182         # old/legacy style URI -- not generated anymore since 1.4.3.
7183         if (!%diffinfo) {
7184                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7185         }
7186
7187         # header
7188         if ($format eq 'html') {
7189                 my $formats_nav =
7190                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7191                                 "raw");
7192                 $formats_nav .= diff_style_nav($diff_style);
7193                 git_header_html(undef, $expires);
7194                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7195                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7196                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7197                 } else {
7198                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7199                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7200                 }
7201                 if (defined $file_name) {
7202                         git_print_page_path($file_name, "blob", $hash_base);
7203                 } else {
7204                         print "<div class=\"page_path\"></div>\n";
7205                 }
7206
7207         } elsif ($format eq 'plain') {
7208                 print $cgi->header(
7209                         -type => 'text/plain',
7210                         -charset => 'utf-8',
7211                         -expires => $expires,
7212                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7213
7214                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7215
7216         } else {
7217                 die_error(400, "Unknown blobdiff format");
7218         }
7219
7220         # patch
7221         if ($format eq 'html') {
7222                 print "<div class=\"page_body\">\n";
7223
7224                 git_patchset_body($fd, $diff_style,
7225                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7226                 close $fd;
7227
7228                 print "</div>\n"; # class="page_body"
7229                 git_footer_html();
7230
7231         } else {
7232                 while (my $line = <$fd>) {
7233                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7234                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7235
7236                         print $line;
7237
7238                         last if $line =~ m!^\+\+\+!;
7239                 }
7240                 local $/ = undef;
7241                 print <$fd>;
7242                 close $fd;
7243         }
7244 }
7245
7246 sub git_blobdiff_plain {
7247         git_blobdiff('plain');
7248 }
7249
7250 # assumes that it is added as later part of already existing navigation,
7251 # so it returns "| foo | bar" rather than just "foo | bar"
7252 sub diff_style_nav {
7253         my ($diff_style, $is_combined) = @_;
7254         $diff_style ||= 'inline';
7255
7256         return "" if ($is_combined);
7257
7258         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7259         my %styles = @styles;
7260         @styles =
7261                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7262
7263         return join '',
7264                 map { " | ".$_ }
7265                 map {
7266                         $_ eq $diff_style ? $styles{$_} :
7267                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7268                 } @styles;
7269 }
7270
7271 sub git_commitdiff {
7272         my %params = @_;
7273         my $format = $params{-format} || 'html';
7274         my $diff_style = $input_params{'diff_style'} || 'inline';
7275
7276         my ($patch_max) = gitweb_get_feature('patches');
7277         if ($format eq 'patch') {
7278                 die_error(403, "Patch view not allowed") unless $patch_max;
7279         }
7280
7281         $hash ||= $hash_base || "HEAD";
7282         my %co = parse_commit($hash)
7283             or die_error(404, "Unknown commit object");
7284
7285         # choose format for commitdiff for merge
7286         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7287                 $hash_parent = '--cc';
7288         }
7289         # we need to prepare $formats_nav before almost any parameter munging
7290         my $formats_nav;
7291         if ($format eq 'html') {
7292                 $formats_nav =
7293                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7294                                 "raw");
7295                 if ($patch_max && @{$co{'parents'}} <= 1) {
7296                         $formats_nav .= " | " .
7297                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7298                                         "patch");
7299                 }
7300                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7301
7302                 if (defined $hash_parent &&
7303                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7304                         # commitdiff with two commits given
7305                         my $hash_parent_short = $hash_parent;
7306                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7307                                 $hash_parent_short = substr($hash_parent, 0, 7);
7308                         }
7309                         $formats_nav .=
7310                                 ' (from';
7311                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7312                                 if ($co{'parents'}[$i] eq $hash_parent) {
7313                                         $formats_nav .= ' parent ' . ($i+1);
7314                                         last;
7315                                 }
7316                         }
7317                         $formats_nav .= ': ' .
7318                                 $cgi->a({-href => href(-replay=>1,
7319                                                        hash=>$hash_parent, hash_base=>undef)},
7320                                         esc_html($hash_parent_short)) .
7321                                 ')';
7322                 } elsif (!$co{'parent'}) {
7323                         # --root commitdiff
7324                         $formats_nav .= ' (initial)';
7325                 } elsif (scalar @{$co{'parents'}} == 1) {
7326                         # single parent commit
7327                         $formats_nav .=
7328                                 ' (parent: ' .
7329                                 $cgi->a({-href => href(-replay=>1,
7330                                                        hash=>$co{'parent'}, hash_base=>undef)},
7331                                         esc_html(substr($co{'parent'}, 0, 7))) .
7332                                 ')';
7333                 } else {
7334                         # merge commit
7335                         if ($hash_parent eq '--cc') {
7336                                 $formats_nav .= ' | ' .
7337                                         $cgi->a({-href => href(-replay=>1,
7338                                                                hash=>$hash, hash_parent=>'-c')},
7339                                                 'combined');
7340                         } else { # $hash_parent eq '-c'
7341                                 $formats_nav .= ' | ' .
7342                                         $cgi->a({-href => href(-replay=>1,
7343                                                                hash=>$hash, hash_parent=>'--cc')},
7344                                                 'compact');
7345                         }
7346                         $formats_nav .=
7347                                 ' (merge: ' .
7348                                 join(' ', map {
7349                                         $cgi->a({-href => href(-replay=>1,
7350                                                                hash=>$_, hash_base=>undef)},
7351                                                 esc_html(substr($_, 0, 7)));
7352                                 } @{$co{'parents'}} ) .
7353                                 ')';
7354                 }
7355         }
7356
7357         my $hash_parent_param = $hash_parent;
7358         if (!defined $hash_parent_param) {
7359                 # --cc for multiple parents, --root for parentless
7360                 $hash_parent_param =
7361                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7362         }
7363
7364         # read commitdiff
7365         my $fd;
7366         my @difftree;
7367         if ($format eq 'html') {
7368                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7369                         "--no-commit-id", "--patch-with-raw", "--full-index",
7370                         $hash_parent_param, $hash, "--"
7371                         or die_error(500, "Open git-diff-tree failed");
7372
7373                 while (my $line = <$fd>) {
7374                         chomp $line;
7375                         # empty line ends raw part of diff-tree output
7376                         last unless $line;
7377                         push @difftree, scalar parse_difftree_raw_line($line);
7378                 }
7379
7380         } elsif ($format eq 'plain') {
7381                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7382                         '-p', $hash_parent_param, $hash, "--"
7383                         or die_error(500, "Open git-diff-tree failed");
7384         } elsif ($format eq 'patch') {
7385                 # For commit ranges, we limit the output to the number of
7386                 # patches specified in the 'patches' feature.
7387                 # For single commits, we limit the output to a single patch,
7388                 # diverging from the git-format-patch default.
7389                 my @commit_spec = ();
7390                 if ($hash_parent) {
7391                         if ($patch_max > 0) {
7392                                 push @commit_spec, "-$patch_max";
7393                         }
7394                         push @commit_spec, '-n', "$hash_parent..$hash";
7395                 } else {
7396                         if ($params{-single}) {
7397                                 push @commit_spec, '-1';
7398                         } else {
7399                                 if ($patch_max > 0) {
7400                                         push @commit_spec, "-$patch_max";
7401                                 }
7402                                 push @commit_spec, "-n";
7403                         }
7404                         push @commit_spec, '--root', $hash;
7405                 }
7406                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7407                         '--encoding=utf8', '--stdout', @commit_spec
7408                         or die_error(500, "Open git-format-patch failed");
7409         } else {
7410                 die_error(400, "Unknown commitdiff format");
7411         }
7412
7413         # non-textual hash id's can be cached
7414         my $expires;
7415         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7416                 $expires = "+1d";
7417         }
7418
7419         # write commit message
7420         if ($format eq 'html') {
7421                 my $refs = git_get_references();
7422                 my $ref = format_ref_marker($refs, $co{'id'});
7423
7424                 git_header_html(undef, $expires);
7425                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7426                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7427                 print "<div class=\"title_text\">\n" .
7428                       "<table class=\"object_header\">\n";
7429                 git_print_authorship_rows(\%co);
7430                 print "</table>".
7431                       "</div>\n";
7432                 print "<div class=\"page_body\">\n";
7433                 if (@{$co{'comment'}} > 1) {
7434                         print "<div class=\"log\">\n";
7435                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7436                         print "</div>\n"; # class="log"
7437                 }
7438
7439         } elsif ($format eq 'plain') {
7440                 my $refs = git_get_references("tags");
7441                 my $tagname = git_get_rev_name_tags($hash);
7442                 my $filename = basename($project) . "-$hash.patch";
7443
7444                 print $cgi->header(
7445                         -type => 'text/plain',
7446                         -charset => 'utf-8',
7447                         -expires => $expires,
7448                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7449                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7450                 print "From: " . to_utf8($co{'author'}) . "\n";
7451                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7452                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7453
7454                 print "X-Git-Tag: $tagname\n" if $tagname;
7455                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7456
7457                 foreach my $line (@{$co{'comment'}}) {
7458                         print to_utf8($line) . "\n";
7459                 }
7460                 print "---\n\n";
7461         } elsif ($format eq 'patch') {
7462                 my $filename = basename($project) . "-$hash.patch";
7463
7464                 print $cgi->header(
7465                         -type => 'text/plain',
7466                         -charset => 'utf-8',
7467                         -expires => $expires,
7468                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7469         }
7470
7471         # write patch
7472         if ($format eq 'html') {
7473                 my $use_parents = !defined $hash_parent ||
7474                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7475                 git_difftree_body(\@difftree, $hash,
7476                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7477                 print "<br/>\n";
7478
7479                 git_patchset_body($fd, $diff_style,
7480                                   \@difftree, $hash,
7481                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7482                 close $fd;
7483                 print "</div>\n"; # class="page_body"
7484                 git_footer_html();
7485
7486         } elsif ($format eq 'plain') {
7487                 local $/ = undef;
7488                 print <$fd>;
7489                 close $fd
7490                         or print "Reading git-diff-tree failed\n";
7491         } elsif ($format eq 'patch') {
7492                 local $/ = undef;
7493                 print <$fd>;
7494                 close $fd
7495                         or print "Reading git-format-patch failed\n";
7496         }
7497 }
7498
7499 sub git_commitdiff_plain {
7500         git_commitdiff(-format => 'plain');
7501 }
7502
7503 # format-patch-style patches
7504 sub git_patch {
7505         git_commitdiff(-format => 'patch', -single => 1);
7506 }
7507
7508 sub git_patches {
7509         git_commitdiff(-format => 'patch');
7510 }
7511
7512 sub git_history {
7513         git_log_generic('history', \&git_history_body,
7514                         $hash_base, $hash_parent_base,
7515                         $file_name, $hash);
7516 }
7517
7518 sub git_search {
7519         $searchtype ||= 'commit';
7520
7521         # check if appropriate features are enabled
7522         gitweb_check_feature('search')
7523                 or die_error(403, "Search is disabled");
7524         if ($searchtype eq 'pickaxe') {
7525                 # pickaxe may take all resources of your box and run for several minutes
7526                 # with every query - so decide by yourself how public you make this feature
7527                 gitweb_check_feature('pickaxe')
7528                         or die_error(403, "Pickaxe search is disabled");
7529         }
7530         if ($searchtype eq 'grep') {
7531                 # grep search might be potentially CPU-intensive, too
7532                 gitweb_check_feature('grep')
7533                         or die_error(403, "Grep search is disabled");
7534         }
7535
7536         if (!defined $searchtext) {
7537                 die_error(400, "Text field is empty");
7538         }
7539         if (!defined $hash) {
7540                 $hash = git_get_head_hash($project);
7541         }
7542         my %co = parse_commit($hash);
7543         if (!%co) {
7544                 die_error(404, "Unknown commit object");
7545         }
7546         if (!defined $page) {
7547                 $page = 0;
7548         }
7549
7550         if ($searchtype eq 'commit' ||
7551             $searchtype eq 'author' ||
7552             $searchtype eq 'committer') {
7553                 git_search_message(%co);
7554         } elsif ($searchtype eq 'pickaxe') {
7555                 git_search_changes(%co);
7556         } elsif ($searchtype eq 'grep') {
7557                 git_search_files(%co);
7558         } else {
7559                 die_error(400, "Unknown search type");
7560         }
7561 }
7562
7563 sub git_search_help {
7564         git_header_html();
7565         git_print_page_nav('','', $hash,$hash,$hash);
7566         print <<EOT;
7567 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7568 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7569 the pattern entered is recognized as the POSIX extended
7570 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7571 insensitive).</p>
7572 <dl>
7573 <dt><b>commit</b></dt>
7574 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7575 EOT
7576         my $have_grep = gitweb_check_feature('grep');
7577         if ($have_grep) {
7578                 print <<EOT;
7579 <dt><b>grep</b></dt>
7580 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7581     a different one) are searched for the given pattern. On large trees, this search can take
7582 a while and put some strain on the server, so please use it with some consideration. Note that
7583 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7584 case-sensitive.</dd>
7585 EOT
7586         }
7587         print <<EOT;
7588 <dt><b>author</b></dt>
7589 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7590 <dt><b>committer</b></dt>
7591 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7592 EOT
7593         my $have_pickaxe = gitweb_check_feature('pickaxe');
7594         if ($have_pickaxe) {
7595                 print <<EOT;
7596 <dt><b>pickaxe</b></dt>
7597 <dd>All commits that caused the string to appear or disappear from any file (changes that
7598 added, removed or "modified" the string) will be listed. This search can take a while and
7599 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7600 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7601 EOT
7602         }
7603         print "</dl>\n";
7604         git_footer_html();
7605 }
7606
7607 sub git_shortlog {
7608         git_log_generic('shortlog', \&git_shortlog_body,
7609                         $hash, $hash_parent);
7610 }
7611
7612 ## ......................................................................
7613 ## feeds (RSS, Atom; OPML)
7614
7615 sub git_feed {
7616         my $format = shift || 'atom';
7617         my $have_blame = gitweb_check_feature('blame');
7618
7619         # Atom: http://www.atomenabled.org/developers/syndication/
7620         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7621         if ($format ne 'rss' && $format ne 'atom') {
7622                 die_error(400, "Unknown web feed format");
7623         }
7624
7625         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7626         my $head = $hash || 'HEAD';
7627         my @commitlist = parse_commits($head, 150, 0, $file_name);
7628
7629         my %latest_commit;
7630         my %latest_date;
7631         my $content_type = "application/$format+xml";
7632         if (defined $cgi->http('HTTP_ACCEPT') &&
7633                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7634                 # browser (feed reader) prefers text/xml
7635                 $content_type = 'text/xml';
7636         }
7637         if (defined($commitlist[0])) {
7638                 %latest_commit = %{$commitlist[0]};
7639                 my $latest_epoch = $latest_commit{'committer_epoch'};
7640                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7641                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7642                 if (defined $if_modified) {
7643                         my $since;
7644                         if (eval { require HTTP::Date; 1; }) {
7645                                 $since = HTTP::Date::str2time($if_modified);
7646                         } elsif (eval { require Time::ParseDate; 1; }) {
7647                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7648                         }
7649                         if (defined $since && $latest_epoch <= $since) {
7650                                 print $cgi->header(
7651                                         -type => $content_type,
7652                                         -charset => 'utf-8',
7653                                         -last_modified => $latest_date{'rfc2822'},
7654                                         -status => '304 Not Modified');
7655                                 return;
7656                         }
7657                 }
7658                 print $cgi->header(
7659                         -type => $content_type,
7660                         -charset => 'utf-8',
7661                         -last_modified => $latest_date{'rfc2822'});
7662         } else {
7663                 print $cgi->header(
7664                         -type => $content_type,
7665                         -charset => 'utf-8');
7666         }
7667
7668         # Optimization: skip generating the body if client asks only
7669         # for Last-Modified date.
7670         return if ($cgi->request_method() eq 'HEAD');
7671
7672         # header variables
7673         my $title = "$site_name - $project/$action";
7674         my $feed_type = 'log';
7675         if (defined $hash) {
7676                 $title .= " - '$hash'";
7677                 $feed_type = 'branch log';
7678                 if (defined $file_name) {
7679                         $title .= " :: $file_name";
7680                         $feed_type = 'history';
7681                 }
7682         } elsif (defined $file_name) {
7683                 $title .= " - $file_name";
7684                 $feed_type = 'history';
7685         }
7686         $title .= " $feed_type";
7687         my $descr = git_get_project_description($project);
7688         if (defined $descr) {
7689                 $descr = esc_html($descr);
7690         } else {
7691                 $descr = "$project " .
7692                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7693                          " feed";
7694         }
7695         my $owner = git_get_project_owner($project);
7696         $owner = esc_html($owner);
7697
7698         #header
7699         my $alt_url;
7700         if (defined $file_name) {
7701                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7702         } elsif (defined $hash) {
7703                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7704         } else {
7705                 $alt_url = href(-full=>1, action=>"summary");
7706         }
7707         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7708         if ($format eq 'rss') {
7709                 print <<XML;
7710 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7711 <channel>
7712 XML
7713                 print "<title>$title</title>\n" .
7714                       "<link>$alt_url</link>\n" .
7715                       "<description>$descr</description>\n" .
7716                       "<language>en</language>\n" .
7717                       # project owner is responsible for 'editorial' content
7718                       "<managingEditor>$owner</managingEditor>\n";
7719                 if (defined $logo || defined $favicon) {
7720                         # prefer the logo to the favicon, since RSS
7721                         # doesn't allow both
7722                         my $img = esc_url($logo || $favicon);
7723                         print "<image>\n" .
7724                               "<url>$img</url>\n" .
7725                               "<title>$title</title>\n" .
7726                               "<link>$alt_url</link>\n" .
7727                               "</image>\n";
7728                 }
7729                 if (%latest_date) {
7730                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7731                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7732                 }
7733                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7734         } elsif ($format eq 'atom') {
7735                 print <<XML;
7736 <feed xmlns="http://www.w3.org/2005/Atom">
7737 XML
7738                 print "<title>$title</title>\n" .
7739                       "<subtitle>$descr</subtitle>\n" .
7740                       '<link rel="alternate" type="text/html" href="' .
7741                       $alt_url . '" />' . "\n" .
7742                       '<link rel="self" type="' . $content_type . '" href="' .
7743                       $cgi->self_url() . '" />' . "\n" .
7744                       "<id>" . href(-full=>1) . "</id>\n" .
7745                       # use project owner for feed author
7746                       "<author><name>$owner</name></author>\n";
7747                 if (defined $favicon) {
7748                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7749                 }
7750                 if (defined $logo) {
7751                         # not twice as wide as tall: 72 x 27 pixels
7752                         print "<logo>" . esc_url($logo) . "</logo>\n";
7753                 }
7754                 if (! %latest_date) {
7755                         # dummy date to keep the feed valid until commits trickle in:
7756                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7757                 } else {
7758                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7759                 }
7760                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7761         }
7762
7763         # contents
7764         for (my $i = 0; $i <= $#commitlist; $i++) {
7765                 my %co = %{$commitlist[$i]};
7766                 my $commit = $co{'id'};
7767                 # we read 150, we always show 30 and the ones more recent than 48 hours
7768                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7769                         last;
7770                 }
7771                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7772
7773                 # get list of changed files
7774                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7775                         $co{'parent'} || "--root",
7776                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7777                         or next;
7778                 my @difftree = map { chomp; $_ } <$fd>;
7779                 close $fd
7780                         or next;
7781
7782                 # print element (entry, item)
7783                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7784                 if ($format eq 'rss') {
7785                         print "<item>\n" .
7786                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7787                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7788                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7789                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7790                               "<link>$co_url</link>\n" .
7791                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7792                               "<content:encoded>" .
7793                               "<![CDATA[\n";
7794                 } elsif ($format eq 'atom') {
7795                         print "<entry>\n" .
7796                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7797                               "<updated>$cd{'iso-8601'}</updated>\n" .
7798                               "<author>\n" .
7799                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7800                         if ($co{'author_email'}) {
7801                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7802                         }
7803                         print "</author>\n" .
7804                               # use committer for contributor
7805                               "<contributor>\n" .
7806                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7807                         if ($co{'committer_email'}) {
7808                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7809                         }
7810                         print "</contributor>\n" .
7811                               "<published>$cd{'iso-8601'}</published>\n" .
7812                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7813                               "<id>$co_url</id>\n" .
7814                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7815                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7816                 }
7817                 my $comment = $co{'comment'};
7818                 print "<pre>\n";
7819                 foreach my $line (@$comment) {
7820                         $line = esc_html($line);
7821                         print "$line\n";
7822                 }
7823                 print "</pre><ul>\n";
7824                 foreach my $difftree_line (@difftree) {
7825                         my %difftree = parse_difftree_raw_line($difftree_line);
7826                         next if !$difftree{'from_id'};
7827
7828                         my $file = $difftree{'file'} || $difftree{'to_file'};
7829
7830                         print "<li>" .
7831                               "[" .
7832                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7833                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7834                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7835                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7836                                       -title => "diff"}, 'D');
7837                         if ($have_blame) {
7838                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7839                                                              file_name=>$file, hash_base=>$commit),
7840                                               -title => "blame"}, 'B');
7841                         }
7842                         # if this is not a feed of a file history
7843                         if (!defined $file_name || $file_name ne $file) {
7844                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7845                                                              file_name=>$file, hash=>$commit),
7846                                               -title => "history"}, 'H');
7847                         }
7848                         $file = esc_path($file);
7849                         print "] ".
7850                               "$file</li>\n";
7851                 }
7852                 if ($format eq 'rss') {
7853                         print "</ul>]]>\n" .
7854                               "</content:encoded>\n" .
7855                               "</item>\n";
7856                 } elsif ($format eq 'atom') {
7857                         print "</ul>\n</div>\n" .
7858                               "</content>\n" .
7859                               "</entry>\n";
7860                 }
7861         }
7862
7863         # end of feed
7864         if ($format eq 'rss') {
7865                 print "</channel>\n</rss>\n";
7866         } elsif ($format eq 'atom') {
7867                 print "</feed>\n";
7868         }
7869 }
7870
7871 sub git_rss {
7872         git_feed('rss');
7873 }
7874
7875 sub git_atom {
7876         git_feed('atom');
7877 }
7878
7879 sub git_opml {
7880         my @list = git_get_projects_list($project_filter, $strict_export);
7881         if (!@list) {
7882                 die_error(404, "No projects found");
7883         }
7884
7885         print $cgi->header(
7886                 -type => 'text/xml',
7887                 -charset => 'utf-8',
7888                 -content_disposition => 'inline; filename="opml.xml"');
7889
7890         my $title = esc_html($site_name);
7891         my $filter = " within subdirectory ";
7892         if (defined $project_filter) {
7893                 $filter .= esc_html($project_filter);
7894         } else {
7895                 $filter = "";
7896         }
7897         print <<XML;
7898 <?xml version="1.0" encoding="utf-8"?>
7899 <opml version="1.0">
7900 <head>
7901   <title>$title OPML Export$filter</title>
7902 </head>
7903 <body>
7904 <outline text="git RSS feeds">
7905 XML
7906
7907         foreach my $pr (@list) {
7908                 my %proj = %$pr;
7909                 my $head = git_get_head_hash($proj{'path'});
7910                 if (!defined $head) {
7911                         next;
7912                 }
7913                 $git_dir = "$projectroot/$proj{'path'}";
7914                 my %co = parse_commit($head);
7915                 if (!%co) {
7916                         next;
7917                 }
7918
7919                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7920                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7921                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7922                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7923         }
7924         print <<XML;
7925 </outline>
7926 </body>
7927 </opml>
7928 XML
7929 }