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 $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         # this must be last entry (for manipulation from JavaScript)
 764         javascript => "js"
 765 );
 766 our %cgi_param_mapping = @cgi_param_mapping;
 767
 768 # we will also need to know the possible actions, for validation
 769 our %actions = (
 770         "blame" => \&git_blame,
 771         "blame_incremental" => \&git_blame_incremental,
 772         "blame_data" => \&git_blame_data,
 773         "blobdiff" => \&git_blobdiff,
 774         "blobdiff_plain" => \&git_blobdiff_plain,
 775         "blob" => \&git_blob,
 776         "blob_plain" => \&git_blob_plain,
 777         "commitdiff" => \&git_commitdiff,
 778         "commitdiff_plain" => \&git_commitdiff_plain,
 779         "commit" => \&git_commit,
 780         "forks" => \&git_forks,
 781         "heads" => \&git_heads,
 782         "history" => \&git_history,
 783         "log" => \&git_log,
 784         "patch" => \&git_patch,
 785         "patches" => \&git_patches,
 786         "remotes" => \&git_remotes,
 787         "rss" => \&git_rss,
 788         "atom" => \&git_atom,
 789         "search" => \&git_search,
 790         "search_help" => \&git_search_help,
 791         "shortlog" => \&git_shortlog,
 792         "summary" => \&git_summary,
 793         "tag" => \&git_tag,
 794         "tags" => \&git_tags,
 795         "tree" => \&git_tree,
 796         "snapshot" => \&git_snapshot,
 797         "object" => \&git_object,
 798         # those below don't need $project
 799         "opml" => \&git_opml,
 800         "project_list" => \&git_project_list,
 801         "project_index" => \&git_project_index,
 802 );
 803
 804 # finally, we have the hash of allowed extra_options for the commands that
 805 # allow them
 806 our %allowed_options = (
 807         "--no-merges" => [ qw(rss atom log shortlog history) ],
 808 );
 809
 810 # fill %input_params with the CGI parameters. All values except for 'opt'
 811 # should be single values, but opt can be an array. We should probably
 812 # build an array of parameters that can be multi-valued, but since for the time
 813 # being it's only this one, we just single it out
 814 sub evaluate_query_params {
 815         our $cgi;
 816
 817         while (my ($name, $symbol) = each %cgi_param_mapping) {
 818                 if ($symbol eq 'opt') {
 819                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 820                 } else {
 821                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 822                 }
 823         }
 824 }
 825
 826 # now read PATH_INFO and update the parameter list for missing parameters
 827 sub evaluate_path_info {
 828         return if defined $input_params{'project'};
 829         return if !$path_info;
 830         $path_info =~ s,^/+,,;
 831         return if !$path_info;
 832
 833         # find which part of PATH_INFO is project
 834         my $project = $path_info;
 835         $project =~ s,/+$,,;
 836         while ($project && !check_head_link("$projectroot/$project")) {
 837                 $project =~ s,/*[^/]*$,,;
 838         }
 839         return unless $project;
 840         $input_params{'project'} = $project;
 841
 842         # do not change any parameters if an action is given using the query string
 843         return if $input_params{'action'};
 844         $path_info =~ s,^\Q$project\E/*,,;
 845
 846         # next, check if we have an action
 847         my $action = $path_info;
 848         $action =~ s,/.*$,,;
 849         if (exists $actions{$action}) {
 850                 $path_info =~ s,^$action/*,,;
 851                 $input_params{'action'} = $action;
 852         }
 853
 854         # list of actions that want hash_base instead of hash, but can have no
 855         # pathname (f) parameter
 856         my @wants_base = (
 857                 'tree',
 858                 'history',
 859         );
 860
 861         # we want to catch, among others
 862         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 863         my ($parentrefname, $parentpathname, $refname, $pathname) =
 864                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 865
 866         # first, analyze the 'current' part
 867         if (defined $pathname) {
 868                 # we got "branch:filename" or "branch:dir/"
 869                 # we could use git_get_type(branch:pathname), but:
 870                 # - it needs $git_dir
 871                 # - it does a git() call
 872                 # - the convention of terminating directories with a slash
 873                 #   makes it superfluous
 874                 # - embedding the action in the PATH_INFO would make it even
 875                 #   more superfluous
 876                 $pathname =~ s,^/+,,;
 877                 if (!$pathname || substr($pathname, -1) eq "/") {
 878                         $input_params{'action'} ||= "tree";
 879                         $pathname =~ s,/$,,;
 880                 } else {
 881                         # the default action depends on whether we had parent info
 882                         # or not
 883                         if ($parentrefname) {
 884                                 $input_params{'action'} ||= "blobdiff_plain";
 885                         } else {
 886                                 $input_params{'action'} ||= "blob_plain";
 887                         }
 888                 }
 889                 $input_params{'hash_base'} ||= $refname;
 890                 $input_params{'file_name'} ||= $pathname;
 891         } elsif (defined $refname) {
 892                 # we got "branch". In this case we have to choose if we have to
 893                 # set hash or hash_base.
 894                 #
 895                 # Most of the actions without a pathname only want hash to be
 896                 # set, except for the ones specified in @wants_base that want
 897                 # hash_base instead. It should also be noted that hand-crafted
 898                 # links having 'history' as an action and no pathname or hash
 899                 # set will fail, but that happens regardless of PATH_INFO.
 900                 if (defined $parentrefname) {
 901                         # if there is parent let the default be 'shortlog' action
 902                         # (for http://git.example.com/repo.git/A..B links); if there
 903                         # is no parent, dispatch will detect type of object and set
 904                         # action appropriately if required (if action is not set)
 905                         $input_params{'action'} ||= "shortlog";
 906                 }
 907                 if ($input_params{'action'} &&
 908                     grep { $_ eq $input_params{'action'} } @wants_base) {
 909                         $input_params{'hash_base'} ||= $refname;
 910                 } else {
 911                         $input_params{'hash'} ||= $refname;
 912                 }
 913         }
 914
 915         # next, handle the 'parent' part, if present
 916         if (defined $parentrefname) {
 917                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 918                 # someproject/blobdiff/oldrev..newrev:/filename
 919                 if ($parentpathname) {
 920                         $parentpathname =~ s,^/+,,;
 921                         $parentpathname =~ s,/$,,;
 922                         $input_params{'file_parent'} ||= $parentpathname;
 923                 } else {
 924                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 925                 }
 926                 # we assume that hash_parent_base is wanted if a path was specified,
 927                 # or if the action wants hash_base instead of hash
 928                 if (defined $input_params{'file_parent'} ||
 929                         grep { $_ eq $input_params{'action'} } @wants_base) {
 930                         $input_params{'hash_parent_base'} ||= $parentrefname;
 931                 } else {
 932                         $input_params{'hash_parent'} ||= $parentrefname;
 933                 }
 934         }
 935
 936         # for the snapshot action, we allow URLs in the form
 937         # $project/snapshot/$hash.ext
 938         # where .ext determines the snapshot and gets removed from the
 939         # passed $refname to provide the $hash.
 940         #
 941         # To be able to tell that $refname includes the format extension, we
 942         # require the following two conditions to be satisfied:
 943         # - the hash input parameter MUST have been set from the $refname part
 944         #   of the URL (i.e. they must be equal)
 945         # - the snapshot format MUST NOT have been defined already (e.g. from
 946         #   CGI parameter sf)
 947         # It's also useless to try any matching unless $refname has a dot,
 948         # so we check for that too
 949         if (defined $input_params{'action'} &&
 950                 $input_params{'action'} eq 'snapshot' &&
 951                 defined $refname && index($refname, '.') != -1 &&
 952                 $refname eq $input_params{'hash'} &&
 953                 !defined $input_params{'snapshot_format'}) {
 954                 # We loop over the known snapshot formats, checking for
 955                 # extensions. Allowed extensions are both the defined suffix
 956                 # (which includes the initial dot already) and the snapshot
 957                 # format key itself, with a prepended dot
 958                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 959                         my $hash = $refname;
 960                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 961                                 next;
 962                         }
 963                         my $sfx = $1;
 964                         # a valid suffix was found, so set the snapshot format
 965                         # and reset the hash parameter
 966                         $input_params{'snapshot_format'} = $fmt;
 967                         $input_params{'hash'} = $hash;
 968                         # we also set the format suffix to the one requested
 969                         # in the URL: this way a request for e.g. .tgz returns
 970                         # a .tgz instead of a .tar.gz
 971                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 972                         last;
 973                 }
 974         }
 975 }
 976
 977 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 978      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 979      $searchtext, $search_regexp);
 980 sub evaluate_and_validate_params {
 981         our $action = $input_params{'action'};
 982         if (defined $action) {
 983                 if (!validate_action($action)) {
 984                         die_error(400, "Invalid action parameter");
 985                 }
 986         }
 987
 988         # parameters which are pathnames
 989         our $project = $input_params{'project'};
 990         if (defined $project) {
 991                 if (!validate_project($project)) {
 992                         undef $project;
 993                         die_error(404, "No such project");
 994                 }
 995         }
 996
 997         our $file_name = $input_params{'file_name'};
 998         if (defined $file_name) {
 999                 if (!validate_pathname($file_name)) {
1000                         die_error(400, "Invalid file parameter");
1001                 }
1002         }
1003
1004         our $file_parent = $input_params{'file_parent'};
1005         if (defined $file_parent) {
1006                 if (!validate_pathname($file_parent)) {
1007                         die_error(400, "Invalid file parent parameter");
1008                 }
1009         }
1010
1011         # parameters which are refnames
1012         our $hash = $input_params{'hash'};
1013         if (defined $hash) {
1014                 if (!validate_refname($hash)) {
1015                         die_error(400, "Invalid hash parameter");
1016                 }
1017         }
1018
1019         our $hash_parent = $input_params{'hash_parent'};
1020         if (defined $hash_parent) {
1021                 if (!validate_refname($hash_parent)) {
1022                         die_error(400, "Invalid hash parent parameter");
1023                 }
1024         }
1025
1026         our $hash_base = $input_params{'hash_base'};
1027         if (defined $hash_base) {
1028                 if (!validate_refname($hash_base)) {
1029                         die_error(400, "Invalid hash base parameter");
1030                 }
1031         }
1032
1033         our @extra_options = @{$input_params{'extra_options'}};
1034         # @extra_options is always defined, since it can only be (currently) set from
1035         # CGI, and $cgi->param() returns the empty array in array context if the param
1036         # is not set
1037         foreach my $opt (@extra_options) {
1038                 if (not exists $allowed_options{$opt}) {
1039                         die_error(400, "Invalid option parameter");
1040                 }
1041                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1042                         die_error(400, "Invalid option parameter for this action");
1043                 }
1044         }
1045
1046         our $hash_parent_base = $input_params{'hash_parent_base'};
1047         if (defined $hash_parent_base) {
1048                 if (!validate_refname($hash_parent_base)) {
1049                         die_error(400, "Invalid hash parent base parameter");
1050                 }
1051         }
1052
1053         # other parameters
1054         our $page = $input_params{'page'};
1055         if (defined $page) {
1056                 if ($page =~ m/[^0-9]/) {
1057                         die_error(400, "Invalid page parameter");
1058                 }
1059         }
1060
1061         our $searchtype = $input_params{'searchtype'};
1062         if (defined $searchtype) {
1063                 if ($searchtype =~ m/[^a-z]/) {
1064                         die_error(400, "Invalid searchtype parameter");
1065                 }
1066         }
1067
1068         our $search_use_regexp = $input_params{'search_use_regexp'};
1069
1070         our $searchtext = $input_params{'searchtext'};
1071         our $search_regexp;
1072         if (defined $searchtext) {
1073                 if (length($searchtext) < 2) {
1074                         die_error(403, "At least two characters are required for search parameter");
1075                 }
1076                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1077         }
1078 }
1079
1080 # path to the current git repository
1081 our $git_dir;
1082 sub evaluate_git_dir {
1083         our $git_dir = "$projectroot/$project" if $project;
1084 }
1085
1086 our (@snapshot_fmts, $git_avatar);
1087 sub configure_gitweb_features {
1088         # list of supported snapshot formats
1089         our @snapshot_fmts = gitweb_get_feature('snapshot');
1090         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1091
1092         # check that the avatar feature is set to a known provider name,
1093         # and for each provider check if the dependencies are satisfied.
1094         # if the provider name is invalid or the dependencies are not met,
1095         # reset $git_avatar to the empty string.
1096         our ($git_avatar) = gitweb_get_feature('avatar');
1097         if ($git_avatar eq 'gravatar') {
1098                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1099         } elsif ($git_avatar eq 'picon') {
1100                 # no dependencies
1101         } else {
1102                 $git_avatar = '';
1103         }
1104 }
1105
1106 # custom error handler: 'die <message>' is Internal Server Error
1107 sub handle_errors_html {
1108         my $msg = shift; # it is already HTML escaped
1109
1110         # to avoid infinite loop where error occurs in die_error,
1111         # change handler to default handler, disabling handle_errors_html
1112         set_message("Error occured when inside die_error:\n$msg");
1113
1114         # you cannot jump out of die_error when called as error handler;
1115         # the subroutine set via CGI::Carp::set_message is called _after_
1116         # HTTP headers are already written, so it cannot write them itself
1117         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1118 }
1119 set_message(\&handle_errors_html);
1120
1121 # dispatch
1122 sub dispatch {
1123         if (!defined $action) {
1124                 if (defined $hash) {
1125                         $action = git_get_type($hash);
1126                 } elsif (defined $hash_base && defined $file_name) {
1127                         $action = git_get_type("$hash_base:$file_name");
1128                 } elsif (defined $project) {
1129                         $action = 'summary';
1130                 } else {
1131                         $action = 'project_list';
1132                 }
1133         }
1134         if (!defined($actions{$action})) {
1135                 die_error(400, "Unknown action");
1136         }
1137         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1138             !$project) {
1139                 die_error(400, "Project needed");
1140         }
1141         $actions{$action}->();
1142 }
1143
1144 sub reset_timer {
1145         our $t0 = [ gettimeofday() ]
1146                 if defined $t0;
1147         our $number_of_git_cmds = 0;
1148 }
1149
1150 our $first_request = 1;
1151 sub run_request {
1152         reset_timer();
1153
1154         evaluate_uri();
1155         if ($first_request) {
1156                 evaluate_gitweb_config();
1157                 evaluate_git_version();
1158         }
1159         if ($per_request_config) {
1160                 if (ref($per_request_config) eq 'CODE') {
1161                         $per_request_config->();
1162                 } elsif (!$first_request) {
1163                         evaluate_gitweb_config();
1164                 }
1165         }
1166         check_loadavg();
1167
1168         # $projectroot and $projects_list might be set in gitweb config file
1169         $projects_list ||= $projectroot;
1170
1171         evaluate_query_params();
1172         evaluate_path_info();
1173         evaluate_and_validate_params();
1174         evaluate_git_dir();
1175
1176         configure_gitweb_features();
1177
1178         dispatch();
1179 }
1180
1181 our $is_last_request = sub { 1 };
1182 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1183 our $CGI = 'CGI';
1184 our $cgi;
1185 sub configure_as_fcgi {
1186         require CGI::Fast;
1187         our $CGI = 'CGI::Fast';
1188
1189         my $request_number = 0;
1190         # let each child service 100 requests
1191         our $is_last_request = sub { ++$request_number > 100 };
1192 }
1193 sub evaluate_argv {
1194         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1195         configure_as_fcgi()
1196                 if $script_name =~ /\.fcgi$/;
1197
1198         return unless (@ARGV);
1199
1200         require Getopt::Long;
1201         Getopt::Long::GetOptions(
1202                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1203                 'nproc|n=i' => sub {
1204                         my ($arg, $val) = @_;
1205                         return unless eval { require FCGI::ProcManager; 1; };
1206                         my $proc_manager = FCGI::ProcManager->new({
1207                                 n_processes => $val,
1208                         });
1209                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1210                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1211                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1212                 },
1213         );
1214 }
1215
1216 sub run {
1217         evaluate_argv();
1218
1219         $first_request = 1;
1220         $pre_listen_hook->()
1221                 if $pre_listen_hook;
1222
1223  REQUEST:
1224         while ($cgi = $CGI->new()) {
1225                 $pre_dispatch_hook->()
1226                         if $pre_dispatch_hook;
1227
1228                 run_request();
1229
1230                 $post_dispatch_hook->()
1231                         if $post_dispatch_hook;
1232                 $first_request = 0;
1233
1234                 last REQUEST if ($is_last_request->());
1235         }
1236
1237  DONE_GITWEB:
1238         1;
1239 }
1240
1241 run();
1242
1243 if (defined caller) {
1244         # wrapped in a subroutine processing requests,
1245         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1246         return;
1247 } else {
1248         # pure CGI script, serving single request
1249         exit;
1250 }
1251
1252 ## ======================================================================
1253 ## action links
1254
1255 # possible values of extra options
1256 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1257 # -replay => 1      - start from a current view (replay with modifications)
1258 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1259 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1260 sub href {
1261         my %params = @_;
1262         # default is to use -absolute url() i.e. $my_uri
1263         my $href = $params{-full} ? $my_url : $my_uri;
1264
1265         # implicit -replay, must be first of implicit params
1266         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1267
1268         $params{'project'} = $project unless exists $params{'project'};
1269
1270         if ($params{-replay}) {
1271                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1272                         if (!exists $params{$name}) {
1273                                 $params{$name} = $input_params{$name};
1274                         }
1275                 }
1276         }
1277
1278         my $use_pathinfo = gitweb_check_feature('pathinfo');
1279         if (defined $params{'project'} &&
1280             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1281                 # try to put as many parameters as possible in PATH_INFO:
1282                 #   - project name
1283                 #   - action
1284                 #   - hash_parent or hash_parent_base:/file_parent
1285                 #   - hash or hash_base:/filename
1286                 #   - the snapshot_format as an appropriate suffix
1287
1288                 # When the script is the root DirectoryIndex for the domain,
1289                 # $href here would be something like http://gitweb.example.com/
1290                 # Thus, we strip any trailing / from $href, to spare us double
1291                 # slashes in the final URL
1292                 $href =~ s,/$,,;
1293
1294                 # Then add the project name, if present
1295                 $href .= "/".esc_path_info($params{'project'});
1296                 delete $params{'project'};
1297
1298                 # since we destructively absorb parameters, we keep this
1299                 # boolean that remembers if we're handling a snapshot
1300                 my $is_snapshot = $params{'action'} eq 'snapshot';
1301
1302                 # Summary just uses the project path URL, any other action is
1303                 # added to the URL
1304                 if (defined $params{'action'}) {
1305                         $href .= "/".esc_path_info($params{'action'})
1306                                 unless $params{'action'} eq 'summary';
1307                         delete $params{'action'};
1308                 }
1309
1310                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1311                 # stripping nonexistent or useless pieces
1312                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1313                         || $params{'hash_parent'} || $params{'hash'});
1314                 if (defined $params{'hash_base'}) {
1315                         if (defined $params{'hash_parent_base'}) {
1316                                 $href .= esc_path_info($params{'hash_parent_base'});
1317                                 # skip the file_parent if it's the same as the file_name
1318                                 if (defined $params{'file_parent'}) {
1319                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1320                                                 delete $params{'file_parent'};
1321                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1322                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1323                                                 delete $params{'file_parent'};
1324                                         }
1325                                 }
1326                                 $href .= "..";
1327                                 delete $params{'hash_parent'};
1328                                 delete $params{'hash_parent_base'};
1329                         } elsif (defined $params{'hash_parent'}) {
1330                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1331                                 delete $params{'hash_parent'};
1332                         }
1333
1334                         $href .= esc_path_info($params{'hash_base'});
1335                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1336                                 $href .= ":/".esc_path_info($params{'file_name'});
1337                                 delete $params{'file_name'};
1338                         }
1339                         delete $params{'hash'};
1340                         delete $params{'hash_base'};
1341                 } elsif (defined $params{'hash'}) {
1342                         $href .= esc_path_info($params{'hash'});
1343                         delete $params{'hash'};
1344                 }
1345
1346                 # If the action was a snapshot, we can absorb the
1347                 # snapshot_format parameter too
1348                 if ($is_snapshot) {
1349                         my $fmt = $params{'snapshot_format'};
1350                         # snapshot_format should always be defined when href()
1351                         # is called, but just in case some code forgets, we
1352                         # fall back to the default
1353                         $fmt ||= $snapshot_fmts[0];
1354                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1355                         delete $params{'snapshot_format'};
1356                 }
1357         }
1358
1359         # now encode the parameters explicitly
1360         my @result = ();
1361         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1362                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1363                 if (defined $params{$name}) {
1364                         if (ref($params{$name}) eq "ARRAY") {
1365                                 foreach my $par (@{$params{$name}}) {
1366                                         push @result, $symbol . "=" . esc_param($par);
1367                                 }
1368                         } else {
1369                                 push @result, $symbol . "=" . esc_param($params{$name});
1370                         }
1371                 }
1372         }
1373         $href .= "?" . join(';', @result) if scalar @result;
1374
1375         # final transformation: trailing spaces must be escaped (URI-encoded)
1376         $href =~ s/(\s+)$/CGI::escape($1)/e;
1377
1378         if ($params{-anchor}) {
1379                 $href .= "#".esc_param($params{-anchor});
1380         }
1381
1382         return $href;
1383 }
1384
1385
1386 ## ======================================================================
1387 ## validation, quoting/unquoting and escaping
1388
1389 sub validate_action {
1390         my $input = shift || return undef;
1391         return undef unless exists $actions{$input};
1392         return $input;
1393 }
1394
1395 sub validate_project {
1396         my $input = shift || return undef;
1397         if (!validate_pathname($input) ||
1398                 !(-d "$projectroot/$input") ||
1399                 !check_export_ok("$projectroot/$input") ||
1400                 ($strict_export && !project_in_list($input))) {
1401                 return undef;
1402         } else {
1403                 return $input;
1404         }
1405 }
1406
1407 sub validate_pathname {
1408         my $input = shift || return undef;
1409
1410         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1411         # at the beginning, at the end, and between slashes.
1412         # also this catches doubled slashes
1413         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1414                 return undef;
1415         }
1416         # no null characters
1417         if ($input =~ m!\0!) {
1418                 return undef;
1419         }
1420         return $input;
1421 }
1422
1423 sub validate_refname {
1424         my $input = shift || return undef;
1425
1426         # textual hashes are O.K.
1427         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1428                 return $input;
1429         }
1430         # it must be correct pathname
1431         $input = validate_pathname($input)
1432                 or return undef;
1433         # restrictions on ref name according to git-check-ref-format
1434         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1435                 return undef;
1436         }
1437         return $input;
1438 }
1439
1440 # decode sequences of octets in utf8 into Perl's internal form,
1441 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1442 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1443 sub to_utf8 {
1444         my $str = shift;
1445         return undef unless defined $str;
1446
1447         if (utf8::is_utf8($str) || utf8::decode($str)) {
1448                 return $str;
1449         } else {
1450                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1451         }
1452 }
1453
1454 # quote unsafe chars, but keep the slash, even when it's not
1455 # correct, but quoted slashes look too horrible in bookmarks
1456 sub esc_param {
1457         my $str = shift;
1458         return undef unless defined $str;
1459         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1460         $str =~ s/ /\+/g;
1461         return $str;
1462 }
1463
1464 # the quoting rules for path_info fragment are slightly different
1465 sub esc_path_info {
1466         my $str = shift;
1467         return undef unless defined $str;
1468
1469         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1470         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1471
1472         return $str;
1473 }
1474
1475 # quote unsafe chars in whole URL, so some characters cannot be quoted
1476 sub esc_url {
1477         my $str = shift;
1478         return undef unless defined $str;
1479         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1480         $str =~ s/ /\+/g;
1481         return $str;
1482 }
1483
1484 # quote unsafe characters in HTML attributes
1485 sub esc_attr {
1486
1487         # for XHTML conformance escaping '"' to '&quot;' is not enough
1488         return esc_html(@_);
1489 }
1490
1491 # replace invalid utf8 character with SUBSTITUTION sequence
1492 sub esc_html {
1493         my $str = shift;
1494         my %opts = @_;
1495
1496         return undef unless defined $str;
1497
1498         $str = to_utf8($str);
1499         $str = $cgi->escapeHTML($str);
1500         if ($opts{'-nbsp'}) {
1501                 $str =~ s/ /&nbsp;/g;
1502         }
1503         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1504         return $str;
1505 }
1506
1507 # quote control characters and escape filename to HTML
1508 sub esc_path {
1509         my $str = shift;
1510         my %opts = @_;
1511
1512         return undef unless defined $str;
1513
1514         $str = to_utf8($str);
1515         $str = $cgi->escapeHTML($str);
1516         if ($opts{'-nbsp'}) {
1517                 $str =~ s/ /&nbsp;/g;
1518         }
1519         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1520         return $str;
1521 }
1522
1523 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1524 sub sanitize {
1525         my $str = shift;
1526
1527         return undef unless defined $str;
1528
1529         $str = to_utf8($str);
1530         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1531         return $str;
1532 }
1533
1534 # Make control characters "printable", using character escape codes (CEC)
1535 sub quot_cec {
1536         my $cntrl = shift;
1537         my %opts = @_;
1538         my %es = ( # character escape codes, aka escape sequences
1539                 "\t" => '\t',   # tab            (HT)
1540                 "\n" => '\n',   # line feed      (LF)
1541                 "\r" => '\r',   # carrige return (CR)
1542                 "\f" => '\f',   # form feed      (FF)
1543                 "\b" => '\b',   # backspace      (BS)
1544                 "\a" => '\a',   # alarm (bell)   (BEL)
1545                 "\e" => '\e',   # escape         (ESC)
1546                 "\013" => '\v', # vertical tab   (VT)
1547                 "\000" => '\0', # nul character  (NUL)
1548         );
1549         my $chr = ( (exists $es{$cntrl})
1550                     ? $es{$cntrl}
1551                     : sprintf('\%2x', ord($cntrl)) );
1552         if ($opts{-nohtml}) {
1553                 return $chr;
1554         } else {
1555                 return "<span class=\"cntrl\">$chr</span>";
1556         }
1557 }
1558
1559 # Alternatively use unicode control pictures codepoints,
1560 # Unicode "printable representation" (PR)
1561 sub quot_upr {
1562         my $cntrl = shift;
1563         my %opts = @_;
1564
1565         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1566         if ($opts{-nohtml}) {
1567                 return $chr;
1568         } else {
1569                 return "<span class=\"cntrl\">$chr</span>";
1570         }
1571 }
1572
1573 # git may return quoted and escaped filenames
1574 sub unquote {
1575         my $str = shift;
1576
1577         sub unq {
1578                 my $seq = shift;
1579                 my %es = ( # character escape codes, aka escape sequences
1580                         't' => "\t",   # tab            (HT, TAB)
1581                         'n' => "\n",   # newline        (NL)
1582                         'r' => "\r",   # return         (CR)
1583                         'f' => "\f",   # form feed      (FF)
1584                         'b' => "\b",   # backspace      (BS)
1585                         'a' => "\a",   # alarm (bell)   (BEL)
1586                         'e' => "\e",   # escape         (ESC)
1587                         'v' => "\013", # vertical tab   (VT)
1588                 );
1589
1590                 if ($seq =~ m/^[0-7]{1,3}$/) {
1591                         # octal char sequence
1592                         return chr(oct($seq));
1593                 } elsif (exists $es{$seq}) {
1594                         # C escape sequence, aka character escape code
1595                         return $es{$seq};
1596                 }
1597                 # quoted ordinary character
1598                 return $seq;
1599         }
1600
1601         if ($str =~ m/^"(.*)"$/) {
1602                 # needs unquoting
1603                 $str = $1;
1604                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1605         }
1606         return $str;
1607 }
1608
1609 # escape tabs (convert tabs to spaces)
1610 sub untabify {
1611         my $line = shift;
1612
1613         while ((my $pos = index($line, "\t")) != -1) {
1614                 if (my $count = (8 - ($pos % 8))) {
1615                         my $spaces = ' ' x $count;
1616                         $line =~ s/\t/$spaces/;
1617                 }
1618         }
1619
1620         return $line;
1621 }
1622
1623 sub project_in_list {
1624         my $project = shift;
1625         my @list = git_get_projects_list();
1626         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1627 }
1628
1629 ## ----------------------------------------------------------------------
1630 ## HTML aware string manipulation
1631
1632 # Try to chop given string on a word boundary between position
1633 # $len and $len+$add_len. If there is no word boundary there,
1634 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1635 # (marking chopped part) would be longer than given string.
1636 sub chop_str {
1637         my $str = shift;
1638         my $len = shift;
1639         my $add_len = shift || 10;
1640         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1641
1642         # Make sure perl knows it is utf8 encoded so we don't
1643         # cut in the middle of a utf8 multibyte char.
1644         $str = to_utf8($str);
1645
1646         # allow only $len chars, but don't cut a word if it would fit in $add_len
1647         # if it doesn't fit, cut it if it's still longer than the dots we would add
1648         # remove chopped character entities entirely
1649
1650         # when chopping in the middle, distribute $len into left and right part
1651         # return early if chopping wouldn't make string shorter
1652         if ($where eq 'center') {
1653                 return $str if ($len + 5 >= length($str)); # filler is length 5
1654                 $len = int($len/2);
1655         } else {
1656                 return $str if ($len + 4 >= length($str)); # filler is length 4
1657         }
1658
1659         # regexps: ending and beginning with word part up to $add_len
1660         my $endre = qr/.{$len}\w{0,$add_len}/;
1661         my $begre = qr/\w{0,$add_len}.{$len}/;
1662
1663         if ($where eq 'left') {
1664                 $str =~ m/^(.*?)($begre)$/;
1665                 my ($lead, $body) = ($1, $2);
1666                 if (length($lead) > 4) {
1667                         $lead = " ...";
1668                 }
1669                 return "$lead$body";
1670
1671         } elsif ($where eq 'center') {
1672                 $str =~ m/^($endre)(.*)$/;
1673                 my ($left, $str)  = ($1, $2);
1674                 $str =~ m/^(.*?)($begre)$/;
1675                 my ($mid, $right) = ($1, $2);
1676                 if (length($mid) > 5) {
1677                         $mid = " ... ";
1678                 }
1679                 return "$left$mid$right";
1680
1681         } else {
1682                 $str =~ m/^($endre)(.*)$/;
1683                 my $body = $1;
1684                 my $tail = $2;
1685                 if (length($tail) > 4) {
1686                         $tail = "... ";
1687                 }
1688                 return "$body$tail";
1689         }
1690 }
1691
1692 # takes the same arguments as chop_str, but also wraps a <span> around the
1693 # result with a title attribute if it does get chopped. Additionally, the
1694 # string is HTML-escaped.
1695 sub chop_and_escape_str {
1696         my ($str) = @_;
1697
1698         my $chopped = chop_str(@_);
1699         $str = to_utf8($str);
1700         if ($chopped eq $str) {
1701                 return esc_html($chopped);
1702         } else {
1703                 $str =~ s/[[:cntrl:]]/?/g;
1704                 return $cgi->span({-title=>$str}, esc_html($chopped));
1705         }
1706 }
1707
1708 ## ----------------------------------------------------------------------
1709 ## functions returning short strings
1710
1711 # CSS class for given age value (in seconds)
1712 sub age_class {
1713         my $age = shift;
1714
1715         if (!defined $age) {
1716                 return "noage";
1717         } elsif ($age < 60*60*2) {
1718                 return "age0";
1719         } elsif ($age < 60*60*24*2) {
1720                 return "age1";
1721         } else {
1722                 return "age2";
1723         }
1724 }
1725
1726 # convert age in seconds to "nn units ago" string
1727 sub age_string {
1728         my $age = shift;
1729         my $age_str;
1730
1731         if ($age > 60*60*24*365*2) {
1732                 $age_str = (int $age/60/60/24/365);
1733                 $age_str .= " years ago";
1734         } elsif ($age > 60*60*24*(365/12)*2) {
1735                 $age_str = int $age/60/60/24/(365/12);
1736                 $age_str .= " months ago";
1737         } elsif ($age > 60*60*24*7*2) {
1738                 $age_str = int $age/60/60/24/7;
1739                 $age_str .= " weeks ago";
1740         } elsif ($age > 60*60*24*2) {
1741                 $age_str = int $age/60/60/24;
1742                 $age_str .= " days ago";
1743         } elsif ($age > 60*60*2) {
1744                 $age_str = int $age/60/60;
1745                 $age_str .= " hours ago";
1746         } elsif ($age > 60*2) {
1747                 $age_str = int $age/60;
1748                 $age_str .= " min ago";
1749         } elsif ($age > 2) {
1750                 $age_str = int $age;
1751                 $age_str .= " sec ago";
1752         } else {
1753                 $age_str .= " right now";
1754         }
1755         return $age_str;
1756 }
1757
1758 use constant {
1759         S_IFINVALID => 0030000,
1760         S_IFGITLINK => 0160000,
1761 };
1762
1763 # submodule/subproject, a commit object reference
1764 sub S_ISGITLINK {
1765         my $mode = shift;
1766
1767         return (($mode & S_IFMT) == S_IFGITLINK)
1768 }
1769
1770 # convert file mode in octal to symbolic file mode string
1771 sub mode_str {
1772         my $mode = oct shift;
1773
1774         if (S_ISGITLINK($mode)) {
1775                 return 'm---------';
1776         } elsif (S_ISDIR($mode & S_IFMT)) {
1777                 return 'drwxr-xr-x';
1778         } elsif (S_ISLNK($mode)) {
1779                 return 'lrwxrwxrwx';
1780         } elsif (S_ISREG($mode)) {
1781                 # git cares only about the executable bit
1782                 if ($mode & S_IXUSR) {
1783                         return '-rwxr-xr-x';
1784                 } else {
1785                         return '-rw-r--r--';
1786                 };
1787         } else {
1788                 return '----------';
1789         }
1790 }
1791
1792 # convert file mode in octal to file type string
1793 sub file_type {
1794         my $mode = shift;
1795
1796         if ($mode !~ m/^[0-7]+$/) {
1797                 return $mode;
1798         } else {
1799                 $mode = oct $mode;
1800         }
1801
1802         if (S_ISGITLINK($mode)) {
1803                 return "submodule";
1804         } elsif (S_ISDIR($mode & S_IFMT)) {
1805                 return "directory";
1806         } elsif (S_ISLNK($mode)) {
1807                 return "symlink";
1808         } elsif (S_ISREG($mode)) {
1809                 return "file";
1810         } else {
1811                 return "unknown";
1812         }
1813 }
1814
1815 # convert file mode in octal to file type description string
1816 sub file_type_long {
1817         my $mode = shift;
1818
1819         if ($mode !~ m/^[0-7]+$/) {
1820                 return $mode;
1821         } else {
1822                 $mode = oct $mode;
1823         }
1824
1825         if (S_ISGITLINK($mode)) {
1826                 return "submodule";
1827         } elsif (S_ISDIR($mode & S_IFMT)) {
1828                 return "directory";
1829         } elsif (S_ISLNK($mode)) {
1830                 return "symlink";
1831         } elsif (S_ISREG($mode)) {
1832                 if ($mode & S_IXUSR) {
1833                         return "executable";
1834                 } else {
1835                         return "file";
1836                 };
1837         } else {
1838                 return "unknown";
1839         }
1840 }
1841
1842
1843 ## ----------------------------------------------------------------------
1844 ## functions returning short HTML fragments, or transforming HTML fragments
1845 ## which don't belong to other sections
1846
1847 # format line of commit message.
1848 sub format_log_line_html {
1849         my $line = shift;
1850
1851         $line = esc_html($line, -nbsp=>1);
1852         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1853                 $cgi->a({-href => href(action=>"object", hash=>$1),
1854                                         -class => "text"}, $1);
1855         }eg;
1856
1857         return $line;
1858 }
1859
1860 # format marker of refs pointing to given object
1861
1862 # the destination action is chosen based on object type and current context:
1863 # - for annotated tags, we choose the tag view unless it's the current view
1864 #   already, in which case we go to shortlog view
1865 # - for other refs, we keep the current view if we're in history, shortlog or
1866 #   log view, and select shortlog otherwise
1867 sub format_ref_marker {
1868         my ($refs, $id) = @_;
1869         my $markers = '';
1870
1871         if (defined $refs->{$id}) {
1872                 foreach my $ref (@{$refs->{$id}}) {
1873                         # this code exploits the fact that non-lightweight tags are the
1874                         # only indirect objects, and that they are the only objects for which
1875                         # we want to use tag instead of shortlog as action
1876                         my ($type, $name) = qw();
1877                         my $indirect = ($ref =~ s/\^\{\}$//);
1878                         # e.g. tags/v2.6.11 or heads/next
1879                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1880                                 $type = $1;
1881                                 $name = $2;
1882                         } else {
1883                                 $type = "ref";
1884                                 $name = $ref;
1885                         }
1886
1887                         my $class = $type;
1888                         $class .= " indirect" if $indirect;
1889
1890                         my $dest_action = "shortlog";
1891
1892                         if ($indirect) {
1893                                 $dest_action = "tag" unless $action eq "tag";
1894                         } elsif ($action =~ /^(history|(short)?log)$/) {
1895                                 $dest_action = $action;
1896                         }
1897
1898                         my $dest = "";
1899                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1900                         $dest .= $ref;
1901
1902                         my $link = $cgi->a({
1903                                 -href => href(
1904                                         action=>$dest_action,
1905                                         hash=>$dest
1906                                 )}, $name);
1907
1908                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1909                                 $link . "</span>";
1910                 }
1911         }
1912
1913         if ($markers) {
1914                 return ' <span class="refs">'. $markers . '</span>';
1915         } else {
1916                 return "";
1917         }
1918 }
1919
1920 # format, perhaps shortened and with markers, title line
1921 sub format_subject_html {
1922         my ($long, $short, $href, $extra) = @_;
1923         $extra = '' unless defined($extra);
1924
1925         if (length($short) < length($long)) {
1926                 $long =~ s/[[:cntrl:]]/?/g;
1927                 return $cgi->a({-href => $href, -class => "list subject",
1928                                 -title => to_utf8($long)},
1929                        esc_html($short)) . $extra;
1930         } else {
1931                 return $cgi->a({-href => $href, -class => "list subject"},
1932                        esc_html($long)) . $extra;
1933         }
1934 }
1935
1936 # Rather than recomputing the url for an email multiple times, we cache it
1937 # after the first hit. This gives a visible benefit in views where the avatar
1938 # for the same email is used repeatedly (e.g. shortlog).
1939 # The cache is shared by all avatar engines (currently gravatar only), which
1940 # are free to use it as preferred. Since only one avatar engine is used for any
1941 # given page, there's no risk for cache conflicts.
1942 our %avatar_cache = ();
1943
1944 # Compute the picon url for a given email, by using the picon search service over at
1945 # http://www.cs.indiana.edu/picons/search.html
1946 sub picon_url {
1947         my $email = lc shift;
1948         if (!$avatar_cache{$email}) {
1949                 my ($user, $domain) = split('@', $email);
1950                 $avatar_cache{$email} =
1951                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1952                         "$domain/$user/" .
1953                         "users+domains+unknown/up/single";
1954         }
1955         return $avatar_cache{$email};
1956 }
1957
1958 # Compute the gravatar url for a given email, if it's not in the cache already.
1959 # Gravatar stores only the part of the URL before the size, since that's the
1960 # one computationally more expensive. This also allows reuse of the cache for
1961 # different sizes (for this particular engine).
1962 sub gravatar_url {
1963         my $email = lc shift;
1964         my $size = shift;
1965         $avatar_cache{$email} ||=
1966                 "http://www.gravatar.com/avatar/" .
1967                         Digest::MD5::md5_hex($email) . "?s=";
1968         return $avatar_cache{$email} . $size;
1969 }
1970
1971 # Insert an avatar for the given $email at the given $size if the feature
1972 # is enabled.
1973 sub git_get_avatar {
1974         my ($email, %opts) = @_;
1975         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1976         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1977         $opts{-size} ||= 'default';
1978         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1979         my $url = "";
1980         if ($git_avatar eq 'gravatar') {
1981                 $url = gravatar_url($email, $size);
1982         } elsif ($git_avatar eq 'picon') {
1983                 $url = picon_url($email);
1984         }
1985         # Other providers can be added by extending the if chain, defining $url
1986         # as needed. If no variant puts something in $url, we assume avatars
1987         # are completely disabled/unavailable.
1988         if ($url) {
1989                 return $pre_white .
1990                        "<img width=\"$size\" " .
1991                             "class=\"avatar\" " .
1992                             "src=\"".esc_url($url)."\" " .
1993                             "alt=\"\" " .
1994                        "/>" . $post_white;
1995         } else {
1996                 return "";
1997         }
1998 }
1999
2000 sub format_search_author {
2001         my ($author, $searchtype, $displaytext) = @_;
2002         my $have_search = gitweb_check_feature('search');
2003
2004         if ($have_search) {
2005                 my $performed = "";
2006                 if ($searchtype eq 'author') {
2007                         $performed = "authored";
2008                 } elsif ($searchtype eq 'committer') {
2009                         $performed = "committed";
2010                 }
2011
2012                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2013                                 searchtext=>$author,
2014                                 searchtype=>$searchtype), class=>"list",
2015                                 title=>"Search for commits $performed by $author"},
2016                                 $displaytext);
2017
2018         } else {
2019                 return $displaytext;
2020         }
2021 }
2022
2023 # format the author name of the given commit with the given tag
2024 # the author name is chopped and escaped according to the other
2025 # optional parameters (see chop_str).
2026 sub format_author_html {
2027         my $tag = shift;
2028         my $co = shift;
2029         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2030         return "<$tag class=\"author\">" .
2031                format_search_author($co->{'author_name'}, "author",
2032                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2033                        $author) .
2034                "</$tag>";
2035 }
2036
2037 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2038 sub format_git_diff_header_line {
2039         my $line = shift;
2040         my $diffinfo = shift;
2041         my ($from, $to) = @_;
2042
2043         if ($diffinfo->{'nparents'}) {
2044                 # combined diff
2045                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2046                 if ($to->{'href'}) {
2047                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2048                                          esc_path($to->{'file'}));
2049                 } else { # file was deleted (no href)
2050                         $line .= esc_path($to->{'file'});
2051                 }
2052         } else {
2053                 # "ordinary" diff
2054                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2055                 if ($from->{'href'}) {
2056                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2057                                          'a/' . esc_path($from->{'file'}));
2058                 } else { # file was added (no href)
2059                         $line .= 'a/' . esc_path($from->{'file'});
2060                 }
2061                 $line .= ' ';
2062                 if ($to->{'href'}) {
2063                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2064                                          'b/' . esc_path($to->{'file'}));
2065                 } else { # file was deleted
2066                         $line .= 'b/' . esc_path($to->{'file'});
2067                 }
2068         }
2069
2070         return "<div class=\"diff header\">$line</div>\n";
2071 }
2072
2073 # format extended diff header line, before patch itself
2074 sub format_extended_diff_header_line {
2075         my $line = shift;
2076         my $diffinfo = shift;
2077         my ($from, $to) = @_;
2078
2079         # match <path>
2080         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2081                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2082                                        esc_path($from->{'file'}));
2083         }
2084         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2085                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2086                                  esc_path($to->{'file'}));
2087         }
2088         # match single <mode>
2089         if ($line =~ m/\s(\d{6})$/) {
2090                 $line .= '<span class="info"> (' .
2091                          file_type_long($1) .
2092                          ')</span>';
2093         }
2094         # match <hash>
2095         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2096                 # can match only for combined diff
2097                 $line = 'index ';
2098                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2099                         if ($from->{'href'}[$i]) {
2100                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2101                                                   -class=>"hash"},
2102                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2103                         } else {
2104                                 $line .= '0' x 7;
2105                         }
2106                         # separator
2107                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2108                 }
2109                 $line .= '..';
2110                 if ($to->{'href'}) {
2111                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2112                                          substr($diffinfo->{'to_id'},0,7));
2113                 } else {
2114                         $line .= '0' x 7;
2115                 }
2116
2117         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2118                 # can match only for ordinary diff
2119                 my ($from_link, $to_link);
2120                 if ($from->{'href'}) {
2121                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2122                                              substr($diffinfo->{'from_id'},0,7));
2123                 } else {
2124                         $from_link = '0' x 7;
2125                 }
2126                 if ($to->{'href'}) {
2127                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2128                                            substr($diffinfo->{'to_id'},0,7));
2129                 } else {
2130                         $to_link = '0' x 7;
2131                 }
2132                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2133                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2134         }
2135
2136         return $line . "<br/>\n";
2137 }
2138
2139 # format from-file/to-file diff header
2140 sub format_diff_from_to_header {
2141         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2142         my $line;
2143         my $result = '';
2144
2145         $line = $from_line;
2146         #assert($line =~ m/^---/) if DEBUG;
2147         # no extra formatting for "^--- /dev/null"
2148         if (! $diffinfo->{'nparents'}) {
2149                 # ordinary (single parent) diff
2150                 if ($line =~ m!^--- "?a/!) {
2151                         if ($from->{'href'}) {
2152                                 $line = '--- a/' .
2153                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2154                                                 esc_path($from->{'file'}));
2155                         } else {
2156                                 $line = '--- a/' .
2157                                         esc_path($from->{'file'});
2158                         }
2159                 }
2160                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2161
2162         } else {
2163                 # combined diff (merge commit)
2164                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2165                         if ($from->{'href'}[$i]) {
2166                                 $line = '--- ' .
2167                                         $cgi->a({-href=>href(action=>"blobdiff",
2168                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2169                                                              hash_parent_base=>$parents[$i],
2170                                                              file_parent=>$from->{'file'}[$i],
2171                                                              hash=>$diffinfo->{'to_id'},
2172                                                              hash_base=>$hash,
2173                                                              file_name=>$to->{'file'}),
2174                                                  -class=>"path",
2175                                                  -title=>"diff" . ($i+1)},
2176                                                 $i+1) .
2177                                         '/' .
2178                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2179                                                 esc_path($from->{'file'}[$i]));
2180                         } else {
2181                                 $line = '--- /dev/null';
2182                         }
2183                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2184                 }
2185         }
2186
2187         $line = $to_line;
2188         #assert($line =~ m/^\+\+\+/) if DEBUG;
2189         # no extra formatting for "^+++ /dev/null"
2190         if ($line =~ m!^\+\+\+ "?b/!) {
2191                 if ($to->{'href'}) {
2192                         $line = '+++ b/' .
2193                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2194                                         esc_path($to->{'file'}));
2195                 } else {
2196                         $line = '+++ b/' .
2197                                 esc_path($to->{'file'});
2198                 }
2199         }
2200         $result .= qq!<div class="diff to_file">$line</div>\n!;
2201
2202         return $result;
2203 }
2204
2205 # create note for patch simplified by combined diff
2206 sub format_diff_cc_simplified {
2207         my ($diffinfo, @parents) = @_;
2208         my $result = '';
2209
2210         $result .= "<div class=\"diff header\">" .
2211                    "diff --cc ";
2212         if (!is_deleted($diffinfo)) {
2213                 $result .= $cgi->a({-href => href(action=>"blob",
2214                                                   hash_base=>$hash,
2215                                                   hash=>$diffinfo->{'to_id'},
2216                                                   file_name=>$diffinfo->{'to_file'}),
2217                                     -class => "path"},
2218                                    esc_path($diffinfo->{'to_file'}));
2219         } else {
2220                 $result .= esc_path($diffinfo->{'to_file'});
2221         }
2222         $result .= "</div>\n" . # class="diff header"
2223                    "<div class=\"diff nodifferences\">" .
2224                    "Simple merge" .
2225                    "</div>\n"; # class="diff nodifferences"
2226
2227         return $result;
2228 }
2229
2230 sub diff_line_class {
2231         my ($line, $from, $to) = @_;
2232
2233         # ordinary diff
2234         my $num_sign = 1;
2235         # combined diff
2236         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2237                 $num_sign = scalar @{$from->{'href'}};
2238         }
2239
2240         my @diff_line_classifier = (
2241                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2242                 { regexp => qr/^\\/,               class => "incomplete"  },
2243                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2244                 # classifier for context must come before classifier add/rem,
2245                 # or we would have to use more complicated regexp, for example
2246                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2247                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2248                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2249         );
2250         for my $clsfy (@diff_line_classifier) {
2251                 return $clsfy->{'class'}
2252                         if ($line =~ $clsfy->{'regexp'});
2253         }
2254
2255         # fallback
2256         return "";
2257 }
2258
2259 # assumes that $from and $to are defined and correctly filled,
2260 # and that $line holds a line of chunk header for unified diff
2261 sub format_unidiff_chunk_header {
2262         my ($line, $from, $to) = @_;
2263
2264         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2265                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2266
2267         $from_lines = 0 unless defined $from_lines;
2268         $to_lines   = 0 unless defined $to_lines;
2269
2270         if ($from->{'href'}) {
2271                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2272                                      -class=>"list"}, $from_text);
2273         }
2274         if ($to->{'href'}) {
2275                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2276                                      -class=>"list"}, $to_text);
2277         }
2278         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2279                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2280         return $line;
2281 }
2282
2283 # assumes that $from and $to are defined and correctly filled,
2284 # and that $line holds a line of chunk header for combined diff
2285 sub format_cc_diff_chunk_header {
2286         my ($line, $from, $to) = @_;
2287
2288         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2289         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2290
2291         @from_text = split(' ', $ranges);
2292         for (my $i = 0; $i < @from_text; ++$i) {
2293                 ($from_start[$i], $from_nlines[$i]) =
2294                         (split(',', substr($from_text[$i], 1)), 0);
2295         }
2296
2297         $to_text   = pop @from_text;
2298         $to_start  = pop @from_start;
2299         $to_nlines = pop @from_nlines;
2300
2301         $line = "<span class=\"chunk_info\">$prefix ";
2302         for (my $i = 0; $i < @from_text; ++$i) {
2303                 if ($from->{'href'}[$i]) {
2304                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2305                                           -class=>"list"}, $from_text[$i]);
2306                 } else {
2307                         $line .= $from_text[$i];
2308                 }
2309                 $line .= " ";
2310         }
2311         if ($to->{'href'}) {
2312                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2313                                   -class=>"list"}, $to_text);
2314         } else {
2315                 $line .= $to_text;
2316         }
2317         $line .= " $prefix</span>" .
2318                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2319         return $line;
2320 }
2321
2322 # process patch (diff) line (not to be used for diff headers),
2323 # returning class and HTML-formatted (but not wrapped) line
2324 sub process_diff_line {
2325         my $line = shift;
2326         my ($from, $to) = @_;
2327
2328         my $diff_class = diff_line_class($line, $from, $to);
2329
2330         chomp $line;
2331         $line = untabify($line);
2332
2333         if ($from && $to && $line =~ m/^\@{2} /) {
2334                 $line = format_unidiff_chunk_header($line, $from, $to);
2335                 return $diff_class, $line;
2336
2337         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2338                 $line = format_cc_diff_chunk_header($line, $from, $to);
2339                 return $diff_class, $line;
2340
2341         }
2342         return $diff_class, esc_html($line, -nbsp=>1);
2343 }
2344
2345 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2346 # linked.  Pass the hash of the tree/commit to snapshot.
2347 sub format_snapshot_links {
2348         my ($hash) = @_;
2349         my $num_fmts = @snapshot_fmts;
2350         if ($num_fmts > 1) {
2351                 # A parenthesized list of links bearing format names.
2352                 # e.g. "snapshot (_tar.gz_ _zip_)"
2353                 return "snapshot (" . join(' ', map
2354                         $cgi->a({
2355                                 -href => href(
2356                                         action=>"snapshot",
2357                                         hash=>$hash,
2358                                         snapshot_format=>$_
2359                                 )
2360                         }, $known_snapshot_formats{$_}{'display'})
2361                 , @snapshot_fmts) . ")";
2362         } elsif ($num_fmts == 1) {
2363                 # A single "snapshot" link whose tooltip bears the format name.
2364                 # i.e. "_snapshot_"
2365                 my ($fmt) = @snapshot_fmts;
2366                 return
2367                         $cgi->a({
2368                                 -href => href(
2369                                         action=>"snapshot",
2370                                         hash=>$hash,
2371                                         snapshot_format=>$fmt
2372                                 ),
2373                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2374                         }, "snapshot");
2375         } else { # $num_fmts == 0
2376                 return undef;
2377         }
2378 }
2379
2380 ## ......................................................................
2381 ## functions returning values to be passed, perhaps after some
2382 ## transformation, to other functions; e.g. returning arguments to href()
2383
2384 # returns hash to be passed to href to generate gitweb URL
2385 # in -title key it returns description of link
2386 sub get_feed_info {
2387         my $format = shift || 'Atom';
2388         my %res = (action => lc($format));
2389
2390         # feed links are possible only for project views
2391         return unless (defined $project);
2392         # some views should link to OPML, or to generic project feed,
2393         # or don't have specific feed yet (so they should use generic)
2394         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2395
2396         my $branch;
2397         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2398         # from tag links; this also makes possible to detect branch links
2399         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2400             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2401                 $branch = $1;
2402         }
2403         # find log type for feed description (title)
2404         my $type = 'log';
2405         if (defined $file_name) {
2406                 $type  = "history of $file_name";
2407                 $type .= "/" if ($action eq 'tree');
2408                 $type .= " on '$branch'" if (defined $branch);
2409         } else {
2410                 $type = "log of $branch" if (defined $branch);
2411         }
2412
2413         $res{-title} = $type;
2414         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2415         $res{'file_name'} = $file_name;
2416
2417         return %res;
2418 }
2419
2420 ## ----------------------------------------------------------------------
2421 ## git utility subroutines, invoking git commands
2422
2423 # returns path to the core git executable and the --git-dir parameter as list
2424 sub git_cmd {
2425         $number_of_git_cmds++;
2426         return $GIT, '--git-dir='.$git_dir;
2427 }
2428
2429 # quote the given arguments for passing them to the shell
2430 # quote_command("command", "arg 1", "arg with ' and ! characters")
2431 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2432 # Try to avoid using this function wherever possible.
2433 sub quote_command {
2434         return join(' ',
2435                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2436 }
2437
2438 # get HEAD ref of given project as hash
2439 sub git_get_head_hash {
2440         return git_get_full_hash(shift, 'HEAD');
2441 }
2442
2443 sub git_get_full_hash {
2444         return git_get_hash(@_);
2445 }
2446
2447 sub git_get_short_hash {
2448         return git_get_hash(@_, '--short=7');
2449 }
2450
2451 sub git_get_hash {
2452         my ($project, $hash, @options) = @_;
2453         my $o_git_dir = $git_dir;
2454         my $retval = undef;
2455         $git_dir = "$projectroot/$project";
2456         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2457             '--verify', '-q', @options, $hash) {
2458                 $retval = <$fd>;
2459                 chomp $retval if defined $retval;
2460                 close $fd;
2461         }
2462         if (defined $o_git_dir) {
2463                 $git_dir = $o_git_dir;
2464         }
2465         return $retval;
2466 }
2467
2468 # get type of given object
2469 sub git_get_type {
2470         my $hash = shift;
2471
2472         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2473         my $type = <$fd>;
2474         close $fd or return;
2475         chomp $type;
2476         return $type;
2477 }
2478
2479 # repository configuration
2480 our $config_file = '';
2481 our %config;
2482
2483 # store multiple values for single key as anonymous array reference
2484 # single values stored directly in the hash, not as [ <value> ]
2485 sub hash_set_multi {
2486         my ($hash, $key, $value) = @_;
2487
2488         if (!exists $hash->{$key}) {
2489                 $hash->{$key} = $value;
2490         } elsif (!ref $hash->{$key}) {
2491                 $hash->{$key} = [ $hash->{$key}, $value ];
2492         } else {
2493                 push @{$hash->{$key}}, $value;
2494         }
2495 }
2496
2497 # return hash of git project configuration
2498 # optionally limited to some section, e.g. 'gitweb'
2499 sub git_parse_project_config {
2500         my $section_regexp = shift;
2501         my %config;
2502
2503         local $/ = "\0";
2504
2505         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2506                 or return;
2507
2508         while (my $keyval = <$fh>) {
2509                 chomp $keyval;
2510                 my ($key, $value) = split(/\n/, $keyval, 2);
2511
2512                 hash_set_multi(\%config, $key, $value)
2513                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2514         }
2515         close $fh;
2516
2517         return %config;
2518 }
2519
2520 # convert config value to boolean: 'true' or 'false'
2521 # no value, number > 0, 'true' and 'yes' values are true
2522 # rest of values are treated as false (never as error)
2523 sub config_to_bool {
2524         my $val = shift;
2525
2526         return 1 if !defined $val;             # section.key
2527
2528         # strip leading and trailing whitespace
2529         $val =~ s/^\s+//;
2530         $val =~ s/\s+$//;
2531
2532         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2533                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2534 }
2535
2536 # convert config value to simple decimal number
2537 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2538 # to be multiplied by 1024, 1048576, or 1073741824
2539 sub config_to_int {
2540         my $val = shift;
2541
2542         # strip leading and trailing whitespace
2543         $val =~ s/^\s+//;
2544         $val =~ s/\s+$//;
2545
2546         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2547                 $unit = lc($unit);
2548                 # unknown unit is treated as 1
2549                 return $num * ($unit eq 'g' ? 1073741824 :
2550                                $unit eq 'm' ?    1048576 :
2551                                $unit eq 'k' ?       1024 : 1);
2552         }
2553         return $val;
2554 }
2555
2556 # convert config value to array reference, if needed
2557 sub config_to_multi {
2558         my $val = shift;
2559
2560         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2561 }
2562
2563 sub git_get_project_config {
2564         my ($key, $type) = @_;
2565
2566         return unless defined $git_dir;
2567
2568         # key sanity check
2569         return unless ($key);
2570         # only subsection, if exists, is case sensitive,
2571         # and not lowercased by 'git config -z -l'
2572         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2573                 $key = join(".", lc($hi), $mi, lc($lo));
2574         } else {
2575                 $key = lc($key);
2576         }
2577         $key =~ s/^gitweb\.//;
2578         return if ($key =~ m/\W/);
2579
2580         # type sanity check
2581         if (defined $type) {
2582                 $type =~ s/^--//;
2583                 $type = undef
2584                         unless ($type eq 'bool' || $type eq 'int');
2585         }
2586
2587         # get config
2588         if (!defined $config_file ||
2589             $config_file ne "$git_dir/config") {
2590                 %config = git_parse_project_config('gitweb');
2591                 $config_file = "$git_dir/config";
2592         }
2593
2594         # check if config variable (key) exists
2595         return unless exists $config{"gitweb.$key"};
2596
2597         # ensure given type
2598         if (!defined $type) {
2599                 return $config{"gitweb.$key"};
2600         } elsif ($type eq 'bool') {
2601                 # backward compatibility: 'git config --bool' returns true/false
2602                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2603         } elsif ($type eq 'int') {
2604                 return config_to_int($config{"gitweb.$key"});
2605         }
2606         return $config{"gitweb.$key"};
2607 }
2608
2609 # get hash of given path at given ref
2610 sub git_get_hash_by_path {
2611         my $base = shift;
2612         my $path = shift || return undef;
2613         my $type = shift;
2614
2615         $path =~ s,/+$,,;
2616
2617         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2618                 or die_error(500, "Open git-ls-tree failed");
2619         my $line = <$fd>;
2620         close $fd or return undef;
2621
2622         if (!defined $line) {
2623                 # there is no tree or hash given by $path at $base
2624                 return undef;
2625         }
2626
2627         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2628         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2629         if (defined $type && $type ne $2) {
2630                 # type doesn't match
2631                 return undef;
2632         }
2633         return $3;
2634 }
2635
2636 # get path of entry with given hash at given tree-ish (ref)
2637 # used to get 'from' filename for combined diff (merge commit) for renames
2638 sub git_get_path_by_hash {
2639         my $base = shift || return;
2640         my $hash = shift || return;
2641
2642         local $/ = "\0";
2643
2644         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2645                 or return undef;
2646         while (my $line = <$fd>) {
2647                 chomp $line;
2648
2649                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2650                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2651                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2652                         close $fd;
2653                         return $1;
2654                 }
2655         }
2656         close $fd;
2657         return undef;
2658 }
2659
2660 ## ......................................................................
2661 ## git utility functions, directly accessing git repository
2662
2663 # get the value of config variable either from file named as the variable
2664 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2665 # configuration variable in the repository config file.
2666 sub git_get_file_or_project_config {
2667         my ($path, $name) = @_;
2668
2669         $git_dir = "$projectroot/$path";
2670         open my $fd, '<', "$git_dir/$name"
2671                 or return git_get_project_config($name);
2672         my $conf = <$fd>;
2673         close $fd;
2674         if (defined $conf) {
2675                 chomp $conf;
2676         }
2677         return $conf;
2678 }
2679
2680 sub git_get_project_description {
2681         my $path = shift;
2682         return git_get_file_or_project_config($path, 'description');
2683 }
2684
2685 sub git_get_project_category {
2686         my $path = shift;
2687         return git_get_file_or_project_config($path, 'category');
2688 }
2689
2690
2691 # supported formats:
2692 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2693 #   - if its contents is a number, use it as tag weight,
2694 #   - otherwise add a tag with weight 1
2695 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2696 #   the same value multiple times increases tag weight
2697 # * `gitweb.ctag' multi-valued repo config variable
2698 sub git_get_project_ctags {
2699         my $project = shift;
2700         my $ctags = {};
2701
2702         $git_dir = "$projectroot/$project";
2703         if (opendir my $dh, "$git_dir/ctags") {
2704                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2705                 foreach my $tagfile (@files) {
2706                         open my $ct, '<', $tagfile
2707                                 or next;
2708                         my $val = <$ct>;
2709                         chomp $val if $val;
2710                         close $ct;
2711
2712                         (my $ctag = $tagfile) =~ s#.*/##;
2713                         if ($val =~ /^\d+$/) {
2714                                 $ctags->{$ctag} = $val;
2715                         } else {
2716                                 $ctags->{$ctag} = 1;
2717                         }
2718                 }
2719                 closedir $dh;
2720
2721         } elsif (open my $fh, '<', "$git_dir/ctags") {
2722                 while (my $line = <$fh>) {
2723                         chomp $line;
2724                         $ctags->{$line}++ if $line;
2725                 }
2726                 close $fh;
2727
2728         } else {
2729                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2730                 foreach my $tag (@$taglist) {
2731                         $ctags->{$tag}++;
2732                 }
2733         }
2734
2735         return $ctags;
2736 }
2737
2738 # return hash, where keys are content tags ('ctags'),
2739 # and values are sum of weights of given tag in every project
2740 sub git_gather_all_ctags {
2741         my $projects = shift;
2742         my $ctags = {};
2743
2744         foreach my $p (@$projects) {
2745                 foreach my $ct (keys %{$p->{'ctags'}}) {
2746                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2747                 }
2748         }
2749
2750         return $ctags;
2751 }
2752
2753 sub git_populate_project_tagcloud {
2754         my $ctags = shift;
2755
2756         # First, merge different-cased tags; tags vote on casing
2757         my %ctags_lc;
2758         foreach (keys %$ctags) {
2759                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2760                 if (not $ctags_lc{lc $_}->{topcount}
2761                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2762                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2763                         $ctags_lc{lc $_}->{topname} = $_;
2764                 }
2765         }
2766
2767         my $cloud;
2768         my $matched = $input_params{'ctag'};
2769         if (eval { require HTML::TagCloud; 1; }) {
2770                 $cloud = HTML::TagCloud->new;
2771                 foreach my $ctag (sort keys %ctags_lc) {
2772                         # Pad the title with spaces so that the cloud looks
2773                         # less crammed.
2774                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2775                         $title =~ s/ /&nbsp;/g;
2776                         $title =~ s/^/&nbsp;/g;
2777                         $title =~ s/$/&nbsp;/g;
2778                         if (defined $matched && $matched eq $ctag) {
2779                                 $title = qq(<span class="match">$title</span>);
2780                         }
2781                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2782                                     $ctags_lc{$ctag}->{count});
2783                 }
2784         } else {
2785                 $cloud = {};
2786                 foreach my $ctag (keys %ctags_lc) {
2787                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2788                         if (defined $matched && $matched eq $ctag) {
2789                                 $title = qq(<span class="match">$title</span>);
2790                         }
2791                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2792                         $cloud->{$ctag}{ctag} =
2793                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2794                 }
2795         }
2796         return $cloud;
2797 }
2798
2799 sub git_show_project_tagcloud {
2800         my ($cloud, $count) = @_;
2801         if (ref $cloud eq 'HTML::TagCloud') {
2802                 return $cloud->html_and_css($count);
2803         } else {
2804                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2805                 return
2806                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2807                         join (', ', map {
2808                                 $cloud->{$_}->{'ctag'}
2809                         } splice(@tags, 0, $count)) .
2810                         '</div>';
2811         }
2812 }
2813
2814 sub git_get_project_url_list {
2815         my $path = shift;
2816
2817         $git_dir = "$projectroot/$path";
2818         open my $fd, '<', "$git_dir/cloneurl"
2819                 or return wantarray ?
2820                 @{ config_to_multi(git_get_project_config('url')) } :
2821                    config_to_multi(git_get_project_config('url'));
2822         my @git_project_url_list = map { chomp; $_ } <$fd>;
2823         close $fd;
2824
2825         return wantarray ? @git_project_url_list : \@git_project_url_list;
2826 }
2827
2828 sub git_get_projects_list {
2829         my $filter = shift || '';
2830         my @list;
2831
2832         $filter =~ s/\.git$//;
2833
2834         if (-d $projects_list) {
2835                 # search in directory
2836                 my $dir = $projects_list;
2837                 # remove the trailing "/"
2838                 $dir =~ s!/+$!!;
2839                 my $pfxlen = length("$dir");
2840                 my $pfxdepth = ($dir =~ tr!/!!);
2841                 # when filtering, search only given subdirectory
2842                 if ($filter) {
2843                         $dir .= "/$filter";
2844                         $dir =~ s!/+$!!;
2845                 }
2846
2847                 File::Find::find({
2848                         follow_fast => 1, # follow symbolic links
2849                         follow_skip => 2, # ignore duplicates
2850                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2851                         wanted => sub {
2852                                 # global variables
2853                                 our $project_maxdepth;
2854                                 our $projectroot;
2855                                 # skip project-list toplevel, if we get it.
2856                                 return if (m!^[/.]$!);
2857                                 # only directories can be git repositories
2858                                 return unless (-d $_);
2859                                 # don't traverse too deep (Find is super slow on os x)
2860                                 # $project_maxdepth excludes depth of $projectroot
2861                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2862                                         $File::Find::prune = 1;
2863                                         return;
2864                                 }
2865
2866                                 my $path = substr($File::Find::name, $pfxlen + 1);
2867                                 # we check related file in $projectroot
2868                                 if (check_export_ok("$projectroot/$path")) {
2869                                         push @list, { path => $path };
2870                                         $File::Find::prune = 1;
2871                                 }
2872                         },
2873                 }, "$dir");
2874
2875         } elsif (-f $projects_list) {
2876                 # read from file(url-encoded):
2877                 # 'git%2Fgit.git Linus+Torvalds'
2878                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2879                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2880                 open my $fd, '<', $projects_list or return;
2881         PROJECT:
2882                 while (my $line = <$fd>) {
2883                         chomp $line;
2884                         my ($path, $owner) = split ' ', $line;
2885                         $path = unescape($path);
2886                         $owner = unescape($owner);
2887                         if (!defined $path) {
2888                                 next;
2889                         }
2890                         # if $filter is rpovided, check if $path begins with $filter
2891                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2892                                 next;
2893                         }
2894                         if (check_export_ok("$projectroot/$path")) {
2895                                 my $pr = {
2896                                         path => $path,
2897                                         owner => to_utf8($owner),
2898                                 };
2899                                 push @list, $pr;
2900                         }
2901                 }
2902                 close $fd;
2903         }
2904         return @list;
2905 }
2906
2907 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2908 # as side effects it sets 'forks' field to list of forks for forked projects
2909 sub filter_forks_from_projects_list {
2910         my $projects = shift;
2911
2912         my %trie; # prefix tree of directories (path components)
2913         # generate trie out of those directories that might contain forks
2914         foreach my $pr (@$projects) {
2915                 my $path = $pr->{'path'};
2916                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2917                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2918                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2919                 next unless (-d "$projectroot/$path"); # containing directory exists
2920                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2921
2922                 # add to trie
2923                 my @dirs = split('/', $path);
2924                 # walk the trie, until either runs out of components or out of trie
2925                 my $ref = \%trie;
2926                 while (scalar @dirs &&
2927                        exists($ref->{$dirs[0]})) {
2928                         $ref = $ref->{shift @dirs};
2929                 }
2930                 # create rest of trie structure from rest of components
2931                 foreach my $dir (@dirs) {
2932                         $ref = $ref->{$dir} = {};
2933                 }
2934                 # create end marker, store $pr as a data
2935                 $ref->{''} = $pr if (!exists $ref->{''});
2936         }
2937
2938         # filter out forks, by finding shortest prefix match for paths
2939         my @filtered;
2940  PROJECT:
2941         foreach my $pr (@$projects) {
2942                 # trie lookup
2943                 my $ref = \%trie;
2944         DIR:
2945                 foreach my $dir (split('/', $pr->{'path'})) {
2946                         if (exists $ref->{''}) {
2947                                 # found [shortest] prefix, is a fork - skip it
2948                                 push @{$ref->{''}{'forks'}}, $pr;
2949                                 next PROJECT;
2950                         }
2951                         if (!exists $ref->{$dir}) {
2952                                 # not in trie, cannot have prefix, not a fork
2953                                 push @filtered, $pr;
2954                                 next PROJECT;
2955                         }
2956                         # If the dir is there, we just walk one step down the trie.
2957                         $ref = $ref->{$dir};
2958                 }
2959                 # we ran out of trie
2960                 # (shouldn't happen: it's either no match, or end marker)
2961                 push @filtered, $pr;
2962         }
2963
2964         return @filtered;
2965 }
2966
2967 # note: fill_project_list_info must be run first,
2968 # for 'descr_long' and 'ctags' to be filled
2969 sub search_projects_list {
2970         my ($projlist, %opts) = @_;
2971         my $tagfilter  = $opts{'tagfilter'};
2972         my $searchtext = $opts{'searchtext'};
2973
2974         return @$projlist
2975                 unless ($tagfilter || $searchtext);
2976
2977         my @projects;
2978  PROJECT:
2979         foreach my $pr (@$projlist) {
2980
2981                 if ($tagfilter) {
2982                         next unless ref($pr->{'ctags'}) eq 'HASH';
2983                         next unless
2984                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2985                 }
2986
2987                 if ($searchtext) {
2988                         next unless
2989                                 $pr->{'path'} =~ /$searchtext/ ||
2990                                 $pr->{'descr_long'} =~ /$searchtext/;
2991                 }
2992
2993                 push @projects, $pr;
2994         }
2995
2996         return @projects;
2997 }
2998
2999 our $gitweb_project_owner = undef;
3000 sub git_get_project_list_from_file {
3001
3002         return if (defined $gitweb_project_owner);
3003
3004         $gitweb_project_owner = {};
3005         # read from file (url-encoded):
3006         # 'git%2Fgit.git Linus+Torvalds'
3007         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3008         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3009         if (-f $projects_list) {
3010                 open(my $fd, '<', $projects_list);
3011                 while (my $line = <$fd>) {
3012                         chomp $line;
3013                         my ($pr, $ow) = split ' ', $line;
3014                         $pr = unescape($pr);
3015                         $ow = unescape($ow);
3016                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3017                 }
3018                 close $fd;
3019         }
3020 }
3021
3022 sub git_get_project_owner {
3023         my $project = shift;
3024         my $owner;
3025
3026         return undef unless $project;
3027         $git_dir = "$projectroot/$project";
3028
3029         if (!defined $gitweb_project_owner) {
3030                 git_get_project_list_from_file();
3031         }
3032
3033         if (exists $gitweb_project_owner->{$project}) {
3034                 $owner = $gitweb_project_owner->{$project};
3035         }
3036         if (!defined $owner){
3037                 $owner = git_get_project_config('owner');
3038         }
3039         if (!defined $owner) {
3040                 $owner = get_file_owner("$git_dir");
3041         }
3042
3043         return $owner;
3044 }
3045
3046 sub git_get_last_activity {
3047         my ($path) = @_;
3048         my $fd;
3049
3050         $git_dir = "$projectroot/$path";
3051         open($fd, "-|", git_cmd(), 'for-each-ref',
3052              '--format=%(committer)',
3053              '--sort=-committerdate',
3054              '--count=1',
3055              'refs/heads') or return;
3056         my $most_recent = <$fd>;
3057         close $fd or return;
3058         if (defined $most_recent &&
3059             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3060                 my $timestamp = $1;
3061                 my $age = time - $timestamp;
3062                 return ($age, age_string($age));
3063         }
3064         return (undef, undef);
3065 }
3066
3067 # Implementation note: when a single remote is wanted, we cannot use 'git
3068 # remote show -n' because that command always work (assuming it's a remote URL
3069 # if it's not defined), and we cannot use 'git remote show' because that would
3070 # try to make a network roundtrip. So the only way to find if that particular
3071 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3072 # and when we find what we want.
3073 sub git_get_remotes_list {
3074         my $wanted = shift;
3075         my %remotes = ();
3076
3077         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3078         return unless $fd;
3079         while (my $remote = <$fd>) {
3080                 chomp $remote;
3081                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3082                 next if $wanted and not $remote eq $wanted;
3083                 my ($url, $key) = ($1, $2);
3084
3085                 $remotes{$remote} ||= { 'heads' => () };
3086                 $remotes{$remote}{$key} = $url;
3087         }
3088         close $fd or return;
3089         return wantarray ? %remotes : \%remotes;
3090 }
3091
3092 # Takes a hash of remotes as first parameter and fills it by adding the
3093 # available remote heads for each of the indicated remotes.
3094 sub fill_remote_heads {
3095         my $remotes = shift;
3096         my @heads = map { "remotes/$_" } keys %$remotes;
3097         my @remoteheads = git_get_heads_list(undef, @heads);
3098         foreach my $remote (keys %$remotes) {
3099                 $remotes->{$remote}{'heads'} = [ grep {
3100                         $_->{'name'} =~ s!^$remote/!!
3101                         } @remoteheads ];
3102         }
3103 }
3104
3105 sub git_get_references {
3106         my $type = shift || "";
3107         my %refs;
3108         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3109         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3110         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3111                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3112                 or return;
3113
3114         while (my $line = <$fd>) {
3115                 chomp $line;
3116                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3117                         if (defined $refs{$1}) {
3118                                 push @{$refs{$1}}, $2;
3119                         } else {
3120                                 $refs{$1} = [ $2 ];
3121                         }
3122                 }
3123         }
3124         close $fd or return;
3125         return \%refs;
3126 }
3127
3128 sub git_get_rev_name_tags {
3129         my $hash = shift || return undef;
3130
3131         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3132                 or return;
3133         my $name_rev = <$fd>;
3134         close $fd;
3135
3136         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3137                 return $1;
3138         } else {
3139                 # catches also '$hash undefined' output
3140                 return undef;
3141         }
3142 }
3143
3144 ## ----------------------------------------------------------------------
3145 ## parse to hash functions
3146
3147 sub parse_date {
3148         my $epoch = shift;
3149         my $tz = shift || "-0000";
3150
3151         my %date;
3152         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3153         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3154         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3155         $date{'hour'} = $hour;
3156         $date{'minute'} = $min;
3157         $date{'mday'} = $mday;
3158         $date{'day'} = $days[$wday];
3159         $date{'month'} = $months[$mon];
3160         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3161                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3162         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3163                              $mday, $months[$mon], $hour ,$min;
3164         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3165                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3166
3167         my ($tz_sign, $tz_hour, $tz_min) =
3168                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3169         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3170         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3171         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3172         $date{'hour_local'} = $hour;
3173         $date{'minute_local'} = $min;
3174         $date{'tz_local'} = $tz;
3175         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3176                                   1900+$year, $mon+1, $mday,
3177                                   $hour, $min, $sec, $tz);
3178         return %date;
3179 }
3180
3181 sub parse_tag {
3182         my $tag_id = shift;
3183         my %tag;
3184         my @comment;
3185
3186         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3187         $tag{'id'} = $tag_id;
3188         while (my $line = <$fd>) {
3189                 chomp $line;
3190                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3191                         $tag{'object'} = $1;
3192                 } elsif ($line =~ m/^type (.+)$/) {
3193                         $tag{'type'} = $1;
3194                 } elsif ($line =~ m/^tag (.+)$/) {
3195                         $tag{'name'} = $1;
3196                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3197                         $tag{'author'} = $1;
3198                         $tag{'author_epoch'} = $2;
3199                         $tag{'author_tz'} = $3;
3200                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3201                                 $tag{'author_name'}  = $1;
3202                                 $tag{'author_email'} = $2;
3203                         } else {
3204                                 $tag{'author_name'} = $tag{'author'};
3205                         }
3206                 } elsif ($line =~ m/--BEGIN/) {
3207                         push @comment, $line;
3208                         last;
3209                 } elsif ($line eq "") {
3210                         last;
3211                 }
3212         }
3213         push @comment, <$fd>;
3214         $tag{'comment'} = \@comment;
3215         close $fd or return;
3216         if (!defined $tag{'name'}) {
3217                 return
3218         };
3219         return %tag
3220 }
3221
3222 sub parse_commit_text {
3223         my ($commit_text, $withparents) = @_;
3224         my @commit_lines = split '\n', $commit_text;
3225         my %co;
3226
3227         pop @commit_lines; # Remove '\0'
3228
3229         if (! @commit_lines) {
3230                 return;
3231         }
3232
3233         my $header = shift @commit_lines;
3234         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3235                 return;
3236         }
3237         ($co{'id'}, my @parents) = split ' ', $header;
3238         while (my $line = shift @commit_lines) {
3239                 last if $line eq "\n";
3240                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3241                         $co{'tree'} = $1;
3242                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3243                         push @parents, $1;
3244                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3245                         $co{'author'} = to_utf8($1);
3246                         $co{'author_epoch'} = $2;
3247                         $co{'author_tz'} = $3;
3248                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3249                                 $co{'author_name'}  = $1;
3250                                 $co{'author_email'} = $2;
3251                         } else {
3252                                 $co{'author_name'} = $co{'author'};
3253                         }
3254                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3255                         $co{'committer'} = to_utf8($1);
3256                         $co{'committer_epoch'} = $2;
3257                         $co{'committer_tz'} = $3;
3258                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3259                                 $co{'committer_name'}  = $1;
3260                                 $co{'committer_email'} = $2;
3261                         } else {
3262                                 $co{'committer_name'} = $co{'committer'};
3263                         }
3264                 }
3265         }
3266         if (!defined $co{'tree'}) {
3267                 return;
3268         };
3269         $co{'parents'} = \@parents;
3270         $co{'parent'} = $parents[0];
3271
3272         foreach my $title (@commit_lines) {
3273                 $title =~ s/^    //;
3274                 if ($title ne "") {
3275                         $co{'title'} = chop_str($title, 80, 5);
3276                         # remove leading stuff of merges to make the interesting part visible
3277                         if (length($title) > 50) {
3278                                 $title =~ s/^Automatic //;
3279                                 $title =~ s/^merge (of|with) /Merge ... /i;
3280                                 if (length($title) > 50) {
3281                                         $title =~ s/(http|rsync):\/\///;
3282                                 }
3283                                 if (length($title) > 50) {
3284                                         $title =~ s/(master|www|rsync)\.//;
3285                                 }
3286                                 if (length($title) > 50) {
3287                                         $title =~ s/kernel.org:?//;
3288                                 }
3289                                 if (length($title) > 50) {
3290                                         $title =~ s/\/pub\/scm//;
3291                                 }
3292                         }
3293                         $co{'title_short'} = chop_str($title, 50, 5);
3294                         last;
3295                 }
3296         }
3297         if (! defined $co{'title'} || $co{'title'} eq "") {
3298                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3299         }
3300         # remove added spaces
3301         foreach my $line (@commit_lines) {
3302                 $line =~ s/^    //;
3303         }
3304         $co{'comment'} = \@commit_lines;
3305
3306         my $age = time - $co{'committer_epoch'};
3307         $co{'age'} = $age;
3308         $co{'age_string'} = age_string($age);
3309         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3310         if ($age > 60*60*24*7*2) {
3311                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3312                 $co{'age_string_age'} = $co{'age_string'};
3313         } else {
3314                 $co{'age_string_date'} = $co{'age_string'};
3315                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3316         }
3317         return %co;
3318 }
3319
3320 sub parse_commit {
3321         my ($commit_id) = @_;
3322         my %co;
3323
3324         local $/ = "\0";
3325
3326         open my $fd, "-|", git_cmd(), "rev-list",
3327                 "--parents",
3328                 "--header",
3329                 "--max-count=1",
3330                 $commit_id,
3331                 "--",
3332                 or die_error(500, "Open git-rev-list failed");
3333         %co = parse_commit_text(<$fd>, 1);
3334         close $fd;
3335
3336         return %co;
3337 }
3338
3339 sub parse_commits {
3340         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3341         my @cos;
3342
3343         $maxcount ||= 1;
3344         $skip ||= 0;
3345
3346         local $/ = "\0";
3347
3348         open my $fd, "-|", git_cmd(), "rev-list",
3349                 "--header",
3350                 @args,
3351                 ("--max-count=" . $maxcount),
3352                 ("--skip=" . $skip),
3353                 @extra_options,
3354                 $commit_id,
3355                 "--",
3356                 ($filename ? ($filename) : ())
3357                 or die_error(500, "Open git-rev-list failed");
3358         while (my $line = <$fd>) {
3359                 my %co = parse_commit_text($line);
3360                 push @cos, \%co;
3361         }
3362         close $fd;
3363
3364         return wantarray ? @cos : \@cos;
3365 }
3366
3367 # parse line of git-diff-tree "raw" output
3368 sub parse_difftree_raw_line {
3369         my $line = shift;
3370         my %res;
3371
3372         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3373         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3374         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3375                 $res{'from_mode'} = $1;
3376                 $res{'to_mode'} = $2;
3377                 $res{'from_id'} = $3;
3378                 $res{'to_id'} = $4;
3379                 $res{'status'} = $5;
3380                 $res{'similarity'} = $6;
3381                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3382                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3383                 } else {
3384                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3385                 }
3386         }
3387         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3388         # combined diff (for merge commit)
3389         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3390                 $res{'nparents'}  = length($1);
3391                 $res{'from_mode'} = [ split(' ', $2) ];
3392                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3393                 $res{'from_id'} = [ split(' ', $3) ];
3394                 $res{'to_id'} = pop @{$res{'from_id'}};
3395                 $res{'status'} = [ split('', $4) ];
3396                 $res{'to_file'} = unquote($5);
3397         }
3398         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3399         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3400                 $res{'commit'} = $1;
3401         }
3402
3403         return wantarray ? %res : \%res;
3404 }
3405
3406 # wrapper: return parsed line of git-diff-tree "raw" output
3407 # (the argument might be raw line, or parsed info)
3408 sub parsed_difftree_line {
3409         my $line_or_ref = shift;
3410
3411         if (ref($line_or_ref) eq "HASH") {
3412                 # pre-parsed (or generated by hand)
3413                 return $line_or_ref;
3414         } else {
3415                 return parse_difftree_raw_line($line_or_ref);
3416         }
3417 }
3418
3419 # parse line of git-ls-tree output
3420 sub parse_ls_tree_line {
3421         my $line = shift;
3422         my %opts = @_;
3423         my %res;
3424
3425         if ($opts{'-l'}) {
3426                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3427                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3428
3429                 $res{'mode'} = $1;
3430                 $res{'type'} = $2;
3431                 $res{'hash'} = $3;
3432                 $res{'size'} = $4;
3433                 if ($opts{'-z'}) {
3434                         $res{'name'} = $5;
3435                 } else {
3436                         $res{'name'} = unquote($5);
3437                 }
3438         } else {
3439                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3440                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3441
3442                 $res{'mode'} = $1;
3443                 $res{'type'} = $2;
3444                 $res{'hash'} = $3;
3445                 if ($opts{'-z'}) {
3446                         $res{'name'} = $4;
3447                 } else {
3448                         $res{'name'} = unquote($4);
3449                 }
3450         }
3451
3452         return wantarray ? %res : \%res;
3453 }
3454
3455 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3456 sub parse_from_to_diffinfo {
3457         my ($diffinfo, $from, $to, @parents) = @_;
3458
3459         if ($diffinfo->{'nparents'}) {
3460                 # combined diff
3461                 $from->{'file'} = [];
3462                 $from->{'href'} = [];
3463                 fill_from_file_info($diffinfo, @parents)
3464                         unless exists $diffinfo->{'from_file'};
3465                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3466                         $from->{'file'}[$i] =
3467                                 defined $diffinfo->{'from_file'}[$i] ?
3468                                         $diffinfo->{'from_file'}[$i] :
3469                                         $diffinfo->{'to_file'};
3470                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3471                                 $from->{'href'}[$i] = href(action=>"blob",
3472                                                            hash_base=>$parents[$i],
3473                                                            hash=>$diffinfo->{'from_id'}[$i],
3474                                                            file_name=>$from->{'file'}[$i]);
3475                         } else {
3476                                 $from->{'href'}[$i] = undef;
3477                         }
3478                 }
3479         } else {
3480                 # ordinary (not combined) diff
3481                 $from->{'file'} = $diffinfo->{'from_file'};
3482                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3483                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3484                                                hash=>$diffinfo->{'from_id'},
3485                                                file_name=>$from->{'file'});
3486                 } else {
3487                         delete $from->{'href'};
3488                 }
3489         }
3490
3491         $to->{'file'} = $diffinfo->{'to_file'};
3492         if (!is_deleted($diffinfo)) { # file exists in result
3493                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3494                                      hash=>$diffinfo->{'to_id'},
3495                                      file_name=>$to->{'file'});
3496         } else {
3497                 delete $to->{'href'};
3498         }
3499 }
3500
3501 ## ......................................................................
3502 ## parse to array of hashes functions
3503
3504 sub git_get_heads_list {
3505         my ($limit, @classes) = @_;
3506         @classes = ('heads') unless @classes;
3507         my @patterns = map { "refs/$_" } @classes;
3508         my @headslist;
3509
3510         open my $fd, '-|', git_cmd(), 'for-each-ref',
3511                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3512                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3513                 @patterns
3514                 or return;
3515         while (my $line = <$fd>) {
3516                 my %ref_item;
3517
3518                 chomp $line;
3519                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3520                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3521                 my ($committer, $epoch, $tz) =
3522                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3523                 $ref_item{'fullname'}  = $name;
3524                 $name =~ s!^refs/(?:head|remote)s/!!;
3525
3526                 $ref_item{'name'}  = $name;
3527                 $ref_item{'id'}    = $hash;
3528                 $ref_item{'title'} = $title || '(no commit message)';
3529                 $ref_item{'epoch'} = $epoch;
3530                 if ($epoch) {
3531                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3532                 } else {
3533                         $ref_item{'age'} = "unknown";
3534                 }
3535
3536                 push @headslist, \%ref_item;
3537         }
3538         close $fd;
3539
3540         return wantarray ? @headslist : \@headslist;
3541 }
3542
3543 sub git_get_tags_list {
3544         my $limit = shift;
3545         my @tagslist;
3546
3547         open my $fd, '-|', git_cmd(), 'for-each-ref',
3548                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3549                 '--format=%(objectname) %(objecttype) %(refname) '.
3550                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3551                 'refs/tags'
3552                 or return;
3553         while (my $line = <$fd>) {
3554                 my %ref_item;
3555
3556                 chomp $line;
3557                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3558                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3559                 my ($creator, $epoch, $tz) =
3560                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3561                 $ref_item{'fullname'} = $name;
3562                 $name =~ s!^refs/tags/!!;
3563
3564                 $ref_item{'type'} = $type;
3565                 $ref_item{'id'} = $id;
3566                 $ref_item{'name'} = $name;
3567                 if ($type eq "tag") {
3568                         $ref_item{'subject'} = $title;
3569                         $ref_item{'reftype'} = $reftype;
3570                         $ref_item{'refid'}   = $refid;
3571                 } else {
3572                         $ref_item{'reftype'} = $type;
3573                         $ref_item{'refid'}   = $id;
3574                 }
3575
3576                 if ($type eq "tag" || $type eq "commit") {
3577                         $ref_item{'epoch'} = $epoch;
3578                         if ($epoch) {
3579                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3580                         } else {
3581                                 $ref_item{'age'} = "unknown";
3582                         }
3583                 }
3584
3585                 push @tagslist, \%ref_item;
3586         }
3587         close $fd;
3588
3589         return wantarray ? @tagslist : \@tagslist;
3590 }
3591
3592 ## ----------------------------------------------------------------------
3593 ## filesystem-related functions
3594
3595 sub get_file_owner {
3596         my $path = shift;
3597
3598         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3599         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3600         if (!defined $gcos) {
3601                 return undef;
3602         }
3603         my $owner = $gcos;
3604         $owner =~ s/[,;].*$//;
3605         return to_utf8($owner);
3606 }
3607
3608 # assume that file exists
3609 sub insert_file {
3610         my $filename = shift;
3611
3612         open my $fd, '<', $filename;
3613         print map { to_utf8($_) } <$fd>;
3614         close $fd;
3615 }
3616
3617 ## ......................................................................
3618 ## mimetype related functions
3619
3620 sub mimetype_guess_file {
3621         my $filename = shift;
3622         my $mimemap = shift;
3623         -r $mimemap or return undef;
3624
3625         my %mimemap;
3626         open(my $mh, '<', $mimemap) or return undef;
3627         while (<$mh>) {
3628                 next if m/^#/; # skip comments
3629                 my ($mimetype, @exts) = split(/\s+/);
3630                 foreach my $ext (@exts) {
3631                         $mimemap{$ext} = $mimetype;
3632                 }
3633         }
3634         close($mh);
3635
3636         $filename =~ /\.([^.]*)$/;
3637         return $mimemap{$1};
3638 }
3639
3640 sub mimetype_guess {
3641         my $filename = shift;
3642         my $mime;
3643         $filename =~ /\./ or return undef;
3644
3645         if ($mimetypes_file) {
3646                 my $file = $mimetypes_file;
3647                 if ($file !~ m!^/!) { # if it is relative path
3648                         # it is relative to project
3649                         $file = "$projectroot/$project/$file";
3650                 }
3651                 $mime = mimetype_guess_file($filename, $file);
3652         }
3653         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3654         return $mime;
3655 }
3656
3657 sub blob_mimetype {
3658         my $fd = shift;
3659         my $filename = shift;
3660
3661         if ($filename) {
3662                 my $mime = mimetype_guess($filename);
3663                 $mime and return $mime;
3664         }
3665
3666         # just in case
3667         return $default_blob_plain_mimetype unless $fd;
3668
3669         if (-T $fd) {
3670                 return 'text/plain';
3671         } elsif (! $filename) {
3672                 return 'application/octet-stream';
3673         } elsif ($filename =~ m/\.png$/i) {
3674                 return 'image/png';
3675         } elsif ($filename =~ m/\.gif$/i) {
3676                 return 'image/gif';
3677         } elsif ($filename =~ m/\.jpe?g$/i) {
3678                 return 'image/jpeg';
3679         } else {
3680                 return 'application/octet-stream';
3681         }
3682 }
3683
3684 sub blob_contenttype {
3685         my ($fd, $file_name, $type) = @_;
3686
3687         $type ||= blob_mimetype($fd, $file_name);
3688         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3689                 $type .= "; charset=$default_text_plain_charset";
3690         }
3691
3692         return $type;
3693 }
3694
3695 # guess file syntax for syntax highlighting; return undef if no highlighting
3696 # the name of syntax can (in the future) depend on syntax highlighter used
3697 sub guess_file_syntax {
3698         my ($highlight, $mimetype, $file_name) = @_;
3699         return undef unless ($highlight && defined $file_name);
3700         my $basename = basename($file_name, '.in');
3701         return $highlight_basename{$basename}
3702                 if exists $highlight_basename{$basename};
3703
3704         $basename =~ /\.([^.]*)$/;
3705         my $ext = $1 or return undef;
3706         return $highlight_ext{$ext}
3707                 if exists $highlight_ext{$ext};
3708
3709         return undef;
3710 }
3711
3712 # run highlighter and return FD of its output,
3713 # or return original FD if no highlighting
3714 sub run_highlighter {
3715         my ($fd, $highlight, $syntax) = @_;
3716         return $fd unless ($highlight && defined $syntax);
3717
3718         close $fd;
3719         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3720                   quote_command($highlight_bin).
3721                   " --replace-tabs=8 --fragment --syntax $syntax |"
3722                 or die_error(500, "Couldn't open file or run syntax highlighter");
3723         return $fd;
3724 }
3725
3726 ## ======================================================================
3727 ## functions printing HTML: header, footer, error page
3728
3729 sub get_page_title {
3730         my $title = to_utf8($site_name);
3731
3732         return $title unless (defined $project);
3733         $title .= " - " . to_utf8($project);
3734
3735         return $title unless (defined $action);
3736         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3737
3738         return $title unless (defined $file_name);
3739         $title .= " - " . esc_path($file_name);
3740         if ($action eq "tree" && $file_name !~ m|/$|) {
3741                 $title .= "/";
3742         }
3743
3744         return $title;
3745 }
3746
3747 sub get_content_type_html {
3748         # require explicit support from the UA if we are to send the page as
3749         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3750         # we have to do this because MSIE sometimes globs '*/*', pretending to
3751         # support xhtml+xml but choking when it gets what it asked for.
3752         if (defined $cgi->http('HTTP_ACCEPT') &&
3753             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3754             $cgi->Accept('application/xhtml+xml') != 0) {
3755                 return 'application/xhtml+xml';
3756         } else {
3757                 return 'text/html';
3758         }
3759 }
3760
3761 sub print_feed_meta {
3762         if (defined $project) {
3763                 my %href_params = get_feed_info();
3764                 if (!exists $href_params{'-title'}) {
3765                         $href_params{'-title'} = 'log';
3766                 }
3767
3768                 foreach my $format (qw(RSS Atom)) {
3769                         my $type = lc($format);
3770                         my %link_attr = (
3771                                 '-rel' => 'alternate',
3772                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3773                                 '-type' => "application/$type+xml"
3774                         );
3775
3776                         $href_params{'action'} = $type;
3777                         $link_attr{'-href'} = href(%href_params);
3778                         print "<link ".
3779                               "rel=\"$link_attr{'-rel'}\" ".
3780                               "title=\"$link_attr{'-title'}\" ".
3781                               "href=\"$link_attr{'-href'}\" ".
3782                               "type=\"$link_attr{'-type'}\" ".
3783                               "/>\n";
3784
3785                         $href_params{'extra_options'} = '--no-merges';
3786                         $link_attr{'-href'} = href(%href_params);
3787                         $link_attr{'-title'} .= ' (no merges)';
3788                         print "<link ".
3789                               "rel=\"$link_attr{'-rel'}\" ".
3790                               "title=\"$link_attr{'-title'}\" ".
3791                               "href=\"$link_attr{'-href'}\" ".
3792                               "type=\"$link_attr{'-type'}\" ".
3793                               "/>\n";
3794                 }
3795
3796         } else {
3797                 printf('<link rel="alternate" title="%s projects list" '.
3798                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3799                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3800                 printf('<link rel="alternate" title="%s projects feeds" '.
3801                        'href="%s" type="text/x-opml" />'."\n",
3802                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3803         }
3804 }
3805
3806 sub print_header_links {
3807         my $status = shift;
3808
3809         # print out each stylesheet that exist, providing backwards capability
3810         # for those people who defined $stylesheet in a config file
3811         if (defined $stylesheet) {
3812                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3813         } else {
3814                 foreach my $stylesheet (@stylesheets) {
3815                         next unless $stylesheet;
3816                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3817                 }
3818         }
3819         print_feed_meta()
3820                 if ($status eq '200 OK');
3821         if (defined $favicon) {
3822                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3823         }
3824 }
3825
3826 sub print_nav_breadcrumbs {
3827         my %opts = @_;
3828
3829         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3830         if (defined $project) {
3831                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3832                 if (defined $action) {
3833                         my $action_print = $action ;
3834                         if (defined $opts{-action_extra}) {
3835                                 $action_print = $cgi->a({-href => href(action=>$action)},
3836                                         $action);
3837                         }
3838                         print " / $action_print";
3839                 }
3840                 if (defined $opts{-action_extra}) {
3841                         print " / $opts{-action_extra}";
3842                 }
3843                 print "\n";
3844         }
3845 }
3846
3847 sub print_search_form {
3848         if (!defined $searchtext) {
3849                 $searchtext = "";
3850         }
3851         my $search_hash;
3852         if (defined $hash_base) {
3853                 $search_hash = $hash_base;
3854         } elsif (defined $hash) {
3855                 $search_hash = $hash;
3856         } else {
3857                 $search_hash = "HEAD";
3858         }
3859         my $action = $my_uri;
3860         my $use_pathinfo = gitweb_check_feature('pathinfo');
3861         if ($use_pathinfo) {
3862                 $action .= "/".esc_url($project);
3863         }
3864         print $cgi->startform(-method => "get", -action => $action) .
3865               "<div class=\"search\">\n" .
3866               (!$use_pathinfo &&
3867               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3868               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3869               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3870               $cgi->popup_menu(-name => 'st', -default => 'commit',
3871                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3872               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3873               " search:\n",
3874               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
3875               "<span title=\"Extended regular expression\">" .
3876               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3877                              -checked => $search_use_regexp) .
3878               "</span>" .
3879               "</div>" .
3880               $cgi->end_form() . "\n";
3881 }
3882
3883 sub git_header_html {
3884         my $status = shift || "200 OK";
3885         my $expires = shift;
3886         my %opts = @_;
3887
3888         my $title = get_page_title();
3889         my $content_type = get_content_type_html();
3890         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3891                            -status=> $status, -expires => $expires)
3892                 unless ($opts{'-no_http_header'});
3893         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3894         print <<EOF;
3895 <?xml version="1.0" encoding="utf-8"?>
3896 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3897 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3898 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3899 <!-- git core binaries version $git_version -->
3900 <head>
3901 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3902 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3903 <meta name="robots" content="index, nofollow"/>
3904 <title>$title</title>
3905 EOF
3906         # the stylesheet, favicon etc urls won't work correctly with path_info
3907         # unless we set the appropriate base URL
3908         if ($ENV{'PATH_INFO'}) {
3909                 print "<base href=\"".esc_url($base_url)."\" />\n";
3910         }
3911         print_header_links($status);
3912
3913         if (defined $site_html_head_string) {
3914                 print to_utf8($site_html_head_string);
3915         }
3916
3917         print "</head>\n" .
3918               "<body>\n";
3919
3920         if (defined $site_header && -f $site_header) {
3921                 insert_file($site_header);
3922         }
3923
3924         print "<div class=\"page_header\">\n";
3925         if (defined $logo) {
3926                 print $cgi->a({-href => esc_url($logo_url),
3927                                -title => $logo_label},
3928                               $cgi->img({-src => esc_url($logo),
3929                                          -width => 72, -height => 27,
3930                                          -alt => "git",
3931                                          -class => "logo"}));
3932         }
3933         print_nav_breadcrumbs(%opts);
3934         print "</div>\n";
3935
3936         my $have_search = gitweb_check_feature('search');
3937         if (defined $project && $have_search) {
3938                 print_search_form();
3939         }
3940 }
3941
3942 sub git_footer_html {
3943         my $feed_class = 'rss_logo';
3944
3945         print "<div class=\"page_footer\">\n";
3946         if (defined $project) {
3947                 my $descr = git_get_project_description($project);
3948                 if (defined $descr) {
3949                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3950                 }
3951
3952                 my %href_params = get_feed_info();
3953                 if (!%href_params) {
3954                         $feed_class .= ' generic';
3955                 }
3956                 $href_params{'-title'} ||= 'log';
3957
3958                 foreach my $format (qw(RSS Atom)) {
3959                         $href_params{'action'} = lc($format);
3960                         print $cgi->a({-href => href(%href_params),
3961                                       -title => "$href_params{'-title'} $format feed",
3962                                       -class => $feed_class}, $format)."\n";
3963                 }
3964
3965         } else {
3966                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3967                               -class => $feed_class}, "OPML") . " ";
3968                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3969                               -class => $feed_class}, "TXT") . "\n";
3970         }
3971         print "</div>\n"; # class="page_footer"
3972
3973         if (defined $t0 && gitweb_check_feature('timed')) {
3974                 print "<div id=\"generating_info\">\n";
3975                 print 'This page took '.
3976                       '<span id="generating_time" class="time_span">'.
3977                       tv_interval($t0, [ gettimeofday() ]).
3978                       ' seconds </span>'.
3979                       ' and '.
3980                       '<span id="generating_cmd">'.
3981                       $number_of_git_cmds.
3982                       '</span> git commands '.
3983                       " to generate.\n";
3984                 print "</div>\n"; # class="page_footer"
3985         }
3986
3987         if (defined $site_footer && -f $site_footer) {
3988                 insert_file($site_footer);
3989         }
3990
3991         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3992         if (defined $action &&
3993             $action eq 'blame_incremental') {
3994                 print qq!<script type="text/javascript">\n!.
3995                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3996                       qq!           "!. href() .qq!");\n!.
3997                       qq!</script>\n!;
3998         } else {
3999                 my ($jstimezone, $tz_cookie, $datetime_class) =
4000                         gitweb_get_feature('javascript-timezone');
4001
4002                 print qq!<script type="text/javascript">\n!.
4003                       qq!window.onload = function () {\n!;
4004                 if (gitweb_check_feature('javascript-actions')) {
4005                         print qq!       fixLinks();\n!;
4006                 }
4007                 if ($jstimezone && $tz_cookie && $datetime_class) {
4008                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4009                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4010                 }
4011                 print qq!};\n!.
4012                       qq!</script>\n!;
4013         }
4014
4015         print "</body>\n" .
4016               "</html>";
4017 }
4018
4019 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4020 # Example: die_error(404, 'Hash not found')
4021 # By convention, use the following status codes (as defined in RFC 2616):
4022 # 400: Invalid or missing CGI parameters, or
4023 #      requested object exists but has wrong type.
4024 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4025 #      this server or project.
4026 # 404: Requested object/revision/project doesn't exist.
4027 # 500: The server isn't configured properly, or
4028 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4029 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4030 # 503: The server is currently unavailable (because it is overloaded,
4031 #      or down for maintenance).  Generally, this is a temporary state.
4032 sub die_error {
4033         my $status = shift || 500;
4034         my $error = esc_html(shift) || "Internal Server Error";
4035         my $extra = shift;
4036         my %opts = @_;
4037
4038         my %http_responses = (
4039                 400 => '400 Bad Request',
4040                 403 => '403 Forbidden',
4041                 404 => '404 Not Found',
4042                 500 => '500 Internal Server Error',
4043                 503 => '503 Service Unavailable',
4044         );
4045         git_header_html($http_responses{$status}, undef, %opts);
4046         print <<EOF;
4047 <div class="page_body">
4048 <br /><br />
4049 $status - $error
4050 <br />
4051 EOF
4052         if (defined $extra) {
4053                 print "<hr />\n" .
4054                       "$extra\n";
4055         }
4056         print "</div>\n";
4057
4058         git_footer_html();
4059         goto DONE_GITWEB
4060                 unless ($opts{'-error_handler'});
4061 }
4062
4063 ## ----------------------------------------------------------------------
4064 ## functions printing or outputting HTML: navigation
4065
4066 sub git_print_page_nav {
4067         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4068         $extra = '' if !defined $extra; # pager or formats
4069
4070         my @navs = qw(summary shortlog log commit commitdiff tree);
4071         if ($suppress) {
4072                 @navs = grep { $_ ne $suppress } @navs;
4073         }
4074
4075         my %arg = map { $_ => {action=>$_} } @navs;
4076         if (defined $head) {
4077                 for (qw(commit commitdiff)) {
4078                         $arg{$_}{'hash'} = $head;
4079                 }
4080                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4081                         for (qw(shortlog log)) {
4082                                 $arg{$_}{'hash'} = $head;
4083                         }
4084                 }
4085         }
4086
4087         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4088         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4089
4090         my @actions = gitweb_get_feature('actions');
4091         my %repl = (
4092                 '%' => '%',
4093                 'n' => $project,         # project name
4094                 'f' => $git_dir,         # project path within filesystem
4095                 'h' => $treehead || '',  # current hash ('h' parameter)
4096                 'b' => $treebase || '',  # hash base ('hb' parameter)
4097         );
4098         while (@actions) {
4099                 my ($label, $link, $pos) = splice(@actions,0,3);
4100                 # insert
4101                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4102                 # munch munch
4103                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4104                 $arg{$label}{'_href'} = $link;
4105         }
4106
4107         print "<div class=\"page_nav\">\n" .
4108                 (join " | ",
4109                  map { $_ eq $current ?
4110                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4111                  } @navs);
4112         print "<br/>\n$extra<br/>\n" .
4113               "</div>\n";
4114 }
4115
4116 # returns a submenu for the nagivation of the refs views (tags, heads,
4117 # remotes) with the current view disabled and the remotes view only
4118 # available if the feature is enabled
4119 sub format_ref_views {
4120         my ($current) = @_;
4121         my @ref_views = qw{tags heads};
4122         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4123         return join " | ", map {
4124                 $_ eq $current ? $_ :
4125                 $cgi->a({-href => href(action=>$_)}, $_)
4126         } @ref_views
4127 }
4128
4129 sub format_paging_nav {
4130         my ($action, $page, $has_next_link) = @_;
4131         my $paging_nav;
4132
4133
4134         if ($page > 0) {
4135                 $paging_nav .=
4136                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4137                         " &sdot; " .
4138                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4139                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4140         } else {
4141                 $paging_nav .= "first &sdot; prev";
4142         }
4143
4144         if ($has_next_link) {
4145                 $paging_nav .= " &sdot; " .
4146                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4147                                  -accesskey => "n", -title => "Alt-n"}, "next");
4148         } else {
4149                 $paging_nav .= " &sdot; next";
4150         }
4151
4152         return $paging_nav;
4153 }
4154
4155 ## ......................................................................
4156 ## functions printing or outputting HTML: div
4157
4158 sub git_print_header_div {
4159         my ($action, $title, $hash, $hash_base) = @_;
4160         my %args = ();
4161
4162         $args{'action'} = $action;
4163         $args{'hash'} = $hash if $hash;
4164         $args{'hash_base'} = $hash_base if $hash_base;
4165
4166         print "<div class=\"header\">\n" .
4167               $cgi->a({-href => href(%args), -class => "title"},
4168               $title ? $title : $action) .
4169               "\n</div>\n";
4170 }
4171
4172 sub format_repo_url {
4173         my ($name, $url) = @_;
4174         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4175 }
4176
4177 # Group output by placing it in a DIV element and adding a header.
4178 # Options for start_div() can be provided by passing a hash reference as the
4179 # first parameter to the function.
4180 # Options to git_print_header_div() can be provided by passing an array
4181 # reference. This must follow the options to start_div if they are present.
4182 # The content can be a scalar, which is output as-is, a scalar reference, which
4183 # is output after html escaping, an IO handle passed either as *handle or
4184 # *handle{IO}, or a function reference. In the latter case all following
4185 # parameters will be taken as argument to the content function call.
4186 sub git_print_section {
4187         my ($div_args, $header_args, $content);
4188         my $arg = shift;
4189         if (ref($arg) eq 'HASH') {
4190                 $div_args = $arg;
4191                 $arg = shift;
4192         }
4193         if (ref($arg) eq 'ARRAY') {
4194                 $header_args = $arg;
4195                 $arg = shift;
4196         }
4197         $content = $arg;
4198
4199         print $cgi->start_div($div_args);
4200         git_print_header_div(@$header_args);
4201
4202         if (ref($content) eq 'CODE') {
4203                 $content->(@_);
4204         } elsif (ref($content) eq 'SCALAR') {
4205                 print esc_html($$content);
4206         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4207                 print <$content>;
4208         } elsif (!ref($content) && defined($content)) {
4209                 print $content;
4210         }
4211
4212         print $cgi->end_div;
4213 }
4214
4215 sub format_timestamp_html {
4216         my $date = shift;
4217         my $strtime = $date->{'rfc2822'};
4218
4219         my (undef, undef, $datetime_class) =
4220                 gitweb_get_feature('javascript-timezone');
4221         if ($datetime_class) {
4222                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4223         }
4224
4225         my $localtime_format = '(%02d:%02d %s)';
4226         if ($date->{'hour_local'} < 6) {
4227                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4228         }
4229         $strtime .= ' ' .
4230                     sprintf($localtime_format,
4231                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4232
4233         return $strtime;
4234 }
4235
4236 # Outputs the author name and date in long form
4237 sub git_print_authorship {
4238         my $co = shift;
4239         my %opts = @_;
4240         my $tag = $opts{-tag} || 'div';
4241         my $author = $co->{'author_name'};
4242
4243         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4244         print "<$tag class=\"author_date\">" .
4245               format_search_author($author, "author", esc_html($author)) .
4246               " [".format_timestamp_html(\%ad)."]".
4247               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4248               "</$tag>\n";
4249 }
4250
4251 # Outputs table rows containing the full author or committer information,
4252 # in the format expected for 'commit' view (& similar).
4253 # Parameters are a commit hash reference, followed by the list of people
4254 # to output information for. If the list is empty it defaults to both
4255 # author and committer.
4256 sub git_print_authorship_rows {
4257         my $co = shift;
4258         # too bad we can't use @people = @_ || ('author', 'committer')
4259         my @people = @_;
4260         @people = ('author', 'committer') unless @people;
4261         foreach my $who (@people) {
4262                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4263                 print "<tr><td>$who</td><td>" .
4264                       format_search_author($co->{"${who}_name"}, $who,
4265                                            esc_html($co->{"${who}_name"})) . " " .
4266                       format_search_author($co->{"${who}_email"}, $who,
4267                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4268                       "</td><td rowspan=\"2\">" .
4269                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4270                       "</td></tr>\n" .
4271                       "<tr>" .
4272                       "<td></td><td>" .
4273                       format_timestamp_html(\%wd) .
4274                       "</td>" .
4275                       "</tr>\n";
4276         }
4277 }
4278
4279 sub git_print_page_path {
4280         my $name = shift;
4281         my $type = shift;
4282         my $hb = shift;
4283
4284
4285         print "<div class=\"page_path\">";
4286         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4287                       -title => 'tree root'}, to_utf8("[$project]"));
4288         print " / ";
4289         if (defined $name) {
4290                 my @dirname = split '/', $name;
4291                 my $basename = pop @dirname;
4292                 my $fullname = '';
4293
4294                 foreach my $dir (@dirname) {
4295                         $fullname .= ($fullname ? '/' : '') . $dir;
4296                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4297                                                      hash_base=>$hb),
4298                                       -title => $fullname}, esc_path($dir));
4299                         print " / ";
4300                 }
4301                 if (defined $type && $type eq 'blob') {
4302                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4303                                                      hash_base=>$hb),
4304                                       -title => $name}, esc_path($basename));
4305                 } elsif (defined $type && $type eq 'tree') {
4306                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4307                                                      hash_base=>$hb),
4308                                       -title => $name}, esc_path($basename));
4309                         print " / ";
4310                 } else {
4311                         print esc_path($basename);
4312                 }
4313         }
4314         print "<br/></div>\n";
4315 }
4316
4317 sub git_print_log {
4318         my $log = shift;
4319         my %opts = @_;
4320
4321         if ($opts{'-remove_title'}) {
4322                 # remove title, i.e. first line of log
4323                 shift @$log;
4324         }
4325         # remove leading empty lines
4326         while (defined $log->[0] && $log->[0] eq "") {
4327                 shift @$log;
4328         }
4329
4330         # print log
4331         my $signoff = 0;
4332         my $empty = 0;
4333         foreach my $line (@$log) {
4334                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4335                         $signoff = 1;
4336                         $empty = 0;
4337                         if (! $opts{'-remove_signoff'}) {
4338                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4339                                 next;
4340                         } else {
4341                                 # remove signoff lines
4342                                 next;
4343                         }
4344                 } else {
4345                         $signoff = 0;
4346                 }
4347
4348                 # print only one empty line
4349                 # do not print empty line after signoff
4350                 if ($line eq "") {
4351                         next if ($empty || $signoff);
4352                         $empty = 1;
4353                 } else {
4354                         $empty = 0;
4355                 }
4356
4357                 print format_log_line_html($line) . "<br/>\n";
4358         }
4359
4360         if ($opts{'-final_empty_line'}) {
4361                 # end with single empty line
4362                 print "<br/>\n" unless $empty;
4363         }
4364 }
4365
4366 # return link target (what link points to)
4367 sub git_get_link_target {
4368         my $hash = shift;
4369         my $link_target;
4370
4371         # read link
4372         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4373                 or return;
4374         {
4375                 local $/ = undef;
4376                 $link_target = <$fd>;
4377         }
4378         close $fd
4379                 or return;
4380
4381         return $link_target;
4382 }
4383
4384 # given link target, and the directory (basedir) the link is in,
4385 # return target of link relative to top directory (top tree);
4386 # return undef if it is not possible (including absolute links).
4387 sub normalize_link_target {
4388         my ($link_target, $basedir) = @_;
4389
4390         # absolute symlinks (beginning with '/') cannot be normalized
4391         return if (substr($link_target, 0, 1) eq '/');
4392
4393         # normalize link target to path from top (root) tree (dir)
4394         my $path;
4395         if ($basedir) {
4396                 $path = $basedir . '/' . $link_target;
4397         } else {
4398                 # we are in top (root) tree (dir)
4399                 $path = $link_target;
4400         }
4401
4402         # remove //, /./, and /../
4403         my @path_parts;
4404         foreach my $part (split('/', $path)) {
4405                 # discard '.' and ''
4406                 next if (!$part || $part eq '.');
4407                 # handle '..'
4408                 if ($part eq '..') {
4409                         if (@path_parts) {
4410                                 pop @path_parts;
4411                         } else {
4412                                 # link leads outside repository (outside top dir)
4413                                 return;
4414                         }
4415                 } else {
4416                         push @path_parts, $part;
4417                 }
4418         }
4419         $path = join('/', @path_parts);
4420
4421         return $path;
4422 }
4423
4424 # print tree entry (row of git_tree), but without encompassing <tr> element
4425 sub git_print_tree_entry {
4426         my ($t, $basedir, $hash_base, $have_blame) = @_;
4427
4428         my %base_key = ();
4429         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4430
4431         # The format of a table row is: mode list link.  Where mode is
4432         # the mode of the entry, list is the name of the entry, an href,
4433         # and link is the action links of the entry.
4434
4435         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4436         if (exists $t->{'size'}) {
4437                 print "<td class=\"size\">$t->{'size'}</td>\n";
4438         }
4439         if ($t->{'type'} eq "blob") {
4440                 print "<td class=\"list\">" .
4441                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4442                                                file_name=>"$basedir$t->{'name'}", %base_key),
4443                                 -class => "list"}, esc_path($t->{'name'}));
4444                 if (S_ISLNK(oct $t->{'mode'})) {
4445                         my $link_target = git_get_link_target($t->{'hash'});
4446                         if ($link_target) {
4447                                 my $norm_target = normalize_link_target($link_target, $basedir);
4448                                 if (defined $norm_target) {
4449                                         print " -> " .
4450                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4451                                                                      file_name=>$norm_target),
4452                                                        -title => $norm_target}, esc_path($link_target));
4453                                 } else {
4454                                         print " -> " . esc_path($link_target);
4455                                 }
4456                         }
4457                 }
4458                 print "</td>\n";
4459                 print "<td class=\"link\">";
4460                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4461                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4462                               "blob");
4463                 if ($have_blame) {
4464                         print " | " .
4465                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4466                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4467                                       "blame");
4468                 }
4469                 if (defined $hash_base) {
4470                         print " | " .
4471                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4472                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4473                                       "history");
4474                 }
4475                 print " | " .
4476                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4477                                                file_name=>"$basedir$t->{'name'}")},
4478                                 "raw");
4479                 print "</td>\n";
4480
4481         } elsif ($t->{'type'} eq "tree") {
4482                 print "<td class=\"list\">";
4483                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4484                                              file_name=>"$basedir$t->{'name'}",
4485                                              %base_key)},
4486                               esc_path($t->{'name'}));
4487                 print "</td>\n";
4488                 print "<td class=\"link\">";
4489                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4490                                              file_name=>"$basedir$t->{'name'}",
4491                                              %base_key)},
4492                               "tree");
4493                 if (defined $hash_base) {
4494                         print " | " .
4495                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4496                                                      file_name=>"$basedir$t->{'name'}")},
4497                                       "history");
4498                 }
4499                 print "</td>\n";
4500         } else {
4501                 # unknown object: we can only present history for it
4502                 # (this includes 'commit' object, i.e. submodule support)
4503                 print "<td class=\"list\">" .
4504                       esc_path($t->{'name'}) .
4505                       "</td>\n";
4506                 print "<td class=\"link\">";
4507                 if (defined $hash_base) {
4508                         print $cgi->a({-href => href(action=>"history",
4509                                                      hash_base=>$hash_base,
4510                                                      file_name=>"$basedir$t->{'name'}")},
4511                                       "history");
4512                 }
4513                 print "</td>\n";
4514         }
4515 }
4516
4517 ## ......................................................................
4518 ## functions printing large fragments of HTML
4519
4520 # get pre-image filenames for merge (combined) diff
4521 sub fill_from_file_info {
4522         my ($diff, @parents) = @_;
4523
4524         $diff->{'from_file'} = [ ];
4525         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4526         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4527                 if ($diff->{'status'}[$i] eq 'R' ||
4528                     $diff->{'status'}[$i] eq 'C') {
4529                         $diff->{'from_file'}[$i] =
4530                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4531                 }
4532         }
4533
4534         return $diff;
4535 }
4536
4537 # is current raw difftree line of file deletion
4538 sub is_deleted {
4539         my $diffinfo = shift;
4540
4541         return $diffinfo->{'to_id'} eq ('0' x 40);
4542 }
4543
4544 # does patch correspond to [previous] difftree raw line
4545 # $diffinfo  - hashref of parsed raw diff format
4546 # $patchinfo - hashref of parsed patch diff format
4547 #              (the same keys as in $diffinfo)
4548 sub is_patch_split {
4549         my ($diffinfo, $patchinfo) = @_;
4550
4551         return defined $diffinfo && defined $patchinfo
4552                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4553 }
4554
4555
4556 sub git_difftree_body {
4557         my ($difftree, $hash, @parents) = @_;
4558         my ($parent) = $parents[0];
4559         my $have_blame = gitweb_check_feature('blame');
4560         print "<div class=\"list_head\">\n";
4561         if ($#{$difftree} > 10) {
4562                 print(($#{$difftree} + 1) . " files changed:\n");
4563         }
4564         print "</div>\n";
4565
4566         print "<table class=\"" .
4567               (@parents > 1 ? "combined " : "") .
4568               "diff_tree\">\n";
4569
4570         # header only for combined diff in 'commitdiff' view
4571         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4572         if ($has_header) {
4573                 # table header
4574                 print "<thead><tr>\n" .
4575                        "<th></th><th></th>\n"; # filename, patchN link
4576                 for (my $i = 0; $i < @parents; $i++) {
4577                         my $par = $parents[$i];
4578                         print "<th>" .
4579                               $cgi->a({-href => href(action=>"commitdiff",
4580                                                      hash=>$hash, hash_parent=>$par),
4581                                        -title => 'commitdiff to parent number ' .
4582                                                   ($i+1) . ': ' . substr($par,0,7)},
4583                                       $i+1) .
4584                               "&nbsp;</th>\n";
4585                 }
4586                 print "</tr></thead>\n<tbody>\n";
4587         }
4588
4589         my $alternate = 1;
4590         my $patchno = 0;
4591         foreach my $line (@{$difftree}) {
4592                 my $diff = parsed_difftree_line($line);
4593
4594                 if ($alternate) {
4595                         print "<tr class=\"dark\">\n";
4596                 } else {
4597                         print "<tr class=\"light\">\n";
4598                 }
4599                 $alternate ^= 1;
4600
4601                 if (exists $diff->{'nparents'}) { # combined diff
4602
4603                         fill_from_file_info($diff, @parents)
4604                                 unless exists $diff->{'from_file'};
4605
4606                         if (!is_deleted($diff)) {
4607                                 # file exists in the result (child) commit
4608                                 print "<td>" .
4609                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4610                                                              file_name=>$diff->{'to_file'},
4611                                                              hash_base=>$hash),
4612                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4613                                       "</td>\n";
4614                         } else {
4615                                 print "<td>" .
4616                                       esc_path($diff->{'to_file'}) .
4617                                       "</td>\n";
4618                         }
4619
4620                         if ($action eq 'commitdiff') {
4621                                 # link to patch
4622                                 $patchno++;
4623                                 print "<td class=\"link\">" .
4624                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4625                                               "patch") .
4626                                       " | " .
4627                                       "</td>\n";
4628                         }
4629
4630                         my $has_history = 0;
4631                         my $not_deleted = 0;
4632                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4633                                 my $hash_parent = $parents[$i];
4634                                 my $from_hash = $diff->{'from_id'}[$i];
4635                                 my $from_path = $diff->{'from_file'}[$i];
4636                                 my $status = $diff->{'status'}[$i];
4637
4638                                 $has_history ||= ($status ne 'A');
4639                                 $not_deleted ||= ($status ne 'D');
4640
4641                                 if ($status eq 'A') {
4642                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4643                                 } elsif ($status eq 'D') {
4644                                         print "<td class=\"link\">" .
4645                                               $cgi->a({-href => href(action=>"blob",
4646                                                                      hash_base=>$hash,
4647                                                                      hash=>$from_hash,
4648                                                                      file_name=>$from_path)},
4649                                                       "blob" . ($i+1)) .
4650                                               " | </td>\n";
4651                                 } else {
4652                                         if ($diff->{'to_id'} eq $from_hash) {
4653                                                 print "<td class=\"link nochange\">";
4654                                         } else {
4655                                                 print "<td class=\"link\">";
4656                                         }
4657                                         print $cgi->a({-href => href(action=>"blobdiff",
4658                                                                      hash=>$diff->{'to_id'},
4659                                                                      hash_parent=>$from_hash,
4660                                                                      hash_base=>$hash,
4661                                                                      hash_parent_base=>$hash_parent,
4662                                                                      file_name=>$diff->{'to_file'},
4663                                                                      file_parent=>$from_path)},
4664                                                       "diff" . ($i+1)) .
4665                                               " | </td>\n";
4666                                 }
4667                         }
4668
4669                         print "<td class=\"link\">";
4670                         if ($not_deleted) {
4671                                 print $cgi->a({-href => href(action=>"blob",
4672                                                              hash=>$diff->{'to_id'},
4673                                                              file_name=>$diff->{'to_file'},
4674                                                              hash_base=>$hash)},
4675                                               "blob");
4676                                 print " | " if ($has_history);
4677                         }
4678                         if ($has_history) {
4679                                 print $cgi->a({-href => href(action=>"history",
4680                                                              file_name=>$diff->{'to_file'},
4681                                                              hash_base=>$hash)},
4682                                               "history");
4683                         }
4684                         print "</td>\n";
4685
4686                         print "</tr>\n";
4687                         next; # instead of 'else' clause, to avoid extra indent
4688                 }
4689                 # else ordinary diff
4690
4691                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4692                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4693                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4694                         $to_mode_oct = oct $diff->{'to_mode'};
4695                         if (S_ISREG($to_mode_oct)) { # only for regular file
4696                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4697                         }
4698                         $to_file_type = file_type($diff->{'to_mode'});
4699                 }
4700                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4701                         $from_mode_oct = oct $diff->{'from_mode'};
4702                         if (S_ISREG($from_mode_oct)) { # only for regular file
4703                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4704                         }
4705                         $from_file_type = file_type($diff->{'from_mode'});
4706                 }
4707
4708                 if ($diff->{'status'} eq "A") { # created
4709                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4710                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4711                         $mode_chng   .= "]</span>";
4712                         print "<td>";
4713                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4714                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4715                                       -class => "list"}, esc_path($diff->{'file'}));
4716                         print "</td>\n";
4717                         print "<td>$mode_chng</td>\n";
4718                         print "<td class=\"link\">";
4719                         if ($action eq 'commitdiff') {
4720                                 # link to patch
4721                                 $patchno++;
4722                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4723                                               "patch") .
4724                                       " | ";
4725                         }
4726                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4727                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4728                                       "blob");
4729                         print "</td>\n";
4730
4731                 } elsif ($diff->{'status'} eq "D") { # deleted
4732                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4733                         print "<td>";
4734                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4735                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4736                                        -class => "list"}, esc_path($diff->{'file'}));
4737                         print "</td>\n";
4738                         print "<td>$mode_chng</td>\n";
4739                         print "<td class=\"link\">";
4740                         if ($action eq 'commitdiff') {
4741                                 # link to patch
4742                                 $patchno++;
4743                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4744                                               "patch") .
4745                                       " | ";
4746                         }
4747                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4748                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4749                                       "blob") . " | ";
4750                         if ($have_blame) {
4751                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4752                                                              file_name=>$diff->{'file'})},
4753                                               "blame") . " | ";
4754                         }
4755                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4756                                                      file_name=>$diff->{'file'})},
4757                                       "history");
4758                         print "</td>\n";
4759
4760                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4761                         my $mode_chnge = "";
4762                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4763                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4764                                 if ($from_file_type ne $to_file_type) {
4765                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4766                                 }
4767                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4768                                         if ($from_mode_str && $to_mode_str) {
4769                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4770                                         } elsif ($to_mode_str) {
4771                                                 $mode_chnge .= " mode: $to_mode_str";
4772                                         }
4773                                 }
4774                                 $mode_chnge .= "]</span>\n";
4775                         }
4776                         print "<td>";
4777                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4778                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4779                                       -class => "list"}, esc_path($diff->{'file'}));
4780                         print "</td>\n";
4781                         print "<td>$mode_chnge</td>\n";
4782                         print "<td class=\"link\">";
4783                         if ($action eq 'commitdiff') {
4784                                 # link to patch
4785                                 $patchno++;
4786                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4787                                               "patch") .
4788                                       " | ";
4789                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4790                                 # "commit" view and modified file (not onlu mode changed)
4791                                 print $cgi->a({-href => href(action=>"blobdiff",
4792                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4793                                                              hash_base=>$hash, hash_parent_base=>$parent,
4794                                                              file_name=>$diff->{'file'})},
4795                                               "diff") .
4796                                       " | ";
4797                         }
4798                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4799                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4800                                        "blob") . " | ";
4801                         if ($have_blame) {
4802                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4803                                                              file_name=>$diff->{'file'})},
4804                                               "blame") . " | ";
4805                         }
4806                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4807                                                      file_name=>$diff->{'file'})},
4808                                       "history");
4809                         print "</td>\n";
4810
4811                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4812                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4813                         my $nstatus = $status_name{$diff->{'status'}};
4814                         my $mode_chng = "";
4815                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4816                                 # mode also for directories, so we cannot use $to_mode_str
4817                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4818                         }
4819                         print "<td>" .
4820                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4821                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4822                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4823                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4824                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4825                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4826                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4827                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4828                               "<td class=\"link\">";
4829                         if ($action eq 'commitdiff') {
4830                                 # link to patch
4831                                 $patchno++;
4832                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4833                                               "patch") .
4834                                       " | ";
4835                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4836                                 # "commit" view and modified file (not only pure rename or copy)
4837                                 print $cgi->a({-href => href(action=>"blobdiff",
4838                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4839                                                              hash_base=>$hash, hash_parent_base=>$parent,
4840                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4841                                               "diff") .
4842                                       " | ";
4843                         }
4844                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4845                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4846                                       "blob") . " | ";
4847                         if ($have_blame) {
4848                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4849                                                              file_name=>$diff->{'to_file'})},
4850                                               "blame") . " | ";
4851                         }
4852                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4853                                                     file_name=>$diff->{'to_file'})},
4854                                       "history");
4855                         print "</td>\n";
4856
4857                 } # we should not encounter Unmerged (U) or Unknown (X) status
4858                 print "</tr>\n";
4859         }
4860         print "</tbody>" if $has_header;
4861         print "</table>\n";
4862 }
4863
4864 sub print_sidebyside_diff_chunk {
4865         my @chunk = @_;
4866         my (@ctx, @rem, @add);
4867
4868         return unless @chunk;
4869
4870         # incomplete last line might be among removed or added lines,
4871         # or both, or among context lines: find which
4872         for (my $i = 1; $i < @chunk; $i++) {
4873                 if ($chunk[$i][0] eq 'incomplete') {
4874                         $chunk[$i][0] = $chunk[$i-1][0];
4875                 }
4876         }
4877
4878         # guardian
4879         push @chunk, ["", ""];
4880
4881         foreach my $line_info (@chunk) {
4882                 my ($class, $line) = @$line_info;
4883
4884                 # print chunk headers
4885                 if ($class && $class eq 'chunk_header') {
4886                         print $line;
4887                         next;
4888                 }
4889
4890                 ## print from accumulator when type of class of lines change
4891                 # empty contents block on start rem/add block, or end of chunk
4892                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4893                         print join '',
4894                                 '<div class="chunk_block ctx">',
4895                                         '<div class="old">',
4896                                         @ctx,
4897                                         '</div>',
4898                                         '<div class="new">',
4899                                         @ctx,
4900                                         '</div>',
4901                                 '</div>';
4902                         @ctx = ();
4903                 }
4904                 # empty add/rem block on start context block, or end of chunk
4905                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4906                         if (!@add) {
4907                                 # pure removal
4908                                 print join '',
4909                                         '<div class="chunk_block rem">',
4910                                                 '<div class="old">',
4911                                                 @rem,
4912                                                 '</div>',
4913                                         '</div>';
4914                         } elsif (!@rem) {
4915                                 # pure addition
4916                                 print join '',
4917                                         '<div class="chunk_block add">',
4918                                                 '<div class="new">',
4919                                                 @add,
4920                                                 '</div>',
4921                                         '</div>';
4922                         } else {
4923                                 # assume that it is change
4924                                 print join '',
4925                                         '<div class="chunk_block chg">',
4926                                                 '<div class="old">',
4927                                                 @rem,
4928                                                 '</div>',
4929                                                 '<div class="new">',
4930                                                 @add,
4931                                                 '</div>',
4932                                         '</div>';
4933                         }
4934                         @rem = @add = ();
4935                 }
4936
4937                 ## adding lines to accumulator
4938                 # guardian value
4939                 last unless $line;
4940                 # rem, add or change
4941                 if ($class eq 'rem') {
4942                         push @rem, $line;
4943                 } elsif ($class eq 'add') {
4944                         push @add, $line;
4945                 }
4946                 # context line
4947                 if ($class eq 'ctx') {
4948                         push @ctx, $line;
4949                 }
4950         }
4951 }
4952
4953 sub git_patchset_body {
4954         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4955         my ($hash_parent) = $hash_parents[0];
4956
4957         my $is_combined = (@hash_parents > 1);
4958         my $patch_idx = 0;
4959         my $patch_number = 0;
4960         my $patch_line;
4961         my $diffinfo;
4962         my $to_name;
4963         my (%from, %to);
4964         my @chunk; # for side-by-side diff
4965
4966         print "<div class=\"patchset\">\n";
4967
4968         # skip to first patch
4969         while ($patch_line = <$fd>) {
4970                 chomp $patch_line;
4971
4972                 last if ($patch_line =~ m/^diff /);
4973         }
4974
4975  PATCH:
4976         while ($patch_line) {
4977
4978                 # parse "git diff" header line
4979                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4980                         # $1 is from_name, which we do not use
4981                         $to_name = unquote($2);
4982                         $to_name =~ s!^b/!!;
4983                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4984                         # $1 is 'cc' or 'combined', which we do not use
4985                         $to_name = unquote($2);
4986                 } else {
4987                         $to_name = undef;
4988                 }
4989
4990                 # check if current patch belong to current raw line
4991                 # and parse raw git-diff line if needed
4992                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4993                         # this is continuation of a split patch
4994                         print "<div class=\"patch cont\">\n";
4995                 } else {
4996                         # advance raw git-diff output if needed
4997                         $patch_idx++ if defined $diffinfo;
4998
4999                         # read and prepare patch information
5000                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5001
5002                         # compact combined diff output can have some patches skipped
5003                         # find which patch (using pathname of result) we are at now;
5004                         if ($is_combined) {
5005                                 while ($to_name ne $diffinfo->{'to_file'}) {
5006                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5007                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5008                                               "</div>\n";  # class="patch"
5009
5010                                         $patch_idx++;
5011                                         $patch_number++;
5012
5013                                         last if $patch_idx > $#$difftree;
5014                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5015                                 }
5016                         }
5017
5018                         # modifies %from, %to hashes
5019                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5020
5021                         # this is first patch for raw difftree line with $patch_idx index
5022                         # we index @$difftree array from 0, but number patches from 1
5023                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5024                 }
5025
5026                 # git diff header
5027                 #assert($patch_line =~ m/^diff /) if DEBUG;
5028                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5029                 $patch_number++;
5030                 # print "git diff" header
5031                 print format_git_diff_header_line($patch_line, $diffinfo,
5032                                                   \%from, \%to);
5033
5034                 # print extended diff header
5035                 print "<div class=\"diff extended_header\">\n";
5036         EXTENDED_HEADER:
5037                 while ($patch_line = <$fd>) {
5038                         chomp $patch_line;
5039
5040                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5041
5042                         print format_extended_diff_header_line($patch_line, $diffinfo,
5043                                                                \%from, \%to);
5044                 }
5045                 print "</div>\n"; # class="diff extended_header"
5046
5047                 # from-file/to-file diff header
5048                 if (! $patch_line) {
5049                         print "</div>\n"; # class="patch"
5050                         last PATCH;
5051                 }
5052                 next PATCH if ($patch_line =~ m/^diff /);
5053                 #assert($patch_line =~ m/^---/) if DEBUG;
5054
5055                 my $last_patch_line = $patch_line;
5056                 $patch_line = <$fd>;
5057                 chomp $patch_line;
5058                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5059
5060                 print format_diff_from_to_header($last_patch_line, $patch_line,
5061                                                  $diffinfo, \%from, \%to,
5062                                                  @hash_parents);
5063
5064                 # the patch itself
5065         LINE:
5066                 while ($patch_line = <$fd>) {
5067                         chomp $patch_line;
5068
5069                         next PATCH if ($patch_line =~ m/^diff /);
5070
5071                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5072                         my $diff_classes = "diff";
5073                         $diff_classes .= " $class" if ($class);
5074                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5075
5076                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5077                                 if ($class eq 'chunk_header') {
5078                                         print_sidebyside_diff_chunk(@chunk);
5079                                         @chunk = ( [ $class, $line ] );
5080                                 } else {
5081                                         push @chunk, [ $class, $line ];
5082                                 }
5083                         } else {
5084                                 # default 'inline' style and unknown styles
5085                                 print $line;
5086                         }
5087                 }
5088
5089         } continue {
5090                 if (@chunk) {
5091                         print_sidebyside_diff_chunk(@chunk);
5092                         @chunk = ();
5093                 }
5094                 print "</div>\n"; # class="patch"
5095         }
5096
5097         # for compact combined (--cc) format, with chunk and patch simplification
5098         # the patchset might be empty, but there might be unprocessed raw lines
5099         for (++$patch_idx if $patch_number > 0;
5100              $patch_idx < @$difftree;
5101              ++$patch_idx) {
5102                 # read and prepare patch information
5103                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5104
5105                 # generate anchor for "patch" links in difftree / whatchanged part
5106                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5107                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5108                       "</div>\n";  # class="patch"
5109
5110                 $patch_number++;
5111         }
5112
5113         if ($patch_number == 0) {
5114                 if (@hash_parents > 1) {
5115                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5116                 } else {
5117                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5118                 }
5119         }
5120
5121         print "</div>\n"; # class="patchset"
5122 }
5123
5124 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5125
5126 # fills project list info (age, description, owner, category, forks)
5127 # for each project in the list, removing invalid projects from
5128 # returned list
5129 # NOTE: modifies $projlist, but does not remove entries from it
5130 sub fill_project_list_info {
5131         my $projlist = shift;
5132         my @projects;
5133
5134         my $show_ctags = gitweb_check_feature('ctags');
5135  PROJECT:
5136         foreach my $pr (@$projlist) {
5137                 my (@activity) = git_get_last_activity($pr->{'path'});
5138                 unless (@activity) {
5139                         next PROJECT;
5140                 }
5141                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5142                 if (!defined $pr->{'descr'}) {
5143                         my $descr = git_get_project_description($pr->{'path'}) || "";
5144                         $descr = to_utf8($descr);
5145                         $pr->{'descr_long'} = $descr;
5146                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5147                 }
5148                 if (!defined $pr->{'owner'}) {
5149                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5150                 }
5151                 if ($show_ctags) {
5152                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5153                 }
5154                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5155                         my $cat = git_get_project_category($pr->{'path'}) ||
5156                                                            $project_list_default_category;
5157                         $pr->{'category'} = to_utf8($cat);
5158                 }
5159
5160                 push @projects, $pr;
5161         }
5162
5163         return @projects;
5164 }
5165
5166 sub sort_projects_list {
5167         my ($projlist, $order) = @_;
5168         my @projects;
5169
5170         my %order_info = (
5171                 project => { key => 'path', type => 'str' },
5172                 descr => { key => 'descr_long', type => 'str' },
5173                 owner => { key => 'owner', type => 'str' },
5174                 age => { key => 'age', type => 'num' }
5175         );
5176         my $oi = $order_info{$order};
5177         return @$projlist unless defined $oi;
5178         if ($oi->{'type'} eq 'str') {
5179                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5180         } else {
5181                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5182         }
5183
5184         return @projects;
5185 }
5186
5187 # returns a hash of categories, containing the list of project
5188 # belonging to each category
5189 sub build_projlist_by_category {
5190         my ($projlist, $from, $to) = @_;
5191         my %categories;
5192
5193         $from = 0 unless defined $from;
5194         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5195
5196         for (my $i = $from; $i <= $to; $i++) {
5197                 my $pr = $projlist->[$i];
5198                 push @{$categories{ $pr->{'category'} }}, $pr;
5199         }
5200
5201         return wantarray ? %categories : \%categories;
5202 }
5203
5204 # print 'sort by' <th> element, generating 'sort by $name' replay link
5205 # if that order is not selected
5206 sub print_sort_th {
5207         print format_sort_th(@_);
5208 }
5209
5210 sub format_sort_th {
5211         my ($name, $order, $header) = @_;
5212         my $sort_th = "";
5213         $header ||= ucfirst($name);
5214
5215         if ($order eq $name) {
5216                 $sort_th .= "<th>$header</th>\n";
5217         } else {
5218                 $sort_th .= "<th>" .
5219                             $cgi->a({-href => href(-replay=>1, order=>$name),
5220                                      -class => "header"}, $header) .
5221                             "</th>\n";
5222         }
5223
5224         return $sort_th;
5225 }
5226
5227 sub git_project_list_rows {
5228         my ($projlist, $from, $to, $check_forks) = @_;
5229
5230         $from = 0 unless defined $from;
5231         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5232
5233         my $alternate = 1;
5234         for (my $i = $from; $i <= $to; $i++) {
5235                 my $pr = $projlist->[$i];
5236
5237                 if ($alternate) {
5238                         print "<tr class=\"dark\">\n";
5239                 } else {
5240                         print "<tr class=\"light\">\n";
5241                 }
5242                 $alternate ^= 1;
5243
5244                 if ($check_forks) {
5245                         print "<td>";
5246                         if ($pr->{'forks'}) {
5247                                 my $nforks = scalar @{$pr->{'forks'}};
5248                                 if ($nforks > 0) {
5249                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5250                                                        -title => "$nforks forks"}, "+");
5251                                 } else {
5252                                         print $cgi->span({-title => "$nforks forks"}, "+");
5253                                 }
5254                         }
5255                         print "</td>\n";
5256                 }
5257                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5258                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5259                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5260                                         -class => "list", -title => $pr->{'descr_long'}},
5261                                         esc_html($pr->{'descr'})) . "</td>\n" .
5262                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5263                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5264                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5265                       "<td class=\"link\">" .
5266                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5267                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5268                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5269                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5270                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5271                       "</td>\n" .
5272                       "</tr>\n";
5273         }
5274 }
5275
5276 sub git_project_list_body {
5277         # actually uses global variable $project
5278         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5279         my @projects = @$projlist;
5280
5281         my $check_forks = gitweb_check_feature('forks');
5282         my $show_ctags  = gitweb_check_feature('ctags');
5283         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5284         $check_forks = undef
5285                 if ($tagfilter || $searchtext);
5286
5287         # filtering out forks before filling info allows to do less work
5288         @projects = filter_forks_from_projects_list(\@projects)
5289                 if ($check_forks);
5290         @projects = fill_project_list_info(\@projects);
5291         # searching projects require filling to be run before it
5292         @projects = search_projects_list(\@projects,
5293                                          'searchtext' => $searchtext,
5294                                          'tagfilter'  => $tagfilter)
5295                 if ($tagfilter || $searchtext);
5296
5297         $order ||= $default_projects_order;
5298         $from = 0 unless defined $from;
5299         $to = $#projects if (!defined $to || $#projects < $to);
5300
5301         # short circuit
5302         if ($from > $to) {
5303                 print "<center>\n".
5304                       "<b>No such projects found</b><br />\n".
5305                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5306                       "</center>\n<br />\n";
5307                 return;
5308         }
5309
5310         @projects = sort_projects_list(\@projects, $order);
5311
5312         if ($show_ctags) {
5313                 my $ctags = git_gather_all_ctags(\@projects);
5314                 my $cloud = git_populate_project_tagcloud($ctags);
5315                 print git_show_project_tagcloud($cloud, 64);
5316         }
5317
5318         print "<table class=\"project_list\">\n";
5319         unless ($no_header) {
5320                 print "<tr>\n";
5321                 if ($check_forks) {
5322                         print "<th></th>\n";
5323                 }
5324                 print_sort_th('project', $order, 'Project');
5325                 print_sort_th('descr', $order, 'Description');
5326                 print_sort_th('owner', $order, 'Owner');
5327                 print_sort_th('age', $order, 'Last Change');
5328                 print "<th></th>\n" . # for links
5329                       "</tr>\n";
5330         }
5331
5332         if ($projects_list_group_categories) {
5333                 # only display categories with projects in the $from-$to window
5334                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5335                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5336                 foreach my $cat (sort keys %categories) {
5337                         unless ($cat eq "") {
5338                                 print "<tr>\n";
5339                                 if ($check_forks) {
5340                                         print "<td></td>\n";
5341                                 }
5342                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5343                                 print "</tr>\n";
5344                         }
5345
5346                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5347                 }
5348         } else {
5349                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5350         }
5351
5352         if (defined $extra) {
5353                 print "<tr>\n";
5354                 if ($check_forks) {
5355                         print "<td></td>\n";
5356                 }
5357                 print "<td colspan=\"5\">$extra</td>\n" .
5358                       "</tr>\n";
5359         }
5360         print "</table>\n";
5361 }
5362
5363 sub git_log_body {
5364         # uses global variable $project
5365         my ($commitlist, $from, $to, $refs, $extra) = @_;
5366
5367         $from = 0 unless defined $from;
5368         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5369
5370         for (my $i = 0; $i <= $to; $i++) {
5371                 my %co = %{$commitlist->[$i]};
5372                 next if !%co;
5373                 my $commit = $co{'id'};
5374                 my $ref = format_ref_marker($refs, $commit);
5375                 git_print_header_div('commit',
5376                                "<span class=\"age\">$co{'age_string'}</span>" .
5377                                esc_html($co{'title'}) . $ref,
5378                                $commit);
5379                 print "<div class=\"title_text\">\n" .
5380                       "<div class=\"log_link\">\n" .
5381                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5382                       " | " .
5383                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5384                       " | " .
5385                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5386                       "<br/>\n" .
5387                       "</div>\n";
5388                       git_print_authorship(\%co, -tag => 'span');
5389                       print "<br/>\n</div>\n";
5390
5391                 print "<div class=\"log_body\">\n";
5392                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5393                 print "</div>\n";
5394         }
5395         if ($extra) {
5396                 print "<div class=\"page_nav\">\n";
5397                 print "$extra\n";
5398                 print "</div>\n";
5399         }
5400 }
5401
5402 sub git_shortlog_body {
5403         # uses global variable $project
5404         my ($commitlist, $from, $to, $refs, $extra) = @_;
5405
5406         $from = 0 unless defined $from;
5407         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5408
5409         print "<table class=\"shortlog\">\n";
5410         my $alternate = 1;
5411         for (my $i = $from; $i <= $to; $i++) {
5412                 my %co = %{$commitlist->[$i]};
5413                 my $commit = $co{'id'};
5414                 my $ref = format_ref_marker($refs, $commit);
5415                 if ($alternate) {
5416                         print "<tr class=\"dark\">\n";
5417                 } else {
5418                         print "<tr class=\"light\">\n";
5419                 }
5420                 $alternate ^= 1;
5421                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5422                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5423                       format_author_html('td', \%co, 10) . "<td>";
5424                 print format_subject_html($co{'title'}, $co{'title_short'},
5425                                           href(action=>"commit", hash=>$commit), $ref);
5426                 print "</td>\n" .
5427                       "<td class=\"link\">" .
5428                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5429                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5430                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5431                 my $snapshot_links = format_snapshot_links($commit);
5432                 if (defined $snapshot_links) {
5433                         print " | " . $snapshot_links;
5434                 }
5435                 print "</td>\n" .
5436                       "</tr>\n";
5437         }
5438         if (defined $extra) {
5439                 print "<tr>\n" .
5440                       "<td colspan=\"4\">$extra</td>\n" .
5441                       "</tr>\n";
5442         }
5443         print "</table>\n";
5444 }
5445
5446 sub git_history_body {
5447         # Warning: assumes constant type (blob or tree) during history
5448         my ($commitlist, $from, $to, $refs, $extra,
5449             $file_name, $file_hash, $ftype) = @_;
5450
5451         $from = 0 unless defined $from;
5452         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5453
5454         print "<table class=\"history\">\n";
5455         my $alternate = 1;
5456         for (my $i = $from; $i <= $to; $i++) {
5457                 my %co = %{$commitlist->[$i]};
5458                 if (!%co) {
5459                         next;
5460                 }
5461                 my $commit = $co{'id'};
5462
5463                 my $ref = format_ref_marker($refs, $commit);
5464
5465                 if ($alternate) {
5466                         print "<tr class=\"dark\">\n";
5467                 } else {
5468                         print "<tr class=\"light\">\n";
5469                 }
5470                 $alternate ^= 1;
5471                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5472         # shortlog:   format_author_html('td', \%co, 10)
5473                       format_author_html('td', \%co, 15, 3) . "<td>";
5474                 # originally git_history used chop_str($co{'title'}, 50)
5475                 print format_subject_html($co{'title'}, $co{'title_short'},
5476                                           href(action=>"commit", hash=>$commit), $ref);
5477                 print "</td>\n" .
5478                       "<td class=\"link\">" .
5479                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5480                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5481
5482                 if ($ftype eq 'blob') {
5483                         my $blob_current = $file_hash;
5484                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5485                         if (defined $blob_current && defined $blob_parent &&
5486                                         $blob_current ne $blob_parent) {
5487                                 print " | " .
5488                                         $cgi->a({-href => href(action=>"blobdiff",
5489                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5490                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5491                                                                file_name=>$file_name)},
5492                                                 "diff to current");
5493                         }
5494                 }
5495                 print "</td>\n" .
5496                       "</tr>\n";
5497         }
5498         if (defined $extra) {
5499                 print "<tr>\n" .
5500                       "<td colspan=\"4\">$extra</td>\n" .
5501                       "</tr>\n";
5502         }
5503         print "</table>\n";
5504 }
5505
5506 sub git_tags_body {
5507         # uses global variable $project
5508         my ($taglist, $from, $to, $extra) = @_;
5509         $from = 0 unless defined $from;
5510         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5511
5512         print "<table class=\"tags\">\n";
5513         my $alternate = 1;
5514         for (my $i = $from; $i <= $to; $i++) {
5515                 my $entry = $taglist->[$i];
5516                 my %tag = %$entry;
5517                 my $comment = $tag{'subject'};
5518                 my $comment_short;
5519                 if (defined $comment) {
5520                         $comment_short = chop_str($comment, 30, 5);
5521                 }
5522                 if ($alternate) {
5523                         print "<tr class=\"dark\">\n";
5524                 } else {
5525                         print "<tr class=\"light\">\n";
5526                 }
5527                 $alternate ^= 1;
5528                 if (defined $tag{'age'}) {
5529                         print "<td><i>$tag{'age'}</i></td>\n";
5530                 } else {
5531                         print "<td></td>\n";
5532                 }
5533                 print "<td>" .
5534                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5535                                -class => "list name"}, esc_html($tag{'name'})) .
5536                       "</td>\n" .
5537                       "<td>";
5538                 if (defined $comment) {
5539                         print format_subject_html($comment, $comment_short,
5540                                                   href(action=>"tag", hash=>$tag{'id'}));
5541                 }
5542                 print "</td>\n" .
5543                       "<td class=\"selflink\">";
5544                 if ($tag{'type'} eq "tag") {
5545                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5546                 } else {
5547                         print "&nbsp;";
5548                 }
5549                 print "</td>\n" .
5550                       "<td class=\"link\">" . " | " .
5551                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5552                 if ($tag{'reftype'} eq "commit") {
5553                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5554                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5555                 } elsif ($tag{'reftype'} eq "blob") {
5556                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5557                 }
5558                 print "</td>\n" .
5559                       "</tr>";
5560         }
5561         if (defined $extra) {
5562                 print "<tr>\n" .
5563                       "<td colspan=\"5\">$extra</td>\n" .
5564                       "</tr>\n";
5565         }
5566         print "</table>\n";
5567 }
5568
5569 sub git_heads_body {
5570         # uses global variable $project
5571         my ($headlist, $head, $from, $to, $extra) = @_;
5572         $from = 0 unless defined $from;
5573         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5574
5575         print "<table class=\"heads\">\n";
5576         my $alternate = 1;
5577         for (my $i = $from; $i <= $to; $i++) {
5578                 my $entry = $headlist->[$i];
5579                 my %ref = %$entry;
5580                 my $curr = $ref{'id'} eq $head;
5581                 if ($alternate) {
5582                         print "<tr class=\"dark\">\n";
5583                 } else {
5584                         print "<tr class=\"light\">\n";
5585                 }
5586                 $alternate ^= 1;
5587                 print "<td><i>$ref{'age'}</i></td>\n" .
5588                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5589                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5590                                -class => "list name"},esc_html($ref{'name'})) .
5591                       "</td>\n" .
5592                       "<td class=\"link\">" .
5593                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5594                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5595                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5596                       "</td>\n" .
5597                       "</tr>";
5598         }
5599         if (defined $extra) {
5600                 print "<tr>\n" .
5601                       "<td colspan=\"3\">$extra</td>\n" .
5602                       "</tr>\n";
5603         }
5604         print "</table>\n";
5605 }
5606
5607 # Display a single remote block
5608 sub git_remote_block {
5609         my ($remote, $rdata, $limit, $head) = @_;
5610
5611         my $heads = $rdata->{'heads'};
5612         my $fetch = $rdata->{'fetch'};
5613         my $push = $rdata->{'push'};
5614
5615         my $urls_table = "<table class=\"projects_list\">\n" ;
5616
5617         if (defined $fetch) {
5618                 if ($fetch eq $push) {
5619                         $urls_table .= format_repo_url("URL", $fetch);
5620                 } else {
5621                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5622                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5623                 }
5624         } elsif (defined $push) {
5625                 $urls_table .= format_repo_url("Push URL", $push);
5626         } else {
5627                 $urls_table .= format_repo_url("", "No remote URL");
5628         }
5629
5630         $urls_table .= "</table>\n";
5631
5632         my $dots;
5633         if (defined $limit && $limit < @$heads) {
5634                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5635         }
5636
5637         print $urls_table;
5638         git_heads_body($heads, $head, 0, $limit, $dots);
5639 }
5640
5641 # Display a list of remote names with the respective fetch and push URLs
5642 sub git_remotes_list {
5643         my ($remotedata, $limit) = @_;
5644         print "<table class=\"heads\">\n";
5645         my $alternate = 1;
5646         my @remotes = sort keys %$remotedata;
5647
5648         my $limited = $limit && $limit < @remotes;
5649
5650         $#remotes = $limit - 1 if $limited;
5651
5652         while (my $remote = shift @remotes) {
5653                 my $rdata = $remotedata->{$remote};
5654                 my $fetch = $rdata->{'fetch'};
5655                 my $push = $rdata->{'push'};
5656                 if ($alternate) {
5657                         print "<tr class=\"dark\">\n";
5658                 } else {
5659                         print "<tr class=\"light\">\n";
5660                 }
5661                 $alternate ^= 1;
5662                 print "<td>" .
5663                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5664                                -class=> "list name"},esc_html($remote)) .
5665                       "</td>";
5666                 print "<td class=\"link\">" .
5667                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5668                       " | " .
5669                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5670                       "</td>";
5671
5672                 print "</tr>\n";
5673         }
5674
5675         if ($limited) {
5676                 print "<tr>\n" .
5677                       "<td colspan=\"3\">" .
5678                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5679                       "</td>\n" . "</tr>\n";
5680         }
5681
5682         print "</table>";
5683 }
5684
5685 # Display remote heads grouped by remote, unless there are too many
5686 # remotes, in which case we only display the remote names
5687 sub git_remotes_body {
5688         my ($remotedata, $limit, $head) = @_;
5689         if ($limit and $limit < keys %$remotedata) {
5690                 git_remotes_list($remotedata, $limit);
5691         } else {
5692                 fill_remote_heads($remotedata);
5693                 while (my ($remote, $rdata) = each %$remotedata) {
5694                         git_print_section({-class=>"remote", -id=>$remote},
5695                                 ["remotes", $remote, $remote], sub {
5696                                         git_remote_block($remote, $rdata, $limit, $head);
5697                                 });
5698                 }
5699         }
5700 }
5701
5702 sub git_search_message {
5703         my %co = @_;
5704
5705         my $greptype;
5706         if ($searchtype eq 'commit') {
5707                 $greptype = "--grep=";
5708         } elsif ($searchtype eq 'author') {
5709                 $greptype = "--author=";
5710         } elsif ($searchtype eq 'committer') {
5711                 $greptype = "--committer=";
5712         }
5713         $greptype .= $searchtext;
5714         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5715                                        $greptype, '--regexp-ignore-case',
5716                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5717
5718         my $paging_nav = '';
5719         if ($page > 0) {
5720                 $paging_nav .=
5721                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5722                                 "first") .
5723                         " &sdot; " .
5724                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5725                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5726         } else {
5727                 $paging_nav .= "first &sdot; prev";
5728         }
5729         my $next_link = '';
5730         if ($#commitlist >= 100) {
5731                 $next_link =
5732                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5733                                  -accesskey => "n", -title => "Alt-n"}, "next");
5734                 $paging_nav .= " &sdot; $next_link";
5735         } else {
5736                 $paging_nav .= " &sdot; next";
5737         }
5738
5739         git_header_html();
5740
5741         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5742         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5743         if ($page == 0 && !@commitlist) {
5744                 print "<p>No match.</p>\n";
5745         } else {
5746                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5747         }
5748
5749         git_footer_html();
5750 }
5751
5752 sub git_search_changes {
5753         my %co = @_;
5754
5755         local $/ = "\n";
5756         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5757                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5758                 ($search_use_regexp ? '--pickaxe-regex' : ())
5759                         or die_error(500, "Open git-log failed");
5760
5761         git_header_html();
5762
5763         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5764         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5765
5766         print "<table class=\"pickaxe search\">\n";
5767         my $alternate = 1;
5768         undef %co;
5769         my @files;
5770         while (my $line = <$fd>) {
5771                 chomp $line;
5772                 next unless $line;
5773
5774                 my %set = parse_difftree_raw_line($line);
5775                 if (defined $set{'commit'}) {
5776                         # finish previous commit
5777                         if (%co) {
5778                                 print "</td>\n" .
5779                                       "<td class=\"link\">" .
5780                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5781                                               "commit") .
5782                                       " | " .
5783                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5784                                                              hash_base=>$co{'id'})},
5785                                               "tree") .
5786                                       "</td>\n" .
5787                                       "</tr>\n";
5788                         }
5789
5790                         if ($alternate) {
5791                                 print "<tr class=\"dark\">\n";
5792                         } else {
5793                                 print "<tr class=\"light\">\n";
5794                         }
5795                         $alternate ^= 1;
5796                         %co = parse_commit($set{'commit'});
5797                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5798                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5799                               "<td><i>$author</i></td>\n" .
5800                               "<td>" .
5801                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5802                                       -class => "list subject"},
5803                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5804                 } elsif (defined $set{'to_id'}) {
5805                         next if ($set{'to_id'} =~ m/^0{40}$/);
5806
5807                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5808                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5809                                       -class => "list"},
5810                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5811                               "<br/>\n";
5812                 }
5813         }
5814         close $fd;
5815
5816         # finish last commit (warning: repetition!)
5817         if (%co) {
5818                 print "</td>\n" .
5819                       "<td class=\"link\">" .
5820                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5821                               "commit") .
5822                       " | " .
5823                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5824                                              hash_base=>$co{'id'})},
5825                               "tree") .
5826                       "</td>\n" .
5827                       "</tr>\n";
5828         }
5829
5830         print "</table>\n";
5831
5832         git_footer_html();
5833 }
5834
5835 sub git_search_files {
5836         my %co = @_;
5837
5838         local $/ = "\n";
5839         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5840                 $search_use_regexp ? ('-E', '-i') : '-F',
5841                 $searchtext, $co{'tree'}
5842                         or die_error(500, "Open git-grep failed");
5843
5844         git_header_html();
5845
5846         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5847         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5848
5849         print "<table class=\"grep_search\">\n";
5850         my $alternate = 1;
5851         my $matches = 0;
5852         my $lastfile = '';
5853         my $file_href;
5854         while (my $line = <$fd>) {
5855                 chomp $line;
5856                 my ($file, $lno, $ltext, $binary);
5857                 last if ($matches++ > 1000);
5858                 if ($line =~ /^Binary file (.+) matches$/) {
5859                         $file = $1;
5860                         $binary = 1;
5861                 } else {
5862                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5863                         $file =~ s/^$co{'tree'}://;
5864                 }
5865                 if ($file ne $lastfile) {
5866                         $lastfile and print "</td></tr>\n";
5867                         if ($alternate++) {
5868                                 print "<tr class=\"dark\">\n";
5869                         } else {
5870                                 print "<tr class=\"light\">\n";
5871                         }
5872                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5873                                           file_name=>$file);
5874                         print "<td class=\"list\">".
5875                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5876                         print "</td><td>\n";
5877                         $lastfile = $file;
5878                 }
5879                 if ($binary) {
5880                         print "<div class=\"binary\">Binary file</div>\n";
5881                 } else {
5882                         $ltext = untabify($ltext);
5883                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5884                                 $ltext = esc_html($1, -nbsp=>1);
5885                                 $ltext .= '<span class="match">';
5886                                 $ltext .= esc_html($2, -nbsp=>1);
5887                                 $ltext .= '</span>';
5888                                 $ltext .= esc_html($3, -nbsp=>1);
5889                         } else {
5890                                 $ltext = esc_html($ltext, -nbsp=>1);
5891                         }
5892                         print "<div class=\"pre\">" .
5893                                 $cgi->a({-href => $file_href.'#l'.$lno,
5894                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5895                                 ' ' .  $ltext . "</div>\n";
5896                 }
5897         }
5898         if ($lastfile) {
5899                 print "</td></tr>\n";
5900                 if ($matches > 1000) {
5901                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5902                 }
5903         } else {
5904                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5905         }
5906         close $fd;
5907
5908         print "</table>\n";
5909
5910         git_footer_html();
5911 }
5912
5913 sub git_search_grep_body {
5914         my ($commitlist, $from, $to, $extra) = @_;
5915         $from = 0 unless defined $from;
5916         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5917
5918         print "<table class=\"commit_search\">\n";
5919         my $alternate = 1;
5920         for (my $i = $from; $i <= $to; $i++) {
5921                 my %co = %{$commitlist->[$i]};
5922                 if (!%co) {
5923                         next;
5924                 }
5925                 my $commit = $co{'id'};
5926                 if ($alternate) {
5927                         print "<tr class=\"dark\">\n";
5928                 } else {
5929                         print "<tr class=\"light\">\n";
5930                 }
5931                 $alternate ^= 1;
5932                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5933                       format_author_html('td', \%co, 15, 5) .
5934                       "<td>" .
5935                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5936                                -class => "list subject"},
5937                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5938                 my $comment = $co{'comment'};
5939                 foreach my $line (@$comment) {
5940                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5941                                 my ($lead, $match, $trail) = ($1, $2, $3);
5942                                 $match = chop_str($match, 70, 5, 'center');
5943                                 my $contextlen = int((80 - length($match))/2);
5944                                 $contextlen = 30 if ($contextlen > 30);
5945                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5946                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5947
5948                                 $lead  = esc_html($lead);
5949                                 $match = esc_html($match);
5950                                 $trail = esc_html($trail);
5951
5952                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5953                         }
5954                 }
5955                 print "</td>\n" .
5956                       "<td class=\"link\">" .
5957                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5958                       " | " .
5959                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5960                       " | " .
5961                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5962                 print "</td>\n" .
5963                       "</tr>\n";
5964         }
5965         if (defined $extra) {
5966                 print "<tr>\n" .
5967                       "<td colspan=\"3\">$extra</td>\n" .
5968                       "</tr>\n";
5969         }
5970         print "</table>\n";
5971 }
5972
5973 ## ======================================================================
5974 ## ======================================================================
5975 ## actions
5976
5977 sub git_project_list {
5978         my $order = $input_params{'order'};
5979         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5980                 die_error(400, "Unknown order parameter");
5981         }
5982
5983         my @list = git_get_projects_list();
5984         if (!@list) {
5985                 die_error(404, "No projects found");
5986         }
5987
5988         git_header_html();
5989         if (defined $home_text && -f $home_text) {
5990                 print "<div class=\"index_include\">\n";
5991                 insert_file($home_text);
5992                 print "</div>\n";
5993         }
5994         print $cgi->startform(-method => "get") .
5995               "<p class=\"projsearch\">Search:\n" .
5996               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
5997               "</p>" .
5998               $cgi->end_form() . "\n";
5999         git_project_list_body(\@list, $order);
6000         git_footer_html();
6001 }
6002
6003 sub git_forks {
6004         my $order = $input_params{'order'};
6005         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6006                 die_error(400, "Unknown order parameter");
6007         }
6008
6009         my @list = git_get_projects_list($project);
6010         if (!@list) {
6011                 die_error(404, "No forks found");
6012         }
6013
6014         git_header_html();
6015         git_print_page_nav('','');
6016         git_print_header_div('summary', "$project forks");
6017         git_project_list_body(\@list, $order);
6018         git_footer_html();
6019 }
6020
6021 sub git_project_index {
6022         my @projects = git_get_projects_list();
6023         if (!@projects) {
6024                 die_error(404, "No projects found");
6025         }
6026
6027         print $cgi->header(
6028                 -type => 'text/plain',
6029                 -charset => 'utf-8',
6030                 -content_disposition => 'inline; filename="index.aux"');
6031
6032         foreach my $pr (@projects) {
6033                 if (!exists $pr->{'owner'}) {
6034                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6035                 }
6036
6037                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6038                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6039                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6040                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6041                 $path  =~ s/ /\+/g;
6042                 $owner =~ s/ /\+/g;
6043
6044                 print "$path $owner\n";
6045         }
6046 }
6047
6048 sub git_summary {
6049         my $descr = git_get_project_description($project) || "none";
6050         my %co = parse_commit("HEAD");
6051         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6052         my $head = $co{'id'};
6053         my $remote_heads = gitweb_check_feature('remote_heads');
6054
6055         my $owner = git_get_project_owner($project);
6056
6057         my $refs = git_get_references();
6058         # These get_*_list functions return one more to allow us to see if
6059         # there are more ...
6060         my @taglist  = git_get_tags_list(16);
6061         my @headlist = git_get_heads_list(16);
6062         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6063         my @forklist;
6064         my $check_forks = gitweb_check_feature('forks');
6065
6066         if ($check_forks) {
6067                 # find forks of a project
6068                 @forklist = git_get_projects_list($project);
6069                 # filter out forks of forks
6070                 @forklist = filter_forks_from_projects_list(\@forklist)
6071                         if (@forklist);
6072         }
6073
6074         git_header_html();
6075         git_print_page_nav('summary','', $head);
6076
6077         print "<div class=\"title\">&nbsp;</div>\n";
6078         print "<table class=\"projects_list\">\n" .
6079               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6080               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6081         if (defined $cd{'rfc2822'}) {
6082                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6083                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6084         }
6085
6086         # use per project git URL list in $projectroot/$project/cloneurl
6087         # or make project git URL from git base URL and project name
6088         my $url_tag = "URL";
6089         my @url_list = git_get_project_url_list($project);
6090         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6091         foreach my $git_url (@url_list) {
6092                 next unless $git_url;
6093                 print format_repo_url($url_tag, $git_url);
6094                 $url_tag = "";
6095         }
6096
6097         # Tag cloud
6098         my $show_ctags = gitweb_check_feature('ctags');
6099         if ($show_ctags) {
6100                 my $ctags = git_get_project_ctags($project);
6101                 if (%$ctags) {
6102                         # without ability to add tags, don't show if there are none
6103                         my $cloud = git_populate_project_tagcloud($ctags);
6104                         print "<tr id=\"metadata_ctags\">" .
6105                               "<td>content tags</td>" .
6106                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6107                               "</tr>\n";
6108                 }
6109         }
6110
6111         print "</table>\n";
6112
6113         # If XSS prevention is on, we don't include README.html.
6114         # TODO: Allow a readme in some safe format.
6115         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6116                 print "<div class=\"title\">readme</div>\n" .
6117                       "<div class=\"readme\">\n";
6118                 insert_file("$projectroot/$project/README.html");
6119                 print "\n</div>\n"; # class="readme"
6120         }
6121
6122         # we need to request one more than 16 (0..15) to check if
6123         # those 16 are all
6124         my @commitlist = $head ? parse_commits($head, 17) : ();
6125         if (@commitlist) {
6126                 git_print_header_div('shortlog');
6127                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6128                                   $#commitlist <=  15 ? undef :
6129                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6130         }
6131
6132         if (@taglist) {
6133                 git_print_header_div('tags');
6134                 git_tags_body(\@taglist, 0, 15,
6135                               $#taglist <=  15 ? undef :
6136                               $cgi->a({-href => href(action=>"tags")}, "..."));
6137         }
6138
6139         if (@headlist) {
6140                 git_print_header_div('heads');
6141                 git_heads_body(\@headlist, $head, 0, 15,
6142                                $#headlist <= 15 ? undef :
6143                                $cgi->a({-href => href(action=>"heads")}, "..."));
6144         }
6145
6146         if (%remotedata) {
6147                 git_print_header_div('remotes');
6148                 git_remotes_body(\%remotedata, 15, $head);
6149         }
6150
6151         if (@forklist) {
6152                 git_print_header_div('forks');
6153                 git_project_list_body(\@forklist, 'age', 0, 15,
6154                                       $#forklist <= 15 ? undef :
6155                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6156                                       'no_header');
6157         }
6158
6159         git_footer_html();
6160 }
6161
6162 sub git_tag {
6163         my %tag = parse_tag($hash);
6164
6165         if (! %tag) {
6166                 die_error(404, "Unknown tag object");
6167         }
6168
6169         my $head = git_get_head_hash($project);
6170         git_header_html();
6171         git_print_page_nav('','', $head,undef,$head);
6172         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6173         print "<div class=\"title_text\">\n" .
6174               "<table class=\"object_header\">\n" .
6175               "<tr>\n" .
6176               "<td>object</td>\n" .
6177               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6178                                $tag{'object'}) . "</td>\n" .
6179               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6180                                               $tag{'type'}) . "</td>\n" .
6181               "</tr>\n";
6182         if (defined($tag{'author'})) {
6183                 git_print_authorship_rows(\%tag, 'author');
6184         }
6185         print "</table>\n\n" .
6186               "</div>\n";
6187         print "<div class=\"page_body\">";
6188         my $comment = $tag{'comment'};
6189         foreach my $line (@$comment) {
6190                 chomp $line;
6191                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6192         }
6193         print "</div>\n";
6194         git_footer_html();
6195 }
6196
6197 sub git_blame_common {
6198         my $format = shift || 'porcelain';
6199         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6200                 $format = 'incremental';
6201                 $action = 'blame_incremental'; # for page title etc
6202         }
6203
6204         # permissions
6205         gitweb_check_feature('blame')
6206                 or die_error(403, "Blame view not allowed");
6207
6208         # error checking
6209         die_error(400, "No file name given") unless $file_name;
6210         $hash_base ||= git_get_head_hash($project);
6211         die_error(404, "Couldn't find base commit") unless $hash_base;
6212         my %co = parse_commit($hash_base)
6213                 or die_error(404, "Commit not found");
6214         my $ftype = "blob";
6215         if (!defined $hash) {
6216                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6217                         or die_error(404, "Error looking up file");
6218         } else {
6219                 $ftype = git_get_type($hash);
6220                 if ($ftype !~ "blob") {
6221                         die_error(400, "Object is not a blob");
6222                 }
6223         }
6224
6225         my $fd;
6226         if ($format eq 'incremental') {
6227                 # get file contents (as base)
6228                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6229                         or die_error(500, "Open git-cat-file failed");
6230         } elsif ($format eq 'data') {
6231                 # run git-blame --incremental
6232                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6233                         $hash_base, "--", $file_name
6234                         or die_error(500, "Open git-blame --incremental failed");
6235         } else {
6236                 # run git-blame --porcelain
6237                 open $fd, "-|", git_cmd(), "blame", '-p',
6238                         $hash_base, '--', $file_name
6239                         or die_error(500, "Open git-blame --porcelain failed");
6240         }
6241
6242         # incremental blame data returns early
6243         if ($format eq 'data') {
6244                 print $cgi->header(
6245                         -type=>"text/plain", -charset => "utf-8",
6246                         -status=> "200 OK");
6247                 local $| = 1; # output autoflush
6248                 while (my $line = <$fd>) {
6249                         print to_utf8($line);
6250                 }
6251                 close $fd
6252                         or print "ERROR $!\n";
6253
6254                 print 'END';
6255                 if (defined $t0 && gitweb_check_feature('timed')) {
6256                         print ' '.
6257                               tv_interval($t0, [ gettimeofday() ]).
6258                               ' '.$number_of_git_cmds;
6259                 }
6260                 print "\n";
6261
6262                 return;
6263         }
6264
6265         # page header
6266         git_header_html();
6267         my $formats_nav =
6268                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6269                         "blob") .
6270                 " | ";
6271         if ($format eq 'incremental') {
6272                 $formats_nav .=
6273                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6274                                 "blame") . " (non-incremental)";
6275         } else {
6276                 $formats_nav .=
6277                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6278                                 "blame") . " (incremental)";
6279         }
6280         $formats_nav .=
6281                 " | " .
6282                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6283                         "history") .
6284                 " | " .
6285                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6286                         "HEAD");
6287         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6288         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6289         git_print_page_path($file_name, $ftype, $hash_base);
6290
6291         # page body
6292         if ($format eq 'incremental') {
6293                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6294                       "This page requires JavaScript to run.\n Use ".
6295                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6296                               'this page').
6297                       " instead.\n".
6298                       "</b></center></div>\n</noscript>\n";
6299
6300                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6301         }
6302
6303         print qq!<div class="page_body">\n!;
6304         print qq!<div id="progress_info">... / ...</div>\n!
6305                 if ($format eq 'incremental');
6306         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6307               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6308               qq!<thead>\n!.
6309               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6310               qq!</thead>\n!.
6311               qq!<tbody>\n!;
6312
6313         my @rev_color = qw(light dark);
6314         my $num_colors = scalar(@rev_color);
6315         my $current_color = 0;
6316
6317         if ($format eq 'incremental') {
6318                 my $color_class = $rev_color[$current_color];
6319
6320                 #contents of a file
6321                 my $linenr = 0;
6322         LINE:
6323                 while (my $line = <$fd>) {
6324                         chomp $line;
6325                         $linenr++;
6326
6327                         print qq!<tr id="l$linenr" class="$color_class">!.
6328                               qq!<td class="sha1"><a href=""> </a></td>!.
6329                               qq!<td class="linenr">!.
6330                               qq!<a class="linenr" href="">$linenr</a></td>!;
6331                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6332                         print qq!</tr>\n!;
6333                 }
6334
6335         } else { # porcelain, i.e. ordinary blame
6336                 my %metainfo = (); # saves information about commits
6337
6338                 # blame data
6339         LINE:
6340                 while (my $line = <$fd>) {
6341                         chomp $line;
6342                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6343                         # no <lines in group> for subsequent lines in group of lines
6344                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6345                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6346                         if (!exists $metainfo{$full_rev}) {
6347                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6348                         }
6349                         my $meta = $metainfo{$full_rev};
6350                         my $data;
6351                         while ($data = <$fd>) {
6352                                 chomp $data;
6353                                 last if ($data =~ s/^\t//); # contents of line
6354                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6355                                         $meta->{$1} = $2 unless exists $meta->{$1};
6356                                 }
6357                                 if ($data =~ /^previous /) {
6358                                         $meta->{'nprevious'}++;
6359                                 }
6360                         }
6361                         my $short_rev = substr($full_rev, 0, 8);
6362                         my $author = $meta->{'author'};
6363                         my %date =
6364                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6365                         my $date = $date{'iso-tz'};
6366                         if ($group_size) {
6367                                 $current_color = ($current_color + 1) % $num_colors;
6368                         }
6369                         my $tr_class = $rev_color[$current_color];
6370                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6371                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6372                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6373                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6374                         if ($group_size) {
6375                                 print "<td class=\"sha1\"";
6376                                 print " title=\"". esc_html($author) . ", $date\"";
6377                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6378                                 print ">";
6379                                 print $cgi->a({-href => href(action=>"commit",
6380                                                              hash=>$full_rev,
6381                                                              file_name=>$file_name)},
6382                                               esc_html($short_rev));
6383                                 if ($group_size >= 2) {
6384                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6385                                         if (@author_initials) {
6386                                                 print "<br />" .
6387                                                       esc_html(join('', @author_initials));
6388                                                 #           or join('.', ...)
6389                                         }
6390                                 }
6391                                 print "</td>\n";
6392                         }
6393                         # 'previous' <sha1 of parent commit> <filename at commit>
6394                         if (exists $meta->{'previous'} &&
6395                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6396                                 $meta->{'parent'} = $1;
6397                                 $meta->{'file_parent'} = unquote($2);
6398                         }
6399                         my $linenr_commit =
6400                                 exists($meta->{'parent'}) ?
6401                                 $meta->{'parent'} : $full_rev;
6402                         my $linenr_filename =
6403                                 exists($meta->{'file_parent'}) ?
6404                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6405                         my $blamed = href(action => 'blame',
6406                                           file_name => $linenr_filename,
6407                                           hash_base => $linenr_commit);
6408                         print "<td class=\"linenr\">";
6409                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6410                                         -class => "linenr" },
6411                                       esc_html($lineno));
6412                         print "</td>";
6413                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6414                         print "</tr>\n";
6415                 } # end while
6416
6417         }
6418
6419         # footer
6420         print "</tbody>\n".
6421               "</table>\n"; # class="blame"
6422         print "</div>\n";   # class="blame_body"
6423         close $fd
6424                 or print "Reading blob failed\n";
6425
6426         git_footer_html();
6427 }
6428
6429 sub git_blame {
6430         git_blame_common();
6431 }
6432
6433 sub git_blame_incremental {
6434         git_blame_common('incremental');
6435 }
6436
6437 sub git_blame_data {
6438         git_blame_common('data');
6439 }
6440
6441 sub git_tags {
6442         my $head = git_get_head_hash($project);
6443         git_header_html();
6444         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6445         git_print_header_div('summary', $project);
6446
6447         my @tagslist = git_get_tags_list();
6448         if (@tagslist) {
6449                 git_tags_body(\@tagslist);
6450         }
6451         git_footer_html();
6452 }
6453
6454 sub git_heads {
6455         my $head = git_get_head_hash($project);
6456         git_header_html();
6457         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6458         git_print_header_div('summary', $project);
6459
6460         my @headslist = git_get_heads_list();
6461         if (@headslist) {
6462                 git_heads_body(\@headslist, $head);
6463         }
6464         git_footer_html();
6465 }
6466
6467 # used both for single remote view and for list of all the remotes
6468 sub git_remotes {
6469         gitweb_check_feature('remote_heads')
6470                 or die_error(403, "Remote heads view is disabled");
6471
6472         my $head = git_get_head_hash($project);
6473         my $remote = $input_params{'hash'};
6474
6475         my $remotedata = git_get_remotes_list($remote);
6476         die_error(500, "Unable to get remote information") unless defined $remotedata;
6477
6478         unless (%$remotedata) {
6479                 die_error(404, defined $remote ?
6480                         "Remote $remote not found" :
6481                         "No remotes found");
6482         }
6483
6484         git_header_html(undef, undef, -action_extra => $remote);
6485         git_print_page_nav('', '',  $head, undef, $head,
6486                 format_ref_views($remote ? '' : 'remotes'));
6487
6488         fill_remote_heads($remotedata);
6489         if (defined $remote) {
6490                 git_print_header_div('remotes', "$remote remote for $project");
6491                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6492         } else {
6493                 git_print_header_div('summary', "$project remotes");
6494                 git_remotes_body($remotedata, undef, $head);
6495         }
6496
6497         git_footer_html();
6498 }
6499
6500 sub git_blob_plain {
6501         my $type = shift;
6502         my $expires;
6503
6504         if (!defined $hash) {
6505                 if (defined $file_name) {
6506                         my $base = $hash_base || git_get_head_hash($project);
6507                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6508                                 or die_error(404, "Cannot find file");
6509                 } else {
6510                         die_error(400, "No file name defined");
6511                 }
6512         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6513                 # blobs defined by non-textual hash id's can be cached
6514                 $expires = "+1d";
6515         }
6516
6517         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6518                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6519
6520         # content-type (can include charset)
6521         $type = blob_contenttype($fd, $file_name, $type);
6522
6523         # "save as" filename, even when no $file_name is given
6524         my $save_as = "$hash";
6525         if (defined $file_name) {
6526                 $save_as = $file_name;
6527         } elsif ($type =~ m/^text\//) {
6528                 $save_as .= '.txt';
6529         }
6530
6531         # With XSS prevention on, blobs of all types except a few known safe
6532         # ones are served with "Content-Disposition: attachment" to make sure
6533         # they don't run in our security domain.  For certain image types,
6534         # blob view writes an <img> tag referring to blob_plain view, and we
6535         # want to be sure not to break that by serving the image as an
6536         # attachment (though Firefox 3 doesn't seem to care).
6537         my $sandbox = $prevent_xss &&
6538                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6539
6540         # serve text/* as text/plain
6541         if ($prevent_xss &&
6542             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6543              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6544                 my $rest = $1;
6545                 $rest = defined $rest ? $rest : '';
6546                 $type = "text/plain$rest";
6547         }
6548
6549         print $cgi->header(
6550                 -type => $type,
6551                 -expires => $expires,
6552                 -content_disposition =>
6553                         ($sandbox ? 'attachment' : 'inline')
6554                         . '; filename="' . $save_as . '"');
6555         local $/ = undef;
6556         binmode STDOUT, ':raw';
6557         print <$fd>;
6558         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6559         close $fd;
6560 }
6561
6562 sub git_blob {
6563         my $expires;
6564
6565         if (!defined $hash) {
6566                 if (defined $file_name) {
6567                         my $base = $hash_base || git_get_head_hash($project);
6568                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6569                                 or die_error(404, "Cannot find file");
6570                 } else {
6571                         die_error(400, "No file name defined");
6572                 }
6573         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6574                 # blobs defined by non-textual hash id's can be cached
6575                 $expires = "+1d";
6576         }
6577
6578         my $have_blame = gitweb_check_feature('blame');
6579         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6580                 or die_error(500, "Couldn't cat $file_name, $hash");
6581         my $mimetype = blob_mimetype($fd, $file_name);
6582         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6583         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6584                 close $fd;
6585                 return git_blob_plain($mimetype);
6586         }
6587         # we can have blame only for text/* mimetype
6588         $have_blame &&= ($mimetype =~ m!^text/!);
6589
6590         my $highlight = gitweb_check_feature('highlight');
6591         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6592         $fd = run_highlighter($fd, $highlight, $syntax)
6593                 if $syntax;
6594
6595         git_header_html(undef, $expires);
6596         my $formats_nav = '';
6597         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6598                 if (defined $file_name) {
6599                         if ($have_blame) {
6600                                 $formats_nav .=
6601                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6602                                                 "blame") .
6603                                         " | ";
6604                         }
6605                         $formats_nav .=
6606                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6607                                         "history") .
6608                                 " | " .
6609                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6610                                         "raw") .
6611                                 " | " .
6612                                 $cgi->a({-href => href(action=>"blob",
6613                                                        hash_base=>"HEAD", file_name=>$file_name)},
6614                                         "HEAD");
6615                 } else {
6616                         $formats_nav .=
6617                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6618                                         "raw");
6619                 }
6620                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6621                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6622         } else {
6623                 print "<div class=\"page_nav\">\n" .
6624                       "<br/><br/></div>\n" .
6625                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6626         }
6627         git_print_page_path($file_name, "blob", $hash_base);
6628         print "<div class=\"page_body\">\n";
6629         if ($mimetype =~ m!^image/!) {
6630                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6631                 if ($file_name) {
6632                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6633                 }
6634                 print qq! src="! .
6635                       href(action=>"blob_plain", hash=>$hash,
6636                            hash_base=>$hash_base, file_name=>$file_name) .
6637                       qq!" />\n!;
6638         } else {
6639                 my $nr;
6640                 while (my $line = <$fd>) {
6641                         chomp $line;
6642                         $nr++;
6643                         $line = untabify($line);
6644                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6645                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6646                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6647                 }
6648         }
6649         close $fd
6650                 or print "Reading blob failed.\n";
6651         print "</div>";
6652         git_footer_html();
6653 }
6654
6655 sub git_tree {
6656         if (!defined $hash_base) {
6657                 $hash_base = "HEAD";
6658         }
6659         if (!defined $hash) {
6660                 if (defined $file_name) {
6661                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6662                 } else {
6663                         $hash = $hash_base;
6664                 }
6665         }
6666         die_error(404, "No such tree") unless defined($hash);
6667
6668         my $show_sizes = gitweb_check_feature('show-sizes');
6669         my $have_blame = gitweb_check_feature('blame');
6670
6671         my @entries = ();
6672         {
6673                 local $/ = "\0";
6674                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6675                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6676                         or die_error(500, "Open git-ls-tree failed");
6677                 @entries = map { chomp; $_ } <$fd>;
6678                 close $fd
6679                         or die_error(404, "Reading tree failed");
6680         }
6681
6682         my $refs = git_get_references();
6683         my $ref = format_ref_marker($refs, $hash_base);
6684         git_header_html();
6685         my $basedir = '';
6686         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6687                 my @views_nav = ();
6688                 if (defined $file_name) {
6689                         push @views_nav,
6690                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6691                                         "history"),
6692                                 $cgi->a({-href => href(action=>"tree",
6693                                                        hash_base=>"HEAD", file_name=>$file_name)},
6694                                         "HEAD"),
6695                 }
6696                 my $snapshot_links = format_snapshot_links($hash);
6697                 if (defined $snapshot_links) {
6698                         # FIXME: Should be available when we have no hash base as well.
6699                         push @views_nav, $snapshot_links;
6700                 }
6701                 git_print_page_nav('tree','', $hash_base, undef, undef,
6702                                    join(' | ', @views_nav));
6703                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6704         } else {
6705                 undef $hash_base;
6706                 print "<div class=\"page_nav\">\n";
6707                 print "<br/><br/></div>\n";
6708                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6709         }
6710         if (defined $file_name) {
6711                 $basedir = $file_name;
6712                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6713                         $basedir .= '/';
6714                 }
6715                 git_print_page_path($file_name, 'tree', $hash_base);
6716         }
6717         print "<div class=\"page_body\">\n";
6718         print "<table class=\"tree\">\n";
6719         my $alternate = 1;
6720         # '..' (top directory) link if possible
6721         if (defined $hash_base &&
6722             defined $file_name && $file_name =~ m![^/]+$!) {
6723                 if ($alternate) {
6724                         print "<tr class=\"dark\">\n";
6725                 } else {
6726                         print "<tr class=\"light\">\n";
6727                 }
6728                 $alternate ^= 1;
6729
6730                 my $up = $file_name;
6731                 $up =~ s!/?[^/]+$!!;
6732                 undef $up unless $up;
6733                 # based on git_print_tree_entry
6734                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6735                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6736                 print '<td class="list">';
6737                 print $cgi->a({-href => href(action=>"tree",
6738                                              hash_base=>$hash_base,
6739                                              file_name=>$up)},
6740                               "..");
6741                 print "</td>\n";
6742                 print "<td class=\"link\"></td>\n";
6743
6744                 print "</tr>\n";
6745         }
6746         foreach my $line (@entries) {
6747                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6748
6749                 if ($alternate) {
6750                         print "<tr class=\"dark\">\n";
6751                 } else {
6752                         print "<tr class=\"light\">\n";
6753                 }
6754                 $alternate ^= 1;
6755
6756                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6757
6758                 print "</tr>\n";
6759         }
6760         print "</table>\n" .
6761               "</div>";
6762         git_footer_html();
6763 }
6764
6765 sub snapshot_name {
6766         my ($project, $hash) = @_;
6767
6768         # path/to/project.git  -> project
6769         # path/to/project/.git -> project
6770         my $name = to_utf8($project);
6771         $name =~ s,([^/])/*\.git$,$1,;
6772         $name = basename($name);
6773         # sanitize name
6774         $name =~ s/[[:cntrl:]]/?/g;
6775
6776         my $ver = $hash;
6777         if ($hash =~ /^[0-9a-fA-F]+$/) {
6778                 # shorten SHA-1 hash
6779                 my $full_hash = git_get_full_hash($project, $hash);
6780                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6781                         $ver = git_get_short_hash($project, $hash);
6782                 }
6783         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6784                 # tags don't need shortened SHA-1 hash
6785                 $ver = $1;
6786         } else {
6787                 # branches and other need shortened SHA-1 hash
6788                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6789                         $ver = $1;
6790                 }
6791                 $ver .= '-' . git_get_short_hash($project, $hash);
6792         }
6793         # in case of hierarchical branch names
6794         $ver =~ s!/!.!g;
6795
6796         # name = project-version_string
6797         $name = "$name-$ver";
6798
6799         return wantarray ? ($name, $name) : $name;
6800 }
6801
6802 sub git_snapshot {
6803         my $format = $input_params{'snapshot_format'};
6804         if (!@snapshot_fmts) {
6805                 die_error(403, "Snapshots not allowed");
6806         }
6807         # default to first supported snapshot format
6808         $format ||= $snapshot_fmts[0];
6809         if ($format !~ m/^[a-z0-9]+$/) {
6810                 die_error(400, "Invalid snapshot format parameter");
6811         } elsif (!exists($known_snapshot_formats{$format})) {
6812                 die_error(400, "Unknown snapshot format");
6813         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6814                 die_error(403, "Snapshot format not allowed");
6815         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6816                 die_error(403, "Unsupported snapshot format");
6817         }
6818
6819         my $type = git_get_type("$hash^{}");
6820         if (!$type) {
6821                 die_error(404, 'Object does not exist');
6822         }  elsif ($type eq 'blob') {
6823                 die_error(400, 'Object is not a tree-ish');
6824         }
6825
6826         my ($name, $prefix) = snapshot_name($project, $hash);
6827         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6828         my $cmd = quote_command(
6829                 git_cmd(), 'archive',
6830                 "--format=$known_snapshot_formats{$format}{'format'}",
6831                 "--prefix=$prefix/", $hash);
6832         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6833                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6834         }
6835
6836         $filename =~ s/(["\\])/\\$1/g;
6837         print $cgi->header(
6838                 -type => $known_snapshot_formats{$format}{'type'},
6839                 -content_disposition => 'inline; filename="' . $filename . '"',
6840                 -status => '200 OK');
6841
6842         open my $fd, "-|", $cmd
6843                 or die_error(500, "Execute git-archive failed");
6844         binmode STDOUT, ':raw';
6845         print <$fd>;
6846         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6847         close $fd;
6848 }
6849
6850 sub git_log_generic {
6851         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6852
6853         my $head = git_get_head_hash($project);
6854         if (!defined $base) {
6855                 $base = $head;
6856         }
6857         if (!defined $page) {
6858                 $page = 0;
6859         }
6860         my $refs = git_get_references();
6861
6862         my $commit_hash = $base;
6863         if (defined $parent) {
6864                 $commit_hash = "$parent..$base";
6865         }
6866         my @commitlist =
6867                 parse_commits($commit_hash, 101, (100 * $page),
6868                               defined $file_name ? ($file_name, "--full-history") : ());
6869
6870         my $ftype;
6871         if (!defined $file_hash && defined $file_name) {
6872                 # some commits could have deleted file in question,
6873                 # and not have it in tree, but one of them has to have it
6874                 for (my $i = 0; $i < @commitlist; $i++) {
6875                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6876                         last if defined $file_hash;
6877                 }
6878         }
6879         if (defined $file_hash) {
6880                 $ftype = git_get_type($file_hash);
6881         }
6882         if (defined $file_name && !defined $ftype) {
6883                 die_error(500, "Unknown type of object");
6884         }
6885         my %co;
6886         if (defined $file_name) {
6887                 %co = parse_commit($base)
6888                         or die_error(404, "Unknown commit object");
6889         }
6890
6891
6892         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6893         my $next_link = '';
6894         if ($#commitlist >= 100) {
6895                 $next_link =
6896                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6897                                  -accesskey => "n", -title => "Alt-n"}, "next");
6898         }
6899         my $patch_max = gitweb_get_feature('patches');
6900         if ($patch_max && !defined $file_name) {
6901                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6902                         $paging_nav .= " &sdot; " .
6903                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6904                                         "patches");
6905                 }
6906         }
6907
6908         git_header_html();
6909         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6910         if (defined $file_name) {
6911                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6912         } else {
6913                 git_print_header_div('summary', $project)
6914         }
6915         git_print_page_path($file_name, $ftype, $hash_base)
6916                 if (defined $file_name);
6917
6918         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6919                      $file_name, $file_hash, $ftype);
6920
6921         git_footer_html();
6922 }
6923
6924 sub git_log {
6925         git_log_generic('log', \&git_log_body,
6926                         $hash, $hash_parent);
6927 }
6928
6929 sub git_commit {
6930         $hash ||= $hash_base || "HEAD";
6931         my %co = parse_commit($hash)
6932             or die_error(404, "Unknown commit object");
6933
6934         my $parent  = $co{'parent'};
6935         my $parents = $co{'parents'}; # listref
6936
6937         # we need to prepare $formats_nav before any parameter munging
6938         my $formats_nav;
6939         if (!defined $parent) {
6940                 # --root commitdiff
6941                 $formats_nav .= '(initial)';
6942         } elsif (@$parents == 1) {
6943                 # single parent commit
6944                 $formats_nav .=
6945                         '(parent: ' .
6946                         $cgi->a({-href => href(action=>"commit",
6947                                                hash=>$parent)},
6948                                 esc_html(substr($parent, 0, 7))) .
6949                         ')';
6950         } else {
6951                 # merge commit
6952                 $formats_nav .=
6953                         '(merge: ' .
6954                         join(' ', map {
6955                                 $cgi->a({-href => href(action=>"commit",
6956                                                        hash=>$_)},
6957                                         esc_html(substr($_, 0, 7)));
6958                         } @$parents ) .
6959                         ')';
6960         }
6961         if (gitweb_check_feature('patches') && @$parents <= 1) {
6962                 $formats_nav .= " | " .
6963                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6964                                 "patch");
6965         }
6966
6967         if (!defined $parent) {
6968                 $parent = "--root";
6969         }
6970         my @difftree;
6971         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6972                 @diff_opts,
6973                 (@$parents <= 1 ? $parent : '-c'),
6974                 $hash, "--"
6975                 or die_error(500, "Open git-diff-tree failed");
6976         @difftree = map { chomp; $_ } <$fd>;
6977         close $fd or die_error(404, "Reading git-diff-tree failed");
6978
6979         # non-textual hash id's can be cached
6980         my $expires;
6981         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6982                 $expires = "+1d";
6983         }
6984         my $refs = git_get_references();
6985         my $ref = format_ref_marker($refs, $co{'id'});
6986
6987         git_header_html(undef, $expires);
6988         git_print_page_nav('commit', '',
6989                            $hash, $co{'tree'}, $hash,
6990                            $formats_nav);
6991
6992         if (defined $co{'parent'}) {
6993                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6994         } else {
6995                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6996         }
6997         print "<div class=\"title_text\">\n" .
6998               "<table class=\"object_header\">\n";
6999         git_print_authorship_rows(\%co);
7000         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7001         print "<tr>" .
7002               "<td>tree</td>" .
7003               "<td class=\"sha1\">" .
7004               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7005                        class => "list"}, $co{'tree'}) .
7006               "</td>" .
7007               "<td class=\"link\">" .
7008               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7009                       "tree");
7010         my $snapshot_links = format_snapshot_links($hash);
7011         if (defined $snapshot_links) {
7012                 print " | " . $snapshot_links;
7013         }
7014         print "</td>" .
7015               "</tr>\n";
7016
7017         foreach my $par (@$parents) {
7018                 print "<tr>" .
7019                       "<td>parent</td>" .
7020                       "<td class=\"sha1\">" .
7021                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7022                                class => "list"}, $par) .
7023                       "</td>" .
7024                       "<td class=\"link\">" .
7025                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7026                       " | " .
7027                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7028                       "</td>" .
7029                       "</tr>\n";
7030         }
7031         print "</table>".
7032               "</div>\n";
7033
7034         print "<div class=\"page_body\">\n";
7035         git_print_log($co{'comment'});
7036         print "</div>\n";
7037
7038         git_difftree_body(\@difftree, $hash, @$parents);
7039
7040         git_footer_html();
7041 }
7042
7043 sub git_object {
7044         # object is defined by:
7045         # - hash or hash_base alone
7046         # - hash_base and file_name
7047         my $type;
7048
7049         # - hash or hash_base alone
7050         if ($hash || ($hash_base && !defined $file_name)) {
7051                 my $object_id = $hash || $hash_base;
7052
7053                 open my $fd, "-|", quote_command(
7054                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7055                         or die_error(404, "Object does not exist");
7056                 $type = <$fd>;
7057                 chomp $type;
7058                 close $fd
7059                         or die_error(404, "Object does not exist");
7060
7061         # - hash_base and file_name
7062         } elsif ($hash_base && defined $file_name) {
7063                 $file_name =~ s,/+$,,;
7064
7065                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7066                         or die_error(404, "Base object does not exist");
7067
7068                 # here errors should not hapen
7069                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7070                         or die_error(500, "Open git-ls-tree failed");
7071                 my $line = <$fd>;
7072                 close $fd;
7073
7074                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7075                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7076                         die_error(404, "File or directory for given base does not exist");
7077                 }
7078                 $type = $2;
7079                 $hash = $3;
7080         } else {
7081                 die_error(400, "Not enough information to find object");
7082         }
7083
7084         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7085                                           hash=>$hash, hash_base=>$hash_base,
7086                                           file_name=>$file_name),
7087                              -status => '302 Found');
7088 }
7089
7090 sub git_blobdiff {
7091         my $format = shift || 'html';
7092         my $diff_style = $input_params{'diff_style'} || 'inline';
7093
7094         my $fd;
7095         my @difftree;
7096         my %diffinfo;
7097         my $expires;
7098
7099         # preparing $fd and %diffinfo for git_patchset_body
7100         # new style URI
7101         if (defined $hash_base && defined $hash_parent_base) {
7102                 if (defined $file_name) {
7103                         # read raw output
7104                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7105                                 $hash_parent_base, $hash_base,
7106                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7107                                 or die_error(500, "Open git-diff-tree failed");
7108                         @difftree = map { chomp; $_ } <$fd>;
7109                         close $fd
7110                                 or die_error(404, "Reading git-diff-tree failed");
7111                         @difftree
7112                                 or die_error(404, "Blob diff not found");
7113
7114                 } elsif (defined $hash &&
7115                          $hash =~ /[0-9a-fA-F]{40}/) {
7116                         # try to find filename from $hash
7117
7118                         # read filtered raw output
7119                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7120                                 $hash_parent_base, $hash_base, "--"
7121                                 or die_error(500, "Open git-diff-tree failed");
7122                         @difftree =
7123                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7124                                 # $hash == to_id
7125                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7126                                 map { chomp; $_ } <$fd>;
7127                         close $fd
7128                                 or die_error(404, "Reading git-diff-tree failed");
7129                         @difftree
7130                                 or die_error(404, "Blob diff not found");
7131
7132                 } else {
7133                         die_error(400, "Missing one of the blob diff parameters");
7134                 }
7135
7136                 if (@difftree > 1) {
7137                         die_error(400, "Ambiguous blob diff specification");
7138                 }
7139
7140                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7141                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7142                 $file_name   ||= $diffinfo{'to_file'};
7143
7144                 $hash_parent ||= $diffinfo{'from_id'};
7145                 $hash        ||= $diffinfo{'to_id'};
7146
7147                 # non-textual hash id's can be cached
7148                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7149                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7150                         $expires = '+1d';
7151                 }
7152
7153                 # open patch output
7154                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7155                         '-p', ($format eq 'html' ? "--full-index" : ()),
7156                         $hash_parent_base, $hash_base,
7157                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7158                         or die_error(500, "Open git-diff-tree failed");
7159         }
7160
7161         # old/legacy style URI -- not generated anymore since 1.4.3.
7162         if (!%diffinfo) {
7163                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7164         }
7165
7166         # header
7167         if ($format eq 'html') {
7168                 my $formats_nav =
7169                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7170                                 "raw");
7171                 $formats_nav .= diff_style_nav($diff_style);
7172                 git_header_html(undef, $expires);
7173                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7174                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7175                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7176                 } else {
7177                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7178                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7179                 }
7180                 if (defined $file_name) {
7181                         git_print_page_path($file_name, "blob", $hash_base);
7182                 } else {
7183                         print "<div class=\"page_path\"></div>\n";
7184                 }
7185
7186         } elsif ($format eq 'plain') {
7187                 print $cgi->header(
7188                         -type => 'text/plain',
7189                         -charset => 'utf-8',
7190                         -expires => $expires,
7191                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7192
7193                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7194
7195         } else {
7196                 die_error(400, "Unknown blobdiff format");
7197         }
7198
7199         # patch
7200         if ($format eq 'html') {
7201                 print "<div class=\"page_body\">\n";
7202
7203                 git_patchset_body($fd, $diff_style,
7204                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7205                 close $fd;
7206
7207                 print "</div>\n"; # class="page_body"
7208                 git_footer_html();
7209
7210         } else {
7211                 while (my $line = <$fd>) {
7212                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7213                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7214
7215                         print $line;
7216
7217                         last if $line =~ m!^\+\+\+!;
7218                 }
7219                 local $/ = undef;
7220                 print <$fd>;
7221                 close $fd;
7222         }
7223 }
7224
7225 sub git_blobdiff_plain {
7226         git_blobdiff('plain');
7227 }
7228
7229 # assumes that it is added as later part of already existing navigation,
7230 # so it returns "| foo | bar" rather than just "foo | bar"
7231 sub diff_style_nav {
7232         my ($diff_style, $is_combined) = @_;
7233         $diff_style ||= 'inline';
7234
7235         return "" if ($is_combined);
7236
7237         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7238         my %styles = @styles;
7239         @styles =
7240                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7241
7242         return join '',
7243                 map { " | ".$_ }
7244                 map {
7245                         $_ eq $diff_style ? $styles{$_} :
7246                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7247                 } @styles;
7248 }
7249
7250 sub git_commitdiff {
7251         my %params = @_;
7252         my $format = $params{-format} || 'html';
7253         my $diff_style = $input_params{'diff_style'} || 'inline';
7254
7255         my ($patch_max) = gitweb_get_feature('patches');
7256         if ($format eq 'patch') {
7257                 die_error(403, "Patch view not allowed") unless $patch_max;
7258         }
7259
7260         $hash ||= $hash_base || "HEAD";
7261         my %co = parse_commit($hash)
7262             or die_error(404, "Unknown commit object");
7263
7264         # choose format for commitdiff for merge
7265         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7266                 $hash_parent = '--cc';
7267         }
7268         # we need to prepare $formats_nav before almost any parameter munging
7269         my $formats_nav;
7270         if ($format eq 'html') {
7271                 $formats_nav =
7272                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7273                                 "raw");
7274                 if ($patch_max && @{$co{'parents'}} <= 1) {
7275                         $formats_nav .= " | " .
7276                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7277                                         "patch");
7278                 }
7279                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7280
7281                 if (defined $hash_parent &&
7282                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7283                         # commitdiff with two commits given
7284                         my $hash_parent_short = $hash_parent;
7285                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7286                                 $hash_parent_short = substr($hash_parent, 0, 7);
7287                         }
7288                         $formats_nav .=
7289                                 ' (from';
7290                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7291                                 if ($co{'parents'}[$i] eq $hash_parent) {
7292                                         $formats_nav .= ' parent ' . ($i+1);
7293                                         last;
7294                                 }
7295                         }
7296                         $formats_nav .= ': ' .
7297                                 $cgi->a({-href => href(-replay=>1,
7298                                                        hash=>$hash_parent, hash_base=>undef)},
7299                                         esc_html($hash_parent_short)) .
7300                                 ')';
7301                 } elsif (!$co{'parent'}) {
7302                         # --root commitdiff
7303                         $formats_nav .= ' (initial)';
7304                 } elsif (scalar @{$co{'parents'}} == 1) {
7305                         # single parent commit
7306                         $formats_nav .=
7307                                 ' (parent: ' .
7308                                 $cgi->a({-href => href(-replay=>1,
7309                                                        hash=>$co{'parent'}, hash_base=>undef)},
7310                                         esc_html(substr($co{'parent'}, 0, 7))) .
7311                                 ')';
7312                 } else {
7313                         # merge commit
7314                         if ($hash_parent eq '--cc') {
7315                                 $formats_nav .= ' | ' .
7316                                         $cgi->a({-href => href(-replay=>1,
7317                                                                hash=>$hash, hash_parent=>'-c')},
7318                                                 'combined');
7319                         } else { # $hash_parent eq '-c'
7320                                 $formats_nav .= ' | ' .
7321                                         $cgi->a({-href => href(-replay=>1,
7322                                                                hash=>$hash, hash_parent=>'--cc')},
7323                                                 'compact');
7324                         }
7325                         $formats_nav .=
7326                                 ' (merge: ' .
7327                                 join(' ', map {
7328                                         $cgi->a({-href => href(-replay=>1,
7329                                                                hash=>$_, hash_base=>undef)},
7330                                                 esc_html(substr($_, 0, 7)));
7331                                 } @{$co{'parents'}} ) .
7332                                 ')';
7333                 }
7334         }
7335
7336         my $hash_parent_param = $hash_parent;
7337         if (!defined $hash_parent_param) {
7338                 # --cc for multiple parents, --root for parentless
7339                 $hash_parent_param =
7340                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7341         }
7342
7343         # read commitdiff
7344         my $fd;
7345         my @difftree;
7346         if ($format eq 'html') {
7347                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7348                         "--no-commit-id", "--patch-with-raw", "--full-index",
7349                         $hash_parent_param, $hash, "--"
7350                         or die_error(500, "Open git-diff-tree failed");
7351
7352                 while (my $line = <$fd>) {
7353                         chomp $line;
7354                         # empty line ends raw part of diff-tree output
7355                         last unless $line;
7356                         push @difftree, scalar parse_difftree_raw_line($line);
7357                 }
7358
7359         } elsif ($format eq 'plain') {
7360                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7361                         '-p', $hash_parent_param, $hash, "--"
7362                         or die_error(500, "Open git-diff-tree failed");
7363         } elsif ($format eq 'patch') {
7364                 # For commit ranges, we limit the output to the number of
7365                 # patches specified in the 'patches' feature.
7366                 # For single commits, we limit the output to a single patch,
7367                 # diverging from the git-format-patch default.
7368                 my @commit_spec = ();
7369                 if ($hash_parent) {
7370                         if ($patch_max > 0) {
7371                                 push @commit_spec, "-$patch_max";
7372                         }
7373                         push @commit_spec, '-n', "$hash_parent..$hash";
7374                 } else {
7375                         if ($params{-single}) {
7376                                 push @commit_spec, '-1';
7377                         } else {
7378                                 if ($patch_max > 0) {
7379                                         push @commit_spec, "-$patch_max";
7380                                 }
7381                                 push @commit_spec, "-n";
7382                         }
7383                         push @commit_spec, '--root', $hash;
7384                 }
7385                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7386                         '--encoding=utf8', '--stdout', @commit_spec
7387                         or die_error(500, "Open git-format-patch failed");
7388         } else {
7389                 die_error(400, "Unknown commitdiff format");
7390         }
7391
7392         # non-textual hash id's can be cached
7393         my $expires;
7394         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7395                 $expires = "+1d";
7396         }
7397
7398         # write commit message
7399         if ($format eq 'html') {
7400                 my $refs = git_get_references();
7401                 my $ref = format_ref_marker($refs, $co{'id'});
7402
7403                 git_header_html(undef, $expires);
7404                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7405                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7406                 print "<div class=\"title_text\">\n" .
7407                       "<table class=\"object_header\">\n";
7408                 git_print_authorship_rows(\%co);
7409                 print "</table>".
7410                       "</div>\n";
7411                 print "<div class=\"page_body\">\n";
7412                 if (@{$co{'comment'}} > 1) {
7413                         print "<div class=\"log\">\n";
7414                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7415                         print "</div>\n"; # class="log"
7416                 }
7417
7418         } elsif ($format eq 'plain') {
7419                 my $refs = git_get_references("tags");
7420                 my $tagname = git_get_rev_name_tags($hash);
7421                 my $filename = basename($project) . "-$hash.patch";
7422
7423                 print $cgi->header(
7424                         -type => 'text/plain',
7425                         -charset => 'utf-8',
7426                         -expires => $expires,
7427                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7428                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7429                 print "From: " . to_utf8($co{'author'}) . "\n";
7430                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7431                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7432
7433                 print "X-Git-Tag: $tagname\n" if $tagname;
7434                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7435
7436                 foreach my $line (@{$co{'comment'}}) {
7437                         print to_utf8($line) . "\n";
7438                 }
7439                 print "---\n\n";
7440         } elsif ($format eq 'patch') {
7441                 my $filename = basename($project) . "-$hash.patch";
7442
7443                 print $cgi->header(
7444                         -type => 'text/plain',
7445                         -charset => 'utf-8',
7446                         -expires => $expires,
7447                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7448         }
7449
7450         # write patch
7451         if ($format eq 'html') {
7452                 my $use_parents = !defined $hash_parent ||
7453                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7454                 git_difftree_body(\@difftree, $hash,
7455                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7456                 print "<br/>\n";
7457
7458                 git_patchset_body($fd, $diff_style,
7459                                   \@difftree, $hash,
7460                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7461                 close $fd;
7462                 print "</div>\n"; # class="page_body"
7463                 git_footer_html();
7464
7465         } elsif ($format eq 'plain') {
7466                 local $/ = undef;
7467                 print <$fd>;
7468                 close $fd
7469                         or print "Reading git-diff-tree failed\n";
7470         } elsif ($format eq 'patch') {
7471                 local $/ = undef;
7472                 print <$fd>;
7473                 close $fd
7474                         or print "Reading git-format-patch failed\n";
7475         }
7476 }
7477
7478 sub git_commitdiff_plain {
7479         git_commitdiff(-format => 'plain');
7480 }
7481
7482 # format-patch-style patches
7483 sub git_patch {
7484         git_commitdiff(-format => 'patch', -single => 1);
7485 }
7486
7487 sub git_patches {
7488         git_commitdiff(-format => 'patch');
7489 }
7490
7491 sub git_history {
7492         git_log_generic('history', \&git_history_body,
7493                         $hash_base, $hash_parent_base,
7494                         $file_name, $hash);
7495 }
7496
7497 sub git_search {
7498         $searchtype ||= 'commit';
7499
7500         # check if appropriate features are enabled
7501         gitweb_check_feature('search')
7502                 or die_error(403, "Search is disabled");
7503         if ($searchtype eq 'pickaxe') {
7504                 # pickaxe may take all resources of your box and run for several minutes
7505                 # with every query - so decide by yourself how public you make this feature
7506                 gitweb_check_feature('pickaxe')
7507                         or die_error(403, "Pickaxe search is disabled");
7508         }
7509         if ($searchtype eq 'grep') {
7510                 # grep search might be potentially CPU-intensive, too
7511                 gitweb_check_feature('grep')
7512                         or die_error(403, "Grep search is disabled");
7513         }
7514
7515         if (!defined $searchtext) {
7516                 die_error(400, "Text field is empty");
7517         }
7518         if (!defined $hash) {
7519                 $hash = git_get_head_hash($project);
7520         }
7521         my %co = parse_commit($hash);
7522         if (!%co) {
7523                 die_error(404, "Unknown commit object");
7524         }
7525         if (!defined $page) {
7526                 $page = 0;
7527         }
7528
7529         if ($searchtype eq 'commit' ||
7530             $searchtype eq 'author' ||
7531             $searchtype eq 'committer') {
7532                 git_search_message(%co);
7533         } elsif ($searchtype eq 'pickaxe') {
7534                 git_search_changes(%co);
7535         } elsif ($searchtype eq 'grep') {
7536                 git_search_files(%co);
7537         } else {
7538                 die_error(400, "Unknown search type");
7539         }
7540 }
7541
7542 sub git_search_help {
7543         git_header_html();
7544         git_print_page_nav('','', $hash,$hash,$hash);
7545         print <<EOT;
7546 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7547 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7548 the pattern entered is recognized as the POSIX extended
7549 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7550 insensitive).</p>
7551 <dl>
7552 <dt><b>commit</b></dt>
7553 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7554 EOT
7555         my $have_grep = gitweb_check_feature('grep');
7556         if ($have_grep) {
7557                 print <<EOT;
7558 <dt><b>grep</b></dt>
7559 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7560     a different one) are searched for the given pattern. On large trees, this search can take
7561 a while and put some strain on the server, so please use it with some consideration. Note that
7562 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7563 case-sensitive.</dd>
7564 EOT
7565         }
7566         print <<EOT;
7567 <dt><b>author</b></dt>
7568 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7569 <dt><b>committer</b></dt>
7570 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7571 EOT
7572         my $have_pickaxe = gitweb_check_feature('pickaxe');
7573         if ($have_pickaxe) {
7574                 print <<EOT;
7575 <dt><b>pickaxe</b></dt>
7576 <dd>All commits that caused the string to appear or disappear from any file (changes that
7577 added, removed or "modified" the string) will be listed. This search can take a while and
7578 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7579 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7580 EOT
7581         }
7582         print "</dl>\n";
7583         git_footer_html();
7584 }
7585
7586 sub git_shortlog {
7587         git_log_generic('shortlog', \&git_shortlog_body,
7588                         $hash, $hash_parent);
7589 }
7590
7591 ## ......................................................................
7592 ## feeds (RSS, Atom; OPML)
7593
7594 sub git_feed {
7595         my $format = shift || 'atom';
7596         my $have_blame = gitweb_check_feature('blame');
7597
7598         # Atom: http://www.atomenabled.org/developers/syndication/
7599         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7600         if ($format ne 'rss' && $format ne 'atom') {
7601                 die_error(400, "Unknown web feed format");
7602         }
7603
7604         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7605         my $head = $hash || 'HEAD';
7606         my @commitlist = parse_commits($head, 150, 0, $file_name);
7607
7608         my %latest_commit;
7609         my %latest_date;
7610         my $content_type = "application/$format+xml";
7611         if (defined $cgi->http('HTTP_ACCEPT') &&
7612                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7613                 # browser (feed reader) prefers text/xml
7614                 $content_type = 'text/xml';
7615         }
7616         if (defined($commitlist[0])) {
7617                 %latest_commit = %{$commitlist[0]};
7618                 my $latest_epoch = $latest_commit{'committer_epoch'};
7619                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7620                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7621                 if (defined $if_modified) {
7622                         my $since;
7623                         if (eval { require HTTP::Date; 1; }) {
7624                                 $since = HTTP::Date::str2time($if_modified);
7625                         } elsif (eval { require Time::ParseDate; 1; }) {
7626                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7627                         }
7628                         if (defined $since && $latest_epoch <= $since) {
7629                                 print $cgi->header(
7630                                         -type => $content_type,
7631                                         -charset => 'utf-8',
7632                                         -last_modified => $latest_date{'rfc2822'},
7633                                         -status => '304 Not Modified');
7634                                 return;
7635                         }
7636                 }
7637                 print $cgi->header(
7638                         -type => $content_type,
7639                         -charset => 'utf-8',
7640                         -last_modified => $latest_date{'rfc2822'});
7641         } else {
7642                 print $cgi->header(
7643                         -type => $content_type,
7644                         -charset => 'utf-8');
7645         }
7646
7647         # Optimization: skip generating the body if client asks only
7648         # for Last-Modified date.
7649         return if ($cgi->request_method() eq 'HEAD');
7650
7651         # header variables
7652         my $title = "$site_name - $project/$action";
7653         my $feed_type = 'log';
7654         if (defined $hash) {
7655                 $title .= " - '$hash'";
7656                 $feed_type = 'branch log';
7657                 if (defined $file_name) {
7658                         $title .= " :: $file_name";
7659                         $feed_type = 'history';
7660                 }
7661         } elsif (defined $file_name) {
7662                 $title .= " - $file_name";
7663                 $feed_type = 'history';
7664         }
7665         $title .= " $feed_type";
7666         my $descr = git_get_project_description($project);
7667         if (defined $descr) {
7668                 $descr = esc_html($descr);
7669         } else {
7670                 $descr = "$project " .
7671                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7672                          " feed";
7673         }
7674         my $owner = git_get_project_owner($project);
7675         $owner = esc_html($owner);
7676
7677         #header
7678         my $alt_url;
7679         if (defined $file_name) {
7680                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7681         } elsif (defined $hash) {
7682                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7683         } else {
7684                 $alt_url = href(-full=>1, action=>"summary");
7685         }
7686         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7687         if ($format eq 'rss') {
7688                 print <<XML;
7689 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7690 <channel>
7691 XML
7692                 print "<title>$title</title>\n" .
7693                       "<link>$alt_url</link>\n" .
7694                       "<description>$descr</description>\n" .
7695                       "<language>en</language>\n" .
7696                       # project owner is responsible for 'editorial' content
7697                       "<managingEditor>$owner</managingEditor>\n";
7698                 if (defined $logo || defined $favicon) {
7699                         # prefer the logo to the favicon, since RSS
7700                         # doesn't allow both
7701                         my $img = esc_url($logo || $favicon);
7702                         print "<image>\n" .
7703                               "<url>$img</url>\n" .
7704                               "<title>$title</title>\n" .
7705                               "<link>$alt_url</link>\n" .
7706                               "</image>\n";
7707                 }
7708                 if (%latest_date) {
7709                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7710                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7711                 }
7712                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7713         } elsif ($format eq 'atom') {
7714                 print <<XML;
7715 <feed xmlns="http://www.w3.org/2005/Atom">
7716 XML
7717                 print "<title>$title</title>\n" .
7718                       "<subtitle>$descr</subtitle>\n" .
7719                       '<link rel="alternate" type="text/html" href="' .
7720                       $alt_url . '" />' . "\n" .
7721                       '<link rel="self" type="' . $content_type . '" href="' .
7722                       $cgi->self_url() . '" />' . "\n" .
7723                       "<id>" . href(-full=>1) . "</id>\n" .
7724                       # use project owner for feed author
7725                       "<author><name>$owner</name></author>\n";
7726                 if (defined $favicon) {
7727                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7728                 }
7729                 if (defined $logo) {
7730                         # not twice as wide as tall: 72 x 27 pixels
7731                         print "<logo>" . esc_url($logo) . "</logo>\n";
7732                 }
7733                 if (! %latest_date) {
7734                         # dummy date to keep the feed valid until commits trickle in:
7735                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7736                 } else {
7737                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7738                 }
7739                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7740         }
7741
7742         # contents
7743         for (my $i = 0; $i <= $#commitlist; $i++) {
7744                 my %co = %{$commitlist[$i]};
7745                 my $commit = $co{'id'};
7746                 # we read 150, we always show 30 and the ones more recent than 48 hours
7747                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7748                         last;
7749                 }
7750                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7751
7752                 # get list of changed files
7753                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7754                         $co{'parent'} || "--root",
7755                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7756                         or next;
7757                 my @difftree = map { chomp; $_ } <$fd>;
7758                 close $fd
7759                         or next;
7760
7761                 # print element (entry, item)
7762                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7763                 if ($format eq 'rss') {
7764                         print "<item>\n" .
7765                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7766                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7767                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7768                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7769                               "<link>$co_url</link>\n" .
7770                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7771                               "<content:encoded>" .
7772                               "<![CDATA[\n";
7773                 } elsif ($format eq 'atom') {
7774                         print "<entry>\n" .
7775                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7776                               "<updated>$cd{'iso-8601'}</updated>\n" .
7777                               "<author>\n" .
7778                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7779                         if ($co{'author_email'}) {
7780                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7781                         }
7782                         print "</author>\n" .
7783                               # use committer for contributor
7784                               "<contributor>\n" .
7785                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7786                         if ($co{'committer_email'}) {
7787                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7788                         }
7789                         print "</contributor>\n" .
7790                               "<published>$cd{'iso-8601'}</published>\n" .
7791                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7792                               "<id>$co_url</id>\n" .
7793                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7794                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7795                 }
7796                 my $comment = $co{'comment'};
7797                 print "<pre>\n";
7798                 foreach my $line (@$comment) {
7799                         $line = esc_html($line);
7800                         print "$line\n";
7801                 }
7802                 print "</pre><ul>\n";
7803                 foreach my $difftree_line (@difftree) {
7804                         my %difftree = parse_difftree_raw_line($difftree_line);
7805                         next if !$difftree{'from_id'};
7806
7807                         my $file = $difftree{'file'} || $difftree{'to_file'};
7808
7809                         print "<li>" .
7810                               "[" .
7811                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7812                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7813                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7814                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7815                                       -title => "diff"}, 'D');
7816                         if ($have_blame) {
7817                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7818                                                              file_name=>$file, hash_base=>$commit),
7819                                               -title => "blame"}, 'B');
7820                         }
7821                         # if this is not a feed of a file history
7822                         if (!defined $file_name || $file_name ne $file) {
7823                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7824                                                              file_name=>$file, hash=>$commit),
7825                                               -title => "history"}, 'H');
7826                         }
7827                         $file = esc_path($file);
7828                         print "] ".
7829                               "$file</li>\n";
7830                 }
7831                 if ($format eq 'rss') {
7832                         print "</ul>]]>\n" .
7833                               "</content:encoded>\n" .
7834                               "</item>\n";
7835                 } elsif ($format eq 'atom') {
7836                         print "</ul>\n</div>\n" .
7837                               "</content>\n" .
7838                               "</entry>\n";
7839                 }
7840         }
7841
7842         # end of feed
7843         if ($format eq 'rss') {
7844                 print "</channel>\n</rss>\n";
7845         } elsif ($format eq 'atom') {
7846                 print "</feed>\n";
7847         }
7848 }
7849
7850 sub git_rss {
7851         git_feed('rss');
7852 }
7853
7854 sub git_atom {
7855         git_feed('atom');
7856 }
7857
7858 sub git_opml {
7859         my @list = git_get_projects_list();
7860         if (!@list) {
7861                 die_error(404, "No projects found");
7862         }
7863
7864         print $cgi->header(
7865                 -type => 'text/xml',
7866                 -charset => 'utf-8',
7867                 -content_disposition => 'inline; filename="opml.xml"');
7868
7869         my $title = esc_html($site_name);
7870         print <<XML;
7871 <?xml version="1.0" encoding="utf-8"?>
7872 <opml version="1.0">
7873 <head>
7874   <title>$title OPML Export</title>
7875 </head>
7876 <body>
7877 <outline text="git RSS feeds">
7878 XML
7879
7880         foreach my $pr (@list) {
7881                 my %proj = %$pr;
7882                 my $head = git_get_head_hash($proj{'path'});
7883                 if (!defined $head) {
7884                         next;
7885                 }
7886                 $git_dir = "$projectroot/$proj{'path'}";
7887                 my %co = parse_commit($head);
7888                 if (!%co) {
7889                         next;
7890                 }
7891
7892                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7893                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7894                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7895                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7896         }
7897         print <<XML;
7898 </outline>
7899 </body>
7900 </opml>
7901 XML
7902 }