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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         project_filter => "pf",
 764         # this must be last entry (for manipulation from JavaScript)
 765         javascript => "js"
 766 );
 767 our %cgi_param_mapping = @cgi_param_mapping;
 768
 769 # we will also need to know the possible actions, for validation
 770 our %actions = (
 771         "blame" => \&git_blame,
 772         "blame_incremental" => \&git_blame_incremental,
 773         "blame_data" => \&git_blame_data,
 774         "blobdiff" => \&git_blobdiff,
 775         "blobdiff_plain" => \&git_blobdiff_plain,
 776         "blob" => \&git_blob,
 777         "blob_plain" => \&git_blob_plain,
 778         "commitdiff" => \&git_commitdiff,
 779         "commitdiff_plain" => \&git_commitdiff_plain,
 780         "commit" => \&git_commit,
 781         "forks" => \&git_forks,
 782         "heads" => \&git_heads,
 783         "history" => \&git_history,
 784         "log" => \&git_log,
 785         "patch" => \&git_patch,
 786         "patches" => \&git_patches,
 787         "remotes" => \&git_remotes,
 788         "rss" => \&git_rss,
 789         "atom" => \&git_atom,
 790         "search" => \&git_search,
 791         "search_help" => \&git_search_help,
 792         "shortlog" => \&git_shortlog,
 793         "summary" => \&git_summary,
 794         "tag" => \&git_tag,
 795         "tags" => \&git_tags,
 796         "tree" => \&git_tree,
 797         "snapshot" => \&git_snapshot,
 798         "object" => \&git_object,
 799         # those below don't need $project
 800         "opml" => \&git_opml,
 801         "project_list" => \&git_project_list,
 802         "project_index" => \&git_project_index,
 803 );
 804
 805 # finally, we have the hash of allowed extra_options for the commands that
 806 # allow them
 807 our %allowed_options = (
 808         "--no-merges" => [ qw(rss atom log shortlog history) ],
 809 );
 810
 811 # fill %input_params with the CGI parameters. All values except for 'opt'
 812 # should be single values, but opt can be an array. We should probably
 813 # build an array of parameters that can be multi-valued, but since for the time
 814 # being it's only this one, we just single it out
 815 sub evaluate_query_params {
 816         our $cgi;
 817
 818         while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                 if ($symbol eq 'opt') {
 820                         $input_params{$name} = [ $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = $cgi->param($symbol);
 823                 }
 824         }
 825 }
 826
 827 # now read PATH_INFO and update the parameter list for missing parameters
 828 sub evaluate_path_info {
 829         return if defined $input_params{'project'};
 830         return if !$path_info;
 831         $path_info =~ s,^/+,,;
 832         return if !$path_info;
 833
 834         # find which part of PATH_INFO is project
 835         my $project = $path_info;
 836         $project =~ s,/+$,,;
 837         while ($project && !check_head_link("$projectroot/$project")) {
 838                 $project =~ s,/*[^/]*$,,;
 839         }
 840         return unless $project;
 841         $input_params{'project'} = $project;
 842
 843         # do not change any parameters if an action is given using the query string
 844         return if $input_params{'action'};
 845         $path_info =~ s,^\Q$project\E/*,,;
 846
 847         # next, check if we have an action
 848         my $action = $path_info;
 849         $action =~ s,/.*$,,;
 850         if (exists $actions{$action}) {
 851                 $path_info =~ s,^$action/*,,;
 852                 $input_params{'action'} = $action;
 853         }
 854
 855         # list of actions that want hash_base instead of hash, but can have no
 856         # pathname (f) parameter
 857         my @wants_base = (
 858                 'tree',
 859                 'history',
 860         );
 861
 862         # we want to catch, among others
 863         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864         my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867         # first, analyze the 'current' part
 868         if (defined $pathname) {
 869                 # we got "branch:filename" or "branch:dir/"
 870                 # we could use git_get_type(branch:pathname), but:
 871                 # - it needs $git_dir
 872                 # - it does a git() call
 873                 # - the convention of terminating directories with a slash
 874                 #   makes it superfluous
 875                 # - embedding the action in the PATH_INFO would make it even
 876                 #   more superfluous
 877                 $pathname =~ s,^/+,,;
 878                 if (!$pathname || substr($pathname, -1) eq "/") {
 879                         $input_params{'action'} ||= "tree";
 880                         $pathname =~ s,/$,,;
 881                 } else {
 882                         # the default action depends on whether we had parent info
 883                         # or not
 884                         if ($parentrefname) {
 885                                 $input_params{'action'} ||= "blobdiff_plain";
 886                         } else {
 887                                 $input_params{'action'} ||= "blob_plain";
 888                         }
 889                 }
 890                 $input_params{'hash_base'} ||= $refname;
 891                 $input_params{'file_name'} ||= $pathname;
 892         } elsif (defined $refname) {
 893                 # we got "branch". In this case we have to choose if we have to
 894                 # set hash or hash_base.
 895                 #
 896                 # Most of the actions without a pathname only want hash to be
 897                 # set, except for the ones specified in @wants_base that want
 898                 # hash_base instead. It should also be noted that hand-crafted
 899                 # links having 'history' as an action and no pathname or hash
 900                 # set will fail, but that happens regardless of PATH_INFO.
 901                 if (defined $parentrefname) {
 902                         # if there is parent let the default be 'shortlog' action
 903                         # (for http://git.example.com/repo.git/A..B links); if there
 904                         # is no parent, dispatch will detect type of object and set
 905                         # action appropriately if required (if action is not set)
 906                         $input_params{'action'} ||= "shortlog";
 907                 }
 908                 if ($input_params{'action'} &&
 909                     grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_base'} ||= $refname;
 911                 } else {
 912                         $input_params{'hash'} ||= $refname;
 913                 }
 914         }
 915
 916         # next, handle the 'parent' part, if present
 917         if (defined $parentrefname) {
 918                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                 # someproject/blobdiff/oldrev..newrev:/filename
 920                 if ($parentpathname) {
 921                         $parentpathname =~ s,^/+,,;
 922                         $parentpathname =~ s,/$,,;
 923                         $input_params{'file_parent'} ||= $parentpathname;
 924                 } else {
 925                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                 }
 927                 # we assume that hash_parent_base is wanted if a path was specified,
 928                 # or if the action wants hash_base instead of hash
 929                 if (defined $input_params{'file_parent'} ||
 930                         grep { $_ eq $input_params{'action'} } @wants_base) {
 931                         $input_params{'hash_parent_base'} ||= $parentrefname;
 932                 } else {
 933                         $input_params{'hash_parent'} ||= $parentrefname;
 934                 }
 935         }
 936
 937         # for the snapshot action, we allow URLs in the form
 938         # $project/snapshot/$hash.ext
 939         # where .ext determines the snapshot and gets removed from the
 940         # passed $refname to provide the $hash.
 941         #
 942         # To be able to tell that $refname includes the format extension, we
 943         # require the following two conditions to be satisfied:
 944         # - the hash input parameter MUST have been set from the $refname part
 945         #   of the URL (i.e. they must be equal)
 946         # - the snapshot format MUST NOT have been defined already (e.g. from
 947         #   CGI parameter sf)
 948         # It's also useless to try any matching unless $refname has a dot,
 949         # so we check for that too
 950         if (defined $input_params{'action'} &&
 951                 $input_params{'action'} eq 'snapshot' &&
 952                 defined $refname && index($refname, '.') != -1 &&
 953                 $refname eq $input_params{'hash'} &&
 954                 !defined $input_params{'snapshot_format'}) {
 955                 # We loop over the known snapshot formats, checking for
 956                 # extensions. Allowed extensions are both the defined suffix
 957                 # (which includes the initial dot already) and the snapshot
 958                 # format key itself, with a prepended dot
 959                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                         my $hash = $refname;
 961                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                 next;
 963                         }
 964                         my $sfx = $1;
 965                         # a valid suffix was found, so set the snapshot format
 966                         # and reset the hash parameter
 967                         $input_params{'snapshot_format'} = $fmt;
 968                         $input_params{'hash'} = $hash;
 969                         # we also set the format suffix to the one requested
 970                         # in the URL: this way a request for e.g. .tgz returns
 971                         # a .tgz instead of a .tar.gz
 972                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                         last;
 974                 }
 975         }
 976 }
 977
 978 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980      $searchtext, $search_regexp, $project_filter);
 981 sub evaluate_and_validate_params {
 982         our $action = $input_params{'action'};
 983         if (defined $action) {
 984                 if (!validate_action($action)) {
 985                         die_error(400, "Invalid action parameter");
 986                 }
 987         }
 988
 989         # parameters which are pathnames
 990         our $project = $input_params{'project'};
 991         if (defined $project) {
 992                 if (!validate_project($project)) {
 993                         undef $project;
 994                         die_error(404, "No such project");
 995                 }
 996         }
 997
 998         our $project_filter = $input_params{'project_filter'};
 999         if (defined $project_filter) {
1000                 if (!validate_pathname($project_filter)) {
1001                         die_error(404, "Invalid project_filter parameter");
1002                 }
1003         }
1004
1005         our $file_name = $input_params{'file_name'};
1006         if (defined $file_name) {
1007                 if (!validate_pathname($file_name)) {
1008                         die_error(400, "Invalid file parameter");
1009                 }
1010         }
1011
1012         our $file_parent = $input_params{'file_parent'};
1013         if (defined $file_parent) {
1014                 if (!validate_pathname($file_parent)) {
1015                         die_error(400, "Invalid file parent parameter");
1016                 }
1017         }
1018
1019         # parameters which are refnames
1020         our $hash = $input_params{'hash'};
1021         if (defined $hash) {
1022                 if (!validate_refname($hash)) {
1023                         die_error(400, "Invalid hash parameter");
1024                 }
1025         }
1026
1027         our $hash_parent = $input_params{'hash_parent'};
1028         if (defined $hash_parent) {
1029                 if (!validate_refname($hash_parent)) {
1030                         die_error(400, "Invalid hash parent parameter");
1031                 }
1032         }
1033
1034         our $hash_base = $input_params{'hash_base'};
1035         if (defined $hash_base) {
1036                 if (!validate_refname($hash_base)) {
1037                         die_error(400, "Invalid hash base parameter");
1038                 }
1039         }
1040
1041         our @extra_options = @{$input_params{'extra_options'}};
1042         # @extra_options is always defined, since it can only be (currently) set from
1043         # CGI, and $cgi->param() returns the empty array in array context if the param
1044         # is not set
1045         foreach my $opt (@extra_options) {
1046                 if (not exists $allowed_options{$opt}) {
1047                         die_error(400, "Invalid option parameter");
1048                 }
1049                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1050                         die_error(400, "Invalid option parameter for this action");
1051                 }
1052         }
1053
1054         our $hash_parent_base = $input_params{'hash_parent_base'};
1055         if (defined $hash_parent_base) {
1056                 if (!validate_refname($hash_parent_base)) {
1057                         die_error(400, "Invalid hash parent base parameter");
1058                 }
1059         }
1060
1061         # other parameters
1062         our $page = $input_params{'page'};
1063         if (defined $page) {
1064                 if ($page =~ m/[^0-9]/) {
1065                         die_error(400, "Invalid page parameter");
1066                 }
1067         }
1068
1069         our $searchtype = $input_params{'searchtype'};
1070         if (defined $searchtype) {
1071                 if ($searchtype =~ m/[^a-z]/) {
1072                         die_error(400, "Invalid searchtype parameter");
1073                 }
1074         }
1075
1076         our $search_use_regexp = $input_params{'search_use_regexp'};
1077
1078         our $searchtext = $input_params{'searchtext'};
1079         our $search_regexp;
1080         if (defined $searchtext) {
1081                 if (length($searchtext) < 2) {
1082                         die_error(403, "At least two characters are required for search parameter");
1083                 }
1084                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1085         }
1086 }
1087
1088 # path to the current git repository
1089 our $git_dir;
1090 sub evaluate_git_dir {
1091         our $git_dir = "$projectroot/$project" if $project;
1092 }
1093
1094 our (@snapshot_fmts, $git_avatar);
1095 sub configure_gitweb_features {
1096         # list of supported snapshot formats
1097         our @snapshot_fmts = gitweb_get_feature('snapshot');
1098         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1099
1100         # check that the avatar feature is set to a known provider name,
1101         # and for each provider check if the dependencies are satisfied.
1102         # if the provider name is invalid or the dependencies are not met,
1103         # reset $git_avatar to the empty string.
1104         our ($git_avatar) = gitweb_get_feature('avatar');
1105         if ($git_avatar eq 'gravatar') {
1106                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1107         } elsif ($git_avatar eq 'picon') {
1108                 # no dependencies
1109         } else {
1110                 $git_avatar = '';
1111         }
1112 }
1113
1114 # custom error handler: 'die <message>' is Internal Server Error
1115 sub handle_errors_html {
1116         my $msg = shift; # it is already HTML escaped
1117
1118         # to avoid infinite loop where error occurs in die_error,
1119         # change handler to default handler, disabling handle_errors_html
1120         set_message("Error occured when inside die_error:\n$msg");
1121
1122         # you cannot jump out of die_error when called as error handler;
1123         # the subroutine set via CGI::Carp::set_message is called _after_
1124         # HTTP headers are already written, so it cannot write them itself
1125         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1126 }
1127 set_message(\&handle_errors_html);
1128
1129 # dispatch
1130 sub dispatch {
1131         if (!defined $action) {
1132                 if (defined $hash) {
1133                         $action = git_get_type($hash);
1134                 } elsif (defined $hash_base && defined $file_name) {
1135                         $action = git_get_type("$hash_base:$file_name");
1136                 } elsif (defined $project) {
1137                         $action = 'summary';
1138                 } else {
1139                         $action = 'project_list';
1140                 }
1141         }
1142         if (!defined($actions{$action})) {
1143                 die_error(400, "Unknown action");
1144         }
1145         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1146             !$project) {
1147                 die_error(400, "Project needed");
1148         }
1149         $actions{$action}->();
1150 }
1151
1152 sub reset_timer {
1153         our $t0 = [ gettimeofday() ]
1154                 if defined $t0;
1155         our $number_of_git_cmds = 0;
1156 }
1157
1158 our $first_request = 1;
1159 sub run_request {
1160         reset_timer();
1161
1162         evaluate_uri();
1163         if ($first_request) {
1164                 evaluate_gitweb_config();
1165                 evaluate_git_version();
1166         }
1167         if ($per_request_config) {
1168                 if (ref($per_request_config) eq 'CODE') {
1169                         $per_request_config->();
1170                 } elsif (!$first_request) {
1171                         evaluate_gitweb_config();
1172                 }
1173         }
1174         check_loadavg();
1175
1176         # $projectroot and $projects_list might be set in gitweb config file
1177         $projects_list ||= $projectroot;
1178
1179         evaluate_query_params();
1180         evaluate_path_info();
1181         evaluate_and_validate_params();
1182         evaluate_git_dir();
1183
1184         configure_gitweb_features();
1185
1186         dispatch();
1187 }
1188
1189 our $is_last_request = sub { 1 };
1190 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1191 our $CGI = 'CGI';
1192 our $cgi;
1193 sub configure_as_fcgi {
1194         require CGI::Fast;
1195         our $CGI = 'CGI::Fast';
1196
1197         my $request_number = 0;
1198         # let each child service 100 requests
1199         our $is_last_request = sub { ++$request_number > 100 };
1200 }
1201 sub evaluate_argv {
1202         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1203         configure_as_fcgi()
1204                 if $script_name =~ /\.fcgi$/;
1205
1206         return unless (@ARGV);
1207
1208         require Getopt::Long;
1209         Getopt::Long::GetOptions(
1210                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1211                 'nproc|n=i' => sub {
1212                         my ($arg, $val) = @_;
1213                         return unless eval { require FCGI::ProcManager; 1; };
1214                         my $proc_manager = FCGI::ProcManager->new({
1215                                 n_processes => $val,
1216                         });
1217                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1218                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1219                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1220                 },
1221         );
1222 }
1223
1224 sub run {
1225         evaluate_argv();
1226
1227         $first_request = 1;
1228         $pre_listen_hook->()
1229                 if $pre_listen_hook;
1230
1231  REQUEST:
1232         while ($cgi = $CGI->new()) {
1233                 $pre_dispatch_hook->()
1234                         if $pre_dispatch_hook;
1235
1236                 run_request();
1237
1238                 $post_dispatch_hook->()
1239                         if $post_dispatch_hook;
1240                 $first_request = 0;
1241
1242                 last REQUEST if ($is_last_request->());
1243         }
1244
1245  DONE_GITWEB:
1246         1;
1247 }
1248
1249 run();
1250
1251 if (defined caller) {
1252         # wrapped in a subroutine processing requests,
1253         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1254         return;
1255 } else {
1256         # pure CGI script, serving single request
1257         exit;
1258 }
1259
1260 ## ======================================================================
1261 ## action links
1262
1263 # possible values of extra options
1264 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1265 # -replay => 1      - start from a current view (replay with modifications)
1266 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1267 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1268 sub href {
1269         my %params = @_;
1270         # default is to use -absolute url() i.e. $my_uri
1271         my $href = $params{-full} ? $my_url : $my_uri;
1272
1273         # implicit -replay, must be first of implicit params
1274         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1275
1276         $params{'project'} = $project unless exists $params{'project'};
1277
1278         if ($params{-replay}) {
1279                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1280                         if (!exists $params{$name}) {
1281                                 $params{$name} = $input_params{$name};
1282                         }
1283                 }
1284         }
1285
1286         my $use_pathinfo = gitweb_check_feature('pathinfo');
1287         if (defined $params{'project'} &&
1288             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1289                 # try to put as many parameters as possible in PATH_INFO:
1290                 #   - project name
1291                 #   - action
1292                 #   - hash_parent or hash_parent_base:/file_parent
1293                 #   - hash or hash_base:/filename
1294                 #   - the snapshot_format as an appropriate suffix
1295
1296                 # When the script is the root DirectoryIndex for the domain,
1297                 # $href here would be something like http://gitweb.example.com/
1298                 # Thus, we strip any trailing / from $href, to spare us double
1299                 # slashes in the final URL
1300                 $href =~ s,/$,,;
1301
1302                 # Then add the project name, if present
1303                 $href .= "/".esc_path_info($params{'project'});
1304                 delete $params{'project'};
1305
1306                 # since we destructively absorb parameters, we keep this
1307                 # boolean that remembers if we're handling a snapshot
1308                 my $is_snapshot = $params{'action'} eq 'snapshot';
1309
1310                 # Summary just uses the project path URL, any other action is
1311                 # added to the URL
1312                 if (defined $params{'action'}) {
1313                         $href .= "/".esc_path_info($params{'action'})
1314                                 unless $params{'action'} eq 'summary';
1315                         delete $params{'action'};
1316                 }
1317
1318                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1319                 # stripping nonexistent or useless pieces
1320                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1321                         || $params{'hash_parent'} || $params{'hash'});
1322                 if (defined $params{'hash_base'}) {
1323                         if (defined $params{'hash_parent_base'}) {
1324                                 $href .= esc_path_info($params{'hash_parent_base'});
1325                                 # skip the file_parent if it's the same as the file_name
1326                                 if (defined $params{'file_parent'}) {
1327                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1328                                                 delete $params{'file_parent'};
1329                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1330                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1331                                                 delete $params{'file_parent'};
1332                                         }
1333                                 }
1334                                 $href .= "..";
1335                                 delete $params{'hash_parent'};
1336                                 delete $params{'hash_parent_base'};
1337                         } elsif (defined $params{'hash_parent'}) {
1338                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1339                                 delete $params{'hash_parent'};
1340                         }
1341
1342                         $href .= esc_path_info($params{'hash_base'});
1343                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1344                                 $href .= ":/".esc_path_info($params{'file_name'});
1345                                 delete $params{'file_name'};
1346                         }
1347                         delete $params{'hash'};
1348                         delete $params{'hash_base'};
1349                 } elsif (defined $params{'hash'}) {
1350                         $href .= esc_path_info($params{'hash'});
1351                         delete $params{'hash'};
1352                 }
1353
1354                 # If the action was a snapshot, we can absorb the
1355                 # snapshot_format parameter too
1356                 if ($is_snapshot) {
1357                         my $fmt = $params{'snapshot_format'};
1358                         # snapshot_format should always be defined when href()
1359                         # is called, but just in case some code forgets, we
1360                         # fall back to the default
1361                         $fmt ||= $snapshot_fmts[0];
1362                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1363                         delete $params{'snapshot_format'};
1364                 }
1365         }
1366
1367         # now encode the parameters explicitly
1368         my @result = ();
1369         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1370                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1371                 if (defined $params{$name}) {
1372                         if (ref($params{$name}) eq "ARRAY") {
1373                                 foreach my $par (@{$params{$name}}) {
1374                                         push @result, $symbol . "=" . esc_param($par);
1375                                 }
1376                         } else {
1377                                 push @result, $symbol . "=" . esc_param($params{$name});
1378                         }
1379                 }
1380         }
1381         $href .= "?" . join(';', @result) if scalar @result;
1382
1383         # final transformation: trailing spaces must be escaped (URI-encoded)
1384         $href =~ s/(\s+)$/CGI::escape($1)/e;
1385
1386         if ($params{-anchor}) {
1387                 $href .= "#".esc_param($params{-anchor});
1388         }
1389
1390         return $href;
1391 }
1392
1393
1394 ## ======================================================================
1395 ## validation, quoting/unquoting and escaping
1396
1397 sub validate_action {
1398         my $input = shift || return undef;
1399         return undef unless exists $actions{$input};
1400         return $input;
1401 }
1402
1403 sub validate_project {
1404         my $input = shift || return undef;
1405         if (!validate_pathname($input) ||
1406                 !(-d "$projectroot/$input") ||
1407                 !check_export_ok("$projectroot/$input") ||
1408                 ($strict_export && !project_in_list($input))) {
1409                 return undef;
1410         } else {
1411                 return $input;
1412         }
1413 }
1414
1415 sub validate_pathname {
1416         my $input = shift || return undef;
1417
1418         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1419         # at the beginning, at the end, and between slashes.
1420         # also this catches doubled slashes
1421         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1422                 return undef;
1423         }
1424         # no null characters
1425         if ($input =~ m!\0!) {
1426                 return undef;
1427         }
1428         return $input;
1429 }
1430
1431 sub validate_refname {
1432         my $input = shift || return undef;
1433
1434         # textual hashes are O.K.
1435         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1436                 return $input;
1437         }
1438         # it must be correct pathname
1439         $input = validate_pathname($input)
1440                 or return undef;
1441         # restrictions on ref name according to git-check-ref-format
1442         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1443                 return undef;
1444         }
1445         return $input;
1446 }
1447
1448 # decode sequences of octets in utf8 into Perl's internal form,
1449 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1450 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1451 sub to_utf8 {
1452         my $str = shift;
1453         return undef unless defined $str;
1454
1455         if (utf8::is_utf8($str) || utf8::decode($str)) {
1456                 return $str;
1457         } else {
1458                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1459         }
1460 }
1461
1462 # quote unsafe chars, but keep the slash, even when it's not
1463 # correct, but quoted slashes look too horrible in bookmarks
1464 sub esc_param {
1465         my $str = shift;
1466         return undef unless defined $str;
1467         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1468         $str =~ s/ /\+/g;
1469         return $str;
1470 }
1471
1472 # the quoting rules for path_info fragment are slightly different
1473 sub esc_path_info {
1474         my $str = shift;
1475         return undef unless defined $str;
1476
1477         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1478         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1479
1480         return $str;
1481 }
1482
1483 # quote unsafe chars in whole URL, so some characters cannot be quoted
1484 sub esc_url {
1485         my $str = shift;
1486         return undef unless defined $str;
1487         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1488         $str =~ s/ /\+/g;
1489         return $str;
1490 }
1491
1492 # quote unsafe characters in HTML attributes
1493 sub esc_attr {
1494
1495         # for XHTML conformance escaping '"' to '&quot;' is not enough
1496         return esc_html(@_);
1497 }
1498
1499 # replace invalid utf8 character with SUBSTITUTION sequence
1500 sub esc_html {
1501         my $str = shift;
1502         my %opts = @_;
1503
1504         return undef unless defined $str;
1505
1506         $str = to_utf8($str);
1507         $str = $cgi->escapeHTML($str);
1508         if ($opts{'-nbsp'}) {
1509                 $str =~ s/ /&nbsp;/g;
1510         }
1511         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1512         return $str;
1513 }
1514
1515 # quote control characters and escape filename to HTML
1516 sub esc_path {
1517         my $str = shift;
1518         my %opts = @_;
1519
1520         return undef unless defined $str;
1521
1522         $str = to_utf8($str);
1523         $str = $cgi->escapeHTML($str);
1524         if ($opts{'-nbsp'}) {
1525                 $str =~ s/ /&nbsp;/g;
1526         }
1527         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1528         return $str;
1529 }
1530
1531 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1532 sub sanitize {
1533         my $str = shift;
1534
1535         return undef unless defined $str;
1536
1537         $str = to_utf8($str);
1538         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1539         return $str;
1540 }
1541
1542 # Make control characters "printable", using character escape codes (CEC)
1543 sub quot_cec {
1544         my $cntrl = shift;
1545         my %opts = @_;
1546         my %es = ( # character escape codes, aka escape sequences
1547                 "\t" => '\t',   # tab            (HT)
1548                 "\n" => '\n',   # line feed      (LF)
1549                 "\r" => '\r',   # carrige return (CR)
1550                 "\f" => '\f',   # form feed      (FF)
1551                 "\b" => '\b',   # backspace      (BS)
1552                 "\a" => '\a',   # alarm (bell)   (BEL)
1553                 "\e" => '\e',   # escape         (ESC)
1554                 "\013" => '\v', # vertical tab   (VT)
1555                 "\000" => '\0', # nul character  (NUL)
1556         );
1557         my $chr = ( (exists $es{$cntrl})
1558                     ? $es{$cntrl}
1559                     : sprintf('\%2x', ord($cntrl)) );
1560         if ($opts{-nohtml}) {
1561                 return $chr;
1562         } else {
1563                 return "<span class=\"cntrl\">$chr</span>";
1564         }
1565 }
1566
1567 # Alternatively use unicode control pictures codepoints,
1568 # Unicode "printable representation" (PR)
1569 sub quot_upr {
1570         my $cntrl = shift;
1571         my %opts = @_;
1572
1573         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1574         if ($opts{-nohtml}) {
1575                 return $chr;
1576         } else {
1577                 return "<span class=\"cntrl\">$chr</span>";
1578         }
1579 }
1580
1581 # git may return quoted and escaped filenames
1582 sub unquote {
1583         my $str = shift;
1584
1585         sub unq {
1586                 my $seq = shift;
1587                 my %es = ( # character escape codes, aka escape sequences
1588                         't' => "\t",   # tab            (HT, TAB)
1589                         'n' => "\n",   # newline        (NL)
1590                         'r' => "\r",   # return         (CR)
1591                         'f' => "\f",   # form feed      (FF)
1592                         'b' => "\b",   # backspace      (BS)
1593                         'a' => "\a",   # alarm (bell)   (BEL)
1594                         'e' => "\e",   # escape         (ESC)
1595                         'v' => "\013", # vertical tab   (VT)
1596                 );
1597
1598                 if ($seq =~ m/^[0-7]{1,3}$/) {
1599                         # octal char sequence
1600                         return chr(oct($seq));
1601                 } elsif (exists $es{$seq}) {
1602                         # C escape sequence, aka character escape code
1603                         return $es{$seq};
1604                 }
1605                 # quoted ordinary character
1606                 return $seq;
1607         }
1608
1609         if ($str =~ m/^"(.*)"$/) {
1610                 # needs unquoting
1611                 $str = $1;
1612                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1613         }
1614         return $str;
1615 }
1616
1617 # escape tabs (convert tabs to spaces)
1618 sub untabify {
1619         my $line = shift;
1620
1621         while ((my $pos = index($line, "\t")) != -1) {
1622                 if (my $count = (8 - ($pos % 8))) {
1623                         my $spaces = ' ' x $count;
1624                         $line =~ s/\t/$spaces/;
1625                 }
1626         }
1627
1628         return $line;
1629 }
1630
1631 sub project_in_list {
1632         my $project = shift;
1633         my @list = git_get_projects_list();
1634         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1635 }
1636
1637 ## ----------------------------------------------------------------------
1638 ## HTML aware string manipulation
1639
1640 # Try to chop given string on a word boundary between position
1641 # $len and $len+$add_len. If there is no word boundary there,
1642 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1643 # (marking chopped part) would be longer than given string.
1644 sub chop_str {
1645         my $str = shift;
1646         my $len = shift;
1647         my $add_len = shift || 10;
1648         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1649
1650         # Make sure perl knows it is utf8 encoded so we don't
1651         # cut in the middle of a utf8 multibyte char.
1652         $str = to_utf8($str);
1653
1654         # allow only $len chars, but don't cut a word if it would fit in $add_len
1655         # if it doesn't fit, cut it if it's still longer than the dots we would add
1656         # remove chopped character entities entirely
1657
1658         # when chopping in the middle, distribute $len into left and right part
1659         # return early if chopping wouldn't make string shorter
1660         if ($where eq 'center') {
1661                 return $str if ($len + 5 >= length($str)); # filler is length 5
1662                 $len = int($len/2);
1663         } else {
1664                 return $str if ($len + 4 >= length($str)); # filler is length 4
1665         }
1666
1667         # regexps: ending and beginning with word part up to $add_len
1668         my $endre = qr/.{$len}\w{0,$add_len}/;
1669         my $begre = qr/\w{0,$add_len}.{$len}/;
1670
1671         if ($where eq 'left') {
1672                 $str =~ m/^(.*?)($begre)$/;
1673                 my ($lead, $body) = ($1, $2);
1674                 if (length($lead) > 4) {
1675                         $lead = " ...";
1676                 }
1677                 return "$lead$body";
1678
1679         } elsif ($where eq 'center') {
1680                 $str =~ m/^($endre)(.*)$/;
1681                 my ($left, $str)  = ($1, $2);
1682                 $str =~ m/^(.*?)($begre)$/;
1683                 my ($mid, $right) = ($1, $2);
1684                 if (length($mid) > 5) {
1685                         $mid = " ... ";
1686                 }
1687                 return "$left$mid$right";
1688
1689         } else {
1690                 $str =~ m/^($endre)(.*)$/;
1691                 my $body = $1;
1692                 my $tail = $2;
1693                 if (length($tail) > 4) {
1694                         $tail = "... ";
1695                 }
1696                 return "$body$tail";
1697         }
1698 }
1699
1700 # takes the same arguments as chop_str, but also wraps a <span> around the
1701 # result with a title attribute if it does get chopped. Additionally, the
1702 # string is HTML-escaped.
1703 sub chop_and_escape_str {
1704         my ($str) = @_;
1705
1706         my $chopped = chop_str(@_);
1707         $str = to_utf8($str);
1708         if ($chopped eq $str) {
1709                 return esc_html($chopped);
1710         } else {
1711                 $str =~ s/[[:cntrl:]]/?/g;
1712                 return $cgi->span({-title=>$str}, esc_html($chopped));
1713         }
1714 }
1715
1716 ## ----------------------------------------------------------------------
1717 ## functions returning short strings
1718
1719 # CSS class for given age value (in seconds)
1720 sub age_class {
1721         my $age = shift;
1722
1723         if (!defined $age) {
1724                 return "noage";
1725         } elsif ($age < 60*60*2) {
1726                 return "age0";
1727         } elsif ($age < 60*60*24*2) {
1728                 return "age1";
1729         } else {
1730                 return "age2";
1731         }
1732 }
1733
1734 # convert age in seconds to "nn units ago" string
1735 sub age_string {
1736         my $age = shift;
1737         my $age_str;
1738
1739         if ($age > 60*60*24*365*2) {
1740                 $age_str = (int $age/60/60/24/365);
1741                 $age_str .= " years ago";
1742         } elsif ($age > 60*60*24*(365/12)*2) {
1743                 $age_str = int $age/60/60/24/(365/12);
1744                 $age_str .= " months ago";
1745         } elsif ($age > 60*60*24*7*2) {
1746                 $age_str = int $age/60/60/24/7;
1747                 $age_str .= " weeks ago";
1748         } elsif ($age > 60*60*24*2) {
1749                 $age_str = int $age/60/60/24;
1750                 $age_str .= " days ago";
1751         } elsif ($age > 60*60*2) {
1752                 $age_str = int $age/60/60;
1753                 $age_str .= " hours ago";
1754         } elsif ($age > 60*2) {
1755                 $age_str = int $age/60;
1756                 $age_str .= " min ago";
1757         } elsif ($age > 2) {
1758                 $age_str = int $age;
1759                 $age_str .= " sec ago";
1760         } else {
1761                 $age_str .= " right now";
1762         }
1763         return $age_str;
1764 }
1765
1766 use constant {
1767         S_IFINVALID => 0030000,
1768         S_IFGITLINK => 0160000,
1769 };
1770
1771 # submodule/subproject, a commit object reference
1772 sub S_ISGITLINK {
1773         my $mode = shift;
1774
1775         return (($mode & S_IFMT) == S_IFGITLINK)
1776 }
1777
1778 # convert file mode in octal to symbolic file mode string
1779 sub mode_str {
1780         my $mode = oct shift;
1781
1782         if (S_ISGITLINK($mode)) {
1783                 return 'm---------';
1784         } elsif (S_ISDIR($mode & S_IFMT)) {
1785                 return 'drwxr-xr-x';
1786         } elsif (S_ISLNK($mode)) {
1787                 return 'lrwxrwxrwx';
1788         } elsif (S_ISREG($mode)) {
1789                 # git cares only about the executable bit
1790                 if ($mode & S_IXUSR) {
1791                         return '-rwxr-xr-x';
1792                 } else {
1793                         return '-rw-r--r--';
1794                 };
1795         } else {
1796                 return '----------';
1797         }
1798 }
1799
1800 # convert file mode in octal to file type string
1801 sub file_type {
1802         my $mode = shift;
1803
1804         if ($mode !~ m/^[0-7]+$/) {
1805                 return $mode;
1806         } else {
1807                 $mode = oct $mode;
1808         }
1809
1810         if (S_ISGITLINK($mode)) {
1811                 return "submodule";
1812         } elsif (S_ISDIR($mode & S_IFMT)) {
1813                 return "directory";
1814         } elsif (S_ISLNK($mode)) {
1815                 return "symlink";
1816         } elsif (S_ISREG($mode)) {
1817                 return "file";
1818         } else {
1819                 return "unknown";
1820         }
1821 }
1822
1823 # convert file mode in octal to file type description string
1824 sub file_type_long {
1825         my $mode = shift;
1826
1827         if ($mode !~ m/^[0-7]+$/) {
1828                 return $mode;
1829         } else {
1830                 $mode = oct $mode;
1831         }
1832
1833         if (S_ISGITLINK($mode)) {
1834                 return "submodule";
1835         } elsif (S_ISDIR($mode & S_IFMT)) {
1836                 return "directory";
1837         } elsif (S_ISLNK($mode)) {
1838                 return "symlink";
1839         } elsif (S_ISREG($mode)) {
1840                 if ($mode & S_IXUSR) {
1841                         return "executable";
1842                 } else {
1843                         return "file";
1844                 };
1845         } else {
1846                 return "unknown";
1847         }
1848 }
1849
1850
1851 ## ----------------------------------------------------------------------
1852 ## functions returning short HTML fragments, or transforming HTML fragments
1853 ## which don't belong to other sections
1854
1855 # format line of commit message.
1856 sub format_log_line_html {
1857         my $line = shift;
1858
1859         $line = esc_html($line, -nbsp=>1);
1860         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1861                 $cgi->a({-href => href(action=>"object", hash=>$1),
1862                                         -class => "text"}, $1);
1863         }eg;
1864
1865         return $line;
1866 }
1867
1868 # format marker of refs pointing to given object
1869
1870 # the destination action is chosen based on object type and current context:
1871 # - for annotated tags, we choose the tag view unless it's the current view
1872 #   already, in which case we go to shortlog view
1873 # - for other refs, we keep the current view if we're in history, shortlog or
1874 #   log view, and select shortlog otherwise
1875 sub format_ref_marker {
1876         my ($refs, $id) = @_;
1877         my $markers = '';
1878
1879         if (defined $refs->{$id}) {
1880                 foreach my $ref (@{$refs->{$id}}) {
1881                         # this code exploits the fact that non-lightweight tags are the
1882                         # only indirect objects, and that they are the only objects for which
1883                         # we want to use tag instead of shortlog as action
1884                         my ($type, $name) = qw();
1885                         my $indirect = ($ref =~ s/\^\{\}$//);
1886                         # e.g. tags/v2.6.11 or heads/next
1887                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1888                                 $type = $1;
1889                                 $name = $2;
1890                         } else {
1891                                 $type = "ref";
1892                                 $name = $ref;
1893                         }
1894
1895                         my $class = $type;
1896                         $class .= " indirect" if $indirect;
1897
1898                         my $dest_action = "shortlog";
1899
1900                         if ($indirect) {
1901                                 $dest_action = "tag" unless $action eq "tag";
1902                         } elsif ($action =~ /^(history|(short)?log)$/) {
1903                                 $dest_action = $action;
1904                         }
1905
1906                         my $dest = "";
1907                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1908                         $dest .= $ref;
1909
1910                         my $link = $cgi->a({
1911                                 -href => href(
1912                                         action=>$dest_action,
1913                                         hash=>$dest
1914                                 )}, $name);
1915
1916                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1917                                 $link . "</span>";
1918                 }
1919         }
1920
1921         if ($markers) {
1922                 return ' <span class="refs">'. $markers . '</span>';
1923         } else {
1924                 return "";
1925         }
1926 }
1927
1928 # format, perhaps shortened and with markers, title line
1929 sub format_subject_html {
1930         my ($long, $short, $href, $extra) = @_;
1931         $extra = '' unless defined($extra);
1932
1933         if (length($short) < length($long)) {
1934                 $long =~ s/[[:cntrl:]]/?/g;
1935                 return $cgi->a({-href => $href, -class => "list subject",
1936                                 -title => to_utf8($long)},
1937                        esc_html($short)) . $extra;
1938         } else {
1939                 return $cgi->a({-href => $href, -class => "list subject"},
1940                        esc_html($long)) . $extra;
1941         }
1942 }
1943
1944 # Rather than recomputing the url for an email multiple times, we cache it
1945 # after the first hit. This gives a visible benefit in views where the avatar
1946 # for the same email is used repeatedly (e.g. shortlog).
1947 # The cache is shared by all avatar engines (currently gravatar only), which
1948 # are free to use it as preferred. Since only one avatar engine is used for any
1949 # given page, there's no risk for cache conflicts.
1950 our %avatar_cache = ();
1951
1952 # Compute the picon url for a given email, by using the picon search service over at
1953 # http://www.cs.indiana.edu/picons/search.html
1954 sub picon_url {
1955         my $email = lc shift;
1956         if (!$avatar_cache{$email}) {
1957                 my ($user, $domain) = split('@', $email);
1958                 $avatar_cache{$email} =
1959                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1960                         "$domain/$user/" .
1961                         "users+domains+unknown/up/single";
1962         }
1963         return $avatar_cache{$email};
1964 }
1965
1966 # Compute the gravatar url for a given email, if it's not in the cache already.
1967 # Gravatar stores only the part of the URL before the size, since that's the
1968 # one computationally more expensive. This also allows reuse of the cache for
1969 # different sizes (for this particular engine).
1970 sub gravatar_url {
1971         my $email = lc shift;
1972         my $size = shift;
1973         $avatar_cache{$email} ||=
1974                 "http://www.gravatar.com/avatar/" .
1975                         Digest::MD5::md5_hex($email) . "?s=";
1976         return $avatar_cache{$email} . $size;
1977 }
1978
1979 # Insert an avatar for the given $email at the given $size if the feature
1980 # is enabled.
1981 sub git_get_avatar {
1982         my ($email, %opts) = @_;
1983         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1984         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1985         $opts{-size} ||= 'default';
1986         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1987         my $url = "";
1988         if ($git_avatar eq 'gravatar') {
1989                 $url = gravatar_url($email, $size);
1990         } elsif ($git_avatar eq 'picon') {
1991                 $url = picon_url($email);
1992         }
1993         # Other providers can be added by extending the if chain, defining $url
1994         # as needed. If no variant puts something in $url, we assume avatars
1995         # are completely disabled/unavailable.
1996         if ($url) {
1997                 return $pre_white .
1998                        "<img width=\"$size\" " .
1999                             "class=\"avatar\" " .
2000                             "src=\"".esc_url($url)."\" " .
2001                             "alt=\"\" " .
2002                        "/>" . $post_white;
2003         } else {
2004                 return "";
2005         }
2006 }
2007
2008 sub format_search_author {
2009         my ($author, $searchtype, $displaytext) = @_;
2010         my $have_search = gitweb_check_feature('search');
2011
2012         if ($have_search) {
2013                 my $performed = "";
2014                 if ($searchtype eq 'author') {
2015                         $performed = "authored";
2016                 } elsif ($searchtype eq 'committer') {
2017                         $performed = "committed";
2018                 }
2019
2020                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2021                                 searchtext=>$author,
2022                                 searchtype=>$searchtype), class=>"list",
2023                                 title=>"Search for commits $performed by $author"},
2024                                 $displaytext);
2025
2026         } else {
2027                 return $displaytext;
2028         }
2029 }
2030
2031 # format the author name of the given commit with the given tag
2032 # the author name is chopped and escaped according to the other
2033 # optional parameters (see chop_str).
2034 sub format_author_html {
2035         my $tag = shift;
2036         my $co = shift;
2037         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2038         return "<$tag class=\"author\">" .
2039                format_search_author($co->{'author_name'}, "author",
2040                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2041                        $author) .
2042                "</$tag>";
2043 }
2044
2045 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2046 sub format_git_diff_header_line {
2047         my $line = shift;
2048         my $diffinfo = shift;
2049         my ($from, $to) = @_;
2050
2051         if ($diffinfo->{'nparents'}) {
2052                 # combined diff
2053                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2054                 if ($to->{'href'}) {
2055                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2056                                          esc_path($to->{'file'}));
2057                 } else { # file was deleted (no href)
2058                         $line .= esc_path($to->{'file'});
2059                 }
2060         } else {
2061                 # "ordinary" diff
2062                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2063                 if ($from->{'href'}) {
2064                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2065                                          'a/' . esc_path($from->{'file'}));
2066                 } else { # file was added (no href)
2067                         $line .= 'a/' . esc_path($from->{'file'});
2068                 }
2069                 $line .= ' ';
2070                 if ($to->{'href'}) {
2071                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2072                                          'b/' . esc_path($to->{'file'}));
2073                 } else { # file was deleted
2074                         $line .= 'b/' . esc_path($to->{'file'});
2075                 }
2076         }
2077
2078         return "<div class=\"diff header\">$line</div>\n";
2079 }
2080
2081 # format extended diff header line, before patch itself
2082 sub format_extended_diff_header_line {
2083         my $line = shift;
2084         my $diffinfo = shift;
2085         my ($from, $to) = @_;
2086
2087         # match <path>
2088         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2089                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2090                                        esc_path($from->{'file'}));
2091         }
2092         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2093                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2094                                  esc_path($to->{'file'}));
2095         }
2096         # match single <mode>
2097         if ($line =~ m/\s(\d{6})$/) {
2098                 $line .= '<span class="info"> (' .
2099                          file_type_long($1) .
2100                          ')</span>';
2101         }
2102         # match <hash>
2103         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2104                 # can match only for combined diff
2105                 $line = 'index ';
2106                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2107                         if ($from->{'href'}[$i]) {
2108                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2109                                                   -class=>"hash"},
2110                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2111                         } else {
2112                                 $line .= '0' x 7;
2113                         }
2114                         # separator
2115                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2116                 }
2117                 $line .= '..';
2118                 if ($to->{'href'}) {
2119                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2120                                          substr($diffinfo->{'to_id'},0,7));
2121                 } else {
2122                         $line .= '0' x 7;
2123                 }
2124
2125         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2126                 # can match only for ordinary diff
2127                 my ($from_link, $to_link);
2128                 if ($from->{'href'}) {
2129                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2130                                              substr($diffinfo->{'from_id'},0,7));
2131                 } else {
2132                         $from_link = '0' x 7;
2133                 }
2134                 if ($to->{'href'}) {
2135                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2136                                            substr($diffinfo->{'to_id'},0,7));
2137                 } else {
2138                         $to_link = '0' x 7;
2139                 }
2140                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2141                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2142         }
2143
2144         return $line . "<br/>\n";
2145 }
2146
2147 # format from-file/to-file diff header
2148 sub format_diff_from_to_header {
2149         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2150         my $line;
2151         my $result = '';
2152
2153         $line = $from_line;
2154         #assert($line =~ m/^---/) if DEBUG;
2155         # no extra formatting for "^--- /dev/null"
2156         if (! $diffinfo->{'nparents'}) {
2157                 # ordinary (single parent) diff
2158                 if ($line =~ m!^--- "?a/!) {
2159                         if ($from->{'href'}) {
2160                                 $line = '--- a/' .
2161                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2162                                                 esc_path($from->{'file'}));
2163                         } else {
2164                                 $line = '--- a/' .
2165                                         esc_path($from->{'file'});
2166                         }
2167                 }
2168                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2169
2170         } else {
2171                 # combined diff (merge commit)
2172                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2173                         if ($from->{'href'}[$i]) {
2174                                 $line = '--- ' .
2175                                         $cgi->a({-href=>href(action=>"blobdiff",
2176                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2177                                                              hash_parent_base=>$parents[$i],
2178                                                              file_parent=>$from->{'file'}[$i],
2179                                                              hash=>$diffinfo->{'to_id'},
2180                                                              hash_base=>$hash,
2181                                                              file_name=>$to->{'file'}),
2182                                                  -class=>"path",
2183                                                  -title=>"diff" . ($i+1)},
2184                                                 $i+1) .
2185                                         '/' .
2186                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2187                                                 esc_path($from->{'file'}[$i]));
2188                         } else {
2189                                 $line = '--- /dev/null';
2190                         }
2191                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2192                 }
2193         }
2194
2195         $line = $to_line;
2196         #assert($line =~ m/^\+\+\+/) if DEBUG;
2197         # no extra formatting for "^+++ /dev/null"
2198         if ($line =~ m!^\+\+\+ "?b/!) {
2199                 if ($to->{'href'}) {
2200                         $line = '+++ b/' .
2201                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2202                                         esc_path($to->{'file'}));
2203                 } else {
2204                         $line = '+++ b/' .
2205                                 esc_path($to->{'file'});
2206                 }
2207         }
2208         $result .= qq!<div class="diff to_file">$line</div>\n!;
2209
2210         return $result;
2211 }
2212
2213 # create note for patch simplified by combined diff
2214 sub format_diff_cc_simplified {
2215         my ($diffinfo, @parents) = @_;
2216         my $result = '';
2217
2218         $result .= "<div class=\"diff header\">" .
2219                    "diff --cc ";
2220         if (!is_deleted($diffinfo)) {
2221                 $result .= $cgi->a({-href => href(action=>"blob",
2222                                                   hash_base=>$hash,
2223                                                   hash=>$diffinfo->{'to_id'},
2224                                                   file_name=>$diffinfo->{'to_file'}),
2225                                     -class => "path"},
2226                                    esc_path($diffinfo->{'to_file'}));
2227         } else {
2228                 $result .= esc_path($diffinfo->{'to_file'});
2229         }
2230         $result .= "</div>\n" . # class="diff header"
2231                    "<div class=\"diff nodifferences\">" .
2232                    "Simple merge" .
2233                    "</div>\n"; # class="diff nodifferences"
2234
2235         return $result;
2236 }
2237
2238 sub diff_line_class {
2239         my ($line, $from, $to) = @_;
2240
2241         # ordinary diff
2242         my $num_sign = 1;
2243         # combined diff
2244         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2245                 $num_sign = scalar @{$from->{'href'}};
2246         }
2247
2248         my @diff_line_classifier = (
2249                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2250                 { regexp => qr/^\\/,               class => "incomplete"  },
2251                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2252                 # classifier for context must come before classifier add/rem,
2253                 # or we would have to use more complicated regexp, for example
2254                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2255                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2256                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2257         );
2258         for my $clsfy (@diff_line_classifier) {
2259                 return $clsfy->{'class'}
2260                         if ($line =~ $clsfy->{'regexp'});
2261         }
2262
2263         # fallback
2264         return "";
2265 }
2266
2267 # assumes that $from and $to are defined and correctly filled,
2268 # and that $line holds a line of chunk header for unified diff
2269 sub format_unidiff_chunk_header {
2270         my ($line, $from, $to) = @_;
2271
2272         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2273                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2274
2275         $from_lines = 0 unless defined $from_lines;
2276         $to_lines   = 0 unless defined $to_lines;
2277
2278         if ($from->{'href'}) {
2279                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2280                                      -class=>"list"}, $from_text);
2281         }
2282         if ($to->{'href'}) {
2283                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2284                                      -class=>"list"}, $to_text);
2285         }
2286         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2287                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2288         return $line;
2289 }
2290
2291 # assumes that $from and $to are defined and correctly filled,
2292 # and that $line holds a line of chunk header for combined diff
2293 sub format_cc_diff_chunk_header {
2294         my ($line, $from, $to) = @_;
2295
2296         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2297         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2298
2299         @from_text = split(' ', $ranges);
2300         for (my $i = 0; $i < @from_text; ++$i) {
2301                 ($from_start[$i], $from_nlines[$i]) =
2302                         (split(',', substr($from_text[$i], 1)), 0);
2303         }
2304
2305         $to_text   = pop @from_text;
2306         $to_start  = pop @from_start;
2307         $to_nlines = pop @from_nlines;
2308
2309         $line = "<span class=\"chunk_info\">$prefix ";
2310         for (my $i = 0; $i < @from_text; ++$i) {
2311                 if ($from->{'href'}[$i]) {
2312                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2313                                           -class=>"list"}, $from_text[$i]);
2314                 } else {
2315                         $line .= $from_text[$i];
2316                 }
2317                 $line .= " ";
2318         }
2319         if ($to->{'href'}) {
2320                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2321                                   -class=>"list"}, $to_text);
2322         } else {
2323                 $line .= $to_text;
2324         }
2325         $line .= " $prefix</span>" .
2326                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2327         return $line;
2328 }
2329
2330 # process patch (diff) line (not to be used for diff headers),
2331 # returning class and HTML-formatted (but not wrapped) line
2332 sub process_diff_line {
2333         my $line = shift;
2334         my ($from, $to) = @_;
2335
2336         my $diff_class = diff_line_class($line, $from, $to);
2337
2338         chomp $line;
2339         $line = untabify($line);
2340
2341         if ($from && $to && $line =~ m/^\@{2} /) {
2342                 $line = format_unidiff_chunk_header($line, $from, $to);
2343                 return $diff_class, $line;
2344
2345         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2346                 $line = format_cc_diff_chunk_header($line, $from, $to);
2347                 return $diff_class, $line;
2348
2349         }
2350         return $diff_class, esc_html($line, -nbsp=>1);
2351 }
2352
2353 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2354 # linked.  Pass the hash of the tree/commit to snapshot.
2355 sub format_snapshot_links {
2356         my ($hash) = @_;
2357         my $num_fmts = @snapshot_fmts;
2358         if ($num_fmts > 1) {
2359                 # A parenthesized list of links bearing format names.
2360                 # e.g. "snapshot (_tar.gz_ _zip_)"
2361                 return "snapshot (" . join(' ', map
2362                         $cgi->a({
2363                                 -href => href(
2364                                         action=>"snapshot",
2365                                         hash=>$hash,
2366                                         snapshot_format=>$_
2367                                 )
2368                         }, $known_snapshot_formats{$_}{'display'})
2369                 , @snapshot_fmts) . ")";
2370         } elsif ($num_fmts == 1) {
2371                 # A single "snapshot" link whose tooltip bears the format name.
2372                 # i.e. "_snapshot_"
2373                 my ($fmt) = @snapshot_fmts;
2374                 return
2375                         $cgi->a({
2376                                 -href => href(
2377                                         action=>"snapshot",
2378                                         hash=>$hash,
2379                                         snapshot_format=>$fmt
2380                                 ),
2381                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2382                         }, "snapshot");
2383         } else { # $num_fmts == 0
2384                 return undef;
2385         }
2386 }
2387
2388 ## ......................................................................
2389 ## functions returning values to be passed, perhaps after some
2390 ## transformation, to other functions; e.g. returning arguments to href()
2391
2392 # returns hash to be passed to href to generate gitweb URL
2393 # in -title key it returns description of link
2394 sub get_feed_info {
2395         my $format = shift || 'Atom';
2396         my %res = (action => lc($format));
2397
2398         # feed links are possible only for project views
2399         return unless (defined $project);
2400         # some views should link to OPML, or to generic project feed,
2401         # or don't have specific feed yet (so they should use generic)
2402         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2403
2404         my $branch;
2405         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2406         # from tag links; this also makes possible to detect branch links
2407         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2408             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2409                 $branch = $1;
2410         }
2411         # find log type for feed description (title)
2412         my $type = 'log';
2413         if (defined $file_name) {
2414                 $type  = "history of $file_name";
2415                 $type .= "/" if ($action eq 'tree');
2416                 $type .= " on '$branch'" if (defined $branch);
2417         } else {
2418                 $type = "log of $branch" if (defined $branch);
2419         }
2420
2421         $res{-title} = $type;
2422         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2423         $res{'file_name'} = $file_name;
2424
2425         return %res;
2426 }
2427
2428 ## ----------------------------------------------------------------------
2429 ## git utility subroutines, invoking git commands
2430
2431 # returns path to the core git executable and the --git-dir parameter as list
2432 sub git_cmd {
2433         $number_of_git_cmds++;
2434         return $GIT, '--git-dir='.$git_dir;
2435 }
2436
2437 # quote the given arguments for passing them to the shell
2438 # quote_command("command", "arg 1", "arg with ' and ! characters")
2439 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2440 # Try to avoid using this function wherever possible.
2441 sub quote_command {
2442         return join(' ',
2443                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2444 }
2445
2446 # get HEAD ref of given project as hash
2447 sub git_get_head_hash {
2448         return git_get_full_hash(shift, 'HEAD');
2449 }
2450
2451 sub git_get_full_hash {
2452         return git_get_hash(@_);
2453 }
2454
2455 sub git_get_short_hash {
2456         return git_get_hash(@_, '--short=7');
2457 }
2458
2459 sub git_get_hash {
2460         my ($project, $hash, @options) = @_;
2461         my $o_git_dir = $git_dir;
2462         my $retval = undef;
2463         $git_dir = "$projectroot/$project";
2464         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2465             '--verify', '-q', @options, $hash) {
2466                 $retval = <$fd>;
2467                 chomp $retval if defined $retval;
2468                 close $fd;
2469         }
2470         if (defined $o_git_dir) {
2471                 $git_dir = $o_git_dir;
2472         }
2473         return $retval;
2474 }
2475
2476 # get type of given object
2477 sub git_get_type {
2478         my $hash = shift;
2479
2480         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2481         my $type = <$fd>;
2482         close $fd or return;
2483         chomp $type;
2484         return $type;
2485 }
2486
2487 # repository configuration
2488 our $config_file = '';
2489 our %config;
2490
2491 # store multiple values for single key as anonymous array reference
2492 # single values stored directly in the hash, not as [ <value> ]
2493 sub hash_set_multi {
2494         my ($hash, $key, $value) = @_;
2495
2496         if (!exists $hash->{$key}) {
2497                 $hash->{$key} = $value;
2498         } elsif (!ref $hash->{$key}) {
2499                 $hash->{$key} = [ $hash->{$key}, $value ];
2500         } else {
2501                 push @{$hash->{$key}}, $value;
2502         }
2503 }
2504
2505 # return hash of git project configuration
2506 # optionally limited to some section, e.g. 'gitweb'
2507 sub git_parse_project_config {
2508         my $section_regexp = shift;
2509         my %config;
2510
2511         local $/ = "\0";
2512
2513         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2514                 or return;
2515
2516         while (my $keyval = <$fh>) {
2517                 chomp $keyval;
2518                 my ($key, $value) = split(/\n/, $keyval, 2);
2519
2520                 hash_set_multi(\%config, $key, $value)
2521                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2522         }
2523         close $fh;
2524
2525         return %config;
2526 }
2527
2528 # convert config value to boolean: 'true' or 'false'
2529 # no value, number > 0, 'true' and 'yes' values are true
2530 # rest of values are treated as false (never as error)
2531 sub config_to_bool {
2532         my $val = shift;
2533
2534         return 1 if !defined $val;             # section.key
2535
2536         # strip leading and trailing whitespace
2537         $val =~ s/^\s+//;
2538         $val =~ s/\s+$//;
2539
2540         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2541                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2542 }
2543
2544 # convert config value to simple decimal number
2545 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2546 # to be multiplied by 1024, 1048576, or 1073741824
2547 sub config_to_int {
2548         my $val = shift;
2549
2550         # strip leading and trailing whitespace
2551         $val =~ s/^\s+//;
2552         $val =~ s/\s+$//;
2553
2554         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2555                 $unit = lc($unit);
2556                 # unknown unit is treated as 1
2557                 return $num * ($unit eq 'g' ? 1073741824 :
2558                                $unit eq 'm' ?    1048576 :
2559                                $unit eq 'k' ?       1024 : 1);
2560         }
2561         return $val;
2562 }
2563
2564 # convert config value to array reference, if needed
2565 sub config_to_multi {
2566         my $val = shift;
2567
2568         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2569 }
2570
2571 sub git_get_project_config {
2572         my ($key, $type) = @_;
2573
2574         return unless defined $git_dir;
2575
2576         # key sanity check
2577         return unless ($key);
2578         # only subsection, if exists, is case sensitive,
2579         # and not lowercased by 'git config -z -l'
2580         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2581                 $key = join(".", lc($hi), $mi, lc($lo));
2582         } else {
2583                 $key = lc($key);
2584         }
2585         $key =~ s/^gitweb\.//;
2586         return if ($key =~ m/\W/);
2587
2588         # type sanity check
2589         if (defined $type) {
2590                 $type =~ s/^--//;
2591                 $type = undef
2592                         unless ($type eq 'bool' || $type eq 'int');
2593         }
2594
2595         # get config
2596         if (!defined $config_file ||
2597             $config_file ne "$git_dir/config") {
2598                 %config = git_parse_project_config('gitweb');
2599                 $config_file = "$git_dir/config";
2600         }
2601
2602         # check if config variable (key) exists
2603         return unless exists $config{"gitweb.$key"};
2604
2605         # ensure given type
2606         if (!defined $type) {
2607                 return $config{"gitweb.$key"};
2608         } elsif ($type eq 'bool') {
2609                 # backward compatibility: 'git config --bool' returns true/false
2610                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2611         } elsif ($type eq 'int') {
2612                 return config_to_int($config{"gitweb.$key"});
2613         }
2614         return $config{"gitweb.$key"};
2615 }
2616
2617 # get hash of given path at given ref
2618 sub git_get_hash_by_path {
2619         my $base = shift;
2620         my $path = shift || return undef;
2621         my $type = shift;
2622
2623         $path =~ s,/+$,,;
2624
2625         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2626                 or die_error(500, "Open git-ls-tree failed");
2627         my $line = <$fd>;
2628         close $fd or return undef;
2629
2630         if (!defined $line) {
2631                 # there is no tree or hash given by $path at $base
2632                 return undef;
2633         }
2634
2635         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2636         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2637         if (defined $type && $type ne $2) {
2638                 # type doesn't match
2639                 return undef;
2640         }
2641         return $3;
2642 }
2643
2644 # get path of entry with given hash at given tree-ish (ref)
2645 # used to get 'from' filename for combined diff (merge commit) for renames
2646 sub git_get_path_by_hash {
2647         my $base = shift || return;
2648         my $hash = shift || return;
2649
2650         local $/ = "\0";
2651
2652         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2653                 or return undef;
2654         while (my $line = <$fd>) {
2655                 chomp $line;
2656
2657                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2658                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2659                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2660                         close $fd;
2661                         return $1;
2662                 }
2663         }
2664         close $fd;
2665         return undef;
2666 }
2667
2668 ## ......................................................................
2669 ## git utility functions, directly accessing git repository
2670
2671 # get the value of config variable either from file named as the variable
2672 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2673 # configuration variable in the repository config file.
2674 sub git_get_file_or_project_config {
2675         my ($path, $name) = @_;
2676
2677         $git_dir = "$projectroot/$path";
2678         open my $fd, '<', "$git_dir/$name"
2679                 or return git_get_project_config($name);
2680         my $conf = <$fd>;
2681         close $fd;
2682         if (defined $conf) {
2683                 chomp $conf;
2684         }
2685         return $conf;
2686 }
2687
2688 sub git_get_project_description {
2689         my $path = shift;
2690         return git_get_file_or_project_config($path, 'description');
2691 }
2692
2693 sub git_get_project_category {
2694         my $path = shift;
2695         return git_get_file_or_project_config($path, 'category');
2696 }
2697
2698
2699 # supported formats:
2700 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2701 #   - if its contents is a number, use it as tag weight,
2702 #   - otherwise add a tag with weight 1
2703 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2704 #   the same value multiple times increases tag weight
2705 # * `gitweb.ctag' multi-valued repo config variable
2706 sub git_get_project_ctags {
2707         my $project = shift;
2708         my $ctags = {};
2709
2710         $git_dir = "$projectroot/$project";
2711         if (opendir my $dh, "$git_dir/ctags") {
2712                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2713                 foreach my $tagfile (@files) {
2714                         open my $ct, '<', $tagfile
2715                                 or next;
2716                         my $val = <$ct>;
2717                         chomp $val if $val;
2718                         close $ct;
2719
2720                         (my $ctag = $tagfile) =~ s#.*/##;
2721                         if ($val =~ /^\d+$/) {
2722                                 $ctags->{$ctag} = $val;
2723                         } else {
2724                                 $ctags->{$ctag} = 1;
2725                         }
2726                 }
2727                 closedir $dh;
2728
2729         } elsif (open my $fh, '<', "$git_dir/ctags") {
2730                 while (my $line = <$fh>) {
2731                         chomp $line;
2732                         $ctags->{$line}++ if $line;
2733                 }
2734                 close $fh;
2735
2736         } else {
2737                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2738                 foreach my $tag (@$taglist) {
2739                         $ctags->{$tag}++;
2740                 }
2741         }
2742
2743         return $ctags;
2744 }
2745
2746 # return hash, where keys are content tags ('ctags'),
2747 # and values are sum of weights of given tag in every project
2748 sub git_gather_all_ctags {
2749         my $projects = shift;
2750         my $ctags = {};
2751
2752         foreach my $p (@$projects) {
2753                 foreach my $ct (keys %{$p->{'ctags'}}) {
2754                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2755                 }
2756         }
2757
2758         return $ctags;
2759 }
2760
2761 sub git_populate_project_tagcloud {
2762         my $ctags = shift;
2763
2764         # First, merge different-cased tags; tags vote on casing
2765         my %ctags_lc;
2766         foreach (keys %$ctags) {
2767                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2768                 if (not $ctags_lc{lc $_}->{topcount}
2769                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2770                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2771                         $ctags_lc{lc $_}->{topname} = $_;
2772                 }
2773         }
2774
2775         my $cloud;
2776         my $matched = $cgi->param('by_tag');
2777         if (eval { require HTML::TagCloud; 1; }) {
2778                 $cloud = HTML::TagCloud->new;
2779                 foreach my $ctag (sort keys %ctags_lc) {
2780                         # Pad the title with spaces so that the cloud looks
2781                         # less crammed.
2782                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2783                         $title =~ s/ /&nbsp;/g;
2784                         $title =~ s/^/&nbsp;/g;
2785                         $title =~ s/$/&nbsp;/g;
2786                         if (defined $matched && $matched eq $ctag) {
2787                                 $title = qq(<span class="match">$title</span>);
2788                         }
2789                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2790                                     $ctags_lc{$ctag}->{count});
2791                 }
2792         } else {
2793                 $cloud = {};
2794                 foreach my $ctag (keys %ctags_lc) {
2795                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2796                         if (defined $matched && $matched eq $ctag) {
2797                                 $title = qq(<span class="match">$title</span>);
2798                         }
2799                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2800                         $cloud->{$ctag}{ctag} =
2801                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2802                 }
2803         }
2804         return $cloud;
2805 }
2806
2807 sub git_show_project_tagcloud {
2808         my ($cloud, $count) = @_;
2809         if (ref $cloud eq 'HTML::TagCloud') {
2810                 return $cloud->html_and_css($count);
2811         } else {
2812                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2813                 return
2814                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2815                         join (', ', map {
2816                                 $cloud->{$_}->{'ctag'}
2817                         } splice(@tags, 0, $count)) .
2818                         '</div>';
2819         }
2820 }
2821
2822 sub git_get_project_url_list {
2823         my $path = shift;
2824
2825         $git_dir = "$projectroot/$path";
2826         open my $fd, '<', "$git_dir/cloneurl"
2827                 or return wantarray ?
2828                 @{ config_to_multi(git_get_project_config('url')) } :
2829                    config_to_multi(git_get_project_config('url'));
2830         my @git_project_url_list = map { chomp; $_ } <$fd>;
2831         close $fd;
2832
2833         return wantarray ? @git_project_url_list : \@git_project_url_list;
2834 }
2835
2836 sub git_get_projects_list {
2837         my $filter = shift || '';
2838         my $paranoid = shift;
2839         my @list;
2840
2841         if (-d $projects_list) {
2842                 # search in directory
2843                 my $dir = $projects_list;
2844                 # remove the trailing "/"
2845                 $dir =~ s!/+$!!;
2846                 my $pfxlen = length("$dir");
2847                 my $pfxdepth = ($dir =~ tr!/!!);
2848                 # when filtering, search only given subdirectory
2849                 if ($filter && !$paranoid) {
2850                         $dir .= "/$filter";
2851                         $dir =~ s!/+$!!;
2852                 }
2853
2854                 File::Find::find({
2855                         follow_fast => 1, # follow symbolic links
2856                         follow_skip => 2, # ignore duplicates
2857                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2858                         wanted => sub {
2859                                 # global variables
2860                                 our $project_maxdepth;
2861                                 our $projectroot;
2862                                 # skip project-list toplevel, if we get it.
2863                                 return if (m!^[/.]$!);
2864                                 # only directories can be git repositories
2865                                 return unless (-d $_);
2866                                 # don't traverse too deep (Find is super slow on os x)
2867                                 # $project_maxdepth excludes depth of $projectroot
2868                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2869                                         $File::Find::prune = 1;
2870                                         return;
2871                                 }
2872
2873                                 my $path = substr($File::Find::name, $pfxlen + 1);
2874                                 # paranoidly only filter here
2875                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2876                                         next;
2877                                 }
2878                                 # we check related file in $projectroot
2879                                 if (check_export_ok("$projectroot/$path")) {
2880                                         push @list, { path => $path };
2881                                         $File::Find::prune = 1;
2882                                 }
2883                         },
2884                 }, "$dir");
2885
2886         } elsif (-f $projects_list) {
2887                 # read from file(url-encoded):
2888                 # 'git%2Fgit.git Linus+Torvalds'
2889                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2890                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2891                 open my $fd, '<', $projects_list or return;
2892         PROJECT:
2893                 while (my $line = <$fd>) {
2894                         chomp $line;
2895                         my ($path, $owner) = split ' ', $line;
2896                         $path = unescape($path);
2897                         $owner = unescape($owner);
2898                         if (!defined $path) {
2899                                 next;
2900                         }
2901                         # if $filter is rpovided, check if $path begins with $filter
2902                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2903                                 next;
2904                         }
2905                         if (check_export_ok("$projectroot/$path")) {
2906                                 my $pr = {
2907                                         path => $path,
2908                                         owner => to_utf8($owner),
2909                                 };
2910                                 push @list, $pr;
2911                         }
2912                 }
2913                 close $fd;
2914         }
2915         return @list;
2916 }
2917
2918 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2919 # as side effects it sets 'forks' field to list of forks for forked projects
2920 sub filter_forks_from_projects_list {
2921         my $projects = shift;
2922
2923         my %trie; # prefix tree of directories (path components)
2924         # generate trie out of those directories that might contain forks
2925         foreach my $pr (@$projects) {
2926                 my $path = $pr->{'path'};
2927                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2928                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2929                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2930                 next unless (-d "$projectroot/$path"); # containing directory exists
2931                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2932
2933                 # add to trie
2934                 my @dirs = split('/', $path);
2935                 # walk the trie, until either runs out of components or out of trie
2936                 my $ref = \%trie;
2937                 while (scalar @dirs &&
2938                        exists($ref->{$dirs[0]})) {
2939                         $ref = $ref->{shift @dirs};
2940                 }
2941                 # create rest of trie structure from rest of components
2942                 foreach my $dir (@dirs) {
2943                         $ref = $ref->{$dir} = {};
2944                 }
2945                 # create end marker, store $pr as a data
2946                 $ref->{''} = $pr if (!exists $ref->{''});
2947         }
2948
2949         # filter out forks, by finding shortest prefix match for paths
2950         my @filtered;
2951  PROJECT:
2952         foreach my $pr (@$projects) {
2953                 # trie lookup
2954                 my $ref = \%trie;
2955         DIR:
2956                 foreach my $dir (split('/', $pr->{'path'})) {
2957                         if (exists $ref->{''}) {
2958                                 # found [shortest] prefix, is a fork - skip it
2959                                 push @{$ref->{''}{'forks'}}, $pr;
2960                                 next PROJECT;
2961                         }
2962                         if (!exists $ref->{$dir}) {
2963                                 # not in trie, cannot have prefix, not a fork
2964                                 push @filtered, $pr;
2965                                 next PROJECT;
2966                         }
2967                         # If the dir is there, we just walk one step down the trie.
2968                         $ref = $ref->{$dir};
2969                 }
2970                 # we ran out of trie
2971                 # (shouldn't happen: it's either no match, or end marker)
2972                 push @filtered, $pr;
2973         }
2974
2975         return @filtered;
2976 }
2977
2978 # note: fill_project_list_info must be run first,
2979 # for 'descr_long' and 'ctags' to be filled
2980 sub search_projects_list {
2981         my ($projlist, %opts) = @_;
2982         my $tagfilter  = $opts{'tagfilter'};
2983         my $searchtext = $opts{'searchtext'};
2984
2985         return @$projlist
2986                 unless ($tagfilter || $searchtext);
2987
2988         my @projects;
2989  PROJECT:
2990         foreach my $pr (@$projlist) {
2991
2992                 if ($tagfilter) {
2993                         next unless ref($pr->{'ctags'}) eq 'HASH';
2994                         next unless
2995                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2996                 }
2997
2998                 if ($searchtext) {
2999                         next unless
3000                                 $pr->{'path'} =~ /$searchtext/ ||
3001                                 $pr->{'descr_long'} =~ /$searchtext/;
3002                 }
3003
3004                 push @projects, $pr;
3005         }
3006
3007         return @projects;
3008 }
3009
3010 our $gitweb_project_owner = undef;
3011 sub git_get_project_list_from_file {
3012
3013         return if (defined $gitweb_project_owner);
3014
3015         $gitweb_project_owner = {};
3016         # read from file (url-encoded):
3017         # 'git%2Fgit.git Linus+Torvalds'
3018         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3019         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3020         if (-f $projects_list) {
3021                 open(my $fd, '<', $projects_list);
3022                 while (my $line = <$fd>) {
3023                         chomp $line;
3024                         my ($pr, $ow) = split ' ', $line;
3025                         $pr = unescape($pr);
3026                         $ow = unescape($ow);
3027                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3028                 }
3029                 close $fd;
3030         }
3031 }
3032
3033 sub git_get_project_owner {
3034         my $project = shift;
3035         my $owner;
3036
3037         return undef unless $project;
3038         $git_dir = "$projectroot/$project";
3039
3040         if (!defined $gitweb_project_owner) {
3041                 git_get_project_list_from_file();
3042         }
3043
3044         if (exists $gitweb_project_owner->{$project}) {
3045                 $owner = $gitweb_project_owner->{$project};
3046         }
3047         if (!defined $owner){
3048                 $owner = git_get_project_config('owner');
3049         }
3050         if (!defined $owner) {
3051                 $owner = get_file_owner("$git_dir");
3052         }
3053
3054         return $owner;
3055 }
3056
3057 sub git_get_last_activity {
3058         my ($path) = @_;
3059         my $fd;
3060
3061         $git_dir = "$projectroot/$path";
3062         open($fd, "-|", git_cmd(), 'for-each-ref',
3063              '--format=%(committer)',
3064              '--sort=-committerdate',
3065              '--count=1',
3066              'refs/heads') or return;
3067         my $most_recent = <$fd>;
3068         close $fd or return;
3069         if (defined $most_recent &&
3070             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3071                 my $timestamp = $1;
3072                 my $age = time - $timestamp;
3073                 return ($age, age_string($age));
3074         }
3075         return (undef, undef);
3076 }
3077
3078 # Implementation note: when a single remote is wanted, we cannot use 'git
3079 # remote show -n' because that command always work (assuming it's a remote URL
3080 # if it's not defined), and we cannot use 'git remote show' because that would
3081 # try to make a network roundtrip. So the only way to find if that particular
3082 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3083 # and when we find what we want.
3084 sub git_get_remotes_list {
3085         my $wanted = shift;
3086         my %remotes = ();
3087
3088         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3089         return unless $fd;
3090         while (my $remote = <$fd>) {
3091                 chomp $remote;
3092                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3093                 next if $wanted and not $remote eq $wanted;
3094                 my ($url, $key) = ($1, $2);
3095
3096                 $remotes{$remote} ||= { 'heads' => () };
3097                 $remotes{$remote}{$key} = $url;
3098         }
3099         close $fd or return;
3100         return wantarray ? %remotes : \%remotes;
3101 }
3102
3103 # Takes a hash of remotes as first parameter and fills it by adding the
3104 # available remote heads for each of the indicated remotes.
3105 sub fill_remote_heads {
3106         my $remotes = shift;
3107         my @heads = map { "remotes/$_" } keys %$remotes;
3108         my @remoteheads = git_get_heads_list(undef, @heads);
3109         foreach my $remote (keys %$remotes) {
3110                 $remotes->{$remote}{'heads'} = [ grep {
3111                         $_->{'name'} =~ s!^$remote/!!
3112                         } @remoteheads ];
3113         }
3114 }
3115
3116 sub git_get_references {
3117         my $type = shift || "";
3118         my %refs;
3119         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3120         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3121         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3122                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3123                 or return;
3124
3125         while (my $line = <$fd>) {
3126                 chomp $line;
3127                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3128                         if (defined $refs{$1}) {
3129                                 push @{$refs{$1}}, $2;
3130                         } else {
3131                                 $refs{$1} = [ $2 ];
3132                         }
3133                 }
3134         }
3135         close $fd or return;
3136         return \%refs;
3137 }
3138
3139 sub git_get_rev_name_tags {
3140         my $hash = shift || return undef;
3141
3142         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3143                 or return;
3144         my $name_rev = <$fd>;
3145         close $fd;
3146
3147         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3148                 return $1;
3149         } else {
3150                 # catches also '$hash undefined' output
3151                 return undef;
3152         }
3153 }
3154
3155 ## ----------------------------------------------------------------------
3156 ## parse to hash functions
3157
3158 sub parse_date {
3159         my $epoch = shift;
3160         my $tz = shift || "-0000";
3161
3162         my %date;
3163         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3164         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3165         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3166         $date{'hour'} = $hour;
3167         $date{'minute'} = $min;
3168         $date{'mday'} = $mday;
3169         $date{'day'} = $days[$wday];
3170         $date{'month'} = $months[$mon];
3171         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3172                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3173         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3174                              $mday, $months[$mon], $hour ,$min;
3175         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3176                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3177
3178         my ($tz_sign, $tz_hour, $tz_min) =
3179                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3180         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3181         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3182         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3183         $date{'hour_local'} = $hour;
3184         $date{'minute_local'} = $min;
3185         $date{'tz_local'} = $tz;
3186         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3187                                   1900+$year, $mon+1, $mday,
3188                                   $hour, $min, $sec, $tz);
3189         return %date;
3190 }
3191
3192 sub parse_tag {
3193         my $tag_id = shift;
3194         my %tag;
3195         my @comment;
3196
3197         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3198         $tag{'id'} = $tag_id;
3199         while (my $line = <$fd>) {
3200                 chomp $line;
3201                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3202                         $tag{'object'} = $1;
3203                 } elsif ($line =~ m/^type (.+)$/) {
3204                         $tag{'type'} = $1;
3205                 } elsif ($line =~ m/^tag (.+)$/) {
3206                         $tag{'name'} = $1;
3207                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3208                         $tag{'author'} = $1;
3209                         $tag{'author_epoch'} = $2;
3210                         $tag{'author_tz'} = $3;
3211                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3212                                 $tag{'author_name'}  = $1;
3213                                 $tag{'author_email'} = $2;
3214                         } else {
3215                                 $tag{'author_name'} = $tag{'author'};
3216                         }
3217                 } elsif ($line =~ m/--BEGIN/) {
3218                         push @comment, $line;
3219                         last;
3220                 } elsif ($line eq "") {
3221                         last;
3222                 }
3223         }
3224         push @comment, <$fd>;
3225         $tag{'comment'} = \@comment;
3226         close $fd or return;
3227         if (!defined $tag{'name'}) {
3228                 return
3229         };
3230         return %tag
3231 }
3232
3233 sub parse_commit_text {
3234         my ($commit_text, $withparents) = @_;
3235         my @commit_lines = split '\n', $commit_text;
3236         my %co;
3237
3238         pop @commit_lines; # Remove '\0'
3239
3240         if (! @commit_lines) {
3241                 return;
3242         }
3243
3244         my $header = shift @commit_lines;
3245         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3246                 return;
3247         }
3248         ($co{'id'}, my @parents) = split ' ', $header;
3249         while (my $line = shift @commit_lines) {
3250                 last if $line eq "\n";
3251                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3252                         $co{'tree'} = $1;
3253                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3254                         push @parents, $1;
3255                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3256                         $co{'author'} = to_utf8($1);
3257                         $co{'author_epoch'} = $2;
3258                         $co{'author_tz'} = $3;
3259                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3260                                 $co{'author_name'}  = $1;
3261                                 $co{'author_email'} = $2;
3262                         } else {
3263                                 $co{'author_name'} = $co{'author'};
3264                         }
3265                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3266                         $co{'committer'} = to_utf8($1);
3267                         $co{'committer_epoch'} = $2;
3268                         $co{'committer_tz'} = $3;
3269                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3270                                 $co{'committer_name'}  = $1;
3271                                 $co{'committer_email'} = $2;
3272                         } else {
3273                                 $co{'committer_name'} = $co{'committer'};
3274                         }
3275                 }
3276         }
3277         if (!defined $co{'tree'}) {
3278                 return;
3279         };
3280         $co{'parents'} = \@parents;
3281         $co{'parent'} = $parents[0];
3282
3283         foreach my $title (@commit_lines) {
3284                 $title =~ s/^    //;
3285                 if ($title ne "") {
3286                         $co{'title'} = chop_str($title, 80, 5);
3287                         # remove leading stuff of merges to make the interesting part visible
3288                         if (length($title) > 50) {
3289                                 $title =~ s/^Automatic //;
3290                                 $title =~ s/^merge (of|with) /Merge ... /i;
3291                                 if (length($title) > 50) {
3292                                         $title =~ s/(http|rsync):\/\///;
3293                                 }
3294                                 if (length($title) > 50) {
3295                                         $title =~ s/(master|www|rsync)\.//;
3296                                 }
3297                                 if (length($title) > 50) {
3298                                         $title =~ s/kernel.org:?//;
3299                                 }
3300                                 if (length($title) > 50) {
3301                                         $title =~ s/\/pub\/scm//;
3302                                 }
3303                         }
3304                         $co{'title_short'} = chop_str($title, 50, 5);
3305                         last;
3306                 }
3307         }
3308         if (! defined $co{'title'} || $co{'title'} eq "") {
3309                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3310         }
3311         # remove added spaces
3312         foreach my $line (@commit_lines) {
3313                 $line =~ s/^    //;
3314         }
3315         $co{'comment'} = \@commit_lines;
3316
3317         my $age = time - $co{'committer_epoch'};
3318         $co{'age'} = $age;
3319         $co{'age_string'} = age_string($age);
3320         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3321         if ($age > 60*60*24*7*2) {
3322                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3323                 $co{'age_string_age'} = $co{'age_string'};
3324         } else {
3325                 $co{'age_string_date'} = $co{'age_string'};
3326                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3327         }
3328         return %co;
3329 }
3330
3331 sub parse_commit {
3332         my ($commit_id) = @_;
3333         my %co;
3334
3335         local $/ = "\0";
3336
3337         open my $fd, "-|", git_cmd(), "rev-list",
3338                 "--parents",
3339                 "--header",
3340                 "--max-count=1",
3341                 $commit_id,
3342                 "--",
3343                 or die_error(500, "Open git-rev-list failed");
3344         %co = parse_commit_text(<$fd>, 1);
3345         close $fd;
3346
3347         return %co;
3348 }
3349
3350 sub parse_commits {
3351         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3352         my @cos;
3353
3354         $maxcount ||= 1;
3355         $skip ||= 0;
3356
3357         local $/ = "\0";
3358
3359         open my $fd, "-|", git_cmd(), "rev-list",
3360                 "--header",
3361                 @args,
3362                 ("--max-count=" . $maxcount),
3363                 ("--skip=" . $skip),
3364                 @extra_options,
3365                 $commit_id,
3366                 "--",
3367                 ($filename ? ($filename) : ())
3368                 or die_error(500, "Open git-rev-list failed");
3369         while (my $line = <$fd>) {
3370                 my %co = parse_commit_text($line);
3371                 push @cos, \%co;
3372         }
3373         close $fd;
3374
3375         return wantarray ? @cos : \@cos;
3376 }
3377
3378 # parse line of git-diff-tree "raw" output
3379 sub parse_difftree_raw_line {
3380         my $line = shift;
3381         my %res;
3382
3383         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3384         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3385         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3386                 $res{'from_mode'} = $1;
3387                 $res{'to_mode'} = $2;
3388                 $res{'from_id'} = $3;
3389                 $res{'to_id'} = $4;
3390                 $res{'status'} = $5;
3391                 $res{'similarity'} = $6;
3392                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3393                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3394                 } else {
3395                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3396                 }
3397         }
3398         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3399         # combined diff (for merge commit)
3400         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3401                 $res{'nparents'}  = length($1);
3402                 $res{'from_mode'} = [ split(' ', $2) ];
3403                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3404                 $res{'from_id'} = [ split(' ', $3) ];
3405                 $res{'to_id'} = pop @{$res{'from_id'}};
3406                 $res{'status'} = [ split('', $4) ];
3407                 $res{'to_file'} = unquote($5);
3408         }
3409         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3410         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3411                 $res{'commit'} = $1;
3412         }
3413
3414         return wantarray ? %res : \%res;
3415 }
3416
3417 # wrapper: return parsed line of git-diff-tree "raw" output
3418 # (the argument might be raw line, or parsed info)
3419 sub parsed_difftree_line {
3420         my $line_or_ref = shift;
3421
3422         if (ref($line_or_ref) eq "HASH") {
3423                 # pre-parsed (or generated by hand)
3424                 return $line_or_ref;
3425         } else {
3426                 return parse_difftree_raw_line($line_or_ref);
3427         }
3428 }
3429
3430 # parse line of git-ls-tree output
3431 sub parse_ls_tree_line {
3432         my $line = shift;
3433         my %opts = @_;
3434         my %res;
3435
3436         if ($opts{'-l'}) {
3437                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3438                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3439
3440                 $res{'mode'} = $1;
3441                 $res{'type'} = $2;
3442                 $res{'hash'} = $3;
3443                 $res{'size'} = $4;
3444                 if ($opts{'-z'}) {
3445                         $res{'name'} = $5;
3446                 } else {
3447                         $res{'name'} = unquote($5);
3448                 }
3449         } else {
3450                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3451                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3452
3453                 $res{'mode'} = $1;
3454                 $res{'type'} = $2;
3455                 $res{'hash'} = $3;
3456                 if ($opts{'-z'}) {
3457                         $res{'name'} = $4;
3458                 } else {
3459                         $res{'name'} = unquote($4);
3460                 }
3461         }
3462
3463         return wantarray ? %res : \%res;
3464 }
3465
3466 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3467 sub parse_from_to_diffinfo {
3468         my ($diffinfo, $from, $to, @parents) = @_;
3469
3470         if ($diffinfo->{'nparents'}) {
3471                 # combined diff
3472                 $from->{'file'} = [];
3473                 $from->{'href'} = [];
3474                 fill_from_file_info($diffinfo, @parents)
3475                         unless exists $diffinfo->{'from_file'};
3476                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3477                         $from->{'file'}[$i] =
3478                                 defined $diffinfo->{'from_file'}[$i] ?
3479                                         $diffinfo->{'from_file'}[$i] :
3480                                         $diffinfo->{'to_file'};
3481                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3482                                 $from->{'href'}[$i] = href(action=>"blob",
3483                                                            hash_base=>$parents[$i],
3484                                                            hash=>$diffinfo->{'from_id'}[$i],
3485                                                            file_name=>$from->{'file'}[$i]);
3486                         } else {
3487                                 $from->{'href'}[$i] = undef;
3488                         }
3489                 }
3490         } else {
3491                 # ordinary (not combined) diff
3492                 $from->{'file'} = $diffinfo->{'from_file'};
3493                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3494                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3495                                                hash=>$diffinfo->{'from_id'},
3496                                                file_name=>$from->{'file'});
3497                 } else {
3498                         delete $from->{'href'};
3499                 }
3500         }
3501
3502         $to->{'file'} = $diffinfo->{'to_file'};
3503         if (!is_deleted($diffinfo)) { # file exists in result
3504                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3505                                      hash=>$diffinfo->{'to_id'},
3506                                      file_name=>$to->{'file'});
3507         } else {
3508                 delete $to->{'href'};
3509         }
3510 }
3511
3512 ## ......................................................................
3513 ## parse to array of hashes functions
3514
3515 sub git_get_heads_list {
3516         my ($limit, @classes) = @_;
3517         @classes = ('heads') unless @classes;
3518         my @patterns = map { "refs/$_" } @classes;
3519         my @headslist;
3520
3521         open my $fd, '-|', git_cmd(), 'for-each-ref',
3522                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3523                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3524                 @patterns
3525                 or return;
3526         while (my $line = <$fd>) {
3527                 my %ref_item;
3528
3529                 chomp $line;
3530                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3531                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3532                 my ($committer, $epoch, $tz) =
3533                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3534                 $ref_item{'fullname'}  = $name;
3535                 $name =~ s!^refs/(?:head|remote)s/!!;
3536
3537                 $ref_item{'name'}  = $name;
3538                 $ref_item{'id'}    = $hash;
3539                 $ref_item{'title'} = $title || '(no commit message)';
3540                 $ref_item{'epoch'} = $epoch;
3541                 if ($epoch) {
3542                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3543                 } else {
3544                         $ref_item{'age'} = "unknown";
3545                 }
3546
3547                 push @headslist, \%ref_item;
3548         }
3549         close $fd;
3550
3551         return wantarray ? @headslist : \@headslist;
3552 }
3553
3554 sub git_get_tags_list {
3555         my $limit = shift;
3556         my @tagslist;
3557
3558         open my $fd, '-|', git_cmd(), 'for-each-ref',
3559                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3560                 '--format=%(objectname) %(objecttype) %(refname) '.
3561                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3562                 'refs/tags'
3563                 or return;
3564         while (my $line = <$fd>) {
3565                 my %ref_item;
3566
3567                 chomp $line;
3568                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3569                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3570                 my ($creator, $epoch, $tz) =
3571                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3572                 $ref_item{'fullname'} = $name;
3573                 $name =~ s!^refs/tags/!!;
3574
3575                 $ref_item{'type'} = $type;
3576                 $ref_item{'id'} = $id;
3577                 $ref_item{'name'} = $name;
3578                 if ($type eq "tag") {
3579                         $ref_item{'subject'} = $title;
3580                         $ref_item{'reftype'} = $reftype;
3581                         $ref_item{'refid'}   = $refid;
3582                 } else {
3583                         $ref_item{'reftype'} = $type;
3584                         $ref_item{'refid'}   = $id;
3585                 }
3586
3587                 if ($type eq "tag" || $type eq "commit") {
3588                         $ref_item{'epoch'} = $epoch;
3589                         if ($epoch) {
3590                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3591                         } else {
3592                                 $ref_item{'age'} = "unknown";
3593                         }
3594                 }
3595
3596                 push @tagslist, \%ref_item;
3597         }
3598         close $fd;
3599
3600         return wantarray ? @tagslist : \@tagslist;
3601 }
3602
3603 ## ----------------------------------------------------------------------
3604 ## filesystem-related functions
3605
3606 sub get_file_owner {
3607         my $path = shift;
3608
3609         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3610         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3611         if (!defined $gcos) {
3612                 return undef;
3613         }
3614         my $owner = $gcos;
3615         $owner =~ s/[,;].*$//;
3616         return to_utf8($owner);
3617 }
3618
3619 # assume that file exists
3620 sub insert_file {
3621         my $filename = shift;
3622
3623         open my $fd, '<', $filename;
3624         print map { to_utf8($_) } <$fd>;
3625         close $fd;
3626 }
3627
3628 ## ......................................................................
3629 ## mimetype related functions
3630
3631 sub mimetype_guess_file {
3632         my $filename = shift;
3633         my $mimemap = shift;
3634         -r $mimemap or return undef;
3635
3636         my %mimemap;
3637         open(my $mh, '<', $mimemap) or return undef;
3638         while (<$mh>) {
3639                 next if m/^#/; # skip comments
3640                 my ($mimetype, @exts) = split(/\s+/);
3641                 foreach my $ext (@exts) {
3642                         $mimemap{$ext} = $mimetype;
3643                 }
3644         }
3645         close($mh);
3646
3647         $filename =~ /\.([^.]*)$/;
3648         return $mimemap{$1};
3649 }
3650
3651 sub mimetype_guess {
3652         my $filename = shift;
3653         my $mime;
3654         $filename =~ /\./ or return undef;
3655
3656         if ($mimetypes_file) {
3657                 my $file = $mimetypes_file;
3658                 if ($file !~ m!^/!) { # if it is relative path
3659                         # it is relative to project
3660                         $file = "$projectroot/$project/$file";
3661                 }
3662                 $mime = mimetype_guess_file($filename, $file);
3663         }
3664         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3665         return $mime;
3666 }
3667
3668 sub blob_mimetype {
3669         my $fd = shift;
3670         my $filename = shift;
3671
3672         if ($filename) {
3673                 my $mime = mimetype_guess($filename);
3674                 $mime and return $mime;
3675         }
3676
3677         # just in case
3678         return $default_blob_plain_mimetype unless $fd;
3679
3680         if (-T $fd) {
3681                 return 'text/plain';
3682         } elsif (! $filename) {
3683                 return 'application/octet-stream';
3684         } elsif ($filename =~ m/\.png$/i) {
3685                 return 'image/png';
3686         } elsif ($filename =~ m/\.gif$/i) {
3687                 return 'image/gif';
3688         } elsif ($filename =~ m/\.jpe?g$/i) {
3689                 return 'image/jpeg';
3690         } else {
3691                 return 'application/octet-stream';
3692         }
3693 }
3694
3695 sub blob_contenttype {
3696         my ($fd, $file_name, $type) = @_;
3697
3698         $type ||= blob_mimetype($fd, $file_name);
3699         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3700                 $type .= "; charset=$default_text_plain_charset";
3701         }
3702
3703         return $type;
3704 }
3705
3706 # guess file syntax for syntax highlighting; return undef if no highlighting
3707 # the name of syntax can (in the future) depend on syntax highlighter used
3708 sub guess_file_syntax {
3709         my ($highlight, $mimetype, $file_name) = @_;
3710         return undef unless ($highlight && defined $file_name);
3711         my $basename = basename($file_name, '.in');
3712         return $highlight_basename{$basename}
3713                 if exists $highlight_basename{$basename};
3714
3715         $basename =~ /\.([^.]*)$/;
3716         my $ext = $1 or return undef;
3717         return $highlight_ext{$ext}
3718                 if exists $highlight_ext{$ext};
3719
3720         return undef;
3721 }
3722
3723 # run highlighter and return FD of its output,
3724 # or return original FD if no highlighting
3725 sub run_highlighter {
3726         my ($fd, $highlight, $syntax) = @_;
3727         return $fd unless ($highlight && defined $syntax);
3728
3729         close $fd;
3730         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3731                   quote_command($highlight_bin).
3732                   " --replace-tabs=8 --fragment --syntax $syntax |"
3733                 or die_error(500, "Couldn't open file or run syntax highlighter");
3734         return $fd;
3735 }
3736
3737 ## ======================================================================
3738 ## functions printing HTML: header, footer, error page
3739
3740 sub get_page_title {
3741         my $title = to_utf8($site_name);
3742
3743         unless (defined $project) {
3744                 if (defined $project_filter) {
3745                         $title .= " - " . to_utf8($project_filter);
3746                 }
3747                 return $title;
3748         }
3749         $title .= " - " . to_utf8($project);
3750
3751         return $title unless (defined $action);
3752         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3753
3754         return $title unless (defined $file_name);
3755         $title .= " - " . esc_path($file_name);
3756         if ($action eq "tree" && $file_name !~ m|/$|) {
3757                 $title .= "/";
3758         }
3759
3760         return $title;
3761 }
3762
3763 sub get_content_type_html {
3764         # require explicit support from the UA if we are to send the page as
3765         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3766         # we have to do this because MSIE sometimes globs '*/*', pretending to
3767         # support xhtml+xml but choking when it gets what it asked for.
3768         if (defined $cgi->http('HTTP_ACCEPT') &&
3769             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3770             $cgi->Accept('application/xhtml+xml') != 0) {
3771                 return 'application/xhtml+xml';
3772         } else {
3773                 return 'text/html';
3774         }
3775 }
3776
3777 sub print_feed_meta {
3778         if (defined $project) {
3779                 my %href_params = get_feed_info();
3780                 if (!exists $href_params{'-title'}) {
3781                         $href_params{'-title'} = 'log';
3782                 }
3783
3784                 foreach my $format (qw(RSS Atom)) {
3785                         my $type = lc($format);
3786                         my %link_attr = (
3787                                 '-rel' => 'alternate',
3788                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3789                                 '-type' => "application/$type+xml"
3790                         );
3791
3792                         $href_params{'action'} = $type;
3793                         $link_attr{'-href'} = href(%href_params);
3794                         print "<link ".
3795                               "rel=\"$link_attr{'-rel'}\" ".
3796                               "title=\"$link_attr{'-title'}\" ".
3797                               "href=\"$link_attr{'-href'}\" ".
3798                               "type=\"$link_attr{'-type'}\" ".
3799                               "/>\n";
3800
3801                         $href_params{'extra_options'} = '--no-merges';
3802                         $link_attr{'-href'} = href(%href_params);
3803                         $link_attr{'-title'} .= ' (no merges)';
3804                         print "<link ".
3805                               "rel=\"$link_attr{'-rel'}\" ".
3806                               "title=\"$link_attr{'-title'}\" ".
3807                               "href=\"$link_attr{'-href'}\" ".
3808                               "type=\"$link_attr{'-type'}\" ".
3809                               "/>\n";
3810                 }
3811
3812         } else {
3813                 printf('<link rel="alternate" title="%s projects list" '.
3814                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3815                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3816                 printf('<link rel="alternate" title="%s projects feeds" '.
3817                        'href="%s" type="text/x-opml" />'."\n",
3818                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3819         }
3820 }
3821
3822 sub print_header_links {
3823         my $status = shift;
3824
3825         # print out each stylesheet that exist, providing backwards capability
3826         # for those people who defined $stylesheet in a config file
3827         if (defined $stylesheet) {
3828                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3829         } else {
3830                 foreach my $stylesheet (@stylesheets) {
3831                         next unless $stylesheet;
3832                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3833                 }
3834         }
3835         print_feed_meta()
3836                 if ($status eq '200 OK');
3837         if (defined $favicon) {
3838                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3839         }
3840 }
3841
3842 sub print_nav_breadcrumbs_path {
3843         my $dirprefix = undef;
3844         while (my $part = shift) {
3845                 $dirprefix .= "/" if defined $dirprefix;
3846                 $dirprefix .= $part;
3847                 print $cgi->a({-href => href(project => undef,
3848                                              project_filter => $dirprefix,
3849                                              action => "project_list")},
3850                               esc_html($part)) . " / ";
3851         }
3852 }
3853
3854 sub print_nav_breadcrumbs {
3855         my %opts = @_;
3856
3857         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3858         if (defined $project) {
3859                 my @dirname = split '/', $project;
3860                 my $projectbasename = pop @dirname;
3861                 print_nav_breadcrumbs_path(@dirname);
3862                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3863                 if (defined $action) {
3864                         my $action_print = $action ;
3865                         if (defined $opts{-action_extra}) {
3866                                 $action_print = $cgi->a({-href => href(action=>$action)},
3867                                         $action);
3868                         }
3869                         print " / $action_print";
3870                 }
3871                 if (defined $opts{-action_extra}) {
3872                         print " / $opts{-action_extra}";
3873                 }
3874                 print "\n";
3875         } elsif (defined $project_filter) {
3876                 print_nav_breadcrumbs_path(split '/', $project_filter);
3877         }
3878 }
3879
3880 sub print_search_form {
3881         if (!defined $searchtext) {
3882                 $searchtext = "";
3883         }
3884         my $search_hash;
3885         if (defined $hash_base) {
3886                 $search_hash = $hash_base;
3887         } elsif (defined $hash) {
3888                 $search_hash = $hash;
3889         } else {
3890                 $search_hash = "HEAD";
3891         }
3892         my $action = $my_uri;
3893         my $use_pathinfo = gitweb_check_feature('pathinfo');
3894         if ($use_pathinfo) {
3895                 $action .= "/".esc_url($project);
3896         }
3897         print $cgi->startform(-method => "get", -action => $action) .
3898               "<div class=\"search\">\n" .
3899               (!$use_pathinfo &&
3900               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3901               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3902               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3903               $cgi->popup_menu(-name => 'st', -default => 'commit',
3904                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3905               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3906               " search:\n",
3907               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3908               "<span title=\"Extended regular expression\">" .
3909               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3910                              -checked => $search_use_regexp) .
3911               "</span>" .
3912               "</div>" .
3913               $cgi->end_form() . "\n";
3914 }
3915
3916 sub git_header_html {
3917         my $status = shift || "200 OK";
3918         my $expires = shift;
3919         my %opts = @_;
3920
3921         my $title = get_page_title();
3922         my $content_type = get_content_type_html();
3923         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3924                            -status=> $status, -expires => $expires)
3925                 unless ($opts{'-no_http_header'});
3926         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3927         print <<EOF;
3928 <?xml version="1.0" encoding="utf-8"?>
3929 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3930 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3931 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3932 <!-- git core binaries version $git_version -->
3933 <head>
3934 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3935 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3936 <meta name="robots" content="index, nofollow"/>
3937 <title>$title</title>
3938 EOF
3939         # the stylesheet, favicon etc urls won't work correctly with path_info
3940         # unless we set the appropriate base URL
3941         if ($ENV{'PATH_INFO'}) {
3942                 print "<base href=\"".esc_url($base_url)."\" />\n";
3943         }
3944         print_header_links($status);
3945
3946         if (defined $site_html_head_string) {
3947                 print to_utf8($site_html_head_string);
3948         }
3949
3950         print "</head>\n" .
3951               "<body>\n";
3952
3953         if (defined $site_header && -f $site_header) {
3954                 insert_file($site_header);
3955         }
3956
3957         print "<div class=\"page_header\">\n";
3958         if (defined $logo) {
3959                 print $cgi->a({-href => esc_url($logo_url),
3960                                -title => $logo_label},
3961                               $cgi->img({-src => esc_url($logo),
3962                                          -width => 72, -height => 27,
3963                                          -alt => "git",
3964                                          -class => "logo"}));
3965         }
3966         print_nav_breadcrumbs(%opts);
3967         print "</div>\n";
3968
3969         my $have_search = gitweb_check_feature('search');
3970         if (defined $project && $have_search) {
3971                 print_search_form();
3972         }
3973 }
3974
3975 sub git_footer_html {
3976         my $feed_class = 'rss_logo';
3977
3978         print "<div class=\"page_footer\">\n";
3979         if (defined $project) {
3980                 my $descr = git_get_project_description($project);
3981                 if (defined $descr) {
3982                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3983                 }
3984
3985                 my %href_params = get_feed_info();
3986                 if (!%href_params) {
3987                         $feed_class .= ' generic';
3988                 }
3989                 $href_params{'-title'} ||= 'log';
3990
3991                 foreach my $format (qw(RSS Atom)) {
3992                         $href_params{'action'} = lc($format);
3993                         print $cgi->a({-href => href(%href_params),
3994                                       -title => "$href_params{'-title'} $format feed",
3995                                       -class => $feed_class}, $format)."\n";
3996                 }
3997
3998         } else {
3999                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4000                                              project_filter => $project_filter),
4001                               -class => $feed_class}, "OPML") . " ";
4002                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4003                                              project_filter => $project_filter),
4004                               -class => $feed_class}, "TXT") . "\n";
4005         }
4006         print "</div>\n"; # class="page_footer"
4007
4008         if (defined $t0 && gitweb_check_feature('timed')) {
4009                 print "<div id=\"generating_info\">\n";
4010                 print 'This page took '.
4011                       '<span id="generating_time" class="time_span">'.
4012                       tv_interval($t0, [ gettimeofday() ]).
4013                       ' seconds </span>'.
4014                       ' and '.
4015                       '<span id="generating_cmd">'.
4016                       $number_of_git_cmds.
4017                       '</span> git commands '.
4018                       " to generate.\n";
4019                 print "</div>\n"; # class="page_footer"
4020         }
4021
4022         if (defined $site_footer && -f $site_footer) {
4023                 insert_file($site_footer);
4024         }
4025
4026         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4027         if (defined $action &&
4028             $action eq 'blame_incremental') {
4029                 print qq!<script type="text/javascript">\n!.
4030                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4031                       qq!           "!. href() .qq!");\n!.
4032                       qq!</script>\n!;
4033         } else {
4034                 my ($jstimezone, $tz_cookie, $datetime_class) =
4035                         gitweb_get_feature('javascript-timezone');
4036
4037                 print qq!<script type="text/javascript">\n!.
4038                       qq!window.onload = function () {\n!;
4039                 if (gitweb_check_feature('javascript-actions')) {
4040                         print qq!       fixLinks();\n!;
4041                 }
4042                 if ($jstimezone && $tz_cookie && $datetime_class) {
4043                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4044                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4045                 }
4046                 print qq!};\n!.
4047                       qq!</script>\n!;
4048         }
4049
4050         print "</body>\n" .
4051               "</html>";
4052 }
4053
4054 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4055 # Example: die_error(404, 'Hash not found')
4056 # By convention, use the following status codes (as defined in RFC 2616):
4057 # 400: Invalid or missing CGI parameters, or
4058 #      requested object exists but has wrong type.
4059 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4060 #      this server or project.
4061 # 404: Requested object/revision/project doesn't exist.
4062 # 500: The server isn't configured properly, or
4063 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4064 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4065 # 503: The server is currently unavailable (because it is overloaded,
4066 #      or down for maintenance).  Generally, this is a temporary state.
4067 sub die_error {
4068         my $status = shift || 500;
4069         my $error = esc_html(shift) || "Internal Server Error";
4070         my $extra = shift;
4071         my %opts = @_;
4072
4073         my %http_responses = (
4074                 400 => '400 Bad Request',
4075                 403 => '403 Forbidden',
4076                 404 => '404 Not Found',
4077                 500 => '500 Internal Server Error',
4078                 503 => '503 Service Unavailable',
4079         );
4080         git_header_html($http_responses{$status}, undef, %opts);
4081         print <<EOF;
4082 <div class="page_body">
4083 <br /><br />
4084 $status - $error
4085 <br />
4086 EOF
4087         if (defined $extra) {
4088                 print "<hr />\n" .
4089                       "$extra\n";
4090         }
4091         print "</div>\n";
4092
4093         git_footer_html();
4094         goto DONE_GITWEB
4095                 unless ($opts{'-error_handler'});
4096 }
4097
4098 ## ----------------------------------------------------------------------
4099 ## functions printing or outputting HTML: navigation
4100
4101 sub git_print_page_nav {
4102         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4103         $extra = '' if !defined $extra; # pager or formats
4104
4105         my @navs = qw(summary shortlog log commit commitdiff tree);
4106         if ($suppress) {
4107                 @navs = grep { $_ ne $suppress } @navs;
4108         }
4109
4110         my %arg = map { $_ => {action=>$_} } @navs;
4111         if (defined $head) {
4112                 for (qw(commit commitdiff)) {
4113                         $arg{$_}{'hash'} = $head;
4114                 }
4115                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4116                         for (qw(shortlog log)) {
4117                                 $arg{$_}{'hash'} = $head;
4118                         }
4119                 }
4120         }
4121
4122         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4123         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4124
4125         my @actions = gitweb_get_feature('actions');
4126         my %repl = (
4127                 '%' => '%',
4128                 'n' => $project,         # project name
4129                 'f' => $git_dir,         # project path within filesystem
4130                 'h' => $treehead || '',  # current hash ('h' parameter)
4131                 'b' => $treebase || '',  # hash base ('hb' parameter)
4132         );
4133         while (@actions) {
4134                 my ($label, $link, $pos) = splice(@actions,0,3);
4135                 # insert
4136                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4137                 # munch munch
4138                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4139                 $arg{$label}{'_href'} = $link;
4140         }
4141
4142         print "<div class=\"page_nav\">\n" .
4143                 (join " | ",
4144                  map { $_ eq $current ?
4145                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4146                  } @navs);
4147         print "<br/>\n$extra<br/>\n" .
4148               "</div>\n";
4149 }
4150
4151 # returns a submenu for the nagivation of the refs views (tags, heads,
4152 # remotes) with the current view disabled and the remotes view only
4153 # available if the feature is enabled
4154 sub format_ref_views {
4155         my ($current) = @_;
4156         my @ref_views = qw{tags heads};
4157         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4158         return join " | ", map {
4159                 $_ eq $current ? $_ :
4160                 $cgi->a({-href => href(action=>$_)}, $_)
4161         } @ref_views
4162 }
4163
4164 sub format_paging_nav {
4165         my ($action, $page, $has_next_link) = @_;
4166         my $paging_nav;
4167
4168
4169         if ($page > 0) {
4170                 $paging_nav .=
4171                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4172                         " &sdot; " .
4173                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4174                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4175         } else {
4176                 $paging_nav .= "first &sdot; prev";
4177         }
4178
4179         if ($has_next_link) {
4180                 $paging_nav .= " &sdot; " .
4181                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4182                                  -accesskey => "n", -title => "Alt-n"}, "next");
4183         } else {
4184                 $paging_nav .= " &sdot; next";
4185         }
4186
4187         return $paging_nav;
4188 }
4189
4190 ## ......................................................................
4191 ## functions printing or outputting HTML: div
4192
4193 sub git_print_header_div {
4194         my ($action, $title, $hash, $hash_base) = @_;
4195         my %args = ();
4196
4197         $args{'action'} = $action;
4198         $args{'hash'} = $hash if $hash;
4199         $args{'hash_base'} = $hash_base if $hash_base;
4200
4201         print "<div class=\"header\">\n" .
4202               $cgi->a({-href => href(%args), -class => "title"},
4203               $title ? $title : $action) .
4204               "\n</div>\n";
4205 }
4206
4207 sub format_repo_url {
4208         my ($name, $url) = @_;
4209         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4210 }
4211
4212 # Group output by placing it in a DIV element and adding a header.
4213 # Options for start_div() can be provided by passing a hash reference as the
4214 # first parameter to the function.
4215 # Options to git_print_header_div() can be provided by passing an array
4216 # reference. This must follow the options to start_div if they are present.
4217 # The content can be a scalar, which is output as-is, a scalar reference, which
4218 # is output after html escaping, an IO handle passed either as *handle or
4219 # *handle{IO}, or a function reference. In the latter case all following
4220 # parameters will be taken as argument to the content function call.
4221 sub git_print_section {
4222         my ($div_args, $header_args, $content);
4223         my $arg = shift;
4224         if (ref($arg) eq 'HASH') {
4225                 $div_args = $arg;
4226                 $arg = shift;
4227         }
4228         if (ref($arg) eq 'ARRAY') {
4229                 $header_args = $arg;
4230                 $arg = shift;
4231         }
4232         $content = $arg;
4233
4234         print $cgi->start_div($div_args);
4235         git_print_header_div(@$header_args);
4236
4237         if (ref($content) eq 'CODE') {
4238                 $content->(@_);
4239         } elsif (ref($content) eq 'SCALAR') {
4240                 print esc_html($$content);
4241         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4242                 print <$content>;
4243         } elsif (!ref($content) && defined($content)) {
4244                 print $content;
4245         }
4246
4247         print $cgi->end_div;
4248 }
4249
4250 sub format_timestamp_html {
4251         my $date = shift;
4252         my $strtime = $date->{'rfc2822'};
4253
4254         my (undef, undef, $datetime_class) =
4255                 gitweb_get_feature('javascript-timezone');
4256         if ($datetime_class) {
4257                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4258         }
4259
4260         my $localtime_format = '(%02d:%02d %s)';
4261         if ($date->{'hour_local'} < 6) {
4262                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4263         }
4264         $strtime .= ' ' .
4265                     sprintf($localtime_format,
4266                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4267
4268         return $strtime;
4269 }
4270
4271 # Outputs the author name and date in long form
4272 sub git_print_authorship {
4273         my $co = shift;
4274         my %opts = @_;
4275         my $tag = $opts{-tag} || 'div';
4276         my $author = $co->{'author_name'};
4277
4278         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4279         print "<$tag class=\"author_date\">" .
4280               format_search_author($author, "author", esc_html($author)) .
4281               " [".format_timestamp_html(\%ad)."]".
4282               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4283               "</$tag>\n";
4284 }
4285
4286 # Outputs table rows containing the full author or committer information,
4287 # in the format expected for 'commit' view (& similar).
4288 # Parameters are a commit hash reference, followed by the list of people
4289 # to output information for. If the list is empty it defaults to both
4290 # author and committer.
4291 sub git_print_authorship_rows {
4292         my $co = shift;
4293         # too bad we can't use @people = @_ || ('author', 'committer')
4294         my @people = @_;
4295         @people = ('author', 'committer') unless @people;
4296         foreach my $who (@people) {
4297                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4298                 print "<tr><td>$who</td><td>" .
4299                       format_search_author($co->{"${who}_name"}, $who,
4300                                            esc_html($co->{"${who}_name"})) . " " .
4301                       format_search_author($co->{"${who}_email"}, $who,
4302                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4303                       "</td><td rowspan=\"2\">" .
4304                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4305                       "</td></tr>\n" .
4306                       "<tr>" .
4307                       "<td></td><td>" .
4308                       format_timestamp_html(\%wd) .
4309                       "</td>" .
4310                       "</tr>\n";
4311         }
4312 }
4313
4314 sub git_print_page_path {
4315         my $name = shift;
4316         my $type = shift;
4317         my $hb = shift;
4318
4319
4320         print "<div class=\"page_path\">";
4321         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4322                       -title => 'tree root'}, to_utf8("[$project]"));
4323         print " / ";
4324         if (defined $name) {
4325                 my @dirname = split '/', $name;
4326                 my $basename = pop @dirname;
4327                 my $fullname = '';
4328
4329                 foreach my $dir (@dirname) {
4330                         $fullname .= ($fullname ? '/' : '') . $dir;
4331                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4332                                                      hash_base=>$hb),
4333                                       -title => $fullname}, esc_path($dir));
4334                         print " / ";
4335                 }
4336                 if (defined $type && $type eq 'blob') {
4337                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4338                                                      hash_base=>$hb),
4339                                       -title => $name}, esc_path($basename));
4340                 } elsif (defined $type && $type eq 'tree') {
4341                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4342                                                      hash_base=>$hb),
4343                                       -title => $name}, esc_path($basename));
4344                         print " / ";
4345                 } else {
4346                         print esc_path($basename);
4347                 }
4348         }
4349         print "<br/></div>\n";
4350 }
4351
4352 sub git_print_log {
4353         my $log = shift;
4354         my %opts = @_;
4355
4356         if ($opts{'-remove_title'}) {
4357                 # remove title, i.e. first line of log
4358                 shift @$log;
4359         }
4360         # remove leading empty lines
4361         while (defined $log->[0] && $log->[0] eq "") {
4362                 shift @$log;
4363         }
4364
4365         # print log
4366         my $signoff = 0;
4367         my $empty = 0;
4368         foreach my $line (@$log) {
4369                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4370                         $signoff = 1;
4371                         $empty = 0;
4372                         if (! $opts{'-remove_signoff'}) {
4373                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4374                                 next;
4375                         } else {
4376                                 # remove signoff lines
4377                                 next;
4378                         }
4379                 } else {
4380                         $signoff = 0;
4381                 }
4382
4383                 # print only one empty line
4384                 # do not print empty line after signoff
4385                 if ($line eq "") {
4386                         next if ($empty || $signoff);
4387                         $empty = 1;
4388                 } else {
4389                         $empty = 0;
4390                 }
4391
4392                 print format_log_line_html($line) . "<br/>\n";
4393         }
4394
4395         if ($opts{'-final_empty_line'}) {
4396                 # end with single empty line
4397                 print "<br/>\n" unless $empty;
4398         }
4399 }
4400
4401 # return link target (what link points to)
4402 sub git_get_link_target {
4403         my $hash = shift;
4404         my $link_target;
4405
4406         # read link
4407         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4408                 or return;
4409         {
4410                 local $/ = undef;
4411                 $link_target = <$fd>;
4412         }
4413         close $fd
4414                 or return;
4415
4416         return $link_target;
4417 }
4418
4419 # given link target, and the directory (basedir) the link is in,
4420 # return target of link relative to top directory (top tree);
4421 # return undef if it is not possible (including absolute links).
4422 sub normalize_link_target {
4423         my ($link_target, $basedir) = @_;
4424
4425         # absolute symlinks (beginning with '/') cannot be normalized
4426         return if (substr($link_target, 0, 1) eq '/');
4427
4428         # normalize link target to path from top (root) tree (dir)
4429         my $path;
4430         if ($basedir) {
4431                 $path = $basedir . '/' . $link_target;
4432         } else {
4433                 # we are in top (root) tree (dir)
4434                 $path = $link_target;
4435         }
4436
4437         # remove //, /./, and /../
4438         my @path_parts;
4439         foreach my $part (split('/', $path)) {
4440                 # discard '.' and ''
4441                 next if (!$part || $part eq '.');
4442                 # handle '..'
4443                 if ($part eq '..') {
4444                         if (@path_parts) {
4445                                 pop @path_parts;
4446                         } else {
4447                                 # link leads outside repository (outside top dir)
4448                                 return;
4449                         }
4450                 } else {
4451                         push @path_parts, $part;
4452                 }
4453         }
4454         $path = join('/', @path_parts);
4455
4456         return $path;
4457 }
4458
4459 # print tree entry (row of git_tree), but without encompassing <tr> element
4460 sub git_print_tree_entry {
4461         my ($t, $basedir, $hash_base, $have_blame) = @_;
4462
4463         my %base_key = ();
4464         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4465
4466         # The format of a table row is: mode list link.  Where mode is
4467         # the mode of the entry, list is the name of the entry, an href,
4468         # and link is the action links of the entry.
4469
4470         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4471         if (exists $t->{'size'}) {
4472                 print "<td class=\"size\">$t->{'size'}</td>\n";
4473         }
4474         if ($t->{'type'} eq "blob") {
4475                 print "<td class=\"list\">" .
4476                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4477                                                file_name=>"$basedir$t->{'name'}", %base_key),
4478                                 -class => "list"}, esc_path($t->{'name'}));
4479                 if (S_ISLNK(oct $t->{'mode'})) {
4480                         my $link_target = git_get_link_target($t->{'hash'});
4481                         if ($link_target) {
4482                                 my $norm_target = normalize_link_target($link_target, $basedir);
4483                                 if (defined $norm_target) {
4484                                         print " -> " .
4485                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4486                                                                      file_name=>$norm_target),
4487                                                        -title => $norm_target}, esc_path($link_target));
4488                                 } else {
4489                                         print " -> " . esc_path($link_target);
4490                                 }
4491                         }
4492                 }
4493                 print "</td>\n";
4494                 print "<td class=\"link\">";
4495                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4496                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4497                               "blob");
4498                 if ($have_blame) {
4499                         print " | " .
4500                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4501                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4502                                       "blame");
4503                 }
4504                 if (defined $hash_base) {
4505                         print " | " .
4506                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4507                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4508                                       "history");
4509                 }
4510                 print " | " .
4511                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4512                                                file_name=>"$basedir$t->{'name'}")},
4513                                 "raw");
4514                 print "</td>\n";
4515
4516         } elsif ($t->{'type'} eq "tree") {
4517                 print "<td class=\"list\">";
4518                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4519                                              file_name=>"$basedir$t->{'name'}",
4520                                              %base_key)},
4521                               esc_path($t->{'name'}));
4522                 print "</td>\n";
4523                 print "<td class=\"link\">";
4524                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4525                                              file_name=>"$basedir$t->{'name'}",
4526                                              %base_key)},
4527                               "tree");
4528                 if (defined $hash_base) {
4529                         print " | " .
4530                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4531                                                      file_name=>"$basedir$t->{'name'}")},
4532                                       "history");
4533                 }
4534                 print "</td>\n";
4535         } else {
4536                 # unknown object: we can only present history for it
4537                 # (this includes 'commit' object, i.e. submodule support)
4538                 print "<td class=\"list\">" .
4539                       esc_path($t->{'name'}) .
4540                       "</td>\n";
4541                 print "<td class=\"link\">";
4542                 if (defined $hash_base) {
4543                         print $cgi->a({-href => href(action=>"history",
4544                                                      hash_base=>$hash_base,
4545                                                      file_name=>"$basedir$t->{'name'}")},
4546                                       "history");
4547                 }
4548                 print "</td>\n";
4549         }
4550 }
4551
4552 ## ......................................................................
4553 ## functions printing large fragments of HTML
4554
4555 # get pre-image filenames for merge (combined) diff
4556 sub fill_from_file_info {
4557         my ($diff, @parents) = @_;
4558
4559         $diff->{'from_file'} = [ ];
4560         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4561         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4562                 if ($diff->{'status'}[$i] eq 'R' ||
4563                     $diff->{'status'}[$i] eq 'C') {
4564                         $diff->{'from_file'}[$i] =
4565                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4566                 }
4567         }
4568
4569         return $diff;
4570 }
4571
4572 # is current raw difftree line of file deletion
4573 sub is_deleted {
4574         my $diffinfo = shift;
4575
4576         return $diffinfo->{'to_id'} eq ('0' x 40);
4577 }
4578
4579 # does patch correspond to [previous] difftree raw line
4580 # $diffinfo  - hashref of parsed raw diff format
4581 # $patchinfo - hashref of parsed patch diff format
4582 #              (the same keys as in $diffinfo)
4583 sub is_patch_split {
4584         my ($diffinfo, $patchinfo) = @_;
4585
4586         return defined $diffinfo && defined $patchinfo
4587                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4588 }
4589
4590
4591 sub git_difftree_body {
4592         my ($difftree, $hash, @parents) = @_;
4593         my ($parent) = $parents[0];
4594         my $have_blame = gitweb_check_feature('blame');
4595         print "<div class=\"list_head\">\n";
4596         if ($#{$difftree} > 10) {
4597                 print(($#{$difftree} + 1) . " files changed:\n");
4598         }
4599         print "</div>\n";
4600
4601         print "<table class=\"" .
4602               (@parents > 1 ? "combined " : "") .
4603               "diff_tree\">\n";
4604
4605         # header only for combined diff in 'commitdiff' view
4606         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4607         if ($has_header) {
4608                 # table header
4609                 print "<thead><tr>\n" .
4610                        "<th></th><th></th>\n"; # filename, patchN link
4611                 for (my $i = 0; $i < @parents; $i++) {
4612                         my $par = $parents[$i];
4613                         print "<th>" .
4614                               $cgi->a({-href => href(action=>"commitdiff",
4615                                                      hash=>$hash, hash_parent=>$par),
4616                                        -title => 'commitdiff to parent number ' .
4617                                                   ($i+1) . ': ' . substr($par,0,7)},
4618                                       $i+1) .
4619                               "&nbsp;</th>\n";
4620                 }
4621                 print "</tr></thead>\n<tbody>\n";
4622         }
4623
4624         my $alternate = 1;
4625         my $patchno = 0;
4626         foreach my $line (@{$difftree}) {
4627                 my $diff = parsed_difftree_line($line);
4628
4629                 if ($alternate) {
4630                         print "<tr class=\"dark\">\n";
4631                 } else {
4632                         print "<tr class=\"light\">\n";
4633                 }
4634                 $alternate ^= 1;
4635
4636                 if (exists $diff->{'nparents'}) { # combined diff
4637
4638                         fill_from_file_info($diff, @parents)
4639                                 unless exists $diff->{'from_file'};
4640
4641                         if (!is_deleted($diff)) {
4642                                 # file exists in the result (child) commit
4643                                 print "<td>" .
4644                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4645                                                              file_name=>$diff->{'to_file'},
4646                                                              hash_base=>$hash),
4647                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4648                                       "</td>\n";
4649                         } else {
4650                                 print "<td>" .
4651                                       esc_path($diff->{'to_file'}) .
4652                                       "</td>\n";
4653                         }
4654
4655                         if ($action eq 'commitdiff') {
4656                                 # link to patch
4657                                 $patchno++;
4658                                 print "<td class=\"link\">" .
4659                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4660                                               "patch") .
4661                                       " | " .
4662                                       "</td>\n";
4663                         }
4664
4665                         my $has_history = 0;
4666                         my $not_deleted = 0;
4667                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4668                                 my $hash_parent = $parents[$i];
4669                                 my $from_hash = $diff->{'from_id'}[$i];
4670                                 my $from_path = $diff->{'from_file'}[$i];
4671                                 my $status = $diff->{'status'}[$i];
4672
4673                                 $has_history ||= ($status ne 'A');
4674                                 $not_deleted ||= ($status ne 'D');
4675
4676                                 if ($status eq 'A') {
4677                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4678                                 } elsif ($status eq 'D') {
4679                                         print "<td class=\"link\">" .
4680                                               $cgi->a({-href => href(action=>"blob",
4681                                                                      hash_base=>$hash,
4682                                                                      hash=>$from_hash,
4683                                                                      file_name=>$from_path)},
4684                                                       "blob" . ($i+1)) .
4685                                               " | </td>\n";
4686                                 } else {
4687                                         if ($diff->{'to_id'} eq $from_hash) {
4688                                                 print "<td class=\"link nochange\">";
4689                                         } else {
4690                                                 print "<td class=\"link\">";
4691                                         }
4692                                         print $cgi->a({-href => href(action=>"blobdiff",
4693                                                                      hash=>$diff->{'to_id'},
4694                                                                      hash_parent=>$from_hash,
4695                                                                      hash_base=>$hash,
4696                                                                      hash_parent_base=>$hash_parent,
4697                                                                      file_name=>$diff->{'to_file'},
4698                                                                      file_parent=>$from_path)},
4699                                                       "diff" . ($i+1)) .
4700                                               " | </td>\n";
4701                                 }
4702                         }
4703
4704                         print "<td class=\"link\">";
4705                         if ($not_deleted) {
4706                                 print $cgi->a({-href => href(action=>"blob",
4707                                                              hash=>$diff->{'to_id'},
4708                                                              file_name=>$diff->{'to_file'},
4709                                                              hash_base=>$hash)},
4710                                               "blob");
4711                                 print " | " if ($has_history);
4712                         }
4713                         if ($has_history) {
4714                                 print $cgi->a({-href => href(action=>"history",
4715                                                              file_name=>$diff->{'to_file'},
4716                                                              hash_base=>$hash)},
4717                                               "history");
4718                         }
4719                         print "</td>\n";
4720
4721                         print "</tr>\n";
4722                         next; # instead of 'else' clause, to avoid extra indent
4723                 }
4724                 # else ordinary diff
4725
4726                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4727                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4728                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4729                         $to_mode_oct = oct $diff->{'to_mode'};
4730                         if (S_ISREG($to_mode_oct)) { # only for regular file
4731                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4732                         }
4733                         $to_file_type = file_type($diff->{'to_mode'});
4734                 }
4735                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4736                         $from_mode_oct = oct $diff->{'from_mode'};
4737                         if (S_ISREG($from_mode_oct)) { # only for regular file
4738                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4739                         }
4740                         $from_file_type = file_type($diff->{'from_mode'});
4741                 }
4742
4743                 if ($diff->{'status'} eq "A") { # created
4744                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4745                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4746                         $mode_chng   .= "]</span>";
4747                         print "<td>";
4748                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4749                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4750                                       -class => "list"}, esc_path($diff->{'file'}));
4751                         print "</td>\n";
4752                         print "<td>$mode_chng</td>\n";
4753                         print "<td class=\"link\">";
4754                         if ($action eq 'commitdiff') {
4755                                 # link to patch
4756                                 $patchno++;
4757                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4758                                               "patch") .
4759                                       " | ";
4760                         }
4761                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4762                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4763                                       "blob");
4764                         print "</td>\n";
4765
4766                 } elsif ($diff->{'status'} eq "D") { # deleted
4767                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4768                         print "<td>";
4769                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4770                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4771                                        -class => "list"}, esc_path($diff->{'file'}));
4772                         print "</td>\n";
4773                         print "<td>$mode_chng</td>\n";
4774                         print "<td class=\"link\">";
4775                         if ($action eq 'commitdiff') {
4776                                 # link to patch
4777                                 $patchno++;
4778                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4779                                               "patch") .
4780                                       " | ";
4781                         }
4782                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4783                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4784                                       "blob") . " | ";
4785                         if ($have_blame) {
4786                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4787                                                              file_name=>$diff->{'file'})},
4788                                               "blame") . " | ";
4789                         }
4790                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4791                                                      file_name=>$diff->{'file'})},
4792                                       "history");
4793                         print "</td>\n";
4794
4795                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4796                         my $mode_chnge = "";
4797                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4798                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4799                                 if ($from_file_type ne $to_file_type) {
4800                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4801                                 }
4802                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4803                                         if ($from_mode_str && $to_mode_str) {
4804                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4805                                         } elsif ($to_mode_str) {
4806                                                 $mode_chnge .= " mode: $to_mode_str";
4807                                         }
4808                                 }
4809                                 $mode_chnge .= "]</span>\n";
4810                         }
4811                         print "<td>";
4812                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4813                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4814                                       -class => "list"}, esc_path($diff->{'file'}));
4815                         print "</td>\n";
4816                         print "<td>$mode_chnge</td>\n";
4817                         print "<td class=\"link\">";
4818                         if ($action eq 'commitdiff') {
4819                                 # link to patch
4820                                 $patchno++;
4821                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4822                                               "patch") .
4823                                       " | ";
4824                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4825                                 # "commit" view and modified file (not onlu mode changed)
4826                                 print $cgi->a({-href => href(action=>"blobdiff",
4827                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4828                                                              hash_base=>$hash, hash_parent_base=>$parent,
4829                                                              file_name=>$diff->{'file'})},
4830                                               "diff") .
4831                                       " | ";
4832                         }
4833                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4834                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4835                                        "blob") . " | ";
4836                         if ($have_blame) {
4837                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4838                                                              file_name=>$diff->{'file'})},
4839                                               "blame") . " | ";
4840                         }
4841                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4842                                                      file_name=>$diff->{'file'})},
4843                                       "history");
4844                         print "</td>\n";
4845
4846                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4847                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4848                         my $nstatus = $status_name{$diff->{'status'}};
4849                         my $mode_chng = "";
4850                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4851                                 # mode also for directories, so we cannot use $to_mode_str
4852                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4853                         }
4854                         print "<td>" .
4855                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4856                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4857                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4858                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4859                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4860                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4861                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4862                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4863                               "<td class=\"link\">";
4864                         if ($action eq 'commitdiff') {
4865                                 # link to patch
4866                                 $patchno++;
4867                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4868                                               "patch") .
4869                                       " | ";
4870                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4871                                 # "commit" view and modified file (not only pure rename or copy)
4872                                 print $cgi->a({-href => href(action=>"blobdiff",
4873                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4874                                                              hash_base=>$hash, hash_parent_base=>$parent,
4875                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4876                                               "diff") .
4877                                       " | ";
4878                         }
4879                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4880                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4881                                       "blob") . " | ";
4882                         if ($have_blame) {
4883                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4884                                                              file_name=>$diff->{'to_file'})},
4885                                               "blame") . " | ";
4886                         }
4887                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4888                                                     file_name=>$diff->{'to_file'})},
4889                                       "history");
4890                         print "</td>\n";
4891
4892                 } # we should not encounter Unmerged (U) or Unknown (X) status
4893                 print "</tr>\n";
4894         }
4895         print "</tbody>" if $has_header;
4896         print "</table>\n";
4897 }
4898
4899 sub print_sidebyside_diff_chunk {
4900         my @chunk = @_;
4901         my (@ctx, @rem, @add);
4902
4903         return unless @chunk;
4904
4905         # incomplete last line might be among removed or added lines,
4906         # or both, or among context lines: find which
4907         for (my $i = 1; $i < @chunk; $i++) {
4908                 if ($chunk[$i][0] eq 'incomplete') {
4909                         $chunk[$i][0] = $chunk[$i-1][0];
4910                 }
4911         }
4912
4913         # guardian
4914         push @chunk, ["", ""];
4915
4916         foreach my $line_info (@chunk) {
4917                 my ($class, $line) = @$line_info;
4918
4919                 # print chunk headers
4920                 if ($class && $class eq 'chunk_header') {
4921                         print $line;
4922                         next;
4923                 }
4924
4925                 ## print from accumulator when type of class of lines change
4926                 # empty contents block on start rem/add block, or end of chunk
4927                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4928                         print join '',
4929                                 '<div class="chunk_block ctx">',
4930                                         '<div class="old">',
4931                                         @ctx,
4932                                         '</div>',
4933                                         '<div class="new">',
4934                                         @ctx,
4935                                         '</div>',
4936                                 '</div>';
4937                         @ctx = ();
4938                 }
4939                 # empty add/rem block on start context block, or end of chunk
4940                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4941                         if (!@add) {
4942                                 # pure removal
4943                                 print join '',
4944                                         '<div class="chunk_block rem">',
4945                                                 '<div class="old">',
4946                                                 @rem,
4947                                                 '</div>',
4948                                         '</div>';
4949                         } elsif (!@rem) {
4950                                 # pure addition
4951                                 print join '',
4952                                         '<div class="chunk_block add">',
4953                                                 '<div class="new">',
4954                                                 @add,
4955                                                 '</div>',
4956                                         '</div>';
4957                         } else {
4958                                 # assume that it is change
4959                                 print join '',
4960                                         '<div class="chunk_block chg">',
4961                                                 '<div class="old">',
4962                                                 @rem,
4963                                                 '</div>',
4964                                                 '<div class="new">',
4965                                                 @add,
4966                                                 '</div>',
4967                                         '</div>';
4968                         }
4969                         @rem = @add = ();
4970                 }
4971
4972                 ## adding lines to accumulator
4973                 # guardian value
4974                 last unless $line;
4975                 # rem, add or change
4976                 if ($class eq 'rem') {
4977                         push @rem, $line;
4978                 } elsif ($class eq 'add') {
4979                         push @add, $line;
4980                 }
4981                 # context line
4982                 if ($class eq 'ctx') {
4983                         push @ctx, $line;
4984                 }
4985         }
4986 }
4987
4988 sub git_patchset_body {
4989         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4990         my ($hash_parent) = $hash_parents[0];
4991
4992         my $is_combined = (@hash_parents > 1);
4993         my $patch_idx = 0;
4994         my $patch_number = 0;
4995         my $patch_line;
4996         my $diffinfo;
4997         my $to_name;
4998         my (%from, %to);
4999         my @chunk; # for side-by-side diff
5000
5001         print "<div class=\"patchset\">\n";
5002
5003         # skip to first patch
5004         while ($patch_line = <$fd>) {
5005                 chomp $patch_line;
5006
5007                 last if ($patch_line =~ m/^diff /);
5008         }
5009
5010  PATCH:
5011         while ($patch_line) {
5012
5013                 # parse "git diff" header line
5014                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5015                         # $1 is from_name, which we do not use
5016                         $to_name = unquote($2);
5017                         $to_name =~ s!^b/!!;
5018                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5019                         # $1 is 'cc' or 'combined', which we do not use
5020                         $to_name = unquote($2);
5021                 } else {
5022                         $to_name = undef;
5023                 }
5024
5025                 # check if current patch belong to current raw line
5026                 # and parse raw git-diff line if needed
5027                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5028                         # this is continuation of a split patch
5029                         print "<div class=\"patch cont\">\n";
5030                 } else {
5031                         # advance raw git-diff output if needed
5032                         $patch_idx++ if defined $diffinfo;
5033
5034                         # read and prepare patch information
5035                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5036
5037                         # compact combined diff output can have some patches skipped
5038                         # find which patch (using pathname of result) we are at now;
5039                         if ($is_combined) {
5040                                 while ($to_name ne $diffinfo->{'to_file'}) {
5041                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5042                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5043                                               "</div>\n";  # class="patch"
5044
5045                                         $patch_idx++;
5046                                         $patch_number++;
5047
5048                                         last if $patch_idx > $#$difftree;
5049                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5050                                 }
5051                         }
5052
5053                         # modifies %from, %to hashes
5054                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5055
5056                         # this is first patch for raw difftree line with $patch_idx index
5057                         # we index @$difftree array from 0, but number patches from 1
5058                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5059                 }
5060
5061                 # git diff header
5062                 #assert($patch_line =~ m/^diff /) if DEBUG;
5063                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5064                 $patch_number++;
5065                 # print "git diff" header
5066                 print format_git_diff_header_line($patch_line, $diffinfo,
5067                                                   \%from, \%to);
5068
5069                 # print extended diff header
5070                 print "<div class=\"diff extended_header\">\n";
5071         EXTENDED_HEADER:
5072                 while ($patch_line = <$fd>) {
5073                         chomp $patch_line;
5074
5075                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5076
5077                         print format_extended_diff_header_line($patch_line, $diffinfo,
5078                                                                \%from, \%to);
5079                 }
5080                 print "</div>\n"; # class="diff extended_header"
5081
5082                 # from-file/to-file diff header
5083                 if (! $patch_line) {
5084                         print "</div>\n"; # class="patch"
5085                         last PATCH;
5086                 }
5087                 next PATCH if ($patch_line =~ m/^diff /);
5088                 #assert($patch_line =~ m/^---/) if DEBUG;
5089
5090                 my $last_patch_line = $patch_line;
5091                 $patch_line = <$fd>;
5092                 chomp $patch_line;
5093                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5094
5095                 print format_diff_from_to_header($last_patch_line, $patch_line,
5096                                                  $diffinfo, \%from, \%to,
5097                                                  @hash_parents);
5098
5099                 # the patch itself
5100         LINE:
5101                 while ($patch_line = <$fd>) {
5102                         chomp $patch_line;
5103
5104                         next PATCH if ($patch_line =~ m/^diff /);
5105
5106                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5107                         my $diff_classes = "diff";
5108                         $diff_classes .= " $class" if ($class);
5109                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5110
5111                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5112                                 if ($class eq 'chunk_header') {
5113                                         print_sidebyside_diff_chunk(@chunk);
5114                                         @chunk = ( [ $class, $line ] );
5115                                 } else {
5116                                         push @chunk, [ $class, $line ];
5117                                 }
5118                         } else {
5119                                 # default 'inline' style and unknown styles
5120                                 print $line;
5121                         }
5122                 }
5123
5124         } continue {
5125                 if (@chunk) {
5126                         print_sidebyside_diff_chunk(@chunk);
5127                         @chunk = ();
5128                 }
5129                 print "</div>\n"; # class="patch"
5130         }
5131
5132         # for compact combined (--cc) format, with chunk and patch simplification
5133         # the patchset might be empty, but there might be unprocessed raw lines
5134         for (++$patch_idx if $patch_number > 0;
5135              $patch_idx < @$difftree;
5136              ++$patch_idx) {
5137                 # read and prepare patch information
5138                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5139
5140                 # generate anchor for "patch" links in difftree / whatchanged part
5141                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5142                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5143                       "</div>\n";  # class="patch"
5144
5145                 $patch_number++;
5146         }
5147
5148         if ($patch_number == 0) {
5149                 if (@hash_parents > 1) {
5150                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5151                 } else {
5152                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5153                 }
5154         }
5155
5156         print "</div>\n"; # class="patchset"
5157 }
5158
5159 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5160
5161 # fills project list info (age, description, owner, category, forks)
5162 # for each project in the list, removing invalid projects from
5163 # returned list
5164 # NOTE: modifies $projlist, but does not remove entries from it
5165 sub fill_project_list_info {
5166         my $projlist = shift;
5167         my @projects;
5168
5169         my $show_ctags = gitweb_check_feature('ctags');
5170  PROJECT:
5171         foreach my $pr (@$projlist) {
5172                 my (@activity) = git_get_last_activity($pr->{'path'});
5173                 unless (@activity) {
5174                         next PROJECT;
5175                 }
5176                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5177                 if (!defined $pr->{'descr'}) {
5178                         my $descr = git_get_project_description($pr->{'path'}) || "";
5179                         $descr = to_utf8($descr);
5180                         $pr->{'descr_long'} = $descr;
5181                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5182                 }
5183                 if (!defined $pr->{'owner'}) {
5184                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5185                 }
5186                 if ($show_ctags) {
5187                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5188                 }
5189                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5190                         my $cat = git_get_project_category($pr->{'path'}) ||
5191                                                            $project_list_default_category;
5192                         $pr->{'category'} = to_utf8($cat);
5193                 }
5194
5195                 push @projects, $pr;
5196         }
5197
5198         return @projects;
5199 }
5200
5201 sub sort_projects_list {
5202         my ($projlist, $order) = @_;
5203         my @projects;
5204
5205         my %order_info = (
5206                 project => { key => 'path', type => 'str' },
5207                 descr => { key => 'descr_long', type => 'str' },
5208                 owner => { key => 'owner', type => 'str' },
5209                 age => { key => 'age', type => 'num' }
5210         );
5211         my $oi = $order_info{$order};
5212         return @$projlist unless defined $oi;
5213         if ($oi->{'type'} eq 'str') {
5214                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5215         } else {
5216                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5217         }
5218
5219         return @projects;
5220 }
5221
5222 # returns a hash of categories, containing the list of project
5223 # belonging to each category
5224 sub build_projlist_by_category {
5225         my ($projlist, $from, $to) = @_;
5226         my %categories;
5227
5228         $from = 0 unless defined $from;
5229         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5230
5231         for (my $i = $from; $i <= $to; $i++) {
5232                 my $pr = $projlist->[$i];
5233                 push @{$categories{ $pr->{'category'} }}, $pr;
5234         }
5235
5236         return wantarray ? %categories : \%categories;
5237 }
5238
5239 # print 'sort by' <th> element, generating 'sort by $name' replay link
5240 # if that order is not selected
5241 sub print_sort_th {
5242         print format_sort_th(@_);
5243 }
5244
5245 sub format_sort_th {
5246         my ($name, $order, $header) = @_;
5247         my $sort_th = "";
5248         $header ||= ucfirst($name);
5249
5250         if ($order eq $name) {
5251                 $sort_th .= "<th>$header</th>\n";
5252         } else {
5253                 $sort_th .= "<th>" .
5254                             $cgi->a({-href => href(-replay=>1, order=>$name),
5255                                      -class => "header"}, $header) .
5256                             "</th>\n";
5257         }
5258
5259         return $sort_th;
5260 }
5261
5262 sub git_project_list_rows {
5263         my ($projlist, $from, $to, $check_forks) = @_;
5264
5265         $from = 0 unless defined $from;
5266         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5267
5268         my $alternate = 1;
5269         for (my $i = $from; $i <= $to; $i++) {
5270                 my $pr = $projlist->[$i];
5271
5272                 if ($alternate) {
5273                         print "<tr class=\"dark\">\n";
5274                 } else {
5275                         print "<tr class=\"light\">\n";
5276                 }
5277                 $alternate ^= 1;
5278
5279                 if ($check_forks) {
5280                         print "<td>";
5281                         if ($pr->{'forks'}) {
5282                                 my $nforks = scalar @{$pr->{'forks'}};
5283                                 if ($nforks > 0) {
5284                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5285                                                        -title => "$nforks forks"}, "+");
5286                                 } else {
5287                                         print $cgi->span({-title => "$nforks forks"}, "+");
5288                                 }
5289                         }
5290                         print "</td>\n";
5291                 }
5292                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5293                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5294                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5295                                         -class => "list", -title => $pr->{'descr_long'}},
5296                                         esc_html($pr->{'descr'})) . "</td>\n" .
5297                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5298                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5299                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5300                       "<td class=\"link\">" .
5301                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5302                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5303                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5304                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5305                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5306                       "</td>\n" .
5307                       "</tr>\n";
5308         }
5309 }
5310
5311 sub git_project_list_body {
5312         # actually uses global variable $project
5313         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5314         my @projects = @$projlist;
5315
5316         my $check_forks = gitweb_check_feature('forks');
5317         my $show_ctags  = gitweb_check_feature('ctags');
5318         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5319         $check_forks = undef
5320                 if ($tagfilter || $searchtext);
5321
5322         # filtering out forks before filling info allows to do less work
5323         @projects = filter_forks_from_projects_list(\@projects)
5324                 if ($check_forks);
5325         @projects = fill_project_list_info(\@projects);
5326         # searching projects require filling to be run before it
5327         @projects = search_projects_list(\@projects,
5328                                          'searchtext' => $searchtext,
5329                                          'tagfilter'  => $tagfilter)
5330                 if ($tagfilter || $searchtext);
5331
5332         $order ||= $default_projects_order;
5333         $from = 0 unless defined $from;
5334         $to = $#projects if (!defined $to || $#projects < $to);
5335
5336         # short circuit
5337         if ($from > $to) {
5338                 print "<center>\n".
5339                       "<b>No such projects found</b><br />\n".
5340                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5341                       "</center>\n<br />\n";
5342                 return;
5343         }
5344
5345         @projects = sort_projects_list(\@projects, $order);
5346
5347         if ($show_ctags) {
5348                 my $ctags = git_gather_all_ctags(\@projects);
5349                 my $cloud = git_populate_project_tagcloud($ctags);
5350                 print git_show_project_tagcloud($cloud, 64);
5351         }
5352
5353         print "<table class=\"project_list\">\n";
5354         unless ($no_header) {
5355                 print "<tr>\n";
5356                 if ($check_forks) {
5357                         print "<th></th>\n";
5358                 }
5359                 print_sort_th('project', $order, 'Project');
5360                 print_sort_th('descr', $order, 'Description');
5361                 print_sort_th('owner', $order, 'Owner');
5362                 print_sort_th('age', $order, 'Last Change');
5363                 print "<th></th>\n" . # for links
5364                       "</tr>\n";
5365         }
5366
5367         if ($projects_list_group_categories) {
5368                 # only display categories with projects in the $from-$to window
5369                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5370                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5371                 foreach my $cat (sort keys %categories) {
5372                         unless ($cat eq "") {
5373                                 print "<tr>\n";
5374                                 if ($check_forks) {
5375                                         print "<td></td>\n";
5376                                 }
5377                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5378                                 print "</tr>\n";
5379                         }
5380
5381                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5382                 }
5383         } else {
5384                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5385         }
5386
5387         if (defined $extra) {
5388                 print "<tr>\n";
5389                 if ($check_forks) {
5390                         print "<td></td>\n";
5391                 }
5392                 print "<td colspan=\"5\">$extra</td>\n" .
5393                       "</tr>\n";
5394         }
5395         print "</table>\n";
5396 }
5397
5398 sub git_log_body {
5399         # uses global variable $project
5400         my ($commitlist, $from, $to, $refs, $extra) = @_;
5401
5402         $from = 0 unless defined $from;
5403         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5404
5405         for (my $i = 0; $i <= $to; $i++) {
5406                 my %co = %{$commitlist->[$i]};
5407                 next if !%co;
5408                 my $commit = $co{'id'};
5409                 my $ref = format_ref_marker($refs, $commit);
5410                 git_print_header_div('commit',
5411                                "<span class=\"age\">$co{'age_string'}</span>" .
5412                                esc_html($co{'title'}) . $ref,
5413                                $commit);
5414                 print "<div class=\"title_text\">\n" .
5415                       "<div class=\"log_link\">\n" .
5416                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5417                       " | " .
5418                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5419                       " | " .
5420                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5421                       "<br/>\n" .
5422                       "</div>\n";
5423                       git_print_authorship(\%co, -tag => 'span');
5424                       print "<br/>\n</div>\n";
5425
5426                 print "<div class=\"log_body\">\n";
5427                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5428                 print "</div>\n";
5429         }
5430         if ($extra) {
5431                 print "<div class=\"page_nav\">\n";
5432                 print "$extra\n";
5433                 print "</div>\n";
5434         }
5435 }
5436
5437 sub git_shortlog_body {
5438         # uses global variable $project
5439         my ($commitlist, $from, $to, $refs, $extra) = @_;
5440
5441         $from = 0 unless defined $from;
5442         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5443
5444         print "<table class=\"shortlog\">\n";
5445         my $alternate = 1;
5446         for (my $i = $from; $i <= $to; $i++) {
5447                 my %co = %{$commitlist->[$i]};
5448                 my $commit = $co{'id'};
5449                 my $ref = format_ref_marker($refs, $commit);
5450                 if ($alternate) {
5451                         print "<tr class=\"dark\">\n";
5452                 } else {
5453                         print "<tr class=\"light\">\n";
5454                 }
5455                 $alternate ^= 1;
5456                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5457                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5458                       format_author_html('td', \%co, 10) . "<td>";
5459                 print format_subject_html($co{'title'}, $co{'title_short'},
5460                                           href(action=>"commit", hash=>$commit), $ref);
5461                 print "</td>\n" .
5462                       "<td class=\"link\">" .
5463                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5464                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5465                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5466                 my $snapshot_links = format_snapshot_links($commit);
5467                 if (defined $snapshot_links) {
5468                         print " | " . $snapshot_links;
5469                 }
5470                 print "</td>\n" .
5471                       "</tr>\n";
5472         }
5473         if (defined $extra) {
5474                 print "<tr>\n" .
5475                       "<td colspan=\"4\">$extra</td>\n" .
5476                       "</tr>\n";
5477         }
5478         print "</table>\n";
5479 }
5480
5481 sub git_history_body {
5482         # Warning: assumes constant type (blob or tree) during history
5483         my ($commitlist, $from, $to, $refs, $extra,
5484             $file_name, $file_hash, $ftype) = @_;
5485
5486         $from = 0 unless defined $from;
5487         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5488
5489         print "<table class=\"history\">\n";
5490         my $alternate = 1;
5491         for (my $i = $from; $i <= $to; $i++) {
5492                 my %co = %{$commitlist->[$i]};
5493                 if (!%co) {
5494                         next;
5495                 }
5496                 my $commit = $co{'id'};
5497
5498                 my $ref = format_ref_marker($refs, $commit);
5499
5500                 if ($alternate) {
5501                         print "<tr class=\"dark\">\n";
5502                 } else {
5503                         print "<tr class=\"light\">\n";
5504                 }
5505                 $alternate ^= 1;
5506                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5507         # shortlog:   format_author_html('td', \%co, 10)
5508                       format_author_html('td', \%co, 15, 3) . "<td>";
5509                 # originally git_history used chop_str($co{'title'}, 50)
5510                 print format_subject_html($co{'title'}, $co{'title_short'},
5511                                           href(action=>"commit", hash=>$commit), $ref);
5512                 print "</td>\n" .
5513                       "<td class=\"link\">" .
5514                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5515                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5516
5517                 if ($ftype eq 'blob') {
5518                         my $blob_current = $file_hash;
5519                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5520                         if (defined $blob_current && defined $blob_parent &&
5521                                         $blob_current ne $blob_parent) {
5522                                 print " | " .
5523                                         $cgi->a({-href => href(action=>"blobdiff",
5524                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5525                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5526                                                                file_name=>$file_name)},
5527                                                 "diff to current");
5528                         }
5529                 }
5530                 print "</td>\n" .
5531                       "</tr>\n";
5532         }
5533         if (defined $extra) {
5534                 print "<tr>\n" .
5535                       "<td colspan=\"4\">$extra</td>\n" .
5536                       "</tr>\n";
5537         }
5538         print "</table>\n";
5539 }
5540
5541 sub git_tags_body {
5542         # uses global variable $project
5543         my ($taglist, $from, $to, $extra) = @_;
5544         $from = 0 unless defined $from;
5545         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5546
5547         print "<table class=\"tags\">\n";
5548         my $alternate = 1;
5549         for (my $i = $from; $i <= $to; $i++) {
5550                 my $entry = $taglist->[$i];
5551                 my %tag = %$entry;
5552                 my $comment = $tag{'subject'};
5553                 my $comment_short;
5554                 if (defined $comment) {
5555                         $comment_short = chop_str($comment, 30, 5);
5556                 }
5557                 if ($alternate) {
5558                         print "<tr class=\"dark\">\n";
5559                 } else {
5560                         print "<tr class=\"light\">\n";
5561                 }
5562                 $alternate ^= 1;
5563                 if (defined $tag{'age'}) {
5564                         print "<td><i>$tag{'age'}</i></td>\n";
5565                 } else {
5566                         print "<td></td>\n";
5567                 }
5568                 print "<td>" .
5569                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5570                                -class => "list name"}, esc_html($tag{'name'})) .
5571                       "</td>\n" .
5572                       "<td>";
5573                 if (defined $comment) {
5574                         print format_subject_html($comment, $comment_short,
5575                                                   href(action=>"tag", hash=>$tag{'id'}));
5576                 }
5577                 print "</td>\n" .
5578                       "<td class=\"selflink\">";
5579                 if ($tag{'type'} eq "tag") {
5580                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5581                 } else {
5582                         print "&nbsp;";
5583                 }
5584                 print "</td>\n" .
5585                       "<td class=\"link\">" . " | " .
5586                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5587                 if ($tag{'reftype'} eq "commit") {
5588                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5589                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5590                 } elsif ($tag{'reftype'} eq "blob") {
5591                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5592                 }
5593                 print "</td>\n" .
5594                       "</tr>";
5595         }
5596         if (defined $extra) {
5597                 print "<tr>\n" .
5598                       "<td colspan=\"5\">$extra</td>\n" .
5599                       "</tr>\n";
5600         }
5601         print "</table>\n";
5602 }
5603
5604 sub git_heads_body {
5605         # uses global variable $project
5606         my ($headlist, $head, $from, $to, $extra) = @_;
5607         $from = 0 unless defined $from;
5608         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5609
5610         print "<table class=\"heads\">\n";
5611         my $alternate = 1;
5612         for (my $i = $from; $i <= $to; $i++) {
5613                 my $entry = $headlist->[$i];
5614                 my %ref = %$entry;
5615                 my $curr = $ref{'id'} eq $head;
5616                 if ($alternate) {
5617                         print "<tr class=\"dark\">\n";
5618                 } else {
5619                         print "<tr class=\"light\">\n";
5620                 }
5621                 $alternate ^= 1;
5622                 print "<td><i>$ref{'age'}</i></td>\n" .
5623                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5624                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5625                                -class => "list name"},esc_html($ref{'name'})) .
5626                       "</td>\n" .
5627                       "<td class=\"link\">" .
5628                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5629                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5630                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5631                       "</td>\n" .
5632                       "</tr>";
5633         }
5634         if (defined $extra) {
5635                 print "<tr>\n" .
5636                       "<td colspan=\"3\">$extra</td>\n" .
5637                       "</tr>\n";
5638         }
5639         print "</table>\n";
5640 }
5641
5642 # Display a single remote block
5643 sub git_remote_block {
5644         my ($remote, $rdata, $limit, $head) = @_;
5645
5646         my $heads = $rdata->{'heads'};
5647         my $fetch = $rdata->{'fetch'};
5648         my $push = $rdata->{'push'};
5649
5650         my $urls_table = "<table class=\"projects_list\">\n" ;
5651
5652         if (defined $fetch) {
5653                 if ($fetch eq $push) {
5654                         $urls_table .= format_repo_url("URL", $fetch);
5655                 } else {
5656                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5657                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5658                 }
5659         } elsif (defined $push) {
5660                 $urls_table .= format_repo_url("Push URL", $push);
5661         } else {
5662                 $urls_table .= format_repo_url("", "No remote URL");
5663         }
5664
5665         $urls_table .= "</table>\n";
5666
5667         my $dots;
5668         if (defined $limit && $limit < @$heads) {
5669                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5670         }
5671
5672         print $urls_table;
5673         git_heads_body($heads, $head, 0, $limit, $dots);
5674 }
5675
5676 # Display a list of remote names with the respective fetch and push URLs
5677 sub git_remotes_list {
5678         my ($remotedata, $limit) = @_;
5679         print "<table class=\"heads\">\n";
5680         my $alternate = 1;
5681         my @remotes = sort keys %$remotedata;
5682
5683         my $limited = $limit && $limit < @remotes;
5684
5685         $#remotes = $limit - 1 if $limited;
5686
5687         while (my $remote = shift @remotes) {
5688                 my $rdata = $remotedata->{$remote};
5689                 my $fetch = $rdata->{'fetch'};
5690                 my $push = $rdata->{'push'};
5691                 if ($alternate) {
5692                         print "<tr class=\"dark\">\n";
5693                 } else {
5694                         print "<tr class=\"light\">\n";
5695                 }
5696                 $alternate ^= 1;
5697                 print "<td>" .
5698                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5699                                -class=> "list name"},esc_html($remote)) .
5700                       "</td>";
5701                 print "<td class=\"link\">" .
5702                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5703                       " | " .
5704                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5705                       "</td>";
5706
5707                 print "</tr>\n";
5708         }
5709
5710         if ($limited) {
5711                 print "<tr>\n" .
5712                       "<td colspan=\"3\">" .
5713                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5714                       "</td>\n" . "</tr>\n";
5715         }
5716
5717         print "</table>";
5718 }
5719
5720 # Display remote heads grouped by remote, unless there are too many
5721 # remotes, in which case we only display the remote names
5722 sub git_remotes_body {
5723         my ($remotedata, $limit, $head) = @_;
5724         if ($limit and $limit < keys %$remotedata) {
5725                 git_remotes_list($remotedata, $limit);
5726         } else {
5727                 fill_remote_heads($remotedata);
5728                 while (my ($remote, $rdata) = each %$remotedata) {
5729                         git_print_section({-class=>"remote", -id=>$remote},
5730                                 ["remotes", $remote, $remote], sub {
5731                                         git_remote_block($remote, $rdata, $limit, $head);
5732                                 });
5733                 }
5734         }
5735 }
5736
5737 sub git_search_message {
5738         my %co = @_;
5739
5740         my $greptype;
5741         if ($searchtype eq 'commit') {
5742                 $greptype = "--grep=";
5743         } elsif ($searchtype eq 'author') {
5744                 $greptype = "--author=";
5745         } elsif ($searchtype eq 'committer') {
5746                 $greptype = "--committer=";
5747         }
5748         $greptype .= $searchtext;
5749         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5750                                        $greptype, '--regexp-ignore-case',
5751                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5752
5753         my $paging_nav = '';
5754         if ($page > 0) {
5755                 $paging_nav .=
5756                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5757                                 "first") .
5758                         " &sdot; " .
5759                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5760                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5761         } else {
5762                 $paging_nav .= "first &sdot; prev";
5763         }
5764         my $next_link = '';
5765         if ($#commitlist >= 100) {
5766                 $next_link =
5767                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5768                                  -accesskey => "n", -title => "Alt-n"}, "next");
5769                 $paging_nav .= " &sdot; $next_link";
5770         } else {
5771                 $paging_nav .= " &sdot; next";
5772         }
5773
5774         git_header_html();
5775
5776         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5777         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5778         if ($page == 0 && !@commitlist) {
5779                 print "<p>No match.</p>\n";
5780         } else {
5781                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5782         }
5783
5784         git_footer_html();
5785 }
5786
5787 sub git_search_changes {
5788         my %co = @_;
5789
5790         local $/ = "\n";
5791         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5792                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5793                 ($search_use_regexp ? '--pickaxe-regex' : ())
5794                         or die_error(500, "Open git-log failed");
5795
5796         git_header_html();
5797
5798         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5799         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5800
5801         print "<table class=\"pickaxe search\">\n";
5802         my $alternate = 1;
5803         undef %co;
5804         my @files;
5805         while (my $line = <$fd>) {
5806                 chomp $line;
5807                 next unless $line;
5808
5809                 my %set = parse_difftree_raw_line($line);
5810                 if (defined $set{'commit'}) {
5811                         # finish previous commit
5812                         if (%co) {
5813                                 print "</td>\n" .
5814                                       "<td class=\"link\">" .
5815                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5816                                               "commit") .
5817                                       " | " .
5818                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5819                                                              hash_base=>$co{'id'})},
5820                                               "tree") .
5821                                       "</td>\n" .
5822                                       "</tr>\n";
5823                         }
5824
5825                         if ($alternate) {
5826                                 print "<tr class=\"dark\">\n";
5827                         } else {
5828                                 print "<tr class=\"light\">\n";
5829                         }
5830                         $alternate ^= 1;
5831                         %co = parse_commit($set{'commit'});
5832                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5833                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5834                               "<td><i>$author</i></td>\n" .
5835                               "<td>" .
5836                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5837                                       -class => "list subject"},
5838                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5839                 } elsif (defined $set{'to_id'}) {
5840                         next if ($set{'to_id'} =~ m/^0{40}$/);
5841
5842                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5843                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5844                                       -class => "list"},
5845                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5846                               "<br/>\n";
5847                 }
5848         }
5849         close $fd;
5850
5851         # finish last commit (warning: repetition!)
5852         if (%co) {
5853                 print "</td>\n" .
5854                       "<td class=\"link\">" .
5855                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5856                               "commit") .
5857                       " | " .
5858                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5859                                              hash_base=>$co{'id'})},
5860                               "tree") .
5861                       "</td>\n" .
5862                       "</tr>\n";
5863         }
5864
5865         print "</table>\n";
5866
5867         git_footer_html();
5868 }
5869
5870 sub git_search_files {
5871         my %co = @_;
5872
5873         local $/ = "\n";
5874         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5875                 $search_use_regexp ? ('-E', '-i') : '-F',
5876                 $searchtext, $co{'tree'}
5877                         or die_error(500, "Open git-grep failed");
5878
5879         git_header_html();
5880
5881         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5882         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5883
5884         print "<table class=\"grep_search\">\n";
5885         my $alternate = 1;
5886         my $matches = 0;
5887         my $lastfile = '';
5888         while (my $line = <$fd>) {
5889                 chomp $line;
5890                 my ($file, $file_href, $lno, $ltext, $binary);
5891                 last if ($matches++ > 1000);
5892                 if ($line =~ /^Binary file (.+) matches$/) {
5893                         $file = $1;
5894                         $binary = 1;
5895                 } else {
5896                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5897                         $file =~ s/^$co{'tree'}://;
5898                 }
5899                 if ($file ne $lastfile) {
5900                         $lastfile and print "</td></tr>\n";
5901                         if ($alternate++) {
5902                                 print "<tr class=\"dark\">\n";
5903                         } else {
5904                                 print "<tr class=\"light\">\n";
5905                         }
5906                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5907                                           file_name=>$file);
5908                         print "<td class=\"list\">".
5909                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5910                         print "</td><td>\n";
5911                         $lastfile = $file;
5912                 }
5913                 if ($binary) {
5914                         print "<div class=\"binary\">Binary file</div>\n";
5915                 } else {
5916                         $ltext = untabify($ltext);
5917                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5918                                 $ltext = esc_html($1, -nbsp=>1);
5919                                 $ltext .= '<span class="match">';
5920                                 $ltext .= esc_html($2, -nbsp=>1);
5921                                 $ltext .= '</span>';
5922                                 $ltext .= esc_html($3, -nbsp=>1);
5923                         } else {
5924                                 $ltext = esc_html($ltext, -nbsp=>1);
5925                         }
5926                         print "<div class=\"pre\">" .
5927                                 $cgi->a({-href => $file_href.'#l'.$lno,
5928                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5929                                 ' ' .  $ltext . "</div>\n";
5930                 }
5931         }
5932         if ($lastfile) {
5933                 print "</td></tr>\n";
5934                 if ($matches > 1000) {
5935                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5936                 }
5937         } else {
5938                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5939         }
5940         close $fd;
5941
5942         print "</table>\n";
5943
5944         git_footer_html();
5945 }
5946
5947 sub git_search_grep_body {
5948         my ($commitlist, $from, $to, $extra) = @_;
5949         $from = 0 unless defined $from;
5950         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5951
5952         print "<table class=\"commit_search\">\n";
5953         my $alternate = 1;
5954         for (my $i = $from; $i <= $to; $i++) {
5955                 my %co = %{$commitlist->[$i]};
5956                 if (!%co) {
5957                         next;
5958                 }
5959                 my $commit = $co{'id'};
5960                 if ($alternate) {
5961                         print "<tr class=\"dark\">\n";
5962                 } else {
5963                         print "<tr class=\"light\">\n";
5964                 }
5965                 $alternate ^= 1;
5966                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5967                       format_author_html('td', \%co, 15, 5) .
5968                       "<td>" .
5969                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5970                                -class => "list subject"},
5971                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5972                 my $comment = $co{'comment'};
5973                 foreach my $line (@$comment) {
5974                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5975                                 my ($lead, $match, $trail) = ($1, $2, $3);
5976                                 $match = chop_str($match, 70, 5, 'center');
5977                                 my $contextlen = int((80 - length($match))/2);
5978                                 $contextlen = 30 if ($contextlen > 30);
5979                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5980                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5981
5982                                 $lead  = esc_html($lead);
5983                                 $match = esc_html($match);
5984                                 $trail = esc_html($trail);
5985
5986                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5987                         }
5988                 }
5989                 print "</td>\n" .
5990                       "<td class=\"link\">" .
5991                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5992                       " | " .
5993                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5994                       " | " .
5995                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5996                 print "</td>\n" .
5997                       "</tr>\n";
5998         }
5999         if (defined $extra) {
6000                 print "<tr>\n" .
6001                       "<td colspan=\"3\">$extra</td>\n" .
6002                       "</tr>\n";
6003         }
6004         print "</table>\n";
6005 }
6006
6007 ## ======================================================================
6008 ## ======================================================================
6009 ## actions
6010
6011 sub git_project_list {
6012         my $order = $input_params{'order'};
6013         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6014                 die_error(400, "Unknown order parameter");
6015         }
6016
6017         my @list = git_get_projects_list($project_filter, $strict_export);
6018         if (!@list) {
6019                 die_error(404, "No projects found");
6020         }
6021
6022         git_header_html();
6023         if (defined $home_text && -f $home_text) {
6024                 print "<div class=\"index_include\">\n";
6025                 insert_file($home_text);
6026                 print "</div>\n";
6027         }
6028         print $cgi->startform(-method => "get") .
6029               "<p class=\"projsearch\">Search:\n" .
6030               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6031               "</p>" .
6032               $cgi->end_form() . "\n";
6033         git_project_list_body(\@list, $order);
6034         git_footer_html();
6035 }
6036
6037 sub git_forks {
6038         my $order = $input_params{'order'};
6039         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6040                 die_error(400, "Unknown order parameter");
6041         }
6042
6043         my $filter = $project;
6044         $filter =~ s/\.git$//;
6045         my @list = git_get_projects_list($filter);
6046         if (!@list) {
6047                 die_error(404, "No forks found");
6048         }
6049
6050         git_header_html();
6051         git_print_page_nav('','');
6052         git_print_header_div('summary', "$project forks");
6053         git_project_list_body(\@list, $order);
6054         git_footer_html();
6055 }
6056
6057 sub git_project_index {
6058         my @projects = git_get_projects_list($project_filter, $strict_export);
6059         if (!@projects) {
6060                 die_error(404, "No projects found");
6061         }
6062
6063         print $cgi->header(
6064                 -type => 'text/plain',
6065                 -charset => 'utf-8',
6066                 -content_disposition => 'inline; filename="index.aux"');
6067
6068         foreach my $pr (@projects) {
6069                 if (!exists $pr->{'owner'}) {
6070                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6071                 }
6072
6073                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6074                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6075                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6076                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6077                 $path  =~ s/ /\+/g;
6078                 $owner =~ s/ /\+/g;
6079
6080                 print "$path $owner\n";
6081         }
6082 }
6083
6084 sub git_summary {
6085         my $descr = git_get_project_description($project) || "none";
6086         my %co = parse_commit("HEAD");
6087         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6088         my $head = $co{'id'};
6089         my $remote_heads = gitweb_check_feature('remote_heads');
6090
6091         my $owner = git_get_project_owner($project);
6092
6093         my $refs = git_get_references();
6094         # These get_*_list functions return one more to allow us to see if
6095         # there are more ...
6096         my @taglist  = git_get_tags_list(16);
6097         my @headlist = git_get_heads_list(16);
6098         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6099         my @forklist;
6100         my $check_forks = gitweb_check_feature('forks');
6101
6102         if ($check_forks) {
6103                 # find forks of a project
6104                 my $filter = $project;
6105                 $filter =~ s/\.git$//;
6106                 @forklist = git_get_projects_list($filter);
6107                 # filter out forks of forks
6108                 @forklist = filter_forks_from_projects_list(\@forklist)
6109                         if (@forklist);
6110         }
6111
6112         git_header_html();
6113         git_print_page_nav('summary','', $head);
6114
6115         print "<div class=\"title\">&nbsp;</div>\n";
6116         print "<table class=\"projects_list\">\n" .
6117               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6118               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6119         if (defined $cd{'rfc2822'}) {
6120                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6121                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6122         }
6123
6124         # use per project git URL list in $projectroot/$project/cloneurl
6125         # or make project git URL from git base URL and project name
6126         my $url_tag = "URL";
6127         my @url_list = git_get_project_url_list($project);
6128         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6129         foreach my $git_url (@url_list) {
6130                 next unless $git_url;
6131                 print format_repo_url($url_tag, $git_url);
6132                 $url_tag = "";
6133         }
6134
6135         # Tag cloud
6136         my $show_ctags = gitweb_check_feature('ctags');
6137         if ($show_ctags) {
6138                 my $ctags = git_get_project_ctags($project);
6139                 if (%$ctags) {
6140                         # without ability to add tags, don't show if there are none
6141                         my $cloud = git_populate_project_tagcloud($ctags);
6142                         print "<tr id=\"metadata_ctags\">" .
6143                               "<td>content tags</td>" .
6144                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6145                               "</tr>\n";
6146                 }
6147         }
6148
6149         print "</table>\n";
6150
6151         # If XSS prevention is on, we don't include README.html.
6152         # TODO: Allow a readme in some safe format.
6153         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6154                 print "<div class=\"title\">readme</div>\n" .
6155                       "<div class=\"readme\">\n";
6156                 insert_file("$projectroot/$project/README.html");
6157                 print "\n</div>\n"; # class="readme"
6158         }
6159
6160         # we need to request one more than 16 (0..15) to check if
6161         # those 16 are all
6162         my @commitlist = $head ? parse_commits($head, 17) : ();
6163         if (@commitlist) {
6164                 git_print_header_div('shortlog');
6165                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6166                                   $#commitlist <=  15 ? undef :
6167                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6168         }
6169
6170         if (@taglist) {
6171                 git_print_header_div('tags');
6172                 git_tags_body(\@taglist, 0, 15,
6173                               $#taglist <=  15 ? undef :
6174                               $cgi->a({-href => href(action=>"tags")}, "..."));
6175         }
6176
6177         if (@headlist) {
6178                 git_print_header_div('heads');
6179                 git_heads_body(\@headlist, $head, 0, 15,
6180                                $#headlist <= 15 ? undef :
6181                                $cgi->a({-href => href(action=>"heads")}, "..."));
6182         }
6183
6184         if (%remotedata) {
6185                 git_print_header_div('remotes');
6186                 git_remotes_body(\%remotedata, 15, $head);
6187         }
6188
6189         if (@forklist) {
6190                 git_print_header_div('forks');
6191                 git_project_list_body(\@forklist, 'age', 0, 15,
6192                                       $#forklist <= 15 ? undef :
6193                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6194                                       'no_header');
6195         }
6196
6197         git_footer_html();
6198 }
6199
6200 sub git_tag {
6201         my %tag = parse_tag($hash);
6202
6203         if (! %tag) {
6204                 die_error(404, "Unknown tag object");
6205         }
6206
6207         my $head = git_get_head_hash($project);
6208         git_header_html();
6209         git_print_page_nav('','', $head,undef,$head);
6210         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6211         print "<div class=\"title_text\">\n" .
6212               "<table class=\"object_header\">\n" .
6213               "<tr>\n" .
6214               "<td>object</td>\n" .
6215               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6216                                $tag{'object'}) . "</td>\n" .
6217               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6218                                               $tag{'type'}) . "</td>\n" .
6219               "</tr>\n";
6220         if (defined($tag{'author'})) {
6221                 git_print_authorship_rows(\%tag, 'author');
6222         }
6223         print "</table>\n\n" .
6224               "</div>\n";
6225         print "<div class=\"page_body\">";
6226         my $comment = $tag{'comment'};
6227         foreach my $line (@$comment) {
6228                 chomp $line;
6229                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6230         }
6231         print "</div>\n";
6232         git_footer_html();
6233 }
6234
6235 sub git_blame_common {
6236         my $format = shift || 'porcelain';
6237         if ($format eq 'porcelain' && $cgi->param('js')) {
6238                 $format = 'incremental';
6239                 $action = 'blame_incremental'; # for page title etc
6240         }
6241
6242         # permissions
6243         gitweb_check_feature('blame')
6244                 or die_error(403, "Blame view not allowed");
6245
6246         # error checking
6247         die_error(400, "No file name given") unless $file_name;
6248         $hash_base ||= git_get_head_hash($project);
6249         die_error(404, "Couldn't find base commit") unless $hash_base;
6250         my %co = parse_commit($hash_base)
6251                 or die_error(404, "Commit not found");
6252         my $ftype = "blob";
6253         if (!defined $hash) {
6254                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6255                         or die_error(404, "Error looking up file");
6256         } else {
6257                 $ftype = git_get_type($hash);
6258                 if ($ftype !~ "blob") {
6259                         die_error(400, "Object is not a blob");
6260                 }
6261         }
6262
6263         my $fd;
6264         if ($format eq 'incremental') {
6265                 # get file contents (as base)
6266                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6267                         or die_error(500, "Open git-cat-file failed");
6268         } elsif ($format eq 'data') {
6269                 # run git-blame --incremental
6270                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6271                         $hash_base, "--", $file_name
6272                         or die_error(500, "Open git-blame --incremental failed");
6273         } else {
6274                 # run git-blame --porcelain
6275                 open $fd, "-|", git_cmd(), "blame", '-p',
6276                         $hash_base, '--', $file_name
6277                         or die_error(500, "Open git-blame --porcelain failed");
6278         }
6279
6280         # incremental blame data returns early
6281         if ($format eq 'data') {
6282                 print $cgi->header(
6283                         -type=>"text/plain", -charset => "utf-8",
6284                         -status=> "200 OK");
6285                 local $| = 1; # output autoflush
6286                 while (my $line = <$fd>) {
6287                         print to_utf8($line);
6288                 }
6289                 close $fd
6290                         or print "ERROR $!\n";
6291
6292                 print 'END';
6293                 if (defined $t0 && gitweb_check_feature('timed')) {
6294                         print ' '.
6295                               tv_interval($t0, [ gettimeofday() ]).
6296                               ' '.$number_of_git_cmds;
6297                 }
6298                 print "\n";
6299
6300                 return;
6301         }
6302
6303         # page header
6304         git_header_html();
6305         my $formats_nav =
6306                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6307                         "blob") .
6308                 " | ";
6309         if ($format eq 'incremental') {
6310                 $formats_nav .=
6311                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6312                                 "blame") . " (non-incremental)";
6313         } else {
6314                 $formats_nav .=
6315                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6316                                 "blame") . " (incremental)";
6317         }
6318         $formats_nav .=
6319                 " | " .
6320                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6321                         "history") .
6322                 " | " .
6323                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6324                         "HEAD");
6325         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6326         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6327         git_print_page_path($file_name, $ftype, $hash_base);
6328
6329         # page body
6330         if ($format eq 'incremental') {
6331                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6332                       "This page requires JavaScript to run.\n Use ".
6333                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6334                               'this page').
6335                       " instead.\n".
6336                       "</b></center></div>\n</noscript>\n";
6337
6338                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6339         }
6340
6341         print qq!<div class="page_body">\n!;
6342         print qq!<div id="progress_info">... / ...</div>\n!
6343                 if ($format eq 'incremental');
6344         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6345               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6346               qq!<thead>\n!.
6347               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6348               qq!</thead>\n!.
6349               qq!<tbody>\n!;
6350
6351         my @rev_color = qw(light dark);
6352         my $num_colors = scalar(@rev_color);
6353         my $current_color = 0;
6354
6355         if ($format eq 'incremental') {
6356                 my $color_class = $rev_color[$current_color];
6357
6358                 #contents of a file
6359                 my $linenr = 0;
6360         LINE:
6361                 while (my $line = <$fd>) {
6362                         chomp $line;
6363                         $linenr++;
6364
6365                         print qq!<tr id="l$linenr" class="$color_class">!.
6366                               qq!<td class="sha1"><a href=""> </a></td>!.
6367                               qq!<td class="linenr">!.
6368                               qq!<a class="linenr" href="">$linenr</a></td>!;
6369                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6370                         print qq!</tr>\n!;
6371                 }
6372
6373         } else { # porcelain, i.e. ordinary blame
6374                 my %metainfo = (); # saves information about commits
6375
6376                 # blame data
6377         LINE:
6378                 while (my $line = <$fd>) {
6379                         chomp $line;
6380                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6381                         # no <lines in group> for subsequent lines in group of lines
6382                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6383                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6384                         if (!exists $metainfo{$full_rev}) {
6385                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6386                         }
6387                         my $meta = $metainfo{$full_rev};
6388                         my $data;
6389                         while ($data = <$fd>) {
6390                                 chomp $data;
6391                                 last if ($data =~ s/^\t//); # contents of line
6392                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6393                                         $meta->{$1} = $2 unless exists $meta->{$1};
6394                                 }
6395                                 if ($data =~ /^previous /) {
6396                                         $meta->{'nprevious'}++;
6397                                 }
6398                         }
6399                         my $short_rev = substr($full_rev, 0, 8);
6400                         my $author = $meta->{'author'};
6401                         my %date =
6402                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6403                         my $date = $date{'iso-tz'};
6404                         if ($group_size) {
6405                                 $current_color = ($current_color + 1) % $num_colors;
6406                         }
6407                         my $tr_class = $rev_color[$current_color];
6408                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6409                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6410                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6411                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6412                         if ($group_size) {
6413                                 print "<td class=\"sha1\"";
6414                                 print " title=\"". esc_html($author) . ", $date\"";
6415                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6416                                 print ">";
6417                                 print $cgi->a({-href => href(action=>"commit",
6418                                                              hash=>$full_rev,
6419                                                              file_name=>$file_name)},
6420                                               esc_html($short_rev));
6421                                 if ($group_size >= 2) {
6422                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6423                                         if (@author_initials) {
6424                                                 print "<br />" .
6425                                                       esc_html(join('', @author_initials));
6426                                                 #           or join('.', ...)
6427                                         }
6428                                 }
6429                                 print "</td>\n";
6430                         }
6431                         # 'previous' <sha1 of parent commit> <filename at commit>
6432                         if (exists $meta->{'previous'} &&
6433                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6434                                 $meta->{'parent'} = $1;
6435                                 $meta->{'file_parent'} = unquote($2);
6436                         }
6437                         my $linenr_commit =
6438                                 exists($meta->{'parent'}) ?
6439                                 $meta->{'parent'} : $full_rev;
6440                         my $linenr_filename =
6441                                 exists($meta->{'file_parent'}) ?
6442                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6443                         my $blamed = href(action => 'blame',
6444                                           file_name => $linenr_filename,
6445                                           hash_base => $linenr_commit);
6446                         print "<td class=\"linenr\">";
6447                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6448                                         -class => "linenr" },
6449                                       esc_html($lineno));
6450                         print "</td>";
6451                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6452                         print "</tr>\n";
6453                 } # end while
6454
6455         }
6456
6457         # footer
6458         print "</tbody>\n".
6459               "</table>\n"; # class="blame"
6460         print "</div>\n";   # class="blame_body"
6461         close $fd
6462                 or print "Reading blob failed\n";
6463
6464         git_footer_html();
6465 }
6466
6467 sub git_blame {
6468         git_blame_common();
6469 }
6470
6471 sub git_blame_incremental {
6472         git_blame_common('incremental');
6473 }
6474
6475 sub git_blame_data {
6476         git_blame_common('data');
6477 }
6478
6479 sub git_tags {
6480         my $head = git_get_head_hash($project);
6481         git_header_html();
6482         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6483         git_print_header_div('summary', $project);
6484
6485         my @tagslist = git_get_tags_list();
6486         if (@tagslist) {
6487                 git_tags_body(\@tagslist);
6488         }
6489         git_footer_html();
6490 }
6491
6492 sub git_heads {
6493         my $head = git_get_head_hash($project);
6494         git_header_html();
6495         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6496         git_print_header_div('summary', $project);
6497
6498         my @headslist = git_get_heads_list();
6499         if (@headslist) {
6500                 git_heads_body(\@headslist, $head);
6501         }
6502         git_footer_html();
6503 }
6504
6505 # used both for single remote view and for list of all the remotes
6506 sub git_remotes {
6507         gitweb_check_feature('remote_heads')
6508                 or die_error(403, "Remote heads view is disabled");
6509
6510         my $head = git_get_head_hash($project);
6511         my $remote = $input_params{'hash'};
6512
6513         my $remotedata = git_get_remotes_list($remote);
6514         die_error(500, "Unable to get remote information") unless defined $remotedata;
6515
6516         unless (%$remotedata) {
6517                 die_error(404, defined $remote ?
6518                         "Remote $remote not found" :
6519                         "No remotes found");
6520         }
6521
6522         git_header_html(undef, undef, -action_extra => $remote);
6523         git_print_page_nav('', '',  $head, undef, $head,
6524                 format_ref_views($remote ? '' : 'remotes'));
6525
6526         fill_remote_heads($remotedata);
6527         if (defined $remote) {
6528                 git_print_header_div('remotes', "$remote remote for $project");
6529                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6530         } else {
6531                 git_print_header_div('summary', "$project remotes");
6532                 git_remotes_body($remotedata, undef, $head);
6533         }
6534
6535         git_footer_html();
6536 }
6537
6538 sub git_blob_plain {
6539         my $type = shift;
6540         my $expires;
6541
6542         if (!defined $hash) {
6543                 if (defined $file_name) {
6544                         my $base = $hash_base || git_get_head_hash($project);
6545                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6546                                 or die_error(404, "Cannot find file");
6547                 } else {
6548                         die_error(400, "No file name defined");
6549                 }
6550         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6551                 # blobs defined by non-textual hash id's can be cached
6552                 $expires = "+1d";
6553         }
6554
6555         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6556                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6557
6558         # content-type (can include charset)
6559         $type = blob_contenttype($fd, $file_name, $type);
6560
6561         # "save as" filename, even when no $file_name is given
6562         my $save_as = "$hash";
6563         if (defined $file_name) {
6564                 $save_as = $file_name;
6565         } elsif ($type =~ m/^text\//) {
6566                 $save_as .= '.txt';
6567         }
6568
6569         # With XSS prevention on, blobs of all types except a few known safe
6570         # ones are served with "Content-Disposition: attachment" to make sure
6571         # they don't run in our security domain.  For certain image types,
6572         # blob view writes an <img> tag referring to blob_plain view, and we
6573         # want to be sure not to break that by serving the image as an
6574         # attachment (though Firefox 3 doesn't seem to care).
6575         my $sandbox = $prevent_xss &&
6576                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6577
6578         # serve text/* as text/plain
6579         if ($prevent_xss &&
6580             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6581              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6582                 my $rest = $1;
6583                 $rest = defined $rest ? $rest : '';
6584                 $type = "text/plain$rest";
6585         }
6586
6587         print $cgi->header(
6588                 -type => $type,
6589                 -expires => $expires,
6590                 -content_disposition =>
6591                         ($sandbox ? 'attachment' : 'inline')
6592                         . '; filename="' . $save_as . '"');
6593         local $/ = undef;
6594         binmode STDOUT, ':raw';
6595         print <$fd>;
6596         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6597         close $fd;
6598 }
6599
6600 sub git_blob {
6601         my $expires;
6602
6603         if (!defined $hash) {
6604                 if (defined $file_name) {
6605                         my $base = $hash_base || git_get_head_hash($project);
6606                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6607                                 or die_error(404, "Cannot find file");
6608                 } else {
6609                         die_error(400, "No file name defined");
6610                 }
6611         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6612                 # blobs defined by non-textual hash id's can be cached
6613                 $expires = "+1d";
6614         }
6615
6616         my $have_blame = gitweb_check_feature('blame');
6617         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6618                 or die_error(500, "Couldn't cat $file_name, $hash");
6619         my $mimetype = blob_mimetype($fd, $file_name);
6620         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6621         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6622                 close $fd;
6623                 return git_blob_plain($mimetype);
6624         }
6625         # we can have blame only for text/* mimetype
6626         $have_blame &&= ($mimetype =~ m!^text/!);
6627
6628         my $highlight = gitweb_check_feature('highlight');
6629         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6630         $fd = run_highlighter($fd, $highlight, $syntax)
6631                 if $syntax;
6632
6633         git_header_html(undef, $expires);
6634         my $formats_nav = '';
6635         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6636                 if (defined $file_name) {
6637                         if ($have_blame) {
6638                                 $formats_nav .=
6639                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6640                                                 "blame") .
6641                                         " | ";
6642                         }
6643                         $formats_nav .=
6644                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6645                                         "history") .
6646                                 " | " .
6647                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6648                                         "raw") .
6649                                 " | " .
6650                                 $cgi->a({-href => href(action=>"blob",
6651                                                        hash_base=>"HEAD", file_name=>$file_name)},
6652                                         "HEAD");
6653                 } else {
6654                         $formats_nav .=
6655                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6656                                         "raw");
6657                 }
6658                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6659                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6660         } else {
6661                 print "<div class=\"page_nav\">\n" .
6662                       "<br/><br/></div>\n" .
6663                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6664         }
6665         git_print_page_path($file_name, "blob", $hash_base);
6666         print "<div class=\"page_body\">\n";
6667         if ($mimetype =~ m!^image/!) {
6668                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6669                 if ($file_name) {
6670                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6671                 }
6672                 print qq! src="! .
6673                       href(action=>"blob_plain", hash=>$hash,
6674                            hash_base=>$hash_base, file_name=>$file_name) .
6675                       qq!" />\n!;
6676         } else {
6677                 my $nr;
6678                 while (my $line = <$fd>) {
6679                         chomp $line;
6680                         $nr++;
6681                         $line = untabify($line);
6682                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6683                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6684                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6685                 }
6686         }
6687         close $fd
6688                 or print "Reading blob failed.\n";
6689         print "</div>";
6690         git_footer_html();
6691 }
6692
6693 sub git_tree {
6694         if (!defined $hash_base) {
6695                 $hash_base = "HEAD";
6696         }
6697         if (!defined $hash) {
6698                 if (defined $file_name) {
6699                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6700                 } else {
6701                         $hash = $hash_base;
6702                 }
6703         }
6704         die_error(404, "No such tree") unless defined($hash);
6705
6706         my $show_sizes = gitweb_check_feature('show-sizes');
6707         my $have_blame = gitweb_check_feature('blame');
6708
6709         my @entries = ();
6710         {
6711                 local $/ = "\0";
6712                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6713                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6714                         or die_error(500, "Open git-ls-tree failed");
6715                 @entries = map { chomp; $_ } <$fd>;
6716                 close $fd
6717                         or die_error(404, "Reading tree failed");
6718         }
6719
6720         my $refs = git_get_references();
6721         my $ref = format_ref_marker($refs, $hash_base);
6722         git_header_html();
6723         my $basedir = '';
6724         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6725                 my @views_nav = ();
6726                 if (defined $file_name) {
6727                         push @views_nav,
6728                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6729                                         "history"),
6730                                 $cgi->a({-href => href(action=>"tree",
6731                                                        hash_base=>"HEAD", file_name=>$file_name)},
6732                                         "HEAD"),
6733                 }
6734                 my $snapshot_links = format_snapshot_links($hash);
6735                 if (defined $snapshot_links) {
6736                         # FIXME: Should be available when we have no hash base as well.
6737                         push @views_nav, $snapshot_links;
6738                 }
6739                 git_print_page_nav('tree','', $hash_base, undef, undef,
6740                                    join(' | ', @views_nav));
6741                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6742         } else {
6743                 undef $hash_base;
6744                 print "<div class=\"page_nav\">\n";
6745                 print "<br/><br/></div>\n";
6746                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6747         }
6748         if (defined $file_name) {
6749                 $basedir = $file_name;
6750                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6751                         $basedir .= '/';
6752                 }
6753                 git_print_page_path($file_name, 'tree', $hash_base);
6754         }
6755         print "<div class=\"page_body\">\n";
6756         print "<table class=\"tree\">\n";
6757         my $alternate = 1;
6758         # '..' (top directory) link if possible
6759         if (defined $hash_base &&
6760             defined $file_name && $file_name =~ m![^/]+$!) {
6761                 if ($alternate) {
6762                         print "<tr class=\"dark\">\n";
6763                 } else {
6764                         print "<tr class=\"light\">\n";
6765                 }
6766                 $alternate ^= 1;
6767
6768                 my $up = $file_name;
6769                 $up =~ s!/?[^/]+$!!;
6770                 undef $up unless $up;
6771                 # based on git_print_tree_entry
6772                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6773                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6774                 print '<td class="list">';
6775                 print $cgi->a({-href => href(action=>"tree",
6776                                              hash_base=>$hash_base,
6777                                              file_name=>$up)},
6778                               "..");
6779                 print "</td>\n";
6780                 print "<td class=\"link\"></td>\n";
6781
6782                 print "</tr>\n";
6783         }
6784         foreach my $line (@entries) {
6785                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6786
6787                 if ($alternate) {
6788                         print "<tr class=\"dark\">\n";
6789                 } else {
6790                         print "<tr class=\"light\">\n";
6791                 }
6792                 $alternate ^= 1;
6793
6794                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6795
6796                 print "</tr>\n";
6797         }
6798         print "</table>\n" .
6799               "</div>";
6800         git_footer_html();
6801 }
6802
6803 sub snapshot_name {
6804         my ($project, $hash) = @_;
6805
6806         # path/to/project.git  -> project
6807         # path/to/project/.git -> project
6808         my $name = to_utf8($project);
6809         $name =~ s,([^/])/*\.git$,$1,;
6810         $name = basename($name);
6811         # sanitize name
6812         $name =~ s/[[:cntrl:]]/?/g;
6813
6814         my $ver = $hash;
6815         if ($hash =~ /^[0-9a-fA-F]+$/) {
6816                 # shorten SHA-1 hash
6817                 my $full_hash = git_get_full_hash($project, $hash);
6818                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6819                         $ver = git_get_short_hash($project, $hash);
6820                 }
6821         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6822                 # tags don't need shortened SHA-1 hash
6823                 $ver = $1;
6824         } else {
6825                 # branches and other need shortened SHA-1 hash
6826                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6827                         $ver = $1;
6828                 }
6829                 $ver .= '-' . git_get_short_hash($project, $hash);
6830         }
6831         # in case of hierarchical branch names
6832         $ver =~ s!/!.!g;
6833
6834         # name = project-version_string
6835         $name = "$name-$ver";
6836
6837         return wantarray ? ($name, $name) : $name;
6838 }
6839
6840 sub git_snapshot {
6841         my $format = $input_params{'snapshot_format'};
6842         if (!@snapshot_fmts) {
6843                 die_error(403, "Snapshots not allowed");
6844         }
6845         # default to first supported snapshot format
6846         $format ||= $snapshot_fmts[0];
6847         if ($format !~ m/^[a-z0-9]+$/) {
6848                 die_error(400, "Invalid snapshot format parameter");
6849         } elsif (!exists($known_snapshot_formats{$format})) {
6850                 die_error(400, "Unknown snapshot format");
6851         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6852                 die_error(403, "Snapshot format not allowed");
6853         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6854                 die_error(403, "Unsupported snapshot format");
6855         }
6856
6857         my $type = git_get_type("$hash^{}");
6858         if (!$type) {
6859                 die_error(404, 'Object does not exist');
6860         }  elsif ($type eq 'blob') {
6861                 die_error(400, 'Object is not a tree-ish');
6862         }
6863
6864         my ($name, $prefix) = snapshot_name($project, $hash);
6865         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6866         my $cmd = quote_command(
6867                 git_cmd(), 'archive',
6868                 "--format=$known_snapshot_formats{$format}{'format'}",
6869                 "--prefix=$prefix/", $hash);
6870         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6871                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6872         }
6873
6874         $filename =~ s/(["\\])/\\$1/g;
6875         print $cgi->header(
6876                 -type => $known_snapshot_formats{$format}{'type'},
6877                 -content_disposition => 'inline; filename="' . $filename . '"',
6878                 -status => '200 OK');
6879
6880         open my $fd, "-|", $cmd
6881                 or die_error(500, "Execute git-archive failed");
6882         binmode STDOUT, ':raw';
6883         print <$fd>;
6884         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6885         close $fd;
6886 }
6887
6888 sub git_log_generic {
6889         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6890
6891         my $head = git_get_head_hash($project);
6892         if (!defined $base) {
6893                 $base = $head;
6894         }
6895         if (!defined $page) {
6896                 $page = 0;
6897         }
6898         my $refs = git_get_references();
6899
6900         my $commit_hash = $base;
6901         if (defined $parent) {
6902                 $commit_hash = "$parent..$base";
6903         }
6904         my @commitlist =
6905                 parse_commits($commit_hash, 101, (100 * $page),
6906                               defined $file_name ? ($file_name, "--full-history") : ());
6907
6908         my $ftype;
6909         if (!defined $file_hash && defined $file_name) {
6910                 # some commits could have deleted file in question,
6911                 # and not have it in tree, but one of them has to have it
6912                 for (my $i = 0; $i < @commitlist; $i++) {
6913                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6914                         last if defined $file_hash;
6915                 }
6916         }
6917         if (defined $file_hash) {
6918                 $ftype = git_get_type($file_hash);
6919         }
6920         if (defined $file_name && !defined $ftype) {
6921                 die_error(500, "Unknown type of object");
6922         }
6923         my %co;
6924         if (defined $file_name) {
6925                 %co = parse_commit($base)
6926                         or die_error(404, "Unknown commit object");
6927         }
6928
6929
6930         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6931         my $next_link = '';
6932         if ($#commitlist >= 100) {
6933                 $next_link =
6934                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6935                                  -accesskey => "n", -title => "Alt-n"}, "next");
6936         }
6937         my $patch_max = gitweb_get_feature('patches');
6938         if ($patch_max && !defined $file_name) {
6939                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6940                         $paging_nav .= " &sdot; " .
6941                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6942                                         "patches");
6943                 }
6944         }
6945
6946         git_header_html();
6947         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6948         if (defined $file_name) {
6949                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6950         } else {
6951                 git_print_header_div('summary', $project)
6952         }
6953         git_print_page_path($file_name, $ftype, $hash_base)
6954                 if (defined $file_name);
6955
6956         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6957                      $file_name, $file_hash, $ftype);
6958
6959         git_footer_html();
6960 }
6961
6962 sub git_log {
6963         git_log_generic('log', \&git_log_body,
6964                         $hash, $hash_parent);
6965 }
6966
6967 sub git_commit {
6968         $hash ||= $hash_base || "HEAD";
6969         my %co = parse_commit($hash)
6970             or die_error(404, "Unknown commit object");
6971
6972         my $parent  = $co{'parent'};
6973         my $parents = $co{'parents'}; # listref
6974
6975         # we need to prepare $formats_nav before any parameter munging
6976         my $formats_nav;
6977         if (!defined $parent) {
6978                 # --root commitdiff
6979                 $formats_nav .= '(initial)';
6980         } elsif (@$parents == 1) {
6981                 # single parent commit
6982                 $formats_nav .=
6983                         '(parent: ' .
6984                         $cgi->a({-href => href(action=>"commit",
6985                                                hash=>$parent)},
6986                                 esc_html(substr($parent, 0, 7))) .
6987                         ')';
6988         } else {
6989                 # merge commit
6990                 $formats_nav .=
6991                         '(merge: ' .
6992                         join(' ', map {
6993                                 $cgi->a({-href => href(action=>"commit",
6994                                                        hash=>$_)},
6995                                         esc_html(substr($_, 0, 7)));
6996                         } @$parents ) .
6997                         ')';
6998         }
6999         if (gitweb_check_feature('patches') && @$parents <= 1) {
7000                 $formats_nav .= " | " .
7001                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7002                                 "patch");
7003         }
7004
7005         if (!defined $parent) {
7006                 $parent = "--root";
7007         }
7008         my @difftree;
7009         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7010                 @diff_opts,
7011                 (@$parents <= 1 ? $parent : '-c'),
7012                 $hash, "--"
7013                 or die_error(500, "Open git-diff-tree failed");
7014         @difftree = map { chomp; $_ } <$fd>;
7015         close $fd or die_error(404, "Reading git-diff-tree failed");
7016
7017         # non-textual hash id's can be cached
7018         my $expires;
7019         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7020                 $expires = "+1d";
7021         }
7022         my $refs = git_get_references();
7023         my $ref = format_ref_marker($refs, $co{'id'});
7024
7025         git_header_html(undef, $expires);
7026         git_print_page_nav('commit', '',
7027                            $hash, $co{'tree'}, $hash,
7028                            $formats_nav);
7029
7030         if (defined $co{'parent'}) {
7031                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7032         } else {
7033                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7034         }
7035         print "<div class=\"title_text\">\n" .
7036               "<table class=\"object_header\">\n";
7037         git_print_authorship_rows(\%co);
7038         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7039         print "<tr>" .
7040               "<td>tree</td>" .
7041               "<td class=\"sha1\">" .
7042               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7043                        class => "list"}, $co{'tree'}) .
7044               "</td>" .
7045               "<td class=\"link\">" .
7046               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7047                       "tree");
7048         my $snapshot_links = format_snapshot_links($hash);
7049         if (defined $snapshot_links) {
7050                 print " | " . $snapshot_links;
7051         }
7052         print "</td>" .
7053               "</tr>\n";
7054
7055         foreach my $par (@$parents) {
7056                 print "<tr>" .
7057                       "<td>parent</td>" .
7058                       "<td class=\"sha1\">" .
7059                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7060                                class => "list"}, $par) .
7061                       "</td>" .
7062                       "<td class=\"link\">" .
7063                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7064                       " | " .
7065                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7066                       "</td>" .
7067                       "</tr>\n";
7068         }
7069         print "</table>".
7070               "</div>\n";
7071
7072         print "<div class=\"page_body\">\n";
7073         git_print_log($co{'comment'});
7074         print "</div>\n";
7075
7076         git_difftree_body(\@difftree, $hash, @$parents);
7077
7078         git_footer_html();
7079 }
7080
7081 sub git_object {
7082         # object is defined by:
7083         # - hash or hash_base alone
7084         # - hash_base and file_name
7085         my $type;
7086
7087         # - hash or hash_base alone
7088         if ($hash || ($hash_base && !defined $file_name)) {
7089                 my $object_id = $hash || $hash_base;
7090
7091                 open my $fd, "-|", quote_command(
7092                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7093                         or die_error(404, "Object does not exist");
7094                 $type = <$fd>;
7095                 chomp $type;
7096                 close $fd
7097                         or die_error(404, "Object does not exist");
7098
7099         # - hash_base and file_name
7100         } elsif ($hash_base && defined $file_name) {
7101                 $file_name =~ s,/+$,,;
7102
7103                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7104                         or die_error(404, "Base object does not exist");
7105
7106                 # here errors should not hapen
7107                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7108                         or die_error(500, "Open git-ls-tree failed");
7109                 my $line = <$fd>;
7110                 close $fd;
7111
7112                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7113                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7114                         die_error(404, "File or directory for given base does not exist");
7115                 }
7116                 $type = $2;
7117                 $hash = $3;
7118         } else {
7119                 die_error(400, "Not enough information to find object");
7120         }
7121
7122         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7123                                           hash=>$hash, hash_base=>$hash_base,
7124                                           file_name=>$file_name),
7125                              -status => '302 Found');
7126 }
7127
7128 sub git_blobdiff {
7129         my $format = shift || 'html';
7130         my $diff_style = $input_params{'diff_style'} || 'inline';
7131
7132         my $fd;
7133         my @difftree;
7134         my %diffinfo;
7135         my $expires;
7136
7137         # preparing $fd and %diffinfo for git_patchset_body
7138         # new style URI
7139         if (defined $hash_base && defined $hash_parent_base) {
7140                 if (defined $file_name) {
7141                         # read raw output
7142                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7143                                 $hash_parent_base, $hash_base,
7144                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7145                                 or die_error(500, "Open git-diff-tree failed");
7146                         @difftree = map { chomp; $_ } <$fd>;
7147                         close $fd
7148                                 or die_error(404, "Reading git-diff-tree failed");
7149                         @difftree
7150                                 or die_error(404, "Blob diff not found");
7151
7152                 } elsif (defined $hash &&
7153                          $hash =~ /[0-9a-fA-F]{40}/) {
7154                         # try to find filename from $hash
7155
7156                         # read filtered raw output
7157                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7158                                 $hash_parent_base, $hash_base, "--"
7159                                 or die_error(500, "Open git-diff-tree failed");
7160                         @difftree =
7161                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7162                                 # $hash == to_id
7163                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7164                                 map { chomp; $_ } <$fd>;
7165                         close $fd
7166                                 or die_error(404, "Reading git-diff-tree failed");
7167                         @difftree
7168                                 or die_error(404, "Blob diff not found");
7169
7170                 } else {
7171                         die_error(400, "Missing one of the blob diff parameters");
7172                 }
7173
7174                 if (@difftree > 1) {
7175                         die_error(400, "Ambiguous blob diff specification");
7176                 }
7177
7178                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7179                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7180                 $file_name   ||= $diffinfo{'to_file'};
7181
7182                 $hash_parent ||= $diffinfo{'from_id'};
7183                 $hash        ||= $diffinfo{'to_id'};
7184
7185                 # non-textual hash id's can be cached
7186                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7187                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7188                         $expires = '+1d';
7189                 }
7190
7191                 # open patch output
7192                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7193                         '-p', ($format eq 'html' ? "--full-index" : ()),
7194                         $hash_parent_base, $hash_base,
7195                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7196                         or die_error(500, "Open git-diff-tree failed");
7197         }
7198
7199         # old/legacy style URI -- not generated anymore since 1.4.3.
7200         if (!%diffinfo) {
7201                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7202         }
7203
7204         # header
7205         if ($format eq 'html') {
7206                 my $formats_nav =
7207                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7208                                 "raw");
7209                 $formats_nav .= diff_style_nav($diff_style);
7210                 git_header_html(undef, $expires);
7211                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7212                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7213                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7214                 } else {
7215                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7216                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7217                 }
7218                 if (defined $file_name) {
7219                         git_print_page_path($file_name, "blob", $hash_base);
7220                 } else {
7221                         print "<div class=\"page_path\"></div>\n";
7222                 }
7223
7224         } elsif ($format eq 'plain') {
7225                 print $cgi->header(
7226                         -type => 'text/plain',
7227                         -charset => 'utf-8',
7228                         -expires => $expires,
7229                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7230
7231                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7232
7233         } else {
7234                 die_error(400, "Unknown blobdiff format");
7235         }
7236
7237         # patch
7238         if ($format eq 'html') {
7239                 print "<div class=\"page_body\">\n";
7240
7241                 git_patchset_body($fd, $diff_style,
7242                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7243                 close $fd;
7244
7245                 print "</div>\n"; # class="page_body"
7246                 git_footer_html();
7247
7248         } else {
7249                 while (my $line = <$fd>) {
7250                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7251                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7252
7253                         print $line;
7254
7255                         last if $line =~ m!^\+\+\+!;
7256                 }
7257                 local $/ = undef;
7258                 print <$fd>;
7259                 close $fd;
7260         }
7261 }
7262
7263 sub git_blobdiff_plain {
7264         git_blobdiff('plain');
7265 }
7266
7267 # assumes that it is added as later part of already existing navigation,
7268 # so it returns "| foo | bar" rather than just "foo | bar"
7269 sub diff_style_nav {
7270         my ($diff_style, $is_combined) = @_;
7271         $diff_style ||= 'inline';
7272
7273         return "" if ($is_combined);
7274
7275         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7276         my %styles = @styles;
7277         @styles =
7278                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7279
7280         return join '',
7281                 map { " | ".$_ }
7282                 map {
7283                         $_ eq $diff_style ? $styles{$_} :
7284                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7285                 } @styles;
7286 }
7287
7288 sub git_commitdiff {
7289         my %params = @_;
7290         my $format = $params{-format} || 'html';
7291         my $diff_style = $input_params{'diff_style'} || 'inline';
7292
7293         my ($patch_max) = gitweb_get_feature('patches');
7294         if ($format eq 'patch') {
7295                 die_error(403, "Patch view not allowed") unless $patch_max;
7296         }
7297
7298         $hash ||= $hash_base || "HEAD";
7299         my %co = parse_commit($hash)
7300             or die_error(404, "Unknown commit object");
7301
7302         # choose format for commitdiff for merge
7303         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7304                 $hash_parent = '--cc';
7305         }
7306         # we need to prepare $formats_nav before almost any parameter munging
7307         my $formats_nav;
7308         if ($format eq 'html') {
7309                 $formats_nav =
7310                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7311                                 "raw");
7312                 if ($patch_max && @{$co{'parents'}} <= 1) {
7313                         $formats_nav .= " | " .
7314                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7315                                         "patch");
7316                 }
7317                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7318
7319                 if (defined $hash_parent &&
7320                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7321                         # commitdiff with two commits given
7322                         my $hash_parent_short = $hash_parent;
7323                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7324                                 $hash_parent_short = substr($hash_parent, 0, 7);
7325                         }
7326                         $formats_nav .=
7327                                 ' (from';
7328                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7329                                 if ($co{'parents'}[$i] eq $hash_parent) {
7330                                         $formats_nav .= ' parent ' . ($i+1);
7331                                         last;
7332                                 }
7333                         }
7334                         $formats_nav .= ': ' .
7335                                 $cgi->a({-href => href(-replay=>1,
7336                                                        hash=>$hash_parent, hash_base=>undef)},
7337                                         esc_html($hash_parent_short)) .
7338                                 ')';
7339                 } elsif (!$co{'parent'}) {
7340                         # --root commitdiff
7341                         $formats_nav .= ' (initial)';
7342                 } elsif (scalar @{$co{'parents'}} == 1) {
7343                         # single parent commit
7344                         $formats_nav .=
7345                                 ' (parent: ' .
7346                                 $cgi->a({-href => href(-replay=>1,
7347                                                        hash=>$co{'parent'}, hash_base=>undef)},
7348                                         esc_html(substr($co{'parent'}, 0, 7))) .
7349                                 ')';
7350                 } else {
7351                         # merge commit
7352                         if ($hash_parent eq '--cc') {
7353                                 $formats_nav .= ' | ' .
7354                                         $cgi->a({-href => href(-replay=>1,
7355                                                                hash=>$hash, hash_parent=>'-c')},
7356                                                 'combined');
7357                         } else { # $hash_parent eq '-c'
7358                                 $formats_nav .= ' | ' .
7359                                         $cgi->a({-href => href(-replay=>1,
7360                                                                hash=>$hash, hash_parent=>'--cc')},
7361                                                 'compact');
7362                         }
7363                         $formats_nav .=
7364                                 ' (merge: ' .
7365                                 join(' ', map {
7366                                         $cgi->a({-href => href(-replay=>1,
7367                                                                hash=>$_, hash_base=>undef)},
7368                                                 esc_html(substr($_, 0, 7)));
7369                                 } @{$co{'parents'}} ) .
7370                                 ')';
7371                 }
7372         }
7373
7374         my $hash_parent_param = $hash_parent;
7375         if (!defined $hash_parent_param) {
7376                 # --cc for multiple parents, --root for parentless
7377                 $hash_parent_param =
7378                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7379         }
7380
7381         # read commitdiff
7382         my $fd;
7383         my @difftree;
7384         if ($format eq 'html') {
7385                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7386                         "--no-commit-id", "--patch-with-raw", "--full-index",
7387                         $hash_parent_param, $hash, "--"
7388                         or die_error(500, "Open git-diff-tree failed");
7389
7390                 while (my $line = <$fd>) {
7391                         chomp $line;
7392                         # empty line ends raw part of diff-tree output
7393                         last unless $line;
7394                         push @difftree, scalar parse_difftree_raw_line($line);
7395                 }
7396
7397         } elsif ($format eq 'plain') {
7398                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7399                         '-p', $hash_parent_param, $hash, "--"
7400                         or die_error(500, "Open git-diff-tree failed");
7401         } elsif ($format eq 'patch') {
7402                 # For commit ranges, we limit the output to the number of
7403                 # patches specified in the 'patches' feature.
7404                 # For single commits, we limit the output to a single patch,
7405                 # diverging from the git-format-patch default.
7406                 my @commit_spec = ();
7407                 if ($hash_parent) {
7408                         if ($patch_max > 0) {
7409                                 push @commit_spec, "-$patch_max";
7410                         }
7411                         push @commit_spec, '-n', "$hash_parent..$hash";
7412                 } else {
7413                         if ($params{-single}) {
7414                                 push @commit_spec, '-1';
7415                         } else {
7416                                 if ($patch_max > 0) {
7417                                         push @commit_spec, "-$patch_max";
7418                                 }
7419                                 push @commit_spec, "-n";
7420                         }
7421                         push @commit_spec, '--root', $hash;
7422                 }
7423                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7424                         '--encoding=utf8', '--stdout', @commit_spec
7425                         or die_error(500, "Open git-format-patch failed");
7426         } else {
7427                 die_error(400, "Unknown commitdiff format");
7428         }
7429
7430         # non-textual hash id's can be cached
7431         my $expires;
7432         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7433                 $expires = "+1d";
7434         }
7435
7436         # write commit message
7437         if ($format eq 'html') {
7438                 my $refs = git_get_references();
7439                 my $ref = format_ref_marker($refs, $co{'id'});
7440
7441                 git_header_html(undef, $expires);
7442                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7443                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7444                 print "<div class=\"title_text\">\n" .
7445                       "<table class=\"object_header\">\n";
7446                 git_print_authorship_rows(\%co);
7447                 print "</table>".
7448                       "</div>\n";
7449                 print "<div class=\"page_body\">\n";
7450                 if (@{$co{'comment'}} > 1) {
7451                         print "<div class=\"log\">\n";
7452                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7453                         print "</div>\n"; # class="log"
7454                 }
7455
7456         } elsif ($format eq 'plain') {
7457                 my $refs = git_get_references("tags");
7458                 my $tagname = git_get_rev_name_tags($hash);
7459                 my $filename = basename($project) . "-$hash.patch";
7460
7461                 print $cgi->header(
7462                         -type => 'text/plain',
7463                         -charset => 'utf-8',
7464                         -expires => $expires,
7465                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7466                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7467                 print "From: " . to_utf8($co{'author'}) . "\n";
7468                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7469                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7470
7471                 print "X-Git-Tag: $tagname\n" if $tagname;
7472                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7473
7474                 foreach my $line (@{$co{'comment'}}) {
7475                         print to_utf8($line) . "\n";
7476                 }
7477                 print "---\n\n";
7478         } elsif ($format eq 'patch') {
7479                 my $filename = basename($project) . "-$hash.patch";
7480
7481                 print $cgi->header(
7482                         -type => 'text/plain',
7483                         -charset => 'utf-8',
7484                         -expires => $expires,
7485                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7486         }
7487
7488         # write patch
7489         if ($format eq 'html') {
7490                 my $use_parents = !defined $hash_parent ||
7491                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7492                 git_difftree_body(\@difftree, $hash,
7493                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7494                 print "<br/>\n";
7495
7496                 git_patchset_body($fd, $diff_style,
7497                                   \@difftree, $hash,
7498                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7499                 close $fd;
7500                 print "</div>\n"; # class="page_body"
7501                 git_footer_html();
7502
7503         } elsif ($format eq 'plain') {
7504                 local $/ = undef;
7505                 print <$fd>;
7506                 close $fd
7507                         or print "Reading git-diff-tree failed\n";
7508         } elsif ($format eq 'patch') {
7509                 local $/ = undef;
7510                 print <$fd>;
7511                 close $fd
7512                         or print "Reading git-format-patch failed\n";
7513         }
7514 }
7515
7516 sub git_commitdiff_plain {
7517         git_commitdiff(-format => 'plain');
7518 }
7519
7520 # format-patch-style patches
7521 sub git_patch {
7522         git_commitdiff(-format => 'patch', -single => 1);
7523 }
7524
7525 sub git_patches {
7526         git_commitdiff(-format => 'patch');
7527 }
7528
7529 sub git_history {
7530         git_log_generic('history', \&git_history_body,
7531                         $hash_base, $hash_parent_base,
7532                         $file_name, $hash);
7533 }
7534
7535 sub git_search {
7536         $searchtype ||= 'commit';
7537
7538         # check if appropriate features are enabled
7539         gitweb_check_feature('search')
7540                 or die_error(403, "Search is disabled");
7541         if ($searchtype eq 'pickaxe') {
7542                 # pickaxe may take all resources of your box and run for several minutes
7543                 # with every query - so decide by yourself how public you make this feature
7544                 gitweb_check_feature('pickaxe')
7545                         or die_error(403, "Pickaxe search is disabled");
7546         }
7547         if ($searchtype eq 'grep') {
7548                 # grep search might be potentially CPU-intensive, too
7549                 gitweb_check_feature('grep')
7550                         or die_error(403, "Grep search is disabled");
7551         }
7552
7553         if (!defined $searchtext) {
7554                 die_error(400, "Text field is empty");
7555         }
7556         if (!defined $hash) {
7557                 $hash = git_get_head_hash($project);
7558         }
7559         my %co = parse_commit($hash);
7560         if (!%co) {
7561                 die_error(404, "Unknown commit object");
7562         }
7563         if (!defined $page) {
7564                 $page = 0;
7565         }
7566
7567         if ($searchtype eq 'commit' ||
7568             $searchtype eq 'author' ||
7569             $searchtype eq 'committer') {
7570                 git_search_message(%co);
7571         } elsif ($searchtype eq 'pickaxe') {
7572                 git_search_changes(%co);
7573         } elsif ($searchtype eq 'grep') {
7574                 git_search_files(%co);
7575         } else {
7576                 die_error(400, "Unknown search type");
7577         }
7578 }
7579
7580 sub git_search_help {
7581         git_header_html();
7582         git_print_page_nav('','', $hash,$hash,$hash);
7583         print <<EOT;
7584 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7585 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7586 the pattern entered is recognized as the POSIX extended
7587 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7588 insensitive).</p>
7589 <dl>
7590 <dt><b>commit</b></dt>
7591 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7592 EOT
7593         my $have_grep = gitweb_check_feature('grep');
7594         if ($have_grep) {
7595                 print <<EOT;
7596 <dt><b>grep</b></dt>
7597 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7598     a different one) are searched for the given pattern. On large trees, this search can take
7599 a while and put some strain on the server, so please use it with some consideration. Note that
7600 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7601 case-sensitive.</dd>
7602 EOT
7603         }
7604         print <<EOT;
7605 <dt><b>author</b></dt>
7606 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7607 <dt><b>committer</b></dt>
7608 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7609 EOT
7610         my $have_pickaxe = gitweb_check_feature('pickaxe');
7611         if ($have_pickaxe) {
7612                 print <<EOT;
7613 <dt><b>pickaxe</b></dt>
7614 <dd>All commits that caused the string to appear or disappear from any file (changes that
7615 added, removed or "modified" the string) will be listed. This search can take a while and
7616 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7617 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7618 EOT
7619         }
7620         print "</dl>\n";
7621         git_footer_html();
7622 }
7623
7624 sub git_shortlog {
7625         git_log_generic('shortlog', \&git_shortlog_body,
7626                         $hash, $hash_parent);
7627 }
7628
7629 ## ......................................................................
7630 ## feeds (RSS, Atom; OPML)
7631
7632 sub git_feed {
7633         my $format = shift || 'atom';
7634         my $have_blame = gitweb_check_feature('blame');
7635
7636         # Atom: http://www.atomenabled.org/developers/syndication/
7637         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7638         if ($format ne 'rss' && $format ne 'atom') {
7639                 die_error(400, "Unknown web feed format");
7640         }
7641
7642         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7643         my $head = $hash || 'HEAD';
7644         my @commitlist = parse_commits($head, 150, 0, $file_name);
7645
7646         my %latest_commit;
7647         my %latest_date;
7648         my $content_type = "application/$format+xml";
7649         if (defined $cgi->http('HTTP_ACCEPT') &&
7650                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7651                 # browser (feed reader) prefers text/xml
7652                 $content_type = 'text/xml';
7653         }
7654         if (defined($commitlist[0])) {
7655                 %latest_commit = %{$commitlist[0]};
7656                 my $latest_epoch = $latest_commit{'committer_epoch'};
7657                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7658                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7659                 if (defined $if_modified) {
7660                         my $since;
7661                         if (eval { require HTTP::Date; 1; }) {
7662                                 $since = HTTP::Date::str2time($if_modified);
7663                         } elsif (eval { require Time::ParseDate; 1; }) {
7664                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7665                         }
7666                         if (defined $since && $latest_epoch <= $since) {
7667                                 print $cgi->header(
7668                                         -type => $content_type,
7669                                         -charset => 'utf-8',
7670                                         -last_modified => $latest_date{'rfc2822'},
7671                                         -status => '304 Not Modified');
7672                                 return;
7673                         }
7674                 }
7675                 print $cgi->header(
7676                         -type => $content_type,
7677                         -charset => 'utf-8',
7678                         -last_modified => $latest_date{'rfc2822'});
7679         } else {
7680                 print $cgi->header(
7681                         -type => $content_type,
7682                         -charset => 'utf-8');
7683         }
7684
7685         # Optimization: skip generating the body if client asks only
7686         # for Last-Modified date.
7687         return if ($cgi->request_method() eq 'HEAD');
7688
7689         # header variables
7690         my $title = "$site_name - $project/$action";
7691         my $feed_type = 'log';
7692         if (defined $hash) {
7693                 $title .= " - '$hash'";
7694                 $feed_type = 'branch log';
7695                 if (defined $file_name) {
7696                         $title .= " :: $file_name";
7697                         $feed_type = 'history';
7698                 }
7699         } elsif (defined $file_name) {
7700                 $title .= " - $file_name";
7701                 $feed_type = 'history';
7702         }
7703         $title .= " $feed_type";
7704         my $descr = git_get_project_description($project);
7705         if (defined $descr) {
7706                 $descr = esc_html($descr);
7707         } else {
7708                 $descr = "$project " .
7709                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7710                          " feed";
7711         }
7712         my $owner = git_get_project_owner($project);
7713         $owner = esc_html($owner);
7714
7715         #header
7716         my $alt_url;
7717         if (defined $file_name) {
7718                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7719         } elsif (defined $hash) {
7720                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7721         } else {
7722                 $alt_url = href(-full=>1, action=>"summary");
7723         }
7724         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7725         if ($format eq 'rss') {
7726                 print <<XML;
7727 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7728 <channel>
7729 XML
7730                 print "<title>$title</title>\n" .
7731                       "<link>$alt_url</link>\n" .
7732                       "<description>$descr</description>\n" .
7733                       "<language>en</language>\n" .
7734                       # project owner is responsible for 'editorial' content
7735                       "<managingEditor>$owner</managingEditor>\n";
7736                 if (defined $logo || defined $favicon) {
7737                         # prefer the logo to the favicon, since RSS
7738                         # doesn't allow both
7739                         my $img = esc_url($logo || $favicon);
7740                         print "<image>\n" .
7741                               "<url>$img</url>\n" .
7742                               "<title>$title</title>\n" .
7743                               "<link>$alt_url</link>\n" .
7744                               "</image>\n";
7745                 }
7746                 if (%latest_date) {
7747                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7748                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7749                 }
7750                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7751         } elsif ($format eq 'atom') {
7752                 print <<XML;
7753 <feed xmlns="http://www.w3.org/2005/Atom">
7754 XML
7755                 print "<title>$title</title>\n" .
7756                       "<subtitle>$descr</subtitle>\n" .
7757                       '<link rel="alternate" type="text/html" href="' .
7758                       $alt_url . '" />' . "\n" .
7759                       '<link rel="self" type="' . $content_type . '" href="' .
7760                       $cgi->self_url() . '" />' . "\n" .
7761                       "<id>" . href(-full=>1) . "</id>\n" .
7762                       # use project owner for feed author
7763                       "<author><name>$owner</name></author>\n";
7764                 if (defined $favicon) {
7765                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7766                 }
7767                 if (defined $logo) {
7768                         # not twice as wide as tall: 72 x 27 pixels
7769                         print "<logo>" . esc_url($logo) . "</logo>\n";
7770                 }
7771                 if (! %latest_date) {
7772                         # dummy date to keep the feed valid until commits trickle in:
7773                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7774                 } else {
7775                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7776                 }
7777                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7778         }
7779
7780         # contents
7781         for (my $i = 0; $i <= $#commitlist; $i++) {
7782                 my %co = %{$commitlist[$i]};
7783                 my $commit = $co{'id'};
7784                 # we read 150, we always show 30 and the ones more recent than 48 hours
7785                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7786                         last;
7787                 }
7788                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7789
7790                 # get list of changed files
7791                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7792                         $co{'parent'} || "--root",
7793                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7794                         or next;
7795                 my @difftree = map { chomp; $_ } <$fd>;
7796                 close $fd
7797                         or next;
7798
7799                 # print element (entry, item)
7800                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7801                 if ($format eq 'rss') {
7802                         print "<item>\n" .
7803                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7804                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7805                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7806                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7807                               "<link>$co_url</link>\n" .
7808                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7809                               "<content:encoded>" .
7810                               "<![CDATA[\n";
7811                 } elsif ($format eq 'atom') {
7812                         print "<entry>\n" .
7813                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7814                               "<updated>$cd{'iso-8601'}</updated>\n" .
7815                               "<author>\n" .
7816                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7817                         if ($co{'author_email'}) {
7818                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7819                         }
7820                         print "</author>\n" .
7821                               # use committer for contributor
7822                               "<contributor>\n" .
7823                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7824                         if ($co{'committer_email'}) {
7825                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7826                         }
7827                         print "</contributor>\n" .
7828                               "<published>$cd{'iso-8601'}</published>\n" .
7829                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7830                               "<id>$co_url</id>\n" .
7831                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7832                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7833                 }
7834                 my $comment = $co{'comment'};
7835                 print "<pre>\n";
7836                 foreach my $line (@$comment) {
7837                         $line = esc_html($line);
7838                         print "$line\n";
7839                 }
7840                 print "</pre><ul>\n";
7841                 foreach my $difftree_line (@difftree) {
7842                         my %difftree = parse_difftree_raw_line($difftree_line);
7843                         next if !$difftree{'from_id'};
7844
7845                         my $file = $difftree{'file'} || $difftree{'to_file'};
7846
7847                         print "<li>" .
7848                               "[" .
7849                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7850                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7851                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7852                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7853                                       -title => "diff"}, 'D');
7854                         if ($have_blame) {
7855                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7856                                                              file_name=>$file, hash_base=>$commit),
7857                                               -title => "blame"}, 'B');
7858                         }
7859                         # if this is not a feed of a file history
7860                         if (!defined $file_name || $file_name ne $file) {
7861                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7862                                                              file_name=>$file, hash=>$commit),
7863                                               -title => "history"}, 'H');
7864                         }
7865                         $file = esc_path($file);
7866                         print "] ".
7867                               "$file</li>\n";
7868                 }
7869                 if ($format eq 'rss') {
7870                         print "</ul>]]>\n" .
7871                               "</content:encoded>\n" .
7872                               "</item>\n";
7873                 } elsif ($format eq 'atom') {
7874                         print "</ul>\n</div>\n" .
7875                               "</content>\n" .
7876                               "</entry>\n";
7877                 }
7878         }
7879
7880         # end of feed
7881         if ($format eq 'rss') {
7882                 print "</channel>\n</rss>\n";
7883         } elsif ($format eq 'atom') {
7884                 print "</feed>\n";
7885         }
7886 }
7887
7888 sub git_rss {
7889         git_feed('rss');
7890 }
7891
7892 sub git_atom {
7893         git_feed('atom');
7894 }
7895
7896 sub git_opml {
7897         my @list = git_get_projects_list($project_filter, $strict_export);
7898         if (!@list) {
7899                 die_error(404, "No projects found");
7900         }
7901
7902         print $cgi->header(
7903                 -type => 'text/xml',
7904                 -charset => 'utf-8',
7905                 -content_disposition => 'inline; filename="opml.xml"');
7906
7907         my $title = esc_html($site_name);
7908         my $filter = " within subdirectory ";
7909         if (defined $project_filter) {
7910                 $filter .= esc_html($project_filter);
7911         } else {
7912                 $filter = "";
7913         }
7914         print <<XML;
7915 <?xml version="1.0" encoding="utf-8"?>
7916 <opml version="1.0">
7917 <head>
7918   <title>$title OPML Export$filter</title>
7919 </head>
7920 <body>
7921 <outline text="git RSS feeds">
7922 XML
7923
7924         foreach my $pr (@list) {
7925                 my %proj = %$pr;
7926                 my $head = git_get_head_hash($proj{'path'});
7927                 if (!defined $head) {
7928                         next;
7929                 }
7930                 $git_dir = "$projectroot/$proj{'path'}";
7931                 my %co = parse_commit($head);
7932                 if (!%co) {
7933                         next;
7934                 }
7935
7936                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7937                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7938                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7939                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7940         }
7941         print <<XML;
7942 </outline>
7943 </body>
7944 </opml>
7945 XML
7946 }