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                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3860                 if (defined $action) {
3861                         my $action_print = $action ;
3862                         if (defined $opts{-action_extra}) {
3863                                 $action_print = $cgi->a({-href => href(action=>$action)},
3864                                         $action);
3865                         }
3866                         print " / $action_print";
3867                 }
3868                 if (defined $opts{-action_extra}) {
3869                         print " / $opts{-action_extra}";
3870                 }
3871                 print "\n";
3872         } elsif (defined $project_filter) {
3873                 print_nav_breadcrumbs_path(split '/', $project_filter);
3874         }
3875 }
3876
3877 sub print_search_form {
3878         if (!defined $searchtext) {
3879                 $searchtext = "";
3880         }
3881         my $search_hash;
3882         if (defined $hash_base) {
3883                 $search_hash = $hash_base;
3884         } elsif (defined $hash) {
3885                 $search_hash = $hash;
3886         } else {
3887                 $search_hash = "HEAD";
3888         }
3889         my $action = $my_uri;
3890         my $use_pathinfo = gitweb_check_feature('pathinfo');
3891         if ($use_pathinfo) {
3892                 $action .= "/".esc_url($project);
3893         }
3894         print $cgi->startform(-method => "get", -action => $action) .
3895               "<div class=\"search\">\n" .
3896               (!$use_pathinfo &&
3897               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3898               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3899               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3900               $cgi->popup_menu(-name => 'st', -default => 'commit',
3901                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3902               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3903               " search:\n",
3904               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3905               "<span title=\"Extended regular expression\">" .
3906               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3907                              -checked => $search_use_regexp) .
3908               "</span>" .
3909               "</div>" .
3910               $cgi->end_form() . "\n";
3911 }
3912
3913 sub git_header_html {
3914         my $status = shift || "200 OK";
3915         my $expires = shift;
3916         my %opts = @_;
3917
3918         my $title = get_page_title();
3919         my $content_type = get_content_type_html();
3920         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3921                            -status=> $status, -expires => $expires)
3922                 unless ($opts{'-no_http_header'});
3923         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3924         print <<EOF;
3925 <?xml version="1.0" encoding="utf-8"?>
3926 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3927 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3928 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3929 <!-- git core binaries version $git_version -->
3930 <head>
3931 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3932 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3933 <meta name="robots" content="index, nofollow"/>
3934 <title>$title</title>
3935 EOF
3936         # the stylesheet, favicon etc urls won't work correctly with path_info
3937         # unless we set the appropriate base URL
3938         if ($ENV{'PATH_INFO'}) {
3939                 print "<base href=\"".esc_url($base_url)."\" />\n";
3940         }
3941         print_header_links($status);
3942
3943         if (defined $site_html_head_string) {
3944                 print to_utf8($site_html_head_string);
3945         }
3946
3947         print "</head>\n" .
3948               "<body>\n";
3949
3950         if (defined $site_header && -f $site_header) {
3951                 insert_file($site_header);
3952         }
3953
3954         print "<div class=\"page_header\">\n";
3955         if (defined $logo) {
3956                 print $cgi->a({-href => esc_url($logo_url),
3957                                -title => $logo_label},
3958                               $cgi->img({-src => esc_url($logo),
3959                                          -width => 72, -height => 27,
3960                                          -alt => "git",
3961                                          -class => "logo"}));
3962         }
3963         print_nav_breadcrumbs(%opts);
3964         print "</div>\n";
3965
3966         my $have_search = gitweb_check_feature('search');
3967         if (defined $project && $have_search) {
3968                 print_search_form();
3969         }
3970 }
3971
3972 sub git_footer_html {
3973         my $feed_class = 'rss_logo';
3974
3975         print "<div class=\"page_footer\">\n";
3976         if (defined $project) {
3977                 my $descr = git_get_project_description($project);
3978                 if (defined $descr) {
3979                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3980                 }
3981
3982                 my %href_params = get_feed_info();
3983                 if (!%href_params) {
3984                         $feed_class .= ' generic';
3985                 }
3986                 $href_params{'-title'} ||= 'log';
3987
3988                 foreach my $format (qw(RSS Atom)) {
3989                         $href_params{'action'} = lc($format);
3990                         print $cgi->a({-href => href(%href_params),
3991                                       -title => "$href_params{'-title'} $format feed",
3992                                       -class => $feed_class}, $format)."\n";
3993                 }
3994
3995         } else {
3996                 print $cgi->a({-href => href(project=>undef, action=>"opml",
3997                                              project_filter => $project_filter),
3998                               -class => $feed_class}, "OPML") . " ";
3999                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4000                                              project_filter => $project_filter),
4001                               -class => $feed_class}, "TXT") . "\n";
4002         }
4003         print "</div>\n"; # class="page_footer"
4004
4005         if (defined $t0 && gitweb_check_feature('timed')) {
4006                 print "<div id=\"generating_info\">\n";
4007                 print 'This page took '.
4008                       '<span id="generating_time" class="time_span">'.
4009                       tv_interval($t0, [ gettimeofday() ]).
4010                       ' seconds </span>'.
4011                       ' and '.
4012                       '<span id="generating_cmd">'.
4013                       $number_of_git_cmds.
4014                       '</span> git commands '.
4015                       " to generate.\n";
4016                 print "</div>\n"; # class="page_footer"
4017         }
4018
4019         if (defined $site_footer && -f $site_footer) {
4020                 insert_file($site_footer);
4021         }
4022
4023         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4024         if (defined $action &&
4025             $action eq 'blame_incremental') {
4026                 print qq!<script type="text/javascript">\n!.
4027                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4028                       qq!           "!. href() .qq!");\n!.
4029                       qq!</script>\n!;
4030         } else {
4031                 my ($jstimezone, $tz_cookie, $datetime_class) =
4032                         gitweb_get_feature('javascript-timezone');
4033
4034                 print qq!<script type="text/javascript">\n!.
4035                       qq!window.onload = function () {\n!;
4036                 if (gitweb_check_feature('javascript-actions')) {
4037                         print qq!       fixLinks();\n!;
4038                 }
4039                 if ($jstimezone && $tz_cookie && $datetime_class) {
4040                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4041                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4042                 }
4043                 print qq!};\n!.
4044                       qq!</script>\n!;
4045         }
4046
4047         print "</body>\n" .
4048               "</html>";
4049 }
4050
4051 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4052 # Example: die_error(404, 'Hash not found')
4053 # By convention, use the following status codes (as defined in RFC 2616):
4054 # 400: Invalid or missing CGI parameters, or
4055 #      requested object exists but has wrong type.
4056 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4057 #      this server or project.
4058 # 404: Requested object/revision/project doesn't exist.
4059 # 500: The server isn't configured properly, or
4060 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4061 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4062 # 503: The server is currently unavailable (because it is overloaded,
4063 #      or down for maintenance).  Generally, this is a temporary state.
4064 sub die_error {
4065         my $status = shift || 500;
4066         my $error = esc_html(shift) || "Internal Server Error";
4067         my $extra = shift;
4068         my %opts = @_;
4069
4070         my %http_responses = (
4071                 400 => '400 Bad Request',
4072                 403 => '403 Forbidden',
4073                 404 => '404 Not Found',
4074                 500 => '500 Internal Server Error',
4075                 503 => '503 Service Unavailable',
4076         );
4077         git_header_html($http_responses{$status}, undef, %opts);
4078         print <<EOF;
4079 <div class="page_body">
4080 <br /><br />
4081 $status - $error
4082 <br />
4083 EOF
4084         if (defined $extra) {
4085                 print "<hr />\n" .
4086                       "$extra\n";
4087         }
4088         print "</div>\n";
4089
4090         git_footer_html();
4091         goto DONE_GITWEB
4092                 unless ($opts{'-error_handler'});
4093 }
4094
4095 ## ----------------------------------------------------------------------
4096 ## functions printing or outputting HTML: navigation
4097
4098 sub git_print_page_nav {
4099         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4100         $extra = '' if !defined $extra; # pager or formats
4101
4102         my @navs = qw(summary shortlog log commit commitdiff tree);
4103         if ($suppress) {
4104                 @navs = grep { $_ ne $suppress } @navs;
4105         }
4106
4107         my %arg = map { $_ => {action=>$_} } @navs;
4108         if (defined $head) {
4109                 for (qw(commit commitdiff)) {
4110                         $arg{$_}{'hash'} = $head;
4111                 }
4112                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4113                         for (qw(shortlog log)) {
4114                                 $arg{$_}{'hash'} = $head;
4115                         }
4116                 }
4117         }
4118
4119         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4120         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4121
4122         my @actions = gitweb_get_feature('actions');
4123         my %repl = (
4124                 '%' => '%',
4125                 'n' => $project,         # project name
4126                 'f' => $git_dir,         # project path within filesystem
4127                 'h' => $treehead || '',  # current hash ('h' parameter)
4128                 'b' => $treebase || '',  # hash base ('hb' parameter)
4129         );
4130         while (@actions) {
4131                 my ($label, $link, $pos) = splice(@actions,0,3);
4132                 # insert
4133                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4134                 # munch munch
4135                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4136                 $arg{$label}{'_href'} = $link;
4137         }
4138
4139         print "<div class=\"page_nav\">\n" .
4140                 (join " | ",
4141                  map { $_ eq $current ?
4142                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4143                  } @navs);
4144         print "<br/>\n$extra<br/>\n" .
4145               "</div>\n";
4146 }
4147
4148 # returns a submenu for the nagivation of the refs views (tags, heads,
4149 # remotes) with the current view disabled and the remotes view only
4150 # available if the feature is enabled
4151 sub format_ref_views {
4152         my ($current) = @_;
4153         my @ref_views = qw{tags heads};
4154         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4155         return join " | ", map {
4156                 $_ eq $current ? $_ :
4157                 $cgi->a({-href => href(action=>$_)}, $_)
4158         } @ref_views
4159 }
4160
4161 sub format_paging_nav {
4162         my ($action, $page, $has_next_link) = @_;
4163         my $paging_nav;
4164
4165
4166         if ($page > 0) {
4167                 $paging_nav .=
4168                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4169                         " &sdot; " .
4170                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4171                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4172         } else {
4173                 $paging_nav .= "first &sdot; prev";
4174         }
4175
4176         if ($has_next_link) {
4177                 $paging_nav .= " &sdot; " .
4178                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4179                                  -accesskey => "n", -title => "Alt-n"}, "next");
4180         } else {
4181                 $paging_nav .= " &sdot; next";
4182         }
4183
4184         return $paging_nav;
4185 }
4186
4187 ## ......................................................................
4188 ## functions printing or outputting HTML: div
4189
4190 sub git_print_header_div {
4191         my ($action, $title, $hash, $hash_base) = @_;
4192         my %args = ();
4193
4194         $args{'action'} = $action;
4195         $args{'hash'} = $hash if $hash;
4196         $args{'hash_base'} = $hash_base if $hash_base;
4197
4198         print "<div class=\"header\">\n" .
4199               $cgi->a({-href => href(%args), -class => "title"},
4200               $title ? $title : $action) .
4201               "\n</div>\n";
4202 }
4203
4204 sub format_repo_url {
4205         my ($name, $url) = @_;
4206         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4207 }
4208
4209 # Group output by placing it in a DIV element and adding a header.
4210 # Options for start_div() can be provided by passing a hash reference as the
4211 # first parameter to the function.
4212 # Options to git_print_header_div() can be provided by passing an array
4213 # reference. This must follow the options to start_div if they are present.
4214 # The content can be a scalar, which is output as-is, a scalar reference, which
4215 # is output after html escaping, an IO handle passed either as *handle or
4216 # *handle{IO}, or a function reference. In the latter case all following
4217 # parameters will be taken as argument to the content function call.
4218 sub git_print_section {
4219         my ($div_args, $header_args, $content);
4220         my $arg = shift;
4221         if (ref($arg) eq 'HASH') {
4222                 $div_args = $arg;
4223                 $arg = shift;
4224         }
4225         if (ref($arg) eq 'ARRAY') {
4226                 $header_args = $arg;
4227                 $arg = shift;
4228         }
4229         $content = $arg;
4230
4231         print $cgi->start_div($div_args);
4232         git_print_header_div(@$header_args);
4233
4234         if (ref($content) eq 'CODE') {
4235                 $content->(@_);
4236         } elsif (ref($content) eq 'SCALAR') {
4237                 print esc_html($$content);
4238         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4239                 print <$content>;
4240         } elsif (!ref($content) && defined($content)) {
4241                 print $content;
4242         }
4243
4244         print $cgi->end_div;
4245 }
4246
4247 sub format_timestamp_html {
4248         my $date = shift;
4249         my $strtime = $date->{'rfc2822'};
4250
4251         my (undef, undef, $datetime_class) =
4252                 gitweb_get_feature('javascript-timezone');
4253         if ($datetime_class) {
4254                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4255         }
4256
4257         my $localtime_format = '(%02d:%02d %s)';
4258         if ($date->{'hour_local'} < 6) {
4259                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4260         }
4261         $strtime .= ' ' .
4262                     sprintf($localtime_format,
4263                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4264
4265         return $strtime;
4266 }
4267
4268 # Outputs the author name and date in long form
4269 sub git_print_authorship {
4270         my $co = shift;
4271         my %opts = @_;
4272         my $tag = $opts{-tag} || 'div';
4273         my $author = $co->{'author_name'};
4274
4275         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4276         print "<$tag class=\"author_date\">" .
4277               format_search_author($author, "author", esc_html($author)) .
4278               " [".format_timestamp_html(\%ad)."]".
4279               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4280               "</$tag>\n";
4281 }
4282
4283 # Outputs table rows containing the full author or committer information,
4284 # in the format expected for 'commit' view (& similar).
4285 # Parameters are a commit hash reference, followed by the list of people
4286 # to output information for. If the list is empty it defaults to both
4287 # author and committer.
4288 sub git_print_authorship_rows {
4289         my $co = shift;
4290         # too bad we can't use @people = @_ || ('author', 'committer')
4291         my @people = @_;
4292         @people = ('author', 'committer') unless @people;
4293         foreach my $who (@people) {
4294                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4295                 print "<tr><td>$who</td><td>" .
4296                       format_search_author($co->{"${who}_name"}, $who,
4297                                            esc_html($co->{"${who}_name"})) . " " .
4298                       format_search_author($co->{"${who}_email"}, $who,
4299                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4300                       "</td><td rowspan=\"2\">" .
4301                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4302                       "</td></tr>\n" .
4303                       "<tr>" .
4304                       "<td></td><td>" .
4305                       format_timestamp_html(\%wd) .
4306                       "</td>" .
4307                       "</tr>\n";
4308         }
4309 }
4310
4311 sub git_print_page_path {
4312         my $name = shift;
4313         my $type = shift;
4314         my $hb = shift;
4315
4316
4317         print "<div class=\"page_path\">";
4318         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4319                       -title => 'tree root'}, to_utf8("[$project]"));
4320         print " / ";
4321         if (defined $name) {
4322                 my @dirname = split '/', $name;
4323                 my $basename = pop @dirname;
4324                 my $fullname = '';
4325
4326                 foreach my $dir (@dirname) {
4327                         $fullname .= ($fullname ? '/' : '') . $dir;
4328                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4329                                                      hash_base=>$hb),
4330                                       -title => $fullname}, esc_path($dir));
4331                         print " / ";
4332                 }
4333                 if (defined $type && $type eq 'blob') {
4334                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4335                                                      hash_base=>$hb),
4336                                       -title => $name}, esc_path($basename));
4337                 } elsif (defined $type && $type eq 'tree') {
4338                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4339                                                      hash_base=>$hb),
4340                                       -title => $name}, esc_path($basename));
4341                         print " / ";
4342                 } else {
4343                         print esc_path($basename);
4344                 }
4345         }
4346         print "<br/></div>\n";
4347 }
4348
4349 sub git_print_log {
4350         my $log = shift;
4351         my %opts = @_;
4352
4353         if ($opts{'-remove_title'}) {
4354                 # remove title, i.e. first line of log
4355                 shift @$log;
4356         }
4357         # remove leading empty lines
4358         while (defined $log->[0] && $log->[0] eq "") {
4359                 shift @$log;
4360         }
4361
4362         # print log
4363         my $signoff = 0;
4364         my $empty = 0;
4365         foreach my $line (@$log) {
4366                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4367                         $signoff = 1;
4368                         $empty = 0;
4369                         if (! $opts{'-remove_signoff'}) {
4370                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4371                                 next;
4372                         } else {
4373                                 # remove signoff lines
4374                                 next;
4375                         }
4376                 } else {
4377                         $signoff = 0;
4378                 }
4379
4380                 # print only one empty line
4381                 # do not print empty line after signoff
4382                 if ($line eq "") {
4383                         next if ($empty || $signoff);
4384                         $empty = 1;
4385                 } else {
4386                         $empty = 0;
4387                 }
4388
4389                 print format_log_line_html($line) . "<br/>\n";
4390         }
4391
4392         if ($opts{'-final_empty_line'}) {
4393                 # end with single empty line
4394                 print "<br/>\n" unless $empty;
4395         }
4396 }
4397
4398 # return link target (what link points to)
4399 sub git_get_link_target {
4400         my $hash = shift;
4401         my $link_target;
4402
4403         # read link
4404         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4405                 or return;
4406         {
4407                 local $/ = undef;
4408                 $link_target = <$fd>;
4409         }
4410         close $fd
4411                 or return;
4412
4413         return $link_target;
4414 }
4415
4416 # given link target, and the directory (basedir) the link is in,
4417 # return target of link relative to top directory (top tree);
4418 # return undef if it is not possible (including absolute links).
4419 sub normalize_link_target {
4420         my ($link_target, $basedir) = @_;
4421
4422         # absolute symlinks (beginning with '/') cannot be normalized
4423         return if (substr($link_target, 0, 1) eq '/');
4424
4425         # normalize link target to path from top (root) tree (dir)
4426         my $path;
4427         if ($basedir) {
4428                 $path = $basedir . '/' . $link_target;
4429         } else {
4430                 # we are in top (root) tree (dir)
4431                 $path = $link_target;
4432         }
4433
4434         # remove //, /./, and /../
4435         my @path_parts;
4436         foreach my $part (split('/', $path)) {
4437                 # discard '.' and ''
4438                 next if (!$part || $part eq '.');
4439                 # handle '..'
4440                 if ($part eq '..') {
4441                         if (@path_parts) {
4442                                 pop @path_parts;
4443                         } else {
4444                                 # link leads outside repository (outside top dir)
4445                                 return;
4446                         }
4447                 } else {
4448                         push @path_parts, $part;
4449                 }
4450         }
4451         $path = join('/', @path_parts);
4452
4453         return $path;
4454 }
4455
4456 # print tree entry (row of git_tree), but without encompassing <tr> element
4457 sub git_print_tree_entry {
4458         my ($t, $basedir, $hash_base, $have_blame) = @_;
4459
4460         my %base_key = ();
4461         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4462
4463         # The format of a table row is: mode list link.  Where mode is
4464         # the mode of the entry, list is the name of the entry, an href,
4465         # and link is the action links of the entry.
4466
4467         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4468         if (exists $t->{'size'}) {
4469                 print "<td class=\"size\">$t->{'size'}</td>\n";
4470         }
4471         if ($t->{'type'} eq "blob") {
4472                 print "<td class=\"list\">" .
4473                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4474                                                file_name=>"$basedir$t->{'name'}", %base_key),
4475                                 -class => "list"}, esc_path($t->{'name'}));
4476                 if (S_ISLNK(oct $t->{'mode'})) {
4477                         my $link_target = git_get_link_target($t->{'hash'});
4478                         if ($link_target) {
4479                                 my $norm_target = normalize_link_target($link_target, $basedir);
4480                                 if (defined $norm_target) {
4481                                         print " -> " .
4482                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4483                                                                      file_name=>$norm_target),
4484                                                        -title => $norm_target}, esc_path($link_target));
4485                                 } else {
4486                                         print " -> " . esc_path($link_target);
4487                                 }
4488                         }
4489                 }
4490                 print "</td>\n";
4491                 print "<td class=\"link\">";
4492                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4493                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4494                               "blob");
4495                 if ($have_blame) {
4496                         print " | " .
4497                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4498                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4499                                       "blame");
4500                 }
4501                 if (defined $hash_base) {
4502                         print " | " .
4503                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4504                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4505                                       "history");
4506                 }
4507                 print " | " .
4508                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4509                                                file_name=>"$basedir$t->{'name'}")},
4510                                 "raw");
4511                 print "</td>\n";
4512
4513         } elsif ($t->{'type'} eq "tree") {
4514                 print "<td class=\"list\">";
4515                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4516                                              file_name=>"$basedir$t->{'name'}",
4517                                              %base_key)},
4518                               esc_path($t->{'name'}));
4519                 print "</td>\n";
4520                 print "<td class=\"link\">";
4521                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4522                                              file_name=>"$basedir$t->{'name'}",
4523                                              %base_key)},
4524                               "tree");
4525                 if (defined $hash_base) {
4526                         print " | " .
4527                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4528                                                      file_name=>"$basedir$t->{'name'}")},
4529                                       "history");
4530                 }
4531                 print "</td>\n";
4532         } else {
4533                 # unknown object: we can only present history for it
4534                 # (this includes 'commit' object, i.e. submodule support)
4535                 print "<td class=\"list\">" .
4536                       esc_path($t->{'name'}) .
4537                       "</td>\n";
4538                 print "<td class=\"link\">";
4539                 if (defined $hash_base) {
4540                         print $cgi->a({-href => href(action=>"history",
4541                                                      hash_base=>$hash_base,
4542                                                      file_name=>"$basedir$t->{'name'}")},
4543                                       "history");
4544                 }
4545                 print "</td>\n";
4546         }
4547 }
4548
4549 ## ......................................................................
4550 ## functions printing large fragments of HTML
4551
4552 # get pre-image filenames for merge (combined) diff
4553 sub fill_from_file_info {
4554         my ($diff, @parents) = @_;
4555
4556         $diff->{'from_file'} = [ ];
4557         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4558         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4559                 if ($diff->{'status'}[$i] eq 'R' ||
4560                     $diff->{'status'}[$i] eq 'C') {
4561                         $diff->{'from_file'}[$i] =
4562                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4563                 }
4564         }
4565
4566         return $diff;
4567 }
4568
4569 # is current raw difftree line of file deletion
4570 sub is_deleted {
4571         my $diffinfo = shift;
4572
4573         return $diffinfo->{'to_id'} eq ('0' x 40);
4574 }
4575
4576 # does patch correspond to [previous] difftree raw line
4577 # $diffinfo  - hashref of parsed raw diff format
4578 # $patchinfo - hashref of parsed patch diff format
4579 #              (the same keys as in $diffinfo)
4580 sub is_patch_split {
4581         my ($diffinfo, $patchinfo) = @_;
4582
4583         return defined $diffinfo && defined $patchinfo
4584                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4585 }
4586
4587
4588 sub git_difftree_body {
4589         my ($difftree, $hash, @parents) = @_;
4590         my ($parent) = $parents[0];
4591         my $have_blame = gitweb_check_feature('blame');
4592         print "<div class=\"list_head\">\n";
4593         if ($#{$difftree} > 10) {
4594                 print(($#{$difftree} + 1) . " files changed:\n");
4595         }
4596         print "</div>\n";
4597
4598         print "<table class=\"" .
4599               (@parents > 1 ? "combined " : "") .
4600               "diff_tree\">\n";
4601
4602         # header only for combined diff in 'commitdiff' view
4603         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4604         if ($has_header) {
4605                 # table header
4606                 print "<thead><tr>\n" .
4607                        "<th></th><th></th>\n"; # filename, patchN link
4608                 for (my $i = 0; $i < @parents; $i++) {
4609                         my $par = $parents[$i];
4610                         print "<th>" .
4611                               $cgi->a({-href => href(action=>"commitdiff",
4612                                                      hash=>$hash, hash_parent=>$par),
4613                                        -title => 'commitdiff to parent number ' .
4614                                                   ($i+1) . ': ' . substr($par,0,7)},
4615                                       $i+1) .
4616                               "&nbsp;</th>\n";
4617                 }
4618                 print "</tr></thead>\n<tbody>\n";
4619         }
4620
4621         my $alternate = 1;
4622         my $patchno = 0;
4623         foreach my $line (@{$difftree}) {
4624                 my $diff = parsed_difftree_line($line);
4625
4626                 if ($alternate) {
4627                         print "<tr class=\"dark\">\n";
4628                 } else {
4629                         print "<tr class=\"light\">\n";
4630                 }
4631                 $alternate ^= 1;
4632
4633                 if (exists $diff->{'nparents'}) { # combined diff
4634
4635                         fill_from_file_info($diff, @parents)
4636                                 unless exists $diff->{'from_file'};
4637
4638                         if (!is_deleted($diff)) {
4639                                 # file exists in the result (child) commit
4640                                 print "<td>" .
4641                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4642                                                              file_name=>$diff->{'to_file'},
4643                                                              hash_base=>$hash),
4644                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4645                                       "</td>\n";
4646                         } else {
4647                                 print "<td>" .
4648                                       esc_path($diff->{'to_file'}) .
4649                                       "</td>\n";
4650                         }
4651
4652                         if ($action eq 'commitdiff') {
4653                                 # link to patch
4654                                 $patchno++;
4655                                 print "<td class=\"link\">" .
4656                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4657                                               "patch") .
4658                                       " | " .
4659                                       "</td>\n";
4660                         }
4661
4662                         my $has_history = 0;
4663                         my $not_deleted = 0;
4664                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4665                                 my $hash_parent = $parents[$i];
4666                                 my $from_hash = $diff->{'from_id'}[$i];
4667                                 my $from_path = $diff->{'from_file'}[$i];
4668                                 my $status = $diff->{'status'}[$i];
4669
4670                                 $has_history ||= ($status ne 'A');
4671                                 $not_deleted ||= ($status ne 'D');
4672
4673                                 if ($status eq 'A') {
4674                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4675                                 } elsif ($status eq 'D') {
4676                                         print "<td class=\"link\">" .
4677                                               $cgi->a({-href => href(action=>"blob",
4678                                                                      hash_base=>$hash,
4679                                                                      hash=>$from_hash,
4680                                                                      file_name=>$from_path)},
4681                                                       "blob" . ($i+1)) .
4682                                               " | </td>\n";
4683                                 } else {
4684                                         if ($diff->{'to_id'} eq $from_hash) {
4685                                                 print "<td class=\"link nochange\">";
4686                                         } else {
4687                                                 print "<td class=\"link\">";
4688                                         }
4689                                         print $cgi->a({-href => href(action=>"blobdiff",
4690                                                                      hash=>$diff->{'to_id'},
4691                                                                      hash_parent=>$from_hash,
4692                                                                      hash_base=>$hash,
4693                                                                      hash_parent_base=>$hash_parent,
4694                                                                      file_name=>$diff->{'to_file'},
4695                                                                      file_parent=>$from_path)},
4696                                                       "diff" . ($i+1)) .
4697                                               " | </td>\n";
4698                                 }
4699                         }
4700
4701                         print "<td class=\"link\">";
4702                         if ($not_deleted) {
4703                                 print $cgi->a({-href => href(action=>"blob",
4704                                                              hash=>$diff->{'to_id'},
4705                                                              file_name=>$diff->{'to_file'},
4706                                                              hash_base=>$hash)},
4707                                               "blob");
4708                                 print " | " if ($has_history);
4709                         }
4710                         if ($has_history) {
4711                                 print $cgi->a({-href => href(action=>"history",
4712                                                              file_name=>$diff->{'to_file'},
4713                                                              hash_base=>$hash)},
4714                                               "history");
4715                         }
4716                         print "</td>\n";
4717
4718                         print "</tr>\n";
4719                         next; # instead of 'else' clause, to avoid extra indent
4720                 }
4721                 # else ordinary diff
4722
4723                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4724                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4725                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4726                         $to_mode_oct = oct $diff->{'to_mode'};
4727                         if (S_ISREG($to_mode_oct)) { # only for regular file
4728                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4729                         }
4730                         $to_file_type = file_type($diff->{'to_mode'});
4731                 }
4732                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4733                         $from_mode_oct = oct $diff->{'from_mode'};
4734                         if (S_ISREG($from_mode_oct)) { # only for regular file
4735                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4736                         }
4737                         $from_file_type = file_type($diff->{'from_mode'});
4738                 }
4739
4740                 if ($diff->{'status'} eq "A") { # created
4741                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4742                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4743                         $mode_chng   .= "]</span>";
4744                         print "<td>";
4745                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4746                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4747                                       -class => "list"}, esc_path($diff->{'file'}));
4748                         print "</td>\n";
4749                         print "<td>$mode_chng</td>\n";
4750                         print "<td class=\"link\">";
4751                         if ($action eq 'commitdiff') {
4752                                 # link to patch
4753                                 $patchno++;
4754                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4755                                               "patch") .
4756                                       " | ";
4757                         }
4758                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4759                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4760                                       "blob");
4761                         print "</td>\n";
4762
4763                 } elsif ($diff->{'status'} eq "D") { # deleted
4764                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4765                         print "<td>";
4766                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4767                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4768                                        -class => "list"}, esc_path($diff->{'file'}));
4769                         print "</td>\n";
4770                         print "<td>$mode_chng</td>\n";
4771                         print "<td class=\"link\">";
4772                         if ($action eq 'commitdiff') {
4773                                 # link to patch
4774                                 $patchno++;
4775                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4776                                               "patch") .
4777                                       " | ";
4778                         }
4779                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4780                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4781                                       "blob") . " | ";
4782                         if ($have_blame) {
4783                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4784                                                              file_name=>$diff->{'file'})},
4785                                               "blame") . " | ";
4786                         }
4787                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4788                                                      file_name=>$diff->{'file'})},
4789                                       "history");
4790                         print "</td>\n";
4791
4792                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4793                         my $mode_chnge = "";
4794                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4795                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4796                                 if ($from_file_type ne $to_file_type) {
4797                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4798                                 }
4799                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4800                                         if ($from_mode_str && $to_mode_str) {
4801                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4802                                         } elsif ($to_mode_str) {
4803                                                 $mode_chnge .= " mode: $to_mode_str";
4804                                         }
4805                                 }
4806                                 $mode_chnge .= "]</span>\n";
4807                         }
4808                         print "<td>";
4809                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4810                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4811                                       -class => "list"}, esc_path($diff->{'file'}));
4812                         print "</td>\n";
4813                         print "<td>$mode_chnge</td>\n";
4814                         print "<td class=\"link\">";
4815                         if ($action eq 'commitdiff') {
4816                                 # link to patch
4817                                 $patchno++;
4818                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4819                                               "patch") .
4820                                       " | ";
4821                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4822                                 # "commit" view and modified file (not onlu mode changed)
4823                                 print $cgi->a({-href => href(action=>"blobdiff",
4824                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4825                                                              hash_base=>$hash, hash_parent_base=>$parent,
4826                                                              file_name=>$diff->{'file'})},
4827                                               "diff") .
4828                                       " | ";
4829                         }
4830                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4831                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4832                                        "blob") . " | ";
4833                         if ($have_blame) {
4834                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4835                                                              file_name=>$diff->{'file'})},
4836                                               "blame") . " | ";
4837                         }
4838                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4839                                                      file_name=>$diff->{'file'})},
4840                                       "history");
4841                         print "</td>\n";
4842
4843                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4844                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4845                         my $nstatus = $status_name{$diff->{'status'}};
4846                         my $mode_chng = "";
4847                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4848                                 # mode also for directories, so we cannot use $to_mode_str
4849                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4850                         }
4851                         print "<td>" .
4852                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4853                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4854                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4855                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4856                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4857                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4858                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4859                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4860                               "<td class=\"link\">";
4861                         if ($action eq 'commitdiff') {
4862                                 # link to patch
4863                                 $patchno++;
4864                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4865                                               "patch") .
4866                                       " | ";
4867                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4868                                 # "commit" view and modified file (not only pure rename or copy)
4869                                 print $cgi->a({-href => href(action=>"blobdiff",
4870                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4871                                                              hash_base=>$hash, hash_parent_base=>$parent,
4872                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4873                                               "diff") .
4874                                       " | ";
4875                         }
4876                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4877                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4878                                       "blob") . " | ";
4879                         if ($have_blame) {
4880                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4881                                                              file_name=>$diff->{'to_file'})},
4882                                               "blame") . " | ";
4883                         }
4884                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4885                                                     file_name=>$diff->{'to_file'})},
4886                                       "history");
4887                         print "</td>\n";
4888
4889                 } # we should not encounter Unmerged (U) or Unknown (X) status
4890                 print "</tr>\n";
4891         }
4892         print "</tbody>" if $has_header;
4893         print "</table>\n";
4894 }
4895
4896 sub print_sidebyside_diff_chunk {
4897         my @chunk = @_;
4898         my (@ctx, @rem, @add);
4899
4900         return unless @chunk;
4901
4902         # incomplete last line might be among removed or added lines,
4903         # or both, or among context lines: find which
4904         for (my $i = 1; $i < @chunk; $i++) {
4905                 if ($chunk[$i][0] eq 'incomplete') {
4906                         $chunk[$i][0] = $chunk[$i-1][0];
4907                 }
4908         }
4909
4910         # guardian
4911         push @chunk, ["", ""];
4912
4913         foreach my $line_info (@chunk) {
4914                 my ($class, $line) = @$line_info;
4915
4916                 # print chunk headers
4917                 if ($class && $class eq 'chunk_header') {
4918                         print $line;
4919                         next;
4920                 }
4921
4922                 ## print from accumulator when type of class of lines change
4923                 # empty contents block on start rem/add block, or end of chunk
4924                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4925                         print join '',
4926                                 '<div class="chunk_block ctx">',
4927                                         '<div class="old">',
4928                                         @ctx,
4929                                         '</div>',
4930                                         '<div class="new">',
4931                                         @ctx,
4932                                         '</div>',
4933                                 '</div>';
4934                         @ctx = ();
4935                 }
4936                 # empty add/rem block on start context block, or end of chunk
4937                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4938                         if (!@add) {
4939                                 # pure removal
4940                                 print join '',
4941                                         '<div class="chunk_block rem">',
4942                                                 '<div class="old">',
4943                                                 @rem,
4944                                                 '</div>',
4945                                         '</div>';
4946                         } elsif (!@rem) {
4947                                 # pure addition
4948                                 print join '',
4949                                         '<div class="chunk_block add">',
4950                                                 '<div class="new">',
4951                                                 @add,
4952                                                 '</div>',
4953                                         '</div>';
4954                         } else {
4955                                 # assume that it is change
4956                                 print join '',
4957                                         '<div class="chunk_block chg">',
4958                                                 '<div class="old">',
4959                                                 @rem,
4960                                                 '</div>',
4961                                                 '<div class="new">',
4962                                                 @add,
4963                                                 '</div>',
4964                                         '</div>';
4965                         }
4966                         @rem = @add = ();
4967                 }
4968
4969                 ## adding lines to accumulator
4970                 # guardian value
4971                 last unless $line;
4972                 # rem, add or change
4973                 if ($class eq 'rem') {
4974                         push @rem, $line;
4975                 } elsif ($class eq 'add') {
4976                         push @add, $line;
4977                 }
4978                 # context line
4979                 if ($class eq 'ctx') {
4980                         push @ctx, $line;
4981                 }
4982         }
4983 }
4984
4985 sub git_patchset_body {
4986         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4987         my ($hash_parent) = $hash_parents[0];
4988
4989         my $is_combined = (@hash_parents > 1);
4990         my $patch_idx = 0;
4991         my $patch_number = 0;
4992         my $patch_line;
4993         my $diffinfo;
4994         my $to_name;
4995         my (%from, %to);
4996         my @chunk; # for side-by-side diff
4997
4998         print "<div class=\"patchset\">\n";
4999
5000         # skip to first patch
5001         while ($patch_line = <$fd>) {
5002                 chomp $patch_line;
5003
5004                 last if ($patch_line =~ m/^diff /);
5005         }
5006
5007  PATCH:
5008         while ($patch_line) {
5009
5010                 # parse "git diff" header line
5011                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5012                         # $1 is from_name, which we do not use
5013                         $to_name = unquote($2);
5014                         $to_name =~ s!^b/!!;
5015                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5016                         # $1 is 'cc' or 'combined', which we do not use
5017                         $to_name = unquote($2);
5018                 } else {
5019                         $to_name = undef;
5020                 }
5021
5022                 # check if current patch belong to current raw line
5023                 # and parse raw git-diff line if needed
5024                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5025                         # this is continuation of a split patch
5026                         print "<div class=\"patch cont\">\n";
5027                 } else {
5028                         # advance raw git-diff output if needed
5029                         $patch_idx++ if defined $diffinfo;
5030
5031                         # read and prepare patch information
5032                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5033
5034                         # compact combined diff output can have some patches skipped
5035                         # find which patch (using pathname of result) we are at now;
5036                         if ($is_combined) {
5037                                 while ($to_name ne $diffinfo->{'to_file'}) {
5038                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5039                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5040                                               "</div>\n";  # class="patch"
5041
5042                                         $patch_idx++;
5043                                         $patch_number++;
5044
5045                                         last if $patch_idx > $#$difftree;
5046                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5047                                 }
5048                         }
5049
5050                         # modifies %from, %to hashes
5051                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5052
5053                         # this is first patch for raw difftree line with $patch_idx index
5054                         # we index @$difftree array from 0, but number patches from 1
5055                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5056                 }
5057
5058                 # git diff header
5059                 #assert($patch_line =~ m/^diff /) if DEBUG;
5060                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5061                 $patch_number++;
5062                 # print "git diff" header
5063                 print format_git_diff_header_line($patch_line, $diffinfo,
5064                                                   \%from, \%to);
5065
5066                 # print extended diff header
5067                 print "<div class=\"diff extended_header\">\n";
5068         EXTENDED_HEADER:
5069                 while ($patch_line = <$fd>) {
5070                         chomp $patch_line;
5071
5072                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5073
5074                         print format_extended_diff_header_line($patch_line, $diffinfo,
5075                                                                \%from, \%to);
5076                 }
5077                 print "</div>\n"; # class="diff extended_header"
5078
5079                 # from-file/to-file diff header
5080                 if (! $patch_line) {
5081                         print "</div>\n"; # class="patch"
5082                         last PATCH;
5083                 }
5084                 next PATCH if ($patch_line =~ m/^diff /);
5085                 #assert($patch_line =~ m/^---/) if DEBUG;
5086
5087                 my $last_patch_line = $patch_line;
5088                 $patch_line = <$fd>;
5089                 chomp $patch_line;
5090                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5091
5092                 print format_diff_from_to_header($last_patch_line, $patch_line,
5093                                                  $diffinfo, \%from, \%to,
5094                                                  @hash_parents);
5095
5096                 # the patch itself
5097         LINE:
5098                 while ($patch_line = <$fd>) {
5099                         chomp $patch_line;
5100
5101                         next PATCH if ($patch_line =~ m/^diff /);
5102
5103                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5104                         my $diff_classes = "diff";
5105                         $diff_classes .= " $class" if ($class);
5106                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5107
5108                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5109                                 if ($class eq 'chunk_header') {
5110                                         print_sidebyside_diff_chunk(@chunk);
5111                                         @chunk = ( [ $class, $line ] );
5112                                 } else {
5113                                         push @chunk, [ $class, $line ];
5114                                 }
5115                         } else {
5116                                 # default 'inline' style and unknown styles
5117                                 print $line;
5118                         }
5119                 }
5120
5121         } continue {
5122                 if (@chunk) {
5123                         print_sidebyside_diff_chunk(@chunk);
5124                         @chunk = ();
5125                 }
5126                 print "</div>\n"; # class="patch"
5127         }
5128
5129         # for compact combined (--cc) format, with chunk and patch simplification
5130         # the patchset might be empty, but there might be unprocessed raw lines
5131         for (++$patch_idx if $patch_number > 0;
5132              $patch_idx < @$difftree;
5133              ++$patch_idx) {
5134                 # read and prepare patch information
5135                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5136
5137                 # generate anchor for "patch" links in difftree / whatchanged part
5138                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5139                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5140                       "</div>\n";  # class="patch"
5141
5142                 $patch_number++;
5143         }
5144
5145         if ($patch_number == 0) {
5146                 if (@hash_parents > 1) {
5147                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5148                 } else {
5149                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5150                 }
5151         }
5152
5153         print "</div>\n"; # class="patchset"
5154 }
5155
5156 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5157
5158 # fills project list info (age, description, owner, category, forks)
5159 # for each project in the list, removing invalid projects from
5160 # returned list
5161 # NOTE: modifies $projlist, but does not remove entries from it
5162 sub fill_project_list_info {
5163         my $projlist = shift;
5164         my @projects;
5165
5166         my $show_ctags = gitweb_check_feature('ctags');
5167  PROJECT:
5168         foreach my $pr (@$projlist) {
5169                 my (@activity) = git_get_last_activity($pr->{'path'});
5170                 unless (@activity) {
5171                         next PROJECT;
5172                 }
5173                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5174                 if (!defined $pr->{'descr'}) {
5175                         my $descr = git_get_project_description($pr->{'path'}) || "";
5176                         $descr = to_utf8($descr);
5177                         $pr->{'descr_long'} = $descr;
5178                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5179                 }
5180                 if (!defined $pr->{'owner'}) {
5181                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5182                 }
5183                 if ($show_ctags) {
5184                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5185                 }
5186                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5187                         my $cat = git_get_project_category($pr->{'path'}) ||
5188                                                            $project_list_default_category;
5189                         $pr->{'category'} = to_utf8($cat);
5190                 }
5191
5192                 push @projects, $pr;
5193         }
5194
5195         return @projects;
5196 }
5197
5198 sub sort_projects_list {
5199         my ($projlist, $order) = @_;
5200         my @projects;
5201
5202         my %order_info = (
5203                 project => { key => 'path', type => 'str' },
5204                 descr => { key => 'descr_long', type => 'str' },
5205                 owner => { key => 'owner', type => 'str' },
5206                 age => { key => 'age', type => 'num' }
5207         );
5208         my $oi = $order_info{$order};
5209         return @$projlist unless defined $oi;
5210         if ($oi->{'type'} eq 'str') {
5211                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5212         } else {
5213                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5214         }
5215
5216         return @projects;
5217 }
5218
5219 # returns a hash of categories, containing the list of project
5220 # belonging to each category
5221 sub build_projlist_by_category {
5222         my ($projlist, $from, $to) = @_;
5223         my %categories;
5224
5225         $from = 0 unless defined $from;
5226         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5227
5228         for (my $i = $from; $i <= $to; $i++) {
5229                 my $pr = $projlist->[$i];
5230                 push @{$categories{ $pr->{'category'} }}, $pr;
5231         }
5232
5233         return wantarray ? %categories : \%categories;
5234 }
5235
5236 # print 'sort by' <th> element, generating 'sort by $name' replay link
5237 # if that order is not selected
5238 sub print_sort_th {
5239         print format_sort_th(@_);
5240 }
5241
5242 sub format_sort_th {
5243         my ($name, $order, $header) = @_;
5244         my $sort_th = "";
5245         $header ||= ucfirst($name);
5246
5247         if ($order eq $name) {
5248                 $sort_th .= "<th>$header</th>\n";
5249         } else {
5250                 $sort_th .= "<th>" .
5251                             $cgi->a({-href => href(-replay=>1, order=>$name),
5252                                      -class => "header"}, $header) .
5253                             "</th>\n";
5254         }
5255
5256         return $sort_th;
5257 }
5258
5259 sub git_project_list_rows {
5260         my ($projlist, $from, $to, $check_forks) = @_;
5261
5262         $from = 0 unless defined $from;
5263         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5264
5265         my $alternate = 1;
5266         for (my $i = $from; $i <= $to; $i++) {
5267                 my $pr = $projlist->[$i];
5268
5269                 if ($alternate) {
5270                         print "<tr class=\"dark\">\n";
5271                 } else {
5272                         print "<tr class=\"light\">\n";
5273                 }
5274                 $alternate ^= 1;
5275
5276                 if ($check_forks) {
5277                         print "<td>";
5278                         if ($pr->{'forks'}) {
5279                                 my $nforks = scalar @{$pr->{'forks'}};
5280                                 if ($nforks > 0) {
5281                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5282                                                        -title => "$nforks forks"}, "+");
5283                                 } else {
5284                                         print $cgi->span({-title => "$nforks forks"}, "+");
5285                                 }
5286                         }
5287                         print "</td>\n";
5288                 }
5289                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5290                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5291                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5292                                         -class => "list", -title => $pr->{'descr_long'}},
5293                                         esc_html($pr->{'descr'})) . "</td>\n" .
5294                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5295                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5296                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5297                       "<td class=\"link\">" .
5298                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5299                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5300                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5301                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5302                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5303                       "</td>\n" .
5304                       "</tr>\n";
5305         }
5306 }
5307
5308 sub git_project_list_body {
5309         # actually uses global variable $project
5310         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5311         my @projects = @$projlist;
5312
5313         my $check_forks = gitweb_check_feature('forks');
5314         my $show_ctags  = gitweb_check_feature('ctags');
5315         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5316         $check_forks = undef
5317                 if ($tagfilter || $searchtext);
5318
5319         # filtering out forks before filling info allows to do less work
5320         @projects = filter_forks_from_projects_list(\@projects)
5321                 if ($check_forks);
5322         @projects = fill_project_list_info(\@projects);
5323         # searching projects require filling to be run before it
5324         @projects = search_projects_list(\@projects,
5325                                          'searchtext' => $searchtext,
5326                                          'tagfilter'  => $tagfilter)
5327                 if ($tagfilter || $searchtext);
5328
5329         $order ||= $default_projects_order;
5330         $from = 0 unless defined $from;
5331         $to = $#projects if (!defined $to || $#projects < $to);
5332
5333         # short circuit
5334         if ($from > $to) {
5335                 print "<center>\n".
5336                       "<b>No such projects found</b><br />\n".
5337                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5338                       "</center>\n<br />\n";
5339                 return;
5340         }
5341
5342         @projects = sort_projects_list(\@projects, $order);
5343
5344         if ($show_ctags) {
5345                 my $ctags = git_gather_all_ctags(\@projects);
5346                 my $cloud = git_populate_project_tagcloud($ctags);
5347                 print git_show_project_tagcloud($cloud, 64);
5348         }
5349
5350         print "<table class=\"project_list\">\n";
5351         unless ($no_header) {
5352                 print "<tr>\n";
5353                 if ($check_forks) {
5354                         print "<th></th>\n";
5355                 }
5356                 print_sort_th('project', $order, 'Project');
5357                 print_sort_th('descr', $order, 'Description');
5358                 print_sort_th('owner', $order, 'Owner');
5359                 print_sort_th('age', $order, 'Last Change');
5360                 print "<th></th>\n" . # for links
5361                       "</tr>\n";
5362         }
5363
5364         if ($projects_list_group_categories) {
5365                 # only display categories with projects in the $from-$to window
5366                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5367                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5368                 foreach my $cat (sort keys %categories) {
5369                         unless ($cat eq "") {
5370                                 print "<tr>\n";
5371                                 if ($check_forks) {
5372                                         print "<td></td>\n";
5373                                 }
5374                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5375                                 print "</tr>\n";
5376                         }
5377
5378                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5379                 }
5380         } else {
5381                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5382         }
5383
5384         if (defined $extra) {
5385                 print "<tr>\n";
5386                 if ($check_forks) {
5387                         print "<td></td>\n";
5388                 }
5389                 print "<td colspan=\"5\">$extra</td>\n" .
5390                       "</tr>\n";
5391         }
5392         print "</table>\n";
5393 }
5394
5395 sub git_log_body {
5396         # uses global variable $project
5397         my ($commitlist, $from, $to, $refs, $extra) = @_;
5398
5399         $from = 0 unless defined $from;
5400         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5401
5402         for (my $i = 0; $i <= $to; $i++) {
5403                 my %co = %{$commitlist->[$i]};
5404                 next if !%co;
5405                 my $commit = $co{'id'};
5406                 my $ref = format_ref_marker($refs, $commit);
5407                 git_print_header_div('commit',
5408                                "<span class=\"age\">$co{'age_string'}</span>" .
5409                                esc_html($co{'title'}) . $ref,
5410                                $commit);
5411                 print "<div class=\"title_text\">\n" .
5412                       "<div class=\"log_link\">\n" .
5413                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5414                       " | " .
5415                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5416                       " | " .
5417                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5418                       "<br/>\n" .
5419                       "</div>\n";
5420                       git_print_authorship(\%co, -tag => 'span');
5421                       print "<br/>\n</div>\n";
5422
5423                 print "<div class=\"log_body\">\n";
5424                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5425                 print "</div>\n";
5426         }
5427         if ($extra) {
5428                 print "<div class=\"page_nav\">\n";
5429                 print "$extra\n";
5430                 print "</div>\n";
5431         }
5432 }
5433
5434 sub git_shortlog_body {
5435         # uses global variable $project
5436         my ($commitlist, $from, $to, $refs, $extra) = @_;
5437
5438         $from = 0 unless defined $from;
5439         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5440
5441         print "<table class=\"shortlog\">\n";
5442         my $alternate = 1;
5443         for (my $i = $from; $i <= $to; $i++) {
5444                 my %co = %{$commitlist->[$i]};
5445                 my $commit = $co{'id'};
5446                 my $ref = format_ref_marker($refs, $commit);
5447                 if ($alternate) {
5448                         print "<tr class=\"dark\">\n";
5449                 } else {
5450                         print "<tr class=\"light\">\n";
5451                 }
5452                 $alternate ^= 1;
5453                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5454                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5455                       format_author_html('td', \%co, 10) . "<td>";
5456                 print format_subject_html($co{'title'}, $co{'title_short'},
5457                                           href(action=>"commit", hash=>$commit), $ref);
5458                 print "</td>\n" .
5459                       "<td class=\"link\">" .
5460                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5461                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5462                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5463                 my $snapshot_links = format_snapshot_links($commit);
5464                 if (defined $snapshot_links) {
5465                         print " | " . $snapshot_links;
5466                 }
5467                 print "</td>\n" .
5468                       "</tr>\n";
5469         }
5470         if (defined $extra) {
5471                 print "<tr>\n" .
5472                       "<td colspan=\"4\">$extra</td>\n" .
5473                       "</tr>\n";
5474         }
5475         print "</table>\n";
5476 }
5477
5478 sub git_history_body {
5479         # Warning: assumes constant type (blob or tree) during history
5480         my ($commitlist, $from, $to, $refs, $extra,
5481             $file_name, $file_hash, $ftype) = @_;
5482
5483         $from = 0 unless defined $from;
5484         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5485
5486         print "<table class=\"history\">\n";
5487         my $alternate = 1;
5488         for (my $i = $from; $i <= $to; $i++) {
5489                 my %co = %{$commitlist->[$i]};
5490                 if (!%co) {
5491                         next;
5492                 }
5493                 my $commit = $co{'id'};
5494
5495                 my $ref = format_ref_marker($refs, $commit);
5496
5497                 if ($alternate) {
5498                         print "<tr class=\"dark\">\n";
5499                 } else {
5500                         print "<tr class=\"light\">\n";
5501                 }
5502                 $alternate ^= 1;
5503                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5504         # shortlog:   format_author_html('td', \%co, 10)
5505                       format_author_html('td', \%co, 15, 3) . "<td>";
5506                 # originally git_history used chop_str($co{'title'}, 50)
5507                 print format_subject_html($co{'title'}, $co{'title_short'},
5508                                           href(action=>"commit", hash=>$commit), $ref);
5509                 print "</td>\n" .
5510                       "<td class=\"link\">" .
5511                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5512                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5513
5514                 if ($ftype eq 'blob') {
5515                         my $blob_current = $file_hash;
5516                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5517                         if (defined $blob_current && defined $blob_parent &&
5518                                         $blob_current ne $blob_parent) {
5519                                 print " | " .
5520                                         $cgi->a({-href => href(action=>"blobdiff",
5521                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5522                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5523                                                                file_name=>$file_name)},
5524                                                 "diff to current");
5525                         }
5526                 }
5527                 print "</td>\n" .
5528                       "</tr>\n";
5529         }
5530         if (defined $extra) {
5531                 print "<tr>\n" .
5532                       "<td colspan=\"4\">$extra</td>\n" .
5533                       "</tr>\n";
5534         }
5535         print "</table>\n";
5536 }
5537
5538 sub git_tags_body {
5539         # uses global variable $project
5540         my ($taglist, $from, $to, $extra) = @_;
5541         $from = 0 unless defined $from;
5542         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5543
5544         print "<table class=\"tags\">\n";
5545         my $alternate = 1;
5546         for (my $i = $from; $i <= $to; $i++) {
5547                 my $entry = $taglist->[$i];
5548                 my %tag = %$entry;
5549                 my $comment = $tag{'subject'};
5550                 my $comment_short;
5551                 if (defined $comment) {
5552                         $comment_short = chop_str($comment, 30, 5);
5553                 }
5554                 if ($alternate) {
5555                         print "<tr class=\"dark\">\n";
5556                 } else {
5557                         print "<tr class=\"light\">\n";
5558                 }
5559                 $alternate ^= 1;
5560                 if (defined $tag{'age'}) {
5561                         print "<td><i>$tag{'age'}</i></td>\n";
5562                 } else {
5563                         print "<td></td>\n";
5564                 }
5565                 print "<td>" .
5566                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5567                                -class => "list name"}, esc_html($tag{'name'})) .
5568                       "</td>\n" .
5569                       "<td>";
5570                 if (defined $comment) {
5571                         print format_subject_html($comment, $comment_short,
5572                                                   href(action=>"tag", hash=>$tag{'id'}));
5573                 }
5574                 print "</td>\n" .
5575                       "<td class=\"selflink\">";
5576                 if ($tag{'type'} eq "tag") {
5577                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5578                 } else {
5579                         print "&nbsp;";
5580                 }
5581                 print "</td>\n" .
5582                       "<td class=\"link\">" . " | " .
5583                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5584                 if ($tag{'reftype'} eq "commit") {
5585                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5586                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5587                 } elsif ($tag{'reftype'} eq "blob") {
5588                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5589                 }
5590                 print "</td>\n" .
5591                       "</tr>";
5592         }
5593         if (defined $extra) {
5594                 print "<tr>\n" .
5595                       "<td colspan=\"5\">$extra</td>\n" .
5596                       "</tr>\n";
5597         }
5598         print "</table>\n";
5599 }
5600
5601 sub git_heads_body {
5602         # uses global variable $project
5603         my ($headlist, $head, $from, $to, $extra) = @_;
5604         $from = 0 unless defined $from;
5605         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5606
5607         print "<table class=\"heads\">\n";
5608         my $alternate = 1;
5609         for (my $i = $from; $i <= $to; $i++) {
5610                 my $entry = $headlist->[$i];
5611                 my %ref = %$entry;
5612                 my $curr = $ref{'id'} eq $head;
5613                 if ($alternate) {
5614                         print "<tr class=\"dark\">\n";
5615                 } else {
5616                         print "<tr class=\"light\">\n";
5617                 }
5618                 $alternate ^= 1;
5619                 print "<td><i>$ref{'age'}</i></td>\n" .
5620                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5621                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5622                                -class => "list name"},esc_html($ref{'name'})) .
5623                       "</td>\n" .
5624                       "<td class=\"link\">" .
5625                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5626                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5627                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5628                       "</td>\n" .
5629                       "</tr>";
5630         }
5631         if (defined $extra) {
5632                 print "<tr>\n" .
5633                       "<td colspan=\"3\">$extra</td>\n" .
5634                       "</tr>\n";
5635         }
5636         print "</table>\n";
5637 }
5638
5639 # Display a single remote block
5640 sub git_remote_block {
5641         my ($remote, $rdata, $limit, $head) = @_;
5642
5643         my $heads = $rdata->{'heads'};
5644         my $fetch = $rdata->{'fetch'};
5645         my $push = $rdata->{'push'};
5646
5647         my $urls_table = "<table class=\"projects_list\">\n" ;
5648
5649         if (defined $fetch) {
5650                 if ($fetch eq $push) {
5651                         $urls_table .= format_repo_url("URL", $fetch);
5652                 } else {
5653                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5654                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5655                 }
5656         } elsif (defined $push) {
5657                 $urls_table .= format_repo_url("Push URL", $push);
5658         } else {
5659                 $urls_table .= format_repo_url("", "No remote URL");
5660         }
5661
5662         $urls_table .= "</table>\n";
5663
5664         my $dots;
5665         if (defined $limit && $limit < @$heads) {
5666                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5667         }
5668
5669         print $urls_table;
5670         git_heads_body($heads, $head, 0, $limit, $dots);
5671 }
5672
5673 # Display a list of remote names with the respective fetch and push URLs
5674 sub git_remotes_list {
5675         my ($remotedata, $limit) = @_;
5676         print "<table class=\"heads\">\n";
5677         my $alternate = 1;
5678         my @remotes = sort keys %$remotedata;
5679
5680         my $limited = $limit && $limit < @remotes;
5681
5682         $#remotes = $limit - 1 if $limited;
5683
5684         while (my $remote = shift @remotes) {
5685                 my $rdata = $remotedata->{$remote};
5686                 my $fetch = $rdata->{'fetch'};
5687                 my $push = $rdata->{'push'};
5688                 if ($alternate) {
5689                         print "<tr class=\"dark\">\n";
5690                 } else {
5691                         print "<tr class=\"light\">\n";
5692                 }
5693                 $alternate ^= 1;
5694                 print "<td>" .
5695                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5696                                -class=> "list name"},esc_html($remote)) .
5697                       "</td>";
5698                 print "<td class=\"link\">" .
5699                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5700                       " | " .
5701                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5702                       "</td>";
5703
5704                 print "</tr>\n";
5705         }
5706
5707         if ($limited) {
5708                 print "<tr>\n" .
5709                       "<td colspan=\"3\">" .
5710                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5711                       "</td>\n" . "</tr>\n";
5712         }
5713
5714         print "</table>";
5715 }
5716
5717 # Display remote heads grouped by remote, unless there are too many
5718 # remotes, in which case we only display the remote names
5719 sub git_remotes_body {
5720         my ($remotedata, $limit, $head) = @_;
5721         if ($limit and $limit < keys %$remotedata) {
5722                 git_remotes_list($remotedata, $limit);
5723         } else {
5724                 fill_remote_heads($remotedata);
5725                 while (my ($remote, $rdata) = each %$remotedata) {
5726                         git_print_section({-class=>"remote", -id=>$remote},
5727                                 ["remotes", $remote, $remote], sub {
5728                                         git_remote_block($remote, $rdata, $limit, $head);
5729                                 });
5730                 }
5731         }
5732 }
5733
5734 sub git_search_message {
5735         my %co = @_;
5736
5737         my $greptype;
5738         if ($searchtype eq 'commit') {
5739                 $greptype = "--grep=";
5740         } elsif ($searchtype eq 'author') {
5741                 $greptype = "--author=";
5742         } elsif ($searchtype eq 'committer') {
5743                 $greptype = "--committer=";
5744         }
5745         $greptype .= $searchtext;
5746         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5747                                        $greptype, '--regexp-ignore-case',
5748                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5749
5750         my $paging_nav = '';
5751         if ($page > 0) {
5752                 $paging_nav .=
5753                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5754                                 "first") .
5755                         " &sdot; " .
5756                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5757                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5758         } else {
5759                 $paging_nav .= "first &sdot; prev";
5760         }
5761         my $next_link = '';
5762         if ($#commitlist >= 100) {
5763                 $next_link =
5764                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5765                                  -accesskey => "n", -title => "Alt-n"}, "next");
5766                 $paging_nav .= " &sdot; $next_link";
5767         } else {
5768                 $paging_nav .= " &sdot; next";
5769         }
5770
5771         git_header_html();
5772
5773         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5774         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5775         if ($page == 0 && !@commitlist) {
5776                 print "<p>No match.</p>\n";
5777         } else {
5778                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5779         }
5780
5781         git_footer_html();
5782 }
5783
5784 sub git_search_changes {
5785         my %co = @_;
5786
5787         local $/ = "\n";
5788         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5789                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5790                 ($search_use_regexp ? '--pickaxe-regex' : ())
5791                         or die_error(500, "Open git-log failed");
5792
5793         git_header_html();
5794
5795         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5796         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5797
5798         print "<table class=\"pickaxe search\">\n";
5799         my $alternate = 1;
5800         undef %co;
5801         my @files;
5802         while (my $line = <$fd>) {
5803                 chomp $line;
5804                 next unless $line;
5805
5806                 my %set = parse_difftree_raw_line($line);
5807                 if (defined $set{'commit'}) {
5808                         # finish previous commit
5809                         if (%co) {
5810                                 print "</td>\n" .
5811                                       "<td class=\"link\">" .
5812                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5813                                               "commit") .
5814                                       " | " .
5815                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5816                                                              hash_base=>$co{'id'})},
5817                                               "tree") .
5818                                       "</td>\n" .
5819                                       "</tr>\n";
5820                         }
5821
5822                         if ($alternate) {
5823                                 print "<tr class=\"dark\">\n";
5824                         } else {
5825                                 print "<tr class=\"light\">\n";
5826                         }
5827                         $alternate ^= 1;
5828                         %co = parse_commit($set{'commit'});
5829                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5830                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5831                               "<td><i>$author</i></td>\n" .
5832                               "<td>" .
5833                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5834                                       -class => "list subject"},
5835                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5836                 } elsif (defined $set{'to_id'}) {
5837                         next if ($set{'to_id'} =~ m/^0{40}$/);
5838
5839                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5840                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5841                                       -class => "list"},
5842                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5843                               "<br/>\n";
5844                 }
5845         }
5846         close $fd;
5847
5848         # finish last commit (warning: repetition!)
5849         if (%co) {
5850                 print "</td>\n" .
5851                       "<td class=\"link\">" .
5852                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5853                               "commit") .
5854                       " | " .
5855                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5856                                              hash_base=>$co{'id'})},
5857                               "tree") .
5858                       "</td>\n" .
5859                       "</tr>\n";
5860         }
5861
5862         print "</table>\n";
5863
5864         git_footer_html();
5865 }
5866
5867 sub git_search_files {
5868         my %co = @_;
5869
5870         local $/ = "\n";
5871         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5872                 $search_use_regexp ? ('-E', '-i') : '-F',
5873                 $searchtext, $co{'tree'}
5874                         or die_error(500, "Open git-grep failed");
5875
5876         git_header_html();
5877
5878         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5879         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5880
5881         print "<table class=\"grep_search\">\n";
5882         my $alternate = 1;
5883         my $matches = 0;
5884         my $lastfile = '';
5885         while (my $line = <$fd>) {
5886                 chomp $line;
5887                 my ($file, $file_href, $lno, $ltext, $binary);
5888                 last if ($matches++ > 1000);
5889                 if ($line =~ /^Binary file (.+) matches$/) {
5890                         $file = $1;
5891                         $binary = 1;
5892                 } else {
5893                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5894                         $file =~ s/^$co{'tree'}://;
5895                 }
5896                 if ($file ne $lastfile) {
5897                         $lastfile and print "</td></tr>\n";
5898                         if ($alternate++) {
5899                                 print "<tr class=\"dark\">\n";
5900                         } else {
5901                                 print "<tr class=\"light\">\n";
5902                         }
5903                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5904                                           file_name=>$file);
5905                         print "<td class=\"list\">".
5906                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5907                         print "</td><td>\n";
5908                         $lastfile = $file;
5909                 }
5910                 if ($binary) {
5911                         print "<div class=\"binary\">Binary file</div>\n";
5912                 } else {
5913                         $ltext = untabify($ltext);
5914                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5915                                 $ltext = esc_html($1, -nbsp=>1);
5916                                 $ltext .= '<span class="match">';
5917                                 $ltext .= esc_html($2, -nbsp=>1);
5918                                 $ltext .= '</span>';
5919                                 $ltext .= esc_html($3, -nbsp=>1);
5920                         } else {
5921                                 $ltext = esc_html($ltext, -nbsp=>1);
5922                         }
5923                         print "<div class=\"pre\">" .
5924                                 $cgi->a({-href => $file_href.'#l'.$lno,
5925                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5926                                 ' ' .  $ltext . "</div>\n";
5927                 }
5928         }
5929         if ($lastfile) {
5930                 print "</td></tr>\n";
5931                 if ($matches > 1000) {
5932                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5933                 }
5934         } else {
5935                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5936         }
5937         close $fd;
5938
5939         print "</table>\n";
5940
5941         git_footer_html();
5942 }
5943
5944 sub git_search_grep_body {
5945         my ($commitlist, $from, $to, $extra) = @_;
5946         $from = 0 unless defined $from;
5947         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5948
5949         print "<table class=\"commit_search\">\n";
5950         my $alternate = 1;
5951         for (my $i = $from; $i <= $to; $i++) {
5952                 my %co = %{$commitlist->[$i]};
5953                 if (!%co) {
5954                         next;
5955                 }
5956                 my $commit = $co{'id'};
5957                 if ($alternate) {
5958                         print "<tr class=\"dark\">\n";
5959                 } else {
5960                         print "<tr class=\"light\">\n";
5961                 }
5962                 $alternate ^= 1;
5963                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5964                       format_author_html('td', \%co, 15, 5) .
5965                       "<td>" .
5966                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5967                                -class => "list subject"},
5968                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5969                 my $comment = $co{'comment'};
5970                 foreach my $line (@$comment) {
5971                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5972                                 my ($lead, $match, $trail) = ($1, $2, $3);
5973                                 $match = chop_str($match, 70, 5, 'center');
5974                                 my $contextlen = int((80 - length($match))/2);
5975                                 $contextlen = 30 if ($contextlen > 30);
5976                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5977                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5978
5979                                 $lead  = esc_html($lead);
5980                                 $match = esc_html($match);
5981                                 $trail = esc_html($trail);
5982
5983                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5984                         }
5985                 }
5986                 print "</td>\n" .
5987                       "<td class=\"link\">" .
5988                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5989                       " | " .
5990                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5991                       " | " .
5992                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5993                 print "</td>\n" .
5994                       "</tr>\n";
5995         }
5996         if (defined $extra) {
5997                 print "<tr>\n" .
5998                       "<td colspan=\"3\">$extra</td>\n" .
5999                       "</tr>\n";
6000         }
6001         print "</table>\n";
6002 }
6003
6004 ## ======================================================================
6005 ## ======================================================================
6006 ## actions
6007
6008 sub git_project_list {
6009         my $order = $input_params{'order'};
6010         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6011                 die_error(400, "Unknown order parameter");
6012         }
6013
6014         my @list = git_get_projects_list($project_filter, $strict_export);
6015         if (!@list) {
6016                 die_error(404, "No projects found");
6017         }
6018
6019         git_header_html();
6020         if (defined $home_text && -f $home_text) {
6021                 print "<div class=\"index_include\">\n";
6022                 insert_file($home_text);
6023                 print "</div>\n";
6024         }
6025         print $cgi->startform(-method => "get") .
6026               "<p class=\"projsearch\">Search:\n" .
6027               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6028               "</p>" .
6029               $cgi->end_form() . "\n";
6030         git_project_list_body(\@list, $order);
6031         git_footer_html();
6032 }
6033
6034 sub git_forks {
6035         my $order = $input_params{'order'};
6036         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6037                 die_error(400, "Unknown order parameter");
6038         }
6039
6040         my $filter = $project;
6041         $filter =~ s/\.git$//;
6042         my @list = git_get_projects_list($filter);
6043         if (!@list) {
6044                 die_error(404, "No forks found");
6045         }
6046
6047         git_header_html();
6048         git_print_page_nav('','');
6049         git_print_header_div('summary', "$project forks");
6050         git_project_list_body(\@list, $order);
6051         git_footer_html();
6052 }
6053
6054 sub git_project_index {
6055         my @projects = git_get_projects_list($project_filter, $strict_export);
6056         if (!@projects) {
6057                 die_error(404, "No projects found");
6058         }
6059
6060         print $cgi->header(
6061                 -type => 'text/plain',
6062                 -charset => 'utf-8',
6063                 -content_disposition => 'inline; filename="index.aux"');
6064
6065         foreach my $pr (@projects) {
6066                 if (!exists $pr->{'owner'}) {
6067                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6068                 }
6069
6070                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6071                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6072                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6073                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6074                 $path  =~ s/ /\+/g;
6075                 $owner =~ s/ /\+/g;
6076
6077                 print "$path $owner\n";
6078         }
6079 }
6080
6081 sub git_summary {
6082         my $descr = git_get_project_description($project) || "none";
6083         my %co = parse_commit("HEAD");
6084         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6085         my $head = $co{'id'};
6086         my $remote_heads = gitweb_check_feature('remote_heads');
6087
6088         my $owner = git_get_project_owner($project);
6089
6090         my $refs = git_get_references();
6091         # These get_*_list functions return one more to allow us to see if
6092         # there are more ...
6093         my @taglist  = git_get_tags_list(16);
6094         my @headlist = git_get_heads_list(16);
6095         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6096         my @forklist;
6097         my $check_forks = gitweb_check_feature('forks');
6098
6099         if ($check_forks) {
6100                 # find forks of a project
6101                 my $filter = $project;
6102                 $filter =~ s/\.git$//;
6103                 @forklist = git_get_projects_list($filter);
6104                 # filter out forks of forks
6105                 @forklist = filter_forks_from_projects_list(\@forklist)
6106                         if (@forklist);
6107         }
6108
6109         git_header_html();
6110         git_print_page_nav('summary','', $head);
6111
6112         print "<div class=\"title\">&nbsp;</div>\n";
6113         print "<table class=\"projects_list\">\n" .
6114               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6115               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6116         if (defined $cd{'rfc2822'}) {
6117                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6118                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6119         }
6120
6121         # use per project git URL list in $projectroot/$project/cloneurl
6122         # or make project git URL from git base URL and project name
6123         my $url_tag = "URL";
6124         my @url_list = git_get_project_url_list($project);
6125         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6126         foreach my $git_url (@url_list) {
6127                 next unless $git_url;
6128                 print format_repo_url($url_tag, $git_url);
6129                 $url_tag = "";
6130         }
6131
6132         # Tag cloud
6133         my $show_ctags = gitweb_check_feature('ctags');
6134         if ($show_ctags) {
6135                 my $ctags = git_get_project_ctags($project);
6136                 if (%$ctags) {
6137                         # without ability to add tags, don't show if there are none
6138                         my $cloud = git_populate_project_tagcloud($ctags);
6139                         print "<tr id=\"metadata_ctags\">" .
6140                               "<td>content tags</td>" .
6141                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6142                               "</tr>\n";
6143                 }
6144         }
6145
6146         print "</table>\n";
6147
6148         # If XSS prevention is on, we don't include README.html.
6149         # TODO: Allow a readme in some safe format.
6150         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6151                 print "<div class=\"title\">readme</div>\n" .
6152                       "<div class=\"readme\">\n";
6153                 insert_file("$projectroot/$project/README.html");
6154                 print "\n</div>\n"; # class="readme"
6155         }
6156
6157         # we need to request one more than 16 (0..15) to check if
6158         # those 16 are all
6159         my @commitlist = $head ? parse_commits($head, 17) : ();
6160         if (@commitlist) {
6161                 git_print_header_div('shortlog');
6162                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6163                                   $#commitlist <=  15 ? undef :
6164                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6165         }
6166
6167         if (@taglist) {
6168                 git_print_header_div('tags');
6169                 git_tags_body(\@taglist, 0, 15,
6170                               $#taglist <=  15 ? undef :
6171                               $cgi->a({-href => href(action=>"tags")}, "..."));
6172         }
6173
6174         if (@headlist) {
6175                 git_print_header_div('heads');
6176                 git_heads_body(\@headlist, $head, 0, 15,
6177                                $#headlist <= 15 ? undef :
6178                                $cgi->a({-href => href(action=>"heads")}, "..."));
6179         }
6180
6181         if (%remotedata) {
6182                 git_print_header_div('remotes');
6183                 git_remotes_body(\%remotedata, 15, $head);
6184         }
6185
6186         if (@forklist) {
6187                 git_print_header_div('forks');
6188                 git_project_list_body(\@forklist, 'age', 0, 15,
6189                                       $#forklist <= 15 ? undef :
6190                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6191                                       'no_header');
6192         }
6193
6194         git_footer_html();
6195 }
6196
6197 sub git_tag {
6198         my %tag = parse_tag($hash);
6199
6200         if (! %tag) {
6201                 die_error(404, "Unknown tag object");
6202         }
6203
6204         my $head = git_get_head_hash($project);
6205         git_header_html();
6206         git_print_page_nav('','', $head,undef,$head);
6207         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6208         print "<div class=\"title_text\">\n" .
6209               "<table class=\"object_header\">\n" .
6210               "<tr>\n" .
6211               "<td>object</td>\n" .
6212               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6213                                $tag{'object'}) . "</td>\n" .
6214               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6215                                               $tag{'type'}) . "</td>\n" .
6216               "</tr>\n";
6217         if (defined($tag{'author'})) {
6218                 git_print_authorship_rows(\%tag, 'author');
6219         }
6220         print "</table>\n\n" .
6221               "</div>\n";
6222         print "<div class=\"page_body\">";
6223         my $comment = $tag{'comment'};
6224         foreach my $line (@$comment) {
6225                 chomp $line;
6226                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6227         }
6228         print "</div>\n";
6229         git_footer_html();
6230 }
6231
6232 sub git_blame_common {
6233         my $format = shift || 'porcelain';
6234         if ($format eq 'porcelain' && $cgi->param('js')) {
6235                 $format = 'incremental';
6236                 $action = 'blame_incremental'; # for page title etc
6237         }
6238
6239         # permissions
6240         gitweb_check_feature('blame')
6241                 or die_error(403, "Blame view not allowed");
6242
6243         # error checking
6244         die_error(400, "No file name given") unless $file_name;
6245         $hash_base ||= git_get_head_hash($project);
6246         die_error(404, "Couldn't find base commit") unless $hash_base;
6247         my %co = parse_commit($hash_base)
6248                 or die_error(404, "Commit not found");
6249         my $ftype = "blob";
6250         if (!defined $hash) {
6251                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6252                         or die_error(404, "Error looking up file");
6253         } else {
6254                 $ftype = git_get_type($hash);
6255                 if ($ftype !~ "blob") {
6256                         die_error(400, "Object is not a blob");
6257                 }
6258         }
6259
6260         my $fd;
6261         if ($format eq 'incremental') {
6262                 # get file contents (as base)
6263                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6264                         or die_error(500, "Open git-cat-file failed");
6265         } elsif ($format eq 'data') {
6266                 # run git-blame --incremental
6267                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6268                         $hash_base, "--", $file_name
6269                         or die_error(500, "Open git-blame --incremental failed");
6270         } else {
6271                 # run git-blame --porcelain
6272                 open $fd, "-|", git_cmd(), "blame", '-p',
6273                         $hash_base, '--', $file_name
6274                         or die_error(500, "Open git-blame --porcelain failed");
6275         }
6276
6277         # incremental blame data returns early
6278         if ($format eq 'data') {
6279                 print $cgi->header(
6280                         -type=>"text/plain", -charset => "utf-8",
6281                         -status=> "200 OK");
6282                 local $| = 1; # output autoflush
6283                 while (my $line = <$fd>) {
6284                         print to_utf8($line);
6285                 }
6286                 close $fd
6287                         or print "ERROR $!\n";
6288
6289                 print 'END';
6290                 if (defined $t0 && gitweb_check_feature('timed')) {
6291                         print ' '.
6292                               tv_interval($t0, [ gettimeofday() ]).
6293                               ' '.$number_of_git_cmds;
6294                 }
6295                 print "\n";
6296
6297                 return;
6298         }
6299
6300         # page header
6301         git_header_html();
6302         my $formats_nav =
6303                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6304                         "blob") .
6305                 " | ";
6306         if ($format eq 'incremental') {
6307                 $formats_nav .=
6308                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6309                                 "blame") . " (non-incremental)";
6310         } else {
6311                 $formats_nav .=
6312                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6313                                 "blame") . " (incremental)";
6314         }
6315         $formats_nav .=
6316                 " | " .
6317                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6318                         "history") .
6319                 " | " .
6320                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6321                         "HEAD");
6322         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6323         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6324         git_print_page_path($file_name, $ftype, $hash_base);
6325
6326         # page body
6327         if ($format eq 'incremental') {
6328                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6329                       "This page requires JavaScript to run.\n Use ".
6330                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6331                               'this page').
6332                       " instead.\n".
6333                       "</b></center></div>\n</noscript>\n";
6334
6335                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6336         }
6337
6338         print qq!<div class="page_body">\n!;
6339         print qq!<div id="progress_info">... / ...</div>\n!
6340                 if ($format eq 'incremental');
6341         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6342               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6343               qq!<thead>\n!.
6344               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6345               qq!</thead>\n!.
6346               qq!<tbody>\n!;
6347
6348         my @rev_color = qw(light dark);
6349         my $num_colors = scalar(@rev_color);
6350         my $current_color = 0;
6351
6352         if ($format eq 'incremental') {
6353                 my $color_class = $rev_color[$current_color];
6354
6355                 #contents of a file
6356                 my $linenr = 0;
6357         LINE:
6358                 while (my $line = <$fd>) {
6359                         chomp $line;
6360                         $linenr++;
6361
6362                         print qq!<tr id="l$linenr" class="$color_class">!.
6363                               qq!<td class="sha1"><a href=""> </a></td>!.
6364                               qq!<td class="linenr">!.
6365                               qq!<a class="linenr" href="">$linenr</a></td>!;
6366                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6367                         print qq!</tr>\n!;
6368                 }
6369
6370         } else { # porcelain, i.e. ordinary blame
6371                 my %metainfo = (); # saves information about commits
6372
6373                 # blame data
6374         LINE:
6375                 while (my $line = <$fd>) {
6376                         chomp $line;
6377                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6378                         # no <lines in group> for subsequent lines in group of lines
6379                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6380                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6381                         if (!exists $metainfo{$full_rev}) {
6382                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6383                         }
6384                         my $meta = $metainfo{$full_rev};
6385                         my $data;
6386                         while ($data = <$fd>) {
6387                                 chomp $data;
6388                                 last if ($data =~ s/^\t//); # contents of line
6389                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6390                                         $meta->{$1} = $2 unless exists $meta->{$1};
6391                                 }
6392                                 if ($data =~ /^previous /) {
6393                                         $meta->{'nprevious'}++;
6394                                 }
6395                         }
6396                         my $short_rev = substr($full_rev, 0, 8);
6397                         my $author = $meta->{'author'};
6398                         my %date =
6399                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6400                         my $date = $date{'iso-tz'};
6401                         if ($group_size) {
6402                                 $current_color = ($current_color + 1) % $num_colors;
6403                         }
6404                         my $tr_class = $rev_color[$current_color];
6405                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6406                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6407                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6408                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6409                         if ($group_size) {
6410                                 print "<td class=\"sha1\"";
6411                                 print " title=\"". esc_html($author) . ", $date\"";
6412                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6413                                 print ">";
6414                                 print $cgi->a({-href => href(action=>"commit",
6415                                                              hash=>$full_rev,
6416                                                              file_name=>$file_name)},
6417                                               esc_html($short_rev));
6418                                 if ($group_size >= 2) {
6419                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6420                                         if (@author_initials) {
6421                                                 print "<br />" .
6422                                                       esc_html(join('', @author_initials));
6423                                                 #           or join('.', ...)
6424                                         }
6425                                 }
6426                                 print "</td>\n";
6427                         }
6428                         # 'previous' <sha1 of parent commit> <filename at commit>
6429                         if (exists $meta->{'previous'} &&
6430                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6431                                 $meta->{'parent'} = $1;
6432                                 $meta->{'file_parent'} = unquote($2);
6433                         }
6434                         my $linenr_commit =
6435                                 exists($meta->{'parent'}) ?
6436                                 $meta->{'parent'} : $full_rev;
6437                         my $linenr_filename =
6438                                 exists($meta->{'file_parent'}) ?
6439                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6440                         my $blamed = href(action => 'blame',
6441                                           file_name => $linenr_filename,
6442                                           hash_base => $linenr_commit);
6443                         print "<td class=\"linenr\">";
6444                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6445                                         -class => "linenr" },
6446                                       esc_html($lineno));
6447                         print "</td>";
6448                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6449                         print "</tr>\n";
6450                 } # end while
6451
6452         }
6453
6454         # footer
6455         print "</tbody>\n".
6456               "</table>\n"; # class="blame"
6457         print "</div>\n";   # class="blame_body"
6458         close $fd
6459                 or print "Reading blob failed\n";
6460
6461         git_footer_html();
6462 }
6463
6464 sub git_blame {
6465         git_blame_common();
6466 }
6467
6468 sub git_blame_incremental {
6469         git_blame_common('incremental');
6470 }
6471
6472 sub git_blame_data {
6473         git_blame_common('data');
6474 }
6475
6476 sub git_tags {
6477         my $head = git_get_head_hash($project);
6478         git_header_html();
6479         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6480         git_print_header_div('summary', $project);
6481
6482         my @tagslist = git_get_tags_list();
6483         if (@tagslist) {
6484                 git_tags_body(\@tagslist);
6485         }
6486         git_footer_html();
6487 }
6488
6489 sub git_heads {
6490         my $head = git_get_head_hash($project);
6491         git_header_html();
6492         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6493         git_print_header_div('summary', $project);
6494
6495         my @headslist = git_get_heads_list();
6496         if (@headslist) {
6497                 git_heads_body(\@headslist, $head);
6498         }
6499         git_footer_html();
6500 }
6501
6502 # used both for single remote view and for list of all the remotes
6503 sub git_remotes {
6504         gitweb_check_feature('remote_heads')
6505                 or die_error(403, "Remote heads view is disabled");
6506
6507         my $head = git_get_head_hash($project);
6508         my $remote = $input_params{'hash'};
6509
6510         my $remotedata = git_get_remotes_list($remote);
6511         die_error(500, "Unable to get remote information") unless defined $remotedata;
6512
6513         unless (%$remotedata) {
6514                 die_error(404, defined $remote ?
6515                         "Remote $remote not found" :
6516                         "No remotes found");
6517         }
6518
6519         git_header_html(undef, undef, -action_extra => $remote);
6520         git_print_page_nav('', '',  $head, undef, $head,
6521                 format_ref_views($remote ? '' : 'remotes'));
6522
6523         fill_remote_heads($remotedata);
6524         if (defined $remote) {
6525                 git_print_header_div('remotes', "$remote remote for $project");
6526                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6527         } else {
6528                 git_print_header_div('summary', "$project remotes");
6529                 git_remotes_body($remotedata, undef, $head);
6530         }
6531
6532         git_footer_html();
6533 }
6534
6535 sub git_blob_plain {
6536         my $type = shift;
6537         my $expires;
6538
6539         if (!defined $hash) {
6540                 if (defined $file_name) {
6541                         my $base = $hash_base || git_get_head_hash($project);
6542                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6543                                 or die_error(404, "Cannot find file");
6544                 } else {
6545                         die_error(400, "No file name defined");
6546                 }
6547         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6548                 # blobs defined by non-textual hash id's can be cached
6549                 $expires = "+1d";
6550         }
6551
6552         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6553                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6554
6555         # content-type (can include charset)
6556         $type = blob_contenttype($fd, $file_name, $type);
6557
6558         # "save as" filename, even when no $file_name is given
6559         my $save_as = "$hash";
6560         if (defined $file_name) {
6561                 $save_as = $file_name;
6562         } elsif ($type =~ m/^text\//) {
6563                 $save_as .= '.txt';
6564         }
6565
6566         # With XSS prevention on, blobs of all types except a few known safe
6567         # ones are served with "Content-Disposition: attachment" to make sure
6568         # they don't run in our security domain.  For certain image types,
6569         # blob view writes an <img> tag referring to blob_plain view, and we
6570         # want to be sure not to break that by serving the image as an
6571         # attachment (though Firefox 3 doesn't seem to care).
6572         my $sandbox = $prevent_xss &&
6573                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6574
6575         # serve text/* as text/plain
6576         if ($prevent_xss &&
6577             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6578              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6579                 my $rest = $1;
6580                 $rest = defined $rest ? $rest : '';
6581                 $type = "text/plain$rest";
6582         }
6583
6584         print $cgi->header(
6585                 -type => $type,
6586                 -expires => $expires,
6587                 -content_disposition =>
6588                         ($sandbox ? 'attachment' : 'inline')
6589                         . '; filename="' . $save_as . '"');
6590         local $/ = undef;
6591         binmode STDOUT, ':raw';
6592         print <$fd>;
6593         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6594         close $fd;
6595 }
6596
6597 sub git_blob {
6598         my $expires;
6599
6600         if (!defined $hash) {
6601                 if (defined $file_name) {
6602                         my $base = $hash_base || git_get_head_hash($project);
6603                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6604                                 or die_error(404, "Cannot find file");
6605                 } else {
6606                         die_error(400, "No file name defined");
6607                 }
6608         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6609                 # blobs defined by non-textual hash id's can be cached
6610                 $expires = "+1d";
6611         }
6612
6613         my $have_blame = gitweb_check_feature('blame');
6614         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6615                 or die_error(500, "Couldn't cat $file_name, $hash");
6616         my $mimetype = blob_mimetype($fd, $file_name);
6617         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6618         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6619                 close $fd;
6620                 return git_blob_plain($mimetype);
6621         }
6622         # we can have blame only for text/* mimetype
6623         $have_blame &&= ($mimetype =~ m!^text/!);
6624
6625         my $highlight = gitweb_check_feature('highlight');
6626         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6627         $fd = run_highlighter($fd, $highlight, $syntax)
6628                 if $syntax;
6629
6630         git_header_html(undef, $expires);
6631         my $formats_nav = '';
6632         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6633                 if (defined $file_name) {
6634                         if ($have_blame) {
6635                                 $formats_nav .=
6636                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6637                                                 "blame") .
6638                                         " | ";
6639                         }
6640                         $formats_nav .=
6641                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6642                                         "history") .
6643                                 " | " .
6644                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6645                                         "raw") .
6646                                 " | " .
6647                                 $cgi->a({-href => href(action=>"blob",
6648                                                        hash_base=>"HEAD", file_name=>$file_name)},
6649                                         "HEAD");
6650                 } else {
6651                         $formats_nav .=
6652                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6653                                         "raw");
6654                 }
6655                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6656                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6657         } else {
6658                 print "<div class=\"page_nav\">\n" .
6659                       "<br/><br/></div>\n" .
6660                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6661         }
6662         git_print_page_path($file_name, "blob", $hash_base);
6663         print "<div class=\"page_body\">\n";
6664         if ($mimetype =~ m!^image/!) {
6665                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6666                 if ($file_name) {
6667                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6668                 }
6669                 print qq! src="! .
6670                       href(action=>"blob_plain", hash=>$hash,
6671                            hash_base=>$hash_base, file_name=>$file_name) .
6672                       qq!" />\n!;
6673         } else {
6674                 my $nr;
6675                 while (my $line = <$fd>) {
6676                         chomp $line;
6677                         $nr++;
6678                         $line = untabify($line);
6679                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6680                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6681                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6682                 }
6683         }
6684         close $fd
6685                 or print "Reading blob failed.\n";
6686         print "</div>";
6687         git_footer_html();
6688 }
6689
6690 sub git_tree {
6691         if (!defined $hash_base) {
6692                 $hash_base = "HEAD";
6693         }
6694         if (!defined $hash) {
6695                 if (defined $file_name) {
6696                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6697                 } else {
6698                         $hash = $hash_base;
6699                 }
6700         }
6701         die_error(404, "No such tree") unless defined($hash);
6702
6703         my $show_sizes = gitweb_check_feature('show-sizes');
6704         my $have_blame = gitweb_check_feature('blame');
6705
6706         my @entries = ();
6707         {
6708                 local $/ = "\0";
6709                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6710                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6711                         or die_error(500, "Open git-ls-tree failed");
6712                 @entries = map { chomp; $_ } <$fd>;
6713                 close $fd
6714                         or die_error(404, "Reading tree failed");
6715         }
6716
6717         my $refs = git_get_references();
6718         my $ref = format_ref_marker($refs, $hash_base);
6719         git_header_html();
6720         my $basedir = '';
6721         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6722                 my @views_nav = ();
6723                 if (defined $file_name) {
6724                         push @views_nav,
6725                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6726                                         "history"),
6727                                 $cgi->a({-href => href(action=>"tree",
6728                                                        hash_base=>"HEAD", file_name=>$file_name)},
6729                                         "HEAD"),
6730                 }
6731                 my $snapshot_links = format_snapshot_links($hash);
6732                 if (defined $snapshot_links) {
6733                         # FIXME: Should be available when we have no hash base as well.
6734                         push @views_nav, $snapshot_links;
6735                 }
6736                 git_print_page_nav('tree','', $hash_base, undef, undef,
6737                                    join(' | ', @views_nav));
6738                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6739         } else {
6740                 undef $hash_base;
6741                 print "<div class=\"page_nav\">\n";
6742                 print "<br/><br/></div>\n";
6743                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6744         }
6745         if (defined $file_name) {
6746                 $basedir = $file_name;
6747                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6748                         $basedir .= '/';
6749                 }
6750                 git_print_page_path($file_name, 'tree', $hash_base);
6751         }
6752         print "<div class=\"page_body\">\n";
6753         print "<table class=\"tree\">\n";
6754         my $alternate = 1;
6755         # '..' (top directory) link if possible
6756         if (defined $hash_base &&
6757             defined $file_name && $file_name =~ m![^/]+$!) {
6758                 if ($alternate) {
6759                         print "<tr class=\"dark\">\n";
6760                 } else {
6761                         print "<tr class=\"light\">\n";
6762                 }
6763                 $alternate ^= 1;
6764
6765                 my $up = $file_name;
6766                 $up =~ s!/?[^/]+$!!;
6767                 undef $up unless $up;
6768                 # based on git_print_tree_entry
6769                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6770                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6771                 print '<td class="list">';
6772                 print $cgi->a({-href => href(action=>"tree",
6773                                              hash_base=>$hash_base,
6774                                              file_name=>$up)},
6775                               "..");
6776                 print "</td>\n";
6777                 print "<td class=\"link\"></td>\n";
6778
6779                 print "</tr>\n";
6780         }
6781         foreach my $line (@entries) {
6782                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6783
6784                 if ($alternate) {
6785                         print "<tr class=\"dark\">\n";
6786                 } else {
6787                         print "<tr class=\"light\">\n";
6788                 }
6789                 $alternate ^= 1;
6790
6791                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6792
6793                 print "</tr>\n";
6794         }
6795         print "</table>\n" .
6796               "</div>";
6797         git_footer_html();
6798 }
6799
6800 sub snapshot_name {
6801         my ($project, $hash) = @_;
6802
6803         # path/to/project.git  -> project
6804         # path/to/project/.git -> project
6805         my $name = to_utf8($project);
6806         $name =~ s,([^/])/*\.git$,$1,;
6807         $name = basename($name);
6808         # sanitize name
6809         $name =~ s/[[:cntrl:]]/?/g;
6810
6811         my $ver = $hash;
6812         if ($hash =~ /^[0-9a-fA-F]+$/) {
6813                 # shorten SHA-1 hash
6814                 my $full_hash = git_get_full_hash($project, $hash);
6815                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6816                         $ver = git_get_short_hash($project, $hash);
6817                 }
6818         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6819                 # tags don't need shortened SHA-1 hash
6820                 $ver = $1;
6821         } else {
6822                 # branches and other need shortened SHA-1 hash
6823                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6824                         $ver = $1;
6825                 }
6826                 $ver .= '-' . git_get_short_hash($project, $hash);
6827         }
6828         # in case of hierarchical branch names
6829         $ver =~ s!/!.!g;
6830
6831         # name = project-version_string
6832         $name = "$name-$ver";
6833
6834         return wantarray ? ($name, $name) : $name;
6835 }
6836
6837 sub git_snapshot {
6838         my $format = $input_params{'snapshot_format'};
6839         if (!@snapshot_fmts) {
6840                 die_error(403, "Snapshots not allowed");
6841         }
6842         # default to first supported snapshot format
6843         $format ||= $snapshot_fmts[0];
6844         if ($format !~ m/^[a-z0-9]+$/) {
6845                 die_error(400, "Invalid snapshot format parameter");
6846         } elsif (!exists($known_snapshot_formats{$format})) {
6847                 die_error(400, "Unknown snapshot format");
6848         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6849                 die_error(403, "Snapshot format not allowed");
6850         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6851                 die_error(403, "Unsupported snapshot format");
6852         }
6853
6854         my $type = git_get_type("$hash^{}");
6855         if (!$type) {
6856                 die_error(404, 'Object does not exist');
6857         }  elsif ($type eq 'blob') {
6858                 die_error(400, 'Object is not a tree-ish');
6859         }
6860
6861         my ($name, $prefix) = snapshot_name($project, $hash);
6862         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6863         my $cmd = quote_command(
6864                 git_cmd(), 'archive',
6865                 "--format=$known_snapshot_formats{$format}{'format'}",
6866                 "--prefix=$prefix/", $hash);
6867         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6868                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6869         }
6870
6871         $filename =~ s/(["\\])/\\$1/g;
6872         print $cgi->header(
6873                 -type => $known_snapshot_formats{$format}{'type'},
6874                 -content_disposition => 'inline; filename="' . $filename . '"',
6875                 -status => '200 OK');
6876
6877         open my $fd, "-|", $cmd
6878                 or die_error(500, "Execute git-archive failed");
6879         binmode STDOUT, ':raw';
6880         print <$fd>;
6881         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6882         close $fd;
6883 }
6884
6885 sub git_log_generic {
6886         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6887
6888         my $head = git_get_head_hash($project);
6889         if (!defined $base) {
6890                 $base = $head;
6891         }
6892         if (!defined $page) {
6893                 $page = 0;
6894         }
6895         my $refs = git_get_references();
6896
6897         my $commit_hash = $base;
6898         if (defined $parent) {
6899                 $commit_hash = "$parent..$base";
6900         }
6901         my @commitlist =
6902                 parse_commits($commit_hash, 101, (100 * $page),
6903                               defined $file_name ? ($file_name, "--full-history") : ());
6904
6905         my $ftype;
6906         if (!defined $file_hash && defined $file_name) {
6907                 # some commits could have deleted file in question,
6908                 # and not have it in tree, but one of them has to have it
6909                 for (my $i = 0; $i < @commitlist; $i++) {
6910                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6911                         last if defined $file_hash;
6912                 }
6913         }
6914         if (defined $file_hash) {
6915                 $ftype = git_get_type($file_hash);
6916         }
6917         if (defined $file_name && !defined $ftype) {
6918                 die_error(500, "Unknown type of object");
6919         }
6920         my %co;
6921         if (defined $file_name) {
6922                 %co = parse_commit($base)
6923                         or die_error(404, "Unknown commit object");
6924         }
6925
6926
6927         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6928         my $next_link = '';
6929         if ($#commitlist >= 100) {
6930                 $next_link =
6931                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6932                                  -accesskey => "n", -title => "Alt-n"}, "next");
6933         }
6934         my $patch_max = gitweb_get_feature('patches');
6935         if ($patch_max && !defined $file_name) {
6936                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6937                         $paging_nav .= " &sdot; " .
6938                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6939                                         "patches");
6940                 }
6941         }
6942
6943         git_header_html();
6944         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6945         if (defined $file_name) {
6946                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6947         } else {
6948                 git_print_header_div('summary', $project)
6949         }
6950         git_print_page_path($file_name, $ftype, $hash_base)
6951                 if (defined $file_name);
6952
6953         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6954                      $file_name, $file_hash, $ftype);
6955
6956         git_footer_html();
6957 }
6958
6959 sub git_log {
6960         git_log_generic('log', \&git_log_body,
6961                         $hash, $hash_parent);
6962 }
6963
6964 sub git_commit {
6965         $hash ||= $hash_base || "HEAD";
6966         my %co = parse_commit($hash)
6967             or die_error(404, "Unknown commit object");
6968
6969         my $parent  = $co{'parent'};
6970         my $parents = $co{'parents'}; # listref
6971
6972         # we need to prepare $formats_nav before any parameter munging
6973         my $formats_nav;
6974         if (!defined $parent) {
6975                 # --root commitdiff
6976                 $formats_nav .= '(initial)';
6977         } elsif (@$parents == 1) {
6978                 # single parent commit
6979                 $formats_nav .=
6980                         '(parent: ' .
6981                         $cgi->a({-href => href(action=>"commit",
6982                                                hash=>$parent)},
6983                                 esc_html(substr($parent, 0, 7))) .
6984                         ')';
6985         } else {
6986                 # merge commit
6987                 $formats_nav .=
6988                         '(merge: ' .
6989                         join(' ', map {
6990                                 $cgi->a({-href => href(action=>"commit",
6991                                                        hash=>$_)},
6992                                         esc_html(substr($_, 0, 7)));
6993                         } @$parents ) .
6994                         ')';
6995         }
6996         if (gitweb_check_feature('patches') && @$parents <= 1) {
6997                 $formats_nav .= " | " .
6998                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6999                                 "patch");
7000         }
7001
7002         if (!defined $parent) {
7003                 $parent = "--root";
7004         }
7005         my @difftree;
7006         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7007                 @diff_opts,
7008                 (@$parents <= 1 ? $parent : '-c'),
7009                 $hash, "--"
7010                 or die_error(500, "Open git-diff-tree failed");
7011         @difftree = map { chomp; $_ } <$fd>;
7012         close $fd or die_error(404, "Reading git-diff-tree failed");
7013
7014         # non-textual hash id's can be cached
7015         my $expires;
7016         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7017                 $expires = "+1d";
7018         }
7019         my $refs = git_get_references();
7020         my $ref = format_ref_marker($refs, $co{'id'});
7021
7022         git_header_html(undef, $expires);
7023         git_print_page_nav('commit', '',
7024                            $hash, $co{'tree'}, $hash,
7025                            $formats_nav);
7026
7027         if (defined $co{'parent'}) {
7028                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7029         } else {
7030                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7031         }
7032         print "<div class=\"title_text\">\n" .
7033               "<table class=\"object_header\">\n";
7034         git_print_authorship_rows(\%co);
7035         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7036         print "<tr>" .
7037               "<td>tree</td>" .
7038               "<td class=\"sha1\">" .
7039               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7040                        class => "list"}, $co{'tree'}) .
7041               "</td>" .
7042               "<td class=\"link\">" .
7043               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7044                       "tree");
7045         my $snapshot_links = format_snapshot_links($hash);
7046         if (defined $snapshot_links) {
7047                 print " | " . $snapshot_links;
7048         }
7049         print "</td>" .
7050               "</tr>\n";
7051
7052         foreach my $par (@$parents) {
7053                 print "<tr>" .
7054                       "<td>parent</td>" .
7055                       "<td class=\"sha1\">" .
7056                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7057                                class => "list"}, $par) .
7058                       "</td>" .
7059                       "<td class=\"link\">" .
7060                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7061                       " | " .
7062                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7063                       "</td>" .
7064                       "</tr>\n";
7065         }
7066         print "</table>".
7067               "</div>\n";
7068
7069         print "<div class=\"page_body\">\n";
7070         git_print_log($co{'comment'});
7071         print "</div>\n";
7072
7073         git_difftree_body(\@difftree, $hash, @$parents);
7074
7075         git_footer_html();
7076 }
7077
7078 sub git_object {
7079         # object is defined by:
7080         # - hash or hash_base alone
7081         # - hash_base and file_name
7082         my $type;
7083
7084         # - hash or hash_base alone
7085         if ($hash || ($hash_base && !defined $file_name)) {
7086                 my $object_id = $hash || $hash_base;
7087
7088                 open my $fd, "-|", quote_command(
7089                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7090                         or die_error(404, "Object does not exist");
7091                 $type = <$fd>;
7092                 chomp $type;
7093                 close $fd
7094                         or die_error(404, "Object does not exist");
7095
7096         # - hash_base and file_name
7097         } elsif ($hash_base && defined $file_name) {
7098                 $file_name =~ s,/+$,,;
7099
7100                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7101                         or die_error(404, "Base object does not exist");
7102
7103                 # here errors should not hapen
7104                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7105                         or die_error(500, "Open git-ls-tree failed");
7106                 my $line = <$fd>;
7107                 close $fd;
7108
7109                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7110                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7111                         die_error(404, "File or directory for given base does not exist");
7112                 }
7113                 $type = $2;
7114                 $hash = $3;
7115         } else {
7116                 die_error(400, "Not enough information to find object");
7117         }
7118
7119         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7120                                           hash=>$hash, hash_base=>$hash_base,
7121                                           file_name=>$file_name),
7122                              -status => '302 Found');
7123 }
7124
7125 sub git_blobdiff {
7126         my $format = shift || 'html';
7127         my $diff_style = $input_params{'diff_style'} || 'inline';
7128
7129         my $fd;
7130         my @difftree;
7131         my %diffinfo;
7132         my $expires;
7133
7134         # preparing $fd and %diffinfo for git_patchset_body
7135         # new style URI
7136         if (defined $hash_base && defined $hash_parent_base) {
7137                 if (defined $file_name) {
7138                         # read raw output
7139                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7140                                 $hash_parent_base, $hash_base,
7141                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7142                                 or die_error(500, "Open git-diff-tree failed");
7143                         @difftree = map { chomp; $_ } <$fd>;
7144                         close $fd
7145                                 or die_error(404, "Reading git-diff-tree failed");
7146                         @difftree
7147                                 or die_error(404, "Blob diff not found");
7148
7149                 } elsif (defined $hash &&
7150                          $hash =~ /[0-9a-fA-F]{40}/) {
7151                         # try to find filename from $hash
7152
7153                         # read filtered raw output
7154                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7155                                 $hash_parent_base, $hash_base, "--"
7156                                 or die_error(500, "Open git-diff-tree failed");
7157                         @difftree =
7158                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7159                                 # $hash == to_id
7160                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7161                                 map { chomp; $_ } <$fd>;
7162                         close $fd
7163                                 or die_error(404, "Reading git-diff-tree failed");
7164                         @difftree
7165                                 or die_error(404, "Blob diff not found");
7166
7167                 } else {
7168                         die_error(400, "Missing one of the blob diff parameters");
7169                 }
7170
7171                 if (@difftree > 1) {
7172                         die_error(400, "Ambiguous blob diff specification");
7173                 }
7174
7175                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7176                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7177                 $file_name   ||= $diffinfo{'to_file'};
7178
7179                 $hash_parent ||= $diffinfo{'from_id'};
7180                 $hash        ||= $diffinfo{'to_id'};
7181
7182                 # non-textual hash id's can be cached
7183                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7184                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7185                         $expires = '+1d';
7186                 }
7187
7188                 # open patch output
7189                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7190                         '-p', ($format eq 'html' ? "--full-index" : ()),
7191                         $hash_parent_base, $hash_base,
7192                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7193                         or die_error(500, "Open git-diff-tree failed");
7194         }
7195
7196         # old/legacy style URI -- not generated anymore since 1.4.3.
7197         if (!%diffinfo) {
7198                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7199         }
7200
7201         # header
7202         if ($format eq 'html') {
7203                 my $formats_nav =
7204                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7205                                 "raw");
7206                 $formats_nav .= diff_style_nav($diff_style);
7207                 git_header_html(undef, $expires);
7208                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7209                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7210                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7211                 } else {
7212                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7213                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7214                 }
7215                 if (defined $file_name) {
7216                         git_print_page_path($file_name, "blob", $hash_base);
7217                 } else {
7218                         print "<div class=\"page_path\"></div>\n";
7219                 }
7220
7221         } elsif ($format eq 'plain') {
7222                 print $cgi->header(
7223                         -type => 'text/plain',
7224                         -charset => 'utf-8',
7225                         -expires => $expires,
7226                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7227
7228                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7229
7230         } else {
7231                 die_error(400, "Unknown blobdiff format");
7232         }
7233
7234         # patch
7235         if ($format eq 'html') {
7236                 print "<div class=\"page_body\">\n";
7237
7238                 git_patchset_body($fd, $diff_style,
7239                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7240                 close $fd;
7241
7242                 print "</div>\n"; # class="page_body"
7243                 git_footer_html();
7244
7245         } else {
7246                 while (my $line = <$fd>) {
7247                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7248                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7249
7250                         print $line;
7251
7252                         last if $line =~ m!^\+\+\+!;
7253                 }
7254                 local $/ = undef;
7255                 print <$fd>;
7256                 close $fd;
7257         }
7258 }
7259
7260 sub git_blobdiff_plain {
7261         git_blobdiff('plain');
7262 }
7263
7264 # assumes that it is added as later part of already existing navigation,
7265 # so it returns "| foo | bar" rather than just "foo | bar"
7266 sub diff_style_nav {
7267         my ($diff_style, $is_combined) = @_;
7268         $diff_style ||= 'inline';
7269
7270         return "" if ($is_combined);
7271
7272         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7273         my %styles = @styles;
7274         @styles =
7275                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7276
7277         return join '',
7278                 map { " | ".$_ }
7279                 map {
7280                         $_ eq $diff_style ? $styles{$_} :
7281                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7282                 } @styles;
7283 }
7284
7285 sub git_commitdiff {
7286         my %params = @_;
7287         my $format = $params{-format} || 'html';
7288         my $diff_style = $input_params{'diff_style'} || 'inline';
7289
7290         my ($patch_max) = gitweb_get_feature('patches');
7291         if ($format eq 'patch') {
7292                 die_error(403, "Patch view not allowed") unless $patch_max;
7293         }
7294
7295         $hash ||= $hash_base || "HEAD";
7296         my %co = parse_commit($hash)
7297             or die_error(404, "Unknown commit object");
7298
7299         # choose format for commitdiff for merge
7300         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7301                 $hash_parent = '--cc';
7302         }
7303         # we need to prepare $formats_nav before almost any parameter munging
7304         my $formats_nav;
7305         if ($format eq 'html') {
7306                 $formats_nav =
7307                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7308                                 "raw");
7309                 if ($patch_max && @{$co{'parents'}} <= 1) {
7310                         $formats_nav .= " | " .
7311                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7312                                         "patch");
7313                 }
7314                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7315
7316                 if (defined $hash_parent &&
7317                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7318                         # commitdiff with two commits given
7319                         my $hash_parent_short = $hash_parent;
7320                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7321                                 $hash_parent_short = substr($hash_parent, 0, 7);
7322                         }
7323                         $formats_nav .=
7324                                 ' (from';
7325                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7326                                 if ($co{'parents'}[$i] eq $hash_parent) {
7327                                         $formats_nav .= ' parent ' . ($i+1);
7328                                         last;
7329                                 }
7330                         }
7331                         $formats_nav .= ': ' .
7332                                 $cgi->a({-href => href(-replay=>1,
7333                                                        hash=>$hash_parent, hash_base=>undef)},
7334                                         esc_html($hash_parent_short)) .
7335                                 ')';
7336                 } elsif (!$co{'parent'}) {
7337                         # --root commitdiff
7338                         $formats_nav .= ' (initial)';
7339                 } elsif (scalar @{$co{'parents'}} == 1) {
7340                         # single parent commit
7341                         $formats_nav .=
7342                                 ' (parent: ' .
7343                                 $cgi->a({-href => href(-replay=>1,
7344                                                        hash=>$co{'parent'}, hash_base=>undef)},
7345                                         esc_html(substr($co{'parent'}, 0, 7))) .
7346                                 ')';
7347                 } else {
7348                         # merge commit
7349                         if ($hash_parent eq '--cc') {
7350                                 $formats_nav .= ' | ' .
7351                                         $cgi->a({-href => href(-replay=>1,
7352                                                                hash=>$hash, hash_parent=>'-c')},
7353                                                 'combined');
7354                         } else { # $hash_parent eq '-c'
7355                                 $formats_nav .= ' | ' .
7356                                         $cgi->a({-href => href(-replay=>1,
7357                                                                hash=>$hash, hash_parent=>'--cc')},
7358                                                 'compact');
7359                         }
7360                         $formats_nav .=
7361                                 ' (merge: ' .
7362                                 join(' ', map {
7363                                         $cgi->a({-href => href(-replay=>1,
7364                                                                hash=>$_, hash_base=>undef)},
7365                                                 esc_html(substr($_, 0, 7)));
7366                                 } @{$co{'parents'}} ) .
7367                                 ')';
7368                 }
7369         }
7370
7371         my $hash_parent_param = $hash_parent;
7372         if (!defined $hash_parent_param) {
7373                 # --cc for multiple parents, --root for parentless
7374                 $hash_parent_param =
7375                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7376         }
7377
7378         # read commitdiff
7379         my $fd;
7380         my @difftree;
7381         if ($format eq 'html') {
7382                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7383                         "--no-commit-id", "--patch-with-raw", "--full-index",
7384                         $hash_parent_param, $hash, "--"
7385                         or die_error(500, "Open git-diff-tree failed");
7386
7387                 while (my $line = <$fd>) {
7388                         chomp $line;
7389                         # empty line ends raw part of diff-tree output
7390                         last unless $line;
7391                         push @difftree, scalar parse_difftree_raw_line($line);
7392                 }
7393
7394         } elsif ($format eq 'plain') {
7395                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7396                         '-p', $hash_parent_param, $hash, "--"
7397                         or die_error(500, "Open git-diff-tree failed");
7398         } elsif ($format eq 'patch') {
7399                 # For commit ranges, we limit the output to the number of
7400                 # patches specified in the 'patches' feature.
7401                 # For single commits, we limit the output to a single patch,
7402                 # diverging from the git-format-patch default.
7403                 my @commit_spec = ();
7404                 if ($hash_parent) {
7405                         if ($patch_max > 0) {
7406                                 push @commit_spec, "-$patch_max";
7407                         }
7408                         push @commit_spec, '-n', "$hash_parent..$hash";
7409                 } else {
7410                         if ($params{-single}) {
7411                                 push @commit_spec, '-1';
7412                         } else {
7413                                 if ($patch_max > 0) {
7414                                         push @commit_spec, "-$patch_max";
7415                                 }
7416                                 push @commit_spec, "-n";
7417                         }
7418                         push @commit_spec, '--root', $hash;
7419                 }
7420                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7421                         '--encoding=utf8', '--stdout', @commit_spec
7422                         or die_error(500, "Open git-format-patch failed");
7423         } else {
7424                 die_error(400, "Unknown commitdiff format");
7425         }
7426
7427         # non-textual hash id's can be cached
7428         my $expires;
7429         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7430                 $expires = "+1d";
7431         }
7432
7433         # write commit message
7434         if ($format eq 'html') {
7435                 my $refs = git_get_references();
7436                 my $ref = format_ref_marker($refs, $co{'id'});
7437
7438                 git_header_html(undef, $expires);
7439                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7440                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7441                 print "<div class=\"title_text\">\n" .
7442                       "<table class=\"object_header\">\n";
7443                 git_print_authorship_rows(\%co);
7444                 print "</table>".
7445                       "</div>\n";
7446                 print "<div class=\"page_body\">\n";
7447                 if (@{$co{'comment'}} > 1) {
7448                         print "<div class=\"log\">\n";
7449                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7450                         print "</div>\n"; # class="log"
7451                 }
7452
7453         } elsif ($format eq 'plain') {
7454                 my $refs = git_get_references("tags");
7455                 my $tagname = git_get_rev_name_tags($hash);
7456                 my $filename = basename($project) . "-$hash.patch";
7457
7458                 print $cgi->header(
7459                         -type => 'text/plain',
7460                         -charset => 'utf-8',
7461                         -expires => $expires,
7462                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7463                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7464                 print "From: " . to_utf8($co{'author'}) . "\n";
7465                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7466                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7467
7468                 print "X-Git-Tag: $tagname\n" if $tagname;
7469                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7470
7471                 foreach my $line (@{$co{'comment'}}) {
7472                         print to_utf8($line) . "\n";
7473                 }
7474                 print "---\n\n";
7475         } elsif ($format eq 'patch') {
7476                 my $filename = basename($project) . "-$hash.patch";
7477
7478                 print $cgi->header(
7479                         -type => 'text/plain',
7480                         -charset => 'utf-8',
7481                         -expires => $expires,
7482                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7483         }
7484
7485         # write patch
7486         if ($format eq 'html') {
7487                 my $use_parents = !defined $hash_parent ||
7488                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7489                 git_difftree_body(\@difftree, $hash,
7490                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7491                 print "<br/>\n";
7492
7493                 git_patchset_body($fd, $diff_style,
7494                                   \@difftree, $hash,
7495                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7496                 close $fd;
7497                 print "</div>\n"; # class="page_body"
7498                 git_footer_html();
7499
7500         } elsif ($format eq 'plain') {
7501                 local $/ = undef;
7502                 print <$fd>;
7503                 close $fd
7504                         or print "Reading git-diff-tree failed\n";
7505         } elsif ($format eq 'patch') {
7506                 local $/ = undef;
7507                 print <$fd>;
7508                 close $fd
7509                         or print "Reading git-format-patch failed\n";
7510         }
7511 }
7512
7513 sub git_commitdiff_plain {
7514         git_commitdiff(-format => 'plain');
7515 }
7516
7517 # format-patch-style patches
7518 sub git_patch {
7519         git_commitdiff(-format => 'patch', -single => 1);
7520 }
7521
7522 sub git_patches {
7523         git_commitdiff(-format => 'patch');
7524 }
7525
7526 sub git_history {
7527         git_log_generic('history', \&git_history_body,
7528                         $hash_base, $hash_parent_base,
7529                         $file_name, $hash);
7530 }
7531
7532 sub git_search {
7533         $searchtype ||= 'commit';
7534
7535         # check if appropriate features are enabled
7536         gitweb_check_feature('search')
7537                 or die_error(403, "Search is disabled");
7538         if ($searchtype eq 'pickaxe') {
7539                 # pickaxe may take all resources of your box and run for several minutes
7540                 # with every query - so decide by yourself how public you make this feature
7541                 gitweb_check_feature('pickaxe')
7542                         or die_error(403, "Pickaxe search is disabled");
7543         }
7544         if ($searchtype eq 'grep') {
7545                 # grep search might be potentially CPU-intensive, too
7546                 gitweb_check_feature('grep')
7547                         or die_error(403, "Grep search is disabled");
7548         }
7549
7550         if (!defined $searchtext) {
7551                 die_error(400, "Text field is empty");
7552         }
7553         if (!defined $hash) {
7554                 $hash = git_get_head_hash($project);
7555         }
7556         my %co = parse_commit($hash);
7557         if (!%co) {
7558                 die_error(404, "Unknown commit object");
7559         }
7560         if (!defined $page) {
7561                 $page = 0;
7562         }
7563
7564         if ($searchtype eq 'commit' ||
7565             $searchtype eq 'author' ||
7566             $searchtype eq 'committer') {
7567                 git_search_message(%co);
7568         } elsif ($searchtype eq 'pickaxe') {
7569                 git_search_changes(%co);
7570         } elsif ($searchtype eq 'grep') {
7571                 git_search_files(%co);
7572         } else {
7573                 die_error(400, "Unknown search type");
7574         }
7575 }
7576
7577 sub git_search_help {
7578         git_header_html();
7579         git_print_page_nav('','', $hash,$hash,$hash);
7580         print <<EOT;
7581 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7582 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7583 the pattern entered is recognized as the POSIX extended
7584 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7585 insensitive).</p>
7586 <dl>
7587 <dt><b>commit</b></dt>
7588 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7589 EOT
7590         my $have_grep = gitweb_check_feature('grep');
7591         if ($have_grep) {
7592                 print <<EOT;
7593 <dt><b>grep</b></dt>
7594 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7595     a different one) are searched for the given pattern. On large trees, this search can take
7596 a while and put some strain on the server, so please use it with some consideration. Note that
7597 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7598 case-sensitive.</dd>
7599 EOT
7600         }
7601         print <<EOT;
7602 <dt><b>author</b></dt>
7603 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7604 <dt><b>committer</b></dt>
7605 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7606 EOT
7607         my $have_pickaxe = gitweb_check_feature('pickaxe');
7608         if ($have_pickaxe) {
7609                 print <<EOT;
7610 <dt><b>pickaxe</b></dt>
7611 <dd>All commits that caused the string to appear or disappear from any file (changes that
7612 added, removed or "modified" the string) will be listed. This search can take a while and
7613 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7614 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7615 EOT
7616         }
7617         print "</dl>\n";
7618         git_footer_html();
7619 }
7620
7621 sub git_shortlog {
7622         git_log_generic('shortlog', \&git_shortlog_body,
7623                         $hash, $hash_parent);
7624 }
7625
7626 ## ......................................................................
7627 ## feeds (RSS, Atom; OPML)
7628
7629 sub git_feed {
7630         my $format = shift || 'atom';
7631         my $have_blame = gitweb_check_feature('blame');
7632
7633         # Atom: http://www.atomenabled.org/developers/syndication/
7634         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7635         if ($format ne 'rss' && $format ne 'atom') {
7636                 die_error(400, "Unknown web feed format");
7637         }
7638
7639         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7640         my $head = $hash || 'HEAD';
7641         my @commitlist = parse_commits($head, 150, 0, $file_name);
7642
7643         my %latest_commit;
7644         my %latest_date;
7645         my $content_type = "application/$format+xml";
7646         if (defined $cgi->http('HTTP_ACCEPT') &&
7647                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7648                 # browser (feed reader) prefers text/xml
7649                 $content_type = 'text/xml';
7650         }
7651         if (defined($commitlist[0])) {
7652                 %latest_commit = %{$commitlist[0]};
7653                 my $latest_epoch = $latest_commit{'committer_epoch'};
7654                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7655                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7656                 if (defined $if_modified) {
7657                         my $since;
7658                         if (eval { require HTTP::Date; 1; }) {
7659                                 $since = HTTP::Date::str2time($if_modified);
7660                         } elsif (eval { require Time::ParseDate; 1; }) {
7661                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7662                         }
7663                         if (defined $since && $latest_epoch <= $since) {
7664                                 print $cgi->header(
7665                                         -type => $content_type,
7666                                         -charset => 'utf-8',
7667                                         -last_modified => $latest_date{'rfc2822'},
7668                                         -status => '304 Not Modified');
7669                                 return;
7670                         }
7671                 }
7672                 print $cgi->header(
7673                         -type => $content_type,
7674                         -charset => 'utf-8',
7675                         -last_modified => $latest_date{'rfc2822'});
7676         } else {
7677                 print $cgi->header(
7678                         -type => $content_type,
7679                         -charset => 'utf-8');
7680         }
7681
7682         # Optimization: skip generating the body if client asks only
7683         # for Last-Modified date.
7684         return if ($cgi->request_method() eq 'HEAD');
7685
7686         # header variables
7687         my $title = "$site_name - $project/$action";
7688         my $feed_type = 'log';
7689         if (defined $hash) {
7690                 $title .= " - '$hash'";
7691                 $feed_type = 'branch log';
7692                 if (defined $file_name) {
7693                         $title .= " :: $file_name";
7694                         $feed_type = 'history';
7695                 }
7696         } elsif (defined $file_name) {
7697                 $title .= " - $file_name";
7698                 $feed_type = 'history';
7699         }
7700         $title .= " $feed_type";
7701         my $descr = git_get_project_description($project);
7702         if (defined $descr) {
7703                 $descr = esc_html($descr);
7704         } else {
7705                 $descr = "$project " .
7706                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7707                          " feed";
7708         }
7709         my $owner = git_get_project_owner($project);
7710         $owner = esc_html($owner);
7711
7712         #header
7713         my $alt_url;
7714         if (defined $file_name) {
7715                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7716         } elsif (defined $hash) {
7717                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7718         } else {
7719                 $alt_url = href(-full=>1, action=>"summary");
7720         }
7721         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7722         if ($format eq 'rss') {
7723                 print <<XML;
7724 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7725 <channel>
7726 XML
7727                 print "<title>$title</title>\n" .
7728                       "<link>$alt_url</link>\n" .
7729                       "<description>$descr</description>\n" .
7730                       "<language>en</language>\n" .
7731                       # project owner is responsible for 'editorial' content
7732                       "<managingEditor>$owner</managingEditor>\n";
7733                 if (defined $logo || defined $favicon) {
7734                         # prefer the logo to the favicon, since RSS
7735                         # doesn't allow both
7736                         my $img = esc_url($logo || $favicon);
7737                         print "<image>\n" .
7738                               "<url>$img</url>\n" .
7739                               "<title>$title</title>\n" .
7740                               "<link>$alt_url</link>\n" .
7741                               "</image>\n";
7742                 }
7743                 if (%latest_date) {
7744                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7745                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7746                 }
7747                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7748         } elsif ($format eq 'atom') {
7749                 print <<XML;
7750 <feed xmlns="http://www.w3.org/2005/Atom">
7751 XML
7752                 print "<title>$title</title>\n" .
7753                       "<subtitle>$descr</subtitle>\n" .
7754                       '<link rel="alternate" type="text/html" href="' .
7755                       $alt_url . '" />' . "\n" .
7756                       '<link rel="self" type="' . $content_type . '" href="' .
7757                       $cgi->self_url() . '" />' . "\n" .
7758                       "<id>" . href(-full=>1) . "</id>\n" .
7759                       # use project owner for feed author
7760                       "<author><name>$owner</name></author>\n";
7761                 if (defined $favicon) {
7762                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7763                 }
7764                 if (defined $logo) {
7765                         # not twice as wide as tall: 72 x 27 pixels
7766                         print "<logo>" . esc_url($logo) . "</logo>\n";
7767                 }
7768                 if (! %latest_date) {
7769                         # dummy date to keep the feed valid until commits trickle in:
7770                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7771                 } else {
7772                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7773                 }
7774                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7775         }
7776
7777         # contents
7778         for (my $i = 0; $i <= $#commitlist; $i++) {
7779                 my %co = %{$commitlist[$i]};
7780                 my $commit = $co{'id'};
7781                 # we read 150, we always show 30 and the ones more recent than 48 hours
7782                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7783                         last;
7784                 }
7785                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7786
7787                 # get list of changed files
7788                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7789                         $co{'parent'} || "--root",
7790                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7791                         or next;
7792                 my @difftree = map { chomp; $_ } <$fd>;
7793                 close $fd
7794                         or next;
7795
7796                 # print element (entry, item)
7797                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7798                 if ($format eq 'rss') {
7799                         print "<item>\n" .
7800                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7801                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7802                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7803                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7804                               "<link>$co_url</link>\n" .
7805                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7806                               "<content:encoded>" .
7807                               "<![CDATA[\n";
7808                 } elsif ($format eq 'atom') {
7809                         print "<entry>\n" .
7810                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7811                               "<updated>$cd{'iso-8601'}</updated>\n" .
7812                               "<author>\n" .
7813                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7814                         if ($co{'author_email'}) {
7815                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7816                         }
7817                         print "</author>\n" .
7818                               # use committer for contributor
7819                               "<contributor>\n" .
7820                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7821                         if ($co{'committer_email'}) {
7822                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7823                         }
7824                         print "</contributor>\n" .
7825                               "<published>$cd{'iso-8601'}</published>\n" .
7826                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7827                               "<id>$co_url</id>\n" .
7828                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7829                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7830                 }
7831                 my $comment = $co{'comment'};
7832                 print "<pre>\n";
7833                 foreach my $line (@$comment) {
7834                         $line = esc_html($line);
7835                         print "$line\n";
7836                 }
7837                 print "</pre><ul>\n";
7838                 foreach my $difftree_line (@difftree) {
7839                         my %difftree = parse_difftree_raw_line($difftree_line);
7840                         next if !$difftree{'from_id'};
7841
7842                         my $file = $difftree{'file'} || $difftree{'to_file'};
7843
7844                         print "<li>" .
7845                               "[" .
7846                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7847                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7848                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7849                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7850                                       -title => "diff"}, 'D');
7851                         if ($have_blame) {
7852                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7853                                                              file_name=>$file, hash_base=>$commit),
7854                                               -title => "blame"}, 'B');
7855                         }
7856                         # if this is not a feed of a file history
7857                         if (!defined $file_name || $file_name ne $file) {
7858                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7859                                                              file_name=>$file, hash=>$commit),
7860                                               -title => "history"}, 'H');
7861                         }
7862                         $file = esc_path($file);
7863                         print "] ".
7864                               "$file</li>\n";
7865                 }
7866                 if ($format eq 'rss') {
7867                         print "</ul>]]>\n" .
7868                               "</content:encoded>\n" .
7869                               "</item>\n";
7870                 } elsif ($format eq 'atom') {
7871                         print "</ul>\n</div>\n" .
7872                               "</content>\n" .
7873                               "</entry>\n";
7874                 }
7875         }
7876
7877         # end of feed
7878         if ($format eq 'rss') {
7879                 print "</channel>\n</rss>\n";
7880         } elsif ($format eq 'atom') {
7881                 print "</feed>\n";
7882         }
7883 }
7884
7885 sub git_rss {
7886         git_feed('rss');
7887 }
7888
7889 sub git_atom {
7890         git_feed('atom');
7891 }
7892
7893 sub git_opml {
7894         my @list = git_get_projects_list($project_filter, $strict_export);
7895         if (!@list) {
7896                 die_error(404, "No projects found");
7897         }
7898
7899         print $cgi->header(
7900                 -type => 'text/xml',
7901                 -charset => 'utf-8',
7902                 -content_disposition => 'inline; filename="opml.xml"');
7903
7904         my $title = esc_html($site_name);
7905         my $filter = " within subdirectory ";
7906         if (defined $project_filter) {
7907                 $filter .= esc_html($project_filter);
7908         } else {
7909                 $filter = "";
7910         }
7911         print <<XML;
7912 <?xml version="1.0" encoding="utf-8"?>
7913 <opml version="1.0">
7914 <head>
7915   <title>$title OPML Export$filter</title>
7916 </head>
7917 <body>
7918 <outline text="git RSS feeds">
7919 XML
7920
7921         foreach my $pr (@list) {
7922                 my %proj = %$pr;
7923                 my $head = git_get_head_hash($proj{'path'});
7924                 if (!defined $head) {
7925                         next;
7926                 }
7927                 $git_dir = "$projectroot/$proj{'path'}";
7928                 my %co = parse_commit($head);
7929                 if (!%co) {
7930                         next;
7931                 }
7932
7933                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7934                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7935                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7936                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7937         }
7938         print <<XML;
7939 </outline>
7940 </body>
7941 </opml>
7942 XML
7943 }