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         # this must be last entry (for manipulation from JavaScript)
 764         javascript => "js"
 765 );
 766 our %cgi_param_mapping = @cgi_param_mapping;
 767
 768 # we will also need to know the possible actions, for validation
 769 our %actions = (
 770         "blame" => \&git_blame,
 771         "blame_incremental" => \&git_blame_incremental,
 772         "blame_data" => \&git_blame_data,
 773         "blobdiff" => \&git_blobdiff,
 774         "blobdiff_plain" => \&git_blobdiff_plain,
 775         "blob" => \&git_blob,
 776         "blob_plain" => \&git_blob_plain,
 777         "commitdiff" => \&git_commitdiff,
 778         "commitdiff_plain" => \&git_commitdiff_plain,
 779         "commit" => \&git_commit,
 780         "forks" => \&git_forks,
 781         "heads" => \&git_heads,
 782         "history" => \&git_history,
 783         "log" => \&git_log,
 784         "patch" => \&git_patch,
 785         "patches" => \&git_patches,
 786         "remotes" => \&git_remotes,
 787         "rss" => \&git_rss,
 788         "atom" => \&git_atom,
 789         "search" => \&git_search,
 790         "search_help" => \&git_search_help,
 791         "shortlog" => \&git_shortlog,
 792         "summary" => \&git_summary,
 793         "tag" => \&git_tag,
 794         "tags" => \&git_tags,
 795         "tree" => \&git_tree,
 796         "snapshot" => \&git_snapshot,
 797         "object" => \&git_object,
 798         # those below don't need $project
 799         "opml" => \&git_opml,
 800         "project_list" => \&git_project_list,
 801         "project_index" => \&git_project_index,
 802 );
 803
 804 # finally, we have the hash of allowed extra_options for the commands that
 805 # allow them
 806 our %allowed_options = (
 807         "--no-merges" => [ qw(rss atom log shortlog history) ],
 808 );
 809
 810 # fill %input_params with the CGI parameters. All values except for 'opt'
 811 # should be single values, but opt can be an array. We should probably
 812 # build an array of parameters that can be multi-valued, but since for the time
 813 # being it's only this one, we just single it out
 814 sub evaluate_query_params {
 815         our $cgi;
 816
 817         while (my ($name, $symbol) = each %cgi_param_mapping) {
 818                 if ($symbol eq 'opt') {
 819                         $input_params{$name} = [ $cgi->param($symbol) ];
 820                 } else {
 821                         $input_params{$name} = $cgi->param($symbol);
 822                 }
 823         }
 824 }
 825
 826 # now read PATH_INFO and update the parameter list for missing parameters
 827 sub evaluate_path_info {
 828         return if defined $input_params{'project'};
 829         return if !$path_info;
 830         $path_info =~ s,^/+,,;
 831         return if !$path_info;
 832
 833         # find which part of PATH_INFO is project
 834         my $project = $path_info;
 835         $project =~ s,/+$,,;
 836         while ($project && !check_head_link("$projectroot/$project")) {
 837                 $project =~ s,/*[^/]*$,,;
 838         }
 839         return unless $project;
 840         $input_params{'project'} = $project;
 841
 842         # do not change any parameters if an action is given using the query string
 843         return if $input_params{'action'};
 844         $path_info =~ s,^\Q$project\E/*,,;
 845
 846         # next, check if we have an action
 847         my $action = $path_info;
 848         $action =~ s,/.*$,,;
 849         if (exists $actions{$action}) {
 850                 $path_info =~ s,^$action/*,,;
 851                 $input_params{'action'} = $action;
 852         }
 853
 854         # list of actions that want hash_base instead of hash, but can have no
 855         # pathname (f) parameter
 856         my @wants_base = (
 857                 'tree',
 858                 'history',
 859         );
 860
 861         # we want to catch, among others
 862         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 863         my ($parentrefname, $parentpathname, $refname, $pathname) =
 864                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 865
 866         # first, analyze the 'current' part
 867         if (defined $pathname) {
 868                 # we got "branch:filename" or "branch:dir/"
 869                 # we could use git_get_type(branch:pathname), but:
 870                 # - it needs $git_dir
 871                 # - it does a git() call
 872                 # - the convention of terminating directories with a slash
 873                 #   makes it superfluous
 874                 # - embedding the action in the PATH_INFO would make it even
 875                 #   more superfluous
 876                 $pathname =~ s,^/+,,;
 877                 if (!$pathname || substr($pathname, -1) eq "/") {
 878                         $input_params{'action'} ||= "tree";
 879                         $pathname =~ s,/$,,;
 880                 } else {
 881                         # the default action depends on whether we had parent info
 882                         # or not
 883                         if ($parentrefname) {
 884                                 $input_params{'action'} ||= "blobdiff_plain";
 885                         } else {
 886                                 $input_params{'action'} ||= "blob_plain";
 887                         }
 888                 }
 889                 $input_params{'hash_base'} ||= $refname;
 890                 $input_params{'file_name'} ||= $pathname;
 891         } elsif (defined $refname) {
 892                 # we got "branch". In this case we have to choose if we have to
 893                 # set hash or hash_base.
 894                 #
 895                 # Most of the actions without a pathname only want hash to be
 896                 # set, except for the ones specified in @wants_base that want
 897                 # hash_base instead. It should also be noted that hand-crafted
 898                 # links having 'history' as an action and no pathname or hash
 899                 # set will fail, but that happens regardless of PATH_INFO.
 900                 if (defined $parentrefname) {
 901                         # if there is parent let the default be 'shortlog' action
 902                         # (for http://git.example.com/repo.git/A..B links); if there
 903                         # is no parent, dispatch will detect type of object and set
 904                         # action appropriately if required (if action is not set)
 905                         $input_params{'action'} ||= "shortlog";
 906                 }
 907                 if ($input_params{'action'} &&
 908                     grep { $_ eq $input_params{'action'} } @wants_base) {
 909                         $input_params{'hash_base'} ||= $refname;
 910                 } else {
 911                         $input_params{'hash'} ||= $refname;
 912                 }
 913         }
 914
 915         # next, handle the 'parent' part, if present
 916         if (defined $parentrefname) {
 917                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 918                 # someproject/blobdiff/oldrev..newrev:/filename
 919                 if ($parentpathname) {
 920                         $parentpathname =~ s,^/+,,;
 921                         $parentpathname =~ s,/$,,;
 922                         $input_params{'file_parent'} ||= $parentpathname;
 923                 } else {
 924                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 925                 }
 926                 # we assume that hash_parent_base is wanted if a path was specified,
 927                 # or if the action wants hash_base instead of hash
 928                 if (defined $input_params{'file_parent'} ||
 929                         grep { $_ eq $input_params{'action'} } @wants_base) {
 930                         $input_params{'hash_parent_base'} ||= $parentrefname;
 931                 } else {
 932                         $input_params{'hash_parent'} ||= $parentrefname;
 933                 }
 934         }
 935
 936         # for the snapshot action, we allow URLs in the form
 937         # $project/snapshot/$hash.ext
 938         # where .ext determines the snapshot and gets removed from the
 939         # passed $refname to provide the $hash.
 940         #
 941         # To be able to tell that $refname includes the format extension, we
 942         # require the following two conditions to be satisfied:
 943         # - the hash input parameter MUST have been set from the $refname part
 944         #   of the URL (i.e. they must be equal)
 945         # - the snapshot format MUST NOT have been defined already (e.g. from
 946         #   CGI parameter sf)
 947         # It's also useless to try any matching unless $refname has a dot,
 948         # so we check for that too
 949         if (defined $input_params{'action'} &&
 950                 $input_params{'action'} eq 'snapshot' &&
 951                 defined $refname && index($refname, '.') != -1 &&
 952                 $refname eq $input_params{'hash'} &&
 953                 !defined $input_params{'snapshot_format'}) {
 954                 # We loop over the known snapshot formats, checking for
 955                 # extensions. Allowed extensions are both the defined suffix
 956                 # (which includes the initial dot already) and the snapshot
 957                 # format key itself, with a prepended dot
 958                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 959                         my $hash = $refname;
 960                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 961                                 next;
 962                         }
 963                         my $sfx = $1;
 964                         # a valid suffix was found, so set the snapshot format
 965                         # and reset the hash parameter
 966                         $input_params{'snapshot_format'} = $fmt;
 967                         $input_params{'hash'} = $hash;
 968                         # we also set the format suffix to the one requested
 969                         # in the URL: this way a request for e.g. .tgz returns
 970                         # a .tgz instead of a .tar.gz
 971                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 972                         last;
 973                 }
 974         }
 975 }
 976
 977 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 978      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 979      $searchtext, $search_regexp);
 980 sub evaluate_and_validate_params {
 981         our $action = $input_params{'action'};
 982         if (defined $action) {
 983                 if (!validate_action($action)) {
 984                         die_error(400, "Invalid action parameter");
 985                 }
 986         }
 987
 988         # parameters which are pathnames
 989         our $project = $input_params{'project'};
 990         if (defined $project) {
 991                 if (!validate_project($project)) {
 992                         undef $project;
 993                         die_error(404, "No such project");
 994                 }
 995         }
 996
 997         our $file_name = $input_params{'file_name'};
 998         if (defined $file_name) {
 999                 if (!validate_pathname($file_name)) {
1000                         die_error(400, "Invalid file parameter");
1001                 }
1002         }
1003
1004         our $file_parent = $input_params{'file_parent'};
1005         if (defined $file_parent) {
1006                 if (!validate_pathname($file_parent)) {
1007                         die_error(400, "Invalid file parent parameter");
1008                 }
1009         }
1010
1011         # parameters which are refnames
1012         our $hash = $input_params{'hash'};
1013         if (defined $hash) {
1014                 if (!validate_refname($hash)) {
1015                         die_error(400, "Invalid hash parameter");
1016                 }
1017         }
1018
1019         our $hash_parent = $input_params{'hash_parent'};
1020         if (defined $hash_parent) {
1021                 if (!validate_refname($hash_parent)) {
1022                         die_error(400, "Invalid hash parent parameter");
1023                 }
1024         }
1025
1026         our $hash_base = $input_params{'hash_base'};
1027         if (defined $hash_base) {
1028                 if (!validate_refname($hash_base)) {
1029                         die_error(400, "Invalid hash base parameter");
1030                 }
1031         }
1032
1033         our @extra_options = @{$input_params{'extra_options'}};
1034         # @extra_options is always defined, since it can only be (currently) set from
1035         # CGI, and $cgi->param() returns the empty array in array context if the param
1036         # is not set
1037         foreach my $opt (@extra_options) {
1038                 if (not exists $allowed_options{$opt}) {
1039                         die_error(400, "Invalid option parameter");
1040                 }
1041                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1042                         die_error(400, "Invalid option parameter for this action");
1043                 }
1044         }
1045
1046         our $hash_parent_base = $input_params{'hash_parent_base'};
1047         if (defined $hash_parent_base) {
1048                 if (!validate_refname($hash_parent_base)) {
1049                         die_error(400, "Invalid hash parent base parameter");
1050                 }
1051         }
1052
1053         # other parameters
1054         our $page = $input_params{'page'};
1055         if (defined $page) {
1056                 if ($page =~ m/[^0-9]/) {
1057                         die_error(400, "Invalid page parameter");
1058                 }
1059         }
1060
1061         our $searchtype = $input_params{'searchtype'};
1062         if (defined $searchtype) {
1063                 if ($searchtype =~ m/[^a-z]/) {
1064                         die_error(400, "Invalid searchtype parameter");
1065                 }
1066         }
1067
1068         our $search_use_regexp = $input_params{'search_use_regexp'};
1069
1070         our $searchtext = $input_params{'searchtext'};
1071         our $search_regexp;
1072         if (defined $searchtext) {
1073                 if (length($searchtext) < 2) {
1074                         die_error(403, "At least two characters are required for search parameter");
1075                 }
1076                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1077         }
1078 }
1079
1080 # path to the current git repository
1081 our $git_dir;
1082 sub evaluate_git_dir {
1083         our $git_dir = "$projectroot/$project" if $project;
1084 }
1085
1086 our (@snapshot_fmts, $git_avatar);
1087 sub configure_gitweb_features {
1088         # list of supported snapshot formats
1089         our @snapshot_fmts = gitweb_get_feature('snapshot');
1090         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1091
1092         # check that the avatar feature is set to a known provider name,
1093         # and for each provider check if the dependencies are satisfied.
1094         # if the provider name is invalid or the dependencies are not met,
1095         # reset $git_avatar to the empty string.
1096         our ($git_avatar) = gitweb_get_feature('avatar');
1097         if ($git_avatar eq 'gravatar') {
1098                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1099         } elsif ($git_avatar eq 'picon') {
1100                 # no dependencies
1101         } else {
1102                 $git_avatar = '';
1103         }
1104 }
1105
1106 # custom error handler: 'die <message>' is Internal Server Error
1107 sub handle_errors_html {
1108         my $msg = shift; # it is already HTML escaped
1109
1110         # to avoid infinite loop where error occurs in die_error,
1111         # change handler to default handler, disabling handle_errors_html
1112         set_message("Error occured when inside die_error:\n$msg");
1113
1114         # you cannot jump out of die_error when called as error handler;
1115         # the subroutine set via CGI::Carp::set_message is called _after_
1116         # HTTP headers are already written, so it cannot write them itself
1117         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1118 }
1119 set_message(\&handle_errors_html);
1120
1121 # dispatch
1122 sub dispatch {
1123         if (!defined $action) {
1124                 if (defined $hash) {
1125                         $action = git_get_type($hash);
1126                 } elsif (defined $hash_base && defined $file_name) {
1127                         $action = git_get_type("$hash_base:$file_name");
1128                 } elsif (defined $project) {
1129                         $action = 'summary';
1130                 } else {
1131                         $action = 'project_list';
1132                 }
1133         }
1134         if (!defined($actions{$action})) {
1135                 die_error(400, "Unknown action");
1136         }
1137         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1138             !$project) {
1139                 die_error(400, "Project needed");
1140         }
1141         $actions{$action}->();
1142 }
1143
1144 sub reset_timer {
1145         our $t0 = [ gettimeofday() ]
1146                 if defined $t0;
1147         our $number_of_git_cmds = 0;
1148 }
1149
1150 our $first_request = 1;
1151 sub run_request {
1152         reset_timer();
1153
1154         evaluate_uri();
1155         if ($first_request) {
1156                 evaluate_gitweb_config();
1157                 evaluate_git_version();
1158         }
1159         if ($per_request_config) {
1160                 if (ref($per_request_config) eq 'CODE') {
1161                         $per_request_config->();
1162                 } elsif (!$first_request) {
1163                         evaluate_gitweb_config();
1164                 }
1165         }
1166         check_loadavg();
1167
1168         # $projectroot and $projects_list might be set in gitweb config file
1169         $projects_list ||= $projectroot;
1170
1171         evaluate_query_params();
1172         evaluate_path_info();
1173         evaluate_and_validate_params();
1174         evaluate_git_dir();
1175
1176         configure_gitweb_features();
1177
1178         dispatch();
1179 }
1180
1181 our $is_last_request = sub { 1 };
1182 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1183 our $CGI = 'CGI';
1184 our $cgi;
1185 sub configure_as_fcgi {
1186         require CGI::Fast;
1187         our $CGI = 'CGI::Fast';
1188
1189         my $request_number = 0;
1190         # let each child service 100 requests
1191         our $is_last_request = sub { ++$request_number > 100 };
1192 }
1193 sub evaluate_argv {
1194         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1195         configure_as_fcgi()
1196                 if $script_name =~ /\.fcgi$/;
1197
1198         return unless (@ARGV);
1199
1200         require Getopt::Long;
1201         Getopt::Long::GetOptions(
1202                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1203                 'nproc|n=i' => sub {
1204                         my ($arg, $val) = @_;
1205                         return unless eval { require FCGI::ProcManager; 1; };
1206                         my $proc_manager = FCGI::ProcManager->new({
1207                                 n_processes => $val,
1208                         });
1209                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1210                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1211                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1212                 },
1213         );
1214 }
1215
1216 sub run {
1217         evaluate_argv();
1218
1219         $first_request = 1;
1220         $pre_listen_hook->()
1221                 if $pre_listen_hook;
1222
1223  REQUEST:
1224         while ($cgi = $CGI->new()) {
1225                 $pre_dispatch_hook->()
1226                         if $pre_dispatch_hook;
1227
1228                 run_request();
1229
1230                 $post_dispatch_hook->()
1231                         if $post_dispatch_hook;
1232                 $first_request = 0;
1233
1234                 last REQUEST if ($is_last_request->());
1235         }
1236
1237  DONE_GITWEB:
1238         1;
1239 }
1240
1241 run();
1242
1243 if (defined caller) {
1244         # wrapped in a subroutine processing requests,
1245         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1246         return;
1247 } else {
1248         # pure CGI script, serving single request
1249         exit;
1250 }
1251
1252 ## ======================================================================
1253 ## action links
1254
1255 # possible values of extra options
1256 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1257 # -replay => 1      - start from a current view (replay with modifications)
1258 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1259 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1260 sub href {
1261         my %params = @_;
1262         # default is to use -absolute url() i.e. $my_uri
1263         my $href = $params{-full} ? $my_url : $my_uri;
1264
1265         # implicit -replay, must be first of implicit params
1266         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1267
1268         $params{'project'} = $project unless exists $params{'project'};
1269
1270         if ($params{-replay}) {
1271                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1272                         if (!exists $params{$name}) {
1273                                 $params{$name} = $input_params{$name};
1274                         }
1275                 }
1276         }
1277
1278         my $use_pathinfo = gitweb_check_feature('pathinfo');
1279         if (defined $params{'project'} &&
1280             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1281                 # try to put as many parameters as possible in PATH_INFO:
1282                 #   - project name
1283                 #   - action
1284                 #   - hash_parent or hash_parent_base:/file_parent
1285                 #   - hash or hash_base:/filename
1286                 #   - the snapshot_format as an appropriate suffix
1287
1288                 # When the script is the root DirectoryIndex for the domain,
1289                 # $href here would be something like http://gitweb.example.com/
1290                 # Thus, we strip any trailing / from $href, to spare us double
1291                 # slashes in the final URL
1292                 $href =~ s,/$,,;
1293
1294                 # Then add the project name, if present
1295                 $href .= "/".esc_path_info($params{'project'});
1296                 delete $params{'project'};
1297
1298                 # since we destructively absorb parameters, we keep this
1299                 # boolean that remembers if we're handling a snapshot
1300                 my $is_snapshot = $params{'action'} eq 'snapshot';
1301
1302                 # Summary just uses the project path URL, any other action is
1303                 # added to the URL
1304                 if (defined $params{'action'}) {
1305                         $href .= "/".esc_path_info($params{'action'})
1306                                 unless $params{'action'} eq 'summary';
1307                         delete $params{'action'};
1308                 }
1309
1310                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1311                 # stripping nonexistent or useless pieces
1312                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1313                         || $params{'hash_parent'} || $params{'hash'});
1314                 if (defined $params{'hash_base'}) {
1315                         if (defined $params{'hash_parent_base'}) {
1316                                 $href .= esc_path_info($params{'hash_parent_base'});
1317                                 # skip the file_parent if it's the same as the file_name
1318                                 if (defined $params{'file_parent'}) {
1319                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1320                                                 delete $params{'file_parent'};
1321                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1322                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1323                                                 delete $params{'file_parent'};
1324                                         }
1325                                 }
1326                                 $href .= "..";
1327                                 delete $params{'hash_parent'};
1328                                 delete $params{'hash_parent_base'};
1329                         } elsif (defined $params{'hash_parent'}) {
1330                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1331                                 delete $params{'hash_parent'};
1332                         }
1333
1334                         $href .= esc_path_info($params{'hash_base'});
1335                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1336                                 $href .= ":/".esc_path_info($params{'file_name'});
1337                                 delete $params{'file_name'};
1338                         }
1339                         delete $params{'hash'};
1340                         delete $params{'hash_base'};
1341                 } elsif (defined $params{'hash'}) {
1342                         $href .= esc_path_info($params{'hash'});
1343                         delete $params{'hash'};
1344                 }
1345
1346                 # If the action was a snapshot, we can absorb the
1347                 # snapshot_format parameter too
1348                 if ($is_snapshot) {
1349                         my $fmt = $params{'snapshot_format'};
1350                         # snapshot_format should always be defined when href()
1351                         # is called, but just in case some code forgets, we
1352                         # fall back to the default
1353                         $fmt ||= $snapshot_fmts[0];
1354                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1355                         delete $params{'snapshot_format'};
1356                 }
1357         }
1358
1359         # now encode the parameters explicitly
1360         my @result = ();
1361         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1362                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1363                 if (defined $params{$name}) {
1364                         if (ref($params{$name}) eq "ARRAY") {
1365                                 foreach my $par (@{$params{$name}}) {
1366                                         push @result, $symbol . "=" . esc_param($par);
1367                                 }
1368                         } else {
1369                                 push @result, $symbol . "=" . esc_param($params{$name});
1370                         }
1371                 }
1372         }
1373         $href .= "?" . join(';', @result) if scalar @result;
1374
1375         # final transformation: trailing spaces must be escaped (URI-encoded)
1376         $href =~ s/(\s+)$/CGI::escape($1)/e;
1377
1378         if ($params{-anchor}) {
1379                 $href .= "#".esc_param($params{-anchor});
1380         }
1381
1382         return $href;
1383 }
1384
1385
1386 ## ======================================================================
1387 ## validation, quoting/unquoting and escaping
1388
1389 sub validate_action {
1390         my $input = shift || return undef;
1391         return undef unless exists $actions{$input};
1392         return $input;
1393 }
1394
1395 sub validate_project {
1396         my $input = shift || return undef;
1397         if (!validate_pathname($input) ||
1398                 !(-d "$projectroot/$input") ||
1399                 !check_export_ok("$projectroot/$input") ||
1400                 ($strict_export && !project_in_list($input))) {
1401                 return undef;
1402         } else {
1403                 return $input;
1404         }
1405 }
1406
1407 sub validate_pathname {
1408         my $input = shift || return undef;
1409
1410         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1411         # at the beginning, at the end, and between slashes.
1412         # also this catches doubled slashes
1413         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1414                 return undef;
1415         }
1416         # no null characters
1417         if ($input =~ m!\0!) {
1418                 return undef;
1419         }
1420         return $input;
1421 }
1422
1423 sub validate_refname {
1424         my $input = shift || return undef;
1425
1426         # textual hashes are O.K.
1427         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1428                 return $input;
1429         }
1430         # it must be correct pathname
1431         $input = validate_pathname($input)
1432                 or return undef;
1433         # restrictions on ref name according to git-check-ref-format
1434         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1435                 return undef;
1436         }
1437         return $input;
1438 }
1439
1440 # decode sequences of octets in utf8 into Perl's internal form,
1441 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1442 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1443 sub to_utf8 {
1444         my $str = shift;
1445         return undef unless defined $str;
1446
1447         if (utf8::is_utf8($str) || utf8::decode($str)) {
1448                 return $str;
1449         } else {
1450                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1451         }
1452 }
1453
1454 # quote unsafe chars, but keep the slash, even when it's not
1455 # correct, but quoted slashes look too horrible in bookmarks
1456 sub esc_param {
1457         my $str = shift;
1458         return undef unless defined $str;
1459         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1460         $str =~ s/ /\+/g;
1461         return $str;
1462 }
1463
1464 # the quoting rules for path_info fragment are slightly different
1465 sub esc_path_info {
1466         my $str = shift;
1467         return undef unless defined $str;
1468
1469         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1470         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1471
1472         return $str;
1473 }
1474
1475 # quote unsafe chars in whole URL, so some characters cannot be quoted
1476 sub esc_url {
1477         my $str = shift;
1478         return undef unless defined $str;
1479         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1480         $str =~ s/ /\+/g;
1481         return $str;
1482 }
1483
1484 # quote unsafe characters in HTML attributes
1485 sub esc_attr {
1486
1487         # for XHTML conformance escaping '"' to '&quot;' is not enough
1488         return esc_html(@_);
1489 }
1490
1491 # replace invalid utf8 character with SUBSTITUTION sequence
1492 sub esc_html {
1493         my $str = shift;
1494         my %opts = @_;
1495
1496         return undef unless defined $str;
1497
1498         $str = to_utf8($str);
1499         $str = $cgi->escapeHTML($str);
1500         if ($opts{'-nbsp'}) {
1501                 $str =~ s/ /&nbsp;/g;
1502         }
1503         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1504         return $str;
1505 }
1506
1507 # quote control characters and escape filename to HTML
1508 sub esc_path {
1509         my $str = shift;
1510         my %opts = @_;
1511
1512         return undef unless defined $str;
1513
1514         $str = to_utf8($str);
1515         $str = $cgi->escapeHTML($str);
1516         if ($opts{'-nbsp'}) {
1517                 $str =~ s/ /&nbsp;/g;
1518         }
1519         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1520         return $str;
1521 }
1522
1523 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1524 sub sanitize {
1525         my $str = shift;
1526
1527         return undef unless defined $str;
1528
1529         $str = to_utf8($str);
1530         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1531         return $str;
1532 }
1533
1534 # Make control characters "printable", using character escape codes (CEC)
1535 sub quot_cec {
1536         my $cntrl = shift;
1537         my %opts = @_;
1538         my %es = ( # character escape codes, aka escape sequences
1539                 "\t" => '\t',   # tab            (HT)
1540                 "\n" => '\n',   # line feed      (LF)
1541                 "\r" => '\r',   # carrige return (CR)
1542                 "\f" => '\f',   # form feed      (FF)
1543                 "\b" => '\b',   # backspace      (BS)
1544                 "\a" => '\a',   # alarm (bell)   (BEL)
1545                 "\e" => '\e',   # escape         (ESC)
1546                 "\013" => '\v', # vertical tab   (VT)
1547                 "\000" => '\0', # nul character  (NUL)
1548         );
1549         my $chr = ( (exists $es{$cntrl})
1550                     ? $es{$cntrl}
1551                     : sprintf('\%2x', ord($cntrl)) );
1552         if ($opts{-nohtml}) {
1553                 return $chr;
1554         } else {
1555                 return "<span class=\"cntrl\">$chr</span>";
1556         }
1557 }
1558
1559 # Alternatively use unicode control pictures codepoints,
1560 # Unicode "printable representation" (PR)
1561 sub quot_upr {
1562         my $cntrl = shift;
1563         my %opts = @_;
1564
1565         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1566         if ($opts{-nohtml}) {
1567                 return $chr;
1568         } else {
1569                 return "<span class=\"cntrl\">$chr</span>";
1570         }
1571 }
1572
1573 # git may return quoted and escaped filenames
1574 sub unquote {
1575         my $str = shift;
1576
1577         sub unq {
1578                 my $seq = shift;
1579                 my %es = ( # character escape codes, aka escape sequences
1580                         't' => "\t",   # tab            (HT, TAB)
1581                         'n' => "\n",   # newline        (NL)
1582                         'r' => "\r",   # return         (CR)
1583                         'f' => "\f",   # form feed      (FF)
1584                         'b' => "\b",   # backspace      (BS)
1585                         'a' => "\a",   # alarm (bell)   (BEL)
1586                         'e' => "\e",   # escape         (ESC)
1587                         'v' => "\013", # vertical tab   (VT)
1588                 );
1589
1590                 if ($seq =~ m/^[0-7]{1,3}$/) {
1591                         # octal char sequence
1592                         return chr(oct($seq));
1593                 } elsif (exists $es{$seq}) {
1594                         # C escape sequence, aka character escape code
1595                         return $es{$seq};
1596                 }
1597                 # quoted ordinary character
1598                 return $seq;
1599         }
1600
1601         if ($str =~ m/^"(.*)"$/) {
1602                 # needs unquoting
1603                 $str = $1;
1604                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1605         }
1606         return $str;
1607 }
1608
1609 # escape tabs (convert tabs to spaces)
1610 sub untabify {
1611         my $line = shift;
1612
1613         while ((my $pos = index($line, "\t")) != -1) {
1614                 if (my $count = (8 - ($pos % 8))) {
1615                         my $spaces = ' ' x $count;
1616                         $line =~ s/\t/$spaces/;
1617                 }
1618         }
1619
1620         return $line;
1621 }
1622
1623 sub project_in_list {
1624         my $project = shift;
1625         my @list = git_get_projects_list();
1626         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1627 }
1628
1629 ## ----------------------------------------------------------------------
1630 ## HTML aware string manipulation
1631
1632 # Try to chop given string on a word boundary between position
1633 # $len and $len+$add_len. If there is no word boundary there,
1634 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1635 # (marking chopped part) would be longer than given string.
1636 sub chop_str {
1637         my $str = shift;
1638         my $len = shift;
1639         my $add_len = shift || 10;
1640         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1641
1642         # Make sure perl knows it is utf8 encoded so we don't
1643         # cut in the middle of a utf8 multibyte char.
1644         $str = to_utf8($str);
1645
1646         # allow only $len chars, but don't cut a word if it would fit in $add_len
1647         # if it doesn't fit, cut it if it's still longer than the dots we would add
1648         # remove chopped character entities entirely
1649
1650         # when chopping in the middle, distribute $len into left and right part
1651         # return early if chopping wouldn't make string shorter
1652         if ($where eq 'center') {
1653                 return $str if ($len + 5 >= length($str)); # filler is length 5
1654                 $len = int($len/2);
1655         } else {
1656                 return $str if ($len + 4 >= length($str)); # filler is length 4
1657         }
1658
1659         # regexps: ending and beginning with word part up to $add_len
1660         my $endre = qr/.{$len}\w{0,$add_len}/;
1661         my $begre = qr/\w{0,$add_len}.{$len}/;
1662
1663         if ($where eq 'left') {
1664                 $str =~ m/^(.*?)($begre)$/;
1665                 my ($lead, $body) = ($1, $2);
1666                 if (length($lead) > 4) {
1667                         $lead = " ...";
1668                 }
1669                 return "$lead$body";
1670
1671         } elsif ($where eq 'center') {
1672                 $str =~ m/^($endre)(.*)$/;
1673                 my ($left, $str)  = ($1, $2);
1674                 $str =~ m/^(.*?)($begre)$/;
1675                 my ($mid, $right) = ($1, $2);
1676                 if (length($mid) > 5) {
1677                         $mid = " ... ";
1678                 }
1679                 return "$left$mid$right";
1680
1681         } else {
1682                 $str =~ m/^($endre)(.*)$/;
1683                 my $body = $1;
1684                 my $tail = $2;
1685                 if (length($tail) > 4) {
1686                         $tail = "... ";
1687                 }
1688                 return "$body$tail";
1689         }
1690 }
1691
1692 # takes the same arguments as chop_str, but also wraps a <span> around the
1693 # result with a title attribute if it does get chopped. Additionally, the
1694 # string is HTML-escaped.
1695 sub chop_and_escape_str {
1696         my ($str) = @_;
1697
1698         my $chopped = chop_str(@_);
1699         $str = to_utf8($str);
1700         if ($chopped eq $str) {
1701                 return esc_html($chopped);
1702         } else {
1703                 $str =~ s/[[:cntrl:]]/?/g;
1704                 return $cgi->span({-title=>$str}, esc_html($chopped));
1705         }
1706 }
1707
1708 ## ----------------------------------------------------------------------
1709 ## functions returning short strings
1710
1711 # CSS class for given age value (in seconds)
1712 sub age_class {
1713         my $age = shift;
1714
1715         if (!defined $age) {
1716                 return "noage";
1717         } elsif ($age < 60*60*2) {
1718                 return "age0";
1719         } elsif ($age < 60*60*24*2) {
1720                 return "age1";
1721         } else {
1722                 return "age2";
1723         }
1724 }
1725
1726 # convert age in seconds to "nn units ago" string
1727 sub age_string {
1728         my $age = shift;
1729         my $age_str;
1730
1731         if ($age > 60*60*24*365*2) {
1732                 $age_str = (int $age/60/60/24/365);
1733                 $age_str .= " years ago";
1734         } elsif ($age > 60*60*24*(365/12)*2) {
1735                 $age_str = int $age/60/60/24/(365/12);
1736                 $age_str .= " months ago";
1737         } elsif ($age > 60*60*24*7*2) {
1738                 $age_str = int $age/60/60/24/7;
1739                 $age_str .= " weeks ago";
1740         } elsif ($age > 60*60*24*2) {
1741                 $age_str = int $age/60/60/24;
1742                 $age_str .= " days ago";
1743         } elsif ($age > 60*60*2) {
1744                 $age_str = int $age/60/60;
1745                 $age_str .= " hours ago";
1746         } elsif ($age > 60*2) {
1747                 $age_str = int $age/60;
1748                 $age_str .= " min ago";
1749         } elsif ($age > 2) {
1750                 $age_str = int $age;
1751                 $age_str .= " sec ago";
1752         } else {
1753                 $age_str .= " right now";
1754         }
1755         return $age_str;
1756 }
1757
1758 use constant {
1759         S_IFINVALID => 0030000,
1760         S_IFGITLINK => 0160000,
1761 };
1762
1763 # submodule/subproject, a commit object reference
1764 sub S_ISGITLINK {
1765         my $mode = shift;
1766
1767         return (($mode & S_IFMT) == S_IFGITLINK)
1768 }
1769
1770 # convert file mode in octal to symbolic file mode string
1771 sub mode_str {
1772         my $mode = oct shift;
1773
1774         if (S_ISGITLINK($mode)) {
1775                 return 'm---------';
1776         } elsif (S_ISDIR($mode & S_IFMT)) {
1777                 return 'drwxr-xr-x';
1778         } elsif (S_ISLNK($mode)) {
1779                 return 'lrwxrwxrwx';
1780         } elsif (S_ISREG($mode)) {
1781                 # git cares only about the executable bit
1782                 if ($mode & S_IXUSR) {
1783                         return '-rwxr-xr-x';
1784                 } else {
1785                         return '-rw-r--r--';
1786                 };
1787         } else {
1788                 return '----------';
1789         }
1790 }
1791
1792 # convert file mode in octal to file type string
1793 sub file_type {
1794         my $mode = shift;
1795
1796         if ($mode !~ m/^[0-7]+$/) {
1797                 return $mode;
1798         } else {
1799                 $mode = oct $mode;
1800         }
1801
1802         if (S_ISGITLINK($mode)) {
1803                 return "submodule";
1804         } elsif (S_ISDIR($mode & S_IFMT)) {
1805                 return "directory";
1806         } elsif (S_ISLNK($mode)) {
1807                 return "symlink";
1808         } elsif (S_ISREG($mode)) {
1809                 return "file";
1810         } else {
1811                 return "unknown";
1812         }
1813 }
1814
1815 # convert file mode in octal to file type description string
1816 sub file_type_long {
1817         my $mode = shift;
1818
1819         if ($mode !~ m/^[0-7]+$/) {
1820                 return $mode;
1821         } else {
1822                 $mode = oct $mode;
1823         }
1824
1825         if (S_ISGITLINK($mode)) {
1826                 return "submodule";
1827         } elsif (S_ISDIR($mode & S_IFMT)) {
1828                 return "directory";
1829         } elsif (S_ISLNK($mode)) {
1830                 return "symlink";
1831         } elsif (S_ISREG($mode)) {
1832                 if ($mode & S_IXUSR) {
1833                         return "executable";
1834                 } else {
1835                         return "file";
1836                 };
1837         } else {
1838                 return "unknown";
1839         }
1840 }
1841
1842
1843 ## ----------------------------------------------------------------------
1844 ## functions returning short HTML fragments, or transforming HTML fragments
1845 ## which don't belong to other sections
1846
1847 # format line of commit message.
1848 sub format_log_line_html {
1849         my $line = shift;
1850
1851         $line = esc_html($line, -nbsp=>1);
1852         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1853                 $cgi->a({-href => href(action=>"object", hash=>$1),
1854                                         -class => "text"}, $1);
1855         }eg;
1856
1857         return $line;
1858 }
1859
1860 # format marker of refs pointing to given object
1861
1862 # the destination action is chosen based on object type and current context:
1863 # - for annotated tags, we choose the tag view unless it's the current view
1864 #   already, in which case we go to shortlog view
1865 # - for other refs, we keep the current view if we're in history, shortlog or
1866 #   log view, and select shortlog otherwise
1867 sub format_ref_marker {
1868         my ($refs, $id) = @_;
1869         my $markers = '';
1870
1871         if (defined $refs->{$id}) {
1872                 foreach my $ref (@{$refs->{$id}}) {
1873                         # this code exploits the fact that non-lightweight tags are the
1874                         # only indirect objects, and that they are the only objects for which
1875                         # we want to use tag instead of shortlog as action
1876                         my ($type, $name) = qw();
1877                         my $indirect = ($ref =~ s/\^\{\}$//);
1878                         # e.g. tags/v2.6.11 or heads/next
1879                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1880                                 $type = $1;
1881                                 $name = $2;
1882                         } else {
1883                                 $type = "ref";
1884                                 $name = $ref;
1885                         }
1886
1887                         my $class = $type;
1888                         $class .= " indirect" if $indirect;
1889
1890                         my $dest_action = "shortlog";
1891
1892                         if ($indirect) {
1893                                 $dest_action = "tag" unless $action eq "tag";
1894                         } elsif ($action =~ /^(history|(short)?log)$/) {
1895                                 $dest_action = $action;
1896                         }
1897
1898                         my $dest = "";
1899                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1900                         $dest .= $ref;
1901
1902                         my $link = $cgi->a({
1903                                 -href => href(
1904                                         action=>$dest_action,
1905                                         hash=>$dest
1906                                 )}, $name);
1907
1908                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1909                                 $link . "</span>";
1910                 }
1911         }
1912
1913         if ($markers) {
1914                 return ' <span class="refs">'. $markers . '</span>';
1915         } else {
1916                 return "";
1917         }
1918 }
1919
1920 # format, perhaps shortened and with markers, title line
1921 sub format_subject_html {
1922         my ($long, $short, $href, $extra) = @_;
1923         $extra = '' unless defined($extra);
1924
1925         if (length($short) < length($long)) {
1926                 $long =~ s/[[:cntrl:]]/?/g;
1927                 return $cgi->a({-href => $href, -class => "list subject",
1928                                 -title => to_utf8($long)},
1929                        esc_html($short)) . $extra;
1930         } else {
1931                 return $cgi->a({-href => $href, -class => "list subject"},
1932                        esc_html($long)) . $extra;
1933         }
1934 }
1935
1936 # Rather than recomputing the url for an email multiple times, we cache it
1937 # after the first hit. This gives a visible benefit in views where the avatar
1938 # for the same email is used repeatedly (e.g. shortlog).
1939 # The cache is shared by all avatar engines (currently gravatar only), which
1940 # are free to use it as preferred. Since only one avatar engine is used for any
1941 # given page, there's no risk for cache conflicts.
1942 our %avatar_cache = ();
1943
1944 # Compute the picon url for a given email, by using the picon search service over at
1945 # http://www.cs.indiana.edu/picons/search.html
1946 sub picon_url {
1947         my $email = lc shift;
1948         if (!$avatar_cache{$email}) {
1949                 my ($user, $domain) = split('@', $email);
1950                 $avatar_cache{$email} =
1951                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1952                         "$domain/$user/" .
1953                         "users+domains+unknown/up/single";
1954         }
1955         return $avatar_cache{$email};
1956 }
1957
1958 # Compute the gravatar url for a given email, if it's not in the cache already.
1959 # Gravatar stores only the part of the URL before the size, since that's the
1960 # one computationally more expensive. This also allows reuse of the cache for
1961 # different sizes (for this particular engine).
1962 sub gravatar_url {
1963         my $email = lc shift;
1964         my $size = shift;
1965         $avatar_cache{$email} ||=
1966                 "http://www.gravatar.com/avatar/" .
1967                         Digest::MD5::md5_hex($email) . "?s=";
1968         return $avatar_cache{$email} . $size;
1969 }
1970
1971 # Insert an avatar for the given $email at the given $size if the feature
1972 # is enabled.
1973 sub git_get_avatar {
1974         my ($email, %opts) = @_;
1975         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1976         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1977         $opts{-size} ||= 'default';
1978         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1979         my $url = "";
1980         if ($git_avatar eq 'gravatar') {
1981                 $url = gravatar_url($email, $size);
1982         } elsif ($git_avatar eq 'picon') {
1983                 $url = picon_url($email);
1984         }
1985         # Other providers can be added by extending the if chain, defining $url
1986         # as needed. If no variant puts something in $url, we assume avatars
1987         # are completely disabled/unavailable.
1988         if ($url) {
1989                 return $pre_white .
1990                        "<img width=\"$size\" " .
1991                             "class=\"avatar\" " .
1992                             "src=\"".esc_url($url)."\" " .
1993                             "alt=\"\" " .
1994                        "/>" . $post_white;
1995         } else {
1996                 return "";
1997         }
1998 }
1999
2000 sub format_search_author {
2001         my ($author, $searchtype, $displaytext) = @_;
2002         my $have_search = gitweb_check_feature('search');
2003
2004         if ($have_search) {
2005                 my $performed = "";
2006                 if ($searchtype eq 'author') {
2007                         $performed = "authored";
2008                 } elsif ($searchtype eq 'committer') {
2009                         $performed = "committed";
2010                 }
2011
2012                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2013                                 searchtext=>$author,
2014                                 searchtype=>$searchtype), class=>"list",
2015                                 title=>"Search for commits $performed by $author"},
2016                                 $displaytext);
2017
2018         } else {
2019                 return $displaytext;
2020         }
2021 }
2022
2023 # format the author name of the given commit with the given tag
2024 # the author name is chopped and escaped according to the other
2025 # optional parameters (see chop_str).
2026 sub format_author_html {
2027         my $tag = shift;
2028         my $co = shift;
2029         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2030         return "<$tag class=\"author\">" .
2031                format_search_author($co->{'author_name'}, "author",
2032                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2033                        $author) .
2034                "</$tag>";
2035 }
2036
2037 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2038 sub format_git_diff_header_line {
2039         my $line = shift;
2040         my $diffinfo = shift;
2041         my ($from, $to) = @_;
2042
2043         if ($diffinfo->{'nparents'}) {
2044                 # combined diff
2045                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2046                 if ($to->{'href'}) {
2047                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2048                                          esc_path($to->{'file'}));
2049                 } else { # file was deleted (no href)
2050                         $line .= esc_path($to->{'file'});
2051                 }
2052         } else {
2053                 # "ordinary" diff
2054                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2055                 if ($from->{'href'}) {
2056                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2057                                          'a/' . esc_path($from->{'file'}));
2058                 } else { # file was added (no href)
2059                         $line .= 'a/' . esc_path($from->{'file'});
2060                 }
2061                 $line .= ' ';
2062                 if ($to->{'href'}) {
2063                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2064                                          'b/' . esc_path($to->{'file'}));
2065                 } else { # file was deleted
2066                         $line .= 'b/' . esc_path($to->{'file'});
2067                 }
2068         }
2069
2070         return "<div class=\"diff header\">$line</div>\n";
2071 }
2072
2073 # format extended diff header line, before patch itself
2074 sub format_extended_diff_header_line {
2075         my $line = shift;
2076         my $diffinfo = shift;
2077         my ($from, $to) = @_;
2078
2079         # match <path>
2080         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2081                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2082                                        esc_path($from->{'file'}));
2083         }
2084         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2085                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2086                                  esc_path($to->{'file'}));
2087         }
2088         # match single <mode>
2089         if ($line =~ m/\s(\d{6})$/) {
2090                 $line .= '<span class="info"> (' .
2091                          file_type_long($1) .
2092                          ')</span>';
2093         }
2094         # match <hash>
2095         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2096                 # can match only for combined diff
2097                 $line = 'index ';
2098                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2099                         if ($from->{'href'}[$i]) {
2100                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2101                                                   -class=>"hash"},
2102                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2103                         } else {
2104                                 $line .= '0' x 7;
2105                         }
2106                         # separator
2107                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2108                 }
2109                 $line .= '..';
2110                 if ($to->{'href'}) {
2111                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2112                                          substr($diffinfo->{'to_id'},0,7));
2113                 } else {
2114                         $line .= '0' x 7;
2115                 }
2116
2117         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2118                 # can match only for ordinary diff
2119                 my ($from_link, $to_link);
2120                 if ($from->{'href'}) {
2121                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2122                                              substr($diffinfo->{'from_id'},0,7));
2123                 } else {
2124                         $from_link = '0' x 7;
2125                 }
2126                 if ($to->{'href'}) {
2127                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2128                                            substr($diffinfo->{'to_id'},0,7));
2129                 } else {
2130                         $to_link = '0' x 7;
2131                 }
2132                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2133                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2134         }
2135
2136         return $line . "<br/>\n";
2137 }
2138
2139 # format from-file/to-file diff header
2140 sub format_diff_from_to_header {
2141         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2142         my $line;
2143         my $result = '';
2144
2145         $line = $from_line;
2146         #assert($line =~ m/^---/) if DEBUG;
2147         # no extra formatting for "^--- /dev/null"
2148         if (! $diffinfo->{'nparents'}) {
2149                 # ordinary (single parent) diff
2150                 if ($line =~ m!^--- "?a/!) {
2151                         if ($from->{'href'}) {
2152                                 $line = '--- a/' .
2153                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2154                                                 esc_path($from->{'file'}));
2155                         } else {
2156                                 $line = '--- a/' .
2157                                         esc_path($from->{'file'});
2158                         }
2159                 }
2160                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2161
2162         } else {
2163                 # combined diff (merge commit)
2164                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2165                         if ($from->{'href'}[$i]) {
2166                                 $line = '--- ' .
2167                                         $cgi->a({-href=>href(action=>"blobdiff",
2168                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2169                                                              hash_parent_base=>$parents[$i],
2170                                                              file_parent=>$from->{'file'}[$i],
2171                                                              hash=>$diffinfo->{'to_id'},
2172                                                              hash_base=>$hash,
2173                                                              file_name=>$to->{'file'}),
2174                                                  -class=>"path",
2175                                                  -title=>"diff" . ($i+1)},
2176                                                 $i+1) .
2177                                         '/' .
2178                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2179                                                 esc_path($from->{'file'}[$i]));
2180                         } else {
2181                                 $line = '--- /dev/null';
2182                         }
2183                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2184                 }
2185         }
2186
2187         $line = $to_line;
2188         #assert($line =~ m/^\+\+\+/) if DEBUG;
2189         # no extra formatting for "^+++ /dev/null"
2190         if ($line =~ m!^\+\+\+ "?b/!) {
2191                 if ($to->{'href'}) {
2192                         $line = '+++ b/' .
2193                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2194                                         esc_path($to->{'file'}));
2195                 } else {
2196                         $line = '+++ b/' .
2197                                 esc_path($to->{'file'});
2198                 }
2199         }
2200         $result .= qq!<div class="diff to_file">$line</div>\n!;
2201
2202         return $result;
2203 }
2204
2205 # create note for patch simplified by combined diff
2206 sub format_diff_cc_simplified {
2207         my ($diffinfo, @parents) = @_;
2208         my $result = '';
2209
2210         $result .= "<div class=\"diff header\">" .
2211                    "diff --cc ";
2212         if (!is_deleted($diffinfo)) {
2213                 $result .= $cgi->a({-href => href(action=>"blob",
2214                                                   hash_base=>$hash,
2215                                                   hash=>$diffinfo->{'to_id'},
2216                                                   file_name=>$diffinfo->{'to_file'}),
2217                                     -class => "path"},
2218                                    esc_path($diffinfo->{'to_file'}));
2219         } else {
2220                 $result .= esc_path($diffinfo->{'to_file'});
2221         }
2222         $result .= "</div>\n" . # class="diff header"
2223                    "<div class=\"diff nodifferences\">" .
2224                    "Simple merge" .
2225                    "</div>\n"; # class="diff nodifferences"
2226
2227         return $result;
2228 }
2229
2230 sub diff_line_class {
2231         my ($line, $from, $to) = @_;
2232
2233         # ordinary diff
2234         my $num_sign = 1;
2235         # combined diff
2236         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2237                 $num_sign = scalar @{$from->{'href'}};
2238         }
2239
2240         my @diff_line_classifier = (
2241                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2242                 { regexp => qr/^\\/,               class => "incomplete"  },
2243                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2244                 # classifier for context must come before classifier add/rem,
2245                 # or we would have to use more complicated regexp, for example
2246                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2247                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2248                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2249         );
2250         for my $clsfy (@diff_line_classifier) {
2251                 return $clsfy->{'class'}
2252                         if ($line =~ $clsfy->{'regexp'});
2253         }
2254
2255         # fallback
2256         return "";
2257 }
2258
2259 # assumes that $from and $to are defined and correctly filled,
2260 # and that $line holds a line of chunk header for unified diff
2261 sub format_unidiff_chunk_header {
2262         my ($line, $from, $to) = @_;
2263
2264         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2265                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2266
2267         $from_lines = 0 unless defined $from_lines;
2268         $to_lines   = 0 unless defined $to_lines;
2269
2270         if ($from->{'href'}) {
2271                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2272                                      -class=>"list"}, $from_text);
2273         }
2274         if ($to->{'href'}) {
2275                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2276                                      -class=>"list"}, $to_text);
2277         }
2278         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2279                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2280         return $line;
2281 }
2282
2283 # assumes that $from and $to are defined and correctly filled,
2284 # and that $line holds a line of chunk header for combined diff
2285 sub format_cc_diff_chunk_header {
2286         my ($line, $from, $to) = @_;
2287
2288         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2289         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2290
2291         @from_text = split(' ', $ranges);
2292         for (my $i = 0; $i < @from_text; ++$i) {
2293                 ($from_start[$i], $from_nlines[$i]) =
2294                         (split(',', substr($from_text[$i], 1)), 0);
2295         }
2296
2297         $to_text   = pop @from_text;
2298         $to_start  = pop @from_start;
2299         $to_nlines = pop @from_nlines;
2300
2301         $line = "<span class=\"chunk_info\">$prefix ";
2302         for (my $i = 0; $i < @from_text; ++$i) {
2303                 if ($from->{'href'}[$i]) {
2304                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2305                                           -class=>"list"}, $from_text[$i]);
2306                 } else {
2307                         $line .= $from_text[$i];
2308                 }
2309                 $line .= " ";
2310         }
2311         if ($to->{'href'}) {
2312                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2313                                   -class=>"list"}, $to_text);
2314         } else {
2315                 $line .= $to_text;
2316         }
2317         $line .= " $prefix</span>" .
2318                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2319         return $line;
2320 }
2321
2322 # process patch (diff) line (not to be used for diff headers),
2323 # returning class and HTML-formatted (but not wrapped) line
2324 sub process_diff_line {
2325         my $line = shift;
2326         my ($from, $to) = @_;
2327
2328         my $diff_class = diff_line_class($line, $from, $to);
2329
2330         chomp $line;
2331         $line = untabify($line);
2332
2333         if ($from && $to && $line =~ m/^\@{2} /) {
2334                 $line = format_unidiff_chunk_header($line, $from, $to);
2335                 return $diff_class, $line;
2336
2337         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2338                 $line = format_cc_diff_chunk_header($line, $from, $to);
2339                 return $diff_class, $line;
2340
2341         }
2342         return $diff_class, esc_html($line, -nbsp=>1);
2343 }
2344
2345 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2346 # linked.  Pass the hash of the tree/commit to snapshot.
2347 sub format_snapshot_links {
2348         my ($hash) = @_;
2349         my $num_fmts = @snapshot_fmts;
2350         if ($num_fmts > 1) {
2351                 # A parenthesized list of links bearing format names.
2352                 # e.g. "snapshot (_tar.gz_ _zip_)"
2353                 return "snapshot (" . join(' ', map
2354                         $cgi->a({
2355                                 -href => href(
2356                                         action=>"snapshot",
2357                                         hash=>$hash,
2358                                         snapshot_format=>$_
2359                                 )
2360                         }, $known_snapshot_formats{$_}{'display'})
2361                 , @snapshot_fmts) . ")";
2362         } elsif ($num_fmts == 1) {
2363                 # A single "snapshot" link whose tooltip bears the format name.
2364                 # i.e. "_snapshot_"
2365                 my ($fmt) = @snapshot_fmts;
2366                 return
2367                         $cgi->a({
2368                                 -href => href(
2369                                         action=>"snapshot",
2370                                         hash=>$hash,
2371                                         snapshot_format=>$fmt
2372                                 ),
2373                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2374                         }, "snapshot");
2375         } else { # $num_fmts == 0
2376                 return undef;
2377         }
2378 }
2379
2380 ## ......................................................................
2381 ## functions returning values to be passed, perhaps after some
2382 ## transformation, to other functions; e.g. returning arguments to href()
2383
2384 # returns hash to be passed to href to generate gitweb URL
2385 # in -title key it returns description of link
2386 sub get_feed_info {
2387         my $format = shift || 'Atom';
2388         my %res = (action => lc($format));
2389
2390         # feed links are possible only for project views
2391         return unless (defined $project);
2392         # some views should link to OPML, or to generic project feed,
2393         # or don't have specific feed yet (so they should use generic)
2394         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2395
2396         my $branch;
2397         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2398         # from tag links; this also makes possible to detect branch links
2399         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2400             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2401                 $branch = $1;
2402         }
2403         # find log type for feed description (title)
2404         my $type = 'log';
2405         if (defined $file_name) {
2406                 $type  = "history of $file_name";
2407                 $type .= "/" if ($action eq 'tree');
2408                 $type .= " on '$branch'" if (defined $branch);
2409         } else {
2410                 $type = "log of $branch" if (defined $branch);
2411         }
2412
2413         $res{-title} = $type;
2414         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2415         $res{'file_name'} = $file_name;
2416
2417         return %res;
2418 }
2419
2420 ## ----------------------------------------------------------------------
2421 ## git utility subroutines, invoking git commands
2422
2423 # returns path to the core git executable and the --git-dir parameter as list
2424 sub git_cmd {
2425         $number_of_git_cmds++;
2426         return $GIT, '--git-dir='.$git_dir;
2427 }
2428
2429 # quote the given arguments for passing them to the shell
2430 # quote_command("command", "arg 1", "arg with ' and ! characters")
2431 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2432 # Try to avoid using this function wherever possible.
2433 sub quote_command {
2434         return join(' ',
2435                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2436 }
2437
2438 # get HEAD ref of given project as hash
2439 sub git_get_head_hash {
2440         return git_get_full_hash(shift, 'HEAD');
2441 }
2442
2443 sub git_get_full_hash {
2444         return git_get_hash(@_);
2445 }
2446
2447 sub git_get_short_hash {
2448         return git_get_hash(@_, '--short=7');
2449 }
2450
2451 sub git_get_hash {
2452         my ($project, $hash, @options) = @_;
2453         my $o_git_dir = $git_dir;
2454         my $retval = undef;
2455         $git_dir = "$projectroot/$project";
2456         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2457             '--verify', '-q', @options, $hash) {
2458                 $retval = <$fd>;
2459                 chomp $retval if defined $retval;
2460                 close $fd;
2461         }
2462         if (defined $o_git_dir) {
2463                 $git_dir = $o_git_dir;
2464         }
2465         return $retval;
2466 }
2467
2468 # get type of given object
2469 sub git_get_type {
2470         my $hash = shift;
2471
2472         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2473         my $type = <$fd>;
2474         close $fd or return;
2475         chomp $type;
2476         return $type;
2477 }
2478
2479 # repository configuration
2480 our $config_file = '';
2481 our %config;
2482
2483 # store multiple values for single key as anonymous array reference
2484 # single values stored directly in the hash, not as [ <value> ]
2485 sub hash_set_multi {
2486         my ($hash, $key, $value) = @_;
2487
2488         if (!exists $hash->{$key}) {
2489                 $hash->{$key} = $value;
2490         } elsif (!ref $hash->{$key}) {
2491                 $hash->{$key} = [ $hash->{$key}, $value ];
2492         } else {
2493                 push @{$hash->{$key}}, $value;
2494         }
2495 }
2496
2497 # return hash of git project configuration
2498 # optionally limited to some section, e.g. 'gitweb'
2499 sub git_parse_project_config {
2500         my $section_regexp = shift;
2501         my %config;
2502
2503         local $/ = "\0";
2504
2505         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2506                 or return;
2507
2508         while (my $keyval = <$fh>) {
2509                 chomp $keyval;
2510                 my ($key, $value) = split(/\n/, $keyval, 2);
2511
2512                 hash_set_multi(\%config, $key, $value)
2513                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2514         }
2515         close $fh;
2516
2517         return %config;
2518 }
2519
2520 # convert config value to boolean: 'true' or 'false'
2521 # no value, number > 0, 'true' and 'yes' values are true
2522 # rest of values are treated as false (never as error)
2523 sub config_to_bool {
2524         my $val = shift;
2525
2526         return 1 if !defined $val;             # section.key
2527
2528         # strip leading and trailing whitespace
2529         $val =~ s/^\s+//;
2530         $val =~ s/\s+$//;
2531
2532         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2533                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2534 }
2535
2536 # convert config value to simple decimal number
2537 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2538 # to be multiplied by 1024, 1048576, or 1073741824
2539 sub config_to_int {
2540         my $val = shift;
2541
2542         # strip leading and trailing whitespace
2543         $val =~ s/^\s+//;
2544         $val =~ s/\s+$//;
2545
2546         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2547                 $unit = lc($unit);
2548                 # unknown unit is treated as 1
2549                 return $num * ($unit eq 'g' ? 1073741824 :
2550                                $unit eq 'm' ?    1048576 :
2551                                $unit eq 'k' ?       1024 : 1);
2552         }
2553         return $val;
2554 }
2555
2556 # convert config value to array reference, if needed
2557 sub config_to_multi {
2558         my $val = shift;
2559
2560         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2561 }
2562
2563 sub git_get_project_config {
2564         my ($key, $type) = @_;
2565
2566         return unless defined $git_dir;
2567
2568         # key sanity check
2569         return unless ($key);
2570         # only subsection, if exists, is case sensitive,
2571         # and not lowercased by 'git config -z -l'
2572         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2573                 $key = join(".", lc($hi), $mi, lc($lo));
2574         } else {
2575                 $key = lc($key);
2576         }
2577         $key =~ s/^gitweb\.//;
2578         return if ($key =~ m/\W/);
2579
2580         # type sanity check
2581         if (defined $type) {
2582                 $type =~ s/^--//;
2583                 $type = undef
2584                         unless ($type eq 'bool' || $type eq 'int');
2585         }
2586
2587         # get config
2588         if (!defined $config_file ||
2589             $config_file ne "$git_dir/config") {
2590                 %config = git_parse_project_config('gitweb');
2591                 $config_file = "$git_dir/config";
2592         }
2593
2594         # check if config variable (key) exists
2595         return unless exists $config{"gitweb.$key"};
2596
2597         # ensure given type
2598         if (!defined $type) {
2599                 return $config{"gitweb.$key"};
2600         } elsif ($type eq 'bool') {
2601                 # backward compatibility: 'git config --bool' returns true/false
2602                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2603         } elsif ($type eq 'int') {
2604                 return config_to_int($config{"gitweb.$key"});
2605         }
2606         return $config{"gitweb.$key"};
2607 }
2608
2609 # get hash of given path at given ref
2610 sub git_get_hash_by_path {
2611         my $base = shift;
2612         my $path = shift || return undef;
2613         my $type = shift;
2614
2615         $path =~ s,/+$,,;
2616
2617         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2618                 or die_error(500, "Open git-ls-tree failed");
2619         my $line = <$fd>;
2620         close $fd or return undef;
2621
2622         if (!defined $line) {
2623                 # there is no tree or hash given by $path at $base
2624                 return undef;
2625         }
2626
2627         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2628         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2629         if (defined $type && $type ne $2) {
2630                 # type doesn't match
2631                 return undef;
2632         }
2633         return $3;
2634 }
2635
2636 # get path of entry with given hash at given tree-ish (ref)
2637 # used to get 'from' filename for combined diff (merge commit) for renames
2638 sub git_get_path_by_hash {
2639         my $base = shift || return;
2640         my $hash = shift || return;
2641
2642         local $/ = "\0";
2643
2644         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2645                 or return undef;
2646         while (my $line = <$fd>) {
2647                 chomp $line;
2648
2649                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2650                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2651                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2652                         close $fd;
2653                         return $1;
2654                 }
2655         }
2656         close $fd;
2657         return undef;
2658 }
2659
2660 ## ......................................................................
2661 ## git utility functions, directly accessing git repository
2662
2663 # get the value of config variable either from file named as the variable
2664 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2665 # configuration variable in the repository config file.
2666 sub git_get_file_or_project_config {
2667         my ($path, $name) = @_;
2668
2669         $git_dir = "$projectroot/$path";
2670         open my $fd, '<', "$git_dir/$name"
2671                 or return git_get_project_config($name);
2672         my $conf = <$fd>;
2673         close $fd;
2674         if (defined $conf) {
2675                 chomp $conf;
2676         }
2677         return $conf;
2678 }
2679
2680 sub git_get_project_description {
2681         my $path = shift;
2682         return git_get_file_or_project_config($path, 'description');
2683 }
2684
2685 sub git_get_project_category {
2686         my $path = shift;
2687         return git_get_file_or_project_config($path, 'category');
2688 }
2689
2690
2691 # supported formats:
2692 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2693 #   - if its contents is a number, use it as tag weight,
2694 #   - otherwise add a tag with weight 1
2695 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2696 #   the same value multiple times increases tag weight
2697 # * `gitweb.ctag' multi-valued repo config variable
2698 sub git_get_project_ctags {
2699         my $project = shift;
2700         my $ctags = {};
2701
2702         $git_dir = "$projectroot/$project";
2703         if (opendir my $dh, "$git_dir/ctags") {
2704                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2705                 foreach my $tagfile (@files) {
2706                         open my $ct, '<', $tagfile
2707                                 or next;
2708                         my $val = <$ct>;
2709                         chomp $val if $val;
2710                         close $ct;
2711
2712                         (my $ctag = $tagfile) =~ s#.*/##;
2713                         if ($val =~ /^\d+$/) {
2714                                 $ctags->{$ctag} = $val;
2715                         } else {
2716                                 $ctags->{$ctag} = 1;
2717                         }
2718                 }
2719                 closedir $dh;
2720
2721         } elsif (open my $fh, '<', "$git_dir/ctags") {
2722                 while (my $line = <$fh>) {
2723                         chomp $line;
2724                         $ctags->{$line}++ if $line;
2725                 }
2726                 close $fh;
2727
2728         } else {
2729                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2730                 foreach my $tag (@$taglist) {
2731                         $ctags->{$tag}++;
2732                 }
2733         }
2734
2735         return $ctags;
2736 }
2737
2738 # return hash, where keys are content tags ('ctags'),
2739 # and values are sum of weights of given tag in every project
2740 sub git_gather_all_ctags {
2741         my $projects = shift;
2742         my $ctags = {};
2743
2744         foreach my $p (@$projects) {
2745                 foreach my $ct (keys %{$p->{'ctags'}}) {
2746                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2747                 }
2748         }
2749
2750         return $ctags;
2751 }
2752
2753 sub git_populate_project_tagcloud {
2754         my $ctags = shift;
2755
2756         # First, merge different-cased tags; tags vote on casing
2757         my %ctags_lc;
2758         foreach (keys %$ctags) {
2759                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2760                 if (not $ctags_lc{lc $_}->{topcount}
2761                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2762                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2763                         $ctags_lc{lc $_}->{topname} = $_;
2764                 }
2765         }
2766
2767         my $cloud;
2768         my $matched = $cgi->param('by_tag');
2769         if (eval { require HTML::TagCloud; 1; }) {
2770                 $cloud = HTML::TagCloud->new;
2771                 foreach my $ctag (sort keys %ctags_lc) {
2772                         # Pad the title with spaces so that the cloud looks
2773                         # less crammed.
2774                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2775                         $title =~ s/ /&nbsp;/g;
2776                         $title =~ s/^/&nbsp;/g;
2777                         $title =~ s/$/&nbsp;/g;
2778                         if (defined $matched && $matched eq $ctag) {
2779                                 $title = qq(<span class="match">$title</span>);
2780                         }
2781                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2782                                     $ctags_lc{$ctag}->{count});
2783                 }
2784         } else {
2785                 $cloud = {};
2786                 foreach my $ctag (keys %ctags_lc) {
2787                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2788                         if (defined $matched && $matched eq $ctag) {
2789                                 $title = qq(<span class="match">$title</span>);
2790                         }
2791                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2792                         $cloud->{$ctag}{ctag} =
2793                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2794                 }
2795         }
2796         return $cloud;
2797 }
2798
2799 sub git_show_project_tagcloud {
2800         my ($cloud, $count) = @_;
2801         if (ref $cloud eq 'HTML::TagCloud') {
2802                 return $cloud->html_and_css($count);
2803         } else {
2804                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2805                 return
2806                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2807                         join (', ', map {
2808                                 $cloud->{$_}->{'ctag'}
2809                         } splice(@tags, 0, $count)) .
2810                         '</div>';
2811         }
2812 }
2813
2814 sub git_get_project_url_list {
2815         my $path = shift;
2816
2817         $git_dir = "$projectroot/$path";
2818         open my $fd, '<', "$git_dir/cloneurl"
2819                 or return wantarray ?
2820                 @{ config_to_multi(git_get_project_config('url')) } :
2821                    config_to_multi(git_get_project_config('url'));
2822         my @git_project_url_list = map { chomp; $_ } <$fd>;
2823         close $fd;
2824
2825         return wantarray ? @git_project_url_list : \@git_project_url_list;
2826 }
2827
2828 sub git_get_projects_list {
2829         my $filter = shift || '';
2830         my @list;
2831
2832         $filter =~ s/\.git$//;
2833
2834         if (-d $projects_list) {
2835                 # search in directory
2836                 my $dir = $projects_list;
2837                 # remove the trailing "/"
2838                 $dir =~ s!/+$!!;
2839                 my $pfxlen = length("$dir");
2840                 my $pfxdepth = ($dir =~ tr!/!!);
2841                 # when filtering, search only given subdirectory
2842                 if ($filter) {
2843                         $dir .= "/$filter";
2844                         $dir =~ s!/+$!!;
2845                 }
2846
2847                 File::Find::find({
2848                         follow_fast => 1, # follow symbolic links
2849                         follow_skip => 2, # ignore duplicates
2850                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2851                         wanted => sub {
2852                                 # global variables
2853                                 our $project_maxdepth;
2854                                 our $projectroot;
2855                                 # skip project-list toplevel, if we get it.
2856                                 return if (m!^[/.]$!);
2857                                 # only directories can be git repositories
2858                                 return unless (-d $_);
2859                                 # don't traverse too deep (Find is super slow on os x)
2860                                 # $project_maxdepth excludes depth of $projectroot
2861                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2862                                         $File::Find::prune = 1;
2863                                         return;
2864                                 }
2865
2866                                 my $path = substr($File::Find::name, $pfxlen + 1);
2867                                 # we check related file in $projectroot
2868                                 if (check_export_ok("$projectroot/$path")) {
2869                                         push @list, { path => $path };
2870                                         $File::Find::prune = 1;
2871                                 }
2872                         },
2873                 }, "$dir");
2874
2875         } elsif (-f $projects_list) {
2876                 # read from file(url-encoded):
2877                 # 'git%2Fgit.git Linus+Torvalds'
2878                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2879                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2880                 open my $fd, '<', $projects_list or return;
2881         PROJECT:
2882                 while (my $line = <$fd>) {
2883                         chomp $line;
2884                         my ($path, $owner) = split ' ', $line;
2885                         $path = unescape($path);
2886                         $owner = unescape($owner);
2887                         if (!defined $path) {
2888                                 next;
2889                         }
2890                         # if $filter is rpovided, check if $path begins with $filter
2891                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2892                                 next;
2893                         }
2894                         if (check_export_ok("$projectroot/$path")) {
2895                                 my $pr = {
2896                                         path => $path,
2897                                         owner => to_utf8($owner),
2898                                 };
2899                                 push @list, $pr;
2900                         }
2901                 }
2902                 close $fd;
2903         }
2904         return @list;
2905 }
2906
2907 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2908 # as side effects it sets 'forks' field to list of forks for forked projects
2909 sub filter_forks_from_projects_list {
2910         my $projects = shift;
2911
2912         my %trie; # prefix tree of directories (path components)
2913         # generate trie out of those directories that might contain forks
2914         foreach my $pr (@$projects) {
2915                 my $path = $pr->{'path'};
2916                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2917                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2918                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2919                 next unless (-d "$projectroot/$path"); # containing directory exists
2920                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2921
2922                 # add to trie
2923                 my @dirs = split('/', $path);
2924                 # walk the trie, until either runs out of components or out of trie
2925                 my $ref = \%trie;
2926                 while (scalar @dirs &&
2927                        exists($ref->{$dirs[0]})) {
2928                         $ref = $ref->{shift @dirs};
2929                 }
2930                 # create rest of trie structure from rest of components
2931                 foreach my $dir (@dirs) {
2932                         $ref = $ref->{$dir} = {};
2933                 }
2934                 # create end marker, store $pr as a data
2935                 $ref->{''} = $pr if (!exists $ref->{''});
2936         }
2937
2938         # filter out forks, by finding shortest prefix match for paths
2939         my @filtered;
2940  PROJECT:
2941         foreach my $pr (@$projects) {
2942                 # trie lookup
2943                 my $ref = \%trie;
2944         DIR:
2945                 foreach my $dir (split('/', $pr->{'path'})) {
2946                         if (exists $ref->{''}) {
2947                                 # found [shortest] prefix, is a fork - skip it
2948                                 push @{$ref->{''}{'forks'}}, $pr;
2949                                 next PROJECT;
2950                         }
2951                         if (!exists $ref->{$dir}) {
2952                                 # not in trie, cannot have prefix, not a fork
2953                                 push @filtered, $pr;
2954                                 next PROJECT;
2955                         }
2956                         # If the dir is there, we just walk one step down the trie.
2957                         $ref = $ref->{$dir};
2958                 }
2959                 # we ran out of trie
2960                 # (shouldn't happen: it's either no match, or end marker)
2961                 push @filtered, $pr;
2962         }
2963
2964         return @filtered;
2965 }
2966
2967 # note: fill_project_list_info must be run first,
2968 # for 'descr_long' and 'ctags' to be filled
2969 sub search_projects_list {
2970         my ($projlist, %opts) = @_;
2971         my $tagfilter  = $opts{'tagfilter'};
2972         my $searchtext = $opts{'searchtext'};
2973
2974         return @$projlist
2975                 unless ($tagfilter || $searchtext);
2976
2977         my @projects;
2978  PROJECT:
2979         foreach my $pr (@$projlist) {
2980
2981                 if ($tagfilter) {
2982                         next unless ref($pr->{'ctags'}) eq 'HASH';
2983                         next unless
2984                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2985                 }
2986
2987                 if ($searchtext) {
2988                         next unless
2989                                 $pr->{'path'} =~ /$searchtext/ ||
2990                                 $pr->{'descr_long'} =~ /$searchtext/;
2991                 }
2992
2993                 push @projects, $pr;
2994         }
2995
2996         return @projects;
2997 }
2998
2999 our $gitweb_project_owner = undef;
3000 sub git_get_project_list_from_file {
3001
3002         return if (defined $gitweb_project_owner);
3003
3004         $gitweb_project_owner = {};
3005         # read from file (url-encoded):
3006         # 'git%2Fgit.git Linus+Torvalds'
3007         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3008         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3009         if (-f $projects_list) {
3010                 open(my $fd, '<', $projects_list);
3011                 while (my $line = <$fd>) {
3012                         chomp $line;
3013                         my ($pr, $ow) = split ' ', $line;
3014                         $pr = unescape($pr);
3015                         $ow = unescape($ow);
3016                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3017                 }
3018                 close $fd;
3019         }
3020 }
3021
3022 sub git_get_project_owner {
3023         my $project = shift;
3024         my $owner;
3025
3026         return undef unless $project;
3027         $git_dir = "$projectroot/$project";
3028
3029         if (!defined $gitweb_project_owner) {
3030                 git_get_project_list_from_file();
3031         }
3032
3033         if (exists $gitweb_project_owner->{$project}) {
3034                 $owner = $gitweb_project_owner->{$project};
3035         }
3036         if (!defined $owner){
3037                 $owner = git_get_project_config('owner');
3038         }
3039         if (!defined $owner) {
3040                 $owner = get_file_owner("$git_dir");
3041         }
3042
3043         return $owner;
3044 }
3045
3046 sub git_get_last_activity {
3047         my ($path) = @_;
3048         my $fd;
3049
3050         $git_dir = "$projectroot/$path";
3051         open($fd, "-|", git_cmd(), 'for-each-ref',
3052              '--format=%(committer)',
3053              '--sort=-committerdate',
3054              '--count=1',
3055              'refs/heads') or return;
3056         my $most_recent = <$fd>;
3057         close $fd or return;
3058         if (defined $most_recent &&
3059             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3060                 my $timestamp = $1;
3061                 my $age = time - $timestamp;
3062                 return ($age, age_string($age));
3063         }
3064         return (undef, undef);
3065 }
3066
3067 # Implementation note: when a single remote is wanted, we cannot use 'git
3068 # remote show -n' because that command always work (assuming it's a remote URL
3069 # if it's not defined), and we cannot use 'git remote show' because that would
3070 # try to make a network roundtrip. So the only way to find if that particular
3071 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3072 # and when we find what we want.
3073 sub git_get_remotes_list {
3074         my $wanted = shift;
3075         my %remotes = ();
3076
3077         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3078         return unless $fd;
3079         while (my $remote = <$fd>) {
3080                 chomp $remote;
3081                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3082                 next if $wanted and not $remote eq $wanted;
3083                 my ($url, $key) = ($1, $2);
3084
3085                 $remotes{$remote} ||= { 'heads' => () };
3086                 $remotes{$remote}{$key} = $url;
3087         }
3088         close $fd or return;
3089         return wantarray ? %remotes : \%remotes;
3090 }
3091
3092 # Takes a hash of remotes as first parameter and fills it by adding the
3093 # available remote heads for each of the indicated remotes.
3094 sub fill_remote_heads {
3095         my $remotes = shift;
3096         my @heads = map { "remotes/$_" } keys %$remotes;
3097         my @remoteheads = git_get_heads_list(undef, @heads);
3098         foreach my $remote (keys %$remotes) {
3099                 $remotes->{$remote}{'heads'} = [ grep {
3100                         $_->{'name'} =~ s!^$remote/!!
3101                         } @remoteheads ];
3102         }
3103 }
3104
3105 sub git_get_references {
3106         my $type = shift || "";
3107         my %refs;
3108         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3109         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3110         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3111                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3112                 or return;
3113
3114         while (my $line = <$fd>) {
3115                 chomp $line;
3116                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3117                         if (defined $refs{$1}) {
3118                                 push @{$refs{$1}}, $2;
3119                         } else {
3120                                 $refs{$1} = [ $2 ];
3121                         }
3122                 }
3123         }
3124         close $fd or return;
3125         return \%refs;
3126 }
3127
3128 sub git_get_rev_name_tags {
3129         my $hash = shift || return undef;
3130
3131         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3132                 or return;
3133         my $name_rev = <$fd>;
3134         close $fd;
3135
3136         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3137                 return $1;
3138         } else {
3139                 # catches also '$hash undefined' output
3140                 return undef;
3141         }
3142 }
3143
3144 ## ----------------------------------------------------------------------
3145 ## parse to hash functions
3146
3147 sub parse_date {
3148         my $epoch = shift;
3149         my $tz = shift || "-0000";
3150
3151         my %date;
3152         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3153         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3154         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3155         $date{'hour'} = $hour;
3156         $date{'minute'} = $min;
3157         $date{'mday'} = $mday;
3158         $date{'day'} = $days[$wday];
3159         $date{'month'} = $months[$mon];
3160         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3161                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3162         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3163                              $mday, $months[$mon], $hour ,$min;
3164         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3165                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3166
3167         my ($tz_sign, $tz_hour, $tz_min) =
3168                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3169         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3170         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3171         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3172         $date{'hour_local'} = $hour;
3173         $date{'minute_local'} = $min;
3174         $date{'tz_local'} = $tz;
3175         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3176                                   1900+$year, $mon+1, $mday,
3177                                   $hour, $min, $sec, $tz);
3178         return %date;
3179 }
3180
3181 sub parse_tag {
3182         my $tag_id = shift;
3183         my %tag;
3184         my @comment;
3185
3186         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3187         $tag{'id'} = $tag_id;
3188         while (my $line = <$fd>) {
3189                 chomp $line;
3190                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3191                         $tag{'object'} = $1;
3192                 } elsif ($line =~ m/^type (.+)$/) {
3193                         $tag{'type'} = $1;
3194                 } elsif ($line =~ m/^tag (.+)$/) {
3195                         $tag{'name'} = $1;
3196                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3197                         $tag{'author'} = $1;
3198                         $tag{'author_epoch'} = $2;
3199                         $tag{'author_tz'} = $3;
3200                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3201                                 $tag{'author_name'}  = $1;
3202                                 $tag{'author_email'} = $2;
3203                         } else {
3204                                 $tag{'author_name'} = $tag{'author'};
3205                         }
3206                 } elsif ($line =~ m/--BEGIN/) {
3207                         push @comment, $line;
3208                         last;
3209                 } elsif ($line eq "") {
3210                         last;
3211                 }
3212         }
3213         push @comment, <$fd>;
3214         $tag{'comment'} = \@comment;
3215         close $fd or return;
3216         if (!defined $tag{'name'}) {
3217                 return
3218         };
3219         return %tag
3220 }
3221
3222 sub parse_commit_text {
3223         my ($commit_text, $withparents) = @_;
3224         my @commit_lines = split '\n', $commit_text;
3225         my %co;
3226
3227         pop @commit_lines; # Remove '\0'
3228
3229         if (! @commit_lines) {
3230                 return;
3231         }
3232
3233         my $header = shift @commit_lines;
3234         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3235                 return;
3236         }
3237         ($co{'id'}, my @parents) = split ' ', $header;
3238         while (my $line = shift @commit_lines) {
3239                 last if $line eq "\n";
3240                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3241                         $co{'tree'} = $1;
3242                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3243                         push @parents, $1;
3244                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3245                         $co{'author'} = to_utf8($1);
3246                         $co{'author_epoch'} = $2;
3247                         $co{'author_tz'} = $3;
3248                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3249                                 $co{'author_name'}  = $1;
3250                                 $co{'author_email'} = $2;
3251                         } else {
3252                                 $co{'author_name'} = $co{'author'};
3253                         }
3254                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3255                         $co{'committer'} = to_utf8($1);
3256                         $co{'committer_epoch'} = $2;
3257                         $co{'committer_tz'} = $3;
3258                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3259                                 $co{'committer_name'}  = $1;
3260                                 $co{'committer_email'} = $2;
3261                         } else {
3262                                 $co{'committer_name'} = $co{'committer'};
3263                         }
3264                 }
3265         }
3266         if (!defined $co{'tree'}) {
3267                 return;
3268         };
3269         $co{'parents'} = \@parents;
3270         $co{'parent'} = $parents[0];
3271
3272         foreach my $title (@commit_lines) {
3273                 $title =~ s/^    //;
3274                 if ($title ne "") {
3275                         $co{'title'} = chop_str($title, 80, 5);
3276                         # remove leading stuff of merges to make the interesting part visible
3277                         if (length($title) > 50) {
3278                                 $title =~ s/^Automatic //;
3279                                 $title =~ s/^merge (of|with) /Merge ... /i;
3280                                 if (length($title) > 50) {
3281                                         $title =~ s/(http|rsync):\/\///;
3282                                 }
3283                                 if (length($title) > 50) {
3284                                         $title =~ s/(master|www|rsync)\.//;
3285                                 }
3286                                 if (length($title) > 50) {
3287                                         $title =~ s/kernel.org:?//;
3288                                 }
3289                                 if (length($title) > 50) {
3290                                         $title =~ s/\/pub\/scm//;
3291                                 }
3292                         }
3293                         $co{'title_short'} = chop_str($title, 50, 5);
3294                         last;
3295                 }
3296         }
3297         if (! defined $co{'title'} || $co{'title'} eq "") {
3298                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3299         }
3300         # remove added spaces
3301         foreach my $line (@commit_lines) {
3302                 $line =~ s/^    //;
3303         }
3304         $co{'comment'} = \@commit_lines;
3305
3306         my $age = time - $co{'committer_epoch'};
3307         $co{'age'} = $age;
3308         $co{'age_string'} = age_string($age);
3309         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3310         if ($age > 60*60*24*7*2) {
3311                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3312                 $co{'age_string_age'} = $co{'age_string'};
3313         } else {
3314                 $co{'age_string_date'} = $co{'age_string'};
3315                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3316         }
3317         return %co;
3318 }
3319
3320 sub parse_commit {
3321         my ($commit_id) = @_;
3322         my %co;
3323
3324         local $/ = "\0";
3325
3326         open my $fd, "-|", git_cmd(), "rev-list",
3327                 "--parents",
3328                 "--header",
3329                 "--max-count=1",
3330                 $commit_id,
3331                 "--",
3332                 or die_error(500, "Open git-rev-list failed");
3333         %co = parse_commit_text(<$fd>, 1);
3334         close $fd;
3335
3336         return %co;
3337 }
3338
3339 sub parse_commits {
3340         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3341         my @cos;
3342
3343         $maxcount ||= 1;
3344         $skip ||= 0;
3345
3346         local $/ = "\0";
3347
3348         open my $fd, "-|", git_cmd(), "rev-list",
3349                 "--header",
3350                 @args,
3351                 ("--max-count=" . $maxcount),
3352                 ("--skip=" . $skip),
3353                 @extra_options,
3354                 $commit_id,
3355                 "--",
3356                 ($filename ? ($filename) : ())
3357                 or die_error(500, "Open git-rev-list failed");
3358         while (my $line = <$fd>) {
3359                 my %co = parse_commit_text($line);
3360                 push @cos, \%co;
3361         }
3362         close $fd;
3363
3364         return wantarray ? @cos : \@cos;
3365 }
3366
3367 # parse line of git-diff-tree "raw" output
3368 sub parse_difftree_raw_line {
3369         my $line = shift;
3370         my %res;
3371
3372         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3373         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3374         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3375                 $res{'from_mode'} = $1;
3376                 $res{'to_mode'} = $2;
3377                 $res{'from_id'} = $3;
3378                 $res{'to_id'} = $4;
3379                 $res{'status'} = $5;
3380                 $res{'similarity'} = $6;
3381                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3382                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3383                 } else {
3384                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3385                 }
3386         }
3387         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3388         # combined diff (for merge commit)
3389         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3390                 $res{'nparents'}  = length($1);
3391                 $res{'from_mode'} = [ split(' ', $2) ];
3392                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3393                 $res{'from_id'} = [ split(' ', $3) ];
3394                 $res{'to_id'} = pop @{$res{'from_id'}};
3395                 $res{'status'} = [ split('', $4) ];
3396                 $res{'to_file'} = unquote($5);
3397         }
3398         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3399         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3400                 $res{'commit'} = $1;
3401         }
3402
3403         return wantarray ? %res : \%res;
3404 }
3405
3406 # wrapper: return parsed line of git-diff-tree "raw" output
3407 # (the argument might be raw line, or parsed info)
3408 sub parsed_difftree_line {
3409         my $line_or_ref = shift;
3410
3411         if (ref($line_or_ref) eq "HASH") {
3412                 # pre-parsed (or generated by hand)
3413                 return $line_or_ref;
3414         } else {
3415                 return parse_difftree_raw_line($line_or_ref);
3416         }
3417 }
3418
3419 # parse line of git-ls-tree output
3420 sub parse_ls_tree_line {
3421         my $line = shift;
3422         my %opts = @_;
3423         my %res;
3424
3425         if ($opts{'-l'}) {
3426                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3427                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3428
3429                 $res{'mode'} = $1;
3430                 $res{'type'} = $2;
3431                 $res{'hash'} = $3;
3432                 $res{'size'} = $4;
3433                 if ($opts{'-z'}) {
3434                         $res{'name'} = $5;
3435                 } else {
3436                         $res{'name'} = unquote($5);
3437                 }
3438         } else {
3439                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3440                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3441
3442                 $res{'mode'} = $1;
3443                 $res{'type'} = $2;
3444                 $res{'hash'} = $3;
3445                 if ($opts{'-z'}) {
3446                         $res{'name'} = $4;
3447                 } else {
3448                         $res{'name'} = unquote($4);
3449                 }
3450         }
3451
3452         return wantarray ? %res : \%res;
3453 }
3454
3455 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3456 sub parse_from_to_diffinfo {
3457         my ($diffinfo, $from, $to, @parents) = @_;
3458
3459         if ($diffinfo->{'nparents'}) {
3460                 # combined diff
3461                 $from->{'file'} = [];
3462                 $from->{'href'} = [];
3463                 fill_from_file_info($diffinfo, @parents)
3464                         unless exists $diffinfo->{'from_file'};
3465                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3466                         $from->{'file'}[$i] =
3467                                 defined $diffinfo->{'from_file'}[$i] ?
3468                                         $diffinfo->{'from_file'}[$i] :
3469                                         $diffinfo->{'to_file'};
3470                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3471                                 $from->{'href'}[$i] = href(action=>"blob",
3472                                                            hash_base=>$parents[$i],
3473                                                            hash=>$diffinfo->{'from_id'}[$i],
3474                                                            file_name=>$from->{'file'}[$i]);
3475                         } else {
3476                                 $from->{'href'}[$i] = undef;
3477                         }
3478                 }
3479         } else {
3480                 # ordinary (not combined) diff
3481                 $from->{'file'} = $diffinfo->{'from_file'};
3482                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3483                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3484                                                hash=>$diffinfo->{'from_id'},
3485                                                file_name=>$from->{'file'});
3486                 } else {
3487                         delete $from->{'href'};
3488                 }
3489         }
3490
3491         $to->{'file'} = $diffinfo->{'to_file'};
3492         if (!is_deleted($diffinfo)) { # file exists in result
3493                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3494                                      hash=>$diffinfo->{'to_id'},
3495                                      file_name=>$to->{'file'});
3496         } else {
3497                 delete $to->{'href'};
3498         }
3499 }
3500
3501 ## ......................................................................
3502 ## parse to array of hashes functions
3503
3504 sub git_get_heads_list {
3505         my ($limit, @classes) = @_;
3506         @classes = ('heads') unless @classes;
3507         my @patterns = map { "refs/$_" } @classes;
3508         my @headslist;
3509
3510         open my $fd, '-|', git_cmd(), 'for-each-ref',
3511                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3512                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3513                 @patterns
3514                 or return;
3515         while (my $line = <$fd>) {
3516                 my %ref_item;
3517
3518                 chomp $line;
3519                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3520                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3521                 my ($committer, $epoch, $tz) =
3522                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3523                 $ref_item{'fullname'}  = $name;
3524                 $name =~ s!^refs/(?:head|remote)s/!!;
3525
3526                 $ref_item{'name'}  = $name;
3527                 $ref_item{'id'}    = $hash;
3528                 $ref_item{'title'} = $title || '(no commit message)';
3529                 $ref_item{'epoch'} = $epoch;
3530                 if ($epoch) {
3531                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3532                 } else {
3533                         $ref_item{'age'} = "unknown";
3534                 }
3535
3536                 push @headslist, \%ref_item;
3537         }
3538         close $fd;
3539
3540         return wantarray ? @headslist : \@headslist;
3541 }
3542
3543 sub git_get_tags_list {
3544         my $limit = shift;
3545         my @tagslist;
3546
3547         open my $fd, '-|', git_cmd(), 'for-each-ref',
3548                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3549                 '--format=%(objectname) %(objecttype) %(refname) '.
3550                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3551                 'refs/tags'
3552                 or return;
3553         while (my $line = <$fd>) {
3554                 my %ref_item;
3555
3556                 chomp $line;
3557                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3558                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3559                 my ($creator, $epoch, $tz) =
3560                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3561                 $ref_item{'fullname'} = $name;
3562                 $name =~ s!^refs/tags/!!;
3563
3564                 $ref_item{'type'} = $type;
3565                 $ref_item{'id'} = $id;
3566                 $ref_item{'name'} = $name;
3567                 if ($type eq "tag") {
3568                         $ref_item{'subject'} = $title;
3569                         $ref_item{'reftype'} = $reftype;
3570                         $ref_item{'refid'}   = $refid;
3571                 } else {
3572                         $ref_item{'reftype'} = $type;
3573                         $ref_item{'refid'}   = $id;
3574                 }
3575
3576                 if ($type eq "tag" || $type eq "commit") {
3577                         $ref_item{'epoch'} = $epoch;
3578                         if ($epoch) {
3579                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3580                         } else {
3581                                 $ref_item{'age'} = "unknown";
3582                         }
3583                 }
3584
3585                 push @tagslist, \%ref_item;
3586         }
3587         close $fd;
3588
3589         return wantarray ? @tagslist : \@tagslist;
3590 }
3591
3592 ## ----------------------------------------------------------------------
3593 ## filesystem-related functions
3594
3595 sub get_file_owner {
3596         my $path = shift;
3597
3598         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3599         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3600         if (!defined $gcos) {
3601                 return undef;
3602         }
3603         my $owner = $gcos;
3604         $owner =~ s/[,;].*$//;
3605         return to_utf8($owner);
3606 }
3607
3608 # assume that file exists
3609 sub insert_file {
3610         my $filename = shift;
3611
3612         open my $fd, '<', $filename;
3613         print map { to_utf8($_) } <$fd>;
3614         close $fd;
3615 }
3616
3617 ## ......................................................................
3618 ## mimetype related functions
3619
3620 sub mimetype_guess_file {
3621         my $filename = shift;
3622         my $mimemap = shift;
3623         -r $mimemap or return undef;
3624
3625         my %mimemap;
3626         open(my $mh, '<', $mimemap) or return undef;
3627         while (<$mh>) {
3628                 next if m/^#/; # skip comments
3629                 my ($mimetype, @exts) = split(/\s+/);
3630                 foreach my $ext (@exts) {
3631                         $mimemap{$ext} = $mimetype;
3632                 }
3633         }
3634         close($mh);
3635
3636         $filename =~ /\.([^.]*)$/;
3637         return $mimemap{$1};
3638 }
3639
3640 sub mimetype_guess {
3641         my $filename = shift;
3642         my $mime;
3643         $filename =~ /\./ or return undef;
3644
3645         if ($mimetypes_file) {
3646                 my $file = $mimetypes_file;
3647                 if ($file !~ m!^/!) { # if it is relative path
3648                         # it is relative to project
3649                         $file = "$projectroot/$project/$file";
3650                 }
3651                 $mime = mimetype_guess_file($filename, $file);
3652         }
3653         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3654         return $mime;
3655 }
3656
3657 sub blob_mimetype {
3658         my $fd = shift;
3659         my $filename = shift;
3660
3661         if ($filename) {
3662                 my $mime = mimetype_guess($filename);
3663                 $mime and return $mime;
3664         }
3665
3666         # just in case
3667         return $default_blob_plain_mimetype unless $fd;
3668
3669         if (-T $fd) {
3670                 return 'text/plain';
3671         } elsif (! $filename) {
3672                 return 'application/octet-stream';
3673         } elsif ($filename =~ m/\.png$/i) {
3674                 return 'image/png';
3675         } elsif ($filename =~ m/\.gif$/i) {
3676                 return 'image/gif';
3677         } elsif ($filename =~ m/\.jpe?g$/i) {
3678                 return 'image/jpeg';
3679         } else {
3680                 return 'application/octet-stream';
3681         }
3682 }
3683
3684 sub blob_contenttype {
3685         my ($fd, $file_name, $type) = @_;
3686
3687         $type ||= blob_mimetype($fd, $file_name);
3688         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3689                 $type .= "; charset=$default_text_plain_charset";
3690         }
3691
3692         return $type;
3693 }
3694
3695 # guess file syntax for syntax highlighting; return undef if no highlighting
3696 # the name of syntax can (in the future) depend on syntax highlighter used
3697 sub guess_file_syntax {
3698         my ($highlight, $mimetype, $file_name) = @_;
3699         return undef unless ($highlight && defined $file_name);
3700         my $basename = basename($file_name, '.in');
3701         return $highlight_basename{$basename}
3702                 if exists $highlight_basename{$basename};
3703
3704         $basename =~ /\.([^.]*)$/;
3705         my $ext = $1 or return undef;
3706         return $highlight_ext{$ext}
3707                 if exists $highlight_ext{$ext};
3708
3709         return undef;
3710 }
3711
3712 # run highlighter and return FD of its output,
3713 # or return original FD if no highlighting
3714 sub run_highlighter {
3715         my ($fd, $highlight, $syntax) = @_;
3716         return $fd unless ($highlight && defined $syntax);
3717
3718         close $fd;
3719         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3720                   quote_command($highlight_bin).
3721                   " --replace-tabs=8 --fragment --syntax $syntax |"
3722                 or die_error(500, "Couldn't open file or run syntax highlighter");
3723         return $fd;
3724 }
3725
3726 ## ======================================================================
3727 ## functions printing HTML: header, footer, error page
3728
3729 sub get_page_title {
3730         my $title = to_utf8($site_name);
3731
3732         return $title unless (defined $project);
3733         $title .= " - " . to_utf8($project);
3734
3735         return $title unless (defined $action);
3736         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3737
3738         return $title unless (defined $file_name);
3739         $title .= " - " . esc_path($file_name);
3740         if ($action eq "tree" && $file_name !~ m|/$|) {
3741                 $title .= "/";
3742         }
3743
3744         return $title;
3745 }
3746
3747 sub get_content_type_html {
3748         # require explicit support from the UA if we are to send the page as
3749         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3750         # we have to do this because MSIE sometimes globs '*/*', pretending to
3751         # support xhtml+xml but choking when it gets what it asked for.
3752         if (defined $cgi->http('HTTP_ACCEPT') &&
3753             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3754             $cgi->Accept('application/xhtml+xml') != 0) {
3755                 return 'application/xhtml+xml';
3756         } else {
3757                 return 'text/html';
3758         }
3759 }
3760
3761 sub print_feed_meta {
3762         if (defined $project) {
3763                 my %href_params = get_feed_info();
3764                 if (!exists $href_params{'-title'}) {
3765                         $href_params{'-title'} = 'log';
3766                 }
3767
3768                 foreach my $format (qw(RSS Atom)) {
3769                         my $type = lc($format);
3770                         my %link_attr = (
3771                                 '-rel' => 'alternate',
3772                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3773                                 '-type' => "application/$type+xml"
3774                         );
3775
3776                         $href_params{'action'} = $type;
3777                         $link_attr{'-href'} = href(%href_params);
3778                         print "<link ".
3779                               "rel=\"$link_attr{'-rel'}\" ".
3780                               "title=\"$link_attr{'-title'}\" ".
3781                               "href=\"$link_attr{'-href'}\" ".
3782                               "type=\"$link_attr{'-type'}\" ".
3783                               "/>\n";
3784
3785                         $href_params{'extra_options'} = '--no-merges';
3786                         $link_attr{'-href'} = href(%href_params);
3787                         $link_attr{'-title'} .= ' (no merges)';
3788                         print "<link ".
3789                               "rel=\"$link_attr{'-rel'}\" ".
3790                               "title=\"$link_attr{'-title'}\" ".
3791                               "href=\"$link_attr{'-href'}\" ".
3792                               "type=\"$link_attr{'-type'}\" ".
3793                               "/>\n";
3794                 }
3795
3796         } else {
3797                 printf('<link rel="alternate" title="%s projects list" '.
3798                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3799                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3800                 printf('<link rel="alternate" title="%s projects feeds" '.
3801                        'href="%s" type="text/x-opml" />'."\n",
3802                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3803         }
3804 }
3805
3806 sub print_header_links {
3807         my $status = shift;
3808
3809         # print out each stylesheet that exist, providing backwards capability
3810         # for those people who defined $stylesheet in a config file
3811         if (defined $stylesheet) {
3812                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3813         } else {
3814                 foreach my $stylesheet (@stylesheets) {
3815                         next unless $stylesheet;
3816                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3817                 }
3818         }
3819         print_feed_meta()
3820                 if ($status eq '200 OK');
3821         if (defined $favicon) {
3822                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3823         }
3824 }
3825
3826 sub print_nav_breadcrumbs {
3827         my %opts = @_;
3828
3829         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3830         if (defined $project) {
3831                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3832                 if (defined $action) {
3833                         my $action_print = $action ;
3834                         if (defined $opts{-action_extra}) {
3835                                 $action_print = $cgi->a({-href => href(action=>$action)},
3836                                         $action);
3837                         }
3838                         print " / $action_print";
3839                 }
3840                 if (defined $opts{-action_extra}) {
3841                         print " / $opts{-action_extra}";
3842                 }
3843                 print "\n";
3844         }
3845 }
3846
3847 sub print_search_form {
3848         if (!defined $searchtext) {
3849                 $searchtext = "";
3850         }
3851         my $search_hash;
3852         if (defined $hash_base) {
3853                 $search_hash = $hash_base;
3854         } elsif (defined $hash) {
3855                 $search_hash = $hash;
3856         } else {
3857                 $search_hash = "HEAD";
3858         }
3859         my $action = $my_uri;
3860         my $use_pathinfo = gitweb_check_feature('pathinfo');
3861         if ($use_pathinfo) {
3862                 $action .= "/".esc_url($project);
3863         }
3864         print $cgi->startform(-method => "get", -action => $action) .
3865               "<div class=\"search\">\n" .
3866               (!$use_pathinfo &&
3867               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3868               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3869               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3870               $cgi->popup_menu(-name => 'st', -default => 'commit',
3871                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3872               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3873               " search:\n",
3874               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3875               "<span title=\"Extended regular expression\">" .
3876               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3877                              -checked => $search_use_regexp) .
3878               "</span>" .
3879               "</div>" .
3880               $cgi->end_form() . "\n";
3881 }
3882
3883 sub git_header_html {
3884         my $status = shift || "200 OK";
3885         my $expires = shift;
3886         my %opts = @_;
3887
3888         my $title = get_page_title();
3889         my $content_type = get_content_type_html();
3890         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3891                            -status=> $status, -expires => $expires)
3892                 unless ($opts{'-no_http_header'});
3893         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3894         print <<EOF;
3895 <?xml version="1.0" encoding="utf-8"?>
3896 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3897 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3898 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3899 <!-- git core binaries version $git_version -->
3900 <head>
3901 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3902 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3903 <meta name="robots" content="index, nofollow"/>
3904 <title>$title</title>
3905 EOF
3906         # the stylesheet, favicon etc urls won't work correctly with path_info
3907         # unless we set the appropriate base URL
3908         if ($ENV{'PATH_INFO'}) {
3909                 print "<base href=\"".esc_url($base_url)."\" />\n";
3910         }
3911         print_header_links($status);
3912
3913         if (defined $site_html_head_string) {
3914                 print to_utf8($site_html_head_string);
3915         }
3916
3917         print "</head>\n" .
3918               "<body>\n";
3919
3920         if (defined $site_header && -f $site_header) {
3921                 insert_file($site_header);
3922         }
3923
3924         print "<div class=\"page_header\">\n";
3925         if (defined $logo) {
3926                 print $cgi->a({-href => esc_url($logo_url),
3927                                -title => $logo_label},
3928                               $cgi->img({-src => esc_url($logo),
3929                                          -width => 72, -height => 27,
3930                                          -alt => "git",
3931                                          -class => "logo"}));
3932         }
3933         print_nav_breadcrumbs(%opts);
3934         print "</div>\n";
3935
3936         my $have_search = gitweb_check_feature('search');
3937         if (defined $project && $have_search) {
3938                 print_search_form();
3939         }
3940 }
3941
3942 sub git_footer_html {
3943         my $feed_class = 'rss_logo';
3944
3945         print "<div class=\"page_footer\">\n";
3946         if (defined $project) {
3947                 my $descr = git_get_project_description($project);
3948                 if (defined $descr) {
3949                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3950                 }
3951
3952                 my %href_params = get_feed_info();
3953                 if (!%href_params) {
3954                         $feed_class .= ' generic';
3955                 }
3956                 $href_params{'-title'} ||= 'log';
3957
3958                 foreach my $format (qw(RSS Atom)) {
3959                         $href_params{'action'} = lc($format);
3960                         print $cgi->a({-href => href(%href_params),
3961                                       -title => "$href_params{'-title'} $format feed",
3962                                       -class => $feed_class}, $format)."\n";
3963                 }
3964
3965         } else {
3966                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3967                               -class => $feed_class}, "OPML") . " ";
3968                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3969                               -class => $feed_class}, "TXT") . "\n";
3970         }
3971         print "</div>\n"; # class="page_footer"
3972
3973         if (defined $t0 && gitweb_check_feature('timed')) {
3974                 print "<div id=\"generating_info\">\n";
3975                 print 'This page took '.
3976                       '<span id="generating_time" class="time_span">'.
3977                       tv_interval($t0, [ gettimeofday() ]).
3978                       ' seconds </span>'.
3979                       ' and '.
3980                       '<span id="generating_cmd">'.
3981                       $number_of_git_cmds.
3982                       '</span> git commands '.
3983                       " to generate.\n";
3984                 print "</div>\n"; # class="page_footer"
3985         }
3986
3987         if (defined $site_footer && -f $site_footer) {
3988                 insert_file($site_footer);
3989         }
3990
3991         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3992         if (defined $action &&
3993             $action eq 'blame_incremental') {
3994                 print qq!<script type="text/javascript">\n!.
3995                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3996                       qq!           "!. href() .qq!");\n!.
3997                       qq!</script>\n!;
3998         } else {
3999                 my ($jstimezone, $tz_cookie, $datetime_class) =
4000                         gitweb_get_feature('javascript-timezone');
4001
4002                 print qq!<script type="text/javascript">\n!.
4003                       qq!window.onload = function () {\n!;
4004                 if (gitweb_check_feature('javascript-actions')) {
4005                         print qq!       fixLinks();\n!;
4006                 }
4007                 if ($jstimezone && $tz_cookie && $datetime_class) {
4008                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4009                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4010                 }
4011                 print qq!};\n!.
4012                       qq!</script>\n!;
4013         }
4014
4015         print "</body>\n" .
4016               "</html>";
4017 }
4018
4019 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4020 # Example: die_error(404, 'Hash not found')
4021 # By convention, use the following status codes (as defined in RFC 2616):
4022 # 400: Invalid or missing CGI parameters, or
4023 #      requested object exists but has wrong type.
4024 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4025 #      this server or project.
4026 # 404: Requested object/revision/project doesn't exist.
4027 # 500: The server isn't configured properly, or
4028 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4029 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4030 # 503: The server is currently unavailable (because it is overloaded,
4031 #      or down for maintenance).  Generally, this is a temporary state.
4032 sub die_error {
4033         my $status = shift || 500;
4034         my $error = esc_html(shift) || "Internal Server Error";
4035         my $extra = shift;
4036         my %opts = @_;
4037
4038         my %http_responses = (
4039                 400 => '400 Bad Request',
4040                 403 => '403 Forbidden',
4041                 404 => '404 Not Found',
4042                 500 => '500 Internal Server Error',
4043                 503 => '503 Service Unavailable',
4044         );
4045         git_header_html($http_responses{$status}, undef, %opts);
4046         print <<EOF;
4047 <div class="page_body">
4048 <br /><br />
4049 $status - $error
4050 <br />
4051 EOF
4052         if (defined $extra) {
4053                 print "<hr />\n" .
4054                       "$extra\n";
4055         }
4056         print "</div>\n";
4057
4058         git_footer_html();
4059         goto DONE_GITWEB
4060                 unless ($opts{'-error_handler'});
4061 }
4062
4063 ## ----------------------------------------------------------------------
4064 ## functions printing or outputting HTML: navigation
4065
4066 sub git_print_page_nav {
4067         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4068         $extra = '' if !defined $extra; # pager or formats
4069
4070         my @navs = qw(summary shortlog log commit commitdiff tree);
4071         if ($suppress) {
4072                 @navs = grep { $_ ne $suppress } @navs;
4073         }
4074
4075         my %arg = map { $_ => {action=>$_} } @navs;
4076         if (defined $head) {
4077                 for (qw(commit commitdiff)) {
4078                         $arg{$_}{'hash'} = $head;
4079                 }
4080                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4081                         for (qw(shortlog log)) {
4082                                 $arg{$_}{'hash'} = $head;
4083                         }
4084                 }
4085         }
4086
4087         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4088         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4089
4090         my @actions = gitweb_get_feature('actions');
4091         my %repl = (
4092                 '%' => '%',
4093                 'n' => $project,         # project name
4094                 'f' => $git_dir,         # project path within filesystem
4095                 'h' => $treehead || '',  # current hash ('h' parameter)
4096                 'b' => $treebase || '',  # hash base ('hb' parameter)
4097         );
4098         while (@actions) {
4099                 my ($label, $link, $pos) = splice(@actions,0,3);
4100                 # insert
4101                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4102                 # munch munch
4103                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4104                 $arg{$label}{'_href'} = $link;
4105         }
4106
4107         print "<div class=\"page_nav\">\n" .
4108                 (join " | ",
4109                  map { $_ eq $current ?
4110                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4111                  } @navs);
4112         print "<br/>\n$extra<br/>\n" .
4113               "</div>\n";
4114 }
4115
4116 # returns a submenu for the nagivation of the refs views (tags, heads,
4117 # remotes) with the current view disabled and the remotes view only
4118 # available if the feature is enabled
4119 sub format_ref_views {
4120         my ($current) = @_;
4121         my @ref_views = qw{tags heads};
4122         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4123         return join " | ", map {
4124                 $_ eq $current ? $_ :
4125                 $cgi->a({-href => href(action=>$_)}, $_)
4126         } @ref_views
4127 }
4128
4129 sub format_paging_nav {
4130         my ($action, $page, $has_next_link) = @_;
4131         my $paging_nav;
4132
4133
4134         if ($page > 0) {
4135                 $paging_nav .=
4136                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4137                         " &sdot; " .
4138                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4139                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4140         } else {
4141                 $paging_nav .= "first &sdot; prev";
4142         }
4143
4144         if ($has_next_link) {
4145                 $paging_nav .= " &sdot; " .
4146                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4147                                  -accesskey => "n", -title => "Alt-n"}, "next");
4148         } else {
4149                 $paging_nav .= " &sdot; next";
4150         }
4151
4152         return $paging_nav;
4153 }
4154
4155 ## ......................................................................
4156 ## functions printing or outputting HTML: div
4157
4158 sub git_print_header_div {
4159         my ($action, $title, $hash, $hash_base) = @_;
4160         my %args = ();
4161
4162         $args{'action'} = $action;
4163         $args{'hash'} = $hash if $hash;
4164         $args{'hash_base'} = $hash_base if $hash_base;
4165
4166         print "<div class=\"header\">\n" .
4167               $cgi->a({-href => href(%args), -class => "title"},
4168               $title ? $title : $action) .
4169               "\n</div>\n";
4170 }
4171
4172 sub format_repo_url {
4173         my ($name, $url) = @_;
4174         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4175 }
4176
4177 # Group output by placing it in a DIV element and adding a header.
4178 # Options for start_div() can be provided by passing a hash reference as the
4179 # first parameter to the function.
4180 # Options to git_print_header_div() can be provided by passing an array
4181 # reference. This must follow the options to start_div if they are present.
4182 # The content can be a scalar, which is output as-is, a scalar reference, which
4183 # is output after html escaping, an IO handle passed either as *handle or
4184 # *handle{IO}, or a function reference. In the latter case all following
4185 # parameters will be taken as argument to the content function call.
4186 sub git_print_section {
4187         my ($div_args, $header_args, $content);
4188         my $arg = shift;
4189         if (ref($arg) eq 'HASH') {
4190                 $div_args = $arg;
4191                 $arg = shift;
4192         }
4193         if (ref($arg) eq 'ARRAY') {
4194                 $header_args = $arg;
4195                 $arg = shift;
4196         }
4197         $content = $arg;
4198
4199         print $cgi->start_div($div_args);
4200         git_print_header_div(@$header_args);
4201
4202         if (ref($content) eq 'CODE') {
4203                 $content->(@_);
4204         } elsif (ref($content) eq 'SCALAR') {
4205                 print esc_html($$content);
4206         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4207                 print <$content>;
4208         } elsif (!ref($content) && defined($content)) {
4209                 print $content;
4210         }
4211
4212         print $cgi->end_div;
4213 }
4214
4215 sub format_timestamp_html {
4216         my $date = shift;
4217         my $strtime = $date->{'rfc2822'};
4218
4219         my (undef, undef, $datetime_class) =
4220                 gitweb_get_feature('javascript-timezone');
4221         if ($datetime_class) {
4222                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4223         }
4224
4225         my $localtime_format = '(%02d:%02d %s)';
4226         if ($date->{'hour_local'} < 6) {
4227                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4228         }
4229         $strtime .= ' ' .
4230                     sprintf($localtime_format,
4231                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4232
4233         return $strtime;
4234 }
4235
4236 # Outputs the author name and date in long form
4237 sub git_print_authorship {
4238         my $co = shift;
4239         my %opts = @_;
4240         my $tag = $opts{-tag} || 'div';
4241         my $author = $co->{'author_name'};
4242
4243         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4244         print "<$tag class=\"author_date\">" .
4245               format_search_author($author, "author", esc_html($author)) .
4246               " [".format_timestamp_html(\%ad)."]".
4247               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4248               "</$tag>\n";
4249 }
4250
4251 # Outputs table rows containing the full author or committer information,
4252 # in the format expected for 'commit' view (& similar).
4253 # Parameters are a commit hash reference, followed by the list of people
4254 # to output information for. If the list is empty it defaults to both
4255 # author and committer.
4256 sub git_print_authorship_rows {
4257         my $co = shift;
4258         # too bad we can't use @people = @_ || ('author', 'committer')
4259         my @people = @_;
4260         @people = ('author', 'committer') unless @people;
4261         foreach my $who (@people) {
4262                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4263                 print "<tr><td>$who</td><td>" .
4264                       format_search_author($co->{"${who}_name"}, $who,
4265                                            esc_html($co->{"${who}_name"})) . " " .
4266                       format_search_author($co->{"${who}_email"}, $who,
4267                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4268                       "</td><td rowspan=\"2\">" .
4269                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4270                       "</td></tr>\n" .
4271                       "<tr>" .
4272                       "<td></td><td>" .
4273                       format_timestamp_html(\%wd) .
4274                       "</td>" .
4275                       "</tr>\n";
4276         }
4277 }
4278
4279 sub git_print_page_path {
4280         my $name = shift;
4281         my $type = shift;
4282         my $hb = shift;
4283
4284
4285         print "<div class=\"page_path\">";
4286         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4287                       -title => 'tree root'}, to_utf8("[$project]"));
4288         print " / ";
4289         if (defined $name) {
4290                 my @dirname = split '/', $name;
4291                 my $basename = pop @dirname;
4292                 my $fullname = '';
4293
4294                 foreach my $dir (@dirname) {
4295                         $fullname .= ($fullname ? '/' : '') . $dir;
4296                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4297                                                      hash_base=>$hb),
4298                                       -title => $fullname}, esc_path($dir));
4299                         print " / ";
4300                 }
4301                 if (defined $type && $type eq 'blob') {
4302                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4303                                                      hash_base=>$hb),
4304                                       -title => $name}, esc_path($basename));
4305                         if (gitweb_check_feature('highlight')) {
4306                                 print '&nbsp;&nbsp;&nbsp;&nbsp;
4307 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4308 <script>
4309 function toggleLineNumbers() {
4310         e = document.getElementById("lineNoStyle");
4311         e2 = document.getElementById("lineNoToggle");
4312         if (e2.innerHTML == "[Hide line numbers]") {
4313                 e.innerHTML = ".linenr { display:none; }";
4314                 e2.innerHTML = "[Show line numbers]";
4315         }
4316         else {
4317                 e.innerHTML = "";
4318                 e2.innerHTML = "[Hide line numbers]";
4319         }
4320 }
4321 var style = document.createElement("style");
4322 style.setAttribute("id", "lineNoStyle");
4323 document.getElementsByTagName("head")[0].appendChild(style);
4324 toggleLineNumbers();
4325 </script>
4326 ';
4327                         }
4328                 } elsif (defined $type && $type eq 'tree') {
4329                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4330                                                      hash_base=>$hb),
4331                                       -title => $name}, esc_path($basename));
4332                         print " / ";
4333                 } else {
4334                         print esc_path($basename);
4335                 }
4336         }
4337         print "<br/></div>\n";
4338 }
4339
4340 sub git_print_log {
4341         my $log = shift;
4342         my %opts = @_;
4343
4344         if ($opts{'-remove_title'}) {
4345                 # remove title, i.e. first line of log
4346                 shift @$log;
4347         }
4348         # remove leading empty lines
4349         while (defined $log->[0] && $log->[0] eq "") {
4350                 shift @$log;
4351         }
4352
4353         # print log
4354         my $signoff = 0;
4355         my $empty = 0;
4356         foreach my $line (@$log) {
4357                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4358                         $signoff = 1;
4359                         $empty = 0;
4360                         if (! $opts{'-remove_signoff'}) {
4361                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4362                                 next;
4363                         } else {
4364                                 # remove signoff lines
4365                                 next;
4366                         }
4367                 } else {
4368                         $signoff = 0;
4369                 }
4370
4371                 # print only one empty line
4372                 # do not print empty line after signoff
4373                 if ($line eq "") {
4374                         next if ($empty || $signoff);
4375                         $empty = 1;
4376                 } else {
4377                         $empty = 0;
4378                 }
4379
4380                 print format_log_line_html($line) . "<br/>\n";
4381         }
4382
4383         if ($opts{'-final_empty_line'}) {
4384                 # end with single empty line
4385                 print "<br/>\n" unless $empty;
4386         }
4387 }
4388
4389 # return link target (what link points to)
4390 sub git_get_link_target {
4391         my $hash = shift;
4392         my $link_target;
4393
4394         # read link
4395         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4396                 or return;
4397         {
4398                 local $/ = undef;
4399                 $link_target = <$fd>;
4400         }
4401         close $fd
4402                 or return;
4403
4404         return $link_target;
4405 }
4406
4407 # given link target, and the directory (basedir) the link is in,
4408 # return target of link relative to top directory (top tree);
4409 # return undef if it is not possible (including absolute links).
4410 sub normalize_link_target {
4411         my ($link_target, $basedir) = @_;
4412
4413         # absolute symlinks (beginning with '/') cannot be normalized
4414         return if (substr($link_target, 0, 1) eq '/');
4415
4416         # normalize link target to path from top (root) tree (dir)
4417         my $path;
4418         if ($basedir) {
4419                 $path = $basedir . '/' . $link_target;
4420         } else {
4421                 # we are in top (root) tree (dir)
4422                 $path = $link_target;
4423         }
4424
4425         # remove //, /./, and /../
4426         my @path_parts;
4427         foreach my $part (split('/', $path)) {
4428                 # discard '.' and ''
4429                 next if (!$part || $part eq '.');
4430                 # handle '..'
4431                 if ($part eq '..') {
4432                         if (@path_parts) {
4433                                 pop @path_parts;
4434                         } else {
4435                                 # link leads outside repository (outside top dir)
4436                                 return;
4437                         }
4438                 } else {
4439                         push @path_parts, $part;
4440                 }
4441         }
4442         $path = join('/', @path_parts);
4443
4444         return $path;
4445 }
4446
4447 # print tree entry (row of git_tree), but without encompassing <tr> element
4448 sub git_print_tree_entry {
4449         my ($t, $basedir, $hash_base, $have_blame) = @_;
4450
4451         my %base_key = ();
4452         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4453
4454         # The format of a table row is: mode list link.  Where mode is
4455         # the mode of the entry, list is the name of the entry, an href,
4456         # and link is the action links of the entry.
4457
4458         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4459         if (exists $t->{'size'}) {
4460                 print "<td class=\"size\">$t->{'size'}</td>\n";
4461         }
4462         if ($t->{'type'} eq "blob") {
4463                 print "<td class=\"list\">" .
4464                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4465                                                file_name=>"$basedir$t->{'name'}", %base_key),
4466                                 -class => "list"}, esc_path($t->{'name'}));
4467                 if (S_ISLNK(oct $t->{'mode'})) {
4468                         my $link_target = git_get_link_target($t->{'hash'});
4469                         if ($link_target) {
4470                                 my $norm_target = normalize_link_target($link_target, $basedir);
4471                                 if (defined $norm_target) {
4472                                         print " -> " .
4473                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4474                                                                      file_name=>$norm_target),
4475                                                        -title => $norm_target}, esc_path($link_target));
4476                                 } else {
4477                                         print " -> " . esc_path($link_target);
4478                                 }
4479                         }
4480                 }
4481                 print "</td>\n";
4482                 print "<td class=\"link\">";
4483                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4484                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4485                               "blob");
4486                 if ($have_blame) {
4487                         print " | " .
4488                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4489                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4490                                       "blame");
4491                 }
4492                 if (defined $hash_base) {
4493                         print " | " .
4494                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4495                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4496                                       "history");
4497                 }
4498                 print " | " .
4499                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4500                                                file_name=>"$basedir$t->{'name'}")},
4501                                 "raw");
4502                 print "</td>\n";
4503
4504         } elsif ($t->{'type'} eq "tree") {
4505                 print "<td class=\"list\">";
4506                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4507                                              file_name=>"$basedir$t->{'name'}",
4508                                              %base_key)},
4509                               esc_path($t->{'name'}));
4510                 print "</td>\n";
4511                 print "<td class=\"link\">";
4512                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4513                                              file_name=>"$basedir$t->{'name'}",
4514                                              %base_key)},
4515                               "tree");
4516                 if (defined $hash_base) {
4517                         print " | " .
4518                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4519                                                      file_name=>"$basedir$t->{'name'}")},
4520                                       "history");
4521                 }
4522                 print "</td>\n";
4523         } else {
4524                 # unknown object: we can only present history for it
4525                 # (this includes 'commit' object, i.e. submodule support)
4526                 print "<td class=\"list\">" .
4527                       esc_path($t->{'name'}) .
4528                       "</td>\n";
4529                 print "<td class=\"link\">";
4530                 if (defined $hash_base) {
4531                         print $cgi->a({-href => href(action=>"history",
4532                                                      hash_base=>$hash_base,
4533                                                      file_name=>"$basedir$t->{'name'}")},
4534                                       "history");
4535                 }
4536                 print "</td>\n";
4537         }
4538 }
4539
4540 ## ......................................................................
4541 ## functions printing large fragments of HTML
4542
4543 # get pre-image filenames for merge (combined) diff
4544 sub fill_from_file_info {
4545         my ($diff, @parents) = @_;
4546
4547         $diff->{'from_file'} = [ ];
4548         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4549         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4550                 if ($diff->{'status'}[$i] eq 'R' ||
4551                     $diff->{'status'}[$i] eq 'C') {
4552                         $diff->{'from_file'}[$i] =
4553                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4554                 }
4555         }
4556
4557         return $diff;
4558 }
4559
4560 # is current raw difftree line of file deletion
4561 sub is_deleted {
4562         my $diffinfo = shift;
4563
4564         return $diffinfo->{'to_id'} eq ('0' x 40);
4565 }
4566
4567 # does patch correspond to [previous] difftree raw line
4568 # $diffinfo  - hashref of parsed raw diff format
4569 # $patchinfo - hashref of parsed patch diff format
4570 #              (the same keys as in $diffinfo)
4571 sub is_patch_split {
4572         my ($diffinfo, $patchinfo) = @_;
4573
4574         return defined $diffinfo && defined $patchinfo
4575                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4576 }
4577
4578
4579 sub git_difftree_body {
4580         my ($difftree, $hash, @parents) = @_;
4581         my ($parent) = $parents[0];
4582         my $have_blame = gitweb_check_feature('blame');
4583         print "<div class=\"list_head\">\n";
4584         if ($#{$difftree} > 10) {
4585                 print(($#{$difftree} + 1) . " files changed:\n");
4586         }
4587         print "</div>\n";
4588
4589         print "<table class=\"" .
4590               (@parents > 1 ? "combined " : "") .
4591               "diff_tree\">\n";
4592
4593         # header only for combined diff in 'commitdiff' view
4594         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4595         if ($has_header) {
4596                 # table header
4597                 print "<thead><tr>\n" .
4598                        "<th></th><th></th>\n"; # filename, patchN link
4599                 for (my $i = 0; $i < @parents; $i++) {
4600                         my $par = $parents[$i];
4601                         print "<th>" .
4602                               $cgi->a({-href => href(action=>"commitdiff",
4603                                                      hash=>$hash, hash_parent=>$par),
4604                                        -title => 'commitdiff to parent number ' .
4605                                                   ($i+1) . ': ' . substr($par,0,7)},
4606                                       $i+1) .
4607                               "&nbsp;</th>\n";
4608                 }
4609                 print "</tr></thead>\n<tbody>\n";
4610         }
4611
4612         my $alternate = 1;
4613         my $patchno = 0;
4614         foreach my $line (@{$difftree}) {
4615                 my $diff = parsed_difftree_line($line);
4616
4617                 if ($alternate) {
4618                         print "<tr class=\"dark\">\n";
4619                 } else {
4620                         print "<tr class=\"light\">\n";
4621                 }
4622                 $alternate ^= 1;
4623
4624                 if (exists $diff->{'nparents'}) { # combined diff
4625
4626                         fill_from_file_info($diff, @parents)
4627                                 unless exists $diff->{'from_file'};
4628
4629                         if (!is_deleted($diff)) {
4630                                 # file exists in the result (child) commit
4631                                 print "<td>" .
4632                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4633                                                              file_name=>$diff->{'to_file'},
4634                                                              hash_base=>$hash),
4635                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4636                                       "</td>\n";
4637                         } else {
4638                                 print "<td>" .
4639                                       esc_path($diff->{'to_file'}) .
4640                                       "</td>\n";
4641                         }
4642
4643                         if ($action eq 'commitdiff') {
4644                                 # link to patch
4645                                 $patchno++;
4646                                 print "<td class=\"link\">" .
4647                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4648                                               "patch") .
4649                                       " | " .
4650                                       "</td>\n";
4651                         }
4652
4653                         my $has_history = 0;
4654                         my $not_deleted = 0;
4655                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4656                                 my $hash_parent = $parents[$i];
4657                                 my $from_hash = $diff->{'from_id'}[$i];
4658                                 my $from_path = $diff->{'from_file'}[$i];
4659                                 my $status = $diff->{'status'}[$i];
4660
4661                                 $has_history ||= ($status ne 'A');
4662                                 $not_deleted ||= ($status ne 'D');
4663
4664                                 if ($status eq 'A') {
4665                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4666                                 } elsif ($status eq 'D') {
4667                                         print "<td class=\"link\">" .
4668                                               $cgi->a({-href => href(action=>"blob",
4669                                                                      hash_base=>$hash,
4670                                                                      hash=>$from_hash,
4671                                                                      file_name=>$from_path)},
4672                                                       "blob" . ($i+1)) .
4673                                               " | </td>\n";
4674                                 } else {
4675                                         if ($diff->{'to_id'} eq $from_hash) {
4676                                                 print "<td class=\"link nochange\">";
4677                                         } else {
4678                                                 print "<td class=\"link\">";
4679                                         }
4680                                         print $cgi->a({-href => href(action=>"blobdiff",
4681                                                                      hash=>$diff->{'to_id'},
4682                                                                      hash_parent=>$from_hash,
4683                                                                      hash_base=>$hash,
4684                                                                      hash_parent_base=>$hash_parent,
4685                                                                      file_name=>$diff->{'to_file'},
4686                                                                      file_parent=>$from_path)},
4687                                                       "diff" . ($i+1)) .
4688                                               " | </td>\n";
4689                                 }
4690                         }
4691
4692                         print "<td class=\"link\">";
4693                         if ($not_deleted) {
4694                                 print $cgi->a({-href => href(action=>"blob",
4695                                                              hash=>$diff->{'to_id'},
4696                                                              file_name=>$diff->{'to_file'},
4697                                                              hash_base=>$hash)},
4698                                               "blob");
4699                                 print " | " if ($has_history);
4700                         }
4701                         if ($has_history) {
4702                                 print $cgi->a({-href => href(action=>"history",
4703                                                              file_name=>$diff->{'to_file'},
4704                                                              hash_base=>$hash)},
4705                                               "history");
4706                         }
4707                         print "</td>\n";
4708
4709                         print "</tr>\n";
4710                         next; # instead of 'else' clause, to avoid extra indent
4711                 }
4712                 # else ordinary diff
4713
4714                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4715                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4716                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4717                         $to_mode_oct = oct $diff->{'to_mode'};
4718                         if (S_ISREG($to_mode_oct)) { # only for regular file
4719                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4720                         }
4721                         $to_file_type = file_type($diff->{'to_mode'});
4722                 }
4723                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4724                         $from_mode_oct = oct $diff->{'from_mode'};
4725                         if (S_ISREG($from_mode_oct)) { # only for regular file
4726                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4727                         }
4728                         $from_file_type = file_type($diff->{'from_mode'});
4729                 }
4730
4731                 if ($diff->{'status'} eq "A") { # created
4732                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4733                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4734                         $mode_chng   .= "]</span>";
4735                         print "<td>";
4736                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4737                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4738                                       -class => "list"}, esc_path($diff->{'file'}));
4739                         print "</td>\n";
4740                         print "<td>$mode_chng</td>\n";
4741                         print "<td class=\"link\">";
4742                         if ($action eq 'commitdiff') {
4743                                 # link to patch
4744                                 $patchno++;
4745                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4746                                               "patch") .
4747                                       " | ";
4748                         }
4749                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4750                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4751                                       "blob");
4752                         print "</td>\n";
4753
4754                 } elsif ($diff->{'status'} eq "D") { # deleted
4755                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4756                         print "<td>";
4757                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4758                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4759                                        -class => "list"}, esc_path($diff->{'file'}));
4760                         print "</td>\n";
4761                         print "<td>$mode_chng</td>\n";
4762                         print "<td class=\"link\">";
4763                         if ($action eq 'commitdiff') {
4764                                 # link to patch
4765                                 $patchno++;
4766                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4767                                               "patch") .
4768                                       " | ";
4769                         }
4770                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4771                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4772                                       "blob") . " | ";
4773                         if ($have_blame) {
4774                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4775                                                              file_name=>$diff->{'file'})},
4776                                               "blame") . " | ";
4777                         }
4778                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4779                                                      file_name=>$diff->{'file'})},
4780                                       "history");
4781                         print "</td>\n";
4782
4783                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4784                         my $mode_chnge = "";
4785                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4786                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4787                                 if ($from_file_type ne $to_file_type) {
4788                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4789                                 }
4790                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4791                                         if ($from_mode_str && $to_mode_str) {
4792                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4793                                         } elsif ($to_mode_str) {
4794                                                 $mode_chnge .= " mode: $to_mode_str";
4795                                         }
4796                                 }
4797                                 $mode_chnge .= "]</span>\n";
4798                         }
4799                         print "<td>";
4800                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4801                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4802                                       -class => "list"}, esc_path($diff->{'file'}));
4803                         print "</td>\n";
4804                         print "<td>$mode_chnge</td>\n";
4805                         print "<td class=\"link\">";
4806                         if ($action eq 'commitdiff') {
4807                                 # link to patch
4808                                 $patchno++;
4809                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4810                                               "patch") .
4811                                       " | ";
4812                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4813                                 # "commit" view and modified file (not onlu mode changed)
4814                                 print $cgi->a({-href => href(action=>"blobdiff",
4815                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4816                                                              hash_base=>$hash, hash_parent_base=>$parent,
4817                                                              file_name=>$diff->{'file'})},
4818                                               "diff") .
4819                                       " | ";
4820                         }
4821                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4822                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4823                                        "blob") . " | ";
4824                         if ($have_blame) {
4825                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4826                                                              file_name=>$diff->{'file'})},
4827                                               "blame") . " | ";
4828                         }
4829                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4830                                                      file_name=>$diff->{'file'})},
4831                                       "history");
4832                         print "</td>\n";
4833
4834                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4835                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4836                         my $nstatus = $status_name{$diff->{'status'}};
4837                         my $mode_chng = "";
4838                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4839                                 # mode also for directories, so we cannot use $to_mode_str
4840                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4841                         }
4842                         print "<td>" .
4843                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4844                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4845                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4846                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4847                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4848                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4849                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4850                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4851                               "<td class=\"link\">";
4852                         if ($action eq 'commitdiff') {
4853                                 # link to patch
4854                                 $patchno++;
4855                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4856                                               "patch") .
4857                                       " | ";
4858                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4859                                 # "commit" view and modified file (not only pure rename or copy)
4860                                 print $cgi->a({-href => href(action=>"blobdiff",
4861                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4862                                                              hash_base=>$hash, hash_parent_base=>$parent,
4863                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4864                                               "diff") .
4865                                       " | ";
4866                         }
4867                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4868                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4869                                       "blob") . " | ";
4870                         if ($have_blame) {
4871                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4872                                                              file_name=>$diff->{'to_file'})},
4873                                               "blame") . " | ";
4874                         }
4875                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4876                                                     file_name=>$diff->{'to_file'})},
4877                                       "history");
4878                         print "</td>\n";
4879
4880                 } # we should not encounter Unmerged (U) or Unknown (X) status
4881                 print "</tr>\n";
4882         }
4883         print "</tbody>" if $has_header;
4884         print "</table>\n";
4885 }
4886
4887 sub print_sidebyside_diff_chunk {
4888         my @chunk = @_;
4889         my (@ctx, @rem, @add);
4890
4891         return unless @chunk;
4892
4893         # incomplete last line might be among removed or added lines,
4894         # or both, or among context lines: find which
4895         for (my $i = 1; $i < @chunk; $i++) {
4896                 if ($chunk[$i][0] eq 'incomplete') {
4897                         $chunk[$i][0] = $chunk[$i-1][0];
4898                 }
4899         }
4900
4901         # guardian
4902         push @chunk, ["", ""];
4903
4904         foreach my $line_info (@chunk) {
4905                 my ($class, $line) = @$line_info;
4906
4907                 # print chunk headers
4908                 if ($class && $class eq 'chunk_header') {
4909                         print $line;
4910                         next;
4911                 }
4912
4913                 ## print from accumulator when type of class of lines change
4914                 # empty contents block on start rem/add block, or end of chunk
4915                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4916                         print join '',
4917                                 '<div class="chunk_block ctx">',
4918                                         '<div class="old">',
4919                                         @ctx,
4920                                         '</div>',
4921                                         '<div class="new">',
4922                                         @ctx,
4923                                         '</div>',
4924                                 '</div>';
4925                         @ctx = ();
4926                 }
4927                 # empty add/rem block on start context block, or end of chunk
4928                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4929                         if (!@add) {
4930                                 # pure removal
4931                                 print join '',
4932                                         '<div class="chunk_block rem">',
4933                                                 '<div class="old">',
4934                                                 @rem,
4935                                                 '</div>',
4936                                         '</div>';
4937                         } elsif (!@rem) {
4938                                 # pure addition
4939                                 print join '',
4940                                         '<div class="chunk_block add">',
4941                                                 '<div class="new">',
4942                                                 @add,
4943                                                 '</div>',
4944                                         '</div>';
4945                         } else {
4946                                 # assume that it is change
4947                                 print join '',
4948                                         '<div class="chunk_block chg">',
4949                                                 '<div class="old">',
4950                                                 @rem,
4951                                                 '</div>',
4952                                                 '<div class="new">',
4953                                                 @add,
4954                                                 '</div>',
4955                                         '</div>';
4956                         }
4957                         @rem = @add = ();
4958                 }
4959
4960                 ## adding lines to accumulator
4961                 # guardian value
4962                 last unless $line;
4963                 # rem, add or change
4964                 if ($class eq 'rem') {
4965                         push @rem, $line;
4966                 } elsif ($class eq 'add') {
4967                         push @add, $line;
4968                 }
4969                 # context line
4970                 if ($class eq 'ctx') {
4971                         push @ctx, $line;
4972                 }
4973         }
4974 }
4975
4976 sub git_patchset_body {
4977         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4978         my ($hash_parent) = $hash_parents[0];
4979
4980         my $is_combined = (@hash_parents > 1);
4981         my $patch_idx = 0;
4982         my $patch_number = 0;
4983         my $patch_line;
4984         my $diffinfo;
4985         my $to_name;
4986         my (%from, %to);
4987         my @chunk; # for side-by-side diff
4988
4989         print "<div class=\"patchset\">\n";
4990
4991         # skip to first patch
4992         while ($patch_line = <$fd>) {
4993                 chomp $patch_line;
4994
4995                 last if ($patch_line =~ m/^diff /);
4996         }
4997
4998  PATCH:
4999         while ($patch_line) {
5000
5001                 # parse "git diff" header line
5002                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5003                         # $1 is from_name, which we do not use
5004                         $to_name = unquote($2);
5005                         $to_name =~ s!^b/!!;
5006                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5007                         # $1 is 'cc' or 'combined', which we do not use
5008                         $to_name = unquote($2);
5009                 } else {
5010                         $to_name = undef;
5011                 }
5012
5013                 # check if current patch belong to current raw line
5014                 # and parse raw git-diff line if needed
5015                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5016                         # this is continuation of a split patch
5017                         print "<div class=\"patch cont\">\n";
5018                 } else {
5019                         # advance raw git-diff output if needed
5020                         $patch_idx++ if defined $diffinfo;
5021
5022                         # read and prepare patch information
5023                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5024
5025                         # compact combined diff output can have some patches skipped
5026                         # find which patch (using pathname of result) we are at now;
5027                         if ($is_combined) {
5028                                 while ($to_name ne $diffinfo->{'to_file'}) {
5029                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5030                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5031                                               "</div>\n";  # class="patch"
5032
5033                                         $patch_idx++;
5034                                         $patch_number++;
5035
5036                                         last if $patch_idx > $#$difftree;
5037                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5038                                 }
5039                         }
5040
5041                         # modifies %from, %to hashes
5042                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5043
5044                         # this is first patch for raw difftree line with $patch_idx index
5045                         # we index @$difftree array from 0, but number patches from 1
5046                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5047                 }
5048
5049                 # git diff header
5050                 #assert($patch_line =~ m/^diff /) if DEBUG;
5051                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5052                 $patch_number++;
5053                 # print "git diff" header
5054                 print format_git_diff_header_line($patch_line, $diffinfo,
5055                                                   \%from, \%to);
5056
5057                 # print extended diff header
5058                 print "<div class=\"diff extended_header\">\n";
5059         EXTENDED_HEADER:
5060                 while ($patch_line = <$fd>) {
5061                         chomp $patch_line;
5062
5063                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5064
5065                         print format_extended_diff_header_line($patch_line, $diffinfo,
5066                                                                \%from, \%to);
5067                 }
5068                 print "</div>\n"; # class="diff extended_header"
5069
5070                 # from-file/to-file diff header
5071                 if (! $patch_line) {
5072                         print "</div>\n"; # class="patch"
5073                         last PATCH;
5074                 }
5075                 next PATCH if ($patch_line =~ m/^diff /);
5076                 #assert($patch_line =~ m/^---/) if DEBUG;
5077
5078                 my $last_patch_line = $patch_line;
5079                 $patch_line = <$fd>;
5080                 chomp $patch_line;
5081                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5082
5083                 print format_diff_from_to_header($last_patch_line, $patch_line,
5084                                                  $diffinfo, \%from, \%to,
5085                                                  @hash_parents);
5086
5087                 # the patch itself
5088         LINE:
5089                 while ($patch_line = <$fd>) {
5090                         chomp $patch_line;
5091
5092                         next PATCH if ($patch_line =~ m/^diff /);
5093
5094                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5095                         my $diff_classes = "diff";
5096                         $diff_classes .= " $class" if ($class);
5097                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5098
5099                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5100                                 if ($class eq 'chunk_header') {
5101                                         print_sidebyside_diff_chunk(@chunk);
5102                                         @chunk = ( [ $class, $line ] );
5103                                 } else {
5104                                         push @chunk, [ $class, $line ];
5105                                 }
5106                         } else {
5107                                 # default 'inline' style and unknown styles
5108                                 print $line;
5109                         }
5110                 }
5111
5112         } continue {
5113                 if (@chunk) {
5114                         print_sidebyside_diff_chunk(@chunk);
5115                         @chunk = ();
5116                 }
5117                 print "</div>\n"; # class="patch"
5118         }
5119
5120         # for compact combined (--cc) format, with chunk and patch simplification
5121         # the patchset might be empty, but there might be unprocessed raw lines
5122         for (++$patch_idx if $patch_number > 0;
5123              $patch_idx < @$difftree;
5124              ++$patch_idx) {
5125                 # read and prepare patch information
5126                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5127
5128                 # generate anchor for "patch" links in difftree / whatchanged part
5129                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5130                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5131                       "</div>\n";  # class="patch"
5132
5133                 $patch_number++;
5134         }
5135
5136         if ($patch_number == 0) {
5137                 if (@hash_parents > 1) {
5138                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5139                 } else {
5140                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5141                 }
5142         }
5143
5144         print "</div>\n"; # class="patchset"
5145 }
5146
5147 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5148
5149 # fills project list info (age, description, owner, category, forks)
5150 # for each project in the list, removing invalid projects from
5151 # returned list
5152 # NOTE: modifies $projlist, but does not remove entries from it
5153 sub fill_project_list_info {
5154         my $projlist = shift;
5155         my @projects;
5156
5157         my $show_ctags = gitweb_check_feature('ctags');
5158  PROJECT:
5159         foreach my $pr (@$projlist) {
5160                 my (@activity) = git_get_last_activity($pr->{'path'});
5161                 unless (@activity) {
5162                         next PROJECT;
5163                 }
5164                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5165                 if (!defined $pr->{'descr'}) {
5166                         my $descr = git_get_project_description($pr->{'path'}) || "";
5167                         $descr = to_utf8($descr);
5168                         $pr->{'descr_long'} = $descr;
5169                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5170                 }
5171                 if (!defined $pr->{'owner'}) {
5172                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5173                 }
5174                 if ($show_ctags) {
5175                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5176                 }
5177                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5178                         my $cat = git_get_project_category($pr->{'path'}) ||
5179                                                            $project_list_default_category;
5180                         $pr->{'category'} = to_utf8($cat);
5181                 }
5182
5183                 push @projects, $pr;
5184         }
5185
5186         return @projects;
5187 }
5188
5189 sub sort_projects_list {
5190         my ($projlist, $order) = @_;
5191         my @projects;
5192
5193         my %order_info = (
5194                 project => { key => 'path', type => 'str' },
5195                 descr => { key => 'descr_long', type => 'str' },
5196                 owner => { key => 'owner', type => 'str' },
5197                 age => { key => 'age', type => 'num' }
5198         );
5199         my $oi = $order_info{$order};
5200         return @$projlist unless defined $oi;
5201         if ($oi->{'type'} eq 'str') {
5202                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5203         } else {
5204                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5205         }
5206
5207         return @projects;
5208 }
5209
5210 # returns a hash of categories, containing the list of project
5211 # belonging to each category
5212 sub build_projlist_by_category {
5213         my ($projlist, $from, $to) = @_;
5214         my %categories;
5215
5216         $from = 0 unless defined $from;
5217         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5218
5219         for (my $i = $from; $i <= $to; $i++) {
5220                 my $pr = $projlist->[$i];
5221                 push @{$categories{ $pr->{'category'} }}, $pr;
5222         }
5223
5224         return wantarray ? %categories : \%categories;
5225 }
5226
5227 # print 'sort by' <th> element, generating 'sort by $name' replay link
5228 # if that order is not selected
5229 sub print_sort_th {
5230         print format_sort_th(@_);
5231 }
5232
5233 sub format_sort_th {
5234         my ($name, $order, $header) = @_;
5235         my $sort_th = "";
5236         $header ||= ucfirst($name);
5237
5238         if ($order eq $name) {
5239                 $sort_th .= "<th>$header</th>\n";
5240         } else {
5241                 $sort_th .= "<th>" .
5242                             $cgi->a({-href => href(-replay=>1, order=>$name),
5243                                      -class => "header"}, $header) .
5244                             "</th>\n";
5245         }
5246
5247         return $sort_th;
5248 }
5249
5250 sub git_project_list_rows {
5251         my ($projlist, $from, $to, $check_forks) = @_;
5252
5253         $from = 0 unless defined $from;
5254         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5255
5256         my $alternate = 1;
5257         for (my $i = $from; $i <= $to; $i++) {
5258                 my $pr = $projlist->[$i];
5259
5260                 if ($alternate) {
5261                         print "<tr class=\"dark\">\n";
5262                 } else {
5263                         print "<tr class=\"light\">\n";
5264                 }
5265                 $alternate ^= 1;
5266
5267                 if ($check_forks) {
5268                         print "<td>";
5269                         if ($pr->{'forks'}) {
5270                                 my $nforks = scalar @{$pr->{'forks'}};
5271                                 if ($nforks > 0) {
5272                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5273                                                        -title => "$nforks forks"}, "+");
5274                                 } else {
5275                                         print $cgi->span({-title => "$nforks forks"}, "+");
5276                                 }
5277                         }
5278                         print "</td>\n";
5279                 }
5280                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5281                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5282                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5283                                         -class => "list", -title => $pr->{'descr_long'}},
5284                                         esc_html($pr->{'descr'})) . "</td>\n" .
5285                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5286                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5287                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5288                       "<td class=\"link\">" .
5289                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5290                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5291                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5292                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5293                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5294                       "</td>\n" .
5295                       "</tr>\n";
5296         }
5297 }
5298
5299 sub git_project_list_body {
5300         # actually uses global variable $project
5301         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5302         my @projects = @$projlist;
5303
5304         my $check_forks = gitweb_check_feature('forks');
5305         my $show_ctags  = gitweb_check_feature('ctags');
5306         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5307         $check_forks = undef
5308                 if ($tagfilter || $searchtext);
5309
5310         # filtering out forks before filling info allows to do less work
5311         @projects = filter_forks_from_projects_list(\@projects)
5312                 if ($check_forks);
5313         @projects = fill_project_list_info(\@projects);
5314         # searching projects require filling to be run before it
5315         @projects = search_projects_list(\@projects,
5316                                          'searchtext' => $searchtext,
5317                                          'tagfilter'  => $tagfilter)
5318                 if ($tagfilter || $searchtext);
5319
5320         $order ||= $default_projects_order;
5321         $from = 0 unless defined $from;
5322         $to = $#projects if (!defined $to || $#projects < $to);
5323
5324         # short circuit
5325         if ($from > $to) {
5326                 print "<center>\n".
5327                       "<b>No such projects found</b><br />\n".
5328                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5329                       "</center>\n<br />\n";
5330                 return;
5331         }
5332
5333         @projects = sort_projects_list(\@projects, $order);
5334
5335         if ($show_ctags) {
5336                 my $ctags = git_gather_all_ctags(\@projects);
5337                 my $cloud = git_populate_project_tagcloud($ctags);
5338                 print git_show_project_tagcloud($cloud, 64);
5339         }
5340
5341         print "<table class=\"project_list\">\n";
5342         unless ($no_header) {
5343                 print "<tr>\n";
5344                 if ($check_forks) {
5345                         print "<th></th>\n";
5346                 }
5347                 print_sort_th('project', $order, 'Project');
5348                 print_sort_th('descr', $order, 'Description');
5349                 print_sort_th('owner', $order, 'Owner');
5350                 print_sort_th('age', $order, 'Last Change');
5351                 print "<th></th>\n" . # for links
5352                       "</tr>\n";
5353         }
5354
5355         if ($projects_list_group_categories) {
5356                 # only display categories with projects in the $from-$to window
5357                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5358                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5359                 foreach my $cat (sort keys %categories) {
5360                         unless ($cat eq "") {
5361                                 print "<tr>\n";
5362                                 if ($check_forks) {
5363                                         print "<td></td>\n";
5364                                 }
5365                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5366                                 print "</tr>\n";
5367                         }
5368
5369                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5370                 }
5371         } else {
5372                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5373         }
5374
5375         if (defined $extra) {
5376                 print "<tr>\n";
5377                 if ($check_forks) {
5378                         print "<td></td>\n";
5379                 }
5380                 print "<td colspan=\"5\">$extra</td>\n" .
5381                       "</tr>\n";
5382         }
5383         print "</table>\n";
5384 }
5385
5386 sub git_log_body {
5387         # uses global variable $project
5388         my ($commitlist, $from, $to, $refs, $extra) = @_;
5389
5390         $from = 0 unless defined $from;
5391         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5392
5393         for (my $i = 0; $i <= $to; $i++) {
5394                 my %co = %{$commitlist->[$i]};
5395                 next if !%co;
5396                 my $commit = $co{'id'};
5397                 my $ref = format_ref_marker($refs, $commit);
5398                 git_print_header_div('commit',
5399                                "<span class=\"age\">$co{'age_string'}</span>" .
5400                                esc_html($co{'title'}) . $ref,
5401                                $commit);
5402                 print "<div class=\"title_text\">\n" .
5403                       "<div class=\"log_link\">\n" .
5404                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5405                       " | " .
5406                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5407                       " | " .
5408                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5409                       "<br/>\n" .
5410                       "</div>\n";
5411                       git_print_authorship(\%co, -tag => 'span');
5412                       print "<br/>\n</div>\n";
5413
5414                 print "<div class=\"log_body\">\n";
5415                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5416                 print "</div>\n";
5417         }
5418         if ($extra) {
5419                 print "<div class=\"page_nav\">\n";
5420                 print "$extra\n";
5421                 print "</div>\n";
5422         }
5423 }
5424
5425 sub git_shortlog_body {
5426         # uses global variable $project
5427         my ($commitlist, $from, $to, $refs, $extra) = @_;
5428
5429         $from = 0 unless defined $from;
5430         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5431
5432         print "<table class=\"shortlog\">\n";
5433         my $alternate = 1;
5434         for (my $i = $from; $i <= $to; $i++) {
5435                 my %co = %{$commitlist->[$i]};
5436                 my $commit = $co{'id'};
5437                 my $ref = format_ref_marker($refs, $commit);
5438                 if ($alternate) {
5439                         print "<tr class=\"dark\">\n";
5440                 } else {
5441                         print "<tr class=\"light\">\n";
5442                 }
5443                 $alternate ^= 1;
5444                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5445                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5446                       format_author_html('td', \%co, 10) . "<td>";
5447                 print format_subject_html($co{'title'}, $co{'title_short'},
5448                                           href(action=>"commit", hash=>$commit), $ref);
5449                 print "</td>\n" .
5450                       "<td class=\"link\">" .
5451                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5452                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5453                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5454                 my $snapshot_links = format_snapshot_links($commit);
5455                 if (defined $snapshot_links) {
5456                         print " | " . $snapshot_links;
5457                 }
5458                 print "</td>\n" .
5459                       "</tr>\n";
5460         }
5461         if (defined $extra) {
5462                 print "<tr>\n" .
5463                       "<td colspan=\"4\">$extra</td>\n" .
5464                       "</tr>\n";
5465         }
5466         print "</table>\n";
5467 }
5468
5469 sub git_history_body {
5470         # Warning: assumes constant type (blob or tree) during history
5471         my ($commitlist, $from, $to, $refs, $extra,
5472             $file_name, $file_hash, $ftype) = @_;
5473
5474         $from = 0 unless defined $from;
5475         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5476
5477         print "<table class=\"history\">\n";
5478         my $alternate = 1;
5479         for (my $i = $from; $i <= $to; $i++) {
5480                 my %co = %{$commitlist->[$i]};
5481                 if (!%co) {
5482                         next;
5483                 }
5484                 my $commit = $co{'id'};
5485
5486                 my $ref = format_ref_marker($refs, $commit);
5487
5488                 if ($alternate) {
5489                         print "<tr class=\"dark\">\n";
5490                 } else {
5491                         print "<tr class=\"light\">\n";
5492                 }
5493                 $alternate ^= 1;
5494                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5495         # shortlog:   format_author_html('td', \%co, 10)
5496                       format_author_html('td', \%co, 15, 3) . "<td>";
5497                 # originally git_history used chop_str($co{'title'}, 50)
5498                 print format_subject_html($co{'title'}, $co{'title_short'},
5499                                           href(action=>"commit", hash=>$commit), $ref);
5500                 print "</td>\n" .
5501                       "<td class=\"link\">" .
5502                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5503                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5504
5505                 if ($ftype eq 'blob') {
5506                         my $blob_current = $file_hash;
5507                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5508                         if (defined $blob_current && defined $blob_parent &&
5509                                         $blob_current ne $blob_parent) {
5510                                 print " | " .
5511                                         $cgi->a({-href => href(action=>"blobdiff",
5512                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5513                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5514                                                                file_name=>$file_name)},
5515                                                 "diff to current");
5516                         }
5517                 }
5518                 print "</td>\n" .
5519                       "</tr>\n";
5520         }
5521         if (defined $extra) {
5522                 print "<tr>\n" .
5523                       "<td colspan=\"4\">$extra</td>\n" .
5524                       "</tr>\n";
5525         }
5526         print "</table>\n";
5527 }
5528
5529 sub git_tags_body {
5530         # uses global variable $project
5531         my ($taglist, $from, $to, $extra) = @_;
5532         $from = 0 unless defined $from;
5533         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5534
5535         print "<table class=\"tags\">\n";
5536         my $alternate = 1;
5537         for (my $i = $from; $i <= $to; $i++) {
5538                 my $entry = $taglist->[$i];
5539                 my %tag = %$entry;
5540                 my $comment = $tag{'subject'};
5541                 my $comment_short;
5542                 if (defined $comment) {
5543                         $comment_short = chop_str($comment, 30, 5);
5544                 }
5545                 if ($alternate) {
5546                         print "<tr class=\"dark\">\n";
5547                 } else {
5548                         print "<tr class=\"light\">\n";
5549                 }
5550                 $alternate ^= 1;
5551                 if (defined $tag{'age'}) {
5552                         print "<td><i>$tag{'age'}</i></td>\n";
5553                 } else {
5554                         print "<td></td>\n";
5555                 }
5556                 print "<td>" .
5557                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5558                                -class => "list name"}, esc_html($tag{'name'})) .
5559                       "</td>\n" .
5560                       "<td>";
5561                 if (defined $comment) {
5562                         print format_subject_html($comment, $comment_short,
5563                                                   href(action=>"tag", hash=>$tag{'id'}));
5564                 }
5565                 print "</td>\n" .
5566                       "<td class=\"selflink\">";
5567                 if ($tag{'type'} eq "tag") {
5568                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5569                 } else {
5570                         print "&nbsp;";
5571                 }
5572                 print "</td>\n" .
5573                       "<td class=\"link\">" . " | " .
5574                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5575                 if ($tag{'reftype'} eq "commit") {
5576                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5577                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5578                 } elsif ($tag{'reftype'} eq "blob") {
5579                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5580                 }
5581                 print "</td>\n" .
5582                       "</tr>";
5583         }
5584         if (defined $extra) {
5585                 print "<tr>\n" .
5586                       "<td colspan=\"5\">$extra</td>\n" .
5587                       "</tr>\n";
5588         }
5589         print "</table>\n";
5590 }
5591
5592 sub git_heads_body {
5593         # uses global variable $project
5594         my ($headlist, $head, $from, $to, $extra) = @_;
5595         $from = 0 unless defined $from;
5596         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5597
5598         print "<table class=\"heads\">\n";
5599         my $alternate = 1;
5600         for (my $i = $from; $i <= $to; $i++) {
5601                 my $entry = $headlist->[$i];
5602                 my %ref = %$entry;
5603                 my $curr = $ref{'id'} eq $head;
5604                 if ($alternate) {
5605                         print "<tr class=\"dark\">\n";
5606                 } else {
5607                         print "<tr class=\"light\">\n";
5608                 }
5609                 $alternate ^= 1;
5610                 print "<td><i>$ref{'age'}</i></td>\n" .
5611                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5612                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5613                                -class => "list name"},esc_html($ref{'name'})) .
5614                       "</td>\n" .
5615                       "<td class=\"link\">" .
5616                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5617                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5618                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5619                       "</td>\n" .
5620                       "</tr>";
5621         }
5622         if (defined $extra) {
5623                 print "<tr>\n" .
5624                       "<td colspan=\"3\">$extra</td>\n" .
5625                       "</tr>\n";
5626         }
5627         print "</table>\n";
5628 }
5629
5630 # Display a single remote block
5631 sub git_remote_block {
5632         my ($remote, $rdata, $limit, $head) = @_;
5633
5634         my $heads = $rdata->{'heads'};
5635         my $fetch = $rdata->{'fetch'};
5636         my $push = $rdata->{'push'};
5637
5638         my $urls_table = "<table class=\"projects_list\">\n" ;
5639
5640         if (defined $fetch) {
5641                 if ($fetch eq $push) {
5642                         $urls_table .= format_repo_url("URL", $fetch);
5643                 } else {
5644                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5645                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5646                 }
5647         } elsif (defined $push) {
5648                 $urls_table .= format_repo_url("Push URL", $push);
5649         } else {
5650                 $urls_table .= format_repo_url("", "No remote URL");
5651         }
5652
5653         $urls_table .= "</table>\n";
5654
5655         my $dots;
5656         if (defined $limit && $limit < @$heads) {
5657                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5658         }
5659
5660         print $urls_table;
5661         git_heads_body($heads, $head, 0, $limit, $dots);
5662 }
5663
5664 # Display a list of remote names with the respective fetch and push URLs
5665 sub git_remotes_list {
5666         my ($remotedata, $limit) = @_;
5667         print "<table class=\"heads\">\n";
5668         my $alternate = 1;
5669         my @remotes = sort keys %$remotedata;
5670
5671         my $limited = $limit && $limit < @remotes;
5672
5673         $#remotes = $limit - 1 if $limited;
5674
5675         while (my $remote = shift @remotes) {
5676                 my $rdata = $remotedata->{$remote};
5677                 my $fetch = $rdata->{'fetch'};
5678                 my $push = $rdata->{'push'};
5679                 if ($alternate) {
5680                         print "<tr class=\"dark\">\n";
5681                 } else {
5682                         print "<tr class=\"light\">\n";
5683                 }
5684                 $alternate ^= 1;
5685                 print "<td>" .
5686                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5687                                -class=> "list name"},esc_html($remote)) .
5688                       "</td>";
5689                 print "<td class=\"link\">" .
5690                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5691                       " | " .
5692                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5693                       "</td>";
5694
5695                 print "</tr>\n";
5696         }
5697
5698         if ($limited) {
5699                 print "<tr>\n" .
5700                       "<td colspan=\"3\">" .
5701                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5702                       "</td>\n" . "</tr>\n";
5703         }
5704
5705         print "</table>";
5706 }
5707
5708 # Display remote heads grouped by remote, unless there are too many
5709 # remotes, in which case we only display the remote names
5710 sub git_remotes_body {
5711         my ($remotedata, $limit, $head) = @_;
5712         if ($limit and $limit < keys %$remotedata) {
5713                 git_remotes_list($remotedata, $limit);
5714         } else {
5715                 fill_remote_heads($remotedata);
5716                 while (my ($remote, $rdata) = each %$remotedata) {
5717                         git_print_section({-class=>"remote", -id=>$remote},
5718                                 ["remotes", $remote, $remote], sub {
5719                                         git_remote_block($remote, $rdata, $limit, $head);
5720                                 });
5721                 }
5722         }
5723 }
5724
5725 sub git_search_message {
5726         my %co = @_;
5727
5728         my $greptype;
5729         if ($searchtype eq 'commit') {
5730                 $greptype = "--grep=";
5731         } elsif ($searchtype eq 'author') {
5732                 $greptype = "--author=";
5733         } elsif ($searchtype eq 'committer') {
5734                 $greptype = "--committer=";
5735         }
5736         $greptype .= $searchtext;
5737         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5738                                        $greptype, '--regexp-ignore-case',
5739                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5740
5741         my $paging_nav = '';
5742         if ($page > 0) {
5743                 $paging_nav .=
5744                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5745                                 "first") .
5746                         " &sdot; " .
5747                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5748                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5749         } else {
5750                 $paging_nav .= "first &sdot; prev";
5751         }
5752         my $next_link = '';
5753         if ($#commitlist >= 100) {
5754                 $next_link =
5755                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5756                                  -accesskey => "n", -title => "Alt-n"}, "next");
5757                 $paging_nav .= " &sdot; $next_link";
5758         } else {
5759                 $paging_nav .= " &sdot; next";
5760         }
5761
5762         git_header_html();
5763
5764         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5765         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5766         if ($page == 0 && !@commitlist) {
5767                 print "<p>No match.</p>\n";
5768         } else {
5769                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5770         }
5771
5772         git_footer_html();
5773 }
5774
5775 sub git_search_changes {
5776         my %co = @_;
5777
5778         local $/ = "\n";
5779         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5780                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5781                 ($search_use_regexp ? '--pickaxe-regex' : ())
5782                         or die_error(500, "Open git-log failed");
5783
5784         git_header_html();
5785
5786         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5787         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5788
5789         print "<table class=\"pickaxe search\">\n";
5790         my $alternate = 1;
5791         undef %co;
5792         my @files;
5793         while (my $line = <$fd>) {
5794                 chomp $line;
5795                 next unless $line;
5796
5797                 my %set = parse_difftree_raw_line($line);
5798                 if (defined $set{'commit'}) {
5799                         # finish previous commit
5800                         if (%co) {
5801                                 print "</td>\n" .
5802                                       "<td class=\"link\">" .
5803                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5804                                               "commit") .
5805                                       " | " .
5806                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5807                                                              hash_base=>$co{'id'})},
5808                                               "tree") .
5809                                       "</td>\n" .
5810                                       "</tr>\n";
5811                         }
5812
5813                         if ($alternate) {
5814                                 print "<tr class=\"dark\">\n";
5815                         } else {
5816                                 print "<tr class=\"light\">\n";
5817                         }
5818                         $alternate ^= 1;
5819                         %co = parse_commit($set{'commit'});
5820                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5821                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5822                               "<td><i>$author</i></td>\n" .
5823                               "<td>" .
5824                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5825                                       -class => "list subject"},
5826                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5827                 } elsif (defined $set{'to_id'}) {
5828                         next if ($set{'to_id'} =~ m/^0{40}$/);
5829
5830                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5831                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5832                                       -class => "list"},
5833                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5834                               "<br/>\n";
5835                 }
5836         }
5837         close $fd;
5838
5839         # finish last commit (warning: repetition!)
5840         if (%co) {
5841                 print "</td>\n" .
5842                       "<td class=\"link\">" .
5843                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5844                               "commit") .
5845                       " | " .
5846                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5847                                              hash_base=>$co{'id'})},
5848                               "tree") .
5849                       "</td>\n" .
5850                       "</tr>\n";
5851         }
5852
5853         print "</table>\n";
5854
5855         git_footer_html();
5856 }
5857
5858 sub git_search_files {
5859         my %co = @_;
5860
5861         local $/ = "\n";
5862         open my $fd, "-|", git_cmd(), 'grep', '-n',
5863                 $search_use_regexp ? ('-E', '-i') : '-F',
5864                 $searchtext, $co{'tree'}
5865                         or die_error(500, "Open git-grep failed");
5866
5867         git_header_html();
5868
5869         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5870         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5871
5872         print "<table class=\"grep_search\">\n";
5873         my $alternate = 1;
5874         my $matches = 0;
5875         my $lastfile = '';
5876         while (my $line = <$fd>) {
5877                 chomp $line;
5878                 my ($file, $lno, $ltext, $binary);
5879                 last if ($matches++ > 1000);
5880                 if ($line =~ /^Binary file (.+) matches$/) {
5881                         $file = $1;
5882                         $binary = 1;
5883                 } else {
5884                         (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5885                 }
5886                 if ($file ne $lastfile) {
5887                         $lastfile and print "</td></tr>\n";
5888                         if ($alternate++) {
5889                                 print "<tr class=\"dark\">\n";
5890                         } else {
5891                                 print "<tr class=\"light\">\n";
5892                         }
5893                         print "<td class=\"list\">".
5894                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5895                                                        file_name=>"$file"),
5896                                         -class => "list"}, esc_path($file));
5897                         print "</td><td>\n";
5898                         $lastfile = $file;
5899                 }
5900                 if ($binary) {
5901                         print "<div class=\"binary\">Binary file</div>\n";
5902                 } else {
5903                         $ltext = untabify($ltext);
5904                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5905                                 $ltext = esc_html($1, -nbsp=>1);
5906                                 $ltext .= '<span class="match">';
5907                                 $ltext .= esc_html($2, -nbsp=>1);
5908                                 $ltext .= '</span>';
5909                                 $ltext .= esc_html($3, -nbsp=>1);
5910                         } else {
5911                                 $ltext = esc_html($ltext, -nbsp=>1);
5912                         }
5913                         print "<div class=\"pre\">" .
5914                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5915                                                        file_name=>"$file").'#l'.$lno,
5916                                         -class => "linenr"}, sprintf('%4i', $lno))
5917                                 . ' ' .  $ltext . "</div>\n";
5918                 }
5919         }
5920         if ($lastfile) {
5921                 print "</td></tr>\n";
5922                 if ($matches > 1000) {
5923                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5924                 }
5925         } else {
5926                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5927         }
5928         close $fd;
5929
5930         print "</table>\n";
5931
5932         git_footer_html();
5933 }
5934
5935 sub git_search_grep_body {
5936         my ($commitlist, $from, $to, $extra) = @_;
5937         $from = 0 unless defined $from;
5938         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5939
5940         print "<table class=\"commit_search\">\n";
5941         my $alternate = 1;
5942         for (my $i = $from; $i <= $to; $i++) {
5943                 my %co = %{$commitlist->[$i]};
5944                 if (!%co) {
5945                         next;
5946                 }
5947                 my $commit = $co{'id'};
5948                 if ($alternate) {
5949                         print "<tr class=\"dark\">\n";
5950                 } else {
5951                         print "<tr class=\"light\">\n";
5952                 }
5953                 $alternate ^= 1;
5954                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5955                       format_author_html('td', \%co, 15, 5) .
5956                       "<td>" .
5957                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5958                                -class => "list subject"},
5959                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5960                 my $comment = $co{'comment'};
5961                 foreach my $line (@$comment) {
5962                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5963                                 my ($lead, $match, $trail) = ($1, $2, $3);
5964                                 $match = chop_str($match, 70, 5, 'center');
5965                                 my $contextlen = int((80 - length($match))/2);
5966                                 $contextlen = 30 if ($contextlen > 30);
5967                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5968                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5969
5970                                 $lead  = esc_html($lead);
5971                                 $match = esc_html($match);
5972                                 $trail = esc_html($trail);
5973
5974                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5975                         }
5976                 }
5977                 print "</td>\n" .
5978                       "<td class=\"link\">" .
5979                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5980                       " | " .
5981                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5982                       " | " .
5983                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5984                 print "</td>\n" .
5985                       "</tr>\n";
5986         }
5987         if (defined $extra) {
5988                 print "<tr>\n" .
5989                       "<td colspan=\"3\">$extra</td>\n" .
5990                       "</tr>\n";
5991         }
5992         print "</table>\n";
5993 }
5994
5995 ## ======================================================================
5996 ## ======================================================================
5997 ## actions
5998
5999 sub git_project_list {
6000         my $order = $input_params{'order'};
6001         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6002                 die_error(400, "Unknown order parameter");
6003         }
6004
6005         my @list = git_get_projects_list();
6006         if (!@list) {
6007                 die_error(404, "No projects found");
6008         }
6009
6010         git_header_html();
6011         if (defined $home_text && -f $home_text) {
6012                 print "<div class=\"index_include\">\n";
6013                 insert_file($home_text);
6014                 print "</div>\n";
6015         }
6016         print $cgi->startform(-method => "get") .
6017               "<p class=\"projsearch\">Search:\n" .
6018               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6019               "</p>" .
6020               $cgi->end_form() . "\n";
6021         git_project_list_body(\@list, $order);
6022         git_footer_html();
6023 }
6024
6025 sub git_forks {
6026         my $order = $input_params{'order'};
6027         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6028                 die_error(400, "Unknown order parameter");
6029         }
6030
6031         my @list = git_get_projects_list($project);
6032         if (!@list) {
6033                 die_error(404, "No forks found");
6034         }
6035
6036         git_header_html();
6037         git_print_page_nav('','');
6038         git_print_header_div('summary', "$project forks");
6039         git_project_list_body(\@list, $order);
6040         git_footer_html();
6041 }
6042
6043 sub git_project_index {
6044         my @projects = git_get_projects_list();
6045         if (!@projects) {
6046                 die_error(404, "No projects found");
6047         }
6048
6049         print $cgi->header(
6050                 -type => 'text/plain',
6051                 -charset => 'utf-8',
6052                 -content_disposition => 'inline; filename="index.aux"');
6053
6054         foreach my $pr (@projects) {
6055                 if (!exists $pr->{'owner'}) {
6056                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6057                 }
6058
6059                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6060                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6061                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6062                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6063                 $path  =~ s/ /\+/g;
6064                 $owner =~ s/ /\+/g;
6065
6066                 print "$path $owner\n";
6067         }
6068 }
6069
6070 sub git_summary {
6071         my $descr = git_get_project_description($project) || "none";
6072         my %co = parse_commit("HEAD");
6073         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6074         my $head = $co{'id'};
6075         my $remote_heads = gitweb_check_feature('remote_heads');
6076
6077         my $owner = git_get_project_owner($project);
6078
6079         my $refs = git_get_references();
6080         # These get_*_list functions return one more to allow us to see if
6081         # there are more ...
6082         my @taglist  = git_get_tags_list(16);
6083         my @headlist = git_get_heads_list(16);
6084         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6085         my @forklist;
6086         my $check_forks = gitweb_check_feature('forks');
6087
6088         if ($check_forks) {
6089                 # find forks of a project
6090                 @forklist = git_get_projects_list($project);
6091                 # filter out forks of forks
6092                 @forklist = filter_forks_from_projects_list(\@forklist)
6093                         if (@forklist);
6094         }
6095
6096         git_header_html();
6097         git_print_page_nav('summary','', $head);
6098
6099         print "<div class=\"title\">&nbsp;</div>\n";
6100         print "<table class=\"projects_list\">\n" .
6101               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6102               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6103         if (defined $cd{'rfc2822'}) {
6104                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6105                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6106         }
6107
6108         # use per project git URL list in $projectroot/$project/cloneurl
6109         # or make project git URL from git base URL and project name
6110         my $url_tag = "URL";
6111         my @url_list = git_get_project_url_list($project);
6112         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6113         foreach my $git_url (@url_list) {
6114                 next unless $git_url;
6115                 print format_repo_url($url_tag, $git_url);
6116                 $url_tag = "";
6117         }
6118
6119         # Tag cloud
6120         my $show_ctags = gitweb_check_feature('ctags');
6121         if ($show_ctags) {
6122                 my $ctags = git_get_project_ctags($project);
6123                 if (%$ctags) {
6124                         # without ability to add tags, don't show if there are none
6125                         my $cloud = git_populate_project_tagcloud($ctags);
6126                         print "<tr id=\"metadata_ctags\">" .
6127                               "<td>content tags</td>" .
6128                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6129                               "</tr>\n";
6130                 }
6131         }
6132
6133         print "</table>\n";
6134
6135         # If XSS prevention is on, we don't include README.html.
6136         # TODO: Allow a readme in some safe format.
6137         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6138                 print "<div class=\"title\">readme</div>\n" .
6139                       "<div class=\"readme\">\n";
6140                 insert_file("$projectroot/$project/README.html");
6141                 print "\n</div>\n"; # class="readme"
6142         }
6143
6144         # we need to request one more than 16 (0..15) to check if
6145         # those 16 are all
6146         my @commitlist = $head ? parse_commits($head, 17) : ();
6147         if (@commitlist) {
6148                 git_print_header_div('shortlog');
6149                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6150                                   $#commitlist <=  15 ? undef :
6151                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6152         }
6153
6154         if (@taglist) {
6155                 git_print_header_div('tags');
6156                 git_tags_body(\@taglist, 0, 15,
6157                               $#taglist <=  15 ? undef :
6158                               $cgi->a({-href => href(action=>"tags")}, "..."));
6159         }
6160
6161         if (@headlist) {
6162                 git_print_header_div('heads');
6163                 git_heads_body(\@headlist, $head, 0, 15,
6164                                $#headlist <= 15 ? undef :
6165                                $cgi->a({-href => href(action=>"heads")}, "..."));
6166         }
6167
6168         if (%remotedata) {
6169                 git_print_header_div('remotes');
6170                 git_remotes_body(\%remotedata, 15, $head);
6171         }
6172
6173         if (@forklist) {
6174                 git_print_header_div('forks');
6175                 git_project_list_body(\@forklist, 'age', 0, 15,
6176                                       $#forklist <= 15 ? undef :
6177                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6178                                       'no_header');
6179         }
6180
6181         git_footer_html();
6182 }
6183
6184 sub git_tag {
6185         my %tag = parse_tag($hash);
6186
6187         if (! %tag) {
6188                 die_error(404, "Unknown tag object");
6189         }
6190
6191         my $head = git_get_head_hash($project);
6192         git_header_html();
6193         git_print_page_nav('','', $head,undef,$head);
6194         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6195         print "<div class=\"title_text\">\n" .
6196               "<table class=\"object_header\">\n" .
6197               "<tr>\n" .
6198               "<td>object</td>\n" .
6199               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6200                                $tag{'object'}) . "</td>\n" .
6201               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6202                                               $tag{'type'}) . "</td>\n" .
6203               "</tr>\n";
6204         if (defined($tag{'author'})) {
6205                 git_print_authorship_rows(\%tag, 'author');
6206         }
6207         print "</table>\n\n" .
6208               "</div>\n";
6209         print "<div class=\"page_body\">";
6210         my $comment = $tag{'comment'};
6211         foreach my $line (@$comment) {
6212                 chomp $line;
6213                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6214         }
6215         print "</div>\n";
6216         git_footer_html();
6217 }
6218
6219 sub git_blame_common {
6220         my $format = shift || 'porcelain';
6221         if ($format eq 'porcelain' && $cgi->param('js')) {
6222                 $format = 'incremental';
6223                 $action = 'blame_incremental'; # for page title etc
6224         }
6225
6226         # permissions
6227         gitweb_check_feature('blame')
6228                 or die_error(403, "Blame view not allowed");
6229
6230         # error checking
6231         die_error(400, "No file name given") unless $file_name;
6232         $hash_base ||= git_get_head_hash($project);
6233         die_error(404, "Couldn't find base commit") unless $hash_base;
6234         my %co = parse_commit($hash_base)
6235                 or die_error(404, "Commit not found");
6236         my $ftype = "blob";
6237         if (!defined $hash) {
6238                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6239                         or die_error(404, "Error looking up file");
6240         } else {
6241                 $ftype = git_get_type($hash);
6242                 if ($ftype !~ "blob") {
6243                         die_error(400, "Object is not a blob");
6244                 }
6245         }
6246
6247         my $fd;
6248         if ($format eq 'incremental') {
6249                 # get file contents (as base)
6250                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6251                         or die_error(500, "Open git-cat-file failed");
6252         } elsif ($format eq 'data') {
6253                 # run git-blame --incremental
6254                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6255                         $hash_base, "--", $file_name
6256                         or die_error(500, "Open git-blame --incremental failed");
6257         } else {
6258                 # run git-blame --porcelain
6259                 open $fd, "-|", git_cmd(), "blame", '-p',
6260                         $hash_base, '--', $file_name
6261                         or die_error(500, "Open git-blame --porcelain failed");
6262         }
6263
6264         # incremental blame data returns early
6265         if ($format eq 'data') {
6266                 print $cgi->header(
6267                         -type=>"text/plain", -charset => "utf-8",
6268                         -status=> "200 OK");
6269                 local $| = 1; # output autoflush
6270                 while (my $line = <$fd>) {
6271                         print to_utf8($line);
6272                 }
6273                 close $fd
6274                         or print "ERROR $!\n";
6275
6276                 print 'END';
6277                 if (defined $t0 && gitweb_check_feature('timed')) {
6278                         print ' '.
6279                               tv_interval($t0, [ gettimeofday() ]).
6280                               ' '.$number_of_git_cmds;
6281                 }
6282                 print "\n";
6283
6284                 return;
6285         }
6286
6287         # page header
6288         git_header_html();
6289         my $formats_nav =
6290                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6291                         "blob") .
6292                 " | ";
6293         if ($format eq 'incremental') {
6294                 $formats_nav .=
6295                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6296                                 "blame") . " (non-incremental)";
6297         } else {
6298                 $formats_nav .=
6299                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6300                                 "blame") . " (incremental)";
6301         }
6302         $formats_nav .=
6303                 " | " .
6304                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6305                         "history") .
6306                 " | " .
6307                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6308                         "HEAD");
6309         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6310         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6311         git_print_page_path($file_name, $ftype, $hash_base);
6312
6313         # page body
6314         if ($format eq 'incremental') {
6315                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6316                       "This page requires JavaScript to run.\n Use ".
6317                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6318                               'this page').
6319                       " instead.\n".
6320                       "</b></center></div>\n</noscript>\n";
6321
6322                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6323         }
6324
6325         print qq!<div class="page_body">\n!;
6326         print qq!<div id="progress_info">... / ...</div>\n!
6327                 if ($format eq 'incremental');
6328         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6329               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6330               qq!<thead>\n!.
6331               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6332               qq!</thead>\n!.
6333               qq!<tbody>\n!;
6334
6335         my @rev_color = qw(light dark);
6336         my $num_colors = scalar(@rev_color);
6337         my $current_color = 0;
6338
6339         if ($format eq 'incremental') {
6340                 my $color_class = $rev_color[$current_color];
6341
6342                 #contents of a file
6343                 my $linenr = 0;
6344         LINE:
6345                 while (my $line = <$fd>) {
6346                         chomp $line;
6347                         $linenr++;
6348
6349                         print qq!<tr id="l$linenr" class="$color_class">!.
6350                               qq!<td class="sha1"><a href=""> </a></td>!.
6351                               qq!<td class="linenr">!.
6352                               qq!<a class="linenr" href="">$linenr</a></td>!;
6353                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6354                         print qq!</tr>\n!;
6355                 }
6356
6357         } else { # porcelain, i.e. ordinary blame
6358                 my %metainfo = (); # saves information about commits
6359
6360                 # blame data
6361         LINE:
6362                 while (my $line = <$fd>) {
6363                         chomp $line;
6364                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6365                         # no <lines in group> for subsequent lines in group of lines
6366                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6367                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6368                         if (!exists $metainfo{$full_rev}) {
6369                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6370                         }
6371                         my $meta = $metainfo{$full_rev};
6372                         my $data;
6373                         while ($data = <$fd>) {
6374                                 chomp $data;
6375                                 last if ($data =~ s/^\t//); # contents of line
6376                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6377                                         $meta->{$1} = $2 unless exists $meta->{$1};
6378                                 }
6379                                 if ($data =~ /^previous /) {
6380                                         $meta->{'nprevious'}++;
6381                                 }
6382                         }
6383                         my $short_rev = substr($full_rev, 0, 8);
6384                         my $author = $meta->{'author'};
6385                         my %date =
6386                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6387                         my $date = $date{'iso-tz'};
6388                         if ($group_size) {
6389                                 $current_color = ($current_color + 1) % $num_colors;
6390                         }
6391                         my $tr_class = $rev_color[$current_color];
6392                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6393                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6394                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6395                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6396                         if ($group_size) {
6397                                 print "<td class=\"sha1\"";
6398                                 print " title=\"". esc_html($author) . ", $date\"";
6399                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6400                                 print ">";
6401                                 print $cgi->a({-href => href(action=>"commit",
6402                                                              hash=>$full_rev,
6403                                                              file_name=>$file_name)},
6404                                               esc_html($short_rev));
6405                                 if ($group_size >= 2) {
6406                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6407                                         if (@author_initials) {
6408                                                 print "<br />" .
6409                                                       esc_html(join('', @author_initials));
6410                                                 #           or join('.', ...)
6411                                         }
6412                                 }
6413                                 print "</td>\n";
6414                         }
6415                         # 'previous' <sha1 of parent commit> <filename at commit>
6416                         if (exists $meta->{'previous'} &&
6417                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6418                                 $meta->{'parent'} = $1;
6419                                 $meta->{'file_parent'} = unquote($2);
6420                         }
6421                         my $linenr_commit =
6422                                 exists($meta->{'parent'}) ?
6423                                 $meta->{'parent'} : $full_rev;
6424                         my $linenr_filename =
6425                                 exists($meta->{'file_parent'}) ?
6426                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6427                         my $blamed = href(action => 'blame',
6428                                           file_name => $linenr_filename,
6429                                           hash_base => $linenr_commit);
6430                         print "<td class=\"linenr\">";
6431                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6432                                         -class => "linenr" },
6433                                       esc_html($lineno));
6434                         print "</td>";
6435                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6436                         print "</tr>\n";
6437                 } # end while
6438
6439         }
6440
6441         # footer
6442         print "</tbody>\n".
6443               "</table>\n"; # class="blame"
6444         print "</div>\n";   # class="blame_body"
6445         close $fd
6446                 or print "Reading blob failed\n";
6447
6448         git_footer_html();
6449 }
6450
6451 sub git_blame {
6452         git_blame_common();
6453 }
6454
6455 sub git_blame_incremental {
6456         git_blame_common('incremental');
6457 }
6458
6459 sub git_blame_data {
6460         git_blame_common('data');
6461 }
6462
6463 sub git_tags {
6464         my $head = git_get_head_hash($project);
6465         git_header_html();
6466         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6467         git_print_header_div('summary', $project);
6468
6469         my @tagslist = git_get_tags_list();
6470         if (@tagslist) {
6471                 git_tags_body(\@tagslist);
6472         }
6473         git_footer_html();
6474 }
6475
6476 sub git_heads {
6477         my $head = git_get_head_hash($project);
6478         git_header_html();
6479         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6480         git_print_header_div('summary', $project);
6481
6482         my @headslist = git_get_heads_list();
6483         if (@headslist) {
6484                 git_heads_body(\@headslist, $head);
6485         }
6486         git_footer_html();
6487 }
6488
6489 # used both for single remote view and for list of all the remotes
6490 sub git_remotes {
6491         gitweb_check_feature('remote_heads')
6492                 or die_error(403, "Remote heads view is disabled");
6493
6494         my $head = git_get_head_hash($project);
6495         my $remote = $input_params{'hash'};
6496
6497         my $remotedata = git_get_remotes_list($remote);
6498         die_error(500, "Unable to get remote information") unless defined $remotedata;
6499
6500         unless (%$remotedata) {
6501                 die_error(404, defined $remote ?
6502                         "Remote $remote not found" :
6503                         "No remotes found");
6504         }
6505
6506         git_header_html(undef, undef, -action_extra => $remote);
6507         git_print_page_nav('', '',  $head, undef, $head,
6508                 format_ref_views($remote ? '' : 'remotes'));
6509
6510         fill_remote_heads($remotedata);
6511         if (defined $remote) {
6512                 git_print_header_div('remotes', "$remote remote for $project");
6513                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6514         } else {
6515                 git_print_header_div('summary', "$project remotes");
6516                 git_remotes_body($remotedata, undef, $head);
6517         }
6518
6519         git_footer_html();
6520 }
6521
6522 sub git_blob_plain {
6523         my $type = shift;
6524         my $expires;
6525
6526         if (!defined $hash) {
6527                 if (defined $file_name) {
6528                         my $base = $hash_base || git_get_head_hash($project);
6529                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6530                                 or die_error(404, "Cannot find file");
6531                 } else {
6532                         die_error(400, "No file name defined");
6533                 }
6534         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6535                 # blobs defined by non-textual hash id's can be cached
6536                 $expires = "+1d";
6537         }
6538
6539         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6540                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6541
6542         # content-type (can include charset)
6543         $type = blob_contenttype($fd, $file_name, $type);
6544
6545         # "save as" filename, even when no $file_name is given
6546         my $save_as = "$hash";
6547         if (defined $file_name) {
6548                 $save_as = $file_name;
6549         } elsif ($type =~ m/^text\//) {
6550                 $save_as .= '.txt';
6551         }
6552
6553         # With XSS prevention on, blobs of all types except a few known safe
6554         # ones are served with "Content-Disposition: attachment" to make sure
6555         # they don't run in our security domain.  For certain image types,
6556         # blob view writes an <img> tag referring to blob_plain view, and we
6557         # want to be sure not to break that by serving the image as an
6558         # attachment (though Firefox 3 doesn't seem to care).
6559         my $sandbox = $prevent_xss &&
6560                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6561
6562         # serve text/* as text/plain
6563         if ($prevent_xss &&
6564             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6565              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6566                 my $rest = $1;
6567                 $rest = defined $rest ? $rest : '';
6568                 $type = "text/plain$rest";
6569         }
6570
6571         print $cgi->header(
6572                 -type => $type,
6573                 -expires => $expires,
6574                 -content_disposition =>
6575                         ($sandbox ? 'attachment' : 'inline')
6576                         . '; filename="' . $save_as . '"');
6577         local $/ = undef;
6578         binmode STDOUT, ':raw';
6579         print <$fd>;
6580         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6581         close $fd;
6582 }
6583
6584 sub git_blob {
6585         my $expires;
6586
6587         if (!defined $hash) {
6588                 if (defined $file_name) {
6589                         my $base = $hash_base || git_get_head_hash($project);
6590                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6591                                 or die_error(404, "Cannot find file");
6592                 } else {
6593                         die_error(400, "No file name defined");
6594                 }
6595         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6596                 # blobs defined by non-textual hash id's can be cached
6597                 $expires = "+1d";
6598         }
6599
6600         my $have_blame = gitweb_check_feature('blame');
6601         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6602                 or die_error(500, "Couldn't cat $file_name, $hash");
6603         my $mimetype = blob_mimetype($fd, $file_name);
6604         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6605         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6606                 close $fd;
6607                 return git_blob_plain($mimetype);
6608         }
6609         # we can have blame only for text/* mimetype
6610         $have_blame &&= ($mimetype =~ m!^text/!);
6611
6612         my $highlight_js = gitweb_check_feature('syntaxhighlighter_js');
6613         if ($highlight_js) {
6614                 push @stylesheets, $highlight_js->{url} . '/styles/shCore'
6615                         . $highlight_js->{style} . '.css';
6616                 push @stylesheets, $highlight_js->{url} . '/styles/shTheme'
6617                         . $highlight_js->{theme} . '.css';
6618         }
6619
6620         my $highlight = gitweb_check_feature('highlight');
6621         if ($highlight_js && $highlight) {
6622                 die_error(500, 'The highlight and syntaxhighlighter_js are'
6623                         . 'mutually exclusive');
6624         }
6625         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6626         $fd = run_highlighter($fd, $highlight, $syntax)
6627                 if $syntax;
6628
6629         git_header_html(undef, $expires);
6630         my $formats_nav = '';
6631         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6632                 if (defined $file_name) {
6633                         if ($have_blame) {
6634                                 $formats_nav .=
6635                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6636                                                 "blame") .
6637                                         " | ";
6638                         }
6639                         $formats_nav .=
6640                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6641                                         "history") .
6642                                 " | " .
6643                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6644                                         "raw") .
6645                                 " | " .
6646                                 $cgi->a({-href => href(action=>"blob",
6647                                                        hash_base=>"HEAD", file_name=>$file_name)},
6648                                         "HEAD");
6649                 } else {
6650                         $formats_nav .=
6651                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6652                                         "raw");
6653                 }
6654                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6655                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6656         } else {
6657                 print "<div class=\"page_nav\">\n" .
6658                       "<br/><br/></div>\n" .
6659                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6660         }
6661         git_print_page_path($file_name, "blob", $hash_base);
6662         print "<div class=\"page_body\">\n";
6663         if ($mimetype =~ m!^image/!) {
6664                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6665                 if ($file_name) {
6666                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6667                 }
6668                 print qq! src="! .
6669                       href(action=>"blob_plain", hash=>$hash,
6670                            hash_base=>$hash_base, file_name=>$file_name) .
6671                       qq!" />\n!;
6672         } elsif ($highlight_js) {
6673                 my $ext = $file_name;
6674                 $ext =~ s/.*\.//;
6675                 print qq!<pre class="brush:!.$ext.qq!">!;
6676                 while (my $line = <$fd>) {
6677                         $line =~ s!&!\&#38;!g;
6678                         $line =~ s!<!\&#60;!g;
6679                         print $line;
6680                 }
6681                 print qq!</pre>!;
6682                 foreach my $name ('Core', 'Autoloader') {
6683                         print qq!<script src="!.$highlight_js->{url}
6684                                 .qq!/scripts/sh!.$name
6685                                 .qq!.js" type="text/javascript"></script>!;
6686                 }
6687                 print qq!<script type="text/javascript">!;
6688                 print qq!SyntaxHighlighter.defaults["pad-line-numbers"] = 3;!;
6689                 print qq!SyntaxHighlighter.defaults["toolbar"] = false;!;
6690                 # for XHTML compliance
6691                 print qq!SyntaxHighlighter.config["space"] = '&#160;';!;
6692                 print qq!SyntaxHighlighter.autoloader(!;
6693                 my $brush_prefix = $highlight_js->{url} . '/scripts/shBrush';
6694                 foreach my $language ('applescript AppleScript',
6695                                 'actionscript3 as3 AS3',
6696                                 'bash shell Bash',
6697                                 'clj Clojure',
6698                                 'coldfusion cf ColdFusion',
6699                                 'cpp c Cpp',
6700                                 'c# c-sharp csharp CSharp',
6701                                 'css Css',
6702                                 'delphi pascal Delphi',
6703                                 'diff patch pas Diff',
6704                                 'erl erlang Erlang',
6705                                 'groovy Groovy',
6706                                 'java Java',
6707                                 'jfx javafx JavaFX',
6708                                 'js jscript javascript JScript',
6709                                 'perl pl Perl',
6710                                 'php Php',
6711                                 'text plain Plain',
6712                                 'py python Python',
6713                                 'ruby rails ror rb Ruby',
6714                                 'scala Scala',
6715                                 'scm Scheme',
6716                                 'sql Sql',
6717                                 'vb vbnet Vb',
6718                                 'xml xhtml xslt html Xml') {
6719                         my $lang = $language;
6720                         $lang =~ s! (\S+)$! $brush_prefix$1!;
6721                         print "'".$lang.qq!.js',!;
6722                 }
6723                 print qq!''); SyntaxHighlighter.all();!
6724                         .qq!function scrollTo(number) {!
6725                         .qq!  var elements = document.getElementsByClassName(number);!
6726                         .qq!  if (elements.length == 0) setTimeout('scrollTo("' + number + '");', 50);!
6727                         .qq!  else {!
6728                         .qq!    window.scroll(0, elements[0].offsetTop);!
6729                         .qq!    window.scrollTo(0, elements[0].offsetTop);!
6730                         .qq!    elements[0].style.color = '#ff0000';!
6731                         .qq!  }!
6732                         .qq!}!
6733                         .qq!var lineRegex = /#l(\\d+)\$/;!
6734                         .qq!var lineNumber = lineRegex.exec(document.URL);!
6735                         .qq!if (lineNumber)!
6736                         .qq!  scrollTo('number' + lineNumber[1]);!
6737                         .qq!</script>!;
6738         } else {
6739                 my $nr;
6740                 while (my $line = <$fd>) {
6741                         chomp $line;
6742                         $nr++;
6743                         $line = untabify($line);
6744                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6745                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6746                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6747                 }
6748         }
6749         close $fd
6750                 or print "Reading blob failed.\n";
6751         print "</div>";
6752         git_footer_html();
6753 }
6754
6755 sub git_tree {
6756         if (!defined $hash_base) {
6757                 $hash_base = "HEAD";
6758         }
6759         if (!defined $hash) {
6760                 if (defined $file_name) {
6761                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6762                 } else {
6763                         $hash = $hash_base;
6764                 }
6765         }
6766         die_error(404, "No such tree") unless defined($hash);
6767
6768         my $show_sizes = gitweb_check_feature('show-sizes');
6769         my $have_blame = gitweb_check_feature('blame');
6770
6771         my @entries = ();
6772         {
6773                 local $/ = "\0";
6774                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6775                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6776                         or die_error(500, "Open git-ls-tree failed");
6777                 @entries = map { chomp; $_ } <$fd>;
6778                 close $fd
6779                         or die_error(404, "Reading tree failed");
6780         }
6781
6782         my $refs = git_get_references();
6783         my $ref = format_ref_marker($refs, $hash_base);
6784         git_header_html();
6785         my $basedir = '';
6786         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6787                 my @views_nav = ();
6788                 if (defined $file_name) {
6789                         push @views_nav,
6790                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6791                                         "history"),
6792                                 $cgi->a({-href => href(action=>"tree",
6793                                                        hash_base=>"HEAD", file_name=>$file_name)},
6794                                         "HEAD"),
6795                 }
6796                 my $snapshot_links = format_snapshot_links($hash);
6797                 if (defined $snapshot_links) {
6798                         # FIXME: Should be available when we have no hash base as well.
6799                         push @views_nav, $snapshot_links;
6800                 }
6801                 git_print_page_nav('tree','', $hash_base, undef, undef,
6802                                    join(' | ', @views_nav));
6803                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6804         } else {
6805                 undef $hash_base;
6806                 print "<div class=\"page_nav\">\n";
6807                 print "<br/><br/></div>\n";
6808                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6809         }
6810         if (defined $file_name) {
6811                 $basedir = $file_name;
6812                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6813                         $basedir .= '/';
6814                 }
6815                 git_print_page_path($file_name, 'tree', $hash_base);
6816         }
6817         print "<div class=\"page_body\">\n";
6818         print "<table class=\"tree\">\n";
6819         my $alternate = 1;
6820         # '..' (top directory) link if possible
6821         if (defined $hash_base &&
6822             defined $file_name && $file_name =~ m![^/]+$!) {
6823                 if ($alternate) {
6824                         print "<tr class=\"dark\">\n";
6825                 } else {
6826                         print "<tr class=\"light\">\n";
6827                 }
6828                 $alternate ^= 1;
6829
6830                 my $up = $file_name;
6831                 $up =~ s!/?[^/]+$!!;
6832                 undef $up unless $up;
6833                 # based on git_print_tree_entry
6834                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6835                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6836                 print '<td class="list">';
6837                 print $cgi->a({-href => href(action=>"tree",
6838                                              hash_base=>$hash_base,
6839                                              file_name=>$up)},
6840                               "..");
6841                 print "</td>\n";
6842                 print "<td class=\"link\"></td>\n";
6843
6844                 print "</tr>\n";
6845         }
6846         foreach my $line (@entries) {
6847                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6848
6849                 if ($alternate) {
6850                         print "<tr class=\"dark\">\n";
6851                 } else {
6852                         print "<tr class=\"light\">\n";
6853                 }
6854                 $alternate ^= 1;
6855
6856                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6857
6858                 print "</tr>\n";
6859         }
6860         print "</table>\n" .
6861               "</div>";
6862         git_footer_html();
6863 }
6864
6865 sub snapshot_name {
6866         my ($project, $hash) = @_;
6867
6868         # path/to/project.git  -> project
6869         # path/to/project/.git -> project
6870         my $name = to_utf8($project);
6871         $name =~ s,([^/])/*\.git$,$1,;
6872         $name = basename($name);
6873         # sanitize name
6874         $name =~ s/[[:cntrl:]]/?/g;
6875
6876         my $ver = $hash;
6877         if ($hash =~ /^[0-9a-fA-F]+$/) {
6878                 # shorten SHA-1 hash
6879                 my $full_hash = git_get_full_hash($project, $hash);
6880                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6881                         $ver = git_get_short_hash($project, $hash);
6882                 }
6883         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6884                 # tags don't need shortened SHA-1 hash
6885                 $ver = $1;
6886         } else {
6887                 # branches and other need shortened SHA-1 hash
6888                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6889                         $ver = $1;
6890                 }
6891                 $ver .= '-' . git_get_short_hash($project, $hash);
6892         }
6893         # in case of hierarchical branch names
6894         $ver =~ s!/!.!g;
6895
6896         # name = project-version_string
6897         $name = "$name-$ver";
6898
6899         return wantarray ? ($name, $name) : $name;
6900 }
6901
6902 sub git_snapshot {
6903         my $format = $input_params{'snapshot_format'};
6904         if (!@snapshot_fmts) {
6905                 die_error(403, "Snapshots not allowed");
6906         }
6907         # default to first supported snapshot format
6908         $format ||= $snapshot_fmts[0];
6909         if ($format !~ m/^[a-z0-9]+$/) {
6910                 die_error(400, "Invalid snapshot format parameter");
6911         } elsif (!exists($known_snapshot_formats{$format})) {
6912                 die_error(400, "Unknown snapshot format");
6913         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6914                 die_error(403, "Snapshot format not allowed");
6915         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6916                 die_error(403, "Unsupported snapshot format");
6917         }
6918
6919         my $type = git_get_type("$hash^{}");
6920         if (!$type) {
6921                 die_error(404, 'Object does not exist');
6922         }  elsif ($type eq 'blob') {
6923                 die_error(400, 'Object is not a tree-ish');
6924         }
6925
6926         my ($name, $prefix) = snapshot_name($project, $hash);
6927         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6928         my $cmd = quote_command(
6929                 git_cmd(), 'archive',
6930                 "--format=$known_snapshot_formats{$format}{'format'}",
6931                 "--prefix=$prefix/", $hash);
6932         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6933                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6934         }
6935
6936         $filename =~ s/(["\\])/\\$1/g;
6937         print $cgi->header(
6938                 -type => $known_snapshot_formats{$format}{'type'},
6939                 -content_disposition => 'inline; filename="' . $filename . '"',
6940                 -status => '200 OK');
6941
6942         open my $fd, "-|", $cmd
6943                 or die_error(500, "Execute git-archive failed");
6944         binmode STDOUT, ':raw';
6945         print <$fd>;
6946         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6947         close $fd;
6948 }
6949
6950 sub git_log_generic {
6951         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6952
6953         my $head = git_get_head_hash($project);
6954         if (!defined $base) {
6955                 $base = $head;
6956         }
6957         if (!defined $page) {
6958                 $page = 0;
6959         }
6960         my $refs = git_get_references();
6961
6962         my $commit_hash = $base;
6963         if (defined $parent) {
6964                 $commit_hash = "$parent..$base";
6965         }
6966         my @commitlist =
6967                 parse_commits($commit_hash, 101, (100 * $page),
6968                               defined $file_name ? ($file_name, "--full-history") : ());
6969
6970         my $ftype;
6971         if (!defined $file_hash && defined $file_name) {
6972                 # some commits could have deleted file in question,
6973                 # and not have it in tree, but one of them has to have it
6974                 for (my $i = 0; $i < @commitlist; $i++) {
6975                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6976                         last if defined $file_hash;
6977                 }
6978         }
6979         if (defined $file_hash) {
6980                 $ftype = git_get_type($file_hash);
6981         }
6982         if (defined $file_name && !defined $ftype) {
6983                 die_error(500, "Unknown type of object");
6984         }
6985         my %co;
6986         if (defined $file_name) {
6987                 %co = parse_commit($base)
6988                         or die_error(404, "Unknown commit object");
6989         }
6990
6991
6992         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6993         my $next_link = '';
6994         if ($#commitlist >= 100) {
6995                 $next_link =
6996                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6997                                  -accesskey => "n", -title => "Alt-n"}, "next");
6998         }
6999         my $patch_max = gitweb_get_feature('patches');
7000         if ($patch_max && !defined $file_name) {
7001                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7002                         $paging_nav .= " &sdot; " .
7003                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7004                                         "patches");
7005                 }
7006         }
7007
7008         git_header_html();
7009         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7010         if (defined $file_name) {
7011                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7012         } else {
7013                 git_print_header_div('summary', $project)
7014         }
7015         git_print_page_path($file_name, $ftype, $hash_base)
7016                 if (defined $file_name);
7017
7018         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7019                      $file_name, $file_hash, $ftype);
7020
7021         git_footer_html();
7022 }
7023
7024 sub git_log {
7025         git_log_generic('log', \&git_log_body,
7026                         $hash, $hash_parent);
7027 }
7028
7029 sub git_commit {
7030         $hash ||= $hash_base || "HEAD";
7031         my %co = parse_commit($hash)
7032             or die_error(404, "Unknown commit object");
7033
7034         my $parent  = $co{'parent'};
7035         my $parents = $co{'parents'}; # listref
7036
7037         # we need to prepare $formats_nav before any parameter munging
7038         my $formats_nav;
7039         if (!defined $parent) {
7040                 # --root commitdiff
7041                 $formats_nav .= '(initial)';
7042         } elsif (@$parents == 1) {
7043                 # single parent commit
7044                 $formats_nav .=
7045                         '(parent: ' .
7046                         $cgi->a({-href => href(action=>"commit",
7047                                                hash=>$parent)},
7048                                 esc_html(substr($parent, 0, 7))) .
7049                         ')';
7050         } else {
7051                 # merge commit
7052                 $formats_nav .=
7053                         '(merge: ' .
7054                         join(' ', map {
7055                                 $cgi->a({-href => href(action=>"commit",
7056                                                        hash=>$_)},
7057                                         esc_html(substr($_, 0, 7)));
7058                         } @$parents ) .
7059                         ')';
7060         }
7061         if (gitweb_check_feature('patches') && @$parents <= 1) {
7062                 $formats_nav .= " | " .
7063                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7064                                 "patch");
7065         }
7066
7067         if (!defined $parent) {
7068                 $parent = "--root";
7069         }
7070         my @difftree;
7071         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7072                 @diff_opts,
7073                 (@$parents <= 1 ? $parent : '-c'),
7074                 $hash, "--"
7075                 or die_error(500, "Open git-diff-tree failed");
7076         @difftree = map { chomp; $_ } <$fd>;
7077         close $fd or die_error(404, "Reading git-diff-tree failed");
7078
7079         # non-textual hash id's can be cached
7080         my $expires;
7081         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7082                 $expires = "+1d";
7083         }
7084         my $refs = git_get_references();
7085         my $ref = format_ref_marker($refs, $co{'id'});
7086
7087         git_header_html(undef, $expires);
7088         git_print_page_nav('commit', '',
7089                            $hash, $co{'tree'}, $hash,
7090                            $formats_nav);
7091
7092         if (defined $co{'parent'}) {
7093                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7094         } else {
7095                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7096         }
7097         print "<div class=\"title_text\">\n" .
7098               "<table class=\"object_header\">\n";
7099         git_print_authorship_rows(\%co);
7100         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7101         print "<tr>" .
7102               "<td>tree</td>" .
7103               "<td class=\"sha1\">" .
7104               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7105                        class => "list"}, $co{'tree'}) .
7106               "</td>" .
7107               "<td class=\"link\">" .
7108               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7109                       "tree");
7110         my $snapshot_links = format_snapshot_links($hash);
7111         if (defined $snapshot_links) {
7112                 print " | " . $snapshot_links;
7113         }
7114         print "</td>" .
7115               "</tr>\n";
7116
7117         foreach my $par (@$parents) {
7118                 print "<tr>" .
7119                       "<td>parent</td>" .
7120                       "<td class=\"sha1\">" .
7121                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7122                                class => "list"}, $par) .
7123                       "</td>" .
7124                       "<td class=\"link\">" .
7125                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7126                       " | " .
7127                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7128                       "</td>" .
7129                       "</tr>\n";
7130         }
7131         print "</table>".
7132               "</div>\n";
7133
7134         print "<div class=\"page_body\">\n";
7135         git_print_log($co{'comment'});
7136         print "</div>\n";
7137
7138         git_difftree_body(\@difftree, $hash, @$parents);
7139
7140         git_footer_html();
7141 }
7142
7143 sub git_object {
7144         # object is defined by:
7145         # - hash or hash_base alone
7146         # - hash_base and file_name
7147         my $type;
7148
7149         # - hash or hash_base alone
7150         if ($hash || ($hash_base && !defined $file_name)) {
7151                 my $object_id = $hash || $hash_base;
7152
7153                 open my $fd, "-|", quote_command(
7154                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7155                         or die_error(404, "Object does not exist");
7156                 $type = <$fd>;
7157                 chomp $type;
7158                 close $fd
7159                         or die_error(404, "Object does not exist");
7160
7161         # - hash_base and file_name
7162         } elsif ($hash_base && defined $file_name) {
7163                 $file_name =~ s,/+$,,;
7164
7165                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7166                         or die_error(404, "Base object does not exist");
7167
7168                 # here errors should not hapen
7169                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7170                         or die_error(500, "Open git-ls-tree failed");
7171                 my $line = <$fd>;
7172                 close $fd;
7173
7174                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7175                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7176                         die_error(404, "File or directory for given base does not exist");
7177                 }
7178                 $type = $2;
7179                 $hash = $3;
7180         } else {
7181                 die_error(400, "Not enough information to find object");
7182         }
7183
7184         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7185                                           hash=>$hash, hash_base=>$hash_base,
7186                                           file_name=>$file_name),
7187                              -status => '302 Found');
7188 }
7189
7190 sub git_blobdiff {
7191         my $format = shift || 'html';
7192         my $diff_style = $input_params{'diff_style'} || 'inline';
7193
7194         my $fd;
7195         my @difftree;
7196         my %diffinfo;
7197         my $expires;
7198
7199         # preparing $fd and %diffinfo for git_patchset_body
7200         # new style URI
7201         if (defined $hash_base && defined $hash_parent_base) {
7202                 if (defined $file_name) {
7203                         # read raw output
7204                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7205                                 $hash_parent_base, $hash_base,
7206                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7207                                 or die_error(500, "Open git-diff-tree failed");
7208                         @difftree = map { chomp; $_ } <$fd>;
7209                         close $fd
7210                                 or die_error(404, "Reading git-diff-tree failed");
7211                         @difftree
7212                                 or die_error(404, "Blob diff not found");
7213
7214                 } elsif (defined $hash &&
7215                          $hash =~ /[0-9a-fA-F]{40}/) {
7216                         # try to find filename from $hash
7217
7218                         # read filtered raw output
7219                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7220                                 $hash_parent_base, $hash_base, "--"
7221                                 or die_error(500, "Open git-diff-tree failed");
7222                         @difftree =
7223                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7224                                 # $hash == to_id
7225                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7226                                 map { chomp; $_ } <$fd>;
7227                         close $fd
7228                                 or die_error(404, "Reading git-diff-tree failed");
7229                         @difftree
7230                                 or die_error(404, "Blob diff not found");
7231
7232                 } else {
7233                         die_error(400, "Missing one of the blob diff parameters");
7234                 }
7235
7236                 if (@difftree > 1) {
7237                         die_error(400, "Ambiguous blob diff specification");
7238                 }
7239
7240                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7241                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7242                 $file_name   ||= $diffinfo{'to_file'};
7243
7244                 $hash_parent ||= $diffinfo{'from_id'};
7245                 $hash        ||= $diffinfo{'to_id'};
7246
7247                 # non-textual hash id's can be cached
7248                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7249                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7250                         $expires = '+1d';
7251                 }
7252
7253                 # open patch output
7254                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7255                         '-p', ($format eq 'html' ? "--full-index" : ()),
7256                         $hash_parent_base, $hash_base,
7257                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7258                         or die_error(500, "Open git-diff-tree failed");
7259         }
7260
7261         # old/legacy style URI -- not generated anymore since 1.4.3.
7262         if (!%diffinfo) {
7263                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7264         }
7265
7266         # header
7267         if ($format eq 'html') {
7268                 my $formats_nav =
7269                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7270                                 "raw");
7271                 $formats_nav .= diff_style_nav($diff_style);
7272                 git_header_html(undef, $expires);
7273                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7274                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7275                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7276                 } else {
7277                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7278                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7279                 }
7280                 if (defined $file_name) {
7281                         git_print_page_path($file_name, "blob", $hash_base);
7282                 } else {
7283                         print "<div class=\"page_path\"></div>\n";
7284                 }
7285
7286         } elsif ($format eq 'plain') {
7287                 print $cgi->header(
7288                         -type => 'text/plain',
7289                         -charset => 'utf-8',
7290                         -expires => $expires,
7291                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7292
7293                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7294
7295         } else {
7296                 die_error(400, "Unknown blobdiff format");
7297         }
7298
7299         # patch
7300         if ($format eq 'html') {
7301                 print "<div class=\"page_body\">\n";
7302
7303                 git_patchset_body($fd, $diff_style,
7304                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7305                 close $fd;
7306
7307                 print "</div>\n"; # class="page_body"
7308                 git_footer_html();
7309
7310         } else {
7311                 while (my $line = <$fd>) {
7312                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7313                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7314
7315                         print $line;
7316
7317                         last if $line =~ m!^\+\+\+!;
7318                 }
7319                 local $/ = undef;
7320                 print <$fd>;
7321                 close $fd;
7322         }
7323 }
7324
7325 sub git_blobdiff_plain {
7326         git_blobdiff('plain');
7327 }
7328
7329 # assumes that it is added as later part of already existing navigation,
7330 # so it returns "| foo | bar" rather than just "foo | bar"
7331 sub diff_style_nav {
7332         my ($diff_style, $is_combined) = @_;
7333         $diff_style ||= 'inline';
7334
7335         return "" if ($is_combined);
7336
7337         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7338         my %styles = @styles;
7339         @styles =
7340                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7341
7342         return join '',
7343                 map { " | ".$_ }
7344                 map {
7345                         $_ eq $diff_style ? $styles{$_} :
7346                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7347                 } @styles;
7348 }
7349
7350 sub git_commitdiff {
7351         my %params = @_;
7352         my $format = $params{-format} || 'html';
7353         my $diff_style = $input_params{'diff_style'} || 'inline';
7354
7355         my ($patch_max) = gitweb_get_feature('patches');
7356         if ($format eq 'patch') {
7357                 die_error(403, "Patch view not allowed") unless $patch_max;
7358         }
7359
7360         $hash ||= $hash_base || "HEAD";
7361         my %co = parse_commit($hash)
7362             or die_error(404, "Unknown commit object");
7363
7364         # choose format for commitdiff for merge
7365         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7366                 $hash_parent = '--cc';
7367         }
7368         # we need to prepare $formats_nav before almost any parameter munging
7369         my $formats_nav;
7370         if ($format eq 'html') {
7371                 $formats_nav =
7372                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7373                                 "raw");
7374                 if ($patch_max && @{$co{'parents'}} <= 1) {
7375                         $formats_nav .= " | " .
7376                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7377                                         "patch");
7378                 }
7379                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7380
7381                 if (defined $hash_parent &&
7382                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7383                         # commitdiff with two commits given
7384                         my $hash_parent_short = $hash_parent;
7385                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7386                                 $hash_parent_short = substr($hash_parent, 0, 7);
7387                         }
7388                         $formats_nav .=
7389                                 ' (from';
7390                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7391                                 if ($co{'parents'}[$i] eq $hash_parent) {
7392                                         $formats_nav .= ' parent ' . ($i+1);
7393                                         last;
7394                                 }
7395                         }
7396                         $formats_nav .= ': ' .
7397                                 $cgi->a({-href => href(-replay=>1,
7398                                                        hash=>$hash_parent, hash_base=>undef)},
7399                                         esc_html($hash_parent_short)) .
7400                                 ')';
7401                 } elsif (!$co{'parent'}) {
7402                         # --root commitdiff
7403                         $formats_nav .= ' (initial)';
7404                 } elsif (scalar @{$co{'parents'}} == 1) {
7405                         # single parent commit
7406                         $formats_nav .=
7407                                 ' (parent: ' .
7408                                 $cgi->a({-href => href(-replay=>1,
7409                                                        hash=>$co{'parent'}, hash_base=>undef)},
7410                                         esc_html(substr($co{'parent'}, 0, 7))) .
7411                                 ')';
7412                 } else {
7413                         # merge commit
7414                         if ($hash_parent eq '--cc') {
7415                                 $formats_nav .= ' | ' .
7416                                         $cgi->a({-href => href(-replay=>1,
7417                                                                hash=>$hash, hash_parent=>'-c')},
7418                                                 'combined');
7419                         } else { # $hash_parent eq '-c'
7420                                 $formats_nav .= ' | ' .
7421                                         $cgi->a({-href => href(-replay=>1,
7422                                                                hash=>$hash, hash_parent=>'--cc')},
7423                                                 'compact');
7424                         }
7425                         $formats_nav .=
7426                                 ' (merge: ' .
7427                                 join(' ', map {
7428                                         $cgi->a({-href => href(-replay=>1,
7429                                                                hash=>$_, hash_base=>undef)},
7430                                                 esc_html(substr($_, 0, 7)));
7431                                 } @{$co{'parents'}} ) .
7432                                 ')';
7433                 }
7434         }
7435
7436         my $hash_parent_param = $hash_parent;
7437         if (!defined $hash_parent_param) {
7438                 # --cc for multiple parents, --root for parentless
7439                 $hash_parent_param =
7440                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7441         }
7442
7443         # read commitdiff
7444         my $fd;
7445         my @difftree;
7446         if ($format eq 'html') {
7447                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7448                         "--no-commit-id", "--patch-with-raw", "--full-index",
7449                         $hash_parent_param, $hash, "--"
7450                         or die_error(500, "Open git-diff-tree failed");
7451
7452                 while (my $line = <$fd>) {
7453                         chomp $line;
7454                         # empty line ends raw part of diff-tree output
7455                         last unless $line;
7456                         push @difftree, scalar parse_difftree_raw_line($line);
7457                 }
7458
7459         } elsif ($format eq 'plain') {
7460                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7461                         '-p', $hash_parent_param, $hash, "--"
7462                         or die_error(500, "Open git-diff-tree failed");
7463         } elsif ($format eq 'patch') {
7464                 # For commit ranges, we limit the output to the number of
7465                 # patches specified in the 'patches' feature.
7466                 # For single commits, we limit the output to a single patch,
7467                 # diverging from the git-format-patch default.
7468                 my @commit_spec = ();
7469                 if ($hash_parent) {
7470                         if ($patch_max > 0) {
7471                                 push @commit_spec, "-$patch_max";
7472                         }
7473                         push @commit_spec, '-n', "$hash_parent..$hash";
7474                 } else {
7475                         if ($params{-single}) {
7476                                 push @commit_spec, '-1';
7477                         } else {
7478                                 if ($patch_max > 0) {
7479                                         push @commit_spec, "-$patch_max";
7480                                 }
7481                                 push @commit_spec, "-n";
7482                         }
7483                         push @commit_spec, '--root', $hash;
7484                 }
7485                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7486                         '--encoding=utf8', '--stdout', @commit_spec
7487                         or die_error(500, "Open git-format-patch failed");
7488         } else {
7489                 die_error(400, "Unknown commitdiff format");
7490         }
7491
7492         # non-textual hash id's can be cached
7493         my $expires;
7494         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7495                 $expires = "+1d";
7496         }
7497
7498         # write commit message
7499         if ($format eq 'html') {
7500                 my $refs = git_get_references();
7501                 my $ref = format_ref_marker($refs, $co{'id'});
7502
7503                 git_header_html(undef, $expires);
7504                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7505                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7506                 print "<div class=\"title_text\">\n" .
7507                       "<table class=\"object_header\">\n";
7508                 git_print_authorship_rows(\%co);
7509                 print "</table>".
7510                       "</div>\n";
7511                 print "<div class=\"page_body\">\n";
7512                 if (@{$co{'comment'}} > 1) {
7513                         print "<div class=\"log\">\n";
7514                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7515                         print "</div>\n"; # class="log"
7516                 }
7517
7518         } elsif ($format eq 'plain') {
7519                 my $refs = git_get_references("tags");
7520                 my $tagname = git_get_rev_name_tags($hash);
7521                 my $filename = basename($project) . "-$hash.patch";
7522
7523                 print $cgi->header(
7524                         -type => 'text/plain',
7525                         -charset => 'utf-8',
7526                         -expires => $expires,
7527                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7528                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7529                 print "From: " . to_utf8($co{'author'}) . "\n";
7530                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7531                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7532
7533                 print "X-Git-Tag: $tagname\n" if $tagname;
7534                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7535
7536                 foreach my $line (@{$co{'comment'}}) {
7537                         print to_utf8($line) . "\n";
7538                 }
7539                 print "---\n\n";
7540         } elsif ($format eq 'patch') {
7541                 my $filename = basename($project) . "-$hash.patch";
7542
7543                 print $cgi->header(
7544                         -type => 'text/plain',
7545                         -charset => 'utf-8',
7546                         -expires => $expires,
7547                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7548         }
7549
7550         # write patch
7551         if ($format eq 'html') {
7552                 my $use_parents = !defined $hash_parent ||
7553                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7554                 git_difftree_body(\@difftree, $hash,
7555                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7556                 print "<br/>\n";
7557
7558                 git_patchset_body($fd, $diff_style,
7559                                   \@difftree, $hash,
7560                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7561                 close $fd;
7562                 print "</div>\n"; # class="page_body"
7563                 git_footer_html();
7564
7565         } elsif ($format eq 'plain') {
7566                 local $/ = undef;
7567                 print <$fd>;
7568                 close $fd
7569                         or print "Reading git-diff-tree failed\n";
7570         } elsif ($format eq 'patch') {
7571                 local $/ = undef;
7572                 print <$fd>;
7573                 close $fd
7574                         or print "Reading git-format-patch failed\n";
7575         }
7576 }
7577
7578 sub git_commitdiff_plain {
7579         git_commitdiff(-format => 'plain');
7580 }
7581
7582 # format-patch-style patches
7583 sub git_patch {
7584         git_commitdiff(-format => 'patch', -single => 1);
7585 }
7586
7587 sub git_patches {
7588         git_commitdiff(-format => 'patch');
7589 }
7590
7591 sub git_history {
7592         git_log_generic('history', \&git_history_body,
7593                         $hash_base, $hash_parent_base,
7594                         $file_name, $hash);
7595 }
7596
7597 sub git_search {
7598         $searchtype ||= 'commit';
7599
7600         # check if appropriate features are enabled
7601         gitweb_check_feature('search')
7602                 or die_error(403, "Search is disabled");
7603         if ($searchtype eq 'pickaxe') {
7604                 # pickaxe may take all resources of your box and run for several minutes
7605                 # with every query - so decide by yourself how public you make this feature
7606                 gitweb_check_feature('pickaxe')
7607                         or die_error(403, "Pickaxe search is disabled");
7608         }
7609         if ($searchtype eq 'grep') {
7610                 # grep search might be potentially CPU-intensive, too
7611                 gitweb_check_feature('grep')
7612                         or die_error(403, "Grep search is disabled");
7613         }
7614
7615         if (!defined $searchtext) {
7616                 die_error(400, "Text field is empty");
7617         }
7618         if (!defined $hash) {
7619                 $hash = git_get_head_hash($project);
7620         }
7621         my %co = parse_commit($hash);
7622         if (!%co) {
7623                 die_error(404, "Unknown commit object");
7624         }
7625         if (!defined $page) {
7626                 $page = 0;
7627         }
7628
7629         if ($searchtype eq 'commit' ||
7630             $searchtype eq 'author' ||
7631             $searchtype eq 'committer') {
7632                 git_search_message(%co);
7633         } elsif ($searchtype eq 'pickaxe') {
7634                 git_search_changes(%co);
7635         } elsif ($searchtype eq 'grep') {
7636                 git_search_files(%co);
7637         } else {
7638                 die_error(400, "Unknown search type");
7639         }
7640 }
7641
7642 sub git_search_help {
7643         git_header_html();
7644         git_print_page_nav('','', $hash,$hash,$hash);
7645         print <<EOT;
7646 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7647 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7648 the pattern entered is recognized as the POSIX extended
7649 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7650 insensitive).</p>
7651 <dl>
7652 <dt><b>commit</b></dt>
7653 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7654 EOT
7655         my $have_grep = gitweb_check_feature('grep');
7656         if ($have_grep) {
7657                 print <<EOT;
7658 <dt><b>grep</b></dt>
7659 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7660     a different one) are searched for the given pattern. On large trees, this search can take
7661 a while and put some strain on the server, so please use it with some consideration. Note that
7662 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7663 case-sensitive.</dd>
7664 EOT
7665         }
7666         print <<EOT;
7667 <dt><b>author</b></dt>
7668 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7669 <dt><b>committer</b></dt>
7670 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7671 EOT
7672         my $have_pickaxe = gitweb_check_feature('pickaxe');
7673         if ($have_pickaxe) {
7674                 print <<EOT;
7675 <dt><b>pickaxe</b></dt>
7676 <dd>All commits that caused the string to appear or disappear from any file (changes that
7677 added, removed or "modified" the string) will be listed. This search can take a while and
7678 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7679 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7680 EOT
7681         }
7682         print "</dl>\n";
7683         git_footer_html();
7684 }
7685
7686 sub git_shortlog {
7687         git_log_generic('shortlog', \&git_shortlog_body,
7688                         $hash, $hash_parent);
7689 }
7690
7691 ## ......................................................................
7692 ## feeds (RSS, Atom; OPML)
7693
7694 sub git_feed {
7695         my $format = shift || 'atom';
7696         my $have_blame = gitweb_check_feature('blame');
7697
7698         # Atom: http://www.atomenabled.org/developers/syndication/
7699         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7700         if ($format ne 'rss' && $format ne 'atom') {
7701                 die_error(400, "Unknown web feed format");
7702         }
7703
7704         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7705         my $head = $hash || 'HEAD';
7706         my @commitlist = parse_commits($head, 150, 0, $file_name);
7707
7708         my %latest_commit;
7709         my %latest_date;
7710         my $content_type = "application/$format+xml";
7711         if (defined $cgi->http('HTTP_ACCEPT') &&
7712                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7713                 # browser (feed reader) prefers text/xml
7714                 $content_type = 'text/xml';
7715         }
7716         if (defined($commitlist[0])) {
7717                 %latest_commit = %{$commitlist[0]};
7718                 my $latest_epoch = $latest_commit{'committer_epoch'};
7719                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7720                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7721                 if (defined $if_modified) {
7722                         my $since;
7723                         if (eval { require HTTP::Date; 1; }) {
7724                                 $since = HTTP::Date::str2time($if_modified);
7725                         } elsif (eval { require Time::ParseDate; 1; }) {
7726                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7727                         }
7728                         if (defined $since && $latest_epoch <= $since) {
7729                                 print $cgi->header(
7730                                         -type => $content_type,
7731                                         -charset => 'utf-8',
7732                                         -last_modified => $latest_date{'rfc2822'},
7733                                         -status => '304 Not Modified');
7734                                 return;
7735                         }
7736                 }
7737                 print $cgi->header(
7738                         -type => $content_type,
7739                         -charset => 'utf-8',
7740                         -last_modified => $latest_date{'rfc2822'});
7741         } else {
7742                 print $cgi->header(
7743                         -type => $content_type,
7744                         -charset => 'utf-8');
7745         }
7746
7747         # Optimization: skip generating the body if client asks only
7748         # for Last-Modified date.
7749         return if ($cgi->request_method() eq 'HEAD');
7750
7751         # header variables
7752         my $title = "$site_name - $project/$action";
7753         my $feed_type = 'log';
7754         if (defined $hash) {
7755                 $title .= " - '$hash'";
7756                 $feed_type = 'branch log';
7757                 if (defined $file_name) {
7758                         $title .= " :: $file_name";
7759                         $feed_type = 'history';
7760                 }
7761         } elsif (defined $file_name) {
7762                 $title .= " - $file_name";
7763                 $feed_type = 'history';
7764         }
7765         $title .= " $feed_type";
7766         my $descr = git_get_project_description($project);
7767         if (defined $descr) {
7768                 $descr = esc_html($descr);
7769         } else {
7770                 $descr = "$project " .
7771                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7772                          " feed";
7773         }
7774         my $owner = git_get_project_owner($project);
7775         $owner = esc_html($owner);
7776
7777         #header
7778         my $alt_url;
7779         if (defined $file_name) {
7780                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7781         } elsif (defined $hash) {
7782                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7783         } else {
7784                 $alt_url = href(-full=>1, action=>"summary");
7785         }
7786         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7787         if ($format eq 'rss') {
7788                 print <<XML;
7789 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7790 <channel>
7791 XML
7792                 print "<title>$title</title>\n" .
7793                       "<link>$alt_url</link>\n" .
7794                       "<description>$descr</description>\n" .
7795                       "<language>en</language>\n" .
7796                       # project owner is responsible for 'editorial' content
7797                       "<managingEditor>$owner</managingEditor>\n";
7798                 if (defined $logo || defined $favicon) {
7799                         # prefer the logo to the favicon, since RSS
7800                         # doesn't allow both
7801                         my $img = esc_url($logo || $favicon);
7802                         print "<image>\n" .
7803                               "<url>$img</url>\n" .
7804                               "<title>$title</title>\n" .
7805                               "<link>$alt_url</link>\n" .
7806                               "</image>\n";
7807                 }
7808                 if (%latest_date) {
7809                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7810                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7811                 }
7812                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7813         } elsif ($format eq 'atom') {
7814                 print <<XML;
7815 <feed xmlns="http://www.w3.org/2005/Atom">
7816 XML
7817                 print "<title>$title</title>\n" .
7818                       "<subtitle>$descr</subtitle>\n" .
7819                       '<link rel="alternate" type="text/html" href="' .
7820                       $alt_url . '" />' . "\n" .
7821                       '<link rel="self" type="' . $content_type . '" href="' .
7822                       $cgi->self_url() . '" />' . "\n" .
7823                       "<id>" . href(-full=>1) . "</id>\n" .
7824                       # use project owner for feed author
7825                       "<author><name>$owner</name></author>\n";
7826                 if (defined $favicon) {
7827                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7828                 }
7829                 if (defined $logo) {
7830                         # not twice as wide as tall: 72 x 27 pixels
7831                         print "<logo>" . esc_url($logo) . "</logo>\n";
7832                 }
7833                 if (! %latest_date) {
7834                         # dummy date to keep the feed valid until commits trickle in:
7835                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7836                 } else {
7837                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7838                 }
7839                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7840         }
7841
7842         # contents
7843         for (my $i = 0; $i <= $#commitlist; $i++) {
7844                 my %co = %{$commitlist[$i]};
7845                 my $commit = $co{'id'};
7846                 # we read 150, we always show 30 and the ones more recent than 48 hours
7847                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7848                         last;
7849                 }
7850                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7851
7852                 # get list of changed files
7853                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7854                         $co{'parent'} || "--root",
7855                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7856                         or next;
7857                 my @difftree = map { chomp; $_ } <$fd>;
7858                 close $fd
7859                         or next;
7860
7861                 # print element (entry, item)
7862                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7863                 if ($format eq 'rss') {
7864                         print "<item>\n" .
7865                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7866                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7867                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7868                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7869                               "<link>$co_url</link>\n" .
7870                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7871                               "<content:encoded>" .
7872                               "<![CDATA[\n";
7873                 } elsif ($format eq 'atom') {
7874                         print "<entry>\n" .
7875                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7876                               "<updated>$cd{'iso-8601'}</updated>\n" .
7877                               "<author>\n" .
7878                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7879                         if ($co{'author_email'}) {
7880                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7881                         }
7882                         print "</author>\n" .
7883                               # use committer for contributor
7884                               "<contributor>\n" .
7885                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7886                         if ($co{'committer_email'}) {
7887                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7888                         }
7889                         print "</contributor>\n" .
7890                               "<published>$cd{'iso-8601'}</published>\n" .
7891                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7892                               "<id>$co_url</id>\n" .
7893                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7894                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7895                 }
7896                 my $comment = $co{'comment'};
7897                 print "<pre>\n";
7898                 foreach my $line (@$comment) {
7899                         $line = esc_html($line);
7900                         print "$line\n";
7901                 }
7902                 print "</pre><ul>\n";
7903                 foreach my $difftree_line (@difftree) {
7904                         my %difftree = parse_difftree_raw_line($difftree_line);
7905                         next if !$difftree{'from_id'};
7906
7907                         my $file = $difftree{'file'} || $difftree{'to_file'};
7908
7909                         print "<li>" .
7910                               "[" .
7911                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7912                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7913                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7914                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7915                                       -title => "diff"}, 'D');
7916                         if ($have_blame) {
7917                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7918                                                              file_name=>$file, hash_base=>$commit),
7919                                               -title => "blame"}, 'B');
7920                         }
7921                         # if this is not a feed of a file history
7922                         if (!defined $file_name || $file_name ne $file) {
7923                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7924                                                              file_name=>$file, hash=>$commit),
7925                                               -title => "history"}, 'H');
7926                         }
7927                         $file = esc_path($file);
7928                         print "] ".
7929                               "$file</li>\n";
7930                 }
7931                 if ($format eq 'rss') {
7932                         print "</ul>]]>\n" .
7933                               "</content:encoded>\n" .
7934                               "</item>\n";
7935                 } elsif ($format eq 'atom') {
7936                         print "</ul>\n</div>\n" .
7937                               "</content>\n" .
7938                               "</entry>\n";
7939                 }
7940         }
7941
7942         # end of feed
7943         if ($format eq 'rss') {
7944                 print "</channel>\n</rss>\n";
7945         } elsif ($format eq 'atom') {
7946                 print "</feed>\n";
7947         }
7948 }
7949
7950 sub git_rss {
7951         git_feed('rss');
7952 }
7953
7954 sub git_atom {
7955         git_feed('atom');
7956 }
7957
7958 sub git_opml {
7959         my @list = git_get_projects_list();
7960         if (!@list) {
7961                 die_error(404, "No projects found");
7962         }
7963
7964         print $cgi->header(
7965                 -type => 'text/xml',
7966                 -charset => 'utf-8',
7967                 -content_disposition => 'inline; filename="opml.xml"');
7968
7969         my $title = esc_html($site_name);
7970         print <<XML;
7971 <?xml version="1.0" encoding="utf-8"?>
7972 <opml version="1.0">
7973 <head>
7974   <title>$title OPML Export</title>
7975 </head>
7976 <body>
7977 <outline text="git RSS feeds">
7978 XML
7979
7980         foreach my $pr (@list) {
7981                 my %proj = %$pr;
7982                 my $head = git_get_head_hash($proj{'path'});
7983                 if (!defined $head) {
7984                         next;
7985                 }
7986                 $git_dir = "$projectroot/$proj{'path'}";
7987                 my %co = parse_commit($head);
7988                 if (!%co) {
7989                         next;
7990                 }
7991
7992                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7993                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7994                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7995                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7996         }
7997         print <<XML;
7998 </outline>
7999 </body>
8000 </opml>
8001 XML
8002 }