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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         project_filter => "pf",
 764         # this must be last entry (for manipulation from JavaScript)
 765         javascript => "js"
 766 );
 767 our %cgi_param_mapping = @cgi_param_mapping;
 768
 769 # we will also need to know the possible actions, for validation
 770 our %actions = (
 771         "blame" => \&git_blame,
 772         "blame_incremental" => \&git_blame_incremental,
 773         "blame_data" => \&git_blame_data,
 774         "blobdiff" => \&git_blobdiff,
 775         "blobdiff_plain" => \&git_blobdiff_plain,
 776         "blob" => \&git_blob,
 777         "blob_plain" => \&git_blob_plain,
 778         "commitdiff" => \&git_commitdiff,
 779         "commitdiff_plain" => \&git_commitdiff_plain,
 780         "commit" => \&git_commit,
 781         "forks" => \&git_forks,
 782         "heads" => \&git_heads,
 783         "history" => \&git_history,
 784         "log" => \&git_log,
 785         "patch" => \&git_patch,
 786         "patches" => \&git_patches,
 787         "remotes" => \&git_remotes,
 788         "rss" => \&git_rss,
 789         "atom" => \&git_atom,
 790         "search" => \&git_search,
 791         "search_help" => \&git_search_help,
 792         "shortlog" => \&git_shortlog,
 793         "summary" => \&git_summary,
 794         "tag" => \&git_tag,
 795         "tags" => \&git_tags,
 796         "tree" => \&git_tree,
 797         "snapshot" => \&git_snapshot,
 798         "object" => \&git_object,
 799         # those below don't need $project
 800         "opml" => \&git_opml,
 801         "project_list" => \&git_project_list,
 802         "project_index" => \&git_project_index,
 803 );
 804
 805 # finally, we have the hash of allowed extra_options for the commands that
 806 # allow them
 807 our %allowed_options = (
 808         "--no-merges" => [ qw(rss atom log shortlog history) ],
 809 );
 810
 811 # fill %input_params with the CGI parameters. All values except for 'opt'
 812 # should be single values, but opt can be an array. We should probably
 813 # build an array of parameters that can be multi-valued, but since for the time
 814 # being it's only this one, we just single it out
 815 sub evaluate_query_params {
 816         our $cgi;
 817
 818         while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                 if ($symbol eq 'opt') {
 820                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 823                 }
 824         }
 825 }
 826
 827 # now read PATH_INFO and update the parameter list for missing parameters
 828 sub evaluate_path_info {
 829         return if defined $input_params{'project'};
 830         return if !$path_info;
 831         $path_info =~ s,^/+,,;
 832         return if !$path_info;
 833
 834         # find which part of PATH_INFO is project
 835         my $project = $path_info;
 836         $project =~ s,/+$,,;
 837         while ($project && !check_head_link("$projectroot/$project")) {
 838                 $project =~ s,/*[^/]*$,,;
 839         }
 840         return unless $project;
 841         $input_params{'project'} = $project;
 842
 843         # do not change any parameters if an action is given using the query string
 844         return if $input_params{'action'};
 845         $path_info =~ s,^\Q$project\E/*,,;
 846
 847         # next, check if we have an action
 848         my $action = $path_info;
 849         $action =~ s,/.*$,,;
 850         if (exists $actions{$action}) {
 851                 $path_info =~ s,^$action/*,,;
 852                 $input_params{'action'} = $action;
 853         }
 854
 855         # list of actions that want hash_base instead of hash, but can have no
 856         # pathname (f) parameter
 857         my @wants_base = (
 858                 'tree',
 859                 'history',
 860         );
 861
 862         # we want to catch, among others
 863         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864         my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867         # first, analyze the 'current' part
 868         if (defined $pathname) {
 869                 # we got "branch:filename" or "branch:dir/"
 870                 # we could use git_get_type(branch:pathname), but:
 871                 # - it needs $git_dir
 872                 # - it does a git() call
 873                 # - the convention of terminating directories with a slash
 874                 #   makes it superfluous
 875                 # - embedding the action in the PATH_INFO would make it even
 876                 #   more superfluous
 877                 $pathname =~ s,^/+,,;
 878                 if (!$pathname || substr($pathname, -1) eq "/") {
 879                         $input_params{'action'} ||= "tree";
 880                         $pathname =~ s,/$,,;
 881                 } else {
 882                         # the default action depends on whether we had parent info
 883                         # or not
 884                         if ($parentrefname) {
 885                                 $input_params{'action'} ||= "blobdiff_plain";
 886                         } else {
 887                                 $input_params{'action'} ||= "blob_plain";
 888                         }
 889                 }
 890                 $input_params{'hash_base'} ||= $refname;
 891                 $input_params{'file_name'} ||= $pathname;
 892         } elsif (defined $refname) {
 893                 # we got "branch". In this case we have to choose if we have to
 894                 # set hash or hash_base.
 895                 #
 896                 # Most of the actions without a pathname only want hash to be
 897                 # set, except for the ones specified in @wants_base that want
 898                 # hash_base instead. It should also be noted that hand-crafted
 899                 # links having 'history' as an action and no pathname or hash
 900                 # set will fail, but that happens regardless of PATH_INFO.
 901                 if (defined $parentrefname) {
 902                         # if there is parent let the default be 'shortlog' action
 903                         # (for http://git.example.com/repo.git/A..B links); if there
 904                         # is no parent, dispatch will detect type of object and set
 905                         # action appropriately if required (if action is not set)
 906                         $input_params{'action'} ||= "shortlog";
 907                 }
 908                 if ($input_params{'action'} &&
 909                     grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_base'} ||= $refname;
 911                 } else {
 912                         $input_params{'hash'} ||= $refname;
 913                 }
 914         }
 915
 916         # next, handle the 'parent' part, if present
 917         if (defined $parentrefname) {
 918                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                 # someproject/blobdiff/oldrev..newrev:/filename
 920                 if ($parentpathname) {
 921                         $parentpathname =~ s,^/+,,;
 922                         $parentpathname =~ s,/$,,;
 923                         $input_params{'file_parent'} ||= $parentpathname;
 924                 } else {
 925                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                 }
 927                 # we assume that hash_parent_base is wanted if a path was specified,
 928                 # or if the action wants hash_base instead of hash
 929                 if (defined $input_params{'file_parent'} ||
 930                         grep { $_ eq $input_params{'action'} } @wants_base) {
 931                         $input_params{'hash_parent_base'} ||= $parentrefname;
 932                 } else {
 933                         $input_params{'hash_parent'} ||= $parentrefname;
 934                 }
 935         }
 936
 937         # for the snapshot action, we allow URLs in the form
 938         # $project/snapshot/$hash.ext
 939         # where .ext determines the snapshot and gets removed from the
 940         # passed $refname to provide the $hash.
 941         #
 942         # To be able to tell that $refname includes the format extension, we
 943         # require the following two conditions to be satisfied:
 944         # - the hash input parameter MUST have been set from the $refname part
 945         #   of the URL (i.e. they must be equal)
 946         # - the snapshot format MUST NOT have been defined already (e.g. from
 947         #   CGI parameter sf)
 948         # It's also useless to try any matching unless $refname has a dot,
 949         # so we check for that too
 950         if (defined $input_params{'action'} &&
 951                 $input_params{'action'} eq 'snapshot' &&
 952                 defined $refname && index($refname, '.') != -1 &&
 953                 $refname eq $input_params{'hash'} &&
 954                 !defined $input_params{'snapshot_format'}) {
 955                 # We loop over the known snapshot formats, checking for
 956                 # extensions. Allowed extensions are both the defined suffix
 957                 # (which includes the initial dot already) and the snapshot
 958                 # format key itself, with a prepended dot
 959                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                         my $hash = $refname;
 961                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                 next;
 963                         }
 964                         my $sfx = $1;
 965                         # a valid suffix was found, so set the snapshot format
 966                         # and reset the hash parameter
 967                         $input_params{'snapshot_format'} = $fmt;
 968                         $input_params{'hash'} = $hash;
 969                         # we also set the format suffix to the one requested
 970                         # in the URL: this way a request for e.g. .tgz returns
 971                         # a .tgz instead of a .tar.gz
 972                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                         last;
 974                 }
 975         }
 976 }
 977
 978 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980      $searchtext, $search_regexp, $project_filter);
 981 sub evaluate_and_validate_params {
 982         our $action = $input_params{'action'};
 983         if (defined $action) {
 984                 if (!validate_action($action)) {
 985                         die_error(400, "Invalid action parameter");
 986                 }
 987         }
 988
 989         # parameters which are pathnames
 990         our $project = $input_params{'project'};
 991         if (defined $project) {
 992                 if (!validate_project($project)) {
 993                         undef $project;
 994                         die_error(404, "No such project");
 995                 }
 996         }
 997
 998         our $project_filter = $input_params{'project_filter'};
 999         if (defined $project_filter) {
1000                 if (!validate_pathname($project_filter)) {
1001                         die_error(404, "Invalid project_filter parameter");
1002                 }
1003         }
1004
1005         our $file_name = $input_params{'file_name'};
1006         if (defined $file_name) {
1007                 if (!validate_pathname($file_name)) {
1008                         die_error(400, "Invalid file parameter");
1009                 }
1010         }
1011
1012         our $file_parent = $input_params{'file_parent'};
1013         if (defined $file_parent) {
1014                 if (!validate_pathname($file_parent)) {
1015                         die_error(400, "Invalid file parent parameter");
1016                 }
1017         }
1018
1019         # parameters which are refnames
1020         our $hash = $input_params{'hash'};
1021         if (defined $hash) {
1022                 if (!validate_refname($hash)) {
1023                         die_error(400, "Invalid hash parameter");
1024                 }
1025         }
1026
1027         our $hash_parent = $input_params{'hash_parent'};
1028         if (defined $hash_parent) {
1029                 if (!validate_refname($hash_parent)) {
1030                         die_error(400, "Invalid hash parent parameter");
1031                 }
1032         }
1033
1034         our $hash_base = $input_params{'hash_base'};
1035         if (defined $hash_base) {
1036                 if (!validate_refname($hash_base)) {
1037                         die_error(400, "Invalid hash base parameter");
1038                 }
1039         }
1040
1041         our @extra_options = @{$input_params{'extra_options'}};
1042         # @extra_options is always defined, since it can only be (currently) set from
1043         # CGI, and $cgi->param() returns the empty array in array context if the param
1044         # is not set
1045         foreach my $opt (@extra_options) {
1046                 if (not exists $allowed_options{$opt}) {
1047                         die_error(400, "Invalid option parameter");
1048                 }
1049                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1050                         die_error(400, "Invalid option parameter for this action");
1051                 }
1052         }
1053
1054         our $hash_parent_base = $input_params{'hash_parent_base'};
1055         if (defined $hash_parent_base) {
1056                 if (!validate_refname($hash_parent_base)) {
1057                         die_error(400, "Invalid hash parent base parameter");
1058                 }
1059         }
1060
1061         # other parameters
1062         our $page = $input_params{'page'};
1063         if (defined $page) {
1064                 if ($page =~ m/[^0-9]/) {
1065                         die_error(400, "Invalid page parameter");
1066                 }
1067         }
1068
1069         our $searchtype = $input_params{'searchtype'};
1070         if (defined $searchtype) {
1071                 if ($searchtype =~ m/[^a-z]/) {
1072                         die_error(400, "Invalid searchtype parameter");
1073                 }
1074         }
1075
1076         our $search_use_regexp = $input_params{'search_use_regexp'};
1077
1078         our $searchtext = $input_params{'searchtext'};
1079         our $search_regexp;
1080         if (defined $searchtext) {
1081                 if (length($searchtext) < 2) {
1082                         die_error(403, "At least two characters are required for search parameter");
1083                 }
1084                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1085         }
1086 }
1087
1088 # path to the current git repository
1089 our $git_dir;
1090 sub evaluate_git_dir {
1091         our $git_dir = "$projectroot/$project" if $project;
1092 }
1093
1094 our (@snapshot_fmts, $git_avatar);
1095 sub configure_gitweb_features {
1096         # list of supported snapshot formats
1097         our @snapshot_fmts = gitweb_get_feature('snapshot');
1098         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1099
1100         # check that the avatar feature is set to a known provider name,
1101         # and for each provider check if the dependencies are satisfied.
1102         # if the provider name is invalid or the dependencies are not met,
1103         # reset $git_avatar to the empty string.
1104         our ($git_avatar) = gitweb_get_feature('avatar');
1105         if ($git_avatar eq 'gravatar') {
1106                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1107         } elsif ($git_avatar eq 'picon') {
1108                 # no dependencies
1109         } else {
1110                 $git_avatar = '';
1111         }
1112 }
1113
1114 # custom error handler: 'die <message>' is Internal Server Error
1115 sub handle_errors_html {
1116         my $msg = shift; # it is already HTML escaped
1117
1118         # to avoid infinite loop where error occurs in die_error,
1119         # change handler to default handler, disabling handle_errors_html
1120         set_message("Error occured when inside die_error:\n$msg");
1121
1122         # you cannot jump out of die_error when called as error handler;
1123         # the subroutine set via CGI::Carp::set_message is called _after_
1124         # HTTP headers are already written, so it cannot write them itself
1125         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1126 }
1127 set_message(\&handle_errors_html);
1128
1129 # dispatch
1130 sub dispatch {
1131         if (!defined $action) {
1132                 if (defined $hash) {
1133                         $action = git_get_type($hash);
1134                         $action or die_error(404, "Object does not exist");
1135                 } elsif (defined $hash_base && defined $file_name) {
1136                         $action = git_get_type("$hash_base:$file_name");
1137                         $action or die_error(404, "File or directory does not exist");
1138                 } elsif (defined $project) {
1139                         $action = 'summary';
1140                 } else {
1141                         $action = 'project_list';
1142                 }
1143         }
1144         if (!defined($actions{$action})) {
1145                 die_error(400, "Unknown action");
1146         }
1147         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1148             !$project) {
1149                 die_error(400, "Project needed");
1150         }
1151         $actions{$action}->();
1152 }
1153
1154 sub reset_timer {
1155         our $t0 = [ gettimeofday() ]
1156                 if defined $t0;
1157         our $number_of_git_cmds = 0;
1158 }
1159
1160 our $first_request = 1;
1161 sub run_request {
1162         reset_timer();
1163
1164         evaluate_uri();
1165         if ($first_request) {
1166                 evaluate_gitweb_config();
1167                 evaluate_git_version();
1168         }
1169         if ($per_request_config) {
1170                 if (ref($per_request_config) eq 'CODE') {
1171                         $per_request_config->();
1172                 } elsif (!$first_request) {
1173                         evaluate_gitweb_config();
1174                 }
1175         }
1176         check_loadavg();
1177
1178         # $projectroot and $projects_list might be set in gitweb config file
1179         $projects_list ||= $projectroot;
1180
1181         evaluate_query_params();
1182         evaluate_path_info();
1183         evaluate_and_validate_params();
1184         evaluate_git_dir();
1185
1186         configure_gitweb_features();
1187
1188         dispatch();
1189 }
1190
1191 our $is_last_request = sub { 1 };
1192 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1193 our $CGI = 'CGI';
1194 our $cgi;
1195 sub configure_as_fcgi {
1196         require CGI::Fast;
1197         our $CGI = 'CGI::Fast';
1198
1199         my $request_number = 0;
1200         # let each child service 100 requests
1201         our $is_last_request = sub { ++$request_number > 100 };
1202 }
1203 sub evaluate_argv {
1204         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1205         configure_as_fcgi()
1206                 if $script_name =~ /\.fcgi$/;
1207
1208         return unless (@ARGV);
1209
1210         require Getopt::Long;
1211         Getopt::Long::GetOptions(
1212                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1213                 'nproc|n=i' => sub {
1214                         my ($arg, $val) = @_;
1215                         return unless eval { require FCGI::ProcManager; 1; };
1216                         my $proc_manager = FCGI::ProcManager->new({
1217                                 n_processes => $val,
1218                         });
1219                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1220                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1221                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1222                 },
1223         );
1224 }
1225
1226 sub run {
1227         evaluate_argv();
1228
1229         $first_request = 1;
1230         $pre_listen_hook->()
1231                 if $pre_listen_hook;
1232
1233  REQUEST:
1234         while ($cgi = $CGI->new()) {
1235                 $pre_dispatch_hook->()
1236                         if $pre_dispatch_hook;
1237
1238                 run_request();
1239
1240                 $post_dispatch_hook->()
1241                         if $post_dispatch_hook;
1242                 $first_request = 0;
1243
1244                 last REQUEST if ($is_last_request->());
1245         }
1246
1247  DONE_GITWEB:
1248         1;
1249 }
1250
1251 run();
1252
1253 if (defined caller) {
1254         # wrapped in a subroutine processing requests,
1255         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1256         return;
1257 } else {
1258         # pure CGI script, serving single request
1259         exit;
1260 }
1261
1262 ## ======================================================================
1263 ## action links
1264
1265 # possible values of extra options
1266 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1267 # -replay => 1      - start from a current view (replay with modifications)
1268 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1269 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1270 sub href {
1271         my %params = @_;
1272         # default is to use -absolute url() i.e. $my_uri
1273         my $href = $params{-full} ? $my_url : $my_uri;
1274
1275         # implicit -replay, must be first of implicit params
1276         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1277
1278         $params{'project'} = $project unless exists $params{'project'};
1279
1280         if ($params{-replay}) {
1281                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1282                         if (!exists $params{$name}) {
1283                                 $params{$name} = $input_params{$name};
1284                         }
1285                 }
1286         }
1287
1288         my $use_pathinfo = gitweb_check_feature('pathinfo');
1289         if (defined $params{'project'} &&
1290             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1291                 # try to put as many parameters as possible in PATH_INFO:
1292                 #   - project name
1293                 #   - action
1294                 #   - hash_parent or hash_parent_base:/file_parent
1295                 #   - hash or hash_base:/filename
1296                 #   - the snapshot_format as an appropriate suffix
1297
1298                 # When the script is the root DirectoryIndex for the domain,
1299                 # $href here would be something like http://gitweb.example.com/
1300                 # Thus, we strip any trailing / from $href, to spare us double
1301                 # slashes in the final URL
1302                 $href =~ s,/$,,;
1303
1304                 # Then add the project name, if present
1305                 $href .= "/".esc_path_info($params{'project'});
1306                 delete $params{'project'};
1307
1308                 # since we destructively absorb parameters, we keep this
1309                 # boolean that remembers if we're handling a snapshot
1310                 my $is_snapshot = $params{'action'} eq 'snapshot';
1311
1312                 # Summary just uses the project path URL, any other action is
1313                 # added to the URL
1314                 if (defined $params{'action'}) {
1315                         $href .= "/".esc_path_info($params{'action'})
1316                                 unless $params{'action'} eq 'summary';
1317                         delete $params{'action'};
1318                 }
1319
1320                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1321                 # stripping nonexistent or useless pieces
1322                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1323                         || $params{'hash_parent'} || $params{'hash'});
1324                 if (defined $params{'hash_base'}) {
1325                         if (defined $params{'hash_parent_base'}) {
1326                                 $href .= esc_path_info($params{'hash_parent_base'});
1327                                 # skip the file_parent if it's the same as the file_name
1328                                 if (defined $params{'file_parent'}) {
1329                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1330                                                 delete $params{'file_parent'};
1331                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1332                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1333                                                 delete $params{'file_parent'};
1334                                         }
1335                                 }
1336                                 $href .= "..";
1337                                 delete $params{'hash_parent'};
1338                                 delete $params{'hash_parent_base'};
1339                         } elsif (defined $params{'hash_parent'}) {
1340                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1341                                 delete $params{'hash_parent'};
1342                         }
1343
1344                         $href .= esc_path_info($params{'hash_base'});
1345                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1346                                 $href .= ":/".esc_path_info($params{'file_name'});
1347                                 delete $params{'file_name'};
1348                         }
1349                         delete $params{'hash'};
1350                         delete $params{'hash_base'};
1351                 } elsif (defined $params{'hash'}) {
1352                         $href .= esc_path_info($params{'hash'});
1353                         delete $params{'hash'};
1354                 }
1355
1356                 # If the action was a snapshot, we can absorb the
1357                 # snapshot_format parameter too
1358                 if ($is_snapshot) {
1359                         my $fmt = $params{'snapshot_format'};
1360                         # snapshot_format should always be defined when href()
1361                         # is called, but just in case some code forgets, we
1362                         # fall back to the default
1363                         $fmt ||= $snapshot_fmts[0];
1364                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1365                         delete $params{'snapshot_format'};
1366                 }
1367         }
1368
1369         # now encode the parameters explicitly
1370         my @result = ();
1371         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1372                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1373                 if (defined $params{$name}) {
1374                         if (ref($params{$name}) eq "ARRAY") {
1375                                 foreach my $par (@{$params{$name}}) {
1376                                         push @result, $symbol . "=" . esc_param($par);
1377                                 }
1378                         } else {
1379                                 push @result, $symbol . "=" . esc_param($params{$name});
1380                         }
1381                 }
1382         }
1383         $href .= "?" . join(';', @result) if scalar @result;
1384
1385         # final transformation: trailing spaces must be escaped (URI-encoded)
1386         $href =~ s/(\s+)$/CGI::escape($1)/e;
1387
1388         if ($params{-anchor}) {
1389                 $href .= "#".esc_param($params{-anchor});
1390         }
1391
1392         return $href;
1393 }
1394
1395
1396 ## ======================================================================
1397 ## validation, quoting/unquoting and escaping
1398
1399 sub validate_action {
1400         my $input = shift || return undef;
1401         return undef unless exists $actions{$input};
1402         return $input;
1403 }
1404
1405 sub validate_project {
1406         my $input = shift || return undef;
1407         if (!validate_pathname($input) ||
1408                 !(-d "$projectroot/$input") ||
1409                 !check_export_ok("$projectroot/$input") ||
1410                 ($strict_export && !project_in_list($input))) {
1411                 return undef;
1412         } else {
1413                 return $input;
1414         }
1415 }
1416
1417 sub validate_pathname {
1418         my $input = shift || return undef;
1419
1420         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1421         # at the beginning, at the end, and between slashes.
1422         # also this catches doubled slashes
1423         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1424                 return undef;
1425         }
1426         # no null characters
1427         if ($input =~ m!\0!) {
1428                 return undef;
1429         }
1430         return $input;
1431 }
1432
1433 sub validate_refname {
1434         my $input = shift || return undef;
1435
1436         # textual hashes are O.K.
1437         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1438                 return $input;
1439         }
1440         # it must be correct pathname
1441         $input = validate_pathname($input)
1442                 or return undef;
1443         # restrictions on ref name according to git-check-ref-format
1444         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1445                 return undef;
1446         }
1447         return $input;
1448 }
1449
1450 # decode sequences of octets in utf8 into Perl's internal form,
1451 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1452 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1453 sub to_utf8 {
1454         my $str = shift;
1455         return undef unless defined $str;
1456
1457         if (utf8::is_utf8($str) || utf8::decode($str)) {
1458                 return $str;
1459         } else {
1460                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1461         }
1462 }
1463
1464 # quote unsafe chars, but keep the slash, even when it's not
1465 # correct, but quoted slashes look too horrible in bookmarks
1466 sub esc_param {
1467         my $str = shift;
1468         return undef unless defined $str;
1469         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1470         $str =~ s/ /\+/g;
1471         return $str;
1472 }
1473
1474 # the quoting rules for path_info fragment are slightly different
1475 sub esc_path_info {
1476         my $str = shift;
1477         return undef unless defined $str;
1478
1479         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1480         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1481
1482         return $str;
1483 }
1484
1485 # quote unsafe chars in whole URL, so some characters cannot be quoted
1486 sub esc_url {
1487         my $str = shift;
1488         return undef unless defined $str;
1489         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1490         $str =~ s/ /\+/g;
1491         return $str;
1492 }
1493
1494 # quote unsafe characters in HTML attributes
1495 sub esc_attr {
1496
1497         # for XHTML conformance escaping '"' to '&quot;' is not enough
1498         return esc_html(@_);
1499 }
1500
1501 # replace invalid utf8 character with SUBSTITUTION sequence
1502 sub esc_html {
1503         my $str = shift;
1504         my %opts = @_;
1505
1506         return undef unless defined $str;
1507
1508         $str = to_utf8($str);
1509         $str = $cgi->escapeHTML($str);
1510         if ($opts{'-nbsp'}) {
1511                 $str =~ s/ /&nbsp;/g;
1512         }
1513         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1514         return $str;
1515 }
1516
1517 # quote control characters and escape filename to HTML
1518 sub esc_path {
1519         my $str = shift;
1520         my %opts = @_;
1521
1522         return undef unless defined $str;
1523
1524         $str = to_utf8($str);
1525         $str = $cgi->escapeHTML($str);
1526         if ($opts{'-nbsp'}) {
1527                 $str =~ s/ /&nbsp;/g;
1528         }
1529         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1530         return $str;
1531 }
1532
1533 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1534 sub sanitize {
1535         my $str = shift;
1536
1537         return undef unless defined $str;
1538
1539         $str = to_utf8($str);
1540         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1541         return $str;
1542 }
1543
1544 # Make control characters "printable", using character escape codes (CEC)
1545 sub quot_cec {
1546         my $cntrl = shift;
1547         my %opts = @_;
1548         my %es = ( # character escape codes, aka escape sequences
1549                 "\t" => '\t',   # tab            (HT)
1550                 "\n" => '\n',   # line feed      (LF)
1551                 "\r" => '\r',   # carrige return (CR)
1552                 "\f" => '\f',   # form feed      (FF)
1553                 "\b" => '\b',   # backspace      (BS)
1554                 "\a" => '\a',   # alarm (bell)   (BEL)
1555                 "\e" => '\e',   # escape         (ESC)
1556                 "\013" => '\v', # vertical tab   (VT)
1557                 "\000" => '\0', # nul character  (NUL)
1558         );
1559         my $chr = ( (exists $es{$cntrl})
1560                     ? $es{$cntrl}
1561                     : sprintf('\%2x', ord($cntrl)) );
1562         if ($opts{-nohtml}) {
1563                 return $chr;
1564         } else {
1565                 return "<span class=\"cntrl\">$chr</span>";
1566         }
1567 }
1568
1569 # Alternatively use unicode control pictures codepoints,
1570 # Unicode "printable representation" (PR)
1571 sub quot_upr {
1572         my $cntrl = shift;
1573         my %opts = @_;
1574
1575         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1576         if ($opts{-nohtml}) {
1577                 return $chr;
1578         } else {
1579                 return "<span class=\"cntrl\">$chr</span>";
1580         }
1581 }
1582
1583 # git may return quoted and escaped filenames
1584 sub unquote {
1585         my $str = shift;
1586
1587         sub unq {
1588                 my $seq = shift;
1589                 my %es = ( # character escape codes, aka escape sequences
1590                         't' => "\t",   # tab            (HT, TAB)
1591                         'n' => "\n",   # newline        (NL)
1592                         'r' => "\r",   # return         (CR)
1593                         'f' => "\f",   # form feed      (FF)
1594                         'b' => "\b",   # backspace      (BS)
1595                         'a' => "\a",   # alarm (bell)   (BEL)
1596                         'e' => "\e",   # escape         (ESC)
1597                         'v' => "\013", # vertical tab   (VT)
1598                 );
1599
1600                 if ($seq =~ m/^[0-7]{1,3}$/) {
1601                         # octal char sequence
1602                         return chr(oct($seq));
1603                 } elsif (exists $es{$seq}) {
1604                         # C escape sequence, aka character escape code
1605                         return $es{$seq};
1606                 }
1607                 # quoted ordinary character
1608                 return $seq;
1609         }
1610
1611         if ($str =~ m/^"(.*)"$/) {
1612                 # needs unquoting
1613                 $str = $1;
1614                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1615         }
1616         return $str;
1617 }
1618
1619 # escape tabs (convert tabs to spaces)
1620 sub untabify {
1621         my $line = shift;
1622
1623         while ((my $pos = index($line, "\t")) != -1) {
1624                 if (my $count = (8 - ($pos % 8))) {
1625                         my $spaces = ' ' x $count;
1626                         $line =~ s/\t/$spaces/;
1627                 }
1628         }
1629
1630         return $line;
1631 }
1632
1633 sub project_in_list {
1634         my $project = shift;
1635         my @list = git_get_projects_list();
1636         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1637 }
1638
1639 ## ----------------------------------------------------------------------
1640 ## HTML aware string manipulation
1641
1642 # Try to chop given string on a word boundary between position
1643 # $len and $len+$add_len. If there is no word boundary there,
1644 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1645 # (marking chopped part) would be longer than given string.
1646 sub chop_str {
1647         my $str = shift;
1648         my $len = shift;
1649         my $add_len = shift || 10;
1650         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1651
1652         # Make sure perl knows it is utf8 encoded so we don't
1653         # cut in the middle of a utf8 multibyte char.
1654         $str = to_utf8($str);
1655
1656         # allow only $len chars, but don't cut a word if it would fit in $add_len
1657         # if it doesn't fit, cut it if it's still longer than the dots we would add
1658         # remove chopped character entities entirely
1659
1660         # when chopping in the middle, distribute $len into left and right part
1661         # return early if chopping wouldn't make string shorter
1662         if ($where eq 'center') {
1663                 return $str if ($len + 5 >= length($str)); # filler is length 5
1664                 $len = int($len/2);
1665         } else {
1666                 return $str if ($len + 4 >= length($str)); # filler is length 4
1667         }
1668
1669         # regexps: ending and beginning with word part up to $add_len
1670         my $endre = qr/.{$len}\w{0,$add_len}/;
1671         my $begre = qr/\w{0,$add_len}.{$len}/;
1672
1673         if ($where eq 'left') {
1674                 $str =~ m/^(.*?)($begre)$/;
1675                 my ($lead, $body) = ($1, $2);
1676                 if (length($lead) > 4) {
1677                         $lead = " ...";
1678                 }
1679                 return "$lead$body";
1680
1681         } elsif ($where eq 'center') {
1682                 $str =~ m/^($endre)(.*)$/;
1683                 my ($left, $str)  = ($1, $2);
1684                 $str =~ m/^(.*?)($begre)$/;
1685                 my ($mid, $right) = ($1, $2);
1686                 if (length($mid) > 5) {
1687                         $mid = " ... ";
1688                 }
1689                 return "$left$mid$right";
1690
1691         } else {
1692                 $str =~ m/^($endre)(.*)$/;
1693                 my $body = $1;
1694                 my $tail = $2;
1695                 if (length($tail) > 4) {
1696                         $tail = "... ";
1697                 }
1698                 return "$body$tail";
1699         }
1700 }
1701
1702 # takes the same arguments as chop_str, but also wraps a <span> around the
1703 # result with a title attribute if it does get chopped. Additionally, the
1704 # string is HTML-escaped.
1705 sub chop_and_escape_str {
1706         my ($str) = @_;
1707
1708         my $chopped = chop_str(@_);
1709         $str = to_utf8($str);
1710         if ($chopped eq $str) {
1711                 return esc_html($chopped);
1712         } else {
1713                 $str =~ s/[[:cntrl:]]/?/g;
1714                 return $cgi->span({-title=>$str}, esc_html($chopped));
1715         }
1716 }
1717
1718 ## ----------------------------------------------------------------------
1719 ## functions returning short strings
1720
1721 # CSS class for given age value (in seconds)
1722 sub age_class {
1723         my $age = shift;
1724
1725         if (!defined $age) {
1726                 return "noage";
1727         } elsif ($age < 60*60*2) {
1728                 return "age0";
1729         } elsif ($age < 60*60*24*2) {
1730                 return "age1";
1731         } else {
1732                 return "age2";
1733         }
1734 }
1735
1736 # convert age in seconds to "nn units ago" string
1737 sub age_string {
1738         my $age = shift;
1739         my $age_str;
1740
1741         if ($age > 60*60*24*365*2) {
1742                 $age_str = (int $age/60/60/24/365);
1743                 $age_str .= " years ago";
1744         } elsif ($age > 60*60*24*(365/12)*2) {
1745                 $age_str = int $age/60/60/24/(365/12);
1746                 $age_str .= " months ago";
1747         } elsif ($age > 60*60*24*7*2) {
1748                 $age_str = int $age/60/60/24/7;
1749                 $age_str .= " weeks ago";
1750         } elsif ($age > 60*60*24*2) {
1751                 $age_str = int $age/60/60/24;
1752                 $age_str .= " days ago";
1753         } elsif ($age > 60*60*2) {
1754                 $age_str = int $age/60/60;
1755                 $age_str .= " hours ago";
1756         } elsif ($age > 60*2) {
1757                 $age_str = int $age/60;
1758                 $age_str .= " min ago";
1759         } elsif ($age > 2) {
1760                 $age_str = int $age;
1761                 $age_str .= " sec ago";
1762         } else {
1763                 $age_str .= " right now";
1764         }
1765         return $age_str;
1766 }
1767
1768 use constant {
1769         S_IFINVALID => 0030000,
1770         S_IFGITLINK => 0160000,
1771 };
1772
1773 # submodule/subproject, a commit object reference
1774 sub S_ISGITLINK {
1775         my $mode = shift;
1776
1777         return (($mode & S_IFMT) == S_IFGITLINK)
1778 }
1779
1780 # convert file mode in octal to symbolic file mode string
1781 sub mode_str {
1782         my $mode = oct shift;
1783
1784         if (S_ISGITLINK($mode)) {
1785                 return 'm---------';
1786         } elsif (S_ISDIR($mode & S_IFMT)) {
1787                 return 'drwxr-xr-x';
1788         } elsif (S_ISLNK($mode)) {
1789                 return 'lrwxrwxrwx';
1790         } elsif (S_ISREG($mode)) {
1791                 # git cares only about the executable bit
1792                 if ($mode & S_IXUSR) {
1793                         return '-rwxr-xr-x';
1794                 } else {
1795                         return '-rw-r--r--';
1796                 };
1797         } else {
1798                 return '----------';
1799         }
1800 }
1801
1802 # convert file mode in octal to file type string
1803 sub file_type {
1804         my $mode = shift;
1805
1806         if ($mode !~ m/^[0-7]+$/) {
1807                 return $mode;
1808         } else {
1809                 $mode = oct $mode;
1810         }
1811
1812         if (S_ISGITLINK($mode)) {
1813                 return "submodule";
1814         } elsif (S_ISDIR($mode & S_IFMT)) {
1815                 return "directory";
1816         } elsif (S_ISLNK($mode)) {
1817                 return "symlink";
1818         } elsif (S_ISREG($mode)) {
1819                 return "file";
1820         } else {
1821                 return "unknown";
1822         }
1823 }
1824
1825 # convert file mode in octal to file type description string
1826 sub file_type_long {
1827         my $mode = shift;
1828
1829         if ($mode !~ m/^[0-7]+$/) {
1830                 return $mode;
1831         } else {
1832                 $mode = oct $mode;
1833         }
1834
1835         if (S_ISGITLINK($mode)) {
1836                 return "submodule";
1837         } elsif (S_ISDIR($mode & S_IFMT)) {
1838                 return "directory";
1839         } elsif (S_ISLNK($mode)) {
1840                 return "symlink";
1841         } elsif (S_ISREG($mode)) {
1842                 if ($mode & S_IXUSR) {
1843                         return "executable";
1844                 } else {
1845                         return "file";
1846                 };
1847         } else {
1848                 return "unknown";
1849         }
1850 }
1851
1852
1853 ## ----------------------------------------------------------------------
1854 ## functions returning short HTML fragments, or transforming HTML fragments
1855 ## which don't belong to other sections
1856
1857 # format line of commit message.
1858 sub format_log_line_html {
1859         my $line = shift;
1860
1861         $line = esc_html($line, -nbsp=>1);
1862         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1863                 $cgi->a({-href => href(action=>"object", hash=>$1),
1864                                         -class => "text"}, $1);
1865         }eg;
1866
1867         return $line;
1868 }
1869
1870 # format marker of refs pointing to given object
1871
1872 # the destination action is chosen based on object type and current context:
1873 # - for annotated tags, we choose the tag view unless it's the current view
1874 #   already, in which case we go to shortlog view
1875 # - for other refs, we keep the current view if we're in history, shortlog or
1876 #   log view, and select shortlog otherwise
1877 sub format_ref_marker {
1878         my ($refs, $id) = @_;
1879         my $markers = '';
1880
1881         if (defined $refs->{$id}) {
1882                 foreach my $ref (@{$refs->{$id}}) {
1883                         # this code exploits the fact that non-lightweight tags are the
1884                         # only indirect objects, and that they are the only objects for which
1885                         # we want to use tag instead of shortlog as action
1886                         my ($type, $name) = qw();
1887                         my $indirect = ($ref =~ s/\^\{\}$//);
1888                         # e.g. tags/v2.6.11 or heads/next
1889                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1890                                 $type = $1;
1891                                 $name = $2;
1892                         } else {
1893                                 $type = "ref";
1894                                 $name = $ref;
1895                         }
1896
1897                         my $class = $type;
1898                         $class .= " indirect" if $indirect;
1899
1900                         my $dest_action = "shortlog";
1901
1902                         if ($indirect) {
1903                                 $dest_action = "tag" unless $action eq "tag";
1904                         } elsif ($action =~ /^(history|(short)?log)$/) {
1905                                 $dest_action = $action;
1906                         }
1907
1908                         my $dest = "";
1909                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1910                         $dest .= $ref;
1911
1912                         my $link = $cgi->a({
1913                                 -href => href(
1914                                         action=>$dest_action,
1915                                         hash=>$dest
1916                                 )}, $name);
1917
1918                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1919                                 $link . "</span>";
1920                 }
1921         }
1922
1923         if ($markers) {
1924                 return ' <span class="refs">'. $markers . '</span>';
1925         } else {
1926                 return "";
1927         }
1928 }
1929
1930 # format, perhaps shortened and with markers, title line
1931 sub format_subject_html {
1932         my ($long, $short, $href, $extra) = @_;
1933         $extra = '' unless defined($extra);
1934
1935         if (length($short) < length($long)) {
1936                 $long =~ s/[[:cntrl:]]/?/g;
1937                 return $cgi->a({-href => $href, -class => "list subject",
1938                                 -title => to_utf8($long)},
1939                        esc_html($short)) . $extra;
1940         } else {
1941                 return $cgi->a({-href => $href, -class => "list subject"},
1942                        esc_html($long)) . $extra;
1943         }
1944 }
1945
1946 # Rather than recomputing the url for an email multiple times, we cache it
1947 # after the first hit. This gives a visible benefit in views where the avatar
1948 # for the same email is used repeatedly (e.g. shortlog).
1949 # The cache is shared by all avatar engines (currently gravatar only), which
1950 # are free to use it as preferred. Since only one avatar engine is used for any
1951 # given page, there's no risk for cache conflicts.
1952 our %avatar_cache = ();
1953
1954 # Compute the picon url for a given email, by using the picon search service over at
1955 # http://www.cs.indiana.edu/picons/search.html
1956 sub picon_url {
1957         my $email = lc shift;
1958         if (!$avatar_cache{$email}) {
1959                 my ($user, $domain) = split('@', $email);
1960                 $avatar_cache{$email} =
1961                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1962                         "$domain/$user/" .
1963                         "users+domains+unknown/up/single";
1964         }
1965         return $avatar_cache{$email};
1966 }
1967
1968 # Compute the gravatar url for a given email, if it's not in the cache already.
1969 # Gravatar stores only the part of the URL before the size, since that's the
1970 # one computationally more expensive. This also allows reuse of the cache for
1971 # different sizes (for this particular engine).
1972 sub gravatar_url {
1973         my $email = lc shift;
1974         my $size = shift;
1975         $avatar_cache{$email} ||=
1976                 "http://www.gravatar.com/avatar/" .
1977                         Digest::MD5::md5_hex($email) . "?s=";
1978         return $avatar_cache{$email} . $size;
1979 }
1980
1981 # Insert an avatar for the given $email at the given $size if the feature
1982 # is enabled.
1983 sub git_get_avatar {
1984         my ($email, %opts) = @_;
1985         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1986         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1987         $opts{-size} ||= 'default';
1988         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1989         my $url = "";
1990         if ($git_avatar eq 'gravatar') {
1991                 $url = gravatar_url($email, $size);
1992         } elsif ($git_avatar eq 'picon') {
1993                 $url = picon_url($email);
1994         }
1995         # Other providers can be added by extending the if chain, defining $url
1996         # as needed. If no variant puts something in $url, we assume avatars
1997         # are completely disabled/unavailable.
1998         if ($url) {
1999                 return $pre_white .
2000                        "<img width=\"$size\" " .
2001                             "class=\"avatar\" " .
2002                             "src=\"".esc_url($url)."\" " .
2003                             "alt=\"\" " .
2004                        "/>" . $post_white;
2005         } else {
2006                 return "";
2007         }
2008 }
2009
2010 sub format_search_author {
2011         my ($author, $searchtype, $displaytext) = @_;
2012         my $have_search = gitweb_check_feature('search');
2013
2014         if ($have_search) {
2015                 my $performed = "";
2016                 if ($searchtype eq 'author') {
2017                         $performed = "authored";
2018                 } elsif ($searchtype eq 'committer') {
2019                         $performed = "committed";
2020                 }
2021
2022                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2023                                 searchtext=>$author,
2024                                 searchtype=>$searchtype), class=>"list",
2025                                 title=>"Search for commits $performed by $author"},
2026                                 $displaytext);
2027
2028         } else {
2029                 return $displaytext;
2030         }
2031 }
2032
2033 # format the author name of the given commit with the given tag
2034 # the author name is chopped and escaped according to the other
2035 # optional parameters (see chop_str).
2036 sub format_author_html {
2037         my $tag = shift;
2038         my $co = shift;
2039         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2040         return "<$tag class=\"author\">" .
2041                format_search_author($co->{'author_name'}, "author",
2042                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2043                        $author) .
2044                "</$tag>";
2045 }
2046
2047 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2048 sub format_git_diff_header_line {
2049         my $line = shift;
2050         my $diffinfo = shift;
2051         my ($from, $to) = @_;
2052
2053         if ($diffinfo->{'nparents'}) {
2054                 # combined diff
2055                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2056                 if ($to->{'href'}) {
2057                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2058                                          esc_path($to->{'file'}));
2059                 } else { # file was deleted (no href)
2060                         $line .= esc_path($to->{'file'});
2061                 }
2062         } else {
2063                 # "ordinary" diff
2064                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2065                 if ($from->{'href'}) {
2066                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2067                                          'a/' . esc_path($from->{'file'}));
2068                 } else { # file was added (no href)
2069                         $line .= 'a/' . esc_path($from->{'file'});
2070                 }
2071                 $line .= ' ';
2072                 if ($to->{'href'}) {
2073                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2074                                          'b/' . esc_path($to->{'file'}));
2075                 } else { # file was deleted
2076                         $line .= 'b/' . esc_path($to->{'file'});
2077                 }
2078         }
2079
2080         return "<div class=\"diff header\">$line</div>\n";
2081 }
2082
2083 # format extended diff header line, before patch itself
2084 sub format_extended_diff_header_line {
2085         my $line = shift;
2086         my $diffinfo = shift;
2087         my ($from, $to) = @_;
2088
2089         # match <path>
2090         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2091                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2092                                        esc_path($from->{'file'}));
2093         }
2094         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2095                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2096                                  esc_path($to->{'file'}));
2097         }
2098         # match single <mode>
2099         if ($line =~ m/\s(\d{6})$/) {
2100                 $line .= '<span class="info"> (' .
2101                          file_type_long($1) .
2102                          ')</span>';
2103         }
2104         # match <hash>
2105         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2106                 # can match only for combined diff
2107                 $line = 'index ';
2108                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2109                         if ($from->{'href'}[$i]) {
2110                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2111                                                   -class=>"hash"},
2112                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2113                         } else {
2114                                 $line .= '0' x 7;
2115                         }
2116                         # separator
2117                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2118                 }
2119                 $line .= '..';
2120                 if ($to->{'href'}) {
2121                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2122                                          substr($diffinfo->{'to_id'},0,7));
2123                 } else {
2124                         $line .= '0' x 7;
2125                 }
2126
2127         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2128                 # can match only for ordinary diff
2129                 my ($from_link, $to_link);
2130                 if ($from->{'href'}) {
2131                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2132                                              substr($diffinfo->{'from_id'},0,7));
2133                 } else {
2134                         $from_link = '0' x 7;
2135                 }
2136                 if ($to->{'href'}) {
2137                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2138                                            substr($diffinfo->{'to_id'},0,7));
2139                 } else {
2140                         $to_link = '0' x 7;
2141                 }
2142                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2143                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2144         }
2145
2146         return $line . "<br/>\n";
2147 }
2148
2149 # format from-file/to-file diff header
2150 sub format_diff_from_to_header {
2151         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2152         my $line;
2153         my $result = '';
2154
2155         $line = $from_line;
2156         #assert($line =~ m/^---/) if DEBUG;
2157         # no extra formatting for "^--- /dev/null"
2158         if (! $diffinfo->{'nparents'}) {
2159                 # ordinary (single parent) diff
2160                 if ($line =~ m!^--- "?a/!) {
2161                         if ($from->{'href'}) {
2162                                 $line = '--- a/' .
2163                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2164                                                 esc_path($from->{'file'}));
2165                         } else {
2166                                 $line = '--- a/' .
2167                                         esc_path($from->{'file'});
2168                         }
2169                 }
2170                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2171
2172         } else {
2173                 # combined diff (merge commit)
2174                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2175                         if ($from->{'href'}[$i]) {
2176                                 $line = '--- ' .
2177                                         $cgi->a({-href=>href(action=>"blobdiff",
2178                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2179                                                              hash_parent_base=>$parents[$i],
2180                                                              file_parent=>$from->{'file'}[$i],
2181                                                              hash=>$diffinfo->{'to_id'},
2182                                                              hash_base=>$hash,
2183                                                              file_name=>$to->{'file'}),
2184                                                  -class=>"path",
2185                                                  -title=>"diff" . ($i+1)},
2186                                                 $i+1) .
2187                                         '/' .
2188                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2189                                                 esc_path($from->{'file'}[$i]));
2190                         } else {
2191                                 $line = '--- /dev/null';
2192                         }
2193                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2194                 }
2195         }
2196
2197         $line = $to_line;
2198         #assert($line =~ m/^\+\+\+/) if DEBUG;
2199         # no extra formatting for "^+++ /dev/null"
2200         if ($line =~ m!^\+\+\+ "?b/!) {
2201                 if ($to->{'href'}) {
2202                         $line = '+++ b/' .
2203                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2204                                         esc_path($to->{'file'}));
2205                 } else {
2206                         $line = '+++ b/' .
2207                                 esc_path($to->{'file'});
2208                 }
2209         }
2210         $result .= qq!<div class="diff to_file">$line</div>\n!;
2211
2212         return $result;
2213 }
2214
2215 # create note for patch simplified by combined diff
2216 sub format_diff_cc_simplified {
2217         my ($diffinfo, @parents) = @_;
2218         my $result = '';
2219
2220         $result .= "<div class=\"diff header\">" .
2221                    "diff --cc ";
2222         if (!is_deleted($diffinfo)) {
2223                 $result .= $cgi->a({-href => href(action=>"blob",
2224                                                   hash_base=>$hash,
2225                                                   hash=>$diffinfo->{'to_id'},
2226                                                   file_name=>$diffinfo->{'to_file'}),
2227                                     -class => "path"},
2228                                    esc_path($diffinfo->{'to_file'}));
2229         } else {
2230                 $result .= esc_path($diffinfo->{'to_file'});
2231         }
2232         $result .= "</div>\n" . # class="diff header"
2233                    "<div class=\"diff nodifferences\">" .
2234                    "Simple merge" .
2235                    "</div>\n"; # class="diff nodifferences"
2236
2237         return $result;
2238 }
2239
2240 sub diff_line_class {
2241         my ($line, $from, $to) = @_;
2242
2243         # ordinary diff
2244         my $num_sign = 1;
2245         # combined diff
2246         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2247                 $num_sign = scalar @{$from->{'href'}};
2248         }
2249
2250         my @diff_line_classifier = (
2251                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2252                 { regexp => qr/^\\/,               class => "incomplete"  },
2253                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2254                 # classifier for context must come before classifier add/rem,
2255                 # or we would have to use more complicated regexp, for example
2256                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2257                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2258                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2259         );
2260         for my $clsfy (@diff_line_classifier) {
2261                 return $clsfy->{'class'}
2262                         if ($line =~ $clsfy->{'regexp'});
2263         }
2264
2265         # fallback
2266         return "";
2267 }
2268
2269 # assumes that $from and $to are defined and correctly filled,
2270 # and that $line holds a line of chunk header for unified diff
2271 sub format_unidiff_chunk_header {
2272         my ($line, $from, $to) = @_;
2273
2274         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2275                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2276
2277         $from_lines = 0 unless defined $from_lines;
2278         $to_lines   = 0 unless defined $to_lines;
2279
2280         if ($from->{'href'}) {
2281                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2282                                      -class=>"list"}, $from_text);
2283         }
2284         if ($to->{'href'}) {
2285                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2286                                      -class=>"list"}, $to_text);
2287         }
2288         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2289                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2290         return $line;
2291 }
2292
2293 # assumes that $from and $to are defined and correctly filled,
2294 # and that $line holds a line of chunk header for combined diff
2295 sub format_cc_diff_chunk_header {
2296         my ($line, $from, $to) = @_;
2297
2298         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2299         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2300
2301         @from_text = split(' ', $ranges);
2302         for (my $i = 0; $i < @from_text; ++$i) {
2303                 ($from_start[$i], $from_nlines[$i]) =
2304                         (split(',', substr($from_text[$i], 1)), 0);
2305         }
2306
2307         $to_text   = pop @from_text;
2308         $to_start  = pop @from_start;
2309         $to_nlines = pop @from_nlines;
2310
2311         $line = "<span class=\"chunk_info\">$prefix ";
2312         for (my $i = 0; $i < @from_text; ++$i) {
2313                 if ($from->{'href'}[$i]) {
2314                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2315                                           -class=>"list"}, $from_text[$i]);
2316                 } else {
2317                         $line .= $from_text[$i];
2318                 }
2319                 $line .= " ";
2320         }
2321         if ($to->{'href'}) {
2322                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2323                                   -class=>"list"}, $to_text);
2324         } else {
2325                 $line .= $to_text;
2326         }
2327         $line .= " $prefix</span>" .
2328                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2329         return $line;
2330 }
2331
2332 # process patch (diff) line (not to be used for diff headers),
2333 # returning class and HTML-formatted (but not wrapped) line
2334 sub process_diff_line {
2335         my $line = shift;
2336         my ($from, $to) = @_;
2337
2338         my $diff_class = diff_line_class($line, $from, $to);
2339
2340         chomp $line;
2341         $line = untabify($line);
2342
2343         if ($from && $to && $line =~ m/^\@{2} /) {
2344                 $line = format_unidiff_chunk_header($line, $from, $to);
2345                 return $diff_class, $line;
2346
2347         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2348                 $line = format_cc_diff_chunk_header($line, $from, $to);
2349                 return $diff_class, $line;
2350
2351         }
2352         return $diff_class, esc_html($line, -nbsp=>1);
2353 }
2354
2355 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2356 # linked.  Pass the hash of the tree/commit to snapshot.
2357 sub format_snapshot_links {
2358         my ($hash) = @_;
2359         my $num_fmts = @snapshot_fmts;
2360         if ($num_fmts > 1) {
2361                 # A parenthesized list of links bearing format names.
2362                 # e.g. "snapshot (_tar.gz_ _zip_)"
2363                 return "snapshot (" . join(' ', map
2364                         $cgi->a({
2365                                 -href => href(
2366                                         action=>"snapshot",
2367                                         hash=>$hash,
2368                                         snapshot_format=>$_
2369                                 )
2370                         }, $known_snapshot_formats{$_}{'display'})
2371                 , @snapshot_fmts) . ")";
2372         } elsif ($num_fmts == 1) {
2373                 # A single "snapshot" link whose tooltip bears the format name.
2374                 # i.e. "_snapshot_"
2375                 my ($fmt) = @snapshot_fmts;
2376                 return
2377                         $cgi->a({
2378                                 -href => href(
2379                                         action=>"snapshot",
2380                                         hash=>$hash,
2381                                         snapshot_format=>$fmt
2382                                 ),
2383                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2384                         }, "snapshot");
2385         } else { # $num_fmts == 0
2386                 return undef;
2387         }
2388 }
2389
2390 ## ......................................................................
2391 ## functions returning values to be passed, perhaps after some
2392 ## transformation, to other functions; e.g. returning arguments to href()
2393
2394 # returns hash to be passed to href to generate gitweb URL
2395 # in -title key it returns description of link
2396 sub get_feed_info {
2397         my $format = shift || 'Atom';
2398         my %res = (action => lc($format));
2399
2400         # feed links are possible only for project views
2401         return unless (defined $project);
2402         # some views should link to OPML, or to generic project feed,
2403         # or don't have specific feed yet (so they should use generic)
2404         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2405
2406         my $branch;
2407         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2408         # from tag links; this also makes possible to detect branch links
2409         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2410             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2411                 $branch = $1;
2412         }
2413         # find log type for feed description (title)
2414         my $type = 'log';
2415         if (defined $file_name) {
2416                 $type  = "history of $file_name";
2417                 $type .= "/" if ($action eq 'tree');
2418                 $type .= " on '$branch'" if (defined $branch);
2419         } else {
2420                 $type = "log of $branch" if (defined $branch);
2421         }
2422
2423         $res{-title} = $type;
2424         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2425         $res{'file_name'} = $file_name;
2426
2427         return %res;
2428 }
2429
2430 ## ----------------------------------------------------------------------
2431 ## git utility subroutines, invoking git commands
2432
2433 # returns path to the core git executable and the --git-dir parameter as list
2434 sub git_cmd {
2435         $number_of_git_cmds++;
2436         return $GIT, '--git-dir='.$git_dir;
2437 }
2438
2439 # quote the given arguments for passing them to the shell
2440 # quote_command("command", "arg 1", "arg with ' and ! characters")
2441 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2442 # Try to avoid using this function wherever possible.
2443 sub quote_command {
2444         return join(' ',
2445                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2446 }
2447
2448 # get HEAD ref of given project as hash
2449 sub git_get_head_hash {
2450         return git_get_full_hash(shift, 'HEAD');
2451 }
2452
2453 sub git_get_full_hash {
2454         return git_get_hash(@_);
2455 }
2456
2457 sub git_get_short_hash {
2458         return git_get_hash(@_, '--short=7');
2459 }
2460
2461 sub git_get_hash {
2462         my ($project, $hash, @options) = @_;
2463         my $o_git_dir = $git_dir;
2464         my $retval = undef;
2465         $git_dir = "$projectroot/$project";
2466         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2467             '--verify', '-q', @options, $hash) {
2468                 $retval = <$fd>;
2469                 chomp $retval if defined $retval;
2470                 close $fd;
2471         }
2472         if (defined $o_git_dir) {
2473                 $git_dir = $o_git_dir;
2474         }
2475         return $retval;
2476 }
2477
2478 # get type of given object
2479 sub git_get_type {
2480         my $hash = shift;
2481
2482         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2483         my $type = <$fd>;
2484         close $fd or return;
2485         chomp $type;
2486         return $type;
2487 }
2488
2489 # repository configuration
2490 our $config_file = '';
2491 our %config;
2492
2493 # store multiple values for single key as anonymous array reference
2494 # single values stored directly in the hash, not as [ <value> ]
2495 sub hash_set_multi {
2496         my ($hash, $key, $value) = @_;
2497
2498         if (!exists $hash->{$key}) {
2499                 $hash->{$key} = $value;
2500         } elsif (!ref $hash->{$key}) {
2501                 $hash->{$key} = [ $hash->{$key}, $value ];
2502         } else {
2503                 push @{$hash->{$key}}, $value;
2504         }
2505 }
2506
2507 # return hash of git project configuration
2508 # optionally limited to some section, e.g. 'gitweb'
2509 sub git_parse_project_config {
2510         my $section_regexp = shift;
2511         my %config;
2512
2513         local $/ = "\0";
2514
2515         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2516                 or return;
2517
2518         while (my $keyval = <$fh>) {
2519                 chomp $keyval;
2520                 my ($key, $value) = split(/\n/, $keyval, 2);
2521
2522                 hash_set_multi(\%config, $key, $value)
2523                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2524         }
2525         close $fh;
2526
2527         return %config;
2528 }
2529
2530 # convert config value to boolean: 'true' or 'false'
2531 # no value, number > 0, 'true' and 'yes' values are true
2532 # rest of values are treated as false (never as error)
2533 sub config_to_bool {
2534         my $val = shift;
2535
2536         return 1 if !defined $val;             # section.key
2537
2538         # strip leading and trailing whitespace
2539         $val =~ s/^\s+//;
2540         $val =~ s/\s+$//;
2541
2542         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2543                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2544 }
2545
2546 # convert config value to simple decimal number
2547 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2548 # to be multiplied by 1024, 1048576, or 1073741824
2549 sub config_to_int {
2550         my $val = shift;
2551
2552         # strip leading and trailing whitespace
2553         $val =~ s/^\s+//;
2554         $val =~ s/\s+$//;
2555
2556         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2557                 $unit = lc($unit);
2558                 # unknown unit is treated as 1
2559                 return $num * ($unit eq 'g' ? 1073741824 :
2560                                $unit eq 'm' ?    1048576 :
2561                                $unit eq 'k' ?       1024 : 1);
2562         }
2563         return $val;
2564 }
2565
2566 # convert config value to array reference, if needed
2567 sub config_to_multi {
2568         my $val = shift;
2569
2570         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2571 }
2572
2573 sub git_get_project_config {
2574         my ($key, $type) = @_;
2575
2576         return unless defined $git_dir;
2577
2578         # key sanity check
2579         return unless ($key);
2580         # only subsection, if exists, is case sensitive,
2581         # and not lowercased by 'git config -z -l'
2582         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2583                 $key = join(".", lc($hi), $mi, lc($lo));
2584         } else {
2585                 $key = lc($key);
2586         }
2587         $key =~ s/^gitweb\.//;
2588         return if ($key =~ m/\W/);
2589
2590         # type sanity check
2591         if (defined $type) {
2592                 $type =~ s/^--//;
2593                 $type = undef
2594                         unless ($type eq 'bool' || $type eq 'int');
2595         }
2596
2597         # get config
2598         if (!defined $config_file ||
2599             $config_file ne "$git_dir/config") {
2600                 %config = git_parse_project_config('gitweb');
2601                 $config_file = "$git_dir/config";
2602         }
2603
2604         # check if config variable (key) exists
2605         return unless exists $config{"gitweb.$key"};
2606
2607         # ensure given type
2608         if (!defined $type) {
2609                 return $config{"gitweb.$key"};
2610         } elsif ($type eq 'bool') {
2611                 # backward compatibility: 'git config --bool' returns true/false
2612                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2613         } elsif ($type eq 'int') {
2614                 return config_to_int($config{"gitweb.$key"});
2615         }
2616         return $config{"gitweb.$key"};
2617 }
2618
2619 # get hash of given path at given ref
2620 sub git_get_hash_by_path {
2621         my $base = shift;
2622         my $path = shift || return undef;
2623         my $type = shift;
2624
2625         $path =~ s,/+$,,;
2626
2627         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2628                 or die_error(500, "Open git-ls-tree failed");
2629         my $line = <$fd>;
2630         close $fd or return undef;
2631
2632         if (!defined $line) {
2633                 # there is no tree or hash given by $path at $base
2634                 return undef;
2635         }
2636
2637         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2638         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2639         if (defined $type && $type ne $2) {
2640                 # type doesn't match
2641                 return undef;
2642         }
2643         return $3;
2644 }
2645
2646 # get path of entry with given hash at given tree-ish (ref)
2647 # used to get 'from' filename for combined diff (merge commit) for renames
2648 sub git_get_path_by_hash {
2649         my $base = shift || return;
2650         my $hash = shift || return;
2651
2652         local $/ = "\0";
2653
2654         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2655                 or return undef;
2656         while (my $line = <$fd>) {
2657                 chomp $line;
2658
2659                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2660                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2661                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2662                         close $fd;
2663                         return $1;
2664                 }
2665         }
2666         close $fd;
2667         return undef;
2668 }
2669
2670 ## ......................................................................
2671 ## git utility functions, directly accessing git repository
2672
2673 # get the value of config variable either from file named as the variable
2674 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2675 # configuration variable in the repository config file.
2676 sub git_get_file_or_project_config {
2677         my ($path, $name) = @_;
2678
2679         $git_dir = "$projectroot/$path";
2680         open my $fd, '<', "$git_dir/$name"
2681                 or return git_get_project_config($name);
2682         my $conf = <$fd>;
2683         close $fd;
2684         if (defined $conf) {
2685                 chomp $conf;
2686         }
2687         return $conf;
2688 }
2689
2690 sub git_get_project_description {
2691         my $path = shift;
2692         return git_get_file_or_project_config($path, 'description');
2693 }
2694
2695 sub git_get_project_category {
2696         my $path = shift;
2697         return git_get_file_or_project_config($path, 'category');
2698 }
2699
2700
2701 # supported formats:
2702 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2703 #   - if its contents is a number, use it as tag weight,
2704 #   - otherwise add a tag with weight 1
2705 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2706 #   the same value multiple times increases tag weight
2707 # * `gitweb.ctag' multi-valued repo config variable
2708 sub git_get_project_ctags {
2709         my $project = shift;
2710         my $ctags = {};
2711
2712         $git_dir = "$projectroot/$project";
2713         if (opendir my $dh, "$git_dir/ctags") {
2714                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2715                 foreach my $tagfile (@files) {
2716                         open my $ct, '<', $tagfile
2717                                 or next;
2718                         my $val = <$ct>;
2719                         chomp $val if $val;
2720                         close $ct;
2721
2722                         (my $ctag = $tagfile) =~ s#.*/##;
2723                         if ($val =~ /^\d+$/) {
2724                                 $ctags->{$ctag} = $val;
2725                         } else {
2726                                 $ctags->{$ctag} = 1;
2727                         }
2728                 }
2729                 closedir $dh;
2730
2731         } elsif (open my $fh, '<', "$git_dir/ctags") {
2732                 while (my $line = <$fh>) {
2733                         chomp $line;
2734                         $ctags->{$line}++ if $line;
2735                 }
2736                 close $fh;
2737
2738         } else {
2739                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2740                 foreach my $tag (@$taglist) {
2741                         $ctags->{$tag}++;
2742                 }
2743         }
2744
2745         return $ctags;
2746 }
2747
2748 # return hash, where keys are content tags ('ctags'),
2749 # and values are sum of weights of given tag in every project
2750 sub git_gather_all_ctags {
2751         my $projects = shift;
2752         my $ctags = {};
2753
2754         foreach my $p (@$projects) {
2755                 foreach my $ct (keys %{$p->{'ctags'}}) {
2756                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2757                 }
2758         }
2759
2760         return $ctags;
2761 }
2762
2763 sub git_populate_project_tagcloud {
2764         my $ctags = shift;
2765
2766         # First, merge different-cased tags; tags vote on casing
2767         my %ctags_lc;
2768         foreach (keys %$ctags) {
2769                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2770                 if (not $ctags_lc{lc $_}->{topcount}
2771                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2772                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2773                         $ctags_lc{lc $_}->{topname} = $_;
2774                 }
2775         }
2776
2777         my $cloud;
2778         my $matched = $input_params{'ctag'};
2779         if (eval { require HTML::TagCloud; 1; }) {
2780                 $cloud = HTML::TagCloud->new;
2781                 foreach my $ctag (sort keys %ctags_lc) {
2782                         # Pad the title with spaces so that the cloud looks
2783                         # less crammed.
2784                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2785                         $title =~ s/ /&nbsp;/g;
2786                         $title =~ s/^/&nbsp;/g;
2787                         $title =~ s/$/&nbsp;/g;
2788                         if (defined $matched && $matched eq $ctag) {
2789                                 $title = qq(<span class="match">$title</span>);
2790                         }
2791                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2792                                     $ctags_lc{$ctag}->{count});
2793                 }
2794         } else {
2795                 $cloud = {};
2796                 foreach my $ctag (keys %ctags_lc) {
2797                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2798                         if (defined $matched && $matched eq $ctag) {
2799                                 $title = qq(<span class="match">$title</span>);
2800                         }
2801                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2802                         $cloud->{$ctag}{ctag} =
2803                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2804                 }
2805         }
2806         return $cloud;
2807 }
2808
2809 sub git_show_project_tagcloud {
2810         my ($cloud, $count) = @_;
2811         if (ref $cloud eq 'HTML::TagCloud') {
2812                 return $cloud->html_and_css($count);
2813         } else {
2814                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2815                 return
2816                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2817                         join (', ', map {
2818                                 $cloud->{$_}->{'ctag'}
2819                         } splice(@tags, 0, $count)) .
2820                         '</div>';
2821         }
2822 }
2823
2824 sub git_get_project_url_list {
2825         my $path = shift;
2826
2827         $git_dir = "$projectroot/$path";
2828         open my $fd, '<', "$git_dir/cloneurl"
2829                 or return wantarray ?
2830                 @{ config_to_multi(git_get_project_config('url')) } :
2831                    config_to_multi(git_get_project_config('url'));
2832         my @git_project_url_list = map { chomp; $_ } <$fd>;
2833         close $fd;
2834
2835         return wantarray ? @git_project_url_list : \@git_project_url_list;
2836 }
2837
2838 sub git_get_projects_list {
2839         my $filter = shift || '';
2840         my $paranoid = shift;
2841         my @list;
2842
2843         if (-d $projects_list) {
2844                 # search in directory
2845                 my $dir = $projects_list;
2846                 # remove the trailing "/"
2847                 $dir =~ s!/+$!!;
2848                 my $pfxlen = length("$dir");
2849                 my $pfxdepth = ($dir =~ tr!/!!);
2850                 # when filtering, search only given subdirectory
2851                 if ($filter && !$paranoid) {
2852                         $dir .= "/$filter";
2853                         $dir =~ s!/+$!!;
2854                 }
2855
2856                 File::Find::find({
2857                         follow_fast => 1, # follow symbolic links
2858                         follow_skip => 2, # ignore duplicates
2859                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2860                         wanted => sub {
2861                                 # global variables
2862                                 our $project_maxdepth;
2863                                 our $projectroot;
2864                                 # skip project-list toplevel, if we get it.
2865                                 return if (m!^[/.]$!);
2866                                 # only directories can be git repositories
2867                                 return unless (-d $_);
2868                                 # don't traverse too deep (Find is super slow on os x)
2869                                 # $project_maxdepth excludes depth of $projectroot
2870                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2871                                         $File::Find::prune = 1;
2872                                         return;
2873                                 }
2874
2875                                 my $path = substr($File::Find::name, $pfxlen + 1);
2876                                 # paranoidly only filter here
2877                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2878                                         next;
2879                                 }
2880                                 # we check related file in $projectroot
2881                                 if (check_export_ok("$projectroot/$path")) {
2882                                         push @list, { path => $path };
2883                                         $File::Find::prune = 1;
2884                                 }
2885                         },
2886                 }, "$dir");
2887
2888         } elsif (-f $projects_list) {
2889                 # read from file(url-encoded):
2890                 # 'git%2Fgit.git Linus+Torvalds'
2891                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2892                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2893                 open my $fd, '<', $projects_list or return;
2894         PROJECT:
2895                 while (my $line = <$fd>) {
2896                         chomp $line;
2897                         my ($path, $owner) = split ' ', $line;
2898                         $path = unescape($path);
2899                         $owner = unescape($owner);
2900                         if (!defined $path) {
2901                                 next;
2902                         }
2903                         # if $filter is rpovided, check if $path begins with $filter
2904                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2905                                 next;
2906                         }
2907                         if (check_export_ok("$projectroot/$path")) {
2908                                 my $pr = {
2909                                         path => $path,
2910                                         owner => to_utf8($owner),
2911                                 };
2912                                 push @list, $pr;
2913                         }
2914                 }
2915                 close $fd;
2916         }
2917         return @list;
2918 }
2919
2920 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2921 # as side effects it sets 'forks' field to list of forks for forked projects
2922 sub filter_forks_from_projects_list {
2923         my $projects = shift;
2924
2925         my %trie; # prefix tree of directories (path components)
2926         # generate trie out of those directories that might contain forks
2927         foreach my $pr (@$projects) {
2928                 my $path = $pr->{'path'};
2929                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2930                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2931                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2932                 next unless (-d "$projectroot/$path"); # containing directory exists
2933                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2934
2935                 # add to trie
2936                 my @dirs = split('/', $path);
2937                 # walk the trie, until either runs out of components or out of trie
2938                 my $ref = \%trie;
2939                 while (scalar @dirs &&
2940                        exists($ref->{$dirs[0]})) {
2941                         $ref = $ref->{shift @dirs};
2942                 }
2943                 # create rest of trie structure from rest of components
2944                 foreach my $dir (@dirs) {
2945                         $ref = $ref->{$dir} = {};
2946                 }
2947                 # create end marker, store $pr as a data
2948                 $ref->{''} = $pr if (!exists $ref->{''});
2949         }
2950
2951         # filter out forks, by finding shortest prefix match for paths
2952         my @filtered;
2953  PROJECT:
2954         foreach my $pr (@$projects) {
2955                 # trie lookup
2956                 my $ref = \%trie;
2957         DIR:
2958                 foreach my $dir (split('/', $pr->{'path'})) {
2959                         if (exists $ref->{''}) {
2960                                 # found [shortest] prefix, is a fork - skip it
2961                                 push @{$ref->{''}{'forks'}}, $pr;
2962                                 next PROJECT;
2963                         }
2964                         if (!exists $ref->{$dir}) {
2965                                 # not in trie, cannot have prefix, not a fork
2966                                 push @filtered, $pr;
2967                                 next PROJECT;
2968                         }
2969                         # If the dir is there, we just walk one step down the trie.
2970                         $ref = $ref->{$dir};
2971                 }
2972                 # we ran out of trie
2973                 # (shouldn't happen: it's either no match, or end marker)
2974                 push @filtered, $pr;
2975         }
2976
2977         return @filtered;
2978 }
2979
2980 # note: fill_project_list_info must be run first,
2981 # for 'descr_long' and 'ctags' to be filled
2982 sub search_projects_list {
2983         my ($projlist, %opts) = @_;
2984         my $tagfilter  = $opts{'tagfilter'};
2985         my $searchtext = $opts{'searchtext'};
2986
2987         return @$projlist
2988                 unless ($tagfilter || $searchtext);
2989
2990         my @projects;
2991  PROJECT:
2992         foreach my $pr (@$projlist) {
2993
2994                 if ($tagfilter) {
2995                         next unless ref($pr->{'ctags'}) eq 'HASH';
2996                         next unless
2997                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2998                 }
2999
3000                 if ($searchtext) {
3001                         next unless
3002                                 $pr->{'path'} =~ /$searchtext/ ||
3003                                 $pr->{'descr_long'} =~ /$searchtext/;
3004                 }
3005
3006                 push @projects, $pr;
3007         }
3008
3009         return @projects;
3010 }
3011
3012 our $gitweb_project_owner = undef;
3013 sub git_get_project_list_from_file {
3014
3015         return if (defined $gitweb_project_owner);
3016
3017         $gitweb_project_owner = {};
3018         # read from file (url-encoded):
3019         # 'git%2Fgit.git Linus+Torvalds'
3020         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3021         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3022         if (-f $projects_list) {
3023                 open(my $fd, '<', $projects_list);
3024                 while (my $line = <$fd>) {
3025                         chomp $line;
3026                         my ($pr, $ow) = split ' ', $line;
3027                         $pr = unescape($pr);
3028                         $ow = unescape($ow);
3029                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3030                 }
3031                 close $fd;
3032         }
3033 }
3034
3035 sub git_get_project_owner {
3036         my $project = shift;
3037         my $owner;
3038
3039         return undef unless $project;
3040         $git_dir = "$projectroot/$project";
3041
3042         if (!defined $gitweb_project_owner) {
3043                 git_get_project_list_from_file();
3044         }
3045
3046         if (exists $gitweb_project_owner->{$project}) {
3047                 $owner = $gitweb_project_owner->{$project};
3048         }
3049         if (!defined $owner){
3050                 $owner = git_get_project_config('owner');
3051         }
3052         if (!defined $owner) {
3053                 $owner = get_file_owner("$git_dir");
3054         }
3055
3056         return $owner;
3057 }
3058
3059 sub git_get_last_activity {
3060         my ($path) = @_;
3061         my $fd;
3062
3063         $git_dir = "$projectroot/$path";
3064         open($fd, "-|", git_cmd(), 'for-each-ref',
3065              '--format=%(committer)',
3066              '--sort=-committerdate',
3067              '--count=1',
3068              'refs/heads') or return;
3069         my $most_recent = <$fd>;
3070         close $fd or return;
3071         if (defined $most_recent &&
3072             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3073                 my $timestamp = $1;
3074                 my $age = time - $timestamp;
3075                 return ($age, age_string($age));
3076         }
3077         return (undef, undef);
3078 }
3079
3080 # Implementation note: when a single remote is wanted, we cannot use 'git
3081 # remote show -n' because that command always work (assuming it's a remote URL
3082 # if it's not defined), and we cannot use 'git remote show' because that would
3083 # try to make a network roundtrip. So the only way to find if that particular
3084 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3085 # and when we find what we want.
3086 sub git_get_remotes_list {
3087         my $wanted = shift;
3088         my %remotes = ();
3089
3090         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3091         return unless $fd;
3092         while (my $remote = <$fd>) {
3093                 chomp $remote;
3094                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3095                 next if $wanted and not $remote eq $wanted;
3096                 my ($url, $key) = ($1, $2);
3097
3098                 $remotes{$remote} ||= { 'heads' => () };
3099                 $remotes{$remote}{$key} = $url;
3100         }
3101         close $fd or return;
3102         return wantarray ? %remotes : \%remotes;
3103 }
3104
3105 # Takes a hash of remotes as first parameter and fills it by adding the
3106 # available remote heads for each of the indicated remotes.
3107 sub fill_remote_heads {
3108         my $remotes = shift;
3109         my @heads = map { "remotes/$_" } keys %$remotes;
3110         my @remoteheads = git_get_heads_list(undef, @heads);
3111         foreach my $remote (keys %$remotes) {
3112                 $remotes->{$remote}{'heads'} = [ grep {
3113                         $_->{'name'} =~ s!^$remote/!!
3114                         } @remoteheads ];
3115         }
3116 }
3117
3118 sub git_get_references {
3119         my $type = shift || "";
3120         my %refs;
3121         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3122         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3123         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3124                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3125                 or return;
3126
3127         while (my $line = <$fd>) {
3128                 chomp $line;
3129                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3130                         if (defined $refs{$1}) {
3131                                 push @{$refs{$1}}, $2;
3132                         } else {
3133                                 $refs{$1} = [ $2 ];
3134                         }
3135                 }
3136         }
3137         close $fd or return;
3138         return \%refs;
3139 }
3140
3141 sub git_get_rev_name_tags {
3142         my $hash = shift || return undef;
3143
3144         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3145                 or return;
3146         my $name_rev = <$fd>;
3147         close $fd;
3148
3149         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3150                 return $1;
3151         } else {
3152                 # catches also '$hash undefined' output
3153                 return undef;
3154         }
3155 }
3156
3157 ## ----------------------------------------------------------------------
3158 ## parse to hash functions
3159
3160 sub parse_date {
3161         my $epoch = shift;
3162         my $tz = shift || "-0000";
3163
3164         my %date;
3165         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3166         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3167         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3168         $date{'hour'} = $hour;
3169         $date{'minute'} = $min;
3170         $date{'mday'} = $mday;
3171         $date{'day'} = $days[$wday];
3172         $date{'month'} = $months[$mon];
3173         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3174                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3175         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3176                              $mday, $months[$mon], $hour ,$min;
3177         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3178                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3179
3180         my ($tz_sign, $tz_hour, $tz_min) =
3181                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3182         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3183         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3184         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3185         $date{'hour_local'} = $hour;
3186         $date{'minute_local'} = $min;
3187         $date{'tz_local'} = $tz;
3188         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3189                                   1900+$year, $mon+1, $mday,
3190                                   $hour, $min, $sec, $tz);
3191         return %date;
3192 }
3193
3194 sub parse_tag {
3195         my $tag_id = shift;
3196         my %tag;
3197         my @comment;
3198
3199         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3200         $tag{'id'} = $tag_id;
3201         while (my $line = <$fd>) {
3202                 chomp $line;
3203                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3204                         $tag{'object'} = $1;
3205                 } elsif ($line =~ m/^type (.+)$/) {
3206                         $tag{'type'} = $1;
3207                 } elsif ($line =~ m/^tag (.+)$/) {
3208                         $tag{'name'} = $1;
3209                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3210                         $tag{'author'} = $1;
3211                         $tag{'author_epoch'} = $2;
3212                         $tag{'author_tz'} = $3;
3213                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3214                                 $tag{'author_name'}  = $1;
3215                                 $tag{'author_email'} = $2;
3216                         } else {
3217                                 $tag{'author_name'} = $tag{'author'};
3218                         }
3219                 } elsif ($line =~ m/--BEGIN/) {
3220                         push @comment, $line;
3221                         last;
3222                 } elsif ($line eq "") {
3223                         last;
3224                 }
3225         }
3226         push @comment, <$fd>;
3227         $tag{'comment'} = \@comment;
3228         close $fd or return;
3229         if (!defined $tag{'name'}) {
3230                 return
3231         };
3232         return %tag
3233 }
3234
3235 sub parse_commit_text {
3236         my ($commit_text, $withparents) = @_;
3237         my @commit_lines = split '\n', $commit_text;
3238         my %co;
3239
3240         pop @commit_lines; # Remove '\0'
3241
3242         if (! @commit_lines) {
3243                 return;
3244         }
3245
3246         my $header = shift @commit_lines;
3247         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3248                 return;
3249         }
3250         ($co{'id'}, my @parents) = split ' ', $header;
3251         while (my $line = shift @commit_lines) {
3252                 last if $line eq "\n";
3253                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3254                         $co{'tree'} = $1;
3255                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3256                         push @parents, $1;
3257                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3258                         $co{'author'} = to_utf8($1);
3259                         $co{'author_epoch'} = $2;
3260                         $co{'author_tz'} = $3;
3261                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3262                                 $co{'author_name'}  = $1;
3263                                 $co{'author_email'} = $2;
3264                         } else {
3265                                 $co{'author_name'} = $co{'author'};
3266                         }
3267                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3268                         $co{'committer'} = to_utf8($1);
3269                         $co{'committer_epoch'} = $2;
3270                         $co{'committer_tz'} = $3;
3271                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3272                                 $co{'committer_name'}  = $1;
3273                                 $co{'committer_email'} = $2;
3274                         } else {
3275                                 $co{'committer_name'} = $co{'committer'};
3276                         }
3277                 }
3278         }
3279         if (!defined $co{'tree'}) {
3280                 return;
3281         };
3282         $co{'parents'} = \@parents;
3283         $co{'parent'} = $parents[0];
3284
3285         foreach my $title (@commit_lines) {
3286                 $title =~ s/^    //;
3287                 if ($title ne "") {
3288                         $co{'title'} = chop_str($title, 80, 5);
3289                         # remove leading stuff of merges to make the interesting part visible
3290                         if (length($title) > 50) {
3291                                 $title =~ s/^Automatic //;
3292                                 $title =~ s/^merge (of|with) /Merge ... /i;
3293                                 if (length($title) > 50) {
3294                                         $title =~ s/(http|rsync):\/\///;
3295                                 }
3296                                 if (length($title) > 50) {
3297                                         $title =~ s/(master|www|rsync)\.//;
3298                                 }
3299                                 if (length($title) > 50) {
3300                                         $title =~ s/kernel.org:?//;
3301                                 }
3302                                 if (length($title) > 50) {
3303                                         $title =~ s/\/pub\/scm//;
3304                                 }
3305                         }
3306                         $co{'title_short'} = chop_str($title, 50, 5);
3307                         last;
3308                 }
3309         }
3310         if (! defined $co{'title'} || $co{'title'} eq "") {
3311                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3312         }
3313         # remove added spaces
3314         foreach my $line (@commit_lines) {
3315                 $line =~ s/^    //;
3316         }
3317         $co{'comment'} = \@commit_lines;
3318
3319         my $age = time - $co{'committer_epoch'};
3320         $co{'age'} = $age;
3321         $co{'age_string'} = age_string($age);
3322         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3323         if ($age > 60*60*24*7*2) {
3324                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3325                 $co{'age_string_age'} = $co{'age_string'};
3326         } else {
3327                 $co{'age_string_date'} = $co{'age_string'};
3328                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3329         }
3330         return %co;
3331 }
3332
3333 sub parse_commit {
3334         my ($commit_id) = @_;
3335         my %co;
3336
3337         local $/ = "\0";
3338
3339         open my $fd, "-|", git_cmd(), "rev-list",
3340                 "--parents",
3341                 "--header",
3342                 "--max-count=1",
3343                 $commit_id,
3344                 "--",
3345                 or die_error(500, "Open git-rev-list failed");
3346         %co = parse_commit_text(<$fd>, 1);
3347         close $fd;
3348
3349         return %co;
3350 }
3351
3352 sub parse_commits {
3353         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3354         my @cos;
3355
3356         $maxcount ||= 1;
3357         $skip ||= 0;
3358
3359         local $/ = "\0";
3360
3361         open my $fd, "-|", git_cmd(), "rev-list",
3362                 "--header",
3363                 @args,
3364                 ("--max-count=" . $maxcount),
3365                 ("--skip=" . $skip),
3366                 @extra_options,
3367                 $commit_id,
3368                 "--",
3369                 ($filename ? ($filename) : ())
3370                 or die_error(500, "Open git-rev-list failed");
3371         while (my $line = <$fd>) {
3372                 my %co = parse_commit_text($line);
3373                 push @cos, \%co;
3374         }
3375         close $fd;
3376
3377         return wantarray ? @cos : \@cos;
3378 }
3379
3380 # parse line of git-diff-tree "raw" output
3381 sub parse_difftree_raw_line {
3382         my $line = shift;
3383         my %res;
3384
3385         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3386         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3387         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3388                 $res{'from_mode'} = $1;
3389                 $res{'to_mode'} = $2;
3390                 $res{'from_id'} = $3;
3391                 $res{'to_id'} = $4;
3392                 $res{'status'} = $5;
3393                 $res{'similarity'} = $6;
3394                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3395                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3396                 } else {
3397                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3398                 }
3399         }
3400         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3401         # combined diff (for merge commit)
3402         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3403                 $res{'nparents'}  = length($1);
3404                 $res{'from_mode'} = [ split(' ', $2) ];
3405                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3406                 $res{'from_id'} = [ split(' ', $3) ];
3407                 $res{'to_id'} = pop @{$res{'from_id'}};
3408                 $res{'status'} = [ split('', $4) ];
3409                 $res{'to_file'} = unquote($5);
3410         }
3411         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3412         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3413                 $res{'commit'} = $1;
3414         }
3415
3416         return wantarray ? %res : \%res;
3417 }
3418
3419 # wrapper: return parsed line of git-diff-tree "raw" output
3420 # (the argument might be raw line, or parsed info)
3421 sub parsed_difftree_line {
3422         my $line_or_ref = shift;
3423
3424         if (ref($line_or_ref) eq "HASH") {
3425                 # pre-parsed (or generated by hand)
3426                 return $line_or_ref;
3427         } else {
3428                 return parse_difftree_raw_line($line_or_ref);
3429         }
3430 }
3431
3432 # parse line of git-ls-tree output
3433 sub parse_ls_tree_line {
3434         my $line = shift;
3435         my %opts = @_;
3436         my %res;
3437
3438         if ($opts{'-l'}) {
3439                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3440                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3441
3442                 $res{'mode'} = $1;
3443                 $res{'type'} = $2;
3444                 $res{'hash'} = $3;
3445                 $res{'size'} = $4;
3446                 if ($opts{'-z'}) {
3447                         $res{'name'} = $5;
3448                 } else {
3449                         $res{'name'} = unquote($5);
3450                 }
3451         } else {
3452                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3453                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3454
3455                 $res{'mode'} = $1;
3456                 $res{'type'} = $2;
3457                 $res{'hash'} = $3;
3458                 if ($opts{'-z'}) {
3459                         $res{'name'} = $4;
3460                 } else {
3461                         $res{'name'} = unquote($4);
3462                 }
3463         }
3464
3465         return wantarray ? %res : \%res;
3466 }
3467
3468 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3469 sub parse_from_to_diffinfo {
3470         my ($diffinfo, $from, $to, @parents) = @_;
3471
3472         if ($diffinfo->{'nparents'}) {
3473                 # combined diff
3474                 $from->{'file'} = [];
3475                 $from->{'href'} = [];
3476                 fill_from_file_info($diffinfo, @parents)
3477                         unless exists $diffinfo->{'from_file'};
3478                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3479                         $from->{'file'}[$i] =
3480                                 defined $diffinfo->{'from_file'}[$i] ?
3481                                         $diffinfo->{'from_file'}[$i] :
3482                                         $diffinfo->{'to_file'};
3483                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3484                                 $from->{'href'}[$i] = href(action=>"blob",
3485                                                            hash_base=>$parents[$i],
3486                                                            hash=>$diffinfo->{'from_id'}[$i],
3487                                                            file_name=>$from->{'file'}[$i]);
3488                         } else {
3489                                 $from->{'href'}[$i] = undef;
3490                         }
3491                 }
3492         } else {
3493                 # ordinary (not combined) diff
3494                 $from->{'file'} = $diffinfo->{'from_file'};
3495                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3496                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3497                                                hash=>$diffinfo->{'from_id'},
3498                                                file_name=>$from->{'file'});
3499                 } else {
3500                         delete $from->{'href'};
3501                 }
3502         }
3503
3504         $to->{'file'} = $diffinfo->{'to_file'};
3505         if (!is_deleted($diffinfo)) { # file exists in result
3506                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3507                                      hash=>$diffinfo->{'to_id'},
3508                                      file_name=>$to->{'file'});
3509         } else {
3510                 delete $to->{'href'};
3511         }
3512 }
3513
3514 ## ......................................................................
3515 ## parse to array of hashes functions
3516
3517 sub git_get_heads_list {
3518         my ($limit, @classes) = @_;
3519         @classes = ('heads') unless @classes;
3520         my @patterns = map { "refs/$_" } @classes;
3521         my @headslist;
3522
3523         open my $fd, '-|', git_cmd(), 'for-each-ref',
3524                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3525                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3526                 @patterns
3527                 or return;
3528         while (my $line = <$fd>) {
3529                 my %ref_item;
3530
3531                 chomp $line;
3532                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3533                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3534                 my ($committer, $epoch, $tz) =
3535                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3536                 $ref_item{'fullname'}  = $name;
3537                 $name =~ s!^refs/(?:head|remote)s/!!;
3538
3539                 $ref_item{'name'}  = $name;
3540                 $ref_item{'id'}    = $hash;
3541                 $ref_item{'title'} = $title || '(no commit message)';
3542                 $ref_item{'epoch'} = $epoch;
3543                 if ($epoch) {
3544                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3545                 } else {
3546                         $ref_item{'age'} = "unknown";
3547                 }
3548
3549                 push @headslist, \%ref_item;
3550         }
3551         close $fd;
3552
3553         return wantarray ? @headslist : \@headslist;
3554 }
3555
3556 sub git_get_tags_list {
3557         my $limit = shift;
3558         my @tagslist;
3559
3560         open my $fd, '-|', git_cmd(), 'for-each-ref',
3561                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3562                 '--format=%(objectname) %(objecttype) %(refname) '.
3563                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3564                 'refs/tags'
3565                 or return;
3566         while (my $line = <$fd>) {
3567                 my %ref_item;
3568
3569                 chomp $line;
3570                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3571                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3572                 my ($creator, $epoch, $tz) =
3573                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3574                 $ref_item{'fullname'} = $name;
3575                 $name =~ s!^refs/tags/!!;
3576
3577                 $ref_item{'type'} = $type;
3578                 $ref_item{'id'} = $id;
3579                 $ref_item{'name'} = $name;
3580                 if ($type eq "tag") {
3581                         $ref_item{'subject'} = $title;
3582                         $ref_item{'reftype'} = $reftype;
3583                         $ref_item{'refid'}   = $refid;
3584                 } else {
3585                         $ref_item{'reftype'} = $type;
3586                         $ref_item{'refid'}   = $id;
3587                 }
3588
3589                 if ($type eq "tag" || $type eq "commit") {
3590                         $ref_item{'epoch'} = $epoch;
3591                         if ($epoch) {
3592                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3593                         } else {
3594                                 $ref_item{'age'} = "unknown";
3595                         }
3596                 }
3597
3598                 push @tagslist, \%ref_item;
3599         }
3600         close $fd;
3601
3602         return wantarray ? @tagslist : \@tagslist;
3603 }
3604
3605 ## ----------------------------------------------------------------------
3606 ## filesystem-related functions
3607
3608 sub get_file_owner {
3609         my $path = shift;
3610
3611         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3612         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3613         if (!defined $gcos) {
3614                 return undef;
3615         }
3616         my $owner = $gcos;
3617         $owner =~ s/[,;].*$//;
3618         return to_utf8($owner);
3619 }
3620
3621 # assume that file exists
3622 sub insert_file {
3623         my $filename = shift;
3624
3625         open my $fd, '<', $filename;
3626         print map { to_utf8($_) } <$fd>;
3627         close $fd;
3628 }
3629
3630 ## ......................................................................
3631 ## mimetype related functions
3632
3633 sub mimetype_guess_file {
3634         my $filename = shift;
3635         my $mimemap = shift;
3636         -r $mimemap or return undef;
3637
3638         my %mimemap;
3639         open(my $mh, '<', $mimemap) or return undef;
3640         while (<$mh>) {
3641                 next if m/^#/; # skip comments
3642                 my ($mimetype, @exts) = split(/\s+/);
3643                 foreach my $ext (@exts) {
3644                         $mimemap{$ext} = $mimetype;
3645                 }
3646         }
3647         close($mh);
3648
3649         $filename =~ /\.([^.]*)$/;
3650         return $mimemap{$1};
3651 }
3652
3653 sub mimetype_guess {
3654         my $filename = shift;
3655         my $mime;
3656         $filename =~ /\./ or return undef;
3657
3658         if ($mimetypes_file) {
3659                 my $file = $mimetypes_file;
3660                 if ($file !~ m!^/!) { # if it is relative path
3661                         # it is relative to project
3662                         $file = "$projectroot/$project/$file";
3663                 }
3664                 $mime = mimetype_guess_file($filename, $file);
3665         }
3666         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3667         return $mime;
3668 }
3669
3670 sub blob_mimetype {
3671         my $fd = shift;
3672         my $filename = shift;
3673
3674         if ($filename) {
3675                 my $mime = mimetype_guess($filename);
3676                 $mime and return $mime;
3677         }
3678
3679         # just in case
3680         return $default_blob_plain_mimetype unless $fd;
3681
3682         if (-T $fd) {
3683                 return 'text/plain';
3684         } elsif (! $filename) {
3685                 return 'application/octet-stream';
3686         } elsif ($filename =~ m/\.png$/i) {
3687                 return 'image/png';
3688         } elsif ($filename =~ m/\.gif$/i) {
3689                 return 'image/gif';
3690         } elsif ($filename =~ m/\.jpe?g$/i) {
3691                 return 'image/jpeg';
3692         } else {
3693                 return 'application/octet-stream';
3694         }
3695 }
3696
3697 sub blob_contenttype {
3698         my ($fd, $file_name, $type) = @_;
3699
3700         $type ||= blob_mimetype($fd, $file_name);
3701         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3702                 $type .= "; charset=$default_text_plain_charset";
3703         }
3704
3705         return $type;
3706 }
3707
3708 # guess file syntax for syntax highlighting; return undef if no highlighting
3709 # the name of syntax can (in the future) depend on syntax highlighter used
3710 sub guess_file_syntax {
3711         my ($highlight, $mimetype, $file_name) = @_;
3712         return undef unless ($highlight && defined $file_name);
3713         my $basename = basename($file_name, '.in');
3714         return $highlight_basename{$basename}
3715                 if exists $highlight_basename{$basename};
3716
3717         $basename =~ /\.([^.]*)$/;
3718         my $ext = $1 or return undef;
3719         return $highlight_ext{$ext}
3720                 if exists $highlight_ext{$ext};
3721
3722         return undef;
3723 }
3724
3725 # run highlighter and return FD of its output,
3726 # or return original FD if no highlighting
3727 sub run_highlighter {
3728         my ($fd, $highlight, $syntax) = @_;
3729         return $fd unless ($highlight && defined $syntax);
3730
3731         close $fd;
3732         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3733                   quote_command($highlight_bin).
3734                   " --replace-tabs=8 --fragment --syntax $syntax |"
3735                 or die_error(500, "Couldn't open file or run syntax highlighter");
3736         return $fd;
3737 }
3738
3739 ## ======================================================================
3740 ## functions printing HTML: header, footer, error page
3741
3742 sub get_page_title {
3743         my $title = to_utf8($site_name);
3744
3745         unless (defined $project) {
3746                 if (defined $project_filter) {
3747                         $title .= " - " . to_utf8($project_filter);
3748                 }
3749                 return $title;
3750         }
3751         $title .= " - " . to_utf8($project);
3752
3753         return $title unless (defined $action);
3754         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3755
3756         return $title unless (defined $file_name);
3757         $title .= " - " . esc_path($file_name);
3758         if ($action eq "tree" && $file_name !~ m|/$|) {
3759                 $title .= "/";
3760         }
3761
3762         return $title;
3763 }
3764
3765 sub get_content_type_html {
3766         # require explicit support from the UA if we are to send the page as
3767         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3768         # we have to do this because MSIE sometimes globs '*/*', pretending to
3769         # support xhtml+xml but choking when it gets what it asked for.
3770         if (defined $cgi->http('HTTP_ACCEPT') &&
3771             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3772             $cgi->Accept('application/xhtml+xml') != 0) {
3773                 return 'application/xhtml+xml';
3774         } else {
3775                 return 'text/html';
3776         }
3777 }
3778
3779 sub print_feed_meta {
3780         if (defined $project) {
3781                 my %href_params = get_feed_info();
3782                 if (!exists $href_params{'-title'}) {
3783                         $href_params{'-title'} = 'log';
3784                 }
3785
3786                 foreach my $format (qw(RSS Atom)) {
3787                         my $type = lc($format);
3788                         my %link_attr = (
3789                                 '-rel' => 'alternate',
3790                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3791                                 '-type' => "application/$type+xml"
3792                         );
3793
3794                         $href_params{'action'} = $type;
3795                         $link_attr{'-href'} = href(%href_params);
3796                         print "<link ".
3797                               "rel=\"$link_attr{'-rel'}\" ".
3798                               "title=\"$link_attr{'-title'}\" ".
3799                               "href=\"$link_attr{'-href'}\" ".
3800                               "type=\"$link_attr{'-type'}\" ".
3801                               "/>\n";
3802
3803                         $href_params{'extra_options'} = '--no-merges';
3804                         $link_attr{'-href'} = href(%href_params);
3805                         $link_attr{'-title'} .= ' (no merges)';
3806                         print "<link ".
3807                               "rel=\"$link_attr{'-rel'}\" ".
3808                               "title=\"$link_attr{'-title'}\" ".
3809                               "href=\"$link_attr{'-href'}\" ".
3810                               "type=\"$link_attr{'-type'}\" ".
3811                               "/>\n";
3812                 }
3813
3814         } else {
3815                 printf('<link rel="alternate" title="%s projects list" '.
3816                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3817                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3818                 printf('<link rel="alternate" title="%s projects feeds" '.
3819                        'href="%s" type="text/x-opml" />'."\n",
3820                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3821         }
3822 }
3823
3824 sub print_header_links {
3825         my $status = shift;
3826
3827         # print out each stylesheet that exist, providing backwards capability
3828         # for those people who defined $stylesheet in a config file
3829         if (defined $stylesheet) {
3830                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3831         } else {
3832                 foreach my $stylesheet (@stylesheets) {
3833                         next unless $stylesheet;
3834                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3835                 }
3836         }
3837         print_feed_meta()
3838                 if ($status eq '200 OK');
3839         if (defined $favicon) {
3840                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3841         }
3842 }
3843
3844 sub print_nav_breadcrumbs_path {
3845         my $dirprefix = undef;
3846         while (my $part = shift) {
3847                 $dirprefix .= "/" if defined $dirprefix;
3848                 $dirprefix .= $part;
3849                 print $cgi->a({-href => href(project => undef,
3850                                              project_filter => $dirprefix,
3851                                              action => "project_list")},
3852                               esc_html($part)) . " / ";
3853         }
3854 }
3855
3856 sub print_nav_breadcrumbs {
3857         my %opts = @_;
3858
3859         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3860         if (defined $project) {
3861                 my @dirname = split '/', $project;
3862                 my $projectbasename = pop @dirname;
3863                 print_nav_breadcrumbs_path(@dirname);
3864                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3865                 if (defined $action) {
3866                         my $action_print = $action ;
3867                         if (defined $opts{-action_extra}) {
3868                                 $action_print = $cgi->a({-href => href(action=>$action)},
3869                                         $action);
3870                         }
3871                         print " / $action_print";
3872                 }
3873                 if (defined $opts{-action_extra}) {
3874                         print " / $opts{-action_extra}";
3875                 }
3876                 print "\n";
3877         } elsif (defined $project_filter) {
3878                 print_nav_breadcrumbs_path(split '/', $project_filter);
3879         }
3880 }
3881
3882 sub print_search_form {
3883         if (!defined $searchtext) {
3884                 $searchtext = "";
3885         }
3886         my $search_hash;
3887         if (defined $hash_base) {
3888                 $search_hash = $hash_base;
3889         } elsif (defined $hash) {
3890                 $search_hash = $hash;
3891         } else {
3892                 $search_hash = "HEAD";
3893         }
3894         my $action = $my_uri;
3895         my $use_pathinfo = gitweb_check_feature('pathinfo');
3896         if ($use_pathinfo) {
3897                 $action .= "/".esc_url($project);
3898         }
3899         print $cgi->startform(-method => "get", -action => $action) .
3900               "<div class=\"search\">\n" .
3901               (!$use_pathinfo &&
3902               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3903               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3904               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3905               $cgi->popup_menu(-name => 'st', -default => 'commit',
3906                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3907               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3908               " search:\n",
3909               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
3910               "<span title=\"Extended regular expression\">" .
3911               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3912                              -checked => $search_use_regexp) .
3913               "</span>" .
3914               "</div>" .
3915               $cgi->end_form() . "\n";
3916 }
3917
3918 sub git_header_html {
3919         my $status = shift || "200 OK";
3920         my $expires = shift;
3921         my %opts = @_;
3922
3923         my $title = get_page_title();
3924         my $content_type = get_content_type_html();
3925         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3926                            -status=> $status, -expires => $expires)
3927                 unless ($opts{'-no_http_header'});
3928         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3929         print <<EOF;
3930 <?xml version="1.0" encoding="utf-8"?>
3931 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3932 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3933 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3934 <!-- git core binaries version $git_version -->
3935 <head>
3936 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3937 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3938 <meta name="robots" content="index, nofollow"/>
3939 <title>$title</title>
3940 EOF
3941         # the stylesheet, favicon etc urls won't work correctly with path_info
3942         # unless we set the appropriate base URL
3943         if ($ENV{'PATH_INFO'}) {
3944                 print "<base href=\"".esc_url($base_url)."\" />\n";
3945         }
3946         print_header_links($status);
3947
3948         if (defined $site_html_head_string) {
3949                 print to_utf8($site_html_head_string);
3950         }
3951
3952         print "</head>\n" .
3953               "<body>\n";
3954
3955         if (defined $site_header && -f $site_header) {
3956                 insert_file($site_header);
3957         }
3958
3959         print "<div class=\"page_header\">\n";
3960         if (defined $logo) {
3961                 print $cgi->a({-href => esc_url($logo_url),
3962                                -title => $logo_label},
3963                               $cgi->img({-src => esc_url($logo),
3964                                          -width => 72, -height => 27,
3965                                          -alt => "git",
3966                                          -class => "logo"}));
3967         }
3968         print_nav_breadcrumbs(%opts);
3969         print "</div>\n";
3970
3971         my $have_search = gitweb_check_feature('search');
3972         if (defined $project && $have_search) {
3973                 print_search_form();
3974         }
3975 }
3976
3977 sub git_footer_html {
3978         my $feed_class = 'rss_logo';
3979
3980         print "<div class=\"page_footer\">\n";
3981         if (defined $project) {
3982                 my $descr = git_get_project_description($project);
3983                 if (defined $descr) {
3984                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3985                 }
3986
3987                 my %href_params = get_feed_info();
3988                 if (!%href_params) {
3989                         $feed_class .= ' generic';
3990                 }
3991                 $href_params{'-title'} ||= 'log';
3992
3993                 foreach my $format (qw(RSS Atom)) {
3994                         $href_params{'action'} = lc($format);
3995                         print $cgi->a({-href => href(%href_params),
3996                                       -title => "$href_params{'-title'} $format feed",
3997                                       -class => $feed_class}, $format)."\n";
3998                 }
3999
4000         } else {
4001                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4002                                              project_filter => $project_filter),
4003                               -class => $feed_class}, "OPML") . " ";
4004                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4005                                              project_filter => $project_filter),
4006                               -class => $feed_class}, "TXT") . "\n";
4007         }
4008         print "</div>\n"; # class="page_footer"
4009
4010         if (defined $t0 && gitweb_check_feature('timed')) {
4011                 print "<div id=\"generating_info\">\n";
4012                 print 'This page took '.
4013                       '<span id="generating_time" class="time_span">'.
4014                       tv_interval($t0, [ gettimeofday() ]).
4015                       ' seconds </span>'.
4016                       ' and '.
4017                       '<span id="generating_cmd">'.
4018                       $number_of_git_cmds.
4019                       '</span> git commands '.
4020                       " to generate.\n";
4021                 print "</div>\n"; # class="page_footer"
4022         }
4023
4024         if (defined $site_footer && -f $site_footer) {
4025                 insert_file($site_footer);
4026         }
4027
4028         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4029         if (defined $action &&
4030             $action eq 'blame_incremental') {
4031                 print qq!<script type="text/javascript">\n!.
4032                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4033                       qq!           "!. href() .qq!");\n!.
4034                       qq!</script>\n!;
4035         } else {
4036                 my ($jstimezone, $tz_cookie, $datetime_class) =
4037                         gitweb_get_feature('javascript-timezone');
4038
4039                 print qq!<script type="text/javascript">\n!.
4040                       qq!window.onload = function () {\n!;
4041                 if (gitweb_check_feature('javascript-actions')) {
4042                         print qq!       fixLinks();\n!;
4043                 }
4044                 if ($jstimezone && $tz_cookie && $datetime_class) {
4045                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4046                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4047                 }
4048                 print qq!};\n!.
4049                       qq!</script>\n!;
4050         }
4051
4052         print "</body>\n" .
4053               "</html>";
4054 }
4055
4056 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4057 # Example: die_error(404, 'Hash not found')
4058 # By convention, use the following status codes (as defined in RFC 2616):
4059 # 400: Invalid or missing CGI parameters, or
4060 #      requested object exists but has wrong type.
4061 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4062 #      this server or project.
4063 # 404: Requested object/revision/project doesn't exist.
4064 # 500: The server isn't configured properly, or
4065 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4066 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4067 # 503: The server is currently unavailable (because it is overloaded,
4068 #      or down for maintenance).  Generally, this is a temporary state.
4069 sub die_error {
4070         my $status = shift || 500;
4071         my $error = esc_html(shift) || "Internal Server Error";
4072         my $extra = shift;
4073         my %opts = @_;
4074
4075         my %http_responses = (
4076                 400 => '400 Bad Request',
4077                 403 => '403 Forbidden',
4078                 404 => '404 Not Found',
4079                 500 => '500 Internal Server Error',
4080                 503 => '503 Service Unavailable',
4081         );
4082         git_header_html($http_responses{$status}, undef, %opts);
4083         print <<EOF;
4084 <div class="page_body">
4085 <br /><br />
4086 $status - $error
4087 <br />
4088 EOF
4089         if (defined $extra) {
4090                 print "<hr />\n" .
4091                       "$extra\n";
4092         }
4093         print "</div>\n";
4094
4095         git_footer_html();
4096         goto DONE_GITWEB
4097                 unless ($opts{'-error_handler'});
4098 }
4099
4100 ## ----------------------------------------------------------------------
4101 ## functions printing or outputting HTML: navigation
4102
4103 sub git_print_page_nav {
4104         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4105         $extra = '' if !defined $extra; # pager or formats
4106
4107         my @navs = qw(summary shortlog log commit commitdiff tree);
4108         if ($suppress) {
4109                 @navs = grep { $_ ne $suppress } @navs;
4110         }
4111
4112         my %arg = map { $_ => {action=>$_} } @navs;
4113         if (defined $head) {
4114                 for (qw(commit commitdiff)) {
4115                         $arg{$_}{'hash'} = $head;
4116                 }
4117                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4118                         for (qw(shortlog log)) {
4119                                 $arg{$_}{'hash'} = $head;
4120                         }
4121                 }
4122         }
4123
4124         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4125         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4126
4127         my @actions = gitweb_get_feature('actions');
4128         my %repl = (
4129                 '%' => '%',
4130                 'n' => $project,         # project name
4131                 'f' => $git_dir,         # project path within filesystem
4132                 'h' => $treehead || '',  # current hash ('h' parameter)
4133                 'b' => $treebase || '',  # hash base ('hb' parameter)
4134         );
4135         while (@actions) {
4136                 my ($label, $link, $pos) = splice(@actions,0,3);
4137                 # insert
4138                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4139                 # munch munch
4140                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4141                 $arg{$label}{'_href'} = $link;
4142         }
4143
4144         print "<div class=\"page_nav\">\n" .
4145                 (join " | ",
4146                  map { $_ eq $current ?
4147                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4148                  } @navs);
4149         print "<br/>\n$extra<br/>\n" .
4150               "</div>\n";
4151 }
4152
4153 # returns a submenu for the nagivation of the refs views (tags, heads,
4154 # remotes) with the current view disabled and the remotes view only
4155 # available if the feature is enabled
4156 sub format_ref_views {
4157         my ($current) = @_;
4158         my @ref_views = qw{tags heads};
4159         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4160         return join " | ", map {
4161                 $_ eq $current ? $_ :
4162                 $cgi->a({-href => href(action=>$_)}, $_)
4163         } @ref_views
4164 }
4165
4166 sub format_paging_nav {
4167         my ($action, $page, $has_next_link) = @_;
4168         my $paging_nav;
4169
4170
4171         if ($page > 0) {
4172                 $paging_nav .=
4173                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4174                         " &sdot; " .
4175                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4176                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4177         } else {
4178                 $paging_nav .= "first &sdot; prev";
4179         }
4180
4181         if ($has_next_link) {
4182                 $paging_nav .= " &sdot; " .
4183                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4184                                  -accesskey => "n", -title => "Alt-n"}, "next");
4185         } else {
4186                 $paging_nav .= " &sdot; next";
4187         }
4188
4189         return $paging_nav;
4190 }
4191
4192 ## ......................................................................
4193 ## functions printing or outputting HTML: div
4194
4195 sub git_print_header_div {
4196         my ($action, $title, $hash, $hash_base) = @_;
4197         my %args = ();
4198
4199         $args{'action'} = $action;
4200         $args{'hash'} = $hash if $hash;
4201         $args{'hash_base'} = $hash_base if $hash_base;
4202
4203         print "<div class=\"header\">\n" .
4204               $cgi->a({-href => href(%args), -class => "title"},
4205               $title ? $title : $action) .
4206               "\n</div>\n";
4207 }
4208
4209 sub format_repo_url {
4210         my ($name, $url) = @_;
4211         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4212 }
4213
4214 # Group output by placing it in a DIV element and adding a header.
4215 # Options for start_div() can be provided by passing a hash reference as the
4216 # first parameter to the function.
4217 # Options to git_print_header_div() can be provided by passing an array
4218 # reference. This must follow the options to start_div if they are present.
4219 # The content can be a scalar, which is output as-is, a scalar reference, which
4220 # is output after html escaping, an IO handle passed either as *handle or
4221 # *handle{IO}, or a function reference. In the latter case all following
4222 # parameters will be taken as argument to the content function call.
4223 sub git_print_section {
4224         my ($div_args, $header_args, $content);
4225         my $arg = shift;
4226         if (ref($arg) eq 'HASH') {
4227                 $div_args = $arg;
4228                 $arg = shift;
4229         }
4230         if (ref($arg) eq 'ARRAY') {
4231                 $header_args = $arg;
4232                 $arg = shift;
4233         }
4234         $content = $arg;
4235
4236         print $cgi->start_div($div_args);
4237         git_print_header_div(@$header_args);
4238
4239         if (ref($content) eq 'CODE') {
4240                 $content->(@_);
4241         } elsif (ref($content) eq 'SCALAR') {
4242                 print esc_html($$content);
4243         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4244                 print <$content>;
4245         } elsif (!ref($content) && defined($content)) {
4246                 print $content;
4247         }
4248
4249         print $cgi->end_div;
4250 }
4251
4252 sub format_timestamp_html {
4253         my $date = shift;
4254         my $strtime = $date->{'rfc2822'};
4255
4256         my (undef, undef, $datetime_class) =
4257                 gitweb_get_feature('javascript-timezone');
4258         if ($datetime_class) {
4259                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4260         }
4261
4262         my $localtime_format = '(%02d:%02d %s)';
4263         if ($date->{'hour_local'} < 6) {
4264                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4265         }
4266         $strtime .= ' ' .
4267                     sprintf($localtime_format,
4268                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4269
4270         return $strtime;
4271 }
4272
4273 # Outputs the author name and date in long form
4274 sub git_print_authorship {
4275         my $co = shift;
4276         my %opts = @_;
4277         my $tag = $opts{-tag} || 'div';
4278         my $author = $co->{'author_name'};
4279
4280         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4281         print "<$tag class=\"author_date\">" .
4282               format_search_author($author, "author", esc_html($author)) .
4283               " [".format_timestamp_html(\%ad)."]".
4284               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4285               "</$tag>\n";
4286 }
4287
4288 # Outputs table rows containing the full author or committer information,
4289 # in the format expected for 'commit' view (& similar).
4290 # Parameters are a commit hash reference, followed by the list of people
4291 # to output information for. If the list is empty it defaults to both
4292 # author and committer.
4293 sub git_print_authorship_rows {
4294         my $co = shift;
4295         # too bad we can't use @people = @_ || ('author', 'committer')
4296         my @people = @_;
4297         @people = ('author', 'committer') unless @people;
4298         foreach my $who (@people) {
4299                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4300                 print "<tr><td>$who</td><td>" .
4301                       format_search_author($co->{"${who}_name"}, $who,
4302                                            esc_html($co->{"${who}_name"})) . " " .
4303                       format_search_author($co->{"${who}_email"}, $who,
4304                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4305                       "</td><td rowspan=\"2\">" .
4306                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4307                       "</td></tr>\n" .
4308                       "<tr>" .
4309                       "<td></td><td>" .
4310                       format_timestamp_html(\%wd) .
4311                       "</td>" .
4312                       "</tr>\n";
4313         }
4314 }
4315
4316 sub git_print_page_path {
4317         my $name = shift;
4318         my $type = shift;
4319         my $hb = shift;
4320
4321
4322         print "<div class=\"page_path\">";
4323         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4324                       -title => 'tree root'}, to_utf8("[$project]"));
4325         print " / ";
4326         if (defined $name) {
4327                 my @dirname = split '/', $name;
4328                 my $basename = pop @dirname;
4329                 my $fullname = '';
4330
4331                 foreach my $dir (@dirname) {
4332                         $fullname .= ($fullname ? '/' : '') . $dir;
4333                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4334                                                      hash_base=>$hb),
4335                                       -title => $fullname}, esc_path($dir));
4336                         print " / ";
4337                 }
4338                 if (defined $type && $type eq 'blob') {
4339                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4340                                                      hash_base=>$hb),
4341                                       -title => $name}, esc_path($basename));
4342                 } elsif (defined $type && $type eq 'tree') {
4343                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4344                                                      hash_base=>$hb),
4345                                       -title => $name}, esc_path($basename));
4346                         print " / ";
4347                 } else {
4348                         print esc_path($basename);
4349                 }
4350         }
4351         print "<br/></div>\n";
4352 }
4353
4354 sub git_print_log {
4355         my $log = shift;
4356         my %opts = @_;
4357
4358         if ($opts{'-remove_title'}) {
4359                 # remove title, i.e. first line of log
4360                 shift @$log;
4361         }
4362         # remove leading empty lines
4363         while (defined $log->[0] && $log->[0] eq "") {
4364                 shift @$log;
4365         }
4366
4367         # print log
4368         my $signoff = 0;
4369         my $empty = 0;
4370         foreach my $line (@$log) {
4371                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4372                         $signoff = 1;
4373                         $empty = 0;
4374                         if (! $opts{'-remove_signoff'}) {
4375                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4376                                 next;
4377                         } else {
4378                                 # remove signoff lines
4379                                 next;
4380                         }
4381                 } else {
4382                         $signoff = 0;
4383                 }
4384
4385                 # print only one empty line
4386                 # do not print empty line after signoff
4387                 if ($line eq "") {
4388                         next if ($empty || $signoff);
4389                         $empty = 1;
4390                 } else {
4391                         $empty = 0;
4392                 }
4393
4394                 print format_log_line_html($line) . "<br/>\n";
4395         }
4396
4397         if ($opts{'-final_empty_line'}) {
4398                 # end with single empty line
4399                 print "<br/>\n" unless $empty;
4400         }
4401 }
4402
4403 # return link target (what link points to)
4404 sub git_get_link_target {
4405         my $hash = shift;
4406         my $link_target;
4407
4408         # read link
4409         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4410                 or return;
4411         {
4412                 local $/ = undef;
4413                 $link_target = <$fd>;
4414         }
4415         close $fd
4416                 or return;
4417
4418         return $link_target;
4419 }
4420
4421 # given link target, and the directory (basedir) the link is in,
4422 # return target of link relative to top directory (top tree);
4423 # return undef if it is not possible (including absolute links).
4424 sub normalize_link_target {
4425         my ($link_target, $basedir) = @_;
4426
4427         # absolute symlinks (beginning with '/') cannot be normalized
4428         return if (substr($link_target, 0, 1) eq '/');
4429
4430         # normalize link target to path from top (root) tree (dir)
4431         my $path;
4432         if ($basedir) {
4433                 $path = $basedir . '/' . $link_target;
4434         } else {
4435                 # we are in top (root) tree (dir)
4436                 $path = $link_target;
4437         }
4438
4439         # remove //, /./, and /../
4440         my @path_parts;
4441         foreach my $part (split('/', $path)) {
4442                 # discard '.' and ''
4443                 next if (!$part || $part eq '.');
4444                 # handle '..'
4445                 if ($part eq '..') {
4446                         if (@path_parts) {
4447                                 pop @path_parts;
4448                         } else {
4449                                 # link leads outside repository (outside top dir)
4450                                 return;
4451                         }
4452                 } else {
4453                         push @path_parts, $part;
4454                 }
4455         }
4456         $path = join('/', @path_parts);
4457
4458         return $path;
4459 }
4460
4461 # print tree entry (row of git_tree), but without encompassing <tr> element
4462 sub git_print_tree_entry {
4463         my ($t, $basedir, $hash_base, $have_blame) = @_;
4464
4465         my %base_key = ();
4466         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4467
4468         # The format of a table row is: mode list link.  Where mode is
4469         # the mode of the entry, list is the name of the entry, an href,
4470         # and link is the action links of the entry.
4471
4472         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4473         if (exists $t->{'size'}) {
4474                 print "<td class=\"size\">$t->{'size'}</td>\n";
4475         }
4476         if ($t->{'type'} eq "blob") {
4477                 print "<td class=\"list\">" .
4478                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4479                                                file_name=>"$basedir$t->{'name'}", %base_key),
4480                                 -class => "list"}, esc_path($t->{'name'}));
4481                 if (S_ISLNK(oct $t->{'mode'})) {
4482                         my $link_target = git_get_link_target($t->{'hash'});
4483                         if ($link_target) {
4484                                 my $norm_target = normalize_link_target($link_target, $basedir);
4485                                 if (defined $norm_target) {
4486                                         print " -> " .
4487                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4488                                                                      file_name=>$norm_target),
4489                                                        -title => $norm_target}, esc_path($link_target));
4490                                 } else {
4491                                         print " -> " . esc_path($link_target);
4492                                 }
4493                         }
4494                 }
4495                 print "</td>\n";
4496                 print "<td class=\"link\">";
4497                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4498                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4499                               "blob");
4500                 if ($have_blame) {
4501                         print " | " .
4502                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4503                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4504                                       "blame");
4505                 }
4506                 if (defined $hash_base) {
4507                         print " | " .
4508                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4509                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4510                                       "history");
4511                 }
4512                 print " | " .
4513                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4514                                                file_name=>"$basedir$t->{'name'}")},
4515                                 "raw");
4516                 print "</td>\n";
4517
4518         } elsif ($t->{'type'} eq "tree") {
4519                 print "<td class=\"list\">";
4520                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4521                                              file_name=>"$basedir$t->{'name'}",
4522                                              %base_key)},
4523                               esc_path($t->{'name'}));
4524                 print "</td>\n";
4525                 print "<td class=\"link\">";
4526                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4527                                              file_name=>"$basedir$t->{'name'}",
4528                                              %base_key)},
4529                               "tree");
4530                 if (defined $hash_base) {
4531                         print " | " .
4532                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4533                                                      file_name=>"$basedir$t->{'name'}")},
4534                                       "history");
4535                 }
4536                 print "</td>\n";
4537         } else {
4538                 # unknown object: we can only present history for it
4539                 # (this includes 'commit' object, i.e. submodule support)
4540                 print "<td class=\"list\">" .
4541                       esc_path($t->{'name'}) .
4542                       "</td>\n";
4543                 print "<td class=\"link\">";
4544                 if (defined $hash_base) {
4545                         print $cgi->a({-href => href(action=>"history",
4546                                                      hash_base=>$hash_base,
4547                                                      file_name=>"$basedir$t->{'name'}")},
4548                                       "history");
4549                 }
4550                 print "</td>\n";
4551         }
4552 }
4553
4554 ## ......................................................................
4555 ## functions printing large fragments of HTML
4556
4557 # get pre-image filenames for merge (combined) diff
4558 sub fill_from_file_info {
4559         my ($diff, @parents) = @_;
4560
4561         $diff->{'from_file'} = [ ];
4562         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4563         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4564                 if ($diff->{'status'}[$i] eq 'R' ||
4565                     $diff->{'status'}[$i] eq 'C') {
4566                         $diff->{'from_file'}[$i] =
4567                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4568                 }
4569         }
4570
4571         return $diff;
4572 }
4573
4574 # is current raw difftree line of file deletion
4575 sub is_deleted {
4576         my $diffinfo = shift;
4577
4578         return $diffinfo->{'to_id'} eq ('0' x 40);
4579 }
4580
4581 # does patch correspond to [previous] difftree raw line
4582 # $diffinfo  - hashref of parsed raw diff format
4583 # $patchinfo - hashref of parsed patch diff format
4584 #              (the same keys as in $diffinfo)
4585 sub is_patch_split {
4586         my ($diffinfo, $patchinfo) = @_;
4587
4588         return defined $diffinfo && defined $patchinfo
4589                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4590 }
4591
4592
4593 sub git_difftree_body {
4594         my ($difftree, $hash, @parents) = @_;
4595         my ($parent) = $parents[0];
4596         my $have_blame = gitweb_check_feature('blame');
4597         print "<div class=\"list_head\">\n";
4598         if ($#{$difftree} > 10) {
4599                 print(($#{$difftree} + 1) . " files changed:\n");
4600         }
4601         print "</div>\n";
4602
4603         print "<table class=\"" .
4604               (@parents > 1 ? "combined " : "") .
4605               "diff_tree\">\n";
4606
4607         # header only for combined diff in 'commitdiff' view
4608         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4609         if ($has_header) {
4610                 # table header
4611                 print "<thead><tr>\n" .
4612                        "<th></th><th></th>\n"; # filename, patchN link
4613                 for (my $i = 0; $i < @parents; $i++) {
4614                         my $par = $parents[$i];
4615                         print "<th>" .
4616                               $cgi->a({-href => href(action=>"commitdiff",
4617                                                      hash=>$hash, hash_parent=>$par),
4618                                        -title => 'commitdiff to parent number ' .
4619                                                   ($i+1) . ': ' . substr($par,0,7)},
4620                                       $i+1) .
4621                               "&nbsp;</th>\n";
4622                 }
4623                 print "</tr></thead>\n<tbody>\n";
4624         }
4625
4626         my $alternate = 1;
4627         my $patchno = 0;
4628         foreach my $line (@{$difftree}) {
4629                 my $diff = parsed_difftree_line($line);
4630
4631                 if ($alternate) {
4632                         print "<tr class=\"dark\">\n";
4633                 } else {
4634                         print "<tr class=\"light\">\n";
4635                 }
4636                 $alternate ^= 1;
4637
4638                 if (exists $diff->{'nparents'}) { # combined diff
4639
4640                         fill_from_file_info($diff, @parents)
4641                                 unless exists $diff->{'from_file'};
4642
4643                         if (!is_deleted($diff)) {
4644                                 # file exists in the result (child) commit
4645                                 print "<td>" .
4646                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4647                                                              file_name=>$diff->{'to_file'},
4648                                                              hash_base=>$hash),
4649                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4650                                       "</td>\n";
4651                         } else {
4652                                 print "<td>" .
4653                                       esc_path($diff->{'to_file'}) .
4654                                       "</td>\n";
4655                         }
4656
4657                         if ($action eq 'commitdiff') {
4658                                 # link to patch
4659                                 $patchno++;
4660                                 print "<td class=\"link\">" .
4661                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4662                                               "patch") .
4663                                       " | " .
4664                                       "</td>\n";
4665                         }
4666
4667                         my $has_history = 0;
4668                         my $not_deleted = 0;
4669                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4670                                 my $hash_parent = $parents[$i];
4671                                 my $from_hash = $diff->{'from_id'}[$i];
4672                                 my $from_path = $diff->{'from_file'}[$i];
4673                                 my $status = $diff->{'status'}[$i];
4674
4675                                 $has_history ||= ($status ne 'A');
4676                                 $not_deleted ||= ($status ne 'D');
4677
4678                                 if ($status eq 'A') {
4679                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4680                                 } elsif ($status eq 'D') {
4681                                         print "<td class=\"link\">" .
4682                                               $cgi->a({-href => href(action=>"blob",
4683                                                                      hash_base=>$hash,
4684                                                                      hash=>$from_hash,
4685                                                                      file_name=>$from_path)},
4686                                                       "blob" . ($i+1)) .
4687                                               " | </td>\n";
4688                                 } else {
4689                                         if ($diff->{'to_id'} eq $from_hash) {
4690                                                 print "<td class=\"link nochange\">";
4691                                         } else {
4692                                                 print "<td class=\"link\">";
4693                                         }
4694                                         print $cgi->a({-href => href(action=>"blobdiff",
4695                                                                      hash=>$diff->{'to_id'},
4696                                                                      hash_parent=>$from_hash,
4697                                                                      hash_base=>$hash,
4698                                                                      hash_parent_base=>$hash_parent,
4699                                                                      file_name=>$diff->{'to_file'},
4700                                                                      file_parent=>$from_path)},
4701                                                       "diff" . ($i+1)) .
4702                                               " | </td>\n";
4703                                 }
4704                         }
4705
4706                         print "<td class=\"link\">";
4707                         if ($not_deleted) {
4708                                 print $cgi->a({-href => href(action=>"blob",
4709                                                              hash=>$diff->{'to_id'},
4710                                                              file_name=>$diff->{'to_file'},
4711                                                              hash_base=>$hash)},
4712                                               "blob");
4713                                 print " | " if ($has_history);
4714                         }
4715                         if ($has_history) {
4716                                 print $cgi->a({-href => href(action=>"history",
4717                                                              file_name=>$diff->{'to_file'},
4718                                                              hash_base=>$hash)},
4719                                               "history");
4720                         }
4721                         print "</td>\n";
4722
4723                         print "</tr>\n";
4724                         next; # instead of 'else' clause, to avoid extra indent
4725                 }
4726                 # else ordinary diff
4727
4728                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4729                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4730                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4731                         $to_mode_oct = oct $diff->{'to_mode'};
4732                         if (S_ISREG($to_mode_oct)) { # only for regular file
4733                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4734                         }
4735                         $to_file_type = file_type($diff->{'to_mode'});
4736                 }
4737                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4738                         $from_mode_oct = oct $diff->{'from_mode'};
4739                         if (S_ISREG($from_mode_oct)) { # only for regular file
4740                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4741                         }
4742                         $from_file_type = file_type($diff->{'from_mode'});
4743                 }
4744
4745                 if ($diff->{'status'} eq "A") { # created
4746                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4747                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4748                         $mode_chng   .= "]</span>";
4749                         print "<td>";
4750                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4751                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4752                                       -class => "list"}, esc_path($diff->{'file'}));
4753                         print "</td>\n";
4754                         print "<td>$mode_chng</td>\n";
4755                         print "<td class=\"link\">";
4756                         if ($action eq 'commitdiff') {
4757                                 # link to patch
4758                                 $patchno++;
4759                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4760                                               "patch") .
4761                                       " | ";
4762                         }
4763                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4764                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4765                                       "blob");
4766                         print "</td>\n";
4767
4768                 } elsif ($diff->{'status'} eq "D") { # deleted
4769                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4770                         print "<td>";
4771                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4772                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4773                                        -class => "list"}, esc_path($diff->{'file'}));
4774                         print "</td>\n";
4775                         print "<td>$mode_chng</td>\n";
4776                         print "<td class=\"link\">";
4777                         if ($action eq 'commitdiff') {
4778                                 # link to patch
4779                                 $patchno++;
4780                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4781                                               "patch") .
4782                                       " | ";
4783                         }
4784                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4785                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4786                                       "blob") . " | ";
4787                         if ($have_blame) {
4788                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4789                                                              file_name=>$diff->{'file'})},
4790                                               "blame") . " | ";
4791                         }
4792                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4793                                                      file_name=>$diff->{'file'})},
4794                                       "history");
4795                         print "</td>\n";
4796
4797                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4798                         my $mode_chnge = "";
4799                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4800                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4801                                 if ($from_file_type ne $to_file_type) {
4802                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4803                                 }
4804                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4805                                         if ($from_mode_str && $to_mode_str) {
4806                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4807                                         } elsif ($to_mode_str) {
4808                                                 $mode_chnge .= " mode: $to_mode_str";
4809                                         }
4810                                 }
4811                                 $mode_chnge .= "]</span>\n";
4812                         }
4813                         print "<td>";
4814                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4815                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4816                                       -class => "list"}, esc_path($diff->{'file'}));
4817                         print "</td>\n";
4818                         print "<td>$mode_chnge</td>\n";
4819                         print "<td class=\"link\">";
4820                         if ($action eq 'commitdiff') {
4821                                 # link to patch
4822                                 $patchno++;
4823                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4824                                               "patch") .
4825                                       " | ";
4826                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4827                                 # "commit" view and modified file (not onlu mode changed)
4828                                 print $cgi->a({-href => href(action=>"blobdiff",
4829                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4830                                                              hash_base=>$hash, hash_parent_base=>$parent,
4831                                                              file_name=>$diff->{'file'})},
4832                                               "diff") .
4833                                       " | ";
4834                         }
4835                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4836                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4837                                        "blob") . " | ";
4838                         if ($have_blame) {
4839                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4840                                                              file_name=>$diff->{'file'})},
4841                                               "blame") . " | ";
4842                         }
4843                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4844                                                      file_name=>$diff->{'file'})},
4845                                       "history");
4846                         print "</td>\n";
4847
4848                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4849                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4850                         my $nstatus = $status_name{$diff->{'status'}};
4851                         my $mode_chng = "";
4852                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4853                                 # mode also for directories, so we cannot use $to_mode_str
4854                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4855                         }
4856                         print "<td>" .
4857                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4858                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4859                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4860                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4861                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4862                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4863                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4864                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4865                               "<td class=\"link\">";
4866                         if ($action eq 'commitdiff') {
4867                                 # link to patch
4868                                 $patchno++;
4869                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4870                                               "patch") .
4871                                       " | ";
4872                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4873                                 # "commit" view and modified file (not only pure rename or copy)
4874                                 print $cgi->a({-href => href(action=>"blobdiff",
4875                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4876                                                              hash_base=>$hash, hash_parent_base=>$parent,
4877                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4878                                               "diff") .
4879                                       " | ";
4880                         }
4881                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4882                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4883                                       "blob") . " | ";
4884                         if ($have_blame) {
4885                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4886                                                              file_name=>$diff->{'to_file'})},
4887                                               "blame") . " | ";
4888                         }
4889                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4890                                                     file_name=>$diff->{'to_file'})},
4891                                       "history");
4892                         print "</td>\n";
4893
4894                 } # we should not encounter Unmerged (U) or Unknown (X) status
4895                 print "</tr>\n";
4896         }
4897         print "</tbody>" if $has_header;
4898         print "</table>\n";
4899 }
4900
4901 sub print_sidebyside_diff_chunk {
4902         my @chunk = @_;
4903         my (@ctx, @rem, @add);
4904
4905         return unless @chunk;
4906
4907         # incomplete last line might be among removed or added lines,
4908         # or both, or among context lines: find which
4909         for (my $i = 1; $i < @chunk; $i++) {
4910                 if ($chunk[$i][0] eq 'incomplete') {
4911                         $chunk[$i][0] = $chunk[$i-1][0];
4912                 }
4913         }
4914
4915         # guardian
4916         push @chunk, ["", ""];
4917
4918         foreach my $line_info (@chunk) {
4919                 my ($class, $line) = @$line_info;
4920
4921                 # print chunk headers
4922                 if ($class && $class eq 'chunk_header') {
4923                         print $line;
4924                         next;
4925                 }
4926
4927                 ## print from accumulator when type of class of lines change
4928                 # empty contents block on start rem/add block, or end of chunk
4929                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4930                         print join '',
4931                                 '<div class="chunk_block ctx">',
4932                                         '<div class="old">',
4933                                         @ctx,
4934                                         '</div>',
4935                                         '<div class="new">',
4936                                         @ctx,
4937                                         '</div>',
4938                                 '</div>';
4939                         @ctx = ();
4940                 }
4941                 # empty add/rem block on start context block, or end of chunk
4942                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4943                         if (!@add) {
4944                                 # pure removal
4945                                 print join '',
4946                                         '<div class="chunk_block rem">',
4947                                                 '<div class="old">',
4948                                                 @rem,
4949                                                 '</div>',
4950                                         '</div>';
4951                         } elsif (!@rem) {
4952                                 # pure addition
4953                                 print join '',
4954                                         '<div class="chunk_block add">',
4955                                                 '<div class="new">',
4956                                                 @add,
4957                                                 '</div>',
4958                                         '</div>';
4959                         } else {
4960                                 # assume that it is change
4961                                 print join '',
4962                                         '<div class="chunk_block chg">',
4963                                                 '<div class="old">',
4964                                                 @rem,
4965                                                 '</div>',
4966                                                 '<div class="new">',
4967                                                 @add,
4968                                                 '</div>',
4969                                         '</div>';
4970                         }
4971                         @rem = @add = ();
4972                 }
4973
4974                 ## adding lines to accumulator
4975                 # guardian value
4976                 last unless $line;
4977                 # rem, add or change
4978                 if ($class eq 'rem') {
4979                         push @rem, $line;
4980                 } elsif ($class eq 'add') {
4981                         push @add, $line;
4982                 }
4983                 # context line
4984                 if ($class eq 'ctx') {
4985                         push @ctx, $line;
4986                 }
4987         }
4988 }
4989
4990 sub git_patchset_body {
4991         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4992         my ($hash_parent) = $hash_parents[0];
4993
4994         my $is_combined = (@hash_parents > 1);
4995         my $patch_idx = 0;
4996         my $patch_number = 0;
4997         my $patch_line;
4998         my $diffinfo;
4999         my $to_name;
5000         my (%from, %to);
5001         my @chunk; # for side-by-side diff
5002
5003         print "<div class=\"patchset\">\n";
5004
5005         # skip to first patch
5006         while ($patch_line = <$fd>) {
5007                 chomp $patch_line;
5008
5009                 last if ($patch_line =~ m/^diff /);
5010         }
5011
5012  PATCH:
5013         while ($patch_line) {
5014
5015                 # parse "git diff" header line
5016                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5017                         # $1 is from_name, which we do not use
5018                         $to_name = unquote($2);
5019                         $to_name =~ s!^b/!!;
5020                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5021                         # $1 is 'cc' or 'combined', which we do not use
5022                         $to_name = unquote($2);
5023                 } else {
5024                         $to_name = undef;
5025                 }
5026
5027                 # check if current patch belong to current raw line
5028                 # and parse raw git-diff line if needed
5029                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5030                         # this is continuation of a split patch
5031                         print "<div class=\"patch cont\">\n";
5032                 } else {
5033                         # advance raw git-diff output if needed
5034                         $patch_idx++ if defined $diffinfo;
5035
5036                         # read and prepare patch information
5037                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5038
5039                         # compact combined diff output can have some patches skipped
5040                         # find which patch (using pathname of result) we are at now;
5041                         if ($is_combined) {
5042                                 while ($to_name ne $diffinfo->{'to_file'}) {
5043                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5044                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5045                                               "</div>\n";  # class="patch"
5046
5047                                         $patch_idx++;
5048                                         $patch_number++;
5049
5050                                         last if $patch_idx > $#$difftree;
5051                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5052                                 }
5053                         }
5054
5055                         # modifies %from, %to hashes
5056                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5057
5058                         # this is first patch for raw difftree line with $patch_idx index
5059                         # we index @$difftree array from 0, but number patches from 1
5060                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5061                 }
5062
5063                 # git diff header
5064                 #assert($patch_line =~ m/^diff /) if DEBUG;
5065                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5066                 $patch_number++;
5067                 # print "git diff" header
5068                 print format_git_diff_header_line($patch_line, $diffinfo,
5069                                                   \%from, \%to);
5070
5071                 # print extended diff header
5072                 print "<div class=\"diff extended_header\">\n";
5073         EXTENDED_HEADER:
5074                 while ($patch_line = <$fd>) {
5075                         chomp $patch_line;
5076
5077                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5078
5079                         print format_extended_diff_header_line($patch_line, $diffinfo,
5080                                                                \%from, \%to);
5081                 }
5082                 print "</div>\n"; # class="diff extended_header"
5083
5084                 # from-file/to-file diff header
5085                 if (! $patch_line) {
5086                         print "</div>\n"; # class="patch"
5087                         last PATCH;
5088                 }
5089                 next PATCH if ($patch_line =~ m/^diff /);
5090                 #assert($patch_line =~ m/^---/) if DEBUG;
5091
5092                 my $last_patch_line = $patch_line;
5093                 $patch_line = <$fd>;
5094                 chomp $patch_line;
5095                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5096
5097                 print format_diff_from_to_header($last_patch_line, $patch_line,
5098                                                  $diffinfo, \%from, \%to,
5099                                                  @hash_parents);
5100
5101                 # the patch itself
5102         LINE:
5103                 while ($patch_line = <$fd>) {
5104                         chomp $patch_line;
5105
5106                         next PATCH if ($patch_line =~ m/^diff /);
5107
5108                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5109                         my $diff_classes = "diff";
5110                         $diff_classes .= " $class" if ($class);
5111                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5112
5113                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5114                                 if ($class eq 'chunk_header') {
5115                                         print_sidebyside_diff_chunk(@chunk);
5116                                         @chunk = ( [ $class, $line ] );
5117                                 } else {
5118                                         push @chunk, [ $class, $line ];
5119                                 }
5120                         } else {
5121                                 # default 'inline' style and unknown styles
5122                                 print $line;
5123                         }
5124                 }
5125
5126         } continue {
5127                 if (@chunk) {
5128                         print_sidebyside_diff_chunk(@chunk);
5129                         @chunk = ();
5130                 }
5131                 print "</div>\n"; # class="patch"
5132         }
5133
5134         # for compact combined (--cc) format, with chunk and patch simplification
5135         # the patchset might be empty, but there might be unprocessed raw lines
5136         for (++$patch_idx if $patch_number > 0;
5137              $patch_idx < @$difftree;
5138              ++$patch_idx) {
5139                 # read and prepare patch information
5140                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5141
5142                 # generate anchor for "patch" links in difftree / whatchanged part
5143                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5144                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5145                       "</div>\n";  # class="patch"
5146
5147                 $patch_number++;
5148         }
5149
5150         if ($patch_number == 0) {
5151                 if (@hash_parents > 1) {
5152                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5153                 } else {
5154                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5155                 }
5156         }
5157
5158         print "</div>\n"; # class="patchset"
5159 }
5160
5161 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5162
5163 sub git_project_search_form {
5164         my ($searchtext, $search_use_regexp);
5165
5166         my $limit = '';
5167         if ($project_filter) {
5168                 $limit = " in '$project_filter/'";
5169         }
5170
5171         print "<div class=\"projsearch\">\n";
5172         print $cgi->startform(-method => 'get', -action => $my_uri) .
5173               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5174         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5175                 if (defined $project_filter);
5176         print $cgi->textfield(-name => 's', -value => $searchtext,
5177                               -title => "Search project by name and description$limit",
5178                               -size => 60) . "\n" .
5179               "<span title=\"Extended regular expression\">" .
5180               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5181                              -checked => $search_use_regexp) .
5182               "</span>\n" .
5183               $cgi->submit(-name => 'btnS', -value => 'Search') .
5184               $cgi->end_form() . "\n" .
5185               $cgi->a({-href => href(project => undef, searchtext => undef,
5186                                      project_filter => $project_filter)},
5187                       esc_html("List all projects$limit")) . "<br />\n";
5188         print "</div>\n";
5189 }
5190
5191 # fills project list info (age, description, owner, category, forks)
5192 # for each project in the list, removing invalid projects from
5193 # returned list
5194 # NOTE: modifies $projlist, but does not remove entries from it
5195 sub fill_project_list_info {
5196         my $projlist = shift;
5197         my @projects;
5198
5199         my $show_ctags = gitweb_check_feature('ctags');
5200  PROJECT:
5201         foreach my $pr (@$projlist) {
5202                 my (@activity) = git_get_last_activity($pr->{'path'});
5203                 unless (@activity) {
5204                         next PROJECT;
5205                 }
5206                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5207                 if (!defined $pr->{'descr'}) {
5208                         my $descr = git_get_project_description($pr->{'path'}) || "";
5209                         $descr = to_utf8($descr);
5210                         $pr->{'descr_long'} = $descr;
5211                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5212                 }
5213                 if (!defined $pr->{'owner'}) {
5214                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5215                 }
5216                 if ($show_ctags) {
5217                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5218                 }
5219                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5220                         my $cat = git_get_project_category($pr->{'path'}) ||
5221                                                            $project_list_default_category;
5222                         $pr->{'category'} = to_utf8($cat);
5223                 }
5224
5225                 push @projects, $pr;
5226         }
5227
5228         return @projects;
5229 }
5230
5231 sub sort_projects_list {
5232         my ($projlist, $order) = @_;
5233         my @projects;
5234
5235         my %order_info = (
5236                 project => { key => 'path', type => 'str' },
5237                 descr => { key => 'descr_long', type => 'str' },
5238                 owner => { key => 'owner', type => 'str' },
5239                 age => { key => 'age', type => 'num' }
5240         );
5241         my $oi = $order_info{$order};
5242         return @$projlist unless defined $oi;
5243         if ($oi->{'type'} eq 'str') {
5244                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5245         } else {
5246                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5247         }
5248
5249         return @projects;
5250 }
5251
5252 # returns a hash of categories, containing the list of project
5253 # belonging to each category
5254 sub build_projlist_by_category {
5255         my ($projlist, $from, $to) = @_;
5256         my %categories;
5257
5258         $from = 0 unless defined $from;
5259         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5260
5261         for (my $i = $from; $i <= $to; $i++) {
5262                 my $pr = $projlist->[$i];
5263                 push @{$categories{ $pr->{'category'} }}, $pr;
5264         }
5265
5266         return wantarray ? %categories : \%categories;
5267 }
5268
5269 # print 'sort by' <th> element, generating 'sort by $name' replay link
5270 # if that order is not selected
5271 sub print_sort_th {
5272         print format_sort_th(@_);
5273 }
5274
5275 sub format_sort_th {
5276         my ($name, $order, $header) = @_;
5277         my $sort_th = "";
5278         $header ||= ucfirst($name);
5279
5280         if ($order eq $name) {
5281                 $sort_th .= "<th>$header</th>\n";
5282         } else {
5283                 $sort_th .= "<th>" .
5284                             $cgi->a({-href => href(-replay=>1, order=>$name),
5285                                      -class => "header"}, $header) .
5286                             "</th>\n";
5287         }
5288
5289         return $sort_th;
5290 }
5291
5292 sub git_project_list_rows {
5293         my ($projlist, $from, $to, $check_forks) = @_;
5294
5295         $from = 0 unless defined $from;
5296         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5297
5298         my $alternate = 1;
5299         for (my $i = $from; $i <= $to; $i++) {
5300                 my $pr = $projlist->[$i];
5301
5302                 if ($alternate) {
5303                         print "<tr class=\"dark\">\n";
5304                 } else {
5305                         print "<tr class=\"light\">\n";
5306                 }
5307                 $alternate ^= 1;
5308
5309                 if ($check_forks) {
5310                         print "<td>";
5311                         if ($pr->{'forks'}) {
5312                                 my $nforks = scalar @{$pr->{'forks'}};
5313                                 if ($nforks > 0) {
5314                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5315                                                        -title => "$nforks forks"}, "+");
5316                                 } else {
5317                                         print $cgi->span({-title => "$nforks forks"}, "+");
5318                                 }
5319                         }
5320                         print "</td>\n";
5321                 }
5322                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5323                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5324                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5325                                         -class => "list", -title => $pr->{'descr_long'}},
5326                                         esc_html($pr->{'descr'})) . "</td>\n" .
5327                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5328                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5329                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5330                       "<td class=\"link\">" .
5331                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5332                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5333                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5334                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5335                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5336                       "</td>\n" .
5337                       "</tr>\n";
5338         }
5339 }
5340
5341 sub git_project_list_body {
5342         # actually uses global variable $project
5343         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5344         my @projects = @$projlist;
5345
5346         my $check_forks = gitweb_check_feature('forks');
5347         my $show_ctags  = gitweb_check_feature('ctags');
5348         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5349         $check_forks = undef
5350                 if ($tagfilter || $searchtext);
5351
5352         # filtering out forks before filling info allows to do less work
5353         @projects = filter_forks_from_projects_list(\@projects)
5354                 if ($check_forks);
5355         @projects = fill_project_list_info(\@projects);
5356         # searching projects require filling to be run before it
5357         @projects = search_projects_list(\@projects,
5358                                          'searchtext' => $searchtext,
5359                                          'tagfilter'  => $tagfilter)
5360                 if ($tagfilter || $searchtext);
5361
5362         $order ||= $default_projects_order;
5363         $from = 0 unless defined $from;
5364         $to = $#projects if (!defined $to || $#projects < $to);
5365
5366         # short circuit
5367         if ($from > $to) {
5368                 print "<center>\n".
5369                       "<b>No such projects found</b><br />\n".
5370                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5371                       "</center>\n<br />\n";
5372                 return;
5373         }
5374
5375         @projects = sort_projects_list(\@projects, $order);
5376
5377         if ($show_ctags) {
5378                 my $ctags = git_gather_all_ctags(\@projects);
5379                 my $cloud = git_populate_project_tagcloud($ctags);
5380                 print git_show_project_tagcloud($cloud, 64);
5381         }
5382
5383         print "<table class=\"project_list\">\n";
5384         unless ($no_header) {
5385                 print "<tr>\n";
5386                 if ($check_forks) {
5387                         print "<th></th>\n";
5388                 }
5389                 print_sort_th('project', $order, 'Project');
5390                 print_sort_th('descr', $order, 'Description');
5391                 print_sort_th('owner', $order, 'Owner');
5392                 print_sort_th('age', $order, 'Last Change');
5393                 print "<th></th>\n" . # for links
5394                       "</tr>\n";
5395         }
5396
5397         if ($projects_list_group_categories) {
5398                 # only display categories with projects in the $from-$to window
5399                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5400                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5401                 foreach my $cat (sort keys %categories) {
5402                         unless ($cat eq "") {
5403                                 print "<tr>\n";
5404                                 if ($check_forks) {
5405                                         print "<td></td>\n";
5406                                 }
5407                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5408                                 print "</tr>\n";
5409                         }
5410
5411                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5412                 }
5413         } else {
5414                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5415         }
5416
5417         if (defined $extra) {
5418                 print "<tr>\n";
5419                 if ($check_forks) {
5420                         print "<td></td>\n";
5421                 }
5422                 print "<td colspan=\"5\">$extra</td>\n" .
5423                       "</tr>\n";
5424         }
5425         print "</table>\n";
5426 }
5427
5428 sub git_log_body {
5429         # uses global variable $project
5430         my ($commitlist, $from, $to, $refs, $extra) = @_;
5431
5432         $from = 0 unless defined $from;
5433         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5434
5435         for (my $i = 0; $i <= $to; $i++) {
5436                 my %co = %{$commitlist->[$i]};
5437                 next if !%co;
5438                 my $commit = $co{'id'};
5439                 my $ref = format_ref_marker($refs, $commit);
5440                 git_print_header_div('commit',
5441                                "<span class=\"age\">$co{'age_string'}</span>" .
5442                                esc_html($co{'title'}) . $ref,
5443                                $commit);
5444                 print "<div class=\"title_text\">\n" .
5445                       "<div class=\"log_link\">\n" .
5446                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5447                       " | " .
5448                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5449                       " | " .
5450                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5451                       "<br/>\n" .
5452                       "</div>\n";
5453                       git_print_authorship(\%co, -tag => 'span');
5454                       print "<br/>\n</div>\n";
5455
5456                 print "<div class=\"log_body\">\n";
5457                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5458                 print "</div>\n";
5459         }
5460         if ($extra) {
5461                 print "<div class=\"page_nav\">\n";
5462                 print "$extra\n";
5463                 print "</div>\n";
5464         }
5465 }
5466
5467 sub git_shortlog_body {
5468         # uses global variable $project
5469         my ($commitlist, $from, $to, $refs, $extra) = @_;
5470
5471         $from = 0 unless defined $from;
5472         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5473
5474         print "<table class=\"shortlog\">\n";
5475         my $alternate = 1;
5476         for (my $i = $from; $i <= $to; $i++) {
5477                 my %co = %{$commitlist->[$i]};
5478                 my $commit = $co{'id'};
5479                 my $ref = format_ref_marker($refs, $commit);
5480                 if ($alternate) {
5481                         print "<tr class=\"dark\">\n";
5482                 } else {
5483                         print "<tr class=\"light\">\n";
5484                 }
5485                 $alternate ^= 1;
5486                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5487                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5488                       format_author_html('td', \%co, 10) . "<td>";
5489                 print format_subject_html($co{'title'}, $co{'title_short'},
5490                                           href(action=>"commit", hash=>$commit), $ref);
5491                 print "</td>\n" .
5492                       "<td class=\"link\">" .
5493                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5494                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5495                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5496                 my $snapshot_links = format_snapshot_links($commit);
5497                 if (defined $snapshot_links) {
5498                         print " | " . $snapshot_links;
5499                 }
5500                 print "</td>\n" .
5501                       "</tr>\n";
5502         }
5503         if (defined $extra) {
5504                 print "<tr>\n" .
5505                       "<td colspan=\"4\">$extra</td>\n" .
5506                       "</tr>\n";
5507         }
5508         print "</table>\n";
5509 }
5510
5511 sub git_history_body {
5512         # Warning: assumes constant type (blob or tree) during history
5513         my ($commitlist, $from, $to, $refs, $extra,
5514             $file_name, $file_hash, $ftype) = @_;
5515
5516         $from = 0 unless defined $from;
5517         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5518
5519         print "<table class=\"history\">\n";
5520         my $alternate = 1;
5521         for (my $i = $from; $i <= $to; $i++) {
5522                 my %co = %{$commitlist->[$i]};
5523                 if (!%co) {
5524                         next;
5525                 }
5526                 my $commit = $co{'id'};
5527
5528                 my $ref = format_ref_marker($refs, $commit);
5529
5530                 if ($alternate) {
5531                         print "<tr class=\"dark\">\n";
5532                 } else {
5533                         print "<tr class=\"light\">\n";
5534                 }
5535                 $alternate ^= 1;
5536                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5537         # shortlog:   format_author_html('td', \%co, 10)
5538                       format_author_html('td', \%co, 15, 3) . "<td>";
5539                 # originally git_history used chop_str($co{'title'}, 50)
5540                 print format_subject_html($co{'title'}, $co{'title_short'},
5541                                           href(action=>"commit", hash=>$commit), $ref);
5542                 print "</td>\n" .
5543                       "<td class=\"link\">" .
5544                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5545                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5546
5547                 if ($ftype eq 'blob') {
5548                         my $blob_current = $file_hash;
5549                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5550                         if (defined $blob_current && defined $blob_parent &&
5551                                         $blob_current ne $blob_parent) {
5552                                 print " | " .
5553                                         $cgi->a({-href => href(action=>"blobdiff",
5554                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5555                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5556                                                                file_name=>$file_name)},
5557                                                 "diff to current");
5558                         }
5559                 }
5560                 print "</td>\n" .
5561                       "</tr>\n";
5562         }
5563         if (defined $extra) {
5564                 print "<tr>\n" .
5565                       "<td colspan=\"4\">$extra</td>\n" .
5566                       "</tr>\n";
5567         }
5568         print "</table>\n";
5569 }
5570
5571 sub git_tags_body {
5572         # uses global variable $project
5573         my ($taglist, $from, $to, $extra) = @_;
5574         $from = 0 unless defined $from;
5575         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5576
5577         print "<table class=\"tags\">\n";
5578         my $alternate = 1;
5579         for (my $i = $from; $i <= $to; $i++) {
5580                 my $entry = $taglist->[$i];
5581                 my %tag = %$entry;
5582                 my $comment = $tag{'subject'};
5583                 my $comment_short;
5584                 if (defined $comment) {
5585                         $comment_short = chop_str($comment, 30, 5);
5586                 }
5587                 if ($alternate) {
5588                         print "<tr class=\"dark\">\n";
5589                 } else {
5590                         print "<tr class=\"light\">\n";
5591                 }
5592                 $alternate ^= 1;
5593                 if (defined $tag{'age'}) {
5594                         print "<td><i>$tag{'age'}</i></td>\n";
5595                 } else {
5596                         print "<td></td>\n";
5597                 }
5598                 print "<td>" .
5599                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5600                                -class => "list name"}, esc_html($tag{'name'})) .
5601                       "</td>\n" .
5602                       "<td>";
5603                 if (defined $comment) {
5604                         print format_subject_html($comment, $comment_short,
5605                                                   href(action=>"tag", hash=>$tag{'id'}));
5606                 }
5607                 print "</td>\n" .
5608                       "<td class=\"selflink\">";
5609                 if ($tag{'type'} eq "tag") {
5610                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5611                 } else {
5612                         print "&nbsp;";
5613                 }
5614                 print "</td>\n" .
5615                       "<td class=\"link\">" . " | " .
5616                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5617                 if ($tag{'reftype'} eq "commit") {
5618                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5619                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5620                 } elsif ($tag{'reftype'} eq "blob") {
5621                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5622                 }
5623                 print "</td>\n" .
5624                       "</tr>";
5625         }
5626         if (defined $extra) {
5627                 print "<tr>\n" .
5628                       "<td colspan=\"5\">$extra</td>\n" .
5629                       "</tr>\n";
5630         }
5631         print "</table>\n";
5632 }
5633
5634 sub git_heads_body {
5635         # uses global variable $project
5636         my ($headlist, $head, $from, $to, $extra) = @_;
5637         $from = 0 unless defined $from;
5638         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5639
5640         print "<table class=\"heads\">\n";
5641         my $alternate = 1;
5642         for (my $i = $from; $i <= $to; $i++) {
5643                 my $entry = $headlist->[$i];
5644                 my %ref = %$entry;
5645                 my $curr = $ref{'id'} eq $head;
5646                 if ($alternate) {
5647                         print "<tr class=\"dark\">\n";
5648                 } else {
5649                         print "<tr class=\"light\">\n";
5650                 }
5651                 $alternate ^= 1;
5652                 print "<td><i>$ref{'age'}</i></td>\n" .
5653                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5654                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5655                                -class => "list name"},esc_html($ref{'name'})) .
5656                       "</td>\n" .
5657                       "<td class=\"link\">" .
5658                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5659                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5660                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5661                       "</td>\n" .
5662                       "</tr>";
5663         }
5664         if (defined $extra) {
5665                 print "<tr>\n" .
5666                       "<td colspan=\"3\">$extra</td>\n" .
5667                       "</tr>\n";
5668         }
5669         print "</table>\n";
5670 }
5671
5672 # Display a single remote block
5673 sub git_remote_block {
5674         my ($remote, $rdata, $limit, $head) = @_;
5675
5676         my $heads = $rdata->{'heads'};
5677         my $fetch = $rdata->{'fetch'};
5678         my $push = $rdata->{'push'};
5679
5680         my $urls_table = "<table class=\"projects_list\">\n" ;
5681
5682         if (defined $fetch) {
5683                 if ($fetch eq $push) {
5684                         $urls_table .= format_repo_url("URL", $fetch);
5685                 } else {
5686                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5687                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5688                 }
5689         } elsif (defined $push) {
5690                 $urls_table .= format_repo_url("Push URL", $push);
5691         } else {
5692                 $urls_table .= format_repo_url("", "No remote URL");
5693         }
5694
5695         $urls_table .= "</table>\n";
5696
5697         my $dots;
5698         if (defined $limit && $limit < @$heads) {
5699                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5700         }
5701
5702         print $urls_table;
5703         git_heads_body($heads, $head, 0, $limit, $dots);
5704 }
5705
5706 # Display a list of remote names with the respective fetch and push URLs
5707 sub git_remotes_list {
5708         my ($remotedata, $limit) = @_;
5709         print "<table class=\"heads\">\n";
5710         my $alternate = 1;
5711         my @remotes = sort keys %$remotedata;
5712
5713         my $limited = $limit && $limit < @remotes;
5714
5715         $#remotes = $limit - 1 if $limited;
5716
5717         while (my $remote = shift @remotes) {
5718                 my $rdata = $remotedata->{$remote};
5719                 my $fetch = $rdata->{'fetch'};
5720                 my $push = $rdata->{'push'};
5721                 if ($alternate) {
5722                         print "<tr class=\"dark\">\n";
5723                 } else {
5724                         print "<tr class=\"light\">\n";
5725                 }
5726                 $alternate ^= 1;
5727                 print "<td>" .
5728                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5729                                -class=> "list name"},esc_html($remote)) .
5730                       "</td>";
5731                 print "<td class=\"link\">" .
5732                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5733                       " | " .
5734                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5735                       "</td>";
5736
5737                 print "</tr>\n";
5738         }
5739
5740         if ($limited) {
5741                 print "<tr>\n" .
5742                       "<td colspan=\"3\">" .
5743                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5744                       "</td>\n" . "</tr>\n";
5745         }
5746
5747         print "</table>";
5748 }
5749
5750 # Display remote heads grouped by remote, unless there are too many
5751 # remotes, in which case we only display the remote names
5752 sub git_remotes_body {
5753         my ($remotedata, $limit, $head) = @_;
5754         if ($limit and $limit < keys %$remotedata) {
5755                 git_remotes_list($remotedata, $limit);
5756         } else {
5757                 fill_remote_heads($remotedata);
5758                 while (my ($remote, $rdata) = each %$remotedata) {
5759                         git_print_section({-class=>"remote", -id=>$remote},
5760                                 ["remotes", $remote, $remote], sub {
5761                                         git_remote_block($remote, $rdata, $limit, $head);
5762                                 });
5763                 }
5764         }
5765 }
5766
5767 sub git_search_message {
5768         my %co = @_;
5769
5770         my $greptype;
5771         if ($searchtype eq 'commit') {
5772                 $greptype = "--grep=";
5773         } elsif ($searchtype eq 'author') {
5774                 $greptype = "--author=";
5775         } elsif ($searchtype eq 'committer') {
5776                 $greptype = "--committer=";
5777         }
5778         $greptype .= $searchtext;
5779         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5780                                        $greptype, '--regexp-ignore-case',
5781                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5782
5783         my $paging_nav = '';
5784         if ($page > 0) {
5785                 $paging_nav .=
5786                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5787                                 "first") .
5788                         " &sdot; " .
5789                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5790                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5791         } else {
5792                 $paging_nav .= "first &sdot; prev";
5793         }
5794         my $next_link = '';
5795         if ($#commitlist >= 100) {
5796                 $next_link =
5797                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5798                                  -accesskey => "n", -title => "Alt-n"}, "next");
5799                 $paging_nav .= " &sdot; $next_link";
5800         } else {
5801                 $paging_nav .= " &sdot; next";
5802         }
5803
5804         git_header_html();
5805
5806         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5807         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5808         if ($page == 0 && !@commitlist) {
5809                 print "<p>No match.</p>\n";
5810         } else {
5811                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5812         }
5813
5814         git_footer_html();
5815 }
5816
5817 sub git_search_changes {
5818         my %co = @_;
5819
5820         local $/ = "\n";
5821         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5822                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5823                 ($search_use_regexp ? '--pickaxe-regex' : ())
5824                         or die_error(500, "Open git-log failed");
5825
5826         git_header_html();
5827
5828         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5829         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5830
5831         print "<table class=\"pickaxe search\">\n";
5832         my $alternate = 1;
5833         undef %co;
5834         my @files;
5835         while (my $line = <$fd>) {
5836                 chomp $line;
5837                 next unless $line;
5838
5839                 my %set = parse_difftree_raw_line($line);
5840                 if (defined $set{'commit'}) {
5841                         # finish previous commit
5842                         if (%co) {
5843                                 print "</td>\n" .
5844                                       "<td class=\"link\">" .
5845                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5846                                               "commit") .
5847                                       " | " .
5848                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5849                                                              hash_base=>$co{'id'})},
5850                                               "tree") .
5851                                       "</td>\n" .
5852                                       "</tr>\n";
5853                         }
5854
5855                         if ($alternate) {
5856                                 print "<tr class=\"dark\">\n";
5857                         } else {
5858                                 print "<tr class=\"light\">\n";
5859                         }
5860                         $alternate ^= 1;
5861                         %co = parse_commit($set{'commit'});
5862                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5863                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5864                               "<td><i>$author</i></td>\n" .
5865                               "<td>" .
5866                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5867                                       -class => "list subject"},
5868                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5869                 } elsif (defined $set{'to_id'}) {
5870                         next if ($set{'to_id'} =~ m/^0{40}$/);
5871
5872                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5873                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5874                                       -class => "list"},
5875                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5876                               "<br/>\n";
5877                 }
5878         }
5879         close $fd;
5880
5881         # finish last commit (warning: repetition!)
5882         if (%co) {
5883                 print "</td>\n" .
5884                       "<td class=\"link\">" .
5885                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5886                               "commit") .
5887                       " | " .
5888                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5889                                              hash_base=>$co{'id'})},
5890                               "tree") .
5891                       "</td>\n" .
5892                       "</tr>\n";
5893         }
5894
5895         print "</table>\n";
5896
5897         git_footer_html();
5898 }
5899
5900 sub git_search_files {
5901         my %co = @_;
5902
5903         local $/ = "\n";
5904         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5905                 $search_use_regexp ? ('-E', '-i') : '-F',
5906                 $searchtext, $co{'tree'}
5907                         or die_error(500, "Open git-grep failed");
5908
5909         git_header_html();
5910
5911         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5912         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5913
5914         print "<table class=\"grep_search\">\n";
5915         my $alternate = 1;
5916         my $matches = 0;
5917         my $lastfile = '';
5918         while (my $line = <$fd>) {
5919                 chomp $line;
5920                 my ($file, $file_href, $lno, $ltext, $binary);
5921                 last if ($matches++ > 1000);
5922                 if ($line =~ /^Binary file (.+) matches$/) {
5923                         $file = $1;
5924                         $binary = 1;
5925                 } else {
5926                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5927                         $file =~ s/^$co{'tree'}://;
5928                 }
5929                 if ($file ne $lastfile) {
5930                         $lastfile and print "</td></tr>\n";
5931                         if ($alternate++) {
5932                                 print "<tr class=\"dark\">\n";
5933                         } else {
5934                                 print "<tr class=\"light\">\n";
5935                         }
5936                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5937                                           file_name=>$file);
5938                         print "<td class=\"list\">".
5939                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5940                         print "</td><td>\n";
5941                         $lastfile = $file;
5942                 }
5943                 if ($binary) {
5944                         print "<div class=\"binary\">Binary file</div>\n";
5945                 } else {
5946                         $ltext = untabify($ltext);
5947                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5948                                 $ltext = esc_html($1, -nbsp=>1);
5949                                 $ltext .= '<span class="match">';
5950                                 $ltext .= esc_html($2, -nbsp=>1);
5951                                 $ltext .= '</span>';
5952                                 $ltext .= esc_html($3, -nbsp=>1);
5953                         } else {
5954                                 $ltext = esc_html($ltext, -nbsp=>1);
5955                         }
5956                         print "<div class=\"pre\">" .
5957                                 $cgi->a({-href => $file_href.'#l'.$lno,
5958                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5959                                 ' ' .  $ltext . "</div>\n";
5960                 }
5961         }
5962         if ($lastfile) {
5963                 print "</td></tr>\n";
5964                 if ($matches > 1000) {
5965                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5966                 }
5967         } else {
5968                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5969         }
5970         close $fd;
5971
5972         print "</table>\n";
5973
5974         git_footer_html();
5975 }
5976
5977 sub git_search_grep_body {
5978         my ($commitlist, $from, $to, $extra) = @_;
5979         $from = 0 unless defined $from;
5980         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5981
5982         print "<table class=\"commit_search\">\n";
5983         my $alternate = 1;
5984         for (my $i = $from; $i <= $to; $i++) {
5985                 my %co = %{$commitlist->[$i]};
5986                 if (!%co) {
5987                         next;
5988                 }
5989                 my $commit = $co{'id'};
5990                 if ($alternate) {
5991                         print "<tr class=\"dark\">\n";
5992                 } else {
5993                         print "<tr class=\"light\">\n";
5994                 }
5995                 $alternate ^= 1;
5996                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5997                       format_author_html('td', \%co, 15, 5) .
5998                       "<td>" .
5999                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6000                                -class => "list subject"},
6001                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6002                 my $comment = $co{'comment'};
6003                 foreach my $line (@$comment) {
6004                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6005                                 my ($lead, $match, $trail) = ($1, $2, $3);
6006                                 $match = chop_str($match, 70, 5, 'center');
6007                                 my $contextlen = int((80 - length($match))/2);
6008                                 $contextlen = 30 if ($contextlen > 30);
6009                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6010                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6011
6012                                 $lead  = esc_html($lead);
6013                                 $match = esc_html($match);
6014                                 $trail = esc_html($trail);
6015
6016                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6017                         }
6018                 }
6019                 print "</td>\n" .
6020                       "<td class=\"link\">" .
6021                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6022                       " | " .
6023                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6024                       " | " .
6025                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6026                 print "</td>\n" .
6027                       "</tr>\n";
6028         }
6029         if (defined $extra) {
6030                 print "<tr>\n" .
6031                       "<td colspan=\"3\">$extra</td>\n" .
6032                       "</tr>\n";
6033         }
6034         print "</table>\n";
6035 }
6036
6037 ## ======================================================================
6038 ## ======================================================================
6039 ## actions
6040
6041 sub git_project_list {
6042         my $order = $input_params{'order'};
6043         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6044                 die_error(400, "Unknown order parameter");
6045         }
6046
6047         my @list = git_get_projects_list($project_filter, $strict_export);
6048         if (!@list) {
6049                 die_error(404, "No projects found");
6050         }
6051
6052         git_header_html();
6053         if (defined $home_text && -f $home_text) {
6054                 print "<div class=\"index_include\">\n";
6055                 insert_file($home_text);
6056                 print "</div>\n";
6057         }
6058
6059         git_project_search_form($searchtext, $search_use_regexp);
6060         git_project_list_body(\@list, $order);
6061         git_footer_html();
6062 }
6063
6064 sub git_forks {
6065         my $order = $input_params{'order'};
6066         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6067                 die_error(400, "Unknown order parameter");
6068         }
6069
6070         my $filter = $project;
6071         $filter =~ s/\.git$//;
6072         my @list = git_get_projects_list($filter);
6073         if (!@list) {
6074                 die_error(404, "No forks found");
6075         }
6076
6077         git_header_html();
6078         git_print_page_nav('','');
6079         git_print_header_div('summary', "$project forks");
6080         git_project_list_body(\@list, $order);
6081         git_footer_html();
6082 }
6083
6084 sub git_project_index {
6085         my @projects = git_get_projects_list($project_filter, $strict_export);
6086         if (!@projects) {
6087                 die_error(404, "No projects found");
6088         }
6089
6090         print $cgi->header(
6091                 -type => 'text/plain',
6092                 -charset => 'utf-8',
6093                 -content_disposition => 'inline; filename="index.aux"');
6094
6095         foreach my $pr (@projects) {
6096                 if (!exists $pr->{'owner'}) {
6097                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6098                 }
6099
6100                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6101                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6102                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6103                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6104                 $path  =~ s/ /\+/g;
6105                 $owner =~ s/ /\+/g;
6106
6107                 print "$path $owner\n";
6108         }
6109 }
6110
6111 sub git_summary {
6112         my $descr = git_get_project_description($project) || "none";
6113         my %co = parse_commit("HEAD");
6114         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6115         my $head = $co{'id'};
6116         my $remote_heads = gitweb_check_feature('remote_heads');
6117
6118         my $owner = git_get_project_owner($project);
6119
6120         my $refs = git_get_references();
6121         # These get_*_list functions return one more to allow us to see if
6122         # there are more ...
6123         my @taglist  = git_get_tags_list(16);
6124         my @headlist = git_get_heads_list(16);
6125         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6126         my @forklist;
6127         my $check_forks = gitweb_check_feature('forks');
6128
6129         if ($check_forks) {
6130                 # find forks of a project
6131                 my $filter = $project;
6132                 $filter =~ s/\.git$//;
6133                 @forklist = git_get_projects_list($filter);
6134                 # filter out forks of forks
6135                 @forklist = filter_forks_from_projects_list(\@forklist)
6136                         if (@forklist);
6137         }
6138
6139         git_header_html();
6140         git_print_page_nav('summary','', $head);
6141
6142         print "<div class=\"title\">&nbsp;</div>\n";
6143         print "<table class=\"projects_list\">\n" .
6144               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6145               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6146         if (defined $cd{'rfc2822'}) {
6147                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6148                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6149         }
6150
6151         # use per project git URL list in $projectroot/$project/cloneurl
6152         # or make project git URL from git base URL and project name
6153         my $url_tag = "URL";
6154         my @url_list = git_get_project_url_list($project);
6155         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6156         foreach my $git_url (@url_list) {
6157                 next unless $git_url;
6158                 print format_repo_url($url_tag, $git_url);
6159                 $url_tag = "";
6160         }
6161
6162         # Tag cloud
6163         my $show_ctags = gitweb_check_feature('ctags');
6164         if ($show_ctags) {
6165                 my $ctags = git_get_project_ctags($project);
6166                 if (%$ctags) {
6167                         # without ability to add tags, don't show if there are none
6168                         my $cloud = git_populate_project_tagcloud($ctags);
6169                         print "<tr id=\"metadata_ctags\">" .
6170                               "<td>content tags</td>" .
6171                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6172                               "</tr>\n";
6173                 }
6174         }
6175
6176         print "</table>\n";
6177
6178         # If XSS prevention is on, we don't include README.html.
6179         # TODO: Allow a readme in some safe format.
6180         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6181                 print "<div class=\"title\">readme</div>\n" .
6182                       "<div class=\"readme\">\n";
6183                 insert_file("$projectroot/$project/README.html");
6184                 print "\n</div>\n"; # class="readme"
6185         }
6186
6187         # we need to request one more than 16 (0..15) to check if
6188         # those 16 are all
6189         my @commitlist = $head ? parse_commits($head, 17) : ();
6190         if (@commitlist) {
6191                 git_print_header_div('shortlog');
6192                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6193                                   $#commitlist <=  15 ? undef :
6194                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6195         }
6196
6197         if (@taglist) {
6198                 git_print_header_div('tags');
6199                 git_tags_body(\@taglist, 0, 15,
6200                               $#taglist <=  15 ? undef :
6201                               $cgi->a({-href => href(action=>"tags")}, "..."));
6202         }
6203
6204         if (@headlist) {
6205                 git_print_header_div('heads');
6206                 git_heads_body(\@headlist, $head, 0, 15,
6207                                $#headlist <= 15 ? undef :
6208                                $cgi->a({-href => href(action=>"heads")}, "..."));
6209         }
6210
6211         if (%remotedata) {
6212                 git_print_header_div('remotes');
6213                 git_remotes_body(\%remotedata, 15, $head);
6214         }
6215
6216         if (@forklist) {
6217                 git_print_header_div('forks');
6218                 git_project_list_body(\@forklist, 'age', 0, 15,
6219                                       $#forklist <= 15 ? undef :
6220                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6221                                       'no_header');
6222         }
6223
6224         git_footer_html();
6225 }
6226
6227 sub git_tag {
6228         my %tag = parse_tag($hash);
6229
6230         if (! %tag) {
6231                 die_error(404, "Unknown tag object");
6232         }
6233
6234         my $head = git_get_head_hash($project);
6235         git_header_html();
6236         git_print_page_nav('','', $head,undef,$head);
6237         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6238         print "<div class=\"title_text\">\n" .
6239               "<table class=\"object_header\">\n" .
6240               "<tr>\n" .
6241               "<td>object</td>\n" .
6242               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6243                                $tag{'object'}) . "</td>\n" .
6244               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6245                                               $tag{'type'}) . "</td>\n" .
6246               "</tr>\n";
6247         if (defined($tag{'author'})) {
6248                 git_print_authorship_rows(\%tag, 'author');
6249         }
6250         print "</table>\n\n" .
6251               "</div>\n";
6252         print "<div class=\"page_body\">";
6253         my $comment = $tag{'comment'};
6254         foreach my $line (@$comment) {
6255                 chomp $line;
6256                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6257         }
6258         print "</div>\n";
6259         git_footer_html();
6260 }
6261
6262 sub git_blame_common {
6263         my $format = shift || 'porcelain';
6264         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6265                 $format = 'incremental';
6266                 $action = 'blame_incremental'; # for page title etc
6267         }
6268
6269         # permissions
6270         gitweb_check_feature('blame')
6271                 or die_error(403, "Blame view not allowed");
6272
6273         # error checking
6274         die_error(400, "No file name given") unless $file_name;
6275         $hash_base ||= git_get_head_hash($project);
6276         die_error(404, "Couldn't find base commit") unless $hash_base;
6277         my %co = parse_commit($hash_base)
6278                 or die_error(404, "Commit not found");
6279         my $ftype = "blob";
6280         if (!defined $hash) {
6281                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6282                         or die_error(404, "Error looking up file");
6283         } else {
6284                 $ftype = git_get_type($hash);
6285                 if ($ftype !~ "blob") {
6286                         die_error(400, "Object is not a blob");
6287                 }
6288         }
6289
6290         my $fd;
6291         if ($format eq 'incremental') {
6292                 # get file contents (as base)
6293                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6294                         or die_error(500, "Open git-cat-file failed");
6295         } elsif ($format eq 'data') {
6296                 # run git-blame --incremental
6297                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6298                         $hash_base, "--", $file_name
6299                         or die_error(500, "Open git-blame --incremental failed");
6300         } else {
6301                 # run git-blame --porcelain
6302                 open $fd, "-|", git_cmd(), "blame", '-p',
6303                         $hash_base, '--', $file_name
6304                         or die_error(500, "Open git-blame --porcelain failed");
6305         }
6306
6307         # incremental blame data returns early
6308         if ($format eq 'data') {
6309                 print $cgi->header(
6310                         -type=>"text/plain", -charset => "utf-8",
6311                         -status=> "200 OK");
6312                 local $| = 1; # output autoflush
6313                 while (my $line = <$fd>) {
6314                         print to_utf8($line);
6315                 }
6316                 close $fd
6317                         or print "ERROR $!\n";
6318
6319                 print 'END';
6320                 if (defined $t0 && gitweb_check_feature('timed')) {
6321                         print ' '.
6322                               tv_interval($t0, [ gettimeofday() ]).
6323                               ' '.$number_of_git_cmds;
6324                 }
6325                 print "\n";
6326
6327                 return;
6328         }
6329
6330         # page header
6331         git_header_html();
6332         my $formats_nav =
6333                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6334                         "blob") .
6335                 " | ";
6336         if ($format eq 'incremental') {
6337                 $formats_nav .=
6338                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6339                                 "blame") . " (non-incremental)";
6340         } else {
6341                 $formats_nav .=
6342                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6343                                 "blame") . " (incremental)";
6344         }
6345         $formats_nav .=
6346                 " | " .
6347                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6348                         "history") .
6349                 " | " .
6350                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6351                         "HEAD");
6352         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6353         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6354         git_print_page_path($file_name, $ftype, $hash_base);
6355
6356         # page body
6357         if ($format eq 'incremental') {
6358                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6359                       "This page requires JavaScript to run.\n Use ".
6360                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6361                               'this page').
6362                       " instead.\n".
6363                       "</b></center></div>\n</noscript>\n";
6364
6365                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6366         }
6367
6368         print qq!<div class="page_body">\n!;
6369         print qq!<div id="progress_info">... / ...</div>\n!
6370                 if ($format eq 'incremental');
6371         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6372               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6373               qq!<thead>\n!.
6374               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6375               qq!</thead>\n!.
6376               qq!<tbody>\n!;
6377
6378         my @rev_color = qw(light dark);
6379         my $num_colors = scalar(@rev_color);
6380         my $current_color = 0;
6381
6382         if ($format eq 'incremental') {
6383                 my $color_class = $rev_color[$current_color];
6384
6385                 #contents of a file
6386                 my $linenr = 0;
6387         LINE:
6388                 while (my $line = <$fd>) {
6389                         chomp $line;
6390                         $linenr++;
6391
6392                         print qq!<tr id="l$linenr" class="$color_class">!.
6393                               qq!<td class="sha1"><a href=""> </a></td>!.
6394                               qq!<td class="linenr">!.
6395                               qq!<a class="linenr" href="">$linenr</a></td>!;
6396                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6397                         print qq!</tr>\n!;
6398                 }
6399
6400         } else { # porcelain, i.e. ordinary blame
6401                 my %metainfo = (); # saves information about commits
6402
6403                 # blame data
6404         LINE:
6405                 while (my $line = <$fd>) {
6406                         chomp $line;
6407                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6408                         # no <lines in group> for subsequent lines in group of lines
6409                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6410                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6411                         if (!exists $metainfo{$full_rev}) {
6412                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6413                         }
6414                         my $meta = $metainfo{$full_rev};
6415                         my $data;
6416                         while ($data = <$fd>) {
6417                                 chomp $data;
6418                                 last if ($data =~ s/^\t//); # contents of line
6419                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6420                                         $meta->{$1} = $2 unless exists $meta->{$1};
6421                                 }
6422                                 if ($data =~ /^previous /) {
6423                                         $meta->{'nprevious'}++;
6424                                 }
6425                         }
6426                         my $short_rev = substr($full_rev, 0, 8);
6427                         my $author = $meta->{'author'};
6428                         my %date =
6429                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6430                         my $date = $date{'iso-tz'};
6431                         if ($group_size) {
6432                                 $current_color = ($current_color + 1) % $num_colors;
6433                         }
6434                         my $tr_class = $rev_color[$current_color];
6435                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6436                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6437                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6438                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6439                         if ($group_size) {
6440                                 print "<td class=\"sha1\"";
6441                                 print " title=\"". esc_html($author) . ", $date\"";
6442                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6443                                 print ">";
6444                                 print $cgi->a({-href => href(action=>"commit",
6445                                                              hash=>$full_rev,
6446                                                              file_name=>$file_name)},
6447                                               esc_html($short_rev));
6448                                 if ($group_size >= 2) {
6449                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6450                                         if (@author_initials) {
6451                                                 print "<br />" .
6452                                                       esc_html(join('', @author_initials));
6453                                                 #           or join('.', ...)
6454                                         }
6455                                 }
6456                                 print "</td>\n";
6457                         }
6458                         # 'previous' <sha1 of parent commit> <filename at commit>
6459                         if (exists $meta->{'previous'} &&
6460                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6461                                 $meta->{'parent'} = $1;
6462                                 $meta->{'file_parent'} = unquote($2);
6463                         }
6464                         my $linenr_commit =
6465                                 exists($meta->{'parent'}) ?
6466                                 $meta->{'parent'} : $full_rev;
6467                         my $linenr_filename =
6468                                 exists($meta->{'file_parent'}) ?
6469                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6470                         my $blamed = href(action => 'blame',
6471                                           file_name => $linenr_filename,
6472                                           hash_base => $linenr_commit);
6473                         print "<td class=\"linenr\">";
6474                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6475                                         -class => "linenr" },
6476                                       esc_html($lineno));
6477                         print "</td>";
6478                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6479                         print "</tr>\n";
6480                 } # end while
6481
6482         }
6483
6484         # footer
6485         print "</tbody>\n".
6486               "</table>\n"; # class="blame"
6487         print "</div>\n";   # class="blame_body"
6488         close $fd
6489                 or print "Reading blob failed\n";
6490
6491         git_footer_html();
6492 }
6493
6494 sub git_blame {
6495         git_blame_common();
6496 }
6497
6498 sub git_blame_incremental {
6499         git_blame_common('incremental');
6500 }
6501
6502 sub git_blame_data {
6503         git_blame_common('data');
6504 }
6505
6506 sub git_tags {
6507         my $head = git_get_head_hash($project);
6508         git_header_html();
6509         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6510         git_print_header_div('summary', $project);
6511
6512         my @tagslist = git_get_tags_list();
6513         if (@tagslist) {
6514                 git_tags_body(\@tagslist);
6515         }
6516         git_footer_html();
6517 }
6518
6519 sub git_heads {
6520         my $head = git_get_head_hash($project);
6521         git_header_html();
6522         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6523         git_print_header_div('summary', $project);
6524
6525         my @headslist = git_get_heads_list();
6526         if (@headslist) {
6527                 git_heads_body(\@headslist, $head);
6528         }
6529         git_footer_html();
6530 }
6531
6532 # used both for single remote view and for list of all the remotes
6533 sub git_remotes {
6534         gitweb_check_feature('remote_heads')
6535                 or die_error(403, "Remote heads view is disabled");
6536
6537         my $head = git_get_head_hash($project);
6538         my $remote = $input_params{'hash'};
6539
6540         my $remotedata = git_get_remotes_list($remote);
6541         die_error(500, "Unable to get remote information") unless defined $remotedata;
6542
6543         unless (%$remotedata) {
6544                 die_error(404, defined $remote ?
6545                         "Remote $remote not found" :
6546                         "No remotes found");
6547         }
6548
6549         git_header_html(undef, undef, -action_extra => $remote);
6550         git_print_page_nav('', '',  $head, undef, $head,
6551                 format_ref_views($remote ? '' : 'remotes'));
6552
6553         fill_remote_heads($remotedata);
6554         if (defined $remote) {
6555                 git_print_header_div('remotes', "$remote remote for $project");
6556                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6557         } else {
6558                 git_print_header_div('summary', "$project remotes");
6559                 git_remotes_body($remotedata, undef, $head);
6560         }
6561
6562         git_footer_html();
6563 }
6564
6565 sub git_blob_plain {
6566         my $type = shift;
6567         my $expires;
6568
6569         if (!defined $hash) {
6570                 if (defined $file_name) {
6571                         my $base = $hash_base || git_get_head_hash($project);
6572                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6573                                 or die_error(404, "Cannot find file");
6574                 } else {
6575                         die_error(400, "No file name defined");
6576                 }
6577         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6578                 # blobs defined by non-textual hash id's can be cached
6579                 $expires = "+1d";
6580         }
6581
6582         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6583                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6584
6585         # content-type (can include charset)
6586         $type = blob_contenttype($fd, $file_name, $type);
6587
6588         # "save as" filename, even when no $file_name is given
6589         my $save_as = "$hash";
6590         if (defined $file_name) {
6591                 $save_as = $file_name;
6592         } elsif ($type =~ m/^text\//) {
6593                 $save_as .= '.txt';
6594         }
6595
6596         # With XSS prevention on, blobs of all types except a few known safe
6597         # ones are served with "Content-Disposition: attachment" to make sure
6598         # they don't run in our security domain.  For certain image types,
6599         # blob view writes an <img> tag referring to blob_plain view, and we
6600         # want to be sure not to break that by serving the image as an
6601         # attachment (though Firefox 3 doesn't seem to care).
6602         my $sandbox = $prevent_xss &&
6603                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6604
6605         # serve text/* as text/plain
6606         if ($prevent_xss &&
6607             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6608              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6609                 my $rest = $1;
6610                 $rest = defined $rest ? $rest : '';
6611                 $type = "text/plain$rest";
6612         }
6613
6614         print $cgi->header(
6615                 -type => $type,
6616                 -expires => $expires,
6617                 -content_disposition =>
6618                         ($sandbox ? 'attachment' : 'inline')
6619                         . '; filename="' . $save_as . '"');
6620         local $/ = undef;
6621         binmode STDOUT, ':raw';
6622         print <$fd>;
6623         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6624         close $fd;
6625 }
6626
6627 sub git_blob {
6628         my $expires;
6629
6630         if (!defined $hash) {
6631                 if (defined $file_name) {
6632                         my $base = $hash_base || git_get_head_hash($project);
6633                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6634                                 or die_error(404, "Cannot find file");
6635                 } else {
6636                         die_error(400, "No file name defined");
6637                 }
6638         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6639                 # blobs defined by non-textual hash id's can be cached
6640                 $expires = "+1d";
6641         }
6642
6643         my $have_blame = gitweb_check_feature('blame');
6644         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6645                 or die_error(500, "Couldn't cat $file_name, $hash");
6646         my $mimetype = blob_mimetype($fd, $file_name);
6647         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6648         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6649                 close $fd;
6650                 return git_blob_plain($mimetype);
6651         }
6652         # we can have blame only for text/* mimetype
6653         $have_blame &&= ($mimetype =~ m!^text/!);
6654
6655         my $highlight = gitweb_check_feature('highlight');
6656         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6657         $fd = run_highlighter($fd, $highlight, $syntax)
6658                 if $syntax;
6659
6660         git_header_html(undef, $expires);
6661         my $formats_nav = '';
6662         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6663                 if (defined $file_name) {
6664                         if ($have_blame) {
6665                                 $formats_nav .=
6666                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6667                                                 "blame") .
6668                                         " | ";
6669                         }
6670                         $formats_nav .=
6671                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6672                                         "history") .
6673                                 " | " .
6674                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6675                                         "raw") .
6676                                 " | " .
6677                                 $cgi->a({-href => href(action=>"blob",
6678                                                        hash_base=>"HEAD", file_name=>$file_name)},
6679                                         "HEAD");
6680                 } else {
6681                         $formats_nav .=
6682                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6683                                         "raw");
6684                 }
6685                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6686                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6687         } else {
6688                 print "<div class=\"page_nav\">\n" .
6689                       "<br/><br/></div>\n" .
6690                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6691         }
6692         git_print_page_path($file_name, "blob", $hash_base);
6693         print "<div class=\"page_body\">\n";
6694         if ($mimetype =~ m!^image/!) {
6695                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6696                 if ($file_name) {
6697                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6698                 }
6699                 print qq! src="! .
6700                       href(action=>"blob_plain", hash=>$hash,
6701                            hash_base=>$hash_base, file_name=>$file_name) .
6702                       qq!" />\n!;
6703         } else {
6704                 my $nr;
6705                 while (my $line = <$fd>) {
6706                         chomp $line;
6707                         $nr++;
6708                         $line = untabify($line);
6709                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6710                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6711                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6712                 }
6713         }
6714         close $fd
6715                 or print "Reading blob failed.\n";
6716         print "</div>";
6717         git_footer_html();
6718 }
6719
6720 sub git_tree {
6721         if (!defined $hash_base) {
6722                 $hash_base = "HEAD";
6723         }
6724         if (!defined $hash) {
6725                 if (defined $file_name) {
6726                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6727                 } else {
6728                         $hash = $hash_base;
6729                 }
6730         }
6731         die_error(404, "No such tree") unless defined($hash);
6732
6733         my $show_sizes = gitweb_check_feature('show-sizes');
6734         my $have_blame = gitweb_check_feature('blame');
6735
6736         my @entries = ();
6737         {
6738                 local $/ = "\0";
6739                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6740                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6741                         or die_error(500, "Open git-ls-tree failed");
6742                 @entries = map { chomp; $_ } <$fd>;
6743                 close $fd
6744                         or die_error(404, "Reading tree failed");
6745         }
6746
6747         my $refs = git_get_references();
6748         my $ref = format_ref_marker($refs, $hash_base);
6749         git_header_html();
6750         my $basedir = '';
6751         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6752                 my @views_nav = ();
6753                 if (defined $file_name) {
6754                         push @views_nav,
6755                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6756                                         "history"),
6757                                 $cgi->a({-href => href(action=>"tree",
6758                                                        hash_base=>"HEAD", file_name=>$file_name)},
6759                                         "HEAD"),
6760                 }
6761                 my $snapshot_links = format_snapshot_links($hash);
6762                 if (defined $snapshot_links) {
6763                         # FIXME: Should be available when we have no hash base as well.
6764                         push @views_nav, $snapshot_links;
6765                 }
6766                 git_print_page_nav('tree','', $hash_base, undef, undef,
6767                                    join(' | ', @views_nav));
6768                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6769         } else {
6770                 undef $hash_base;
6771                 print "<div class=\"page_nav\">\n";
6772                 print "<br/><br/></div>\n";
6773                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6774         }
6775         if (defined $file_name) {
6776                 $basedir = $file_name;
6777                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6778                         $basedir .= '/';
6779                 }
6780                 git_print_page_path($file_name, 'tree', $hash_base);
6781         }
6782         print "<div class=\"page_body\">\n";
6783         print "<table class=\"tree\">\n";
6784         my $alternate = 1;
6785         # '..' (top directory) link if possible
6786         if (defined $hash_base &&
6787             defined $file_name && $file_name =~ m![^/]+$!) {
6788                 if ($alternate) {
6789                         print "<tr class=\"dark\">\n";
6790                 } else {
6791                         print "<tr class=\"light\">\n";
6792                 }
6793                 $alternate ^= 1;
6794
6795                 my $up = $file_name;
6796                 $up =~ s!/?[^/]+$!!;
6797                 undef $up unless $up;
6798                 # based on git_print_tree_entry
6799                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6800                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6801                 print '<td class="list">';
6802                 print $cgi->a({-href => href(action=>"tree",
6803                                              hash_base=>$hash_base,
6804                                              file_name=>$up)},
6805                               "..");
6806                 print "</td>\n";
6807                 print "<td class=\"link\"></td>\n";
6808
6809                 print "</tr>\n";
6810         }
6811         foreach my $line (@entries) {
6812                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6813
6814                 if ($alternate) {
6815                         print "<tr class=\"dark\">\n";
6816                 } else {
6817                         print "<tr class=\"light\">\n";
6818                 }
6819                 $alternate ^= 1;
6820
6821                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6822
6823                 print "</tr>\n";
6824         }
6825         print "</table>\n" .
6826               "</div>";
6827         git_footer_html();
6828 }
6829
6830 sub snapshot_name {
6831         my ($project, $hash) = @_;
6832
6833         # path/to/project.git  -> project
6834         # path/to/project/.git -> project
6835         my $name = to_utf8($project);
6836         $name =~ s,([^/])/*\.git$,$1,;
6837         $name = basename($name);
6838         # sanitize name
6839         $name =~ s/[[:cntrl:]]/?/g;
6840
6841         my $ver = $hash;
6842         if ($hash =~ /^[0-9a-fA-F]+$/) {
6843                 # shorten SHA-1 hash
6844                 my $full_hash = git_get_full_hash($project, $hash);
6845                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6846                         $ver = git_get_short_hash($project, $hash);
6847                 }
6848         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6849                 # tags don't need shortened SHA-1 hash
6850                 $ver = $1;
6851         } else {
6852                 # branches and other need shortened SHA-1 hash
6853                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6854                         $ver = $1;
6855                 }
6856                 $ver .= '-' . git_get_short_hash($project, $hash);
6857         }
6858         # in case of hierarchical branch names
6859         $ver =~ s!/!.!g;
6860
6861         # name = project-version_string
6862         $name = "$name-$ver";
6863
6864         return wantarray ? ($name, $name) : $name;
6865 }
6866
6867 sub git_snapshot {
6868         my $format = $input_params{'snapshot_format'};
6869         if (!@snapshot_fmts) {
6870                 die_error(403, "Snapshots not allowed");
6871         }
6872         # default to first supported snapshot format
6873         $format ||= $snapshot_fmts[0];
6874         if ($format !~ m/^[a-z0-9]+$/) {
6875                 die_error(400, "Invalid snapshot format parameter");
6876         } elsif (!exists($known_snapshot_formats{$format})) {
6877                 die_error(400, "Unknown snapshot format");
6878         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6879                 die_error(403, "Snapshot format not allowed");
6880         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6881                 die_error(403, "Unsupported snapshot format");
6882         }
6883
6884         my $type = git_get_type("$hash^{}");
6885         if (!$type) {
6886                 die_error(404, 'Object does not exist');
6887         }  elsif ($type eq 'blob') {
6888                 die_error(400, 'Object is not a tree-ish');
6889         }
6890
6891         my ($name, $prefix) = snapshot_name($project, $hash);
6892         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6893         my $cmd = quote_command(
6894                 git_cmd(), 'archive',
6895                 "--format=$known_snapshot_formats{$format}{'format'}",
6896                 "--prefix=$prefix/", $hash);
6897         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6898                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6899         }
6900
6901         $filename =~ s/(["\\])/\\$1/g;
6902         print $cgi->header(
6903                 -type => $known_snapshot_formats{$format}{'type'},
6904                 -content_disposition => 'inline; filename="' . $filename . '"',
6905                 -status => '200 OK');
6906
6907         open my $fd, "-|", $cmd
6908                 or die_error(500, "Execute git-archive failed");
6909         binmode STDOUT, ':raw';
6910         print <$fd>;
6911         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6912         close $fd;
6913 }
6914
6915 sub git_log_generic {
6916         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6917
6918         my $head = git_get_head_hash($project);
6919         if (!defined $base) {
6920                 $base = $head;
6921         }
6922         if (!defined $page) {
6923                 $page = 0;
6924         }
6925         my $refs = git_get_references();
6926
6927         my $commit_hash = $base;
6928         if (defined $parent) {
6929                 $commit_hash = "$parent..$base";
6930         }
6931         my @commitlist =
6932                 parse_commits($commit_hash, 101, (100 * $page),
6933                               defined $file_name ? ($file_name, "--full-history") : ());
6934
6935         my $ftype;
6936         if (!defined $file_hash && defined $file_name) {
6937                 # some commits could have deleted file in question,
6938                 # and not have it in tree, but one of them has to have it
6939                 for (my $i = 0; $i < @commitlist; $i++) {
6940                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6941                         last if defined $file_hash;
6942                 }
6943         }
6944         if (defined $file_hash) {
6945                 $ftype = git_get_type($file_hash);
6946         }
6947         if (defined $file_name && !defined $ftype) {
6948                 die_error(500, "Unknown type of object");
6949         }
6950         my %co;
6951         if (defined $file_name) {
6952                 %co = parse_commit($base)
6953                         or die_error(404, "Unknown commit object");
6954         }
6955
6956
6957         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6958         my $next_link = '';
6959         if ($#commitlist >= 100) {
6960                 $next_link =
6961                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6962                                  -accesskey => "n", -title => "Alt-n"}, "next");
6963         }
6964         my $patch_max = gitweb_get_feature('patches');
6965         if ($patch_max && !defined $file_name) {
6966                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6967                         $paging_nav .= " &sdot; " .
6968                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6969                                         "patches");
6970                 }
6971         }
6972
6973         git_header_html();
6974         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6975         if (defined $file_name) {
6976                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6977         } else {
6978                 git_print_header_div('summary', $project)
6979         }
6980         git_print_page_path($file_name, $ftype, $hash_base)
6981                 if (defined $file_name);
6982
6983         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6984                      $file_name, $file_hash, $ftype);
6985
6986         git_footer_html();
6987 }
6988
6989 sub git_log {
6990         git_log_generic('log', \&git_log_body,
6991                         $hash, $hash_parent);
6992 }
6993
6994 sub git_commit {
6995         $hash ||= $hash_base || "HEAD";
6996         my %co = parse_commit($hash)
6997             or die_error(404, "Unknown commit object");
6998
6999         my $parent  = $co{'parent'};
7000         my $parents = $co{'parents'}; # listref
7001
7002         # we need to prepare $formats_nav before any parameter munging
7003         my $formats_nav;
7004         if (!defined $parent) {
7005                 # --root commitdiff
7006                 $formats_nav .= '(initial)';
7007         } elsif (@$parents == 1) {
7008                 # single parent commit
7009                 $formats_nav .=
7010                         '(parent: ' .
7011                         $cgi->a({-href => href(action=>"commit",
7012                                                hash=>$parent)},
7013                                 esc_html(substr($parent, 0, 7))) .
7014                         ')';
7015         } else {
7016                 # merge commit
7017                 $formats_nav .=
7018                         '(merge: ' .
7019                         join(' ', map {
7020                                 $cgi->a({-href => href(action=>"commit",
7021                                                        hash=>$_)},
7022                                         esc_html(substr($_, 0, 7)));
7023                         } @$parents ) .
7024                         ')';
7025         }
7026         if (gitweb_check_feature('patches') && @$parents <= 1) {
7027                 $formats_nav .= " | " .
7028                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7029                                 "patch");
7030         }
7031
7032         if (!defined $parent) {
7033                 $parent = "--root";
7034         }
7035         my @difftree;
7036         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7037                 @diff_opts,
7038                 (@$parents <= 1 ? $parent : '-c'),
7039                 $hash, "--"
7040                 or die_error(500, "Open git-diff-tree failed");
7041         @difftree = map { chomp; $_ } <$fd>;
7042         close $fd or die_error(404, "Reading git-diff-tree failed");
7043
7044         # non-textual hash id's can be cached
7045         my $expires;
7046         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7047                 $expires = "+1d";
7048         }
7049         my $refs = git_get_references();
7050         my $ref = format_ref_marker($refs, $co{'id'});
7051
7052         git_header_html(undef, $expires);
7053         git_print_page_nav('commit', '',
7054                            $hash, $co{'tree'}, $hash,
7055                            $formats_nav);
7056
7057         if (defined $co{'parent'}) {
7058                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7059         } else {
7060                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7061         }
7062         print "<div class=\"title_text\">\n" .
7063               "<table class=\"object_header\">\n";
7064         git_print_authorship_rows(\%co);
7065         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7066         print "<tr>" .
7067               "<td>tree</td>" .
7068               "<td class=\"sha1\">" .
7069               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7070                        class => "list"}, $co{'tree'}) .
7071               "</td>" .
7072               "<td class=\"link\">" .
7073               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7074                       "tree");
7075         my $snapshot_links = format_snapshot_links($hash);
7076         if (defined $snapshot_links) {
7077                 print " | " . $snapshot_links;
7078         }
7079         print "</td>" .
7080               "</tr>\n";
7081
7082         foreach my $par (@$parents) {
7083                 print "<tr>" .
7084                       "<td>parent</td>" .
7085                       "<td class=\"sha1\">" .
7086                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7087                                class => "list"}, $par) .
7088                       "</td>" .
7089                       "<td class=\"link\">" .
7090                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7091                       " | " .
7092                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7093                       "</td>" .
7094                       "</tr>\n";
7095         }
7096         print "</table>".
7097               "</div>\n";
7098
7099         print "<div class=\"page_body\">\n";
7100         git_print_log($co{'comment'});
7101         print "</div>\n";
7102
7103         git_difftree_body(\@difftree, $hash, @$parents);
7104
7105         git_footer_html();
7106 }
7107
7108 sub git_object {
7109         # object is defined by:
7110         # - hash or hash_base alone
7111         # - hash_base and file_name
7112         my $type;
7113
7114         # - hash or hash_base alone
7115         if ($hash || ($hash_base && !defined $file_name)) {
7116                 my $object_id = $hash || $hash_base;
7117
7118                 open my $fd, "-|", quote_command(
7119                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7120                         or die_error(404, "Object does not exist");
7121                 $type = <$fd>;
7122                 chomp $type;
7123                 close $fd
7124                         or die_error(404, "Object does not exist");
7125
7126         # - hash_base and file_name
7127         } elsif ($hash_base && defined $file_name) {
7128                 $file_name =~ s,/+$,,;
7129
7130                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7131                         or die_error(404, "Base object does not exist");
7132
7133                 # here errors should not hapen
7134                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7135                         or die_error(500, "Open git-ls-tree failed");
7136                 my $line = <$fd>;
7137                 close $fd;
7138
7139                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7140                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7141                         die_error(404, "File or directory for given base does not exist");
7142                 }
7143                 $type = $2;
7144                 $hash = $3;
7145         } else {
7146                 die_error(400, "Not enough information to find object");
7147         }
7148
7149         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7150                                           hash=>$hash, hash_base=>$hash_base,
7151                                           file_name=>$file_name),
7152                              -status => '302 Found');
7153 }
7154
7155 sub git_blobdiff {
7156         my $format = shift || 'html';
7157         my $diff_style = $input_params{'diff_style'} || 'inline';
7158
7159         my $fd;
7160         my @difftree;
7161         my %diffinfo;
7162         my $expires;
7163
7164         # preparing $fd and %diffinfo for git_patchset_body
7165         # new style URI
7166         if (defined $hash_base && defined $hash_parent_base) {
7167                 if (defined $file_name) {
7168                         # read raw output
7169                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7170                                 $hash_parent_base, $hash_base,
7171                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7172                                 or die_error(500, "Open git-diff-tree failed");
7173                         @difftree = map { chomp; $_ } <$fd>;
7174                         close $fd
7175                                 or die_error(404, "Reading git-diff-tree failed");
7176                         @difftree
7177                                 or die_error(404, "Blob diff not found");
7178
7179                 } elsif (defined $hash &&
7180                          $hash =~ /[0-9a-fA-F]{40}/) {
7181                         # try to find filename from $hash
7182
7183                         # read filtered raw output
7184                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7185                                 $hash_parent_base, $hash_base, "--"
7186                                 or die_error(500, "Open git-diff-tree failed");
7187                         @difftree =
7188                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7189                                 # $hash == to_id
7190                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7191                                 map { chomp; $_ } <$fd>;
7192                         close $fd
7193                                 or die_error(404, "Reading git-diff-tree failed");
7194                         @difftree
7195                                 or die_error(404, "Blob diff not found");
7196
7197                 } else {
7198                         die_error(400, "Missing one of the blob diff parameters");
7199                 }
7200
7201                 if (@difftree > 1) {
7202                         die_error(400, "Ambiguous blob diff specification");
7203                 }
7204
7205                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7206                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7207                 $file_name   ||= $diffinfo{'to_file'};
7208
7209                 $hash_parent ||= $diffinfo{'from_id'};
7210                 $hash        ||= $diffinfo{'to_id'};
7211
7212                 # non-textual hash id's can be cached
7213                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7214                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7215                         $expires = '+1d';
7216                 }
7217
7218                 # open patch output
7219                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7220                         '-p', ($format eq 'html' ? "--full-index" : ()),
7221                         $hash_parent_base, $hash_base,
7222                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7223                         or die_error(500, "Open git-diff-tree failed");
7224         }
7225
7226         # old/legacy style URI -- not generated anymore since 1.4.3.
7227         if (!%diffinfo) {
7228                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7229         }
7230
7231         # header
7232         if ($format eq 'html') {
7233                 my $formats_nav =
7234                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7235                                 "raw");
7236                 $formats_nav .= diff_style_nav($diff_style);
7237                 git_header_html(undef, $expires);
7238                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7239                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7240                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7241                 } else {
7242                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7243                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7244                 }
7245                 if (defined $file_name) {
7246                         git_print_page_path($file_name, "blob", $hash_base);
7247                 } else {
7248                         print "<div class=\"page_path\"></div>\n";
7249                 }
7250
7251         } elsif ($format eq 'plain') {
7252                 print $cgi->header(
7253                         -type => 'text/plain',
7254                         -charset => 'utf-8',
7255                         -expires => $expires,
7256                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7257
7258                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7259
7260         } else {
7261                 die_error(400, "Unknown blobdiff format");
7262         }
7263
7264         # patch
7265         if ($format eq 'html') {
7266                 print "<div class=\"page_body\">\n";
7267
7268                 git_patchset_body($fd, $diff_style,
7269                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7270                 close $fd;
7271
7272                 print "</div>\n"; # class="page_body"
7273                 git_footer_html();
7274
7275         } else {
7276                 while (my $line = <$fd>) {
7277                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7278                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7279
7280                         print $line;
7281
7282                         last if $line =~ m!^\+\+\+!;
7283                 }
7284                 local $/ = undef;
7285                 print <$fd>;
7286                 close $fd;
7287         }
7288 }
7289
7290 sub git_blobdiff_plain {
7291         git_blobdiff('plain');
7292 }
7293
7294 # assumes that it is added as later part of already existing navigation,
7295 # so it returns "| foo | bar" rather than just "foo | bar"
7296 sub diff_style_nav {
7297         my ($diff_style, $is_combined) = @_;
7298         $diff_style ||= 'inline';
7299
7300         return "" if ($is_combined);
7301
7302         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7303         my %styles = @styles;
7304         @styles =
7305                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7306
7307         return join '',
7308                 map { " | ".$_ }
7309                 map {
7310                         $_ eq $diff_style ? $styles{$_} :
7311                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7312                 } @styles;
7313 }
7314
7315 sub git_commitdiff {
7316         my %params = @_;
7317         my $format = $params{-format} || 'html';
7318         my $diff_style = $input_params{'diff_style'} || 'inline';
7319
7320         my ($patch_max) = gitweb_get_feature('patches');
7321         if ($format eq 'patch') {
7322                 die_error(403, "Patch view not allowed") unless $patch_max;
7323         }
7324
7325         $hash ||= $hash_base || "HEAD";
7326         my %co = parse_commit($hash)
7327             or die_error(404, "Unknown commit object");
7328
7329         # choose format for commitdiff for merge
7330         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7331                 $hash_parent = '--cc';
7332         }
7333         # we need to prepare $formats_nav before almost any parameter munging
7334         my $formats_nav;
7335         if ($format eq 'html') {
7336                 $formats_nav =
7337                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7338                                 "raw");
7339                 if ($patch_max && @{$co{'parents'}} <= 1) {
7340                         $formats_nav .= " | " .
7341                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7342                                         "patch");
7343                 }
7344                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7345
7346                 if (defined $hash_parent &&
7347                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7348                         # commitdiff with two commits given
7349                         my $hash_parent_short = $hash_parent;
7350                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7351                                 $hash_parent_short = substr($hash_parent, 0, 7);
7352                         }
7353                         $formats_nav .=
7354                                 ' (from';
7355                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7356                                 if ($co{'parents'}[$i] eq $hash_parent) {
7357                                         $formats_nav .= ' parent ' . ($i+1);
7358                                         last;
7359                                 }
7360                         }
7361                         $formats_nav .= ': ' .
7362                                 $cgi->a({-href => href(-replay=>1,
7363                                                        hash=>$hash_parent, hash_base=>undef)},
7364                                         esc_html($hash_parent_short)) .
7365                                 ')';
7366                 } elsif (!$co{'parent'}) {
7367                         # --root commitdiff
7368                         $formats_nav .= ' (initial)';
7369                 } elsif (scalar @{$co{'parents'}} == 1) {
7370                         # single parent commit
7371                         $formats_nav .=
7372                                 ' (parent: ' .
7373                                 $cgi->a({-href => href(-replay=>1,
7374                                                        hash=>$co{'parent'}, hash_base=>undef)},
7375                                         esc_html(substr($co{'parent'}, 0, 7))) .
7376                                 ')';
7377                 } else {
7378                         # merge commit
7379                         if ($hash_parent eq '--cc') {
7380                                 $formats_nav .= ' | ' .
7381                                         $cgi->a({-href => href(-replay=>1,
7382                                                                hash=>$hash, hash_parent=>'-c')},
7383                                                 'combined');
7384                         } else { # $hash_parent eq '-c'
7385                                 $formats_nav .= ' | ' .
7386                                         $cgi->a({-href => href(-replay=>1,
7387                                                                hash=>$hash, hash_parent=>'--cc')},
7388                                                 'compact');
7389                         }
7390                         $formats_nav .=
7391                                 ' (merge: ' .
7392                                 join(' ', map {
7393                                         $cgi->a({-href => href(-replay=>1,
7394                                                                hash=>$_, hash_base=>undef)},
7395                                                 esc_html(substr($_, 0, 7)));
7396                                 } @{$co{'parents'}} ) .
7397                                 ')';
7398                 }
7399         }
7400
7401         my $hash_parent_param = $hash_parent;
7402         if (!defined $hash_parent_param) {
7403                 # --cc for multiple parents, --root for parentless
7404                 $hash_parent_param =
7405                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7406         }
7407
7408         # read commitdiff
7409         my $fd;
7410         my @difftree;
7411         if ($format eq 'html') {
7412                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7413                         "--no-commit-id", "--patch-with-raw", "--full-index",
7414                         $hash_parent_param, $hash, "--"
7415                         or die_error(500, "Open git-diff-tree failed");
7416
7417                 while (my $line = <$fd>) {
7418                         chomp $line;
7419                         # empty line ends raw part of diff-tree output
7420                         last unless $line;
7421                         push @difftree, scalar parse_difftree_raw_line($line);
7422                 }
7423
7424         } elsif ($format eq 'plain') {
7425                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7426                         '-p', $hash_parent_param, $hash, "--"
7427                         or die_error(500, "Open git-diff-tree failed");
7428         } elsif ($format eq 'patch') {
7429                 # For commit ranges, we limit the output to the number of
7430                 # patches specified in the 'patches' feature.
7431                 # For single commits, we limit the output to a single patch,
7432                 # diverging from the git-format-patch default.
7433                 my @commit_spec = ();
7434                 if ($hash_parent) {
7435                         if ($patch_max > 0) {
7436                                 push @commit_spec, "-$patch_max";
7437                         }
7438                         push @commit_spec, '-n', "$hash_parent..$hash";
7439                 } else {
7440                         if ($params{-single}) {
7441                                 push @commit_spec, '-1';
7442                         } else {
7443                                 if ($patch_max > 0) {
7444                                         push @commit_spec, "-$patch_max";
7445                                 }
7446                                 push @commit_spec, "-n";
7447                         }
7448                         push @commit_spec, '--root', $hash;
7449                 }
7450                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7451                         '--encoding=utf8', '--stdout', @commit_spec
7452                         or die_error(500, "Open git-format-patch failed");
7453         } else {
7454                 die_error(400, "Unknown commitdiff format");
7455         }
7456
7457         # non-textual hash id's can be cached
7458         my $expires;
7459         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7460                 $expires = "+1d";
7461         }
7462
7463         # write commit message
7464         if ($format eq 'html') {
7465                 my $refs = git_get_references();
7466                 my $ref = format_ref_marker($refs, $co{'id'});
7467
7468                 git_header_html(undef, $expires);
7469                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7470                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7471                 print "<div class=\"title_text\">\n" .
7472                       "<table class=\"object_header\">\n";
7473                 git_print_authorship_rows(\%co);
7474                 print "</table>".
7475                       "</div>\n";
7476                 print "<div class=\"page_body\">\n";
7477                 if (@{$co{'comment'}} > 1) {
7478                         print "<div class=\"log\">\n";
7479                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7480                         print "</div>\n"; # class="log"
7481                 }
7482
7483         } elsif ($format eq 'plain') {
7484                 my $refs = git_get_references("tags");
7485                 my $tagname = git_get_rev_name_tags($hash);
7486                 my $filename = basename($project) . "-$hash.patch";
7487
7488                 print $cgi->header(
7489                         -type => 'text/plain',
7490                         -charset => 'utf-8',
7491                         -expires => $expires,
7492                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7493                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7494                 print "From: " . to_utf8($co{'author'}) . "\n";
7495                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7496                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7497
7498                 print "X-Git-Tag: $tagname\n" if $tagname;
7499                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7500
7501                 foreach my $line (@{$co{'comment'}}) {
7502                         print to_utf8($line) . "\n";
7503                 }
7504                 print "---\n\n";
7505         } elsif ($format eq 'patch') {
7506                 my $filename = basename($project) . "-$hash.patch";
7507
7508                 print $cgi->header(
7509                         -type => 'text/plain',
7510                         -charset => 'utf-8',
7511                         -expires => $expires,
7512                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7513         }
7514
7515         # write patch
7516         if ($format eq 'html') {
7517                 my $use_parents = !defined $hash_parent ||
7518                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7519                 git_difftree_body(\@difftree, $hash,
7520                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7521                 print "<br/>\n";
7522
7523                 git_patchset_body($fd, $diff_style,
7524                                   \@difftree, $hash,
7525                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7526                 close $fd;
7527                 print "</div>\n"; # class="page_body"
7528                 git_footer_html();
7529
7530         } elsif ($format eq 'plain') {
7531                 local $/ = undef;
7532                 print <$fd>;
7533                 close $fd
7534                         or print "Reading git-diff-tree failed\n";
7535         } elsif ($format eq 'patch') {
7536                 local $/ = undef;
7537                 print <$fd>;
7538                 close $fd
7539                         or print "Reading git-format-patch failed\n";
7540         }
7541 }
7542
7543 sub git_commitdiff_plain {
7544         git_commitdiff(-format => 'plain');
7545 }
7546
7547 # format-patch-style patches
7548 sub git_patch {
7549         git_commitdiff(-format => 'patch', -single => 1);
7550 }
7551
7552 sub git_patches {
7553         git_commitdiff(-format => 'patch');
7554 }
7555
7556 sub git_history {
7557         git_log_generic('history', \&git_history_body,
7558                         $hash_base, $hash_parent_base,
7559                         $file_name, $hash);
7560 }
7561
7562 sub git_search {
7563         $searchtype ||= 'commit';
7564
7565         # check if appropriate features are enabled
7566         gitweb_check_feature('search')
7567                 or die_error(403, "Search is disabled");
7568         if ($searchtype eq 'pickaxe') {
7569                 # pickaxe may take all resources of your box and run for several minutes
7570                 # with every query - so decide by yourself how public you make this feature
7571                 gitweb_check_feature('pickaxe')
7572                         or die_error(403, "Pickaxe search is disabled");
7573         }
7574         if ($searchtype eq 'grep') {
7575                 # grep search might be potentially CPU-intensive, too
7576                 gitweb_check_feature('grep')
7577                         or die_error(403, "Grep search is disabled");
7578         }
7579
7580         if (!defined $searchtext) {
7581                 die_error(400, "Text field is empty");
7582         }
7583         if (!defined $hash) {
7584                 $hash = git_get_head_hash($project);
7585         }
7586         my %co = parse_commit($hash);
7587         if (!%co) {
7588                 die_error(404, "Unknown commit object");
7589         }
7590         if (!defined $page) {
7591                 $page = 0;
7592         }
7593
7594         if ($searchtype eq 'commit' ||
7595             $searchtype eq 'author' ||
7596             $searchtype eq 'committer') {
7597                 git_search_message(%co);
7598         } elsif ($searchtype eq 'pickaxe') {
7599                 git_search_changes(%co);
7600         } elsif ($searchtype eq 'grep') {
7601                 git_search_files(%co);
7602         } else {
7603                 die_error(400, "Unknown search type");
7604         }
7605 }
7606
7607 sub git_search_help {
7608         git_header_html();
7609         git_print_page_nav('','', $hash,$hash,$hash);
7610         print <<EOT;
7611 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7612 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7613 the pattern entered is recognized as the POSIX extended
7614 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7615 insensitive).</p>
7616 <dl>
7617 <dt><b>commit</b></dt>
7618 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7619 EOT
7620         my $have_grep = gitweb_check_feature('grep');
7621         if ($have_grep) {
7622                 print <<EOT;
7623 <dt><b>grep</b></dt>
7624 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7625     a different one) are searched for the given pattern. On large trees, this search can take
7626 a while and put some strain on the server, so please use it with some consideration. Note that
7627 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7628 case-sensitive.</dd>
7629 EOT
7630         }
7631         print <<EOT;
7632 <dt><b>author</b></dt>
7633 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7634 <dt><b>committer</b></dt>
7635 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7636 EOT
7637         my $have_pickaxe = gitweb_check_feature('pickaxe');
7638         if ($have_pickaxe) {
7639                 print <<EOT;
7640 <dt><b>pickaxe</b></dt>
7641 <dd>All commits that caused the string to appear or disappear from any file (changes that
7642 added, removed or "modified" the string) will be listed. This search can take a while and
7643 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7644 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7645 EOT
7646         }
7647         print "</dl>\n";
7648         git_footer_html();
7649 }
7650
7651 sub git_shortlog {
7652         git_log_generic('shortlog', \&git_shortlog_body,
7653                         $hash, $hash_parent);
7654 }
7655
7656 ## ......................................................................
7657 ## feeds (RSS, Atom; OPML)
7658
7659 sub git_feed {
7660         my $format = shift || 'atom';
7661         my $have_blame = gitweb_check_feature('blame');
7662
7663         # Atom: http://www.atomenabled.org/developers/syndication/
7664         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7665         if ($format ne 'rss' && $format ne 'atom') {
7666                 die_error(400, "Unknown web feed format");
7667         }
7668
7669         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7670         my $head = $hash || 'HEAD';
7671         my @commitlist = parse_commits($head, 150, 0, $file_name);
7672
7673         my %latest_commit;
7674         my %latest_date;
7675         my $content_type = "application/$format+xml";
7676         if (defined $cgi->http('HTTP_ACCEPT') &&
7677                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7678                 # browser (feed reader) prefers text/xml
7679                 $content_type = 'text/xml';
7680         }
7681         if (defined($commitlist[0])) {
7682                 %latest_commit = %{$commitlist[0]};
7683                 my $latest_epoch = $latest_commit{'committer_epoch'};
7684                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7685                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7686                 if (defined $if_modified) {
7687                         my $since;
7688                         if (eval { require HTTP::Date; 1; }) {
7689                                 $since = HTTP::Date::str2time($if_modified);
7690                         } elsif (eval { require Time::ParseDate; 1; }) {
7691                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7692                         }
7693                         if (defined $since && $latest_epoch <= $since) {
7694                                 print $cgi->header(
7695                                         -type => $content_type,
7696                                         -charset => 'utf-8',
7697                                         -last_modified => $latest_date{'rfc2822'},
7698                                         -status => '304 Not Modified');
7699                                 return;
7700                         }
7701                 }
7702                 print $cgi->header(
7703                         -type => $content_type,
7704                         -charset => 'utf-8',
7705                         -last_modified => $latest_date{'rfc2822'});
7706         } else {
7707                 print $cgi->header(
7708                         -type => $content_type,
7709                         -charset => 'utf-8');
7710         }
7711
7712         # Optimization: skip generating the body if client asks only
7713         # for Last-Modified date.
7714         return if ($cgi->request_method() eq 'HEAD');
7715
7716         # header variables
7717         my $title = "$site_name - $project/$action";
7718         my $feed_type = 'log';
7719         if (defined $hash) {
7720                 $title .= " - '$hash'";
7721                 $feed_type = 'branch log';
7722                 if (defined $file_name) {
7723                         $title .= " :: $file_name";
7724                         $feed_type = 'history';
7725                 }
7726         } elsif (defined $file_name) {
7727                 $title .= " - $file_name";
7728                 $feed_type = 'history';
7729         }
7730         $title .= " $feed_type";
7731         my $descr = git_get_project_description($project);
7732         if (defined $descr) {
7733                 $descr = esc_html($descr);
7734         } else {
7735                 $descr = "$project " .
7736                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7737                          " feed";
7738         }
7739         my $owner = git_get_project_owner($project);
7740         $owner = esc_html($owner);
7741
7742         #header
7743         my $alt_url;
7744         if (defined $file_name) {
7745                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7746         } elsif (defined $hash) {
7747                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7748         } else {
7749                 $alt_url = href(-full=>1, action=>"summary");
7750         }
7751         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7752         if ($format eq 'rss') {
7753                 print <<XML;
7754 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7755 <channel>
7756 XML
7757                 print "<title>$title</title>\n" .
7758                       "<link>$alt_url</link>\n" .
7759                       "<description>$descr</description>\n" .
7760                       "<language>en</language>\n" .
7761                       # project owner is responsible for 'editorial' content
7762                       "<managingEditor>$owner</managingEditor>\n";
7763                 if (defined $logo || defined $favicon) {
7764                         # prefer the logo to the favicon, since RSS
7765                         # doesn't allow both
7766                         my $img = esc_url($logo || $favicon);
7767                         print "<image>\n" .
7768                               "<url>$img</url>\n" .
7769                               "<title>$title</title>\n" .
7770                               "<link>$alt_url</link>\n" .
7771                               "</image>\n";
7772                 }
7773                 if (%latest_date) {
7774                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7775                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7776                 }
7777                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7778         } elsif ($format eq 'atom') {
7779                 print <<XML;
7780 <feed xmlns="http://www.w3.org/2005/Atom">
7781 XML
7782                 print "<title>$title</title>\n" .
7783                       "<subtitle>$descr</subtitle>\n" .
7784                       '<link rel="alternate" type="text/html" href="' .
7785                       $alt_url . '" />' . "\n" .
7786                       '<link rel="self" type="' . $content_type . '" href="' .
7787                       $cgi->self_url() . '" />' . "\n" .
7788                       "<id>" . href(-full=>1) . "</id>\n" .
7789                       # use project owner for feed author
7790                       "<author><name>$owner</name></author>\n";
7791                 if (defined $favicon) {
7792                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7793                 }
7794                 if (defined $logo) {
7795                         # not twice as wide as tall: 72 x 27 pixels
7796                         print "<logo>" . esc_url($logo) . "</logo>\n";
7797                 }
7798                 if (! %latest_date) {
7799                         # dummy date to keep the feed valid until commits trickle in:
7800                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7801                 } else {
7802                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7803                 }
7804                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7805         }
7806
7807         # contents
7808         for (my $i = 0; $i <= $#commitlist; $i++) {
7809                 my %co = %{$commitlist[$i]};
7810                 my $commit = $co{'id'};
7811                 # we read 150, we always show 30 and the ones more recent than 48 hours
7812                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7813                         last;
7814                 }
7815                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7816
7817                 # get list of changed files
7818                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7819                         $co{'parent'} || "--root",
7820                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7821                         or next;
7822                 my @difftree = map { chomp; $_ } <$fd>;
7823                 close $fd
7824                         or next;
7825
7826                 # print element (entry, item)
7827                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7828                 if ($format eq 'rss') {
7829                         print "<item>\n" .
7830                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7831                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7832                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7833                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7834                               "<link>$co_url</link>\n" .
7835                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7836                               "<content:encoded>" .
7837                               "<![CDATA[\n";
7838                 } elsif ($format eq 'atom') {
7839                         print "<entry>\n" .
7840                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7841                               "<updated>$cd{'iso-8601'}</updated>\n" .
7842                               "<author>\n" .
7843                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7844                         if ($co{'author_email'}) {
7845                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7846                         }
7847                         print "</author>\n" .
7848                               # use committer for contributor
7849                               "<contributor>\n" .
7850                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7851                         if ($co{'committer_email'}) {
7852                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7853                         }
7854                         print "</contributor>\n" .
7855                               "<published>$cd{'iso-8601'}</published>\n" .
7856                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7857                               "<id>$co_url</id>\n" .
7858                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7859                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7860                 }
7861                 my $comment = $co{'comment'};
7862                 print "<pre>\n";
7863                 foreach my $line (@$comment) {
7864                         $line = esc_html($line);
7865                         print "$line\n";
7866                 }
7867                 print "</pre><ul>\n";
7868                 foreach my $difftree_line (@difftree) {
7869                         my %difftree = parse_difftree_raw_line($difftree_line);
7870                         next if !$difftree{'from_id'};
7871
7872                         my $file = $difftree{'file'} || $difftree{'to_file'};
7873
7874                         print "<li>" .
7875                               "[" .
7876                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7877                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7878                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7879                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7880                                       -title => "diff"}, 'D');
7881                         if ($have_blame) {
7882                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7883                                                              file_name=>$file, hash_base=>$commit),
7884                                               -title => "blame"}, 'B');
7885                         }
7886                         # if this is not a feed of a file history
7887                         if (!defined $file_name || $file_name ne $file) {
7888                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7889                                                              file_name=>$file, hash=>$commit),
7890                                               -title => "history"}, 'H');
7891                         }
7892                         $file = esc_path($file);
7893                         print "] ".
7894                               "$file</li>\n";
7895                 }
7896                 if ($format eq 'rss') {
7897                         print "</ul>]]>\n" .
7898                               "</content:encoded>\n" .
7899                               "</item>\n";
7900                 } elsif ($format eq 'atom') {
7901                         print "</ul>\n</div>\n" .
7902                               "</content>\n" .
7903                               "</entry>\n";
7904                 }
7905         }
7906
7907         # end of feed
7908         if ($format eq 'rss') {
7909                 print "</channel>\n</rss>\n";
7910         } elsif ($format eq 'atom') {
7911                 print "</feed>\n";
7912         }
7913 }
7914
7915 sub git_rss {
7916         git_feed('rss');
7917 }
7918
7919 sub git_atom {
7920         git_feed('atom');
7921 }
7922
7923 sub git_opml {
7924         my @list = git_get_projects_list($project_filter, $strict_export);
7925         if (!@list) {
7926                 die_error(404, "No projects found");
7927         }
7928
7929         print $cgi->header(
7930                 -type => 'text/xml',
7931                 -charset => 'utf-8',
7932                 -content_disposition => 'inline; filename="opml.xml"');
7933
7934         my $title = esc_html($site_name);
7935         my $filter = " within subdirectory ";
7936         if (defined $project_filter) {
7937                 $filter .= esc_html($project_filter);
7938         } else {
7939                 $filter = "";
7940         }
7941         print <<XML;
7942 <?xml version="1.0" encoding="utf-8"?>
7943 <opml version="1.0">
7944 <head>
7945   <title>$title OPML Export$filter</title>
7946 </head>
7947 <body>
7948 <outline text="git RSS feeds">
7949 XML
7950
7951         foreach my $pr (@list) {
7952                 my %proj = %$pr;
7953                 my $head = git_get_head_hash($proj{'path'});
7954                 if (!defined $head) {
7955                         next;
7956                 }
7957                 $git_dir = "$projectroot/$proj{'path'}";
7958                 my %co = parse_commit($head);
7959                 if (!%co) {
7960                         next;
7961                 }
7962
7963                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7964                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7965                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7966                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7967         }
7968         print <<XML;
7969 </outline>
7970 </body>
7971 </opml>
7972 XML
7973 }