gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         # this must be last entry (for manipulation from JavaScript)
 764         javascript => "js"
 765 );
 766 our %cgi_param_mapping = @cgi_param_mapping;
 767
 768 # we will also need to know the possible actions, for validation
 769 our %actions = (
 770         "blame" => \&git_blame,
 771         "blame_incremental" => \&git_blame_incremental,
 772         "blame_data" => \&git_blame_data,
 773         "blobdiff" => \&git_blobdiff,
 774         "blobdiff_plain" => \&git_blobdiff_plain,
 775         "blob" => \&git_blob,
 776         "blob_plain" => \&git_blob_plain,
 777         "commitdiff" => \&git_commitdiff,
 778         "commitdiff_plain" => \&git_commitdiff_plain,
 779         "commit" => \&git_commit,
 780         "forks" => \&git_forks,
 781         "heads" => \&git_heads,
 782         "history" => \&git_history,
 783         "log" => \&git_log,
 784         "patch" => \&git_patch,
 785         "patches" => \&git_patches,
 786         "remotes" => \&git_remotes,
 787         "rss" => \&git_rss,
 788         "atom" => \&git_atom,
 789         "search" => \&git_search,
 790         "search_help" => \&git_search_help,
 791         "shortlog" => \&git_shortlog,
 792         "summary" => \&git_summary,
 793         "tag" => \&git_tag,
 794         "tags" => \&git_tags,
 795         "tree" => \&git_tree,
 796         "snapshot" => \&git_snapshot,
 797         "object" => \&git_object,
 798         # those below don't need $project
 799         "opml" => \&git_opml,
 800         "project_list" => \&git_project_list,
 801         "project_index" => \&git_project_index,
 802 );
 803
 804 # finally, we have the hash of allowed extra_options for the commands that
 805 # allow them
 806 our %allowed_options = (
 807         "--no-merges" => [ qw(rss atom log shortlog history) ],
 808 );
 809
 810 # fill %input_params with the CGI parameters. All values except for 'opt'
 811 # should be single values, but opt can be an array. We should probably
 812 # build an array of parameters that can be multi-valued, but since for the time
 813 # being it's only this one, we just single it out
 814 sub evaluate_query_params {
 815         our $cgi;
 816
 817         while (my ($name, $symbol) = each %cgi_param_mapping) {
 818                 if ($symbol eq 'opt') {
 819                         $input_params{$name} = [ $cgi->param($symbol) ];
 820                 } else {
 821                         $input_params{$name} = $cgi->param($symbol);
 822                 }
 823         }
 824 }
 825
 826 # now read PATH_INFO and update the parameter list for missing parameters
 827 sub evaluate_path_info {
 828         return if defined $input_params{'project'};
 829         return if !$path_info;
 830         $path_info =~ s,^/+,,;
 831         return if !$path_info;
 832
 833         # find which part of PATH_INFO is project
 834         my $project = $path_info;
 835         $project =~ s,/+$,,;
 836         while ($project && !check_head_link("$projectroot/$project")) {
 837                 $project =~ s,/*[^/]*$,,;
 838         }
 839         return unless $project;
 840         $input_params{'project'} = $project;
 841
 842         # do not change any parameters if an action is given using the query string
 843         return if $input_params{'action'};
 844         $path_info =~ s,^\Q$project\E/*,,;
 845
 846         # next, check if we have an action
 847         my $action = $path_info;
 848         $action =~ s,/.*$,,;
 849         if (exists $actions{$action}) {
 850                 $path_info =~ s,^$action/*,,;
 851                 $input_params{'action'} = $action;
 852         }
 853
 854         # list of actions that want hash_base instead of hash, but can have no
 855         # pathname (f) parameter
 856         my @wants_base = (
 857                 'tree',
 858                 'history',
 859         );
 860
 861         # we want to catch, among others
 862         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 863         my ($parentrefname, $parentpathname, $refname, $pathname) =
 864                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 865
 866         # first, analyze the 'current' part
 867         if (defined $pathname) {
 868                 # we got "branch:filename" or "branch:dir/"
 869                 # we could use git_get_type(branch:pathname), but:
 870                 # - it needs $git_dir
 871                 # - it does a git() call
 872                 # - the convention of terminating directories with a slash
 873                 #   makes it superfluous
 874                 # - embedding the action in the PATH_INFO would make it even
 875                 #   more superfluous
 876                 $pathname =~ s,^/+,,;
 877                 if (!$pathname || substr($pathname, -1) eq "/") {
 878                         $input_params{'action'} ||= "tree";
 879                         $pathname =~ s,/$,,;
 880                 } else {
 881                         # the default action depends on whether we had parent info
 882                         # or not
 883                         if ($parentrefname) {
 884                                 $input_params{'action'} ||= "blobdiff_plain";
 885                         } else {
 886                                 $input_params{'action'} ||= "blob_plain";
 887                         }
 888                 }
 889                 $input_params{'hash_base'} ||= $refname;
 890                 $input_params{'file_name'} ||= $pathname;
 891         } elsif (defined $refname) {
 892                 # we got "branch". In this case we have to choose if we have to
 893                 # set hash or hash_base.
 894                 #
 895                 # Most of the actions without a pathname only want hash to be
 896                 # set, except for the ones specified in @wants_base that want
 897                 # hash_base instead. It should also be noted that hand-crafted
 898                 # links having 'history' as an action and no pathname or hash
 899                 # set will fail, but that happens regardless of PATH_INFO.
 900                 if (defined $parentrefname) {
 901                         # if there is parent let the default be 'shortlog' action
 902                         # (for http://git.example.com/repo.git/A..B links); if there
 903                         # is no parent, dispatch will detect type of object and set
 904                         # action appropriately if required (if action is not set)
 905                         $input_params{'action'} ||= "shortlog";
 906                 }
 907                 if ($input_params{'action'} &&
 908                     grep { $_ eq $input_params{'action'} } @wants_base) {
 909                         $input_params{'hash_base'} ||= $refname;
 910                 } else {
 911                         $input_params{'hash'} ||= $refname;
 912                 }
 913         }
 914
 915         # next, handle the 'parent' part, if present
 916         if (defined $parentrefname) {
 917                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 918                 # someproject/blobdiff/oldrev..newrev:/filename
 919                 if ($parentpathname) {
 920                         $parentpathname =~ s,^/+,,;
 921                         $parentpathname =~ s,/$,,;
 922                         $input_params{'file_parent'} ||= $parentpathname;
 923                 } else {
 924                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 925                 }
 926                 # we assume that hash_parent_base is wanted if a path was specified,
 927                 # or if the action wants hash_base instead of hash
 928                 if (defined $input_params{'file_parent'} ||
 929                         grep { $_ eq $input_params{'action'} } @wants_base) {
 930                         $input_params{'hash_parent_base'} ||= $parentrefname;
 931                 } else {
 932                         $input_params{'hash_parent'} ||= $parentrefname;
 933                 }
 934         }
 935
 936         # for the snapshot action, we allow URLs in the form
 937         # $project/snapshot/$hash.ext
 938         # where .ext determines the snapshot and gets removed from the
 939         # passed $refname to provide the $hash.
 940         #
 941         # To be able to tell that $refname includes the format extension, we
 942         # require the following two conditions to be satisfied:
 943         # - the hash input parameter MUST have been set from the $refname part
 944         #   of the URL (i.e. they must be equal)
 945         # - the snapshot format MUST NOT have been defined already (e.g. from
 946         #   CGI parameter sf)
 947         # It's also useless to try any matching unless $refname has a dot,
 948         # so we check for that too
 949         if (defined $input_params{'action'} &&
 950                 $input_params{'action'} eq 'snapshot' &&
 951                 defined $refname && index($refname, '.') != -1 &&
 952                 $refname eq $input_params{'hash'} &&
 953                 !defined $input_params{'snapshot_format'}) {
 954                 # We loop over the known snapshot formats, checking for
 955                 # extensions. Allowed extensions are both the defined suffix
 956                 # (which includes the initial dot already) and the snapshot
 957                 # format key itself, with a prepended dot
 958                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 959                         my $hash = $refname;
 960                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 961                                 next;
 962                         }
 963                         my $sfx = $1;
 964                         # a valid suffix was found, so set the snapshot format
 965                         # and reset the hash parameter
 966                         $input_params{'snapshot_format'} = $fmt;
 967                         $input_params{'hash'} = $hash;
 968                         # we also set the format suffix to the one requested
 969                         # in the URL: this way a request for e.g. .tgz returns
 970                         # a .tgz instead of a .tar.gz
 971                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 972                         last;
 973                 }
 974         }
 975 }
 976
 977 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 978      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 979      $searchtext, $search_regexp);
 980 sub evaluate_and_validate_params {
 981         our $action = $input_params{'action'};
 982         if (defined $action) {
 983                 if (!validate_action($action)) {
 984                         die_error(400, "Invalid action parameter");
 985                 }
 986         }
 987
 988         # parameters which are pathnames
 989         our $project = $input_params{'project'};
 990         if (defined $project) {
 991                 if (!validate_project($project)) {
 992                         undef $project;
 993                         die_error(404, "No such project");
 994                 }
 995         }
 996
 997         our $file_name = $input_params{'file_name'};
 998         if (defined $file_name) {
 999                 if (!validate_pathname($file_name)) {
1000                         die_error(400, "Invalid file parameter");
1001                 }
1002         }
1003
1004         our $file_parent = $input_params{'file_parent'};
1005         if (defined $file_parent) {
1006                 if (!validate_pathname($file_parent)) {
1007                         die_error(400, "Invalid file parent parameter");
1008                 }
1009         }
1010
1011         # parameters which are refnames
1012         our $hash = $input_params{'hash'};
1013         if (defined $hash) {
1014                 if (!validate_refname($hash)) {
1015                         die_error(400, "Invalid hash parameter");
1016                 }
1017         }
1018
1019         our $hash_parent = $input_params{'hash_parent'};
1020         if (defined $hash_parent) {
1021                 if (!validate_refname($hash_parent)) {
1022                         die_error(400, "Invalid hash parent parameter");
1023                 }
1024         }
1025
1026         our $hash_base = $input_params{'hash_base'};
1027         if (defined $hash_base) {
1028                 if (!validate_refname($hash_base)) {
1029                         die_error(400, "Invalid hash base parameter");
1030                 }
1031         }
1032
1033         our @extra_options = @{$input_params{'extra_options'}};
1034         # @extra_options is always defined, since it can only be (currently) set from
1035         # CGI, and $cgi->param() returns the empty array in array context if the param
1036         # is not set
1037         foreach my $opt (@extra_options) {
1038                 if (not exists $allowed_options{$opt}) {
1039                         die_error(400, "Invalid option parameter");
1040                 }
1041                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1042                         die_error(400, "Invalid option parameter for this action");
1043                 }
1044         }
1045
1046         our $hash_parent_base = $input_params{'hash_parent_base'};
1047         if (defined $hash_parent_base) {
1048                 if (!validate_refname($hash_parent_base)) {
1049                         die_error(400, "Invalid hash parent base parameter");
1050                 }
1051         }
1052
1053         # other parameters
1054         our $page = $input_params{'page'};
1055         if (defined $page) {
1056                 if ($page =~ m/[^0-9]/) {
1057                         die_error(400, "Invalid page parameter");
1058                 }
1059         }
1060
1061         our $searchtype = $input_params{'searchtype'};
1062         if (defined $searchtype) {
1063                 if ($searchtype =~ m/[^a-z]/) {
1064                         die_error(400, "Invalid searchtype parameter");
1065                 }
1066         }
1067
1068         our $search_use_regexp = $input_params{'search_use_regexp'};
1069
1070         our $searchtext = $input_params{'searchtext'};
1071         our $search_regexp;
1072         if (defined $searchtext) {
1073                 if (length($searchtext) < 2) {
1074                         die_error(403, "At least two characters are required for search parameter");
1075                 }
1076                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1077         }
1078 }
1079
1080 # path to the current git repository
1081 our $git_dir;
1082 sub evaluate_git_dir {
1083         our $git_dir = "$projectroot/$project" if $project;
1084 }
1085
1086 our (@snapshot_fmts, $git_avatar);
1087 sub configure_gitweb_features {
1088         # list of supported snapshot formats
1089         our @snapshot_fmts = gitweb_get_feature('snapshot');
1090         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1091
1092         # check that the avatar feature is set to a known provider name,
1093         # and for each provider check if the dependencies are satisfied.
1094         # if the provider name is invalid or the dependencies are not met,
1095         # reset $git_avatar to the empty string.
1096         our ($git_avatar) = gitweb_get_feature('avatar');
1097         if ($git_avatar eq 'gravatar') {
1098                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1099         } elsif ($git_avatar eq 'picon') {
1100                 # no dependencies
1101         } else {
1102                 $git_avatar = '';
1103         }
1104 }
1105
1106 # custom error handler: 'die <message>' is Internal Server Error
1107 sub handle_errors_html {
1108         my $msg = shift; # it is already HTML escaped
1109
1110         # to avoid infinite loop where error occurs in die_error,
1111         # change handler to default handler, disabling handle_errors_html
1112         set_message("Error occured when inside die_error:\n$msg");
1113
1114         # you cannot jump out of die_error when called as error handler;
1115         # the subroutine set via CGI::Carp::set_message is called _after_
1116         # HTTP headers are already written, so it cannot write them itself
1117         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1118 }
1119 set_message(\&handle_errors_html);
1120
1121 # dispatch
1122 sub dispatch {
1123         if (!defined $action) {
1124                 if (defined $hash) {
1125                         $action = git_get_type($hash);
1126                 } elsif (defined $hash_base && defined $file_name) {
1127                         $action = git_get_type("$hash_base:$file_name");
1128                 } elsif (defined $project) {
1129                         $action = 'summary';
1130                 } else {
1131                         $action = 'project_list';
1132                 }
1133         }
1134         if (!defined($actions{$action})) {
1135                 die_error(400, "Unknown action");
1136         }
1137         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1138             !$project) {
1139                 die_error(400, "Project needed");
1140         }
1141         $actions{$action}->();
1142 }
1143
1144 sub reset_timer {
1145         our $t0 = [ gettimeofday() ]
1146                 if defined $t0;
1147         our $number_of_git_cmds = 0;
1148 }
1149
1150 our $first_request = 1;
1151 sub run_request {
1152         reset_timer();
1153
1154         evaluate_uri();
1155         if ($first_request) {
1156                 evaluate_gitweb_config();
1157                 evaluate_git_version();
1158         }
1159         if ($per_request_config) {
1160                 if (ref($per_request_config) eq 'CODE') {
1161                         $per_request_config->();
1162                 } elsif (!$first_request) {
1163                         evaluate_gitweb_config();
1164                 }
1165         }
1166         check_loadavg();
1167
1168         # $projectroot and $projects_list might be set in gitweb config file
1169         $projects_list ||= $projectroot;
1170
1171         evaluate_query_params();
1172         evaluate_path_info();
1173         evaluate_and_validate_params();
1174         evaluate_git_dir();
1175
1176         configure_gitweb_features();
1177
1178         dispatch();
1179 }
1180
1181 our $is_last_request = sub { 1 };
1182 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1183 our $CGI = 'CGI';
1184 our $cgi;
1185 sub configure_as_fcgi {
1186         require CGI::Fast;
1187         our $CGI = 'CGI::Fast';
1188
1189         my $request_number = 0;
1190         # let each child service 100 requests
1191         our $is_last_request = sub { ++$request_number > 100 };
1192 }
1193 sub evaluate_argv {
1194         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1195         configure_as_fcgi()
1196                 if $script_name =~ /\.fcgi$/;
1197
1198         return unless (@ARGV);
1199
1200         require Getopt::Long;
1201         Getopt::Long::GetOptions(
1202                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1203                 'nproc|n=i' => sub {
1204                         my ($arg, $val) = @_;
1205                         return unless eval { require FCGI::ProcManager; 1; };
1206                         my $proc_manager = FCGI::ProcManager->new({
1207                                 n_processes => $val,
1208                         });
1209                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1210                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1211                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1212                 },
1213         );
1214 }
1215
1216 sub run {
1217         evaluate_argv();
1218
1219         $first_request = 1;
1220         $pre_listen_hook->()
1221                 if $pre_listen_hook;
1222
1223  REQUEST:
1224         while ($cgi = $CGI->new()) {
1225                 $pre_dispatch_hook->()
1226                         if $pre_dispatch_hook;
1227
1228                 run_request();
1229
1230                 $post_dispatch_hook->()
1231                         if $post_dispatch_hook;
1232                 $first_request = 0;
1233
1234                 last REQUEST if ($is_last_request->());
1235         }
1236
1237  DONE_GITWEB:
1238         1;
1239 }
1240
1241 run();
1242
1243 if (defined caller) {
1244         # wrapped in a subroutine processing requests,
1245         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1246         return;
1247 } else {
1248         # pure CGI script, serving single request
1249         exit;
1250 }
1251
1252 ## ======================================================================
1253 ## action links
1254
1255 # possible values of extra options
1256 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1257 # -replay => 1      - start from a current view (replay with modifications)
1258 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1259 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1260 sub href {
1261         my %params = @_;
1262         # default is to use -absolute url() i.e. $my_uri
1263         my $href = $params{-full} ? $my_url : $my_uri;
1264
1265         # implicit -replay, must be first of implicit params
1266         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1267
1268         $params{'project'} = $project unless exists $params{'project'};
1269
1270         if ($params{-replay}) {
1271                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1272                         if (!exists $params{$name}) {
1273                                 $params{$name} = $input_params{$name};
1274                         }
1275                 }
1276         }
1277
1278         my $use_pathinfo = gitweb_check_feature('pathinfo');
1279         if (defined $params{'project'} &&
1280             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1281                 # try to put as many parameters as possible in PATH_INFO:
1282                 #   - project name
1283                 #   - action
1284                 #   - hash_parent or hash_parent_base:/file_parent
1285                 #   - hash or hash_base:/filename
1286                 #   - the snapshot_format as an appropriate suffix
1287
1288                 # When the script is the root DirectoryIndex for the domain,
1289                 # $href here would be something like http://gitweb.example.com/
1290                 # Thus, we strip any trailing / from $href, to spare us double
1291                 # slashes in the final URL
1292                 $href =~ s,/$,,;
1293
1294                 # Then add the project name, if present
1295                 $href .= "/".esc_path_info($params{'project'});
1296                 delete $params{'project'};
1297
1298                 # since we destructively absorb parameters, we keep this
1299                 # boolean that remembers if we're handling a snapshot
1300                 my $is_snapshot = $params{'action'} eq 'snapshot';
1301
1302                 # Summary just uses the project path URL, any other action is
1303                 # added to the URL
1304                 if (defined $params{'action'}) {
1305                         $href .= "/".esc_path_info($params{'action'})
1306                                 unless $params{'action'} eq 'summary';
1307                         delete $params{'action'};
1308                 }
1309
1310                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1311                 # stripping nonexistent or useless pieces
1312                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1313                         || $params{'hash_parent'} || $params{'hash'});
1314                 if (defined $params{'hash_base'}) {
1315                         if (defined $params{'hash_parent_base'}) {
1316                                 $href .= esc_path_info($params{'hash_parent_base'});
1317                                 # skip the file_parent if it's the same as the file_name
1318                                 if (defined $params{'file_parent'}) {
1319                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1320                                                 delete $params{'file_parent'};
1321                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1322                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1323                                                 delete $params{'file_parent'};
1324                                         }
1325                                 }
1326                                 $href .= "..";
1327                                 delete $params{'hash_parent'};
1328                                 delete $params{'hash_parent_base'};
1329                         } elsif (defined $params{'hash_parent'}) {
1330                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1331                                 delete $params{'hash_parent'};
1332                         }
1333
1334                         $href .= esc_path_info($params{'hash_base'});
1335                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1336                                 $href .= ":/".esc_path_info($params{'file_name'});
1337                                 delete $params{'file_name'};
1338                         }
1339                         delete $params{'hash'};
1340                         delete $params{'hash_base'};
1341                 } elsif (defined $params{'hash'}) {
1342                         $href .= esc_path_info($params{'hash'});
1343                         delete $params{'hash'};
1344                 }
1345
1346                 # If the action was a snapshot, we can absorb the
1347                 # snapshot_format parameter too
1348                 if ($is_snapshot) {
1349                         my $fmt = $params{'snapshot_format'};
1350                         # snapshot_format should always be defined when href()
1351                         # is called, but just in case some code forgets, we
1352                         # fall back to the default
1353                         $fmt ||= $snapshot_fmts[0];
1354                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1355                         delete $params{'snapshot_format'};
1356                 }
1357         }
1358
1359         # now encode the parameters explicitly
1360         my @result = ();
1361         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1362                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1363                 if (defined $params{$name}) {
1364                         if (ref($params{$name}) eq "ARRAY") {
1365                                 foreach my $par (@{$params{$name}}) {
1366                                         push @result, $symbol . "=" . esc_param($par);
1367                                 }
1368                         } else {
1369                                 push @result, $symbol . "=" . esc_param($params{$name});
1370                         }
1371                 }
1372         }
1373         $href .= "?" . join(';', @result) if scalar @result;
1374
1375         # final transformation: trailing spaces must be escaped (URI-encoded)
1376         $href =~ s/(\s+)$/CGI::escape($1)/e;
1377
1378         if ($params{-anchor}) {
1379                 $href .= "#".esc_param($params{-anchor});
1380         }
1381
1382         return $href;
1383 }
1384
1385
1386 ## ======================================================================
1387 ## validation, quoting/unquoting and escaping
1388
1389 sub validate_action {
1390         my $input = shift || return undef;
1391         return undef unless exists $actions{$input};
1392         return $input;
1393 }
1394
1395 sub validate_project {
1396         my $input = shift || return undef;
1397         if (!validate_pathname($input) ||
1398                 !(-d "$projectroot/$input") ||
1399                 !check_export_ok("$projectroot/$input") ||
1400                 ($strict_export && !project_in_list($input))) {
1401                 return undef;
1402         } else {
1403                 return $input;
1404         }
1405 }
1406
1407 sub validate_pathname {
1408         my $input = shift || return undef;
1409
1410         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1411         # at the beginning, at the end, and between slashes.
1412         # also this catches doubled slashes
1413         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1414                 return undef;
1415         }
1416         # no null characters
1417         if ($input =~ m!\0!) {
1418                 return undef;
1419         }
1420         return $input;
1421 }
1422
1423 sub validate_refname {
1424         my $input = shift || return undef;
1425
1426         # textual hashes are O.K.
1427         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1428                 return $input;
1429         }
1430         # it must be correct pathname
1431         $input = validate_pathname($input)
1432                 or return undef;
1433         # restrictions on ref name according to git-check-ref-format
1434         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1435                 return undef;
1436         }
1437         return $input;
1438 }
1439
1440 # decode sequences of octets in utf8 into Perl's internal form,
1441 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1442 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1443 sub to_utf8 {
1444         my $str = shift;
1445         return undef unless defined $str;
1446
1447         if (utf8::is_utf8($str) || utf8::decode($str)) {
1448                 return $str;
1449         } else {
1450                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1451         }
1452 }
1453
1454 # quote unsafe chars, but keep the slash, even when it's not
1455 # correct, but quoted slashes look too horrible in bookmarks
1456 sub esc_param {
1457         my $str = shift;
1458         return undef unless defined $str;
1459         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1460         $str =~ s/ /\+/g;
1461         return $str;
1462 }
1463
1464 # the quoting rules for path_info fragment are slightly different
1465 sub esc_path_info {
1466         my $str = shift;
1467         return undef unless defined $str;
1468
1469         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1470         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1471
1472         return $str;
1473 }
1474
1475 # quote unsafe chars in whole URL, so some characters cannot be quoted
1476 sub esc_url {
1477         my $str = shift;
1478         return undef unless defined $str;
1479         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1480         $str =~ s/ /\+/g;
1481         return $str;
1482 }
1483
1484 # quote unsafe characters in HTML attributes
1485 sub esc_attr {
1486
1487         # for XHTML conformance escaping '"' to '&quot;' is not enough
1488         return esc_html(@_);
1489 }
1490
1491 # replace invalid utf8 character with SUBSTITUTION sequence
1492 sub esc_html {
1493         my $str = shift;
1494         my %opts = @_;
1495
1496         return undef unless defined $str;
1497
1498         $str = to_utf8($str);
1499         $str = $cgi->escapeHTML($str);
1500         if ($opts{'-nbsp'}) {
1501                 $str =~ s/ /&nbsp;/g;
1502         }
1503         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1504         return $str;
1505 }
1506
1507 # quote control characters and escape filename to HTML
1508 sub esc_path {
1509         my $str = shift;
1510         my %opts = @_;
1511
1512         return undef unless defined $str;
1513
1514         $str = to_utf8($str);
1515         $str = $cgi->escapeHTML($str);
1516         if ($opts{'-nbsp'}) {
1517                 $str =~ s/ /&nbsp;/g;
1518         }
1519         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1520         return $str;
1521 }
1522
1523 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1524 sub sanitize {
1525         my $str = shift;
1526
1527         return undef unless defined $str;
1528
1529         $str = to_utf8($str);
1530         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1531         return $str;
1532 }
1533
1534 # Make control characters "printable", using character escape codes (CEC)
1535 sub quot_cec {
1536         my $cntrl = shift;
1537         my %opts = @_;
1538         my %es = ( # character escape codes, aka escape sequences
1539                 "\t" => '\t',   # tab            (HT)
1540                 "\n" => '\n',   # line feed      (LF)
1541                 "\r" => '\r',   # carrige return (CR)
1542                 "\f" => '\f',   # form feed      (FF)
1543                 "\b" => '\b',   # backspace      (BS)
1544                 "\a" => '\a',   # alarm (bell)   (BEL)
1545                 "\e" => '\e',   # escape         (ESC)
1546                 "\013" => '\v', # vertical tab   (VT)
1547                 "\000" => '\0', # nul character  (NUL)
1548         );
1549         my $chr = ( (exists $es{$cntrl})
1550                     ? $es{$cntrl}
1551                     : sprintf('\%2x', ord($cntrl)) );
1552         if ($opts{-nohtml}) {
1553                 return $chr;
1554         } else {
1555                 return "<span class=\"cntrl\">$chr</span>";
1556         }
1557 }
1558
1559 # Alternatively use unicode control pictures codepoints,
1560 # Unicode "printable representation" (PR)
1561 sub quot_upr {
1562         my $cntrl = shift;
1563         my %opts = @_;
1564
1565         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1566         if ($opts{-nohtml}) {
1567                 return $chr;
1568         } else {
1569                 return "<span class=\"cntrl\">$chr</span>";
1570         }
1571 }
1572
1573 # git may return quoted and escaped filenames
1574 sub unquote {
1575         my $str = shift;
1576
1577         sub unq {
1578                 my $seq = shift;
1579                 my %es = ( # character escape codes, aka escape sequences
1580                         't' => "\t",   # tab            (HT, TAB)
1581                         'n' => "\n",   # newline        (NL)
1582                         'r' => "\r",   # return         (CR)
1583                         'f' => "\f",   # form feed      (FF)
1584                         'b' => "\b",   # backspace      (BS)
1585                         'a' => "\a",   # alarm (bell)   (BEL)
1586                         'e' => "\e",   # escape         (ESC)
1587                         'v' => "\013", # vertical tab   (VT)
1588                 );
1589
1590                 if ($seq =~ m/^[0-7]{1,3}$/) {
1591                         # octal char sequence
1592                         return chr(oct($seq));
1593                 } elsif (exists $es{$seq}) {
1594                         # C escape sequence, aka character escape code
1595                         return $es{$seq};
1596                 }
1597                 # quoted ordinary character
1598                 return $seq;
1599         }
1600
1601         if ($str =~ m/^"(.*)"$/) {
1602                 # needs unquoting
1603                 $str = $1;
1604                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1605         }
1606         return $str;
1607 }
1608
1609 # escape tabs (convert tabs to spaces)
1610 sub untabify {
1611         my $line = shift;
1612
1613         while ((my $pos = index($line, "\t")) != -1) {
1614                 if (my $count = (8 - ($pos % 8))) {
1615                         my $spaces = ' ' x $count;
1616                         $line =~ s/\t/$spaces/;
1617                 }
1618         }
1619
1620         return $line;
1621 }
1622
1623 sub project_in_list {
1624         my $project = shift;
1625         my @list = git_get_projects_list();
1626         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1627 }
1628
1629 ## ----------------------------------------------------------------------
1630 ## HTML aware string manipulation
1631
1632 # Try to chop given string on a word boundary between position
1633 # $len and $len+$add_len. If there is no word boundary there,
1634 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1635 # (marking chopped part) would be longer than given string.
1636 sub chop_str {
1637         my $str = shift;
1638         my $len = shift;
1639         my $add_len = shift || 10;
1640         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1641
1642         # Make sure perl knows it is utf8 encoded so we don't
1643         # cut in the middle of a utf8 multibyte char.
1644         $str = to_utf8($str);
1645
1646         # allow only $len chars, but don't cut a word if it would fit in $add_len
1647         # if it doesn't fit, cut it if it's still longer than the dots we would add
1648         # remove chopped character entities entirely
1649
1650         # when chopping in the middle, distribute $len into left and right part
1651         # return early if chopping wouldn't make string shorter
1652         if ($where eq 'center') {
1653                 return $str if ($len + 5 >= length($str)); # filler is length 5
1654                 $len = int($len/2);
1655         } else {
1656                 return $str if ($len + 4 >= length($str)); # filler is length 4
1657         }
1658
1659         # regexps: ending and beginning with word part up to $add_len
1660         my $endre = qr/.{$len}\w{0,$add_len}/;
1661         my $begre = qr/\w{0,$add_len}.{$len}/;
1662
1663         if ($where eq 'left') {
1664                 $str =~ m/^(.*?)($begre)$/;
1665                 my ($lead, $body) = ($1, $2);
1666                 if (length($lead) > 4) {
1667                         $lead = " ...";
1668                 }
1669                 return "$lead$body";
1670
1671         } elsif ($where eq 'center') {
1672                 $str =~ m/^($endre)(.*)$/;
1673                 my ($left, $str)  = ($1, $2);
1674                 $str =~ m/^(.*?)($begre)$/;
1675                 my ($mid, $right) = ($1, $2);
1676                 if (length($mid) > 5) {
1677                         $mid = " ... ";
1678                 }
1679                 return "$left$mid$right";
1680
1681         } else {
1682                 $str =~ m/^($endre)(.*)$/;
1683                 my $body = $1;
1684                 my $tail = $2;
1685                 if (length($tail) > 4) {
1686                         $tail = "... ";
1687                 }
1688                 return "$body$tail";
1689         }
1690 }
1691
1692 # takes the same arguments as chop_str, but also wraps a <span> around the
1693 # result with a title attribute if it does get chopped. Additionally, the
1694 # string is HTML-escaped.
1695 sub chop_and_escape_str {
1696         my ($str) = @_;
1697
1698         my $chopped = chop_str(@_);
1699         $str = to_utf8($str);
1700         if ($chopped eq $str) {
1701                 return esc_html($chopped);
1702         } else {
1703                 $str =~ s/[[:cntrl:]]/?/g;
1704                 return $cgi->span({-title=>$str}, esc_html($chopped));
1705         }
1706 }
1707
1708 ## ----------------------------------------------------------------------
1709 ## functions returning short strings
1710
1711 # CSS class for given age value (in seconds)
1712 sub age_class {
1713         my $age = shift;
1714
1715         if (!defined $age) {
1716                 return "noage";
1717         } elsif ($age < 60*60*2) {
1718                 return "age0";
1719         } elsif ($age < 60*60*24*2) {
1720                 return "age1";
1721         } else {
1722                 return "age2";
1723         }
1724 }
1725
1726 # convert age in seconds to "nn units ago" string
1727 sub age_string {
1728         my $age = shift;
1729         my $age_str;
1730
1731         if ($age > 60*60*24*365*2) {
1732                 $age_str = (int $age/60/60/24/365);
1733                 $age_str .= " years ago";
1734         } elsif ($age > 60*60*24*(365/12)*2) {
1735                 $age_str = int $age/60/60/24/(365/12);
1736                 $age_str .= " months ago";
1737         } elsif ($age > 60*60*24*7*2) {
1738                 $age_str = int $age/60/60/24/7;
1739                 $age_str .= " weeks ago";
1740         } elsif ($age > 60*60*24*2) {
1741                 $age_str = int $age/60/60/24;
1742                 $age_str .= " days ago";
1743         } elsif ($age > 60*60*2) {
1744                 $age_str = int $age/60/60;
1745                 $age_str .= " hours ago";
1746         } elsif ($age > 60*2) {
1747                 $age_str = int $age/60;
1748                 $age_str .= " min ago";
1749         } elsif ($age > 2) {
1750                 $age_str = int $age;
1751                 $age_str .= " sec ago";
1752         } else {
1753                 $age_str .= " right now";
1754         }
1755         return $age_str;
1756 }
1757
1758 use constant {
1759         S_IFINVALID => 0030000,
1760         S_IFGITLINK => 0160000,
1761 };
1762
1763 # submodule/subproject, a commit object reference
1764 sub S_ISGITLINK {
1765         my $mode = shift;
1766
1767         return (($mode & S_IFMT) == S_IFGITLINK)
1768 }
1769
1770 # convert file mode in octal to symbolic file mode string
1771 sub mode_str {
1772         my $mode = oct shift;
1773
1774         if (S_ISGITLINK($mode)) {
1775                 return 'm---------';
1776         } elsif (S_ISDIR($mode & S_IFMT)) {
1777                 return 'drwxr-xr-x';
1778         } elsif (S_ISLNK($mode)) {
1779                 return 'lrwxrwxrwx';
1780         } elsif (S_ISREG($mode)) {
1781                 # git cares only about the executable bit
1782                 if ($mode & S_IXUSR) {
1783                         return '-rwxr-xr-x';
1784                 } else {
1785                         return '-rw-r--r--';
1786                 };
1787         } else {
1788                 return '----------';
1789         }
1790 }
1791
1792 # convert file mode in octal to file type string
1793 sub file_type {
1794         my $mode = shift;
1795
1796         if ($mode !~ m/^[0-7]+$/) {
1797                 return $mode;
1798         } else {
1799                 $mode = oct $mode;
1800         }
1801
1802         if (S_ISGITLINK($mode)) {
1803                 return "submodule";
1804         } elsif (S_ISDIR($mode & S_IFMT)) {
1805                 return "directory";
1806         } elsif (S_ISLNK($mode)) {
1807                 return "symlink";
1808         } elsif (S_ISREG($mode)) {
1809                 return "file";
1810         } else {
1811                 return "unknown";
1812         }
1813 }
1814
1815 # convert file mode in octal to file type description string
1816 sub file_type_long {
1817         my $mode = shift;
1818
1819         if ($mode !~ m/^[0-7]+$/) {
1820                 return $mode;
1821         } else {
1822                 $mode = oct $mode;
1823         }
1824
1825         if (S_ISGITLINK($mode)) {
1826                 return "submodule";
1827         } elsif (S_ISDIR($mode & S_IFMT)) {
1828                 return "directory";
1829         } elsif (S_ISLNK($mode)) {
1830                 return "symlink";
1831         } elsif (S_ISREG($mode)) {
1832                 if ($mode & S_IXUSR) {
1833                         return "executable";
1834                 } else {
1835                         return "file";
1836                 };
1837         } else {
1838                 return "unknown";
1839         }
1840 }
1841
1842
1843 ## ----------------------------------------------------------------------
1844 ## functions returning short HTML fragments, or transforming HTML fragments
1845 ## which don't belong to other sections
1846
1847 # format line of commit message.
1848 sub format_log_line_html {
1849         my $line = shift;
1850
1851         $line = esc_html($line, -nbsp=>1);
1852         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1853                 $cgi->a({-href => href(action=>"object", hash=>$1),
1854                                         -class => "text"}, $1);
1855         }eg;
1856
1857         return $line;
1858 }
1859
1860 # format marker of refs pointing to given object
1861
1862 # the destination action is chosen based on object type and current context:
1863 # - for annotated tags, we choose the tag view unless it's the current view
1864 #   already, in which case we go to shortlog view
1865 # - for other refs, we keep the current view if we're in history, shortlog or
1866 #   log view, and select shortlog otherwise
1867 sub format_ref_marker {
1868         my ($refs, $id) = @_;
1869         my $markers = '';
1870
1871         if (defined $refs->{$id}) {
1872                 foreach my $ref (@{$refs->{$id}}) {
1873                         # this code exploits the fact that non-lightweight tags are the
1874                         # only indirect objects, and that they are the only objects for which
1875                         # we want to use tag instead of shortlog as action
1876                         my ($type, $name) = qw();
1877                         my $indirect = ($ref =~ s/\^\{\}$//);
1878                         # e.g. tags/v2.6.11 or heads/next
1879                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1880                                 $type = $1;
1881                                 $name = $2;
1882                         } else {
1883                                 $type = "ref";
1884                                 $name = $ref;
1885                         }
1886
1887                         my $class = $type;
1888                         $class .= " indirect" if $indirect;
1889
1890                         my $dest_action = "shortlog";
1891
1892                         if ($indirect) {
1893                                 $dest_action = "tag" unless $action eq "tag";
1894                         } elsif ($action =~ /^(history|(short)?log)$/) {
1895                                 $dest_action = $action;
1896                         }
1897
1898                         my $dest = "";
1899                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1900                         $dest .= $ref;
1901
1902                         my $link = $cgi->a({
1903                                 -href => href(
1904                                         action=>$dest_action,
1905                                         hash=>$dest
1906                                 )}, $name);
1907
1908                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1909                                 $link . "</span>";
1910                 }
1911         }
1912
1913         if ($markers) {
1914                 return ' <span class="refs">'. $markers . '</span>';
1915         } else {
1916                 return "";
1917         }
1918 }
1919
1920 # format, perhaps shortened and with markers, title line
1921 sub format_subject_html {
1922         my ($long, $short, $href, $extra) = @_;
1923         $extra = '' unless defined($extra);
1924
1925         if (length($short) < length($long)) {
1926                 $long =~ s/[[:cntrl:]]/?/g;
1927                 return $cgi->a({-href => $href, -class => "list subject",
1928                                 -title => to_utf8($long)},
1929                        esc_html($short)) . $extra;
1930         } else {
1931                 return $cgi->a({-href => $href, -class => "list subject"},
1932                        esc_html($long)) . $extra;
1933         }
1934 }
1935
1936 # Rather than recomputing the url for an email multiple times, we cache it
1937 # after the first hit. This gives a visible benefit in views where the avatar
1938 # for the same email is used repeatedly (e.g. shortlog).
1939 # The cache is shared by all avatar engines (currently gravatar only), which
1940 # are free to use it as preferred. Since only one avatar engine is used for any
1941 # given page, there's no risk for cache conflicts.
1942 our %avatar_cache = ();
1943
1944 # Compute the picon url for a given email, by using the picon search service over at
1945 # http://www.cs.indiana.edu/picons/search.html
1946 sub picon_url {
1947         my $email = lc shift;
1948         if (!$avatar_cache{$email}) {
1949                 my ($user, $domain) = split('@', $email);
1950                 $avatar_cache{$email} =
1951                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1952                         "$domain/$user/" .
1953                         "users+domains+unknown/up/single";
1954         }
1955         return $avatar_cache{$email};
1956 }
1957
1958 # Compute the gravatar url for a given email, if it's not in the cache already.
1959 # Gravatar stores only the part of the URL before the size, since that's the
1960 # one computationally more expensive. This also allows reuse of the cache for
1961 # different sizes (for this particular engine).
1962 sub gravatar_url {
1963         my $email = lc shift;
1964         my $size = shift;
1965         $avatar_cache{$email} ||=
1966                 "http://www.gravatar.com/avatar/" .
1967                         Digest::MD5::md5_hex($email) . "?s=";
1968         return $avatar_cache{$email} . $size;
1969 }
1970
1971 # Insert an avatar for the given $email at the given $size if the feature
1972 # is enabled.
1973 sub git_get_avatar {
1974         my ($email, %opts) = @_;
1975         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1976         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1977         $opts{-size} ||= 'default';
1978         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1979         my $url = "";
1980         if ($git_avatar eq 'gravatar') {
1981                 $url = gravatar_url($email, $size);
1982         } elsif ($git_avatar eq 'picon') {
1983                 $url = picon_url($email);
1984         }
1985         # Other providers can be added by extending the if chain, defining $url
1986         # as needed. If no variant puts something in $url, we assume avatars
1987         # are completely disabled/unavailable.
1988         if ($url) {
1989                 return $pre_white .
1990                        "<img width=\"$size\" " .
1991                             "class=\"avatar\" " .
1992                             "src=\"".esc_url($url)."\" " .
1993                             "alt=\"\" " .
1994                        "/>" . $post_white;
1995         } else {
1996                 return "";
1997         }
1998 }
1999
2000 sub format_search_author {
2001         my ($author, $searchtype, $displaytext) = @_;
2002         my $have_search = gitweb_check_feature('search');
2003
2004         if ($have_search) {
2005                 my $performed = "";
2006                 if ($searchtype eq 'author') {
2007                         $performed = "authored";
2008                 } elsif ($searchtype eq 'committer') {
2009                         $performed = "committed";
2010                 }
2011
2012                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2013                                 searchtext=>$author,
2014                                 searchtype=>$searchtype), class=>"list",
2015                                 title=>"Search for commits $performed by $author"},
2016                                 $displaytext);
2017
2018         } else {
2019                 return $displaytext;
2020         }
2021 }
2022
2023 # format the author name of the given commit with the given tag
2024 # the author name is chopped and escaped according to the other
2025 # optional parameters (see chop_str).
2026 sub format_author_html {
2027         my $tag = shift;
2028         my $co = shift;
2029         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2030         return "<$tag class=\"author\">" .
2031                format_search_author($co->{'author_name'}, "author",
2032                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2033                        $author) .
2034                "</$tag>";
2035 }
2036
2037 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2038 sub format_git_diff_header_line {
2039         my $line = shift;
2040         my $diffinfo = shift;
2041         my ($from, $to) = @_;
2042
2043         if ($diffinfo->{'nparents'}) {
2044                 # combined diff
2045                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2046                 if ($to->{'href'}) {
2047                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2048                                          esc_path($to->{'file'}));
2049                 } else { # file was deleted (no href)
2050                         $line .= esc_path($to->{'file'});
2051                 }
2052         } else {
2053                 # "ordinary" diff
2054                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2055                 if ($from->{'href'}) {
2056                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2057                                          'a/' . esc_path($from->{'file'}));
2058                 } else { # file was added (no href)
2059                         $line .= 'a/' . esc_path($from->{'file'});
2060                 }
2061                 $line .= ' ';
2062                 if ($to->{'href'}) {
2063                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2064                                          'b/' . esc_path($to->{'file'}));
2065                 } else { # file was deleted
2066                         $line .= 'b/' . esc_path($to->{'file'});
2067                 }
2068         }
2069
2070         return "<div class=\"diff header\">$line</div>\n";
2071 }
2072
2073 # format extended diff header line, before patch itself
2074 sub format_extended_diff_header_line {
2075         my $line = shift;
2076         my $diffinfo = shift;
2077         my ($from, $to) = @_;
2078
2079         # match <path>
2080         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2081                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2082                                        esc_path($from->{'file'}));
2083         }
2084         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2085                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2086                                  esc_path($to->{'file'}));
2087         }
2088         # match single <mode>
2089         if ($line =~ m/\s(\d{6})$/) {
2090                 $line .= '<span class="info"> (' .
2091                          file_type_long($1) .
2092                          ')</span>';
2093         }
2094         # match <hash>
2095         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2096                 # can match only for combined diff
2097                 $line = 'index ';
2098                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2099                         if ($from->{'href'}[$i]) {
2100                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2101                                                   -class=>"hash"},
2102                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2103                         } else {
2104                                 $line .= '0' x 7;
2105                         }
2106                         # separator
2107                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2108                 }
2109                 $line .= '..';
2110                 if ($to->{'href'}) {
2111                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2112                                          substr($diffinfo->{'to_id'},0,7));
2113                 } else {
2114                         $line .= '0' x 7;
2115                 }
2116
2117         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2118                 # can match only for ordinary diff
2119                 my ($from_link, $to_link);
2120                 if ($from->{'href'}) {
2121                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2122                                              substr($diffinfo->{'from_id'},0,7));
2123                 } else {
2124                         $from_link = '0' x 7;
2125                 }
2126                 if ($to->{'href'}) {
2127                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2128                                            substr($diffinfo->{'to_id'},0,7));
2129                 } else {
2130                         $to_link = '0' x 7;
2131                 }
2132                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2133                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2134         }
2135
2136         return $line . "<br/>\n";
2137 }
2138
2139 # format from-file/to-file diff header
2140 sub format_diff_from_to_header {
2141         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2142         my $line;
2143         my $result = '';
2144
2145         $line = $from_line;
2146         #assert($line =~ m/^---/) if DEBUG;
2147         # no extra formatting for "^--- /dev/null"
2148         if (! $diffinfo->{'nparents'}) {
2149                 # ordinary (single parent) diff
2150                 if ($line =~ m!^--- "?a/!) {
2151                         if ($from->{'href'}) {
2152                                 $line = '--- a/' .
2153                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2154                                                 esc_path($from->{'file'}));
2155                         } else {
2156                                 $line = '--- a/' .
2157                                         esc_path($from->{'file'});
2158                         }
2159                 }
2160                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2161
2162         } else {
2163                 # combined diff (merge commit)
2164                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2165                         if ($from->{'href'}[$i]) {
2166                                 $line = '--- ' .
2167                                         $cgi->a({-href=>href(action=>"blobdiff",
2168                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2169                                                              hash_parent_base=>$parents[$i],
2170                                                              file_parent=>$from->{'file'}[$i],
2171                                                              hash=>$diffinfo->{'to_id'},
2172                                                              hash_base=>$hash,
2173                                                              file_name=>$to->{'file'}),
2174                                                  -class=>"path",
2175                                                  -title=>"diff" . ($i+1)},
2176                                                 $i+1) .
2177                                         '/' .
2178                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2179                                                 esc_path($from->{'file'}[$i]));
2180                         } else {
2181                                 $line = '--- /dev/null';
2182                         }
2183                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2184                 }
2185         }
2186
2187         $line = $to_line;
2188         #assert($line =~ m/^\+\+\+/) if DEBUG;
2189         # no extra formatting for "^+++ /dev/null"
2190         if ($line =~ m!^\+\+\+ "?b/!) {
2191                 if ($to->{'href'}) {
2192                         $line = '+++ b/' .
2193                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2194                                         esc_path($to->{'file'}));
2195                 } else {
2196                         $line = '+++ b/' .
2197                                 esc_path($to->{'file'});
2198                 }
2199         }
2200         $result .= qq!<div class="diff to_file">$line</div>\n!;
2201
2202         return $result;
2203 }
2204
2205 # create note for patch simplified by combined diff
2206 sub format_diff_cc_simplified {
2207         my ($diffinfo, @parents) = @_;
2208         my $result = '';
2209
2210         $result .= "<div class=\"diff header\">" .
2211                    "diff --cc ";
2212         if (!is_deleted($diffinfo)) {
2213                 $result .= $cgi->a({-href => href(action=>"blob",
2214                                                   hash_base=>$hash,
2215                                                   hash=>$diffinfo->{'to_id'},
2216                                                   file_name=>$diffinfo->{'to_file'}),
2217                                     -class => "path"},
2218                                    esc_path($diffinfo->{'to_file'}));
2219         } else {
2220                 $result .= esc_path($diffinfo->{'to_file'});
2221         }
2222         $result .= "</div>\n" . # class="diff header"
2223                    "<div class=\"diff nodifferences\">" .
2224                    "Simple merge" .
2225                    "</div>\n"; # class="diff nodifferences"
2226
2227         return $result;
2228 }
2229
2230 sub diff_line_class {
2231         my ($line, $from, $to) = @_;
2232
2233         # ordinary diff
2234         my $num_sign = 1;
2235         # combined diff
2236         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2237                 $num_sign = scalar @{$from->{'href'}};
2238         }
2239
2240         my @diff_line_classifier = (
2241                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2242                 { regexp => qr/^\\/,               class => "incomplete"  },
2243                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2244                 # classifier for context must come before classifier add/rem,
2245                 # or we would have to use more complicated regexp, for example
2246                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2247                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2248                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2249         );
2250         for my $clsfy (@diff_line_classifier) {
2251                 return $clsfy->{'class'}
2252                         if ($line =~ $clsfy->{'regexp'});
2253         }
2254
2255         # fallback
2256         return "";
2257 }
2258
2259 # assumes that $from and $to are defined and correctly filled,
2260 # and that $line holds a line of chunk header for unified diff
2261 sub format_unidiff_chunk_header {
2262         my ($line, $from, $to) = @_;
2263
2264         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2265                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2266
2267         $from_lines = 0 unless defined $from_lines;
2268         $to_lines   = 0 unless defined $to_lines;
2269
2270         if ($from->{'href'}) {
2271                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2272                                      -class=>"list"}, $from_text);
2273         }
2274         if ($to->{'href'}) {
2275                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2276                                      -class=>"list"}, $to_text);
2277         }
2278         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2279                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2280         return $line;
2281 }
2282
2283 # assumes that $from and $to are defined and correctly filled,
2284 # and that $line holds a line of chunk header for combined diff
2285 sub format_cc_diff_chunk_header {
2286         my ($line, $from, $to) = @_;
2287
2288         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2289         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2290
2291         @from_text = split(' ', $ranges);
2292         for (my $i = 0; $i < @from_text; ++$i) {
2293                 ($from_start[$i], $from_nlines[$i]) =
2294                         (split(',', substr($from_text[$i], 1)), 0);
2295         }
2296
2297         $to_text   = pop @from_text;
2298         $to_start  = pop @from_start;
2299         $to_nlines = pop @from_nlines;
2300
2301         $line = "<span class=\"chunk_info\">$prefix ";
2302         for (my $i = 0; $i < @from_text; ++$i) {
2303                 if ($from->{'href'}[$i]) {
2304                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2305                                           -class=>"list"}, $from_text[$i]);
2306                 } else {
2307                         $line .= $from_text[$i];
2308                 }
2309                 $line .= " ";
2310         }
2311         if ($to->{'href'}) {
2312                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2313                                   -class=>"list"}, $to_text);
2314         } else {
2315                 $line .= $to_text;
2316         }
2317         $line .= " $prefix</span>" .
2318                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2319         return $line;
2320 }
2321
2322 # process patch (diff) line (not to be used for diff headers),
2323 # returning class and HTML-formatted (but not wrapped) line
2324 sub process_diff_line {
2325         my $line = shift;
2326         my ($from, $to) = @_;
2327
2328         my $diff_class = diff_line_class($line, $from, $to);
2329
2330         chomp $line;
2331         $line = untabify($line);
2332
2333         if ($from && $to && $line =~ m/^\@{2} /) {
2334                 $line = format_unidiff_chunk_header($line, $from, $to);
2335                 return $diff_class, $line;
2336
2337         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2338                 $line = format_cc_diff_chunk_header($line, $from, $to);
2339                 return $diff_class, $line;
2340
2341         }
2342         return $diff_class, esc_html($line, -nbsp=>1);
2343 }
2344
2345 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2346 # linked.  Pass the hash of the tree/commit to snapshot.
2347 sub format_snapshot_links {
2348         my ($hash) = @_;
2349         my $num_fmts = @snapshot_fmts;
2350         if ($num_fmts > 1) {
2351                 # A parenthesized list of links bearing format names.
2352                 # e.g. "snapshot (_tar.gz_ _zip_)"
2353                 return "snapshot (" . join(' ', map
2354                         $cgi->a({
2355                                 -href => href(
2356                                         action=>"snapshot",
2357                                         hash=>$hash,
2358                                         snapshot_format=>$_
2359                                 )
2360                         }, $known_snapshot_formats{$_}{'display'})
2361                 , @snapshot_fmts) . ")";
2362         } elsif ($num_fmts == 1) {
2363                 # A single "snapshot" link whose tooltip bears the format name.
2364                 # i.e. "_snapshot_"
2365                 my ($fmt) = @snapshot_fmts;
2366                 return
2367                         $cgi->a({
2368                                 -href => href(
2369                                         action=>"snapshot",
2370                                         hash=>$hash,
2371                                         snapshot_format=>$fmt
2372                                 ),
2373                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2374                         }, "snapshot");
2375         } else { # $num_fmts == 0
2376                 return undef;
2377         }
2378 }
2379
2380 ## ......................................................................
2381 ## functions returning values to be passed, perhaps after some
2382 ## transformation, to other functions; e.g. returning arguments to href()
2383
2384 # returns hash to be passed to href to generate gitweb URL
2385 # in -title key it returns description of link
2386 sub get_feed_info {
2387         my $format = shift || 'Atom';
2388         my %res = (action => lc($format));
2389
2390         # feed links are possible only for project views
2391         return unless (defined $project);
2392         # some views should link to OPML, or to generic project feed,
2393         # or don't have specific feed yet (so they should use generic)
2394         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2395
2396         my $branch;
2397         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2398         # from tag links; this also makes possible to detect branch links
2399         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2400             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2401                 $branch = $1;
2402         }
2403         # find log type for feed description (title)
2404         my $type = 'log';
2405         if (defined $file_name) {
2406                 $type  = "history of $file_name";
2407                 $type .= "/" if ($action eq 'tree');
2408                 $type .= " on '$branch'" if (defined $branch);
2409         } else {
2410                 $type = "log of $branch" if (defined $branch);
2411         }
2412
2413         $res{-title} = $type;
2414         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2415         $res{'file_name'} = $file_name;
2416
2417         return %res;
2418 }
2419
2420 ## ----------------------------------------------------------------------
2421 ## git utility subroutines, invoking git commands
2422
2423 # returns path to the core git executable and the --git-dir parameter as list
2424 sub git_cmd {
2425         $number_of_git_cmds++;
2426         return $GIT, '--git-dir='.$git_dir;
2427 }
2428
2429 # quote the given arguments for passing them to the shell
2430 # quote_command("command", "arg 1", "arg with ' and ! characters")
2431 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2432 # Try to avoid using this function wherever possible.
2433 sub quote_command {
2434         return join(' ',
2435                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2436 }
2437
2438 # get HEAD ref of given project as hash
2439 sub git_get_head_hash {
2440         return git_get_full_hash(shift, 'HEAD');
2441 }
2442
2443 sub git_get_full_hash {
2444         return git_get_hash(@_);
2445 }
2446
2447 sub git_get_short_hash {
2448         return git_get_hash(@_, '--short=7');
2449 }
2450
2451 sub git_get_hash {
2452         my ($project, $hash, @options) = @_;
2453         my $o_git_dir = $git_dir;
2454         my $retval = undef;
2455         $git_dir = "$projectroot/$project";
2456         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2457             '--verify', '-q', @options, $hash) {
2458                 $retval = <$fd>;
2459                 chomp $retval if defined $retval;
2460                 close $fd;
2461         }
2462         if (defined $o_git_dir) {
2463                 $git_dir = $o_git_dir;
2464         }
2465         return $retval;
2466 }
2467
2468 # get type of given object
2469 sub git_get_type {
2470         my $hash = shift;
2471
2472         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2473         my $type = <$fd>;
2474         close $fd or return;
2475         chomp $type;
2476         return $type;
2477 }
2478
2479 # repository configuration
2480 our $config_file = '';
2481 our %config;
2482
2483 # store multiple values for single key as anonymous array reference
2484 # single values stored directly in the hash, not as [ <value> ]
2485 sub hash_set_multi {
2486         my ($hash, $key, $value) = @_;
2487
2488         if (!exists $hash->{$key}) {
2489                 $hash->{$key} = $value;
2490         } elsif (!ref $hash->{$key}) {
2491                 $hash->{$key} = [ $hash->{$key}, $value ];
2492         } else {
2493                 push @{$hash->{$key}}, $value;
2494         }
2495 }
2496
2497 # return hash of git project configuration
2498 # optionally limited to some section, e.g. 'gitweb'
2499 sub git_parse_project_config {
2500         my $section_regexp = shift;
2501         my %config;
2502
2503         local $/ = "\0";
2504
2505         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2506                 or return;
2507
2508         while (my $keyval = <$fh>) {
2509                 chomp $keyval;
2510                 my ($key, $value) = split(/\n/, $keyval, 2);
2511
2512                 hash_set_multi(\%config, $key, $value)
2513                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2514         }
2515         close $fh;
2516
2517         return %config;
2518 }
2519
2520 # convert config value to boolean: 'true' or 'false'
2521 # no value, number > 0, 'true' and 'yes' values are true
2522 # rest of values are treated as false (never as error)
2523 sub config_to_bool {
2524         my $val = shift;
2525
2526         return 1 if !defined $val;             # section.key
2527
2528         # strip leading and trailing whitespace
2529         $val =~ s/^\s+//;
2530         $val =~ s/\s+$//;
2531
2532         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2533                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2534 }
2535
2536 # convert config value to simple decimal number
2537 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2538 # to be multiplied by 1024, 1048576, or 1073741824
2539 sub config_to_int {
2540         my $val = shift;
2541
2542         # strip leading and trailing whitespace
2543         $val =~ s/^\s+//;
2544         $val =~ s/\s+$//;
2545
2546         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2547                 $unit = lc($unit);
2548                 # unknown unit is treated as 1
2549                 return $num * ($unit eq 'g' ? 1073741824 :
2550                                $unit eq 'm' ?    1048576 :
2551                                $unit eq 'k' ?       1024 : 1);
2552         }
2553         return $val;
2554 }
2555
2556 # convert config value to array reference, if needed
2557 sub config_to_multi {
2558         my $val = shift;
2559
2560         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2561 }
2562
2563 sub git_get_project_config {
2564         my ($key, $type) = @_;
2565
2566         return unless defined $git_dir;
2567
2568         # key sanity check
2569         return unless ($key);
2570         # only subsection, if exists, is case sensitive,
2571         # and not lowercased by 'git config -z -l'
2572         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2573                 $key = join(".", lc($hi), $mi, lc($lo));
2574         } else {
2575                 $key = lc($key);
2576         }
2577         $key =~ s/^gitweb\.//;
2578         return if ($key =~ m/\W/);
2579
2580         # type sanity check
2581         if (defined $type) {
2582                 $type =~ s/^--//;
2583                 $type = undef
2584                         unless ($type eq 'bool' || $type eq 'int');
2585         }
2586
2587         # get config
2588         if (!defined $config_file ||
2589             $config_file ne "$git_dir/config") {
2590                 %config = git_parse_project_config('gitweb');
2591                 $config_file = "$git_dir/config";
2592         }
2593
2594         # check if config variable (key) exists
2595         return unless exists $config{"gitweb.$key"};
2596
2597         # ensure given type
2598         if (!defined $type) {
2599                 return $config{"gitweb.$key"};
2600         } elsif ($type eq 'bool') {
2601                 # backward compatibility: 'git config --bool' returns true/false
2602                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2603         } elsif ($type eq 'int') {
2604                 return config_to_int($config{"gitweb.$key"});
2605         }
2606         return $config{"gitweb.$key"};
2607 }
2608
2609 # get hash of given path at given ref
2610 sub git_get_hash_by_path {
2611         my $base = shift;
2612         my $path = shift || return undef;
2613         my $type = shift;
2614
2615         $path =~ s,/+$,,;
2616
2617         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2618                 or die_error(500, "Open git-ls-tree failed");
2619         my $line = <$fd>;
2620         close $fd or return undef;
2621
2622         if (!defined $line) {
2623                 # there is no tree or hash given by $path at $base
2624                 return undef;
2625         }
2626
2627         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2628         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2629         if (defined $type && $type ne $2) {
2630                 # type doesn't match
2631                 return undef;
2632         }
2633         return $3;
2634 }
2635
2636 # get path of entry with given hash at given tree-ish (ref)
2637 # used to get 'from' filename for combined diff (merge commit) for renames
2638 sub git_get_path_by_hash {
2639         my $base = shift || return;
2640         my $hash = shift || return;
2641
2642         local $/ = "\0";
2643
2644         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2645                 or return undef;
2646         while (my $line = <$fd>) {
2647                 chomp $line;
2648
2649                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2650                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2651                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2652                         close $fd;
2653                         return $1;
2654                 }
2655         }
2656         close $fd;
2657         return undef;
2658 }
2659
2660 ## ......................................................................
2661 ## git utility functions, directly accessing git repository
2662
2663 # get the value of config variable either from file named as the variable
2664 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2665 # configuration variable in the repository config file.
2666 sub git_get_file_or_project_config {
2667         my ($path, $name) = @_;
2668
2669         $git_dir = "$projectroot/$path";
2670         open my $fd, '<', "$git_dir/$name"
2671                 or return git_get_project_config($name);
2672         my $conf = <$fd>;
2673         close $fd;
2674         if (defined $conf) {
2675                 chomp $conf;
2676         }
2677         return $conf;
2678 }
2679
2680 sub git_get_project_description {
2681         my $path = shift;
2682         return git_get_file_or_project_config($path, 'description');
2683 }
2684
2685 sub git_get_project_category {
2686         my $path = shift;
2687         return git_get_file_or_project_config($path, 'category');
2688 }
2689
2690
2691 # supported formats:
2692 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2693 #   - if its contents is a number, use it as tag weight,
2694 #   - otherwise add a tag with weight 1
2695 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2696 #   the same value multiple times increases tag weight
2697 # * `gitweb.ctag' multi-valued repo config variable
2698 sub git_get_project_ctags {
2699         my $project = shift;
2700         my $ctags = {};
2701
2702         $git_dir = "$projectroot/$project";
2703         if (opendir my $dh, "$git_dir/ctags") {
2704                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2705                 foreach my $tagfile (@files) {
2706                         open my $ct, '<', $tagfile
2707                                 or next;
2708                         my $val = <$ct>;
2709                         chomp $val if $val;
2710                         close $ct;
2711
2712                         (my $ctag = $tagfile) =~ s#.*/##;
2713                         if ($val =~ /^\d+$/) {
2714                                 $ctags->{$ctag} = $val;
2715                         } else {
2716                                 $ctags->{$ctag} = 1;
2717                         }
2718                 }
2719                 closedir $dh;
2720
2721         } elsif (open my $fh, '<', "$git_dir/ctags") {
2722                 while (my $line = <$fh>) {
2723                         chomp $line;
2724                         $ctags->{$line}++ if $line;
2725                 }
2726                 close $fh;
2727
2728         } else {
2729                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2730                 foreach my $tag (@$taglist) {
2731                         $ctags->{$tag}++;
2732                 }
2733         }
2734
2735         return $ctags;
2736 }
2737
2738 # return hash, where keys are content tags ('ctags'),
2739 # and values are sum of weights of given tag in every project
2740 sub git_gather_all_ctags {
2741         my $projects = shift;
2742         my $ctags = {};
2743
2744         foreach my $p (@$projects) {
2745                 foreach my $ct (keys %{$p->{'ctags'}}) {
2746                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2747                 }
2748         }
2749
2750         return $ctags;
2751 }
2752
2753 sub git_populate_project_tagcloud {
2754         my $ctags = shift;
2755
2756         # First, merge different-cased tags; tags vote on casing
2757         my %ctags_lc;
2758         foreach (keys %$ctags) {
2759                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2760                 if (not $ctags_lc{lc $_}->{topcount}
2761                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2762                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2763                         $ctags_lc{lc $_}->{topname} = $_;
2764                 }
2765         }
2766
2767         my $cloud;
2768         my $matched = $cgi->param('by_tag');
2769         if (eval { require HTML::TagCloud; 1; }) {
2770                 $cloud = HTML::TagCloud->new;
2771                 foreach my $ctag (sort keys %ctags_lc) {
2772                         # Pad the title with spaces so that the cloud looks
2773                         # less crammed.
2774                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2775                         $title =~ s/ /&nbsp;/g;
2776                         $title =~ s/^/&nbsp;/g;
2777                         $title =~ s/$/&nbsp;/g;
2778                         if (defined $matched && $matched eq $ctag) {
2779                                 $title = qq(<span class="match">$title</span>);
2780                         }
2781                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2782                                     $ctags_lc{$ctag}->{count});
2783                 }
2784         } else {
2785                 $cloud = {};
2786                 foreach my $ctag (keys %ctags_lc) {
2787                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2788                         if (defined $matched && $matched eq $ctag) {
2789                                 $title = qq(<span class="match">$title</span>);
2790                         }
2791                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2792                         $cloud->{$ctag}{ctag} =
2793                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2794                 }
2795         }
2796         return $cloud;
2797 }
2798
2799 sub git_show_project_tagcloud {
2800         my ($cloud, $count) = @_;
2801         if (ref $cloud eq 'HTML::TagCloud') {
2802                 return $cloud->html_and_css($count);
2803         } else {
2804                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2805                 return
2806                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2807                         join (', ', map {
2808                                 $cloud->{$_}->{'ctag'}
2809                         } splice(@tags, 0, $count)) .
2810                         '</div>';
2811         }
2812 }
2813
2814 sub git_get_project_url_list {
2815         my $path = shift;
2816
2817         $git_dir = "$projectroot/$path";
2818         open my $fd, '<', "$git_dir/cloneurl"
2819                 or return wantarray ?
2820                 @{ config_to_multi(git_get_project_config('url')) } :
2821                    config_to_multi(git_get_project_config('url'));
2822         my @git_project_url_list = map { chomp; $_ } <$fd>;
2823         close $fd;
2824
2825         return wantarray ? @git_project_url_list : \@git_project_url_list;
2826 }
2827
2828 sub git_get_projects_list {
2829         my $filter = shift || '';
2830         my @list;
2831
2832         $filter =~ s/\.git$//;
2833
2834         if (-d $projects_list) {
2835                 # search in directory
2836                 my $dir = $projects_list;
2837                 # remove the trailing "/"
2838                 $dir =~ s!/+$!!;
2839                 my $pfxlen = length("$dir");
2840                 my $pfxdepth = ($dir =~ tr!/!!);
2841                 # when filtering, search only given subdirectory
2842                 if ($filter) {
2843                         $dir .= "/$filter";
2844                         $dir =~ s!/+$!!;
2845                 }
2846
2847                 File::Find::find({
2848                         follow_fast => 1, # follow symbolic links
2849                         follow_skip => 2, # ignore duplicates
2850                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2851                         wanted => sub {
2852                                 # global variables
2853                                 our $project_maxdepth;
2854                                 our $projectroot;
2855                                 # skip project-list toplevel, if we get it.
2856                                 return if (m!^[/.]$!);
2857                                 # only directories can be git repositories
2858                                 return unless (-d $_);
2859                                 # don't traverse too deep (Find is super slow on os x)
2860                                 # $project_maxdepth excludes depth of $projectroot
2861                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2862                                         $File::Find::prune = 1;
2863                                         return;
2864                                 }
2865
2866                                 my $path = substr($File::Find::name, $pfxlen + 1);
2867                                 # we check related file in $projectroot
2868                                 if (check_export_ok("$projectroot/$path")) {
2869                                         push @list, { path => $path };
2870                                         $File::Find::prune = 1;
2871                                 }
2872                         },
2873                 }, "$dir");
2874
2875         } elsif (-f $projects_list) {
2876                 # read from file(url-encoded):
2877                 # 'git%2Fgit.git Linus+Torvalds'
2878                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2879                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2880                 open my $fd, '<', $projects_list or return;
2881         PROJECT:
2882                 while (my $line = <$fd>) {
2883                         chomp $line;
2884                         my ($path, $owner) = split ' ', $line;
2885                         $path = unescape($path);
2886                         $owner = unescape($owner);
2887                         if (!defined $path) {
2888                                 next;
2889                         }
2890                         # if $filter is rpovided, check if $path begins with $filter
2891                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2892                                 next;
2893                         }
2894                         if (check_export_ok("$projectroot/$path")) {
2895                                 my $pr = {
2896                                         path => $path,
2897                                         owner => to_utf8($owner),
2898                                 };
2899                                 push @list, $pr;
2900                         }
2901                 }
2902                 close $fd;
2903         }
2904         return @list;
2905 }
2906
2907 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2908 # as side effects it sets 'forks' field to list of forks for forked projects
2909 sub filter_forks_from_projects_list {
2910         my $projects = shift;
2911
2912         my %trie; # prefix tree of directories (path components)
2913         # generate trie out of those directories that might contain forks
2914         foreach my $pr (@$projects) {
2915                 my $path = $pr->{'path'};
2916                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2917                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2918                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2919                 next unless (-d "$projectroot/$path"); # containing directory exists
2920                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2921
2922                 # add to trie
2923                 my @dirs = split('/', $path);
2924                 # walk the trie, until either runs out of components or out of trie
2925                 my $ref = \%trie;
2926                 while (scalar @dirs &&
2927                        exists($ref->{$dirs[0]})) {
2928                         $ref = $ref->{shift @dirs};
2929                 }
2930                 # create rest of trie structure from rest of components
2931                 foreach my $dir (@dirs) {
2932                         $ref = $ref->{$dir} = {};
2933                 }
2934                 # create end marker, store $pr as a data
2935                 $ref->{''} = $pr if (!exists $ref->{''});
2936         }
2937
2938         # filter out forks, by finding shortest prefix match for paths
2939         my @filtered;
2940  PROJECT:
2941         foreach my $pr (@$projects) {
2942                 # trie lookup
2943                 my $ref = \%trie;
2944         DIR:
2945                 foreach my $dir (split('/', $pr->{'path'})) {
2946                         if (exists $ref->{''}) {
2947                                 # found [shortest] prefix, is a fork - skip it
2948                                 push @{$ref->{''}{'forks'}}, $pr;
2949                                 next PROJECT;
2950                         }
2951                         if (!exists $ref->{$dir}) {
2952                                 # not in trie, cannot have prefix, not a fork
2953                                 push @filtered, $pr;
2954                                 next PROJECT;
2955                         }
2956                         # If the dir is there, we just walk one step down the trie.
2957                         $ref = $ref->{$dir};
2958                 }
2959                 # we ran out of trie
2960                 # (shouldn't happen: it's either no match, or end marker)
2961                 push @filtered, $pr;
2962         }
2963
2964         return @filtered;
2965 }
2966
2967 # note: fill_project_list_info must be run first,
2968 # for 'descr_long' and 'ctags' to be filled
2969 sub search_projects_list {
2970         my ($projlist, %opts) = @_;
2971         my $tagfilter  = $opts{'tagfilter'};
2972         my $searchtext = $opts{'searchtext'};
2973
2974         return @$projlist
2975                 unless ($tagfilter || $searchtext);
2976
2977         my @projects;
2978  PROJECT:
2979         foreach my $pr (@$projlist) {
2980
2981                 if ($tagfilter) {
2982                         next unless ref($pr->{'ctags'}) eq 'HASH';
2983                         next unless
2984                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2985                 }
2986
2987                 if ($searchtext) {
2988                         next unless
2989                                 $pr->{'path'} =~ /$searchtext/ ||
2990                                 $pr->{'descr_long'} =~ /$searchtext/;
2991                 }
2992
2993                 push @projects, $pr;
2994         }
2995
2996         return @projects;
2997 }
2998
2999 our $gitweb_project_owner = undef;
3000 sub git_get_project_list_from_file {
3001
3002         return if (defined $gitweb_project_owner);
3003
3004         $gitweb_project_owner = {};
3005         # read from file (url-encoded):
3006         # 'git%2Fgit.git Linus+Torvalds'
3007         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3008         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3009         if (-f $projects_list) {
3010                 open(my $fd, '<', $projects_list);
3011                 while (my $line = <$fd>) {
3012                         chomp $line;
3013                         my ($pr, $ow) = split ' ', $line;
3014                         $pr = unescape($pr);
3015                         $ow = unescape($ow);
3016                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3017                 }
3018                 close $fd;
3019         }
3020 }
3021
3022 sub git_get_project_owner {
3023         my $project = shift;
3024         my $owner;
3025
3026         return undef unless $project;
3027         $git_dir = "$projectroot/$project";
3028
3029         if (!defined $gitweb_project_owner) {
3030                 git_get_project_list_from_file();
3031         }
3032
3033         if (exists $gitweb_project_owner->{$project}) {
3034                 $owner = $gitweb_project_owner->{$project};
3035         }
3036         if (!defined $owner){
3037                 $owner = git_get_project_config('owner');
3038         }
3039         if (!defined $owner) {
3040                 $owner = get_file_owner("$git_dir");
3041         }
3042
3043         return $owner;
3044 }
3045
3046 sub git_get_last_activity {
3047         my ($path) = @_;
3048         my $fd;
3049
3050         $git_dir = "$projectroot/$path";
3051         open($fd, "-|", git_cmd(), 'for-each-ref',
3052              '--format=%(committer)',
3053              '--sort=-committerdate',
3054              '--count=1',
3055              'refs/heads') or return;
3056         my $most_recent = <$fd>;
3057         close $fd or return;
3058         if (defined $most_recent &&
3059             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3060                 my $timestamp = $1;
3061                 my $age = time - $timestamp;
3062                 return ($age, age_string($age));
3063         }
3064         return (undef, undef);
3065 }
3066
3067 # Implementation note: when a single remote is wanted, we cannot use 'git
3068 # remote show -n' because that command always work (assuming it's a remote URL
3069 # if it's not defined), and we cannot use 'git remote show' because that would
3070 # try to make a network roundtrip. So the only way to find if that particular
3071 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3072 # and when we find what we want.
3073 sub git_get_remotes_list {
3074         my $wanted = shift;
3075         my %remotes = ();
3076
3077         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3078         return unless $fd;
3079         while (my $remote = <$fd>) {
3080                 chomp $remote;
3081                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3082                 next if $wanted and not $remote eq $wanted;
3083                 my ($url, $key) = ($1, $2);
3084
3085                 $remotes{$remote} ||= { 'heads' => () };
3086                 $remotes{$remote}{$key} = $url;
3087         }
3088         close $fd or return;
3089         return wantarray ? %remotes : \%remotes;
3090 }
3091
3092 # Takes a hash of remotes as first parameter and fills it by adding the
3093 # available remote heads for each of the indicated remotes.
3094 sub fill_remote_heads {
3095         my $remotes = shift;
3096         my @heads = map { "remotes/$_" } keys %$remotes;
3097         my @remoteheads = git_get_heads_list(undef, @heads);
3098         foreach my $remote (keys %$remotes) {
3099                 $remotes->{$remote}{'heads'} = [ grep {
3100                         $_->{'name'} =~ s!^$remote/!!
3101                         } @remoteheads ];
3102         }
3103 }
3104
3105 sub git_get_references {
3106         my $type = shift || "";
3107         my %refs;
3108         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3109         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3110         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3111                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3112                 or return;
3113
3114         while (my $line = <$fd>) {
3115                 chomp $line;
3116                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3117                         if (defined $refs{$1}) {
3118                                 push @{$refs{$1}}, $2;
3119                         } else {
3120                                 $refs{$1} = [ $2 ];
3121                         }
3122                 }
3123         }
3124         close $fd or return;
3125         return \%refs;
3126 }
3127
3128 sub git_get_rev_name_tags {
3129         my $hash = shift || return undef;
3130
3131         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3132                 or return;
3133         my $name_rev = <$fd>;
3134         close $fd;
3135
3136         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3137                 return $1;
3138         } else {
3139                 # catches also '$hash undefined' output
3140                 return undef;
3141         }
3142 }
3143
3144 ## ----------------------------------------------------------------------
3145 ## parse to hash functions
3146
3147 sub parse_date {
3148         my $epoch = shift;
3149         my $tz = shift || "-0000";
3150
3151         my %date;
3152         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3153         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3154         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3155         $date{'hour'} = $hour;
3156         $date{'minute'} = $min;
3157         $date{'mday'} = $mday;
3158         $date{'day'} = $days[$wday];
3159         $date{'month'} = $months[$mon];
3160         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3161                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3162         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3163                              $mday, $months[$mon], $hour ,$min;
3164         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3165                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3166
3167         my ($tz_sign, $tz_hour, $tz_min) =
3168                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3169         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3170         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3171         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3172         $date{'hour_local'} = $hour;
3173         $date{'minute_local'} = $min;
3174         $date{'tz_local'} = $tz;
3175         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3176                                   1900+$year, $mon+1, $mday,
3177                                   $hour, $min, $sec, $tz);
3178         return %date;
3179 }
3180
3181 sub parse_tag {
3182         my $tag_id = shift;
3183         my %tag;
3184         my @comment;
3185
3186         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3187         $tag{'id'} = $tag_id;
3188         while (my $line = <$fd>) {
3189                 chomp $line;
3190                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3191                         $tag{'object'} = $1;
3192                 } elsif ($line =~ m/^type (.+)$/) {
3193                         $tag{'type'} = $1;
3194                 } elsif ($line =~ m/^tag (.+)$/) {
3195                         $tag{'name'} = $1;
3196                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3197                         $tag{'author'} = $1;
3198                         $tag{'author_epoch'} = $2;
3199                         $tag{'author_tz'} = $3;
3200                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3201                                 $tag{'author_name'}  = $1;
3202                                 $tag{'author_email'} = $2;
3203                         } else {
3204                                 $tag{'author_name'} = $tag{'author'};
3205                         }
3206                 } elsif ($line =~ m/--BEGIN/) {
3207                         push @comment, $line;
3208                         last;
3209                 } elsif ($line eq "") {
3210                         last;
3211                 }
3212         }
3213         push @comment, <$fd>;
3214         $tag{'comment'} = \@comment;
3215         close $fd or return;
3216         if (!defined $tag{'name'}) {
3217                 return
3218         };
3219         return %tag
3220 }
3221
3222 sub parse_commit_text {
3223         my ($commit_text, $withparents) = @_;
3224         my @commit_lines = split '\n', $commit_text;
3225         my %co;
3226
3227         pop @commit_lines; # Remove '\0'
3228
3229         if (! @commit_lines) {
3230                 return;
3231         }
3232
3233         my $header = shift @commit_lines;
3234         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3235                 return;
3236         }
3237         ($co{'id'}, my @parents) = split ' ', $header;
3238         while (my $line = shift @commit_lines) {
3239                 last if $line eq "\n";
3240                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3241                         $co{'tree'} = $1;
3242                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3243                         push @parents, $1;
3244                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3245                         $co{'author'} = to_utf8($1);
3246                         $co{'author_epoch'} = $2;
3247                         $co{'author_tz'} = $3;
3248                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3249                                 $co{'author_name'}  = $1;
3250                                 $co{'author_email'} = $2;
3251                         } else {
3252                                 $co{'author_name'} = $co{'author'};
3253                         }
3254                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3255                         $co{'committer'} = to_utf8($1);
3256                         $co{'committer_epoch'} = $2;
3257                         $co{'committer_tz'} = $3;
3258                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3259                                 $co{'committer_name'}  = $1;
3260                                 $co{'committer_email'} = $2;
3261                         } else {
3262                                 $co{'committer_name'} = $co{'committer'};
3263                         }
3264                 }
3265         }
3266         if (!defined $co{'tree'}) {
3267                 return;
3268         };
3269         $co{'parents'} = \@parents;
3270         $co{'parent'} = $parents[0];
3271
3272         foreach my $title (@commit_lines) {
3273                 $title =~ s/^    //;
3274                 if ($title ne "") {
3275                         $co{'title'} = chop_str($title, 80, 5);
3276                         # remove leading stuff of merges to make the interesting part visible
3277                         if (length($title) > 50) {
3278                                 $title =~ s/^Automatic //;
3279                                 $title =~ s/^merge (of|with) /Merge ... /i;
3280                                 if (length($title) > 50) {
3281                                         $title =~ s/(http|rsync):\/\///;
3282                                 }
3283                                 if (length($title) > 50) {
3284                                         $title =~ s/(master|www|rsync)\.//;
3285                                 }
3286                                 if (length($title) > 50) {
3287                                         $title =~ s/kernel.org:?//;
3288                                 }
3289                                 if (length($title) > 50) {
3290                                         $title =~ s/\/pub\/scm//;
3291                                 }
3292                         }
3293                         $co{'title_short'} = chop_str($title, 50, 5);
3294                         last;
3295                 }
3296         }
3297         if (! defined $co{'title'} || $co{'title'} eq "") {
3298                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3299         }
3300         # remove added spaces
3301         foreach my $line (@commit_lines) {
3302                 $line =~ s/^    //;
3303         }
3304         $co{'comment'} = \@commit_lines;
3305
3306         my $age = time - $co{'committer_epoch'};
3307         $co{'age'} = $age;
3308         $co{'age_string'} = age_string($age);
3309         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3310         if ($age > 60*60*24*7*2) {
3311                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3312                 $co{'age_string_age'} = $co{'age_string'};
3313         } else {
3314                 $co{'age_string_date'} = $co{'age_string'};
3315                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3316         }
3317         return %co;
3318 }
3319
3320 sub parse_commit {
3321         my ($commit_id) = @_;
3322         my %co;
3323
3324         local $/ = "\0";
3325
3326         open my $fd, "-|", git_cmd(), "rev-list",
3327                 "--parents",
3328                 "--header",
3329                 "--max-count=1",
3330                 $commit_id,
3331                 "--",
3332                 or die_error(500, "Open git-rev-list failed");
3333         %co = parse_commit_text(<$fd>, 1);
3334         close $fd;
3335
3336         return %co;
3337 }
3338
3339 sub parse_commits {
3340         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3341         my @cos;
3342
3343         $maxcount ||= 1;
3344         $skip ||= 0;
3345
3346         local $/ = "\0";
3347
3348         open my $fd, "-|", git_cmd(), "rev-list",
3349                 "--header",
3350                 @args,
3351                 ("--max-count=" . $maxcount),
3352                 ("--skip=" . $skip),
3353                 @extra_options,
3354                 $commit_id,
3355                 "--",
3356                 ($filename ? ($filename) : ())
3357                 or die_error(500, "Open git-rev-list failed");
3358         while (my $line = <$fd>) {
3359                 my %co = parse_commit_text($line);
3360                 push @cos, \%co;
3361         }
3362         close $fd;
3363
3364         return wantarray ? @cos : \@cos;
3365 }
3366
3367 # parse line of git-diff-tree "raw" output
3368 sub parse_difftree_raw_line {
3369         my $line = shift;
3370         my %res;
3371
3372         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3373         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3374         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3375                 $res{'from_mode'} = $1;
3376                 $res{'to_mode'} = $2;
3377                 $res{'from_id'} = $3;
3378                 $res{'to_id'} = $4;
3379                 $res{'status'} = $5;
3380                 $res{'similarity'} = $6;
3381                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3382                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3383                 } else {
3384                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3385                 }
3386         }
3387         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3388         # combined diff (for merge commit)
3389         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3390                 $res{'nparents'}  = length($1);
3391                 $res{'from_mode'} = [ split(' ', $2) ];
3392                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3393                 $res{'from_id'} = [ split(' ', $3) ];
3394                 $res{'to_id'} = pop @{$res{'from_id'}};
3395                 $res{'status'} = [ split('', $4) ];
3396                 $res{'to_file'} = unquote($5);
3397         }
3398         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3399         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3400                 $res{'commit'} = $1;
3401         }
3402
3403         return wantarray ? %res : \%res;
3404 }
3405
3406 # wrapper: return parsed line of git-diff-tree "raw" output
3407 # (the argument might be raw line, or parsed info)
3408 sub parsed_difftree_line {
3409         my $line_or_ref = shift;
3410
3411         if (ref($line_or_ref) eq "HASH") {
3412                 # pre-parsed (or generated by hand)
3413                 return $line_or_ref;
3414         } else {
3415                 return parse_difftree_raw_line($line_or_ref);
3416         }
3417 }
3418
3419 # parse line of git-ls-tree output
3420 sub parse_ls_tree_line {
3421         my $line = shift;
3422         my %opts = @_;
3423         my %res;
3424
3425         if ($opts{'-l'}) {
3426                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3427                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3428
3429                 $res{'mode'} = $1;
3430                 $res{'type'} = $2;
3431                 $res{'hash'} = $3;
3432                 $res{'size'} = $4;
3433                 if ($opts{'-z'}) {
3434                         $res{'name'} = $5;
3435                 } else {
3436                         $res{'name'} = unquote($5);
3437                 }
3438         } else {
3439                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3440                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3441
3442                 $res{'mode'} = $1;
3443                 $res{'type'} = $2;
3444                 $res{'hash'} = $3;
3445                 if ($opts{'-z'}) {
3446                         $res{'name'} = $4;
3447                 } else {
3448                         $res{'name'} = unquote($4);
3449                 }
3450         }
3451
3452         return wantarray ? %res : \%res;
3453 }
3454
3455 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3456 sub parse_from_to_diffinfo {
3457         my ($diffinfo, $from, $to, @parents) = @_;
3458
3459         if ($diffinfo->{'nparents'}) {
3460                 # combined diff
3461                 $from->{'file'} = [];
3462                 $from->{'href'} = [];
3463                 fill_from_file_info($diffinfo, @parents)
3464                         unless exists $diffinfo->{'from_file'};
3465                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3466                         $from->{'file'}[$i] =
3467                                 defined $diffinfo->{'from_file'}[$i] ?
3468                                         $diffinfo->{'from_file'}[$i] :
3469                                         $diffinfo->{'to_file'};
3470                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3471                                 $from->{'href'}[$i] = href(action=>"blob",
3472                                                            hash_base=>$parents[$i],
3473                                                            hash=>$diffinfo->{'from_id'}[$i],
3474                                                            file_name=>$from->{'file'}[$i]);
3475                         } else {
3476                                 $from->{'href'}[$i] = undef;
3477                         }
3478                 }
3479         } else {
3480                 # ordinary (not combined) diff
3481                 $from->{'file'} = $diffinfo->{'from_file'};
3482                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3483                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3484                                                hash=>$diffinfo->{'from_id'},
3485                                                file_name=>$from->{'file'});
3486                 } else {
3487                         delete $from->{'href'};
3488                 }
3489         }
3490
3491         $to->{'file'} = $diffinfo->{'to_file'};
3492         if (!is_deleted($diffinfo)) { # file exists in result
3493                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3494                                      hash=>$diffinfo->{'to_id'},
3495                                      file_name=>$to->{'file'});
3496         } else {
3497                 delete $to->{'href'};
3498         }
3499 }
3500
3501 ## ......................................................................
3502 ## parse to array of hashes functions
3503
3504 sub git_get_heads_list {
3505         my ($limit, @classes) = @_;
3506         @classes = ('heads') unless @classes;
3507         my @patterns = map { "refs/$_" } @classes;
3508         my @headslist;
3509
3510         open my $fd, '-|', git_cmd(), 'for-each-ref',
3511                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3512                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3513                 @patterns
3514                 or return;
3515         while (my $line = <$fd>) {
3516                 my %ref_item;
3517
3518                 chomp $line;
3519                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3520                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3521                 my ($committer, $epoch, $tz) =
3522                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3523                 $ref_item{'fullname'}  = $name;
3524                 $name =~ s!^refs/(?:head|remote)s/!!;
3525
3526                 $ref_item{'name'}  = $name;
3527                 $ref_item{'id'}    = $hash;
3528                 $ref_item{'title'} = $title || '(no commit message)';
3529                 $ref_item{'epoch'} = $epoch;
3530                 if ($epoch) {
3531                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3532                 } else {
3533                         $ref_item{'age'} = "unknown";
3534                 }
3535
3536                 push @headslist, \%ref_item;
3537         }
3538         close $fd;
3539
3540         return wantarray ? @headslist : \@headslist;
3541 }
3542
3543 sub git_get_tags_list {
3544         my $limit = shift;
3545         my @tagslist;
3546
3547         open my $fd, '-|', git_cmd(), 'for-each-ref',
3548                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3549                 '--format=%(objectname) %(objecttype) %(refname) '.
3550                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3551                 'refs/tags'
3552                 or return;
3553         while (my $line = <$fd>) {
3554                 my %ref_item;
3555
3556                 chomp $line;
3557                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3558                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3559                 my ($creator, $epoch, $tz) =
3560                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3561                 $ref_item{'fullname'} = $name;
3562                 $name =~ s!^refs/tags/!!;
3563
3564                 $ref_item{'type'} = $type;
3565                 $ref_item{'id'} = $id;
3566                 $ref_item{'name'} = $name;
3567                 if ($type eq "tag") {
3568                         $ref_item{'subject'} = $title;
3569                         $ref_item{'reftype'} = $reftype;
3570                         $ref_item{'refid'}   = $refid;
3571                 } else {
3572                         $ref_item{'reftype'} = $type;
3573                         $ref_item{'refid'}   = $id;
3574                 }
3575
3576                 if ($type eq "tag" || $type eq "commit") {
3577                         $ref_item{'epoch'} = $epoch;
3578                         if ($epoch) {
3579                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3580                         } else {
3581                                 $ref_item{'age'} = "unknown";
3582                         }
3583                 }
3584
3585                 push @tagslist, \%ref_item;
3586         }
3587         close $fd;
3588
3589         return wantarray ? @tagslist : \@tagslist;
3590 }
3591
3592 ## ----------------------------------------------------------------------
3593 ## filesystem-related functions
3594
3595 sub get_file_owner {
3596         my $path = shift;
3597
3598         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3599         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3600         if (!defined $gcos) {
3601                 return undef;
3602         }
3603         my $owner = $gcos;
3604         $owner =~ s/[,;].*$//;
3605         return to_utf8($owner);
3606 }
3607
3608 # assume that file exists
3609 sub insert_file {
3610         my $filename = shift;
3611
3612         open my $fd, '<', $filename;
3613         print map { to_utf8($_) } <$fd>;
3614         close $fd;
3615 }
3616
3617 ## ......................................................................
3618 ## mimetype related functions
3619
3620 sub mimetype_guess_file {
3621         my $filename = shift;
3622         my $mimemap = shift;
3623         -r $mimemap or return undef;
3624
3625         my %mimemap;
3626         open(my $mh, '<', $mimemap) or return undef;
3627         while (<$mh>) {
3628                 next if m/^#/; # skip comments
3629                 my ($mimetype, @exts) = split(/\s+/);
3630                 foreach my $ext (@exts) {
3631                         $mimemap{$ext} = $mimetype;
3632                 }
3633         }
3634         close($mh);
3635
3636         $filename =~ /\.([^.]*)$/;
3637         return $mimemap{$1};
3638 }
3639
3640 sub mimetype_guess {
3641         my $filename = shift;
3642         my $mime;
3643         $filename =~ /\./ or return undef;
3644
3645         if ($mimetypes_file) {
3646                 my $file = $mimetypes_file;
3647                 if ($file !~ m!^/!) { # if it is relative path
3648                         # it is relative to project
3649                         $file = "$projectroot/$project/$file";
3650                 }
3651                 $mime = mimetype_guess_file($filename, $file);
3652         }
3653         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3654         return $mime;
3655 }
3656
3657 sub blob_mimetype {
3658         my $fd = shift;
3659         my $filename = shift;
3660
3661         if ($filename) {
3662                 my $mime = mimetype_guess($filename);
3663                 $mime and return $mime;
3664         }
3665
3666         # just in case
3667         return $default_blob_plain_mimetype unless $fd;
3668
3669         if (-T $fd) {
3670                 return 'text/plain';
3671         } elsif (! $filename) {
3672                 return 'application/octet-stream';
3673         } elsif ($filename =~ m/\.png$/i) {
3674                 return 'image/png';
3675         } elsif ($filename =~ m/\.gif$/i) {
3676                 return 'image/gif';
3677         } elsif ($filename =~ m/\.jpe?g$/i) {
3678                 return 'image/jpeg';
3679         } else {
3680                 return 'application/octet-stream';
3681         }
3682 }
3683
3684 sub blob_contenttype {
3685         my ($fd, $file_name, $type) = @_;
3686
3687         $type ||= blob_mimetype($fd, $file_name);
3688         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3689                 $type .= "; charset=$default_text_plain_charset";
3690         }
3691
3692         return $type;
3693 }
3694
3695 # guess file syntax for syntax highlighting; return undef if no highlighting
3696 # the name of syntax can (in the future) depend on syntax highlighter used
3697 sub guess_file_syntax {
3698         my ($highlight, $mimetype, $file_name) = @_;
3699         return undef unless ($highlight && defined $file_name);
3700         my $basename = basename($file_name, '.in');
3701         return $highlight_basename{$basename}
3702                 if exists $highlight_basename{$basename};
3703
3704         $basename =~ /\.([^.]*)$/;
3705         my $ext = $1 or return undef;
3706         return $highlight_ext{$ext}
3707                 if exists $highlight_ext{$ext};
3708
3709         return undef;
3710 }
3711
3712 # run highlighter and return FD of its output,
3713 # or return original FD if no highlighting
3714 sub run_highlighter {
3715         my ($fd, $highlight, $syntax) = @_;
3716         return $fd unless ($highlight && defined $syntax);
3717
3718         close $fd;
3719         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3720                   quote_command($highlight_bin).
3721                   " --replace-tabs=8 --fragment --syntax $syntax |"
3722                 or die_error(500, "Couldn't open file or run syntax highlighter");
3723         return $fd;
3724 }
3725
3726 ## ======================================================================
3727 ## functions printing HTML: header, footer, error page
3728
3729 sub get_page_title {
3730         my $title = to_utf8($site_name);
3731
3732         return $title unless (defined $project);
3733         $title .= " - " . to_utf8($project);
3734
3735         return $title unless (defined $action);
3736         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3737
3738         return $title unless (defined $file_name);
3739         $title .= " - " . esc_path($file_name);
3740         if ($action eq "tree" && $file_name !~ m|/$|) {
3741                 $title .= "/";
3742         }
3743
3744         return $title;
3745 }
3746
3747 sub get_content_type_html {
3748         # require explicit support from the UA if we are to send the page as
3749         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3750         # we have to do this because MSIE sometimes globs '*/*', pretending to
3751         # support xhtml+xml but choking when it gets what it asked for.
3752         if (defined $cgi->http('HTTP_ACCEPT') &&
3753             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3754             $cgi->Accept('application/xhtml+xml') != 0) {
3755                 return 'application/xhtml+xml';
3756         } else {
3757                 return 'text/html';
3758         }
3759 }
3760
3761 sub print_feed_meta {
3762         if (defined $project) {
3763                 my %href_params = get_feed_info();
3764                 if (!exists $href_params{'-title'}) {
3765                         $href_params{'-title'} = 'log';
3766                 }
3767
3768                 foreach my $format (qw(RSS Atom)) {
3769                         my $type = lc($format);
3770                         my %link_attr = (
3771                                 '-rel' => 'alternate',
3772                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3773                                 '-type' => "application/$type+xml"
3774                         );
3775
3776                         $href_params{'action'} = $type;
3777                         $link_attr{'-href'} = href(%href_params);
3778                         print "<link ".
3779                               "rel=\"$link_attr{'-rel'}\" ".
3780                               "title=\"$link_attr{'-title'}\" ".
3781                               "href=\"$link_attr{'-href'}\" ".
3782                               "type=\"$link_attr{'-type'}\" ".
3783                               "/>\n";
3784
3785                         $href_params{'extra_options'} = '--no-merges';
3786                         $link_attr{'-href'} = href(%href_params);
3787                         $link_attr{'-title'} .= ' (no merges)';
3788                         print "<link ".
3789                               "rel=\"$link_attr{'-rel'}\" ".
3790                               "title=\"$link_attr{'-title'}\" ".
3791                               "href=\"$link_attr{'-href'}\" ".
3792                               "type=\"$link_attr{'-type'}\" ".
3793                               "/>\n";
3794                 }
3795
3796         } else {
3797                 printf('<link rel="alternate" title="%s projects list" '.
3798                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3799                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3800                 printf('<link rel="alternate" title="%s projects feeds" '.
3801                        'href="%s" type="text/x-opml" />'."\n",
3802                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3803         }
3804 }
3805
3806 sub print_header_links {
3807         my $status = shift;
3808
3809         # print out each stylesheet that exist, providing backwards capability
3810         # for those people who defined $stylesheet in a config file
3811         if (defined $stylesheet) {
3812                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3813         } else {
3814                 foreach my $stylesheet (@stylesheets) {
3815                         next unless $stylesheet;
3816                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3817                 }
3818         }
3819         print_feed_meta()
3820                 if ($status eq '200 OK');
3821         if (defined $favicon) {
3822                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3823         }
3824 }
3825
3826 sub print_nav_breadcrumbs {
3827         my %opts = @_;
3828
3829         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3830         if (defined $project) {
3831                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3832                 if (defined $action) {
3833                         my $action_print = $action ;
3834                         if (defined $opts{-action_extra}) {
3835                                 $action_print = $cgi->a({-href => href(action=>$action)},
3836                                         $action);
3837                         }
3838                         print " / $action_print";
3839                 }
3840                 if (defined $opts{-action_extra}) {
3841                         print " / $opts{-action_extra}";
3842                 }
3843                 print "\n";
3844         }
3845 }
3846
3847 sub print_search_form {
3848         if (!defined $searchtext) {
3849                 $searchtext = "";
3850         }
3851         my $search_hash;
3852         if (defined $hash_base) {
3853                 $search_hash = $hash_base;
3854         } elsif (defined $hash) {
3855                 $search_hash = $hash;
3856         } else {
3857                 $search_hash = "HEAD";
3858         }
3859         my $action = $my_uri;
3860         my $use_pathinfo = gitweb_check_feature('pathinfo');
3861         if ($use_pathinfo) {
3862                 $action .= "/".esc_url($project);
3863         }
3864         print $cgi->startform(-method => "get", -action => $action) .
3865               "<div class=\"search\">\n" .
3866               (!$use_pathinfo &&
3867               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3868               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3869               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3870               $cgi->popup_menu(-name => 'st', -default => 'commit',
3871                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3872               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3873               " search:\n",
3874               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3875               "<span title=\"Extended regular expression\">" .
3876               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3877                              -checked => $search_use_regexp) .
3878               "</span>" .
3879               "</div>" .
3880               $cgi->end_form() . "\n";
3881 }
3882
3883 sub git_header_html {
3884         my $status = shift || "200 OK";
3885         my $expires = shift;
3886         my %opts = @_;
3887
3888         my $title = get_page_title();
3889         my $content_type = get_content_type_html();
3890         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3891                            -status=> $status, -expires => $expires)
3892                 unless ($opts{'-no_http_header'});
3893         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3894         print <<EOF;
3895 <?xml version="1.0" encoding="utf-8"?>
3896 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3897 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3898 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3899 <!-- git core binaries version $git_version -->
3900 <head>
3901 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3902 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3903 <meta name="robots" content="index, nofollow"/>
3904 <title>$title</title>
3905 EOF
3906         # the stylesheet, favicon etc urls won't work correctly with path_info
3907         # unless we set the appropriate base URL
3908         if ($ENV{'PATH_INFO'}) {
3909                 print "<base href=\"".esc_url($base_url)."\" />\n";
3910         }
3911         print_header_links($status);
3912
3913         if (defined $site_html_head_string) {
3914                 print to_utf8($site_html_head_string);
3915         }
3916
3917         print "</head>\n" .
3918               "<body>\n";
3919
3920         if (defined $site_header && -f $site_header) {
3921                 insert_file($site_header);
3922         }
3923
3924         print "<div class=\"page_header\">\n";
3925         if (defined $logo) {
3926                 print $cgi->a({-href => esc_url($logo_url),
3927                                -title => $logo_label},
3928                               $cgi->img({-src => esc_url($logo),
3929                                          -width => 72, -height => 27,
3930                                          -alt => "git",
3931                                          -class => "logo"}));
3932         }
3933         print_nav_breadcrumbs(%opts);
3934         print "</div>\n";
3935
3936         my $have_search = gitweb_check_feature('search');
3937         if (defined $project && $have_search) {
3938                 print_search_form();
3939         }
3940 }
3941
3942 sub git_footer_html {
3943         my $feed_class = 'rss_logo';
3944
3945         print "<div class=\"page_footer\">\n";
3946         if (defined $project) {
3947                 my $descr = git_get_project_description($project);
3948                 if (defined $descr) {
3949                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3950                 }
3951
3952                 my %href_params = get_feed_info();
3953                 if (!%href_params) {
3954                         $feed_class .= ' generic';
3955                 }
3956                 $href_params{'-title'} ||= 'log';
3957
3958                 foreach my $format (qw(RSS Atom)) {
3959                         $href_params{'action'} = lc($format);
3960                         print $cgi->a({-href => href(%href_params),
3961                                       -title => "$href_params{'-title'} $format feed",
3962                                       -class => $feed_class}, $format)."\n";
3963                 }
3964
3965         } else {
3966                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3967                               -class => $feed_class}, "OPML") . " ";
3968                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3969                               -class => $feed_class}, "TXT") . "\n";
3970         }
3971         print "</div>\n"; # class="page_footer"
3972
3973         if (defined $t0 && gitweb_check_feature('timed')) {
3974                 print "<div id=\"generating_info\">\n";
3975                 print 'This page took '.
3976                       '<span id="generating_time" class="time_span">'.
3977                       tv_interval($t0, [ gettimeofday() ]).
3978                       ' seconds </span>'.
3979                       ' and '.
3980                       '<span id="generating_cmd">'.
3981                       $number_of_git_cmds.
3982                       '</span> git commands '.
3983                       " to generate.\n";
3984                 print "</div>\n"; # class="page_footer"
3985         }
3986
3987         if (defined $site_footer && -f $site_footer) {
3988                 insert_file($site_footer);
3989         }
3990
3991         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3992         if (defined $action &&
3993             $action eq 'blame_incremental') {
3994                 print qq!<script type="text/javascript">\n!.
3995                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3996                       qq!           "!. href() .qq!");\n!.
3997                       qq!</script>\n!;
3998         } else {
3999                 my ($jstimezone, $tz_cookie, $datetime_class) =
4000                         gitweb_get_feature('javascript-timezone');
4001
4002                 print qq!<script type="text/javascript">\n!.
4003                       qq!window.onload = function () {\n!;
4004                 if (gitweb_check_feature('javascript-actions')) {
4005                         print qq!       fixLinks();\n!;
4006                 }
4007                 if ($jstimezone && $tz_cookie && $datetime_class) {
4008                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4009                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4010                 }
4011                 print qq!};\n!.
4012                       qq!</script>\n!;
4013         }
4014
4015         print "</body>\n" .
4016               "</html>";
4017 }
4018
4019 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4020 # Example: die_error(404, 'Hash not found')
4021 # By convention, use the following status codes (as defined in RFC 2616):
4022 # 400: Invalid or missing CGI parameters, or
4023 #      requested object exists but has wrong type.
4024 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4025 #      this server or project.
4026 # 404: Requested object/revision/project doesn't exist.
4027 # 500: The server isn't configured properly, or
4028 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4029 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4030 # 503: The server is currently unavailable (because it is overloaded,
4031 #      or down for maintenance).  Generally, this is a temporary state.
4032 sub die_error {
4033         my $status = shift || 500;
4034         my $error = esc_html(shift) || "Internal Server Error";
4035         my $extra = shift;
4036         my %opts = @_;
4037
4038         my %http_responses = (
4039                 400 => '400 Bad Request',
4040                 403 => '403 Forbidden',
4041                 404 => '404 Not Found',
4042                 500 => '500 Internal Server Error',
4043                 503 => '503 Service Unavailable',
4044         );
4045         git_header_html($http_responses{$status}, undef, %opts);
4046         print <<EOF;
4047 <div class="page_body">
4048 <br /><br />
4049 $status - $error
4050 <br />
4051 EOF
4052         if (defined $extra) {
4053                 print "<hr />\n" .
4054                       "$extra\n";
4055         }
4056         print "</div>\n";
4057
4058         git_footer_html();
4059         goto DONE_GITWEB
4060                 unless ($opts{'-error_handler'});
4061 }
4062
4063 ## ----------------------------------------------------------------------
4064 ## functions printing or outputting HTML: navigation
4065
4066 sub git_print_page_nav {
4067         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4068         $extra = '' if !defined $extra; # pager or formats
4069
4070         my @navs = qw(summary shortlog log commit commitdiff tree);
4071         if ($suppress) {
4072                 @navs = grep { $_ ne $suppress } @navs;
4073         }
4074
4075         my %arg = map { $_ => {action=>$_} } @navs;
4076         if (defined $head) {
4077                 for (qw(commit commitdiff)) {
4078                         $arg{$_}{'hash'} = $head;
4079                 }
4080                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4081                         for (qw(shortlog log)) {
4082                                 $arg{$_}{'hash'} = $head;
4083                         }
4084                 }
4085         }
4086
4087         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4088         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4089
4090         my @actions = gitweb_get_feature('actions');
4091         my %repl = (
4092                 '%' => '%',
4093                 'n' => $project,         # project name
4094                 'f' => $git_dir,         # project path within filesystem
4095                 'h' => $treehead || '',  # current hash ('h' parameter)
4096                 'b' => $treebase || '',  # hash base ('hb' parameter)
4097         );
4098         while (@actions) {
4099                 my ($label, $link, $pos) = splice(@actions,0,3);
4100                 # insert
4101                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4102                 # munch munch
4103                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4104                 $arg{$label}{'_href'} = $link;
4105         }
4106
4107         print "<div class=\"page_nav\">\n" .
4108                 (join " | ",
4109                  map { $_ eq $current ?
4110                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4111                  } @navs);
4112         print "<br/>\n$extra<br/>\n" .
4113               "</div>\n";
4114 }
4115
4116 # returns a submenu for the nagivation of the refs views (tags, heads,
4117 # remotes) with the current view disabled and the remotes view only
4118 # available if the feature is enabled
4119 sub format_ref_views {
4120         my ($current) = @_;
4121         my @ref_views = qw{tags heads};
4122         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4123         return join " | ", map {
4124                 $_ eq $current ? $_ :
4125                 $cgi->a({-href => href(action=>$_)}, $_)
4126         } @ref_views
4127 }
4128
4129 sub format_paging_nav {
4130         my ($action, $page, $has_next_link) = @_;
4131         my $paging_nav;
4132
4133
4134         if ($page > 0) {
4135                 $paging_nav .=
4136                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4137                         " &sdot; " .
4138                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4139                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4140         } else {
4141                 $paging_nav .= "first &sdot; prev";
4142         }
4143
4144         if ($has_next_link) {
4145                 $paging_nav .= " &sdot; " .
4146                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4147                                  -accesskey => "n", -title => "Alt-n"}, "next");
4148         } else {
4149                 $paging_nav .= " &sdot; next";
4150         }
4151
4152         return $paging_nav;
4153 }
4154
4155 ## ......................................................................
4156 ## functions printing or outputting HTML: div
4157
4158 sub git_print_header_div {
4159         my ($action, $title, $hash, $hash_base) = @_;
4160         my %args = ();
4161
4162         $args{'action'} = $action;
4163         $args{'hash'} = $hash if $hash;
4164         $args{'hash_base'} = $hash_base if $hash_base;
4165
4166         print "<div class=\"header\">\n" .
4167               $cgi->a({-href => href(%args), -class => "title"},
4168               $title ? $title : $action) .
4169               "\n</div>\n";
4170 }
4171
4172 sub format_repo_url {
4173         my ($name, $url) = @_;
4174         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4175 }
4176
4177 # Group output by placing it in a DIV element and adding a header.
4178 # Options for start_div() can be provided by passing a hash reference as the
4179 # first parameter to the function.
4180 # Options to git_print_header_div() can be provided by passing an array
4181 # reference. This must follow the options to start_div if they are present.
4182 # The content can be a scalar, which is output as-is, a scalar reference, which
4183 # is output after html escaping, an IO handle passed either as *handle or
4184 # *handle{IO}, or a function reference. In the latter case all following
4185 # parameters will be taken as argument to the content function call.
4186 sub git_print_section {
4187         my ($div_args, $header_args, $content);
4188         my $arg = shift;
4189         if (ref($arg) eq 'HASH') {
4190                 $div_args = $arg;
4191                 $arg = shift;
4192         }
4193         if (ref($arg) eq 'ARRAY') {
4194                 $header_args = $arg;
4195                 $arg = shift;
4196         }
4197         $content = $arg;
4198
4199         print $cgi->start_div($div_args);
4200         git_print_header_div(@$header_args);
4201
4202         if (ref($content) eq 'CODE') {
4203                 $content->(@_);
4204         } elsif (ref($content) eq 'SCALAR') {
4205                 print esc_html($$content);
4206         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4207                 print <$content>;
4208         } elsif (!ref($content) && defined($content)) {
4209                 print $content;
4210         }
4211
4212         print $cgi->end_div;
4213 }
4214
4215 sub format_timestamp_html {
4216         my $date = shift;
4217         my $strtime = $date->{'rfc2822'};
4218
4219         my (undef, undef, $datetime_class) =
4220                 gitweb_get_feature('javascript-timezone');
4221         if ($datetime_class) {
4222                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4223         }
4224
4225         my $localtime_format = '(%02d:%02d %s)';
4226         if ($date->{'hour_local'} < 6) {
4227                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4228         }
4229         $strtime .= ' ' .
4230                     sprintf($localtime_format,
4231                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4232
4233         return $strtime;
4234 }
4235
4236 # Outputs the author name and date in long form
4237 sub git_print_authorship {
4238         my $co = shift;
4239         my %opts = @_;
4240         my $tag = $opts{-tag} || 'div';
4241         my $author = $co->{'author_name'};
4242
4243         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4244         print "<$tag class=\"author_date\">" .
4245               format_search_author($author, "author", esc_html($author)) .
4246               " [".format_timestamp_html(\%ad)."]".
4247               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4248               "</$tag>\n";
4249 }
4250
4251 # Outputs table rows containing the full author or committer information,
4252 # in the format expected for 'commit' view (& similar).
4253 # Parameters are a commit hash reference, followed by the list of people
4254 # to output information for. If the list is empty it defaults to both
4255 # author and committer.
4256 sub git_print_authorship_rows {
4257         my $co = shift;
4258         # too bad we can't use @people = @_ || ('author', 'committer')
4259         my @people = @_;
4260         @people = ('author', 'committer') unless @people;
4261         foreach my $who (@people) {
4262                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4263                 print "<tr><td>$who</td><td>" .
4264                       format_search_author($co->{"${who}_name"}, $who,
4265                                            esc_html($co->{"${who}_name"})) . " " .
4266                       format_search_author($co->{"${who}_email"}, $who,
4267                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4268                       "</td><td rowspan=\"2\">" .
4269                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4270                       "</td></tr>\n" .
4271                       "<tr>" .
4272                       "<td></td><td>" .
4273                       format_timestamp_html(\%wd) .
4274                       "</td>" .
4275                       "</tr>\n";
4276         }
4277 }
4278
4279 sub git_print_page_path {
4280         my $name = shift;
4281         my $type = shift;
4282         my $hb = shift;
4283
4284
4285         print "<div class=\"page_path\">";
4286         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4287                       -title => 'tree root'}, to_utf8("[$project]"));
4288         print " / ";
4289         if (defined $name) {
4290                 my @dirname = split '/', $name;
4291                 my $basename = pop @dirname;
4292                 my $fullname = '';
4293
4294                 foreach my $dir (@dirname) {
4295                         $fullname .= ($fullname ? '/' : '') . $dir;
4296                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4297                                                      hash_base=>$hb),
4298                                       -title => $fullname}, esc_path($dir));
4299                         print " / ";
4300                 }
4301                 if (defined $type && $type eq 'blob') {
4302                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4303                                                      hash_base=>$hb),
4304                                       -title => $name}, esc_path($basename));
4305                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4306 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4307 <script>
4308 function toggleLineNumbers() {
4309         e = document.getElementById("lineNoStyle");
4310         e2 = document.getElementById("lineNoToggle");
4311         if (e2.innerHTML == "[Hide line numbers]") {
4312                 e.innerHTML = ".linenr { display:none; }";
4313                 e2.innerHTML = "[Show line numbers]";
4314         }
4315         else {
4316                 e.innerHTML = "";
4317                 e2.innerHTML = "[Hide line numbers]";
4318         }
4319 }
4320 var style = document.createElement("style");
4321 style.setAttribute("id", "lineNoStyle");
4322 document.getElementsByTagName("head")[0].appendChild(style);
4323 toggleLineNumbers();
4324 </script>
4325 ';
4326                 } elsif (defined $type && $type eq 'tree') {
4327                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4328                                                      hash_base=>$hb),
4329                                       -title => $name}, esc_path($basename));
4330                         print " / ";
4331                 } else {
4332                         print esc_path($basename);
4333                 }
4334         }
4335         print "<br/></div>\n";
4336 }
4337
4338 sub git_print_log {
4339         my $log = shift;
4340         my %opts = @_;
4341
4342         if ($opts{'-remove_title'}) {
4343                 # remove title, i.e. first line of log
4344                 shift @$log;
4345         }
4346         # remove leading empty lines
4347         while (defined $log->[0] && $log->[0] eq "") {
4348                 shift @$log;
4349         }
4350
4351         # print log
4352         my $signoff = 0;
4353         my $empty = 0;
4354         foreach my $line (@$log) {
4355                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4356                         $signoff = 1;
4357                         $empty = 0;
4358                         if (! $opts{'-remove_signoff'}) {
4359                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4360                                 next;
4361                         } else {
4362                                 # remove signoff lines
4363                                 next;
4364                         }
4365                 } else {
4366                         $signoff = 0;
4367                 }
4368
4369                 # print only one empty line
4370                 # do not print empty line after signoff
4371                 if ($line eq "") {
4372                         next if ($empty || $signoff);
4373                         $empty = 1;
4374                 } else {
4375                         $empty = 0;
4376                 }
4377
4378                 print format_log_line_html($line) . "<br/>\n";
4379         }
4380
4381         if ($opts{'-final_empty_line'}) {
4382                 # end with single empty line
4383                 print "<br/>\n" unless $empty;
4384         }
4385 }
4386
4387 # return link target (what link points to)
4388 sub git_get_link_target {
4389         my $hash = shift;
4390         my $link_target;
4391
4392         # read link
4393         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4394                 or return;
4395         {
4396                 local $/ = undef;
4397                 $link_target = <$fd>;
4398         }
4399         close $fd
4400                 or return;
4401
4402         return $link_target;
4403 }
4404
4405 # given link target, and the directory (basedir) the link is in,
4406 # return target of link relative to top directory (top tree);
4407 # return undef if it is not possible (including absolute links).
4408 sub normalize_link_target {
4409         my ($link_target, $basedir) = @_;
4410
4411         # absolute symlinks (beginning with '/') cannot be normalized
4412         return if (substr($link_target, 0, 1) eq '/');
4413
4414         # normalize link target to path from top (root) tree (dir)
4415         my $path;
4416         if ($basedir) {
4417                 $path = $basedir . '/' . $link_target;
4418         } else {
4419                 # we are in top (root) tree (dir)
4420                 $path = $link_target;
4421         }
4422
4423         # remove //, /./, and /../
4424         my @path_parts;
4425         foreach my $part (split('/', $path)) {
4426                 # discard '.' and ''
4427                 next if (!$part || $part eq '.');
4428                 # handle '..'
4429                 if ($part eq '..') {
4430                         if (@path_parts) {
4431                                 pop @path_parts;
4432                         } else {
4433                                 # link leads outside repository (outside top dir)
4434                                 return;
4435                         }
4436                 } else {
4437                         push @path_parts, $part;
4438                 }
4439         }
4440         $path = join('/', @path_parts);
4441
4442         return $path;
4443 }
4444
4445 # print tree entry (row of git_tree), but without encompassing <tr> element
4446 sub git_print_tree_entry {
4447         my ($t, $basedir, $hash_base, $have_blame) = @_;
4448
4449         my %base_key = ();
4450         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4451
4452         # The format of a table row is: mode list link.  Where mode is
4453         # the mode of the entry, list is the name of the entry, an href,
4454         # and link is the action links of the entry.
4455
4456         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4457         if (exists $t->{'size'}) {
4458                 print "<td class=\"size\">$t->{'size'}</td>\n";
4459         }
4460         if ($t->{'type'} eq "blob") {
4461                 print "<td class=\"list\">" .
4462                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4463                                                file_name=>"$basedir$t->{'name'}", %base_key),
4464                                 -class => "list"}, esc_path($t->{'name'}));
4465                 if (S_ISLNK(oct $t->{'mode'})) {
4466                         my $link_target = git_get_link_target($t->{'hash'});
4467                         if ($link_target) {
4468                                 my $norm_target = normalize_link_target($link_target, $basedir);
4469                                 if (defined $norm_target) {
4470                                         print " -> " .
4471                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4472                                                                      file_name=>$norm_target),
4473                                                        -title => $norm_target}, esc_path($link_target));
4474                                 } else {
4475                                         print " -> " . esc_path($link_target);
4476                                 }
4477                         }
4478                 }
4479                 print "</td>\n";
4480                 print "<td class=\"link\">";
4481                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4482                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4483                               "blob");
4484                 if ($have_blame) {
4485                         print " | " .
4486                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4487                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4488                                       "blame");
4489                 }
4490                 if (defined $hash_base) {
4491                         print " | " .
4492                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4493                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4494                                       "history");
4495                 }
4496                 print " | " .
4497                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4498                                                file_name=>"$basedir$t->{'name'}")},
4499                                 "raw");
4500                 print "</td>\n";
4501
4502         } elsif ($t->{'type'} eq "tree") {
4503                 print "<td class=\"list\">";
4504                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4505                                              file_name=>"$basedir$t->{'name'}",
4506                                              %base_key)},
4507                               esc_path($t->{'name'}));
4508                 print "</td>\n";
4509                 print "<td class=\"link\">";
4510                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4511                                              file_name=>"$basedir$t->{'name'}",
4512                                              %base_key)},
4513                               "tree");
4514                 if (defined $hash_base) {
4515                         print " | " .
4516                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4517                                                      file_name=>"$basedir$t->{'name'}")},
4518                                       "history");
4519                 }
4520                 print "</td>\n";
4521         } else {
4522                 # unknown object: we can only present history for it
4523                 # (this includes 'commit' object, i.e. submodule support)
4524                 print "<td class=\"list\">" .
4525                       esc_path($t->{'name'}) .
4526                       "</td>\n";
4527                 print "<td class=\"link\">";
4528                 if (defined $hash_base) {
4529                         print $cgi->a({-href => href(action=>"history",
4530                                                      hash_base=>$hash_base,
4531                                                      file_name=>"$basedir$t->{'name'}")},
4532                                       "history");
4533                 }
4534                 print "</td>\n";
4535         }
4536 }
4537
4538 ## ......................................................................
4539 ## functions printing large fragments of HTML
4540
4541 # get pre-image filenames for merge (combined) diff
4542 sub fill_from_file_info {
4543         my ($diff, @parents) = @_;
4544
4545         $diff->{'from_file'} = [ ];
4546         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4547         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4548                 if ($diff->{'status'}[$i] eq 'R' ||
4549                     $diff->{'status'}[$i] eq 'C') {
4550                         $diff->{'from_file'}[$i] =
4551                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4552                 }
4553         }
4554
4555         return $diff;
4556 }
4557
4558 # is current raw difftree line of file deletion
4559 sub is_deleted {
4560         my $diffinfo = shift;
4561
4562         return $diffinfo->{'to_id'} eq ('0' x 40);
4563 }
4564
4565 # does patch correspond to [previous] difftree raw line
4566 # $diffinfo  - hashref of parsed raw diff format
4567 # $patchinfo - hashref of parsed patch diff format
4568 #              (the same keys as in $diffinfo)
4569 sub is_patch_split {
4570         my ($diffinfo, $patchinfo) = @_;
4571
4572         return defined $diffinfo && defined $patchinfo
4573                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4574 }
4575
4576
4577 sub git_difftree_body {
4578         my ($difftree, $hash, @parents) = @_;
4579         my ($parent) = $parents[0];
4580         my $have_blame = gitweb_check_feature('blame');
4581         print "<div class=\"list_head\">\n";
4582         if ($#{$difftree} > 10) {
4583                 print(($#{$difftree} + 1) . " files changed:\n");
4584         }
4585         print "</div>\n";
4586
4587         print "<table class=\"" .
4588               (@parents > 1 ? "combined " : "") .
4589               "diff_tree\">\n";
4590
4591         # header only for combined diff in 'commitdiff' view
4592         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4593         if ($has_header) {
4594                 # table header
4595                 print "<thead><tr>\n" .
4596                        "<th></th><th></th>\n"; # filename, patchN link
4597                 for (my $i = 0; $i < @parents; $i++) {
4598                         my $par = $parents[$i];
4599                         print "<th>" .
4600                               $cgi->a({-href => href(action=>"commitdiff",
4601                                                      hash=>$hash, hash_parent=>$par),
4602                                        -title => 'commitdiff to parent number ' .
4603                                                   ($i+1) . ': ' . substr($par,0,7)},
4604                                       $i+1) .
4605                               "&nbsp;</th>\n";
4606                 }
4607                 print "</tr></thead>\n<tbody>\n";
4608         }
4609
4610         my $alternate = 1;
4611         my $patchno = 0;
4612         foreach my $line (@{$difftree}) {
4613                 my $diff = parsed_difftree_line($line);
4614
4615                 if ($alternate) {
4616                         print "<tr class=\"dark\">\n";
4617                 } else {
4618                         print "<tr class=\"light\">\n";
4619                 }
4620                 $alternate ^= 1;
4621
4622                 if (exists $diff->{'nparents'}) { # combined diff
4623
4624                         fill_from_file_info($diff, @parents)
4625                                 unless exists $diff->{'from_file'};
4626
4627                         if (!is_deleted($diff)) {
4628                                 # file exists in the result (child) commit
4629                                 print "<td>" .
4630                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4631                                                              file_name=>$diff->{'to_file'},
4632                                                              hash_base=>$hash),
4633                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4634                                       "</td>\n";
4635                         } else {
4636                                 print "<td>" .
4637                                       esc_path($diff->{'to_file'}) .
4638                                       "</td>\n";
4639                         }
4640
4641                         if ($action eq 'commitdiff') {
4642                                 # link to patch
4643                                 $patchno++;
4644                                 print "<td class=\"link\">" .
4645                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4646                                               "patch") .
4647                                       " | " .
4648                                       "</td>\n";
4649                         }
4650
4651                         my $has_history = 0;
4652                         my $not_deleted = 0;
4653                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4654                                 my $hash_parent = $parents[$i];
4655                                 my $from_hash = $diff->{'from_id'}[$i];
4656                                 my $from_path = $diff->{'from_file'}[$i];
4657                                 my $status = $diff->{'status'}[$i];
4658
4659                                 $has_history ||= ($status ne 'A');
4660                                 $not_deleted ||= ($status ne 'D');
4661
4662                                 if ($status eq 'A') {
4663                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4664                                 } elsif ($status eq 'D') {
4665                                         print "<td class=\"link\">" .
4666                                               $cgi->a({-href => href(action=>"blob",
4667                                                                      hash_base=>$hash,
4668                                                                      hash=>$from_hash,
4669                                                                      file_name=>$from_path)},
4670                                                       "blob" . ($i+1)) .
4671                                               " | </td>\n";
4672                                 } else {
4673                                         if ($diff->{'to_id'} eq $from_hash) {
4674                                                 print "<td class=\"link nochange\">";
4675                                         } else {
4676                                                 print "<td class=\"link\">";
4677                                         }
4678                                         print $cgi->a({-href => href(action=>"blobdiff",
4679                                                                      hash=>$diff->{'to_id'},
4680                                                                      hash_parent=>$from_hash,
4681                                                                      hash_base=>$hash,
4682                                                                      hash_parent_base=>$hash_parent,
4683                                                                      file_name=>$diff->{'to_file'},
4684                                                                      file_parent=>$from_path)},
4685                                                       "diff" . ($i+1)) .
4686                                               " | </td>\n";
4687                                 }
4688                         }
4689
4690                         print "<td class=\"link\">";
4691                         if ($not_deleted) {
4692                                 print $cgi->a({-href => href(action=>"blob",
4693                                                              hash=>$diff->{'to_id'},
4694                                                              file_name=>$diff->{'to_file'},
4695                                                              hash_base=>$hash)},
4696                                               "blob");
4697                                 print " | " if ($has_history);
4698                         }
4699                         if ($has_history) {
4700                                 print $cgi->a({-href => href(action=>"history",
4701                                                              file_name=>$diff->{'to_file'},
4702                                                              hash_base=>$hash)},
4703                                               "history");
4704                         }
4705                         print "</td>\n";
4706
4707                         print "</tr>\n";
4708                         next; # instead of 'else' clause, to avoid extra indent
4709                 }
4710                 # else ordinary diff
4711
4712                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4713                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4714                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4715                         $to_mode_oct = oct $diff->{'to_mode'};
4716                         if (S_ISREG($to_mode_oct)) { # only for regular file
4717                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4718                         }
4719                         $to_file_type = file_type($diff->{'to_mode'});
4720                 }
4721                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4722                         $from_mode_oct = oct $diff->{'from_mode'};
4723                         if (S_ISREG($from_mode_oct)) { # only for regular file
4724                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4725                         }
4726                         $from_file_type = file_type($diff->{'from_mode'});
4727                 }
4728
4729                 if ($diff->{'status'} eq "A") { # created
4730                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4731                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4732                         $mode_chng   .= "]</span>";
4733                         print "<td>";
4734                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4735                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4736                                       -class => "list"}, esc_path($diff->{'file'}));
4737                         print "</td>\n";
4738                         print "<td>$mode_chng</td>\n";
4739                         print "<td class=\"link\">";
4740                         if ($action eq 'commitdiff') {
4741                                 # link to patch
4742                                 $patchno++;
4743                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4744                                               "patch") .
4745                                       " | ";
4746                         }
4747                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4748                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4749                                       "blob");
4750                         print "</td>\n";
4751
4752                 } elsif ($diff->{'status'} eq "D") { # deleted
4753                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4754                         print "<td>";
4755                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4756                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4757                                        -class => "list"}, esc_path($diff->{'file'}));
4758                         print "</td>\n";
4759                         print "<td>$mode_chng</td>\n";
4760                         print "<td class=\"link\">";
4761                         if ($action eq 'commitdiff') {
4762                                 # link to patch
4763                                 $patchno++;
4764                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4765                                               "patch") .
4766                                       " | ";
4767                         }
4768                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4769                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4770                                       "blob") . " | ";
4771                         if ($have_blame) {
4772                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4773                                                              file_name=>$diff->{'file'})},
4774                                               "blame") . " | ";
4775                         }
4776                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4777                                                      file_name=>$diff->{'file'})},
4778                                       "history");
4779                         print "</td>\n";
4780
4781                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4782                         my $mode_chnge = "";
4783                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4784                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4785                                 if ($from_file_type ne $to_file_type) {
4786                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4787                                 }
4788                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4789                                         if ($from_mode_str && $to_mode_str) {
4790                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4791                                         } elsif ($to_mode_str) {
4792                                                 $mode_chnge .= " mode: $to_mode_str";
4793                                         }
4794                                 }
4795                                 $mode_chnge .= "]</span>\n";
4796                         }
4797                         print "<td>";
4798                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4799                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4800                                       -class => "list"}, esc_path($diff->{'file'}));
4801                         print "</td>\n";
4802                         print "<td>$mode_chnge</td>\n";
4803                         print "<td class=\"link\">";
4804                         if ($action eq 'commitdiff') {
4805                                 # link to patch
4806                                 $patchno++;
4807                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4808                                               "patch") .
4809                                       " | ";
4810                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4811                                 # "commit" view and modified file (not onlu mode changed)
4812                                 print $cgi->a({-href => href(action=>"blobdiff",
4813                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4814                                                              hash_base=>$hash, hash_parent_base=>$parent,
4815                                                              file_name=>$diff->{'file'})},
4816                                               "diff") .
4817                                       " | ";
4818                         }
4819                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4820                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4821                                        "blob") . " | ";
4822                         if ($have_blame) {
4823                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4824                                                              file_name=>$diff->{'file'})},
4825                                               "blame") . " | ";
4826                         }
4827                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4828                                                      file_name=>$diff->{'file'})},
4829                                       "history");
4830                         print "</td>\n";
4831
4832                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4833                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4834                         my $nstatus = $status_name{$diff->{'status'}};
4835                         my $mode_chng = "";
4836                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4837                                 # mode also for directories, so we cannot use $to_mode_str
4838                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4839                         }
4840                         print "<td>" .
4841                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4842                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4843                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4844                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4845                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4846                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4847                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4848                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4849                               "<td class=\"link\">";
4850                         if ($action eq 'commitdiff') {
4851                                 # link to patch
4852                                 $patchno++;
4853                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4854                                               "patch") .
4855                                       " | ";
4856                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4857                                 # "commit" view and modified file (not only pure rename or copy)
4858                                 print $cgi->a({-href => href(action=>"blobdiff",
4859                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4860                                                              hash_base=>$hash, hash_parent_base=>$parent,
4861                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4862                                               "diff") .
4863                                       " | ";
4864                         }
4865                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4866                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4867                                       "blob") . " | ";
4868                         if ($have_blame) {
4869                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4870                                                              file_name=>$diff->{'to_file'})},
4871                                               "blame") . " | ";
4872                         }
4873                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4874                                                     file_name=>$diff->{'to_file'})},
4875                                       "history");
4876                         print "</td>\n";
4877
4878                 } # we should not encounter Unmerged (U) or Unknown (X) status
4879                 print "</tr>\n";
4880         }
4881         print "</tbody>" if $has_header;
4882         print "</table>\n";
4883 }
4884
4885 sub print_sidebyside_diff_chunk {
4886         my @chunk = @_;
4887         my (@ctx, @rem, @add);
4888
4889         return unless @chunk;
4890
4891         # incomplete last line might be among removed or added lines,
4892         # or both, or among context lines: find which
4893         for (my $i = 1; $i < @chunk; $i++) {
4894                 if ($chunk[$i][0] eq 'incomplete') {
4895                         $chunk[$i][0] = $chunk[$i-1][0];
4896                 }
4897         }
4898
4899         # guardian
4900         push @chunk, ["", ""];
4901
4902         foreach my $line_info (@chunk) {
4903                 my ($class, $line) = @$line_info;
4904
4905                 # print chunk headers
4906                 if ($class && $class eq 'chunk_header') {
4907                         print $line;
4908                         next;
4909                 }
4910
4911                 ## print from accumulator when type of class of lines change
4912                 # empty contents block on start rem/add block, or end of chunk
4913                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4914                         print join '',
4915                                 '<div class="chunk_block ctx">',
4916                                         '<div class="old">',
4917                                         @ctx,
4918                                         '</div>',
4919                                         '<div class="new">',
4920                                         @ctx,
4921                                         '</div>',
4922                                 '</div>';
4923                         @ctx = ();
4924                 }
4925                 # empty add/rem block on start context block, or end of chunk
4926                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4927                         if (!@add) {
4928                                 # pure removal
4929                                 print join '',
4930                                         '<div class="chunk_block rem">',
4931                                                 '<div class="old">',
4932                                                 @rem,
4933                                                 '</div>',
4934                                         '</div>';
4935                         } elsif (!@rem) {
4936                                 # pure addition
4937                                 print join '',
4938                                         '<div class="chunk_block add">',
4939                                                 '<div class="new">',
4940                                                 @add,
4941                                                 '</div>',
4942                                         '</div>';
4943                         } else {
4944                                 # assume that it is change
4945                                 print join '',
4946                                         '<div class="chunk_block chg">',
4947                                                 '<div class="old">',
4948                                                 @rem,
4949                                                 '</div>',
4950                                                 '<div class="new">',
4951                                                 @add,
4952                                                 '</div>',
4953                                         '</div>';
4954                         }
4955                         @rem = @add = ();
4956                 }
4957
4958                 ## adding lines to accumulator
4959                 # guardian value
4960                 last unless $line;
4961                 # rem, add or change
4962                 if ($class eq 'rem') {
4963                         push @rem, $line;
4964                 } elsif ($class eq 'add') {
4965                         push @add, $line;
4966                 }
4967                 # context line
4968                 if ($class eq 'ctx') {
4969                         push @ctx, $line;
4970                 }
4971         }
4972 }
4973
4974 sub git_patchset_body {
4975         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4976         my ($hash_parent) = $hash_parents[0];
4977
4978         my $is_combined = (@hash_parents > 1);
4979         my $patch_idx = 0;
4980         my $patch_number = 0;
4981         my $patch_line;
4982         my $diffinfo;
4983         my $to_name;
4984         my (%from, %to);
4985         my @chunk; # for side-by-side diff
4986
4987         print "<div class=\"patchset\">\n";
4988
4989         # skip to first patch
4990         while ($patch_line = <$fd>) {
4991                 chomp $patch_line;
4992
4993                 last if ($patch_line =~ m/^diff /);
4994         }
4995
4996  PATCH:
4997         while ($patch_line) {
4998
4999                 # parse "git diff" header line
5000                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5001                         # $1 is from_name, which we do not use
5002                         $to_name = unquote($2);
5003                         $to_name =~ s!^b/!!;
5004                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5005                         # $1 is 'cc' or 'combined', which we do not use
5006                         $to_name = unquote($2);
5007                 } else {
5008                         $to_name = undef;
5009                 }
5010
5011                 # check if current patch belong to current raw line
5012                 # and parse raw git-diff line if needed
5013                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5014                         # this is continuation of a split patch
5015                         print "<div class=\"patch cont\">\n";
5016                 } else {
5017                         # advance raw git-diff output if needed
5018                         $patch_idx++ if defined $diffinfo;
5019
5020                         # read and prepare patch information
5021                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5022
5023                         # compact combined diff output can have some patches skipped
5024                         # find which patch (using pathname of result) we are at now;
5025                         if ($is_combined) {
5026                                 while ($to_name ne $diffinfo->{'to_file'}) {
5027                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5028                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5029                                               "</div>\n";  # class="patch"
5030
5031                                         $patch_idx++;
5032                                         $patch_number++;
5033
5034                                         last if $patch_idx > $#$difftree;
5035                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5036                                 }
5037                         }
5038
5039                         # modifies %from, %to hashes
5040                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5041
5042                         # this is first patch for raw difftree line with $patch_idx index
5043                         # we index @$difftree array from 0, but number patches from 1
5044                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5045                 }
5046
5047                 # git diff header
5048                 #assert($patch_line =~ m/^diff /) if DEBUG;
5049                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5050                 $patch_number++;
5051                 # print "git diff" header
5052                 print format_git_diff_header_line($patch_line, $diffinfo,
5053                                                   \%from, \%to);
5054
5055                 # print extended diff header
5056                 print "<div class=\"diff extended_header\">\n";
5057         EXTENDED_HEADER:
5058                 while ($patch_line = <$fd>) {
5059                         chomp $patch_line;
5060
5061                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5062
5063                         print format_extended_diff_header_line($patch_line, $diffinfo,
5064                                                                \%from, \%to);
5065                 }
5066                 print "</div>\n"; # class="diff extended_header"
5067
5068                 # from-file/to-file diff header
5069                 if (! $patch_line) {
5070                         print "</div>\n"; # class="patch"
5071                         last PATCH;
5072                 }
5073                 next PATCH if ($patch_line =~ m/^diff /);
5074                 #assert($patch_line =~ m/^---/) if DEBUG;
5075
5076                 my $last_patch_line = $patch_line;
5077                 $patch_line = <$fd>;
5078                 chomp $patch_line;
5079                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5080
5081                 print format_diff_from_to_header($last_patch_line, $patch_line,
5082                                                  $diffinfo, \%from, \%to,
5083                                                  @hash_parents);
5084
5085                 # the patch itself
5086         LINE:
5087                 while ($patch_line = <$fd>) {
5088                         chomp $patch_line;
5089
5090                         next PATCH if ($patch_line =~ m/^diff /);
5091
5092                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5093                         my $diff_classes = "diff";
5094                         $diff_classes .= " $class" if ($class);
5095                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5096
5097                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5098                                 if ($class eq 'chunk_header') {
5099                                         print_sidebyside_diff_chunk(@chunk);
5100                                         @chunk = ( [ $class, $line ] );
5101                                 } else {
5102                                         push @chunk, [ $class, $line ];
5103                                 }
5104                         } else {
5105                                 # default 'inline' style and unknown styles
5106                                 print $line;
5107                         }
5108                 }
5109
5110         } continue {
5111                 if (@chunk) {
5112                         print_sidebyside_diff_chunk(@chunk);
5113                         @chunk = ();
5114                 }
5115                 print "</div>\n"; # class="patch"
5116         }
5117
5118         # for compact combined (--cc) format, with chunk and patch simplification
5119         # the patchset might be empty, but there might be unprocessed raw lines
5120         for (++$patch_idx if $patch_number > 0;
5121              $patch_idx < @$difftree;
5122              ++$patch_idx) {
5123                 # read and prepare patch information
5124                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5125
5126                 # generate anchor for "patch" links in difftree / whatchanged part
5127                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5128                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5129                       "</div>\n";  # class="patch"
5130
5131                 $patch_number++;
5132         }
5133
5134         if ($patch_number == 0) {
5135                 if (@hash_parents > 1) {
5136                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5137                 } else {
5138                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5139                 }
5140         }
5141
5142         print "</div>\n"; # class="patchset"
5143 }
5144
5145 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5146
5147 # fills project list info (age, description, owner, category, forks)
5148 # for each project in the list, removing invalid projects from
5149 # returned list
5150 # NOTE: modifies $projlist, but does not remove entries from it
5151 sub fill_project_list_info {
5152         my $projlist = shift;
5153         my @projects;
5154
5155         my $show_ctags = gitweb_check_feature('ctags');
5156  PROJECT:
5157         foreach my $pr (@$projlist) {
5158                 my (@activity) = git_get_last_activity($pr->{'path'});
5159                 unless (@activity) {
5160                         next PROJECT;
5161                 }
5162                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5163                 if (!defined $pr->{'descr'}) {
5164                         my $descr = git_get_project_description($pr->{'path'}) || "";
5165                         $descr = to_utf8($descr);
5166                         $pr->{'descr_long'} = $descr;
5167                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5168                 }
5169                 if (!defined $pr->{'owner'}) {
5170                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5171                 }
5172                 if ($show_ctags) {
5173                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5174                 }
5175                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5176                         my $cat = git_get_project_category($pr->{'path'}) ||
5177                                                            $project_list_default_category;
5178                         $pr->{'category'} = to_utf8($cat);
5179                 }
5180
5181                 push @projects, $pr;
5182         }
5183
5184         return @projects;
5185 }
5186
5187 sub sort_projects_list {
5188         my ($projlist, $order) = @_;
5189         my @projects;
5190
5191         my %order_info = (
5192                 project => { key => 'path', type => 'str' },
5193                 descr => { key => 'descr_long', type => 'str' },
5194                 owner => { key => 'owner', type => 'str' },
5195                 age => { key => 'age', type => 'num' }
5196         );
5197         my $oi = $order_info{$order};
5198         return @$projlist unless defined $oi;
5199         if ($oi->{'type'} eq 'str') {
5200                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5201         } else {
5202                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5203         }
5204
5205         return @projects;
5206 }
5207
5208 # returns a hash of categories, containing the list of project
5209 # belonging to each category
5210 sub build_projlist_by_category {
5211         my ($projlist, $from, $to) = @_;
5212         my %categories;
5213
5214         $from = 0 unless defined $from;
5215         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5216
5217         for (my $i = $from; $i <= $to; $i++) {
5218                 my $pr = $projlist->[$i];
5219                 push @{$categories{ $pr->{'category'} }}, $pr;
5220         }
5221
5222         return wantarray ? %categories : \%categories;
5223 }
5224
5225 # print 'sort by' <th> element, generating 'sort by $name' replay link
5226 # if that order is not selected
5227 sub print_sort_th {
5228         print format_sort_th(@_);
5229 }
5230
5231 sub format_sort_th {
5232         my ($name, $order, $header) = @_;
5233         my $sort_th = "";
5234         $header ||= ucfirst($name);
5235
5236         if ($order eq $name) {
5237                 $sort_th .= "<th>$header</th>\n";
5238         } else {
5239                 $sort_th .= "<th>" .
5240                             $cgi->a({-href => href(-replay=>1, order=>$name),
5241                                      -class => "header"}, $header) .
5242                             "</th>\n";
5243         }
5244
5245         return $sort_th;
5246 }
5247
5248 sub git_project_list_rows {
5249         my ($projlist, $from, $to, $check_forks) = @_;
5250
5251         $from = 0 unless defined $from;
5252         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5253
5254         my $alternate = 1;
5255         for (my $i = $from; $i <= $to; $i++) {
5256                 my $pr = $projlist->[$i];
5257
5258                 if ($alternate) {
5259                         print "<tr class=\"dark\">\n";
5260                 } else {
5261                         print "<tr class=\"light\">\n";
5262                 }
5263                 $alternate ^= 1;
5264
5265                 if ($check_forks) {
5266                         print "<td>";
5267                         if ($pr->{'forks'}) {
5268                                 my $nforks = scalar @{$pr->{'forks'}};
5269                                 if ($nforks > 0) {
5270                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5271                                                        -title => "$nforks forks"}, "+");
5272                                 } else {
5273                                         print $cgi->span({-title => "$nforks forks"}, "+");
5274                                 }
5275                         }
5276                         print "</td>\n";
5277                 }
5278                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5279                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5280                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5281                                         -class => "list", -title => $pr->{'descr_long'}},
5282                                         esc_html($pr->{'descr'})) . "</td>\n" .
5283                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5284                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5285                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5286                       "<td class=\"link\">" .
5287                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5288                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5289                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5290                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5291                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5292                       "</td>\n" .
5293                       "</tr>\n";
5294         }
5295 }
5296
5297 sub git_project_list_body {
5298         # actually uses global variable $project
5299         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5300         my @projects = @$projlist;
5301
5302         my $check_forks = gitweb_check_feature('forks');
5303         my $show_ctags  = gitweb_check_feature('ctags');
5304         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5305         $check_forks = undef
5306                 if ($tagfilter || $searchtext);
5307
5308         # filtering out forks before filling info allows to do less work
5309         @projects = filter_forks_from_projects_list(\@projects)
5310                 if ($check_forks);
5311         @projects = fill_project_list_info(\@projects);
5312         # searching projects require filling to be run before it
5313         @projects = search_projects_list(\@projects,
5314                                          'searchtext' => $searchtext,
5315                                          'tagfilter'  => $tagfilter)
5316                 if ($tagfilter || $searchtext);
5317
5318         $order ||= $default_projects_order;
5319         $from = 0 unless defined $from;
5320         $to = $#projects if (!defined $to || $#projects < $to);
5321
5322         # short circuit
5323         if ($from > $to) {
5324                 print "<center>\n".
5325                       "<b>No such projects found</b><br />\n".
5326                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5327                       "</center>\n<br />\n";
5328                 return;
5329         }
5330
5331         @projects = sort_projects_list(\@projects, $order);
5332
5333         if ($show_ctags) {
5334                 my $ctags = git_gather_all_ctags(\@projects);
5335                 my $cloud = git_populate_project_tagcloud($ctags);
5336                 print git_show_project_tagcloud($cloud, 64);
5337         }
5338
5339         print "<table class=\"project_list\">\n";
5340         unless ($no_header) {
5341                 print "<tr>\n";
5342                 if ($check_forks) {
5343                         print "<th></th>\n";
5344                 }
5345                 print_sort_th('project', $order, 'Project');
5346                 print_sort_th('descr', $order, 'Description');
5347                 print_sort_th('owner', $order, 'Owner');
5348                 print_sort_th('age', $order, 'Last Change');
5349                 print "<th></th>\n" . # for links
5350                       "</tr>\n";
5351         }
5352
5353         if ($projects_list_group_categories) {
5354                 # only display categories with projects in the $from-$to window
5355                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5356                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5357                 foreach my $cat (sort keys %categories) {
5358                         unless ($cat eq "") {
5359                                 print "<tr>\n";
5360                                 if ($check_forks) {
5361                                         print "<td></td>\n";
5362                                 }
5363                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5364                                 print "</tr>\n";
5365                         }
5366
5367                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5368                 }
5369         } else {
5370                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5371         }
5372
5373         if (defined $extra) {
5374                 print "<tr>\n";
5375                 if ($check_forks) {
5376                         print "<td></td>\n";
5377                 }
5378                 print "<td colspan=\"5\">$extra</td>\n" .
5379                       "</tr>\n";
5380         }
5381         print "</table>\n";
5382 }
5383
5384 sub git_log_body {
5385         # uses global variable $project
5386         my ($commitlist, $from, $to, $refs, $extra) = @_;
5387
5388         $from = 0 unless defined $from;
5389         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5390
5391         for (my $i = 0; $i <= $to; $i++) {
5392                 my %co = %{$commitlist->[$i]};
5393                 next if !%co;
5394                 my $commit = $co{'id'};
5395                 my $ref = format_ref_marker($refs, $commit);
5396                 git_print_header_div('commit',
5397                                "<span class=\"age\">$co{'age_string'}</span>" .
5398                                esc_html($co{'title'}) . $ref,
5399                                $commit);
5400                 print "<div class=\"title_text\">\n" .
5401                       "<div class=\"log_link\">\n" .
5402                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5403                       " | " .
5404                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5405                       " | " .
5406                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5407                       "<br/>\n" .
5408                       "</div>\n";
5409                       git_print_authorship(\%co, -tag => 'span');
5410                       print "<br/>\n</div>\n";
5411
5412                 print "<div class=\"log_body\">\n";
5413                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5414                 print "</div>\n";
5415         }
5416         if ($extra) {
5417                 print "<div class=\"page_nav\">\n";
5418                 print "$extra\n";
5419                 print "</div>\n";
5420         }
5421 }
5422
5423 sub git_shortlog_body {
5424         # uses global variable $project
5425         my ($commitlist, $from, $to, $refs, $extra) = @_;
5426
5427         $from = 0 unless defined $from;
5428         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5429
5430         print "<table class=\"shortlog\">\n";
5431         my $alternate = 1;
5432         for (my $i = $from; $i <= $to; $i++) {
5433                 my %co = %{$commitlist->[$i]};
5434                 my $commit = $co{'id'};
5435                 my $ref = format_ref_marker($refs, $commit);
5436                 if ($alternate) {
5437                         print "<tr class=\"dark\">\n";
5438                 } else {
5439                         print "<tr class=\"light\">\n";
5440                 }
5441                 $alternate ^= 1;
5442                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5443                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5444                       format_author_html('td', \%co, 10) . "<td>";
5445                 print format_subject_html($co{'title'}, $co{'title_short'},
5446                                           href(action=>"commit", hash=>$commit), $ref);
5447                 print "</td>\n" .
5448                       "<td class=\"link\">" .
5449                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5450                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5451                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5452                 my $snapshot_links = format_snapshot_links($commit);
5453                 if (defined $snapshot_links) {
5454                         print " | " . $snapshot_links;
5455                 }
5456                 print "</td>\n" .
5457                       "</tr>\n";
5458         }
5459         if (defined $extra) {
5460                 print "<tr>\n" .
5461                       "<td colspan=\"4\">$extra</td>\n" .
5462                       "</tr>\n";
5463         }
5464         print "</table>\n";
5465 }
5466
5467 sub git_history_body {
5468         # Warning: assumes constant type (blob or tree) during history
5469         my ($commitlist, $from, $to, $refs, $extra,
5470             $file_name, $file_hash, $ftype) = @_;
5471
5472         $from = 0 unless defined $from;
5473         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5474
5475         print "<table class=\"history\">\n";
5476         my $alternate = 1;
5477         for (my $i = $from; $i <= $to; $i++) {
5478                 my %co = %{$commitlist->[$i]};
5479                 if (!%co) {
5480                         next;
5481                 }
5482                 my $commit = $co{'id'};
5483
5484                 my $ref = format_ref_marker($refs, $commit);
5485
5486                 if ($alternate) {
5487                         print "<tr class=\"dark\">\n";
5488                 } else {
5489                         print "<tr class=\"light\">\n";
5490                 }
5491                 $alternate ^= 1;
5492                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5493         # shortlog:   format_author_html('td', \%co, 10)
5494                       format_author_html('td', \%co, 15, 3) . "<td>";
5495                 # originally git_history used chop_str($co{'title'}, 50)
5496                 print format_subject_html($co{'title'}, $co{'title_short'},
5497                                           href(action=>"commit", hash=>$commit), $ref);
5498                 print "</td>\n" .
5499                       "<td class=\"link\">" .
5500                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5501                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5502
5503                 if ($ftype eq 'blob') {
5504                         my $blob_current = $file_hash;
5505                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5506                         if (defined $blob_current && defined $blob_parent &&
5507                                         $blob_current ne $blob_parent) {
5508                                 print " | " .
5509                                         $cgi->a({-href => href(action=>"blobdiff",
5510                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5511                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5512                                                                file_name=>$file_name)},
5513                                                 "diff to current");
5514                         }
5515                 }
5516                 print "</td>\n" .
5517                       "</tr>\n";
5518         }
5519         if (defined $extra) {
5520                 print "<tr>\n" .
5521                       "<td colspan=\"4\">$extra</td>\n" .
5522                       "</tr>\n";
5523         }
5524         print "</table>\n";
5525 }
5526
5527 sub git_tags_body {
5528         # uses global variable $project
5529         my ($taglist, $from, $to, $extra) = @_;
5530         $from = 0 unless defined $from;
5531         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5532
5533         print "<table class=\"tags\">\n";
5534         my $alternate = 1;
5535         for (my $i = $from; $i <= $to; $i++) {
5536                 my $entry = $taglist->[$i];
5537                 my %tag = %$entry;
5538                 my $comment = $tag{'subject'};
5539                 my $comment_short;
5540                 if (defined $comment) {
5541                         $comment_short = chop_str($comment, 30, 5);
5542                 }
5543                 if ($alternate) {
5544                         print "<tr class=\"dark\">\n";
5545                 } else {
5546                         print "<tr class=\"light\">\n";
5547                 }
5548                 $alternate ^= 1;
5549                 if (defined $tag{'age'}) {
5550                         print "<td><i>$tag{'age'}</i></td>\n";
5551                 } else {
5552                         print "<td></td>\n";
5553                 }
5554                 print "<td>" .
5555                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5556                                -class => "list name"}, esc_html($tag{'name'})) .
5557                       "</td>\n" .
5558                       "<td>";
5559                 if (defined $comment) {
5560                         print format_subject_html($comment, $comment_short,
5561                                                   href(action=>"tag", hash=>$tag{'id'}));
5562                 }
5563                 print "</td>\n" .
5564                       "<td class=\"selflink\">";
5565                 if ($tag{'type'} eq "tag") {
5566                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5567                 } else {
5568                         print "&nbsp;";
5569                 }
5570                 print "</td>\n" .
5571                       "<td class=\"link\">" . " | " .
5572                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5573                 if ($tag{'reftype'} eq "commit") {
5574                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5575                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5576                 } elsif ($tag{'reftype'} eq "blob") {
5577                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5578                 }
5579                 print "</td>\n" .
5580                       "</tr>";
5581         }
5582         if (defined $extra) {
5583                 print "<tr>\n" .
5584                       "<td colspan=\"5\">$extra</td>\n" .
5585                       "</tr>\n";
5586         }
5587         print "</table>\n";
5588 }
5589
5590 sub git_heads_body {
5591         # uses global variable $project
5592         my ($headlist, $head, $from, $to, $extra) = @_;
5593         $from = 0 unless defined $from;
5594         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5595
5596         print "<table class=\"heads\">\n";
5597         my $alternate = 1;
5598         for (my $i = $from; $i <= $to; $i++) {
5599                 my $entry = $headlist->[$i];
5600                 my %ref = %$entry;
5601                 my $curr = $ref{'id'} eq $head;
5602                 if ($alternate) {
5603                         print "<tr class=\"dark\">\n";
5604                 } else {
5605                         print "<tr class=\"light\">\n";
5606                 }
5607                 $alternate ^= 1;
5608                 print "<td><i>$ref{'age'}</i></td>\n" .
5609                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5610                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5611                                -class => "list name"},esc_html($ref{'name'})) .
5612                       "</td>\n" .
5613                       "<td class=\"link\">" .
5614                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5615                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5616                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5617                       "</td>\n" .
5618                       "</tr>";
5619         }
5620         if (defined $extra) {
5621                 print "<tr>\n" .
5622                       "<td colspan=\"3\">$extra</td>\n" .
5623                       "</tr>\n";
5624         }
5625         print "</table>\n";
5626 }
5627
5628 # Display a single remote block
5629 sub git_remote_block {
5630         my ($remote, $rdata, $limit, $head) = @_;
5631
5632         my $heads = $rdata->{'heads'};
5633         my $fetch = $rdata->{'fetch'};
5634         my $push = $rdata->{'push'};
5635
5636         my $urls_table = "<table class=\"projects_list\">\n" ;
5637
5638         if (defined $fetch) {
5639                 if ($fetch eq $push) {
5640                         $urls_table .= format_repo_url("URL", $fetch);
5641                 } else {
5642                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5643                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5644                 }
5645         } elsif (defined $push) {
5646                 $urls_table .= format_repo_url("Push URL", $push);
5647         } else {
5648                 $urls_table .= format_repo_url("", "No remote URL");
5649         }
5650
5651         $urls_table .= "</table>\n";
5652
5653         my $dots;
5654         if (defined $limit && $limit < @$heads) {
5655                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5656         }
5657
5658         print $urls_table;
5659         git_heads_body($heads, $head, 0, $limit, $dots);
5660 }
5661
5662 # Display a list of remote names with the respective fetch and push URLs
5663 sub git_remotes_list {
5664         my ($remotedata, $limit) = @_;
5665         print "<table class=\"heads\">\n";
5666         my $alternate = 1;
5667         my @remotes = sort keys %$remotedata;
5668
5669         my $limited = $limit && $limit < @remotes;
5670
5671         $#remotes = $limit - 1 if $limited;
5672
5673         while (my $remote = shift @remotes) {
5674                 my $rdata = $remotedata->{$remote};
5675                 my $fetch = $rdata->{'fetch'};
5676                 my $push = $rdata->{'push'};
5677                 if ($alternate) {
5678                         print "<tr class=\"dark\">\n";
5679                 } else {
5680                         print "<tr class=\"light\">\n";
5681                 }
5682                 $alternate ^= 1;
5683                 print "<td>" .
5684                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5685                                -class=> "list name"},esc_html($remote)) .
5686                       "</td>";
5687                 print "<td class=\"link\">" .
5688                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5689                       " | " .
5690                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5691                       "</td>";
5692
5693                 print "</tr>\n";
5694         }
5695
5696         if ($limited) {
5697                 print "<tr>\n" .
5698                       "<td colspan=\"3\">" .
5699                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5700                       "</td>\n" . "</tr>\n";
5701         }
5702
5703         print "</table>";
5704 }
5705
5706 # Display remote heads grouped by remote, unless there are too many
5707 # remotes, in which case we only display the remote names
5708 sub git_remotes_body {
5709         my ($remotedata, $limit, $head) = @_;
5710         if ($limit and $limit < keys %$remotedata) {
5711                 git_remotes_list($remotedata, $limit);
5712         } else {
5713                 fill_remote_heads($remotedata);
5714                 while (my ($remote, $rdata) = each %$remotedata) {
5715                         git_print_section({-class=>"remote", -id=>$remote},
5716                                 ["remotes", $remote, $remote], sub {
5717                                         git_remote_block($remote, $rdata, $limit, $head);
5718                                 });
5719                 }
5720         }
5721 }
5722
5723 sub git_search_message {
5724         my %co = @_;
5725
5726         my $greptype;
5727         if ($searchtype eq 'commit') {
5728                 $greptype = "--grep=";
5729         } elsif ($searchtype eq 'author') {
5730                 $greptype = "--author=";
5731         } elsif ($searchtype eq 'committer') {
5732                 $greptype = "--committer=";
5733         }
5734         $greptype .= $searchtext;
5735         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5736                                        $greptype, '--regexp-ignore-case',
5737                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5738
5739         my $paging_nav = '';
5740         if ($page > 0) {
5741                 $paging_nav .=
5742                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5743                                 "first") .
5744                         " &sdot; " .
5745                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5746                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5747         } else {
5748                 $paging_nav .= "first &sdot; prev";
5749         }
5750         my $next_link = '';
5751         if ($#commitlist >= 100) {
5752                 $next_link =
5753                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5754                                  -accesskey => "n", -title => "Alt-n"}, "next");
5755                 $paging_nav .= " &sdot; $next_link";
5756         } else {
5757                 $paging_nav .= " &sdot; next";
5758         }
5759
5760         git_header_html();
5761
5762         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5763         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5764         if ($page == 0 && !@commitlist) {
5765                 print "<p>No match.</p>\n";
5766         } else {
5767                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5768         }
5769
5770         git_footer_html();
5771 }
5772
5773 sub git_search_changes {
5774         my %co = @_;
5775
5776         local $/ = "\n";
5777         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5778                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5779                 ($search_use_regexp ? '--pickaxe-regex' : ())
5780                         or die_error(500, "Open git-log failed");
5781
5782         git_header_html();
5783
5784         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5785         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5786
5787         print "<table class=\"pickaxe search\">\n";
5788         my $alternate = 1;
5789         undef %co;
5790         my @files;
5791         while (my $line = <$fd>) {
5792                 chomp $line;
5793                 next unless $line;
5794
5795                 my %set = parse_difftree_raw_line($line);
5796                 if (defined $set{'commit'}) {
5797                         # finish previous commit
5798                         if (%co) {
5799                                 print "</td>\n" .
5800                                       "<td class=\"link\">" .
5801                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5802                                               "commit") .
5803                                       " | " .
5804                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5805                                                              hash_base=>$co{'id'})},
5806                                               "tree") .
5807                                       "</td>\n" .
5808                                       "</tr>\n";
5809                         }
5810
5811                         if ($alternate) {
5812                                 print "<tr class=\"dark\">\n";
5813                         } else {
5814                                 print "<tr class=\"light\">\n";
5815                         }
5816                         $alternate ^= 1;
5817                         %co = parse_commit($set{'commit'});
5818                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5819                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5820                               "<td><i>$author</i></td>\n" .
5821                               "<td>" .
5822                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5823                                       -class => "list subject"},
5824                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5825                 } elsif (defined $set{'to_id'}) {
5826                         next if ($set{'to_id'} =~ m/^0{40}$/);
5827
5828                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5829                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5830                                       -class => "list"},
5831                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5832                               "<br/>\n";
5833                 }
5834         }
5835         close $fd;
5836
5837         # finish last commit (warning: repetition!)
5838         if (%co) {
5839                 print "</td>\n" .
5840                       "<td class=\"link\">" .
5841                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5842                               "commit") .
5843                       " | " .
5844                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5845                                              hash_base=>$co{'id'})},
5846                               "tree") .
5847                       "</td>\n" .
5848                       "</tr>\n";
5849         }
5850
5851         print "</table>\n";
5852
5853         git_footer_html();
5854 }
5855
5856 sub git_search_files {
5857         my %co = @_;
5858
5859         local $/ = "\n";
5860         open my $fd, "-|", git_cmd(), 'grep', '-n',
5861                 $search_use_regexp ? ('-E', '-i') : '-F',
5862                 $searchtext, $co{'tree'}
5863                         or die_error(500, "Open git-grep failed");
5864
5865         git_header_html();
5866
5867         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5868         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5869
5870         print "<table class=\"grep_search\">\n";
5871         my $alternate = 1;
5872         my $matches = 0;
5873         my $lastfile = '';
5874         while (my $line = <$fd>) {
5875                 chomp $line;
5876                 my ($file, $lno, $ltext, $binary);
5877                 last if ($matches++ > 1000);
5878                 if ($line =~ /^Binary file (.+) matches$/) {
5879                         $file = $1;
5880                         $binary = 1;
5881                 } else {
5882                         (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5883                 }
5884                 if ($file ne $lastfile) {
5885                         $lastfile and print "</td></tr>\n";
5886                         if ($alternate++) {
5887                                 print "<tr class=\"dark\">\n";
5888                         } else {
5889                                 print "<tr class=\"light\">\n";
5890                         }
5891                         print "<td class=\"list\">".
5892                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5893                                                        file_name=>"$file"),
5894                                         -class => "list"}, esc_path($file));
5895                         print "</td><td>\n";
5896                         $lastfile = $file;
5897                 }
5898                 if ($binary) {
5899                         print "<div class=\"binary\">Binary file</div>\n";
5900                 } else {
5901                         $ltext = untabify($ltext);
5902                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5903                                 $ltext = esc_html($1, -nbsp=>1);
5904                                 $ltext .= '<span class="match">';
5905                                 $ltext .= esc_html($2, -nbsp=>1);
5906                                 $ltext .= '</span>';
5907                                 $ltext .= esc_html($3, -nbsp=>1);
5908                         } else {
5909                                 $ltext = esc_html($ltext, -nbsp=>1);
5910                         }
5911                         print "<div class=\"pre\">" .
5912                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5913                                                        file_name=>"$file").'#l'.$lno,
5914                                         -class => "linenr"}, sprintf('%4i', $lno))
5915                                 . ' ' .  $ltext . "</div>\n";
5916                 }
5917         }
5918         if ($lastfile) {
5919                 print "</td></tr>\n";
5920                 if ($matches > 1000) {
5921                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5922                 }
5923         } else {
5924                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5925         }
5926         close $fd;
5927
5928         print "</table>\n";
5929
5930         git_footer_html();
5931 }
5932
5933 sub git_search_grep_body {
5934         my ($commitlist, $from, $to, $extra) = @_;
5935         $from = 0 unless defined $from;
5936         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5937
5938         print "<table class=\"commit_search\">\n";
5939         my $alternate = 1;
5940         for (my $i = $from; $i <= $to; $i++) {
5941                 my %co = %{$commitlist->[$i]};
5942                 if (!%co) {
5943                         next;
5944                 }
5945                 my $commit = $co{'id'};
5946                 if ($alternate) {
5947                         print "<tr class=\"dark\">\n";
5948                 } else {
5949                         print "<tr class=\"light\">\n";
5950                 }
5951                 $alternate ^= 1;
5952                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5953                       format_author_html('td', \%co, 15, 5) .
5954                       "<td>" .
5955                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5956                                -class => "list subject"},
5957                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5958                 my $comment = $co{'comment'};
5959                 foreach my $line (@$comment) {
5960                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5961                                 my ($lead, $match, $trail) = ($1, $2, $3);
5962                                 $match = chop_str($match, 70, 5, 'center');
5963                                 my $contextlen = int((80 - length($match))/2);
5964                                 $contextlen = 30 if ($contextlen > 30);
5965                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5966                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5967
5968                                 $lead  = esc_html($lead);
5969                                 $match = esc_html($match);
5970                                 $trail = esc_html($trail);
5971
5972                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5973                         }
5974                 }
5975                 print "</td>\n" .
5976                       "<td class=\"link\">" .
5977                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5978                       " | " .
5979                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5980                       " | " .
5981                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5982                 print "</td>\n" .
5983                       "</tr>\n";
5984         }
5985         if (defined $extra) {
5986                 print "<tr>\n" .
5987                       "<td colspan=\"3\">$extra</td>\n" .
5988                       "</tr>\n";
5989         }
5990         print "</table>\n";
5991 }
5992
5993 ## ======================================================================
5994 ## ======================================================================
5995 ## actions
5996
5997 sub git_project_list {
5998         my $order = $input_params{'order'};
5999         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6000                 die_error(400, "Unknown order parameter");
6001         }
6002
6003         my @list = git_get_projects_list();
6004         if (!@list) {
6005                 die_error(404, "No projects found");
6006         }
6007
6008         git_header_html();
6009         if (defined $home_text && -f $home_text) {
6010                 print "<div class=\"index_include\">\n";
6011                 insert_file($home_text);
6012                 print "</div>\n";
6013         }
6014         print $cgi->startform(-method => "get") .
6015               "<p class=\"projsearch\">Search:\n" .
6016               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6017               "</p>" .
6018               $cgi->end_form() . "\n";
6019         git_project_list_body(\@list, $order);
6020         git_footer_html();
6021 }
6022
6023 sub git_forks {
6024         my $order = $input_params{'order'};
6025         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6026                 die_error(400, "Unknown order parameter");
6027         }
6028
6029         my @list = git_get_projects_list($project);
6030         if (!@list) {
6031                 die_error(404, "No forks found");
6032         }
6033
6034         git_header_html();
6035         git_print_page_nav('','');
6036         git_print_header_div('summary', "$project forks");
6037         git_project_list_body(\@list, $order);
6038         git_footer_html();
6039 }
6040
6041 sub git_project_index {
6042         my @projects = git_get_projects_list();
6043         if (!@projects) {
6044                 die_error(404, "No projects found");
6045         }
6046
6047         print $cgi->header(
6048                 -type => 'text/plain',
6049                 -charset => 'utf-8',
6050                 -content_disposition => 'inline; filename="index.aux"');
6051
6052         foreach my $pr (@projects) {
6053                 if (!exists $pr->{'owner'}) {
6054                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6055                 }
6056
6057                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6058                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6059                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6060                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6061                 $path  =~ s/ /\+/g;
6062                 $owner =~ s/ /\+/g;
6063
6064                 print "$path $owner\n";
6065         }
6066 }
6067
6068 sub git_summary {
6069         my $descr = git_get_project_description($project) || "none";
6070         my %co = parse_commit("HEAD");
6071         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6072         my $head = $co{'id'};
6073         my $remote_heads = gitweb_check_feature('remote_heads');
6074
6075         my $owner = git_get_project_owner($project);
6076
6077         my $refs = git_get_references();
6078         # These get_*_list functions return one more to allow us to see if
6079         # there are more ...
6080         my @taglist  = git_get_tags_list(16);
6081         my @headlist = git_get_heads_list(16);
6082         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6083         my @forklist;
6084         my $check_forks = gitweb_check_feature('forks');
6085
6086         if ($check_forks) {
6087                 # find forks of a project
6088                 @forklist = git_get_projects_list($project);
6089                 # filter out forks of forks
6090                 @forklist = filter_forks_from_projects_list(\@forklist)
6091                         if (@forklist);
6092         }
6093
6094         git_header_html();
6095         git_print_page_nav('summary','', $head);
6096
6097         print "<div class=\"title\">&nbsp;</div>\n";
6098         print "<table class=\"projects_list\">\n" .
6099               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6100               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6101         if (defined $cd{'rfc2822'}) {
6102                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6103                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6104         }
6105
6106         # use per project git URL list in $projectroot/$project/cloneurl
6107         # or make project git URL from git base URL and project name
6108         my $url_tag = "URL";
6109         my @url_list = git_get_project_url_list($project);
6110         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6111         foreach my $git_url (@url_list) {
6112                 next unless $git_url;
6113                 print format_repo_url($url_tag, $git_url);
6114                 $url_tag = "";
6115         }
6116
6117         # Tag cloud
6118         my $show_ctags = gitweb_check_feature('ctags');
6119         if ($show_ctags) {
6120                 my $ctags = git_get_project_ctags($project);
6121                 if (%$ctags) {
6122                         # without ability to add tags, don't show if there are none
6123                         my $cloud = git_populate_project_tagcloud($ctags);
6124                         print "<tr id=\"metadata_ctags\">" .
6125                               "<td>content tags</td>" .
6126                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6127                               "</tr>\n";
6128                 }
6129         }
6130
6131         print "</table>\n";
6132
6133         # If XSS prevention is on, we don't include README.html.
6134         # TODO: Allow a readme in some safe format.
6135         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6136                 print "<div class=\"title\">readme</div>\n" .
6137                       "<div class=\"readme\">\n";
6138                 insert_file("$projectroot/$project/README.html");
6139                 print "\n</div>\n"; # class="readme"
6140         }
6141
6142         # we need to request one more than 16 (0..15) to check if
6143         # those 16 are all
6144         my @commitlist = $head ? parse_commits($head, 17) : ();
6145         if (@commitlist) {
6146                 git_print_header_div('shortlog');
6147                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6148                                   $#commitlist <=  15 ? undef :
6149                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6150         }
6151
6152         if (@taglist) {
6153                 git_print_header_div('tags');
6154                 git_tags_body(\@taglist, 0, 15,
6155                               $#taglist <=  15 ? undef :
6156                               $cgi->a({-href => href(action=>"tags")}, "..."));
6157         }
6158
6159         if (@headlist) {
6160                 git_print_header_div('heads');
6161                 git_heads_body(\@headlist, $head, 0, 15,
6162                                $#headlist <= 15 ? undef :
6163                                $cgi->a({-href => href(action=>"heads")}, "..."));
6164         }
6165
6166         if (%remotedata) {
6167                 git_print_header_div('remotes');
6168                 git_remotes_body(\%remotedata, 15, $head);
6169         }
6170
6171         if (@forklist) {
6172                 git_print_header_div('forks');
6173                 git_project_list_body(\@forklist, 'age', 0, 15,
6174                                       $#forklist <= 15 ? undef :
6175                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6176                                       'no_header');
6177         }
6178
6179         git_footer_html();
6180 }
6181
6182 sub git_tag {
6183         my %tag = parse_tag($hash);
6184
6185         if (! %tag) {
6186                 die_error(404, "Unknown tag object");
6187         }
6188
6189         my $head = git_get_head_hash($project);
6190         git_header_html();
6191         git_print_page_nav('','', $head,undef,$head);
6192         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6193         print "<div class=\"title_text\">\n" .
6194               "<table class=\"object_header\">\n" .
6195               "<tr>\n" .
6196               "<td>object</td>\n" .
6197               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6198                                $tag{'object'}) . "</td>\n" .
6199               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6200                                               $tag{'type'}) . "</td>\n" .
6201               "</tr>\n";
6202         if (defined($tag{'author'})) {
6203                 git_print_authorship_rows(\%tag, 'author');
6204         }
6205         print "</table>\n\n" .
6206               "</div>\n";
6207         print "<div class=\"page_body\">";
6208         my $comment = $tag{'comment'};
6209         foreach my $line (@$comment) {
6210                 chomp $line;
6211                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6212         }
6213         print "</div>\n";
6214         git_footer_html();
6215 }
6216
6217 sub git_blame_common {
6218         my $format = shift || 'porcelain';
6219         if ($format eq 'porcelain' && $cgi->param('js')) {
6220                 $format = 'incremental';
6221                 $action = 'blame_incremental'; # for page title etc
6222         }
6223
6224         # permissions
6225         gitweb_check_feature('blame')
6226                 or die_error(403, "Blame view not allowed");
6227
6228         # error checking
6229         die_error(400, "No file name given") unless $file_name;
6230         $hash_base ||= git_get_head_hash($project);
6231         die_error(404, "Couldn't find base commit") unless $hash_base;
6232         my %co = parse_commit($hash_base)
6233                 or die_error(404, "Commit not found");
6234         my $ftype = "blob";
6235         if (!defined $hash) {
6236                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6237                         or die_error(404, "Error looking up file");
6238         } else {
6239                 $ftype = git_get_type($hash);
6240                 if ($ftype !~ "blob") {
6241                         die_error(400, "Object is not a blob");
6242                 }
6243         }
6244
6245         my $fd;
6246         if ($format eq 'incremental') {
6247                 # get file contents (as base)
6248                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6249                         or die_error(500, "Open git-cat-file failed");
6250         } elsif ($format eq 'data') {
6251                 # run git-blame --incremental
6252                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6253                         $hash_base, "--", $file_name
6254                         or die_error(500, "Open git-blame --incremental failed");
6255         } else {
6256                 # run git-blame --porcelain
6257                 open $fd, "-|", git_cmd(), "blame", '-p',
6258                         $hash_base, '--', $file_name
6259                         or die_error(500, "Open git-blame --porcelain failed");
6260         }
6261
6262         # incremental blame data returns early
6263         if ($format eq 'data') {
6264                 print $cgi->header(
6265                         -type=>"text/plain", -charset => "utf-8",
6266                         -status=> "200 OK");
6267                 local $| = 1; # output autoflush
6268                 while (my $line = <$fd>) {
6269                         print to_utf8($line);
6270                 }
6271                 close $fd
6272                         or print "ERROR $!\n";
6273
6274                 print 'END';
6275                 if (defined $t0 && gitweb_check_feature('timed')) {
6276                         print ' '.
6277                               tv_interval($t0, [ gettimeofday() ]).
6278                               ' '.$number_of_git_cmds;
6279                 }
6280                 print "\n";
6281
6282                 return;
6283         }
6284
6285         # page header
6286         git_header_html();
6287         my $formats_nav =
6288                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6289                         "blob") .
6290                 " | ";
6291         if ($format eq 'incremental') {
6292                 $formats_nav .=
6293                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6294                                 "blame") . " (non-incremental)";
6295         } else {
6296                 $formats_nav .=
6297                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6298                                 "blame") . " (incremental)";
6299         }
6300         $formats_nav .=
6301                 " | " .
6302                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6303                         "history") .
6304                 " | " .
6305                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6306                         "HEAD");
6307         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6308         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6309         git_print_page_path($file_name, $ftype, $hash_base);
6310
6311         # page body
6312         if ($format eq 'incremental') {
6313                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6314                       "This page requires JavaScript to run.\n Use ".
6315                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6316                               'this page').
6317                       " instead.\n".
6318                       "</b></center></div>\n</noscript>\n";
6319
6320                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6321         }
6322
6323         print qq!<div class="page_body">\n!;
6324         print qq!<div id="progress_info">... / ...</div>\n!
6325                 if ($format eq 'incremental');
6326         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6327               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6328               qq!<thead>\n!.
6329               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6330               qq!</thead>\n!.
6331               qq!<tbody>\n!;
6332
6333         my @rev_color = qw(light dark);
6334         my $num_colors = scalar(@rev_color);
6335         my $current_color = 0;
6336
6337         if ($format eq 'incremental') {
6338                 my $color_class = $rev_color[$current_color];
6339
6340                 #contents of a file
6341                 my $linenr = 0;
6342         LINE:
6343                 while (my $line = <$fd>) {
6344                         chomp $line;
6345                         $linenr++;
6346
6347                         print qq!<tr id="l$linenr" class="$color_class">!.
6348                               qq!<td class="sha1"><a href=""> </a></td>!.
6349                               qq!<td class="linenr">!.
6350                               qq!<a class="linenr" href="">$linenr</a></td>!;
6351                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6352                         print qq!</tr>\n!;
6353                 }
6354
6355         } else { # porcelain, i.e. ordinary blame
6356                 my %metainfo = (); # saves information about commits
6357
6358                 # blame data
6359         LINE:
6360                 while (my $line = <$fd>) {
6361                         chomp $line;
6362                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6363                         # no <lines in group> for subsequent lines in group of lines
6364                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6365                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6366                         if (!exists $metainfo{$full_rev}) {
6367                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6368                         }
6369                         my $meta = $metainfo{$full_rev};
6370                         my $data;
6371                         while ($data = <$fd>) {
6372                                 chomp $data;
6373                                 last if ($data =~ s/^\t//); # contents of line
6374                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6375                                         $meta->{$1} = $2 unless exists $meta->{$1};
6376                                 }
6377                                 if ($data =~ /^previous /) {
6378                                         $meta->{'nprevious'}++;
6379                                 }
6380                         }
6381                         my $short_rev = substr($full_rev, 0, 8);
6382                         my $author = $meta->{'author'};
6383                         my %date =
6384                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6385                         my $date = $date{'iso-tz'};
6386                         if ($group_size) {
6387                                 $current_color = ($current_color + 1) % $num_colors;
6388                         }
6389                         my $tr_class = $rev_color[$current_color];
6390                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6391                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6392                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6393                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6394                         if ($group_size) {
6395                                 print "<td class=\"sha1\"";
6396                                 print " title=\"". esc_html($author) . ", $date\"";
6397                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6398                                 print ">";
6399                                 print $cgi->a({-href => href(action=>"commit",
6400                                                              hash=>$full_rev,
6401                                                              file_name=>$file_name)},
6402                                               esc_html($short_rev));
6403                                 if ($group_size >= 2) {
6404                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6405                                         if (@author_initials) {
6406                                                 print "<br />" .
6407                                                       esc_html(join('', @author_initials));
6408                                                 #           or join('.', ...)
6409                                         }
6410                                 }
6411                                 print "</td>\n";
6412                         }
6413                         # 'previous' <sha1 of parent commit> <filename at commit>
6414                         if (exists $meta->{'previous'} &&
6415                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6416                                 $meta->{'parent'} = $1;
6417                                 $meta->{'file_parent'} = unquote($2);
6418                         }
6419                         my $linenr_commit =
6420                                 exists($meta->{'parent'}) ?
6421                                 $meta->{'parent'} : $full_rev;
6422                         my $linenr_filename =
6423                                 exists($meta->{'file_parent'}) ?
6424                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6425                         my $blamed = href(action => 'blame',
6426                                           file_name => $linenr_filename,
6427                                           hash_base => $linenr_commit);
6428                         print "<td class=\"linenr\">";
6429                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6430                                         -class => "linenr" },
6431                                       esc_html($lineno));
6432                         print "</td>";
6433                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6434                         print "</tr>\n";
6435                 } # end while
6436
6437         }
6438
6439         # footer
6440         print "</tbody>\n".
6441               "</table>\n"; # class="blame"
6442         print "</div>\n";   # class="blame_body"
6443         close $fd
6444                 or print "Reading blob failed\n";
6445
6446         git_footer_html();
6447 }
6448
6449 sub git_blame {
6450         git_blame_common();
6451 }
6452
6453 sub git_blame_incremental {
6454         git_blame_common('incremental');
6455 }
6456
6457 sub git_blame_data {
6458         git_blame_common('data');
6459 }
6460
6461 sub git_tags {
6462         my $head = git_get_head_hash($project);
6463         git_header_html();
6464         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6465         git_print_header_div('summary', $project);
6466
6467         my @tagslist = git_get_tags_list();
6468         if (@tagslist) {
6469                 git_tags_body(\@tagslist);
6470         }
6471         git_footer_html();
6472 }
6473
6474 sub git_heads {
6475         my $head = git_get_head_hash($project);
6476         git_header_html();
6477         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6478         git_print_header_div('summary', $project);
6479
6480         my @headslist = git_get_heads_list();
6481         if (@headslist) {
6482                 git_heads_body(\@headslist, $head);
6483         }
6484         git_footer_html();
6485 }
6486
6487 # used both for single remote view and for list of all the remotes
6488 sub git_remotes {
6489         gitweb_check_feature('remote_heads')
6490                 or die_error(403, "Remote heads view is disabled");
6491
6492         my $head = git_get_head_hash($project);
6493         my $remote = $input_params{'hash'};
6494
6495         my $remotedata = git_get_remotes_list($remote);
6496         die_error(500, "Unable to get remote information") unless defined $remotedata;
6497
6498         unless (%$remotedata) {
6499                 die_error(404, defined $remote ?
6500                         "Remote $remote not found" :
6501                         "No remotes found");
6502         }
6503
6504         git_header_html(undef, undef, -action_extra => $remote);
6505         git_print_page_nav('', '',  $head, undef, $head,
6506                 format_ref_views($remote ? '' : 'remotes'));
6507
6508         fill_remote_heads($remotedata);
6509         if (defined $remote) {
6510                 git_print_header_div('remotes', "$remote remote for $project");
6511                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6512         } else {
6513                 git_print_header_div('summary', "$project remotes");
6514                 git_remotes_body($remotedata, undef, $head);
6515         }
6516
6517         git_footer_html();
6518 }
6519
6520 sub git_blob_plain {
6521         my $type = shift;
6522         my $expires;
6523
6524         if (!defined $hash) {
6525                 if (defined $file_name) {
6526                         my $base = $hash_base || git_get_head_hash($project);
6527                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6528                                 or die_error(404, "Cannot find file");
6529                 } else {
6530                         die_error(400, "No file name defined");
6531                 }
6532         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6533                 # blobs defined by non-textual hash id's can be cached
6534                 $expires = "+1d";
6535         }
6536
6537         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6538                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6539
6540         # content-type (can include charset)
6541         $type = blob_contenttype($fd, $file_name, $type);
6542
6543         # "save as" filename, even when no $file_name is given
6544         my $save_as = "$hash";
6545         if (defined $file_name) {
6546                 $save_as = $file_name;
6547         } elsif ($type =~ m/^text\//) {
6548                 $save_as .= '.txt';
6549         }
6550
6551         # With XSS prevention on, blobs of all types except a few known safe
6552         # ones are served with "Content-Disposition: attachment" to make sure
6553         # they don't run in our security domain.  For certain image types,
6554         # blob view writes an <img> tag referring to blob_plain view, and we
6555         # want to be sure not to break that by serving the image as an
6556         # attachment (though Firefox 3 doesn't seem to care).
6557         my $sandbox = $prevent_xss &&
6558                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6559
6560         # serve text/* as text/plain
6561         if ($prevent_xss &&
6562             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6563              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6564                 my $rest = $1;
6565                 $rest = defined $rest ? $rest : '';
6566                 $type = "text/plain$rest";
6567         }
6568
6569         print $cgi->header(
6570                 -type => $type,
6571                 -expires => $expires,
6572                 -content_disposition =>
6573                         ($sandbox ? 'attachment' : 'inline')
6574                         . '; filename="' . $save_as . '"');
6575         local $/ = undef;
6576         binmode STDOUT, ':raw';
6577         print <$fd>;
6578         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6579         close $fd;
6580 }
6581
6582 sub git_blob {
6583         my $expires;
6584
6585         if (!defined $hash) {
6586                 if (defined $file_name) {
6587                         my $base = $hash_base || git_get_head_hash($project);
6588                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6589                                 or die_error(404, "Cannot find file");
6590                 } else {
6591                         die_error(400, "No file name defined");
6592                 }
6593         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6594                 # blobs defined by non-textual hash id's can be cached
6595                 $expires = "+1d";
6596         }
6597
6598         my $have_blame = gitweb_check_feature('blame');
6599         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6600                 or die_error(500, "Couldn't cat $file_name, $hash");
6601         my $mimetype = blob_mimetype($fd, $file_name);
6602         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6603         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6604                 close $fd;
6605                 return git_blob_plain($mimetype);
6606         }
6607         # we can have blame only for text/* mimetype
6608         $have_blame &&= ($mimetype =~ m!^text/!);
6609
6610         my $highlight = gitweb_check_feature('highlight');
6611         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6612         $fd = run_highlighter($fd, $highlight, $syntax)
6613                 if $syntax;
6614
6615         git_header_html(undef, $expires);
6616         my $formats_nav = '';
6617         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6618                 if (defined $file_name) {
6619                         if ($have_blame) {
6620                                 $formats_nav .=
6621                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6622                                                 "blame") .
6623                                         " | ";
6624                         }
6625                         $formats_nav .=
6626                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6627                                         "history") .
6628                                 " | " .
6629                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6630                                         "raw") .
6631                                 " | " .
6632                                 $cgi->a({-href => href(action=>"blob",
6633                                                        hash_base=>"HEAD", file_name=>$file_name)},
6634                                         "HEAD");
6635                 } else {
6636                         $formats_nav .=
6637                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6638                                         "raw");
6639                 }
6640                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6641                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6642         } else {
6643                 print "<div class=\"page_nav\">\n" .
6644                       "<br/><br/></div>\n" .
6645                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6646         }
6647         git_print_page_path($file_name, "blob", $hash_base);
6648         print "<div class=\"page_body\">\n";
6649         if ($mimetype =~ m!^image/!) {
6650                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6651                 if ($file_name) {
6652                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6653                 }
6654                 print qq! src="! .
6655                       href(action=>"blob_plain", hash=>$hash,
6656                            hash_base=>$hash_base, file_name=>$file_name) .
6657                       qq!" />\n!;
6658         } else {
6659                 my $nr;
6660                 while (my $line = <$fd>) {
6661                         chomp $line;
6662                         $nr++;
6663                         $line = untabify($line);
6664                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6665                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6666                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6667                 }
6668         }
6669         close $fd
6670                 or print "Reading blob failed.\n";
6671         print "</div>";
6672         git_footer_html();
6673 }
6674
6675 sub git_tree {
6676         if (!defined $hash_base) {
6677                 $hash_base = "HEAD";
6678         }
6679         if (!defined $hash) {
6680                 if (defined $file_name) {
6681                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6682                 } else {
6683                         $hash = $hash_base;
6684                 }
6685         }
6686         die_error(404, "No such tree") unless defined($hash);
6687
6688         my $show_sizes = gitweb_check_feature('show-sizes');
6689         my $have_blame = gitweb_check_feature('blame');
6690
6691         my @entries = ();
6692         {
6693                 local $/ = "\0";
6694                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6695                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6696                         or die_error(500, "Open git-ls-tree failed");
6697                 @entries = map { chomp; $_ } <$fd>;
6698                 close $fd
6699                         or die_error(404, "Reading tree failed");
6700         }
6701
6702         my $refs = git_get_references();
6703         my $ref = format_ref_marker($refs, $hash_base);
6704         git_header_html();
6705         my $basedir = '';
6706         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6707                 my @views_nav = ();
6708                 if (defined $file_name) {
6709                         push @views_nav,
6710                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6711                                         "history"),
6712                                 $cgi->a({-href => href(action=>"tree",
6713                                                        hash_base=>"HEAD", file_name=>$file_name)},
6714                                         "HEAD"),
6715                 }
6716                 my $snapshot_links = format_snapshot_links($hash);
6717                 if (defined $snapshot_links) {
6718                         # FIXME: Should be available when we have no hash base as well.
6719                         push @views_nav, $snapshot_links;
6720                 }
6721                 git_print_page_nav('tree','', $hash_base, undef, undef,
6722                                    join(' | ', @views_nav));
6723                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6724         } else {
6725                 undef $hash_base;
6726                 print "<div class=\"page_nav\">\n";
6727                 print "<br/><br/></div>\n";
6728                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6729         }
6730         if (defined $file_name) {
6731                 $basedir = $file_name;
6732                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6733                         $basedir .= '/';
6734                 }
6735                 git_print_page_path($file_name, 'tree', $hash_base);
6736         }
6737         print "<div class=\"page_body\">\n";
6738         print "<table class=\"tree\">\n";
6739         my $alternate = 1;
6740         # '..' (top directory) link if possible
6741         if (defined $hash_base &&
6742             defined $file_name && $file_name =~ m![^/]+$!) {
6743                 if ($alternate) {
6744                         print "<tr class=\"dark\">\n";
6745                 } else {
6746                         print "<tr class=\"light\">\n";
6747                 }
6748                 $alternate ^= 1;
6749
6750                 my $up = $file_name;
6751                 $up =~ s!/?[^/]+$!!;
6752                 undef $up unless $up;
6753                 # based on git_print_tree_entry
6754                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6755                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6756                 print '<td class="list">';
6757                 print $cgi->a({-href => href(action=>"tree",
6758                                              hash_base=>$hash_base,
6759                                              file_name=>$up)},
6760                               "..");
6761                 print "</td>\n";
6762                 print "<td class=\"link\"></td>\n";
6763
6764                 print "</tr>\n";
6765         }
6766         foreach my $line (@entries) {
6767                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6768
6769                 if ($alternate) {
6770                         print "<tr class=\"dark\">\n";
6771                 } else {
6772                         print "<tr class=\"light\">\n";
6773                 }
6774                 $alternate ^= 1;
6775
6776                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6777
6778                 print "</tr>\n";
6779         }
6780         print "</table>\n" .
6781               "</div>";
6782         git_footer_html();
6783 }
6784
6785 sub snapshot_name {
6786         my ($project, $hash) = @_;
6787
6788         # path/to/project.git  -> project
6789         # path/to/project/.git -> project
6790         my $name = to_utf8($project);
6791         $name =~ s,([^/])/*\.git$,$1,;
6792         $name = basename($name);
6793         # sanitize name
6794         $name =~ s/[[:cntrl:]]/?/g;
6795
6796         my $ver = $hash;
6797         if ($hash =~ /^[0-9a-fA-F]+$/) {
6798                 # shorten SHA-1 hash
6799                 my $full_hash = git_get_full_hash($project, $hash);
6800                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6801                         $ver = git_get_short_hash($project, $hash);
6802                 }
6803         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6804                 # tags don't need shortened SHA-1 hash
6805                 $ver = $1;
6806         } else {
6807                 # branches and other need shortened SHA-1 hash
6808                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6809                         $ver = $1;
6810                 }
6811                 $ver .= '-' . git_get_short_hash($project, $hash);
6812         }
6813         # in case of hierarchical branch names
6814         $ver =~ s!/!.!g;
6815
6816         # name = project-version_string
6817         $name = "$name-$ver";
6818
6819         return wantarray ? ($name, $name) : $name;
6820 }
6821
6822 sub git_snapshot {
6823         my $format = $input_params{'snapshot_format'};
6824         if (!@snapshot_fmts) {
6825                 die_error(403, "Snapshots not allowed");
6826         }
6827         # default to first supported snapshot format
6828         $format ||= $snapshot_fmts[0];
6829         if ($format !~ m/^[a-z0-9]+$/) {
6830                 die_error(400, "Invalid snapshot format parameter");
6831         } elsif (!exists($known_snapshot_formats{$format})) {
6832                 die_error(400, "Unknown snapshot format");
6833         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6834                 die_error(403, "Snapshot format not allowed");
6835         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6836                 die_error(403, "Unsupported snapshot format");
6837         }
6838
6839         my $type = git_get_type("$hash^{}");
6840         if (!$type) {
6841                 die_error(404, 'Object does not exist');
6842         }  elsif ($type eq 'blob') {
6843                 die_error(400, 'Object is not a tree-ish');
6844         }
6845
6846         my ($name, $prefix) = snapshot_name($project, $hash);
6847         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6848         my $cmd = quote_command(
6849                 git_cmd(), 'archive',
6850                 "--format=$known_snapshot_formats{$format}{'format'}",
6851                 "--prefix=$prefix/", $hash);
6852         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6853                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6854         }
6855
6856         $filename =~ s/(["\\])/\\$1/g;
6857         print $cgi->header(
6858                 -type => $known_snapshot_formats{$format}{'type'},
6859                 -content_disposition => 'inline; filename="' . $filename . '"',
6860                 -status => '200 OK');
6861
6862         open my $fd, "-|", $cmd
6863                 or die_error(500, "Execute git-archive failed");
6864         binmode STDOUT, ':raw';
6865         print <$fd>;
6866         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6867         close $fd;
6868 }
6869
6870 sub git_log_generic {
6871         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6872
6873         my $head = git_get_head_hash($project);
6874         if (!defined $base) {
6875                 $base = $head;
6876         }
6877         if (!defined $page) {
6878                 $page = 0;
6879         }
6880         my $refs = git_get_references();
6881
6882         my $commit_hash = $base;
6883         if (defined $parent) {
6884                 $commit_hash = "$parent..$base";
6885         }
6886         my @commitlist =
6887                 parse_commits($commit_hash, 101, (100 * $page),
6888                               defined $file_name ? ($file_name, "--full-history") : ());
6889
6890         my $ftype;
6891         if (!defined $file_hash && defined $file_name) {
6892                 # some commits could have deleted file in question,
6893                 # and not have it in tree, but one of them has to have it
6894                 for (my $i = 0; $i < @commitlist; $i++) {
6895                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6896                         last if defined $file_hash;
6897                 }
6898         }
6899         if (defined $file_hash) {
6900                 $ftype = git_get_type($file_hash);
6901         }
6902         if (defined $file_name && !defined $ftype) {
6903                 die_error(500, "Unknown type of object");
6904         }
6905         my %co;
6906         if (defined $file_name) {
6907                 %co = parse_commit($base)
6908                         or die_error(404, "Unknown commit object");
6909         }
6910
6911
6912         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6913         my $next_link = '';
6914         if ($#commitlist >= 100) {
6915                 $next_link =
6916                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6917                                  -accesskey => "n", -title => "Alt-n"}, "next");
6918         }
6919         my $patch_max = gitweb_get_feature('patches');
6920         if ($patch_max && !defined $file_name) {
6921                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6922                         $paging_nav .= " &sdot; " .
6923                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6924                                         "patches");
6925                 }
6926         }
6927
6928         git_header_html();
6929         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6930         if (defined $file_name) {
6931                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6932         } else {
6933                 git_print_header_div('summary', $project)
6934         }
6935         git_print_page_path($file_name, $ftype, $hash_base)
6936                 if (defined $file_name);
6937
6938         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6939                      $file_name, $file_hash, $ftype);
6940
6941         git_footer_html();
6942 }
6943
6944 sub git_log {
6945         git_log_generic('log', \&git_log_body,
6946                         $hash, $hash_parent);
6947 }
6948
6949 sub git_commit {
6950         $hash ||= $hash_base || "HEAD";
6951         my %co = parse_commit($hash)
6952             or die_error(404, "Unknown commit object");
6953
6954         my $parent  = $co{'parent'};
6955         my $parents = $co{'parents'}; # listref
6956
6957         # we need to prepare $formats_nav before any parameter munging
6958         my $formats_nav;
6959         if (!defined $parent) {
6960                 # --root commitdiff
6961                 $formats_nav .= '(initial)';
6962         } elsif (@$parents == 1) {
6963                 # single parent commit
6964                 $formats_nav .=
6965                         '(parent: ' .
6966                         $cgi->a({-href => href(action=>"commit",
6967                                                hash=>$parent)},
6968                                 esc_html(substr($parent, 0, 7))) .
6969                         ')';
6970         } else {
6971                 # merge commit
6972                 $formats_nav .=
6973                         '(merge: ' .
6974                         join(' ', map {
6975                                 $cgi->a({-href => href(action=>"commit",
6976                                                        hash=>$_)},
6977                                         esc_html(substr($_, 0, 7)));
6978                         } @$parents ) .
6979                         ')';
6980         }
6981         if (gitweb_check_feature('patches') && @$parents <= 1) {
6982                 $formats_nav .= " | " .
6983                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6984                                 "patch");
6985         }
6986
6987         if (!defined $parent) {
6988                 $parent = "--root";
6989         }
6990         my @difftree;
6991         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6992                 @diff_opts,
6993                 (@$parents <= 1 ? $parent : '-c'),
6994                 $hash, "--"
6995                 or die_error(500, "Open git-diff-tree failed");
6996         @difftree = map { chomp; $_ } <$fd>;
6997         close $fd or die_error(404, "Reading git-diff-tree failed");
6998
6999         # non-textual hash id's can be cached
7000         my $expires;
7001         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7002                 $expires = "+1d";
7003         }
7004         my $refs = git_get_references();
7005         my $ref = format_ref_marker($refs, $co{'id'});
7006
7007         git_header_html(undef, $expires);
7008         git_print_page_nav('commit', '',
7009                            $hash, $co{'tree'}, $hash,
7010                            $formats_nav);
7011
7012         if (defined $co{'parent'}) {
7013                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7014         } else {
7015                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7016         }
7017         print "<div class=\"title_text\">\n" .
7018               "<table class=\"object_header\">\n";
7019         git_print_authorship_rows(\%co);
7020         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7021         print "<tr>" .
7022               "<td>tree</td>" .
7023               "<td class=\"sha1\">" .
7024               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7025                        class => "list"}, $co{'tree'}) .
7026               "</td>" .
7027               "<td class=\"link\">" .
7028               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7029                       "tree");
7030         my $snapshot_links = format_snapshot_links($hash);
7031         if (defined $snapshot_links) {
7032                 print " | " . $snapshot_links;
7033         }
7034         print "</td>" .
7035               "</tr>\n";
7036
7037         foreach my $par (@$parents) {
7038                 print "<tr>" .
7039                       "<td>parent</td>" .
7040                       "<td class=\"sha1\">" .
7041                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7042                                class => "list"}, $par) .
7043                       "</td>" .
7044                       "<td class=\"link\">" .
7045                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7046                       " | " .
7047                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7048                       "</td>" .
7049                       "</tr>\n";
7050         }
7051         print "</table>".
7052               "</div>\n";
7053
7054         print "<div class=\"page_body\">\n";
7055         git_print_log($co{'comment'});
7056         print "</div>\n";
7057
7058         git_difftree_body(\@difftree, $hash, @$parents);
7059
7060         git_footer_html();
7061 }
7062
7063 sub git_object {
7064         # object is defined by:
7065         # - hash or hash_base alone
7066         # - hash_base and file_name
7067         my $type;
7068
7069         # - hash or hash_base alone
7070         if ($hash || ($hash_base && !defined $file_name)) {
7071                 my $object_id = $hash || $hash_base;
7072
7073                 open my $fd, "-|", quote_command(
7074                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7075                         or die_error(404, "Object does not exist");
7076                 $type = <$fd>;
7077                 chomp $type;
7078                 close $fd
7079                         or die_error(404, "Object does not exist");
7080
7081         # - hash_base and file_name
7082         } elsif ($hash_base && defined $file_name) {
7083                 $file_name =~ s,/+$,,;
7084
7085                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7086                         or die_error(404, "Base object does not exist");
7087
7088                 # here errors should not hapen
7089                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7090                         or die_error(500, "Open git-ls-tree failed");
7091                 my $line = <$fd>;
7092                 close $fd;
7093
7094                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7095                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7096                         die_error(404, "File or directory for given base does not exist");
7097                 }
7098                 $type = $2;
7099                 $hash = $3;
7100         } else {
7101                 die_error(400, "Not enough information to find object");
7102         }
7103
7104         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7105                                           hash=>$hash, hash_base=>$hash_base,
7106                                           file_name=>$file_name),
7107                              -status => '302 Found');
7108 }
7109
7110 sub git_blobdiff {
7111         my $format = shift || 'html';
7112         my $diff_style = $input_params{'diff_style'} || 'inline';
7113
7114         my $fd;
7115         my @difftree;
7116         my %diffinfo;
7117         my $expires;
7118
7119         # preparing $fd and %diffinfo for git_patchset_body
7120         # new style URI
7121         if (defined $hash_base && defined $hash_parent_base) {
7122                 if (defined $file_name) {
7123                         # read raw output
7124                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7125                                 $hash_parent_base, $hash_base,
7126                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7127                                 or die_error(500, "Open git-diff-tree failed");
7128                         @difftree = map { chomp; $_ } <$fd>;
7129                         close $fd
7130                                 or die_error(404, "Reading git-diff-tree failed");
7131                         @difftree
7132                                 or die_error(404, "Blob diff not found");
7133
7134                 } elsif (defined $hash &&
7135                          $hash =~ /[0-9a-fA-F]{40}/) {
7136                         # try to find filename from $hash
7137
7138                         # read filtered raw output
7139                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7140                                 $hash_parent_base, $hash_base, "--"
7141                                 or die_error(500, "Open git-diff-tree failed");
7142                         @difftree =
7143                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7144                                 # $hash == to_id
7145                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7146                                 map { chomp; $_ } <$fd>;
7147                         close $fd
7148                                 or die_error(404, "Reading git-diff-tree failed");
7149                         @difftree
7150                                 or die_error(404, "Blob diff not found");
7151
7152                 } else {
7153                         die_error(400, "Missing one of the blob diff parameters");
7154                 }
7155
7156                 if (@difftree > 1) {
7157                         die_error(400, "Ambiguous blob diff specification");
7158                 }
7159
7160                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7161                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7162                 $file_name   ||= $diffinfo{'to_file'};
7163
7164                 $hash_parent ||= $diffinfo{'from_id'};
7165                 $hash        ||= $diffinfo{'to_id'};
7166
7167                 # non-textual hash id's can be cached
7168                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7169                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7170                         $expires = '+1d';
7171                 }
7172
7173                 # open patch output
7174                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7175                         '-p', ($format eq 'html' ? "--full-index" : ()),
7176                         $hash_parent_base, $hash_base,
7177                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7178                         or die_error(500, "Open git-diff-tree failed");
7179         }
7180
7181         # old/legacy style URI -- not generated anymore since 1.4.3.
7182         if (!%diffinfo) {
7183                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7184         }
7185
7186         # header
7187         if ($format eq 'html') {
7188                 my $formats_nav =
7189                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7190                                 "raw");
7191                 $formats_nav .= diff_style_nav($diff_style);
7192                 git_header_html(undef, $expires);
7193                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7194                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7195                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7196                 } else {
7197                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7198                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7199                 }
7200                 if (defined $file_name) {
7201                         git_print_page_path($file_name, "blob", $hash_base);
7202                 } else {
7203                         print "<div class=\"page_path\"></div>\n";
7204                 }
7205
7206         } elsif ($format eq 'plain') {
7207                 print $cgi->header(
7208                         -type => 'text/plain',
7209                         -charset => 'utf-8',
7210                         -expires => $expires,
7211                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7212
7213                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7214
7215         } else {
7216                 die_error(400, "Unknown blobdiff format");
7217         }
7218
7219         # patch
7220         if ($format eq 'html') {
7221                 print "<div class=\"page_body\">\n";
7222
7223                 git_patchset_body($fd, $diff_style,
7224                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7225                 close $fd;
7226
7227                 print "</div>\n"; # class="page_body"
7228                 git_footer_html();
7229
7230         } else {
7231                 while (my $line = <$fd>) {
7232                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7233                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7234
7235                         print $line;
7236
7237                         last if $line =~ m!^\+\+\+!;
7238                 }
7239                 local $/ = undef;
7240                 print <$fd>;
7241                 close $fd;
7242         }
7243 }
7244
7245 sub git_blobdiff_plain {
7246         git_blobdiff('plain');
7247 }
7248
7249 # assumes that it is added as later part of already existing navigation,
7250 # so it returns "| foo | bar" rather than just "foo | bar"
7251 sub diff_style_nav {
7252         my ($diff_style, $is_combined) = @_;
7253         $diff_style ||= 'inline';
7254
7255         return "" if ($is_combined);
7256
7257         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7258         my %styles = @styles;
7259         @styles =
7260                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7261
7262         return join '',
7263                 map { " | ".$_ }
7264                 map {
7265                         $_ eq $diff_style ? $styles{$_} :
7266                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7267                 } @styles;
7268 }
7269
7270 sub git_commitdiff {
7271         my %params = @_;
7272         my $format = $params{-format} || 'html';
7273         my $diff_style = $input_params{'diff_style'} || 'inline';
7274
7275         my ($patch_max) = gitweb_get_feature('patches');
7276         if ($format eq 'patch') {
7277                 die_error(403, "Patch view not allowed") unless $patch_max;
7278         }
7279
7280         $hash ||= $hash_base || "HEAD";
7281         my %co = parse_commit($hash)
7282             or die_error(404, "Unknown commit object");
7283
7284         # choose format for commitdiff for merge
7285         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7286                 $hash_parent = '--cc';
7287         }
7288         # we need to prepare $formats_nav before almost any parameter munging
7289         my $formats_nav;
7290         if ($format eq 'html') {
7291                 $formats_nav =
7292                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7293                                 "raw");
7294                 if ($patch_max && @{$co{'parents'}} <= 1) {
7295                         $formats_nav .= " | " .
7296                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7297                                         "patch");
7298                 }
7299                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7300
7301                 if (defined $hash_parent &&
7302                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7303                         # commitdiff with two commits given
7304                         my $hash_parent_short = $hash_parent;
7305                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7306                                 $hash_parent_short = substr($hash_parent, 0, 7);
7307                         }
7308                         $formats_nav .=
7309                                 ' (from';
7310                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7311                                 if ($co{'parents'}[$i] eq $hash_parent) {
7312                                         $formats_nav .= ' parent ' . ($i+1);
7313                                         last;
7314                                 }
7315                         }
7316                         $formats_nav .= ': ' .
7317                                 $cgi->a({-href => href(-replay=>1,
7318                                                        hash=>$hash_parent, hash_base=>undef)},
7319                                         esc_html($hash_parent_short)) .
7320                                 ')';
7321                 } elsif (!$co{'parent'}) {
7322                         # --root commitdiff
7323                         $formats_nav .= ' (initial)';
7324                 } elsif (scalar @{$co{'parents'}} == 1) {
7325                         # single parent commit
7326                         $formats_nav .=
7327                                 ' (parent: ' .
7328                                 $cgi->a({-href => href(-replay=>1,
7329                                                        hash=>$co{'parent'}, hash_base=>undef)},
7330                                         esc_html(substr($co{'parent'}, 0, 7))) .
7331                                 ')';
7332                 } else {
7333                         # merge commit
7334                         if ($hash_parent eq '--cc') {
7335                                 $formats_nav .= ' | ' .
7336                                         $cgi->a({-href => href(-replay=>1,
7337                                                                hash=>$hash, hash_parent=>'-c')},
7338                                                 'combined');
7339                         } else { # $hash_parent eq '-c'
7340                                 $formats_nav .= ' | ' .
7341                                         $cgi->a({-href => href(-replay=>1,
7342                                                                hash=>$hash, hash_parent=>'--cc')},
7343                                                 'compact');
7344                         }
7345                         $formats_nav .=
7346                                 ' (merge: ' .
7347                                 join(' ', map {
7348                                         $cgi->a({-href => href(-replay=>1,
7349                                                                hash=>$_, hash_base=>undef)},
7350                                                 esc_html(substr($_, 0, 7)));
7351                                 } @{$co{'parents'}} ) .
7352                                 ')';
7353                 }
7354         }
7355
7356         my $hash_parent_param = $hash_parent;
7357         if (!defined $hash_parent_param) {
7358                 # --cc for multiple parents, --root for parentless
7359                 $hash_parent_param =
7360                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7361         }
7362
7363         # read commitdiff
7364         my $fd;
7365         my @difftree;
7366         if ($format eq 'html') {
7367                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7368                         "--no-commit-id", "--patch-with-raw", "--full-index",
7369                         $hash_parent_param, $hash, "--"
7370                         or die_error(500, "Open git-diff-tree failed");
7371
7372                 while (my $line = <$fd>) {
7373                         chomp $line;
7374                         # empty line ends raw part of diff-tree output
7375                         last unless $line;
7376                         push @difftree, scalar parse_difftree_raw_line($line);
7377                 }
7378
7379         } elsif ($format eq 'plain') {
7380                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7381                         '-p', $hash_parent_param, $hash, "--"
7382                         or die_error(500, "Open git-diff-tree failed");
7383         } elsif ($format eq 'patch') {
7384                 # For commit ranges, we limit the output to the number of
7385                 # patches specified in the 'patches' feature.
7386                 # For single commits, we limit the output to a single patch,
7387                 # diverging from the git-format-patch default.
7388                 my @commit_spec = ();
7389                 if ($hash_parent) {
7390                         if ($patch_max > 0) {
7391                                 push @commit_spec, "-$patch_max";
7392                         }
7393                         push @commit_spec, '-n', "$hash_parent..$hash";
7394                 } else {
7395                         if ($params{-single}) {
7396                                 push @commit_spec, '-1';
7397                         } else {
7398                                 if ($patch_max > 0) {
7399                                         push @commit_spec, "-$patch_max";
7400                                 }
7401                                 push @commit_spec, "-n";
7402                         }
7403                         push @commit_spec, '--root', $hash;
7404                 }
7405                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7406                         '--encoding=utf8', '--stdout', @commit_spec
7407                         or die_error(500, "Open git-format-patch failed");
7408         } else {
7409                 die_error(400, "Unknown commitdiff format");
7410         }
7411
7412         # non-textual hash id's can be cached
7413         my $expires;
7414         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7415                 $expires = "+1d";
7416         }
7417
7418         # write commit message
7419         if ($format eq 'html') {
7420                 my $refs = git_get_references();
7421                 my $ref = format_ref_marker($refs, $co{'id'});
7422
7423                 git_header_html(undef, $expires);
7424                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7425                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7426                 print "<div class=\"title_text\">\n" .
7427                       "<table class=\"object_header\">\n";
7428                 git_print_authorship_rows(\%co);
7429                 print "</table>".
7430                       "</div>\n";
7431                 print "<div class=\"page_body\">\n";
7432                 if (@{$co{'comment'}} > 1) {
7433                         print "<div class=\"log\">\n";
7434                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7435                         print "</div>\n"; # class="log"
7436                 }
7437
7438         } elsif ($format eq 'plain') {
7439                 my $refs = git_get_references("tags");
7440                 my $tagname = git_get_rev_name_tags($hash);
7441                 my $filename = basename($project) . "-$hash.patch";
7442
7443                 print $cgi->header(
7444                         -type => 'text/plain',
7445                         -charset => 'utf-8',
7446                         -expires => $expires,
7447                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7448                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7449                 print "From: " . to_utf8($co{'author'}) . "\n";
7450                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7451                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7452
7453                 print "X-Git-Tag: $tagname\n" if $tagname;
7454                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7455
7456                 foreach my $line (@{$co{'comment'}}) {
7457                         print to_utf8($line) . "\n";
7458                 }
7459                 print "---\n\n";
7460         } elsif ($format eq 'patch') {
7461                 my $filename = basename($project) . "-$hash.patch";
7462
7463                 print $cgi->header(
7464                         -type => 'text/plain',
7465                         -charset => 'utf-8',
7466                         -expires => $expires,
7467                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7468         }
7469
7470         # write patch
7471         if ($format eq 'html') {
7472                 my $use_parents = !defined $hash_parent ||
7473                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7474                 git_difftree_body(\@difftree, $hash,
7475                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7476                 print "<br/>\n";
7477
7478                 git_patchset_body($fd, $diff_style,
7479                                   \@difftree, $hash,
7480                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7481                 close $fd;
7482                 print "</div>\n"; # class="page_body"
7483                 git_footer_html();
7484
7485         } elsif ($format eq 'plain') {
7486                 local $/ = undef;
7487                 print <$fd>;
7488                 close $fd
7489                         or print "Reading git-diff-tree failed\n";
7490         } elsif ($format eq 'patch') {
7491                 local $/ = undef;
7492                 print <$fd>;
7493                 close $fd
7494                         or print "Reading git-format-patch failed\n";
7495         }
7496 }
7497
7498 sub git_commitdiff_plain {
7499         git_commitdiff(-format => 'plain');
7500 }
7501
7502 # format-patch-style patches
7503 sub git_patch {
7504         git_commitdiff(-format => 'patch', -single => 1);
7505 }
7506
7507 sub git_patches {
7508         git_commitdiff(-format => 'patch');
7509 }
7510
7511 sub git_history {
7512         git_log_generic('history', \&git_history_body,
7513                         $hash_base, $hash_parent_base,
7514                         $file_name, $hash);
7515 }
7516
7517 sub git_search {
7518         $searchtype ||= 'commit';
7519
7520         # check if appropriate features are enabled
7521         gitweb_check_feature('search')
7522                 or die_error(403, "Search is disabled");
7523         if ($searchtype eq 'pickaxe') {
7524                 # pickaxe may take all resources of your box and run for several minutes
7525                 # with every query - so decide by yourself how public you make this feature
7526                 gitweb_check_feature('pickaxe')
7527                         or die_error(403, "Pickaxe search is disabled");
7528         }
7529         if ($searchtype eq 'grep') {
7530                 # grep search might be potentially CPU-intensive, too
7531                 gitweb_check_feature('grep')
7532                         or die_error(403, "Grep search is disabled");
7533         }
7534
7535         if (!defined $searchtext) {
7536                 die_error(400, "Text field is empty");
7537         }
7538         if (!defined $hash) {
7539                 $hash = git_get_head_hash($project);
7540         }
7541         my %co = parse_commit($hash);
7542         if (!%co) {
7543                 die_error(404, "Unknown commit object");
7544         }
7545         if (!defined $page) {
7546                 $page = 0;
7547         }
7548
7549         if ($searchtype eq 'commit' ||
7550             $searchtype eq 'author' ||
7551             $searchtype eq 'committer') {
7552                 git_search_message(%co);
7553         } elsif ($searchtype eq 'pickaxe') {
7554                 git_search_changes(%co);
7555         } elsif ($searchtype eq 'grep') {
7556                 git_search_files(%co);
7557         } else {
7558                 die_error(400, "Unknown search type");
7559         }
7560 }
7561
7562 sub git_search_help {
7563         git_header_html();
7564         git_print_page_nav('','', $hash,$hash,$hash);
7565         print <<EOT;
7566 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7567 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7568 the pattern entered is recognized as the POSIX extended
7569 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7570 insensitive).</p>
7571 <dl>
7572 <dt><b>commit</b></dt>
7573 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7574 EOT
7575         my $have_grep = gitweb_check_feature('grep');
7576         if ($have_grep) {
7577                 print <<EOT;
7578 <dt><b>grep</b></dt>
7579 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7580     a different one) are searched for the given pattern. On large trees, this search can take
7581 a while and put some strain on the server, so please use it with some consideration. Note that
7582 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7583 case-sensitive.</dd>
7584 EOT
7585         }
7586         print <<EOT;
7587 <dt><b>author</b></dt>
7588 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7589 <dt><b>committer</b></dt>
7590 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7591 EOT
7592         my $have_pickaxe = gitweb_check_feature('pickaxe');
7593         if ($have_pickaxe) {
7594                 print <<EOT;
7595 <dt><b>pickaxe</b></dt>
7596 <dd>All commits that caused the string to appear or disappear from any file (changes that
7597 added, removed or "modified" the string) will be listed. This search can take a while and
7598 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7599 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7600 EOT
7601         }
7602         print "</dl>\n";
7603         git_footer_html();
7604 }
7605
7606 sub git_shortlog {
7607         git_log_generic('shortlog', \&git_shortlog_body,
7608                         $hash, $hash_parent);
7609 }
7610
7611 ## ......................................................................
7612 ## feeds (RSS, Atom; OPML)
7613
7614 sub git_feed {
7615         my $format = shift || 'atom';
7616         my $have_blame = gitweb_check_feature('blame');
7617
7618         # Atom: http://www.atomenabled.org/developers/syndication/
7619         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7620         if ($format ne 'rss' && $format ne 'atom') {
7621                 die_error(400, "Unknown web feed format");
7622         }
7623
7624         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7625         my $head = $hash || 'HEAD';
7626         my @commitlist = parse_commits($head, 150, 0, $file_name);
7627
7628         my %latest_commit;
7629         my %latest_date;
7630         my $content_type = "application/$format+xml";
7631         if (defined $cgi->http('HTTP_ACCEPT') &&
7632                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7633                 # browser (feed reader) prefers text/xml
7634                 $content_type = 'text/xml';
7635         }
7636         if (defined($commitlist[0])) {
7637                 %latest_commit = %{$commitlist[0]};
7638                 my $latest_epoch = $latest_commit{'committer_epoch'};
7639                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7640                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7641                 if (defined $if_modified) {
7642                         my $since;
7643                         if (eval { require HTTP::Date; 1; }) {
7644                                 $since = HTTP::Date::str2time($if_modified);
7645                         } elsif (eval { require Time::ParseDate; 1; }) {
7646                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7647                         }
7648                         if (defined $since && $latest_epoch <= $since) {
7649                                 print $cgi->header(
7650                                         -type => $content_type,
7651                                         -charset => 'utf-8',
7652                                         -last_modified => $latest_date{'rfc2822'},
7653                                         -status => '304 Not Modified');
7654                                 return;
7655                         }
7656                 }
7657                 print $cgi->header(
7658                         -type => $content_type,
7659                         -charset => 'utf-8',
7660                         -last_modified => $latest_date{'rfc2822'});
7661         } else {
7662                 print $cgi->header(
7663                         -type => $content_type,
7664                         -charset => 'utf-8');
7665         }
7666
7667         # Optimization: skip generating the body if client asks only
7668         # for Last-Modified date.
7669         return if ($cgi->request_method() eq 'HEAD');
7670
7671         # header variables
7672         my $title = "$site_name - $project/$action";
7673         my $feed_type = 'log';
7674         if (defined $hash) {
7675                 $title .= " - '$hash'";
7676                 $feed_type = 'branch log';
7677                 if (defined $file_name) {
7678                         $title .= " :: $file_name";
7679                         $feed_type = 'history';
7680                 }
7681         } elsif (defined $file_name) {
7682                 $title .= " - $file_name";
7683                 $feed_type = 'history';
7684         }
7685         $title .= " $feed_type";
7686         my $descr = git_get_project_description($project);
7687         if (defined $descr) {
7688                 $descr = esc_html($descr);
7689         } else {
7690                 $descr = "$project " .
7691                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7692                          " feed";
7693         }
7694         my $owner = git_get_project_owner($project);
7695         $owner = esc_html($owner);
7696
7697         #header
7698         my $alt_url;
7699         if (defined $file_name) {
7700                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7701         } elsif (defined $hash) {
7702                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7703         } else {
7704                 $alt_url = href(-full=>1, action=>"summary");
7705         }
7706         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7707         if ($format eq 'rss') {
7708                 print <<XML;
7709 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7710 <channel>
7711 XML
7712                 print "<title>$title</title>\n" .
7713                       "<link>$alt_url</link>\n" .
7714                       "<description>$descr</description>\n" .
7715                       "<language>en</language>\n" .
7716                       # project owner is responsible for 'editorial' content
7717                       "<managingEditor>$owner</managingEditor>\n";
7718                 if (defined $logo || defined $favicon) {
7719                         # prefer the logo to the favicon, since RSS
7720                         # doesn't allow both
7721                         my $img = esc_url($logo || $favicon);
7722                         print "<image>\n" .
7723                               "<url>$img</url>\n" .
7724                               "<title>$title</title>\n" .
7725                               "<link>$alt_url</link>\n" .
7726                               "</image>\n";
7727                 }
7728                 if (%latest_date) {
7729                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7730                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7731                 }
7732                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7733         } elsif ($format eq 'atom') {
7734                 print <<XML;
7735 <feed xmlns="http://www.w3.org/2005/Atom">
7736 XML
7737                 print "<title>$title</title>\n" .
7738                       "<subtitle>$descr</subtitle>\n" .
7739                       '<link rel="alternate" type="text/html" href="' .
7740                       $alt_url . '" />' . "\n" .
7741                       '<link rel="self" type="' . $content_type . '" href="' .
7742                       $cgi->self_url() . '" />' . "\n" .
7743                       "<id>" . href(-full=>1) . "</id>\n" .
7744                       # use project owner for feed author
7745                       "<author><name>$owner</name></author>\n";
7746                 if (defined $favicon) {
7747                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7748                 }
7749                 if (defined $logo) {
7750                         # not twice as wide as tall: 72 x 27 pixels
7751                         print "<logo>" . esc_url($logo) . "</logo>\n";
7752                 }
7753                 if (! %latest_date) {
7754                         # dummy date to keep the feed valid until commits trickle in:
7755                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7756                 } else {
7757                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7758                 }
7759                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7760         }
7761
7762         # contents
7763         for (my $i = 0; $i <= $#commitlist; $i++) {
7764                 my %co = %{$commitlist[$i]};
7765                 my $commit = $co{'id'};
7766                 # we read 150, we always show 30 and the ones more recent than 48 hours
7767                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7768                         last;
7769                 }
7770                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7771
7772                 # get list of changed files
7773                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7774                         $co{'parent'} || "--root",
7775                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7776                         or next;
7777                 my @difftree = map { chomp; $_ } <$fd>;
7778                 close $fd
7779                         or next;
7780
7781                 # print element (entry, item)
7782                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7783                 if ($format eq 'rss') {
7784                         print "<item>\n" .
7785                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7786                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7787                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7788                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7789                               "<link>$co_url</link>\n" .
7790                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7791                               "<content:encoded>" .
7792                               "<![CDATA[\n";
7793                 } elsif ($format eq 'atom') {
7794                         print "<entry>\n" .
7795                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7796                               "<updated>$cd{'iso-8601'}</updated>\n" .
7797                               "<author>\n" .
7798                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7799                         if ($co{'author_email'}) {
7800                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7801                         }
7802                         print "</author>\n" .
7803                               # use committer for contributor
7804                               "<contributor>\n" .
7805                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7806                         if ($co{'committer_email'}) {
7807                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7808                         }
7809                         print "</contributor>\n" .
7810                               "<published>$cd{'iso-8601'}</published>\n" .
7811                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7812                               "<id>$co_url</id>\n" .
7813                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7814                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7815                 }
7816                 my $comment = $co{'comment'};
7817                 print "<pre>\n";
7818                 foreach my $line (@$comment) {
7819                         $line = esc_html($line);
7820                         print "$line\n";
7821                 }
7822                 print "</pre><ul>\n";
7823                 foreach my $difftree_line (@difftree) {
7824                         my %difftree = parse_difftree_raw_line($difftree_line);
7825                         next if !$difftree{'from_id'};
7826
7827                         my $file = $difftree{'file'} || $difftree{'to_file'};
7828
7829                         print "<li>" .
7830                               "[" .
7831                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7832                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7833                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7834                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7835                                       -title => "diff"}, 'D');
7836                         if ($have_blame) {
7837                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7838                                                              file_name=>$file, hash_base=>$commit),
7839                                               -title => "blame"}, 'B');
7840                         }
7841                         # if this is not a feed of a file history
7842                         if (!defined $file_name || $file_name ne $file) {
7843                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7844                                                              file_name=>$file, hash=>$commit),
7845                                               -title => "history"}, 'H');
7846                         }
7847                         $file = esc_path($file);
7848                         print "] ".
7849                               "$file</li>\n";
7850                 }
7851                 if ($format eq 'rss') {
7852                         print "</ul>]]>\n" .
7853                               "</content:encoded>\n" .
7854                               "</item>\n";
7855                 } elsif ($format eq 'atom') {
7856                         print "</ul>\n</div>\n" .
7857                               "</content>\n" .
7858                               "</entry>\n";
7859                 }
7860         }
7861
7862         # end of feed
7863         if ($format eq 'rss') {
7864                 print "</channel>\n</rss>\n";
7865         } elsif ($format eq 'atom') {
7866                 print "</feed>\n";
7867         }
7868 }
7869
7870 sub git_rss {
7871         git_feed('rss');
7872 }
7873
7874 sub git_atom {
7875         git_feed('atom');
7876 }
7877
7878 sub git_opml {
7879         my @list = git_get_projects_list();
7880         if (!@list) {
7881                 die_error(404, "No projects found");
7882         }
7883
7884         print $cgi->header(
7885                 -type => 'text/xml',
7886                 -charset => 'utf-8',
7887                 -content_disposition => 'inline; filename="opml.xml"');
7888
7889         my $title = esc_html($site_name);
7890         print <<XML;
7891 <?xml version="1.0" encoding="utf-8"?>
7892 <opml version="1.0">
7893 <head>
7894   <title>$title OPML Export</title>
7895 </head>
7896 <body>
7897 <outline text="git RSS feeds">
7898 XML
7899
7900         foreach my $pr (@list) {
7901                 my %proj = %$pr;
7902                 my $head = git_get_head_hash($proj{'path'});
7903                 if (!defined $head) {
7904                         next;
7905                 }
7906                 $git_dir = "$projectroot/$proj{'path'}";
7907                 my %co = parse_commit($head);
7908                 if (!%co) {
7909                         next;
7910                 }
7911
7912                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7913                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7914                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7915                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7916         }
7917         print <<XML;
7918 </outline>
7919 </body>
7920 </opml>
7921 XML
7922 }