gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         project_filter => "pf",
 764         # this must be last entry (for manipulation from JavaScript)
 765         javascript => "js"
 766 );
 767 our %cgi_param_mapping = @cgi_param_mapping;
 768
 769 # we will also need to know the possible actions, for validation
 770 our %actions = (
 771         "blame" => \&git_blame,
 772         "blame_incremental" => \&git_blame_incremental,
 773         "blame_data" => \&git_blame_data,
 774         "blobdiff" => \&git_blobdiff,
 775         "blobdiff_plain" => \&git_blobdiff_plain,
 776         "blob" => \&git_blob,
 777         "blob_plain" => \&git_blob_plain,
 778         "commitdiff" => \&git_commitdiff,
 779         "commitdiff_plain" => \&git_commitdiff_plain,
 780         "commit" => \&git_commit,
 781         "forks" => \&git_forks,
 782         "heads" => \&git_heads,
 783         "history" => \&git_history,
 784         "log" => \&git_log,
 785         "patch" => \&git_patch,
 786         "patches" => \&git_patches,
 787         "remotes" => \&git_remotes,
 788         "rss" => \&git_rss,
 789         "atom" => \&git_atom,
 790         "search" => \&git_search,
 791         "search_help" => \&git_search_help,
 792         "shortlog" => \&git_shortlog,
 793         "summary" => \&git_summary,
 794         "tag" => \&git_tag,
 795         "tags" => \&git_tags,
 796         "tree" => \&git_tree,
 797         "snapshot" => \&git_snapshot,
 798         "object" => \&git_object,
 799         # those below don't need $project
 800         "opml" => \&git_opml,
 801         "project_list" => \&git_project_list,
 802         "project_index" => \&git_project_index,
 803 );
 804
 805 # finally, we have the hash of allowed extra_options for the commands that
 806 # allow them
 807 our %allowed_options = (
 808         "--no-merges" => [ qw(rss atom log shortlog history) ],
 809 );
 810
 811 # fill %input_params with the CGI parameters. All values except for 'opt'
 812 # should be single values, but opt can be an array. We should probably
 813 # build an array of parameters that can be multi-valued, but since for the time
 814 # being it's only this one, we just single it out
 815 sub evaluate_query_params {
 816         our $cgi;
 817
 818         while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                 if ($symbol eq 'opt') {
 820                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 823                 }
 824         }
 825 }
 826
 827 # now read PATH_INFO and update the parameter list for missing parameters
 828 sub evaluate_path_info {
 829         return if defined $input_params{'project'};
 830         return if !$path_info;
 831         $path_info =~ s,^/+,,;
 832         return if !$path_info;
 833
 834         # find which part of PATH_INFO is project
 835         my $project = $path_info;
 836         $project =~ s,/+$,,;
 837         while ($project && !check_head_link("$projectroot/$project")) {
 838                 $project =~ s,/*[^/]*$,,;
 839         }
 840         return unless $project;
 841         $input_params{'project'} = $project;
 842
 843         # do not change any parameters if an action is given using the query string
 844         return if $input_params{'action'};
 845         $path_info =~ s,^\Q$project\E/*,,;
 846
 847         # next, check if we have an action
 848         my $action = $path_info;
 849         $action =~ s,/.*$,,;
 850         if (exists $actions{$action}) {
 851                 $path_info =~ s,^$action/*,,;
 852                 $input_params{'action'} = $action;
 853         }
 854
 855         # list of actions that want hash_base instead of hash, but can have no
 856         # pathname (f) parameter
 857         my @wants_base = (
 858                 'tree',
 859                 'history',
 860         );
 861
 862         # we want to catch, among others
 863         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864         my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867         # first, analyze the 'current' part
 868         if (defined $pathname) {
 869                 # we got "branch:filename" or "branch:dir/"
 870                 # we could use git_get_type(branch:pathname), but:
 871                 # - it needs $git_dir
 872                 # - it does a git() call
 873                 # - the convention of terminating directories with a slash
 874                 #   makes it superfluous
 875                 # - embedding the action in the PATH_INFO would make it even
 876                 #   more superfluous
 877                 $pathname =~ s,^/+,,;
 878                 if (!$pathname || substr($pathname, -1) eq "/") {
 879                         $input_params{'action'} ||= "tree";
 880                         $pathname =~ s,/$,,;
 881                 } else {
 882                         # the default action depends on whether we had parent info
 883                         # or not
 884                         if ($parentrefname) {
 885                                 $input_params{'action'} ||= "blobdiff_plain";
 886                         } else {
 887                                 $input_params{'action'} ||= "blob_plain";
 888                         }
 889                 }
 890                 $input_params{'hash_base'} ||= $refname;
 891                 $input_params{'file_name'} ||= $pathname;
 892         } elsif (defined $refname) {
 893                 # we got "branch". In this case we have to choose if we have to
 894                 # set hash or hash_base.
 895                 #
 896                 # Most of the actions without a pathname only want hash to be
 897                 # set, except for the ones specified in @wants_base that want
 898                 # hash_base instead. It should also be noted that hand-crafted
 899                 # links having 'history' as an action and no pathname or hash
 900                 # set will fail, but that happens regardless of PATH_INFO.
 901                 if (defined $parentrefname) {
 902                         # if there is parent let the default be 'shortlog' action
 903                         # (for http://git.example.com/repo.git/A..B links); if there
 904                         # is no parent, dispatch will detect type of object and set
 905                         # action appropriately if required (if action is not set)
 906                         $input_params{'action'} ||= "shortlog";
 907                 }
 908                 if ($input_params{'action'} &&
 909                     grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_base'} ||= $refname;
 911                 } else {
 912                         $input_params{'hash'} ||= $refname;
 913                 }
 914         }
 915
 916         # next, handle the 'parent' part, if present
 917         if (defined $parentrefname) {
 918                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                 # someproject/blobdiff/oldrev..newrev:/filename
 920                 if ($parentpathname) {
 921                         $parentpathname =~ s,^/+,,;
 922                         $parentpathname =~ s,/$,,;
 923                         $input_params{'file_parent'} ||= $parentpathname;
 924                 } else {
 925                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                 }
 927                 # we assume that hash_parent_base is wanted if a path was specified,
 928                 # or if the action wants hash_base instead of hash
 929                 if (defined $input_params{'file_parent'} ||
 930                         grep { $_ eq $input_params{'action'} } @wants_base) {
 931                         $input_params{'hash_parent_base'} ||= $parentrefname;
 932                 } else {
 933                         $input_params{'hash_parent'} ||= $parentrefname;
 934                 }
 935         }
 936
 937         # for the snapshot action, we allow URLs in the form
 938         # $project/snapshot/$hash.ext
 939         # where .ext determines the snapshot and gets removed from the
 940         # passed $refname to provide the $hash.
 941         #
 942         # To be able to tell that $refname includes the format extension, we
 943         # require the following two conditions to be satisfied:
 944         # - the hash input parameter MUST have been set from the $refname part
 945         #   of the URL (i.e. they must be equal)
 946         # - the snapshot format MUST NOT have been defined already (e.g. from
 947         #   CGI parameter sf)
 948         # It's also useless to try any matching unless $refname has a dot,
 949         # so we check for that too
 950         if (defined $input_params{'action'} &&
 951                 $input_params{'action'} eq 'snapshot' &&
 952                 defined $refname && index($refname, '.') != -1 &&
 953                 $refname eq $input_params{'hash'} &&
 954                 !defined $input_params{'snapshot_format'}) {
 955                 # We loop over the known snapshot formats, checking for
 956                 # extensions. Allowed extensions are both the defined suffix
 957                 # (which includes the initial dot already) and the snapshot
 958                 # format key itself, with a prepended dot
 959                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                         my $hash = $refname;
 961                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                 next;
 963                         }
 964                         my $sfx = $1;
 965                         # a valid suffix was found, so set the snapshot format
 966                         # and reset the hash parameter
 967                         $input_params{'snapshot_format'} = $fmt;
 968                         $input_params{'hash'} = $hash;
 969                         # we also set the format suffix to the one requested
 970                         # in the URL: this way a request for e.g. .tgz returns
 971                         # a .tgz instead of a .tar.gz
 972                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                         last;
 974                 }
 975         }
 976 }
 977
 978 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980      $searchtext, $search_regexp, $project_filter);
 981 sub evaluate_and_validate_params {
 982         our $action = $input_params{'action'};
 983         if (defined $action) {
 984                 if (!validate_action($action)) {
 985                         die_error(400, "Invalid action parameter");
 986                 }
 987         }
 988
 989         # parameters which are pathnames
 990         our $project = $input_params{'project'};
 991         if (defined $project) {
 992                 if (!validate_project($project)) {
 993                         undef $project;
 994                         die_error(404, "No such project");
 995                 }
 996         }
 997
 998         our $project_filter = $input_params{'project_filter'};
 999         if (defined $project_filter) {
1000                 if (!validate_pathname($project_filter)) {
1001                         die_error(404, "Invalid project_filter parameter");
1002                 }
1003         }
1004
1005         our $file_name = $input_params{'file_name'};
1006         if (defined $file_name) {
1007                 if (!validate_pathname($file_name)) {
1008                         die_error(400, "Invalid file parameter");
1009                 }
1010         }
1011
1012         our $file_parent = $input_params{'file_parent'};
1013         if (defined $file_parent) {
1014                 if (!validate_pathname($file_parent)) {
1015                         die_error(400, "Invalid file parent parameter");
1016                 }
1017         }
1018
1019         # parameters which are refnames
1020         our $hash = $input_params{'hash'};
1021         if (defined $hash) {
1022                 if (!validate_refname($hash)) {
1023                         die_error(400, "Invalid hash parameter");
1024                 }
1025         }
1026
1027         our $hash_parent = $input_params{'hash_parent'};
1028         if (defined $hash_parent) {
1029                 if (!validate_refname($hash_parent)) {
1030                         die_error(400, "Invalid hash parent parameter");
1031                 }
1032         }
1033
1034         our $hash_base = $input_params{'hash_base'};
1035         if (defined $hash_base) {
1036                 if (!validate_refname($hash_base)) {
1037                         die_error(400, "Invalid hash base parameter");
1038                 }
1039         }
1040
1041         our @extra_options = @{$input_params{'extra_options'}};
1042         # @extra_options is always defined, since it can only be (currently) set from
1043         # CGI, and $cgi->param() returns the empty array in array context if the param
1044         # is not set
1045         foreach my $opt (@extra_options) {
1046                 if (not exists $allowed_options{$opt}) {
1047                         die_error(400, "Invalid option parameter");
1048                 }
1049                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1050                         die_error(400, "Invalid option parameter for this action");
1051                 }
1052         }
1053
1054         our $hash_parent_base = $input_params{'hash_parent_base'};
1055         if (defined $hash_parent_base) {
1056                 if (!validate_refname($hash_parent_base)) {
1057                         die_error(400, "Invalid hash parent base parameter");
1058                 }
1059         }
1060
1061         # other parameters
1062         our $page = $input_params{'page'};
1063         if (defined $page) {
1064                 if ($page =~ m/[^0-9]/) {
1065                         die_error(400, "Invalid page parameter");
1066                 }
1067         }
1068
1069         our $searchtype = $input_params{'searchtype'};
1070         if (defined $searchtype) {
1071                 if ($searchtype =~ m/[^a-z]/) {
1072                         die_error(400, "Invalid searchtype parameter");
1073                 }
1074         }
1075
1076         our $search_use_regexp = $input_params{'search_use_regexp'};
1077
1078         our $searchtext = $input_params{'searchtext'};
1079         our $search_regexp;
1080         if (defined $searchtext) {
1081                 if (length($searchtext) < 2) {
1082                         die_error(403, "At least two characters are required for search parameter");
1083                 }
1084                 if ($search_use_regexp) {
1085                         $search_regexp = $searchtext;
1086                         if (!eval { qr/$search_regexp/; 1; }) {
1087                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1088                                 die_error(400, "Invalid search regexp '$search_regexp'",
1089                                           esc_html($error));
1090                         }
1091                 } else {
1092                         $search_regexp = quotemeta $searchtext;
1093                 }
1094         }
1095 }
1096
1097 # path to the current git repository
1098 our $git_dir;
1099 sub evaluate_git_dir {
1100         our $git_dir = "$projectroot/$project" if $project;
1101 }
1102
1103 our (@snapshot_fmts, $git_avatar);
1104 sub configure_gitweb_features {
1105         # list of supported snapshot formats
1106         our @snapshot_fmts = gitweb_get_feature('snapshot');
1107         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1108
1109         # check that the avatar feature is set to a known provider name,
1110         # and for each provider check if the dependencies are satisfied.
1111         # if the provider name is invalid or the dependencies are not met,
1112         # reset $git_avatar to the empty string.
1113         our ($git_avatar) = gitweb_get_feature('avatar');
1114         if ($git_avatar eq 'gravatar') {
1115                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1116         } elsif ($git_avatar eq 'picon') {
1117                 # no dependencies
1118         } else {
1119                 $git_avatar = '';
1120         }
1121 }
1122
1123 # custom error handler: 'die <message>' is Internal Server Error
1124 sub handle_errors_html {
1125         my $msg = shift; # it is already HTML escaped
1126
1127         # to avoid infinite loop where error occurs in die_error,
1128         # change handler to default handler, disabling handle_errors_html
1129         set_message("Error occured when inside die_error:\n$msg");
1130
1131         # you cannot jump out of die_error when called as error handler;
1132         # the subroutine set via CGI::Carp::set_message is called _after_
1133         # HTTP headers are already written, so it cannot write them itself
1134         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1135 }
1136 set_message(\&handle_errors_html);
1137
1138 # dispatch
1139 sub dispatch {
1140         if (!defined $action) {
1141                 if (defined $hash) {
1142                         $action = git_get_type($hash);
1143                         $action or die_error(404, "Object does not exist");
1144                 } elsif (defined $hash_base && defined $file_name) {
1145                         $action = git_get_type("$hash_base:$file_name");
1146                         $action or die_error(404, "File or directory does not exist");
1147                 } elsif (defined $project) {
1148                         $action = 'summary';
1149                 } else {
1150                         $action = 'project_list';
1151                 }
1152         }
1153         if (!defined($actions{$action})) {
1154                 die_error(400, "Unknown action");
1155         }
1156         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1157             !$project) {
1158                 die_error(400, "Project needed");
1159         }
1160         $actions{$action}->();
1161 }
1162
1163 sub reset_timer {
1164         our $t0 = [ gettimeofday() ]
1165                 if defined $t0;
1166         our $number_of_git_cmds = 0;
1167 }
1168
1169 our $first_request = 1;
1170 sub run_request {
1171         reset_timer();
1172
1173         evaluate_uri();
1174         if ($first_request) {
1175                 evaluate_gitweb_config();
1176                 evaluate_git_version();
1177         }
1178         if ($per_request_config) {
1179                 if (ref($per_request_config) eq 'CODE') {
1180                         $per_request_config->();
1181                 } elsif (!$first_request) {
1182                         evaluate_gitweb_config();
1183                 }
1184         }
1185         check_loadavg();
1186
1187         # $projectroot and $projects_list might be set in gitweb config file
1188         $projects_list ||= $projectroot;
1189
1190         evaluate_query_params();
1191         evaluate_path_info();
1192         evaluate_and_validate_params();
1193         evaluate_git_dir();
1194
1195         configure_gitweb_features();
1196
1197         dispatch();
1198 }
1199
1200 our $is_last_request = sub { 1 };
1201 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1202 our $CGI = 'CGI';
1203 our $cgi;
1204 sub configure_as_fcgi {
1205         require CGI::Fast;
1206         our $CGI = 'CGI::Fast';
1207
1208         my $request_number = 0;
1209         # let each child service 100 requests
1210         our $is_last_request = sub { ++$request_number > 100 };
1211 }
1212 sub evaluate_argv {
1213         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1214         configure_as_fcgi()
1215                 if $script_name =~ /\.fcgi$/;
1216
1217         return unless (@ARGV);
1218
1219         require Getopt::Long;
1220         Getopt::Long::GetOptions(
1221                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1222                 'nproc|n=i' => sub {
1223                         my ($arg, $val) = @_;
1224                         return unless eval { require FCGI::ProcManager; 1; };
1225                         my $proc_manager = FCGI::ProcManager->new({
1226                                 n_processes => $val,
1227                         });
1228                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1229                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1230                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1231                 },
1232         );
1233 }
1234
1235 sub run {
1236         evaluate_argv();
1237
1238         $first_request = 1;
1239         $pre_listen_hook->()
1240                 if $pre_listen_hook;
1241
1242  REQUEST:
1243         while ($cgi = $CGI->new()) {
1244                 $pre_dispatch_hook->()
1245                         if $pre_dispatch_hook;
1246
1247                 run_request();
1248
1249                 $post_dispatch_hook->()
1250                         if $post_dispatch_hook;
1251                 $first_request = 0;
1252
1253                 last REQUEST if ($is_last_request->());
1254         }
1255
1256  DONE_GITWEB:
1257         1;
1258 }
1259
1260 run();
1261
1262 if (defined caller) {
1263         # wrapped in a subroutine processing requests,
1264         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1265         return;
1266 } else {
1267         # pure CGI script, serving single request
1268         exit;
1269 }
1270
1271 ## ======================================================================
1272 ## action links
1273
1274 # possible values of extra options
1275 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1276 # -replay => 1      - start from a current view (replay with modifications)
1277 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1278 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1279 sub href {
1280         my %params = @_;
1281         # default is to use -absolute url() i.e. $my_uri
1282         my $href = $params{-full} ? $my_url : $my_uri;
1283
1284         # implicit -replay, must be first of implicit params
1285         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1286
1287         $params{'project'} = $project unless exists $params{'project'};
1288
1289         if ($params{-replay}) {
1290                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1291                         if (!exists $params{$name}) {
1292                                 $params{$name} = $input_params{$name};
1293                         }
1294                 }
1295         }
1296
1297         my $use_pathinfo = gitweb_check_feature('pathinfo');
1298         if (defined $params{'project'} &&
1299             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1300                 # try to put as many parameters as possible in PATH_INFO:
1301                 #   - project name
1302                 #   - action
1303                 #   - hash_parent or hash_parent_base:/file_parent
1304                 #   - hash or hash_base:/filename
1305                 #   - the snapshot_format as an appropriate suffix
1306
1307                 # When the script is the root DirectoryIndex for the domain,
1308                 # $href here would be something like http://gitweb.example.com/
1309                 # Thus, we strip any trailing / from $href, to spare us double
1310                 # slashes in the final URL
1311                 $href =~ s,/$,,;
1312
1313                 # Then add the project name, if present
1314                 $href .= "/".esc_path_info($params{'project'});
1315                 delete $params{'project'};
1316
1317                 # since we destructively absorb parameters, we keep this
1318                 # boolean that remembers if we're handling a snapshot
1319                 my $is_snapshot = $params{'action'} eq 'snapshot';
1320
1321                 # Summary just uses the project path URL, any other action is
1322                 # added to the URL
1323                 if (defined $params{'action'}) {
1324                         $href .= "/".esc_path_info($params{'action'})
1325                                 unless $params{'action'} eq 'summary';
1326                         delete $params{'action'};
1327                 }
1328
1329                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1330                 # stripping nonexistent or useless pieces
1331                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1332                         || $params{'hash_parent'} || $params{'hash'});
1333                 if (defined $params{'hash_base'}) {
1334                         if (defined $params{'hash_parent_base'}) {
1335                                 $href .= esc_path_info($params{'hash_parent_base'});
1336                                 # skip the file_parent if it's the same as the file_name
1337                                 if (defined $params{'file_parent'}) {
1338                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1339                                                 delete $params{'file_parent'};
1340                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1341                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1342                                                 delete $params{'file_parent'};
1343                                         }
1344                                 }
1345                                 $href .= "..";
1346                                 delete $params{'hash_parent'};
1347                                 delete $params{'hash_parent_base'};
1348                         } elsif (defined $params{'hash_parent'}) {
1349                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1350                                 delete $params{'hash_parent'};
1351                         }
1352
1353                         $href .= esc_path_info($params{'hash_base'});
1354                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1355                                 $href .= ":/".esc_path_info($params{'file_name'});
1356                                 delete $params{'file_name'};
1357                         }
1358                         delete $params{'hash'};
1359                         delete $params{'hash_base'};
1360                 } elsif (defined $params{'hash'}) {
1361                         $href .= esc_path_info($params{'hash'});
1362                         delete $params{'hash'};
1363                 }
1364
1365                 # If the action was a snapshot, we can absorb the
1366                 # snapshot_format parameter too
1367                 if ($is_snapshot) {
1368                         my $fmt = $params{'snapshot_format'};
1369                         # snapshot_format should always be defined when href()
1370                         # is called, but just in case some code forgets, we
1371                         # fall back to the default
1372                         $fmt ||= $snapshot_fmts[0];
1373                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1374                         delete $params{'snapshot_format'};
1375                 }
1376         }
1377
1378         # now encode the parameters explicitly
1379         my @result = ();
1380         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1381                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1382                 if (defined $params{$name}) {
1383                         if (ref($params{$name}) eq "ARRAY") {
1384                                 foreach my $par (@{$params{$name}}) {
1385                                         push @result, $symbol . "=" . esc_param($par);
1386                                 }
1387                         } else {
1388                                 push @result, $symbol . "=" . esc_param($params{$name});
1389                         }
1390                 }
1391         }
1392         $href .= "?" . join(';', @result) if scalar @result;
1393
1394         # final transformation: trailing spaces must be escaped (URI-encoded)
1395         $href =~ s/(\s+)$/CGI::escape($1)/e;
1396
1397         if ($params{-anchor}) {
1398                 $href .= "#".esc_param($params{-anchor});
1399         }
1400
1401         return $href;
1402 }
1403
1404
1405 ## ======================================================================
1406 ## validation, quoting/unquoting and escaping
1407
1408 sub validate_action {
1409         my $input = shift || return undef;
1410         return undef unless exists $actions{$input};
1411         return $input;
1412 }
1413
1414 sub validate_project {
1415         my $input = shift || return undef;
1416         if (!validate_pathname($input) ||
1417                 !(-d "$projectroot/$input") ||
1418                 !check_export_ok("$projectroot/$input") ||
1419                 ($strict_export && !project_in_list($input))) {
1420                 return undef;
1421         } else {
1422                 return $input;
1423         }
1424 }
1425
1426 sub validate_pathname {
1427         my $input = shift || return undef;
1428
1429         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1430         # at the beginning, at the end, and between slashes.
1431         # also this catches doubled slashes
1432         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1433                 return undef;
1434         }
1435         # no null characters
1436         if ($input =~ m!\0!) {
1437                 return undef;
1438         }
1439         return $input;
1440 }
1441
1442 sub validate_refname {
1443         my $input = shift || return undef;
1444
1445         # textual hashes are O.K.
1446         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1447                 return $input;
1448         }
1449         # it must be correct pathname
1450         $input = validate_pathname($input)
1451                 or return undef;
1452         # restrictions on ref name according to git-check-ref-format
1453         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1454                 return undef;
1455         }
1456         return $input;
1457 }
1458
1459 # decode sequences of octets in utf8 into Perl's internal form,
1460 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1461 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1462 sub to_utf8 {
1463         my $str = shift;
1464         return undef unless defined $str;
1465
1466         if (utf8::is_utf8($str) || utf8::decode($str)) {
1467                 return $str;
1468         } else {
1469                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1470         }
1471 }
1472
1473 # quote unsafe chars, but keep the slash, even when it's not
1474 # correct, but quoted slashes look too horrible in bookmarks
1475 sub esc_param {
1476         my $str = shift;
1477         return undef unless defined $str;
1478         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1479         $str =~ s/ /\+/g;
1480         return $str;
1481 }
1482
1483 # the quoting rules for path_info fragment are slightly different
1484 sub esc_path_info {
1485         my $str = shift;
1486         return undef unless defined $str;
1487
1488         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1489         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1490
1491         return $str;
1492 }
1493
1494 # quote unsafe chars in whole URL, so some characters cannot be quoted
1495 sub esc_url {
1496         my $str = shift;
1497         return undef unless defined $str;
1498         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1499         $str =~ s/ /\+/g;
1500         return $str;
1501 }
1502
1503 # quote unsafe characters in HTML attributes
1504 sub esc_attr {
1505
1506         # for XHTML conformance escaping '"' to '&quot;' is not enough
1507         return esc_html(@_);
1508 }
1509
1510 # replace invalid utf8 character with SUBSTITUTION sequence
1511 sub esc_html {
1512         my $str = shift;
1513         my %opts = @_;
1514
1515         return undef unless defined $str;
1516
1517         $str = to_utf8($str);
1518         $str = $cgi->escapeHTML($str);
1519         if ($opts{'-nbsp'}) {
1520                 $str =~ s/ /&nbsp;/g;
1521         }
1522         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1523         return $str;
1524 }
1525
1526 # quote control characters and escape filename to HTML
1527 sub esc_path {
1528         my $str = shift;
1529         my %opts = @_;
1530
1531         return undef unless defined $str;
1532
1533         $str = to_utf8($str);
1534         $str = $cgi->escapeHTML($str);
1535         if ($opts{'-nbsp'}) {
1536                 $str =~ s/ /&nbsp;/g;
1537         }
1538         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1539         return $str;
1540 }
1541
1542 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1543 sub sanitize {
1544         my $str = shift;
1545
1546         return undef unless defined $str;
1547
1548         $str = to_utf8($str);
1549         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1550         return $str;
1551 }
1552
1553 # Make control characters "printable", using character escape codes (CEC)
1554 sub quot_cec {
1555         my $cntrl = shift;
1556         my %opts = @_;
1557         my %es = ( # character escape codes, aka escape sequences
1558                 "\t" => '\t',   # tab            (HT)
1559                 "\n" => '\n',   # line feed      (LF)
1560                 "\r" => '\r',   # carrige return (CR)
1561                 "\f" => '\f',   # form feed      (FF)
1562                 "\b" => '\b',   # backspace      (BS)
1563                 "\a" => '\a',   # alarm (bell)   (BEL)
1564                 "\e" => '\e',   # escape         (ESC)
1565                 "\013" => '\v', # vertical tab   (VT)
1566                 "\000" => '\0', # nul character  (NUL)
1567         );
1568         my $chr = ( (exists $es{$cntrl})
1569                     ? $es{$cntrl}
1570                     : sprintf('\%2x', ord($cntrl)) );
1571         if ($opts{-nohtml}) {
1572                 return $chr;
1573         } else {
1574                 return "<span class=\"cntrl\">$chr</span>";
1575         }
1576 }
1577
1578 # Alternatively use unicode control pictures codepoints,
1579 # Unicode "printable representation" (PR)
1580 sub quot_upr {
1581         my $cntrl = shift;
1582         my %opts = @_;
1583
1584         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1585         if ($opts{-nohtml}) {
1586                 return $chr;
1587         } else {
1588                 return "<span class=\"cntrl\">$chr</span>";
1589         }
1590 }
1591
1592 # git may return quoted and escaped filenames
1593 sub unquote {
1594         my $str = shift;
1595
1596         sub unq {
1597                 my $seq = shift;
1598                 my %es = ( # character escape codes, aka escape sequences
1599                         't' => "\t",   # tab            (HT, TAB)
1600                         'n' => "\n",   # newline        (NL)
1601                         'r' => "\r",   # return         (CR)
1602                         'f' => "\f",   # form feed      (FF)
1603                         'b' => "\b",   # backspace      (BS)
1604                         'a' => "\a",   # alarm (bell)   (BEL)
1605                         'e' => "\e",   # escape         (ESC)
1606                         'v' => "\013", # vertical tab   (VT)
1607                 );
1608
1609                 if ($seq =~ m/^[0-7]{1,3}$/) {
1610                         # octal char sequence
1611                         return chr(oct($seq));
1612                 } elsif (exists $es{$seq}) {
1613                         # C escape sequence, aka character escape code
1614                         return $es{$seq};
1615                 }
1616                 # quoted ordinary character
1617                 return $seq;
1618         }
1619
1620         if ($str =~ m/^"(.*)"$/) {
1621                 # needs unquoting
1622                 $str = $1;
1623                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1624         }
1625         return $str;
1626 }
1627
1628 # escape tabs (convert tabs to spaces)
1629 sub untabify {
1630         my $line = shift;
1631
1632         while ((my $pos = index($line, "\t")) != -1) {
1633                 if (my $count = (8 - ($pos % 8))) {
1634                         my $spaces = ' ' x $count;
1635                         $line =~ s/\t/$spaces/;
1636                 }
1637         }
1638
1639         return $line;
1640 }
1641
1642 sub project_in_list {
1643         my $project = shift;
1644         my @list = git_get_projects_list();
1645         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1646 }
1647
1648 ## ----------------------------------------------------------------------
1649 ## HTML aware string manipulation
1650
1651 # Try to chop given string on a word boundary between position
1652 # $len and $len+$add_len. If there is no word boundary there,
1653 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1654 # (marking chopped part) would be longer than given string.
1655 sub chop_str {
1656         my $str = shift;
1657         my $len = shift;
1658         my $add_len = shift || 10;
1659         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1660
1661         # Make sure perl knows it is utf8 encoded so we don't
1662         # cut in the middle of a utf8 multibyte char.
1663         $str = to_utf8($str);
1664
1665         # allow only $len chars, but don't cut a word if it would fit in $add_len
1666         # if it doesn't fit, cut it if it's still longer than the dots we would add
1667         # remove chopped character entities entirely
1668
1669         # when chopping in the middle, distribute $len into left and right part
1670         # return early if chopping wouldn't make string shorter
1671         if ($where eq 'center') {
1672                 return $str if ($len + 5 >= length($str)); # filler is length 5
1673                 $len = int($len/2);
1674         } else {
1675                 return $str if ($len + 4 >= length($str)); # filler is length 4
1676         }
1677
1678         # regexps: ending and beginning with word part up to $add_len
1679         my $endre = qr/.{$len}\w{0,$add_len}/;
1680         my $begre = qr/\w{0,$add_len}.{$len}/;
1681
1682         if ($where eq 'left') {
1683                 $str =~ m/^(.*?)($begre)$/;
1684                 my ($lead, $body) = ($1, $2);
1685                 if (length($lead) > 4) {
1686                         $lead = " ...";
1687                 }
1688                 return "$lead$body";
1689
1690         } elsif ($where eq 'center') {
1691                 $str =~ m/^($endre)(.*)$/;
1692                 my ($left, $str)  = ($1, $2);
1693                 $str =~ m/^(.*?)($begre)$/;
1694                 my ($mid, $right) = ($1, $2);
1695                 if (length($mid) > 5) {
1696                         $mid = " ... ";
1697                 }
1698                 return "$left$mid$right";
1699
1700         } else {
1701                 $str =~ m/^($endre)(.*)$/;
1702                 my $body = $1;
1703                 my $tail = $2;
1704                 if (length($tail) > 4) {
1705                         $tail = "... ";
1706                 }
1707                 return "$body$tail";
1708         }
1709 }
1710
1711 # takes the same arguments as chop_str, but also wraps a <span> around the
1712 # result with a title attribute if it does get chopped. Additionally, the
1713 # string is HTML-escaped.
1714 sub chop_and_escape_str {
1715         my ($str) = @_;
1716
1717         my $chopped = chop_str(@_);
1718         $str = to_utf8($str);
1719         if ($chopped eq $str) {
1720                 return esc_html($chopped);
1721         } else {
1722                 $str =~ s/[[:cntrl:]]/?/g;
1723                 return $cgi->span({-title=>$str}, esc_html($chopped));
1724         }
1725 }
1726
1727 # Highlight selected fragments of string, using given CSS class,
1728 # and escape HTML.  It is assumed that fragments do not overlap.
1729 # Regions are passed as list of pairs (array references).
1730 #
1731 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1732 # '<span class="mark">foo</span>bar'
1733 sub esc_html_hl_regions {
1734         my ($str, $css_class, @sel) = @_;
1735         return esc_html($str) unless @sel;
1736
1737         my $out = '';
1738         my $pos = 0;
1739
1740         for my $s (@sel) {
1741                 $out .= esc_html(substr($str, $pos, $s->[0] - $pos))
1742                         if ($s->[0] - $pos > 0);
1743                 $out .= $cgi->span({-class => $css_class},
1744                                    esc_html(substr($str, $s->[0], $s->[1] - $s->[0])));
1745
1746                 $pos = $s->[1];
1747         }
1748         $out .= esc_html(substr($str, $pos))
1749                 if ($pos < length($str));
1750
1751         return $out;
1752 }
1753
1754 # return positions of beginning and end of each match
1755 sub matchpos_list {
1756         my ($str, $regexp) = @_;
1757         return unless (defined $str && defined $regexp);
1758
1759         my @matches;
1760         while ($str =~ /$regexp/g) {
1761                 push @matches, [$-[0], $+[0]];
1762         }
1763         return @matches;
1764 }
1765
1766 # highlight match (if any), and escape HTML
1767 sub esc_html_match_hl {
1768         my ($str, $regexp) = @_;
1769         return esc_html($str) unless defined $regexp;
1770
1771         my @matches = matchpos_list($str, $regexp);
1772         return esc_html($str) unless @matches;
1773
1774         return esc_html_hl_regions($str, 'match', @matches);
1775 }
1776
1777
1778 # highlight match (if any) of shortened string, and escape HTML
1779 sub esc_html_match_hl_chopped {
1780         my ($str, $chopped, $regexp) = @_;
1781         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1782
1783         my @matches = matchpos_list($str, $regexp);
1784         return esc_html($chopped) unless @matches;
1785
1786         # filter matches so that we mark chopped string
1787         my $tail = "... "; # see chop_str
1788         unless ($chopped =~ s/\Q$tail\E$//) {
1789                 $tail = '';
1790         }
1791         my $chop_len = length($chopped);
1792         my $tail_len = length($tail);
1793         my @filtered;
1794
1795         for my $m (@matches) {
1796                 if ($m->[0] > $chop_len) {
1797                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1798                         last;
1799                 } elsif ($m->[1] > $chop_len) {
1800                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1801                         last;
1802                 }
1803                 push @filtered, $m;
1804         }
1805
1806         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1807 }
1808
1809 ## ----------------------------------------------------------------------
1810 ## functions returning short strings
1811
1812 # CSS class for given age value (in seconds)
1813 sub age_class {
1814         my $age = shift;
1815
1816         if (!defined $age) {
1817                 return "noage";
1818         } elsif ($age < 60*60*2) {
1819                 return "age0";
1820         } elsif ($age < 60*60*24*2) {
1821                 return "age1";
1822         } else {
1823                 return "age2";
1824         }
1825 }
1826
1827 # convert age in seconds to "nn units ago" string
1828 sub age_string {
1829         my $age = shift;
1830         my $age_str;
1831
1832         if ($age > 60*60*24*365*2) {
1833                 $age_str = (int $age/60/60/24/365);
1834                 $age_str .= " years ago";
1835         } elsif ($age > 60*60*24*(365/12)*2) {
1836                 $age_str = int $age/60/60/24/(365/12);
1837                 $age_str .= " months ago";
1838         } elsif ($age > 60*60*24*7*2) {
1839                 $age_str = int $age/60/60/24/7;
1840                 $age_str .= " weeks ago";
1841         } elsif ($age > 60*60*24*2) {
1842                 $age_str = int $age/60/60/24;
1843                 $age_str .= " days ago";
1844         } elsif ($age > 60*60*2) {
1845                 $age_str = int $age/60/60;
1846                 $age_str .= " hours ago";
1847         } elsif ($age > 60*2) {
1848                 $age_str = int $age/60;
1849                 $age_str .= " min ago";
1850         } elsif ($age > 2) {
1851                 $age_str = int $age;
1852                 $age_str .= " sec ago";
1853         } else {
1854                 $age_str .= " right now";
1855         }
1856         return $age_str;
1857 }
1858
1859 use constant {
1860         S_IFINVALID => 0030000,
1861         S_IFGITLINK => 0160000,
1862 };
1863
1864 # submodule/subproject, a commit object reference
1865 sub S_ISGITLINK {
1866         my $mode = shift;
1867
1868         return (($mode & S_IFMT) == S_IFGITLINK)
1869 }
1870
1871 # convert file mode in octal to symbolic file mode string
1872 sub mode_str {
1873         my $mode = oct shift;
1874
1875         if (S_ISGITLINK($mode)) {
1876                 return 'm---------';
1877         } elsif (S_ISDIR($mode & S_IFMT)) {
1878                 return 'drwxr-xr-x';
1879         } elsif (S_ISLNK($mode)) {
1880                 return 'lrwxrwxrwx';
1881         } elsif (S_ISREG($mode)) {
1882                 # git cares only about the executable bit
1883                 if ($mode & S_IXUSR) {
1884                         return '-rwxr-xr-x';
1885                 } else {
1886                         return '-rw-r--r--';
1887                 };
1888         } else {
1889                 return '----------';
1890         }
1891 }
1892
1893 # convert file mode in octal to file type string
1894 sub file_type {
1895         my $mode = shift;
1896
1897         if ($mode !~ m/^[0-7]+$/) {
1898                 return $mode;
1899         } else {
1900                 $mode = oct $mode;
1901         }
1902
1903         if (S_ISGITLINK($mode)) {
1904                 return "submodule";
1905         } elsif (S_ISDIR($mode & S_IFMT)) {
1906                 return "directory";
1907         } elsif (S_ISLNK($mode)) {
1908                 return "symlink";
1909         } elsif (S_ISREG($mode)) {
1910                 return "file";
1911         } else {
1912                 return "unknown";
1913         }
1914 }
1915
1916 # convert file mode in octal to file type description string
1917 sub file_type_long {
1918         my $mode = shift;
1919
1920         if ($mode !~ m/^[0-7]+$/) {
1921                 return $mode;
1922         } else {
1923                 $mode = oct $mode;
1924         }
1925
1926         if (S_ISGITLINK($mode)) {
1927                 return "submodule";
1928         } elsif (S_ISDIR($mode & S_IFMT)) {
1929                 return "directory";
1930         } elsif (S_ISLNK($mode)) {
1931                 return "symlink";
1932         } elsif (S_ISREG($mode)) {
1933                 if ($mode & S_IXUSR) {
1934                         return "executable";
1935                 } else {
1936                         return "file";
1937                 };
1938         } else {
1939                 return "unknown";
1940         }
1941 }
1942
1943
1944 ## ----------------------------------------------------------------------
1945 ## functions returning short HTML fragments, or transforming HTML fragments
1946 ## which don't belong to other sections
1947
1948 # format line of commit message.
1949 sub format_log_line_html {
1950         my $line = shift;
1951
1952         $line = esc_html($line, -nbsp=>1);
1953         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1954                 $cgi->a({-href => href(action=>"object", hash=>$1),
1955                                         -class => "text"}, $1);
1956         }eg;
1957
1958         return $line;
1959 }
1960
1961 # format marker of refs pointing to given object
1962
1963 # the destination action is chosen based on object type and current context:
1964 # - for annotated tags, we choose the tag view unless it's the current view
1965 #   already, in which case we go to shortlog view
1966 # - for other refs, we keep the current view if we're in history, shortlog or
1967 #   log view, and select shortlog otherwise
1968 sub format_ref_marker {
1969         my ($refs, $id) = @_;
1970         my $markers = '';
1971
1972         if (defined $refs->{$id}) {
1973                 foreach my $ref (@{$refs->{$id}}) {
1974                         # this code exploits the fact that non-lightweight tags are the
1975                         # only indirect objects, and that they are the only objects for which
1976                         # we want to use tag instead of shortlog as action
1977                         my ($type, $name) = qw();
1978                         my $indirect = ($ref =~ s/\^\{\}$//);
1979                         # e.g. tags/v2.6.11 or heads/next
1980                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1981                                 $type = $1;
1982                                 $name = $2;
1983                         } else {
1984                                 $type = "ref";
1985                                 $name = $ref;
1986                         }
1987
1988                         my $class = $type;
1989                         $class .= " indirect" if $indirect;
1990
1991                         my $dest_action = "shortlog";
1992
1993                         if ($indirect) {
1994                                 $dest_action = "tag" unless $action eq "tag";
1995                         } elsif ($action =~ /^(history|(short)?log)$/) {
1996                                 $dest_action = $action;
1997                         }
1998
1999                         my $dest = "";
2000                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2001                         $dest .= $ref;
2002
2003                         my $link = $cgi->a({
2004                                 -href => href(
2005                                         action=>$dest_action,
2006                                         hash=>$dest
2007                                 )}, $name);
2008
2009                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2010                                 $link . "</span>";
2011                 }
2012         }
2013
2014         if ($markers) {
2015                 return ' <span class="refs">'. $markers . '</span>';
2016         } else {
2017                 return "";
2018         }
2019 }
2020
2021 # format, perhaps shortened and with markers, title line
2022 sub format_subject_html {
2023         my ($long, $short, $href, $extra) = @_;
2024         $extra = '' unless defined($extra);
2025
2026         if (length($short) < length($long)) {
2027                 $long =~ s/[[:cntrl:]]/?/g;
2028                 return $cgi->a({-href => $href, -class => "list subject",
2029                                 -title => to_utf8($long)},
2030                        esc_html($short)) . $extra;
2031         } else {
2032                 return $cgi->a({-href => $href, -class => "list subject"},
2033                        esc_html($long)) . $extra;
2034         }
2035 }
2036
2037 # Rather than recomputing the url for an email multiple times, we cache it
2038 # after the first hit. This gives a visible benefit in views where the avatar
2039 # for the same email is used repeatedly (e.g. shortlog).
2040 # The cache is shared by all avatar engines (currently gravatar only), which
2041 # are free to use it as preferred. Since only one avatar engine is used for any
2042 # given page, there's no risk for cache conflicts.
2043 our %avatar_cache = ();
2044
2045 # Compute the picon url for a given email, by using the picon search service over at
2046 # http://www.cs.indiana.edu/picons/search.html
2047 sub picon_url {
2048         my $email = lc shift;
2049         if (!$avatar_cache{$email}) {
2050                 my ($user, $domain) = split('@', $email);
2051                 $avatar_cache{$email} =
2052                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2053                         "$domain/$user/" .
2054                         "users+domains+unknown/up/single";
2055         }
2056         return $avatar_cache{$email};
2057 }
2058
2059 # Compute the gravatar url for a given email, if it's not in the cache already.
2060 # Gravatar stores only the part of the URL before the size, since that's the
2061 # one computationally more expensive. This also allows reuse of the cache for
2062 # different sizes (for this particular engine).
2063 sub gravatar_url {
2064         my $email = lc shift;
2065         my $size = shift;
2066         $avatar_cache{$email} ||=
2067                 "http://www.gravatar.com/avatar/" .
2068                         Digest::MD5::md5_hex($email) . "?s=";
2069         return $avatar_cache{$email} . $size;
2070 }
2071
2072 # Insert an avatar for the given $email at the given $size if the feature
2073 # is enabled.
2074 sub git_get_avatar {
2075         my ($email, %opts) = @_;
2076         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2077         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2078         $opts{-size} ||= 'default';
2079         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2080         my $url = "";
2081         if ($git_avatar eq 'gravatar') {
2082                 $url = gravatar_url($email, $size);
2083         } elsif ($git_avatar eq 'picon') {
2084                 $url = picon_url($email);
2085         }
2086         # Other providers can be added by extending the if chain, defining $url
2087         # as needed. If no variant puts something in $url, we assume avatars
2088         # are completely disabled/unavailable.
2089         if ($url) {
2090                 return $pre_white .
2091                        "<img width=\"$size\" " .
2092                             "class=\"avatar\" " .
2093                             "src=\"".esc_url($url)."\" " .
2094                             "alt=\"\" " .
2095                        "/>" . $post_white;
2096         } else {
2097                 return "";
2098         }
2099 }
2100
2101 sub format_search_author {
2102         my ($author, $searchtype, $displaytext) = @_;
2103         my $have_search = gitweb_check_feature('search');
2104
2105         if ($have_search) {
2106                 my $performed = "";
2107                 if ($searchtype eq 'author') {
2108                         $performed = "authored";
2109                 } elsif ($searchtype eq 'committer') {
2110                         $performed = "committed";
2111                 }
2112
2113                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2114                                 searchtext=>$author,
2115                                 searchtype=>$searchtype), class=>"list",
2116                                 title=>"Search for commits $performed by $author"},
2117                                 $displaytext);
2118
2119         } else {
2120                 return $displaytext;
2121         }
2122 }
2123
2124 # format the author name of the given commit with the given tag
2125 # the author name is chopped and escaped according to the other
2126 # optional parameters (see chop_str).
2127 sub format_author_html {
2128         my $tag = shift;
2129         my $co = shift;
2130         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2131         return "<$tag class=\"author\">" .
2132                format_search_author($co->{'author_name'}, "author",
2133                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2134                        $author) .
2135                "</$tag>";
2136 }
2137
2138 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2139 sub format_git_diff_header_line {
2140         my $line = shift;
2141         my $diffinfo = shift;
2142         my ($from, $to) = @_;
2143
2144         if ($diffinfo->{'nparents'}) {
2145                 # combined diff
2146                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2147                 if ($to->{'href'}) {
2148                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2149                                          esc_path($to->{'file'}));
2150                 } else { # file was deleted (no href)
2151                         $line .= esc_path($to->{'file'});
2152                 }
2153         } else {
2154                 # "ordinary" diff
2155                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2156                 if ($from->{'href'}) {
2157                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2158                                          'a/' . esc_path($from->{'file'}));
2159                 } else { # file was added (no href)
2160                         $line .= 'a/' . esc_path($from->{'file'});
2161                 }
2162                 $line .= ' ';
2163                 if ($to->{'href'}) {
2164                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2165                                          'b/' . esc_path($to->{'file'}));
2166                 } else { # file was deleted
2167                         $line .= 'b/' . esc_path($to->{'file'});
2168                 }
2169         }
2170
2171         return "<div class=\"diff header\">$line</div>\n";
2172 }
2173
2174 # format extended diff header line, before patch itself
2175 sub format_extended_diff_header_line {
2176         my $line = shift;
2177         my $diffinfo = shift;
2178         my ($from, $to) = @_;
2179
2180         # match <path>
2181         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2182                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2183                                        esc_path($from->{'file'}));
2184         }
2185         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2186                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2187                                  esc_path($to->{'file'}));
2188         }
2189         # match single <mode>
2190         if ($line =~ m/\s(\d{6})$/) {
2191                 $line .= '<span class="info"> (' .
2192                          file_type_long($1) .
2193                          ')</span>';
2194         }
2195         # match <hash>
2196         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2197                 # can match only for combined diff
2198                 $line = 'index ';
2199                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2200                         if ($from->{'href'}[$i]) {
2201                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2202                                                   -class=>"hash"},
2203                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2204                         } else {
2205                                 $line .= '0' x 7;
2206                         }
2207                         # separator
2208                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2209                 }
2210                 $line .= '..';
2211                 if ($to->{'href'}) {
2212                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2213                                          substr($diffinfo->{'to_id'},0,7));
2214                 } else {
2215                         $line .= '0' x 7;
2216                 }
2217
2218         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2219                 # can match only for ordinary diff
2220                 my ($from_link, $to_link);
2221                 if ($from->{'href'}) {
2222                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2223                                              substr($diffinfo->{'from_id'},0,7));
2224                 } else {
2225                         $from_link = '0' x 7;
2226                 }
2227                 if ($to->{'href'}) {
2228                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2229                                            substr($diffinfo->{'to_id'},0,7));
2230                 } else {
2231                         $to_link = '0' x 7;
2232                 }
2233                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2234                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2235         }
2236
2237         return $line . "<br/>\n";
2238 }
2239
2240 # format from-file/to-file diff header
2241 sub format_diff_from_to_header {
2242         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2243         my $line;
2244         my $result = '';
2245
2246         $line = $from_line;
2247         #assert($line =~ m/^---/) if DEBUG;
2248         # no extra formatting for "^--- /dev/null"
2249         if (! $diffinfo->{'nparents'}) {
2250                 # ordinary (single parent) diff
2251                 if ($line =~ m!^--- "?a/!) {
2252                         if ($from->{'href'}) {
2253                                 $line = '--- a/' .
2254                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2255                                                 esc_path($from->{'file'}));
2256                         } else {
2257                                 $line = '--- a/' .
2258                                         esc_path($from->{'file'});
2259                         }
2260                 }
2261                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2262
2263         } else {
2264                 # combined diff (merge commit)
2265                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2266                         if ($from->{'href'}[$i]) {
2267                                 $line = '--- ' .
2268                                         $cgi->a({-href=>href(action=>"blobdiff",
2269                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2270                                                              hash_parent_base=>$parents[$i],
2271                                                              file_parent=>$from->{'file'}[$i],
2272                                                              hash=>$diffinfo->{'to_id'},
2273                                                              hash_base=>$hash,
2274                                                              file_name=>$to->{'file'}),
2275                                                  -class=>"path",
2276                                                  -title=>"diff" . ($i+1)},
2277                                                 $i+1) .
2278                                         '/' .
2279                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2280                                                 esc_path($from->{'file'}[$i]));
2281                         } else {
2282                                 $line = '--- /dev/null';
2283                         }
2284                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2285                 }
2286         }
2287
2288         $line = $to_line;
2289         #assert($line =~ m/^\+\+\+/) if DEBUG;
2290         # no extra formatting for "^+++ /dev/null"
2291         if ($line =~ m!^\+\+\+ "?b/!) {
2292                 if ($to->{'href'}) {
2293                         $line = '+++ b/' .
2294                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2295                                         esc_path($to->{'file'}));
2296                 } else {
2297                         $line = '+++ b/' .
2298                                 esc_path($to->{'file'});
2299                 }
2300         }
2301         $result .= qq!<div class="diff to_file">$line</div>\n!;
2302
2303         return $result;
2304 }
2305
2306 # create note for patch simplified by combined diff
2307 sub format_diff_cc_simplified {
2308         my ($diffinfo, @parents) = @_;
2309         my $result = '';
2310
2311         $result .= "<div class=\"diff header\">" .
2312                    "diff --cc ";
2313         if (!is_deleted($diffinfo)) {
2314                 $result .= $cgi->a({-href => href(action=>"blob",
2315                                                   hash_base=>$hash,
2316                                                   hash=>$diffinfo->{'to_id'},
2317                                                   file_name=>$diffinfo->{'to_file'}),
2318                                     -class => "path"},
2319                                    esc_path($diffinfo->{'to_file'}));
2320         } else {
2321                 $result .= esc_path($diffinfo->{'to_file'});
2322         }
2323         $result .= "</div>\n" . # class="diff header"
2324                    "<div class=\"diff nodifferences\">" .
2325                    "Simple merge" .
2326                    "</div>\n"; # class="diff nodifferences"
2327
2328         return $result;
2329 }
2330
2331 sub diff_line_class {
2332         my ($line, $from, $to) = @_;
2333
2334         # ordinary diff
2335         my $num_sign = 1;
2336         # combined diff
2337         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2338                 $num_sign = scalar @{$from->{'href'}};
2339         }
2340
2341         my @diff_line_classifier = (
2342                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2343                 { regexp => qr/^\\/,               class => "incomplete"  },
2344                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2345                 # classifier for context must come before classifier add/rem,
2346                 # or we would have to use more complicated regexp, for example
2347                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2348                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2349                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2350         );
2351         for my $clsfy (@diff_line_classifier) {
2352                 return $clsfy->{'class'}
2353                         if ($line =~ $clsfy->{'regexp'});
2354         }
2355
2356         # fallback
2357         return "";
2358 }
2359
2360 # assumes that $from and $to are defined and correctly filled,
2361 # and that $line holds a line of chunk header for unified diff
2362 sub format_unidiff_chunk_header {
2363         my ($line, $from, $to) = @_;
2364
2365         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2366                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2367
2368         $from_lines = 0 unless defined $from_lines;
2369         $to_lines   = 0 unless defined $to_lines;
2370
2371         if ($from->{'href'}) {
2372                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2373                                      -class=>"list"}, $from_text);
2374         }
2375         if ($to->{'href'}) {
2376                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2377                                      -class=>"list"}, $to_text);
2378         }
2379         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2380                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2381         return $line;
2382 }
2383
2384 # assumes that $from and $to are defined and correctly filled,
2385 # and that $line holds a line of chunk header for combined diff
2386 sub format_cc_diff_chunk_header {
2387         my ($line, $from, $to) = @_;
2388
2389         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2390         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2391
2392         @from_text = split(' ', $ranges);
2393         for (my $i = 0; $i < @from_text; ++$i) {
2394                 ($from_start[$i], $from_nlines[$i]) =
2395                         (split(',', substr($from_text[$i], 1)), 0);
2396         }
2397
2398         $to_text   = pop @from_text;
2399         $to_start  = pop @from_start;
2400         $to_nlines = pop @from_nlines;
2401
2402         $line = "<span class=\"chunk_info\">$prefix ";
2403         for (my $i = 0; $i < @from_text; ++$i) {
2404                 if ($from->{'href'}[$i]) {
2405                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2406                                           -class=>"list"}, $from_text[$i]);
2407                 } else {
2408                         $line .= $from_text[$i];
2409                 }
2410                 $line .= " ";
2411         }
2412         if ($to->{'href'}) {
2413                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2414                                   -class=>"list"}, $to_text);
2415         } else {
2416                 $line .= $to_text;
2417         }
2418         $line .= " $prefix</span>" .
2419                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2420         return $line;
2421 }
2422
2423 # process patch (diff) line (not to be used for diff headers),
2424 # returning class and HTML-formatted (but not wrapped) line
2425 sub process_diff_line {
2426         my $line = shift;
2427         my ($from, $to) = @_;
2428
2429         my $diff_class = diff_line_class($line, $from, $to);
2430
2431         chomp $line;
2432         $line = untabify($line);
2433
2434         if ($from && $to && $line =~ m/^\@{2} /) {
2435                 $line = format_unidiff_chunk_header($line, $from, $to);
2436                 return $diff_class, $line;
2437
2438         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2439                 $line = format_cc_diff_chunk_header($line, $from, $to);
2440                 return $diff_class, $line;
2441
2442         }
2443         return $diff_class, esc_html($line, -nbsp=>1);
2444 }
2445
2446 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2447 # linked.  Pass the hash of the tree/commit to snapshot.
2448 sub format_snapshot_links {
2449         my ($hash) = @_;
2450         my $num_fmts = @snapshot_fmts;
2451         if ($num_fmts > 1) {
2452                 # A parenthesized list of links bearing format names.
2453                 # e.g. "snapshot (_tar.gz_ _zip_)"
2454                 return "snapshot (" . join(' ', map
2455                         $cgi->a({
2456                                 -href => href(
2457                                         action=>"snapshot",
2458                                         hash=>$hash,
2459                                         snapshot_format=>$_
2460                                 )
2461                         }, $known_snapshot_formats{$_}{'display'})
2462                 , @snapshot_fmts) . ")";
2463         } elsif ($num_fmts == 1) {
2464                 # A single "snapshot" link whose tooltip bears the format name.
2465                 # i.e. "_snapshot_"
2466                 my ($fmt) = @snapshot_fmts;
2467                 return
2468                         $cgi->a({
2469                                 -href => href(
2470                                         action=>"snapshot",
2471                                         hash=>$hash,
2472                                         snapshot_format=>$fmt
2473                                 ),
2474                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2475                         }, "snapshot");
2476         } else { # $num_fmts == 0
2477                 return undef;
2478         }
2479 }
2480
2481 ## ......................................................................
2482 ## functions returning values to be passed, perhaps after some
2483 ## transformation, to other functions; e.g. returning arguments to href()
2484
2485 # returns hash to be passed to href to generate gitweb URL
2486 # in -title key it returns description of link
2487 sub get_feed_info {
2488         my $format = shift || 'Atom';
2489         my %res = (action => lc($format));
2490
2491         # feed links are possible only for project views
2492         return unless (defined $project);
2493         # some views should link to OPML, or to generic project feed,
2494         # or don't have specific feed yet (so they should use generic)
2495         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2496
2497         my $branch;
2498         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2499         # from tag links; this also makes possible to detect branch links
2500         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2501             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2502                 $branch = $1;
2503         }
2504         # find log type for feed description (title)
2505         my $type = 'log';
2506         if (defined $file_name) {
2507                 $type  = "history of $file_name";
2508                 $type .= "/" if ($action eq 'tree');
2509                 $type .= " on '$branch'" if (defined $branch);
2510         } else {
2511                 $type = "log of $branch" if (defined $branch);
2512         }
2513
2514         $res{-title} = $type;
2515         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2516         $res{'file_name'} = $file_name;
2517
2518         return %res;
2519 }
2520
2521 ## ----------------------------------------------------------------------
2522 ## git utility subroutines, invoking git commands
2523
2524 # returns path to the core git executable and the --git-dir parameter as list
2525 sub git_cmd {
2526         $number_of_git_cmds++;
2527         return $GIT, '--git-dir='.$git_dir;
2528 }
2529
2530 # quote the given arguments for passing them to the shell
2531 # quote_command("command", "arg 1", "arg with ' and ! characters")
2532 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2533 # Try to avoid using this function wherever possible.
2534 sub quote_command {
2535         return join(' ',
2536                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2537 }
2538
2539 # get HEAD ref of given project as hash
2540 sub git_get_head_hash {
2541         return git_get_full_hash(shift, 'HEAD');
2542 }
2543
2544 sub git_get_full_hash {
2545         return git_get_hash(@_);
2546 }
2547
2548 sub git_get_short_hash {
2549         return git_get_hash(@_, '--short=7');
2550 }
2551
2552 sub git_get_hash {
2553         my ($project, $hash, @options) = @_;
2554         my $o_git_dir = $git_dir;
2555         my $retval = undef;
2556         $git_dir = "$projectroot/$project";
2557         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2558             '--verify', '-q', @options, $hash) {
2559                 $retval = <$fd>;
2560                 chomp $retval if defined $retval;
2561                 close $fd;
2562         }
2563         if (defined $o_git_dir) {
2564                 $git_dir = $o_git_dir;
2565         }
2566         return $retval;
2567 }
2568
2569 # get type of given object
2570 sub git_get_type {
2571         my $hash = shift;
2572
2573         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2574         my $type = <$fd>;
2575         close $fd or return;
2576         chomp $type;
2577         return $type;
2578 }
2579
2580 # repository configuration
2581 our $config_file = '';
2582 our %config;
2583
2584 # store multiple values for single key as anonymous array reference
2585 # single values stored directly in the hash, not as [ <value> ]
2586 sub hash_set_multi {
2587         my ($hash, $key, $value) = @_;
2588
2589         if (!exists $hash->{$key}) {
2590                 $hash->{$key} = $value;
2591         } elsif (!ref $hash->{$key}) {
2592                 $hash->{$key} = [ $hash->{$key}, $value ];
2593         } else {
2594                 push @{$hash->{$key}}, $value;
2595         }
2596 }
2597
2598 # return hash of git project configuration
2599 # optionally limited to some section, e.g. 'gitweb'
2600 sub git_parse_project_config {
2601         my $section_regexp = shift;
2602         my %config;
2603
2604         local $/ = "\0";
2605
2606         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2607                 or return;
2608
2609         while (my $keyval = <$fh>) {
2610                 chomp $keyval;
2611                 my ($key, $value) = split(/\n/, $keyval, 2);
2612
2613                 hash_set_multi(\%config, $key, $value)
2614                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2615         }
2616         close $fh;
2617
2618         return %config;
2619 }
2620
2621 # convert config value to boolean: 'true' or 'false'
2622 # no value, number > 0, 'true' and 'yes' values are true
2623 # rest of values are treated as false (never as error)
2624 sub config_to_bool {
2625         my $val = shift;
2626
2627         return 1 if !defined $val;             # section.key
2628
2629         # strip leading and trailing whitespace
2630         $val =~ s/^\s+//;
2631         $val =~ s/\s+$//;
2632
2633         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2634                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2635 }
2636
2637 # convert config value to simple decimal number
2638 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2639 # to be multiplied by 1024, 1048576, or 1073741824
2640 sub config_to_int {
2641         my $val = shift;
2642
2643         # strip leading and trailing whitespace
2644         $val =~ s/^\s+//;
2645         $val =~ s/\s+$//;
2646
2647         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2648                 $unit = lc($unit);
2649                 # unknown unit is treated as 1
2650                 return $num * ($unit eq 'g' ? 1073741824 :
2651                                $unit eq 'm' ?    1048576 :
2652                                $unit eq 'k' ?       1024 : 1);
2653         }
2654         return $val;
2655 }
2656
2657 # convert config value to array reference, if needed
2658 sub config_to_multi {
2659         my $val = shift;
2660
2661         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2662 }
2663
2664 sub git_get_project_config {
2665         my ($key, $type) = @_;
2666
2667         return unless defined $git_dir;
2668
2669         # key sanity check
2670         return unless ($key);
2671         # only subsection, if exists, is case sensitive,
2672         # and not lowercased by 'git config -z -l'
2673         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2674                 $key = join(".", lc($hi), $mi, lc($lo));
2675         } else {
2676                 $key = lc($key);
2677         }
2678         $key =~ s/^gitweb\.//;
2679         return if ($key =~ m/\W/);
2680
2681         # type sanity check
2682         if (defined $type) {
2683                 $type =~ s/^--//;
2684                 $type = undef
2685                         unless ($type eq 'bool' || $type eq 'int');
2686         }
2687
2688         # get config
2689         if (!defined $config_file ||
2690             $config_file ne "$git_dir/config") {
2691                 %config = git_parse_project_config('gitweb');
2692                 $config_file = "$git_dir/config";
2693         }
2694
2695         # check if config variable (key) exists
2696         return unless exists $config{"gitweb.$key"};
2697
2698         # ensure given type
2699         if (!defined $type) {
2700                 return $config{"gitweb.$key"};
2701         } elsif ($type eq 'bool') {
2702                 # backward compatibility: 'git config --bool' returns true/false
2703                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2704         } elsif ($type eq 'int') {
2705                 return config_to_int($config{"gitweb.$key"});
2706         }
2707         return $config{"gitweb.$key"};
2708 }
2709
2710 # get hash of given path at given ref
2711 sub git_get_hash_by_path {
2712         my $base = shift;
2713         my $path = shift || return undef;
2714         my $type = shift;
2715
2716         $path =~ s,/+$,,;
2717
2718         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2719                 or die_error(500, "Open git-ls-tree failed");
2720         my $line = <$fd>;
2721         close $fd or return undef;
2722
2723         if (!defined $line) {
2724                 # there is no tree or hash given by $path at $base
2725                 return undef;
2726         }
2727
2728         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2729         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2730         if (defined $type && $type ne $2) {
2731                 # type doesn't match
2732                 return undef;
2733         }
2734         return $3;
2735 }
2736
2737 # get path of entry with given hash at given tree-ish (ref)
2738 # used to get 'from' filename for combined diff (merge commit) for renames
2739 sub git_get_path_by_hash {
2740         my $base = shift || return;
2741         my $hash = shift || return;
2742
2743         local $/ = "\0";
2744
2745         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2746                 or return undef;
2747         while (my $line = <$fd>) {
2748                 chomp $line;
2749
2750                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2751                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2752                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2753                         close $fd;
2754                         return $1;
2755                 }
2756         }
2757         close $fd;
2758         return undef;
2759 }
2760
2761 ## ......................................................................
2762 ## git utility functions, directly accessing git repository
2763
2764 # get the value of config variable either from file named as the variable
2765 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2766 # configuration variable in the repository config file.
2767 sub git_get_file_or_project_config {
2768         my ($path, $name) = @_;
2769
2770         $git_dir = "$projectroot/$path";
2771         open my $fd, '<', "$git_dir/$name"
2772                 or return git_get_project_config($name);
2773         my $conf = <$fd>;
2774         close $fd;
2775         if (defined $conf) {
2776                 chomp $conf;
2777         }
2778         return $conf;
2779 }
2780
2781 sub git_get_project_description {
2782         my $path = shift;
2783         return git_get_file_or_project_config($path, 'description');
2784 }
2785
2786 sub git_get_project_category {
2787         my $path = shift;
2788         return git_get_file_or_project_config($path, 'category');
2789 }
2790
2791
2792 # supported formats:
2793 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2794 #   - if its contents is a number, use it as tag weight,
2795 #   - otherwise add a tag with weight 1
2796 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2797 #   the same value multiple times increases tag weight
2798 # * `gitweb.ctag' multi-valued repo config variable
2799 sub git_get_project_ctags {
2800         my $project = shift;
2801         my $ctags = {};
2802
2803         $git_dir = "$projectroot/$project";
2804         if (opendir my $dh, "$git_dir/ctags") {
2805                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2806                 foreach my $tagfile (@files) {
2807                         open my $ct, '<', $tagfile
2808                                 or next;
2809                         my $val = <$ct>;
2810                         chomp $val if $val;
2811                         close $ct;
2812
2813                         (my $ctag = $tagfile) =~ s#.*/##;
2814                         if ($val =~ /^\d+$/) {
2815                                 $ctags->{$ctag} = $val;
2816                         } else {
2817                                 $ctags->{$ctag} = 1;
2818                         }
2819                 }
2820                 closedir $dh;
2821
2822         } elsif (open my $fh, '<', "$git_dir/ctags") {
2823                 while (my $line = <$fh>) {
2824                         chomp $line;
2825                         $ctags->{$line}++ if $line;
2826                 }
2827                 close $fh;
2828
2829         } else {
2830                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2831                 foreach my $tag (@$taglist) {
2832                         $ctags->{$tag}++;
2833                 }
2834         }
2835
2836         return $ctags;
2837 }
2838
2839 # return hash, where keys are content tags ('ctags'),
2840 # and values are sum of weights of given tag in every project
2841 sub git_gather_all_ctags {
2842         my $projects = shift;
2843         my $ctags = {};
2844
2845         foreach my $p (@$projects) {
2846                 foreach my $ct (keys %{$p->{'ctags'}}) {
2847                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2848                 }
2849         }
2850
2851         return $ctags;
2852 }
2853
2854 sub git_populate_project_tagcloud {
2855         my $ctags = shift;
2856
2857         # First, merge different-cased tags; tags vote on casing
2858         my %ctags_lc;
2859         foreach (keys %$ctags) {
2860                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2861                 if (not $ctags_lc{lc $_}->{topcount}
2862                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2863                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2864                         $ctags_lc{lc $_}->{topname} = $_;
2865                 }
2866         }
2867
2868         my $cloud;
2869         my $matched = $input_params{'ctag'};
2870         if (eval { require HTML::TagCloud; 1; }) {
2871                 $cloud = HTML::TagCloud->new;
2872                 foreach my $ctag (sort keys %ctags_lc) {
2873                         # Pad the title with spaces so that the cloud looks
2874                         # less crammed.
2875                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2876                         $title =~ s/ /&nbsp;/g;
2877                         $title =~ s/^/&nbsp;/g;
2878                         $title =~ s/$/&nbsp;/g;
2879                         if (defined $matched && $matched eq $ctag) {
2880                                 $title = qq(<span class="match">$title</span>);
2881                         }
2882                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2883                                     $ctags_lc{$ctag}->{count});
2884                 }
2885         } else {
2886                 $cloud = {};
2887                 foreach my $ctag (keys %ctags_lc) {
2888                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2889                         if (defined $matched && $matched eq $ctag) {
2890                                 $title = qq(<span class="match">$title</span>);
2891                         }
2892                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2893                         $cloud->{$ctag}{ctag} =
2894                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2895                 }
2896         }
2897         return $cloud;
2898 }
2899
2900 sub git_show_project_tagcloud {
2901         my ($cloud, $count) = @_;
2902         if (ref $cloud eq 'HTML::TagCloud') {
2903                 return $cloud->html_and_css($count);
2904         } else {
2905                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2906                 return
2907                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2908                         join (', ', map {
2909                                 $cloud->{$_}->{'ctag'}
2910                         } splice(@tags, 0, $count)) .
2911                         '</div>';
2912         }
2913 }
2914
2915 sub git_get_project_url_list {
2916         my $path = shift;
2917
2918         $git_dir = "$projectroot/$path";
2919         open my $fd, '<', "$git_dir/cloneurl"
2920                 or return wantarray ?
2921                 @{ config_to_multi(git_get_project_config('url')) } :
2922                    config_to_multi(git_get_project_config('url'));
2923         my @git_project_url_list = map { chomp; $_ } <$fd>;
2924         close $fd;
2925
2926         return wantarray ? @git_project_url_list : \@git_project_url_list;
2927 }
2928
2929 sub git_get_projects_list {
2930         my $filter = shift || '';
2931         my $paranoid = shift;
2932         my @list;
2933
2934         if (-d $projects_list) {
2935                 # search in directory
2936                 my $dir = $projects_list;
2937                 # remove the trailing "/"
2938                 $dir =~ s!/+$!!;
2939                 my $pfxlen = length("$dir");
2940                 my $pfxdepth = ($dir =~ tr!/!!);
2941                 # when filtering, search only given subdirectory
2942                 if ($filter && !$paranoid) {
2943                         $dir .= "/$filter";
2944                         $dir =~ s!/+$!!;
2945                 }
2946
2947                 File::Find::find({
2948                         follow_fast => 1, # follow symbolic links
2949                         follow_skip => 2, # ignore duplicates
2950                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2951                         wanted => sub {
2952                                 # global variables
2953                                 our $project_maxdepth;
2954                                 our $projectroot;
2955                                 # skip project-list toplevel, if we get it.
2956                                 return if (m!^[/.]$!);
2957                                 # only directories can be git repositories
2958                                 return unless (-d $_);
2959                                 # don't traverse too deep (Find is super slow on os x)
2960                                 # $project_maxdepth excludes depth of $projectroot
2961                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2962                                         $File::Find::prune = 1;
2963                                         return;
2964                                 }
2965
2966                                 my $path = substr($File::Find::name, $pfxlen + 1);
2967                                 # paranoidly only filter here
2968                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2969                                         next;
2970                                 }
2971                                 # we check related file in $projectroot
2972                                 if (check_export_ok("$projectroot/$path")) {
2973                                         push @list, { path => $path };
2974                                         $File::Find::prune = 1;
2975                                 }
2976                         },
2977                 }, "$dir");
2978
2979         } elsif (-f $projects_list) {
2980                 # read from file(url-encoded):
2981                 # 'git%2Fgit.git Linus+Torvalds'
2982                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2983                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2984                 open my $fd, '<', $projects_list or return;
2985         PROJECT:
2986                 while (my $line = <$fd>) {
2987                         chomp $line;
2988                         my ($path, $owner) = split ' ', $line;
2989                         $path = unescape($path);
2990                         $owner = unescape($owner);
2991                         if (!defined $path) {
2992                                 next;
2993                         }
2994                         # if $filter is rpovided, check if $path begins with $filter
2995                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2996                                 next;
2997                         }
2998                         if (check_export_ok("$projectroot/$path")) {
2999                                 my $pr = {
3000                                         path => $path,
3001                                         owner => to_utf8($owner),
3002                                 };
3003                                 push @list, $pr;
3004                         }
3005                 }
3006                 close $fd;
3007         }
3008         return @list;
3009 }
3010
3011 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3012 # as side effects it sets 'forks' field to list of forks for forked projects
3013 sub filter_forks_from_projects_list {
3014         my $projects = shift;
3015
3016         my %trie; # prefix tree of directories (path components)
3017         # generate trie out of those directories that might contain forks
3018         foreach my $pr (@$projects) {
3019                 my $path = $pr->{'path'};
3020                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3021                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3022                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3023                 next unless (-d "$projectroot/$path"); # containing directory exists
3024                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3025
3026                 # add to trie
3027                 my @dirs = split('/', $path);
3028                 # walk the trie, until either runs out of components or out of trie
3029                 my $ref = \%trie;
3030                 while (scalar @dirs &&
3031                        exists($ref->{$dirs[0]})) {
3032                         $ref = $ref->{shift @dirs};
3033                 }
3034                 # create rest of trie structure from rest of components
3035                 foreach my $dir (@dirs) {
3036                         $ref = $ref->{$dir} = {};
3037                 }
3038                 # create end marker, store $pr as a data
3039                 $ref->{''} = $pr if (!exists $ref->{''});
3040         }
3041
3042         # filter out forks, by finding shortest prefix match for paths
3043         my @filtered;
3044  PROJECT:
3045         foreach my $pr (@$projects) {
3046                 # trie lookup
3047                 my $ref = \%trie;
3048         DIR:
3049                 foreach my $dir (split('/', $pr->{'path'})) {
3050                         if (exists $ref->{''}) {
3051                                 # found [shortest] prefix, is a fork - skip it
3052                                 push @{$ref->{''}{'forks'}}, $pr;
3053                                 next PROJECT;
3054                         }
3055                         if (!exists $ref->{$dir}) {
3056                                 # not in trie, cannot have prefix, not a fork
3057                                 push @filtered, $pr;
3058                                 next PROJECT;
3059                         }
3060                         # If the dir is there, we just walk one step down the trie.
3061                         $ref = $ref->{$dir};
3062                 }
3063                 # we ran out of trie
3064                 # (shouldn't happen: it's either no match, or end marker)
3065                 push @filtered, $pr;
3066         }
3067
3068         return @filtered;
3069 }
3070
3071 # note: fill_project_list_info must be run first,
3072 # for 'descr_long' and 'ctags' to be filled
3073 sub search_projects_list {
3074         my ($projlist, %opts) = @_;
3075         my $tagfilter  = $opts{'tagfilter'};
3076         my $search_re = $opts{'search_regexp'};
3077
3078         return @$projlist
3079                 unless ($tagfilter || $search_re);
3080
3081         # searching projects require filling to be run before it;
3082         fill_project_list_info($projlist,
3083                                $tagfilter  ? 'ctags' : (),
3084                                $search_re ? ('path', 'descr') : ());
3085         my @projects;
3086  PROJECT:
3087         foreach my $pr (@$projlist) {
3088
3089                 if ($tagfilter) {
3090                         next unless ref($pr->{'ctags'}) eq 'HASH';
3091                         next unless
3092                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3093                 }
3094
3095                 if ($search_re) {
3096                         next unless
3097                                 $pr->{'path'} =~ /$search_re/ ||
3098                                 $pr->{'descr_long'} =~ /$search_re/;
3099                 }
3100
3101                 push @projects, $pr;
3102         }
3103
3104         return @projects;
3105 }
3106
3107 our $gitweb_project_owner = undef;
3108 sub git_get_project_list_from_file {
3109
3110         return if (defined $gitweb_project_owner);
3111
3112         $gitweb_project_owner = {};
3113         # read from file (url-encoded):
3114         # 'git%2Fgit.git Linus+Torvalds'
3115         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3116         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3117         if (-f $projects_list) {
3118                 open(my $fd, '<', $projects_list);
3119                 while (my $line = <$fd>) {
3120                         chomp $line;
3121                         my ($pr, $ow) = split ' ', $line;
3122                         $pr = unescape($pr);
3123                         $ow = unescape($ow);
3124                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3125                 }
3126                 close $fd;
3127         }
3128 }
3129
3130 sub git_get_project_owner {
3131         my $project = shift;
3132         my $owner;
3133
3134         return undef unless $project;
3135         $git_dir = "$projectroot/$project";
3136
3137         if (!defined $gitweb_project_owner) {
3138                 git_get_project_list_from_file();
3139         }
3140
3141         if (exists $gitweb_project_owner->{$project}) {
3142                 $owner = $gitweb_project_owner->{$project};
3143         }
3144         if (!defined $owner){
3145                 $owner = git_get_project_config('owner');
3146         }
3147         if (!defined $owner) {
3148                 $owner = get_file_owner("$git_dir");
3149         }
3150
3151         return $owner;
3152 }
3153
3154 sub git_get_last_activity {
3155         my ($path) = @_;
3156         my $fd;
3157
3158         $git_dir = "$projectroot/$path";
3159         open($fd, "-|", git_cmd(), 'for-each-ref',
3160              '--format=%(committer)',
3161              '--sort=-committerdate',
3162              '--count=1',
3163              'refs/heads') or return;
3164         my $most_recent = <$fd>;
3165         close $fd or return;
3166         if (defined $most_recent &&
3167             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3168                 my $timestamp = $1;
3169                 my $age = time - $timestamp;
3170                 return ($age, age_string($age));
3171         }
3172         return (undef, undef);
3173 }
3174
3175 # Implementation note: when a single remote is wanted, we cannot use 'git
3176 # remote show -n' because that command always work (assuming it's a remote URL
3177 # if it's not defined), and we cannot use 'git remote show' because that would
3178 # try to make a network roundtrip. So the only way to find if that particular
3179 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3180 # and when we find what we want.
3181 sub git_get_remotes_list {
3182         my $wanted = shift;
3183         my %remotes = ();
3184
3185         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3186         return unless $fd;
3187         while (my $remote = <$fd>) {
3188                 chomp $remote;
3189                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3190                 next if $wanted and not $remote eq $wanted;
3191                 my ($url, $key) = ($1, $2);
3192
3193                 $remotes{$remote} ||= { 'heads' => () };
3194                 $remotes{$remote}{$key} = $url;
3195         }
3196         close $fd or return;
3197         return wantarray ? %remotes : \%remotes;
3198 }
3199
3200 # Takes a hash of remotes as first parameter and fills it by adding the
3201 # available remote heads for each of the indicated remotes.
3202 sub fill_remote_heads {
3203         my $remotes = shift;
3204         my @heads = map { "remotes/$_" } keys %$remotes;
3205         my @remoteheads = git_get_heads_list(undef, @heads);
3206         foreach my $remote (keys %$remotes) {
3207                 $remotes->{$remote}{'heads'} = [ grep {
3208                         $_->{'name'} =~ s!^$remote/!!
3209                         } @remoteheads ];
3210         }
3211 }
3212
3213 sub git_get_references {
3214         my $type = shift || "";
3215         my %refs;
3216         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3217         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3218         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3219                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3220                 or return;
3221
3222         while (my $line = <$fd>) {
3223                 chomp $line;
3224                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3225                         if (defined $refs{$1}) {
3226                                 push @{$refs{$1}}, $2;
3227                         } else {
3228                                 $refs{$1} = [ $2 ];
3229                         }
3230                 }
3231         }
3232         close $fd or return;
3233         return \%refs;
3234 }
3235
3236 sub git_get_rev_name_tags {
3237         my $hash = shift || return undef;
3238
3239         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3240                 or return;
3241         my $name_rev = <$fd>;
3242         close $fd;
3243
3244         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3245                 return $1;
3246         } else {
3247                 # catches also '$hash undefined' output
3248                 return undef;
3249         }
3250 }
3251
3252 ## ----------------------------------------------------------------------
3253 ## parse to hash functions
3254
3255 sub parse_date {
3256         my $epoch = shift;
3257         my $tz = shift || "-0000";
3258
3259         my %date;
3260         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3261         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3262         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3263         $date{'hour'} = $hour;
3264         $date{'minute'} = $min;
3265         $date{'mday'} = $mday;
3266         $date{'day'} = $days[$wday];
3267         $date{'month'} = $months[$mon];
3268         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3269                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3270         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3271                              $mday, $months[$mon], $hour ,$min;
3272         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3273                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3274
3275         my ($tz_sign, $tz_hour, $tz_min) =
3276                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3277         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3278         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3279         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3280         $date{'hour_local'} = $hour;
3281         $date{'minute_local'} = $min;
3282         $date{'tz_local'} = $tz;
3283         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3284                                   1900+$year, $mon+1, $mday,
3285                                   $hour, $min, $sec, $tz);
3286         return %date;
3287 }
3288
3289 sub parse_tag {
3290         my $tag_id = shift;
3291         my %tag;
3292         my @comment;
3293
3294         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3295         $tag{'id'} = $tag_id;
3296         while (my $line = <$fd>) {
3297                 chomp $line;
3298                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3299                         $tag{'object'} = $1;
3300                 } elsif ($line =~ m/^type (.+)$/) {
3301                         $tag{'type'} = $1;
3302                 } elsif ($line =~ m/^tag (.+)$/) {
3303                         $tag{'name'} = $1;
3304                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3305                         $tag{'author'} = $1;
3306                         $tag{'author_epoch'} = $2;
3307                         $tag{'author_tz'} = $3;
3308                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3309                                 $tag{'author_name'}  = $1;
3310                                 $tag{'author_email'} = $2;
3311                         } else {
3312                                 $tag{'author_name'} = $tag{'author'};
3313                         }
3314                 } elsif ($line =~ m/--BEGIN/) {
3315                         push @comment, $line;
3316                         last;
3317                 } elsif ($line eq "") {
3318                         last;
3319                 }
3320         }
3321         push @comment, <$fd>;
3322         $tag{'comment'} = \@comment;
3323         close $fd or return;
3324         if (!defined $tag{'name'}) {
3325                 return
3326         };
3327         return %tag
3328 }
3329
3330 sub parse_commit_text {
3331         my ($commit_text, $withparents) = @_;
3332         my @commit_lines = split '\n', $commit_text;
3333         my %co;
3334
3335         pop @commit_lines; # Remove '\0'
3336
3337         if (! @commit_lines) {
3338                 return;
3339         }
3340
3341         my $header = shift @commit_lines;
3342         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3343                 return;
3344         }
3345         ($co{'id'}, my @parents) = split ' ', $header;
3346         while (my $line = shift @commit_lines) {
3347                 last if $line eq "\n";
3348                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3349                         $co{'tree'} = $1;
3350                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3351                         push @parents, $1;
3352                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3353                         $co{'author'} = to_utf8($1);
3354                         $co{'author_epoch'} = $2;
3355                         $co{'author_tz'} = $3;
3356                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3357                                 $co{'author_name'}  = $1;
3358                                 $co{'author_email'} = $2;
3359                         } else {
3360                                 $co{'author_name'} = $co{'author'};
3361                         }
3362                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3363                         $co{'committer'} = to_utf8($1);
3364                         $co{'committer_epoch'} = $2;
3365                         $co{'committer_tz'} = $3;
3366                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3367                                 $co{'committer_name'}  = $1;
3368                                 $co{'committer_email'} = $2;
3369                         } else {
3370                                 $co{'committer_name'} = $co{'committer'};
3371                         }
3372                 }
3373         }
3374         if (!defined $co{'tree'}) {
3375                 return;
3376         };
3377         $co{'parents'} = \@parents;
3378         $co{'parent'} = $parents[0];
3379
3380         foreach my $title (@commit_lines) {
3381                 $title =~ s/^    //;
3382                 if ($title ne "") {
3383                         $co{'title'} = chop_str($title, 80, 5);
3384                         # remove leading stuff of merges to make the interesting part visible
3385                         if (length($title) > 50) {
3386                                 $title =~ s/^Automatic //;
3387                                 $title =~ s/^merge (of|with) /Merge ... /i;
3388                                 if (length($title) > 50) {
3389                                         $title =~ s/(http|rsync):\/\///;
3390                                 }
3391                                 if (length($title) > 50) {
3392                                         $title =~ s/(master|www|rsync)\.//;
3393                                 }
3394                                 if (length($title) > 50) {
3395                                         $title =~ s/kernel.org:?//;
3396                                 }
3397                                 if (length($title) > 50) {
3398                                         $title =~ s/\/pub\/scm//;
3399                                 }
3400                         }
3401                         $co{'title_short'} = chop_str($title, 50, 5);
3402                         last;
3403                 }
3404         }
3405         if (! defined $co{'title'} || $co{'title'} eq "") {
3406                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3407         }
3408         # remove added spaces
3409         foreach my $line (@commit_lines) {
3410                 $line =~ s/^    //;
3411         }
3412         $co{'comment'} = \@commit_lines;
3413
3414         my $age = time - $co{'committer_epoch'};
3415         $co{'age'} = $age;
3416         $co{'age_string'} = age_string($age);
3417         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3418         if ($age > 60*60*24*7*2) {
3419                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3420                 $co{'age_string_age'} = $co{'age_string'};
3421         } else {
3422                 $co{'age_string_date'} = $co{'age_string'};
3423                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3424         }
3425         return %co;
3426 }
3427
3428 sub parse_commit {
3429         my ($commit_id) = @_;
3430         my %co;
3431
3432         local $/ = "\0";
3433
3434         open my $fd, "-|", git_cmd(), "rev-list",
3435                 "--parents",
3436                 "--header",
3437                 "--max-count=1",
3438                 $commit_id,
3439                 "--",
3440                 or die_error(500, "Open git-rev-list failed");
3441         %co = parse_commit_text(<$fd>, 1);
3442         close $fd;
3443
3444         return %co;
3445 }
3446
3447 sub parse_commits {
3448         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3449         my @cos;
3450
3451         $maxcount ||= 1;
3452         $skip ||= 0;
3453
3454         local $/ = "\0";
3455
3456         open my $fd, "-|", git_cmd(), "rev-list",
3457                 "--header",
3458                 @args,
3459                 ("--max-count=" . $maxcount),
3460                 ("--skip=" . $skip),
3461                 @extra_options,
3462                 $commit_id,
3463                 "--",
3464                 ($filename ? ($filename) : ())
3465                 or die_error(500, "Open git-rev-list failed");
3466         while (my $line = <$fd>) {
3467                 my %co = parse_commit_text($line);
3468                 push @cos, \%co;
3469         }
3470         close $fd;
3471
3472         return wantarray ? @cos : \@cos;
3473 }
3474
3475 # parse line of git-diff-tree "raw" output
3476 sub parse_difftree_raw_line {
3477         my $line = shift;
3478         my %res;
3479
3480         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3481         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3482         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3483                 $res{'from_mode'} = $1;
3484                 $res{'to_mode'} = $2;
3485                 $res{'from_id'} = $3;
3486                 $res{'to_id'} = $4;
3487                 $res{'status'} = $5;
3488                 $res{'similarity'} = $6;
3489                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3490                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3491                 } else {
3492                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3493                 }
3494         }
3495         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3496         # combined diff (for merge commit)
3497         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3498                 $res{'nparents'}  = length($1);
3499                 $res{'from_mode'} = [ split(' ', $2) ];
3500                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3501                 $res{'from_id'} = [ split(' ', $3) ];
3502                 $res{'to_id'} = pop @{$res{'from_id'}};
3503                 $res{'status'} = [ split('', $4) ];
3504                 $res{'to_file'} = unquote($5);
3505         }
3506         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3507         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3508                 $res{'commit'} = $1;
3509         }
3510
3511         return wantarray ? %res : \%res;
3512 }
3513
3514 # wrapper: return parsed line of git-diff-tree "raw" output
3515 # (the argument might be raw line, or parsed info)
3516 sub parsed_difftree_line {
3517         my $line_or_ref = shift;
3518
3519         if (ref($line_or_ref) eq "HASH") {
3520                 # pre-parsed (or generated by hand)
3521                 return $line_or_ref;
3522         } else {
3523                 return parse_difftree_raw_line($line_or_ref);
3524         }
3525 }
3526
3527 # parse line of git-ls-tree output
3528 sub parse_ls_tree_line {
3529         my $line = shift;
3530         my %opts = @_;
3531         my %res;
3532
3533         if ($opts{'-l'}) {
3534                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3535                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3536
3537                 $res{'mode'} = $1;
3538                 $res{'type'} = $2;
3539                 $res{'hash'} = $3;
3540                 $res{'size'} = $4;
3541                 if ($opts{'-z'}) {
3542                         $res{'name'} = $5;
3543                 } else {
3544                         $res{'name'} = unquote($5);
3545                 }
3546         } else {
3547                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3548                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3549
3550                 $res{'mode'} = $1;
3551                 $res{'type'} = $2;
3552                 $res{'hash'} = $3;
3553                 if ($opts{'-z'}) {
3554                         $res{'name'} = $4;
3555                 } else {
3556                         $res{'name'} = unquote($4);
3557                 }
3558         }
3559
3560         return wantarray ? %res : \%res;
3561 }
3562
3563 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3564 sub parse_from_to_diffinfo {
3565         my ($diffinfo, $from, $to, @parents) = @_;
3566
3567         if ($diffinfo->{'nparents'}) {
3568                 # combined diff
3569                 $from->{'file'} = [];
3570                 $from->{'href'} = [];
3571                 fill_from_file_info($diffinfo, @parents)
3572                         unless exists $diffinfo->{'from_file'};
3573                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3574                         $from->{'file'}[$i] =
3575                                 defined $diffinfo->{'from_file'}[$i] ?
3576                                         $diffinfo->{'from_file'}[$i] :
3577                                         $diffinfo->{'to_file'};
3578                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3579                                 $from->{'href'}[$i] = href(action=>"blob",
3580                                                            hash_base=>$parents[$i],
3581                                                            hash=>$diffinfo->{'from_id'}[$i],
3582                                                            file_name=>$from->{'file'}[$i]);
3583                         } else {
3584                                 $from->{'href'}[$i] = undef;
3585                         }
3586                 }
3587         } else {
3588                 # ordinary (not combined) diff
3589                 $from->{'file'} = $diffinfo->{'from_file'};
3590                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3591                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3592                                                hash=>$diffinfo->{'from_id'},
3593                                                file_name=>$from->{'file'});
3594                 } else {
3595                         delete $from->{'href'};
3596                 }
3597         }
3598
3599         $to->{'file'} = $diffinfo->{'to_file'};
3600         if (!is_deleted($diffinfo)) { # file exists in result
3601                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3602                                      hash=>$diffinfo->{'to_id'},
3603                                      file_name=>$to->{'file'});
3604         } else {
3605                 delete $to->{'href'};
3606         }
3607 }
3608
3609 ## ......................................................................
3610 ## parse to array of hashes functions
3611
3612 sub git_get_heads_list {
3613         my ($limit, @classes) = @_;
3614         @classes = ('heads') unless @classes;
3615         my @patterns = map { "refs/$_" } @classes;
3616         my @headslist;
3617
3618         open my $fd, '-|', git_cmd(), 'for-each-ref',
3619                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3620                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3621                 @patterns
3622                 or return;
3623         while (my $line = <$fd>) {
3624                 my %ref_item;
3625
3626                 chomp $line;
3627                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3628                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3629                 my ($committer, $epoch, $tz) =
3630                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3631                 $ref_item{'fullname'}  = $name;
3632                 $name =~ s!^refs/(?:head|remote)s/!!;
3633
3634                 $ref_item{'name'}  = $name;
3635                 $ref_item{'id'}    = $hash;
3636                 $ref_item{'title'} = $title || '(no commit message)';
3637                 $ref_item{'epoch'} = $epoch;
3638                 if ($epoch) {
3639                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3640                 } else {
3641                         $ref_item{'age'} = "unknown";
3642                 }
3643
3644                 push @headslist, \%ref_item;
3645         }
3646         close $fd;
3647
3648         return wantarray ? @headslist : \@headslist;
3649 }
3650
3651 sub git_get_tags_list {
3652         my $limit = shift;
3653         my @tagslist;
3654
3655         open my $fd, '-|', git_cmd(), 'for-each-ref',
3656                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3657                 '--format=%(objectname) %(objecttype) %(refname) '.
3658                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3659                 'refs/tags'
3660                 or return;
3661         while (my $line = <$fd>) {
3662                 my %ref_item;
3663
3664                 chomp $line;
3665                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3666                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3667                 my ($creator, $epoch, $tz) =
3668                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3669                 $ref_item{'fullname'} = $name;
3670                 $name =~ s!^refs/tags/!!;
3671
3672                 $ref_item{'type'} = $type;
3673                 $ref_item{'id'} = $id;
3674                 $ref_item{'name'} = $name;
3675                 if ($type eq "tag") {
3676                         $ref_item{'subject'} = $title;
3677                         $ref_item{'reftype'} = $reftype;
3678                         $ref_item{'refid'}   = $refid;
3679                 } else {
3680                         $ref_item{'reftype'} = $type;
3681                         $ref_item{'refid'}   = $id;
3682                 }
3683
3684                 if ($type eq "tag" || $type eq "commit") {
3685                         $ref_item{'epoch'} = $epoch;
3686                         if ($epoch) {
3687                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3688                         } else {
3689                                 $ref_item{'age'} = "unknown";
3690                         }
3691                 }
3692
3693                 push @tagslist, \%ref_item;
3694         }
3695         close $fd;
3696
3697         return wantarray ? @tagslist : \@tagslist;
3698 }
3699
3700 ## ----------------------------------------------------------------------
3701 ## filesystem-related functions
3702
3703 sub get_file_owner {
3704         my $path = shift;
3705
3706         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3707         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3708         if (!defined $gcos) {
3709                 return undef;
3710         }
3711         my $owner = $gcos;
3712         $owner =~ s/[,;].*$//;
3713         return to_utf8($owner);
3714 }
3715
3716 # assume that file exists
3717 sub insert_file {
3718         my $filename = shift;
3719
3720         open my $fd, '<', $filename;
3721         print map { to_utf8($_) } <$fd>;
3722         close $fd;
3723 }
3724
3725 ## ......................................................................
3726 ## mimetype related functions
3727
3728 sub mimetype_guess_file {
3729         my $filename = shift;
3730         my $mimemap = shift;
3731         -r $mimemap or return undef;
3732
3733         my %mimemap;
3734         open(my $mh, '<', $mimemap) or return undef;
3735         while (<$mh>) {
3736                 next if m/^#/; # skip comments
3737                 my ($mimetype, @exts) = split(/\s+/);
3738                 foreach my $ext (@exts) {
3739                         $mimemap{$ext} = $mimetype;
3740                 }
3741         }
3742         close($mh);
3743
3744         $filename =~ /\.([^.]*)$/;
3745         return $mimemap{$1};
3746 }
3747
3748 sub mimetype_guess {
3749         my $filename = shift;
3750         my $mime;
3751         $filename =~ /\./ or return undef;
3752
3753         if ($mimetypes_file) {
3754                 my $file = $mimetypes_file;
3755                 if ($file !~ m!^/!) { # if it is relative path
3756                         # it is relative to project
3757                         $file = "$projectroot/$project/$file";
3758                 }
3759                 $mime = mimetype_guess_file($filename, $file);
3760         }
3761         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3762         return $mime;
3763 }
3764
3765 sub blob_mimetype {
3766         my $fd = shift;
3767         my $filename = shift;
3768
3769         if ($filename) {
3770                 my $mime = mimetype_guess($filename);
3771                 $mime and return $mime;
3772         }
3773
3774         # just in case
3775         return $default_blob_plain_mimetype unless $fd;
3776
3777         if (-T $fd) {
3778                 return 'text/plain';
3779         } elsif (! $filename) {
3780                 return 'application/octet-stream';
3781         } elsif ($filename =~ m/\.png$/i) {
3782                 return 'image/png';
3783         } elsif ($filename =~ m/\.gif$/i) {
3784                 return 'image/gif';
3785         } elsif ($filename =~ m/\.jpe?g$/i) {
3786                 return 'image/jpeg';
3787         } else {
3788                 return 'application/octet-stream';
3789         }
3790 }
3791
3792 sub blob_contenttype {
3793         my ($fd, $file_name, $type) = @_;
3794
3795         $type ||= blob_mimetype($fd, $file_name);
3796         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3797                 $type .= "; charset=$default_text_plain_charset";
3798         }
3799
3800         return $type;
3801 }
3802
3803 # guess file syntax for syntax highlighting; return undef if no highlighting
3804 # the name of syntax can (in the future) depend on syntax highlighter used
3805 sub guess_file_syntax {
3806         my ($highlight, $mimetype, $file_name) = @_;
3807         return undef unless ($highlight && defined $file_name);
3808         my $basename = basename($file_name, '.in');
3809         return $highlight_basename{$basename}
3810                 if exists $highlight_basename{$basename};
3811
3812         $basename =~ /\.([^.]*)$/;
3813         my $ext = $1 or return undef;
3814         return $highlight_ext{$ext}
3815                 if exists $highlight_ext{$ext};
3816
3817         return undef;
3818 }
3819
3820 # run highlighter and return FD of its output,
3821 # or return original FD if no highlighting
3822 sub run_highlighter {
3823         my ($fd, $highlight, $syntax) = @_;
3824         return $fd unless ($highlight && defined $syntax);
3825
3826         close $fd;
3827         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3828                   quote_command($highlight_bin).
3829                   " --replace-tabs=8 --fragment --syntax $syntax |"
3830                 or die_error(500, "Couldn't open file or run syntax highlighter");
3831         return $fd;
3832 }
3833
3834 ## ======================================================================
3835 ## functions printing HTML: header, footer, error page
3836
3837 sub get_page_title {
3838         my $title = to_utf8($site_name);
3839
3840         unless (defined $project) {
3841                 if (defined $project_filter) {
3842                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3843                 }
3844                 return $title;
3845         }
3846         $title .= " - " . to_utf8($project);
3847
3848         return $title unless (defined $action);
3849         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3850
3851         return $title unless (defined $file_name);
3852         $title .= " - " . esc_path($file_name);
3853         if ($action eq "tree" && $file_name !~ m|/$|) {
3854                 $title .= "/";
3855         }
3856
3857         return $title;
3858 }
3859
3860 sub get_content_type_html {
3861         # require explicit support from the UA if we are to send the page as
3862         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3863         # we have to do this because MSIE sometimes globs '*/*', pretending to
3864         # support xhtml+xml but choking when it gets what it asked for.
3865         if (defined $cgi->http('HTTP_ACCEPT') &&
3866             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3867             $cgi->Accept('application/xhtml+xml') != 0) {
3868                 return 'application/xhtml+xml';
3869         } else {
3870                 return 'text/html';
3871         }
3872 }
3873
3874 sub print_feed_meta {
3875         if (defined $project) {
3876                 my %href_params = get_feed_info();
3877                 if (!exists $href_params{'-title'}) {
3878                         $href_params{'-title'} = 'log';
3879                 }
3880
3881                 foreach my $format (qw(RSS Atom)) {
3882                         my $type = lc($format);
3883                         my %link_attr = (
3884                                 '-rel' => 'alternate',
3885                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3886                                 '-type' => "application/$type+xml"
3887                         );
3888
3889                         $href_params{'action'} = $type;
3890                         $link_attr{'-href'} = href(%href_params);
3891                         print "<link ".
3892                               "rel=\"$link_attr{'-rel'}\" ".
3893                               "title=\"$link_attr{'-title'}\" ".
3894                               "href=\"$link_attr{'-href'}\" ".
3895                               "type=\"$link_attr{'-type'}\" ".
3896                               "/>\n";
3897
3898                         $href_params{'extra_options'} = '--no-merges';
3899                         $link_attr{'-href'} = href(%href_params);
3900                         $link_attr{'-title'} .= ' (no merges)';
3901                         print "<link ".
3902                               "rel=\"$link_attr{'-rel'}\" ".
3903                               "title=\"$link_attr{'-title'}\" ".
3904                               "href=\"$link_attr{'-href'}\" ".
3905                               "type=\"$link_attr{'-type'}\" ".
3906                               "/>\n";
3907                 }
3908
3909         } else {
3910                 printf('<link rel="alternate" title="%s projects list" '.
3911                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3912                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3913                 printf('<link rel="alternate" title="%s projects feeds" '.
3914                        'href="%s" type="text/x-opml" />'."\n",
3915                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3916         }
3917 }
3918
3919 sub print_header_links {
3920         my $status = shift;
3921
3922         # print out each stylesheet that exist, providing backwards capability
3923         # for those people who defined $stylesheet in a config file
3924         if (defined $stylesheet) {
3925                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3926         } else {
3927                 foreach my $stylesheet (@stylesheets) {
3928                         next unless $stylesheet;
3929                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3930                 }
3931         }
3932         print_feed_meta()
3933                 if ($status eq '200 OK');
3934         if (defined $favicon) {
3935                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3936         }
3937 }
3938
3939 sub print_nav_breadcrumbs_path {
3940         my $dirprefix = undef;
3941         while (my $part = shift) {
3942                 $dirprefix .= "/" if defined $dirprefix;
3943                 $dirprefix .= $part;
3944                 print $cgi->a({-href => href(project => undef,
3945                                              project_filter => $dirprefix,
3946                                              action => "project_list")},
3947                               esc_html($part)) . " / ";
3948         }
3949 }
3950
3951 sub print_nav_breadcrumbs {
3952         my %opts = @_;
3953
3954         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3955         if (defined $project) {
3956                 my @dirname = split '/', $project;
3957                 my $projectbasename = pop @dirname;
3958                 print_nav_breadcrumbs_path(@dirname);
3959                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3960                 if (defined $action) {
3961                         my $action_print = $action ;
3962                         if (defined $opts{-action_extra}) {
3963                                 $action_print = $cgi->a({-href => href(action=>$action)},
3964                                         $action);
3965                         }
3966                         print " / $action_print";
3967                 }
3968                 if (defined $opts{-action_extra}) {
3969                         print " / $opts{-action_extra}";
3970                 }
3971                 print "\n";
3972         } elsif (defined $project_filter) {
3973                 print_nav_breadcrumbs_path(split '/', $project_filter);
3974         }
3975 }
3976
3977 sub print_search_form {
3978         if (!defined $searchtext) {
3979                 $searchtext = "";
3980         }
3981         my $search_hash;
3982         if (defined $hash_base) {
3983                 $search_hash = $hash_base;
3984         } elsif (defined $hash) {
3985                 $search_hash = $hash;
3986         } else {
3987                 $search_hash = "HEAD";
3988         }
3989         my $action = $my_uri;
3990         my $use_pathinfo = gitweb_check_feature('pathinfo');
3991         if ($use_pathinfo) {
3992                 $action .= "/".esc_url($project);
3993         }
3994         print $cgi->startform(-method => "get", -action => $action) .
3995               "<div class=\"search\">\n" .
3996               (!$use_pathinfo &&
3997               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3998               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3999               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4000               $cgi->popup_menu(-name => 'st', -default => 'commit',
4001                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4002               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4003               " search:\n",
4004               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4005               "<span title=\"Extended regular expression\">" .
4006               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4007                              -checked => $search_use_regexp) .
4008               "</span>" .
4009               "</div>" .
4010               $cgi->end_form() . "\n";
4011 }
4012
4013 sub git_header_html {
4014         my $status = shift || "200 OK";
4015         my $expires = shift;
4016         my %opts = @_;
4017
4018         my $title = get_page_title();
4019         my $content_type = get_content_type_html();
4020         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4021                            -status=> $status, -expires => $expires)
4022                 unless ($opts{'-no_http_header'});
4023         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4024         print <<EOF;
4025 <?xml version="1.0" encoding="utf-8"?>
4026 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4027 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4028 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4029 <!-- git core binaries version $git_version -->
4030 <head>
4031 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4032 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4033 <meta name="robots" content="index, nofollow"/>
4034 <title>$title</title>
4035 EOF
4036         # the stylesheet, favicon etc urls won't work correctly with path_info
4037         # unless we set the appropriate base URL
4038         if ($ENV{'PATH_INFO'}) {
4039                 print "<base href=\"".esc_url($base_url)."\" />\n";
4040         }
4041         print_header_links($status);
4042
4043         if (defined $site_html_head_string) {
4044                 print to_utf8($site_html_head_string);
4045         }
4046
4047         print "</head>\n" .
4048               "<body>\n";
4049
4050         if (defined $site_header && -f $site_header) {
4051                 insert_file($site_header);
4052         }
4053
4054         print "<div class=\"page_header\">\n";
4055         if (defined $logo) {
4056                 print $cgi->a({-href => esc_url($logo_url),
4057                                -title => $logo_label},
4058                               $cgi->img({-src => esc_url($logo),
4059                                          -width => 72, -height => 27,
4060                                          -alt => "git",
4061                                          -class => "logo"}));
4062         }
4063         print_nav_breadcrumbs(%opts);
4064         print "</div>\n";
4065
4066         my $have_search = gitweb_check_feature('search');
4067         if (defined $project && $have_search) {
4068                 print_search_form();
4069         }
4070 }
4071
4072 sub git_footer_html {
4073         my $feed_class = 'rss_logo';
4074
4075         print "<div class=\"page_footer\">\n";
4076         if (defined $project) {
4077                 my $descr = git_get_project_description($project);
4078                 if (defined $descr) {
4079                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4080                 }
4081
4082                 my %href_params = get_feed_info();
4083                 if (!%href_params) {
4084                         $feed_class .= ' generic';
4085                 }
4086                 $href_params{'-title'} ||= 'log';
4087
4088                 foreach my $format (qw(RSS Atom)) {
4089                         $href_params{'action'} = lc($format);
4090                         print $cgi->a({-href => href(%href_params),
4091                                       -title => "$href_params{'-title'} $format feed",
4092                                       -class => $feed_class}, $format)."\n";
4093                 }
4094
4095         } else {
4096                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4097                                              project_filter => $project_filter),
4098                               -class => $feed_class}, "OPML") . " ";
4099                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4100                                              project_filter => $project_filter),
4101                               -class => $feed_class}, "TXT") . "\n";
4102         }
4103         print "</div>\n"; # class="page_footer"
4104
4105         if (defined $t0 && gitweb_check_feature('timed')) {
4106                 print "<div id=\"generating_info\">\n";
4107                 print 'This page took '.
4108                       '<span id="generating_time" class="time_span">'.
4109                       tv_interval($t0, [ gettimeofday() ]).
4110                       ' seconds </span>'.
4111                       ' and '.
4112                       '<span id="generating_cmd">'.
4113                       $number_of_git_cmds.
4114                       '</span> git commands '.
4115                       " to generate.\n";
4116                 print "</div>\n"; # class="page_footer"
4117         }
4118
4119         if (defined $site_footer && -f $site_footer) {
4120                 insert_file($site_footer);
4121         }
4122
4123         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4124         if (defined $action &&
4125             $action eq 'blame_incremental') {
4126                 print qq!<script type="text/javascript">\n!.
4127                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4128                       qq!           "!. href() .qq!");\n!.
4129                       qq!</script>\n!;
4130         } else {
4131                 my ($jstimezone, $tz_cookie, $datetime_class) =
4132                         gitweb_get_feature('javascript-timezone');
4133
4134                 print qq!<script type="text/javascript">\n!.
4135                       qq!window.onload = function () {\n!;
4136                 if (gitweb_check_feature('javascript-actions')) {
4137                         print qq!       fixLinks();\n!;
4138                 }
4139                 if ($jstimezone && $tz_cookie && $datetime_class) {
4140                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4141                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4142                 }
4143                 print qq!};\n!.
4144                       qq!</script>\n!;
4145         }
4146
4147         print "</body>\n" .
4148               "</html>";
4149 }
4150
4151 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4152 # Example: die_error(404, 'Hash not found')
4153 # By convention, use the following status codes (as defined in RFC 2616):
4154 # 400: Invalid or missing CGI parameters, or
4155 #      requested object exists but has wrong type.
4156 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4157 #      this server or project.
4158 # 404: Requested object/revision/project doesn't exist.
4159 # 500: The server isn't configured properly, or
4160 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4161 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4162 # 503: The server is currently unavailable (because it is overloaded,
4163 #      or down for maintenance).  Generally, this is a temporary state.
4164 sub die_error {
4165         my $status = shift || 500;
4166         my $error = esc_html(shift) || "Internal Server Error";
4167         my $extra = shift;
4168         my %opts = @_;
4169
4170         my %http_responses = (
4171                 400 => '400 Bad Request',
4172                 403 => '403 Forbidden',
4173                 404 => '404 Not Found',
4174                 500 => '500 Internal Server Error',
4175                 503 => '503 Service Unavailable',
4176         );
4177         git_header_html($http_responses{$status}, undef, %opts);
4178         print <<EOF;
4179 <div class="page_body">
4180 <br /><br />
4181 $status - $error
4182 <br />
4183 EOF
4184         if (defined $extra) {
4185                 print "<hr />\n" .
4186                       "$extra\n";
4187         }
4188         print "</div>\n";
4189
4190         git_footer_html();
4191         goto DONE_GITWEB
4192                 unless ($opts{'-error_handler'});
4193 }
4194
4195 ## ----------------------------------------------------------------------
4196 ## functions printing or outputting HTML: navigation
4197
4198 sub git_print_page_nav {
4199         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4200         $extra = '' if !defined $extra; # pager or formats
4201
4202         my @navs = qw(summary shortlog log commit commitdiff tree);
4203         if ($suppress) {
4204                 @navs = grep { $_ ne $suppress } @navs;
4205         }
4206
4207         my %arg = map { $_ => {action=>$_} } @navs;
4208         if (defined $head) {
4209                 for (qw(commit commitdiff)) {
4210                         $arg{$_}{'hash'} = $head;
4211                 }
4212                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4213                         for (qw(shortlog log)) {
4214                                 $arg{$_}{'hash'} = $head;
4215                         }
4216                 }
4217         }
4218
4219         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4220         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4221
4222         my @actions = gitweb_get_feature('actions');
4223         my %repl = (
4224                 '%' => '%',
4225                 'n' => $project,         # project name
4226                 'f' => $git_dir,         # project path within filesystem
4227                 'h' => $treehead || '',  # current hash ('h' parameter)
4228                 'b' => $treebase || '',  # hash base ('hb' parameter)
4229         );
4230         while (@actions) {
4231                 my ($label, $link, $pos) = splice(@actions,0,3);
4232                 # insert
4233                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4234                 # munch munch
4235                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4236                 $arg{$label}{'_href'} = $link;
4237         }
4238
4239         print "<div class=\"page_nav\">\n" .
4240                 (join " | ",
4241                  map { $_ eq $current ?
4242                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4243                  } @navs);
4244         print "<br/>\n$extra<br/>\n" .
4245               "</div>\n";
4246 }
4247
4248 # returns a submenu for the nagivation of the refs views (tags, heads,
4249 # remotes) with the current view disabled and the remotes view only
4250 # available if the feature is enabled
4251 sub format_ref_views {
4252         my ($current) = @_;
4253         my @ref_views = qw{tags heads};
4254         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4255         return join " | ", map {
4256                 $_ eq $current ? $_ :
4257                 $cgi->a({-href => href(action=>$_)}, $_)
4258         } @ref_views
4259 }
4260
4261 sub format_paging_nav {
4262         my ($action, $page, $has_next_link) = @_;
4263         my $paging_nav;
4264
4265
4266         if ($page > 0) {
4267                 $paging_nav .=
4268                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4269                         " &sdot; " .
4270                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4271                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4272         } else {
4273                 $paging_nav .= "first &sdot; prev";
4274         }
4275
4276         if ($has_next_link) {
4277                 $paging_nav .= " &sdot; " .
4278                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4279                                  -accesskey => "n", -title => "Alt-n"}, "next");
4280         } else {
4281                 $paging_nav .= " &sdot; next";
4282         }
4283
4284         return $paging_nav;
4285 }
4286
4287 ## ......................................................................
4288 ## functions printing or outputting HTML: div
4289
4290 sub git_print_header_div {
4291         my ($action, $title, $hash, $hash_base) = @_;
4292         my %args = ();
4293
4294         $args{'action'} = $action;
4295         $args{'hash'} = $hash if $hash;
4296         $args{'hash_base'} = $hash_base if $hash_base;
4297
4298         print "<div class=\"header\">\n" .
4299               $cgi->a({-href => href(%args), -class => "title"},
4300               $title ? $title : $action) .
4301               "\n</div>\n";
4302 }
4303
4304 sub format_repo_url {
4305         my ($name, $url) = @_;
4306         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4307 }
4308
4309 # Group output by placing it in a DIV element and adding a header.
4310 # Options for start_div() can be provided by passing a hash reference as the
4311 # first parameter to the function.
4312 # Options to git_print_header_div() can be provided by passing an array
4313 # reference. This must follow the options to start_div if they are present.
4314 # The content can be a scalar, which is output as-is, a scalar reference, which
4315 # is output after html escaping, an IO handle passed either as *handle or
4316 # *handle{IO}, or a function reference. In the latter case all following
4317 # parameters will be taken as argument to the content function call.
4318 sub git_print_section {
4319         my ($div_args, $header_args, $content);
4320         my $arg = shift;
4321         if (ref($arg) eq 'HASH') {
4322                 $div_args = $arg;
4323                 $arg = shift;
4324         }
4325         if (ref($arg) eq 'ARRAY') {
4326                 $header_args = $arg;
4327                 $arg = shift;
4328         }
4329         $content = $arg;
4330
4331         print $cgi->start_div($div_args);
4332         git_print_header_div(@$header_args);
4333
4334         if (ref($content) eq 'CODE') {
4335                 $content->(@_);
4336         } elsif (ref($content) eq 'SCALAR') {
4337                 print esc_html($$content);
4338         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4339                 print <$content>;
4340         } elsif (!ref($content) && defined($content)) {
4341                 print $content;
4342         }
4343
4344         print $cgi->end_div;
4345 }
4346
4347 sub format_timestamp_html {
4348         my $date = shift;
4349         my $strtime = $date->{'rfc2822'};
4350
4351         my (undef, undef, $datetime_class) =
4352                 gitweb_get_feature('javascript-timezone');
4353         if ($datetime_class) {
4354                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4355         }
4356
4357         my $localtime_format = '(%02d:%02d %s)';
4358         if ($date->{'hour_local'} < 6) {
4359                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4360         }
4361         $strtime .= ' ' .
4362                     sprintf($localtime_format,
4363                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4364
4365         return $strtime;
4366 }
4367
4368 # Outputs the author name and date in long form
4369 sub git_print_authorship {
4370         my $co = shift;
4371         my %opts = @_;
4372         my $tag = $opts{-tag} || 'div';
4373         my $author = $co->{'author_name'};
4374
4375         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4376         print "<$tag class=\"author_date\">" .
4377               format_search_author($author, "author", esc_html($author)) .
4378               " [".format_timestamp_html(\%ad)."]".
4379               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4380               "</$tag>\n";
4381 }
4382
4383 # Outputs table rows containing the full author or committer information,
4384 # in the format expected for 'commit' view (& similar).
4385 # Parameters are a commit hash reference, followed by the list of people
4386 # to output information for. If the list is empty it defaults to both
4387 # author and committer.
4388 sub git_print_authorship_rows {
4389         my $co = shift;
4390         # too bad we can't use @people = @_ || ('author', 'committer')
4391         my @people = @_;
4392         @people = ('author', 'committer') unless @people;
4393         foreach my $who (@people) {
4394                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4395                 print "<tr><td>$who</td><td>" .
4396                       format_search_author($co->{"${who}_name"}, $who,
4397                                            esc_html($co->{"${who}_name"})) . " " .
4398                       format_search_author($co->{"${who}_email"}, $who,
4399                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4400                       "</td><td rowspan=\"2\">" .
4401                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4402                       "</td></tr>\n" .
4403                       "<tr>" .
4404                       "<td></td><td>" .
4405                       format_timestamp_html(\%wd) .
4406                       "</td>" .
4407                       "</tr>\n";
4408         }
4409 }
4410
4411 sub git_print_page_path {
4412         my $name = shift;
4413         my $type = shift;
4414         my $hb = shift;
4415
4416
4417         print "<div class=\"page_path\">";
4418         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4419                       -title => 'tree root'}, to_utf8("[$project]"));
4420         print " / ";
4421         if (defined $name) {
4422                 my @dirname = split '/', $name;
4423                 my $basename = pop @dirname;
4424                 my $fullname = '';
4425
4426                 foreach my $dir (@dirname) {
4427                         $fullname .= ($fullname ? '/' : '') . $dir;
4428                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4429                                                      hash_base=>$hb),
4430                                       -title => $fullname}, esc_path($dir));
4431                         print " / ";
4432                 }
4433                 if (defined $type && $type eq 'blob') {
4434                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4435                                                      hash_base=>$hb),
4436                                       -title => $name}, esc_path($basename));
4437                         if (gitweb_check_feature('highlight')) {
4438                                 print '&nbsp;&nbsp;&nbsp;&nbsp;
4439 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4440 <script>
4441 function toggleLineNumbers() {
4442         e = document.getElementById("lineNoStyle");
4443         e2 = document.getElementById("lineNoToggle");
4444         if (e2.innerHTML == "[Hide line numbers]") {
4445                 e.innerHTML = ".linenr { display:none; }";
4446                 e2.innerHTML = "[Show line numbers]";
4447         }
4448         else {
4449                 e.innerHTML = "";
4450                 e2.innerHTML = "[Hide line numbers]";
4451         }
4452 }
4453 var style = document.createElement("style");
4454 style.setAttribute("id", "lineNoStyle");
4455 document.getElementsByTagName("head")[0].appendChild(style);
4456 toggleLineNumbers();
4457 </script>
4458 ';
4459                         }
4460                 } elsif (defined $type && $type eq 'tree') {
4461                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4462                                                      hash_base=>$hb),
4463                                       -title => $name}, esc_path($basename));
4464                         print " / ";
4465                 } else {
4466                         print esc_path($basename);
4467                 }
4468         }
4469         print "<br/></div>\n";
4470 }
4471
4472 sub git_print_log {
4473         my $log = shift;
4474         my %opts = @_;
4475
4476         if ($opts{'-remove_title'}) {
4477                 # remove title, i.e. first line of log
4478                 shift @$log;
4479         }
4480         # remove leading empty lines
4481         while (defined $log->[0] && $log->[0] eq "") {
4482                 shift @$log;
4483         }
4484
4485         # print log
4486         my $signoff = 0;
4487         my $empty = 0;
4488         foreach my $line (@$log) {
4489                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4490                         $signoff = 1;
4491                         $empty = 0;
4492                         if (! $opts{'-remove_signoff'}) {
4493                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4494                                 next;
4495                         } else {
4496                                 # remove signoff lines
4497                                 next;
4498                         }
4499                 } else {
4500                         $signoff = 0;
4501                 }
4502
4503                 # print only one empty line
4504                 # do not print empty line after signoff
4505                 if ($line eq "") {
4506                         next if ($empty || $signoff);
4507                         $empty = 1;
4508                 } else {
4509                         $empty = 0;
4510                 }
4511
4512                 print format_log_line_html($line) . "<br/>\n";
4513         }
4514
4515         if ($opts{'-final_empty_line'}) {
4516                 # end with single empty line
4517                 print "<br/>\n" unless $empty;
4518         }
4519 }
4520
4521 # return link target (what link points to)
4522 sub git_get_link_target {
4523         my $hash = shift;
4524         my $link_target;
4525
4526         # read link
4527         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4528                 or return;
4529         {
4530                 local $/ = undef;
4531                 $link_target = <$fd>;
4532         }
4533         close $fd
4534                 or return;
4535
4536         return $link_target;
4537 }
4538
4539 # given link target, and the directory (basedir) the link is in,
4540 # return target of link relative to top directory (top tree);
4541 # return undef if it is not possible (including absolute links).
4542 sub normalize_link_target {
4543         my ($link_target, $basedir) = @_;
4544
4545         # absolute symlinks (beginning with '/') cannot be normalized
4546         return if (substr($link_target, 0, 1) eq '/');
4547
4548         # normalize link target to path from top (root) tree (dir)
4549         my $path;
4550         if ($basedir) {
4551                 $path = $basedir . '/' . $link_target;
4552         } else {
4553                 # we are in top (root) tree (dir)
4554                 $path = $link_target;
4555         }
4556
4557         # remove //, /./, and /../
4558         my @path_parts;
4559         foreach my $part (split('/', $path)) {
4560                 # discard '.' and ''
4561                 next if (!$part || $part eq '.');
4562                 # handle '..'
4563                 if ($part eq '..') {
4564                         if (@path_parts) {
4565                                 pop @path_parts;
4566                         } else {
4567                                 # link leads outside repository (outside top dir)
4568                                 return;
4569                         }
4570                 } else {
4571                         push @path_parts, $part;
4572                 }
4573         }
4574         $path = join('/', @path_parts);
4575
4576         return $path;
4577 }
4578
4579 # print tree entry (row of git_tree), but without encompassing <tr> element
4580 sub git_print_tree_entry {
4581         my ($t, $basedir, $hash_base, $have_blame) = @_;
4582
4583         my %base_key = ();
4584         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4585
4586         # The format of a table row is: mode list link.  Where mode is
4587         # the mode of the entry, list is the name of the entry, an href,
4588         # and link is the action links of the entry.
4589
4590         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4591         if (exists $t->{'size'}) {
4592                 print "<td class=\"size\">$t->{'size'}</td>\n";
4593         }
4594         if ($t->{'type'} eq "blob") {
4595                 print "<td class=\"list\">" .
4596                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4597                                                file_name=>"$basedir$t->{'name'}", %base_key),
4598                                 -class => "list"}, esc_path($t->{'name'}));
4599                 if (S_ISLNK(oct $t->{'mode'})) {
4600                         my $link_target = git_get_link_target($t->{'hash'});
4601                         if ($link_target) {
4602                                 my $norm_target = normalize_link_target($link_target, $basedir);
4603                                 if (defined $norm_target) {
4604                                         print " -> " .
4605                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4606                                                                      file_name=>$norm_target),
4607                                                        -title => $norm_target}, esc_path($link_target));
4608                                 } else {
4609                                         print " -> " . esc_path($link_target);
4610                                 }
4611                         }
4612                 }
4613                 print "</td>\n";
4614                 print "<td class=\"link\">";
4615                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4616                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4617                               "blob");
4618                 if ($have_blame) {
4619                         print " | " .
4620                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4621                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4622                                       "blame");
4623                 }
4624                 if (defined $hash_base) {
4625                         print " | " .
4626                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4627                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4628                                       "history");
4629                 }
4630                 print " | " .
4631                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4632                                                file_name=>"$basedir$t->{'name'}")},
4633                                 "raw");
4634                 print "</td>\n";
4635
4636         } elsif ($t->{'type'} eq "tree") {
4637                 print "<td class=\"list\">";
4638                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4639                                              file_name=>"$basedir$t->{'name'}",
4640                                              %base_key)},
4641                               esc_path($t->{'name'}));
4642                 print "</td>\n";
4643                 print "<td class=\"link\">";
4644                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4645                                              file_name=>"$basedir$t->{'name'}",
4646                                              %base_key)},
4647                               "tree");
4648                 if (defined $hash_base) {
4649                         print " | " .
4650                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4651                                                      file_name=>"$basedir$t->{'name'}")},
4652                                       "history");
4653                 }
4654                 print "</td>\n";
4655         } else {
4656                 # unknown object: we can only present history for it
4657                 # (this includes 'commit' object, i.e. submodule support)
4658                 print "<td class=\"list\">" .
4659                       esc_path($t->{'name'}) .
4660                       "</td>\n";
4661                 print "<td class=\"link\">";
4662                 if (defined $hash_base) {
4663                         print $cgi->a({-href => href(action=>"history",
4664                                                      hash_base=>$hash_base,
4665                                                      file_name=>"$basedir$t->{'name'}")},
4666                                       "history");
4667                 }
4668                 print "</td>\n";
4669         }
4670 }
4671
4672 ## ......................................................................
4673 ## functions printing large fragments of HTML
4674
4675 # get pre-image filenames for merge (combined) diff
4676 sub fill_from_file_info {
4677         my ($diff, @parents) = @_;
4678
4679         $diff->{'from_file'} = [ ];
4680         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4681         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4682                 if ($diff->{'status'}[$i] eq 'R' ||
4683                     $diff->{'status'}[$i] eq 'C') {
4684                         $diff->{'from_file'}[$i] =
4685                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4686                 }
4687         }
4688
4689         return $diff;
4690 }
4691
4692 # is current raw difftree line of file deletion
4693 sub is_deleted {
4694         my $diffinfo = shift;
4695
4696         return $diffinfo->{'to_id'} eq ('0' x 40);
4697 }
4698
4699 # does patch correspond to [previous] difftree raw line
4700 # $diffinfo  - hashref of parsed raw diff format
4701 # $patchinfo - hashref of parsed patch diff format
4702 #              (the same keys as in $diffinfo)
4703 sub is_patch_split {
4704         my ($diffinfo, $patchinfo) = @_;
4705
4706         return defined $diffinfo && defined $patchinfo
4707                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4708 }
4709
4710
4711 sub git_difftree_body {
4712         my ($difftree, $hash, @parents) = @_;
4713         my ($parent) = $parents[0];
4714         my $have_blame = gitweb_check_feature('blame');
4715         print "<div class=\"list_head\">\n";
4716         if ($#{$difftree} > 10) {
4717                 print(($#{$difftree} + 1) . " files changed:\n");
4718         }
4719         print "</div>\n";
4720
4721         print "<table class=\"" .
4722               (@parents > 1 ? "combined " : "") .
4723               "diff_tree\">\n";
4724
4725         # header only for combined diff in 'commitdiff' view
4726         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4727         if ($has_header) {
4728                 # table header
4729                 print "<thead><tr>\n" .
4730                        "<th></th><th></th>\n"; # filename, patchN link
4731                 for (my $i = 0; $i < @parents; $i++) {
4732                         my $par = $parents[$i];
4733                         print "<th>" .
4734                               $cgi->a({-href => href(action=>"commitdiff",
4735                                                      hash=>$hash, hash_parent=>$par),
4736                                        -title => 'commitdiff to parent number ' .
4737                                                   ($i+1) . ': ' . substr($par,0,7)},
4738                                       $i+1) .
4739                               "&nbsp;</th>\n";
4740                 }
4741                 print "</tr></thead>\n<tbody>\n";
4742         }
4743
4744         my $alternate = 1;
4745         my $patchno = 0;
4746         foreach my $line (@{$difftree}) {
4747                 my $diff = parsed_difftree_line($line);
4748
4749                 if ($alternate) {
4750                         print "<tr class=\"dark\">\n";
4751                 } else {
4752                         print "<tr class=\"light\">\n";
4753                 }
4754                 $alternate ^= 1;
4755
4756                 if (exists $diff->{'nparents'}) { # combined diff
4757
4758                         fill_from_file_info($diff, @parents)
4759                                 unless exists $diff->{'from_file'};
4760
4761                         if (!is_deleted($diff)) {
4762                                 # file exists in the result (child) commit
4763                                 print "<td>" .
4764                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4765                                                              file_name=>$diff->{'to_file'},
4766                                                              hash_base=>$hash),
4767                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4768                                       "</td>\n";
4769                         } else {
4770                                 print "<td>" .
4771                                       esc_path($diff->{'to_file'}) .
4772                                       "</td>\n";
4773                         }
4774
4775                         if ($action eq 'commitdiff') {
4776                                 # link to patch
4777                                 $patchno++;
4778                                 print "<td class=\"link\">" .
4779                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4780                                               "patch") .
4781                                       " | " .
4782                                       "</td>\n";
4783                         }
4784
4785                         my $has_history = 0;
4786                         my $not_deleted = 0;
4787                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4788                                 my $hash_parent = $parents[$i];
4789                                 my $from_hash = $diff->{'from_id'}[$i];
4790                                 my $from_path = $diff->{'from_file'}[$i];
4791                                 my $status = $diff->{'status'}[$i];
4792
4793                                 $has_history ||= ($status ne 'A');
4794                                 $not_deleted ||= ($status ne 'D');
4795
4796                                 if ($status eq 'A') {
4797                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4798                                 } elsif ($status eq 'D') {
4799                                         print "<td class=\"link\">" .
4800                                               $cgi->a({-href => href(action=>"blob",
4801                                                                      hash_base=>$hash,
4802                                                                      hash=>$from_hash,
4803                                                                      file_name=>$from_path)},
4804                                                       "blob" . ($i+1)) .
4805                                               " | </td>\n";
4806                                 } else {
4807                                         if ($diff->{'to_id'} eq $from_hash) {
4808                                                 print "<td class=\"link nochange\">";
4809                                         } else {
4810                                                 print "<td class=\"link\">";
4811                                         }
4812                                         print $cgi->a({-href => href(action=>"blobdiff",
4813                                                                      hash=>$diff->{'to_id'},
4814                                                                      hash_parent=>$from_hash,
4815                                                                      hash_base=>$hash,
4816                                                                      hash_parent_base=>$hash_parent,
4817                                                                      file_name=>$diff->{'to_file'},
4818                                                                      file_parent=>$from_path)},
4819                                                       "diff" . ($i+1)) .
4820                                               " | </td>\n";
4821                                 }
4822                         }
4823
4824                         print "<td class=\"link\">";
4825                         if ($not_deleted) {
4826                                 print $cgi->a({-href => href(action=>"blob",
4827                                                              hash=>$diff->{'to_id'},
4828                                                              file_name=>$diff->{'to_file'},
4829                                                              hash_base=>$hash)},
4830                                               "blob");
4831                                 print " | " if ($has_history);
4832                         }
4833                         if ($has_history) {
4834                                 print $cgi->a({-href => href(action=>"history",
4835                                                              file_name=>$diff->{'to_file'},
4836                                                              hash_base=>$hash)},
4837                                               "history");
4838                         }
4839                         print "</td>\n";
4840
4841                         print "</tr>\n";
4842                         next; # instead of 'else' clause, to avoid extra indent
4843                 }
4844                 # else ordinary diff
4845
4846                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4847                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4848                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4849                         $to_mode_oct = oct $diff->{'to_mode'};
4850                         if (S_ISREG($to_mode_oct)) { # only for regular file
4851                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4852                         }
4853                         $to_file_type = file_type($diff->{'to_mode'});
4854                 }
4855                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4856                         $from_mode_oct = oct $diff->{'from_mode'};
4857                         if (S_ISREG($from_mode_oct)) { # only for regular file
4858                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4859                         }
4860                         $from_file_type = file_type($diff->{'from_mode'});
4861                 }
4862
4863                 if ($diff->{'status'} eq "A") { # created
4864                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4865                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4866                         $mode_chng   .= "]</span>";
4867                         print "<td>";
4868                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4869                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4870                                       -class => "list"}, esc_path($diff->{'file'}));
4871                         print "</td>\n";
4872                         print "<td>$mode_chng</td>\n";
4873                         print "<td class=\"link\">";
4874                         if ($action eq 'commitdiff') {
4875                                 # link to patch
4876                                 $patchno++;
4877                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4878                                               "patch") .
4879                                       " | ";
4880                         }
4881                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4882                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4883                                       "blob");
4884                         print "</td>\n";
4885
4886                 } elsif ($diff->{'status'} eq "D") { # deleted
4887                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4888                         print "<td>";
4889                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4890                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4891                                        -class => "list"}, esc_path($diff->{'file'}));
4892                         print "</td>\n";
4893                         print "<td>$mode_chng</td>\n";
4894                         print "<td class=\"link\">";
4895                         if ($action eq 'commitdiff') {
4896                                 # link to patch
4897                                 $patchno++;
4898                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4899                                               "patch") .
4900                                       " | ";
4901                         }
4902                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4903                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4904                                       "blob") . " | ";
4905                         if ($have_blame) {
4906                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4907                                                              file_name=>$diff->{'file'})},
4908                                               "blame") . " | ";
4909                         }
4910                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4911                                                      file_name=>$diff->{'file'})},
4912                                       "history");
4913                         print "</td>\n";
4914
4915                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4916                         my $mode_chnge = "";
4917                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4918                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4919                                 if ($from_file_type ne $to_file_type) {
4920                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4921                                 }
4922                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4923                                         if ($from_mode_str && $to_mode_str) {
4924                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4925                                         } elsif ($to_mode_str) {
4926                                                 $mode_chnge .= " mode: $to_mode_str";
4927                                         }
4928                                 }
4929                                 $mode_chnge .= "]</span>\n";
4930                         }
4931                         print "<td>";
4932                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4933                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4934                                       -class => "list"}, esc_path($diff->{'file'}));
4935                         print "</td>\n";
4936                         print "<td>$mode_chnge</td>\n";
4937                         print "<td class=\"link\">";
4938                         if ($action eq 'commitdiff') {
4939                                 # link to patch
4940                                 $patchno++;
4941                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4942                                               "patch") .
4943                                       " | ";
4944                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4945                                 # "commit" view and modified file (not onlu mode changed)
4946                                 print $cgi->a({-href => href(action=>"blobdiff",
4947                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4948                                                              hash_base=>$hash, hash_parent_base=>$parent,
4949                                                              file_name=>$diff->{'file'})},
4950                                               "diff") .
4951                                       " | ";
4952                         }
4953                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4954                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4955                                        "blob") . " | ";
4956                         if ($have_blame) {
4957                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4958                                                              file_name=>$diff->{'file'})},
4959                                               "blame") . " | ";
4960                         }
4961                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4962                                                      file_name=>$diff->{'file'})},
4963                                       "history");
4964                         print "</td>\n";
4965
4966                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4967                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4968                         my $nstatus = $status_name{$diff->{'status'}};
4969                         my $mode_chng = "";
4970                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4971                                 # mode also for directories, so we cannot use $to_mode_str
4972                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4973                         }
4974                         print "<td>" .
4975                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4976                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4977                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4978                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4979                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4980                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4981                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4982                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4983                               "<td class=\"link\">";
4984                         if ($action eq 'commitdiff') {
4985                                 # link to patch
4986                                 $patchno++;
4987                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4988                                               "patch") .
4989                                       " | ";
4990                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4991                                 # "commit" view and modified file (not only pure rename or copy)
4992                                 print $cgi->a({-href => href(action=>"blobdiff",
4993                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4994                                                              hash_base=>$hash, hash_parent_base=>$parent,
4995                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4996                                               "diff") .
4997                                       " | ";
4998                         }
4999                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5000                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5001                                       "blob") . " | ";
5002                         if ($have_blame) {
5003                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5004                                                              file_name=>$diff->{'to_file'})},
5005                                               "blame") . " | ";
5006                         }
5007                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5008                                                     file_name=>$diff->{'to_file'})},
5009                                       "history");
5010                         print "</td>\n";
5011
5012                 } # we should not encounter Unmerged (U) or Unknown (X) status
5013                 print "</tr>\n";
5014         }
5015         print "</tbody>" if $has_header;
5016         print "</table>\n";
5017 }
5018
5019 sub print_sidebyside_diff_chunk {
5020         my @chunk = @_;
5021         my (@ctx, @rem, @add);
5022
5023         return unless @chunk;
5024
5025         # incomplete last line might be among removed or added lines,
5026         # or both, or among context lines: find which
5027         for (my $i = 1; $i < @chunk; $i++) {
5028                 if ($chunk[$i][0] eq 'incomplete') {
5029                         $chunk[$i][0] = $chunk[$i-1][0];
5030                 }
5031         }
5032
5033         # guardian
5034         push @chunk, ["", ""];
5035
5036         foreach my $line_info (@chunk) {
5037                 my ($class, $line) = @$line_info;
5038
5039                 # print chunk headers
5040                 if ($class && $class eq 'chunk_header') {
5041                         print $line;
5042                         next;
5043                 }
5044
5045                 ## print from accumulator when type of class of lines change
5046                 # empty contents block on start rem/add block, or end of chunk
5047                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
5048                         print join '',
5049                                 '<div class="chunk_block ctx">',
5050                                         '<div class="old">',
5051                                         @ctx,
5052                                         '</div>',
5053                                         '<div class="new">',
5054                                         @ctx,
5055                                         '</div>',
5056                                 '</div>';
5057                         @ctx = ();
5058                 }
5059                 # empty add/rem block on start context block, or end of chunk
5060                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
5061                         if (!@add) {
5062                                 # pure removal
5063                                 print join '',
5064                                         '<div class="chunk_block rem">',
5065                                                 '<div class="old">',
5066                                                 @rem,
5067                                                 '</div>',
5068                                         '</div>';
5069                         } elsif (!@rem) {
5070                                 # pure addition
5071                                 print join '',
5072                                         '<div class="chunk_block add">',
5073                                                 '<div class="new">',
5074                                                 @add,
5075                                                 '</div>',
5076                                         '</div>';
5077                         } else {
5078                                 # assume that it is change
5079                                 print join '',
5080                                         '<div class="chunk_block chg">',
5081                                                 '<div class="old">',
5082                                                 @rem,
5083                                                 '</div>',
5084                                                 '<div class="new">',
5085                                                 @add,
5086                                                 '</div>',
5087                                         '</div>';
5088                         }
5089                         @rem = @add = ();
5090                 }
5091
5092                 ## adding lines to accumulator
5093                 # guardian value
5094                 last unless $line;
5095                 # rem, add or change
5096                 if ($class eq 'rem') {
5097                         push @rem, $line;
5098                 } elsif ($class eq 'add') {
5099                         push @add, $line;
5100                 }
5101                 # context line
5102                 if ($class eq 'ctx') {
5103                         push @ctx, $line;
5104                 }
5105         }
5106 }
5107
5108 sub git_patchset_body {
5109         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5110         my ($hash_parent) = $hash_parents[0];
5111
5112         my $is_combined = (@hash_parents > 1);
5113         my $patch_idx = 0;
5114         my $patch_number = 0;
5115         my $patch_line;
5116         my $diffinfo;
5117         my $to_name;
5118         my (%from, %to);
5119         my @chunk; # for side-by-side diff
5120
5121         print "<div class=\"patchset\">\n";
5122
5123         # skip to first patch
5124         while ($patch_line = <$fd>) {
5125                 chomp $patch_line;
5126
5127                 last if ($patch_line =~ m/^diff /);
5128         }
5129
5130  PATCH:
5131         while ($patch_line) {
5132
5133                 # parse "git diff" header line
5134                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5135                         # $1 is from_name, which we do not use
5136                         $to_name = unquote($2);
5137                         $to_name =~ s!^b/!!;
5138                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5139                         # $1 is 'cc' or 'combined', which we do not use
5140                         $to_name = unquote($2);
5141                 } else {
5142                         $to_name = undef;
5143                 }
5144
5145                 # check if current patch belong to current raw line
5146                 # and parse raw git-diff line if needed
5147                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5148                         # this is continuation of a split patch
5149                         print "<div class=\"patch cont\">\n";
5150                 } else {
5151                         # advance raw git-diff output if needed
5152                         $patch_idx++ if defined $diffinfo;
5153
5154                         # read and prepare patch information
5155                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5156
5157                         # compact combined diff output can have some patches skipped
5158                         # find which patch (using pathname of result) we are at now;
5159                         if ($is_combined) {
5160                                 while ($to_name ne $diffinfo->{'to_file'}) {
5161                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5162                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5163                                               "</div>\n";  # class="patch"
5164
5165                                         $patch_idx++;
5166                                         $patch_number++;
5167
5168                                         last if $patch_idx > $#$difftree;
5169                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5170                                 }
5171                         }
5172
5173                         # modifies %from, %to hashes
5174                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5175
5176                         # this is first patch for raw difftree line with $patch_idx index
5177                         # we index @$difftree array from 0, but number patches from 1
5178                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5179                 }
5180
5181                 # git diff header
5182                 #assert($patch_line =~ m/^diff /) if DEBUG;
5183                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5184                 $patch_number++;
5185                 # print "git diff" header
5186                 print format_git_diff_header_line($patch_line, $diffinfo,
5187                                                   \%from, \%to);
5188
5189                 # print extended diff header
5190                 print "<div class=\"diff extended_header\">\n";
5191         EXTENDED_HEADER:
5192                 while ($patch_line = <$fd>) {
5193                         chomp $patch_line;
5194
5195                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5196
5197                         print format_extended_diff_header_line($patch_line, $diffinfo,
5198                                                                \%from, \%to);
5199                 }
5200                 print "</div>\n"; # class="diff extended_header"
5201
5202                 # from-file/to-file diff header
5203                 if (! $patch_line) {
5204                         print "</div>\n"; # class="patch"
5205                         last PATCH;
5206                 }
5207                 next PATCH if ($patch_line =~ m/^diff /);
5208                 #assert($patch_line =~ m/^---/) if DEBUG;
5209
5210                 my $last_patch_line = $patch_line;
5211                 $patch_line = <$fd>;
5212                 chomp $patch_line;
5213                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5214
5215                 print format_diff_from_to_header($last_patch_line, $patch_line,
5216                                                  $diffinfo, \%from, \%to,
5217                                                  @hash_parents);
5218
5219                 # the patch itself
5220         LINE:
5221                 while ($patch_line = <$fd>) {
5222                         chomp $patch_line;
5223
5224                         next PATCH if ($patch_line =~ m/^diff /);
5225
5226                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5227                         my $diff_classes = "diff";
5228                         $diff_classes .= " $class" if ($class);
5229                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5230
5231                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5232                                 if ($class eq 'chunk_header') {
5233                                         print_sidebyside_diff_chunk(@chunk);
5234                                         @chunk = ( [ $class, $line ] );
5235                                 } else {
5236                                         push @chunk, [ $class, $line ];
5237                                 }
5238                         } else {
5239                                 # default 'inline' style and unknown styles
5240                                 print $line;
5241                         }
5242                 }
5243
5244         } continue {
5245                 if (@chunk) {
5246                         print_sidebyside_diff_chunk(@chunk);
5247                         @chunk = ();
5248                 }
5249                 print "</div>\n"; # class="patch"
5250         }
5251
5252         # for compact combined (--cc) format, with chunk and patch simplification
5253         # the patchset might be empty, but there might be unprocessed raw lines
5254         for (++$patch_idx if $patch_number > 0;
5255              $patch_idx < @$difftree;
5256              ++$patch_idx) {
5257                 # read and prepare patch information
5258                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5259
5260                 # generate anchor for "patch" links in difftree / whatchanged part
5261                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5262                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5263                       "</div>\n";  # class="patch"
5264
5265                 $patch_number++;
5266         }
5267
5268         if ($patch_number == 0) {
5269                 if (@hash_parents > 1) {
5270                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5271                 } else {
5272                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5273                 }
5274         }
5275
5276         print "</div>\n"; # class="patchset"
5277 }
5278
5279 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5280
5281 sub git_project_search_form {
5282         my ($searchtext, $search_use_regexp) = @_;
5283
5284         my $limit = '';
5285         if ($project_filter) {
5286                 $limit = " in '$project_filter/'";
5287         }
5288
5289         print "<div class=\"projsearch\">\n";
5290         print $cgi->startform(-method => 'get', -action => $my_uri) .
5291               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5292         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5293                 if (defined $project_filter);
5294         print $cgi->textfield(-name => 's', -value => $searchtext,
5295                               -title => "Search project by name and description$limit",
5296                               -size => 60) . "\n" .
5297               "<span title=\"Extended regular expression\">" .
5298               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5299                              -checked => $search_use_regexp) .
5300               "</span>\n" .
5301               $cgi->submit(-name => 'btnS', -value => 'Search') .
5302               $cgi->end_form() . "\n" .
5303               $cgi->a({-href => href(project => undef, searchtext => undef,
5304                                      project_filter => $project_filter)},
5305                       esc_html("List all projects$limit")) . "<br />\n";
5306         print "</div>\n";
5307 }
5308
5309 # entry for given @keys needs filling if at least one of keys in list
5310 # is not present in %$project_info
5311 sub project_info_needs_filling {
5312         my ($project_info, @keys) = @_;
5313
5314         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5315         foreach my $key (@keys) {
5316                 if (!exists $project_info->{$key}) {
5317                         return 1;
5318                 }
5319         }
5320         return;
5321 }
5322
5323 # fills project list info (age, description, owner, category, forks, etc.)
5324 # for each project in the list, removing invalid projects from
5325 # returned list, or fill only specified info.
5326 #
5327 # Invalid projects are removed from the returned list if and only if you
5328 # ask 'age' or 'age_string' to be filled, because they are the only fields
5329 # that run unconditionally git command that requires repository, and
5330 # therefore do always check if project repository is invalid.
5331 #
5332 # USAGE:
5333 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5334 #   ensures that 'descr_long' and 'ctags' fields are filled
5335 # * @project_list = fill_project_list_info(\@project_list)
5336 #   ensures that all fields are filled (and invalid projects removed)
5337 #
5338 # NOTE: modifies $projlist, but does not remove entries from it
5339 sub fill_project_list_info {
5340         my ($projlist, @wanted_keys) = @_;
5341         my @projects;
5342         my $filter_set = sub { return @_; };
5343         if (@wanted_keys) {
5344                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5345                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5346         }
5347
5348         my $show_ctags = gitweb_check_feature('ctags');
5349  PROJECT:
5350         foreach my $pr (@$projlist) {
5351                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5352                         my (@activity) = git_get_last_activity($pr->{'path'});
5353                         unless (@activity) {
5354                                 next PROJECT;
5355                         }
5356                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5357                 }
5358                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5359                         my $descr = git_get_project_description($pr->{'path'}) || "";
5360                         $descr = to_utf8($descr);
5361                         $pr->{'descr_long'} = $descr;
5362                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5363                 }
5364                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5365                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5366                 }
5367                 if ($show_ctags &&
5368                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5369                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5370                 }
5371                 if ($projects_list_group_categories &&
5372                     project_info_needs_filling($pr, $filter_set->('category'))) {
5373                         my $cat = git_get_project_category($pr->{'path'}) ||
5374                                                            $project_list_default_category;
5375                         $pr->{'category'} = to_utf8($cat);
5376                 }
5377
5378                 push @projects, $pr;
5379         }
5380
5381         return @projects;
5382 }
5383
5384 sub sort_projects_list {
5385         my ($projlist, $order) = @_;
5386         my @projects;
5387
5388         my %order_info = (
5389                 project => { key => 'path', type => 'str' },
5390                 descr => { key => 'descr_long', type => 'str' },
5391                 owner => { key => 'owner', type => 'str' },
5392                 age => { key => 'age', type => 'num' }
5393         );
5394         my $oi = $order_info{$order};
5395         return @$projlist unless defined $oi;
5396         if ($oi->{'type'} eq 'str') {
5397                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5398         } else {
5399                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5400         }
5401
5402         return @projects;
5403 }
5404
5405 # returns a hash of categories, containing the list of project
5406 # belonging to each category
5407 sub build_projlist_by_category {
5408         my ($projlist, $from, $to) = @_;
5409         my %categories;
5410
5411         $from = 0 unless defined $from;
5412         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5413
5414         for (my $i = $from; $i <= $to; $i++) {
5415                 my $pr = $projlist->[$i];
5416                 push @{$categories{ $pr->{'category'} }}, $pr;
5417         }
5418
5419         return wantarray ? %categories : \%categories;
5420 }
5421
5422 # print 'sort by' <th> element, generating 'sort by $name' replay link
5423 # if that order is not selected
5424 sub print_sort_th {
5425         print format_sort_th(@_);
5426 }
5427
5428 sub format_sort_th {
5429         my ($name, $order, $header) = @_;
5430         my $sort_th = "";
5431         $header ||= ucfirst($name);
5432
5433         if ($order eq $name) {
5434                 $sort_th .= "<th>$header</th>\n";
5435         } else {
5436                 $sort_th .= "<th>" .
5437                             $cgi->a({-href => href(-replay=>1, order=>$name),
5438                                      -class => "header"}, $header) .
5439                             "</th>\n";
5440         }
5441
5442         return $sort_th;
5443 }
5444
5445 sub git_project_list_rows {
5446         my ($projlist, $from, $to, $check_forks) = @_;
5447
5448         $from = 0 unless defined $from;
5449         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5450
5451         my $alternate = 1;
5452         for (my $i = $from; $i <= $to; $i++) {
5453                 my $pr = $projlist->[$i];
5454
5455                 if ($alternate) {
5456                         print "<tr class=\"dark\">\n";
5457                 } else {
5458                         print "<tr class=\"light\">\n";
5459                 }
5460                 $alternate ^= 1;
5461
5462                 if ($check_forks) {
5463                         print "<td>";
5464                         if ($pr->{'forks'}) {
5465                                 my $nforks = scalar @{$pr->{'forks'}};
5466                                 if ($nforks > 0) {
5467                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5468                                                        -title => "$nforks forks"}, "+");
5469                                 } else {
5470                                         print $cgi->span({-title => "$nforks forks"}, "+");
5471                                 }
5472                         }
5473                         print "</td>\n";
5474                 }
5475                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5476                                         -class => "list"},
5477                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5478                       "</td>\n" .
5479                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5480                                         -class => "list",
5481                                         -title => $pr->{'descr_long'}},
5482                                         $search_regexp
5483                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5484                                                                     $pr->{'descr'}, $search_regexp)
5485                                         : esc_html($pr->{'descr'})) .
5486                       "</td>\n" .
5487                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5488                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5489                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5490                       "<td class=\"link\">" .
5491                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5492                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5493                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5494                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5495                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5496                       "</td>\n" .
5497                       "</tr>\n";
5498         }
5499 }
5500
5501 sub git_project_list_body {
5502         # actually uses global variable $project
5503         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5504         my @projects = @$projlist;
5505
5506         my $check_forks = gitweb_check_feature('forks');
5507         my $show_ctags  = gitweb_check_feature('ctags');
5508         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5509         $check_forks = undef
5510                 if ($tagfilter || $search_regexp);
5511
5512         # filtering out forks before filling info allows to do less work
5513         @projects = filter_forks_from_projects_list(\@projects)
5514                 if ($check_forks);
5515         # search_projects_list pre-fills required info
5516         @projects = search_projects_list(\@projects,
5517                                          'search_regexp' => $search_regexp,
5518                                          'tagfilter'  => $tagfilter)
5519                 if ($tagfilter || $search_regexp);
5520         # fill the rest
5521         @projects = fill_project_list_info(\@projects);
5522
5523         $order ||= $default_projects_order;
5524         $from = 0 unless defined $from;
5525         $to = $#projects if (!defined $to || $#projects < $to);
5526
5527         # short circuit
5528         if ($from > $to) {
5529                 print "<center>\n".
5530                       "<b>No such projects found</b><br />\n".
5531                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5532                       "</center>\n<br />\n";
5533                 return;
5534         }
5535
5536         @projects = sort_projects_list(\@projects, $order);
5537
5538         if ($show_ctags) {
5539                 my $ctags = git_gather_all_ctags(\@projects);
5540                 my $cloud = git_populate_project_tagcloud($ctags);
5541                 print git_show_project_tagcloud($cloud, 64);
5542         }
5543
5544         print "<table class=\"project_list\">\n";
5545         unless ($no_header) {
5546                 print "<tr>\n";
5547                 if ($check_forks) {
5548                         print "<th></th>\n";
5549                 }
5550                 print_sort_th('project', $order, 'Project');
5551                 print_sort_th('descr', $order, 'Description');
5552                 print_sort_th('owner', $order, 'Owner');
5553                 print_sort_th('age', $order, 'Last Change');
5554                 print "<th></th>\n" . # for links
5555                       "</tr>\n";
5556         }
5557
5558         if ($projects_list_group_categories) {
5559                 # only display categories with projects in the $from-$to window
5560                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5561                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5562                 foreach my $cat (sort keys %categories) {
5563                         unless ($cat eq "") {
5564                                 print "<tr>\n";
5565                                 if ($check_forks) {
5566                                         print "<td></td>\n";
5567                                 }
5568                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5569                                 print "</tr>\n";
5570                         }
5571
5572                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5573                 }
5574         } else {
5575                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5576         }
5577
5578         if (defined $extra) {
5579                 print "<tr>\n";
5580                 if ($check_forks) {
5581                         print "<td></td>\n";
5582                 }
5583                 print "<td colspan=\"5\">$extra</td>\n" .
5584                       "</tr>\n";
5585         }
5586         print "</table>\n";
5587 }
5588
5589 sub git_log_body {
5590         # uses global variable $project
5591         my ($commitlist, $from, $to, $refs, $extra) = @_;
5592
5593         $from = 0 unless defined $from;
5594         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5595
5596         for (my $i = 0; $i <= $to; $i++) {
5597                 my %co = %{$commitlist->[$i]};
5598                 next if !%co;
5599                 my $commit = $co{'id'};
5600                 my $ref = format_ref_marker($refs, $commit);
5601                 git_print_header_div('commit',
5602                                "<span class=\"age\">$co{'age_string'}</span>" .
5603                                esc_html($co{'title'}) . $ref,
5604                                $commit);
5605                 print "<div class=\"title_text\">\n" .
5606                       "<div class=\"log_link\">\n" .
5607                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5608                       " | " .
5609                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5610                       " | " .
5611                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5612                       "<br/>\n" .
5613                       "</div>\n";
5614                       git_print_authorship(\%co, -tag => 'span');
5615                       print "<br/>\n</div>\n";
5616
5617                 print "<div class=\"log_body\">\n";
5618                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5619                 print "</div>\n";
5620         }
5621         if ($extra) {
5622                 print "<div class=\"page_nav\">\n";
5623                 print "$extra\n";
5624                 print "</div>\n";
5625         }
5626 }
5627
5628 sub git_shortlog_body {
5629         # uses global variable $project
5630         my ($commitlist, $from, $to, $refs, $extra) = @_;
5631
5632         $from = 0 unless defined $from;
5633         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5634
5635         print "<table class=\"shortlog\">\n";
5636         my $alternate = 1;
5637         for (my $i = $from; $i <= $to; $i++) {
5638                 my %co = %{$commitlist->[$i]};
5639                 my $commit = $co{'id'};
5640                 my $ref = format_ref_marker($refs, $commit);
5641                 if ($alternate) {
5642                         print "<tr class=\"dark\">\n";
5643                 } else {
5644                         print "<tr class=\"light\">\n";
5645                 }
5646                 $alternate ^= 1;
5647                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5648                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5649                       format_author_html('td', \%co, 10) . "<td>";
5650                 print format_subject_html($co{'title'}, $co{'title_short'},
5651                                           href(action=>"commit", hash=>$commit), $ref);
5652                 print "</td>\n" .
5653                       "<td class=\"link\">" .
5654                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5655                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5656                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5657                 my $snapshot_links = format_snapshot_links($commit);
5658                 if (defined $snapshot_links) {
5659                         print " | " . $snapshot_links;
5660                 }
5661                 print "</td>\n" .
5662                       "</tr>\n";
5663         }
5664         if (defined $extra) {
5665                 print "<tr>\n" .
5666                       "<td colspan=\"4\">$extra</td>\n" .
5667                       "</tr>\n";
5668         }
5669         print "</table>\n";
5670 }
5671
5672 sub git_history_body {
5673         # Warning: assumes constant type (blob or tree) during history
5674         my ($commitlist, $from, $to, $refs, $extra,
5675             $file_name, $file_hash, $ftype) = @_;
5676
5677         $from = 0 unless defined $from;
5678         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5679
5680         print "<table class=\"history\">\n";
5681         my $alternate = 1;
5682         for (my $i = $from; $i <= $to; $i++) {
5683                 my %co = %{$commitlist->[$i]};
5684                 if (!%co) {
5685                         next;
5686                 }
5687                 my $commit = $co{'id'};
5688
5689                 my $ref = format_ref_marker($refs, $commit);
5690
5691                 if ($alternate) {
5692                         print "<tr class=\"dark\">\n";
5693                 } else {
5694                         print "<tr class=\"light\">\n";
5695                 }
5696                 $alternate ^= 1;
5697                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5698         # shortlog:   format_author_html('td', \%co, 10)
5699                       format_author_html('td', \%co, 15, 3) . "<td>";
5700                 # originally git_history used chop_str($co{'title'}, 50)
5701                 print format_subject_html($co{'title'}, $co{'title_short'},
5702                                           href(action=>"commit", hash=>$commit), $ref);
5703                 print "</td>\n" .
5704                       "<td class=\"link\">" .
5705                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5706                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5707
5708                 if ($ftype eq 'blob') {
5709                         my $blob_current = $file_hash;
5710                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5711                         if (defined $blob_current && defined $blob_parent &&
5712                                         $blob_current ne $blob_parent) {
5713                                 print " | " .
5714                                         $cgi->a({-href => href(action=>"blobdiff",
5715                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5716                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5717                                                                file_name=>$file_name)},
5718                                                 "diff to current");
5719                         }
5720                 }
5721                 print "</td>\n" .
5722                       "</tr>\n";
5723         }
5724         if (defined $extra) {
5725                 print "<tr>\n" .
5726                       "<td colspan=\"4\">$extra</td>\n" .
5727                       "</tr>\n";
5728         }
5729         print "</table>\n";
5730 }
5731
5732 sub git_tags_body {
5733         # uses global variable $project
5734         my ($taglist, $from, $to, $extra) = @_;
5735         $from = 0 unless defined $from;
5736         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5737
5738         print "<table class=\"tags\">\n";
5739         my $alternate = 1;
5740         for (my $i = $from; $i <= $to; $i++) {
5741                 my $entry = $taglist->[$i];
5742                 my %tag = %$entry;
5743                 my $comment = $tag{'subject'};
5744                 my $comment_short;
5745                 if (defined $comment) {
5746                         $comment_short = chop_str($comment, 30, 5);
5747                 }
5748                 if ($alternate) {
5749                         print "<tr class=\"dark\">\n";
5750                 } else {
5751                         print "<tr class=\"light\">\n";
5752                 }
5753                 $alternate ^= 1;
5754                 if (defined $tag{'age'}) {
5755                         print "<td><i>$tag{'age'}</i></td>\n";
5756                 } else {
5757                         print "<td></td>\n";
5758                 }
5759                 print "<td>" .
5760                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5761                                -class => "list name"}, esc_html($tag{'name'})) .
5762                       "</td>\n" .
5763                       "<td>";
5764                 if (defined $comment) {
5765                         print format_subject_html($comment, $comment_short,
5766                                                   href(action=>"tag", hash=>$tag{'id'}));
5767                 }
5768                 print "</td>\n" .
5769                       "<td class=\"selflink\">";
5770                 if ($tag{'type'} eq "tag") {
5771                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5772                 } else {
5773                         print "&nbsp;";
5774                 }
5775                 print "</td>\n" .
5776                       "<td class=\"link\">" . " | " .
5777                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5778                 if ($tag{'reftype'} eq "commit") {
5779                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5780                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5781                 } elsif ($tag{'reftype'} eq "blob") {
5782                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5783                 }
5784                 print "</td>\n" .
5785                       "</tr>";
5786         }
5787         if (defined $extra) {
5788                 print "<tr>\n" .
5789                       "<td colspan=\"5\">$extra</td>\n" .
5790                       "</tr>\n";
5791         }
5792         print "</table>\n";
5793 }
5794
5795 sub git_heads_body {
5796         # uses global variable $project
5797         my ($headlist, $head_at, $from, $to, $extra) = @_;
5798         $from = 0 unless defined $from;
5799         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5800
5801         print "<table class=\"heads\">\n";
5802         my $alternate = 1;
5803         for (my $i = $from; $i <= $to; $i++) {
5804                 my $entry = $headlist->[$i];
5805                 my %ref = %$entry;
5806                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5807                 if ($alternate) {
5808                         print "<tr class=\"dark\">\n";
5809                 } else {
5810                         print "<tr class=\"light\">\n";
5811                 }
5812                 $alternate ^= 1;
5813                 print "<td><i>$ref{'age'}</i></td>\n" .
5814                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5815                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5816                                -class => "list name"},esc_html($ref{'name'})) .
5817                       "</td>\n" .
5818                       "<td class=\"link\">" .
5819                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5820                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5821                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5822                       "</td>\n" .
5823                       "</tr>";
5824         }
5825         if (defined $extra) {
5826                 print "<tr>\n" .
5827                       "<td colspan=\"3\">$extra</td>\n" .
5828                       "</tr>\n";
5829         }
5830         print "</table>\n";
5831 }
5832
5833 # Display a single remote block
5834 sub git_remote_block {
5835         my ($remote, $rdata, $limit, $head) = @_;
5836
5837         my $heads = $rdata->{'heads'};
5838         my $fetch = $rdata->{'fetch'};
5839         my $push = $rdata->{'push'};
5840
5841         my $urls_table = "<table class=\"projects_list\">\n" ;
5842
5843         if (defined $fetch) {
5844                 if ($fetch eq $push) {
5845                         $urls_table .= format_repo_url("URL", $fetch);
5846                 } else {
5847                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5848                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5849                 }
5850         } elsif (defined $push) {
5851                 $urls_table .= format_repo_url("Push URL", $push);
5852         } else {
5853                 $urls_table .= format_repo_url("", "No remote URL");
5854         }
5855
5856         $urls_table .= "</table>\n";
5857
5858         my $dots;
5859         if (defined $limit && $limit < @$heads) {
5860                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5861         }
5862
5863         print $urls_table;
5864         git_heads_body($heads, $head, 0, $limit, $dots);
5865 }
5866
5867 # Display a list of remote names with the respective fetch and push URLs
5868 sub git_remotes_list {
5869         my ($remotedata, $limit) = @_;
5870         print "<table class=\"heads\">\n";
5871         my $alternate = 1;
5872         my @remotes = sort keys %$remotedata;
5873
5874         my $limited = $limit && $limit < @remotes;
5875
5876         $#remotes = $limit - 1 if $limited;
5877
5878         while (my $remote = shift @remotes) {
5879                 my $rdata = $remotedata->{$remote};
5880                 my $fetch = $rdata->{'fetch'};
5881                 my $push = $rdata->{'push'};
5882                 if ($alternate) {
5883                         print "<tr class=\"dark\">\n";
5884                 } else {
5885                         print "<tr class=\"light\">\n";
5886                 }
5887                 $alternate ^= 1;
5888                 print "<td>" .
5889                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5890                                -class=> "list name"},esc_html($remote)) .
5891                       "</td>";
5892                 print "<td class=\"link\">" .
5893                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5894                       " | " .
5895                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5896                       "</td>";
5897
5898                 print "</tr>\n";
5899         }
5900
5901         if ($limited) {
5902                 print "<tr>\n" .
5903                       "<td colspan=\"3\">" .
5904                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5905                       "</td>\n" . "</tr>\n";
5906         }
5907
5908         print "</table>";
5909 }
5910
5911 # Display remote heads grouped by remote, unless there are too many
5912 # remotes, in which case we only display the remote names
5913 sub git_remotes_body {
5914         my ($remotedata, $limit, $head) = @_;
5915         if ($limit and $limit < keys %$remotedata) {
5916                 git_remotes_list($remotedata, $limit);
5917         } else {
5918                 fill_remote_heads($remotedata);
5919                 while (my ($remote, $rdata) = each %$remotedata) {
5920                         git_print_section({-class=>"remote", -id=>$remote},
5921                                 ["remotes", $remote, $remote], sub {
5922                                         git_remote_block($remote, $rdata, $limit, $head);
5923                                 });
5924                 }
5925         }
5926 }
5927
5928 sub git_search_message {
5929         my %co = @_;
5930
5931         my $greptype;
5932         if ($searchtype eq 'commit') {
5933                 $greptype = "--grep=";
5934         } elsif ($searchtype eq 'author') {
5935                 $greptype = "--author=";
5936         } elsif ($searchtype eq 'committer') {
5937                 $greptype = "--committer=";
5938         }
5939         $greptype .= $searchtext;
5940         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5941                                        $greptype, '--regexp-ignore-case',
5942                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5943
5944         my $paging_nav = '';
5945         if ($page > 0) {
5946                 $paging_nav .=
5947                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5948                                 "first") .
5949                         " &sdot; " .
5950                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5951                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5952         } else {
5953                 $paging_nav .= "first &sdot; prev";
5954         }
5955         my $next_link = '';
5956         if ($#commitlist >= 100) {
5957                 $next_link =
5958                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5959                                  -accesskey => "n", -title => "Alt-n"}, "next");
5960                 $paging_nav .= " &sdot; $next_link";
5961         } else {
5962                 $paging_nav .= " &sdot; next";
5963         }
5964
5965         git_header_html();
5966
5967         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5968         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5969         if ($page == 0 && !@commitlist) {
5970                 print "<p>No match.</p>\n";
5971         } else {
5972                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5973         }
5974
5975         git_footer_html();
5976 }
5977
5978 sub git_search_changes {
5979         my %co = @_;
5980
5981         local $/ = "\n";
5982         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5983                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5984                 ($search_use_regexp ? '--pickaxe-regex' : ())
5985                         or die_error(500, "Open git-log failed");
5986
5987         git_header_html();
5988
5989         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5990         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5991
5992         print "<table class=\"pickaxe search\">\n";
5993         my $alternate = 1;
5994         undef %co;
5995         my @files;
5996         while (my $line = <$fd>) {
5997                 chomp $line;
5998                 next unless $line;
5999
6000                 my %set = parse_difftree_raw_line($line);
6001                 if (defined $set{'commit'}) {
6002                         # finish previous commit
6003                         if (%co) {
6004                                 print "</td>\n" .
6005                                       "<td class=\"link\">" .
6006                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6007                                               "commit") .
6008                                       " | " .
6009                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6010                                                              hash_base=>$co{'id'})},
6011                                               "tree") .
6012                                       "</td>\n" .
6013                                       "</tr>\n";
6014                         }
6015
6016                         if ($alternate) {
6017                                 print "<tr class=\"dark\">\n";
6018                         } else {
6019                                 print "<tr class=\"light\">\n";
6020                         }
6021                         $alternate ^= 1;
6022                         %co = parse_commit($set{'commit'});
6023                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6024                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6025                               "<td><i>$author</i></td>\n" .
6026                               "<td>" .
6027                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6028                                       -class => "list subject"},
6029                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6030                 } elsif (defined $set{'to_id'}) {
6031                         next if ($set{'to_id'} =~ m/^0{40}$/);
6032
6033                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6034                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6035                                       -class => "list"},
6036                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6037                               "<br/>\n";
6038                 }
6039         }
6040         close $fd;
6041
6042         # finish last commit (warning: repetition!)
6043         if (%co) {
6044                 print "</td>\n" .
6045                       "<td class=\"link\">" .
6046                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6047                               "commit") .
6048                       " | " .
6049                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6050                                              hash_base=>$co{'id'})},
6051                               "tree") .
6052                       "</td>\n" .
6053                       "</tr>\n";
6054         }
6055
6056         print "</table>\n";
6057
6058         git_footer_html();
6059 }
6060
6061 sub git_search_files {
6062         my %co = @_;
6063
6064         local $/ = "\n";
6065         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6066                 $search_use_regexp ? ('-E', '-i') : '-F',
6067                 $searchtext, $co{'tree'}
6068                         or die_error(500, "Open git-grep failed");
6069
6070         git_header_html();
6071
6072         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6073         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6074
6075         print "<table class=\"grep_search\">\n";
6076         my $alternate = 1;
6077         my $matches = 0;
6078         my $lastfile = '';
6079         my $file_href;
6080         while (my $line = <$fd>) {
6081                 chomp $line;
6082                 my ($file, $lno, $ltext, $binary);
6083                 last if ($matches++ > 1000);
6084                 if ($line =~ /^Binary file (.+) matches$/) {
6085                         $file = $1;
6086                         $binary = 1;
6087                 } else {
6088                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6089                         $file =~ s/^$co{'tree'}://;
6090                 }
6091                 if ($file ne $lastfile) {
6092                         $lastfile and print "</td></tr>\n";
6093                         if ($alternate++) {
6094                                 print "<tr class=\"dark\">\n";
6095                         } else {
6096                                 print "<tr class=\"light\">\n";
6097                         }
6098                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6099                                           file_name=>$file);
6100                         print "<td class=\"list\">".
6101                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6102                         print "</td><td>\n";
6103                         $lastfile = $file;
6104                 }
6105                 if ($binary) {
6106                         print "<div class=\"binary\">Binary file</div>\n";
6107                 } else {
6108                         $ltext = untabify($ltext);
6109                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6110                                 $ltext = esc_html($1, -nbsp=>1);
6111                                 $ltext .= '<span class="match">';
6112                                 $ltext .= esc_html($2, -nbsp=>1);
6113                                 $ltext .= '</span>';
6114                                 $ltext .= esc_html($3, -nbsp=>1);
6115                         } else {
6116                                 $ltext = esc_html($ltext, -nbsp=>1);
6117                         }
6118                         print "<div class=\"pre\">" .
6119                                 $cgi->a({-href => $file_href.'#l'.$lno,
6120                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6121                                 ' ' .  $ltext . "</div>\n";
6122                 }
6123         }
6124         if ($lastfile) {
6125                 print "</td></tr>\n";
6126                 if ($matches > 1000) {
6127                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6128                 }
6129         } else {
6130                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6131         }
6132         close $fd;
6133
6134         print "</table>\n";
6135
6136         git_footer_html();
6137 }
6138
6139 sub git_search_grep_body {
6140         my ($commitlist, $from, $to, $extra) = @_;
6141         $from = 0 unless defined $from;
6142         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6143
6144         print "<table class=\"commit_search\">\n";
6145         my $alternate = 1;
6146         for (my $i = $from; $i <= $to; $i++) {
6147                 my %co = %{$commitlist->[$i]};
6148                 if (!%co) {
6149                         next;
6150                 }
6151                 my $commit = $co{'id'};
6152                 if ($alternate) {
6153                         print "<tr class=\"dark\">\n";
6154                 } else {
6155                         print "<tr class=\"light\">\n";
6156                 }
6157                 $alternate ^= 1;
6158                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6159                       format_author_html('td', \%co, 15, 5) .
6160                       "<td>" .
6161                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6162                                -class => "list subject"},
6163                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6164                 my $comment = $co{'comment'};
6165                 foreach my $line (@$comment) {
6166                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6167                                 my ($lead, $match, $trail) = ($1, $2, $3);
6168                                 $match = chop_str($match, 70, 5, 'center');
6169                                 my $contextlen = int((80 - length($match))/2);
6170                                 $contextlen = 30 if ($contextlen > 30);
6171                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6172                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6173
6174                                 $lead  = esc_html($lead);
6175                                 $match = esc_html($match);
6176                                 $trail = esc_html($trail);
6177
6178                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6179                         }
6180                 }
6181                 print "</td>\n" .
6182                       "<td class=\"link\">" .
6183                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6184                       " | " .
6185                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6186                       " | " .
6187                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6188                 print "</td>\n" .
6189                       "</tr>\n";
6190         }
6191         if (defined $extra) {
6192                 print "<tr>\n" .
6193                       "<td colspan=\"3\">$extra</td>\n" .
6194                       "</tr>\n";
6195         }
6196         print "</table>\n";
6197 }
6198
6199 ## ======================================================================
6200 ## ======================================================================
6201 ## actions
6202
6203 sub git_project_list {
6204         my $order = $input_params{'order'};
6205         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6206                 die_error(400, "Unknown order parameter");
6207         }
6208
6209         my @list = git_get_projects_list($project_filter, $strict_export);
6210         if (!@list) {
6211                 die_error(404, "No projects found");
6212         }
6213
6214         git_header_html();
6215         if (defined $home_text && -f $home_text) {
6216                 print "<div class=\"index_include\">\n";
6217                 insert_file($home_text);
6218                 print "</div>\n";
6219         }
6220
6221         git_project_search_form($searchtext, $search_use_regexp);
6222         git_project_list_body(\@list, $order);
6223         git_footer_html();
6224 }
6225
6226 sub git_forks {
6227         my $order = $input_params{'order'};
6228         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6229                 die_error(400, "Unknown order parameter");
6230         }
6231
6232         my $filter = $project;
6233         $filter =~ s/\.git$//;
6234         my @list = git_get_projects_list($filter);
6235         if (!@list) {
6236                 die_error(404, "No forks found");
6237         }
6238
6239         git_header_html();
6240         git_print_page_nav('','');
6241         git_print_header_div('summary', "$project forks");
6242         git_project_list_body(\@list, $order);
6243         git_footer_html();
6244 }
6245
6246 sub git_project_index {
6247         my @projects = git_get_projects_list($project_filter, $strict_export);
6248         if (!@projects) {
6249                 die_error(404, "No projects found");
6250         }
6251
6252         print $cgi->header(
6253                 -type => 'text/plain',
6254                 -charset => 'utf-8',
6255                 -content_disposition => 'inline; filename="index.aux"');
6256
6257         foreach my $pr (@projects) {
6258                 if (!exists $pr->{'owner'}) {
6259                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6260                 }
6261
6262                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6263                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6264                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6265                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6266                 $path  =~ s/ /\+/g;
6267                 $owner =~ s/ /\+/g;
6268
6269                 print "$path $owner\n";
6270         }
6271 }
6272
6273 sub git_summary {
6274         my $descr = git_get_project_description($project) || "none";
6275         my %co = parse_commit("HEAD");
6276         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6277         my $head = $co{'id'};
6278         my $remote_heads = gitweb_check_feature('remote_heads');
6279
6280         my $owner = git_get_project_owner($project);
6281
6282         my $refs = git_get_references();
6283         # These get_*_list functions return one more to allow us to see if
6284         # there are more ...
6285         my @taglist  = git_get_tags_list(16);
6286         my @headlist = git_get_heads_list(16);
6287         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6288         my @forklist;
6289         my $check_forks = gitweb_check_feature('forks');
6290
6291         if ($check_forks) {
6292                 # find forks of a project
6293                 my $filter = $project;
6294                 $filter =~ s/\.git$//;
6295                 @forklist = git_get_projects_list($filter);
6296                 # filter out forks of forks
6297                 @forklist = filter_forks_from_projects_list(\@forklist)
6298                         if (@forklist);
6299         }
6300
6301         git_header_html();
6302         git_print_page_nav('summary','', $head);
6303
6304         print "<div class=\"title\">&nbsp;</div>\n";
6305         print "<table class=\"projects_list\">\n" .
6306               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6307               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6308         if (defined $cd{'rfc2822'}) {
6309                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6310                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6311         }
6312
6313         # use per project git URL list in $projectroot/$project/cloneurl
6314         # or make project git URL from git base URL and project name
6315         my $url_tag = "URL";
6316         my @url_list = git_get_project_url_list($project);
6317         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6318         foreach my $git_url (@url_list) {
6319                 next unless $git_url;
6320                 print format_repo_url($url_tag, $git_url);
6321                 $url_tag = "";
6322         }
6323
6324         # Tag cloud
6325         my $show_ctags = gitweb_check_feature('ctags');
6326         if ($show_ctags) {
6327                 my $ctags = git_get_project_ctags($project);
6328                 if (%$ctags) {
6329                         # without ability to add tags, don't show if there are none
6330                         my $cloud = git_populate_project_tagcloud($ctags);
6331                         print "<tr id=\"metadata_ctags\">" .
6332                               "<td>content tags</td>" .
6333                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6334                               "</tr>\n";
6335                 }
6336         }
6337
6338         print "</table>\n";
6339
6340         # If XSS prevention is on, we don't include README.html.
6341         # TODO: Allow a readme in some safe format.
6342         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6343                 print "<div class=\"title\">readme</div>\n" .
6344                       "<div class=\"readme\">\n";
6345                 insert_file("$projectroot/$project/README.html");
6346                 print "\n</div>\n"; # class="readme"
6347         }
6348
6349         # we need to request one more than 16 (0..15) to check if
6350         # those 16 are all
6351         my @commitlist = $head ? parse_commits($head, 17) : ();
6352         if (@commitlist) {
6353                 git_print_header_div('shortlog');
6354                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6355                                   $#commitlist <=  15 ? undef :
6356                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6357         }
6358
6359         if (@taglist) {
6360                 git_print_header_div('tags');
6361                 git_tags_body(\@taglist, 0, 15,
6362                               $#taglist <=  15 ? undef :
6363                               $cgi->a({-href => href(action=>"tags")}, "..."));
6364         }
6365
6366         if (@headlist) {
6367                 git_print_header_div('heads');
6368                 git_heads_body(\@headlist, $head, 0, 15,
6369                                $#headlist <= 15 ? undef :
6370                                $cgi->a({-href => href(action=>"heads")}, "..."));
6371         }
6372
6373         if (%remotedata) {
6374                 git_print_header_div('remotes');
6375                 git_remotes_body(\%remotedata, 15, $head);
6376         }
6377
6378         if (@forklist) {
6379                 git_print_header_div('forks');
6380                 git_project_list_body(\@forklist, 'age', 0, 15,
6381                                       $#forklist <= 15 ? undef :
6382                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6383                                       'no_header');
6384         }
6385
6386         git_footer_html();
6387 }
6388
6389 sub git_tag {
6390         my %tag = parse_tag($hash);
6391
6392         if (! %tag) {
6393                 die_error(404, "Unknown tag object");
6394         }
6395
6396         my $head = git_get_head_hash($project);
6397         git_header_html();
6398         git_print_page_nav('','', $head,undef,$head);
6399         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6400         print "<div class=\"title_text\">\n" .
6401               "<table class=\"object_header\">\n" .
6402               "<tr>\n" .
6403               "<td>object</td>\n" .
6404               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6405                                $tag{'object'}) . "</td>\n" .
6406               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6407                                               $tag{'type'}) . "</td>\n" .
6408               "</tr>\n";
6409         if (defined($tag{'author'})) {
6410                 git_print_authorship_rows(\%tag, 'author');
6411         }
6412         print "</table>\n\n" .
6413               "</div>\n";
6414         print "<div class=\"page_body\">";
6415         my $comment = $tag{'comment'};
6416         foreach my $line (@$comment) {
6417                 chomp $line;
6418                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6419         }
6420         print "</div>\n";
6421         git_footer_html();
6422 }
6423
6424 sub git_blame_common {
6425         my $format = shift || 'porcelain';
6426         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6427                 $format = 'incremental';
6428                 $action = 'blame_incremental'; # for page title etc
6429         }
6430
6431         # permissions
6432         gitweb_check_feature('blame')
6433                 or die_error(403, "Blame view not allowed");
6434
6435         # error checking
6436         die_error(400, "No file name given") unless $file_name;
6437         $hash_base ||= git_get_head_hash($project);
6438         die_error(404, "Couldn't find base commit") unless $hash_base;
6439         my %co = parse_commit($hash_base)
6440                 or die_error(404, "Commit not found");
6441         my $ftype = "blob";
6442         if (!defined $hash) {
6443                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6444                         or die_error(404, "Error looking up file");
6445         } else {
6446                 $ftype = git_get_type($hash);
6447                 if ($ftype !~ "blob") {
6448                         die_error(400, "Object is not a blob");
6449                 }
6450         }
6451
6452         my $fd;
6453         if ($format eq 'incremental') {
6454                 # get file contents (as base)
6455                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6456                         or die_error(500, "Open git-cat-file failed");
6457         } elsif ($format eq 'data') {
6458                 # run git-blame --incremental
6459                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6460                         $hash_base, "--", $file_name
6461                         or die_error(500, "Open git-blame --incremental failed");
6462         } else {
6463                 # run git-blame --porcelain
6464                 open $fd, "-|", git_cmd(), "blame", '-p',
6465                         $hash_base, '--', $file_name
6466                         or die_error(500, "Open git-blame --porcelain failed");
6467         }
6468
6469         # incremental blame data returns early
6470         if ($format eq 'data') {
6471                 print $cgi->header(
6472                         -type=>"text/plain", -charset => "utf-8",
6473                         -status=> "200 OK");
6474                 local $| = 1; # output autoflush
6475                 while (my $line = <$fd>) {
6476                         print to_utf8($line);
6477                 }
6478                 close $fd
6479                         or print "ERROR $!\n";
6480
6481                 print 'END';
6482                 if (defined $t0 && gitweb_check_feature('timed')) {
6483                         print ' '.
6484                               tv_interval($t0, [ gettimeofday() ]).
6485                               ' '.$number_of_git_cmds;
6486                 }
6487                 print "\n";
6488
6489                 return;
6490         }
6491
6492         # page header
6493         git_header_html();
6494         my $formats_nav =
6495                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6496                         "blob") .
6497                 " | ";
6498         if ($format eq 'incremental') {
6499                 $formats_nav .=
6500                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6501                                 "blame") . " (non-incremental)";
6502         } else {
6503                 $formats_nav .=
6504                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6505                                 "blame") . " (incremental)";
6506         }
6507         $formats_nav .=
6508                 " | " .
6509                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6510                         "history") .
6511                 " | " .
6512                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6513                         "HEAD");
6514         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6515         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6516         git_print_page_path($file_name, $ftype, $hash_base);
6517
6518         # page body
6519         if ($format eq 'incremental') {
6520                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6521                       "This page requires JavaScript to run.\n Use ".
6522                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6523                               'this page').
6524                       " instead.\n".
6525                       "</b></center></div>\n</noscript>\n";
6526
6527                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6528         }
6529
6530         print qq!<div class="page_body">\n!;
6531         print qq!<div id="progress_info">... / ...</div>\n!
6532                 if ($format eq 'incremental');
6533         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6534               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6535               qq!<thead>\n!.
6536               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6537               qq!</thead>\n!.
6538               qq!<tbody>\n!;
6539
6540         my @rev_color = qw(light dark);
6541         my $num_colors = scalar(@rev_color);
6542         my $current_color = 0;
6543
6544         if ($format eq 'incremental') {
6545                 my $color_class = $rev_color[$current_color];
6546
6547                 #contents of a file
6548                 my $linenr = 0;
6549         LINE:
6550                 while (my $line = <$fd>) {
6551                         chomp $line;
6552                         $linenr++;
6553
6554                         print qq!<tr id="l$linenr" class="$color_class">!.
6555                               qq!<td class="sha1"><a href=""> </a></td>!.
6556                               qq!<td class="linenr">!.
6557                               qq!<a class="linenr" href="">$linenr</a></td>!;
6558                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6559                         print qq!</tr>\n!;
6560                 }
6561
6562         } else { # porcelain, i.e. ordinary blame
6563                 my %metainfo = (); # saves information about commits
6564
6565                 # blame data
6566         LINE:
6567                 while (my $line = <$fd>) {
6568                         chomp $line;
6569                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6570                         # no <lines in group> for subsequent lines in group of lines
6571                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6572                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6573                         if (!exists $metainfo{$full_rev}) {
6574                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6575                         }
6576                         my $meta = $metainfo{$full_rev};
6577                         my $data;
6578                         while ($data = <$fd>) {
6579                                 chomp $data;
6580                                 last if ($data =~ s/^\t//); # contents of line
6581                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6582                                         $meta->{$1} = $2 unless exists $meta->{$1};
6583                                 }
6584                                 if ($data =~ /^previous /) {
6585                                         $meta->{'nprevious'}++;
6586                                 }
6587                         }
6588                         my $short_rev = substr($full_rev, 0, 8);
6589                         my $author = $meta->{'author'};
6590                         my %date =
6591                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6592                         my $date = $date{'iso-tz'};
6593                         if ($group_size) {
6594                                 $current_color = ($current_color + 1) % $num_colors;
6595                         }
6596                         my $tr_class = $rev_color[$current_color];
6597                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6598                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6599                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6600                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6601                         if ($group_size) {
6602                                 print "<td class=\"sha1\"";
6603                                 print " title=\"". esc_html($author) . ", $date\"";
6604                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6605                                 print ">";
6606                                 print $cgi->a({-href => href(action=>"commit",
6607                                                              hash=>$full_rev,
6608                                                              file_name=>$file_name)},
6609                                               esc_html($short_rev));
6610                                 if ($group_size >= 2) {
6611                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6612                                         if (@author_initials) {
6613                                                 print "<br />" .
6614                                                       esc_html(join('', @author_initials));
6615                                                 #           or join('.', ...)
6616                                         }
6617                                 }
6618                                 print "</td>\n";
6619                         }
6620                         # 'previous' <sha1 of parent commit> <filename at commit>
6621                         if (exists $meta->{'previous'} &&
6622                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6623                                 $meta->{'parent'} = $1;
6624                                 $meta->{'file_parent'} = unquote($2);
6625                         }
6626                         my $linenr_commit =
6627                                 exists($meta->{'parent'}) ?
6628                                 $meta->{'parent'} : $full_rev;
6629                         my $linenr_filename =
6630                                 exists($meta->{'file_parent'}) ?
6631                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6632                         my $blamed = href(action => 'blame',
6633                                           file_name => $linenr_filename,
6634                                           hash_base => $linenr_commit);
6635                         print "<td class=\"linenr\">";
6636                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6637                                         -class => "linenr" },
6638                                       esc_html($lineno));
6639                         print "</td>";
6640                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6641                         print "</tr>\n";
6642                 } # end while
6643
6644         }
6645
6646         # footer
6647         print "</tbody>\n".
6648               "</table>\n"; # class="blame"
6649         print "</div>\n";   # class="blame_body"
6650         close $fd
6651                 or print "Reading blob failed\n";
6652
6653         git_footer_html();
6654 }
6655
6656 sub git_blame {
6657         git_blame_common();
6658 }
6659
6660 sub git_blame_incremental {
6661         git_blame_common('incremental');
6662 }
6663
6664 sub git_blame_data {
6665         git_blame_common('data');
6666 }
6667
6668 sub git_tags {
6669         my $head = git_get_head_hash($project);
6670         git_header_html();
6671         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6672         git_print_header_div('summary', $project);
6673
6674         my @tagslist = git_get_tags_list();
6675         if (@tagslist) {
6676                 git_tags_body(\@tagslist);
6677         }
6678         git_footer_html();
6679 }
6680
6681 sub git_heads {
6682         my $head = git_get_head_hash($project);
6683         git_header_html();
6684         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6685         git_print_header_div('summary', $project);
6686
6687         my @headslist = git_get_heads_list();
6688         if (@headslist) {
6689                 git_heads_body(\@headslist, $head);
6690         }
6691         git_footer_html();
6692 }
6693
6694 # used both for single remote view and for list of all the remotes
6695 sub git_remotes {
6696         gitweb_check_feature('remote_heads')
6697                 or die_error(403, "Remote heads view is disabled");
6698
6699         my $head = git_get_head_hash($project);
6700         my $remote = $input_params{'hash'};
6701
6702         my $remotedata = git_get_remotes_list($remote);
6703         die_error(500, "Unable to get remote information") unless defined $remotedata;
6704
6705         unless (%$remotedata) {
6706                 die_error(404, defined $remote ?
6707                         "Remote $remote not found" :
6708                         "No remotes found");
6709         }
6710
6711         git_header_html(undef, undef, -action_extra => $remote);
6712         git_print_page_nav('', '',  $head, undef, $head,
6713                 format_ref_views($remote ? '' : 'remotes'));
6714
6715         fill_remote_heads($remotedata);
6716         if (defined $remote) {
6717                 git_print_header_div('remotes', "$remote remote for $project");
6718                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6719         } else {
6720                 git_print_header_div('summary', "$project remotes");
6721                 git_remotes_body($remotedata, undef, $head);
6722         }
6723
6724         git_footer_html();
6725 }
6726
6727 sub git_blob_plain {
6728         my $type = shift;
6729         my $expires;
6730
6731         if (!defined $hash) {
6732                 if (defined $file_name) {
6733                         my $base = $hash_base || git_get_head_hash($project);
6734                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6735                                 or die_error(404, "Cannot find file");
6736                 } else {
6737                         die_error(400, "No file name defined");
6738                 }
6739         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6740                 # blobs defined by non-textual hash id's can be cached
6741                 $expires = "+1d";
6742         }
6743
6744         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6745                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6746
6747         # content-type (can include charset)
6748         $type = blob_contenttype($fd, $file_name, $type);
6749
6750         # "save as" filename, even when no $file_name is given
6751         my $save_as = "$hash";
6752         if (defined $file_name) {
6753                 $save_as = $file_name;
6754         } elsif ($type =~ m/^text\//) {
6755                 $save_as .= '.txt';
6756         }
6757
6758         # With XSS prevention on, blobs of all types except a few known safe
6759         # ones are served with "Content-Disposition: attachment" to make sure
6760         # they don't run in our security domain.  For certain image types,
6761         # blob view writes an <img> tag referring to blob_plain view, and we
6762         # want to be sure not to break that by serving the image as an
6763         # attachment (though Firefox 3 doesn't seem to care).
6764         my $sandbox = $prevent_xss &&
6765                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6766
6767         # serve text/* as text/plain
6768         if ($prevent_xss &&
6769             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6770              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6771                 my $rest = $1;
6772                 $rest = defined $rest ? $rest : '';
6773                 $type = "text/plain$rest";
6774         }
6775
6776         print $cgi->header(
6777                 -type => $type,
6778                 -expires => $expires,
6779                 -content_disposition =>
6780                         ($sandbox ? 'attachment' : 'inline')
6781                         . '; filename="' . $save_as . '"');
6782         local $/ = undef;
6783         binmode STDOUT, ':raw';
6784         print <$fd>;
6785         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6786         close $fd;
6787 }
6788
6789 sub git_blob {
6790         my $expires;
6791
6792         if (!defined $hash) {
6793                 if (defined $file_name) {
6794                         my $base = $hash_base || git_get_head_hash($project);
6795                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6796                                 or die_error(404, "Cannot find file");
6797                 } else {
6798                         die_error(400, "No file name defined");
6799                 }
6800         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6801                 # blobs defined by non-textual hash id's can be cached
6802                 $expires = "+1d";
6803         }
6804
6805         my $have_blame = gitweb_check_feature('blame');
6806         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6807                 or die_error(500, "Couldn't cat $file_name, $hash");
6808         my $mimetype = blob_mimetype($fd, $file_name);
6809         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6810         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6811                 close $fd;
6812                 return git_blob_plain($mimetype);
6813         }
6814         # we can have blame only for text/* mimetype
6815         $have_blame &&= ($mimetype =~ m!^text/!);
6816
6817         my $highlight_js = gitweb_check_feature('syntaxhighlighter_js');
6818         if ($highlight_js) {
6819                 push @stylesheets, $highlight_js->{url} . '/styles/shCore'
6820                         . $highlight_js->{style} . '.css';
6821                 push @stylesheets, $highlight_js->{url} . '/styles/shTheme'
6822                         . $highlight_js->{theme} . '.css';
6823         }
6824
6825         my $highlight = gitweb_check_feature('highlight');
6826         if ($highlight_js && $highlight) {
6827                 die_error(500, 'The highlight and syntaxhighlighter_js are'
6828                         . 'mutually exclusive');
6829         }
6830         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6831         $fd = run_highlighter($fd, $highlight, $syntax)
6832                 if $syntax;
6833
6834         git_header_html(undef, $expires);
6835         my $formats_nav = '';
6836         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6837                 if (defined $file_name) {
6838                         if ($have_blame) {
6839                                 $formats_nav .=
6840                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6841                                                 "blame") .
6842                                         " | ";
6843                         }
6844                         $formats_nav .=
6845                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6846                                         "history") .
6847                                 " | " .
6848                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6849                                         "raw") .
6850                                 " | " .
6851                                 $cgi->a({-href => href(action=>"blob",
6852                                                        hash_base=>"HEAD", file_name=>$file_name)},
6853                                         "HEAD");
6854                 } else {
6855                         $formats_nav .=
6856                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6857                                         "raw");
6858                 }
6859                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6860                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6861         } else {
6862                 print "<div class=\"page_nav\">\n" .
6863                       "<br/><br/></div>\n" .
6864                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6865         }
6866         git_print_page_path($file_name, "blob", $hash_base);
6867         print "<div class=\"page_body\">\n";
6868         if ($mimetype =~ m!^image/!) {
6869                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6870                 if ($file_name) {
6871                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6872                 }
6873                 print qq! src="! .
6874                       href(action=>"blob_plain", hash=>$hash,
6875                            hash_base=>$hash_base, file_name=>$file_name) .
6876                       qq!" />\n!;
6877         } elsif ($highlight_js) {
6878                 my $ext = $file_name;
6879                 $ext =~ s/.*\.//;
6880                 print qq!<pre class="brush:!.$ext.qq!">!;
6881                 while (my $line = <$fd>) {
6882                         $line =~ s!&!\&#38;!g;
6883                         $line =~ s!<!\&#60;!g;
6884                         print $line;
6885                 }
6886                 print qq!</pre>!;
6887                 foreach my $name ('Core', 'Autoloader') {
6888                         print qq!<script src="!.$highlight_js->{url}
6889                                 .qq!/scripts/sh!.$name
6890                                 .qq!.js" type="text/javascript"></script>!;
6891                 }
6892                 print qq!<script type="text/javascript">!;
6893                 print qq!SyntaxHighlighter.defaults["pad-line-numbers"] = 3;!;
6894                 print qq!SyntaxHighlighter.defaults["toolbar"] = false;!;
6895                 # for XHTML compliance
6896                 print qq!SyntaxHighlighter.config["space"] = '&#160;';!;
6897                 print qq!SyntaxHighlighter.autoloader(!;
6898                 my $brush_prefix = $highlight_js->{url} . '/scripts/shBrush';
6899                 foreach my $language ('applescript AppleScript',
6900                                 'actionscript3 as3 AS3',
6901                                 'bash shell Bash',
6902                                 'clj Clojure',
6903                                 'coldfusion cf ColdFusion',
6904                                 'cpp c Cpp',
6905                                 'c# c-sharp csharp CSharp',
6906                                 'css Css',
6907                                 'delphi pascal Delphi',
6908                                 'diff patch pas Diff',
6909                                 'erl erlang Erlang',
6910                                 'groovy Groovy',
6911                                 'java Java',
6912                                 'jfx javafx JavaFX',
6913                                 'js jscript javascript JScript',
6914                                 'perl pl Perl',
6915                                 'php Php',
6916                                 'text plain Plain',
6917                                 'py python Python',
6918                                 'ruby rails ror rb Ruby',
6919                                 'scala Scala',
6920                                 'scm Scheme',
6921                                 'sql Sql',
6922                                 'vb vbnet Vb',
6923                                 'xml xhtml xslt html Xml') {
6924                         my $lang = $language;
6925                         $lang =~ s! (\S+)$! $brush_prefix$1!;
6926                         print "'".$lang.qq!.js',!;
6927                 }
6928                 print qq!''); SyntaxHighlighter.all();!
6929                         .qq!function scrollTo(number) {!
6930                         .qq!  var elements = document.getElementsByClassName(number);!
6931                         .qq!  if (elements.length == 0) setTimeout('scrollTo("' + number + '");', 50);!
6932                         .qq!  else {!
6933                         .qq!    window.scroll(0, elements[0].offsetTop);!
6934                         .qq!    window.scrollTo(0, elements[0].offsetTop);!
6935                         .qq!    elements[0].style.color = '#ff0000';!
6936                         .qq!  }!
6937                         .qq!}!
6938                         .qq!var lineRegex = /#l(\\d+)\$/;!
6939                         .qq!var lineNumber = lineRegex.exec(document.URL);!
6940                         .qq!if (lineNumber)!
6941                         .qq!  scrollTo('number' + lineNumber[1]);!
6942                         .qq!</script>!;
6943         } else {
6944                 my $nr;
6945                 while (my $line = <$fd>) {
6946                         chomp $line;
6947                         $nr++;
6948                         $line = untabify($line);
6949                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6950                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6951                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6952                 }
6953         }
6954         close $fd
6955                 or print "Reading blob failed.\n";
6956         print "</div>";
6957         git_footer_html();
6958 }
6959
6960 sub git_tree {
6961         if (!defined $hash_base) {
6962                 $hash_base = "HEAD";
6963         }
6964         if (!defined $hash) {
6965                 if (defined $file_name) {
6966                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6967                 } else {
6968                         $hash = $hash_base;
6969                 }
6970         }
6971         die_error(404, "No such tree") unless defined($hash);
6972
6973         my $show_sizes = gitweb_check_feature('show-sizes');
6974         my $have_blame = gitweb_check_feature('blame');
6975
6976         my @entries = ();
6977         {
6978                 local $/ = "\0";
6979                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6980                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6981                         or die_error(500, "Open git-ls-tree failed");
6982                 @entries = map { chomp; $_ } <$fd>;
6983                 close $fd
6984                         or die_error(404, "Reading tree failed");
6985         }
6986
6987         my $refs = git_get_references();
6988         my $ref = format_ref_marker($refs, $hash_base);
6989         git_header_html();
6990         my $basedir = '';
6991         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6992                 my @views_nav = ();
6993                 if (defined $file_name) {
6994                         push @views_nav,
6995                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6996                                         "history"),
6997                                 $cgi->a({-href => href(action=>"tree",
6998                                                        hash_base=>"HEAD", file_name=>$file_name)},
6999                                         "HEAD"),
7000                 }
7001                 my $snapshot_links = format_snapshot_links($hash);
7002                 if (defined $snapshot_links) {
7003                         # FIXME: Should be available when we have no hash base as well.
7004                         push @views_nav, $snapshot_links;
7005                 }
7006                 git_print_page_nav('tree','', $hash_base, undef, undef,
7007                                    join(' | ', @views_nav));
7008                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7009         } else {
7010                 undef $hash_base;
7011                 print "<div class=\"page_nav\">\n";
7012                 print "<br/><br/></div>\n";
7013                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7014         }
7015         if (defined $file_name) {
7016                 $basedir = $file_name;
7017                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7018                         $basedir .= '/';
7019                 }
7020                 git_print_page_path($file_name, 'tree', $hash_base);
7021         }
7022         print "<div class=\"page_body\">\n";
7023         print "<table class=\"tree\">\n";
7024         my $alternate = 1;
7025         # '..' (top directory) link if possible
7026         if (defined $hash_base &&
7027             defined $file_name && $file_name =~ m![^/]+$!) {
7028                 if ($alternate) {
7029                         print "<tr class=\"dark\">\n";
7030                 } else {
7031                         print "<tr class=\"light\">\n";
7032                 }
7033                 $alternate ^= 1;
7034
7035                 my $up = $file_name;
7036                 $up =~ s!/?[^/]+$!!;
7037                 undef $up unless $up;
7038                 # based on git_print_tree_entry
7039                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7040                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7041                 print '<td class="list">';
7042                 print $cgi->a({-href => href(action=>"tree",
7043                                              hash_base=>$hash_base,
7044                                              file_name=>$up)},
7045                               "..");
7046                 print "</td>\n";
7047                 print "<td class=\"link\"></td>\n";
7048
7049                 print "</tr>\n";
7050         }
7051         foreach my $line (@entries) {
7052                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7053
7054                 if ($alternate) {
7055                         print "<tr class=\"dark\">\n";
7056                 } else {
7057                         print "<tr class=\"light\">\n";
7058                 }
7059                 $alternate ^= 1;
7060
7061                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7062
7063                 print "</tr>\n";
7064         }
7065         print "</table>\n" .
7066               "</div>";
7067         git_footer_html();
7068 }
7069
7070 sub snapshot_name {
7071         my ($project, $hash) = @_;
7072
7073         # path/to/project.git  -> project
7074         # path/to/project/.git -> project
7075         my $name = to_utf8($project);
7076         $name =~ s,([^/])/*\.git$,$1,;
7077         $name = basename($name);
7078         # sanitize name
7079         $name =~ s/[[:cntrl:]]/?/g;
7080
7081         my $ver = $hash;
7082         if ($hash =~ /^[0-9a-fA-F]+$/) {
7083                 # shorten SHA-1 hash
7084                 my $full_hash = git_get_full_hash($project, $hash);
7085                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7086                         $ver = git_get_short_hash($project, $hash);
7087                 }
7088         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7089                 # tags don't need shortened SHA-1 hash
7090                 $ver = $1;
7091         } else {
7092                 # branches and other need shortened SHA-1 hash
7093                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7094                         $ver = $1;
7095                 }
7096                 $ver .= '-' . git_get_short_hash($project, $hash);
7097         }
7098         # in case of hierarchical branch names
7099         $ver =~ s!/!.!g;
7100
7101         # name = project-version_string
7102         $name = "$name-$ver";
7103
7104         return wantarray ? ($name, $name) : $name;
7105 }
7106
7107 sub git_snapshot {
7108         my $format = $input_params{'snapshot_format'};
7109         if (!@snapshot_fmts) {
7110                 die_error(403, "Snapshots not allowed");
7111         }
7112         # default to first supported snapshot format
7113         $format ||= $snapshot_fmts[0];
7114         if ($format !~ m/^[a-z0-9]+$/) {
7115                 die_error(400, "Invalid snapshot format parameter");
7116         } elsif (!exists($known_snapshot_formats{$format})) {
7117                 die_error(400, "Unknown snapshot format");
7118         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7119                 die_error(403, "Snapshot format not allowed");
7120         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7121                 die_error(403, "Unsupported snapshot format");
7122         }
7123
7124         my $type = git_get_type("$hash^{}");
7125         if (!$type) {
7126                 die_error(404, 'Object does not exist');
7127         }  elsif ($type eq 'blob') {
7128                 die_error(400, 'Object is not a tree-ish');
7129         }
7130
7131         my ($name, $prefix) = snapshot_name($project, $hash);
7132         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7133         my $cmd = quote_command(
7134                 git_cmd(), 'archive',
7135                 "--format=$known_snapshot_formats{$format}{'format'}",
7136                 "--prefix=$prefix/", $hash);
7137         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7138                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7139         }
7140
7141         $filename =~ s/(["\\])/\\$1/g;
7142         print $cgi->header(
7143                 -type => $known_snapshot_formats{$format}{'type'},
7144                 -content_disposition => 'inline; filename="' . $filename . '"',
7145                 -status => '200 OK');
7146
7147         open my $fd, "-|", $cmd
7148                 or die_error(500, "Execute git-archive failed");
7149         binmode STDOUT, ':raw';
7150         print <$fd>;
7151         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7152         close $fd;
7153 }
7154
7155 sub git_log_generic {
7156         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7157
7158         my $head = git_get_head_hash($project);
7159         if (!defined $base) {
7160                 $base = $head;
7161         }
7162         if (!defined $page) {
7163                 $page = 0;
7164         }
7165         my $refs = git_get_references();
7166
7167         my $commit_hash = $base;
7168         if (defined $parent) {
7169                 $commit_hash = "$parent..$base";
7170         }
7171         my @commitlist =
7172                 parse_commits($commit_hash, 101, (100 * $page),
7173                               defined $file_name ? ($file_name, "--full-history") : ());
7174
7175         my $ftype;
7176         if (!defined $file_hash && defined $file_name) {
7177                 # some commits could have deleted file in question,
7178                 # and not have it in tree, but one of them has to have it
7179                 for (my $i = 0; $i < @commitlist; $i++) {
7180                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7181                         last if defined $file_hash;
7182                 }
7183         }
7184         if (defined $file_hash) {
7185                 $ftype = git_get_type($file_hash);
7186         }
7187         if (defined $file_name && !defined $ftype) {
7188                 die_error(500, "Unknown type of object");
7189         }
7190         my %co;
7191         if (defined $file_name) {
7192                 %co = parse_commit($base)
7193                         or die_error(404, "Unknown commit object");
7194         }
7195
7196
7197         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7198         my $next_link = '';
7199         if ($#commitlist >= 100) {
7200                 $next_link =
7201                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7202                                  -accesskey => "n", -title => "Alt-n"}, "next");
7203         }
7204         my $patch_max = gitweb_get_feature('patches');
7205         if ($patch_max && !defined $file_name) {
7206                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7207                         $paging_nav .= " &sdot; " .
7208                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7209                                         "patches");
7210                 }
7211         }
7212
7213         git_header_html();
7214         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7215         if (defined $file_name) {
7216                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7217         } else {
7218                 git_print_header_div('summary', $project)
7219         }
7220         git_print_page_path($file_name, $ftype, $hash_base)
7221                 if (defined $file_name);
7222
7223         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7224                      $file_name, $file_hash, $ftype);
7225
7226         git_footer_html();
7227 }
7228
7229 sub git_log {
7230         git_log_generic('log', \&git_log_body,
7231                         $hash, $hash_parent);
7232 }
7233
7234 sub git_commit {
7235         $hash ||= $hash_base || "HEAD";
7236         my %co = parse_commit($hash)
7237             or die_error(404, "Unknown commit object");
7238
7239         my $parent  = $co{'parent'};
7240         my $parents = $co{'parents'}; # listref
7241
7242         # we need to prepare $formats_nav before any parameter munging
7243         my $formats_nav;
7244         if (!defined $parent) {
7245                 # --root commitdiff
7246                 $formats_nav .= '(initial)';
7247         } elsif (@$parents == 1) {
7248                 # single parent commit
7249                 $formats_nav .=
7250                         '(parent: ' .
7251                         $cgi->a({-href => href(action=>"commit",
7252                                                hash=>$parent)},
7253                                 esc_html(substr($parent, 0, 7))) .
7254                         ')';
7255         } else {
7256                 # merge commit
7257                 $formats_nav .=
7258                         '(merge: ' .
7259                         join(' ', map {
7260                                 $cgi->a({-href => href(action=>"commit",
7261                                                        hash=>$_)},
7262                                         esc_html(substr($_, 0, 7)));
7263                         } @$parents ) .
7264                         ')';
7265         }
7266         if (gitweb_check_feature('patches') && @$parents <= 1) {
7267                 $formats_nav .= " | " .
7268                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7269                                 "patch");
7270         }
7271
7272         if (!defined $parent) {
7273                 $parent = "--root";
7274         }
7275         my @difftree;
7276         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7277                 @diff_opts,
7278                 (@$parents <= 1 ? $parent : '-c'),
7279                 $hash, "--"
7280                 or die_error(500, "Open git-diff-tree failed");
7281         @difftree = map { chomp; $_ } <$fd>;
7282         close $fd or die_error(404, "Reading git-diff-tree failed");
7283
7284         # non-textual hash id's can be cached
7285         my $expires;
7286         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7287                 $expires = "+1d";
7288         }
7289         my $refs = git_get_references();
7290         my $ref = format_ref_marker($refs, $co{'id'});
7291
7292         git_header_html(undef, $expires);
7293         git_print_page_nav('commit', '',
7294                            $hash, $co{'tree'}, $hash,
7295                            $formats_nav);
7296
7297         if (defined $co{'parent'}) {
7298                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7299         } else {
7300                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7301         }
7302         print "<div class=\"title_text\">\n" .
7303               "<table class=\"object_header\">\n";
7304         git_print_authorship_rows(\%co);
7305         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7306         print "<tr>" .
7307               "<td>tree</td>" .
7308               "<td class=\"sha1\">" .
7309               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7310                        class => "list"}, $co{'tree'}) .
7311               "</td>" .
7312               "<td class=\"link\">" .
7313               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7314                       "tree");
7315         my $snapshot_links = format_snapshot_links($hash);
7316         if (defined $snapshot_links) {
7317                 print " | " . $snapshot_links;
7318         }
7319         print "</td>" .
7320               "</tr>\n";
7321
7322         foreach my $par (@$parents) {
7323                 print "<tr>" .
7324                       "<td>parent</td>" .
7325                       "<td class=\"sha1\">" .
7326                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7327                                class => "list"}, $par) .
7328                       "</td>" .
7329                       "<td class=\"link\">" .
7330                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7331                       " | " .
7332                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7333                       "</td>" .
7334                       "</tr>\n";
7335         }
7336         print "</table>".
7337               "</div>\n";
7338
7339         print "<div class=\"page_body\">\n";
7340         git_print_log($co{'comment'});
7341         print "</div>\n";
7342
7343         git_difftree_body(\@difftree, $hash, @$parents);
7344
7345         git_footer_html();
7346 }
7347
7348 sub git_object {
7349         # object is defined by:
7350         # - hash or hash_base alone
7351         # - hash_base and file_name
7352         my $type;
7353
7354         # - hash or hash_base alone
7355         if ($hash || ($hash_base && !defined $file_name)) {
7356                 my $object_id = $hash || $hash_base;
7357
7358                 open my $fd, "-|", quote_command(
7359                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7360                         or die_error(404, "Object does not exist");
7361                 $type = <$fd>;
7362                 chomp $type;
7363                 close $fd
7364                         or die_error(404, "Object does not exist");
7365
7366         # - hash_base and file_name
7367         } elsif ($hash_base && defined $file_name) {
7368                 $file_name =~ s,/+$,,;
7369
7370                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7371                         or die_error(404, "Base object does not exist");
7372
7373                 # here errors should not hapen
7374                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7375                         or die_error(500, "Open git-ls-tree failed");
7376                 my $line = <$fd>;
7377                 close $fd;
7378
7379                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7380                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7381                         die_error(404, "File or directory for given base does not exist");
7382                 }
7383                 $type = $2;
7384                 $hash = $3;
7385         } else {
7386                 die_error(400, "Not enough information to find object");
7387         }
7388
7389         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7390                                           hash=>$hash, hash_base=>$hash_base,
7391                                           file_name=>$file_name),
7392                              -status => '302 Found');
7393 }
7394
7395 sub git_blobdiff {
7396         my $format = shift || 'html';
7397         my $diff_style = $input_params{'diff_style'} || 'inline';
7398
7399         my $fd;
7400         my @difftree;
7401         my %diffinfo;
7402         my $expires;
7403
7404         # preparing $fd and %diffinfo for git_patchset_body
7405         # new style URI
7406         if (defined $hash_base && defined $hash_parent_base) {
7407                 if (defined $file_name) {
7408                         # read raw output
7409                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7410                                 $hash_parent_base, $hash_base,
7411                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7412                                 or die_error(500, "Open git-diff-tree failed");
7413                         @difftree = map { chomp; $_ } <$fd>;
7414                         close $fd
7415                                 or die_error(404, "Reading git-diff-tree failed");
7416                         @difftree
7417                                 or die_error(404, "Blob diff not found");
7418
7419                 } elsif (defined $hash &&
7420                          $hash =~ /[0-9a-fA-F]{40}/) {
7421                         # try to find filename from $hash
7422
7423                         # read filtered raw output
7424                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7425                                 $hash_parent_base, $hash_base, "--"
7426                                 or die_error(500, "Open git-diff-tree failed");
7427                         @difftree =
7428                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7429                                 # $hash == to_id
7430                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7431                                 map { chomp; $_ } <$fd>;
7432                         close $fd
7433                                 or die_error(404, "Reading git-diff-tree failed");
7434                         @difftree
7435                                 or die_error(404, "Blob diff not found");
7436
7437                 } else {
7438                         die_error(400, "Missing one of the blob diff parameters");
7439                 }
7440
7441                 if (@difftree > 1) {
7442                         die_error(400, "Ambiguous blob diff specification");
7443                 }
7444
7445                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7446                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7447                 $file_name   ||= $diffinfo{'to_file'};
7448
7449                 $hash_parent ||= $diffinfo{'from_id'};
7450                 $hash        ||= $diffinfo{'to_id'};
7451
7452                 # non-textual hash id's can be cached
7453                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7454                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7455                         $expires = '+1d';
7456                 }
7457
7458                 # open patch output
7459                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7460                         '-p', ($format eq 'html' ? "--full-index" : ()),
7461                         $hash_parent_base, $hash_base,
7462                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7463                         or die_error(500, "Open git-diff-tree failed");
7464         }
7465
7466         # old/legacy style URI -- not generated anymore since 1.4.3.
7467         if (!%diffinfo) {
7468                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7469         }
7470
7471         # header
7472         if ($format eq 'html') {
7473                 my $formats_nav =
7474                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7475                                 "raw");
7476                 $formats_nav .= diff_style_nav($diff_style);
7477                 git_header_html(undef, $expires);
7478                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7479                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7480                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7481                 } else {
7482                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7483                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7484                 }
7485                 if (defined $file_name) {
7486                         git_print_page_path($file_name, "blob", $hash_base);
7487                 } else {
7488                         print "<div class=\"page_path\"></div>\n";
7489                 }
7490
7491         } elsif ($format eq 'plain') {
7492                 print $cgi->header(
7493                         -type => 'text/plain',
7494                         -charset => 'utf-8',
7495                         -expires => $expires,
7496                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7497
7498                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7499
7500         } else {
7501                 die_error(400, "Unknown blobdiff format");
7502         }
7503
7504         # patch
7505         if ($format eq 'html') {
7506                 print "<div class=\"page_body\">\n";
7507
7508                 git_patchset_body($fd, $diff_style,
7509                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7510                 close $fd;
7511
7512                 print "</div>\n"; # class="page_body"
7513                 git_footer_html();
7514
7515         } else {
7516                 while (my $line = <$fd>) {
7517                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7518                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7519
7520                         print $line;
7521
7522                         last if $line =~ m!^\+\+\+!;
7523                 }
7524                 local $/ = undef;
7525                 print <$fd>;
7526                 close $fd;
7527         }
7528 }
7529
7530 sub git_blobdiff_plain {
7531         git_blobdiff('plain');
7532 }
7533
7534 # assumes that it is added as later part of already existing navigation,
7535 # so it returns "| foo | bar" rather than just "foo | bar"
7536 sub diff_style_nav {
7537         my ($diff_style, $is_combined) = @_;
7538         $diff_style ||= 'inline';
7539
7540         return "" if ($is_combined);
7541
7542         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7543         my %styles = @styles;
7544         @styles =
7545                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7546
7547         return join '',
7548                 map { " | ".$_ }
7549                 map {
7550                         $_ eq $diff_style ? $styles{$_} :
7551                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7552                 } @styles;
7553 }
7554
7555 sub git_commitdiff {
7556         my %params = @_;
7557         my $format = $params{-format} || 'html';
7558         my $diff_style = $input_params{'diff_style'} || 'inline';
7559
7560         my ($patch_max) = gitweb_get_feature('patches');
7561         if ($format eq 'patch') {
7562                 die_error(403, "Patch view not allowed") unless $patch_max;
7563         }
7564
7565         $hash ||= $hash_base || "HEAD";
7566         my %co = parse_commit($hash)
7567             or die_error(404, "Unknown commit object");
7568
7569         # choose format for commitdiff for merge
7570         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7571                 $hash_parent = '--cc';
7572         }
7573         # we need to prepare $formats_nav before almost any parameter munging
7574         my $formats_nav;
7575         if ($format eq 'html') {
7576                 $formats_nav =
7577                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7578                                 "raw");
7579                 if ($patch_max && @{$co{'parents'}} <= 1) {
7580                         $formats_nav .= " | " .
7581                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7582                                         "patch");
7583                 }
7584                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7585
7586                 if (defined $hash_parent &&
7587                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7588                         # commitdiff with two commits given
7589                         my $hash_parent_short = $hash_parent;
7590                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7591                                 $hash_parent_short = substr($hash_parent, 0, 7);
7592                         }
7593                         $formats_nav .=
7594                                 ' (from';
7595                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7596                                 if ($co{'parents'}[$i] eq $hash_parent) {
7597                                         $formats_nav .= ' parent ' . ($i+1);
7598                                         last;
7599                                 }
7600                         }
7601                         $formats_nav .= ': ' .
7602                                 $cgi->a({-href => href(-replay=>1,
7603                                                        hash=>$hash_parent, hash_base=>undef)},
7604                                         esc_html($hash_parent_short)) .
7605                                 ')';
7606                 } elsif (!$co{'parent'}) {
7607                         # --root commitdiff
7608                         $formats_nav .= ' (initial)';
7609                 } elsif (scalar @{$co{'parents'}} == 1) {
7610                         # single parent commit
7611                         $formats_nav .=
7612                                 ' (parent: ' .
7613                                 $cgi->a({-href => href(-replay=>1,
7614                                                        hash=>$co{'parent'}, hash_base=>undef)},
7615                                         esc_html(substr($co{'parent'}, 0, 7))) .
7616                                 ')';
7617                 } else {
7618                         # merge commit
7619                         if ($hash_parent eq '--cc') {
7620                                 $formats_nav .= ' | ' .
7621                                         $cgi->a({-href => href(-replay=>1,
7622                                                                hash=>$hash, hash_parent=>'-c')},
7623                                                 'combined');
7624                         } else { # $hash_parent eq '-c'
7625                                 $formats_nav .= ' | ' .
7626                                         $cgi->a({-href => href(-replay=>1,
7627                                                                hash=>$hash, hash_parent=>'--cc')},
7628                                                 'compact');
7629                         }
7630                         $formats_nav .=
7631                                 ' (merge: ' .
7632                                 join(' ', map {
7633                                         $cgi->a({-href => href(-replay=>1,
7634                                                                hash=>$_, hash_base=>undef)},
7635                                                 esc_html(substr($_, 0, 7)));
7636                                 } @{$co{'parents'}} ) .
7637                                 ')';
7638                 }
7639         }
7640
7641         my $hash_parent_param = $hash_parent;
7642         if (!defined $hash_parent_param) {
7643                 # --cc for multiple parents, --root for parentless
7644                 $hash_parent_param =
7645                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7646         }
7647
7648         # read commitdiff
7649         my $fd;
7650         my @difftree;
7651         if ($format eq 'html') {
7652                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7653                         "--no-commit-id", "--patch-with-raw", "--full-index",
7654                         $hash_parent_param, $hash, "--"
7655                         or die_error(500, "Open git-diff-tree failed");
7656
7657                 while (my $line = <$fd>) {
7658                         chomp $line;
7659                         # empty line ends raw part of diff-tree output
7660                         last unless $line;
7661                         push @difftree, scalar parse_difftree_raw_line($line);
7662                 }
7663
7664         } elsif ($format eq 'plain') {
7665                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7666                         '-p', $hash_parent_param, $hash, "--"
7667                         or die_error(500, "Open git-diff-tree failed");
7668         } elsif ($format eq 'patch') {
7669                 # For commit ranges, we limit the output to the number of
7670                 # patches specified in the 'patches' feature.
7671                 # For single commits, we limit the output to a single patch,
7672                 # diverging from the git-format-patch default.
7673                 my @commit_spec = ();
7674                 if ($hash_parent) {
7675                         if ($patch_max > 0) {
7676                                 push @commit_spec, "-$patch_max";
7677                         }
7678                         push @commit_spec, '-n', "$hash_parent..$hash";
7679                 } else {
7680                         if ($params{-single}) {
7681                                 push @commit_spec, '-1';
7682                         } else {
7683                                 if ($patch_max > 0) {
7684                                         push @commit_spec, "-$patch_max";
7685                                 }
7686                                 push @commit_spec, "-n";
7687                         }
7688                         push @commit_spec, '--root', $hash;
7689                 }
7690                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7691                         '--encoding=utf8', '--stdout', @commit_spec
7692                         or die_error(500, "Open git-format-patch failed");
7693         } else {
7694                 die_error(400, "Unknown commitdiff format");
7695         }
7696
7697         # non-textual hash id's can be cached
7698         my $expires;
7699         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7700                 $expires = "+1d";
7701         }
7702
7703         # write commit message
7704         if ($format eq 'html') {
7705                 my $refs = git_get_references();
7706                 my $ref = format_ref_marker($refs, $co{'id'});
7707
7708                 git_header_html(undef, $expires);
7709                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7710                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7711                 print "<div class=\"title_text\">\n" .
7712                       "<table class=\"object_header\">\n";
7713                 git_print_authorship_rows(\%co);
7714                 print "</table>".
7715                       "</div>\n";
7716                 print "<div class=\"page_body\">\n";
7717                 if (@{$co{'comment'}} > 1) {
7718                         print "<div class=\"log\">\n";
7719                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7720                         print "</div>\n"; # class="log"
7721                 }
7722
7723         } elsif ($format eq 'plain') {
7724                 my $refs = git_get_references("tags");
7725                 my $tagname = git_get_rev_name_tags($hash);
7726                 my $filename = basename($project) . "-$hash.patch";
7727
7728                 print $cgi->header(
7729                         -type => 'text/plain',
7730                         -charset => 'utf-8',
7731                         -expires => $expires,
7732                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7733                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7734                 print "From: " . to_utf8($co{'author'}) . "\n";
7735                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7736                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7737
7738                 print "X-Git-Tag: $tagname\n" if $tagname;
7739                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7740
7741                 foreach my $line (@{$co{'comment'}}) {
7742                         print to_utf8($line) . "\n";
7743                 }
7744                 print "---\n\n";
7745         } elsif ($format eq 'patch') {
7746                 my $filename = basename($project) . "-$hash.patch";
7747
7748                 print $cgi->header(
7749                         -type => 'text/plain',
7750                         -charset => 'utf-8',
7751                         -expires => $expires,
7752                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7753         }
7754
7755         # write patch
7756         if ($format eq 'html') {
7757                 my $use_parents = !defined $hash_parent ||
7758                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7759                 git_difftree_body(\@difftree, $hash,
7760                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7761                 print "<br/>\n";
7762
7763                 git_patchset_body($fd, $diff_style,
7764                                   \@difftree, $hash,
7765                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7766                 close $fd;
7767                 print "</div>\n"; # class="page_body"
7768                 git_footer_html();
7769
7770         } elsif ($format eq 'plain') {
7771                 local $/ = undef;
7772                 print <$fd>;
7773                 close $fd
7774                         or print "Reading git-diff-tree failed\n";
7775         } elsif ($format eq 'patch') {
7776                 local $/ = undef;
7777                 print <$fd>;
7778                 close $fd
7779                         or print "Reading git-format-patch failed\n";
7780         }
7781 }
7782
7783 sub git_commitdiff_plain {
7784         git_commitdiff(-format => 'plain');
7785 }
7786
7787 # format-patch-style patches
7788 sub git_patch {
7789         git_commitdiff(-format => 'patch', -single => 1);
7790 }
7791
7792 sub git_patches {
7793         git_commitdiff(-format => 'patch');
7794 }
7795
7796 sub git_history {
7797         git_log_generic('history', \&git_history_body,
7798                         $hash_base, $hash_parent_base,
7799                         $file_name, $hash);
7800 }
7801
7802 sub git_search {
7803         $searchtype ||= 'commit';
7804
7805         # check if appropriate features are enabled
7806         gitweb_check_feature('search')
7807                 or die_error(403, "Search is disabled");
7808         if ($searchtype eq 'pickaxe') {
7809                 # pickaxe may take all resources of your box and run for several minutes
7810                 # with every query - so decide by yourself how public you make this feature
7811                 gitweb_check_feature('pickaxe')
7812                         or die_error(403, "Pickaxe search is disabled");
7813         }
7814         if ($searchtype eq 'grep') {
7815                 # grep search might be potentially CPU-intensive, too
7816                 gitweb_check_feature('grep')
7817                         or die_error(403, "Grep search is disabled");
7818         }
7819
7820         if (!defined $searchtext) {
7821                 die_error(400, "Text field is empty");
7822         }
7823         if (!defined $hash) {
7824                 $hash = git_get_head_hash($project);
7825         }
7826         my %co = parse_commit($hash);
7827         if (!%co) {
7828                 die_error(404, "Unknown commit object");
7829         }
7830         if (!defined $page) {
7831                 $page = 0;
7832         }
7833
7834         if ($searchtype eq 'commit' ||
7835             $searchtype eq 'author' ||
7836             $searchtype eq 'committer') {
7837                 git_search_message(%co);
7838         } elsif ($searchtype eq 'pickaxe') {
7839                 git_search_changes(%co);
7840         } elsif ($searchtype eq 'grep') {
7841                 git_search_files(%co);
7842         } else {
7843                 die_error(400, "Unknown search type");
7844         }
7845 }
7846
7847 sub git_search_help {
7848         git_header_html();
7849         git_print_page_nav('','', $hash,$hash,$hash);
7850         print <<EOT;
7851 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7852 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7853 the pattern entered is recognized as the POSIX extended
7854 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7855 insensitive).</p>
7856 <dl>
7857 <dt><b>commit</b></dt>
7858 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7859 EOT
7860         my $have_grep = gitweb_check_feature('grep');
7861         if ($have_grep) {
7862                 print <<EOT;
7863 <dt><b>grep</b></dt>
7864 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7865     a different one) are searched for the given pattern. On large trees, this search can take
7866 a while and put some strain on the server, so please use it with some consideration. Note that
7867 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7868 case-sensitive.</dd>
7869 EOT
7870         }
7871         print <<EOT;
7872 <dt><b>author</b></dt>
7873 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7874 <dt><b>committer</b></dt>
7875 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7876 EOT
7877         my $have_pickaxe = gitweb_check_feature('pickaxe');
7878         if ($have_pickaxe) {
7879                 print <<EOT;
7880 <dt><b>pickaxe</b></dt>
7881 <dd>All commits that caused the string to appear or disappear from any file (changes that
7882 added, removed or "modified" the string) will be listed. This search can take a while and
7883 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7884 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7885 EOT
7886         }
7887         print "</dl>\n";
7888         git_footer_html();
7889 }
7890
7891 sub git_shortlog {
7892         git_log_generic('shortlog', \&git_shortlog_body,
7893                         $hash, $hash_parent);
7894 }
7895
7896 ## ......................................................................
7897 ## feeds (RSS, Atom; OPML)
7898
7899 sub git_feed {
7900         my $format = shift || 'atom';
7901         my $have_blame = gitweb_check_feature('blame');
7902
7903         # Atom: http://www.atomenabled.org/developers/syndication/
7904         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7905         if ($format ne 'rss' && $format ne 'atom') {
7906                 die_error(400, "Unknown web feed format");
7907         }
7908
7909         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7910         my $head = $hash || 'HEAD';
7911         my @commitlist = parse_commits($head, 150, 0, $file_name);
7912
7913         my %latest_commit;
7914         my %latest_date;
7915         my $content_type = "application/$format+xml";
7916         if (defined $cgi->http('HTTP_ACCEPT') &&
7917                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7918                 # browser (feed reader) prefers text/xml
7919                 $content_type = 'text/xml';
7920         }
7921         if (defined($commitlist[0])) {
7922                 %latest_commit = %{$commitlist[0]};
7923                 my $latest_epoch = $latest_commit{'committer_epoch'};
7924                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7925                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7926                 if (defined $if_modified) {
7927                         my $since;
7928                         if (eval { require HTTP::Date; 1; }) {
7929                                 $since = HTTP::Date::str2time($if_modified);
7930                         } elsif (eval { require Time::ParseDate; 1; }) {
7931                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7932                         }
7933                         if (defined $since && $latest_epoch <= $since) {
7934                                 print $cgi->header(
7935                                         -type => $content_type,
7936                                         -charset => 'utf-8',
7937                                         -last_modified => $latest_date{'rfc2822'},
7938                                         -status => '304 Not Modified');
7939                                 return;
7940                         }
7941                 }
7942                 print $cgi->header(
7943                         -type => $content_type,
7944                         -charset => 'utf-8',
7945                         -last_modified => $latest_date{'rfc2822'});
7946         } else {
7947                 print $cgi->header(
7948                         -type => $content_type,
7949                         -charset => 'utf-8');
7950         }
7951
7952         # Optimization: skip generating the body if client asks only
7953         # for Last-Modified date.
7954         return if ($cgi->request_method() eq 'HEAD');
7955
7956         # header variables
7957         my $title = "$site_name - $project/$action";
7958         my $feed_type = 'log';
7959         if (defined $hash) {
7960                 $title .= " - '$hash'";
7961                 $feed_type = 'branch log';
7962                 if (defined $file_name) {
7963                         $title .= " :: $file_name";
7964                         $feed_type = 'history';
7965                 }
7966         } elsif (defined $file_name) {
7967                 $title .= " - $file_name";
7968                 $feed_type = 'history';
7969         }
7970         $title .= " $feed_type";
7971         my $descr = git_get_project_description($project);
7972         if (defined $descr) {
7973                 $descr = esc_html($descr);
7974         } else {
7975                 $descr = "$project " .
7976                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7977                          " feed";
7978         }
7979         my $owner = git_get_project_owner($project);
7980         $owner = esc_html($owner);
7981
7982         #header
7983         my $alt_url;
7984         if (defined $file_name) {
7985                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7986         } elsif (defined $hash) {
7987                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7988         } else {
7989                 $alt_url = href(-full=>1, action=>"summary");
7990         }
7991         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7992         if ($format eq 'rss') {
7993                 print <<XML;
7994 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7995 <channel>
7996 XML
7997                 print "<title>$title</title>\n" .
7998                       "<link>$alt_url</link>\n" .
7999                       "<description>$descr</description>\n" .
8000                       "<language>en</language>\n" .
8001                       # project owner is responsible for 'editorial' content
8002                       "<managingEditor>$owner</managingEditor>\n";
8003                 if (defined $logo || defined $favicon) {
8004                         # prefer the logo to the favicon, since RSS
8005                         # doesn't allow both
8006                         my $img = esc_url($logo || $favicon);
8007                         print "<image>\n" .
8008                               "<url>$img</url>\n" .
8009                               "<title>$title</title>\n" .
8010                               "<link>$alt_url</link>\n" .
8011                               "</image>\n";
8012                 }
8013                 if (%latest_date) {
8014                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8015                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8016                 }
8017                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8018         } elsif ($format eq 'atom') {
8019                 print <<XML;
8020 <feed xmlns="http://www.w3.org/2005/Atom">
8021 XML
8022                 print "<title>$title</title>\n" .
8023                       "<subtitle>$descr</subtitle>\n" .
8024                       '<link rel="alternate" type="text/html" href="' .
8025                       $alt_url . '" />' . "\n" .
8026                       '<link rel="self" type="' . $content_type . '" href="' .
8027                       $cgi->self_url() . '" />' . "\n" .
8028                       "<id>" . href(-full=>1) . "</id>\n" .
8029                       # use project owner for feed author
8030                       "<author><name>$owner</name></author>\n";
8031                 if (defined $favicon) {
8032                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8033                 }
8034                 if (defined $logo) {
8035                         # not twice as wide as tall: 72 x 27 pixels
8036                         print "<logo>" . esc_url($logo) . "</logo>\n";
8037                 }
8038                 if (! %latest_date) {
8039                         # dummy date to keep the feed valid until commits trickle in:
8040                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8041                 } else {
8042                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8043                 }
8044                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8045         }
8046
8047         # contents
8048         for (my $i = 0; $i <= $#commitlist; $i++) {
8049                 my %co = %{$commitlist[$i]};
8050                 my $commit = $co{'id'};
8051                 # we read 150, we always show 30 and the ones more recent than 48 hours
8052                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8053                         last;
8054                 }
8055                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8056
8057                 # get list of changed files
8058                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8059                         $co{'parent'} || "--root",
8060                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8061                         or next;
8062                 my @difftree = map { chomp; $_ } <$fd>;
8063                 close $fd
8064                         or next;
8065
8066                 # print element (entry, item)
8067                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8068                 if ($format eq 'rss') {
8069                         print "<item>\n" .
8070                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8071                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8072                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8073                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8074                               "<link>$co_url</link>\n" .
8075                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8076                               "<content:encoded>" .
8077                               "<![CDATA[\n";
8078                 } elsif ($format eq 'atom') {
8079                         print "<entry>\n" .
8080                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8081                               "<updated>$cd{'iso-8601'}</updated>\n" .
8082                               "<author>\n" .
8083                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8084                         if ($co{'author_email'}) {
8085                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8086                         }
8087                         print "</author>\n" .
8088                               # use committer for contributor
8089                               "<contributor>\n" .
8090                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8091                         if ($co{'committer_email'}) {
8092                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8093                         }
8094                         print "</contributor>\n" .
8095                               "<published>$cd{'iso-8601'}</published>\n" .
8096                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8097                               "<id>$co_url</id>\n" .
8098                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8099                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8100                 }
8101                 my $comment = $co{'comment'};
8102                 print "<pre>\n";
8103                 foreach my $line (@$comment) {
8104                         $line = esc_html($line);
8105                         print "$line\n";
8106                 }
8107                 print "</pre><ul>\n";
8108                 foreach my $difftree_line (@difftree) {
8109                         my %difftree = parse_difftree_raw_line($difftree_line);
8110                         next if !$difftree{'from_id'};
8111
8112                         my $file = $difftree{'file'} || $difftree{'to_file'};
8113
8114                         print "<li>" .
8115                               "[" .
8116                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8117                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8118                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8119                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8120                                       -title => "diff"}, 'D');
8121                         if ($have_blame) {
8122                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8123                                                              file_name=>$file, hash_base=>$commit),
8124                                               -title => "blame"}, 'B');
8125                         }
8126                         # if this is not a feed of a file history
8127                         if (!defined $file_name || $file_name ne $file) {
8128                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8129                                                              file_name=>$file, hash=>$commit),
8130                                               -title => "history"}, 'H');
8131                         }
8132                         $file = esc_path($file);
8133                         print "] ".
8134                               "$file</li>\n";
8135                 }
8136                 if ($format eq 'rss') {
8137                         print "</ul>]]>\n" .
8138                               "</content:encoded>\n" .
8139                               "</item>\n";
8140                 } elsif ($format eq 'atom') {
8141                         print "</ul>\n</div>\n" .
8142                               "</content>\n" .
8143                               "</entry>\n";
8144                 }
8145         }
8146
8147         # end of feed
8148         if ($format eq 'rss') {
8149                 print "</channel>\n</rss>\n";
8150         } elsif ($format eq 'atom') {
8151                 print "</feed>\n";
8152         }
8153 }
8154
8155 sub git_rss {
8156         git_feed('rss');
8157 }
8158
8159 sub git_atom {
8160         git_feed('atom');
8161 }
8162
8163 sub git_opml {
8164         my @list = git_get_projects_list($project_filter, $strict_export);
8165         if (!@list) {
8166                 die_error(404, "No projects found");
8167         }
8168
8169         print $cgi->header(
8170                 -type => 'text/xml',
8171                 -charset => 'utf-8',
8172                 -content_disposition => 'inline; filename="opml.xml"');
8173
8174         my $title = esc_html($site_name);
8175         my $filter = " within subdirectory ";
8176         if (defined $project_filter) {
8177                 $filter .= esc_html($project_filter);
8178         } else {
8179                 $filter = "";
8180         }
8181         print <<XML;
8182 <?xml version="1.0" encoding="utf-8"?>
8183 <opml version="1.0">
8184 <head>
8185   <title>$title OPML Export$filter</title>
8186 </head>
8187 <body>
8188 <outline text="git RSS feeds">
8189 XML
8190
8191         foreach my $pr (@list) {
8192                 my %proj = %$pr;
8193                 my $head = git_get_head_hash($proj{'path'});
8194                 if (!defined $head) {
8195                         next;
8196                 }
8197                 $git_dir = "$projectroot/$proj{'path'}";
8198                 my %co = parse_commit($head);
8199                 if (!%co) {
8200                         next;
8201                 }
8202
8203                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8204                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8205                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8206                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8207         }
8208         print <<XML;
8209 </outline>
8210 </body>
8211 </opml>
8212 XML
8213 }