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                 } elsif (defined $type && $type eq 'tree') {
4438                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4439                                                      hash_base=>$hb),
4440                                       -title => $name}, esc_path($basename));
4441                         print " / ";
4442                 } else {
4443                         print esc_path($basename);
4444                 }
4445         }
4446         print "<br/></div>\n";
4447 }
4448
4449 sub git_print_log {
4450         my $log = shift;
4451         my %opts = @_;
4452
4453         if ($opts{'-remove_title'}) {
4454                 # remove title, i.e. first line of log
4455                 shift @$log;
4456         }
4457         # remove leading empty lines
4458         while (defined $log->[0] && $log->[0] eq "") {
4459                 shift @$log;
4460         }
4461
4462         # print log
4463         my $signoff = 0;
4464         my $empty = 0;
4465         foreach my $line (@$log) {
4466                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4467                         $signoff = 1;
4468                         $empty = 0;
4469                         if (! $opts{'-remove_signoff'}) {
4470                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4471                                 next;
4472                         } else {
4473                                 # remove signoff lines
4474                                 next;
4475                         }
4476                 } else {
4477                         $signoff = 0;
4478                 }
4479
4480                 # print only one empty line
4481                 # do not print empty line after signoff
4482                 if ($line eq "") {
4483                         next if ($empty || $signoff);
4484                         $empty = 1;
4485                 } else {
4486                         $empty = 0;
4487                 }
4488
4489                 print format_log_line_html($line) . "<br/>\n";
4490         }
4491
4492         if ($opts{'-final_empty_line'}) {
4493                 # end with single empty line
4494                 print "<br/>\n" unless $empty;
4495         }
4496 }
4497
4498 # return link target (what link points to)
4499 sub git_get_link_target {
4500         my $hash = shift;
4501         my $link_target;
4502
4503         # read link
4504         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4505                 or return;
4506         {
4507                 local $/ = undef;
4508                 $link_target = <$fd>;
4509         }
4510         close $fd
4511                 or return;
4512
4513         return $link_target;
4514 }
4515
4516 # given link target, and the directory (basedir) the link is in,
4517 # return target of link relative to top directory (top tree);
4518 # return undef if it is not possible (including absolute links).
4519 sub normalize_link_target {
4520         my ($link_target, $basedir) = @_;
4521
4522         # absolute symlinks (beginning with '/') cannot be normalized
4523         return if (substr($link_target, 0, 1) eq '/');
4524
4525         # normalize link target to path from top (root) tree (dir)
4526         my $path;
4527         if ($basedir) {
4528                 $path = $basedir . '/' . $link_target;
4529         } else {
4530                 # we are in top (root) tree (dir)
4531                 $path = $link_target;
4532         }
4533
4534         # remove //, /./, and /../
4535         my @path_parts;
4536         foreach my $part (split('/', $path)) {
4537                 # discard '.' and ''
4538                 next if (!$part || $part eq '.');
4539                 # handle '..'
4540                 if ($part eq '..') {
4541                         if (@path_parts) {
4542                                 pop @path_parts;
4543                         } else {
4544                                 # link leads outside repository (outside top dir)
4545                                 return;
4546                         }
4547                 } else {
4548                         push @path_parts, $part;
4549                 }
4550         }
4551         $path = join('/', @path_parts);
4552
4553         return $path;
4554 }
4555
4556 # print tree entry (row of git_tree), but without encompassing <tr> element
4557 sub git_print_tree_entry {
4558         my ($t, $basedir, $hash_base, $have_blame) = @_;
4559
4560         my %base_key = ();
4561         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4562
4563         # The format of a table row is: mode list link.  Where mode is
4564         # the mode of the entry, list is the name of the entry, an href,
4565         # and link is the action links of the entry.
4566
4567         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4568         if (exists $t->{'size'}) {
4569                 print "<td class=\"size\">$t->{'size'}</td>\n";
4570         }
4571         if ($t->{'type'} eq "blob") {
4572                 print "<td class=\"list\">" .
4573                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4574                                                file_name=>"$basedir$t->{'name'}", %base_key),
4575                                 -class => "list"}, esc_path($t->{'name'}));
4576                 if (S_ISLNK(oct $t->{'mode'})) {
4577                         my $link_target = git_get_link_target($t->{'hash'});
4578                         if ($link_target) {
4579                                 my $norm_target = normalize_link_target($link_target, $basedir);
4580                                 if (defined $norm_target) {
4581                                         print " -> " .
4582                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4583                                                                      file_name=>$norm_target),
4584                                                        -title => $norm_target}, esc_path($link_target));
4585                                 } else {
4586                                         print " -> " . esc_path($link_target);
4587                                 }
4588                         }
4589                 }
4590                 print "</td>\n";
4591                 print "<td class=\"link\">";
4592                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4593                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4594                               "blob");
4595                 if ($have_blame) {
4596                         print " | " .
4597                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4598                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4599                                       "blame");
4600                 }
4601                 if (defined $hash_base) {
4602                         print " | " .
4603                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4604                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4605                                       "history");
4606                 }
4607                 print " | " .
4608                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4609                                                file_name=>"$basedir$t->{'name'}")},
4610                                 "raw");
4611                 print "</td>\n";
4612
4613         } elsif ($t->{'type'} eq "tree") {
4614                 print "<td class=\"list\">";
4615                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4616                                              file_name=>"$basedir$t->{'name'}",
4617                                              %base_key)},
4618                               esc_path($t->{'name'}));
4619                 print "</td>\n";
4620                 print "<td class=\"link\">";
4621                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4622                                              file_name=>"$basedir$t->{'name'}",
4623                                              %base_key)},
4624                               "tree");
4625                 if (defined $hash_base) {
4626                         print " | " .
4627                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4628                                                      file_name=>"$basedir$t->{'name'}")},
4629                                       "history");
4630                 }
4631                 print "</td>\n";
4632         } else {
4633                 # unknown object: we can only present history for it
4634                 # (this includes 'commit' object, i.e. submodule support)
4635                 print "<td class=\"list\">" .
4636                       esc_path($t->{'name'}) .
4637                       "</td>\n";
4638                 print "<td class=\"link\">";
4639                 if (defined $hash_base) {
4640                         print $cgi->a({-href => href(action=>"history",
4641                                                      hash_base=>$hash_base,
4642                                                      file_name=>"$basedir$t->{'name'}")},
4643                                       "history");
4644                 }
4645                 print "</td>\n";
4646         }
4647 }
4648
4649 ## ......................................................................
4650 ## functions printing large fragments of HTML
4651
4652 # get pre-image filenames for merge (combined) diff
4653 sub fill_from_file_info {
4654         my ($diff, @parents) = @_;
4655
4656         $diff->{'from_file'} = [ ];
4657         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4658         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4659                 if ($diff->{'status'}[$i] eq 'R' ||
4660                     $diff->{'status'}[$i] eq 'C') {
4661                         $diff->{'from_file'}[$i] =
4662                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4663                 }
4664         }
4665
4666         return $diff;
4667 }
4668
4669 # is current raw difftree line of file deletion
4670 sub is_deleted {
4671         my $diffinfo = shift;
4672
4673         return $diffinfo->{'to_id'} eq ('0' x 40);
4674 }
4675
4676 # does patch correspond to [previous] difftree raw line
4677 # $diffinfo  - hashref of parsed raw diff format
4678 # $patchinfo - hashref of parsed patch diff format
4679 #              (the same keys as in $diffinfo)
4680 sub is_patch_split {
4681         my ($diffinfo, $patchinfo) = @_;
4682
4683         return defined $diffinfo && defined $patchinfo
4684                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4685 }
4686
4687
4688 sub git_difftree_body {
4689         my ($difftree, $hash, @parents) = @_;
4690         my ($parent) = $parents[0];
4691         my $have_blame = gitweb_check_feature('blame');
4692         print "<div class=\"list_head\">\n";
4693         if ($#{$difftree} > 10) {
4694                 print(($#{$difftree} + 1) . " files changed:\n");
4695         }
4696         print "</div>\n";
4697
4698         print "<table class=\"" .
4699               (@parents > 1 ? "combined " : "") .
4700               "diff_tree\">\n";
4701
4702         # header only for combined diff in 'commitdiff' view
4703         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4704         if ($has_header) {
4705                 # table header
4706                 print "<thead><tr>\n" .
4707                        "<th></th><th></th>\n"; # filename, patchN link
4708                 for (my $i = 0; $i < @parents; $i++) {
4709                         my $par = $parents[$i];
4710                         print "<th>" .
4711                               $cgi->a({-href => href(action=>"commitdiff",
4712                                                      hash=>$hash, hash_parent=>$par),
4713                                        -title => 'commitdiff to parent number ' .
4714                                                   ($i+1) . ': ' . substr($par,0,7)},
4715                                       $i+1) .
4716                               "&nbsp;</th>\n";
4717                 }
4718                 print "</tr></thead>\n<tbody>\n";
4719         }
4720
4721         my $alternate = 1;
4722         my $patchno = 0;
4723         foreach my $line (@{$difftree}) {
4724                 my $diff = parsed_difftree_line($line);
4725
4726                 if ($alternate) {
4727                         print "<tr class=\"dark\">\n";
4728                 } else {
4729                         print "<tr class=\"light\">\n";
4730                 }
4731                 $alternate ^= 1;
4732
4733                 if (exists $diff->{'nparents'}) { # combined diff
4734
4735                         fill_from_file_info($diff, @parents)
4736                                 unless exists $diff->{'from_file'};
4737
4738                         if (!is_deleted($diff)) {
4739                                 # file exists in the result (child) commit
4740                                 print "<td>" .
4741                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4742                                                              file_name=>$diff->{'to_file'},
4743                                                              hash_base=>$hash),
4744                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4745                                       "</td>\n";
4746                         } else {
4747                                 print "<td>" .
4748                                       esc_path($diff->{'to_file'}) .
4749                                       "</td>\n";
4750                         }
4751
4752                         if ($action eq 'commitdiff') {
4753                                 # link to patch
4754                                 $patchno++;
4755                                 print "<td class=\"link\">" .
4756                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4757                                               "patch") .
4758                                       " | " .
4759                                       "</td>\n";
4760                         }
4761
4762                         my $has_history = 0;
4763                         my $not_deleted = 0;
4764                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4765                                 my $hash_parent = $parents[$i];
4766                                 my $from_hash = $diff->{'from_id'}[$i];
4767                                 my $from_path = $diff->{'from_file'}[$i];
4768                                 my $status = $diff->{'status'}[$i];
4769
4770                                 $has_history ||= ($status ne 'A');
4771                                 $not_deleted ||= ($status ne 'D');
4772
4773                                 if ($status eq 'A') {
4774                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4775                                 } elsif ($status eq 'D') {
4776                                         print "<td class=\"link\">" .
4777                                               $cgi->a({-href => href(action=>"blob",
4778                                                                      hash_base=>$hash,
4779                                                                      hash=>$from_hash,
4780                                                                      file_name=>$from_path)},
4781                                                       "blob" . ($i+1)) .
4782                                               " | </td>\n";
4783                                 } else {
4784                                         if ($diff->{'to_id'} eq $from_hash) {
4785                                                 print "<td class=\"link nochange\">";
4786                                         } else {
4787                                                 print "<td class=\"link\">";
4788                                         }
4789                                         print $cgi->a({-href => href(action=>"blobdiff",
4790                                                                      hash=>$diff->{'to_id'},
4791                                                                      hash_parent=>$from_hash,
4792                                                                      hash_base=>$hash,
4793                                                                      hash_parent_base=>$hash_parent,
4794                                                                      file_name=>$diff->{'to_file'},
4795                                                                      file_parent=>$from_path)},
4796                                                       "diff" . ($i+1)) .
4797                                               " | </td>\n";
4798                                 }
4799                         }
4800
4801                         print "<td class=\"link\">";
4802                         if ($not_deleted) {
4803                                 print $cgi->a({-href => href(action=>"blob",
4804                                                              hash=>$diff->{'to_id'},
4805                                                              file_name=>$diff->{'to_file'},
4806                                                              hash_base=>$hash)},
4807                                               "blob");
4808                                 print " | " if ($has_history);
4809                         }
4810                         if ($has_history) {
4811                                 print $cgi->a({-href => href(action=>"history",
4812                                                              file_name=>$diff->{'to_file'},
4813                                                              hash_base=>$hash)},
4814                                               "history");
4815                         }
4816                         print "</td>\n";
4817
4818                         print "</tr>\n";
4819                         next; # instead of 'else' clause, to avoid extra indent
4820                 }
4821                 # else ordinary diff
4822
4823                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4824                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4825                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4826                         $to_mode_oct = oct $diff->{'to_mode'};
4827                         if (S_ISREG($to_mode_oct)) { # only for regular file
4828                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4829                         }
4830                         $to_file_type = file_type($diff->{'to_mode'});
4831                 }
4832                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4833                         $from_mode_oct = oct $diff->{'from_mode'};
4834                         if (S_ISREG($from_mode_oct)) { # only for regular file
4835                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4836                         }
4837                         $from_file_type = file_type($diff->{'from_mode'});
4838                 }
4839
4840                 if ($diff->{'status'} eq "A") { # created
4841                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4842                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4843                         $mode_chng   .= "]</span>";
4844                         print "<td>";
4845                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4846                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4847                                       -class => "list"}, esc_path($diff->{'file'}));
4848                         print "</td>\n";
4849                         print "<td>$mode_chng</td>\n";
4850                         print "<td class=\"link\">";
4851                         if ($action eq 'commitdiff') {
4852                                 # link to patch
4853                                 $patchno++;
4854                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4855                                               "patch") .
4856                                       " | ";
4857                         }
4858                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4859                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4860                                       "blob");
4861                         print "</td>\n";
4862
4863                 } elsif ($diff->{'status'} eq "D") { # deleted
4864                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4865                         print "<td>";
4866                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4867                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4868                                        -class => "list"}, esc_path($diff->{'file'}));
4869                         print "</td>\n";
4870                         print "<td>$mode_chng</td>\n";
4871                         print "<td class=\"link\">";
4872                         if ($action eq 'commitdiff') {
4873                                 # link to patch
4874                                 $patchno++;
4875                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4876                                               "patch") .
4877                                       " | ";
4878                         }
4879                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4880                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4881                                       "blob") . " | ";
4882                         if ($have_blame) {
4883                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4884                                                              file_name=>$diff->{'file'})},
4885                                               "blame") . " | ";
4886                         }
4887                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4888                                                      file_name=>$diff->{'file'})},
4889                                       "history");
4890                         print "</td>\n";
4891
4892                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4893                         my $mode_chnge = "";
4894                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4895                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4896                                 if ($from_file_type ne $to_file_type) {
4897                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4898                                 }
4899                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4900                                         if ($from_mode_str && $to_mode_str) {
4901                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4902                                         } elsif ($to_mode_str) {
4903                                                 $mode_chnge .= " mode: $to_mode_str";
4904                                         }
4905                                 }
4906                                 $mode_chnge .= "]</span>\n";
4907                         }
4908                         print "<td>";
4909                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4910                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4911                                       -class => "list"}, esc_path($diff->{'file'}));
4912                         print "</td>\n";
4913                         print "<td>$mode_chnge</td>\n";
4914                         print "<td class=\"link\">";
4915                         if ($action eq 'commitdiff') {
4916                                 # link to patch
4917                                 $patchno++;
4918                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4919                                               "patch") .
4920                                       " | ";
4921                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4922                                 # "commit" view and modified file (not onlu mode changed)
4923                                 print $cgi->a({-href => href(action=>"blobdiff",
4924                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4925                                                              hash_base=>$hash, hash_parent_base=>$parent,
4926                                                              file_name=>$diff->{'file'})},
4927                                               "diff") .
4928                                       " | ";
4929                         }
4930                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4931                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4932                                        "blob") . " | ";
4933                         if ($have_blame) {
4934                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4935                                                              file_name=>$diff->{'file'})},
4936                                               "blame") . " | ";
4937                         }
4938                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4939                                                      file_name=>$diff->{'file'})},
4940                                       "history");
4941                         print "</td>\n";
4942
4943                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4944                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4945                         my $nstatus = $status_name{$diff->{'status'}};
4946                         my $mode_chng = "";
4947                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4948                                 # mode also for directories, so we cannot use $to_mode_str
4949                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4950                         }
4951                         print "<td>" .
4952                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4953                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4954                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4955                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4956                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4957                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4958                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4959                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4960                               "<td class=\"link\">";
4961                         if ($action eq 'commitdiff') {
4962                                 # link to patch
4963                                 $patchno++;
4964                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4965                                               "patch") .
4966                                       " | ";
4967                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4968                                 # "commit" view and modified file (not only pure rename or copy)
4969                                 print $cgi->a({-href => href(action=>"blobdiff",
4970                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4971                                                              hash_base=>$hash, hash_parent_base=>$parent,
4972                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4973                                               "diff") .
4974                                       " | ";
4975                         }
4976                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4977                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4978                                       "blob") . " | ";
4979                         if ($have_blame) {
4980                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4981                                                              file_name=>$diff->{'to_file'})},
4982                                               "blame") . " | ";
4983                         }
4984                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4985                                                     file_name=>$diff->{'to_file'})},
4986                                       "history");
4987                         print "</td>\n";
4988
4989                 } # we should not encounter Unmerged (U) or Unknown (X) status
4990                 print "</tr>\n";
4991         }
4992         print "</tbody>" if $has_header;
4993         print "</table>\n";
4994 }
4995
4996 sub print_sidebyside_diff_chunk {
4997         my @chunk = @_;
4998         my (@ctx, @rem, @add);
4999
5000         return unless @chunk;
5001
5002         # incomplete last line might be among removed or added lines,
5003         # or both, or among context lines: find which
5004         for (my $i = 1; $i < @chunk; $i++) {
5005                 if ($chunk[$i][0] eq 'incomplete') {
5006                         $chunk[$i][0] = $chunk[$i-1][0];
5007                 }
5008         }
5009
5010         # guardian
5011         push @chunk, ["", ""];
5012
5013         foreach my $line_info (@chunk) {
5014                 my ($class, $line) = @$line_info;
5015
5016                 # print chunk headers
5017                 if ($class && $class eq 'chunk_header') {
5018                         print $line;
5019                         next;
5020                 }
5021
5022                 ## print from accumulator when type of class of lines change
5023                 # empty contents block on start rem/add block, or end of chunk
5024                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
5025                         print join '',
5026                                 '<div class="chunk_block ctx">',
5027                                         '<div class="old">',
5028                                         @ctx,
5029                                         '</div>',
5030                                         '<div class="new">',
5031                                         @ctx,
5032                                         '</div>',
5033                                 '</div>';
5034                         @ctx = ();
5035                 }
5036                 # empty add/rem block on start context block, or end of chunk
5037                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
5038                         if (!@add) {
5039                                 # pure removal
5040                                 print join '',
5041                                         '<div class="chunk_block rem">',
5042                                                 '<div class="old">',
5043                                                 @rem,
5044                                                 '</div>',
5045                                         '</div>';
5046                         } elsif (!@rem) {
5047                                 # pure addition
5048                                 print join '',
5049                                         '<div class="chunk_block add">',
5050                                                 '<div class="new">',
5051                                                 @add,
5052                                                 '</div>',
5053                                         '</div>';
5054                         } else {
5055                                 # assume that it is change
5056                                 print join '',
5057                                         '<div class="chunk_block chg">',
5058                                                 '<div class="old">',
5059                                                 @rem,
5060                                                 '</div>',
5061                                                 '<div class="new">',
5062                                                 @add,
5063                                                 '</div>',
5064                                         '</div>';
5065                         }
5066                         @rem = @add = ();
5067                 }
5068
5069                 ## adding lines to accumulator
5070                 # guardian value
5071                 last unless $line;
5072                 # rem, add or change
5073                 if ($class eq 'rem') {
5074                         push @rem, $line;
5075                 } elsif ($class eq 'add') {
5076                         push @add, $line;
5077                 }
5078                 # context line
5079                 if ($class eq 'ctx') {
5080                         push @ctx, $line;
5081                 }
5082         }
5083 }
5084
5085 sub git_patchset_body {
5086         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5087         my ($hash_parent) = $hash_parents[0];
5088
5089         my $is_combined = (@hash_parents > 1);
5090         my $patch_idx = 0;
5091         my $patch_number = 0;
5092         my $patch_line;
5093         my $diffinfo;
5094         my $to_name;
5095         my (%from, %to);
5096         my @chunk; # for side-by-side diff
5097
5098         print "<div class=\"patchset\">\n";
5099
5100         # skip to first patch
5101         while ($patch_line = <$fd>) {
5102                 chomp $patch_line;
5103
5104                 last if ($patch_line =~ m/^diff /);
5105         }
5106
5107  PATCH:
5108         while ($patch_line) {
5109
5110                 # parse "git diff" header line
5111                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5112                         # $1 is from_name, which we do not use
5113                         $to_name = unquote($2);
5114                         $to_name =~ s!^b/!!;
5115                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5116                         # $1 is 'cc' or 'combined', which we do not use
5117                         $to_name = unquote($2);
5118                 } else {
5119                         $to_name = undef;
5120                 }
5121
5122                 # check if current patch belong to current raw line
5123                 # and parse raw git-diff line if needed
5124                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5125                         # this is continuation of a split patch
5126                         print "<div class=\"patch cont\">\n";
5127                 } else {
5128                         # advance raw git-diff output if needed
5129                         $patch_idx++ if defined $diffinfo;
5130
5131                         # read and prepare patch information
5132                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5133
5134                         # compact combined diff output can have some patches skipped
5135                         # find which patch (using pathname of result) we are at now;
5136                         if ($is_combined) {
5137                                 while ($to_name ne $diffinfo->{'to_file'}) {
5138                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5139                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5140                                               "</div>\n";  # class="patch"
5141
5142                                         $patch_idx++;
5143                                         $patch_number++;
5144
5145                                         last if $patch_idx > $#$difftree;
5146                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5147                                 }
5148                         }
5149
5150                         # modifies %from, %to hashes
5151                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5152
5153                         # this is first patch for raw difftree line with $patch_idx index
5154                         # we index @$difftree array from 0, but number patches from 1
5155                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5156                 }
5157
5158                 # git diff header
5159                 #assert($patch_line =~ m/^diff /) if DEBUG;
5160                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5161                 $patch_number++;
5162                 # print "git diff" header
5163                 print format_git_diff_header_line($patch_line, $diffinfo,
5164                                                   \%from, \%to);
5165
5166                 # print extended diff header
5167                 print "<div class=\"diff extended_header\">\n";
5168         EXTENDED_HEADER:
5169                 while ($patch_line = <$fd>) {
5170                         chomp $patch_line;
5171
5172                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5173
5174                         print format_extended_diff_header_line($patch_line, $diffinfo,
5175                                                                \%from, \%to);
5176                 }
5177                 print "</div>\n"; # class="diff extended_header"
5178
5179                 # from-file/to-file diff header
5180                 if (! $patch_line) {
5181                         print "</div>\n"; # class="patch"
5182                         last PATCH;
5183                 }
5184                 next PATCH if ($patch_line =~ m/^diff /);
5185                 #assert($patch_line =~ m/^---/) if DEBUG;
5186
5187                 my $last_patch_line = $patch_line;
5188                 $patch_line = <$fd>;
5189                 chomp $patch_line;
5190                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5191
5192                 print format_diff_from_to_header($last_patch_line, $patch_line,
5193                                                  $diffinfo, \%from, \%to,
5194                                                  @hash_parents);
5195
5196                 # the patch itself
5197         LINE:
5198                 while ($patch_line = <$fd>) {
5199                         chomp $patch_line;
5200
5201                         next PATCH if ($patch_line =~ m/^diff /);
5202
5203                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5204                         my $diff_classes = "diff";
5205                         $diff_classes .= " $class" if ($class);
5206                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5207
5208                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5209                                 if ($class eq 'chunk_header') {
5210                                         print_sidebyside_diff_chunk(@chunk);
5211                                         @chunk = ( [ $class, $line ] );
5212                                 } else {
5213                                         push @chunk, [ $class, $line ];
5214                                 }
5215                         } else {
5216                                 # default 'inline' style and unknown styles
5217                                 print $line;
5218                         }
5219                 }
5220
5221         } continue {
5222                 if (@chunk) {
5223                         print_sidebyside_diff_chunk(@chunk);
5224                         @chunk = ();
5225                 }
5226                 print "</div>\n"; # class="patch"
5227         }
5228
5229         # for compact combined (--cc) format, with chunk and patch simplification
5230         # the patchset might be empty, but there might be unprocessed raw lines
5231         for (++$patch_idx if $patch_number > 0;
5232              $patch_idx < @$difftree;
5233              ++$patch_idx) {
5234                 # read and prepare patch information
5235                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5236
5237                 # generate anchor for "patch" links in difftree / whatchanged part
5238                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5239                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5240                       "</div>\n";  # class="patch"
5241
5242                 $patch_number++;
5243         }
5244
5245         if ($patch_number == 0) {
5246                 if (@hash_parents > 1) {
5247                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5248                 } else {
5249                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5250                 }
5251         }
5252
5253         print "</div>\n"; # class="patchset"
5254 }
5255
5256 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5257
5258 sub git_project_search_form {
5259         my ($searchtext, $search_use_regexp) = @_;
5260
5261         my $limit = '';
5262         if ($project_filter) {
5263                 $limit = " in '$project_filter/'";
5264         }
5265
5266         print "<div class=\"projsearch\">\n";
5267         print $cgi->startform(-method => 'get', -action => $my_uri) .
5268               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5269         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5270                 if (defined $project_filter);
5271         print $cgi->textfield(-name => 's', -value => $searchtext,
5272                               -title => "Search project by name and description$limit",
5273                               -size => 60) . "\n" .
5274               "<span title=\"Extended regular expression\">" .
5275               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5276                              -checked => $search_use_regexp) .
5277               "</span>\n" .
5278               $cgi->submit(-name => 'btnS', -value => 'Search') .
5279               $cgi->end_form() . "\n" .
5280               $cgi->a({-href => href(project => undef, searchtext => undef,
5281                                      project_filter => $project_filter)},
5282                       esc_html("List all projects$limit")) . "<br />\n";
5283         print "</div>\n";
5284 }
5285
5286 # entry for given @keys needs filling if at least one of keys in list
5287 # is not present in %$project_info
5288 sub project_info_needs_filling {
5289         my ($project_info, @keys) = @_;
5290
5291         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5292         foreach my $key (@keys) {
5293                 if (!exists $project_info->{$key}) {
5294                         return 1;
5295                 }
5296         }
5297         return;
5298 }
5299
5300 # fills project list info (age, description, owner, category, forks, etc.)
5301 # for each project in the list, removing invalid projects from
5302 # returned list, or fill only specified info.
5303 #
5304 # Invalid projects are removed from the returned list if and only if you
5305 # ask 'age' or 'age_string' to be filled, because they are the only fields
5306 # that run unconditionally git command that requires repository, and
5307 # therefore do always check if project repository is invalid.
5308 #
5309 # USAGE:
5310 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5311 #   ensures that 'descr_long' and 'ctags' fields are filled
5312 # * @project_list = fill_project_list_info(\@project_list)
5313 #   ensures that all fields are filled (and invalid projects removed)
5314 #
5315 # NOTE: modifies $projlist, but does not remove entries from it
5316 sub fill_project_list_info {
5317         my ($projlist, @wanted_keys) = @_;
5318         my @projects;
5319         my $filter_set = sub { return @_; };
5320         if (@wanted_keys) {
5321                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5322                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5323         }
5324
5325         my $show_ctags = gitweb_check_feature('ctags');
5326  PROJECT:
5327         foreach my $pr (@$projlist) {
5328                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5329                         my (@activity) = git_get_last_activity($pr->{'path'});
5330                         unless (@activity) {
5331                                 next PROJECT;
5332                         }
5333                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5334                 }
5335                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5336                         my $descr = git_get_project_description($pr->{'path'}) || "";
5337                         $descr = to_utf8($descr);
5338                         $pr->{'descr_long'} = $descr;
5339                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5340                 }
5341                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5342                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5343                 }
5344                 if ($show_ctags &&
5345                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5346                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5347                 }
5348                 if ($projects_list_group_categories &&
5349                     project_info_needs_filling($pr, $filter_set->('category'))) {
5350                         my $cat = git_get_project_category($pr->{'path'}) ||
5351                                                            $project_list_default_category;
5352                         $pr->{'category'} = to_utf8($cat);
5353                 }
5354
5355                 push @projects, $pr;
5356         }
5357
5358         return @projects;
5359 }
5360
5361 sub sort_projects_list {
5362         my ($projlist, $order) = @_;
5363         my @projects;
5364
5365         my %order_info = (
5366                 project => { key => 'path', type => 'str' },
5367                 descr => { key => 'descr_long', type => 'str' },
5368                 owner => { key => 'owner', type => 'str' },
5369                 age => { key => 'age', type => 'num' }
5370         );
5371         my $oi = $order_info{$order};
5372         return @$projlist unless defined $oi;
5373         if ($oi->{'type'} eq 'str') {
5374                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5375         } else {
5376                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5377         }
5378
5379         return @projects;
5380 }
5381
5382 # returns a hash of categories, containing the list of project
5383 # belonging to each category
5384 sub build_projlist_by_category {
5385         my ($projlist, $from, $to) = @_;
5386         my %categories;
5387
5388         $from = 0 unless defined $from;
5389         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5390
5391         for (my $i = $from; $i <= $to; $i++) {
5392                 my $pr = $projlist->[$i];
5393                 push @{$categories{ $pr->{'category'} }}, $pr;
5394         }
5395
5396         return wantarray ? %categories : \%categories;
5397 }
5398
5399 # print 'sort by' <th> element, generating 'sort by $name' replay link
5400 # if that order is not selected
5401 sub print_sort_th {
5402         print format_sort_th(@_);
5403 }
5404
5405 sub format_sort_th {
5406         my ($name, $order, $header) = @_;
5407         my $sort_th = "";
5408         $header ||= ucfirst($name);
5409
5410         if ($order eq $name) {
5411                 $sort_th .= "<th>$header</th>\n";
5412         } else {
5413                 $sort_th .= "<th>" .
5414                             $cgi->a({-href => href(-replay=>1, order=>$name),
5415                                      -class => "header"}, $header) .
5416                             "</th>\n";
5417         }
5418
5419         return $sort_th;
5420 }
5421
5422 sub git_project_list_rows {
5423         my ($projlist, $from, $to, $check_forks) = @_;
5424
5425         $from = 0 unless defined $from;
5426         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5427
5428         my $alternate = 1;
5429         for (my $i = $from; $i <= $to; $i++) {
5430                 my $pr = $projlist->[$i];
5431
5432                 if ($alternate) {
5433                         print "<tr class=\"dark\">\n";
5434                 } else {
5435                         print "<tr class=\"light\">\n";
5436                 }
5437                 $alternate ^= 1;
5438
5439                 if ($check_forks) {
5440                         print "<td>";
5441                         if ($pr->{'forks'}) {
5442                                 my $nforks = scalar @{$pr->{'forks'}};
5443                                 if ($nforks > 0) {
5444                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5445                                                        -title => "$nforks forks"}, "+");
5446                                 } else {
5447                                         print $cgi->span({-title => "$nforks forks"}, "+");
5448                                 }
5449                         }
5450                         print "</td>\n";
5451                 }
5452                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5453                                         -class => "list"},
5454                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5455                       "</td>\n" .
5456                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5457                                         -class => "list",
5458                                         -title => $pr->{'descr_long'}},
5459                                         $search_regexp
5460                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5461                                                                     $pr->{'descr'}, $search_regexp)
5462                                         : esc_html($pr->{'descr'})) .
5463                       "</td>\n" .
5464                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5465                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5466                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5467                       "<td class=\"link\">" .
5468                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5469                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5470                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5471                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5472                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5473                       "</td>\n" .
5474                       "</tr>\n";
5475         }
5476 }
5477
5478 sub git_project_list_body {
5479         # actually uses global variable $project
5480         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5481         my @projects = @$projlist;
5482
5483         my $check_forks = gitweb_check_feature('forks');
5484         my $show_ctags  = gitweb_check_feature('ctags');
5485         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5486         $check_forks = undef
5487                 if ($tagfilter || $search_regexp);
5488
5489         # filtering out forks before filling info allows to do less work
5490         @projects = filter_forks_from_projects_list(\@projects)
5491                 if ($check_forks);
5492         # search_projects_list pre-fills required info
5493         @projects = search_projects_list(\@projects,
5494                                          'search_regexp' => $search_regexp,
5495                                          'tagfilter'  => $tagfilter)
5496                 if ($tagfilter || $search_regexp);
5497         # fill the rest
5498         @projects = fill_project_list_info(\@projects);
5499
5500         $order ||= $default_projects_order;
5501         $from = 0 unless defined $from;
5502         $to = $#projects if (!defined $to || $#projects < $to);
5503
5504         # short circuit
5505         if ($from > $to) {
5506                 print "<center>\n".
5507                       "<b>No such projects found</b><br />\n".
5508                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5509                       "</center>\n<br />\n";
5510                 return;
5511         }
5512
5513         @projects = sort_projects_list(\@projects, $order);
5514
5515         if ($show_ctags) {
5516                 my $ctags = git_gather_all_ctags(\@projects);
5517                 my $cloud = git_populate_project_tagcloud($ctags);
5518                 print git_show_project_tagcloud($cloud, 64);
5519         }
5520
5521         print "<table class=\"project_list\">\n";
5522         unless ($no_header) {
5523                 print "<tr>\n";
5524                 if ($check_forks) {
5525                         print "<th></th>\n";
5526                 }
5527                 print_sort_th('project', $order, 'Project');
5528                 print_sort_th('descr', $order, 'Description');
5529                 print_sort_th('owner', $order, 'Owner');
5530                 print_sort_th('age', $order, 'Last Change');
5531                 print "<th></th>\n" . # for links
5532                       "</tr>\n";
5533         }
5534
5535         if ($projects_list_group_categories) {
5536                 # only display categories with projects in the $from-$to window
5537                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5538                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5539                 foreach my $cat (sort keys %categories) {
5540                         unless ($cat eq "") {
5541                                 print "<tr>\n";
5542                                 if ($check_forks) {
5543                                         print "<td></td>\n";
5544                                 }
5545                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5546                                 print "</tr>\n";
5547                         }
5548
5549                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5550                 }
5551         } else {
5552                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5553         }
5554
5555         if (defined $extra) {
5556                 print "<tr>\n";
5557                 if ($check_forks) {
5558                         print "<td></td>\n";
5559                 }
5560                 print "<td colspan=\"5\">$extra</td>\n" .
5561                       "</tr>\n";
5562         }
5563         print "</table>\n";
5564 }
5565
5566 sub git_log_body {
5567         # uses global variable $project
5568         my ($commitlist, $from, $to, $refs, $extra) = @_;
5569
5570         $from = 0 unless defined $from;
5571         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5572
5573         for (my $i = 0; $i <= $to; $i++) {
5574                 my %co = %{$commitlist->[$i]};
5575                 next if !%co;
5576                 my $commit = $co{'id'};
5577                 my $ref = format_ref_marker($refs, $commit);
5578                 git_print_header_div('commit',
5579                                "<span class=\"age\">$co{'age_string'}</span>" .
5580                                esc_html($co{'title'}) . $ref,
5581                                $commit);
5582                 print "<div class=\"title_text\">\n" .
5583                       "<div class=\"log_link\">\n" .
5584                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5585                       " | " .
5586                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5587                       " | " .
5588                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5589                       "<br/>\n" .
5590                       "</div>\n";
5591                       git_print_authorship(\%co, -tag => 'span');
5592                       print "<br/>\n</div>\n";
5593
5594                 print "<div class=\"log_body\">\n";
5595                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5596                 print "</div>\n";
5597         }
5598         if ($extra) {
5599                 print "<div class=\"page_nav\">\n";
5600                 print "$extra\n";
5601                 print "</div>\n";
5602         }
5603 }
5604
5605 sub git_shortlog_body {
5606         # uses global variable $project
5607         my ($commitlist, $from, $to, $refs, $extra) = @_;
5608
5609         $from = 0 unless defined $from;
5610         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5611
5612         print "<table class=\"shortlog\">\n";
5613         my $alternate = 1;
5614         for (my $i = $from; $i <= $to; $i++) {
5615                 my %co = %{$commitlist->[$i]};
5616                 my $commit = $co{'id'};
5617                 my $ref = format_ref_marker($refs, $commit);
5618                 if ($alternate) {
5619                         print "<tr class=\"dark\">\n";
5620                 } else {
5621                         print "<tr class=\"light\">\n";
5622                 }
5623                 $alternate ^= 1;
5624                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5625                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5626                       format_author_html('td', \%co, 10) . "<td>";
5627                 print format_subject_html($co{'title'}, $co{'title_short'},
5628                                           href(action=>"commit", hash=>$commit), $ref);
5629                 print "</td>\n" .
5630                       "<td class=\"link\">" .
5631                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5632                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5633                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5634                 my $snapshot_links = format_snapshot_links($commit);
5635                 if (defined $snapshot_links) {
5636                         print " | " . $snapshot_links;
5637                 }
5638                 print "</td>\n" .
5639                       "</tr>\n";
5640         }
5641         if (defined $extra) {
5642                 print "<tr>\n" .
5643                       "<td colspan=\"4\">$extra</td>\n" .
5644                       "</tr>\n";
5645         }
5646         print "</table>\n";
5647 }
5648
5649 sub git_history_body {
5650         # Warning: assumes constant type (blob or tree) during history
5651         my ($commitlist, $from, $to, $refs, $extra,
5652             $file_name, $file_hash, $ftype) = @_;
5653
5654         $from = 0 unless defined $from;
5655         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5656
5657         print "<table class=\"history\">\n";
5658         my $alternate = 1;
5659         for (my $i = $from; $i <= $to; $i++) {
5660                 my %co = %{$commitlist->[$i]};
5661                 if (!%co) {
5662                         next;
5663                 }
5664                 my $commit = $co{'id'};
5665
5666                 my $ref = format_ref_marker($refs, $commit);
5667
5668                 if ($alternate) {
5669                         print "<tr class=\"dark\">\n";
5670                 } else {
5671                         print "<tr class=\"light\">\n";
5672                 }
5673                 $alternate ^= 1;
5674                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5675         # shortlog:   format_author_html('td', \%co, 10)
5676                       format_author_html('td', \%co, 15, 3) . "<td>";
5677                 # originally git_history used chop_str($co{'title'}, 50)
5678                 print format_subject_html($co{'title'}, $co{'title_short'},
5679                                           href(action=>"commit", hash=>$commit), $ref);
5680                 print "</td>\n" .
5681                       "<td class=\"link\">" .
5682                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5683                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5684
5685                 if ($ftype eq 'blob') {
5686                         my $blob_current = $file_hash;
5687                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5688                         if (defined $blob_current && defined $blob_parent &&
5689                                         $blob_current ne $blob_parent) {
5690                                 print " | " .
5691                                         $cgi->a({-href => href(action=>"blobdiff",
5692                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5693                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5694                                                                file_name=>$file_name)},
5695                                                 "diff to current");
5696                         }
5697                 }
5698                 print "</td>\n" .
5699                       "</tr>\n";
5700         }
5701         if (defined $extra) {
5702                 print "<tr>\n" .
5703                       "<td colspan=\"4\">$extra</td>\n" .
5704                       "</tr>\n";
5705         }
5706         print "</table>\n";
5707 }
5708
5709 sub git_tags_body {
5710         # uses global variable $project
5711         my ($taglist, $from, $to, $extra) = @_;
5712         $from = 0 unless defined $from;
5713         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5714
5715         print "<table class=\"tags\">\n";
5716         my $alternate = 1;
5717         for (my $i = $from; $i <= $to; $i++) {
5718                 my $entry = $taglist->[$i];
5719                 my %tag = %$entry;
5720                 my $comment = $tag{'subject'};
5721                 my $comment_short;
5722                 if (defined $comment) {
5723                         $comment_short = chop_str($comment, 30, 5);
5724                 }
5725                 if ($alternate) {
5726                         print "<tr class=\"dark\">\n";
5727                 } else {
5728                         print "<tr class=\"light\">\n";
5729                 }
5730                 $alternate ^= 1;
5731                 if (defined $tag{'age'}) {
5732                         print "<td><i>$tag{'age'}</i></td>\n";
5733                 } else {
5734                         print "<td></td>\n";
5735                 }
5736                 print "<td>" .
5737                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5738                                -class => "list name"}, esc_html($tag{'name'})) .
5739                       "</td>\n" .
5740                       "<td>";
5741                 if (defined $comment) {
5742                         print format_subject_html($comment, $comment_short,
5743                                                   href(action=>"tag", hash=>$tag{'id'}));
5744                 }
5745                 print "</td>\n" .
5746                       "<td class=\"selflink\">";
5747                 if ($tag{'type'} eq "tag") {
5748                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5749                 } else {
5750                         print "&nbsp;";
5751                 }
5752                 print "</td>\n" .
5753                       "<td class=\"link\">" . " | " .
5754                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5755                 if ($tag{'reftype'} eq "commit") {
5756                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5757                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5758                 } elsif ($tag{'reftype'} eq "blob") {
5759                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5760                 }
5761                 print "</td>\n" .
5762                       "</tr>";
5763         }
5764         if (defined $extra) {
5765                 print "<tr>\n" .
5766                       "<td colspan=\"5\">$extra</td>\n" .
5767                       "</tr>\n";
5768         }
5769         print "</table>\n";
5770 }
5771
5772 sub git_heads_body {
5773         # uses global variable $project
5774         my ($headlist, $head_at, $from, $to, $extra) = @_;
5775         $from = 0 unless defined $from;
5776         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5777
5778         print "<table class=\"heads\">\n";
5779         my $alternate = 1;
5780         for (my $i = $from; $i <= $to; $i++) {
5781                 my $entry = $headlist->[$i];
5782                 my %ref = %$entry;
5783                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5784                 if ($alternate) {
5785                         print "<tr class=\"dark\">\n";
5786                 } else {
5787                         print "<tr class=\"light\">\n";
5788                 }
5789                 $alternate ^= 1;
5790                 print "<td><i>$ref{'age'}</i></td>\n" .
5791                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5792                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5793                                -class => "list name"},esc_html($ref{'name'})) .
5794                       "</td>\n" .
5795                       "<td class=\"link\">" .
5796                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5797                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5798                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5799                       "</td>\n" .
5800                       "</tr>";
5801         }
5802         if (defined $extra) {
5803                 print "<tr>\n" .
5804                       "<td colspan=\"3\">$extra</td>\n" .
5805                       "</tr>\n";
5806         }
5807         print "</table>\n";
5808 }
5809
5810 # Display a single remote block
5811 sub git_remote_block {
5812         my ($remote, $rdata, $limit, $head) = @_;
5813
5814         my $heads = $rdata->{'heads'};
5815         my $fetch = $rdata->{'fetch'};
5816         my $push = $rdata->{'push'};
5817
5818         my $urls_table = "<table class=\"projects_list\">\n" ;
5819
5820         if (defined $fetch) {
5821                 if ($fetch eq $push) {
5822                         $urls_table .= format_repo_url("URL", $fetch);
5823                 } else {
5824                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5825                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5826                 }
5827         } elsif (defined $push) {
5828                 $urls_table .= format_repo_url("Push URL", $push);
5829         } else {
5830                 $urls_table .= format_repo_url("", "No remote URL");
5831         }
5832
5833         $urls_table .= "</table>\n";
5834
5835         my $dots;
5836         if (defined $limit && $limit < @$heads) {
5837                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5838         }
5839
5840         print $urls_table;
5841         git_heads_body($heads, $head, 0, $limit, $dots);
5842 }
5843
5844 # Display a list of remote names with the respective fetch and push URLs
5845 sub git_remotes_list {
5846         my ($remotedata, $limit) = @_;
5847         print "<table class=\"heads\">\n";
5848         my $alternate = 1;
5849         my @remotes = sort keys %$remotedata;
5850
5851         my $limited = $limit && $limit < @remotes;
5852
5853         $#remotes = $limit - 1 if $limited;
5854
5855         while (my $remote = shift @remotes) {
5856                 my $rdata = $remotedata->{$remote};
5857                 my $fetch = $rdata->{'fetch'};
5858                 my $push = $rdata->{'push'};
5859                 if ($alternate) {
5860                         print "<tr class=\"dark\">\n";
5861                 } else {
5862                         print "<tr class=\"light\">\n";
5863                 }
5864                 $alternate ^= 1;
5865                 print "<td>" .
5866                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5867                                -class=> "list name"},esc_html($remote)) .
5868                       "</td>";
5869                 print "<td class=\"link\">" .
5870                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5871                       " | " .
5872                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5873                       "</td>";
5874
5875                 print "</tr>\n";
5876         }
5877
5878         if ($limited) {
5879                 print "<tr>\n" .
5880                       "<td colspan=\"3\">" .
5881                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5882                       "</td>\n" . "</tr>\n";
5883         }
5884
5885         print "</table>";
5886 }
5887
5888 # Display remote heads grouped by remote, unless there are too many
5889 # remotes, in which case we only display the remote names
5890 sub git_remotes_body {
5891         my ($remotedata, $limit, $head) = @_;
5892         if ($limit and $limit < keys %$remotedata) {
5893                 git_remotes_list($remotedata, $limit);
5894         } else {
5895                 fill_remote_heads($remotedata);
5896                 while (my ($remote, $rdata) = each %$remotedata) {
5897                         git_print_section({-class=>"remote", -id=>$remote},
5898                                 ["remotes", $remote, $remote], sub {
5899                                         git_remote_block($remote, $rdata, $limit, $head);
5900                                 });
5901                 }
5902         }
5903 }
5904
5905 sub git_search_message {
5906         my %co = @_;
5907
5908         my $greptype;
5909         if ($searchtype eq 'commit') {
5910                 $greptype = "--grep=";
5911         } elsif ($searchtype eq 'author') {
5912                 $greptype = "--author=";
5913         } elsif ($searchtype eq 'committer') {
5914                 $greptype = "--committer=";
5915         }
5916         $greptype .= $searchtext;
5917         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5918                                        $greptype, '--regexp-ignore-case',
5919                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5920
5921         my $paging_nav = '';
5922         if ($page > 0) {
5923                 $paging_nav .=
5924                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5925                                 "first") .
5926                         " &sdot; " .
5927                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5928                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5929         } else {
5930                 $paging_nav .= "first &sdot; prev";
5931         }
5932         my $next_link = '';
5933         if ($#commitlist >= 100) {
5934                 $next_link =
5935                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5936                                  -accesskey => "n", -title => "Alt-n"}, "next");
5937                 $paging_nav .= " &sdot; $next_link";
5938         } else {
5939                 $paging_nav .= " &sdot; next";
5940         }
5941
5942         git_header_html();
5943
5944         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5945         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5946         if ($page == 0 && !@commitlist) {
5947                 print "<p>No match.</p>\n";
5948         } else {
5949                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5950         }
5951
5952         git_footer_html();
5953 }
5954
5955 sub git_search_changes {
5956         my %co = @_;
5957
5958         local $/ = "\n";
5959         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5960                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5961                 ($search_use_regexp ? '--pickaxe-regex' : ())
5962                         or die_error(500, "Open git-log failed");
5963
5964         git_header_html();
5965
5966         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5967         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5968
5969         print "<table class=\"pickaxe search\">\n";
5970         my $alternate = 1;
5971         undef %co;
5972         my @files;
5973         while (my $line = <$fd>) {
5974                 chomp $line;
5975                 next unless $line;
5976
5977                 my %set = parse_difftree_raw_line($line);
5978                 if (defined $set{'commit'}) {
5979                         # finish previous commit
5980                         if (%co) {
5981                                 print "</td>\n" .
5982                                       "<td class=\"link\">" .
5983                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5984                                               "commit") .
5985                                       " | " .
5986                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5987                                                              hash_base=>$co{'id'})},
5988                                               "tree") .
5989                                       "</td>\n" .
5990                                       "</tr>\n";
5991                         }
5992
5993                         if ($alternate) {
5994                                 print "<tr class=\"dark\">\n";
5995                         } else {
5996                                 print "<tr class=\"light\">\n";
5997                         }
5998                         $alternate ^= 1;
5999                         %co = parse_commit($set{'commit'});
6000                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6001                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6002                               "<td><i>$author</i></td>\n" .
6003                               "<td>" .
6004                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6005                                       -class => "list subject"},
6006                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6007                 } elsif (defined $set{'to_id'}) {
6008                         next if ($set{'to_id'} =~ m/^0{40}$/);
6009
6010                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6011                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6012                                       -class => "list"},
6013                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6014                               "<br/>\n";
6015                 }
6016         }
6017         close $fd;
6018
6019         # finish last commit (warning: repetition!)
6020         if (%co) {
6021                 print "</td>\n" .
6022                       "<td class=\"link\">" .
6023                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6024                               "commit") .
6025                       " | " .
6026                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6027                                              hash_base=>$co{'id'})},
6028                               "tree") .
6029                       "</td>\n" .
6030                       "</tr>\n";
6031         }
6032
6033         print "</table>\n";
6034
6035         git_footer_html();
6036 }
6037
6038 sub git_search_files {
6039         my %co = @_;
6040
6041         local $/ = "\n";
6042         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6043                 $search_use_regexp ? ('-E', '-i') : '-F',
6044                 $searchtext, $co{'tree'}
6045                         or die_error(500, "Open git-grep failed");
6046
6047         git_header_html();
6048
6049         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6050         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6051
6052         print "<table class=\"grep_search\">\n";
6053         my $alternate = 1;
6054         my $matches = 0;
6055         my $lastfile = '';
6056         my $file_href;
6057         while (my $line = <$fd>) {
6058                 chomp $line;
6059                 my ($file, $lno, $ltext, $binary);
6060                 last if ($matches++ > 1000);
6061                 if ($line =~ /^Binary file (.+) matches$/) {
6062                         $file = $1;
6063                         $binary = 1;
6064                 } else {
6065                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6066                         $file =~ s/^$co{'tree'}://;
6067                 }
6068                 if ($file ne $lastfile) {
6069                         $lastfile and print "</td></tr>\n";
6070                         if ($alternate++) {
6071                                 print "<tr class=\"dark\">\n";
6072                         } else {
6073                                 print "<tr class=\"light\">\n";
6074                         }
6075                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6076                                           file_name=>$file);
6077                         print "<td class=\"list\">".
6078                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6079                         print "</td><td>\n";
6080                         $lastfile = $file;
6081                 }
6082                 if ($binary) {
6083                         print "<div class=\"binary\">Binary file</div>\n";
6084                 } else {
6085                         $ltext = untabify($ltext);
6086                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6087                                 $ltext = esc_html($1, -nbsp=>1);
6088                                 $ltext .= '<span class="match">';
6089                                 $ltext .= esc_html($2, -nbsp=>1);
6090                                 $ltext .= '</span>';
6091                                 $ltext .= esc_html($3, -nbsp=>1);
6092                         } else {
6093                                 $ltext = esc_html($ltext, -nbsp=>1);
6094                         }
6095                         print "<div class=\"pre\">" .
6096                                 $cgi->a({-href => $file_href.'#l'.$lno,
6097                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6098                                 ' ' .  $ltext . "</div>\n";
6099                 }
6100         }
6101         if ($lastfile) {
6102                 print "</td></tr>\n";
6103                 if ($matches > 1000) {
6104                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6105                 }
6106         } else {
6107                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6108         }
6109         close $fd;
6110
6111         print "</table>\n";
6112
6113         git_footer_html();
6114 }
6115
6116 sub git_search_grep_body {
6117         my ($commitlist, $from, $to, $extra) = @_;
6118         $from = 0 unless defined $from;
6119         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6120
6121         print "<table class=\"commit_search\">\n";
6122         my $alternate = 1;
6123         for (my $i = $from; $i <= $to; $i++) {
6124                 my %co = %{$commitlist->[$i]};
6125                 if (!%co) {
6126                         next;
6127                 }
6128                 my $commit = $co{'id'};
6129                 if ($alternate) {
6130                         print "<tr class=\"dark\">\n";
6131                 } else {
6132                         print "<tr class=\"light\">\n";
6133                 }
6134                 $alternate ^= 1;
6135                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6136                       format_author_html('td', \%co, 15, 5) .
6137                       "<td>" .
6138                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6139                                -class => "list subject"},
6140                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6141                 my $comment = $co{'comment'};
6142                 foreach my $line (@$comment) {
6143                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6144                                 my ($lead, $match, $trail) = ($1, $2, $3);
6145                                 $match = chop_str($match, 70, 5, 'center');
6146                                 my $contextlen = int((80 - length($match))/2);
6147                                 $contextlen = 30 if ($contextlen > 30);
6148                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6149                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6150
6151                                 $lead  = esc_html($lead);
6152                                 $match = esc_html($match);
6153                                 $trail = esc_html($trail);
6154
6155                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6156                         }
6157                 }
6158                 print "</td>\n" .
6159                       "<td class=\"link\">" .
6160                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6161                       " | " .
6162                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6163                       " | " .
6164                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6165                 print "</td>\n" .
6166                       "</tr>\n";
6167         }
6168         if (defined $extra) {
6169                 print "<tr>\n" .
6170                       "<td colspan=\"3\">$extra</td>\n" .
6171                       "</tr>\n";
6172         }
6173         print "</table>\n";
6174 }
6175
6176 ## ======================================================================
6177 ## ======================================================================
6178 ## actions
6179
6180 sub git_project_list {
6181         my $order = $input_params{'order'};
6182         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6183                 die_error(400, "Unknown order parameter");
6184         }
6185
6186         my @list = git_get_projects_list($project_filter, $strict_export);
6187         if (!@list) {
6188                 die_error(404, "No projects found");
6189         }
6190
6191         git_header_html();
6192         if (defined $home_text && -f $home_text) {
6193                 print "<div class=\"index_include\">\n";
6194                 insert_file($home_text);
6195                 print "</div>\n";
6196         }
6197
6198         git_project_search_form($searchtext, $search_use_regexp);
6199         git_project_list_body(\@list, $order);
6200         git_footer_html();
6201 }
6202
6203 sub git_forks {
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 $filter = $project;
6210         $filter =~ s/\.git$//;
6211         my @list = git_get_projects_list($filter);
6212         if (!@list) {
6213                 die_error(404, "No forks found");
6214         }
6215
6216         git_header_html();
6217         git_print_page_nav('','');
6218         git_print_header_div('summary', "$project forks");
6219         git_project_list_body(\@list, $order);
6220         git_footer_html();
6221 }
6222
6223 sub git_project_index {
6224         my @projects = git_get_projects_list($project_filter, $strict_export);
6225         if (!@projects) {
6226                 die_error(404, "No projects found");
6227         }
6228
6229         print $cgi->header(
6230                 -type => 'text/plain',
6231                 -charset => 'utf-8',
6232                 -content_disposition => 'inline; filename="index.aux"');
6233
6234         foreach my $pr (@projects) {
6235                 if (!exists $pr->{'owner'}) {
6236                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6237                 }
6238
6239                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6240                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6241                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6242                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6243                 $path  =~ s/ /\+/g;
6244                 $owner =~ s/ /\+/g;
6245
6246                 print "$path $owner\n";
6247         }
6248 }
6249
6250 sub git_summary {
6251         my $descr = git_get_project_description($project) || "none";
6252         my %co = parse_commit("HEAD");
6253         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6254         my $head = $co{'id'};
6255         my $remote_heads = gitweb_check_feature('remote_heads');
6256
6257         my $owner = git_get_project_owner($project);
6258
6259         my $refs = git_get_references();
6260         # These get_*_list functions return one more to allow us to see if
6261         # there are more ...
6262         my @taglist  = git_get_tags_list(16);
6263         my @headlist = git_get_heads_list(16);
6264         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6265         my @forklist;
6266         my $check_forks = gitweb_check_feature('forks');
6267
6268         if ($check_forks) {
6269                 # find forks of a project
6270                 my $filter = $project;
6271                 $filter =~ s/\.git$//;
6272                 @forklist = git_get_projects_list($filter);
6273                 # filter out forks of forks
6274                 @forklist = filter_forks_from_projects_list(\@forklist)
6275                         if (@forklist);
6276         }
6277
6278         git_header_html();
6279         git_print_page_nav('summary','', $head);
6280
6281         print "<div class=\"title\">&nbsp;</div>\n";
6282         print "<table class=\"projects_list\">\n" .
6283               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6284               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6285         if (defined $cd{'rfc2822'}) {
6286                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6287                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6288         }
6289
6290         # use per project git URL list in $projectroot/$project/cloneurl
6291         # or make project git URL from git base URL and project name
6292         my $url_tag = "URL";
6293         my @url_list = git_get_project_url_list($project);
6294         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6295         foreach my $git_url (@url_list) {
6296                 next unless $git_url;
6297                 print format_repo_url($url_tag, $git_url);
6298                 $url_tag = "";
6299         }
6300
6301         # Tag cloud
6302         my $show_ctags = gitweb_check_feature('ctags');
6303         if ($show_ctags) {
6304                 my $ctags = git_get_project_ctags($project);
6305                 if (%$ctags) {
6306                         # without ability to add tags, don't show if there are none
6307                         my $cloud = git_populate_project_tagcloud($ctags);
6308                         print "<tr id=\"metadata_ctags\">" .
6309                               "<td>content tags</td>" .
6310                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6311                               "</tr>\n";
6312                 }
6313         }
6314
6315         print "</table>\n";
6316
6317         # If XSS prevention is on, we don't include README.html.
6318         # TODO: Allow a readme in some safe format.
6319         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6320                 print "<div class=\"title\">readme</div>\n" .
6321                       "<div class=\"readme\">\n";
6322                 insert_file("$projectroot/$project/README.html");
6323                 print "\n</div>\n"; # class="readme"
6324         }
6325
6326         # we need to request one more than 16 (0..15) to check if
6327         # those 16 are all
6328         my @commitlist = $head ? parse_commits($head, 17) : ();
6329         if (@commitlist) {
6330                 git_print_header_div('shortlog');
6331                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6332                                   $#commitlist <=  15 ? undef :
6333                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6334         }
6335
6336         if (@taglist) {
6337                 git_print_header_div('tags');
6338                 git_tags_body(\@taglist, 0, 15,
6339                               $#taglist <=  15 ? undef :
6340                               $cgi->a({-href => href(action=>"tags")}, "..."));
6341         }
6342
6343         if (@headlist) {
6344                 git_print_header_div('heads');
6345                 git_heads_body(\@headlist, $head, 0, 15,
6346                                $#headlist <= 15 ? undef :
6347                                $cgi->a({-href => href(action=>"heads")}, "..."));
6348         }
6349
6350         if (%remotedata) {
6351                 git_print_header_div('remotes');
6352                 git_remotes_body(\%remotedata, 15, $head);
6353         }
6354
6355         if (@forklist) {
6356                 git_print_header_div('forks');
6357                 git_project_list_body(\@forklist, 'age', 0, 15,
6358                                       $#forklist <= 15 ? undef :
6359                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6360                                       'no_header');
6361         }
6362
6363         git_footer_html();
6364 }
6365
6366 sub git_tag {
6367         my %tag = parse_tag($hash);
6368
6369         if (! %tag) {
6370                 die_error(404, "Unknown tag object");
6371         }
6372
6373         my $head = git_get_head_hash($project);
6374         git_header_html();
6375         git_print_page_nav('','', $head,undef,$head);
6376         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6377         print "<div class=\"title_text\">\n" .
6378               "<table class=\"object_header\">\n" .
6379               "<tr>\n" .
6380               "<td>object</td>\n" .
6381               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6382                                $tag{'object'}) . "</td>\n" .
6383               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6384                                               $tag{'type'}) . "</td>\n" .
6385               "</tr>\n";
6386         if (defined($tag{'author'})) {
6387                 git_print_authorship_rows(\%tag, 'author');
6388         }
6389         print "</table>\n\n" .
6390               "</div>\n";
6391         print "<div class=\"page_body\">";
6392         my $comment = $tag{'comment'};
6393         foreach my $line (@$comment) {
6394                 chomp $line;
6395                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6396         }
6397         print "</div>\n";
6398         git_footer_html();
6399 }
6400
6401 sub git_blame_common {
6402         my $format = shift || 'porcelain';
6403         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6404                 $format = 'incremental';
6405                 $action = 'blame_incremental'; # for page title etc
6406         }
6407
6408         # permissions
6409         gitweb_check_feature('blame')
6410                 or die_error(403, "Blame view not allowed");
6411
6412         # error checking
6413         die_error(400, "No file name given") unless $file_name;
6414         $hash_base ||= git_get_head_hash($project);
6415         die_error(404, "Couldn't find base commit") unless $hash_base;
6416         my %co = parse_commit($hash_base)
6417                 or die_error(404, "Commit not found");
6418         my $ftype = "blob";
6419         if (!defined $hash) {
6420                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6421                         or die_error(404, "Error looking up file");
6422         } else {
6423                 $ftype = git_get_type($hash);
6424                 if ($ftype !~ "blob") {
6425                         die_error(400, "Object is not a blob");
6426                 }
6427         }
6428
6429         my $fd;
6430         if ($format eq 'incremental') {
6431                 # get file contents (as base)
6432                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6433                         or die_error(500, "Open git-cat-file failed");
6434         } elsif ($format eq 'data') {
6435                 # run git-blame --incremental
6436                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6437                         $hash_base, "--", $file_name
6438                         or die_error(500, "Open git-blame --incremental failed");
6439         } else {
6440                 # run git-blame --porcelain
6441                 open $fd, "-|", git_cmd(), "blame", '-p',
6442                         $hash_base, '--', $file_name
6443                         or die_error(500, "Open git-blame --porcelain failed");
6444         }
6445
6446         # incremental blame data returns early
6447         if ($format eq 'data') {
6448                 print $cgi->header(
6449                         -type=>"text/plain", -charset => "utf-8",
6450                         -status=> "200 OK");
6451                 local $| = 1; # output autoflush
6452                 while (my $line = <$fd>) {
6453                         print to_utf8($line);
6454                 }
6455                 close $fd
6456                         or print "ERROR $!\n";
6457
6458                 print 'END';
6459                 if (defined $t0 && gitweb_check_feature('timed')) {
6460                         print ' '.
6461                               tv_interval($t0, [ gettimeofday() ]).
6462                               ' '.$number_of_git_cmds;
6463                 }
6464                 print "\n";
6465
6466                 return;
6467         }
6468
6469         # page header
6470         git_header_html();
6471         my $formats_nav =
6472                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6473                         "blob") .
6474                 " | ";
6475         if ($format eq 'incremental') {
6476                 $formats_nav .=
6477                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6478                                 "blame") . " (non-incremental)";
6479         } else {
6480                 $formats_nav .=
6481                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6482                                 "blame") . " (incremental)";
6483         }
6484         $formats_nav .=
6485                 " | " .
6486                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6487                         "history") .
6488                 " | " .
6489                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6490                         "HEAD");
6491         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6492         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6493         git_print_page_path($file_name, $ftype, $hash_base);
6494
6495         # page body
6496         if ($format eq 'incremental') {
6497                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6498                       "This page requires JavaScript to run.\n Use ".
6499                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6500                               'this page').
6501                       " instead.\n".
6502                       "</b></center></div>\n</noscript>\n";
6503
6504                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6505         }
6506
6507         print qq!<div class="page_body">\n!;
6508         print qq!<div id="progress_info">... / ...</div>\n!
6509                 if ($format eq 'incremental');
6510         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6511               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6512               qq!<thead>\n!.
6513               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6514               qq!</thead>\n!.
6515               qq!<tbody>\n!;
6516
6517         my @rev_color = qw(light dark);
6518         my $num_colors = scalar(@rev_color);
6519         my $current_color = 0;
6520
6521         if ($format eq 'incremental') {
6522                 my $color_class = $rev_color[$current_color];
6523
6524                 #contents of a file
6525                 my $linenr = 0;
6526         LINE:
6527                 while (my $line = <$fd>) {
6528                         chomp $line;
6529                         $linenr++;
6530
6531                         print qq!<tr id="l$linenr" class="$color_class">!.
6532                               qq!<td class="sha1"><a href=""> </a></td>!.
6533                               qq!<td class="linenr">!.
6534                               qq!<a class="linenr" href="">$linenr</a></td>!;
6535                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6536                         print qq!</tr>\n!;
6537                 }
6538
6539         } else { # porcelain, i.e. ordinary blame
6540                 my %metainfo = (); # saves information about commits
6541
6542                 # blame data
6543         LINE:
6544                 while (my $line = <$fd>) {
6545                         chomp $line;
6546                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6547                         # no <lines in group> for subsequent lines in group of lines
6548                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6549                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6550                         if (!exists $metainfo{$full_rev}) {
6551                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6552                         }
6553                         my $meta = $metainfo{$full_rev};
6554                         my $data;
6555                         while ($data = <$fd>) {
6556                                 chomp $data;
6557                                 last if ($data =~ s/^\t//); # contents of line
6558                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6559                                         $meta->{$1} = $2 unless exists $meta->{$1};
6560                                 }
6561                                 if ($data =~ /^previous /) {
6562                                         $meta->{'nprevious'}++;
6563                                 }
6564                         }
6565                         my $short_rev = substr($full_rev, 0, 8);
6566                         my $author = $meta->{'author'};
6567                         my %date =
6568                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6569                         my $date = $date{'iso-tz'};
6570                         if ($group_size) {
6571                                 $current_color = ($current_color + 1) % $num_colors;
6572                         }
6573                         my $tr_class = $rev_color[$current_color];
6574                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6575                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6576                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6577                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6578                         if ($group_size) {
6579                                 print "<td class=\"sha1\"";
6580                                 print " title=\"". esc_html($author) . ", $date\"";
6581                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6582                                 print ">";
6583                                 print $cgi->a({-href => href(action=>"commit",
6584                                                              hash=>$full_rev,
6585                                                              file_name=>$file_name)},
6586                                               esc_html($short_rev));
6587                                 if ($group_size >= 2) {
6588                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6589                                         if (@author_initials) {
6590                                                 print "<br />" .
6591                                                       esc_html(join('', @author_initials));
6592                                                 #           or join('.', ...)
6593                                         }
6594                                 }
6595                                 print "</td>\n";
6596                         }
6597                         # 'previous' <sha1 of parent commit> <filename at commit>
6598                         if (exists $meta->{'previous'} &&
6599                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6600                                 $meta->{'parent'} = $1;
6601                                 $meta->{'file_parent'} = unquote($2);
6602                         }
6603                         my $linenr_commit =
6604                                 exists($meta->{'parent'}) ?
6605                                 $meta->{'parent'} : $full_rev;
6606                         my $linenr_filename =
6607                                 exists($meta->{'file_parent'}) ?
6608                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6609                         my $blamed = href(action => 'blame',
6610                                           file_name => $linenr_filename,
6611                                           hash_base => $linenr_commit);
6612                         print "<td class=\"linenr\">";
6613                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6614                                         -class => "linenr" },
6615                                       esc_html($lineno));
6616                         print "</td>";
6617                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6618                         print "</tr>\n";
6619                 } # end while
6620
6621         }
6622
6623         # footer
6624         print "</tbody>\n".
6625               "</table>\n"; # class="blame"
6626         print "</div>\n";   # class="blame_body"
6627         close $fd
6628                 or print "Reading blob failed\n";
6629
6630         git_footer_html();
6631 }
6632
6633 sub git_blame {
6634         git_blame_common();
6635 }
6636
6637 sub git_blame_incremental {
6638         git_blame_common('incremental');
6639 }
6640
6641 sub git_blame_data {
6642         git_blame_common('data');
6643 }
6644
6645 sub git_tags {
6646         my $head = git_get_head_hash($project);
6647         git_header_html();
6648         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6649         git_print_header_div('summary', $project);
6650
6651         my @tagslist = git_get_tags_list();
6652         if (@tagslist) {
6653                 git_tags_body(\@tagslist);
6654         }
6655         git_footer_html();
6656 }
6657
6658 sub git_heads {
6659         my $head = git_get_head_hash($project);
6660         git_header_html();
6661         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6662         git_print_header_div('summary', $project);
6663
6664         my @headslist = git_get_heads_list();
6665         if (@headslist) {
6666                 git_heads_body(\@headslist, $head);
6667         }
6668         git_footer_html();
6669 }
6670
6671 # used both for single remote view and for list of all the remotes
6672 sub git_remotes {
6673         gitweb_check_feature('remote_heads')
6674                 or die_error(403, "Remote heads view is disabled");
6675
6676         my $head = git_get_head_hash($project);
6677         my $remote = $input_params{'hash'};
6678
6679         my $remotedata = git_get_remotes_list($remote);
6680         die_error(500, "Unable to get remote information") unless defined $remotedata;
6681
6682         unless (%$remotedata) {
6683                 die_error(404, defined $remote ?
6684                         "Remote $remote not found" :
6685                         "No remotes found");
6686         }
6687
6688         git_header_html(undef, undef, -action_extra => $remote);
6689         git_print_page_nav('', '',  $head, undef, $head,
6690                 format_ref_views($remote ? '' : 'remotes'));
6691
6692         fill_remote_heads($remotedata);
6693         if (defined $remote) {
6694                 git_print_header_div('remotes', "$remote remote for $project");
6695                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6696         } else {
6697                 git_print_header_div('summary', "$project remotes");
6698                 git_remotes_body($remotedata, undef, $head);
6699         }
6700
6701         git_footer_html();
6702 }
6703
6704 sub git_blob_plain {
6705         my $type = shift;
6706         my $expires;
6707
6708         if (!defined $hash) {
6709                 if (defined $file_name) {
6710                         my $base = $hash_base || git_get_head_hash($project);
6711                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6712                                 or die_error(404, "Cannot find file");
6713                 } else {
6714                         die_error(400, "No file name defined");
6715                 }
6716         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6717                 # blobs defined by non-textual hash id's can be cached
6718                 $expires = "+1d";
6719         }
6720
6721         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6722                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6723
6724         # content-type (can include charset)
6725         $type = blob_contenttype($fd, $file_name, $type);
6726
6727         # "save as" filename, even when no $file_name is given
6728         my $save_as = "$hash";
6729         if (defined $file_name) {
6730                 $save_as = $file_name;
6731         } elsif ($type =~ m/^text\//) {
6732                 $save_as .= '.txt';
6733         }
6734
6735         # With XSS prevention on, blobs of all types except a few known safe
6736         # ones are served with "Content-Disposition: attachment" to make sure
6737         # they don't run in our security domain.  For certain image types,
6738         # blob view writes an <img> tag referring to blob_plain view, and we
6739         # want to be sure not to break that by serving the image as an
6740         # attachment (though Firefox 3 doesn't seem to care).
6741         my $sandbox = $prevent_xss &&
6742                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6743
6744         # serve text/* as text/plain
6745         if ($prevent_xss &&
6746             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6747              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6748                 my $rest = $1;
6749                 $rest = defined $rest ? $rest : '';
6750                 $type = "text/plain$rest";
6751         }
6752
6753         print $cgi->header(
6754                 -type => $type,
6755                 -expires => $expires,
6756                 -content_disposition =>
6757                         ($sandbox ? 'attachment' : 'inline')
6758                         . '; filename="' . $save_as . '"');
6759         local $/ = undef;
6760         binmode STDOUT, ':raw';
6761         print <$fd>;
6762         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6763         close $fd;
6764 }
6765
6766 sub git_blob {
6767         my $expires;
6768
6769         if (!defined $hash) {
6770                 if (defined $file_name) {
6771                         my $base = $hash_base || git_get_head_hash($project);
6772                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6773                                 or die_error(404, "Cannot find file");
6774                 } else {
6775                         die_error(400, "No file name defined");
6776                 }
6777         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6778                 # blobs defined by non-textual hash id's can be cached
6779                 $expires = "+1d";
6780         }
6781
6782         my $have_blame = gitweb_check_feature('blame');
6783         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6784                 or die_error(500, "Couldn't cat $file_name, $hash");
6785         my $mimetype = blob_mimetype($fd, $file_name);
6786         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6787         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6788                 close $fd;
6789                 return git_blob_plain($mimetype);
6790         }
6791         # we can have blame only for text/* mimetype
6792         $have_blame &&= ($mimetype =~ m!^text/!);
6793
6794         my $highlight = gitweb_check_feature('highlight');
6795         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6796         $fd = run_highlighter($fd, $highlight, $syntax)
6797                 if $syntax;
6798
6799         git_header_html(undef, $expires);
6800         my $formats_nav = '';
6801         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6802                 if (defined $file_name) {
6803                         if ($have_blame) {
6804                                 $formats_nav .=
6805                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6806                                                 "blame") .
6807                                         " | ";
6808                         }
6809                         $formats_nav .=
6810                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6811                                         "history") .
6812                                 " | " .
6813                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6814                                         "raw") .
6815                                 " | " .
6816                                 $cgi->a({-href => href(action=>"blob",
6817                                                        hash_base=>"HEAD", file_name=>$file_name)},
6818                                         "HEAD");
6819                 } else {
6820                         $formats_nav .=
6821                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6822                                         "raw");
6823                 }
6824                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6825                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6826         } else {
6827                 print "<div class=\"page_nav\">\n" .
6828                       "<br/><br/></div>\n" .
6829                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6830         }
6831         git_print_page_path($file_name, "blob", $hash_base);
6832         print "<div class=\"page_body\">\n";
6833         if ($mimetype =~ m!^image/!) {
6834                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6835                 if ($file_name) {
6836                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6837                 }
6838                 print qq! src="! .
6839                       href(action=>"blob_plain", hash=>$hash,
6840                            hash_base=>$hash_base, file_name=>$file_name) .
6841                       qq!" />\n!;
6842         } else {
6843                 my $nr;
6844                 while (my $line = <$fd>) {
6845                         chomp $line;
6846                         $nr++;
6847                         $line = untabify($line);
6848                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6849                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6850                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6851                 }
6852         }
6853         close $fd
6854                 or print "Reading blob failed.\n";
6855         print "</div>";
6856         git_footer_html();
6857 }
6858
6859 sub git_tree {
6860         if (!defined $hash_base) {
6861                 $hash_base = "HEAD";
6862         }
6863         if (!defined $hash) {
6864                 if (defined $file_name) {
6865                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6866                 } else {
6867                         $hash = $hash_base;
6868                 }
6869         }
6870         die_error(404, "No such tree") unless defined($hash);
6871
6872         my $show_sizes = gitweb_check_feature('show-sizes');
6873         my $have_blame = gitweb_check_feature('blame');
6874
6875         my @entries = ();
6876         {
6877                 local $/ = "\0";
6878                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6879                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6880                         or die_error(500, "Open git-ls-tree failed");
6881                 @entries = map { chomp; $_ } <$fd>;
6882                 close $fd
6883                         or die_error(404, "Reading tree failed");
6884         }
6885
6886         my $refs = git_get_references();
6887         my $ref = format_ref_marker($refs, $hash_base);
6888         git_header_html();
6889         my $basedir = '';
6890         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6891                 my @views_nav = ();
6892                 if (defined $file_name) {
6893                         push @views_nav,
6894                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6895                                         "history"),
6896                                 $cgi->a({-href => href(action=>"tree",
6897                                                        hash_base=>"HEAD", file_name=>$file_name)},
6898                                         "HEAD"),
6899                 }
6900                 my $snapshot_links = format_snapshot_links($hash);
6901                 if (defined $snapshot_links) {
6902                         # FIXME: Should be available when we have no hash base as well.
6903                         push @views_nav, $snapshot_links;
6904                 }
6905                 git_print_page_nav('tree','', $hash_base, undef, undef,
6906                                    join(' | ', @views_nav));
6907                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6908         } else {
6909                 undef $hash_base;
6910                 print "<div class=\"page_nav\">\n";
6911                 print "<br/><br/></div>\n";
6912                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6913         }
6914         if (defined $file_name) {
6915                 $basedir = $file_name;
6916                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6917                         $basedir .= '/';
6918                 }
6919                 git_print_page_path($file_name, 'tree', $hash_base);
6920         }
6921         print "<div class=\"page_body\">\n";
6922         print "<table class=\"tree\">\n";
6923         my $alternate = 1;
6924         # '..' (top directory) link if possible
6925         if (defined $hash_base &&
6926             defined $file_name && $file_name =~ m![^/]+$!) {
6927                 if ($alternate) {
6928                         print "<tr class=\"dark\">\n";
6929                 } else {
6930                         print "<tr class=\"light\">\n";
6931                 }
6932                 $alternate ^= 1;
6933
6934                 my $up = $file_name;
6935                 $up =~ s!/?[^/]+$!!;
6936                 undef $up unless $up;
6937                 # based on git_print_tree_entry
6938                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6939                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6940                 print '<td class="list">';
6941                 print $cgi->a({-href => href(action=>"tree",
6942                                              hash_base=>$hash_base,
6943                                              file_name=>$up)},
6944                               "..");
6945                 print "</td>\n";
6946                 print "<td class=\"link\"></td>\n";
6947
6948                 print "</tr>\n";
6949         }
6950         foreach my $line (@entries) {
6951                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6952
6953                 if ($alternate) {
6954                         print "<tr class=\"dark\">\n";
6955                 } else {
6956                         print "<tr class=\"light\">\n";
6957                 }
6958                 $alternate ^= 1;
6959
6960                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6961
6962                 print "</tr>\n";
6963         }
6964         print "</table>\n" .
6965               "</div>";
6966         git_footer_html();
6967 }
6968
6969 sub snapshot_name {
6970         my ($project, $hash) = @_;
6971
6972         # path/to/project.git  -> project
6973         # path/to/project/.git -> project
6974         my $name = to_utf8($project);
6975         $name =~ s,([^/])/*\.git$,$1,;
6976         $name = basename($name);
6977         # sanitize name
6978         $name =~ s/[[:cntrl:]]/?/g;
6979
6980         my $ver = $hash;
6981         if ($hash =~ /^[0-9a-fA-F]+$/) {
6982                 # shorten SHA-1 hash
6983                 my $full_hash = git_get_full_hash($project, $hash);
6984                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6985                         $ver = git_get_short_hash($project, $hash);
6986                 }
6987         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6988                 # tags don't need shortened SHA-1 hash
6989                 $ver = $1;
6990         } else {
6991                 # branches and other need shortened SHA-1 hash
6992                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6993                         $ver = $1;
6994                 }
6995                 $ver .= '-' . git_get_short_hash($project, $hash);
6996         }
6997         # in case of hierarchical branch names
6998         $ver =~ s!/!.!g;
6999
7000         # name = project-version_string
7001         $name = "$name-$ver";
7002
7003         return wantarray ? ($name, $name) : $name;
7004 }
7005
7006 sub git_snapshot {
7007         my $format = $input_params{'snapshot_format'};
7008         if (!@snapshot_fmts) {
7009                 die_error(403, "Snapshots not allowed");
7010         }
7011         # default to first supported snapshot format
7012         $format ||= $snapshot_fmts[0];
7013         if ($format !~ m/^[a-z0-9]+$/) {
7014                 die_error(400, "Invalid snapshot format parameter");
7015         } elsif (!exists($known_snapshot_formats{$format})) {
7016                 die_error(400, "Unknown snapshot format");
7017         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7018                 die_error(403, "Snapshot format not allowed");
7019         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7020                 die_error(403, "Unsupported snapshot format");
7021         }
7022
7023         my $type = git_get_type("$hash^{}");
7024         if (!$type) {
7025                 die_error(404, 'Object does not exist');
7026         }  elsif ($type eq 'blob') {
7027                 die_error(400, 'Object is not a tree-ish');
7028         }
7029
7030         my ($name, $prefix) = snapshot_name($project, $hash);
7031         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7032         my $cmd = quote_command(
7033                 git_cmd(), 'archive',
7034                 "--format=$known_snapshot_formats{$format}{'format'}",
7035                 "--prefix=$prefix/", $hash);
7036         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7037                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7038         }
7039
7040         $filename =~ s/(["\\])/\\$1/g;
7041         print $cgi->header(
7042                 -type => $known_snapshot_formats{$format}{'type'},
7043                 -content_disposition => 'inline; filename="' . $filename . '"',
7044                 -status => '200 OK');
7045
7046         open my $fd, "-|", $cmd
7047                 or die_error(500, "Execute git-archive failed");
7048         binmode STDOUT, ':raw';
7049         print <$fd>;
7050         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7051         close $fd;
7052 }
7053
7054 sub git_log_generic {
7055         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7056
7057         my $head = git_get_head_hash($project);
7058         if (!defined $base) {
7059                 $base = $head;
7060         }
7061         if (!defined $page) {
7062                 $page = 0;
7063         }
7064         my $refs = git_get_references();
7065
7066         my $commit_hash = $base;
7067         if (defined $parent) {
7068                 $commit_hash = "$parent..$base";
7069         }
7070         my @commitlist =
7071                 parse_commits($commit_hash, 101, (100 * $page),
7072                               defined $file_name ? ($file_name, "--full-history") : ());
7073
7074         my $ftype;
7075         if (!defined $file_hash && defined $file_name) {
7076                 # some commits could have deleted file in question,
7077                 # and not have it in tree, but one of them has to have it
7078                 for (my $i = 0; $i < @commitlist; $i++) {
7079                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7080                         last if defined $file_hash;
7081                 }
7082         }
7083         if (defined $file_hash) {
7084                 $ftype = git_get_type($file_hash);
7085         }
7086         if (defined $file_name && !defined $ftype) {
7087                 die_error(500, "Unknown type of object");
7088         }
7089         my %co;
7090         if (defined $file_name) {
7091                 %co = parse_commit($base)
7092                         or die_error(404, "Unknown commit object");
7093         }
7094
7095
7096         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7097         my $next_link = '';
7098         if ($#commitlist >= 100) {
7099                 $next_link =
7100                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7101                                  -accesskey => "n", -title => "Alt-n"}, "next");
7102         }
7103         my $patch_max = gitweb_get_feature('patches');
7104         if ($patch_max && !defined $file_name) {
7105                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7106                         $paging_nav .= " &sdot; " .
7107                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7108                                         "patches");
7109                 }
7110         }
7111
7112         git_header_html();
7113         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7114         if (defined $file_name) {
7115                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7116         } else {
7117                 git_print_header_div('summary', $project)
7118         }
7119         git_print_page_path($file_name, $ftype, $hash_base)
7120                 if (defined $file_name);
7121
7122         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7123                      $file_name, $file_hash, $ftype);
7124
7125         git_footer_html();
7126 }
7127
7128 sub git_log {
7129         git_log_generic('log', \&git_log_body,
7130                         $hash, $hash_parent);
7131 }
7132
7133 sub git_commit {
7134         $hash ||= $hash_base || "HEAD";
7135         my %co = parse_commit($hash)
7136             or die_error(404, "Unknown commit object");
7137
7138         my $parent  = $co{'parent'};
7139         my $parents = $co{'parents'}; # listref
7140
7141         # we need to prepare $formats_nav before any parameter munging
7142         my $formats_nav;
7143         if (!defined $parent) {
7144                 # --root commitdiff
7145                 $formats_nav .= '(initial)';
7146         } elsif (@$parents == 1) {
7147                 # single parent commit
7148                 $formats_nav .=
7149                         '(parent: ' .
7150                         $cgi->a({-href => href(action=>"commit",
7151                                                hash=>$parent)},
7152                                 esc_html(substr($parent, 0, 7))) .
7153                         ')';
7154         } else {
7155                 # merge commit
7156                 $formats_nav .=
7157                         '(merge: ' .
7158                         join(' ', map {
7159                                 $cgi->a({-href => href(action=>"commit",
7160                                                        hash=>$_)},
7161                                         esc_html(substr($_, 0, 7)));
7162                         } @$parents ) .
7163                         ')';
7164         }
7165         if (gitweb_check_feature('patches') && @$parents <= 1) {
7166                 $formats_nav .= " | " .
7167                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7168                                 "patch");
7169         }
7170
7171         if (!defined $parent) {
7172                 $parent = "--root";
7173         }
7174         my @difftree;
7175         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7176                 @diff_opts,
7177                 (@$parents <= 1 ? $parent : '-c'),
7178                 $hash, "--"
7179                 or die_error(500, "Open git-diff-tree failed");
7180         @difftree = map { chomp; $_ } <$fd>;
7181         close $fd or die_error(404, "Reading git-diff-tree failed");
7182
7183         # non-textual hash id's can be cached
7184         my $expires;
7185         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7186                 $expires = "+1d";
7187         }
7188         my $refs = git_get_references();
7189         my $ref = format_ref_marker($refs, $co{'id'});
7190
7191         git_header_html(undef, $expires);
7192         git_print_page_nav('commit', '',
7193                            $hash, $co{'tree'}, $hash,
7194                            $formats_nav);
7195
7196         if (defined $co{'parent'}) {
7197                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7198         } else {
7199                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7200         }
7201         print "<div class=\"title_text\">\n" .
7202               "<table class=\"object_header\">\n";
7203         git_print_authorship_rows(\%co);
7204         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7205         print "<tr>" .
7206               "<td>tree</td>" .
7207               "<td class=\"sha1\">" .
7208               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7209                        class => "list"}, $co{'tree'}) .
7210               "</td>" .
7211               "<td class=\"link\">" .
7212               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7213                       "tree");
7214         my $snapshot_links = format_snapshot_links($hash);
7215         if (defined $snapshot_links) {
7216                 print " | " . $snapshot_links;
7217         }
7218         print "</td>" .
7219               "</tr>\n";
7220
7221         foreach my $par (@$parents) {
7222                 print "<tr>" .
7223                       "<td>parent</td>" .
7224                       "<td class=\"sha1\">" .
7225                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7226                                class => "list"}, $par) .
7227                       "</td>" .
7228                       "<td class=\"link\">" .
7229                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7230                       " | " .
7231                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7232                       "</td>" .
7233                       "</tr>\n";
7234         }
7235         print "</table>".
7236               "</div>\n";
7237
7238         print "<div class=\"page_body\">\n";
7239         git_print_log($co{'comment'});
7240         print "</div>\n";
7241
7242         git_difftree_body(\@difftree, $hash, @$parents);
7243
7244         git_footer_html();
7245 }
7246
7247 sub git_object {
7248         # object is defined by:
7249         # - hash or hash_base alone
7250         # - hash_base and file_name
7251         my $type;
7252
7253         # - hash or hash_base alone
7254         if ($hash || ($hash_base && !defined $file_name)) {
7255                 my $object_id = $hash || $hash_base;
7256
7257                 open my $fd, "-|", quote_command(
7258                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7259                         or die_error(404, "Object does not exist");
7260                 $type = <$fd>;
7261                 chomp $type;
7262                 close $fd
7263                         or die_error(404, "Object does not exist");
7264
7265         # - hash_base and file_name
7266         } elsif ($hash_base && defined $file_name) {
7267                 $file_name =~ s,/+$,,;
7268
7269                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7270                         or die_error(404, "Base object does not exist");
7271
7272                 # here errors should not hapen
7273                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7274                         or die_error(500, "Open git-ls-tree failed");
7275                 my $line = <$fd>;
7276                 close $fd;
7277
7278                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7279                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7280                         die_error(404, "File or directory for given base does not exist");
7281                 }
7282                 $type = $2;
7283                 $hash = $3;
7284         } else {
7285                 die_error(400, "Not enough information to find object");
7286         }
7287
7288         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7289                                           hash=>$hash, hash_base=>$hash_base,
7290                                           file_name=>$file_name),
7291                              -status => '302 Found');
7292 }
7293
7294 sub git_blobdiff {
7295         my $format = shift || 'html';
7296         my $diff_style = $input_params{'diff_style'} || 'inline';
7297
7298         my $fd;
7299         my @difftree;
7300         my %diffinfo;
7301         my $expires;
7302
7303         # preparing $fd and %diffinfo for git_patchset_body
7304         # new style URI
7305         if (defined $hash_base && defined $hash_parent_base) {
7306                 if (defined $file_name) {
7307                         # read raw output
7308                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7309                                 $hash_parent_base, $hash_base,
7310                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7311                                 or die_error(500, "Open git-diff-tree failed");
7312                         @difftree = map { chomp; $_ } <$fd>;
7313                         close $fd
7314                                 or die_error(404, "Reading git-diff-tree failed");
7315                         @difftree
7316                                 or die_error(404, "Blob diff not found");
7317
7318                 } elsif (defined $hash &&
7319                          $hash =~ /[0-9a-fA-F]{40}/) {
7320                         # try to find filename from $hash
7321
7322                         # read filtered raw output
7323                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7324                                 $hash_parent_base, $hash_base, "--"
7325                                 or die_error(500, "Open git-diff-tree failed");
7326                         @difftree =
7327                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7328                                 # $hash == to_id
7329                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7330                                 map { chomp; $_ } <$fd>;
7331                         close $fd
7332                                 or die_error(404, "Reading git-diff-tree failed");
7333                         @difftree
7334                                 or die_error(404, "Blob diff not found");
7335
7336                 } else {
7337                         die_error(400, "Missing one of the blob diff parameters");
7338                 }
7339
7340                 if (@difftree > 1) {
7341                         die_error(400, "Ambiguous blob diff specification");
7342                 }
7343
7344                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7345                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7346                 $file_name   ||= $diffinfo{'to_file'};
7347
7348                 $hash_parent ||= $diffinfo{'from_id'};
7349                 $hash        ||= $diffinfo{'to_id'};
7350
7351                 # non-textual hash id's can be cached
7352                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7353                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7354                         $expires = '+1d';
7355                 }
7356
7357                 # open patch output
7358                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7359                         '-p', ($format eq 'html' ? "--full-index" : ()),
7360                         $hash_parent_base, $hash_base,
7361                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7362                         or die_error(500, "Open git-diff-tree failed");
7363         }
7364
7365         # old/legacy style URI -- not generated anymore since 1.4.3.
7366         if (!%diffinfo) {
7367                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7368         }
7369
7370         # header
7371         if ($format eq 'html') {
7372                 my $formats_nav =
7373                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7374                                 "raw");
7375                 $formats_nav .= diff_style_nav($diff_style);
7376                 git_header_html(undef, $expires);
7377                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7378                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7379                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7380                 } else {
7381                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7382                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7383                 }
7384                 if (defined $file_name) {
7385                         git_print_page_path($file_name, "blob", $hash_base);
7386                 } else {
7387                         print "<div class=\"page_path\"></div>\n";
7388                 }
7389
7390         } elsif ($format eq 'plain') {
7391                 print $cgi->header(
7392                         -type => 'text/plain',
7393                         -charset => 'utf-8',
7394                         -expires => $expires,
7395                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7396
7397                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7398
7399         } else {
7400                 die_error(400, "Unknown blobdiff format");
7401         }
7402
7403         # patch
7404         if ($format eq 'html') {
7405                 print "<div class=\"page_body\">\n";
7406
7407                 git_patchset_body($fd, $diff_style,
7408                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7409                 close $fd;
7410
7411                 print "</div>\n"; # class="page_body"
7412                 git_footer_html();
7413
7414         } else {
7415                 while (my $line = <$fd>) {
7416                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7417                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7418
7419                         print $line;
7420
7421                         last if $line =~ m!^\+\+\+!;
7422                 }
7423                 local $/ = undef;
7424                 print <$fd>;
7425                 close $fd;
7426         }
7427 }
7428
7429 sub git_blobdiff_plain {
7430         git_blobdiff('plain');
7431 }
7432
7433 # assumes that it is added as later part of already existing navigation,
7434 # so it returns "| foo | bar" rather than just "foo | bar"
7435 sub diff_style_nav {
7436         my ($diff_style, $is_combined) = @_;
7437         $diff_style ||= 'inline';
7438
7439         return "" if ($is_combined);
7440
7441         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7442         my %styles = @styles;
7443         @styles =
7444                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7445
7446         return join '',
7447                 map { " | ".$_ }
7448                 map {
7449                         $_ eq $diff_style ? $styles{$_} :
7450                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7451                 } @styles;
7452 }
7453
7454 sub git_commitdiff {
7455         my %params = @_;
7456         my $format = $params{-format} || 'html';
7457         my $diff_style = $input_params{'diff_style'} || 'inline';
7458
7459         my ($patch_max) = gitweb_get_feature('patches');
7460         if ($format eq 'patch') {
7461                 die_error(403, "Patch view not allowed") unless $patch_max;
7462         }
7463
7464         $hash ||= $hash_base || "HEAD";
7465         my %co = parse_commit($hash)
7466             or die_error(404, "Unknown commit object");
7467
7468         # choose format for commitdiff for merge
7469         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7470                 $hash_parent = '--cc';
7471         }
7472         # we need to prepare $formats_nav before almost any parameter munging
7473         my $formats_nav;
7474         if ($format eq 'html') {
7475                 $formats_nav =
7476                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7477                                 "raw");
7478                 if ($patch_max && @{$co{'parents'}} <= 1) {
7479                         $formats_nav .= " | " .
7480                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7481                                         "patch");
7482                 }
7483                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7484
7485                 if (defined $hash_parent &&
7486                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7487                         # commitdiff with two commits given
7488                         my $hash_parent_short = $hash_parent;
7489                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7490                                 $hash_parent_short = substr($hash_parent, 0, 7);
7491                         }
7492                         $formats_nav .=
7493                                 ' (from';
7494                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7495                                 if ($co{'parents'}[$i] eq $hash_parent) {
7496                                         $formats_nav .= ' parent ' . ($i+1);
7497                                         last;
7498                                 }
7499                         }
7500                         $formats_nav .= ': ' .
7501                                 $cgi->a({-href => href(-replay=>1,
7502                                                        hash=>$hash_parent, hash_base=>undef)},
7503                                         esc_html($hash_parent_short)) .
7504                                 ')';
7505                 } elsif (!$co{'parent'}) {
7506                         # --root commitdiff
7507                         $formats_nav .= ' (initial)';
7508                 } elsif (scalar @{$co{'parents'}} == 1) {
7509                         # single parent commit
7510                         $formats_nav .=
7511                                 ' (parent: ' .
7512                                 $cgi->a({-href => href(-replay=>1,
7513                                                        hash=>$co{'parent'}, hash_base=>undef)},
7514                                         esc_html(substr($co{'parent'}, 0, 7))) .
7515                                 ')';
7516                 } else {
7517                         # merge commit
7518                         if ($hash_parent eq '--cc') {
7519                                 $formats_nav .= ' | ' .
7520                                         $cgi->a({-href => href(-replay=>1,
7521                                                                hash=>$hash, hash_parent=>'-c')},
7522                                                 'combined');
7523                         } else { # $hash_parent eq '-c'
7524                                 $formats_nav .= ' | ' .
7525                                         $cgi->a({-href => href(-replay=>1,
7526                                                                hash=>$hash, hash_parent=>'--cc')},
7527                                                 'compact');
7528                         }
7529                         $formats_nav .=
7530                                 ' (merge: ' .
7531                                 join(' ', map {
7532                                         $cgi->a({-href => href(-replay=>1,
7533                                                                hash=>$_, hash_base=>undef)},
7534                                                 esc_html(substr($_, 0, 7)));
7535                                 } @{$co{'parents'}} ) .
7536                                 ')';
7537                 }
7538         }
7539
7540         my $hash_parent_param = $hash_parent;
7541         if (!defined $hash_parent_param) {
7542                 # --cc for multiple parents, --root for parentless
7543                 $hash_parent_param =
7544                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7545         }
7546
7547         # read commitdiff
7548         my $fd;
7549         my @difftree;
7550         if ($format eq 'html') {
7551                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7552                         "--no-commit-id", "--patch-with-raw", "--full-index",
7553                         $hash_parent_param, $hash, "--"
7554                         or die_error(500, "Open git-diff-tree failed");
7555
7556                 while (my $line = <$fd>) {
7557                         chomp $line;
7558                         # empty line ends raw part of diff-tree output
7559                         last unless $line;
7560                         push @difftree, scalar parse_difftree_raw_line($line);
7561                 }
7562
7563         } elsif ($format eq 'plain') {
7564                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7565                         '-p', $hash_parent_param, $hash, "--"
7566                         or die_error(500, "Open git-diff-tree failed");
7567         } elsif ($format eq 'patch') {
7568                 # For commit ranges, we limit the output to the number of
7569                 # patches specified in the 'patches' feature.
7570                 # For single commits, we limit the output to a single patch,
7571                 # diverging from the git-format-patch default.
7572                 my @commit_spec = ();
7573                 if ($hash_parent) {
7574                         if ($patch_max > 0) {
7575                                 push @commit_spec, "-$patch_max";
7576                         }
7577                         push @commit_spec, '-n', "$hash_parent..$hash";
7578                 } else {
7579                         if ($params{-single}) {
7580                                 push @commit_spec, '-1';
7581                         } else {
7582                                 if ($patch_max > 0) {
7583                                         push @commit_spec, "-$patch_max";
7584                                 }
7585                                 push @commit_spec, "-n";
7586                         }
7587                         push @commit_spec, '--root', $hash;
7588                 }
7589                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7590                         '--encoding=utf8', '--stdout', @commit_spec
7591                         or die_error(500, "Open git-format-patch failed");
7592         } else {
7593                 die_error(400, "Unknown commitdiff format");
7594         }
7595
7596         # non-textual hash id's can be cached
7597         my $expires;
7598         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7599                 $expires = "+1d";
7600         }
7601
7602         # write commit message
7603         if ($format eq 'html') {
7604                 my $refs = git_get_references();
7605                 my $ref = format_ref_marker($refs, $co{'id'});
7606
7607                 git_header_html(undef, $expires);
7608                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7609                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7610                 print "<div class=\"title_text\">\n" .
7611                       "<table class=\"object_header\">\n";
7612                 git_print_authorship_rows(\%co);
7613                 print "</table>".
7614                       "</div>\n";
7615                 print "<div class=\"page_body\">\n";
7616                 if (@{$co{'comment'}} > 1) {
7617                         print "<div class=\"log\">\n";
7618                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7619                         print "</div>\n"; # class="log"
7620                 }
7621
7622         } elsif ($format eq 'plain') {
7623                 my $refs = git_get_references("tags");
7624                 my $tagname = git_get_rev_name_tags($hash);
7625                 my $filename = basename($project) . "-$hash.patch";
7626
7627                 print $cgi->header(
7628                         -type => 'text/plain',
7629                         -charset => 'utf-8',
7630                         -expires => $expires,
7631                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7632                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7633                 print "From: " . to_utf8($co{'author'}) . "\n";
7634                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7635                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7636
7637                 print "X-Git-Tag: $tagname\n" if $tagname;
7638                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7639
7640                 foreach my $line (@{$co{'comment'}}) {
7641                         print to_utf8($line) . "\n";
7642                 }
7643                 print "---\n\n";
7644         } elsif ($format eq 'patch') {
7645                 my $filename = basename($project) . "-$hash.patch";
7646
7647                 print $cgi->header(
7648                         -type => 'text/plain',
7649                         -charset => 'utf-8',
7650                         -expires => $expires,
7651                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7652         }
7653
7654         # write patch
7655         if ($format eq 'html') {
7656                 my $use_parents = !defined $hash_parent ||
7657                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7658                 git_difftree_body(\@difftree, $hash,
7659                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7660                 print "<br/>\n";
7661
7662                 git_patchset_body($fd, $diff_style,
7663                                   \@difftree, $hash,
7664                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7665                 close $fd;
7666                 print "</div>\n"; # class="page_body"
7667                 git_footer_html();
7668
7669         } elsif ($format eq 'plain') {
7670                 local $/ = undef;
7671                 print <$fd>;
7672                 close $fd
7673                         or print "Reading git-diff-tree failed\n";
7674         } elsif ($format eq 'patch') {
7675                 local $/ = undef;
7676                 print <$fd>;
7677                 close $fd
7678                         or print "Reading git-format-patch failed\n";
7679         }
7680 }
7681
7682 sub git_commitdiff_plain {
7683         git_commitdiff(-format => 'plain');
7684 }
7685
7686 # format-patch-style patches
7687 sub git_patch {
7688         git_commitdiff(-format => 'patch', -single => 1);
7689 }
7690
7691 sub git_patches {
7692         git_commitdiff(-format => 'patch');
7693 }
7694
7695 sub git_history {
7696         git_log_generic('history', \&git_history_body,
7697                         $hash_base, $hash_parent_base,
7698                         $file_name, $hash);
7699 }
7700
7701 sub git_search {
7702         $searchtype ||= 'commit';
7703
7704         # check if appropriate features are enabled
7705         gitweb_check_feature('search')
7706                 or die_error(403, "Search is disabled");
7707         if ($searchtype eq 'pickaxe') {
7708                 # pickaxe may take all resources of your box and run for several minutes
7709                 # with every query - so decide by yourself how public you make this feature
7710                 gitweb_check_feature('pickaxe')
7711                         or die_error(403, "Pickaxe search is disabled");
7712         }
7713         if ($searchtype eq 'grep') {
7714                 # grep search might be potentially CPU-intensive, too
7715                 gitweb_check_feature('grep')
7716                         or die_error(403, "Grep search is disabled");
7717         }
7718
7719         if (!defined $searchtext) {
7720                 die_error(400, "Text field is empty");
7721         }
7722         if (!defined $hash) {
7723                 $hash = git_get_head_hash($project);
7724         }
7725         my %co = parse_commit($hash);
7726         if (!%co) {
7727                 die_error(404, "Unknown commit object");
7728         }
7729         if (!defined $page) {
7730                 $page = 0;
7731         }
7732
7733         if ($searchtype eq 'commit' ||
7734             $searchtype eq 'author' ||
7735             $searchtype eq 'committer') {
7736                 git_search_message(%co);
7737         } elsif ($searchtype eq 'pickaxe') {
7738                 git_search_changes(%co);
7739         } elsif ($searchtype eq 'grep') {
7740                 git_search_files(%co);
7741         } else {
7742                 die_error(400, "Unknown search type");
7743         }
7744 }
7745
7746 sub git_search_help {
7747         git_header_html();
7748         git_print_page_nav('','', $hash,$hash,$hash);
7749         print <<EOT;
7750 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7751 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7752 the pattern entered is recognized as the POSIX extended
7753 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7754 insensitive).</p>
7755 <dl>
7756 <dt><b>commit</b></dt>
7757 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7758 EOT
7759         my $have_grep = gitweb_check_feature('grep');
7760         if ($have_grep) {
7761                 print <<EOT;
7762 <dt><b>grep</b></dt>
7763 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7764     a different one) are searched for the given pattern. On large trees, this search can take
7765 a while and put some strain on the server, so please use it with some consideration. Note that
7766 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7767 case-sensitive.</dd>
7768 EOT
7769         }
7770         print <<EOT;
7771 <dt><b>author</b></dt>
7772 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7773 <dt><b>committer</b></dt>
7774 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7775 EOT
7776         my $have_pickaxe = gitweb_check_feature('pickaxe');
7777         if ($have_pickaxe) {
7778                 print <<EOT;
7779 <dt><b>pickaxe</b></dt>
7780 <dd>All commits that caused the string to appear or disappear from any file (changes that
7781 added, removed or "modified" the string) will be listed. This search can take a while and
7782 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7783 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7784 EOT
7785         }
7786         print "</dl>\n";
7787         git_footer_html();
7788 }
7789
7790 sub git_shortlog {
7791         git_log_generic('shortlog', \&git_shortlog_body,
7792                         $hash, $hash_parent);
7793 }
7794
7795 ## ......................................................................
7796 ## feeds (RSS, Atom; OPML)
7797
7798 sub git_feed {
7799         my $format = shift || 'atom';
7800         my $have_blame = gitweb_check_feature('blame');
7801
7802         # Atom: http://www.atomenabled.org/developers/syndication/
7803         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7804         if ($format ne 'rss' && $format ne 'atom') {
7805                 die_error(400, "Unknown web feed format");
7806         }
7807
7808         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7809         my $head = $hash || 'HEAD';
7810         my @commitlist = parse_commits($head, 150, 0, $file_name);
7811
7812         my %latest_commit;
7813         my %latest_date;
7814         my $content_type = "application/$format+xml";
7815         if (defined $cgi->http('HTTP_ACCEPT') &&
7816                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7817                 # browser (feed reader) prefers text/xml
7818                 $content_type = 'text/xml';
7819         }
7820         if (defined($commitlist[0])) {
7821                 %latest_commit = %{$commitlist[0]};
7822                 my $latest_epoch = $latest_commit{'committer_epoch'};
7823                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7824                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7825                 if (defined $if_modified) {
7826                         my $since;
7827                         if (eval { require HTTP::Date; 1; }) {
7828                                 $since = HTTP::Date::str2time($if_modified);
7829                         } elsif (eval { require Time::ParseDate; 1; }) {
7830                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7831                         }
7832                         if (defined $since && $latest_epoch <= $since) {
7833                                 print $cgi->header(
7834                                         -type => $content_type,
7835                                         -charset => 'utf-8',
7836                                         -last_modified => $latest_date{'rfc2822'},
7837                                         -status => '304 Not Modified');
7838                                 return;
7839                         }
7840                 }
7841                 print $cgi->header(
7842                         -type => $content_type,
7843                         -charset => 'utf-8',
7844                         -last_modified => $latest_date{'rfc2822'});
7845         } else {
7846                 print $cgi->header(
7847                         -type => $content_type,
7848                         -charset => 'utf-8');
7849         }
7850
7851         # Optimization: skip generating the body if client asks only
7852         # for Last-Modified date.
7853         return if ($cgi->request_method() eq 'HEAD');
7854
7855         # header variables
7856         my $title = "$site_name - $project/$action";
7857         my $feed_type = 'log';
7858         if (defined $hash) {
7859                 $title .= " - '$hash'";
7860                 $feed_type = 'branch log';
7861                 if (defined $file_name) {
7862                         $title .= " :: $file_name";
7863                         $feed_type = 'history';
7864                 }
7865         } elsif (defined $file_name) {
7866                 $title .= " - $file_name";
7867                 $feed_type = 'history';
7868         }
7869         $title .= " $feed_type";
7870         my $descr = git_get_project_description($project);
7871         if (defined $descr) {
7872                 $descr = esc_html($descr);
7873         } else {
7874                 $descr = "$project " .
7875                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7876                          " feed";
7877         }
7878         my $owner = git_get_project_owner($project);
7879         $owner = esc_html($owner);
7880
7881         #header
7882         my $alt_url;
7883         if (defined $file_name) {
7884                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7885         } elsif (defined $hash) {
7886                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7887         } else {
7888                 $alt_url = href(-full=>1, action=>"summary");
7889         }
7890         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7891         if ($format eq 'rss') {
7892                 print <<XML;
7893 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7894 <channel>
7895 XML
7896                 print "<title>$title</title>\n" .
7897                       "<link>$alt_url</link>\n" .
7898                       "<description>$descr</description>\n" .
7899                       "<language>en</language>\n" .
7900                       # project owner is responsible for 'editorial' content
7901                       "<managingEditor>$owner</managingEditor>\n";
7902                 if (defined $logo || defined $favicon) {
7903                         # prefer the logo to the favicon, since RSS
7904                         # doesn't allow both
7905                         my $img = esc_url($logo || $favicon);
7906                         print "<image>\n" .
7907                               "<url>$img</url>\n" .
7908                               "<title>$title</title>\n" .
7909                               "<link>$alt_url</link>\n" .
7910                               "</image>\n";
7911                 }
7912                 if (%latest_date) {
7913                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7914                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7915                 }
7916                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7917         } elsif ($format eq 'atom') {
7918                 print <<XML;
7919 <feed xmlns="http://www.w3.org/2005/Atom">
7920 XML
7921                 print "<title>$title</title>\n" .
7922                       "<subtitle>$descr</subtitle>\n" .
7923                       '<link rel="alternate" type="text/html" href="' .
7924                       $alt_url . '" />' . "\n" .
7925                       '<link rel="self" type="' . $content_type . '" href="' .
7926                       $cgi->self_url() . '" />' . "\n" .
7927                       "<id>" . href(-full=>1) . "</id>\n" .
7928                       # use project owner for feed author
7929                       "<author><name>$owner</name></author>\n";
7930                 if (defined $favicon) {
7931                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7932                 }
7933                 if (defined $logo) {
7934                         # not twice as wide as tall: 72 x 27 pixels
7935                         print "<logo>" . esc_url($logo) . "</logo>\n";
7936                 }
7937                 if (! %latest_date) {
7938                         # dummy date to keep the feed valid until commits trickle in:
7939                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7940                 } else {
7941                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7942                 }
7943                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7944         }
7945
7946         # contents
7947         for (my $i = 0; $i <= $#commitlist; $i++) {
7948                 my %co = %{$commitlist[$i]};
7949                 my $commit = $co{'id'};
7950                 # we read 150, we always show 30 and the ones more recent than 48 hours
7951                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7952                         last;
7953                 }
7954                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7955
7956                 # get list of changed files
7957                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7958                         $co{'parent'} || "--root",
7959                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7960                         or next;
7961                 my @difftree = map { chomp; $_ } <$fd>;
7962                 close $fd
7963                         or next;
7964
7965                 # print element (entry, item)
7966                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7967                 if ($format eq 'rss') {
7968                         print "<item>\n" .
7969                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7970                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7971                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7972                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7973                               "<link>$co_url</link>\n" .
7974                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7975                               "<content:encoded>" .
7976                               "<![CDATA[\n";
7977                 } elsif ($format eq 'atom') {
7978                         print "<entry>\n" .
7979                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7980                               "<updated>$cd{'iso-8601'}</updated>\n" .
7981                               "<author>\n" .
7982                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7983                         if ($co{'author_email'}) {
7984                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7985                         }
7986                         print "</author>\n" .
7987                               # use committer for contributor
7988                               "<contributor>\n" .
7989                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7990                         if ($co{'committer_email'}) {
7991                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7992                         }
7993                         print "</contributor>\n" .
7994                               "<published>$cd{'iso-8601'}</published>\n" .
7995                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7996                               "<id>$co_url</id>\n" .
7997                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7998                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7999                 }
8000                 my $comment = $co{'comment'};
8001                 print "<pre>\n";
8002                 foreach my $line (@$comment) {
8003                         $line = esc_html($line);
8004                         print "$line\n";
8005                 }
8006                 print "</pre><ul>\n";
8007                 foreach my $difftree_line (@difftree) {
8008                         my %difftree = parse_difftree_raw_line($difftree_line);
8009                         next if !$difftree{'from_id'};
8010
8011                         my $file = $difftree{'file'} || $difftree{'to_file'};
8012
8013                         print "<li>" .
8014                               "[" .
8015                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8016                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8017                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8018                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8019                                       -title => "diff"}, 'D');
8020                         if ($have_blame) {
8021                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8022                                                              file_name=>$file, hash_base=>$commit),
8023                                               -title => "blame"}, 'B');
8024                         }
8025                         # if this is not a feed of a file history
8026                         if (!defined $file_name || $file_name ne $file) {
8027                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8028                                                              file_name=>$file, hash=>$commit),
8029                                               -title => "history"}, 'H');
8030                         }
8031                         $file = esc_path($file);
8032                         print "] ".
8033                               "$file</li>\n";
8034                 }
8035                 if ($format eq 'rss') {
8036                         print "</ul>]]>\n" .
8037                               "</content:encoded>\n" .
8038                               "</item>\n";
8039                 } elsif ($format eq 'atom') {
8040                         print "</ul>\n</div>\n" .
8041                               "</content>\n" .
8042                               "</entry>\n";
8043                 }
8044         }
8045
8046         # end of feed
8047         if ($format eq 'rss') {
8048                 print "</channel>\n</rss>\n";
8049         } elsif ($format eq 'atom') {
8050                 print "</feed>\n";
8051         }
8052 }
8053
8054 sub git_rss {
8055         git_feed('rss');
8056 }
8057
8058 sub git_atom {
8059         git_feed('atom');
8060 }
8061
8062 sub git_opml {
8063         my @list = git_get_projects_list($project_filter, $strict_export);
8064         if (!@list) {
8065                 die_error(404, "No projects found");
8066         }
8067
8068         print $cgi->header(
8069                 -type => 'text/xml',
8070                 -charset => 'utf-8',
8071                 -content_disposition => 'inline; filename="opml.xml"');
8072
8073         my $title = esc_html($site_name);
8074         my $filter = " within subdirectory ";
8075         if (defined $project_filter) {
8076                 $filter .= esc_html($project_filter);
8077         } else {
8078                 $filter = "";
8079         }
8080         print <<XML;
8081 <?xml version="1.0" encoding="utf-8"?>
8082 <opml version="1.0">
8083 <head>
8084   <title>$title OPML Export$filter</title>
8085 </head>
8086 <body>
8087 <outline text="git RSS feeds">
8088 XML
8089
8090         foreach my $pr (@list) {
8091                 my %proj = %$pr;
8092                 my $head = git_get_head_hash($proj{'path'});
8093                 if (!defined $head) {
8094                         next;
8095                 }
8096                 $git_dir = "$projectroot/$proj{'path'}";
8097                 my %co = parse_commit($head);
8098                 if (!%co) {
8099                         next;
8100                 }
8101
8102                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8103                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8104                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8105                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8106         }
8107         print <<XML;
8108 </outline>
8109 </body>
8110 </opml>
8111 XML
8112 }