gitweb/gitweb.perl

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