gitweb/gitweb.perl

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