git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         project_filter => "pf",
 764         # this must be last entry (for manipulation from JavaScript)
 765         javascript => "js"
 766 );
 767 our %cgi_param_mapping = @cgi_param_mapping;
 768
 769 # we will also need to know the possible actions, for validation
 770 our %actions = (
 771         "blame" => \&git_blame,
 772         "blame_incremental" => \&git_blame_incremental,
 773         "blame_data" => \&git_blame_data,
 774         "blobdiff" => \&git_blobdiff,
 775         "blobdiff_plain" => \&git_blobdiff_plain,
 776         "blob" => \&git_blob,
 777         "blob_plain" => \&git_blob_plain,
 778         "commitdiff" => \&git_commitdiff,
 779         "commitdiff_plain" => \&git_commitdiff_plain,
 780         "commit" => \&git_commit,
 781         "forks" => \&git_forks,
 782         "heads" => \&git_heads,
 783         "history" => \&git_history,
 784         "log" => \&git_log,
 785         "patch" => \&git_patch,
 786         "patches" => \&git_patches,
 787         "remotes" => \&git_remotes,
 788         "rss" => \&git_rss,
 789         "atom" => \&git_atom,
 790         "search" => \&git_search,
 791         "search_help" => \&git_search_help,
 792         "shortlog" => \&git_shortlog,
 793         "summary" => \&git_summary,
 794         "tag" => \&git_tag,
 795         "tags" => \&git_tags,
 796         "tree" => \&git_tree,
 797         "snapshot" => \&git_snapshot,
 798         "object" => \&git_object,
 799         # those below don't need $project
 800         "opml" => \&git_opml,
 801         "project_list" => \&git_project_list,
 802         "project_index" => \&git_project_index,
 803 );
 804
 805 # finally, we have the hash of allowed extra_options for the commands that
 806 # allow them
 807 our %allowed_options = (
 808         "--no-merges" => [ qw(rss atom log shortlog history) ],
 809 );
 810
 811 # fill %input_params with the CGI parameters. All values except for 'opt'
 812 # should be single values, but opt can be an array. We should probably
 813 # build an array of parameters that can be multi-valued, but since for the time
 814 # being it's only this one, we just single it out
 815 sub evaluate_query_params {
 816         our $cgi;
 817
 818         while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                 if ($symbol eq 'opt') {
 820                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 823                 }
 824         }
 825 }
 826
 827 # now read PATH_INFO and update the parameter list for missing parameters
 828 sub evaluate_path_info {
 829         return if defined $input_params{'project'};
 830         return if !$path_info;
 831         $path_info =~ s,^/+,,;
 832         return if !$path_info;
 833
 834         # find which part of PATH_INFO is project
 835         my $project = $path_info;
 836         $project =~ s,/+$,,;
 837         while ($project && !check_head_link("$projectroot/$project")) {
 838                 $project =~ s,/*[^/]*$,,;
 839         }
 840         return unless $project;
 841         $input_params{'project'} = $project;
 842
 843         # do not change any parameters if an action is given using the query string
 844         return if $input_params{'action'};
 845         $path_info =~ s,^\Q$project\E/*,,;
 846
 847         # next, check if we have an action
 848         my $action = $path_info;
 849         $action =~ s,/.*$,,;
 850         if (exists $actions{$action}) {
 851                 $path_info =~ s,^$action/*,,;
 852                 $input_params{'action'} = $action;
 853         }
 854
 855         # list of actions that want hash_base instead of hash, but can have no
 856         # pathname (f) parameter
 857         my @wants_base = (
 858                 'tree',
 859                 'history',
 860         );
 861
 862         # we want to catch, among others
 863         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864         my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867         # first, analyze the 'current' part
 868         if (defined $pathname) {
 869                 # we got "branch:filename" or "branch:dir/"
 870                 # we could use git_get_type(branch:pathname), but:
 871                 # - it needs $git_dir
 872                 # - it does a git() call
 873                 # - the convention of terminating directories with a slash
 874                 #   makes it superfluous
 875                 # - embedding the action in the PATH_INFO would make it even
 876                 #   more superfluous
 877                 $pathname =~ s,^/+,,;
 878                 if (!$pathname || substr($pathname, -1) eq "/") {
 879                         $input_params{'action'} ||= "tree";
 880                         $pathname =~ s,/$,,;
 881                 } else {
 882                         # the default action depends on whether we had parent info
 883                         # or not
 884                         if ($parentrefname) {
 885                                 $input_params{'action'} ||= "blobdiff_plain";
 886                         } else {
 887                                 $input_params{'action'} ||= "blob_plain";
 888                         }
 889                 }
 890                 $input_params{'hash_base'} ||= $refname;
 891                 $input_params{'file_name'} ||= $pathname;
 892         } elsif (defined $refname) {
 893                 # we got "branch". In this case we have to choose if we have to
 894                 # set hash or hash_base.
 895                 #
 896                 # Most of the actions without a pathname only want hash to be
 897                 # set, except for the ones specified in @wants_base that want
 898                 # hash_base instead. It should also be noted that hand-crafted
 899                 # links having 'history' as an action and no pathname or hash
 900                 # set will fail, but that happens regardless of PATH_INFO.
 901                 if (defined $parentrefname) {
 902                         # if there is parent let the default be 'shortlog' action
 903                         # (for http://git.example.com/repo.git/A..B links); if there
 904                         # is no parent, dispatch will detect type of object and set
 905                         # action appropriately if required (if action is not set)
 906                         $input_params{'action'} ||= "shortlog";
 907                 }
 908                 if ($input_params{'action'} &&
 909                     grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_base'} ||= $refname;
 911                 } else {
 912                         $input_params{'hash'} ||= $refname;
 913                 }
 914         }
 915
 916         # next, handle the 'parent' part, if present
 917         if (defined $parentrefname) {
 918                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                 # someproject/blobdiff/oldrev..newrev:/filename
 920                 if ($parentpathname) {
 921                         $parentpathname =~ s,^/+,,;
 922                         $parentpathname =~ s,/$,,;
 923                         $input_params{'file_parent'} ||= $parentpathname;
 924                 } else {
 925                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                 }
 927                 # we assume that hash_parent_base is wanted if a path was specified,
 928                 # or if the action wants hash_base instead of hash
 929                 if (defined $input_params{'file_parent'} ||
 930                         grep { $_ eq $input_params{'action'} } @wants_base) {
 931                         $input_params{'hash_parent_base'} ||= $parentrefname;
 932                 } else {
 933                         $input_params{'hash_parent'} ||= $parentrefname;
 934                 }
 935         }
 936
 937         # for the snapshot action, we allow URLs in the form
 938         # $project/snapshot/$hash.ext
 939         # where .ext determines the snapshot and gets removed from the
 940         # passed $refname to provide the $hash.
 941         #
 942         # To be able to tell that $refname includes the format extension, we
 943         # require the following two conditions to be satisfied:
 944         # - the hash input parameter MUST have been set from the $refname part
 945         #   of the URL (i.e. they must be equal)
 946         # - the snapshot format MUST NOT have been defined already (e.g. from
 947         #   CGI parameter sf)
 948         # It's also useless to try any matching unless $refname has a dot,
 949         # so we check for that too
 950         if (defined $input_params{'action'} &&
 951                 $input_params{'action'} eq 'snapshot' &&
 952                 defined $refname && index($refname, '.') != -1 &&
 953                 $refname eq $input_params{'hash'} &&
 954                 !defined $input_params{'snapshot_format'}) {
 955                 # We loop over the known snapshot formats, checking for
 956                 # extensions. Allowed extensions are both the defined suffix
 957                 # (which includes the initial dot already) and the snapshot
 958                 # format key itself, with a prepended dot
 959                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                         my $hash = $refname;
 961                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                 next;
 963                         }
 964                         my $sfx = $1;
 965                         # a valid suffix was found, so set the snapshot format
 966                         # and reset the hash parameter
 967                         $input_params{'snapshot_format'} = $fmt;
 968                         $input_params{'hash'} = $hash;
 969                         # we also set the format suffix to the one requested
 970                         # in the URL: this way a request for e.g. .tgz returns
 971                         # a .tgz instead of a .tar.gz
 972                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                         last;
 974                 }
 975         }
 976 }
 977
 978 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980      $searchtext, $search_regexp, $project_filter);
 981 sub evaluate_and_validate_params {
 982         our $action = $input_params{'action'};
 983         if (defined $action) {
 984                 if (!validate_action($action)) {
 985                         die_error(400, "Invalid action parameter");
 986                 }
 987         }
 988
 989         # parameters which are pathnames
 990         our $project = $input_params{'project'};
 991         if (defined $project) {
 992                 if (!validate_project($project)) {
 993                         undef $project;
 994                         die_error(404, "No such project");
 995                 }
 996         }
 997
 998         our $project_filter = $input_params{'project_filter'};
 999         if (defined $project_filter) {
1000                 if (!validate_pathname($project_filter)) {
1001                         die_error(404, "Invalid project_filter parameter");
1002                 }
1003         }
1004
1005         our $file_name = $input_params{'file_name'};
1006         if (defined $file_name) {
1007                 if (!validate_pathname($file_name)) {
1008                         die_error(400, "Invalid file parameter");
1009                 }
1010         }
1011
1012         our $file_parent = $input_params{'file_parent'};
1013         if (defined $file_parent) {
1014                 if (!validate_pathname($file_parent)) {
1015                         die_error(400, "Invalid file parent parameter");
1016                 }
1017         }
1018
1019         # parameters which are refnames
1020         our $hash = $input_params{'hash'};
1021         if (defined $hash) {
1022                 if (!validate_refname($hash)) {
1023                         die_error(400, "Invalid hash parameter");
1024                 }
1025         }
1026
1027         our $hash_parent = $input_params{'hash_parent'};
1028         if (defined $hash_parent) {
1029                 if (!validate_refname($hash_parent)) {
1030                         die_error(400, "Invalid hash parent parameter");
1031                 }
1032         }
1033
1034         our $hash_base = $input_params{'hash_base'};
1035         if (defined $hash_base) {
1036                 if (!validate_refname($hash_base)) {
1037                         die_error(400, "Invalid hash base parameter");
1038                 }
1039         }
1040
1041         our @extra_options = @{$input_params{'extra_options'}};
1042         # @extra_options is always defined, since it can only be (currently) set from
1043         # CGI, and $cgi->param() returns the empty array in array context if the param
1044         # is not set
1045         foreach my $opt (@extra_options) {
1046                 if (not exists $allowed_options{$opt}) {
1047                         die_error(400, "Invalid option parameter");
1048                 }
1049                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1050                         die_error(400, "Invalid option parameter for this action");
1051                 }
1052         }
1053
1054         our $hash_parent_base = $input_params{'hash_parent_base'};
1055         if (defined $hash_parent_base) {
1056                 if (!validate_refname($hash_parent_base)) {
1057                         die_error(400, "Invalid hash parent base parameter");
1058                 }
1059         }
1060
1061         # other parameters
1062         our $page = $input_params{'page'};
1063         if (defined $page) {
1064                 if ($page =~ m/[^0-9]/) {
1065                         die_error(400, "Invalid page parameter");
1066                 }
1067         }
1068
1069         our $searchtype = $input_params{'searchtype'};
1070         if (defined $searchtype) {
1071                 if ($searchtype =~ m/[^a-z]/) {
1072                         die_error(400, "Invalid searchtype parameter");
1073                 }
1074         }
1075
1076         our $search_use_regexp = $input_params{'search_use_regexp'};
1077
1078         our $searchtext = $input_params{'searchtext'};
1079         our $search_regexp;
1080         if (defined $searchtext) {
1081                 if (length($searchtext) < 2) {
1082                         die_error(403, "At least two characters are required for search parameter");
1083                 }
1084                 if ($search_use_regexp) {
1085                         $search_regexp = $searchtext;
1086                         if (!eval { qr/$search_regexp/; 1; }) {
1087                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1088                                 die_error(400, "Invalid search regexp '$search_regexp'",
1089                                           esc_html($error));
1090                         }
1091                 } else {
1092                         $search_regexp = quotemeta $searchtext;
1093                 }
1094         }
1095 }
1096
1097 # path to the current git repository
1098 our $git_dir;
1099 sub evaluate_git_dir {
1100         our $git_dir = "$projectroot/$project" if $project;
1101 }
1102
1103 our (@snapshot_fmts, $git_avatar);
1104 sub configure_gitweb_features {
1105         # list of supported snapshot formats
1106         our @snapshot_fmts = gitweb_get_feature('snapshot');
1107         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1108
1109         # check that the avatar feature is set to a known provider name,
1110         # and for each provider check if the dependencies are satisfied.
1111         # if the provider name is invalid or the dependencies are not met,
1112         # reset $git_avatar to the empty string.
1113         our ($git_avatar) = gitweb_get_feature('avatar');
1114         if ($git_avatar eq 'gravatar') {
1115                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1116         } elsif ($git_avatar eq 'picon') {
1117                 # no dependencies
1118         } else {
1119                 $git_avatar = '';
1120         }
1121 }
1122
1123 # custom error handler: 'die <message>' is Internal Server Error
1124 sub handle_errors_html {
1125         my $msg = shift; # it is already HTML escaped
1126
1127         # to avoid infinite loop where error occurs in die_error,
1128         # change handler to default handler, disabling handle_errors_html
1129         set_message("Error occured when inside die_error:\n$msg");
1130
1131         # you cannot jump out of die_error when called as error handler;
1132         # the subroutine set via CGI::Carp::set_message is called _after_
1133         # HTTP headers are already written, so it cannot write them itself
1134         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1135 }
1136 set_message(\&handle_errors_html);
1137
1138 # dispatch
1139 sub dispatch {
1140         if (!defined $action) {
1141                 if (defined $hash) {
1142                         $action = git_get_type($hash);
1143                         $action or die_error(404, "Object does not exist");
1144                 } elsif (defined $hash_base && defined $file_name) {
1145                         $action = git_get_type("$hash_base:$file_name");
1146                         $action or die_error(404, "File or directory does not exist");
1147                 } elsif (defined $project) {
1148                         $action = 'summary';
1149                 } else {
1150                         $action = 'project_list';
1151                 }
1152         }
1153         if (!defined($actions{$action})) {
1154                 die_error(400, "Unknown action");
1155         }
1156         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1157             !$project) {
1158                 die_error(400, "Project needed");
1159         }
1160         $actions{$action}->();
1161 }
1162
1163 sub reset_timer {
1164         our $t0 = [ gettimeofday() ]
1165                 if defined $t0;
1166         our $number_of_git_cmds = 0;
1167 }
1168
1169 our $first_request = 1;
1170 sub run_request {
1171         reset_timer();
1172
1173         evaluate_uri();
1174         if ($first_request) {
1175                 evaluate_gitweb_config();
1176                 evaluate_git_version();
1177         }
1178         if ($per_request_config) {
1179                 if (ref($per_request_config) eq 'CODE') {
1180                         $per_request_config->();
1181                 } elsif (!$first_request) {
1182                         evaluate_gitweb_config();
1183                 }
1184         }
1185         check_loadavg();
1186
1187         # $projectroot and $projects_list might be set in gitweb config file
1188         $projects_list ||= $projectroot;
1189
1190         evaluate_query_params();
1191         evaluate_path_info();
1192         evaluate_and_validate_params();
1193         evaluate_git_dir();
1194
1195         configure_gitweb_features();
1196
1197         dispatch();
1198 }
1199
1200 our $is_last_request = sub { 1 };
1201 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1202 our $CGI = 'CGI';
1203 our $cgi;
1204 sub configure_as_fcgi {
1205         require CGI::Fast;
1206         our $CGI = 'CGI::Fast';
1207
1208         my $request_number = 0;
1209         # let each child service 100 requests
1210         our $is_last_request = sub { ++$request_number > 100 };
1211 }
1212 sub evaluate_argv {
1213         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1214         configure_as_fcgi()
1215                 if $script_name =~ /\.fcgi$/;
1216
1217         return unless (@ARGV);
1218
1219         require Getopt::Long;
1220         Getopt::Long::GetOptions(
1221                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1222                 'nproc|n=i' => sub {
1223                         my ($arg, $val) = @_;
1224                         return unless eval { require FCGI::ProcManager; 1; };
1225                         my $proc_manager = FCGI::ProcManager->new({
1226                                 n_processes => $val,
1227                         });
1228                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1229                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1230                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1231                 },
1232         );
1233 }
1234
1235 sub run {
1236         evaluate_argv();
1237
1238         $first_request = 1;
1239         $pre_listen_hook->()
1240                 if $pre_listen_hook;
1241
1242  REQUEST:
1243         while ($cgi = $CGI->new()) {
1244                 $pre_dispatch_hook->()
1245                         if $pre_dispatch_hook;
1246
1247                 run_request();
1248
1249                 $post_dispatch_hook->()
1250                         if $post_dispatch_hook;
1251                 $first_request = 0;
1252
1253                 last REQUEST if ($is_last_request->());
1254         }
1255
1256  DONE_GITWEB:
1257         1;
1258 }
1259
1260 run();
1261
1262 if (defined caller) {
1263         # wrapped in a subroutine processing requests,
1264         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1265         return;
1266 } else {
1267         # pure CGI script, serving single request
1268         exit;
1269 }
1270
1271 ## ======================================================================
1272 ## action links
1273
1274 # possible values of extra options
1275 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1276 # -replay => 1      - start from a current view (replay with modifications)
1277 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1278 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1279 sub href {
1280         my %params = @_;
1281         # default is to use -absolute url() i.e. $my_uri
1282         my $href = $params{-full} ? $my_url : $my_uri;
1283
1284         # implicit -replay, must be first of implicit params
1285         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1286
1287         $params{'project'} = $project unless exists $params{'project'};
1288
1289         if ($params{-replay}) {
1290                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1291                         if (!exists $params{$name}) {
1292                                 $params{$name} = $input_params{$name};
1293                         }
1294                 }
1295         }
1296
1297         my $use_pathinfo = gitweb_check_feature('pathinfo');
1298         if (defined $params{'project'} &&
1299             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1300                 # try to put as many parameters as possible in PATH_INFO:
1301                 #   - project name
1302                 #   - action
1303                 #   - hash_parent or hash_parent_base:/file_parent
1304                 #   - hash or hash_base:/filename
1305                 #   - the snapshot_format as an appropriate suffix
1306
1307                 # When the script is the root DirectoryIndex for the domain,
1308                 # $href here would be something like http://gitweb.example.com/
1309                 # Thus, we strip any trailing / from $href, to spare us double
1310                 # slashes in the final URL
1311                 $href =~ s,/$,,;
1312
1313                 # Then add the project name, if present
1314                 $href .= "/".esc_path_info($params{'project'});
1315                 delete $params{'project'};
1316
1317                 # since we destructively absorb parameters, we keep this
1318                 # boolean that remembers if we're handling a snapshot
1319                 my $is_snapshot = $params{'action'} eq 'snapshot';
1320
1321                 # Summary just uses the project path URL, any other action is
1322                 # added to the URL
1323                 if (defined $params{'action'}) {
1324                         $href .= "/".esc_path_info($params{'action'})
1325                                 unless $params{'action'} eq 'summary';
1326                         delete $params{'action'};
1327                 }
1328
1329                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1330                 # stripping nonexistent or useless pieces
1331                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1332                         || $params{'hash_parent'} || $params{'hash'});
1333                 if (defined $params{'hash_base'}) {
1334                         if (defined $params{'hash_parent_base'}) {
1335                                 $href .= esc_path_info($params{'hash_parent_base'});
1336                                 # skip the file_parent if it's the same as the file_name
1337                                 if (defined $params{'file_parent'}) {
1338                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1339                                                 delete $params{'file_parent'};
1340                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1341                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1342                                                 delete $params{'file_parent'};
1343                                         }
1344                                 }
1345                                 $href .= "..";
1346                                 delete $params{'hash_parent'};
1347                                 delete $params{'hash_parent_base'};
1348                         } elsif (defined $params{'hash_parent'}) {
1349                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1350                                 delete $params{'hash_parent'};
1351                         }
1352
1353                         $href .= esc_path_info($params{'hash_base'});
1354                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1355                                 $href .= ":/".esc_path_info($params{'file_name'});
1356                                 delete $params{'file_name'};
1357                         }
1358                         delete $params{'hash'};
1359                         delete $params{'hash_base'};
1360                 } elsif (defined $params{'hash'}) {
1361                         $href .= esc_path_info($params{'hash'});
1362                         delete $params{'hash'};
1363                 }
1364
1365                 # If the action was a snapshot, we can absorb the
1366                 # snapshot_format parameter too
1367                 if ($is_snapshot) {
1368                         my $fmt = $params{'snapshot_format'};
1369                         # snapshot_format should always be defined when href()
1370                         # is called, but just in case some code forgets, we
1371                         # fall back to the default
1372                         $fmt ||= $snapshot_fmts[0];
1373                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1374                         delete $params{'snapshot_format'};
1375                 }
1376         }
1377
1378         # now encode the parameters explicitly
1379         my @result = ();
1380         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1381                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1382                 if (defined $params{$name}) {
1383                         if (ref($params{$name}) eq "ARRAY") {
1384                                 foreach my $par (@{$params{$name}}) {
1385                                         push @result, $symbol . "=" . esc_param($par);
1386                                 }
1387                         } else {
1388                                 push @result, $symbol . "=" . esc_param($params{$name});
1389                         }
1390                 }
1391         }
1392         $href .= "?" . join(';', @result) if scalar @result;
1393
1394         # final transformation: trailing spaces must be escaped (URI-encoded)
1395         $href =~ s/(\s+)$/CGI::escape($1)/e;
1396
1397         if ($params{-anchor}) {
1398                 $href .= "#".esc_param($params{-anchor});
1399         }
1400
1401         return $href;
1402 }
1403
1404
1405 ## ======================================================================
1406 ## validation, quoting/unquoting and escaping
1407
1408 sub validate_action {
1409         my $input = shift || return undef;
1410         return undef unless exists $actions{$input};
1411         return $input;
1412 }
1413
1414 sub validate_project {
1415         my $input = shift || return undef;
1416         if (!validate_pathname($input) ||
1417                 !(-d "$projectroot/$input") ||
1418                 !check_export_ok("$projectroot/$input") ||
1419                 ($strict_export && !project_in_list($input))) {
1420                 return undef;
1421         } else {
1422                 return $input;
1423         }
1424 }
1425
1426 sub validate_pathname {
1427         my $input = shift || return undef;
1428
1429         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1430         # at the beginning, at the end, and between slashes.
1431         # also this catches doubled slashes
1432         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1433                 return undef;
1434         }
1435         # no null characters
1436         if ($input =~ m!\0!) {
1437                 return undef;
1438         }
1439         return $input;
1440 }
1441
1442 sub validate_refname {
1443         my $input = shift || return undef;
1444
1445         # textual hashes are O.K.
1446         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1447                 return $input;
1448         }
1449         # it must be correct pathname
1450         $input = validate_pathname($input)
1451                 or return undef;
1452         # restrictions on ref name according to git-check-ref-format
1453         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1454                 return undef;
1455         }
1456         return $input;
1457 }
1458
1459 # decode sequences of octets in utf8 into Perl's internal form,
1460 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1461 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1462 sub to_utf8 {
1463         my $str = shift;
1464         return undef unless defined $str;
1465
1466         if (utf8::is_utf8($str) || utf8::decode($str)) {
1467                 return $str;
1468         } else {
1469                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1470         }
1471 }
1472
1473 # quote unsafe chars, but keep the slash, even when it's not
1474 # correct, but quoted slashes look too horrible in bookmarks
1475 sub esc_param {
1476         my $str = shift;
1477         return undef unless defined $str;
1478         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1479         $str =~ s/ /\+/g;
1480         return $str;
1481 }
1482
1483 # the quoting rules for path_info fragment are slightly different
1484 sub esc_path_info {
1485         my $str = shift;
1486         return undef unless defined $str;
1487
1488         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1489         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1490
1491         return $str;
1492 }
1493
1494 # quote unsafe chars in whole URL, so some characters cannot be quoted
1495 sub esc_url {
1496         my $str = shift;
1497         return undef unless defined $str;
1498         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1499         $str =~ s/ /\+/g;
1500         return $str;
1501 }
1502
1503 # quote unsafe characters in HTML attributes
1504 sub esc_attr {
1505
1506         # for XHTML conformance escaping '"' to '&quot;' is not enough
1507         return esc_html(@_);
1508 }
1509
1510 # replace invalid utf8 character with SUBSTITUTION sequence
1511 sub esc_html {
1512         my $str = shift;
1513         my %opts = @_;
1514
1515         return undef unless defined $str;
1516
1517         $str = to_utf8($str);
1518         $str = $cgi->escapeHTML($str);
1519         if ($opts{'-nbsp'}) {
1520                 $str =~ s/ /&nbsp;/g;
1521         }
1522         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1523         return $str;
1524 }
1525
1526 # quote control characters and escape filename to HTML
1527 sub esc_path {
1528         my $str = shift;
1529         my %opts = @_;
1530
1531         return undef unless defined $str;
1532
1533         $str = to_utf8($str);
1534         $str = $cgi->escapeHTML($str);
1535         if ($opts{'-nbsp'}) {
1536                 $str =~ s/ /&nbsp;/g;
1537         }
1538         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1539         return $str;
1540 }
1541
1542 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1543 sub sanitize {
1544         my $str = shift;
1545
1546         return undef unless defined $str;
1547
1548         $str = to_utf8($str);
1549         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1550         return $str;
1551 }
1552
1553 # Make control characters "printable", using character escape codes (CEC)
1554 sub quot_cec {
1555         my $cntrl = shift;
1556         my %opts = @_;
1557         my %es = ( # character escape codes, aka escape sequences
1558                 "\t" => '\t',   # tab            (HT)
1559                 "\n" => '\n',   # line feed      (LF)
1560                 "\r" => '\r',   # carrige return (CR)
1561                 "\f" => '\f',   # form feed      (FF)
1562                 "\b" => '\b',   # backspace      (BS)
1563                 "\a" => '\a',   # alarm (bell)   (BEL)
1564                 "\e" => '\e',   # escape         (ESC)
1565                 "\013" => '\v', # vertical tab   (VT)
1566                 "\000" => '\0', # nul character  (NUL)
1567         );
1568         my $chr = ( (exists $es{$cntrl})
1569                     ? $es{$cntrl}
1570                     : sprintf('\%2x', ord($cntrl)) );
1571         if ($opts{-nohtml}) {
1572                 return $chr;
1573         } else {
1574                 return "<span class=\"cntrl\">$chr</span>";
1575         }
1576 }
1577
1578 # Alternatively use unicode control pictures codepoints,
1579 # Unicode "printable representation" (PR)
1580 sub quot_upr {
1581         my $cntrl = shift;
1582         my %opts = @_;
1583
1584         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1585         if ($opts{-nohtml}) {
1586                 return $chr;
1587         } else {
1588                 return "<span class=\"cntrl\">$chr</span>";
1589         }
1590 }
1591
1592 # git may return quoted and escaped filenames
1593 sub unquote {
1594         my $str = shift;
1595
1596         sub unq {
1597                 my $seq = shift;
1598                 my %es = ( # character escape codes, aka escape sequences
1599                         't' => "\t",   # tab            (HT, TAB)
1600                         'n' => "\n",   # newline        (NL)
1601                         'r' => "\r",   # return         (CR)
1602                         'f' => "\f",   # form feed      (FF)
1603                         'b' => "\b",   # backspace      (BS)
1604                         'a' => "\a",   # alarm (bell)   (BEL)
1605                         'e' => "\e",   # escape         (ESC)
1606                         'v' => "\013", # vertical tab   (VT)
1607                 );
1608
1609                 if ($seq =~ m/^[0-7]{1,3}$/) {
1610                         # octal char sequence
1611                         return chr(oct($seq));
1612                 } elsif (exists $es{$seq}) {
1613                         # C escape sequence, aka character escape code
1614                         return $es{$seq};
1615                 }
1616                 # quoted ordinary character
1617                 return $seq;
1618         }
1619
1620         if ($str =~ m/^"(.*)"$/) {
1621                 # needs unquoting
1622                 $str = $1;
1623                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1624         }
1625         return $str;
1626 }
1627
1628 # escape tabs (convert tabs to spaces)
1629 sub untabify {
1630         my $line = shift;
1631
1632         while ((my $pos = index($line, "\t")) != -1) {
1633                 if (my $count = (8 - ($pos % 8))) {
1634                         my $spaces = ' ' x $count;
1635                         $line =~ s/\t/$spaces/;
1636                 }
1637         }
1638
1639         return $line;
1640 }
1641
1642 sub project_in_list {
1643         my $project = shift;
1644         my @list = git_get_projects_list();
1645         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1646 }
1647
1648 ## ----------------------------------------------------------------------
1649 ## HTML aware string manipulation
1650
1651 # Try to chop given string on a word boundary between position
1652 # $len and $len+$add_len. If there is no word boundary there,
1653 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1654 # (marking chopped part) would be longer than given string.
1655 sub chop_str {
1656         my $str = shift;
1657         my $len = shift;
1658         my $add_len = shift || 10;
1659         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1660
1661         # Make sure perl knows it is utf8 encoded so we don't
1662         # cut in the middle of a utf8 multibyte char.
1663         $str = to_utf8($str);
1664
1665         # allow only $len chars, but don't cut a word if it would fit in $add_len
1666         # if it doesn't fit, cut it if it's still longer than the dots we would add
1667         # remove chopped character entities entirely
1668
1669         # when chopping in the middle, distribute $len into left and right part
1670         # return early if chopping wouldn't make string shorter
1671         if ($where eq 'center') {
1672                 return $str if ($len + 5 >= length($str)); # filler is length 5
1673                 $len = int($len/2);
1674         } else {
1675                 return $str if ($len + 4 >= length($str)); # filler is length 4
1676         }
1677
1678         # regexps: ending and beginning with word part up to $add_len
1679         my $endre = qr/.{$len}\w{0,$add_len}/;
1680         my $begre = qr/\w{0,$add_len}.{$len}/;
1681
1682         if ($where eq 'left') {
1683                 $str =~ m/^(.*?)($begre)$/;
1684                 my ($lead, $body) = ($1, $2);
1685                 if (length($lead) > 4) {
1686                         $lead = " ...";
1687                 }
1688                 return "$lead$body";
1689
1690         } elsif ($where eq 'center') {
1691                 $str =~ m/^($endre)(.*)$/;
1692                 my ($left, $str)  = ($1, $2);
1693                 $str =~ m/^(.*?)($begre)$/;
1694                 my ($mid, $right) = ($1, $2);
1695                 if (length($mid) > 5) {
1696                         $mid = " ... ";
1697                 }
1698                 return "$left$mid$right";
1699
1700         } else {
1701                 $str =~ m/^($endre)(.*)$/;
1702                 my $body = $1;
1703                 my $tail = $2;
1704                 if (length($tail) > 4) {
1705                         $tail = "... ";
1706                 }
1707                 return "$body$tail";
1708         }
1709 }
1710
1711 # takes the same arguments as chop_str, but also wraps a <span> around the
1712 # result with a title attribute if it does get chopped. Additionally, the
1713 # string is HTML-escaped.
1714 sub chop_and_escape_str {
1715         my ($str) = @_;
1716
1717         my $chopped = chop_str(@_);
1718         $str = to_utf8($str);
1719         if ($chopped eq $str) {
1720                 return esc_html($chopped);
1721         } else {
1722                 $str =~ s/[[:cntrl:]]/?/g;
1723                 return $cgi->span({-title=>$str}, esc_html($chopped));
1724         }
1725 }
1726
1727 # Highlight selected fragments of string, using given CSS class,
1728 # and escape HTML.  It is assumed that fragments do not overlap.
1729 # Regions are passed as list of pairs (array references).
1730 #
1731 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1732 # '<span class="mark">foo</span>bar'
1733 sub esc_html_hl_regions {
1734         my ($str, $css_class, @sel) = @_;
1735         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1736         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1737         return esc_html($str, %opts) unless @sel;
1738
1739         my $out = '';
1740         my $pos = 0;
1741
1742         for my $s (@sel) {
1743                 my ($begin, $end) = @$s;
1744
1745                 # Don't create empty <span> elements.
1746                 next if $end <= $begin;
1747
1748                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1749                                        %opts);
1750
1751                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1752                         if ($begin - $pos > 0);
1753                 $out .= $cgi->span({-class => $css_class}, $escaped);
1754
1755                 $pos = $end;
1756         }
1757         $out .= esc_html(substr($str, $pos), %opts)
1758                 if ($pos < length($str));
1759
1760         return $out;
1761 }
1762
1763 # return positions of beginning and end of each match
1764 sub matchpos_list {
1765         my ($str, $regexp) = @_;
1766         return unless (defined $str && defined $regexp);
1767
1768         my @matches;
1769         while ($str =~ /$regexp/g) {
1770                 push @matches, [$-[0], $+[0]];
1771         }
1772         return @matches;
1773 }
1774
1775 # highlight match (if any), and escape HTML
1776 sub esc_html_match_hl {
1777         my ($str, $regexp) = @_;
1778         return esc_html($str) unless defined $regexp;
1779
1780         my @matches = matchpos_list($str, $regexp);
1781         return esc_html($str) unless @matches;
1782
1783         return esc_html_hl_regions($str, 'match', @matches);
1784 }
1785
1786
1787 # highlight match (if any) of shortened string, and escape HTML
1788 sub esc_html_match_hl_chopped {
1789         my ($str, $chopped, $regexp) = @_;
1790         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1791
1792         my @matches = matchpos_list($str, $regexp);
1793         return esc_html($chopped) unless @matches;
1794
1795         # filter matches so that we mark chopped string
1796         my $tail = "... "; # see chop_str
1797         unless ($chopped =~ s/\Q$tail\E$//) {
1798                 $tail = '';
1799         }
1800         my $chop_len = length($chopped);
1801         my $tail_len = length($tail);
1802         my @filtered;
1803
1804         for my $m (@matches) {
1805                 if ($m->[0] > $chop_len) {
1806                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1807                         last;
1808                 } elsif ($m->[1] > $chop_len) {
1809                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1810                         last;
1811                 }
1812                 push @filtered, $m;
1813         }
1814
1815         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1816 }
1817
1818 ## ----------------------------------------------------------------------
1819 ## functions returning short strings
1820
1821 # CSS class for given age value (in seconds)
1822 sub age_class {
1823         my $age = shift;
1824
1825         if (!defined $age) {
1826                 return "noage";
1827         } elsif ($age < 60*60*2) {
1828                 return "age0";
1829         } elsif ($age < 60*60*24*2) {
1830                 return "age1";
1831         } else {
1832                 return "age2";
1833         }
1834 }
1835
1836 # convert age in seconds to "nn units ago" string
1837 sub age_string {
1838         my $age = shift;
1839         my $age_str;
1840
1841         if ($age > 60*60*24*365*2) {
1842                 $age_str = (int $age/60/60/24/365);
1843                 $age_str .= " years ago";
1844         } elsif ($age > 60*60*24*(365/12)*2) {
1845                 $age_str = int $age/60/60/24/(365/12);
1846                 $age_str .= " months ago";
1847         } elsif ($age > 60*60*24*7*2) {
1848                 $age_str = int $age/60/60/24/7;
1849                 $age_str .= " weeks ago";
1850         } elsif ($age > 60*60*24*2) {
1851                 $age_str = int $age/60/60/24;
1852                 $age_str .= " days ago";
1853         } elsif ($age > 60*60*2) {
1854                 $age_str = int $age/60/60;
1855                 $age_str .= " hours ago";
1856         } elsif ($age > 60*2) {
1857                 $age_str = int $age/60;
1858                 $age_str .= " min ago";
1859         } elsif ($age > 2) {
1860                 $age_str = int $age;
1861                 $age_str .= " sec ago";
1862         } else {
1863                 $age_str .= " right now";
1864         }
1865         return $age_str;
1866 }
1867
1868 use constant {
1869         S_IFINVALID => 0030000,
1870         S_IFGITLINK => 0160000,
1871 };
1872
1873 # submodule/subproject, a commit object reference
1874 sub S_ISGITLINK {
1875         my $mode = shift;
1876
1877         return (($mode & S_IFMT) == S_IFGITLINK)
1878 }
1879
1880 # convert file mode in octal to symbolic file mode string
1881 sub mode_str {
1882         my $mode = oct shift;
1883
1884         if (S_ISGITLINK($mode)) {
1885                 return 'm---------';
1886         } elsif (S_ISDIR($mode & S_IFMT)) {
1887                 return 'drwxr-xr-x';
1888         } elsif (S_ISLNK($mode)) {
1889                 return 'lrwxrwxrwx';
1890         } elsif (S_ISREG($mode)) {
1891                 # git cares only about the executable bit
1892                 if ($mode & S_IXUSR) {
1893                         return '-rwxr-xr-x';
1894                 } else {
1895                         return '-rw-r--r--';
1896                 };
1897         } else {
1898                 return '----------';
1899         }
1900 }
1901
1902 # convert file mode in octal to file type string
1903 sub file_type {
1904         my $mode = shift;
1905
1906         if ($mode !~ m/^[0-7]+$/) {
1907                 return $mode;
1908         } else {
1909                 $mode = oct $mode;
1910         }
1911
1912         if (S_ISGITLINK($mode)) {
1913                 return "submodule";
1914         } elsif (S_ISDIR($mode & S_IFMT)) {
1915                 return "directory";
1916         } elsif (S_ISLNK($mode)) {
1917                 return "symlink";
1918         } elsif (S_ISREG($mode)) {
1919                 return "file";
1920         } else {
1921                 return "unknown";
1922         }
1923 }
1924
1925 # convert file mode in octal to file type description string
1926 sub file_type_long {
1927         my $mode = shift;
1928
1929         if ($mode !~ m/^[0-7]+$/) {
1930                 return $mode;
1931         } else {
1932                 $mode = oct $mode;
1933         }
1934
1935         if (S_ISGITLINK($mode)) {
1936                 return "submodule";
1937         } elsif (S_ISDIR($mode & S_IFMT)) {
1938                 return "directory";
1939         } elsif (S_ISLNK($mode)) {
1940                 return "symlink";
1941         } elsif (S_ISREG($mode)) {
1942                 if ($mode & S_IXUSR) {
1943                         return "executable";
1944                 } else {
1945                         return "file";
1946                 };
1947         } else {
1948                 return "unknown";
1949         }
1950 }
1951
1952
1953 ## ----------------------------------------------------------------------
1954 ## functions returning short HTML fragments, or transforming HTML fragments
1955 ## which don't belong to other sections
1956
1957 # format line of commit message.
1958 sub format_log_line_html {
1959         my $line = shift;
1960
1961         $line = esc_html($line, -nbsp=>1);
1962         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1963                 $cgi->a({-href => href(action=>"object", hash=>$1),
1964                                         -class => "text"}, $1);
1965         }eg;
1966
1967         return $line;
1968 }
1969
1970 # format marker of refs pointing to given object
1971
1972 # the destination action is chosen based on object type and current context:
1973 # - for annotated tags, we choose the tag view unless it's the current view
1974 #   already, in which case we go to shortlog view
1975 # - for other refs, we keep the current view if we're in history, shortlog or
1976 #   log view, and select shortlog otherwise
1977 sub format_ref_marker {
1978         my ($refs, $id) = @_;
1979         my $markers = '';
1980
1981         if (defined $refs->{$id}) {
1982                 foreach my $ref (@{$refs->{$id}}) {
1983                         # this code exploits the fact that non-lightweight tags are the
1984                         # only indirect objects, and that they are the only objects for which
1985                         # we want to use tag instead of shortlog as action
1986                         my ($type, $name) = qw();
1987                         my $indirect = ($ref =~ s/\^\{\}$//);
1988                         # e.g. tags/v2.6.11 or heads/next
1989                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1990                                 $type = $1;
1991                                 $name = $2;
1992                         } else {
1993                                 $type = "ref";
1994                                 $name = $ref;
1995                         }
1996
1997                         my $class = $type;
1998                         $class .= " indirect" if $indirect;
1999
2000                         my $dest_action = "shortlog";
2001
2002                         if ($indirect) {
2003                                 $dest_action = "tag" unless $action eq "tag";
2004                         } elsif ($action =~ /^(history|(short)?log)$/) {
2005                                 $dest_action = $action;
2006                         }
2007
2008                         my $dest = "";
2009                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2010                         $dest .= $ref;
2011
2012                         my $link = $cgi->a({
2013                                 -href => href(
2014                                         action=>$dest_action,
2015                                         hash=>$dest
2016                                 )}, $name);
2017
2018                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2019                                 $link . "</span>";
2020                 }
2021         }
2022
2023         if ($markers) {
2024                 return ' <span class="refs">'. $markers . '</span>';
2025         } else {
2026                 return "";
2027         }
2028 }
2029
2030 # format, perhaps shortened and with markers, title line
2031 sub format_subject_html {
2032         my ($long, $short, $href, $extra) = @_;
2033         $extra = '' unless defined($extra);
2034
2035         if (length($short) < length($long)) {
2036                 $long =~ s/[[:cntrl:]]/?/g;
2037                 return $cgi->a({-href => $href, -class => "list subject",
2038                                 -title => to_utf8($long)},
2039                        esc_html($short)) . $extra;
2040         } else {
2041                 return $cgi->a({-href => $href, -class => "list subject"},
2042                        esc_html($long)) . $extra;
2043         }
2044 }
2045
2046 # Rather than recomputing the url for an email multiple times, we cache it
2047 # after the first hit. This gives a visible benefit in views where the avatar
2048 # for the same email is used repeatedly (e.g. shortlog).
2049 # The cache is shared by all avatar engines (currently gravatar only), which
2050 # are free to use it as preferred. Since only one avatar engine is used for any
2051 # given page, there's no risk for cache conflicts.
2052 our %avatar_cache = ();
2053
2054 # Compute the picon url for a given email, by using the picon search service over at
2055 # http://www.cs.indiana.edu/picons/search.html
2056 sub picon_url {
2057         my $email = lc shift;
2058         if (!$avatar_cache{$email}) {
2059                 my ($user, $domain) = split('@', $email);
2060                 $avatar_cache{$email} =
2061                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2062                         "$domain/$user/" .
2063                         "users+domains+unknown/up/single";
2064         }
2065         return $avatar_cache{$email};
2066 }
2067
2068 # Compute the gravatar url for a given email, if it's not in the cache already.
2069 # Gravatar stores only the part of the URL before the size, since that's the
2070 # one computationally more expensive. This also allows reuse of the cache for
2071 # different sizes (for this particular engine).
2072 sub gravatar_url {
2073         my $email = lc shift;
2074         my $size = shift;
2075         $avatar_cache{$email} ||=
2076                 "http://www.gravatar.com/avatar/" .
2077                         Digest::MD5::md5_hex($email) . "?s=";
2078         return $avatar_cache{$email} . $size;
2079 }
2080
2081 # Insert an avatar for the given $email at the given $size if the feature
2082 # is enabled.
2083 sub git_get_avatar {
2084         my ($email, %opts) = @_;
2085         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2086         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2087         $opts{-size} ||= 'default';
2088         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2089         my $url = "";
2090         if ($git_avatar eq 'gravatar') {
2091                 $url = gravatar_url($email, $size);
2092         } elsif ($git_avatar eq 'picon') {
2093                 $url = picon_url($email);
2094         }
2095         # Other providers can be added by extending the if chain, defining $url
2096         # as needed. If no variant puts something in $url, we assume avatars
2097         # are completely disabled/unavailable.
2098         if ($url) {
2099                 return $pre_white .
2100                        "<img width=\"$size\" " .
2101                             "class=\"avatar\" " .
2102                             "src=\"".esc_url($url)."\" " .
2103                             "alt=\"\" " .
2104                        "/>" . $post_white;
2105         } else {
2106                 return "";
2107         }
2108 }
2109
2110 sub format_search_author {
2111         my ($author, $searchtype, $displaytext) = @_;
2112         my $have_search = gitweb_check_feature('search');
2113
2114         if ($have_search) {
2115                 my $performed = "";
2116                 if ($searchtype eq 'author') {
2117                         $performed = "authored";
2118                 } elsif ($searchtype eq 'committer') {
2119                         $performed = "committed";
2120                 }
2121
2122                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2123                                 searchtext=>$author,
2124                                 searchtype=>$searchtype), class=>"list",
2125                                 title=>"Search for commits $performed by $author"},
2126                                 $displaytext);
2127
2128         } else {
2129                 return $displaytext;
2130         }
2131 }
2132
2133 # format the author name of the given commit with the given tag
2134 # the author name is chopped and escaped according to the other
2135 # optional parameters (see chop_str).
2136 sub format_author_html {
2137         my $tag = shift;
2138         my $co = shift;
2139         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2140         return "<$tag class=\"author\">" .
2141                format_search_author($co->{'author_name'}, "author",
2142                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2143                        $author) .
2144                "</$tag>";
2145 }
2146
2147 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2148 sub format_git_diff_header_line {
2149         my $line = shift;
2150         my $diffinfo = shift;
2151         my ($from, $to) = @_;
2152
2153         if ($diffinfo->{'nparents'}) {
2154                 # combined diff
2155                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2156                 if ($to->{'href'}) {
2157                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2158                                          esc_path($to->{'file'}));
2159                 } else { # file was deleted (no href)
2160                         $line .= esc_path($to->{'file'});
2161                 }
2162         } else {
2163                 # "ordinary" diff
2164                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2165                 if ($from->{'href'}) {
2166                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2167                                          'a/' . esc_path($from->{'file'}));
2168                 } else { # file was added (no href)
2169                         $line .= 'a/' . esc_path($from->{'file'});
2170                 }
2171                 $line .= ' ';
2172                 if ($to->{'href'}) {
2173                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2174                                          'b/' . esc_path($to->{'file'}));
2175                 } else { # file was deleted
2176                         $line .= 'b/' . esc_path($to->{'file'});
2177                 }
2178         }
2179
2180         return "<div class=\"diff header\">$line</div>\n";
2181 }
2182
2183 # format extended diff header line, before patch itself
2184 sub format_extended_diff_header_line {
2185         my $line = shift;
2186         my $diffinfo = shift;
2187         my ($from, $to) = @_;
2188
2189         # match <path>
2190         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2191                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2192                                        esc_path($from->{'file'}));
2193         }
2194         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2195                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2196                                  esc_path($to->{'file'}));
2197         }
2198         # match single <mode>
2199         if ($line =~ m/\s(\d{6})$/) {
2200                 $line .= '<span class="info"> (' .
2201                          file_type_long($1) .
2202                          ')</span>';
2203         }
2204         # match <hash>
2205         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2206                 # can match only for combined diff
2207                 $line = 'index ';
2208                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2209                         if ($from->{'href'}[$i]) {
2210                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2211                                                   -class=>"hash"},
2212                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2213                         } else {
2214                                 $line .= '0' x 7;
2215                         }
2216                         # separator
2217                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2218                 }
2219                 $line .= '..';
2220                 if ($to->{'href'}) {
2221                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2222                                          substr($diffinfo->{'to_id'},0,7));
2223                 } else {
2224                         $line .= '0' x 7;
2225                 }
2226
2227         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2228                 # can match only for ordinary diff
2229                 my ($from_link, $to_link);
2230                 if ($from->{'href'}) {
2231                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2232                                              substr($diffinfo->{'from_id'},0,7));
2233                 } else {
2234                         $from_link = '0' x 7;
2235                 }
2236                 if ($to->{'href'}) {
2237                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2238                                            substr($diffinfo->{'to_id'},0,7));
2239                 } else {
2240                         $to_link = '0' x 7;
2241                 }
2242                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2243                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2244         }
2245
2246         return $line . "<br/>\n";
2247 }
2248
2249 # format from-file/to-file diff header
2250 sub format_diff_from_to_header {
2251         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2252         my $line;
2253         my $result = '';
2254
2255         $line = $from_line;
2256         #assert($line =~ m/^---/) if DEBUG;
2257         # no extra formatting for "^--- /dev/null"
2258         if (! $diffinfo->{'nparents'}) {
2259                 # ordinary (single parent) diff
2260                 if ($line =~ m!^--- "?a/!) {
2261                         if ($from->{'href'}) {
2262                                 $line = '--- a/' .
2263                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2264                                                 esc_path($from->{'file'}));
2265                         } else {
2266                                 $line = '--- a/' .
2267                                         esc_path($from->{'file'});
2268                         }
2269                 }
2270                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2271
2272         } else {
2273                 # combined diff (merge commit)
2274                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2275                         if ($from->{'href'}[$i]) {
2276                                 $line = '--- ' .
2277                                         $cgi->a({-href=>href(action=>"blobdiff",
2278                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2279                                                              hash_parent_base=>$parents[$i],
2280                                                              file_parent=>$from->{'file'}[$i],
2281                                                              hash=>$diffinfo->{'to_id'},
2282                                                              hash_base=>$hash,
2283                                                              file_name=>$to->{'file'}),
2284                                                  -class=>"path",
2285                                                  -title=>"diff" . ($i+1)},
2286                                                 $i+1) .
2287                                         '/' .
2288                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2289                                                 esc_path($from->{'file'}[$i]));
2290                         } else {
2291                                 $line = '--- /dev/null';
2292                         }
2293                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2294                 }
2295         }
2296
2297         $line = $to_line;
2298         #assert($line =~ m/^\+\+\+/) if DEBUG;
2299         # no extra formatting for "^+++ /dev/null"
2300         if ($line =~ m!^\+\+\+ "?b/!) {
2301                 if ($to->{'href'}) {
2302                         $line = '+++ b/' .
2303                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2304                                         esc_path($to->{'file'}));
2305                 } else {
2306                         $line = '+++ b/' .
2307                                 esc_path($to->{'file'});
2308                 }
2309         }
2310         $result .= qq!<div class="diff to_file">$line</div>\n!;
2311
2312         return $result;
2313 }
2314
2315 # create note for patch simplified by combined diff
2316 sub format_diff_cc_simplified {
2317         my ($diffinfo, @parents) = @_;
2318         my $result = '';
2319
2320         $result .= "<div class=\"diff header\">" .
2321                    "diff --cc ";
2322         if (!is_deleted($diffinfo)) {
2323                 $result .= $cgi->a({-href => href(action=>"blob",
2324                                                   hash_base=>$hash,
2325                                                   hash=>$diffinfo->{'to_id'},
2326                                                   file_name=>$diffinfo->{'to_file'}),
2327                                     -class => "path"},
2328                                    esc_path($diffinfo->{'to_file'}));
2329         } else {
2330                 $result .= esc_path($diffinfo->{'to_file'});
2331         }
2332         $result .= "</div>\n" . # class="diff header"
2333                    "<div class=\"diff nodifferences\">" .
2334                    "Simple merge" .
2335                    "</div>\n"; # class="diff nodifferences"
2336
2337         return $result;
2338 }
2339
2340 sub diff_line_class {
2341         my ($line, $from, $to) = @_;
2342
2343         # ordinary diff
2344         my $num_sign = 1;
2345         # combined diff
2346         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2347                 $num_sign = scalar @{$from->{'href'}};
2348         }
2349
2350         my @diff_line_classifier = (
2351                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2352                 { regexp => qr/^\\/,               class => "incomplete"  },
2353                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2354                 # classifier for context must come before classifier add/rem,
2355                 # or we would have to use more complicated regexp, for example
2356                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2357                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2358                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2359         );
2360         for my $clsfy (@diff_line_classifier) {
2361                 return $clsfy->{'class'}
2362                         if ($line =~ $clsfy->{'regexp'});
2363         }
2364
2365         # fallback
2366         return "";
2367 }
2368
2369 # assumes that $from and $to are defined and correctly filled,
2370 # and that $line holds a line of chunk header for unified diff
2371 sub format_unidiff_chunk_header {
2372         my ($line, $from, $to) = @_;
2373
2374         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2375                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2376
2377         $from_lines = 0 unless defined $from_lines;
2378         $to_lines   = 0 unless defined $to_lines;
2379
2380         if ($from->{'href'}) {
2381                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2382                                      -class=>"list"}, $from_text);
2383         }
2384         if ($to->{'href'}) {
2385                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2386                                      -class=>"list"}, $to_text);
2387         }
2388         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2389                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2390         return $line;
2391 }
2392
2393 # assumes that $from and $to are defined and correctly filled,
2394 # and that $line holds a line of chunk header for combined diff
2395 sub format_cc_diff_chunk_header {
2396         my ($line, $from, $to) = @_;
2397
2398         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2399         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2400
2401         @from_text = split(' ', $ranges);
2402         for (my $i = 0; $i < @from_text; ++$i) {
2403                 ($from_start[$i], $from_nlines[$i]) =
2404                         (split(',', substr($from_text[$i], 1)), 0);
2405         }
2406
2407         $to_text   = pop @from_text;
2408         $to_start  = pop @from_start;
2409         $to_nlines = pop @from_nlines;
2410
2411         $line = "<span class=\"chunk_info\">$prefix ";
2412         for (my $i = 0; $i < @from_text; ++$i) {
2413                 if ($from->{'href'}[$i]) {
2414                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2415                                           -class=>"list"}, $from_text[$i]);
2416                 } else {
2417                         $line .= $from_text[$i];
2418                 }
2419                 $line .= " ";
2420         }
2421         if ($to->{'href'}) {
2422                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2423                                   -class=>"list"}, $to_text);
2424         } else {
2425                 $line .= $to_text;
2426         }
2427         $line .= " $prefix</span>" .
2428                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2429         return $line;
2430 }
2431
2432 # process patch (diff) line (not to be used for diff headers),
2433 # returning HTML-formatted (but not wrapped) line.
2434 # If the line is passed as a reference, it is treated as HTML and not
2435 # esc_html()'ed.
2436 sub format_diff_line {
2437         my ($line, $diff_class, $from, $to) = @_;
2438
2439         if (ref($line)) {
2440                 $line = $$line;
2441         } else {
2442                 chomp $line;
2443                 $line = untabify($line);
2444
2445                 if ($from && $to && $line =~ m/^\@{2} /) {
2446                         $line = format_unidiff_chunk_header($line, $from, $to);
2447                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2448                         $line = format_cc_diff_chunk_header($line, $from, $to);
2449                 } else {
2450                         $line = esc_html($line, -nbsp=>1);
2451                 }
2452         }
2453
2454         my $diff_classes = "diff";
2455         $diff_classes .= " $diff_class" if ($diff_class);
2456         $line = "<div class=\"$diff_classes\">$line</div>\n";
2457
2458         return $line;
2459 }
2460
2461 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2462 # linked.  Pass the hash of the tree/commit to snapshot.
2463 sub format_snapshot_links {
2464         my ($hash) = @_;
2465         my $num_fmts = @snapshot_fmts;
2466         if ($num_fmts > 1) {
2467                 # A parenthesized list of links bearing format names.
2468                 # e.g. "snapshot (_tar.gz_ _zip_)"
2469                 return "snapshot (" . join(' ', map
2470                         $cgi->a({
2471                                 -href => href(
2472                                         action=>"snapshot",
2473                                         hash=>$hash,
2474                                         snapshot_format=>$_
2475                                 )
2476                         }, $known_snapshot_formats{$_}{'display'})
2477                 , @snapshot_fmts) . ")";
2478         } elsif ($num_fmts == 1) {
2479                 # A single "snapshot" link whose tooltip bears the format name.
2480                 # i.e. "_snapshot_"
2481                 my ($fmt) = @snapshot_fmts;
2482                 return
2483                         $cgi->a({
2484                                 -href => href(
2485                                         action=>"snapshot",
2486                                         hash=>$hash,
2487                                         snapshot_format=>$fmt
2488                                 ),
2489                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2490                         }, "snapshot");
2491         } else { # $num_fmts == 0
2492                 return undef;
2493         }
2494 }
2495
2496 ## ......................................................................
2497 ## functions returning values to be passed, perhaps after some
2498 ## transformation, to other functions; e.g. returning arguments to href()
2499
2500 # returns hash to be passed to href to generate gitweb URL
2501 # in -title key it returns description of link
2502 sub get_feed_info {
2503         my $format = shift || 'Atom';
2504         my %res = (action => lc($format));
2505
2506         # feed links are possible only for project views
2507         return unless (defined $project);
2508         # some views should link to OPML, or to generic project feed,
2509         # or don't have specific feed yet (so they should use generic)
2510         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2511
2512         my $branch;
2513         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2514         # from tag links; this also makes possible to detect branch links
2515         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2516             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2517                 $branch = $1;
2518         }
2519         # find log type for feed description (title)
2520         my $type = 'log';
2521         if (defined $file_name) {
2522                 $type  = "history of $file_name";
2523                 $type .= "/" if ($action eq 'tree');
2524                 $type .= " on '$branch'" if (defined $branch);
2525         } else {
2526                 $type = "log of $branch" if (defined $branch);
2527         }
2528
2529         $res{-title} = $type;
2530         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2531         $res{'file_name'} = $file_name;
2532
2533         return %res;
2534 }
2535
2536 ## ----------------------------------------------------------------------
2537 ## git utility subroutines, invoking git commands
2538
2539 # returns path to the core git executable and the --git-dir parameter as list
2540 sub git_cmd {
2541         $number_of_git_cmds++;
2542         return $GIT, '--git-dir='.$git_dir;
2543 }
2544
2545 # quote the given arguments for passing them to the shell
2546 # quote_command("command", "arg 1", "arg with ' and ! characters")
2547 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2548 # Try to avoid using this function wherever possible.
2549 sub quote_command {
2550         return join(' ',
2551                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2552 }
2553
2554 # get HEAD ref of given project as hash
2555 sub git_get_head_hash {
2556         return git_get_full_hash(shift, 'HEAD');
2557 }
2558
2559 sub git_get_full_hash {
2560         return git_get_hash(@_);
2561 }
2562
2563 sub git_get_short_hash {
2564         return git_get_hash(@_, '--short=7');
2565 }
2566
2567 sub git_get_hash {
2568         my ($project, $hash, @options) = @_;
2569         my $o_git_dir = $git_dir;
2570         my $retval = undef;
2571         $git_dir = "$projectroot/$project";
2572         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2573             '--verify', '-q', @options, $hash) {
2574                 $retval = <$fd>;
2575                 chomp $retval if defined $retval;
2576                 close $fd;
2577         }
2578         if (defined $o_git_dir) {
2579                 $git_dir = $o_git_dir;
2580         }
2581         return $retval;
2582 }
2583
2584 # get type of given object
2585 sub git_get_type {
2586         my $hash = shift;
2587
2588         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2589         my $type = <$fd>;
2590         close $fd or return;
2591         chomp $type;
2592         return $type;
2593 }
2594
2595 # repository configuration
2596 our $config_file = '';
2597 our %config;
2598
2599 # store multiple values for single key as anonymous array reference
2600 # single values stored directly in the hash, not as [ <value> ]
2601 sub hash_set_multi {
2602         my ($hash, $key, $value) = @_;
2603
2604         if (!exists $hash->{$key}) {
2605                 $hash->{$key} = $value;
2606         } elsif (!ref $hash->{$key}) {
2607                 $hash->{$key} = [ $hash->{$key}, $value ];
2608         } else {
2609                 push @{$hash->{$key}}, $value;
2610         }
2611 }
2612
2613 # return hash of git project configuration
2614 # optionally limited to some section, e.g. 'gitweb'
2615 sub git_parse_project_config {
2616         my $section_regexp = shift;
2617         my %config;
2618
2619         local $/ = "\0";
2620
2621         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2622                 or return;
2623
2624         while (my $keyval = <$fh>) {
2625                 chomp $keyval;
2626                 my ($key, $value) = split(/\n/, $keyval, 2);
2627
2628                 hash_set_multi(\%config, $key, $value)
2629                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2630         }
2631         close $fh;
2632
2633         return %config;
2634 }
2635
2636 # convert config value to boolean: 'true' or 'false'
2637 # no value, number > 0, 'true' and 'yes' values are true
2638 # rest of values are treated as false (never as error)
2639 sub config_to_bool {
2640         my $val = shift;
2641
2642         return 1 if !defined $val;             # section.key
2643
2644         # strip leading and trailing whitespace
2645         $val =~ s/^\s+//;
2646         $val =~ s/\s+$//;
2647
2648         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2649                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2650 }
2651
2652 # convert config value to simple decimal number
2653 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2654 # to be multiplied by 1024, 1048576, or 1073741824
2655 sub config_to_int {
2656         my $val = shift;
2657
2658         # strip leading and trailing whitespace
2659         $val =~ s/^\s+//;
2660         $val =~ s/\s+$//;
2661
2662         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2663                 $unit = lc($unit);
2664                 # unknown unit is treated as 1
2665                 return $num * ($unit eq 'g' ? 1073741824 :
2666                                $unit eq 'm' ?    1048576 :
2667                                $unit eq 'k' ?       1024 : 1);
2668         }
2669         return $val;
2670 }
2671
2672 # convert config value to array reference, if needed
2673 sub config_to_multi {
2674         my $val = shift;
2675
2676         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2677 }
2678
2679 sub git_get_project_config {
2680         my ($key, $type) = @_;
2681
2682         return unless defined $git_dir;
2683
2684         # key sanity check
2685         return unless ($key);
2686         # only subsection, if exists, is case sensitive,
2687         # and not lowercased by 'git config -z -l'
2688         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2689                 $key = join(".", lc($hi), $mi, lc($lo));
2690         } else {
2691                 $key = lc($key);
2692         }
2693         $key =~ s/^gitweb\.//;
2694         return if ($key =~ m/\W/);
2695
2696         # type sanity check
2697         if (defined $type) {
2698                 $type =~ s/^--//;
2699                 $type = undef
2700                         unless ($type eq 'bool' || $type eq 'int');
2701         }
2702
2703         # get config
2704         if (!defined $config_file ||
2705             $config_file ne "$git_dir/config") {
2706                 %config = git_parse_project_config('gitweb');
2707                 $config_file = "$git_dir/config";
2708         }
2709
2710         # check if config variable (key) exists
2711         return unless exists $config{"gitweb.$key"};
2712
2713         # ensure given type
2714         if (!defined $type) {
2715                 return $config{"gitweb.$key"};
2716         } elsif ($type eq 'bool') {
2717                 # backward compatibility: 'git config --bool' returns true/false
2718                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2719         } elsif ($type eq 'int') {
2720                 return config_to_int($config{"gitweb.$key"});
2721         }
2722         return $config{"gitweb.$key"};
2723 }
2724
2725 # get hash of given path at given ref
2726 sub git_get_hash_by_path {
2727         my $base = shift;
2728         my $path = shift || return undef;
2729         my $type = shift;
2730
2731         $path =~ s,/+$,,;
2732
2733         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2734                 or die_error(500, "Open git-ls-tree failed");
2735         my $line = <$fd>;
2736         close $fd or return undef;
2737
2738         if (!defined $line) {
2739                 # there is no tree or hash given by $path at $base
2740                 return undef;
2741         }
2742
2743         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2744         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2745         if (defined $type && $type ne $2) {
2746                 # type doesn't match
2747                 return undef;
2748         }
2749         return $3;
2750 }
2751
2752 # get path of entry with given hash at given tree-ish (ref)
2753 # used to get 'from' filename for combined diff (merge commit) for renames
2754 sub git_get_path_by_hash {
2755         my $base = shift || return;
2756         my $hash = shift || return;
2757
2758         local $/ = "\0";
2759
2760         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2761                 or return undef;
2762         while (my $line = <$fd>) {
2763                 chomp $line;
2764
2765                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2766                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2767                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2768                         close $fd;
2769                         return $1;
2770                 }
2771         }
2772         close $fd;
2773         return undef;
2774 }
2775
2776 ## ......................................................................
2777 ## git utility functions, directly accessing git repository
2778
2779 # get the value of config variable either from file named as the variable
2780 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2781 # configuration variable in the repository config file.
2782 sub git_get_file_or_project_config {
2783         my ($path, $name) = @_;
2784
2785         $git_dir = "$projectroot/$path";
2786         open my $fd, '<', "$git_dir/$name"
2787                 or return git_get_project_config($name);
2788         my $conf = <$fd>;
2789         close $fd;
2790         if (defined $conf) {
2791                 chomp $conf;
2792         }
2793         return $conf;
2794 }
2795
2796 sub git_get_project_description {
2797         my $path = shift;
2798         return git_get_file_or_project_config($path, 'description');
2799 }
2800
2801 sub git_get_project_category {
2802         my $path = shift;
2803         return git_get_file_or_project_config($path, 'category');
2804 }
2805
2806
2807 # supported formats:
2808 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2809 #   - if its contents is a number, use it as tag weight,
2810 #   - otherwise add a tag with weight 1
2811 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2812 #   the same value multiple times increases tag weight
2813 # * `gitweb.ctag' multi-valued repo config variable
2814 sub git_get_project_ctags {
2815         my $project = shift;
2816         my $ctags = {};
2817
2818         $git_dir = "$projectroot/$project";
2819         if (opendir my $dh, "$git_dir/ctags") {
2820                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2821                 foreach my $tagfile (@files) {
2822                         open my $ct, '<', $tagfile
2823                                 or next;
2824                         my $val = <$ct>;
2825                         chomp $val if $val;
2826                         close $ct;
2827
2828                         (my $ctag = $tagfile) =~ s#.*/##;
2829                         if ($val =~ /^\d+$/) {
2830                                 $ctags->{$ctag} = $val;
2831                         } else {
2832                                 $ctags->{$ctag} = 1;
2833                         }
2834                 }
2835                 closedir $dh;
2836
2837         } elsif (open my $fh, '<', "$git_dir/ctags") {
2838                 while (my $line = <$fh>) {
2839                         chomp $line;
2840                         $ctags->{$line}++ if $line;
2841                 }
2842                 close $fh;
2843
2844         } else {
2845                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2846                 foreach my $tag (@$taglist) {
2847                         $ctags->{$tag}++;
2848                 }
2849         }
2850
2851         return $ctags;
2852 }
2853
2854 # return hash, where keys are content tags ('ctags'),
2855 # and values are sum of weights of given tag in every project
2856 sub git_gather_all_ctags {
2857         my $projects = shift;
2858         my $ctags = {};
2859
2860         foreach my $p (@$projects) {
2861                 foreach my $ct (keys %{$p->{'ctags'}}) {
2862                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2863                 }
2864         }
2865
2866         return $ctags;
2867 }
2868
2869 sub git_populate_project_tagcloud {
2870         my $ctags = shift;
2871
2872         # First, merge different-cased tags; tags vote on casing
2873         my %ctags_lc;
2874         foreach (keys %$ctags) {
2875                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2876                 if (not $ctags_lc{lc $_}->{topcount}
2877                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2878                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2879                         $ctags_lc{lc $_}->{topname} = $_;
2880                 }
2881         }
2882
2883         my $cloud;
2884         my $matched = $input_params{'ctag'};
2885         if (eval { require HTML::TagCloud; 1; }) {
2886                 $cloud = HTML::TagCloud->new;
2887                 foreach my $ctag (sort keys %ctags_lc) {
2888                         # Pad the title with spaces so that the cloud looks
2889                         # less crammed.
2890                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2891                         $title =~ s/ /&nbsp;/g;
2892                         $title =~ s/^/&nbsp;/g;
2893                         $title =~ s/$/&nbsp;/g;
2894                         if (defined $matched && $matched eq $ctag) {
2895                                 $title = qq(<span class="match">$title</span>);
2896                         }
2897                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2898                                     $ctags_lc{$ctag}->{count});
2899                 }
2900         } else {
2901                 $cloud = {};
2902                 foreach my $ctag (keys %ctags_lc) {
2903                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2904                         if (defined $matched && $matched eq $ctag) {
2905                                 $title = qq(<span class="match">$title</span>);
2906                         }
2907                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2908                         $cloud->{$ctag}{ctag} =
2909                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2910                 }
2911         }
2912         return $cloud;
2913 }
2914
2915 sub git_show_project_tagcloud {
2916         my ($cloud, $count) = @_;
2917         if (ref $cloud eq 'HTML::TagCloud') {
2918                 return $cloud->html_and_css($count);
2919         } else {
2920                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2921                 return
2922                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2923                         join (', ', map {
2924                                 $cloud->{$_}->{'ctag'}
2925                         } splice(@tags, 0, $count)) .
2926                         '</div>';
2927         }
2928 }
2929
2930 sub git_get_project_url_list {
2931         my $path = shift;
2932
2933         $git_dir = "$projectroot/$path";
2934         open my $fd, '<', "$git_dir/cloneurl"
2935                 or return wantarray ?
2936                 @{ config_to_multi(git_get_project_config('url')) } :
2937                    config_to_multi(git_get_project_config('url'));
2938         my @git_project_url_list = map { chomp; $_ } <$fd>;
2939         close $fd;
2940
2941         return wantarray ? @git_project_url_list : \@git_project_url_list;
2942 }
2943
2944 sub git_get_projects_list {
2945         my $filter = shift || '';
2946         my $paranoid = shift;
2947         my @list;
2948
2949         if (-d $projects_list) {
2950                 # search in directory
2951                 my $dir = $projects_list;
2952                 # remove the trailing "/"
2953                 $dir =~ s!/+$!!;
2954                 my $pfxlen = length("$dir");
2955                 my $pfxdepth = ($dir =~ tr!/!!);
2956                 # when filtering, search only given subdirectory
2957                 if ($filter && !$paranoid) {
2958                         $dir .= "/$filter";
2959                         $dir =~ s!/+$!!;
2960                 }
2961
2962                 File::Find::find({
2963                         follow_fast => 1, # follow symbolic links
2964                         follow_skip => 2, # ignore duplicates
2965                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2966                         wanted => sub {
2967                                 # global variables
2968                                 our $project_maxdepth;
2969                                 our $projectroot;
2970                                 # skip project-list toplevel, if we get it.
2971                                 return if (m!^[/.]$!);
2972                                 # only directories can be git repositories
2973                                 return unless (-d $_);
2974                                 # don't traverse too deep (Find is super slow on os x)
2975                                 # $project_maxdepth excludes depth of $projectroot
2976                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2977                                         $File::Find::prune = 1;
2978                                         return;
2979                                 }
2980
2981                                 my $path = substr($File::Find::name, $pfxlen + 1);
2982                                 # paranoidly only filter here
2983                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2984                                         next;
2985                                 }
2986                                 # we check related file in $projectroot
2987                                 if (check_export_ok("$projectroot/$path")) {
2988                                         push @list, { path => $path };
2989                                         $File::Find::prune = 1;
2990                                 }
2991                         },
2992                 }, "$dir");
2993
2994         } elsif (-f $projects_list) {
2995                 # read from file(url-encoded):
2996                 # 'git%2Fgit.git Linus+Torvalds'
2997                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2998                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2999                 open my $fd, '<', $projects_list or return;
3000         PROJECT:
3001                 while (my $line = <$fd>) {
3002                         chomp $line;
3003                         my ($path, $owner) = split ' ', $line;
3004                         $path = unescape($path);
3005                         $owner = unescape($owner);
3006                         if (!defined $path) {
3007                                 next;
3008                         }
3009                         # if $filter is rpovided, check if $path begins with $filter
3010                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3011                                 next;
3012                         }
3013                         if (check_export_ok("$projectroot/$path")) {
3014                                 my $pr = {
3015                                         path => $path,
3016                                         owner => to_utf8($owner),
3017                                 };
3018                                 push @list, $pr;
3019                         }
3020                 }
3021                 close $fd;
3022         }
3023         return @list;
3024 }
3025
3026 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3027 # as side effects it sets 'forks' field to list of forks for forked projects
3028 sub filter_forks_from_projects_list {
3029         my $projects = shift;
3030
3031         my %trie; # prefix tree of directories (path components)
3032         # generate trie out of those directories that might contain forks
3033         foreach my $pr (@$projects) {
3034                 my $path = $pr->{'path'};
3035                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3036                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3037                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3038                 next unless (-d "$projectroot/$path"); # containing directory exists
3039                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3040
3041                 # add to trie
3042                 my @dirs = split('/', $path);
3043                 # walk the trie, until either runs out of components or out of trie
3044                 my $ref = \%trie;
3045                 while (scalar @dirs &&
3046                        exists($ref->{$dirs[0]})) {
3047                         $ref = $ref->{shift @dirs};
3048                 }
3049                 # create rest of trie structure from rest of components
3050                 foreach my $dir (@dirs) {
3051                         $ref = $ref->{$dir} = {};
3052                 }
3053                 # create end marker, store $pr as a data
3054                 $ref->{''} = $pr if (!exists $ref->{''});
3055         }
3056
3057         # filter out forks, by finding shortest prefix match for paths
3058         my @filtered;
3059  PROJECT:
3060         foreach my $pr (@$projects) {
3061                 # trie lookup
3062                 my $ref = \%trie;
3063         DIR:
3064                 foreach my $dir (split('/', $pr->{'path'})) {
3065                         if (exists $ref->{''}) {
3066                                 # found [shortest] prefix, is a fork - skip it
3067                                 push @{$ref->{''}{'forks'}}, $pr;
3068                                 next PROJECT;
3069                         }
3070                         if (!exists $ref->{$dir}) {
3071                                 # not in trie, cannot have prefix, not a fork
3072                                 push @filtered, $pr;
3073                                 next PROJECT;
3074                         }
3075                         # If the dir is there, we just walk one step down the trie.
3076                         $ref = $ref->{$dir};
3077                 }
3078                 # we ran out of trie
3079                 # (shouldn't happen: it's either no match, or end marker)
3080                 push @filtered, $pr;
3081         }
3082
3083         return @filtered;
3084 }
3085
3086 # note: fill_project_list_info must be run first,
3087 # for 'descr_long' and 'ctags' to be filled
3088 sub search_projects_list {
3089         my ($projlist, %opts) = @_;
3090         my $tagfilter  = $opts{'tagfilter'};
3091         my $search_re = $opts{'search_regexp'};
3092
3093         return @$projlist
3094                 unless ($tagfilter || $search_re);
3095
3096         # searching projects require filling to be run before it;
3097         fill_project_list_info($projlist,
3098                                $tagfilter  ? 'ctags' : (),
3099                                $search_re ? ('path', 'descr') : ());
3100         my @projects;
3101  PROJECT:
3102         foreach my $pr (@$projlist) {
3103
3104                 if ($tagfilter) {
3105                         next unless ref($pr->{'ctags'}) eq 'HASH';
3106                         next unless
3107                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3108                 }
3109
3110                 if ($search_re) {
3111                         next unless
3112                                 $pr->{'path'} =~ /$search_re/ ||
3113                                 $pr->{'descr_long'} =~ /$search_re/;
3114                 }
3115
3116                 push @projects, $pr;
3117         }
3118
3119         return @projects;
3120 }
3121
3122 our $gitweb_project_owner = undef;
3123 sub git_get_project_list_from_file {
3124
3125         return if (defined $gitweb_project_owner);
3126
3127         $gitweb_project_owner = {};
3128         # read from file (url-encoded):
3129         # 'git%2Fgit.git Linus+Torvalds'
3130         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3131         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3132         if (-f $projects_list) {
3133                 open(my $fd, '<', $projects_list);
3134                 while (my $line = <$fd>) {
3135                         chomp $line;
3136                         my ($pr, $ow) = split ' ', $line;
3137                         $pr = unescape($pr);
3138                         $ow = unescape($ow);
3139                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3140                 }
3141                 close $fd;
3142         }
3143 }
3144
3145 sub git_get_project_owner {
3146         my $project = shift;
3147         my $owner;
3148
3149         return undef unless $project;
3150         $git_dir = "$projectroot/$project";
3151
3152         if (!defined $gitweb_project_owner) {
3153                 git_get_project_list_from_file();
3154         }
3155
3156         if (exists $gitweb_project_owner->{$project}) {
3157                 $owner = $gitweb_project_owner->{$project};
3158         }
3159         if (!defined $owner){
3160                 $owner = git_get_project_config('owner');
3161         }
3162         if (!defined $owner) {
3163                 $owner = get_file_owner("$git_dir");
3164         }
3165
3166         return $owner;
3167 }
3168
3169 sub git_get_last_activity {
3170         my ($path) = @_;
3171         my $fd;
3172
3173         $git_dir = "$projectroot/$path";
3174         open($fd, "-|", git_cmd(), 'for-each-ref',
3175              '--format=%(committer)',
3176              '--sort=-committerdate',
3177              '--count=1',
3178              'refs/heads') or return;
3179         my $most_recent = <$fd>;
3180         close $fd or return;
3181         if (defined $most_recent &&
3182             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3183                 my $timestamp = $1;
3184                 my $age = time - $timestamp;
3185                 return ($age, age_string($age));
3186         }
3187         return (undef, undef);
3188 }
3189
3190 # Implementation note: when a single remote is wanted, we cannot use 'git
3191 # remote show -n' because that command always work (assuming it's a remote URL
3192 # if it's not defined), and we cannot use 'git remote show' because that would
3193 # try to make a network roundtrip. So the only way to find if that particular
3194 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3195 # and when we find what we want.
3196 sub git_get_remotes_list {
3197         my $wanted = shift;
3198         my %remotes = ();
3199
3200         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3201         return unless $fd;
3202         while (my $remote = <$fd>) {
3203                 chomp $remote;
3204                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3205                 next if $wanted and not $remote eq $wanted;
3206                 my ($url, $key) = ($1, $2);
3207
3208                 $remotes{$remote} ||= { 'heads' => () };
3209                 $remotes{$remote}{$key} = $url;
3210         }
3211         close $fd or return;
3212         return wantarray ? %remotes : \%remotes;
3213 }
3214
3215 # Takes a hash of remotes as first parameter and fills it by adding the
3216 # available remote heads for each of the indicated remotes.
3217 sub fill_remote_heads {
3218         my $remotes = shift;
3219         my @heads = map { "remotes/$_" } keys %$remotes;
3220         my @remoteheads = git_get_heads_list(undef, @heads);
3221         foreach my $remote (keys %$remotes) {
3222                 $remotes->{$remote}{'heads'} = [ grep {
3223                         $_->{'name'} =~ s!^$remote/!!
3224                         } @remoteheads ];
3225         }
3226 }
3227
3228 sub git_get_references {
3229         my $type = shift || "";
3230         my %refs;
3231         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3232         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3233         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3234                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3235                 or return;
3236
3237         while (my $line = <$fd>) {
3238                 chomp $line;
3239                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3240                         if (defined $refs{$1}) {
3241                                 push @{$refs{$1}}, $2;
3242                         } else {
3243                                 $refs{$1} = [ $2 ];
3244                         }
3245                 }
3246         }
3247         close $fd or return;
3248         return \%refs;
3249 }
3250
3251 sub git_get_rev_name_tags {
3252         my $hash = shift || return undef;
3253
3254         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3255                 or return;
3256         my $name_rev = <$fd>;
3257         close $fd;
3258
3259         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3260                 return $1;
3261         } else {
3262                 # catches also '$hash undefined' output
3263                 return undef;
3264         }
3265 }
3266
3267 ## ----------------------------------------------------------------------
3268 ## parse to hash functions
3269
3270 sub parse_date {
3271         my $epoch = shift;
3272         my $tz = shift || "-0000";
3273
3274         my %date;
3275         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3276         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3277         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3278         $date{'hour'} = $hour;
3279         $date{'minute'} = $min;
3280         $date{'mday'} = $mday;
3281         $date{'day'} = $days[$wday];
3282         $date{'month'} = $months[$mon];
3283         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3284                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3285         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3286                              $mday, $months[$mon], $hour ,$min;
3287         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3288                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3289
3290         my ($tz_sign, $tz_hour, $tz_min) =
3291                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3292         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3293         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3294         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3295         $date{'hour_local'} = $hour;
3296         $date{'minute_local'} = $min;
3297         $date{'tz_local'} = $tz;
3298         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3299                                   1900+$year, $mon+1, $mday,
3300                                   $hour, $min, $sec, $tz);
3301         return %date;
3302 }
3303
3304 sub parse_tag {
3305         my $tag_id = shift;
3306         my %tag;
3307         my @comment;
3308
3309         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3310         $tag{'id'} = $tag_id;
3311         while (my $line = <$fd>) {
3312                 chomp $line;
3313                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3314                         $tag{'object'} = $1;
3315                 } elsif ($line =~ m/^type (.+)$/) {
3316                         $tag{'type'} = $1;
3317                 } elsif ($line =~ m/^tag (.+)$/) {
3318                         $tag{'name'} = $1;
3319                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3320                         $tag{'author'} = $1;
3321                         $tag{'author_epoch'} = $2;
3322                         $tag{'author_tz'} = $3;
3323                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3324                                 $tag{'author_name'}  = $1;
3325                                 $tag{'author_email'} = $2;
3326                         } else {
3327                                 $tag{'author_name'} = $tag{'author'};
3328                         }
3329                 } elsif ($line =~ m/--BEGIN/) {
3330                         push @comment, $line;
3331                         last;
3332                 } elsif ($line eq "") {
3333                         last;
3334                 }
3335         }
3336         push @comment, <$fd>;
3337         $tag{'comment'} = \@comment;
3338         close $fd or return;
3339         if (!defined $tag{'name'}) {
3340                 return
3341         };
3342         return %tag
3343 }
3344
3345 sub parse_commit_text {
3346         my ($commit_text, $withparents) = @_;
3347         my @commit_lines = split '\n', $commit_text;
3348         my %co;
3349
3350         pop @commit_lines; # Remove '\0'
3351
3352         if (! @commit_lines) {
3353                 return;
3354         }
3355
3356         my $header = shift @commit_lines;
3357         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3358                 return;
3359         }
3360         ($co{'id'}, my @parents) = split ' ', $header;
3361         while (my $line = shift @commit_lines) {
3362                 last if $line eq "\n";
3363                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3364                         $co{'tree'} = $1;
3365                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3366                         push @parents, $1;
3367                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3368                         $co{'author'} = to_utf8($1);
3369                         $co{'author_epoch'} = $2;
3370                         $co{'author_tz'} = $3;
3371                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3372                                 $co{'author_name'}  = $1;
3373                                 $co{'author_email'} = $2;
3374                         } else {
3375                                 $co{'author_name'} = $co{'author'};
3376                         }
3377                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3378                         $co{'committer'} = to_utf8($1);
3379                         $co{'committer_epoch'} = $2;
3380                         $co{'committer_tz'} = $3;
3381                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3382                                 $co{'committer_name'}  = $1;
3383                                 $co{'committer_email'} = $2;
3384                         } else {
3385                                 $co{'committer_name'} = $co{'committer'};
3386                         }
3387                 }
3388         }
3389         if (!defined $co{'tree'}) {
3390                 return;
3391         };
3392         $co{'parents'} = \@parents;
3393         $co{'parent'} = $parents[0];
3394
3395         foreach my $title (@commit_lines) {
3396                 $title =~ s/^    //;
3397                 if ($title ne "") {
3398                         $co{'title'} = chop_str($title, 80, 5);
3399                         # remove leading stuff of merges to make the interesting part visible
3400                         if (length($title) > 50) {
3401                                 $title =~ s/^Automatic //;
3402                                 $title =~ s/^merge (of|with) /Merge ... /i;
3403                                 if (length($title) > 50) {
3404                                         $title =~ s/(http|rsync):\/\///;
3405                                 }
3406                                 if (length($title) > 50) {
3407                                         $title =~ s/(master|www|rsync)\.//;
3408                                 }
3409                                 if (length($title) > 50) {
3410                                         $title =~ s/kernel.org:?//;
3411                                 }
3412                                 if (length($title) > 50) {
3413                                         $title =~ s/\/pub\/scm//;
3414                                 }
3415                         }
3416                         $co{'title_short'} = chop_str($title, 50, 5);
3417                         last;
3418                 }
3419         }
3420         if (! defined $co{'title'} || $co{'title'} eq "") {
3421                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3422         }
3423         # remove added spaces
3424         foreach my $line (@commit_lines) {
3425                 $line =~ s/^    //;
3426         }
3427         $co{'comment'} = \@commit_lines;
3428
3429         my $age = time - $co{'committer_epoch'};
3430         $co{'age'} = $age;
3431         $co{'age_string'} = age_string($age);
3432         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3433         if ($age > 60*60*24*7*2) {
3434                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3435                 $co{'age_string_age'} = $co{'age_string'};
3436         } else {
3437                 $co{'age_string_date'} = $co{'age_string'};
3438                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3439         }
3440         return %co;
3441 }
3442
3443 sub parse_commit {
3444         my ($commit_id) = @_;
3445         my %co;
3446
3447         local $/ = "\0";
3448
3449         open my $fd, "-|", git_cmd(), "rev-list",
3450                 "--parents",
3451                 "--header",
3452                 "--max-count=1",
3453                 $commit_id,
3454                 "--",
3455                 or die_error(500, "Open git-rev-list failed");
3456         %co = parse_commit_text(<$fd>, 1);
3457         close $fd;
3458
3459         return %co;
3460 }
3461
3462 sub parse_commits {
3463         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3464         my @cos;
3465
3466         $maxcount ||= 1;
3467         $skip ||= 0;
3468
3469         local $/ = "\0";
3470
3471         open my $fd, "-|", git_cmd(), "rev-list",
3472                 "--header",
3473                 @args,
3474                 ("--max-count=" . $maxcount),
3475                 ("--skip=" . $skip),
3476                 @extra_options,
3477                 $commit_id,
3478                 "--",
3479                 ($filename ? ($filename) : ())
3480                 or die_error(500, "Open git-rev-list failed");
3481         while (my $line = <$fd>) {
3482                 my %co = parse_commit_text($line);
3483                 push @cos, \%co;
3484         }
3485         close $fd;
3486
3487         return wantarray ? @cos : \@cos;
3488 }
3489
3490 # parse line of git-diff-tree "raw" output
3491 sub parse_difftree_raw_line {
3492         my $line = shift;
3493         my %res;
3494
3495         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3496         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3497         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3498                 $res{'from_mode'} = $1;
3499                 $res{'to_mode'} = $2;
3500                 $res{'from_id'} = $3;
3501                 $res{'to_id'} = $4;
3502                 $res{'status'} = $5;
3503                 $res{'similarity'} = $6;
3504                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3505                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3506                 } else {
3507                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3508                 }
3509         }
3510         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3511         # combined diff (for merge commit)
3512         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3513                 $res{'nparents'}  = length($1);
3514                 $res{'from_mode'} = [ split(' ', $2) ];
3515                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3516                 $res{'from_id'} = [ split(' ', $3) ];
3517                 $res{'to_id'} = pop @{$res{'from_id'}};
3518                 $res{'status'} = [ split('', $4) ];
3519                 $res{'to_file'} = unquote($5);
3520         }
3521         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3522         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3523                 $res{'commit'} = $1;
3524         }
3525
3526         return wantarray ? %res : \%res;
3527 }
3528
3529 # wrapper: return parsed line of git-diff-tree "raw" output
3530 # (the argument might be raw line, or parsed info)
3531 sub parsed_difftree_line {
3532         my $line_or_ref = shift;
3533
3534         if (ref($line_or_ref) eq "HASH") {
3535                 # pre-parsed (or generated by hand)
3536                 return $line_or_ref;
3537         } else {
3538                 return parse_difftree_raw_line($line_or_ref);
3539         }
3540 }
3541
3542 # parse line of git-ls-tree output
3543 sub parse_ls_tree_line {
3544         my $line = shift;
3545         my %opts = @_;
3546         my %res;
3547
3548         if ($opts{'-l'}) {
3549                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3550                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3551
3552                 $res{'mode'} = $1;
3553                 $res{'type'} = $2;
3554                 $res{'hash'} = $3;
3555                 $res{'size'} = $4;
3556                 if ($opts{'-z'}) {
3557                         $res{'name'} = $5;
3558                 } else {
3559                         $res{'name'} = unquote($5);
3560                 }
3561         } else {
3562                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3563                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3564
3565                 $res{'mode'} = $1;
3566                 $res{'type'} = $2;
3567                 $res{'hash'} = $3;
3568                 if ($opts{'-z'}) {
3569                         $res{'name'} = $4;
3570                 } else {
3571                         $res{'name'} = unquote($4);
3572                 }
3573         }
3574
3575         return wantarray ? %res : \%res;
3576 }
3577
3578 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3579 sub parse_from_to_diffinfo {
3580         my ($diffinfo, $from, $to, @parents) = @_;
3581
3582         if ($diffinfo->{'nparents'}) {
3583                 # combined diff
3584                 $from->{'file'} = [];
3585                 $from->{'href'} = [];
3586                 fill_from_file_info($diffinfo, @parents)
3587                         unless exists $diffinfo->{'from_file'};
3588                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3589                         $from->{'file'}[$i] =
3590                                 defined $diffinfo->{'from_file'}[$i] ?
3591                                         $diffinfo->{'from_file'}[$i] :
3592                                         $diffinfo->{'to_file'};
3593                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3594                                 $from->{'href'}[$i] = href(action=>"blob",
3595                                                            hash_base=>$parents[$i],
3596                                                            hash=>$diffinfo->{'from_id'}[$i],
3597                                                            file_name=>$from->{'file'}[$i]);
3598                         } else {
3599                                 $from->{'href'}[$i] = undef;
3600                         }
3601                 }
3602         } else {
3603                 # ordinary (not combined) diff
3604                 $from->{'file'} = $diffinfo->{'from_file'};
3605                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3606                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3607                                                hash=>$diffinfo->{'from_id'},
3608                                                file_name=>$from->{'file'});
3609                 } else {
3610                         delete $from->{'href'};
3611                 }
3612         }
3613
3614         $to->{'file'} = $diffinfo->{'to_file'};
3615         if (!is_deleted($diffinfo)) { # file exists in result
3616                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3617                                      hash=>$diffinfo->{'to_id'},
3618                                      file_name=>$to->{'file'});
3619         } else {
3620                 delete $to->{'href'};
3621         }
3622 }
3623
3624 ## ......................................................................
3625 ## parse to array of hashes functions
3626
3627 sub git_get_heads_list {
3628         my ($limit, @classes) = @_;
3629         @classes = ('heads') unless @classes;
3630         my @patterns = map { "refs/$_" } @classes;
3631         my @headslist;
3632
3633         open my $fd, '-|', git_cmd(), 'for-each-ref',
3634                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3635                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3636                 @patterns
3637                 or return;
3638         while (my $line = <$fd>) {
3639                 my %ref_item;
3640
3641                 chomp $line;
3642                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3643                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3644                 my ($committer, $epoch, $tz) =
3645                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3646                 $ref_item{'fullname'}  = $name;
3647                 $name =~ s!^refs/(?:head|remote)s/!!;
3648
3649                 $ref_item{'name'}  = $name;
3650                 $ref_item{'id'}    = $hash;
3651                 $ref_item{'title'} = $title || '(no commit message)';
3652                 $ref_item{'epoch'} = $epoch;
3653                 if ($epoch) {
3654                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3655                 } else {
3656                         $ref_item{'age'} = "unknown";
3657                 }
3658
3659                 push @headslist, \%ref_item;
3660         }
3661         close $fd;
3662
3663         return wantarray ? @headslist : \@headslist;
3664 }
3665
3666 sub git_get_tags_list {
3667         my $limit = shift;
3668         my @tagslist;
3669
3670         open my $fd, '-|', git_cmd(), 'for-each-ref',
3671                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3672                 '--format=%(objectname) %(objecttype) %(refname) '.
3673                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3674                 'refs/tags'
3675                 or return;
3676         while (my $line = <$fd>) {
3677                 my %ref_item;
3678
3679                 chomp $line;
3680                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3681                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3682                 my ($creator, $epoch, $tz) =
3683                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3684                 $ref_item{'fullname'} = $name;
3685                 $name =~ s!^refs/tags/!!;
3686
3687                 $ref_item{'type'} = $type;
3688                 $ref_item{'id'} = $id;
3689                 $ref_item{'name'} = $name;
3690                 if ($type eq "tag") {
3691                         $ref_item{'subject'} = $title;
3692                         $ref_item{'reftype'} = $reftype;
3693                         $ref_item{'refid'}   = $refid;
3694                 } else {
3695                         $ref_item{'reftype'} = $type;
3696                         $ref_item{'refid'}   = $id;
3697                 }
3698
3699                 if ($type eq "tag" || $type eq "commit") {
3700                         $ref_item{'epoch'} = $epoch;
3701                         if ($epoch) {
3702                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3703                         } else {
3704                                 $ref_item{'age'} = "unknown";
3705                         }
3706                 }
3707
3708                 push @tagslist, \%ref_item;
3709         }
3710         close $fd;
3711
3712         return wantarray ? @tagslist : \@tagslist;
3713 }
3714
3715 ## ----------------------------------------------------------------------
3716 ## filesystem-related functions
3717
3718 sub get_file_owner {
3719         my $path = shift;
3720
3721         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3722         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3723         if (!defined $gcos) {
3724                 return undef;
3725         }
3726         my $owner = $gcos;
3727         $owner =~ s/[,;].*$//;
3728         return to_utf8($owner);
3729 }
3730
3731 # assume that file exists
3732 sub insert_file {
3733         my $filename = shift;
3734
3735         open my $fd, '<', $filename;
3736         print map { to_utf8($_) } <$fd>;
3737         close $fd;
3738 }
3739
3740 ## ......................................................................
3741 ## mimetype related functions
3742
3743 sub mimetype_guess_file {
3744         my $filename = shift;
3745         my $mimemap = shift;
3746         -r $mimemap or return undef;
3747
3748         my %mimemap;
3749         open(my $mh, '<', $mimemap) or return undef;
3750         while (<$mh>) {
3751                 next if m/^#/; # skip comments
3752                 my ($mimetype, @exts) = split(/\s+/);
3753                 foreach my $ext (@exts) {
3754                         $mimemap{$ext} = $mimetype;
3755                 }
3756         }
3757         close($mh);
3758
3759         $filename =~ /\.([^.]*)$/;
3760         return $mimemap{$1};
3761 }
3762
3763 sub mimetype_guess {
3764         my $filename = shift;
3765         my $mime;
3766         $filename =~ /\./ or return undef;
3767
3768         if ($mimetypes_file) {
3769                 my $file = $mimetypes_file;
3770                 if ($file !~ m!^/!) { # if it is relative path
3771                         # it is relative to project
3772                         $file = "$projectroot/$project/$file";
3773                 }
3774                 $mime = mimetype_guess_file($filename, $file);
3775         }
3776         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3777         return $mime;
3778 }
3779
3780 sub blob_mimetype {
3781         my $fd = shift;
3782         my $filename = shift;
3783
3784         if ($filename) {
3785                 my $mime = mimetype_guess($filename);
3786                 $mime and return $mime;
3787         }
3788
3789         # just in case
3790         return $default_blob_plain_mimetype unless $fd;
3791
3792         if (-T $fd) {
3793                 return 'text/plain';
3794         } elsif (! $filename) {
3795                 return 'application/octet-stream';
3796         } elsif ($filename =~ m/\.png$/i) {
3797                 return 'image/png';
3798         } elsif ($filename =~ m/\.gif$/i) {
3799                 return 'image/gif';
3800         } elsif ($filename =~ m/\.jpe?g$/i) {
3801                 return 'image/jpeg';
3802         } else {
3803                 return 'application/octet-stream';
3804         }
3805 }
3806
3807 sub blob_contenttype {
3808         my ($fd, $file_name, $type) = @_;
3809
3810         $type ||= blob_mimetype($fd, $file_name);
3811         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3812                 $type .= "; charset=$default_text_plain_charset";
3813         }
3814
3815         return $type;
3816 }
3817
3818 # guess file syntax for syntax highlighting; return undef if no highlighting
3819 # the name of syntax can (in the future) depend on syntax highlighter used
3820 sub guess_file_syntax {
3821         my ($highlight, $mimetype, $file_name) = @_;
3822         return undef unless ($highlight && defined $file_name);
3823         my $basename = basename($file_name, '.in');
3824         return $highlight_basename{$basename}
3825                 if exists $highlight_basename{$basename};
3826
3827         $basename =~ /\.([^.]*)$/;
3828         my $ext = $1 or return undef;
3829         return $highlight_ext{$ext}
3830                 if exists $highlight_ext{$ext};
3831
3832         return undef;
3833 }
3834
3835 # run highlighter and return FD of its output,
3836 # or return original FD if no highlighting
3837 sub run_highlighter {
3838         my ($fd, $highlight, $syntax) = @_;
3839         return $fd unless ($highlight && defined $syntax);
3840
3841         close $fd;
3842         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3843                   quote_command($highlight_bin).
3844                   " --replace-tabs=8 --fragment --syntax $syntax |"
3845                 or die_error(500, "Couldn't open file or run syntax highlighter");
3846         return $fd;
3847 }
3848
3849 ## ======================================================================
3850 ## functions printing HTML: header, footer, error page
3851
3852 sub get_page_title {
3853         my $title = to_utf8($site_name);
3854
3855         unless (defined $project) {
3856                 if (defined $project_filter) {
3857                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3858                 }
3859                 return $title;
3860         }
3861         $title .= " - " . to_utf8($project);
3862
3863         return $title unless (defined $action);
3864         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3865
3866         return $title unless (defined $file_name);
3867         $title .= " - " . esc_path($file_name);
3868         if ($action eq "tree" && $file_name !~ m|/$|) {
3869                 $title .= "/";
3870         }
3871
3872         return $title;
3873 }
3874
3875 sub get_content_type_html {
3876         # require explicit support from the UA if we are to send the page as
3877         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3878         # we have to do this because MSIE sometimes globs '*/*', pretending to
3879         # support xhtml+xml but choking when it gets what it asked for.
3880         if (defined $cgi->http('HTTP_ACCEPT') &&
3881             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3882             $cgi->Accept('application/xhtml+xml') != 0) {
3883                 return 'application/xhtml+xml';
3884         } else {
3885                 return 'text/html';
3886         }
3887 }
3888
3889 sub print_feed_meta {
3890         if (defined $project) {
3891                 my %href_params = get_feed_info();
3892                 if (!exists $href_params{'-title'}) {
3893                         $href_params{'-title'} = 'log';
3894                 }
3895
3896                 foreach my $format (qw(RSS Atom)) {
3897                         my $type = lc($format);
3898                         my %link_attr = (
3899                                 '-rel' => 'alternate',
3900                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3901                                 '-type' => "application/$type+xml"
3902                         );
3903
3904                         $href_params{'action'} = $type;
3905                         $link_attr{'-href'} = href(%href_params);
3906                         print "<link ".
3907                               "rel=\"$link_attr{'-rel'}\" ".
3908                               "title=\"$link_attr{'-title'}\" ".
3909                               "href=\"$link_attr{'-href'}\" ".
3910                               "type=\"$link_attr{'-type'}\" ".
3911                               "/>\n";
3912
3913                         $href_params{'extra_options'} = '--no-merges';
3914                         $link_attr{'-href'} = href(%href_params);
3915                         $link_attr{'-title'} .= ' (no merges)';
3916                         print "<link ".
3917                               "rel=\"$link_attr{'-rel'}\" ".
3918                               "title=\"$link_attr{'-title'}\" ".
3919                               "href=\"$link_attr{'-href'}\" ".
3920                               "type=\"$link_attr{'-type'}\" ".
3921                               "/>\n";
3922                 }
3923
3924         } else {
3925                 printf('<link rel="alternate" title="%s projects list" '.
3926                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3927                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3928                 printf('<link rel="alternate" title="%s projects feeds" '.
3929                        'href="%s" type="text/x-opml" />'."\n",
3930                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3931         }
3932 }
3933
3934 sub print_header_links {
3935         my $status = shift;
3936
3937         # print out each stylesheet that exist, providing backwards capability
3938         # for those people who defined $stylesheet in a config file
3939         if (defined $stylesheet) {
3940                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3941         } else {
3942                 foreach my $stylesheet (@stylesheets) {
3943                         next unless $stylesheet;
3944                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3945                 }
3946         }
3947         print_feed_meta()
3948                 if ($status eq '200 OK');
3949         if (defined $favicon) {
3950                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3951         }
3952 }
3953
3954 sub print_nav_breadcrumbs_path {
3955         my $dirprefix = undef;
3956         while (my $part = shift) {
3957                 $dirprefix .= "/" if defined $dirprefix;
3958                 $dirprefix .= $part;
3959                 print $cgi->a({-href => href(project => undef,
3960                                              project_filter => $dirprefix,
3961                                              action => "project_list")},
3962                               esc_html($part)) . " / ";
3963         }
3964 }
3965
3966 sub print_nav_breadcrumbs {
3967         my %opts = @_;
3968
3969         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3970         if (defined $project) {
3971                 my @dirname = split '/', $project;
3972                 my $projectbasename = pop @dirname;
3973                 print_nav_breadcrumbs_path(@dirname);
3974                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3975                 if (defined $action) {
3976                         my $action_print = $action ;
3977                         if (defined $opts{-action_extra}) {
3978                                 $action_print = $cgi->a({-href => href(action=>$action)},
3979                                         $action);
3980                         }
3981                         print " / $action_print";
3982                 }
3983                 if (defined $opts{-action_extra}) {
3984                         print " / $opts{-action_extra}";
3985                 }
3986                 print "\n";
3987         } elsif (defined $project_filter) {
3988                 print_nav_breadcrumbs_path(split '/', $project_filter);
3989         }
3990 }
3991
3992 sub print_search_form {
3993         if (!defined $searchtext) {
3994                 $searchtext = "";
3995         }
3996         my $search_hash;
3997         if (defined $hash_base) {
3998                 $search_hash = $hash_base;
3999         } elsif (defined $hash) {
4000                 $search_hash = $hash;
4001         } else {
4002                 $search_hash = "HEAD";
4003         }
4004         my $action = $my_uri;
4005         my $use_pathinfo = gitweb_check_feature('pathinfo');
4006         if ($use_pathinfo) {
4007                 $action .= "/".esc_url($project);
4008         }
4009         print $cgi->startform(-method => "get", -action => $action) .
4010               "<div class=\"search\">\n" .
4011               (!$use_pathinfo &&
4012               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4013               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4014               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4015               $cgi->popup_menu(-name => 'st', -default => 'commit',
4016                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4017               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4018               " search:\n",
4019               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4020               "<span title=\"Extended regular expression\">" .
4021               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4022                              -checked => $search_use_regexp) .
4023               "</span>" .
4024               "</div>" .
4025               $cgi->end_form() . "\n";
4026 }
4027
4028 sub git_header_html {
4029         my $status = shift || "200 OK";
4030         my $expires = shift;
4031         my %opts = @_;
4032
4033         my $title = get_page_title();
4034         my $content_type = get_content_type_html();
4035         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4036                            -status=> $status, -expires => $expires)
4037                 unless ($opts{'-no_http_header'});
4038         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4039         print <<EOF;
4040 <?xml version="1.0" encoding="utf-8"?>
4041 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4042 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4043 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4044 <!-- git core binaries version $git_version -->
4045 <head>
4046 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4047 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4048 <meta name="robots" content="index, nofollow"/>
4049 <title>$title</title>
4050 EOF
4051         # the stylesheet, favicon etc urls won't work correctly with path_info
4052         # unless we set the appropriate base URL
4053         if ($ENV{'PATH_INFO'}) {
4054                 print "<base href=\"".esc_url($base_url)."\" />\n";
4055         }
4056         print_header_links($status);
4057
4058         if (defined $site_html_head_string) {
4059                 print to_utf8($site_html_head_string);
4060         }
4061
4062         print "</head>\n" .
4063               "<body>\n";
4064
4065         if (defined $site_header && -f $site_header) {
4066                 insert_file($site_header);
4067         }
4068
4069         print "<div class=\"page_header\">\n";
4070         if (defined $logo) {
4071                 print $cgi->a({-href => esc_url($logo_url),
4072                                -title => $logo_label},
4073                               $cgi->img({-src => esc_url($logo),
4074                                          -width => 72, -height => 27,
4075                                          -alt => "git",
4076                                          -class => "logo"}));
4077         }
4078         print_nav_breadcrumbs(%opts);
4079         print "</div>\n";
4080
4081         my $have_search = gitweb_check_feature('search');
4082         if (defined $project && $have_search) {
4083                 print_search_form();
4084         }
4085 }
4086
4087 sub git_footer_html {
4088         my $feed_class = 'rss_logo';
4089
4090         print "<div class=\"page_footer\">\n";
4091         if (defined $project) {
4092                 my $descr = git_get_project_description($project);
4093                 if (defined $descr) {
4094                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4095                 }
4096
4097                 my %href_params = get_feed_info();
4098                 if (!%href_params) {
4099                         $feed_class .= ' generic';
4100                 }
4101                 $href_params{'-title'} ||= 'log';
4102
4103                 foreach my $format (qw(RSS Atom)) {
4104                         $href_params{'action'} = lc($format);
4105                         print $cgi->a({-href => href(%href_params),
4106                                       -title => "$href_params{'-title'} $format feed",
4107                                       -class => $feed_class}, $format)."\n";
4108                 }
4109
4110         } else {
4111                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4112                                              project_filter => $project_filter),
4113                               -class => $feed_class}, "OPML") . " ";
4114                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4115                                              project_filter => $project_filter),
4116                               -class => $feed_class}, "TXT") . "\n";
4117         }
4118         print "</div>\n"; # class="page_footer"
4119
4120         if (defined $t0 && gitweb_check_feature('timed')) {
4121                 print "<div id=\"generating_info\">\n";
4122                 print 'This page took '.
4123                       '<span id="generating_time" class="time_span">'.
4124                       tv_interval($t0, [ gettimeofday() ]).
4125                       ' seconds </span>'.
4126                       ' and '.
4127                       '<span id="generating_cmd">'.
4128                       $number_of_git_cmds.
4129                       '</span> git commands '.
4130                       " to generate.\n";
4131                 print "</div>\n"; # class="page_footer"
4132         }
4133
4134         if (defined $site_footer && -f $site_footer) {
4135                 insert_file($site_footer);
4136         }
4137
4138         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4139         if (defined $action &&
4140             $action eq 'blame_incremental') {
4141                 print qq!<script type="text/javascript">\n!.
4142                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4143                       qq!           "!. href() .qq!");\n!.
4144                       qq!</script>\n!;
4145         } else {
4146                 my ($jstimezone, $tz_cookie, $datetime_class) =
4147                         gitweb_get_feature('javascript-timezone');
4148
4149                 print qq!<script type="text/javascript">\n!.
4150                       qq!window.onload = function () {\n!;
4151                 if (gitweb_check_feature('javascript-actions')) {
4152                         print qq!       fixLinks();\n!;
4153                 }
4154                 if ($jstimezone && $tz_cookie && $datetime_class) {
4155                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4156                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4157                 }
4158                 print qq!};\n!.
4159                       qq!</script>\n!;
4160         }
4161
4162         print "</body>\n" .
4163               "</html>";
4164 }
4165
4166 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4167 # Example: die_error(404, 'Hash not found')
4168 # By convention, use the following status codes (as defined in RFC 2616):
4169 # 400: Invalid or missing CGI parameters, or
4170 #      requested object exists but has wrong type.
4171 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4172 #      this server or project.
4173 # 404: Requested object/revision/project doesn't exist.
4174 # 500: The server isn't configured properly, or
4175 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4176 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4177 # 503: The server is currently unavailable (because it is overloaded,
4178 #      or down for maintenance).  Generally, this is a temporary state.
4179 sub die_error {
4180         my $status = shift || 500;
4181         my $error = esc_html(shift) || "Internal Server Error";
4182         my $extra = shift;
4183         my %opts = @_;
4184
4185         my %http_responses = (
4186                 400 => '400 Bad Request',
4187                 403 => '403 Forbidden',
4188                 404 => '404 Not Found',
4189                 500 => '500 Internal Server Error',
4190                 503 => '503 Service Unavailable',
4191         );
4192         git_header_html($http_responses{$status}, undef, %opts);
4193         print <<EOF;
4194 <div class="page_body">
4195 <br /><br />
4196 $status - $error
4197 <br />
4198 EOF
4199         if (defined $extra) {
4200                 print "<hr />\n" .
4201                       "$extra\n";
4202         }
4203         print "</div>\n";
4204
4205         git_footer_html();
4206         goto DONE_GITWEB
4207                 unless ($opts{'-error_handler'});
4208 }
4209
4210 ## ----------------------------------------------------------------------
4211 ## functions printing or outputting HTML: navigation
4212
4213 sub git_print_page_nav {
4214         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4215         $extra = '' if !defined $extra; # pager or formats
4216
4217         my @navs = qw(summary shortlog log commit commitdiff tree);
4218         if ($suppress) {
4219                 @navs = grep { $_ ne $suppress } @navs;
4220         }
4221
4222         my %arg = map { $_ => {action=>$_} } @navs;
4223         if (defined $head) {
4224                 for (qw(commit commitdiff)) {
4225                         $arg{$_}{'hash'} = $head;
4226                 }
4227                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4228                         for (qw(shortlog log)) {
4229                                 $arg{$_}{'hash'} = $head;
4230                         }
4231                 }
4232         }
4233
4234         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4235         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4236
4237         my @actions = gitweb_get_feature('actions');
4238         my %repl = (
4239                 '%' => '%',
4240                 'n' => $project,         # project name
4241                 'f' => $git_dir,         # project path within filesystem
4242                 'h' => $treehead || '',  # current hash ('h' parameter)
4243                 'b' => $treebase || '',  # hash base ('hb' parameter)
4244         );
4245         while (@actions) {
4246                 my ($label, $link, $pos) = splice(@actions,0,3);
4247                 # insert
4248                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4249                 # munch munch
4250                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4251                 $arg{$label}{'_href'} = $link;
4252         }
4253
4254         print "<div class=\"page_nav\">\n" .
4255                 (join " | ",
4256                  map { $_ eq $current ?
4257                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4258                  } @navs);
4259         print "<br/>\n$extra<br/>\n" .
4260               "</div>\n";
4261 }
4262
4263 # returns a submenu for the nagivation of the refs views (tags, heads,
4264 # remotes) with the current view disabled and the remotes view only
4265 # available if the feature is enabled
4266 sub format_ref_views {
4267         my ($current) = @_;
4268         my @ref_views = qw{tags heads};
4269         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4270         return join " | ", map {
4271                 $_ eq $current ? $_ :
4272                 $cgi->a({-href => href(action=>$_)}, $_)
4273         } @ref_views
4274 }
4275
4276 sub format_paging_nav {
4277         my ($action, $page, $has_next_link) = @_;
4278         my $paging_nav;
4279
4280
4281         if ($page > 0) {
4282                 $paging_nav .=
4283                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4284                         " &sdot; " .
4285                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4286                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4287         } else {
4288                 $paging_nav .= "first &sdot; prev";
4289         }
4290
4291         if ($has_next_link) {
4292                 $paging_nav .= " &sdot; " .
4293                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4294                                  -accesskey => "n", -title => "Alt-n"}, "next");
4295         } else {
4296                 $paging_nav .= " &sdot; next";
4297         }
4298
4299         return $paging_nav;
4300 }
4301
4302 ## ......................................................................
4303 ## functions printing or outputting HTML: div
4304
4305 sub git_print_header_div {
4306         my ($action, $title, $hash, $hash_base) = @_;
4307         my %args = ();
4308
4309         $args{'action'} = $action;
4310         $args{'hash'} = $hash if $hash;
4311         $args{'hash_base'} = $hash_base if $hash_base;
4312
4313         print "<div class=\"header\">\n" .
4314               $cgi->a({-href => href(%args), -class => "title"},
4315               $title ? $title : $action) .
4316               "\n</div>\n";
4317 }
4318
4319 sub format_repo_url {
4320         my ($name, $url) = @_;
4321         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4322 }
4323
4324 # Group output by placing it in a DIV element and adding a header.
4325 # Options for start_div() can be provided by passing a hash reference as the
4326 # first parameter to the function.
4327 # Options to git_print_header_div() can be provided by passing an array
4328 # reference. This must follow the options to start_div if they are present.
4329 # The content can be a scalar, which is output as-is, a scalar reference, which
4330 # is output after html escaping, an IO handle passed either as *handle or
4331 # *handle{IO}, or a function reference. In the latter case all following
4332 # parameters will be taken as argument to the content function call.
4333 sub git_print_section {
4334         my ($div_args, $header_args, $content);
4335         my $arg = shift;
4336         if (ref($arg) eq 'HASH') {
4337                 $div_args = $arg;
4338                 $arg = shift;
4339         }
4340         if (ref($arg) eq 'ARRAY') {
4341                 $header_args = $arg;
4342                 $arg = shift;
4343         }
4344         $content = $arg;
4345
4346         print $cgi->start_div($div_args);
4347         git_print_header_div(@$header_args);
4348
4349         if (ref($content) eq 'CODE') {
4350                 $content->(@_);
4351         } elsif (ref($content) eq 'SCALAR') {
4352                 print esc_html($$content);
4353         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4354                 print <$content>;
4355         } elsif (!ref($content) && defined($content)) {
4356                 print $content;
4357         }
4358
4359         print $cgi->end_div;
4360 }
4361
4362 sub format_timestamp_html {
4363         my $date = shift;
4364         my $strtime = $date->{'rfc2822'};
4365
4366         my (undef, undef, $datetime_class) =
4367                 gitweb_get_feature('javascript-timezone');
4368         if ($datetime_class) {
4369                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4370         }
4371
4372         my $localtime_format = '(%02d:%02d %s)';
4373         if ($date->{'hour_local'} < 6) {
4374                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4375         }
4376         $strtime .= ' ' .
4377                     sprintf($localtime_format,
4378                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4379
4380         return $strtime;
4381 }
4382
4383 # Outputs the author name and date in long form
4384 sub git_print_authorship {
4385         my $co = shift;
4386         my %opts = @_;
4387         my $tag = $opts{-tag} || 'div';
4388         my $author = $co->{'author_name'};
4389
4390         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4391         print "<$tag class=\"author_date\">" .
4392               format_search_author($author, "author", esc_html($author)) .
4393               " [".format_timestamp_html(\%ad)."]".
4394               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4395               "</$tag>\n";
4396 }
4397
4398 # Outputs table rows containing the full author or committer information,
4399 # in the format expected for 'commit' view (& similar).
4400 # Parameters are a commit hash reference, followed by the list of people
4401 # to output information for. If the list is empty it defaults to both
4402 # author and committer.
4403 sub git_print_authorship_rows {
4404         my $co = shift;
4405         # too bad we can't use @people = @_ || ('author', 'committer')
4406         my @people = @_;
4407         @people = ('author', 'committer') unless @people;
4408         foreach my $who (@people) {
4409                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4410                 print "<tr><td>$who</td><td>" .
4411                       format_search_author($co->{"${who}_name"}, $who,
4412                                            esc_html($co->{"${who}_name"})) . " " .
4413                       format_search_author($co->{"${who}_email"}, $who,
4414                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4415                       "</td><td rowspan=\"2\">" .
4416                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4417                       "</td></tr>\n" .
4418                       "<tr>" .
4419                       "<td></td><td>" .
4420                       format_timestamp_html(\%wd) .
4421                       "</td>" .
4422                       "</tr>\n";
4423         }
4424 }
4425
4426 sub git_print_page_path {
4427         my $name = shift;
4428         my $type = shift;
4429         my $hb = shift;
4430
4431
4432         print "<div class=\"page_path\">";
4433         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4434                       -title => 'tree root'}, to_utf8("[$project]"));
4435         print " / ";
4436         if (defined $name) {
4437                 my @dirname = split '/', $name;
4438                 my $basename = pop @dirname;
4439                 my $fullname = '';
4440
4441                 foreach my $dir (@dirname) {
4442                         $fullname .= ($fullname ? '/' : '') . $dir;
4443                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4444                                                      hash_base=>$hb),
4445                                       -title => $fullname}, esc_path($dir));
4446                         print " / ";
4447                 }
4448                 if (defined $type && $type eq 'blob') {
4449                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4450                                                      hash_base=>$hb),
4451                                       -title => $name}, esc_path($basename));
4452                 } elsif (defined $type && $type eq 'tree') {
4453                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4454                                                      hash_base=>$hb),
4455                                       -title => $name}, esc_path($basename));
4456                         print " / ";
4457                 } else {
4458                         print esc_path($basename);
4459                 }
4460         }
4461         print "<br/></div>\n";
4462 }
4463
4464 sub git_print_log {
4465         my $log = shift;
4466         my %opts = @_;
4467
4468         if ($opts{'-remove_title'}) {
4469                 # remove title, i.e. first line of log
4470                 shift @$log;
4471         }
4472         # remove leading empty lines
4473         while (defined $log->[0] && $log->[0] eq "") {
4474                 shift @$log;
4475         }
4476
4477         # print log
4478         my $signoff = 0;
4479         my $empty = 0;
4480         foreach my $line (@$log) {
4481                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4482                         $signoff = 1;
4483                         $empty = 0;
4484                         if (! $opts{'-remove_signoff'}) {
4485                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4486                                 next;
4487                         } else {
4488                                 # remove signoff lines
4489                                 next;
4490                         }
4491                 } else {
4492                         $signoff = 0;
4493                 }
4494
4495                 # print only one empty line
4496                 # do not print empty line after signoff
4497                 if ($line eq "") {
4498                         next if ($empty || $signoff);
4499                         $empty = 1;
4500                 } else {
4501                         $empty = 0;
4502                 }
4503
4504                 print format_log_line_html($line) . "<br/>\n";
4505         }
4506
4507         if ($opts{'-final_empty_line'}) {
4508                 # end with single empty line
4509                 print "<br/>\n" unless $empty;
4510         }
4511 }
4512
4513 # return link target (what link points to)
4514 sub git_get_link_target {
4515         my $hash = shift;
4516         my $link_target;
4517
4518         # read link
4519         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4520                 or return;
4521         {
4522                 local $/ = undef;
4523                 $link_target = <$fd>;
4524         }
4525         close $fd
4526                 or return;
4527
4528         return $link_target;
4529 }
4530
4531 # given link target, and the directory (basedir) the link is in,
4532 # return target of link relative to top directory (top tree);
4533 # return undef if it is not possible (including absolute links).
4534 sub normalize_link_target {
4535         my ($link_target, $basedir) = @_;
4536
4537         # absolute symlinks (beginning with '/') cannot be normalized
4538         return if (substr($link_target, 0, 1) eq '/');
4539
4540         # normalize link target to path from top (root) tree (dir)
4541         my $path;
4542         if ($basedir) {
4543                 $path = $basedir . '/' . $link_target;
4544         } else {
4545                 # we are in top (root) tree (dir)
4546                 $path = $link_target;
4547         }
4548
4549         # remove //, /./, and /../
4550         my @path_parts;
4551         foreach my $part (split('/', $path)) {
4552                 # discard '.' and ''
4553                 next if (!$part || $part eq '.');
4554                 # handle '..'
4555                 if ($part eq '..') {
4556                         if (@path_parts) {
4557                                 pop @path_parts;
4558                         } else {
4559                                 # link leads outside repository (outside top dir)
4560                                 return;
4561                         }
4562                 } else {
4563                         push @path_parts, $part;
4564                 }
4565         }
4566         $path = join('/', @path_parts);
4567
4568         return $path;
4569 }
4570
4571 # print tree entry (row of git_tree), but without encompassing <tr> element
4572 sub git_print_tree_entry {
4573         my ($t, $basedir, $hash_base, $have_blame) = @_;
4574
4575         my %base_key = ();
4576         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4577
4578         # The format of a table row is: mode list link.  Where mode is
4579         # the mode of the entry, list is the name of the entry, an href,
4580         # and link is the action links of the entry.
4581
4582         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4583         if (exists $t->{'size'}) {
4584                 print "<td class=\"size\">$t->{'size'}</td>\n";
4585         }
4586         if ($t->{'type'} eq "blob") {
4587                 print "<td class=\"list\">" .
4588                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4589                                                file_name=>"$basedir$t->{'name'}", %base_key),
4590                                 -class => "list"}, esc_path($t->{'name'}));
4591                 if (S_ISLNK(oct $t->{'mode'})) {
4592                         my $link_target = git_get_link_target($t->{'hash'});
4593                         if ($link_target) {
4594                                 my $norm_target = normalize_link_target($link_target, $basedir);
4595                                 if (defined $norm_target) {
4596                                         print " -> " .
4597                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4598                                                                      file_name=>$norm_target),
4599                                                        -title => $norm_target}, esc_path($link_target));
4600                                 } else {
4601                                         print " -> " . esc_path($link_target);
4602                                 }
4603                         }
4604                 }
4605                 print "</td>\n";
4606                 print "<td class=\"link\">";
4607                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4608                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4609                               "blob");
4610                 if ($have_blame) {
4611                         print " | " .
4612                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4613                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4614                                       "blame");
4615                 }
4616                 if (defined $hash_base) {
4617                         print " | " .
4618                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4619                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4620                                       "history");
4621                 }
4622                 print " | " .
4623                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4624                                                file_name=>"$basedir$t->{'name'}")},
4625                                 "raw");
4626                 print "</td>\n";
4627
4628         } elsif ($t->{'type'} eq "tree") {
4629                 print "<td class=\"list\">";
4630                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4631                                              file_name=>"$basedir$t->{'name'}",
4632                                              %base_key)},
4633                               esc_path($t->{'name'}));
4634                 print "</td>\n";
4635                 print "<td class=\"link\">";
4636                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4637                                              file_name=>"$basedir$t->{'name'}",
4638                                              %base_key)},
4639                               "tree");
4640                 if (defined $hash_base) {
4641                         print " | " .
4642                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4643                                                      file_name=>"$basedir$t->{'name'}")},
4644                                       "history");
4645                 }
4646                 print "</td>\n";
4647         } else {
4648                 # unknown object: we can only present history for it
4649                 # (this includes 'commit' object, i.e. submodule support)
4650                 print "<td class=\"list\">" .
4651                       esc_path($t->{'name'}) .
4652                       "</td>\n";
4653                 print "<td class=\"link\">";
4654                 if (defined $hash_base) {
4655                         print $cgi->a({-href => href(action=>"history",
4656                                                      hash_base=>$hash_base,
4657                                                      file_name=>"$basedir$t->{'name'}")},
4658                                       "history");
4659                 }
4660                 print "</td>\n";
4661         }
4662 }
4663
4664 ## ......................................................................
4665 ## functions printing large fragments of HTML
4666
4667 # get pre-image filenames for merge (combined) diff
4668 sub fill_from_file_info {
4669         my ($diff, @parents) = @_;
4670
4671         $diff->{'from_file'} = [ ];
4672         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4673         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4674                 if ($diff->{'status'}[$i] eq 'R' ||
4675                     $diff->{'status'}[$i] eq 'C') {
4676                         $diff->{'from_file'}[$i] =
4677                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4678                 }
4679         }
4680
4681         return $diff;
4682 }
4683
4684 # is current raw difftree line of file deletion
4685 sub is_deleted {
4686         my $diffinfo = shift;
4687
4688         return $diffinfo->{'to_id'} eq ('0' x 40);
4689 }
4690
4691 # does patch correspond to [previous] difftree raw line
4692 # $diffinfo  - hashref of parsed raw diff format
4693 # $patchinfo - hashref of parsed patch diff format
4694 #              (the same keys as in $diffinfo)
4695 sub is_patch_split {
4696         my ($diffinfo, $patchinfo) = @_;
4697
4698         return defined $diffinfo && defined $patchinfo
4699                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4700 }
4701
4702
4703 sub git_difftree_body {
4704         my ($difftree, $hash, @parents) = @_;
4705         my ($parent) = $parents[0];
4706         my $have_blame = gitweb_check_feature('blame');
4707         print "<div class=\"list_head\">\n";
4708         if ($#{$difftree} > 10) {
4709                 print(($#{$difftree} + 1) . " files changed:\n");
4710         }
4711         print "</div>\n";
4712
4713         print "<table class=\"" .
4714               (@parents > 1 ? "combined " : "") .
4715               "diff_tree\">\n";
4716
4717         # header only for combined diff in 'commitdiff' view
4718         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4719         if ($has_header) {
4720                 # table header
4721                 print "<thead><tr>\n" .
4722                        "<th></th><th></th>\n"; # filename, patchN link
4723                 for (my $i = 0; $i < @parents; $i++) {
4724                         my $par = $parents[$i];
4725                         print "<th>" .
4726                               $cgi->a({-href => href(action=>"commitdiff",
4727                                                      hash=>$hash, hash_parent=>$par),
4728                                        -title => 'commitdiff to parent number ' .
4729                                                   ($i+1) . ': ' . substr($par,0,7)},
4730                                       $i+1) .
4731                               "&nbsp;</th>\n";
4732                 }
4733                 print "</tr></thead>\n<tbody>\n";
4734         }
4735
4736         my $alternate = 1;
4737         my $patchno = 0;
4738         foreach my $line (@{$difftree}) {
4739                 my $diff = parsed_difftree_line($line);
4740
4741                 if ($alternate) {
4742                         print "<tr class=\"dark\">\n";
4743                 } else {
4744                         print "<tr class=\"light\">\n";
4745                 }
4746                 $alternate ^= 1;
4747
4748                 if (exists $diff->{'nparents'}) { # combined diff
4749
4750                         fill_from_file_info($diff, @parents)
4751                                 unless exists $diff->{'from_file'};
4752
4753                         if (!is_deleted($diff)) {
4754                                 # file exists in the result (child) commit
4755                                 print "<td>" .
4756                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4757                                                              file_name=>$diff->{'to_file'},
4758                                                              hash_base=>$hash),
4759                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4760                                       "</td>\n";
4761                         } else {
4762                                 print "<td>" .
4763                                       esc_path($diff->{'to_file'}) .
4764                                       "</td>\n";
4765                         }
4766
4767                         if ($action eq 'commitdiff') {
4768                                 # link to patch
4769                                 $patchno++;
4770                                 print "<td class=\"link\">" .
4771                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4772                                               "patch") .
4773                                       " | " .
4774                                       "</td>\n";
4775                         }
4776
4777                         my $has_history = 0;
4778                         my $not_deleted = 0;
4779                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4780                                 my $hash_parent = $parents[$i];
4781                                 my $from_hash = $diff->{'from_id'}[$i];
4782                                 my $from_path = $diff->{'from_file'}[$i];
4783                                 my $status = $diff->{'status'}[$i];
4784
4785                                 $has_history ||= ($status ne 'A');
4786                                 $not_deleted ||= ($status ne 'D');
4787
4788                                 if ($status eq 'A') {
4789                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4790                                 } elsif ($status eq 'D') {
4791                                         print "<td class=\"link\">" .
4792                                               $cgi->a({-href => href(action=>"blob",
4793                                                                      hash_base=>$hash,
4794                                                                      hash=>$from_hash,
4795                                                                      file_name=>$from_path)},
4796                                                       "blob" . ($i+1)) .
4797                                               " | </td>\n";
4798                                 } else {
4799                                         if ($diff->{'to_id'} eq $from_hash) {
4800                                                 print "<td class=\"link nochange\">";
4801                                         } else {
4802                                                 print "<td class=\"link\">";
4803                                         }
4804                                         print $cgi->a({-href => href(action=>"blobdiff",
4805                                                                      hash=>$diff->{'to_id'},
4806                                                                      hash_parent=>$from_hash,
4807                                                                      hash_base=>$hash,
4808                                                                      hash_parent_base=>$hash_parent,
4809                                                                      file_name=>$diff->{'to_file'},
4810                                                                      file_parent=>$from_path)},
4811                                                       "diff" . ($i+1)) .
4812                                               " | </td>\n";
4813                                 }
4814                         }
4815
4816                         print "<td class=\"link\">";
4817                         if ($not_deleted) {
4818                                 print $cgi->a({-href => href(action=>"blob",
4819                                                              hash=>$diff->{'to_id'},
4820                                                              file_name=>$diff->{'to_file'},
4821                                                              hash_base=>$hash)},
4822                                               "blob");
4823                                 print " | " if ($has_history);
4824                         }
4825                         if ($has_history) {
4826                                 print $cgi->a({-href => href(action=>"history",
4827                                                              file_name=>$diff->{'to_file'},
4828                                                              hash_base=>$hash)},
4829                                               "history");
4830                         }
4831                         print "</td>\n";
4832
4833                         print "</tr>\n";
4834                         next; # instead of 'else' clause, to avoid extra indent
4835                 }
4836                 # else ordinary diff
4837
4838                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4839                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4840                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4841                         $to_mode_oct = oct $diff->{'to_mode'};
4842                         if (S_ISREG($to_mode_oct)) { # only for regular file
4843                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4844                         }
4845                         $to_file_type = file_type($diff->{'to_mode'});
4846                 }
4847                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4848                         $from_mode_oct = oct $diff->{'from_mode'};
4849                         if (S_ISREG($from_mode_oct)) { # only for regular file
4850                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4851                         }
4852                         $from_file_type = file_type($diff->{'from_mode'});
4853                 }
4854
4855                 if ($diff->{'status'} eq "A") { # created
4856                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4857                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4858                         $mode_chng   .= "]</span>";
4859                         print "<td>";
4860                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4861                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4862                                       -class => "list"}, esc_path($diff->{'file'}));
4863                         print "</td>\n";
4864                         print "<td>$mode_chng</td>\n";
4865                         print "<td class=\"link\">";
4866                         if ($action eq 'commitdiff') {
4867                                 # link to patch
4868                                 $patchno++;
4869                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4870                                               "patch") .
4871                                       " | ";
4872                         }
4873                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4874                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4875                                       "blob");
4876                         print "</td>\n";
4877
4878                 } elsif ($diff->{'status'} eq "D") { # deleted
4879                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4880                         print "<td>";
4881                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4882                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4883                                        -class => "list"}, esc_path($diff->{'file'}));
4884                         print "</td>\n";
4885                         print "<td>$mode_chng</td>\n";
4886                         print "<td class=\"link\">";
4887                         if ($action eq 'commitdiff') {
4888                                 # link to patch
4889                                 $patchno++;
4890                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4891                                               "patch") .
4892                                       " | ";
4893                         }
4894                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4895                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4896                                       "blob") . " | ";
4897                         if ($have_blame) {
4898                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4899                                                              file_name=>$diff->{'file'})},
4900                                               "blame") . " | ";
4901                         }
4902                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4903                                                      file_name=>$diff->{'file'})},
4904                                       "history");
4905                         print "</td>\n";
4906
4907                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4908                         my $mode_chnge = "";
4909                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4910                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4911                                 if ($from_file_type ne $to_file_type) {
4912                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4913                                 }
4914                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4915                                         if ($from_mode_str && $to_mode_str) {
4916                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4917                                         } elsif ($to_mode_str) {
4918                                                 $mode_chnge .= " mode: $to_mode_str";
4919                                         }
4920                                 }
4921                                 $mode_chnge .= "]</span>\n";
4922                         }
4923                         print "<td>";
4924                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4925                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4926                                       -class => "list"}, esc_path($diff->{'file'}));
4927                         print "</td>\n";
4928                         print "<td>$mode_chnge</td>\n";
4929                         print "<td class=\"link\">";
4930                         if ($action eq 'commitdiff') {
4931                                 # link to patch
4932                                 $patchno++;
4933                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4934                                               "patch") .
4935                                       " | ";
4936                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4937                                 # "commit" view and modified file (not onlu mode changed)
4938                                 print $cgi->a({-href => href(action=>"blobdiff",
4939                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4940                                                              hash_base=>$hash, hash_parent_base=>$parent,
4941                                                              file_name=>$diff->{'file'})},
4942                                               "diff") .
4943                                       " | ";
4944                         }
4945                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4946                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4947                                        "blob") . " | ";
4948                         if ($have_blame) {
4949                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4950                                                              file_name=>$diff->{'file'})},
4951                                               "blame") . " | ";
4952                         }
4953                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4954                                                      file_name=>$diff->{'file'})},
4955                                       "history");
4956                         print "</td>\n";
4957
4958                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4959                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4960                         my $nstatus = $status_name{$diff->{'status'}};
4961                         my $mode_chng = "";
4962                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4963                                 # mode also for directories, so we cannot use $to_mode_str
4964                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4965                         }
4966                         print "<td>" .
4967                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4968                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4969                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4970                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4971                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4972                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4973                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4974                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4975                               "<td class=\"link\">";
4976                         if ($action eq 'commitdiff') {
4977                                 # link to patch
4978                                 $patchno++;
4979                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4980                                               "patch") .
4981                                       " | ";
4982                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4983                                 # "commit" view and modified file (not only pure rename or copy)
4984                                 print $cgi->a({-href => href(action=>"blobdiff",
4985                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4986                                                              hash_base=>$hash, hash_parent_base=>$parent,
4987                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4988                                               "diff") .
4989                                       " | ";
4990                         }
4991                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4992                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4993                                       "blob") . " | ";
4994                         if ($have_blame) {
4995                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4996                                                              file_name=>$diff->{'to_file'})},
4997                                               "blame") . " | ";
4998                         }
4999                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5000                                                     file_name=>$diff->{'to_file'})},
5001                                       "history");
5002                         print "</td>\n";
5003
5004                 } # we should not encounter Unmerged (U) or Unknown (X) status
5005                 print "</tr>\n";
5006         }
5007         print "</tbody>" if $has_header;
5008         print "</table>\n";
5009 }
5010
5011 # Print context lines and then rem/add lines in a side-by-side manner.
5012 sub print_sidebyside_diff_lines {
5013         my ($ctx, $rem, $add) = @_;
5014
5015         # print context block before add/rem block
5016         if (@$ctx) {
5017                 print join '',
5018                         '<div class="chunk_block ctx">',
5019                                 '<div class="old">',
5020                                 @$ctx,
5021                                 '</div>',
5022                                 '<div class="new">',
5023                                 @$ctx,
5024                                 '</div>',
5025                         '</div>';
5026         }
5027
5028         if (!@$add) {
5029                 # pure removal
5030                 print join '',
5031                         '<div class="chunk_block rem">',
5032                                 '<div class="old">',
5033                                 @$rem,
5034                                 '</div>',
5035                         '</div>';
5036         } elsif (!@$rem) {
5037                 # pure addition
5038                 print join '',
5039                         '<div class="chunk_block add">',
5040                                 '<div class="new">',
5041                                 @$add,
5042                                 '</div>',
5043                         '</div>';
5044         } else {
5045                 print join '',
5046                         '<div class="chunk_block chg">',
5047                                 '<div class="old">',
5048                                 @$rem,
5049                                 '</div>',
5050                                 '<div class="new">',
5051                                 @$add,
5052                                 '</div>',
5053                         '</div>';
5054         }
5055 }
5056
5057 # Print context lines and then rem/add lines in inline manner.
5058 sub print_inline_diff_lines {
5059         my ($ctx, $rem, $add) = @_;
5060
5061         print @$ctx, @$rem, @$add;
5062 }
5063
5064 # Format removed and added line, mark changed part and HTML-format them.
5065 # Implementation is based on contrib/diff-highlight
5066 sub format_rem_add_lines_pair {
5067         my ($rem, $add, $num_parents) = @_;
5068
5069         # We need to untabify lines before split()'ing them;
5070         # otherwise offsets would be invalid.
5071         chomp $rem;
5072         chomp $add;
5073         $rem = untabify($rem);
5074         $add = untabify($add);
5075
5076         my @rem = split(//, $rem);
5077         my @add = split(//, $add);
5078         my ($esc_rem, $esc_add);
5079         # Ignore leading +/- characters for each parent.
5080         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5081         my ($prefix_has_nonspace, $suffix_has_nonspace);
5082
5083         my $shorter = (@rem < @add) ? @rem : @add;
5084         while ($prefix_len < $shorter) {
5085                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5086
5087                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5088                 $prefix_len++;
5089         }
5090
5091         while ($prefix_len + $suffix_len < $shorter) {
5092                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5093
5094                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5095                 $suffix_len++;
5096         }
5097
5098         # Mark lines that are different from each other, but have some common
5099         # part that isn't whitespace.  If lines are completely different, don't
5100         # mark them because that would make output unreadable, especially if
5101         # diff consists of multiple lines.
5102         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5103                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5104                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5105                 $esc_add = esc_html_hl_regions($add, 'marked',
5106                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5107         } else {
5108                 $esc_rem = esc_html($rem, -nbsp=>1);
5109                 $esc_add = esc_html($add, -nbsp=>1);
5110         }
5111
5112         return format_diff_line(\$esc_rem, 'rem'),
5113                format_diff_line(\$esc_add, 'add');
5114 }
5115
5116 # HTML-format diff context, removed and added lines.
5117 sub format_ctx_rem_add_lines {
5118         my ($ctx, $rem, $add, $num_parents) = @_;
5119         my (@new_ctx, @new_rem, @new_add);
5120         my $can_highlight = 0;
5121         my $is_combined = ($num_parents > 1);
5122
5123         # Highlight if every removed line has a corresponding added line.
5124         if (@$add > 0 && @$add == @$rem) {
5125                 $can_highlight = 1;
5126
5127                 # Highlight lines in combined diff only if the chunk contains
5128                 # diff between the same version, e.g.
5129                 #
5130                 #    - a
5131                 #   -  b
5132                 #    + c
5133                 #   +  d
5134                 #
5135                 # Otherwise the highlightling would be confusing.
5136                 if ($is_combined) {
5137                         for (my $i = 0; $i < @$add; $i++) {
5138                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5139                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5140
5141                                 $prefix_rem =~ s/-/+/g;
5142
5143                                 if ($prefix_rem ne $prefix_add) {
5144                                         $can_highlight = 0;
5145                                         last;
5146                                 }
5147                         }
5148                 }
5149         }
5150
5151         if ($can_highlight) {
5152                 for (my $i = 0; $i < @$add; $i++) {
5153                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5154                                 $rem->[$i], $add->[$i], $num_parents);
5155                         push @new_rem, $line_rem;
5156                         push @new_add, $line_add;
5157                 }
5158         } else {
5159                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5160                 @new_add = map { format_diff_line($_, 'add') } @$add;
5161         }
5162
5163         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5164
5165         return (\@new_ctx, \@new_rem, \@new_add);
5166 }
5167
5168 # Print context lines and then rem/add lines.
5169 sub print_diff_lines {
5170         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5171         my $is_combined = $num_parents > 1;
5172
5173         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5174                 $num_parents);
5175
5176         if ($diff_style eq 'sidebyside' && !$is_combined) {
5177                 print_sidebyside_diff_lines($ctx, $rem, $add);
5178         } else {
5179                 # default 'inline' style and unknown styles
5180                 print_inline_diff_lines($ctx, $rem, $add);
5181         }
5182 }
5183
5184 sub print_diff_chunk {
5185         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5186         my (@ctx, @rem, @add);
5187
5188         # The class of the previous line.
5189         my $prev_class = '';
5190
5191         return unless @chunk;
5192
5193         # incomplete last line might be among removed or added lines,
5194         # or both, or among context lines: find which
5195         for (my $i = 1; $i < @chunk; $i++) {
5196                 if ($chunk[$i][0] eq 'incomplete') {
5197                         $chunk[$i][0] = $chunk[$i-1][0];
5198                 }
5199         }
5200
5201         # guardian
5202         push @chunk, ["", ""];
5203
5204         foreach my $line_info (@chunk) {
5205                 my ($class, $line) = @$line_info;
5206
5207                 # print chunk headers
5208                 if ($class && $class eq 'chunk_header') {
5209                         print format_diff_line($line, $class, $from, $to);
5210                         next;
5211                 }
5212
5213                 ## print from accumulator when have some add/rem lines or end
5214                 # of chunk (flush context lines), or when have add and rem
5215                 # lines and new block is reached (otherwise add/rem lines could
5216                 # be reordered)
5217                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5218                     (@rem && @add && $class ne $prev_class)) {
5219                         print_diff_lines(\@ctx, \@rem, \@add,
5220                                          $diff_style, $num_parents);
5221                         @ctx = @rem = @add = ();
5222                 }
5223
5224                 ## adding lines to accumulator
5225                 # guardian value
5226                 last unless $line;
5227                 # rem, add or change
5228                 if ($class eq 'rem') {
5229                         push @rem, $line;
5230                 } elsif ($class eq 'add') {
5231                         push @add, $line;
5232                 }
5233                 # context line
5234                 if ($class eq 'ctx') {
5235                         push @ctx, $line;
5236                 }
5237
5238                 $prev_class = $class;
5239         }
5240 }
5241
5242 sub git_patchset_body {
5243         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5244         my ($hash_parent) = $hash_parents[0];
5245
5246         my $is_combined = (@hash_parents > 1);
5247         my $patch_idx = 0;
5248         my $patch_number = 0;
5249         my $patch_line;
5250         my $diffinfo;
5251         my $to_name;
5252         my (%from, %to);
5253         my @chunk; # for side-by-side diff
5254
5255         print "<div class=\"patchset\">\n";
5256
5257         # skip to first patch
5258         while ($patch_line = <$fd>) {
5259                 chomp $patch_line;
5260
5261                 last if ($patch_line =~ m/^diff /);
5262         }
5263
5264  PATCH:
5265         while ($patch_line) {
5266
5267                 # parse "git diff" header line
5268                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5269                         # $1 is from_name, which we do not use
5270                         $to_name = unquote($2);
5271                         $to_name =~ s!^b/!!;
5272                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5273                         # $1 is 'cc' or 'combined', which we do not use
5274                         $to_name = unquote($2);
5275                 } else {
5276                         $to_name = undef;
5277                 }
5278
5279                 # check if current patch belong to current raw line
5280                 # and parse raw git-diff line if needed
5281                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5282                         # this is continuation of a split patch
5283                         print "<div class=\"patch cont\">\n";
5284                 } else {
5285                         # advance raw git-diff output if needed
5286                         $patch_idx++ if defined $diffinfo;
5287
5288                         # read and prepare patch information
5289                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5290
5291                         # compact combined diff output can have some patches skipped
5292                         # find which patch (using pathname of result) we are at now;
5293                         if ($is_combined) {
5294                                 while ($to_name ne $diffinfo->{'to_file'}) {
5295                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5296                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5297                                               "</div>\n";  # class="patch"
5298
5299                                         $patch_idx++;
5300                                         $patch_number++;
5301
5302                                         last if $patch_idx > $#$difftree;
5303                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5304                                 }
5305                         }
5306
5307                         # modifies %from, %to hashes
5308                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5309
5310                         # this is first patch for raw difftree line with $patch_idx index
5311                         # we index @$difftree array from 0, but number patches from 1
5312                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5313                 }
5314
5315                 # git diff header
5316                 #assert($patch_line =~ m/^diff /) if DEBUG;
5317                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5318                 $patch_number++;
5319                 # print "git diff" header
5320                 print format_git_diff_header_line($patch_line, $diffinfo,
5321                                                   \%from, \%to);
5322
5323                 # print extended diff header
5324                 print "<div class=\"diff extended_header\">\n";
5325         EXTENDED_HEADER:
5326                 while ($patch_line = <$fd>) {
5327                         chomp $patch_line;
5328
5329                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5330
5331                         print format_extended_diff_header_line($patch_line, $diffinfo,
5332                                                                \%from, \%to);
5333                 }
5334                 print "</div>\n"; # class="diff extended_header"
5335
5336                 # from-file/to-file diff header
5337                 if (! $patch_line) {
5338                         print "</div>\n"; # class="patch"
5339                         last PATCH;
5340                 }
5341                 next PATCH if ($patch_line =~ m/^diff /);
5342                 #assert($patch_line =~ m/^---/) if DEBUG;
5343
5344                 my $last_patch_line = $patch_line;
5345                 $patch_line = <$fd>;
5346                 chomp $patch_line;
5347                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5348
5349                 print format_diff_from_to_header($last_patch_line, $patch_line,
5350                                                  $diffinfo, \%from, \%to,
5351                                                  @hash_parents);
5352
5353                 # the patch itself
5354         LINE:
5355                 while ($patch_line = <$fd>) {
5356                         chomp $patch_line;
5357
5358                         next PATCH if ($patch_line =~ m/^diff /);
5359
5360                         my $class = diff_line_class($patch_line, \%from, \%to);
5361
5362                         if ($class eq 'chunk_header') {
5363                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5364                                 @chunk = ();
5365                         }
5366
5367                         push @chunk, [ $class, $patch_line ];
5368                 }
5369
5370         } continue {
5371                 if (@chunk) {
5372                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5373                         @chunk = ();
5374                 }
5375                 print "</div>\n"; # class="patch"
5376         }
5377
5378         # for compact combined (--cc) format, with chunk and patch simplification
5379         # the patchset might be empty, but there might be unprocessed raw lines
5380         for (++$patch_idx if $patch_number > 0;
5381              $patch_idx < @$difftree;
5382              ++$patch_idx) {
5383                 # read and prepare patch information
5384                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5385
5386                 # generate anchor for "patch" links in difftree / whatchanged part
5387                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5388                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5389                       "</div>\n";  # class="patch"
5390
5391                 $patch_number++;
5392         }
5393
5394         if ($patch_number == 0) {
5395                 if (@hash_parents > 1) {
5396                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5397                 } else {
5398                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5399                 }
5400         }
5401
5402         print "</div>\n"; # class="patchset"
5403 }
5404
5405 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5406
5407 sub git_project_search_form {
5408         my ($searchtext, $search_use_regexp) = @_;
5409
5410         my $limit = '';
5411         if ($project_filter) {
5412                 $limit = " in '$project_filter/'";
5413         }
5414
5415         print "<div class=\"projsearch\">\n";
5416         print $cgi->startform(-method => 'get', -action => $my_uri) .
5417               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5418         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5419                 if (defined $project_filter);
5420         print $cgi->textfield(-name => 's', -value => $searchtext,
5421                               -title => "Search project by name and description$limit",
5422                               -size => 60) . "\n" .
5423               "<span title=\"Extended regular expression\">" .
5424               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5425                              -checked => $search_use_regexp) .
5426               "</span>\n" .
5427               $cgi->submit(-name => 'btnS', -value => 'Search') .
5428               $cgi->end_form() . "\n" .
5429               $cgi->a({-href => href(project => undef, searchtext => undef,
5430                                      project_filter => $project_filter)},
5431                       esc_html("List all projects$limit")) . "<br />\n";
5432         print "</div>\n";
5433 }
5434
5435 # entry for given @keys needs filling if at least one of keys in list
5436 # is not present in %$project_info
5437 sub project_info_needs_filling {
5438         my ($project_info, @keys) = @_;
5439
5440         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5441         foreach my $key (@keys) {
5442                 if (!exists $project_info->{$key}) {
5443                         return 1;
5444                 }
5445         }
5446         return;
5447 }
5448
5449 # fills project list info (age, description, owner, category, forks, etc.)
5450 # for each project in the list, removing invalid projects from
5451 # returned list, or fill only specified info.
5452 #
5453 # Invalid projects are removed from the returned list if and only if you
5454 # ask 'age' or 'age_string' to be filled, because they are the only fields
5455 # that run unconditionally git command that requires repository, and
5456 # therefore do always check if project repository is invalid.
5457 #
5458 # USAGE:
5459 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5460 #   ensures that 'descr_long' and 'ctags' fields are filled
5461 # * @project_list = fill_project_list_info(\@project_list)
5462 #   ensures that all fields are filled (and invalid projects removed)
5463 #
5464 # NOTE: modifies $projlist, but does not remove entries from it
5465 sub fill_project_list_info {
5466         my ($projlist, @wanted_keys) = @_;
5467         my @projects;
5468         my $filter_set = sub { return @_; };
5469         if (@wanted_keys) {
5470                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5471                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5472         }
5473
5474         my $show_ctags = gitweb_check_feature('ctags');
5475  PROJECT:
5476         foreach my $pr (@$projlist) {
5477                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5478                         my (@activity) = git_get_last_activity($pr->{'path'});
5479                         unless (@activity) {
5480                                 next PROJECT;
5481                         }
5482                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5483                 }
5484                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5485                         my $descr = git_get_project_description($pr->{'path'}) || "";
5486                         $descr = to_utf8($descr);
5487                         $pr->{'descr_long'} = $descr;
5488                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5489                 }
5490                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5491                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5492                 }
5493                 if ($show_ctags &&
5494                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5495                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5496                 }
5497                 if ($projects_list_group_categories &&
5498                     project_info_needs_filling($pr, $filter_set->('category'))) {
5499                         my $cat = git_get_project_category($pr->{'path'}) ||
5500                                                            $project_list_default_category;
5501                         $pr->{'category'} = to_utf8($cat);
5502                 }
5503
5504                 push @projects, $pr;
5505         }
5506
5507         return @projects;
5508 }
5509
5510 sub sort_projects_list {
5511         my ($projlist, $order) = @_;
5512         my @projects;
5513
5514         my %order_info = (
5515                 project => { key => 'path', type => 'str' },
5516                 descr => { key => 'descr_long', type => 'str' },
5517                 owner => { key => 'owner', type => 'str' },
5518                 age => { key => 'age', type => 'num' }
5519         );
5520         my $oi = $order_info{$order};
5521         return @$projlist unless defined $oi;
5522         if ($oi->{'type'} eq 'str') {
5523                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5524         } else {
5525                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5526         }
5527
5528         return @projects;
5529 }
5530
5531 # returns a hash of categories, containing the list of project
5532 # belonging to each category
5533 sub build_projlist_by_category {
5534         my ($projlist, $from, $to) = @_;
5535         my %categories;
5536
5537         $from = 0 unless defined $from;
5538         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5539
5540         for (my $i = $from; $i <= $to; $i++) {
5541                 my $pr = $projlist->[$i];
5542                 push @{$categories{ $pr->{'category'} }}, $pr;
5543         }
5544
5545         return wantarray ? %categories : \%categories;
5546 }
5547
5548 # print 'sort by' <th> element, generating 'sort by $name' replay link
5549 # if that order is not selected
5550 sub print_sort_th {
5551         print format_sort_th(@_);
5552 }
5553
5554 sub format_sort_th {
5555         my ($name, $order, $header) = @_;
5556         my $sort_th = "";
5557         $header ||= ucfirst($name);
5558
5559         if ($order eq $name) {
5560                 $sort_th .= "<th>$header</th>\n";
5561         } else {
5562                 $sort_th .= "<th>" .
5563                             $cgi->a({-href => href(-replay=>1, order=>$name),
5564                                      -class => "header"}, $header) .
5565                             "</th>\n";
5566         }
5567
5568         return $sort_th;
5569 }
5570
5571 sub git_project_list_rows {
5572         my ($projlist, $from, $to, $check_forks) = @_;
5573
5574         $from = 0 unless defined $from;
5575         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5576
5577         my $alternate = 1;
5578         for (my $i = $from; $i <= $to; $i++) {
5579                 my $pr = $projlist->[$i];
5580
5581                 if ($alternate) {
5582                         print "<tr class=\"dark\">\n";
5583                 } else {
5584                         print "<tr class=\"light\">\n";
5585                 }
5586                 $alternate ^= 1;
5587
5588                 if ($check_forks) {
5589                         print "<td>";
5590                         if ($pr->{'forks'}) {
5591                                 my $nforks = scalar @{$pr->{'forks'}};
5592                                 if ($nforks > 0) {
5593                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5594                                                        -title => "$nforks forks"}, "+");
5595                                 } else {
5596                                         print $cgi->span({-title => "$nforks forks"}, "+");
5597                                 }
5598                         }
5599                         print "</td>\n";
5600                 }
5601                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5602                                         -class => "list"},
5603                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5604                       "</td>\n" .
5605                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5606                                         -class => "list",
5607                                         -title => $pr->{'descr_long'}},
5608                                         $search_regexp
5609                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5610                                                                     $pr->{'descr'}, $search_regexp)
5611                                         : esc_html($pr->{'descr'})) .
5612                       "</td>\n" .
5613                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5614                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5615                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5616                       "<td class=\"link\">" .
5617                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5618                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5619                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5620                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5621                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5622                       "</td>\n" .
5623                       "</tr>\n";
5624         }
5625 }
5626
5627 sub git_project_list_body {
5628         # actually uses global variable $project
5629         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5630         my @projects = @$projlist;
5631
5632         my $check_forks = gitweb_check_feature('forks');
5633         my $show_ctags  = gitweb_check_feature('ctags');
5634         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5635         $check_forks = undef
5636                 if ($tagfilter || $search_regexp);
5637
5638         # filtering out forks before filling info allows to do less work
5639         @projects = filter_forks_from_projects_list(\@projects)
5640                 if ($check_forks);
5641         # search_projects_list pre-fills required info
5642         @projects = search_projects_list(\@projects,
5643                                          'search_regexp' => $search_regexp,
5644                                          'tagfilter'  => $tagfilter)
5645                 if ($tagfilter || $search_regexp);
5646         # fill the rest
5647         @projects = fill_project_list_info(\@projects);
5648
5649         $order ||= $default_projects_order;
5650         $from = 0 unless defined $from;
5651         $to = $#projects if (!defined $to || $#projects < $to);
5652
5653         # short circuit
5654         if ($from > $to) {
5655                 print "<center>\n".
5656                       "<b>No such projects found</b><br />\n".
5657                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5658                       "</center>\n<br />\n";
5659                 return;
5660         }
5661
5662         @projects = sort_projects_list(\@projects, $order);
5663
5664         if ($show_ctags) {
5665                 my $ctags = git_gather_all_ctags(\@projects);
5666                 my $cloud = git_populate_project_tagcloud($ctags);
5667                 print git_show_project_tagcloud($cloud, 64);
5668         }
5669
5670         print "<table class=\"project_list\">\n";
5671         unless ($no_header) {
5672                 print "<tr>\n";
5673                 if ($check_forks) {
5674                         print "<th></th>\n";
5675                 }
5676                 print_sort_th('project', $order, 'Project');
5677                 print_sort_th('descr', $order, 'Description');
5678                 print_sort_th('owner', $order, 'Owner');
5679                 print_sort_th('age', $order, 'Last Change');
5680                 print "<th></th>\n" . # for links
5681                       "</tr>\n";
5682         }
5683
5684         if ($projects_list_group_categories) {
5685                 # only display categories with projects in the $from-$to window
5686                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5687                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5688                 foreach my $cat (sort keys %categories) {
5689                         unless ($cat eq "") {
5690                                 print "<tr>\n";
5691                                 if ($check_forks) {
5692                                         print "<td></td>\n";
5693                                 }
5694                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5695                                 print "</tr>\n";
5696                         }
5697
5698                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5699                 }
5700         } else {
5701                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5702         }
5703
5704         if (defined $extra) {
5705                 print "<tr>\n";
5706                 if ($check_forks) {
5707                         print "<td></td>\n";
5708                 }
5709                 print "<td colspan=\"5\">$extra</td>\n" .
5710                       "</tr>\n";
5711         }
5712         print "</table>\n";
5713 }
5714
5715 sub git_log_body {
5716         # uses global variable $project
5717         my ($commitlist, $from, $to, $refs, $extra) = @_;
5718
5719         $from = 0 unless defined $from;
5720         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5721
5722         for (my $i = 0; $i <= $to; $i++) {
5723                 my %co = %{$commitlist->[$i]};
5724                 next if !%co;
5725                 my $commit = $co{'id'};
5726                 my $ref = format_ref_marker($refs, $commit);
5727                 git_print_header_div('commit',
5728                                "<span class=\"age\">$co{'age_string'}</span>" .
5729                                esc_html($co{'title'}) . $ref,
5730                                $commit);
5731                 print "<div class=\"title_text\">\n" .
5732                       "<div class=\"log_link\">\n" .
5733                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5734                       " | " .
5735                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5736                       " | " .
5737                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5738                       "<br/>\n" .
5739                       "</div>\n";
5740                       git_print_authorship(\%co, -tag => 'span');
5741                       print "<br/>\n</div>\n";
5742
5743                 print "<div class=\"log_body\">\n";
5744                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5745                 print "</div>\n";
5746         }
5747         if ($extra) {
5748                 print "<div class=\"page_nav\">\n";
5749                 print "$extra\n";
5750                 print "</div>\n";
5751         }
5752 }
5753
5754 sub git_shortlog_body {
5755         # uses global variable $project
5756         my ($commitlist, $from, $to, $refs, $extra) = @_;
5757
5758         $from = 0 unless defined $from;
5759         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5760
5761         print "<table class=\"shortlog\">\n";
5762         my $alternate = 1;
5763         for (my $i = $from; $i <= $to; $i++) {
5764                 my %co = %{$commitlist->[$i]};
5765                 my $commit = $co{'id'};
5766                 my $ref = format_ref_marker($refs, $commit);
5767                 if ($alternate) {
5768                         print "<tr class=\"dark\">\n";
5769                 } else {
5770                         print "<tr class=\"light\">\n";
5771                 }
5772                 $alternate ^= 1;
5773                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5774                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5775                       format_author_html('td', \%co, 10) . "<td>";
5776                 print format_subject_html($co{'title'}, $co{'title_short'},
5777                                           href(action=>"commit", hash=>$commit), $ref);
5778                 print "</td>\n" .
5779                       "<td class=\"link\">" .
5780                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5781                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5782                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5783                 my $snapshot_links = format_snapshot_links($commit);
5784                 if (defined $snapshot_links) {
5785                         print " | " . $snapshot_links;
5786                 }
5787                 print "</td>\n" .
5788                       "</tr>\n";
5789         }
5790         if (defined $extra) {
5791                 print "<tr>\n" .
5792                       "<td colspan=\"4\">$extra</td>\n" .
5793                       "</tr>\n";
5794         }
5795         print "</table>\n";
5796 }
5797
5798 sub git_history_body {
5799         # Warning: assumes constant type (blob or tree) during history
5800         my ($commitlist, $from, $to, $refs, $extra,
5801             $file_name, $file_hash, $ftype) = @_;
5802
5803         $from = 0 unless defined $from;
5804         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5805
5806         print "<table class=\"history\">\n";
5807         my $alternate = 1;
5808         for (my $i = $from; $i <= $to; $i++) {
5809                 my %co = %{$commitlist->[$i]};
5810                 if (!%co) {
5811                         next;
5812                 }
5813                 my $commit = $co{'id'};
5814
5815                 my $ref = format_ref_marker($refs, $commit);
5816
5817                 if ($alternate) {
5818                         print "<tr class=\"dark\">\n";
5819                 } else {
5820                         print "<tr class=\"light\">\n";
5821                 }
5822                 $alternate ^= 1;
5823                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5824         # shortlog:   format_author_html('td', \%co, 10)
5825                       format_author_html('td', \%co, 15, 3) . "<td>";
5826                 # originally git_history used chop_str($co{'title'}, 50)
5827                 print format_subject_html($co{'title'}, $co{'title_short'},
5828                                           href(action=>"commit", hash=>$commit), $ref);
5829                 print "</td>\n" .
5830                       "<td class=\"link\">" .
5831                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5832                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5833
5834                 if ($ftype eq 'blob') {
5835                         my $blob_current = $file_hash;
5836                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5837                         if (defined $blob_current && defined $blob_parent &&
5838                                         $blob_current ne $blob_parent) {
5839                                 print " | " .
5840                                         $cgi->a({-href => href(action=>"blobdiff",
5841                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5842                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5843                                                                file_name=>$file_name)},
5844                                                 "diff to current");
5845                         }
5846                 }
5847                 print "</td>\n" .
5848                       "</tr>\n";
5849         }
5850         if (defined $extra) {
5851                 print "<tr>\n" .
5852                       "<td colspan=\"4\">$extra</td>\n" .
5853                       "</tr>\n";
5854         }
5855         print "</table>\n";
5856 }
5857
5858 sub git_tags_body {
5859         # uses global variable $project
5860         my ($taglist, $from, $to, $extra) = @_;
5861         $from = 0 unless defined $from;
5862         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5863
5864         print "<table class=\"tags\">\n";
5865         my $alternate = 1;
5866         for (my $i = $from; $i <= $to; $i++) {
5867                 my $entry = $taglist->[$i];
5868                 my %tag = %$entry;
5869                 my $comment = $tag{'subject'};
5870                 my $comment_short;
5871                 if (defined $comment) {
5872                         $comment_short = chop_str($comment, 30, 5);
5873                 }
5874                 if ($alternate) {
5875                         print "<tr class=\"dark\">\n";
5876                 } else {
5877                         print "<tr class=\"light\">\n";
5878                 }
5879                 $alternate ^= 1;
5880                 if (defined $tag{'age'}) {
5881                         print "<td><i>$tag{'age'}</i></td>\n";
5882                 } else {
5883                         print "<td></td>\n";
5884                 }
5885                 print "<td>" .
5886                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5887                                -class => "list name"}, esc_html($tag{'name'})) .
5888                       "</td>\n" .
5889                       "<td>";
5890                 if (defined $comment) {
5891                         print format_subject_html($comment, $comment_short,
5892                                                   href(action=>"tag", hash=>$tag{'id'}));
5893                 }
5894                 print "</td>\n" .
5895                       "<td class=\"selflink\">";
5896                 if ($tag{'type'} eq "tag") {
5897                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5898                 } else {
5899                         print "&nbsp;";
5900                 }
5901                 print "</td>\n" .
5902                       "<td class=\"link\">" . " | " .
5903                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5904                 if ($tag{'reftype'} eq "commit") {
5905                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5906                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5907                 } elsif ($tag{'reftype'} eq "blob") {
5908                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5909                 }
5910                 print "</td>\n" .
5911                       "</tr>";
5912         }
5913         if (defined $extra) {
5914                 print "<tr>\n" .
5915                       "<td colspan=\"5\">$extra</td>\n" .
5916                       "</tr>\n";
5917         }
5918         print "</table>\n";
5919 }
5920
5921 sub git_heads_body {
5922         # uses global variable $project
5923         my ($headlist, $head_at, $from, $to, $extra) = @_;
5924         $from = 0 unless defined $from;
5925         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5926
5927         print "<table class=\"heads\">\n";
5928         my $alternate = 1;
5929         for (my $i = $from; $i <= $to; $i++) {
5930                 my $entry = $headlist->[$i];
5931                 my %ref = %$entry;
5932                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5933                 if ($alternate) {
5934                         print "<tr class=\"dark\">\n";
5935                 } else {
5936                         print "<tr class=\"light\">\n";
5937                 }
5938                 $alternate ^= 1;
5939                 print "<td><i>$ref{'age'}</i></td>\n" .
5940                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5941                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5942                                -class => "list name"},esc_html($ref{'name'})) .
5943                       "</td>\n" .
5944                       "<td class=\"link\">" .
5945                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5946                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5947                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5948                       "</td>\n" .
5949                       "</tr>";
5950         }
5951         if (defined $extra) {
5952                 print "<tr>\n" .
5953                       "<td colspan=\"3\">$extra</td>\n" .
5954                       "</tr>\n";
5955         }
5956         print "</table>\n";
5957 }
5958
5959 # Display a single remote block
5960 sub git_remote_block {
5961         my ($remote, $rdata, $limit, $head) = @_;
5962
5963         my $heads = $rdata->{'heads'};
5964         my $fetch = $rdata->{'fetch'};
5965         my $push = $rdata->{'push'};
5966
5967         my $urls_table = "<table class=\"projects_list\">\n" ;
5968
5969         if (defined $fetch) {
5970                 if ($fetch eq $push) {
5971                         $urls_table .= format_repo_url("URL", $fetch);
5972                 } else {
5973                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5974                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5975                 }
5976         } elsif (defined $push) {
5977                 $urls_table .= format_repo_url("Push URL", $push);
5978         } else {
5979                 $urls_table .= format_repo_url("", "No remote URL");
5980         }
5981
5982         $urls_table .= "</table>\n";
5983
5984         my $dots;
5985         if (defined $limit && $limit < @$heads) {
5986                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5987         }
5988
5989         print $urls_table;
5990         git_heads_body($heads, $head, 0, $limit, $dots);
5991 }
5992
5993 # Display a list of remote names with the respective fetch and push URLs
5994 sub git_remotes_list {
5995         my ($remotedata, $limit) = @_;
5996         print "<table class=\"heads\">\n";
5997         my $alternate = 1;
5998         my @remotes = sort keys %$remotedata;
5999
6000         my $limited = $limit && $limit < @remotes;
6001
6002         $#remotes = $limit - 1 if $limited;
6003
6004         while (my $remote = shift @remotes) {
6005                 my $rdata = $remotedata->{$remote};
6006                 my $fetch = $rdata->{'fetch'};
6007                 my $push = $rdata->{'push'};
6008                 if ($alternate) {
6009                         print "<tr class=\"dark\">\n";
6010                 } else {
6011                         print "<tr class=\"light\">\n";
6012                 }
6013                 $alternate ^= 1;
6014                 print "<td>" .
6015                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6016                                -class=> "list name"},esc_html($remote)) .
6017                       "</td>";
6018                 print "<td class=\"link\">" .
6019                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6020                       " | " .
6021                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6022                       "</td>";
6023
6024                 print "</tr>\n";
6025         }
6026
6027         if ($limited) {
6028                 print "<tr>\n" .
6029                       "<td colspan=\"3\">" .
6030                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6031                       "</td>\n" . "</tr>\n";
6032         }
6033
6034         print "</table>";
6035 }
6036
6037 # Display remote heads grouped by remote, unless there are too many
6038 # remotes, in which case we only display the remote names
6039 sub git_remotes_body {
6040         my ($remotedata, $limit, $head) = @_;
6041         if ($limit and $limit < keys %$remotedata) {
6042                 git_remotes_list($remotedata, $limit);
6043         } else {
6044                 fill_remote_heads($remotedata);
6045                 while (my ($remote, $rdata) = each %$remotedata) {
6046                         git_print_section({-class=>"remote", -id=>$remote},
6047                                 ["remotes", $remote, $remote], sub {
6048                                         git_remote_block($remote, $rdata, $limit, $head);
6049                                 });
6050                 }
6051         }
6052 }
6053
6054 sub git_search_message {
6055         my %co = @_;
6056
6057         my $greptype;
6058         if ($searchtype eq 'commit') {
6059                 $greptype = "--grep=";
6060         } elsif ($searchtype eq 'author') {
6061                 $greptype = "--author=";
6062         } elsif ($searchtype eq 'committer') {
6063                 $greptype = "--committer=";
6064         }
6065         $greptype .= $searchtext;
6066         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6067                                        $greptype, '--regexp-ignore-case',
6068                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6069
6070         my $paging_nav = '';
6071         if ($page > 0) {
6072                 $paging_nav .=
6073                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6074                                 "first") .
6075                         " &sdot; " .
6076                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6077                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6078         } else {
6079                 $paging_nav .= "first &sdot; prev";
6080         }
6081         my $next_link = '';
6082         if ($#commitlist >= 100) {
6083                 $next_link =
6084                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6085                                  -accesskey => "n", -title => "Alt-n"}, "next");
6086                 $paging_nav .= " &sdot; $next_link";
6087         } else {
6088                 $paging_nav .= " &sdot; next";
6089         }
6090
6091         git_header_html();
6092
6093         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6094         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6095         if ($page == 0 && !@commitlist) {
6096                 print "<p>No match.</p>\n";
6097         } else {
6098                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6099         }
6100
6101         git_footer_html();
6102 }
6103
6104 sub git_search_changes {
6105         my %co = @_;
6106
6107         local $/ = "\n";
6108         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6109                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6110                 ($search_use_regexp ? '--pickaxe-regex' : ())
6111                         or die_error(500, "Open git-log failed");
6112
6113         git_header_html();
6114
6115         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6116         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6117
6118         print "<table class=\"pickaxe search\">\n";
6119         my $alternate = 1;
6120         undef %co;
6121         my @files;
6122         while (my $line = <$fd>) {
6123                 chomp $line;
6124                 next unless $line;
6125
6126                 my %set = parse_difftree_raw_line($line);
6127                 if (defined $set{'commit'}) {
6128                         # finish previous commit
6129                         if (%co) {
6130                                 print "</td>\n" .
6131                                       "<td class=\"link\">" .
6132                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6133                                               "commit") .
6134                                       " | " .
6135                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6136                                                              hash_base=>$co{'id'})},
6137                                               "tree") .
6138                                       "</td>\n" .
6139                                       "</tr>\n";
6140                         }
6141
6142                         if ($alternate) {
6143                                 print "<tr class=\"dark\">\n";
6144                         } else {
6145                                 print "<tr class=\"light\">\n";
6146                         }
6147                         $alternate ^= 1;
6148                         %co = parse_commit($set{'commit'});
6149                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6150                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6151                               "<td><i>$author</i></td>\n" .
6152                               "<td>" .
6153                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6154                                       -class => "list subject"},
6155                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6156                 } elsif (defined $set{'to_id'}) {
6157                         next if ($set{'to_id'} =~ m/^0{40}$/);
6158
6159                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6160                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6161                                       -class => "list"},
6162                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6163                               "<br/>\n";
6164                 }
6165         }
6166         close $fd;
6167
6168         # finish last commit (warning: repetition!)
6169         if (%co) {
6170                 print "</td>\n" .
6171                       "<td class=\"link\">" .
6172                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6173                               "commit") .
6174                       " | " .
6175                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6176                                              hash_base=>$co{'id'})},
6177                               "tree") .
6178                       "</td>\n" .
6179                       "</tr>\n";
6180         }
6181
6182         print "</table>\n";
6183
6184         git_footer_html();
6185 }
6186
6187 sub git_search_files {
6188         my %co = @_;
6189
6190         local $/ = "\n";
6191         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6192                 $search_use_regexp ? ('-E', '-i') : '-F',
6193                 $searchtext, $co{'tree'}
6194                         or die_error(500, "Open git-grep failed");
6195
6196         git_header_html();
6197
6198         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6199         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6200
6201         print "<table class=\"grep_search\">\n";
6202         my $alternate = 1;
6203         my $matches = 0;
6204         my $lastfile = '';
6205         my $file_href;
6206         while (my $line = <$fd>) {
6207                 chomp $line;
6208                 my ($file, $lno, $ltext, $binary);
6209                 last if ($matches++ > 1000);
6210                 if ($line =~ /^Binary file (.+) matches$/) {
6211                         $file = $1;
6212                         $binary = 1;
6213                 } else {
6214                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6215                         $file =~ s/^$co{'tree'}://;
6216                 }
6217                 if ($file ne $lastfile) {
6218                         $lastfile and print "</td></tr>\n";
6219                         if ($alternate++) {
6220                                 print "<tr class=\"dark\">\n";
6221                         } else {
6222                                 print "<tr class=\"light\">\n";
6223                         }
6224                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6225                                           file_name=>$file);
6226                         print "<td class=\"list\">".
6227                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6228                         print "</td><td>\n";
6229                         $lastfile = $file;
6230                 }
6231                 if ($binary) {
6232                         print "<div class=\"binary\">Binary file</div>\n";
6233                 } else {
6234                         $ltext = untabify($ltext);
6235                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6236                                 $ltext = esc_html($1, -nbsp=>1);
6237                                 $ltext .= '<span class="match">';
6238                                 $ltext .= esc_html($2, -nbsp=>1);
6239                                 $ltext .= '</span>';
6240                                 $ltext .= esc_html($3, -nbsp=>1);
6241                         } else {
6242                                 $ltext = esc_html($ltext, -nbsp=>1);
6243                         }
6244                         print "<div class=\"pre\">" .
6245                                 $cgi->a({-href => $file_href.'#l'.$lno,
6246                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6247                                 ' ' .  $ltext . "</div>\n";
6248                 }
6249         }
6250         if ($lastfile) {
6251                 print "</td></tr>\n";
6252                 if ($matches > 1000) {
6253                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6254                 }
6255         } else {
6256                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6257         }
6258         close $fd;
6259
6260         print "</table>\n";
6261
6262         git_footer_html();
6263 }
6264
6265 sub git_search_grep_body {
6266         my ($commitlist, $from, $to, $extra) = @_;
6267         $from = 0 unless defined $from;
6268         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6269
6270         print "<table class=\"commit_search\">\n";
6271         my $alternate = 1;
6272         for (my $i = $from; $i <= $to; $i++) {
6273                 my %co = %{$commitlist->[$i]};
6274                 if (!%co) {
6275                         next;
6276                 }
6277                 my $commit = $co{'id'};
6278                 if ($alternate) {
6279                         print "<tr class=\"dark\">\n";
6280                 } else {
6281                         print "<tr class=\"light\">\n";
6282                 }
6283                 $alternate ^= 1;
6284                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6285                       format_author_html('td', \%co, 15, 5) .
6286                       "<td>" .
6287                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6288                                -class => "list subject"},
6289                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6290                 my $comment = $co{'comment'};
6291                 foreach my $line (@$comment) {
6292                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6293                                 my ($lead, $match, $trail) = ($1, $2, $3);
6294                                 $match = chop_str($match, 70, 5, 'center');
6295                                 my $contextlen = int((80 - length($match))/2);
6296                                 $contextlen = 30 if ($contextlen > 30);
6297                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6298                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6299
6300                                 $lead  = esc_html($lead);
6301                                 $match = esc_html($match);
6302                                 $trail = esc_html($trail);
6303
6304                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6305                         }
6306                 }
6307                 print "</td>\n" .
6308                       "<td class=\"link\">" .
6309                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6310                       " | " .
6311                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6312                       " | " .
6313                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6314                 print "</td>\n" .
6315                       "</tr>\n";
6316         }
6317         if (defined $extra) {
6318                 print "<tr>\n" .
6319                       "<td colspan=\"3\">$extra</td>\n" .
6320                       "</tr>\n";
6321         }
6322         print "</table>\n";
6323 }
6324
6325 ## ======================================================================
6326 ## ======================================================================
6327 ## actions
6328
6329 sub git_project_list {
6330         my $order = $input_params{'order'};
6331         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6332                 die_error(400, "Unknown order parameter");
6333         }
6334
6335         my @list = git_get_projects_list($project_filter, $strict_export);
6336         if (!@list) {
6337                 die_error(404, "No projects found");
6338         }
6339
6340         git_header_html();
6341         if (defined $home_text && -f $home_text) {
6342                 print "<div class=\"index_include\">\n";
6343                 insert_file($home_text);
6344                 print "</div>\n";
6345         }
6346
6347         git_project_search_form($searchtext, $search_use_regexp);
6348         git_project_list_body(\@list, $order);
6349         git_footer_html();
6350 }
6351
6352 sub git_forks {
6353         my $order = $input_params{'order'};
6354         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6355                 die_error(400, "Unknown order parameter");
6356         }
6357
6358         my $filter = $project;
6359         $filter =~ s/\.git$//;
6360         my @list = git_get_projects_list($filter);
6361         if (!@list) {
6362                 die_error(404, "No forks found");
6363         }
6364
6365         git_header_html();
6366         git_print_page_nav('','');
6367         git_print_header_div('summary', "$project forks");
6368         git_project_list_body(\@list, $order);
6369         git_footer_html();
6370 }
6371
6372 sub git_project_index {
6373         my @projects = git_get_projects_list($project_filter, $strict_export);
6374         if (!@projects) {
6375                 die_error(404, "No projects found");
6376         }
6377
6378         print $cgi->header(
6379                 -type => 'text/plain',
6380                 -charset => 'utf-8',
6381                 -content_disposition => 'inline; filename="index.aux"');
6382
6383         foreach my $pr (@projects) {
6384                 if (!exists $pr->{'owner'}) {
6385                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6386                 }
6387
6388                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6389                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6390                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6391                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6392                 $path  =~ s/ /\+/g;
6393                 $owner =~ s/ /\+/g;
6394
6395                 print "$path $owner\n";
6396         }
6397 }
6398
6399 sub git_summary {
6400         my $descr = git_get_project_description($project) || "none";
6401         my %co = parse_commit("HEAD");
6402         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6403         my $head = $co{'id'};
6404         my $remote_heads = gitweb_check_feature('remote_heads');
6405
6406         my $owner = git_get_project_owner($project);
6407
6408         my $refs = git_get_references();
6409         # These get_*_list functions return one more to allow us to see if
6410         # there are more ...
6411         my @taglist  = git_get_tags_list(16);
6412         my @headlist = git_get_heads_list(16);
6413         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6414         my @forklist;
6415         my $check_forks = gitweb_check_feature('forks');
6416
6417         if ($check_forks) {
6418                 # find forks of a project
6419                 my $filter = $project;
6420                 $filter =~ s/\.git$//;
6421                 @forklist = git_get_projects_list($filter);
6422                 # filter out forks of forks
6423                 @forklist = filter_forks_from_projects_list(\@forklist)
6424                         if (@forklist);
6425         }
6426
6427         git_header_html();
6428         git_print_page_nav('summary','', $head);
6429
6430         print "<div class=\"title\">&nbsp;</div>\n";
6431         print "<table class=\"projects_list\">\n" .
6432               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6433               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6434         if (defined $cd{'rfc2822'}) {
6435                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6436                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6437         }
6438
6439         # use per project git URL list in $projectroot/$project/cloneurl
6440         # or make project git URL from git base URL and project name
6441         my $url_tag = "URL";
6442         my @url_list = git_get_project_url_list($project);
6443         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6444         foreach my $git_url (@url_list) {
6445                 next unless $git_url;
6446                 print format_repo_url($url_tag, $git_url);
6447                 $url_tag = "";
6448         }
6449
6450         # Tag cloud
6451         my $show_ctags = gitweb_check_feature('ctags');
6452         if ($show_ctags) {
6453                 my $ctags = git_get_project_ctags($project);
6454                 if (%$ctags) {
6455                         # without ability to add tags, don't show if there are none
6456                         my $cloud = git_populate_project_tagcloud($ctags);
6457                         print "<tr id=\"metadata_ctags\">" .
6458                               "<td>content tags</td>" .
6459                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6460                               "</tr>\n";
6461                 }
6462         }
6463
6464         print "</table>\n";
6465
6466         # If XSS prevention is on, we don't include README.html.
6467         # TODO: Allow a readme in some safe format.
6468         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6469                 print "<div class=\"title\">readme</div>\n" .
6470                       "<div class=\"readme\">\n";
6471                 insert_file("$projectroot/$project/README.html");
6472                 print "\n</div>\n"; # class="readme"
6473         }
6474
6475         # we need to request one more than 16 (0..15) to check if
6476         # those 16 are all
6477         my @commitlist = $head ? parse_commits($head, 17) : ();
6478         if (@commitlist) {
6479                 git_print_header_div('shortlog');
6480                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6481                                   $#commitlist <=  15 ? undef :
6482                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6483         }
6484
6485         if (@taglist) {
6486                 git_print_header_div('tags');
6487                 git_tags_body(\@taglist, 0, 15,
6488                               $#taglist <=  15 ? undef :
6489                               $cgi->a({-href => href(action=>"tags")}, "..."));
6490         }
6491
6492         if (@headlist) {
6493                 git_print_header_div('heads');
6494                 git_heads_body(\@headlist, $head, 0, 15,
6495                                $#headlist <= 15 ? undef :
6496                                $cgi->a({-href => href(action=>"heads")}, "..."));
6497         }
6498
6499         if (%remotedata) {
6500                 git_print_header_div('remotes');
6501                 git_remotes_body(\%remotedata, 15, $head);
6502         }
6503
6504         if (@forklist) {
6505                 git_print_header_div('forks');
6506                 git_project_list_body(\@forklist, 'age', 0, 15,
6507                                       $#forklist <= 15 ? undef :
6508                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6509                                       'no_header');
6510         }
6511
6512         git_footer_html();
6513 }
6514
6515 sub git_tag {
6516         my %tag = parse_tag($hash);
6517
6518         if (! %tag) {
6519                 die_error(404, "Unknown tag object");
6520         }
6521
6522         my $head = git_get_head_hash($project);
6523         git_header_html();
6524         git_print_page_nav('','', $head,undef,$head);
6525         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6526         print "<div class=\"title_text\">\n" .
6527               "<table class=\"object_header\">\n" .
6528               "<tr>\n" .
6529               "<td>object</td>\n" .
6530               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6531                                $tag{'object'}) . "</td>\n" .
6532               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6533                                               $tag{'type'}) . "</td>\n" .
6534               "</tr>\n";
6535         if (defined($tag{'author'})) {
6536                 git_print_authorship_rows(\%tag, 'author');
6537         }
6538         print "</table>\n\n" .
6539               "</div>\n";
6540         print "<div class=\"page_body\">";
6541         my $comment = $tag{'comment'};
6542         foreach my $line (@$comment) {
6543                 chomp $line;
6544                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6545         }
6546         print "</div>\n";
6547         git_footer_html();
6548 }
6549
6550 sub git_blame_common {
6551         my $format = shift || 'porcelain';
6552         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6553                 $format = 'incremental';
6554                 $action = 'blame_incremental'; # for page title etc
6555         }
6556
6557         # permissions
6558         gitweb_check_feature('blame')
6559                 or die_error(403, "Blame view not allowed");
6560
6561         # error checking
6562         die_error(400, "No file name given") unless $file_name;
6563         $hash_base ||= git_get_head_hash($project);
6564         die_error(404, "Couldn't find base commit") unless $hash_base;
6565         my %co = parse_commit($hash_base)
6566                 or die_error(404, "Commit not found");
6567         my $ftype = "blob";
6568         if (!defined $hash) {
6569                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6570                         or die_error(404, "Error looking up file");
6571         } else {
6572                 $ftype = git_get_type($hash);
6573                 if ($ftype !~ "blob") {
6574                         die_error(400, "Object is not a blob");
6575                 }
6576         }
6577
6578         my $fd;
6579         if ($format eq 'incremental') {
6580                 # get file contents (as base)
6581                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6582                         or die_error(500, "Open git-cat-file failed");
6583         } elsif ($format eq 'data') {
6584                 # run git-blame --incremental
6585                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6586                         $hash_base, "--", $file_name
6587                         or die_error(500, "Open git-blame --incremental failed");
6588         } else {
6589                 # run git-blame --porcelain
6590                 open $fd, "-|", git_cmd(), "blame", '-p',
6591                         $hash_base, '--', $file_name
6592                         or die_error(500, "Open git-blame --porcelain failed");
6593         }
6594
6595         # incremental blame data returns early
6596         if ($format eq 'data') {
6597                 print $cgi->header(
6598                         -type=>"text/plain", -charset => "utf-8",
6599                         -status=> "200 OK");
6600                 local $| = 1; # output autoflush
6601                 while (my $line = <$fd>) {
6602                         print to_utf8($line);
6603                 }
6604                 close $fd
6605                         or print "ERROR $!\n";
6606
6607                 print 'END';
6608                 if (defined $t0 && gitweb_check_feature('timed')) {
6609                         print ' '.
6610                               tv_interval($t0, [ gettimeofday() ]).
6611                               ' '.$number_of_git_cmds;
6612                 }
6613                 print "\n";
6614
6615                 return;
6616         }
6617
6618         # page header
6619         git_header_html();
6620         my $formats_nav =
6621                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6622                         "blob") .
6623                 " | ";
6624         if ($format eq 'incremental') {
6625                 $formats_nav .=
6626                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6627                                 "blame") . " (non-incremental)";
6628         } else {
6629                 $formats_nav .=
6630                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6631                                 "blame") . " (incremental)";
6632         }
6633         $formats_nav .=
6634                 " | " .
6635                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6636                         "history") .
6637                 " | " .
6638                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6639                         "HEAD");
6640         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6641         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6642         git_print_page_path($file_name, $ftype, $hash_base);
6643
6644         # page body
6645         if ($format eq 'incremental') {
6646                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6647                       "This page requires JavaScript to run.\n Use ".
6648                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6649                               'this page').
6650                       " instead.\n".
6651                       "</b></center></div>\n</noscript>\n";
6652
6653                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6654         }
6655
6656         print qq!<div class="page_body">\n!;
6657         print qq!<div id="progress_info">... / ...</div>\n!
6658                 if ($format eq 'incremental');
6659         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6660               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6661               qq!<thead>\n!.
6662               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6663               qq!</thead>\n!.
6664               qq!<tbody>\n!;
6665
6666         my @rev_color = qw(light dark);
6667         my $num_colors = scalar(@rev_color);
6668         my $current_color = 0;
6669
6670         if ($format eq 'incremental') {
6671                 my $color_class = $rev_color[$current_color];
6672
6673                 #contents of a file
6674                 my $linenr = 0;
6675         LINE:
6676                 while (my $line = <$fd>) {
6677                         chomp $line;
6678                         $linenr++;
6679
6680                         print qq!<tr id="l$linenr" class="$color_class">!.
6681                               qq!<td class="sha1"><a href=""> </a></td>!.
6682                               qq!<td class="linenr">!.
6683                               qq!<a class="linenr" href="">$linenr</a></td>!;
6684                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6685                         print qq!</tr>\n!;
6686                 }
6687
6688         } else { # porcelain, i.e. ordinary blame
6689                 my %metainfo = (); # saves information about commits
6690
6691                 # blame data
6692         LINE:
6693                 while (my $line = <$fd>) {
6694                         chomp $line;
6695                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6696                         # no <lines in group> for subsequent lines in group of lines
6697                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6698                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6699                         if (!exists $metainfo{$full_rev}) {
6700                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6701                         }
6702                         my $meta = $metainfo{$full_rev};
6703                         my $data;
6704                         while ($data = <$fd>) {
6705                                 chomp $data;
6706                                 last if ($data =~ s/^\t//); # contents of line
6707                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6708                                         $meta->{$1} = $2 unless exists $meta->{$1};
6709                                 }
6710                                 if ($data =~ /^previous /) {
6711                                         $meta->{'nprevious'}++;
6712                                 }
6713                         }
6714                         my $short_rev = substr($full_rev, 0, 8);
6715                         my $author = $meta->{'author'};
6716                         my %date =
6717                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6718                         my $date = $date{'iso-tz'};
6719                         if ($group_size) {
6720                                 $current_color = ($current_color + 1) % $num_colors;
6721                         }
6722                         my $tr_class = $rev_color[$current_color];
6723                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6724                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6725                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6726                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6727                         if ($group_size) {
6728                                 print "<td class=\"sha1\"";
6729                                 print " title=\"". esc_html($author) . ", $date\"";
6730                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6731                                 print ">";
6732                                 print $cgi->a({-href => href(action=>"commit",
6733                                                              hash=>$full_rev,
6734                                                              file_name=>$file_name)},
6735                                               esc_html($short_rev));
6736                                 if ($group_size >= 2) {
6737                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6738                                         if (@author_initials) {
6739                                                 print "<br />" .
6740                                                       esc_html(join('', @author_initials));
6741                                                 #           or join('.', ...)
6742                                         }
6743                                 }
6744                                 print "</td>\n";
6745                         }
6746                         # 'previous' <sha1 of parent commit> <filename at commit>
6747                         if (exists $meta->{'previous'} &&
6748                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6749                                 $meta->{'parent'} = $1;
6750                                 $meta->{'file_parent'} = unquote($2);
6751                         }
6752                         my $linenr_commit =
6753                                 exists($meta->{'parent'}) ?
6754                                 $meta->{'parent'} : $full_rev;
6755                         my $linenr_filename =
6756                                 exists($meta->{'file_parent'}) ?
6757                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6758                         my $blamed = href(action => 'blame',
6759                                           file_name => $linenr_filename,
6760                                           hash_base => $linenr_commit);
6761                         print "<td class=\"linenr\">";
6762                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6763                                         -class => "linenr" },
6764                                       esc_html($lineno));
6765                         print "</td>";
6766                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6767                         print "</tr>\n";
6768                 } # end while
6769
6770         }
6771
6772         # footer
6773         print "</tbody>\n".
6774               "</table>\n"; # class="blame"
6775         print "</div>\n";   # class="blame_body"
6776         close $fd
6777                 or print "Reading blob failed\n";
6778
6779         git_footer_html();
6780 }
6781
6782 sub git_blame {
6783         git_blame_common();
6784 }
6785
6786 sub git_blame_incremental {
6787         git_blame_common('incremental');
6788 }
6789
6790 sub git_blame_data {
6791         git_blame_common('data');
6792 }
6793
6794 sub git_tags {
6795         my $head = git_get_head_hash($project);
6796         git_header_html();
6797         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6798         git_print_header_div('summary', $project);
6799
6800         my @tagslist = git_get_tags_list();
6801         if (@tagslist) {
6802                 git_tags_body(\@tagslist);
6803         }
6804         git_footer_html();
6805 }
6806
6807 sub git_heads {
6808         my $head = git_get_head_hash($project);
6809         git_header_html();
6810         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6811         git_print_header_div('summary', $project);
6812
6813         my @headslist = git_get_heads_list();
6814         if (@headslist) {
6815                 git_heads_body(\@headslist, $head);
6816         }
6817         git_footer_html();
6818 }
6819
6820 # used both for single remote view and for list of all the remotes
6821 sub git_remotes {
6822         gitweb_check_feature('remote_heads')
6823                 or die_error(403, "Remote heads view is disabled");
6824
6825         my $head = git_get_head_hash($project);
6826         my $remote = $input_params{'hash'};
6827
6828         my $remotedata = git_get_remotes_list($remote);
6829         die_error(500, "Unable to get remote information") unless defined $remotedata;
6830
6831         unless (%$remotedata) {
6832                 die_error(404, defined $remote ?
6833                         "Remote $remote not found" :
6834                         "No remotes found");
6835         }
6836
6837         git_header_html(undef, undef, -action_extra => $remote);
6838         git_print_page_nav('', '',  $head, undef, $head,
6839                 format_ref_views($remote ? '' : 'remotes'));
6840
6841         fill_remote_heads($remotedata);
6842         if (defined $remote) {
6843                 git_print_header_div('remotes', "$remote remote for $project");
6844                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6845         } else {
6846                 git_print_header_div('summary', "$project remotes");
6847                 git_remotes_body($remotedata, undef, $head);
6848         }
6849
6850         git_footer_html();
6851 }
6852
6853 sub git_blob_plain {
6854         my $type = shift;
6855         my $expires;
6856
6857         if (!defined $hash) {
6858                 if (defined $file_name) {
6859                         my $base = $hash_base || git_get_head_hash($project);
6860                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6861                                 or die_error(404, "Cannot find file");
6862                 } else {
6863                         die_error(400, "No file name defined");
6864                 }
6865         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6866                 # blobs defined by non-textual hash id's can be cached
6867                 $expires = "+1d";
6868         }
6869
6870         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6871                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6872
6873         # content-type (can include charset)
6874         $type = blob_contenttype($fd, $file_name, $type);
6875
6876         # "save as" filename, even when no $file_name is given
6877         my $save_as = "$hash";
6878         if (defined $file_name) {
6879                 $save_as = $file_name;
6880         } elsif ($type =~ m/^text\//) {
6881                 $save_as .= '.txt';
6882         }
6883
6884         # With XSS prevention on, blobs of all types except a few known safe
6885         # ones are served with "Content-Disposition: attachment" to make sure
6886         # they don't run in our security domain.  For certain image types,
6887         # blob view writes an <img> tag referring to blob_plain view, and we
6888         # want to be sure not to break that by serving the image as an
6889         # attachment (though Firefox 3 doesn't seem to care).
6890         my $sandbox = $prevent_xss &&
6891                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6892
6893         # serve text/* as text/plain
6894         if ($prevent_xss &&
6895             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6896              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6897                 my $rest = $1;
6898                 $rest = defined $rest ? $rest : '';
6899                 $type = "text/plain$rest";
6900         }
6901
6902         print $cgi->header(
6903                 -type => $type,
6904                 -expires => $expires,
6905                 -content_disposition =>
6906                         ($sandbox ? 'attachment' : 'inline')
6907                         . '; filename="' . $save_as . '"');
6908         local $/ = undef;
6909         binmode STDOUT, ':raw';
6910         print <$fd>;
6911         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6912         close $fd;
6913 }
6914
6915 sub git_blob {
6916         my $expires;
6917
6918         if (!defined $hash) {
6919                 if (defined $file_name) {
6920                         my $base = $hash_base || git_get_head_hash($project);
6921                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6922                                 or die_error(404, "Cannot find file");
6923                 } else {
6924                         die_error(400, "No file name defined");
6925                 }
6926         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6927                 # blobs defined by non-textual hash id's can be cached
6928                 $expires = "+1d";
6929         }
6930
6931         my $have_blame = gitweb_check_feature('blame');
6932         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6933                 or die_error(500, "Couldn't cat $file_name, $hash");
6934         my $mimetype = blob_mimetype($fd, $file_name);
6935         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6936         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6937                 close $fd;
6938                 return git_blob_plain($mimetype);
6939         }
6940         # we can have blame only for text/* mimetype
6941         $have_blame &&= ($mimetype =~ m!^text/!);
6942
6943         my $highlight = gitweb_check_feature('highlight');
6944         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6945         $fd = run_highlighter($fd, $highlight, $syntax)
6946                 if $syntax;
6947
6948         git_header_html(undef, $expires);
6949         my $formats_nav = '';
6950         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6951                 if (defined $file_name) {
6952                         if ($have_blame) {
6953                                 $formats_nav .=
6954                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6955                                                 "blame") .
6956                                         " | ";
6957                         }
6958                         $formats_nav .=
6959                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6960                                         "history") .
6961                                 " | " .
6962                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6963                                         "raw") .
6964                                 " | " .
6965                                 $cgi->a({-href => href(action=>"blob",
6966                                                        hash_base=>"HEAD", file_name=>$file_name)},
6967                                         "HEAD");
6968                 } else {
6969                         $formats_nav .=
6970                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6971                                         "raw");
6972                 }
6973                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6974                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6975         } else {
6976                 print "<div class=\"page_nav\">\n" .
6977                       "<br/><br/></div>\n" .
6978                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6979         }
6980         git_print_page_path($file_name, "blob", $hash_base);
6981         print "<div class=\"page_body\">\n";
6982         if ($mimetype =~ m!^image/!) {
6983                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6984                 if ($file_name) {
6985                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6986                 }
6987                 print qq! src="! .
6988                       href(action=>"blob_plain", hash=>$hash,
6989                            hash_base=>$hash_base, file_name=>$file_name) .
6990                       qq!" />\n!;
6991         } else {
6992                 my $nr;
6993                 while (my $line = <$fd>) {
6994                         chomp $line;
6995                         $nr++;
6996                         $line = untabify($line);
6997                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6998                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6999                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7000                 }
7001         }
7002         close $fd
7003                 or print "Reading blob failed.\n";
7004         print "</div>";
7005         git_footer_html();
7006 }
7007
7008 sub git_tree {
7009         if (!defined $hash_base) {
7010                 $hash_base = "HEAD";
7011         }
7012         if (!defined $hash) {
7013                 if (defined $file_name) {
7014                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7015                 } else {
7016                         $hash = $hash_base;
7017                 }
7018         }
7019         die_error(404, "No such tree") unless defined($hash);
7020
7021         my $show_sizes = gitweb_check_feature('show-sizes');
7022         my $have_blame = gitweb_check_feature('blame');
7023
7024         my @entries = ();
7025         {
7026                 local $/ = "\0";
7027                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7028                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7029                         or die_error(500, "Open git-ls-tree failed");
7030                 @entries = map { chomp; $_ } <$fd>;
7031                 close $fd
7032                         or die_error(404, "Reading tree failed");
7033         }
7034
7035         my $refs = git_get_references();
7036         my $ref = format_ref_marker($refs, $hash_base);
7037         git_header_html();
7038         my $basedir = '';
7039         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7040                 my @views_nav = ();
7041                 if (defined $file_name) {
7042                         push @views_nav,
7043                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7044                                         "history"),
7045                                 $cgi->a({-href => href(action=>"tree",
7046                                                        hash_base=>"HEAD", file_name=>$file_name)},
7047                                         "HEAD"),
7048                 }
7049                 my $snapshot_links = format_snapshot_links($hash);
7050                 if (defined $snapshot_links) {
7051                         # FIXME: Should be available when we have no hash base as well.
7052                         push @views_nav, $snapshot_links;
7053                 }
7054                 git_print_page_nav('tree','', $hash_base, undef, undef,
7055                                    join(' | ', @views_nav));
7056                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7057         } else {
7058                 undef $hash_base;
7059                 print "<div class=\"page_nav\">\n";
7060                 print "<br/><br/></div>\n";
7061                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7062         }
7063         if (defined $file_name) {
7064                 $basedir = $file_name;
7065                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7066                         $basedir .= '/';
7067                 }
7068                 git_print_page_path($file_name, 'tree', $hash_base);
7069         }
7070         print "<div class=\"page_body\">\n";
7071         print "<table class=\"tree\">\n";
7072         my $alternate = 1;
7073         # '..' (top directory) link if possible
7074         if (defined $hash_base &&
7075             defined $file_name && $file_name =~ m![^/]+$!) {
7076                 if ($alternate) {
7077                         print "<tr class=\"dark\">\n";
7078                 } else {
7079                         print "<tr class=\"light\">\n";
7080                 }
7081                 $alternate ^= 1;
7082
7083                 my $up = $file_name;
7084                 $up =~ s!/?[^/]+$!!;
7085                 undef $up unless $up;
7086                 # based on git_print_tree_entry
7087                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7088                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7089                 print '<td class="list">';
7090                 print $cgi->a({-href => href(action=>"tree",
7091                                              hash_base=>$hash_base,
7092                                              file_name=>$up)},
7093                               "..");
7094                 print "</td>\n";
7095                 print "<td class=\"link\"></td>\n";
7096
7097                 print "</tr>\n";
7098         }
7099         foreach my $line (@entries) {
7100                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7101
7102                 if ($alternate) {
7103                         print "<tr class=\"dark\">\n";
7104                 } else {
7105                         print "<tr class=\"light\">\n";
7106                 }
7107                 $alternate ^= 1;
7108
7109                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7110
7111                 print "</tr>\n";
7112         }
7113         print "</table>\n" .
7114               "</div>";
7115         git_footer_html();
7116 }
7117
7118 sub snapshot_name {
7119         my ($project, $hash) = @_;
7120
7121         # path/to/project.git  -> project
7122         # path/to/project/.git -> project
7123         my $name = to_utf8($project);
7124         $name =~ s,([^/])/*\.git$,$1,;
7125         $name = basename($name);
7126         # sanitize name
7127         $name =~ s/[[:cntrl:]]/?/g;
7128
7129         my $ver = $hash;
7130         if ($hash =~ /^[0-9a-fA-F]+$/) {
7131                 # shorten SHA-1 hash
7132                 my $full_hash = git_get_full_hash($project, $hash);
7133                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7134                         $ver = git_get_short_hash($project, $hash);
7135                 }
7136         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7137                 # tags don't need shortened SHA-1 hash
7138                 $ver = $1;
7139         } else {
7140                 # branches and other need shortened SHA-1 hash
7141                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7142                         $ver = $1;
7143                 }
7144                 $ver .= '-' . git_get_short_hash($project, $hash);
7145         }
7146         # in case of hierarchical branch names
7147         $ver =~ s!/!.!g;
7148
7149         # name = project-version_string
7150         $name = "$name-$ver";
7151
7152         return wantarray ? ($name, $name) : $name;
7153 }
7154
7155 sub git_snapshot {
7156         my $format = $input_params{'snapshot_format'};
7157         if (!@snapshot_fmts) {
7158                 die_error(403, "Snapshots not allowed");
7159         }
7160         # default to first supported snapshot format
7161         $format ||= $snapshot_fmts[0];
7162         if ($format !~ m/^[a-z0-9]+$/) {
7163                 die_error(400, "Invalid snapshot format parameter");
7164         } elsif (!exists($known_snapshot_formats{$format})) {
7165                 die_error(400, "Unknown snapshot format");
7166         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7167                 die_error(403, "Snapshot format not allowed");
7168         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7169                 die_error(403, "Unsupported snapshot format");
7170         }
7171
7172         my $type = git_get_type("$hash^{}");
7173         if (!$type) {
7174                 die_error(404, 'Object does not exist');
7175         }  elsif ($type eq 'blob') {
7176                 die_error(400, 'Object is not a tree-ish');
7177         }
7178
7179         my ($name, $prefix) = snapshot_name($project, $hash);
7180         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7181         my $cmd = quote_command(
7182                 git_cmd(), 'archive',
7183                 "--format=$known_snapshot_formats{$format}{'format'}",
7184                 "--prefix=$prefix/", $hash);
7185         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7186                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7187         }
7188
7189         $filename =~ s/(["\\])/\\$1/g;
7190         print $cgi->header(
7191                 -type => $known_snapshot_formats{$format}{'type'},
7192                 -content_disposition => 'inline; filename="' . $filename . '"',
7193                 -status => '200 OK');
7194
7195         open my $fd, "-|", $cmd
7196                 or die_error(500, "Execute git-archive failed");
7197         binmode STDOUT, ':raw';
7198         print <$fd>;
7199         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7200         close $fd;
7201 }
7202
7203 sub git_log_generic {
7204         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7205
7206         my $head = git_get_head_hash($project);
7207         if (!defined $base) {
7208                 $base = $head;
7209         }
7210         if (!defined $page) {
7211                 $page = 0;
7212         }
7213         my $refs = git_get_references();
7214
7215         my $commit_hash = $base;
7216         if (defined $parent) {
7217                 $commit_hash = "$parent..$base";
7218         }
7219         my @commitlist =
7220                 parse_commits($commit_hash, 101, (100 * $page),
7221                               defined $file_name ? ($file_name, "--full-history") : ());
7222
7223         my $ftype;
7224         if (!defined $file_hash && defined $file_name) {
7225                 # some commits could have deleted file in question,
7226                 # and not have it in tree, but one of them has to have it
7227                 for (my $i = 0; $i < @commitlist; $i++) {
7228                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7229                         last if defined $file_hash;
7230                 }
7231         }
7232         if (defined $file_hash) {
7233                 $ftype = git_get_type($file_hash);
7234         }
7235         if (defined $file_name && !defined $ftype) {
7236                 die_error(500, "Unknown type of object");
7237         }
7238         my %co;
7239         if (defined $file_name) {
7240                 %co = parse_commit($base)
7241                         or die_error(404, "Unknown commit object");
7242         }
7243
7244
7245         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7246         my $next_link = '';
7247         if ($#commitlist >= 100) {
7248                 $next_link =
7249                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7250                                  -accesskey => "n", -title => "Alt-n"}, "next");
7251         }
7252         my $patch_max = gitweb_get_feature('patches');
7253         if ($patch_max && !defined $file_name) {
7254                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7255                         $paging_nav .= " &sdot; " .
7256                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7257                                         "patches");
7258                 }
7259         }
7260
7261         git_header_html();
7262         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7263         if (defined $file_name) {
7264                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7265         } else {
7266                 git_print_header_div('summary', $project)
7267         }
7268         git_print_page_path($file_name, $ftype, $hash_base)
7269                 if (defined $file_name);
7270
7271         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7272                      $file_name, $file_hash, $ftype);
7273
7274         git_footer_html();
7275 }
7276
7277 sub git_log {
7278         git_log_generic('log', \&git_log_body,
7279                         $hash, $hash_parent);
7280 }
7281
7282 sub git_commit {
7283         $hash ||= $hash_base || "HEAD";
7284         my %co = parse_commit($hash)
7285             or die_error(404, "Unknown commit object");
7286
7287         my $parent  = $co{'parent'};
7288         my $parents = $co{'parents'}; # listref
7289
7290         # we need to prepare $formats_nav before any parameter munging
7291         my $formats_nav;
7292         if (!defined $parent) {
7293                 # --root commitdiff
7294                 $formats_nav .= '(initial)';
7295         } elsif (@$parents == 1) {
7296                 # single parent commit
7297                 $formats_nav .=
7298                         '(parent: ' .
7299                         $cgi->a({-href => href(action=>"commit",
7300                                                hash=>$parent)},
7301                                 esc_html(substr($parent, 0, 7))) .
7302                         ')';
7303         } else {
7304                 # merge commit
7305                 $formats_nav .=
7306                         '(merge: ' .
7307                         join(' ', map {
7308                                 $cgi->a({-href => href(action=>"commit",
7309                                                        hash=>$_)},
7310                                         esc_html(substr($_, 0, 7)));
7311                         } @$parents ) .
7312                         ')';
7313         }
7314         if (gitweb_check_feature('patches') && @$parents <= 1) {
7315                 $formats_nav .= " | " .
7316                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7317                                 "patch");
7318         }
7319
7320         if (!defined $parent) {
7321                 $parent = "--root";
7322         }
7323         my @difftree;
7324         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7325                 @diff_opts,
7326                 (@$parents <= 1 ? $parent : '-c'),
7327                 $hash, "--"
7328                 or die_error(500, "Open git-diff-tree failed");
7329         @difftree = map { chomp; $_ } <$fd>;
7330         close $fd or die_error(404, "Reading git-diff-tree failed");
7331
7332         # non-textual hash id's can be cached
7333         my $expires;
7334         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7335                 $expires = "+1d";
7336         }
7337         my $refs = git_get_references();
7338         my $ref = format_ref_marker($refs, $co{'id'});
7339
7340         git_header_html(undef, $expires);
7341         git_print_page_nav('commit', '',
7342                            $hash, $co{'tree'}, $hash,
7343                            $formats_nav);
7344
7345         if (defined $co{'parent'}) {
7346                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7347         } else {
7348                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7349         }
7350         print "<div class=\"title_text\">\n" .
7351               "<table class=\"object_header\">\n";
7352         git_print_authorship_rows(\%co);
7353         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7354         print "<tr>" .
7355               "<td>tree</td>" .
7356               "<td class=\"sha1\">" .
7357               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7358                        class => "list"}, $co{'tree'}) .
7359               "</td>" .
7360               "<td class=\"link\">" .
7361               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7362                       "tree");
7363         my $snapshot_links = format_snapshot_links($hash);
7364         if (defined $snapshot_links) {
7365                 print " | " . $snapshot_links;
7366         }
7367         print "</td>" .
7368               "</tr>\n";
7369
7370         foreach my $par (@$parents) {
7371                 print "<tr>" .
7372                       "<td>parent</td>" .
7373                       "<td class=\"sha1\">" .
7374                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7375                                class => "list"}, $par) .
7376                       "</td>" .
7377                       "<td class=\"link\">" .
7378                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7379                       " | " .
7380                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7381                       "</td>" .
7382                       "</tr>\n";
7383         }
7384         print "</table>".
7385               "</div>\n";
7386
7387         print "<div class=\"page_body\">\n";
7388         git_print_log($co{'comment'});
7389         print "</div>\n";
7390
7391         git_difftree_body(\@difftree, $hash, @$parents);
7392
7393         git_footer_html();
7394 }
7395
7396 sub git_object {
7397         # object is defined by:
7398         # - hash or hash_base alone
7399         # - hash_base and file_name
7400         my $type;
7401
7402         # - hash or hash_base alone
7403         if ($hash || ($hash_base && !defined $file_name)) {
7404                 my $object_id = $hash || $hash_base;
7405
7406                 open my $fd, "-|", quote_command(
7407                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7408                         or die_error(404, "Object does not exist");
7409                 $type = <$fd>;
7410                 chomp $type;
7411                 close $fd
7412                         or die_error(404, "Object does not exist");
7413
7414         # - hash_base and file_name
7415         } elsif ($hash_base && defined $file_name) {
7416                 $file_name =~ s,/+$,,;
7417
7418                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7419                         or die_error(404, "Base object does not exist");
7420
7421                 # here errors should not hapen
7422                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7423                         or die_error(500, "Open git-ls-tree failed");
7424                 my $line = <$fd>;
7425                 close $fd;
7426
7427                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7428                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7429                         die_error(404, "File or directory for given base does not exist");
7430                 }
7431                 $type = $2;
7432                 $hash = $3;
7433         } else {
7434                 die_error(400, "Not enough information to find object");
7435         }
7436
7437         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7438                                           hash=>$hash, hash_base=>$hash_base,
7439                                           file_name=>$file_name),
7440                              -status => '302 Found');
7441 }
7442
7443 sub git_blobdiff {
7444         my $format = shift || 'html';
7445         my $diff_style = $input_params{'diff_style'} || 'inline';
7446
7447         my $fd;
7448         my @difftree;
7449         my %diffinfo;
7450         my $expires;
7451
7452         # preparing $fd and %diffinfo for git_patchset_body
7453         # new style URI
7454         if (defined $hash_base && defined $hash_parent_base) {
7455                 if (defined $file_name) {
7456                         # read raw output
7457                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7458                                 $hash_parent_base, $hash_base,
7459                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7460                                 or die_error(500, "Open git-diff-tree failed");
7461                         @difftree = map { chomp; $_ } <$fd>;
7462                         close $fd
7463                                 or die_error(404, "Reading git-diff-tree failed");
7464                         @difftree
7465                                 or die_error(404, "Blob diff not found");
7466
7467                 } elsif (defined $hash &&
7468                          $hash =~ /[0-9a-fA-F]{40}/) {
7469                         # try to find filename from $hash
7470
7471                         # read filtered raw output
7472                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7473                                 $hash_parent_base, $hash_base, "--"
7474                                 or die_error(500, "Open git-diff-tree failed");
7475                         @difftree =
7476                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7477                                 # $hash == to_id
7478                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7479                                 map { chomp; $_ } <$fd>;
7480                         close $fd
7481                                 or die_error(404, "Reading git-diff-tree failed");
7482                         @difftree
7483                                 or die_error(404, "Blob diff not found");
7484
7485                 } else {
7486                         die_error(400, "Missing one of the blob diff parameters");
7487                 }
7488
7489                 if (@difftree > 1) {
7490                         die_error(400, "Ambiguous blob diff specification");
7491                 }
7492
7493                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7494                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7495                 $file_name   ||= $diffinfo{'to_file'};
7496
7497                 $hash_parent ||= $diffinfo{'from_id'};
7498                 $hash        ||= $diffinfo{'to_id'};
7499
7500                 # non-textual hash id's can be cached
7501                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7502                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7503                         $expires = '+1d';
7504                 }
7505
7506                 # open patch output
7507                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7508                         '-p', ($format eq 'html' ? "--full-index" : ()),
7509                         $hash_parent_base, $hash_base,
7510                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7511                         or die_error(500, "Open git-diff-tree failed");
7512         }
7513
7514         # old/legacy style URI -- not generated anymore since 1.4.3.
7515         if (!%diffinfo) {
7516                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7517         }
7518
7519         # header
7520         if ($format eq 'html') {
7521                 my $formats_nav =
7522                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7523                                 "raw");
7524                 $formats_nav .= diff_style_nav($diff_style);
7525                 git_header_html(undef, $expires);
7526                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7527                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7528                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7529                 } else {
7530                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7531                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7532                 }
7533                 if (defined $file_name) {
7534                         git_print_page_path($file_name, "blob", $hash_base);
7535                 } else {
7536                         print "<div class=\"page_path\"></div>\n";
7537                 }
7538
7539         } elsif ($format eq 'plain') {
7540                 print $cgi->header(
7541                         -type => 'text/plain',
7542                         -charset => 'utf-8',
7543                         -expires => $expires,
7544                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7545
7546                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7547
7548         } else {
7549                 die_error(400, "Unknown blobdiff format");
7550         }
7551
7552         # patch
7553         if ($format eq 'html') {
7554                 print "<div class=\"page_body\">\n";
7555
7556                 git_patchset_body($fd, $diff_style,
7557                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7558                 close $fd;
7559
7560                 print "</div>\n"; # class="page_body"
7561                 git_footer_html();
7562
7563         } else {
7564                 while (my $line = <$fd>) {
7565                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7566                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7567
7568                         print $line;
7569
7570                         last if $line =~ m!^\+\+\+!;
7571                 }
7572                 local $/ = undef;
7573                 print <$fd>;
7574                 close $fd;
7575         }
7576 }
7577
7578 sub git_blobdiff_plain {
7579         git_blobdiff('plain');
7580 }
7581
7582 # assumes that it is added as later part of already existing navigation,
7583 # so it returns "| foo | bar" rather than just "foo | bar"
7584 sub diff_style_nav {
7585         my ($diff_style, $is_combined) = @_;
7586         $diff_style ||= 'inline';
7587
7588         return "" if ($is_combined);
7589
7590         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7591         my %styles = @styles;
7592         @styles =
7593                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7594
7595         return join '',
7596                 map { " | ".$_ }
7597                 map {
7598                         $_ eq $diff_style ? $styles{$_} :
7599                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7600                 } @styles;
7601 }
7602
7603 sub git_commitdiff {
7604         my %params = @_;
7605         my $format = $params{-format} || 'html';
7606         my $diff_style = $input_params{'diff_style'} || 'inline';
7607
7608         my ($patch_max) = gitweb_get_feature('patches');
7609         if ($format eq 'patch') {
7610                 die_error(403, "Patch view not allowed") unless $patch_max;
7611         }
7612
7613         $hash ||= $hash_base || "HEAD";
7614         my %co = parse_commit($hash)
7615             or die_error(404, "Unknown commit object");
7616
7617         # choose format for commitdiff for merge
7618         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7619                 $hash_parent = '--cc';
7620         }
7621         # we need to prepare $formats_nav before almost any parameter munging
7622         my $formats_nav;
7623         if ($format eq 'html') {
7624                 $formats_nav =
7625                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7626                                 "raw");
7627                 if ($patch_max && @{$co{'parents'}} <= 1) {
7628                         $formats_nav .= " | " .
7629                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7630                                         "patch");
7631                 }
7632                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7633
7634                 if (defined $hash_parent &&
7635                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7636                         # commitdiff with two commits given
7637                         my $hash_parent_short = $hash_parent;
7638                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7639                                 $hash_parent_short = substr($hash_parent, 0, 7);
7640                         }
7641                         $formats_nav .=
7642                                 ' (from';
7643                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7644                                 if ($co{'parents'}[$i] eq $hash_parent) {
7645                                         $formats_nav .= ' parent ' . ($i+1);
7646                                         last;
7647                                 }
7648                         }
7649                         $formats_nav .= ': ' .
7650                                 $cgi->a({-href => href(-replay=>1,
7651                                                        hash=>$hash_parent, hash_base=>undef)},
7652                                         esc_html($hash_parent_short)) .
7653                                 ')';
7654                 } elsif (!$co{'parent'}) {
7655                         # --root commitdiff
7656                         $formats_nav .= ' (initial)';
7657                 } elsif (scalar @{$co{'parents'}} == 1) {
7658                         # single parent commit
7659                         $formats_nav .=
7660                                 ' (parent: ' .
7661                                 $cgi->a({-href => href(-replay=>1,
7662                                                        hash=>$co{'parent'}, hash_base=>undef)},
7663                                         esc_html(substr($co{'parent'}, 0, 7))) .
7664                                 ')';
7665                 } else {
7666                         # merge commit
7667                         if ($hash_parent eq '--cc') {
7668                                 $formats_nav .= ' | ' .
7669                                         $cgi->a({-href => href(-replay=>1,
7670                                                                hash=>$hash, hash_parent=>'-c')},
7671                                                 'combined');
7672                         } else { # $hash_parent eq '-c'
7673                                 $formats_nav .= ' | ' .
7674                                         $cgi->a({-href => href(-replay=>1,
7675                                                                hash=>$hash, hash_parent=>'--cc')},
7676                                                 'compact');
7677                         }
7678                         $formats_nav .=
7679                                 ' (merge: ' .
7680                                 join(' ', map {
7681                                         $cgi->a({-href => href(-replay=>1,
7682                                                                hash=>$_, hash_base=>undef)},
7683                                                 esc_html(substr($_, 0, 7)));
7684                                 } @{$co{'parents'}} ) .
7685                                 ')';
7686                 }
7687         }
7688
7689         my $hash_parent_param = $hash_parent;
7690         if (!defined $hash_parent_param) {
7691                 # --cc for multiple parents, --root for parentless
7692                 $hash_parent_param =
7693                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7694         }
7695
7696         # read commitdiff
7697         my $fd;
7698         my @difftree;
7699         if ($format eq 'html') {
7700                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7701                         "--no-commit-id", "--patch-with-raw", "--full-index",
7702                         $hash_parent_param, $hash, "--"
7703                         or die_error(500, "Open git-diff-tree failed");
7704
7705                 while (my $line = <$fd>) {
7706                         chomp $line;
7707                         # empty line ends raw part of diff-tree output
7708                         last unless $line;
7709                         push @difftree, scalar parse_difftree_raw_line($line);
7710                 }
7711
7712         } elsif ($format eq 'plain') {
7713                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7714                         '-p', $hash_parent_param, $hash, "--"
7715                         or die_error(500, "Open git-diff-tree failed");
7716         } elsif ($format eq 'patch') {
7717                 # For commit ranges, we limit the output to the number of
7718                 # patches specified in the 'patches' feature.
7719                 # For single commits, we limit the output to a single patch,
7720                 # diverging from the git-format-patch default.
7721                 my @commit_spec = ();
7722                 if ($hash_parent) {
7723                         if ($patch_max > 0) {
7724                                 push @commit_spec, "-$patch_max";
7725                         }
7726                         push @commit_spec, '-n', "$hash_parent..$hash";
7727                 } else {
7728                         if ($params{-single}) {
7729                                 push @commit_spec, '-1';
7730                         } else {
7731                                 if ($patch_max > 0) {
7732                                         push @commit_spec, "-$patch_max";
7733                                 }
7734                                 push @commit_spec, "-n";
7735                         }
7736                         push @commit_spec, '--root', $hash;
7737                 }
7738                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7739                         '--encoding=utf8', '--stdout', @commit_spec
7740                         or die_error(500, "Open git-format-patch failed");
7741         } else {
7742                 die_error(400, "Unknown commitdiff format");
7743         }
7744
7745         # non-textual hash id's can be cached
7746         my $expires;
7747         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7748                 $expires = "+1d";
7749         }
7750
7751         # write commit message
7752         if ($format eq 'html') {
7753                 my $refs = git_get_references();
7754                 my $ref = format_ref_marker($refs, $co{'id'});
7755
7756                 git_header_html(undef, $expires);
7757                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7758                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7759                 print "<div class=\"title_text\">\n" .
7760                       "<table class=\"object_header\">\n";
7761                 git_print_authorship_rows(\%co);
7762                 print "</table>".
7763                       "</div>\n";
7764                 print "<div class=\"page_body\">\n";
7765                 if (@{$co{'comment'}} > 1) {
7766                         print "<div class=\"log\">\n";
7767                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7768                         print "</div>\n"; # class="log"
7769                 }
7770
7771         } elsif ($format eq 'plain') {
7772                 my $refs = git_get_references("tags");
7773                 my $tagname = git_get_rev_name_tags($hash);
7774                 my $filename = basename($project) . "-$hash.patch";
7775
7776                 print $cgi->header(
7777                         -type => 'text/plain',
7778                         -charset => 'utf-8',
7779                         -expires => $expires,
7780                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7781                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7782                 print "From: " . to_utf8($co{'author'}) . "\n";
7783                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7784                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7785
7786                 print "X-Git-Tag: $tagname\n" if $tagname;
7787                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7788
7789                 foreach my $line (@{$co{'comment'}}) {
7790                         print to_utf8($line) . "\n";
7791                 }
7792                 print "---\n\n";
7793         } elsif ($format eq 'patch') {
7794                 my $filename = basename($project) . "-$hash.patch";
7795
7796                 print $cgi->header(
7797                         -type => 'text/plain',
7798                         -charset => 'utf-8',
7799                         -expires => $expires,
7800                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7801         }
7802
7803         # write patch
7804         if ($format eq 'html') {
7805                 my $use_parents = !defined $hash_parent ||
7806                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7807                 git_difftree_body(\@difftree, $hash,
7808                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7809                 print "<br/>\n";
7810
7811                 git_patchset_body($fd, $diff_style,
7812                                   \@difftree, $hash,
7813                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7814                 close $fd;
7815                 print "</div>\n"; # class="page_body"
7816                 git_footer_html();
7817
7818         } elsif ($format eq 'plain') {
7819                 local $/ = undef;
7820                 print <$fd>;
7821                 close $fd
7822                         or print "Reading git-diff-tree failed\n";
7823         } elsif ($format eq 'patch') {
7824                 local $/ = undef;
7825                 print <$fd>;
7826                 close $fd
7827                         or print "Reading git-format-patch failed\n";
7828         }
7829 }
7830
7831 sub git_commitdiff_plain {
7832         git_commitdiff(-format => 'plain');
7833 }
7834
7835 # format-patch-style patches
7836 sub git_patch {
7837         git_commitdiff(-format => 'patch', -single => 1);
7838 }
7839
7840 sub git_patches {
7841         git_commitdiff(-format => 'patch');
7842 }
7843
7844 sub git_history {
7845         git_log_generic('history', \&git_history_body,
7846                         $hash_base, $hash_parent_base,
7847                         $file_name, $hash);
7848 }
7849
7850 sub git_search {
7851         $searchtype ||= 'commit';
7852
7853         # check if appropriate features are enabled
7854         gitweb_check_feature('search')
7855                 or die_error(403, "Search is disabled");
7856         if ($searchtype eq 'pickaxe') {
7857                 # pickaxe may take all resources of your box and run for several minutes
7858                 # with every query - so decide by yourself how public you make this feature
7859                 gitweb_check_feature('pickaxe')
7860                         or die_error(403, "Pickaxe search is disabled");
7861         }
7862         if ($searchtype eq 'grep') {
7863                 # grep search might be potentially CPU-intensive, too
7864                 gitweb_check_feature('grep')
7865                         or die_error(403, "Grep search is disabled");
7866         }
7867
7868         if (!defined $searchtext) {
7869                 die_error(400, "Text field is empty");
7870         }
7871         if (!defined $hash) {
7872                 $hash = git_get_head_hash($project);
7873         }
7874         my %co = parse_commit($hash);
7875         if (!%co) {
7876                 die_error(404, "Unknown commit object");
7877         }
7878         if (!defined $page) {
7879                 $page = 0;
7880         }
7881
7882         if ($searchtype eq 'commit' ||
7883             $searchtype eq 'author' ||
7884             $searchtype eq 'committer') {
7885                 git_search_message(%co);
7886         } elsif ($searchtype eq 'pickaxe') {
7887                 git_search_changes(%co);
7888         } elsif ($searchtype eq 'grep') {
7889                 git_search_files(%co);
7890         } else {
7891                 die_error(400, "Unknown search type");
7892         }
7893 }
7894
7895 sub git_search_help {
7896         git_header_html();
7897         git_print_page_nav('','', $hash,$hash,$hash);
7898         print <<EOT;
7899 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7900 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7901 the pattern entered is recognized as the POSIX extended
7902 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7903 insensitive).</p>
7904 <dl>
7905 <dt><b>commit</b></dt>
7906 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7907 EOT
7908         my $have_grep = gitweb_check_feature('grep');
7909         if ($have_grep) {
7910                 print <<EOT;
7911 <dt><b>grep</b></dt>
7912 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7913     a different one) are searched for the given pattern. On large trees, this search can take
7914 a while and put some strain on the server, so please use it with some consideration. Note that
7915 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7916 case-sensitive.</dd>
7917 EOT
7918         }
7919         print <<EOT;
7920 <dt><b>author</b></dt>
7921 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7922 <dt><b>committer</b></dt>
7923 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7924 EOT
7925         my $have_pickaxe = gitweb_check_feature('pickaxe');
7926         if ($have_pickaxe) {
7927                 print <<EOT;
7928 <dt><b>pickaxe</b></dt>
7929 <dd>All commits that caused the string to appear or disappear from any file (changes that
7930 added, removed or "modified" the string) will be listed. This search can take a while and
7931 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7932 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7933 EOT
7934         }
7935         print "</dl>\n";
7936         git_footer_html();
7937 }
7938
7939 sub git_shortlog {
7940         git_log_generic('shortlog', \&git_shortlog_body,
7941                         $hash, $hash_parent);
7942 }
7943
7944 ## ......................................................................
7945 ## feeds (RSS, Atom; OPML)
7946
7947 sub git_feed {
7948         my $format = shift || 'atom';
7949         my $have_blame = gitweb_check_feature('blame');
7950
7951         # Atom: http://www.atomenabled.org/developers/syndication/
7952         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7953         if ($format ne 'rss' && $format ne 'atom') {
7954                 die_error(400, "Unknown web feed format");
7955         }
7956
7957         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7958         my $head = $hash || 'HEAD';
7959         my @commitlist = parse_commits($head, 150, 0, $file_name);
7960
7961         my %latest_commit;
7962         my %latest_date;
7963         my $content_type = "application/$format+xml";
7964         if (defined $cgi->http('HTTP_ACCEPT') &&
7965                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7966                 # browser (feed reader) prefers text/xml
7967                 $content_type = 'text/xml';
7968         }
7969         if (defined($commitlist[0])) {
7970                 %latest_commit = %{$commitlist[0]};
7971                 my $latest_epoch = $latest_commit{'committer_epoch'};
7972                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7973                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7974                 if (defined $if_modified) {
7975                         my $since;
7976                         if (eval { require HTTP::Date; 1; }) {
7977                                 $since = HTTP::Date::str2time($if_modified);
7978                         } elsif (eval { require Time::ParseDate; 1; }) {
7979                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7980                         }
7981                         if (defined $since && $latest_epoch <= $since) {
7982                                 print $cgi->header(
7983                                         -type => $content_type,
7984                                         -charset => 'utf-8',
7985                                         -last_modified => $latest_date{'rfc2822'},
7986                                         -status => '304 Not Modified');
7987                                 return;
7988                         }
7989                 }
7990                 print $cgi->header(
7991                         -type => $content_type,
7992                         -charset => 'utf-8',
7993                         -last_modified => $latest_date{'rfc2822'});
7994         } else {
7995                 print $cgi->header(
7996                         -type => $content_type,
7997                         -charset => 'utf-8');
7998         }
7999
8000         # Optimization: skip generating the body if client asks only
8001         # for Last-Modified date.
8002         return if ($cgi->request_method() eq 'HEAD');
8003
8004         # header variables
8005         my $title = "$site_name - $project/$action";
8006         my $feed_type = 'log';
8007         if (defined $hash) {
8008                 $title .= " - '$hash'";
8009                 $feed_type = 'branch log';
8010                 if (defined $file_name) {
8011                         $title .= " :: $file_name";
8012                         $feed_type = 'history';
8013                 }
8014         } elsif (defined $file_name) {
8015                 $title .= " - $file_name";
8016                 $feed_type = 'history';
8017         }
8018         $title .= " $feed_type";
8019         my $descr = git_get_project_description($project);
8020         if (defined $descr) {
8021                 $descr = esc_html($descr);
8022         } else {
8023                 $descr = "$project " .
8024                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8025                          " feed";
8026         }
8027         my $owner = git_get_project_owner($project);
8028         $owner = esc_html($owner);
8029
8030         #header
8031         my $alt_url;
8032         if (defined $file_name) {
8033                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8034         } elsif (defined $hash) {
8035                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8036         } else {
8037                 $alt_url = href(-full=>1, action=>"summary");
8038         }
8039         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8040         if ($format eq 'rss') {
8041                 print <<XML;
8042 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8043 <channel>
8044 XML
8045                 print "<title>$title</title>\n" .
8046                       "<link>$alt_url</link>\n" .
8047                       "<description>$descr</description>\n" .
8048                       "<language>en</language>\n" .
8049                       # project owner is responsible for 'editorial' content
8050                       "<managingEditor>$owner</managingEditor>\n";
8051                 if (defined $logo || defined $favicon) {
8052                         # prefer the logo to the favicon, since RSS
8053                         # doesn't allow both
8054                         my $img = esc_url($logo || $favicon);
8055                         print "<image>\n" .
8056                               "<url>$img</url>\n" .
8057                               "<title>$title</title>\n" .
8058                               "<link>$alt_url</link>\n" .
8059                               "</image>\n";
8060                 }
8061                 if (%latest_date) {
8062                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8063                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8064                 }
8065                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8066         } elsif ($format eq 'atom') {
8067                 print <<XML;
8068 <feed xmlns="http://www.w3.org/2005/Atom">
8069 XML
8070                 print "<title>$title</title>\n" .
8071                       "<subtitle>$descr</subtitle>\n" .
8072                       '<link rel="alternate" type="text/html" href="' .
8073                       $alt_url . '" />' . "\n" .
8074                       '<link rel="self" type="' . $content_type . '" href="' .
8075                       $cgi->self_url() . '" />' . "\n" .
8076                       "<id>" . href(-full=>1) . "</id>\n" .
8077                       # use project owner for feed author
8078                       "<author><name>$owner</name></author>\n";
8079                 if (defined $favicon) {
8080                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8081                 }
8082                 if (defined $logo) {
8083                         # not twice as wide as tall: 72 x 27 pixels
8084                         print "<logo>" . esc_url($logo) . "</logo>\n";
8085                 }
8086                 if (! %latest_date) {
8087                         # dummy date to keep the feed valid until commits trickle in:
8088                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8089                 } else {
8090                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8091                 }
8092                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8093         }
8094
8095         # contents
8096         for (my $i = 0; $i <= $#commitlist; $i++) {
8097                 my %co = %{$commitlist[$i]};
8098                 my $commit = $co{'id'};
8099                 # we read 150, we always show 30 and the ones more recent than 48 hours
8100                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8101                         last;
8102                 }
8103                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8104
8105                 # get list of changed files
8106                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8107                         $co{'parent'} || "--root",
8108                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8109                         or next;
8110                 my @difftree = map { chomp; $_ } <$fd>;
8111                 close $fd
8112                         or next;
8113
8114                 # print element (entry, item)
8115                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8116                 if ($format eq 'rss') {
8117                         print "<item>\n" .
8118                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8119                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8120                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8121                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8122                               "<link>$co_url</link>\n" .
8123                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8124                               "<content:encoded>" .
8125                               "<![CDATA[\n";
8126                 } elsif ($format eq 'atom') {
8127                         print "<entry>\n" .
8128                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8129                               "<updated>$cd{'iso-8601'}</updated>\n" .
8130                               "<author>\n" .
8131                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8132                         if ($co{'author_email'}) {
8133                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8134                         }
8135                         print "</author>\n" .
8136                               # use committer for contributor
8137                               "<contributor>\n" .
8138                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8139                         if ($co{'committer_email'}) {
8140                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8141                         }
8142                         print "</contributor>\n" .
8143                               "<published>$cd{'iso-8601'}</published>\n" .
8144                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8145                               "<id>$co_url</id>\n" .
8146                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8147                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8148                 }
8149                 my $comment = $co{'comment'};
8150                 print "<pre>\n";
8151                 foreach my $line (@$comment) {
8152                         $line = esc_html($line);
8153                         print "$line\n";
8154                 }
8155                 print "</pre><ul>\n";
8156                 foreach my $difftree_line (@difftree) {
8157                         my %difftree = parse_difftree_raw_line($difftree_line);
8158                         next if !$difftree{'from_id'};
8159
8160                         my $file = $difftree{'file'} || $difftree{'to_file'};
8161
8162                         print "<li>" .
8163                               "[" .
8164                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8165                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8166                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8167                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8168                                       -title => "diff"}, 'D');
8169                         if ($have_blame) {
8170                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8171                                                              file_name=>$file, hash_base=>$commit),
8172                                               -title => "blame"}, 'B');
8173                         }
8174                         # if this is not a feed of a file history
8175                         if (!defined $file_name || $file_name ne $file) {
8176                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8177                                                              file_name=>$file, hash=>$commit),
8178                                               -title => "history"}, 'H');
8179                         }
8180                         $file = esc_path($file);
8181                         print "] ".
8182                               "$file</li>\n";
8183                 }
8184                 if ($format eq 'rss') {
8185                         print "</ul>]]>\n" .
8186                               "</content:encoded>\n" .
8187                               "</item>\n";
8188                 } elsif ($format eq 'atom') {
8189                         print "</ul>\n</div>\n" .
8190                               "</content>\n" .
8191                               "</entry>\n";
8192                 }
8193         }
8194
8195         # end of feed
8196         if ($format eq 'rss') {
8197                 print "</channel>\n</rss>\n";
8198         } elsif ($format eq 'atom') {
8199                 print "</feed>\n";
8200         }
8201 }
8202
8203 sub git_rss {
8204         git_feed('rss');
8205 }
8206
8207 sub git_atom {
8208         git_feed('atom');
8209 }
8210
8211 sub git_opml {
8212         my @list = git_get_projects_list($project_filter, $strict_export);
8213         if (!@list) {
8214                 die_error(404, "No projects found");
8215         }
8216
8217         print $cgi->header(
8218                 -type => 'text/xml',
8219                 -charset => 'utf-8',
8220                 -content_disposition => 'inline; filename="opml.xml"');
8221
8222         my $title = esc_html($site_name);
8223         my $filter = " within subdirectory ";
8224         if (defined $project_filter) {
8225                 $filter .= esc_html($project_filter);
8226         } else {
8227                 $filter = "";
8228         }
8229         print <<XML;
8230 <?xml version="1.0" encoding="utf-8"?>
8231 <opml version="1.0">
8232 <head>
8233   <title>$title OPML Export$filter</title>
8234 </head>
8235 <body>
8236 <outline text="git RSS feeds">
8237 XML
8238
8239         foreach my $pr (@list) {
8240                 my %proj = %$pr;
8241                 my $head = git_get_head_hash($proj{'path'});
8242                 if (!defined $head) {
8243                         next;
8244                 }
8245                 $git_dir = "$projectroot/$proj{'path'}";
8246                 my %co = parse_commit($head);
8247                 if (!%co) {
8248                         next;
8249                 }
8250
8251                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8252                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8253                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8254                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8255         }
8256         print <<XML;
8257 </outline>
8258 </body>
8259 </opml>
8260 XML
8261 }