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{'extra_options'} = undef;
3905                         $href_params{'action'} = $type;
3906                         $link_attr{'-href'} = href(%href_params);
3907                         print "<link ".
3908                               "rel=\"$link_attr{'-rel'}\" ".
3909                               "title=\"$link_attr{'-title'}\" ".
3910                               "href=\"$link_attr{'-href'}\" ".
3911                               "type=\"$link_attr{'-type'}\" ".
3912                               "/>\n";
3913
3914                         $href_params{'extra_options'} = '--no-merges';
3915                         $link_attr{'-href'} = href(%href_params);
3916                         $link_attr{'-title'} .= ' (no merges)';
3917                         print "<link ".
3918                               "rel=\"$link_attr{'-rel'}\" ".
3919                               "title=\"$link_attr{'-title'}\" ".
3920                               "href=\"$link_attr{'-href'}\" ".
3921                               "type=\"$link_attr{'-type'}\" ".
3922                               "/>\n";
3923                 }
3924
3925         } else {
3926                 printf('<link rel="alternate" title="%s projects list" '.
3927                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3928                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3929                 printf('<link rel="alternate" title="%s projects feeds" '.
3930                        'href="%s" type="text/x-opml" />'."\n",
3931                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3932         }
3933 }
3934
3935 sub print_header_links {
3936         my $status = shift;
3937
3938         # print out each stylesheet that exist, providing backwards capability
3939         # for those people who defined $stylesheet in a config file
3940         if (defined $stylesheet) {
3941                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3942         } else {
3943                 foreach my $stylesheet (@stylesheets) {
3944                         next unless $stylesheet;
3945                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3946                 }
3947         }
3948         print_feed_meta()
3949                 if ($status eq '200 OK');
3950         if (defined $favicon) {
3951                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3952         }
3953 }
3954
3955 sub print_nav_breadcrumbs_path {
3956         my $dirprefix = undef;
3957         while (my $part = shift) {
3958                 $dirprefix .= "/" if defined $dirprefix;
3959                 $dirprefix .= $part;
3960                 print $cgi->a({-href => href(project => undef,
3961                                              project_filter => $dirprefix,
3962                                              action => "project_list")},
3963                               esc_html($part)) . " / ";
3964         }
3965 }
3966
3967 sub print_nav_breadcrumbs {
3968         my %opts = @_;
3969
3970         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3971         if (defined $project) {
3972                 my @dirname = split '/', $project;
3973                 my $projectbasename = pop @dirname;
3974                 print_nav_breadcrumbs_path(@dirname);
3975                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3976                 if (defined $action) {
3977                         my $action_print = $action ;
3978                         if (defined $opts{-action_extra}) {
3979                                 $action_print = $cgi->a({-href => href(action=>$action)},
3980                                         $action);
3981                         }
3982                         print " / $action_print";
3983                 }
3984                 if (defined $opts{-action_extra}) {
3985                         print " / $opts{-action_extra}";
3986                 }
3987                 print "\n";
3988         } elsif (defined $project_filter) {
3989                 print_nav_breadcrumbs_path(split '/', $project_filter);
3990         }
3991 }
3992
3993 sub print_search_form {
3994         if (!defined $searchtext) {
3995                 $searchtext = "";
3996         }
3997         my $search_hash;
3998         if (defined $hash_base) {
3999                 $search_hash = $hash_base;
4000         } elsif (defined $hash) {
4001                 $search_hash = $hash;
4002         } else {
4003                 $search_hash = "HEAD";
4004         }
4005         my $action = $my_uri;
4006         my $use_pathinfo = gitweb_check_feature('pathinfo');
4007         if ($use_pathinfo) {
4008                 $action .= "/".esc_url($project);
4009         }
4010         print $cgi->startform(-method => "get", -action => $action) .
4011               "<div class=\"search\">\n" .
4012               (!$use_pathinfo &&
4013               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4014               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4015               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4016               $cgi->popup_menu(-name => 'st', -default => 'commit',
4017                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4018               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4019               " search:\n",
4020               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4021               "<span title=\"Extended regular expression\">" .
4022               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4023                              -checked => $search_use_regexp) .
4024               "</span>" .
4025               "</div>" .
4026               $cgi->end_form() . "\n";
4027 }
4028
4029 sub git_header_html {
4030         my $status = shift || "200 OK";
4031         my $expires = shift;
4032         my %opts = @_;
4033
4034         my $title = get_page_title();
4035         my $content_type = get_content_type_html();
4036         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4037                            -status=> $status, -expires => $expires)
4038                 unless ($opts{'-no_http_header'});
4039         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4040         print <<EOF;
4041 <?xml version="1.0" encoding="utf-8"?>
4042 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4043 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4044 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4045 <!-- git core binaries version $git_version -->
4046 <head>
4047 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4048 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4049 <meta name="robots" content="index, nofollow"/>
4050 <title>$title</title>
4051 EOF
4052         # the stylesheet, favicon etc urls won't work correctly with path_info
4053         # unless we set the appropriate base URL
4054         if ($ENV{'PATH_INFO'}) {
4055                 print "<base href=\"".esc_url($base_url)."\" />\n";
4056         }
4057         print_header_links($status);
4058
4059         if (defined $site_html_head_string) {
4060                 print to_utf8($site_html_head_string);
4061         }
4062
4063         print "</head>\n" .
4064               "<body>\n";
4065
4066         if (defined $site_header && -f $site_header) {
4067                 insert_file($site_header);
4068         }
4069
4070         print "<div class=\"page_header\">\n";
4071         if (defined $logo) {
4072                 print $cgi->a({-href => esc_url($logo_url),
4073                                -title => $logo_label},
4074                               $cgi->img({-src => esc_url($logo),
4075                                          -width => 72, -height => 27,
4076                                          -alt => "git",
4077                                          -class => "logo"}));
4078         }
4079         print_nav_breadcrumbs(%opts);
4080         print "</div>\n";
4081
4082         my $have_search = gitweb_check_feature('search');
4083         if (defined $project && $have_search) {
4084                 print_search_form();
4085         }
4086 }
4087
4088 sub git_footer_html {
4089         my $feed_class = 'rss_logo';
4090
4091         print "<div class=\"page_footer\">\n";
4092         if (defined $project) {
4093                 my $descr = git_get_project_description($project);
4094                 if (defined $descr) {
4095                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4096                 }
4097
4098                 my %href_params = get_feed_info();
4099                 if (!%href_params) {
4100                         $feed_class .= ' generic';
4101                 }
4102                 $href_params{'-title'} ||= 'log';
4103
4104                 foreach my $format (qw(RSS Atom)) {
4105                         $href_params{'action'} = lc($format);
4106                         print $cgi->a({-href => href(%href_params),
4107                                       -title => "$href_params{'-title'} $format feed",
4108                                       -class => $feed_class}, $format)."\n";
4109                 }
4110
4111         } else {
4112                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4113                                              project_filter => $project_filter),
4114                               -class => $feed_class}, "OPML") . " ";
4115                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4116                                              project_filter => $project_filter),
4117                               -class => $feed_class}, "TXT") . "\n";
4118         }
4119         print "</div>\n"; # class="page_footer"
4120
4121         if (defined $t0 && gitweb_check_feature('timed')) {
4122                 print "<div id=\"generating_info\">\n";
4123                 print 'This page took '.
4124                       '<span id="generating_time" class="time_span">'.
4125                       tv_interval($t0, [ gettimeofday() ]).
4126                       ' seconds </span>'.
4127                       ' and '.
4128                       '<span id="generating_cmd">'.
4129                       $number_of_git_cmds.
4130                       '</span> git commands '.
4131                       " to generate.\n";
4132                 print "</div>\n"; # class="page_footer"
4133         }
4134
4135         if (defined $site_footer && -f $site_footer) {
4136                 insert_file($site_footer);
4137         }
4138
4139         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4140         if (defined $action &&
4141             $action eq 'blame_incremental') {
4142                 print qq!<script type="text/javascript">\n!.
4143                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4144                       qq!           "!. href() .qq!");\n!.
4145                       qq!</script>\n!;
4146         } else {
4147                 my ($jstimezone, $tz_cookie, $datetime_class) =
4148                         gitweb_get_feature('javascript-timezone');
4149
4150                 print qq!<script type="text/javascript">\n!.
4151                       qq!window.onload = function () {\n!;
4152                 if (gitweb_check_feature('javascript-actions')) {
4153                         print qq!       fixLinks();\n!;
4154                 }
4155                 if ($jstimezone && $tz_cookie && $datetime_class) {
4156                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4157                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4158                 }
4159                 print qq!};\n!.
4160                       qq!</script>\n!;
4161         }
4162
4163         print "</body>\n" .
4164               "</html>";
4165 }
4166
4167 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4168 # Example: die_error(404, 'Hash not found')
4169 # By convention, use the following status codes (as defined in RFC 2616):
4170 # 400: Invalid or missing CGI parameters, or
4171 #      requested object exists but has wrong type.
4172 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4173 #      this server or project.
4174 # 404: Requested object/revision/project doesn't exist.
4175 # 500: The server isn't configured properly, or
4176 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4177 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4178 # 503: The server is currently unavailable (because it is overloaded,
4179 #      or down for maintenance).  Generally, this is a temporary state.
4180 sub die_error {
4181         my $status = shift || 500;
4182         my $error = esc_html(shift) || "Internal Server Error";
4183         my $extra = shift;
4184         my %opts = @_;
4185
4186         my %http_responses = (
4187                 400 => '400 Bad Request',
4188                 403 => '403 Forbidden',
4189                 404 => '404 Not Found',
4190                 500 => '500 Internal Server Error',
4191                 503 => '503 Service Unavailable',
4192         );
4193         git_header_html($http_responses{$status}, undef, %opts);
4194         print <<EOF;
4195 <div class="page_body">
4196 <br /><br />
4197 $status - $error
4198 <br />
4199 EOF
4200         if (defined $extra) {
4201                 print "<hr />\n" .
4202                       "$extra\n";
4203         }
4204         print "</div>\n";
4205
4206         git_footer_html();
4207         goto DONE_GITWEB
4208                 unless ($opts{'-error_handler'});
4209 }
4210
4211 ## ----------------------------------------------------------------------
4212 ## functions printing or outputting HTML: navigation
4213
4214 sub git_print_page_nav {
4215         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4216         $extra = '' if !defined $extra; # pager or formats
4217
4218         my @navs = qw(summary shortlog log commit commitdiff tree);
4219         if ($suppress) {
4220                 @navs = grep { $_ ne $suppress } @navs;
4221         }
4222
4223         my %arg = map { $_ => {action=>$_} } @navs;
4224         if (defined $head) {
4225                 for (qw(commit commitdiff)) {
4226                         $arg{$_}{'hash'} = $head;
4227                 }
4228                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4229                         for (qw(shortlog log)) {
4230                                 $arg{$_}{'hash'} = $head;
4231                         }
4232                 }
4233         }
4234
4235         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4236         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4237
4238         my @actions = gitweb_get_feature('actions');
4239         my %repl = (
4240                 '%' => '%',
4241                 'n' => $project,         # project name
4242                 'f' => $git_dir,         # project path within filesystem
4243                 'h' => $treehead || '',  # current hash ('h' parameter)
4244                 'b' => $treebase || '',  # hash base ('hb' parameter)
4245         );
4246         while (@actions) {
4247                 my ($label, $link, $pos) = splice(@actions,0,3);
4248                 # insert
4249                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4250                 # munch munch
4251                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4252                 $arg{$label}{'_href'} = $link;
4253         }
4254
4255         print "<div class=\"page_nav\">\n" .
4256                 (join " | ",
4257                  map { $_ eq $current ?
4258                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4259                  } @navs);
4260         print "<br/>\n$extra<br/>\n" .
4261               "</div>\n";
4262 }
4263
4264 # returns a submenu for the nagivation of the refs views (tags, heads,
4265 # remotes) with the current view disabled and the remotes view only
4266 # available if the feature is enabled
4267 sub format_ref_views {
4268         my ($current) = @_;
4269         my @ref_views = qw{tags heads};
4270         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4271         return join " | ", map {
4272                 $_ eq $current ? $_ :
4273                 $cgi->a({-href => href(action=>$_)}, $_)
4274         } @ref_views
4275 }
4276
4277 sub format_paging_nav {
4278         my ($action, $page, $has_next_link) = @_;
4279         my $paging_nav;
4280
4281
4282         if ($page > 0) {
4283                 $paging_nav .=
4284                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4285                         " &sdot; " .
4286                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4287                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4288         } else {
4289                 $paging_nav .= "first &sdot; prev";
4290         }
4291
4292         if ($has_next_link) {
4293                 $paging_nav .= " &sdot; " .
4294                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4295                                  -accesskey => "n", -title => "Alt-n"}, "next");
4296         } else {
4297                 $paging_nav .= " &sdot; next";
4298         }
4299
4300         return $paging_nav;
4301 }
4302
4303 ## ......................................................................
4304 ## functions printing or outputting HTML: div
4305
4306 sub git_print_header_div {
4307         my ($action, $title, $hash, $hash_base) = @_;
4308         my %args = ();
4309
4310         $args{'action'} = $action;
4311         $args{'hash'} = $hash if $hash;
4312         $args{'hash_base'} = $hash_base if $hash_base;
4313
4314         print "<div class=\"header\">\n" .
4315               $cgi->a({-href => href(%args), -class => "title"},
4316               $title ? $title : $action) .
4317               "\n</div>\n";
4318 }
4319
4320 sub format_repo_url {
4321         my ($name, $url) = @_;
4322         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4323 }
4324
4325 # Group output by placing it in a DIV element and adding a header.
4326 # Options for start_div() can be provided by passing a hash reference as the
4327 # first parameter to the function.
4328 # Options to git_print_header_div() can be provided by passing an array
4329 # reference. This must follow the options to start_div if they are present.
4330 # The content can be a scalar, which is output as-is, a scalar reference, which
4331 # is output after html escaping, an IO handle passed either as *handle or
4332 # *handle{IO}, or a function reference. In the latter case all following
4333 # parameters will be taken as argument to the content function call.
4334 sub git_print_section {
4335         my ($div_args, $header_args, $content);
4336         my $arg = shift;
4337         if (ref($arg) eq 'HASH') {
4338                 $div_args = $arg;
4339                 $arg = shift;
4340         }
4341         if (ref($arg) eq 'ARRAY') {
4342                 $header_args = $arg;
4343                 $arg = shift;
4344         }
4345         $content = $arg;
4346
4347         print $cgi->start_div($div_args);
4348         git_print_header_div(@$header_args);
4349
4350         if (ref($content) eq 'CODE') {
4351                 $content->(@_);
4352         } elsif (ref($content) eq 'SCALAR') {
4353                 print esc_html($$content);
4354         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4355                 print <$content>;
4356         } elsif (!ref($content) && defined($content)) {
4357                 print $content;
4358         }
4359
4360         print $cgi->end_div;
4361 }
4362
4363 sub format_timestamp_html {
4364         my $date = shift;
4365         my $strtime = $date->{'rfc2822'};
4366
4367         my (undef, undef, $datetime_class) =
4368                 gitweb_get_feature('javascript-timezone');
4369         if ($datetime_class) {
4370                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4371         }
4372
4373         my $localtime_format = '(%02d:%02d %s)';
4374         if ($date->{'hour_local'} < 6) {
4375                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4376         }
4377         $strtime .= ' ' .
4378                     sprintf($localtime_format,
4379                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4380
4381         return $strtime;
4382 }
4383
4384 # Outputs the author name and date in long form
4385 sub git_print_authorship {
4386         my $co = shift;
4387         my %opts = @_;
4388         my $tag = $opts{-tag} || 'div';
4389         my $author = $co->{'author_name'};
4390
4391         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4392         print "<$tag class=\"author_date\">" .
4393               format_search_author($author, "author", esc_html($author)) .
4394               " [".format_timestamp_html(\%ad)."]".
4395               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4396               "</$tag>\n";
4397 }
4398
4399 # Outputs table rows containing the full author or committer information,
4400 # in the format expected for 'commit' view (& similar).
4401 # Parameters are a commit hash reference, followed by the list of people
4402 # to output information for. If the list is empty it defaults to both
4403 # author and committer.
4404 sub git_print_authorship_rows {
4405         my $co = shift;
4406         # too bad we can't use @people = @_ || ('author', 'committer')
4407         my @people = @_;
4408         @people = ('author', 'committer') unless @people;
4409         foreach my $who (@people) {
4410                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4411                 print "<tr><td>$who</td><td>" .
4412                       format_search_author($co->{"${who}_name"}, $who,
4413                                            esc_html($co->{"${who}_name"})) . " " .
4414                       format_search_author($co->{"${who}_email"}, $who,
4415                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4416                       "</td><td rowspan=\"2\">" .
4417                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4418                       "</td></tr>\n" .
4419                       "<tr>" .
4420                       "<td></td><td>" .
4421                       format_timestamp_html(\%wd) .
4422                       "</td>" .
4423                       "</tr>\n";
4424         }
4425 }
4426
4427 sub git_print_page_path {
4428         my $name = shift;
4429         my $type = shift;
4430         my $hb = shift;
4431
4432
4433         print "<div class=\"page_path\">";
4434         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4435                       -title => 'tree root'}, to_utf8("[$project]"));
4436         print " / ";
4437         if (defined $name) {
4438                 my @dirname = split '/', $name;
4439                 my $basename = pop @dirname;
4440                 my $fullname = '';
4441
4442                 foreach my $dir (@dirname) {
4443                         $fullname .= ($fullname ? '/' : '') . $dir;
4444                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4445                                                      hash_base=>$hb),
4446                                       -title => $fullname}, esc_path($dir));
4447                         print " / ";
4448                 }
4449                 if (defined $type && $type eq 'blob') {
4450                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4451                                                      hash_base=>$hb),
4452                                       -title => $name}, esc_path($basename));
4453                 } elsif (defined $type && $type eq 'tree') {
4454                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4455                                                      hash_base=>$hb),
4456                                       -title => $name}, esc_path($basename));
4457                         print " / ";
4458                 } else {
4459                         print esc_path($basename);
4460                 }
4461         }
4462         print "<br/></div>\n";
4463 }
4464
4465 sub git_print_log {
4466         my $log = shift;
4467         my %opts = @_;
4468
4469         if ($opts{'-remove_title'}) {
4470                 # remove title, i.e. first line of log
4471                 shift @$log;
4472         }
4473         # remove leading empty lines
4474         while (defined $log->[0] && $log->[0] eq "") {
4475                 shift @$log;
4476         }
4477
4478         # print log
4479         my $signoff = 0;
4480         my $empty = 0;
4481         foreach my $line (@$log) {
4482                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4483                         $signoff = 1;
4484                         $empty = 0;
4485                         if (! $opts{'-remove_signoff'}) {
4486                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4487                                 next;
4488                         } else {
4489                                 # remove signoff lines
4490                                 next;
4491                         }
4492                 } else {
4493                         $signoff = 0;
4494                 }
4495
4496                 # print only one empty line
4497                 # do not print empty line after signoff
4498                 if ($line eq "") {
4499                         next if ($empty || $signoff);
4500                         $empty = 1;
4501                 } else {
4502                         $empty = 0;
4503                 }
4504
4505                 print format_log_line_html($line) . "<br/>\n";
4506         }
4507
4508         if ($opts{'-final_empty_line'}) {
4509                 # end with single empty line
4510                 print "<br/>\n" unless $empty;
4511         }
4512 }
4513
4514 # return link target (what link points to)
4515 sub git_get_link_target {
4516         my $hash = shift;
4517         my $link_target;
4518
4519         # read link
4520         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4521                 or return;
4522         {
4523                 local $/ = undef;
4524                 $link_target = <$fd>;
4525         }
4526         close $fd
4527                 or return;
4528
4529         return $link_target;
4530 }
4531
4532 # given link target, and the directory (basedir) the link is in,
4533 # return target of link relative to top directory (top tree);
4534 # return undef if it is not possible (including absolute links).
4535 sub normalize_link_target {
4536         my ($link_target, $basedir) = @_;
4537
4538         # absolute symlinks (beginning with '/') cannot be normalized
4539         return if (substr($link_target, 0, 1) eq '/');
4540
4541         # normalize link target to path from top (root) tree (dir)
4542         my $path;
4543         if ($basedir) {
4544                 $path = $basedir . '/' . $link_target;
4545         } else {
4546                 # we are in top (root) tree (dir)
4547                 $path = $link_target;
4548         }
4549
4550         # remove //, /./, and /../
4551         my @path_parts;
4552         foreach my $part (split('/', $path)) {
4553                 # discard '.' and ''
4554                 next if (!$part || $part eq '.');
4555                 # handle '..'
4556                 if ($part eq '..') {
4557                         if (@path_parts) {
4558                                 pop @path_parts;
4559                         } else {
4560                                 # link leads outside repository (outside top dir)
4561                                 return;
4562                         }
4563                 } else {
4564                         push @path_parts, $part;
4565                 }
4566         }
4567         $path = join('/', @path_parts);
4568
4569         return $path;
4570 }
4571
4572 # print tree entry (row of git_tree), but without encompassing <tr> element
4573 sub git_print_tree_entry {
4574         my ($t, $basedir, $hash_base, $have_blame) = @_;
4575
4576         my %base_key = ();
4577         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4578
4579         # The format of a table row is: mode list link.  Where mode is
4580         # the mode of the entry, list is the name of the entry, an href,
4581         # and link is the action links of the entry.
4582
4583         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4584         if (exists $t->{'size'}) {
4585                 print "<td class=\"size\">$t->{'size'}</td>\n";
4586         }
4587         if ($t->{'type'} eq "blob") {
4588                 print "<td class=\"list\">" .
4589                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4590                                                file_name=>"$basedir$t->{'name'}", %base_key),
4591                                 -class => "list"}, esc_path($t->{'name'}));
4592                 if (S_ISLNK(oct $t->{'mode'})) {
4593                         my $link_target = git_get_link_target($t->{'hash'});
4594                         if ($link_target) {
4595                                 my $norm_target = normalize_link_target($link_target, $basedir);
4596                                 if (defined $norm_target) {
4597                                         print " -> " .
4598                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4599                                                                      file_name=>$norm_target),
4600                                                        -title => $norm_target}, esc_path($link_target));
4601                                 } else {
4602                                         print " -> " . esc_path($link_target);
4603                                 }
4604                         }
4605                 }
4606                 print "</td>\n";
4607                 print "<td class=\"link\">";
4608                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4609                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4610                               "blob");
4611                 if ($have_blame) {
4612                         print " | " .
4613                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4614                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4615                                       "blame");
4616                 }
4617                 if (defined $hash_base) {
4618                         print " | " .
4619                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4620                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4621                                       "history");
4622                 }
4623                 print " | " .
4624                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4625                                                file_name=>"$basedir$t->{'name'}")},
4626                                 "raw");
4627                 print "</td>\n";
4628
4629         } elsif ($t->{'type'} eq "tree") {
4630                 print "<td class=\"list\">";
4631                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4632                                              file_name=>"$basedir$t->{'name'}",
4633                                              %base_key)},
4634                               esc_path($t->{'name'}));
4635                 print "</td>\n";
4636                 print "<td class=\"link\">";
4637                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4638                                              file_name=>"$basedir$t->{'name'}",
4639                                              %base_key)},
4640                               "tree");
4641                 if (defined $hash_base) {
4642                         print " | " .
4643                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4644                                                      file_name=>"$basedir$t->{'name'}")},
4645                                       "history");
4646                 }
4647                 print "</td>\n";
4648         } else {
4649                 # unknown object: we can only present history for it
4650                 # (this includes 'commit' object, i.e. submodule support)
4651                 print "<td class=\"list\">" .
4652                       esc_path($t->{'name'}) .
4653                       "</td>\n";
4654                 print "<td class=\"link\">";
4655                 if (defined $hash_base) {
4656                         print $cgi->a({-href => href(action=>"history",
4657                                                      hash_base=>$hash_base,
4658                                                      file_name=>"$basedir$t->{'name'}")},
4659                                       "history");
4660                 }
4661                 print "</td>\n";
4662         }
4663 }
4664
4665 ## ......................................................................
4666 ## functions printing large fragments of HTML
4667
4668 # get pre-image filenames for merge (combined) diff
4669 sub fill_from_file_info {
4670         my ($diff, @parents) = @_;
4671
4672         $diff->{'from_file'} = [ ];
4673         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4674         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4675                 if ($diff->{'status'}[$i] eq 'R' ||
4676                     $diff->{'status'}[$i] eq 'C') {
4677                         $diff->{'from_file'}[$i] =
4678                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4679                 }
4680         }
4681
4682         return $diff;
4683 }
4684
4685 # is current raw difftree line of file deletion
4686 sub is_deleted {
4687         my $diffinfo = shift;
4688
4689         return $diffinfo->{'to_id'} eq ('0' x 40);
4690 }
4691
4692 # does patch correspond to [previous] difftree raw line
4693 # $diffinfo  - hashref of parsed raw diff format
4694 # $patchinfo - hashref of parsed patch diff format
4695 #              (the same keys as in $diffinfo)
4696 sub is_patch_split {
4697         my ($diffinfo, $patchinfo) = @_;
4698
4699         return defined $diffinfo && defined $patchinfo
4700                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4701 }
4702
4703
4704 sub git_difftree_body {
4705         my ($difftree, $hash, @parents) = @_;
4706         my ($parent) = $parents[0];
4707         my $have_blame = gitweb_check_feature('blame');
4708         print "<div class=\"list_head\">\n";
4709         if ($#{$difftree} > 10) {
4710                 print(($#{$difftree} + 1) . " files changed:\n");
4711         }
4712         print "</div>\n";
4713
4714         print "<table class=\"" .
4715               (@parents > 1 ? "combined " : "") .
4716               "diff_tree\">\n";
4717
4718         # header only for combined diff in 'commitdiff' view
4719         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4720         if ($has_header) {
4721                 # table header
4722                 print "<thead><tr>\n" .
4723                        "<th></th><th></th>\n"; # filename, patchN link
4724                 for (my $i = 0; $i < @parents; $i++) {
4725                         my $par = $parents[$i];
4726                         print "<th>" .
4727                               $cgi->a({-href => href(action=>"commitdiff",
4728                                                      hash=>$hash, hash_parent=>$par),
4729                                        -title => 'commitdiff to parent number ' .
4730                                                   ($i+1) . ': ' . substr($par,0,7)},
4731                                       $i+1) .
4732                               "&nbsp;</th>\n";
4733                 }
4734                 print "</tr></thead>\n<tbody>\n";
4735         }
4736
4737         my $alternate = 1;
4738         my $patchno = 0;
4739         foreach my $line (@{$difftree}) {
4740                 my $diff = parsed_difftree_line($line);
4741
4742                 if ($alternate) {
4743                         print "<tr class=\"dark\">\n";
4744                 } else {
4745                         print "<tr class=\"light\">\n";
4746                 }
4747                 $alternate ^= 1;
4748
4749                 if (exists $diff->{'nparents'}) { # combined diff
4750
4751                         fill_from_file_info($diff, @parents)
4752                                 unless exists $diff->{'from_file'};
4753
4754                         if (!is_deleted($diff)) {
4755                                 # file exists in the result (child) commit
4756                                 print "<td>" .
4757                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4758                                                              file_name=>$diff->{'to_file'},
4759                                                              hash_base=>$hash),
4760                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4761                                       "</td>\n";
4762                         } else {
4763                                 print "<td>" .
4764                                       esc_path($diff->{'to_file'}) .
4765                                       "</td>\n";
4766                         }
4767
4768                         if ($action eq 'commitdiff') {
4769                                 # link to patch
4770                                 $patchno++;
4771                                 print "<td class=\"link\">" .
4772                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4773                                               "patch") .
4774                                       " | " .
4775                                       "</td>\n";
4776                         }
4777
4778                         my $has_history = 0;
4779                         my $not_deleted = 0;
4780                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4781                                 my $hash_parent = $parents[$i];
4782                                 my $from_hash = $diff->{'from_id'}[$i];
4783                                 my $from_path = $diff->{'from_file'}[$i];
4784                                 my $status = $diff->{'status'}[$i];
4785
4786                                 $has_history ||= ($status ne 'A');
4787                                 $not_deleted ||= ($status ne 'D');
4788
4789                                 if ($status eq 'A') {
4790                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4791                                 } elsif ($status eq 'D') {
4792                                         print "<td class=\"link\">" .
4793                                               $cgi->a({-href => href(action=>"blob",
4794                                                                      hash_base=>$hash,
4795                                                                      hash=>$from_hash,
4796                                                                      file_name=>$from_path)},
4797                                                       "blob" . ($i+1)) .
4798                                               " | </td>\n";
4799                                 } else {
4800                                         if ($diff->{'to_id'} eq $from_hash) {
4801                                                 print "<td class=\"link nochange\">";
4802                                         } else {
4803                                                 print "<td class=\"link\">";
4804                                         }
4805                                         print $cgi->a({-href => href(action=>"blobdiff",
4806                                                                      hash=>$diff->{'to_id'},
4807                                                                      hash_parent=>$from_hash,
4808                                                                      hash_base=>$hash,
4809                                                                      hash_parent_base=>$hash_parent,
4810                                                                      file_name=>$diff->{'to_file'},
4811                                                                      file_parent=>$from_path)},
4812                                                       "diff" . ($i+1)) .
4813                                               " | </td>\n";
4814                                 }
4815                         }
4816
4817                         print "<td class=\"link\">";
4818                         if ($not_deleted) {
4819                                 print $cgi->a({-href => href(action=>"blob",
4820                                                              hash=>$diff->{'to_id'},
4821                                                              file_name=>$diff->{'to_file'},
4822                                                              hash_base=>$hash)},
4823                                               "blob");
4824                                 print " | " if ($has_history);
4825                         }
4826                         if ($has_history) {
4827                                 print $cgi->a({-href => href(action=>"history",
4828                                                              file_name=>$diff->{'to_file'},
4829                                                              hash_base=>$hash)},
4830                                               "history");
4831                         }
4832                         print "</td>\n";
4833
4834                         print "</tr>\n";
4835                         next; # instead of 'else' clause, to avoid extra indent
4836                 }
4837                 # else ordinary diff
4838
4839                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4840                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4841                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4842                         $to_mode_oct = oct $diff->{'to_mode'};
4843                         if (S_ISREG($to_mode_oct)) { # only for regular file
4844                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4845                         }
4846                         $to_file_type = file_type($diff->{'to_mode'});
4847                 }
4848                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4849                         $from_mode_oct = oct $diff->{'from_mode'};
4850                         if (S_ISREG($from_mode_oct)) { # only for regular file
4851                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4852                         }
4853                         $from_file_type = file_type($diff->{'from_mode'});
4854                 }
4855
4856                 if ($diff->{'status'} eq "A") { # created
4857                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4858                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4859                         $mode_chng   .= "]</span>";
4860                         print "<td>";
4861                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4862                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4863                                       -class => "list"}, esc_path($diff->{'file'}));
4864                         print "</td>\n";
4865                         print "<td>$mode_chng</td>\n";
4866                         print "<td class=\"link\">";
4867                         if ($action eq 'commitdiff') {
4868                                 # link to patch
4869                                 $patchno++;
4870                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4871                                               "patch") .
4872                                       " | ";
4873                         }
4874                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4875                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4876                                       "blob");
4877                         print "</td>\n";
4878
4879                 } elsif ($diff->{'status'} eq "D") { # deleted
4880                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4881                         print "<td>";
4882                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4883                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4884                                        -class => "list"}, esc_path($diff->{'file'}));
4885                         print "</td>\n";
4886                         print "<td>$mode_chng</td>\n";
4887                         print "<td class=\"link\">";
4888                         if ($action eq 'commitdiff') {
4889                                 # link to patch
4890                                 $patchno++;
4891                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4892                                               "patch") .
4893                                       " | ";
4894                         }
4895                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4896                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4897                                       "blob") . " | ";
4898                         if ($have_blame) {
4899                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4900                                                              file_name=>$diff->{'file'})},
4901                                               "blame") . " | ";
4902                         }
4903                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4904                                                      file_name=>$diff->{'file'})},
4905                                       "history");
4906                         print "</td>\n";
4907
4908                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4909                         my $mode_chnge = "";
4910                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4911                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4912                                 if ($from_file_type ne $to_file_type) {
4913                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4914                                 }
4915                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4916                                         if ($from_mode_str && $to_mode_str) {
4917                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4918                                         } elsif ($to_mode_str) {
4919                                                 $mode_chnge .= " mode: $to_mode_str";
4920                                         }
4921                                 }
4922                                 $mode_chnge .= "]</span>\n";
4923                         }
4924                         print "<td>";
4925                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4926                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4927                                       -class => "list"}, esc_path($diff->{'file'}));
4928                         print "</td>\n";
4929                         print "<td>$mode_chnge</td>\n";
4930                         print "<td class=\"link\">";
4931                         if ($action eq 'commitdiff') {
4932                                 # link to patch
4933                                 $patchno++;
4934                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4935                                               "patch") .
4936                                       " | ";
4937                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4938                                 # "commit" view and modified file (not onlu mode changed)
4939                                 print $cgi->a({-href => href(action=>"blobdiff",
4940                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4941                                                              hash_base=>$hash, hash_parent_base=>$parent,
4942                                                              file_name=>$diff->{'file'})},
4943                                               "diff") .
4944                                       " | ";
4945                         }
4946                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4947                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4948                                        "blob") . " | ";
4949                         if ($have_blame) {
4950                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4951                                                              file_name=>$diff->{'file'})},
4952                                               "blame") . " | ";
4953                         }
4954                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4955                                                      file_name=>$diff->{'file'})},
4956                                       "history");
4957                         print "</td>\n";
4958
4959                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4960                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4961                         my $nstatus = $status_name{$diff->{'status'}};
4962                         my $mode_chng = "";
4963                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4964                                 # mode also for directories, so we cannot use $to_mode_str
4965                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4966                         }
4967                         print "<td>" .
4968                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4969                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4970                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4971                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4972                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4973                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4974                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4975                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4976                               "<td class=\"link\">";
4977                         if ($action eq 'commitdiff') {
4978                                 # link to patch
4979                                 $patchno++;
4980                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4981                                               "patch") .
4982                                       " | ";
4983                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4984                                 # "commit" view and modified file (not only pure rename or copy)
4985                                 print $cgi->a({-href => href(action=>"blobdiff",
4986                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4987                                                              hash_base=>$hash, hash_parent_base=>$parent,
4988                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4989                                               "diff") .
4990                                       " | ";
4991                         }
4992                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4993                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4994                                       "blob") . " | ";
4995                         if ($have_blame) {
4996                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4997                                                              file_name=>$diff->{'to_file'})},
4998                                               "blame") . " | ";
4999                         }
5000                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5001                                                     file_name=>$diff->{'to_file'})},
5002                                       "history");
5003                         print "</td>\n";
5004
5005                 } # we should not encounter Unmerged (U) or Unknown (X) status
5006                 print "</tr>\n";
5007         }
5008         print "</tbody>" if $has_header;
5009         print "</table>\n";
5010 }
5011
5012 # Print context lines and then rem/add lines in a side-by-side manner.
5013 sub print_sidebyside_diff_lines {
5014         my ($ctx, $rem, $add) = @_;
5015
5016         # print context block before add/rem block
5017         if (@$ctx) {
5018                 print join '',
5019                         '<div class="chunk_block ctx">',
5020                                 '<div class="old">',
5021                                 @$ctx,
5022                                 '</div>',
5023                                 '<div class="new">',
5024                                 @$ctx,
5025                                 '</div>',
5026                         '</div>';
5027         }
5028
5029         if (!@$add) {
5030                 # pure removal
5031                 print join '',
5032                         '<div class="chunk_block rem">',
5033                                 '<div class="old">',
5034                                 @$rem,
5035                                 '</div>',
5036                         '</div>';
5037         } elsif (!@$rem) {
5038                 # pure addition
5039                 print join '',
5040                         '<div class="chunk_block add">',
5041                                 '<div class="new">',
5042                                 @$add,
5043                                 '</div>',
5044                         '</div>';
5045         } else {
5046                 print join '',
5047                         '<div class="chunk_block chg">',
5048                                 '<div class="old">',
5049                                 @$rem,
5050                                 '</div>',
5051                                 '<div class="new">',
5052                                 @$add,
5053                                 '</div>',
5054                         '</div>';
5055         }
5056 }
5057
5058 # Print context lines and then rem/add lines in inline manner.
5059 sub print_inline_diff_lines {
5060         my ($ctx, $rem, $add) = @_;
5061
5062         print @$ctx, @$rem, @$add;
5063 }
5064
5065 # Format removed and added line, mark changed part and HTML-format them.
5066 # Implementation is based on contrib/diff-highlight
5067 sub format_rem_add_lines_pair {
5068         my ($rem, $add, $num_parents) = @_;
5069
5070         # We need to untabify lines before split()'ing them;
5071         # otherwise offsets would be invalid.
5072         chomp $rem;
5073         chomp $add;
5074         $rem = untabify($rem);
5075         $add = untabify($add);
5076
5077         my @rem = split(//, $rem);
5078         my @add = split(//, $add);
5079         my ($esc_rem, $esc_add);
5080         # Ignore leading +/- characters for each parent.
5081         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5082         my ($prefix_has_nonspace, $suffix_has_nonspace);
5083
5084         my $shorter = (@rem < @add) ? @rem : @add;
5085         while ($prefix_len < $shorter) {
5086                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5087
5088                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5089                 $prefix_len++;
5090         }
5091
5092         while ($prefix_len + $suffix_len < $shorter) {
5093                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5094
5095                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5096                 $suffix_len++;
5097         }
5098
5099         # Mark lines that are different from each other, but have some common
5100         # part that isn't whitespace.  If lines are completely different, don't
5101         # mark them because that would make output unreadable, especially if
5102         # diff consists of multiple lines.
5103         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5104                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5105                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5106                 $esc_add = esc_html_hl_regions($add, 'marked',
5107                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5108         } else {
5109                 $esc_rem = esc_html($rem, -nbsp=>1);
5110                 $esc_add = esc_html($add, -nbsp=>1);
5111         }
5112
5113         return format_diff_line(\$esc_rem, 'rem'),
5114                format_diff_line(\$esc_add, 'add');
5115 }
5116
5117 # HTML-format diff context, removed and added lines.
5118 sub format_ctx_rem_add_lines {
5119         my ($ctx, $rem, $add, $num_parents) = @_;
5120         my (@new_ctx, @new_rem, @new_add);
5121         my $can_highlight = 0;
5122         my $is_combined = ($num_parents > 1);
5123
5124         # Highlight if every removed line has a corresponding added line.
5125         if (@$add > 0 && @$add == @$rem) {
5126                 $can_highlight = 1;
5127
5128                 # Highlight lines in combined diff only if the chunk contains
5129                 # diff between the same version, e.g.
5130                 #
5131                 #    - a
5132                 #   -  b
5133                 #    + c
5134                 #   +  d
5135                 #
5136                 # Otherwise the highlightling would be confusing.
5137                 if ($is_combined) {
5138                         for (my $i = 0; $i < @$add; $i++) {
5139                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5140                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5141
5142                                 $prefix_rem =~ s/-/+/g;
5143
5144                                 if ($prefix_rem ne $prefix_add) {
5145                                         $can_highlight = 0;
5146                                         last;
5147                                 }
5148                         }
5149                 }
5150         }
5151
5152         if ($can_highlight) {
5153                 for (my $i = 0; $i < @$add; $i++) {
5154                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5155                                 $rem->[$i], $add->[$i], $num_parents);
5156                         push @new_rem, $line_rem;
5157                         push @new_add, $line_add;
5158                 }
5159         } else {
5160                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5161                 @new_add = map { format_diff_line($_, 'add') } @$add;
5162         }
5163
5164         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5165
5166         return (\@new_ctx, \@new_rem, \@new_add);
5167 }
5168
5169 # Print context lines and then rem/add lines.
5170 sub print_diff_lines {
5171         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5172         my $is_combined = $num_parents > 1;
5173
5174         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5175                 $num_parents);
5176
5177         if ($diff_style eq 'sidebyside' && !$is_combined) {
5178                 print_sidebyside_diff_lines($ctx, $rem, $add);
5179         } else {
5180                 # default 'inline' style and unknown styles
5181                 print_inline_diff_lines($ctx, $rem, $add);
5182         }
5183 }
5184
5185 sub print_diff_chunk {
5186         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5187         my (@ctx, @rem, @add);
5188
5189         # The class of the previous line.
5190         my $prev_class = '';
5191
5192         return unless @chunk;
5193
5194         # incomplete last line might be among removed or added lines,
5195         # or both, or among context lines: find which
5196         for (my $i = 1; $i < @chunk; $i++) {
5197                 if ($chunk[$i][0] eq 'incomplete') {
5198                         $chunk[$i][0] = $chunk[$i-1][0];
5199                 }
5200         }
5201
5202         # guardian
5203         push @chunk, ["", ""];
5204
5205         foreach my $line_info (@chunk) {
5206                 my ($class, $line) = @$line_info;
5207
5208                 # print chunk headers
5209                 if ($class && $class eq 'chunk_header') {
5210                         print format_diff_line($line, $class, $from, $to);
5211                         next;
5212                 }
5213
5214                 ## print from accumulator when have some add/rem lines or end
5215                 # of chunk (flush context lines), or when have add and rem
5216                 # lines and new block is reached (otherwise add/rem lines could
5217                 # be reordered)
5218                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5219                     (@rem && @add && $class ne $prev_class)) {
5220                         print_diff_lines(\@ctx, \@rem, \@add,
5221                                          $diff_style, $num_parents);
5222                         @ctx = @rem = @add = ();
5223                 }
5224
5225                 ## adding lines to accumulator
5226                 # guardian value
5227                 last unless $line;
5228                 # rem, add or change
5229                 if ($class eq 'rem') {
5230                         push @rem, $line;
5231                 } elsif ($class eq 'add') {
5232                         push @add, $line;
5233                 }
5234                 # context line
5235                 if ($class eq 'ctx') {
5236                         push @ctx, $line;
5237                 }
5238
5239                 $prev_class = $class;
5240         }
5241 }
5242
5243 sub git_patchset_body {
5244         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5245         my ($hash_parent) = $hash_parents[0];
5246
5247         my $is_combined = (@hash_parents > 1);
5248         my $patch_idx = 0;
5249         my $patch_number = 0;
5250         my $patch_line;
5251         my $diffinfo;
5252         my $to_name;
5253         my (%from, %to);
5254         my @chunk; # for side-by-side diff
5255
5256         print "<div class=\"patchset\">\n";
5257
5258         # skip to first patch
5259         while ($patch_line = <$fd>) {
5260                 chomp $patch_line;
5261
5262                 last if ($patch_line =~ m/^diff /);
5263         }
5264
5265  PATCH:
5266         while ($patch_line) {
5267
5268                 # parse "git diff" header line
5269                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5270                         # $1 is from_name, which we do not use
5271                         $to_name = unquote($2);
5272                         $to_name =~ s!^b/!!;
5273                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5274                         # $1 is 'cc' or 'combined', which we do not use
5275                         $to_name = unquote($2);
5276                 } else {
5277                         $to_name = undef;
5278                 }
5279
5280                 # check if current patch belong to current raw line
5281                 # and parse raw git-diff line if needed
5282                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5283                         # this is continuation of a split patch
5284                         print "<div class=\"patch cont\">\n";
5285                 } else {
5286                         # advance raw git-diff output if needed
5287                         $patch_idx++ if defined $diffinfo;
5288
5289                         # read and prepare patch information
5290                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5291
5292                         # compact combined diff output can have some patches skipped
5293                         # find which patch (using pathname of result) we are at now;
5294                         if ($is_combined) {
5295                                 while ($to_name ne $diffinfo->{'to_file'}) {
5296                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5297                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5298                                               "</div>\n";  # class="patch"
5299
5300                                         $patch_idx++;
5301                                         $patch_number++;
5302
5303                                         last if $patch_idx > $#$difftree;
5304                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5305                                 }
5306                         }
5307
5308                         # modifies %from, %to hashes
5309                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5310
5311                         # this is first patch for raw difftree line with $patch_idx index
5312                         # we index @$difftree array from 0, but number patches from 1
5313                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5314                 }
5315
5316                 # git diff header
5317                 #assert($patch_line =~ m/^diff /) if DEBUG;
5318                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5319                 $patch_number++;
5320                 # print "git diff" header
5321                 print format_git_diff_header_line($patch_line, $diffinfo,
5322                                                   \%from, \%to);
5323
5324                 # print extended diff header
5325                 print "<div class=\"diff extended_header\">\n";
5326         EXTENDED_HEADER:
5327                 while ($patch_line = <$fd>) {
5328                         chomp $patch_line;
5329
5330                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5331
5332                         print format_extended_diff_header_line($patch_line, $diffinfo,
5333                                                                \%from, \%to);
5334                 }
5335                 print "</div>\n"; # class="diff extended_header"
5336
5337                 # from-file/to-file diff header
5338                 if (! $patch_line) {
5339                         print "</div>\n"; # class="patch"
5340                         last PATCH;
5341                 }
5342                 next PATCH if ($patch_line =~ m/^diff /);
5343                 #assert($patch_line =~ m/^---/) if DEBUG;
5344
5345                 my $last_patch_line = $patch_line;
5346                 $patch_line = <$fd>;
5347                 chomp $patch_line;
5348                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5349
5350                 print format_diff_from_to_header($last_patch_line, $patch_line,
5351                                                  $diffinfo, \%from, \%to,
5352                                                  @hash_parents);
5353
5354                 # the patch itself
5355         LINE:
5356                 while ($patch_line = <$fd>) {
5357                         chomp $patch_line;
5358
5359                         next PATCH if ($patch_line =~ m/^diff /);
5360
5361                         my $class = diff_line_class($patch_line, \%from, \%to);
5362
5363                         if ($class eq 'chunk_header') {
5364                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5365                                 @chunk = ();
5366                         }
5367
5368                         push @chunk, [ $class, $patch_line ];
5369                 }
5370
5371         } continue {
5372                 if (@chunk) {
5373                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5374                         @chunk = ();
5375                 }
5376                 print "</div>\n"; # class="patch"
5377         }
5378
5379         # for compact combined (--cc) format, with chunk and patch simplification
5380         # the patchset might be empty, but there might be unprocessed raw lines
5381         for (++$patch_idx if $patch_number > 0;
5382              $patch_idx < @$difftree;
5383              ++$patch_idx) {
5384                 # read and prepare patch information
5385                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5386
5387                 # generate anchor for "patch" links in difftree / whatchanged part
5388                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5389                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5390                       "</div>\n";  # class="patch"
5391
5392                 $patch_number++;
5393         }
5394
5395         if ($patch_number == 0) {
5396                 if (@hash_parents > 1) {
5397                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5398                 } else {
5399                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5400                 }
5401         }
5402
5403         print "</div>\n"; # class="patchset"
5404 }
5405
5406 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5407
5408 sub git_project_search_form {
5409         my ($searchtext, $search_use_regexp) = @_;
5410
5411         my $limit = '';
5412         if ($project_filter) {
5413                 $limit = " in '$project_filter/'";
5414         }
5415
5416         print "<div class=\"projsearch\">\n";
5417         print $cgi->startform(-method => 'get', -action => $my_uri) .
5418               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5419         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5420                 if (defined $project_filter);
5421         print $cgi->textfield(-name => 's', -value => $searchtext,
5422                               -title => "Search project by name and description$limit",
5423                               -size => 60) . "\n" .
5424               "<span title=\"Extended regular expression\">" .
5425               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5426                              -checked => $search_use_regexp) .
5427               "</span>\n" .
5428               $cgi->submit(-name => 'btnS', -value => 'Search') .
5429               $cgi->end_form() . "\n" .
5430               $cgi->a({-href => href(project => undef, searchtext => undef,
5431                                      project_filter => $project_filter)},
5432                       esc_html("List all projects$limit")) . "<br />\n";
5433         print "</div>\n";
5434 }
5435
5436 # entry for given @keys needs filling if at least one of keys in list
5437 # is not present in %$project_info
5438 sub project_info_needs_filling {
5439         my ($project_info, @keys) = @_;
5440
5441         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5442         foreach my $key (@keys) {
5443                 if (!exists $project_info->{$key}) {
5444                         return 1;
5445                 }
5446         }
5447         return;
5448 }
5449
5450 # fills project list info (age, description, owner, category, forks, etc.)
5451 # for each project in the list, removing invalid projects from
5452 # returned list, or fill only specified info.
5453 #
5454 # Invalid projects are removed from the returned list if and only if you
5455 # ask 'age' or 'age_string' to be filled, because they are the only fields
5456 # that run unconditionally git command that requires repository, and
5457 # therefore do always check if project repository is invalid.
5458 #
5459 # USAGE:
5460 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5461 #   ensures that 'descr_long' and 'ctags' fields are filled
5462 # * @project_list = fill_project_list_info(\@project_list)
5463 #   ensures that all fields are filled (and invalid projects removed)
5464 #
5465 # NOTE: modifies $projlist, but does not remove entries from it
5466 sub fill_project_list_info {
5467         my ($projlist, @wanted_keys) = @_;
5468         my @projects;
5469         my $filter_set = sub { return @_; };
5470         if (@wanted_keys) {
5471                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5472                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5473         }
5474
5475         my $show_ctags = gitweb_check_feature('ctags');
5476  PROJECT:
5477         foreach my $pr (@$projlist) {
5478                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5479                         my (@activity) = git_get_last_activity($pr->{'path'});
5480                         unless (@activity) {
5481                                 next PROJECT;
5482                         }
5483                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5484                 }
5485                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5486                         my $descr = git_get_project_description($pr->{'path'}) || "";
5487                         $descr = to_utf8($descr);
5488                         $pr->{'descr_long'} = $descr;
5489                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5490                 }
5491                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5492                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5493                 }
5494                 if ($show_ctags &&
5495                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5496                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5497                 }
5498                 if ($projects_list_group_categories &&
5499                     project_info_needs_filling($pr, $filter_set->('category'))) {
5500                         my $cat = git_get_project_category($pr->{'path'}) ||
5501                                                            $project_list_default_category;
5502                         $pr->{'category'} = to_utf8($cat);
5503                 }
5504
5505                 push @projects, $pr;
5506         }
5507
5508         return @projects;
5509 }
5510
5511 sub sort_projects_list {
5512         my ($projlist, $order) = @_;
5513         my @projects;
5514
5515         my %order_info = (
5516                 project => { key => 'path', type => 'str' },
5517                 descr => { key => 'descr_long', type => 'str' },
5518                 owner => { key => 'owner', type => 'str' },
5519                 age => { key => 'age', type => 'num' }
5520         );
5521         my $oi = $order_info{$order};
5522         return @$projlist unless defined $oi;
5523         if ($oi->{'type'} eq 'str') {
5524                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5525         } else {
5526                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5527         }
5528
5529         return @projects;
5530 }
5531
5532 # returns a hash of categories, containing the list of project
5533 # belonging to each category
5534 sub build_projlist_by_category {
5535         my ($projlist, $from, $to) = @_;
5536         my %categories;
5537
5538         $from = 0 unless defined $from;
5539         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5540
5541         for (my $i = $from; $i <= $to; $i++) {
5542                 my $pr = $projlist->[$i];
5543                 push @{$categories{ $pr->{'category'} }}, $pr;
5544         }
5545
5546         return wantarray ? %categories : \%categories;
5547 }
5548
5549 # print 'sort by' <th> element, generating 'sort by $name' replay link
5550 # if that order is not selected
5551 sub print_sort_th {
5552         print format_sort_th(@_);
5553 }
5554
5555 sub format_sort_th {
5556         my ($name, $order, $header) = @_;
5557         my $sort_th = "";
5558         $header ||= ucfirst($name);
5559
5560         if ($order eq $name) {
5561                 $sort_th .= "<th>$header</th>\n";
5562         } else {
5563                 $sort_th .= "<th>" .
5564                             $cgi->a({-href => href(-replay=>1, order=>$name),
5565                                      -class => "header"}, $header) .
5566                             "</th>\n";
5567         }
5568
5569         return $sort_th;
5570 }
5571
5572 sub git_project_list_rows {
5573         my ($projlist, $from, $to, $check_forks) = @_;
5574
5575         $from = 0 unless defined $from;
5576         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5577
5578         my $alternate = 1;
5579         for (my $i = $from; $i <= $to; $i++) {
5580                 my $pr = $projlist->[$i];
5581
5582                 if ($alternate) {
5583                         print "<tr class=\"dark\">\n";
5584                 } else {
5585                         print "<tr class=\"light\">\n";
5586                 }
5587                 $alternate ^= 1;
5588
5589                 if ($check_forks) {
5590                         print "<td>";
5591                         if ($pr->{'forks'}) {
5592                                 my $nforks = scalar @{$pr->{'forks'}};
5593                                 if ($nforks > 0) {
5594                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5595                                                        -title => "$nforks forks"}, "+");
5596                                 } else {
5597                                         print $cgi->span({-title => "$nforks forks"}, "+");
5598                                 }
5599                         }
5600                         print "</td>\n";
5601                 }
5602                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5603                                         -class => "list"},
5604                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5605                       "</td>\n" .
5606                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5607                                         -class => "list",
5608                                         -title => $pr->{'descr_long'}},
5609                                         $search_regexp
5610                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5611                                                                     $pr->{'descr'}, $search_regexp)
5612                                         : esc_html($pr->{'descr'})) .
5613                       "</td>\n" .
5614                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5615                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5616                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5617                       "<td class=\"link\">" .
5618                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5619                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5620                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5621                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5622                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5623                       "</td>\n" .
5624                       "</tr>\n";
5625         }
5626 }
5627
5628 sub git_project_list_body {
5629         # actually uses global variable $project
5630         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5631         my @projects = @$projlist;
5632
5633         my $check_forks = gitweb_check_feature('forks');
5634         my $show_ctags  = gitweb_check_feature('ctags');
5635         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5636         $check_forks = undef
5637                 if ($tagfilter || $search_regexp);
5638
5639         # filtering out forks before filling info allows to do less work
5640         @projects = filter_forks_from_projects_list(\@projects)
5641                 if ($check_forks);
5642         # search_projects_list pre-fills required info
5643         @projects = search_projects_list(\@projects,
5644                                          'search_regexp' => $search_regexp,
5645                                          'tagfilter'  => $tagfilter)
5646                 if ($tagfilter || $search_regexp);
5647         # fill the rest
5648         @projects = fill_project_list_info(\@projects);
5649
5650         $order ||= $default_projects_order;
5651         $from = 0 unless defined $from;
5652         $to = $#projects if (!defined $to || $#projects < $to);
5653
5654         # short circuit
5655         if ($from > $to) {
5656                 print "<center>\n".
5657                       "<b>No such projects found</b><br />\n".
5658                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5659                       "</center>\n<br />\n";
5660                 return;
5661         }
5662
5663         @projects = sort_projects_list(\@projects, $order);
5664
5665         if ($show_ctags) {
5666                 my $ctags = git_gather_all_ctags(\@projects);
5667                 my $cloud = git_populate_project_tagcloud($ctags);
5668                 print git_show_project_tagcloud($cloud, 64);
5669         }
5670
5671         print "<table class=\"project_list\">\n";
5672         unless ($no_header) {
5673                 print "<tr>\n";
5674                 if ($check_forks) {
5675                         print "<th></th>\n";
5676                 }
5677                 print_sort_th('project', $order, 'Project');
5678                 print_sort_th('descr', $order, 'Description');
5679                 print_sort_th('owner', $order, 'Owner');
5680                 print_sort_th('age', $order, 'Last Change');
5681                 print "<th></th>\n" . # for links
5682                       "</tr>\n";
5683         }
5684
5685         if ($projects_list_group_categories) {
5686                 # only display categories with projects in the $from-$to window
5687                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5688                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5689                 foreach my $cat (sort keys %categories) {
5690                         unless ($cat eq "") {
5691                                 print "<tr>\n";
5692                                 if ($check_forks) {
5693                                         print "<td></td>\n";
5694                                 }
5695                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5696                                 print "</tr>\n";
5697                         }
5698
5699                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5700                 }
5701         } else {
5702                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5703         }
5704
5705         if (defined $extra) {
5706                 print "<tr>\n";
5707                 if ($check_forks) {
5708                         print "<td></td>\n";
5709                 }
5710                 print "<td colspan=\"5\">$extra</td>\n" .
5711                       "</tr>\n";
5712         }
5713         print "</table>\n";
5714 }
5715
5716 sub git_log_body {
5717         # uses global variable $project
5718         my ($commitlist, $from, $to, $refs, $extra) = @_;
5719
5720         $from = 0 unless defined $from;
5721         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5722
5723         for (my $i = 0; $i <= $to; $i++) {
5724                 my %co = %{$commitlist->[$i]};
5725                 next if !%co;
5726                 my $commit = $co{'id'};
5727                 my $ref = format_ref_marker($refs, $commit);
5728                 git_print_header_div('commit',
5729                                "<span class=\"age\">$co{'age_string'}</span>" .
5730                                esc_html($co{'title'}) . $ref,
5731                                $commit);
5732                 print "<div class=\"title_text\">\n" .
5733                       "<div class=\"log_link\">\n" .
5734                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5735                       " | " .
5736                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5737                       " | " .
5738                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5739                       "<br/>\n" .
5740                       "</div>\n";
5741                       git_print_authorship(\%co, -tag => 'span');
5742                       print "<br/>\n</div>\n";
5743
5744                 print "<div class=\"log_body\">\n";
5745                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5746                 print "</div>\n";
5747         }
5748         if ($extra) {
5749                 print "<div class=\"page_nav\">\n";
5750                 print "$extra\n";
5751                 print "</div>\n";
5752         }
5753 }
5754
5755 sub git_shortlog_body {
5756         # uses global variable $project
5757         my ($commitlist, $from, $to, $refs, $extra) = @_;
5758
5759         $from = 0 unless defined $from;
5760         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5761
5762         print "<table class=\"shortlog\">\n";
5763         my $alternate = 1;
5764         for (my $i = $from; $i <= $to; $i++) {
5765                 my %co = %{$commitlist->[$i]};
5766                 my $commit = $co{'id'};
5767                 my $ref = format_ref_marker($refs, $commit);
5768                 if ($alternate) {
5769                         print "<tr class=\"dark\">\n";
5770                 } else {
5771                         print "<tr class=\"light\">\n";
5772                 }
5773                 $alternate ^= 1;
5774                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5775                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5776                       format_author_html('td', \%co, 10) . "<td>";
5777                 print format_subject_html($co{'title'}, $co{'title_short'},
5778                                           href(action=>"commit", hash=>$commit), $ref);
5779                 print "</td>\n" .
5780                       "<td class=\"link\">" .
5781                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5782                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5783                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5784                 my $snapshot_links = format_snapshot_links($commit);
5785                 if (defined $snapshot_links) {
5786                         print " | " . $snapshot_links;
5787                 }
5788                 print "</td>\n" .
5789                       "</tr>\n";
5790         }
5791         if (defined $extra) {
5792                 print "<tr>\n" .
5793                       "<td colspan=\"4\">$extra</td>\n" .
5794                       "</tr>\n";
5795         }
5796         print "</table>\n";
5797 }
5798
5799 sub git_history_body {
5800         # Warning: assumes constant type (blob or tree) during history
5801         my ($commitlist, $from, $to, $refs, $extra,
5802             $file_name, $file_hash, $ftype) = @_;
5803
5804         $from = 0 unless defined $from;
5805         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5806
5807         print "<table class=\"history\">\n";
5808         my $alternate = 1;
5809         for (my $i = $from; $i <= $to; $i++) {
5810                 my %co = %{$commitlist->[$i]};
5811                 if (!%co) {
5812                         next;
5813                 }
5814                 my $commit = $co{'id'};
5815
5816                 my $ref = format_ref_marker($refs, $commit);
5817
5818                 if ($alternate) {
5819                         print "<tr class=\"dark\">\n";
5820                 } else {
5821                         print "<tr class=\"light\">\n";
5822                 }
5823                 $alternate ^= 1;
5824                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5825         # shortlog:   format_author_html('td', \%co, 10)
5826                       format_author_html('td', \%co, 15, 3) . "<td>";
5827                 # originally git_history used chop_str($co{'title'}, 50)
5828                 print format_subject_html($co{'title'}, $co{'title_short'},
5829                                           href(action=>"commit", hash=>$commit), $ref);
5830                 print "</td>\n" .
5831                       "<td class=\"link\">" .
5832                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5833                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5834
5835                 if ($ftype eq 'blob') {
5836                         my $blob_current = $file_hash;
5837                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5838                         if (defined $blob_current && defined $blob_parent &&
5839                                         $blob_current ne $blob_parent) {
5840                                 print " | " .
5841                                         $cgi->a({-href => href(action=>"blobdiff",
5842                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5843                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5844                                                                file_name=>$file_name)},
5845                                                 "diff to current");
5846                         }
5847                 }
5848                 print "</td>\n" .
5849                       "</tr>\n";
5850         }
5851         if (defined $extra) {
5852                 print "<tr>\n" .
5853                       "<td colspan=\"4\">$extra</td>\n" .
5854                       "</tr>\n";
5855         }
5856         print "</table>\n";
5857 }
5858
5859 sub git_tags_body {
5860         # uses global variable $project
5861         my ($taglist, $from, $to, $extra) = @_;
5862         $from = 0 unless defined $from;
5863         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5864
5865         print "<table class=\"tags\">\n";
5866         my $alternate = 1;
5867         for (my $i = $from; $i <= $to; $i++) {
5868                 my $entry = $taglist->[$i];
5869                 my %tag = %$entry;
5870                 my $comment = $tag{'subject'};
5871                 my $comment_short;
5872                 if (defined $comment) {
5873                         $comment_short = chop_str($comment, 30, 5);
5874                 }
5875                 if ($alternate) {
5876                         print "<tr class=\"dark\">\n";
5877                 } else {
5878                         print "<tr class=\"light\">\n";
5879                 }
5880                 $alternate ^= 1;
5881                 if (defined $tag{'age'}) {
5882                         print "<td><i>$tag{'age'}</i></td>\n";
5883                 } else {
5884                         print "<td></td>\n";
5885                 }
5886                 print "<td>" .
5887                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5888                                -class => "list name"}, esc_html($tag{'name'})) .
5889                       "</td>\n" .
5890                       "<td>";
5891                 if (defined $comment) {
5892                         print format_subject_html($comment, $comment_short,
5893                                                   href(action=>"tag", hash=>$tag{'id'}));
5894                 }
5895                 print "</td>\n" .
5896                       "<td class=\"selflink\">";
5897                 if ($tag{'type'} eq "tag") {
5898                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5899                 } else {
5900                         print "&nbsp;";
5901                 }
5902                 print "</td>\n" .
5903                       "<td class=\"link\">" . " | " .
5904                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5905                 if ($tag{'reftype'} eq "commit") {
5906                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5907                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5908                 } elsif ($tag{'reftype'} eq "blob") {
5909                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5910                 }
5911                 print "</td>\n" .
5912                       "</tr>";
5913         }
5914         if (defined $extra) {
5915                 print "<tr>\n" .
5916                       "<td colspan=\"5\">$extra</td>\n" .
5917                       "</tr>\n";
5918         }
5919         print "</table>\n";
5920 }
5921
5922 sub git_heads_body {
5923         # uses global variable $project
5924         my ($headlist, $head_at, $from, $to, $extra) = @_;
5925         $from = 0 unless defined $from;
5926         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5927
5928         print "<table class=\"heads\">\n";
5929         my $alternate = 1;
5930         for (my $i = $from; $i <= $to; $i++) {
5931                 my $entry = $headlist->[$i];
5932                 my %ref = %$entry;
5933                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5934                 if ($alternate) {
5935                         print "<tr class=\"dark\">\n";
5936                 } else {
5937                         print "<tr class=\"light\">\n";
5938                 }
5939                 $alternate ^= 1;
5940                 print "<td><i>$ref{'age'}</i></td>\n" .
5941                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5942                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5943                                -class => "list name"},esc_html($ref{'name'})) .
5944                       "</td>\n" .
5945                       "<td class=\"link\">" .
5946                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5947                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5948                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5949                       "</td>\n" .
5950                       "</tr>";
5951         }
5952         if (defined $extra) {
5953                 print "<tr>\n" .
5954                       "<td colspan=\"3\">$extra</td>\n" .
5955                       "</tr>\n";
5956         }
5957         print "</table>\n";
5958 }
5959
5960 # Display a single remote block
5961 sub git_remote_block {
5962         my ($remote, $rdata, $limit, $head) = @_;
5963
5964         my $heads = $rdata->{'heads'};
5965         my $fetch = $rdata->{'fetch'};
5966         my $push = $rdata->{'push'};
5967
5968         my $urls_table = "<table class=\"projects_list\">\n" ;
5969
5970         if (defined $fetch) {
5971                 if ($fetch eq $push) {
5972                         $urls_table .= format_repo_url("URL", $fetch);
5973                 } else {
5974                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5975                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5976                 }
5977         } elsif (defined $push) {
5978                 $urls_table .= format_repo_url("Push URL", $push);
5979         } else {
5980                 $urls_table .= format_repo_url("", "No remote URL");
5981         }
5982
5983         $urls_table .= "</table>\n";
5984
5985         my $dots;
5986         if (defined $limit && $limit < @$heads) {
5987                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5988         }
5989
5990         print $urls_table;
5991         git_heads_body($heads, $head, 0, $limit, $dots);
5992 }
5993
5994 # Display a list of remote names with the respective fetch and push URLs
5995 sub git_remotes_list {
5996         my ($remotedata, $limit) = @_;
5997         print "<table class=\"heads\">\n";
5998         my $alternate = 1;
5999         my @remotes = sort keys %$remotedata;
6000
6001         my $limited = $limit && $limit < @remotes;
6002
6003         $#remotes = $limit - 1 if $limited;
6004
6005         while (my $remote = shift @remotes) {
6006                 my $rdata = $remotedata->{$remote};
6007                 my $fetch = $rdata->{'fetch'};
6008                 my $push = $rdata->{'push'};
6009                 if ($alternate) {
6010                         print "<tr class=\"dark\">\n";
6011                 } else {
6012                         print "<tr class=\"light\">\n";
6013                 }
6014                 $alternate ^= 1;
6015                 print "<td>" .
6016                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6017                                -class=> "list name"},esc_html($remote)) .
6018                       "</td>";
6019                 print "<td class=\"link\">" .
6020                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6021                       " | " .
6022                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6023                       "</td>";
6024
6025                 print "</tr>\n";
6026         }
6027
6028         if ($limited) {
6029                 print "<tr>\n" .
6030                       "<td colspan=\"3\">" .
6031                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6032                       "</td>\n" . "</tr>\n";
6033         }
6034
6035         print "</table>";
6036 }
6037
6038 # Display remote heads grouped by remote, unless there are too many
6039 # remotes, in which case we only display the remote names
6040 sub git_remotes_body {
6041         my ($remotedata, $limit, $head) = @_;
6042         if ($limit and $limit < keys %$remotedata) {
6043                 git_remotes_list($remotedata, $limit);
6044         } else {
6045                 fill_remote_heads($remotedata);
6046                 while (my ($remote, $rdata) = each %$remotedata) {
6047                         git_print_section({-class=>"remote", -id=>$remote},
6048                                 ["remotes", $remote, $remote], sub {
6049                                         git_remote_block($remote, $rdata, $limit, $head);
6050                                 });
6051                 }
6052         }
6053 }
6054
6055 sub git_search_message {
6056         my %co = @_;
6057
6058         my $greptype;
6059         if ($searchtype eq 'commit') {
6060                 $greptype = "--grep=";
6061         } elsif ($searchtype eq 'author') {
6062                 $greptype = "--author=";
6063         } elsif ($searchtype eq 'committer') {
6064                 $greptype = "--committer=";
6065         }
6066         $greptype .= $searchtext;
6067         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6068                                        $greptype, '--regexp-ignore-case',
6069                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6070
6071         my $paging_nav = '';
6072         if ($page > 0) {
6073                 $paging_nav .=
6074                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6075                                 "first") .
6076                         " &sdot; " .
6077                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6078                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6079         } else {
6080                 $paging_nav .= "first &sdot; prev";
6081         }
6082         my $next_link = '';
6083         if ($#commitlist >= 100) {
6084                 $next_link =
6085                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6086                                  -accesskey => "n", -title => "Alt-n"}, "next");
6087                 $paging_nav .= " &sdot; $next_link";
6088         } else {
6089                 $paging_nav .= " &sdot; next";
6090         }
6091
6092         git_header_html();
6093
6094         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6095         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6096         if ($page == 0 && !@commitlist) {
6097                 print "<p>No match.</p>\n";
6098         } else {
6099                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6100         }
6101
6102         git_footer_html();
6103 }
6104
6105 sub git_search_changes {
6106         my %co = @_;
6107
6108         local $/ = "\n";
6109         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6110                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6111                 ($search_use_regexp ? '--pickaxe-regex' : ())
6112                         or die_error(500, "Open git-log failed");
6113
6114         git_header_html();
6115
6116         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6117         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6118
6119         print "<table class=\"pickaxe search\">\n";
6120         my $alternate = 1;
6121         undef %co;
6122         my @files;
6123         while (my $line = <$fd>) {
6124                 chomp $line;
6125                 next unless $line;
6126
6127                 my %set = parse_difftree_raw_line($line);
6128                 if (defined $set{'commit'}) {
6129                         # finish previous commit
6130                         if (%co) {
6131                                 print "</td>\n" .
6132                                       "<td class=\"link\">" .
6133                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6134                                               "commit") .
6135                                       " | " .
6136                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6137                                                              hash_base=>$co{'id'})},
6138                                               "tree") .
6139                                       "</td>\n" .
6140                                       "</tr>\n";
6141                         }
6142
6143                         if ($alternate) {
6144                                 print "<tr class=\"dark\">\n";
6145                         } else {
6146                                 print "<tr class=\"light\">\n";
6147                         }
6148                         $alternate ^= 1;
6149                         %co = parse_commit($set{'commit'});
6150                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6151                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6152                               "<td><i>$author</i></td>\n" .
6153                               "<td>" .
6154                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6155                                       -class => "list subject"},
6156                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6157                 } elsif (defined $set{'to_id'}) {
6158                         next if ($set{'to_id'} =~ m/^0{40}$/);
6159
6160                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6161                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6162                                       -class => "list"},
6163                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6164                               "<br/>\n";
6165                 }
6166         }
6167         close $fd;
6168
6169         # finish last commit (warning: repetition!)
6170         if (%co) {
6171                 print "</td>\n" .
6172                       "<td class=\"link\">" .
6173                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6174                               "commit") .
6175                       " | " .
6176                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6177                                              hash_base=>$co{'id'})},
6178                               "tree") .
6179                       "</td>\n" .
6180                       "</tr>\n";
6181         }
6182
6183         print "</table>\n";
6184
6185         git_footer_html();
6186 }
6187
6188 sub git_search_files {
6189         my %co = @_;
6190
6191         local $/ = "\n";
6192         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6193                 $search_use_regexp ? ('-E', '-i') : '-F',
6194                 $searchtext, $co{'tree'}
6195                         or die_error(500, "Open git-grep failed");
6196
6197         git_header_html();
6198
6199         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6200         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6201
6202         print "<table class=\"grep_search\">\n";
6203         my $alternate = 1;
6204         my $matches = 0;
6205         my $lastfile = '';
6206         my $file_href;
6207         while (my $line = <$fd>) {
6208                 chomp $line;
6209                 my ($file, $lno, $ltext, $binary);
6210                 last if ($matches++ > 1000);
6211                 if ($line =~ /^Binary file (.+) matches$/) {
6212                         $file = $1;
6213                         $binary = 1;
6214                 } else {
6215                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6216                         $file =~ s/^$co{'tree'}://;
6217                 }
6218                 if ($file ne $lastfile) {
6219                         $lastfile and print "</td></tr>\n";
6220                         if ($alternate++) {
6221                                 print "<tr class=\"dark\">\n";
6222                         } else {
6223                                 print "<tr class=\"light\">\n";
6224                         }
6225                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6226                                           file_name=>$file);
6227                         print "<td class=\"list\">".
6228                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6229                         print "</td><td>\n";
6230                         $lastfile = $file;
6231                 }
6232                 if ($binary) {
6233                         print "<div class=\"binary\">Binary file</div>\n";
6234                 } else {
6235                         $ltext = untabify($ltext);
6236                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6237                                 $ltext = esc_html($1, -nbsp=>1);
6238                                 $ltext .= '<span class="match">';
6239                                 $ltext .= esc_html($2, -nbsp=>1);
6240                                 $ltext .= '</span>';
6241                                 $ltext .= esc_html($3, -nbsp=>1);
6242                         } else {
6243                                 $ltext = esc_html($ltext, -nbsp=>1);
6244                         }
6245                         print "<div class=\"pre\">" .
6246                                 $cgi->a({-href => $file_href.'#l'.$lno,
6247                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6248                                 ' ' .  $ltext . "</div>\n";
6249                 }
6250         }
6251         if ($lastfile) {
6252                 print "</td></tr>\n";
6253                 if ($matches > 1000) {
6254                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6255                 }
6256         } else {
6257                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6258         }
6259         close $fd;
6260
6261         print "</table>\n";
6262
6263         git_footer_html();
6264 }
6265
6266 sub git_search_grep_body {
6267         my ($commitlist, $from, $to, $extra) = @_;
6268         $from = 0 unless defined $from;
6269         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6270
6271         print "<table class=\"commit_search\">\n";
6272         my $alternate = 1;
6273         for (my $i = $from; $i <= $to; $i++) {
6274                 my %co = %{$commitlist->[$i]};
6275                 if (!%co) {
6276                         next;
6277                 }
6278                 my $commit = $co{'id'};
6279                 if ($alternate) {
6280                         print "<tr class=\"dark\">\n";
6281                 } else {
6282                         print "<tr class=\"light\">\n";
6283                 }
6284                 $alternate ^= 1;
6285                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6286                       format_author_html('td', \%co, 15, 5) .
6287                       "<td>" .
6288                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6289                                -class => "list subject"},
6290                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6291                 my $comment = $co{'comment'};
6292                 foreach my $line (@$comment) {
6293                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6294                                 my ($lead, $match, $trail) = ($1, $2, $3);
6295                                 $match = chop_str($match, 70, 5, 'center');
6296                                 my $contextlen = int((80 - length($match))/2);
6297                                 $contextlen = 30 if ($contextlen > 30);
6298                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6299                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6300
6301                                 $lead  = esc_html($lead);
6302                                 $match = esc_html($match);
6303                                 $trail = esc_html($trail);
6304
6305                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6306                         }
6307                 }
6308                 print "</td>\n" .
6309                       "<td class=\"link\">" .
6310                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6311                       " | " .
6312                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6313                       " | " .
6314                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6315                 print "</td>\n" .
6316                       "</tr>\n";
6317         }
6318         if (defined $extra) {
6319                 print "<tr>\n" .
6320                       "<td colspan=\"3\">$extra</td>\n" .
6321                       "</tr>\n";
6322         }
6323         print "</table>\n";
6324 }
6325
6326 ## ======================================================================
6327 ## ======================================================================
6328 ## actions
6329
6330 sub git_project_list {
6331         my $order = $input_params{'order'};
6332         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6333                 die_error(400, "Unknown order parameter");
6334         }
6335
6336         my @list = git_get_projects_list($project_filter, $strict_export);
6337         if (!@list) {
6338                 die_error(404, "No projects found");
6339         }
6340
6341         git_header_html();
6342         if (defined $home_text && -f $home_text) {
6343                 print "<div class=\"index_include\">\n";
6344                 insert_file($home_text);
6345                 print "</div>\n";
6346         }
6347
6348         git_project_search_form($searchtext, $search_use_regexp);
6349         git_project_list_body(\@list, $order);
6350         git_footer_html();
6351 }
6352
6353 sub git_forks {
6354         my $order = $input_params{'order'};
6355         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6356                 die_error(400, "Unknown order parameter");
6357         }
6358
6359         my $filter = $project;
6360         $filter =~ s/\.git$//;
6361         my @list = git_get_projects_list($filter);
6362         if (!@list) {
6363                 die_error(404, "No forks found");
6364         }
6365
6366         git_header_html();
6367         git_print_page_nav('','');
6368         git_print_header_div('summary', "$project forks");
6369         git_project_list_body(\@list, $order);
6370         git_footer_html();
6371 }
6372
6373 sub git_project_index {
6374         my @projects = git_get_projects_list($project_filter, $strict_export);
6375         if (!@projects) {
6376                 die_error(404, "No projects found");
6377         }
6378
6379         print $cgi->header(
6380                 -type => 'text/plain',
6381                 -charset => 'utf-8',
6382                 -content_disposition => 'inline; filename="index.aux"');
6383
6384         foreach my $pr (@projects) {
6385                 if (!exists $pr->{'owner'}) {
6386                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6387                 }
6388
6389                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6390                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6391                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6392                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6393                 $path  =~ s/ /\+/g;
6394                 $owner =~ s/ /\+/g;
6395
6396                 print "$path $owner\n";
6397         }
6398 }
6399
6400 sub git_summary {
6401         my $descr = git_get_project_description($project) || "none";
6402         my %co = parse_commit("HEAD");
6403         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6404         my $head = $co{'id'};
6405         my $remote_heads = gitweb_check_feature('remote_heads');
6406
6407         my $owner = git_get_project_owner($project);
6408
6409         my $refs = git_get_references();
6410         # These get_*_list functions return one more to allow us to see if
6411         # there are more ...
6412         my @taglist  = git_get_tags_list(16);
6413         my @headlist = git_get_heads_list(16);
6414         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6415         my @forklist;
6416         my $check_forks = gitweb_check_feature('forks');
6417
6418         if ($check_forks) {
6419                 # find forks of a project
6420                 my $filter = $project;
6421                 $filter =~ s/\.git$//;
6422                 @forklist = git_get_projects_list($filter);
6423                 # filter out forks of forks
6424                 @forklist = filter_forks_from_projects_list(\@forklist)
6425                         if (@forklist);
6426         }
6427
6428         git_header_html();
6429         git_print_page_nav('summary','', $head);
6430
6431         print "<div class=\"title\">&nbsp;</div>\n";
6432         print "<table class=\"projects_list\">\n" .
6433               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6434               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6435         if (defined $cd{'rfc2822'}) {
6436                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6437                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6438         }
6439
6440         # use per project git URL list in $projectroot/$project/cloneurl
6441         # or make project git URL from git base URL and project name
6442         my $url_tag = "URL";
6443         my @url_list = git_get_project_url_list($project);
6444         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6445         foreach my $git_url (@url_list) {
6446                 next unless $git_url;
6447                 print format_repo_url($url_tag, $git_url);
6448                 $url_tag = "";
6449         }
6450
6451         # Tag cloud
6452         my $show_ctags = gitweb_check_feature('ctags');
6453         if ($show_ctags) {
6454                 my $ctags = git_get_project_ctags($project);
6455                 if (%$ctags) {
6456                         # without ability to add tags, don't show if there are none
6457                         my $cloud = git_populate_project_tagcloud($ctags);
6458                         print "<tr id=\"metadata_ctags\">" .
6459                               "<td>content tags</td>" .
6460                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6461                               "</tr>\n";
6462                 }
6463         }
6464
6465         print "</table>\n";
6466
6467         # If XSS prevention is on, we don't include README.html.
6468         # TODO: Allow a readme in some safe format.
6469         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6470                 print "<div class=\"title\">readme</div>\n" .
6471                       "<div class=\"readme\">\n";
6472                 insert_file("$projectroot/$project/README.html");
6473                 print "\n</div>\n"; # class="readme"
6474         }
6475
6476         # we need to request one more than 16 (0..15) to check if
6477         # those 16 are all
6478         my @commitlist = $head ? parse_commits($head, 17) : ();
6479         if (@commitlist) {
6480                 git_print_header_div('shortlog');
6481                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6482                                   $#commitlist <=  15 ? undef :
6483                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6484         }
6485
6486         if (@taglist) {
6487                 git_print_header_div('tags');
6488                 git_tags_body(\@taglist, 0, 15,
6489                               $#taglist <=  15 ? undef :
6490                               $cgi->a({-href => href(action=>"tags")}, "..."));
6491         }
6492
6493         if (@headlist) {
6494                 git_print_header_div('heads');
6495                 git_heads_body(\@headlist, $head, 0, 15,
6496                                $#headlist <= 15 ? undef :
6497                                $cgi->a({-href => href(action=>"heads")}, "..."));
6498         }
6499
6500         if (%remotedata) {
6501                 git_print_header_div('remotes');
6502                 git_remotes_body(\%remotedata, 15, $head);
6503         }
6504
6505         if (@forklist) {
6506                 git_print_header_div('forks');
6507                 git_project_list_body(\@forklist, 'age', 0, 15,
6508                                       $#forklist <= 15 ? undef :
6509                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6510                                       'no_header');
6511         }
6512
6513         git_footer_html();
6514 }
6515
6516 sub git_tag {
6517         my %tag = parse_tag($hash);
6518
6519         if (! %tag) {
6520                 die_error(404, "Unknown tag object");
6521         }
6522
6523         my $head = git_get_head_hash($project);
6524         git_header_html();
6525         git_print_page_nav('','', $head,undef,$head);
6526         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6527         print "<div class=\"title_text\">\n" .
6528               "<table class=\"object_header\">\n" .
6529               "<tr>\n" .
6530               "<td>object</td>\n" .
6531               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6532                                $tag{'object'}) . "</td>\n" .
6533               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6534                                               $tag{'type'}) . "</td>\n" .
6535               "</tr>\n";
6536         if (defined($tag{'author'})) {
6537                 git_print_authorship_rows(\%tag, 'author');
6538         }
6539         print "</table>\n\n" .
6540               "</div>\n";
6541         print "<div class=\"page_body\">";
6542         my $comment = $tag{'comment'};
6543         foreach my $line (@$comment) {
6544                 chomp $line;
6545                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6546         }
6547         print "</div>\n";
6548         git_footer_html();
6549 }
6550
6551 sub git_blame_common {
6552         my $format = shift || 'porcelain';
6553         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6554                 $format = 'incremental';
6555                 $action = 'blame_incremental'; # for page title etc
6556         }
6557
6558         # permissions
6559         gitweb_check_feature('blame')
6560                 or die_error(403, "Blame view not allowed");
6561
6562         # error checking
6563         die_error(400, "No file name given") unless $file_name;
6564         $hash_base ||= git_get_head_hash($project);
6565         die_error(404, "Couldn't find base commit") unless $hash_base;
6566         my %co = parse_commit($hash_base)
6567                 or die_error(404, "Commit not found");
6568         my $ftype = "blob";
6569         if (!defined $hash) {
6570                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6571                         or die_error(404, "Error looking up file");
6572         } else {
6573                 $ftype = git_get_type($hash);
6574                 if ($ftype !~ "blob") {
6575                         die_error(400, "Object is not a blob");
6576                 }
6577         }
6578
6579         my $fd;
6580         if ($format eq 'incremental') {
6581                 # get file contents (as base)
6582                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6583                         or die_error(500, "Open git-cat-file failed");
6584         } elsif ($format eq 'data') {
6585                 # run git-blame --incremental
6586                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6587                         $hash_base, "--", $file_name
6588                         or die_error(500, "Open git-blame --incremental failed");
6589         } else {
6590                 # run git-blame --porcelain
6591                 open $fd, "-|", git_cmd(), "blame", '-p',
6592                         $hash_base, '--', $file_name
6593                         or die_error(500, "Open git-blame --porcelain failed");
6594         }
6595
6596         # incremental blame data returns early
6597         if ($format eq 'data') {
6598                 print $cgi->header(
6599                         -type=>"text/plain", -charset => "utf-8",
6600                         -status=> "200 OK");
6601                 local $| = 1; # output autoflush
6602                 while (my $line = <$fd>) {
6603                         print to_utf8($line);
6604                 }
6605                 close $fd
6606                         or print "ERROR $!\n";
6607
6608                 print 'END';
6609                 if (defined $t0 && gitweb_check_feature('timed')) {
6610                         print ' '.
6611                               tv_interval($t0, [ gettimeofday() ]).
6612                               ' '.$number_of_git_cmds;
6613                 }
6614                 print "\n";
6615
6616                 return;
6617         }
6618
6619         # page header
6620         git_header_html();
6621         my $formats_nav =
6622                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6623                         "blob") .
6624                 " | ";
6625         if ($format eq 'incremental') {
6626                 $formats_nav .=
6627                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6628                                 "blame") . " (non-incremental)";
6629         } else {
6630                 $formats_nav .=
6631                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6632                                 "blame") . " (incremental)";
6633         }
6634         $formats_nav .=
6635                 " | " .
6636                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6637                         "history") .
6638                 " | " .
6639                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6640                         "HEAD");
6641         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6642         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6643         git_print_page_path($file_name, $ftype, $hash_base);
6644
6645         # page body
6646         if ($format eq 'incremental') {
6647                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6648                       "This page requires JavaScript to run.\n Use ".
6649                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6650                               'this page').
6651                       " instead.\n".
6652                       "</b></center></div>\n</noscript>\n";
6653
6654                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6655         }
6656
6657         print qq!<div class="page_body">\n!;
6658         print qq!<div id="progress_info">... / ...</div>\n!
6659                 if ($format eq 'incremental');
6660         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6661               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6662               qq!<thead>\n!.
6663               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6664               qq!</thead>\n!.
6665               qq!<tbody>\n!;
6666
6667         my @rev_color = qw(light dark);
6668         my $num_colors = scalar(@rev_color);
6669         my $current_color = 0;
6670
6671         if ($format eq 'incremental') {
6672                 my $color_class = $rev_color[$current_color];
6673
6674                 #contents of a file
6675                 my $linenr = 0;
6676         LINE:
6677                 while (my $line = <$fd>) {
6678                         chomp $line;
6679                         $linenr++;
6680
6681                         print qq!<tr id="l$linenr" class="$color_class">!.
6682                               qq!<td class="sha1"><a href=""> </a></td>!.
6683                               qq!<td class="linenr">!.
6684                               qq!<a class="linenr" href="">$linenr</a></td>!;
6685                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6686                         print qq!</tr>\n!;
6687                 }
6688
6689         } else { # porcelain, i.e. ordinary blame
6690                 my %metainfo = (); # saves information about commits
6691
6692                 # blame data
6693         LINE:
6694                 while (my $line = <$fd>) {
6695                         chomp $line;
6696                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6697                         # no <lines in group> for subsequent lines in group of lines
6698                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6699                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6700                         if (!exists $metainfo{$full_rev}) {
6701                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6702                         }
6703                         my $meta = $metainfo{$full_rev};
6704                         my $data;
6705                         while ($data = <$fd>) {
6706                                 chomp $data;
6707                                 last if ($data =~ s/^\t//); # contents of line
6708                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6709                                         $meta->{$1} = $2 unless exists $meta->{$1};
6710                                 }
6711                                 if ($data =~ /^previous /) {
6712                                         $meta->{'nprevious'}++;
6713                                 }
6714                         }
6715                         my $short_rev = substr($full_rev, 0, 8);
6716                         my $author = $meta->{'author'};
6717                         my %date =
6718                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6719                         my $date = $date{'iso-tz'};
6720                         if ($group_size) {
6721                                 $current_color = ($current_color + 1) % $num_colors;
6722                         }
6723                         my $tr_class = $rev_color[$current_color];
6724                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6725                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6726                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6727                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6728                         if ($group_size) {
6729                                 print "<td class=\"sha1\"";
6730                                 print " title=\"". esc_html($author) . ", $date\"";
6731                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6732                                 print ">";
6733                                 print $cgi->a({-href => href(action=>"commit",
6734                                                              hash=>$full_rev,
6735                                                              file_name=>$file_name)},
6736                                               esc_html($short_rev));
6737                                 if ($group_size >= 2) {
6738                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6739                                         if (@author_initials) {
6740                                                 print "<br />" .
6741                                                       esc_html(join('', @author_initials));
6742                                                 #           or join('.', ...)
6743                                         }
6744                                 }
6745                                 print "</td>\n";
6746                         }
6747                         # 'previous' <sha1 of parent commit> <filename at commit>
6748                         if (exists $meta->{'previous'} &&
6749                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6750                                 $meta->{'parent'} = $1;
6751                                 $meta->{'file_parent'} = unquote($2);
6752                         }
6753                         my $linenr_commit =
6754                                 exists($meta->{'parent'}) ?
6755                                 $meta->{'parent'} : $full_rev;
6756                         my $linenr_filename =
6757                                 exists($meta->{'file_parent'}) ?
6758                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6759                         my $blamed = href(action => 'blame',
6760                                           file_name => $linenr_filename,
6761                                           hash_base => $linenr_commit);
6762                         print "<td class=\"linenr\">";
6763                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6764                                         -class => "linenr" },
6765                                       esc_html($lineno));
6766                         print "</td>";
6767                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6768                         print "</tr>\n";
6769                 } # end while
6770
6771         }
6772
6773         # footer
6774         print "</tbody>\n".
6775               "</table>\n"; # class="blame"
6776         print "</div>\n";   # class="blame_body"
6777         close $fd
6778                 or print "Reading blob failed\n";
6779
6780         git_footer_html();
6781 }
6782
6783 sub git_blame {
6784         git_blame_common();
6785 }
6786
6787 sub git_blame_incremental {
6788         git_blame_common('incremental');
6789 }
6790
6791 sub git_blame_data {
6792         git_blame_common('data');
6793 }
6794
6795 sub git_tags {
6796         my $head = git_get_head_hash($project);
6797         git_header_html();
6798         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6799         git_print_header_div('summary', $project);
6800
6801         my @tagslist = git_get_tags_list();
6802         if (@tagslist) {
6803                 git_tags_body(\@tagslist);
6804         }
6805         git_footer_html();
6806 }
6807
6808 sub git_heads {
6809         my $head = git_get_head_hash($project);
6810         git_header_html();
6811         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6812         git_print_header_div('summary', $project);
6813
6814         my @headslist = git_get_heads_list();
6815         if (@headslist) {
6816                 git_heads_body(\@headslist, $head);
6817         }
6818         git_footer_html();
6819 }
6820
6821 # used both for single remote view and for list of all the remotes
6822 sub git_remotes {
6823         gitweb_check_feature('remote_heads')
6824                 or die_error(403, "Remote heads view is disabled");
6825
6826         my $head = git_get_head_hash($project);
6827         my $remote = $input_params{'hash'};
6828
6829         my $remotedata = git_get_remotes_list($remote);
6830         die_error(500, "Unable to get remote information") unless defined $remotedata;
6831
6832         unless (%$remotedata) {
6833                 die_error(404, defined $remote ?
6834                         "Remote $remote not found" :
6835                         "No remotes found");
6836         }
6837
6838         git_header_html(undef, undef, -action_extra => $remote);
6839         git_print_page_nav('', '',  $head, undef, $head,
6840                 format_ref_views($remote ? '' : 'remotes'));
6841
6842         fill_remote_heads($remotedata);
6843         if (defined $remote) {
6844                 git_print_header_div('remotes', "$remote remote for $project");
6845                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6846         } else {
6847                 git_print_header_div('summary', "$project remotes");
6848                 git_remotes_body($remotedata, undef, $head);
6849         }
6850
6851         git_footer_html();
6852 }
6853
6854 sub git_blob_plain {
6855         my $type = shift;
6856         my $expires;
6857
6858         if (!defined $hash) {
6859                 if (defined $file_name) {
6860                         my $base = $hash_base || git_get_head_hash($project);
6861                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6862                                 or die_error(404, "Cannot find file");
6863                 } else {
6864                         die_error(400, "No file name defined");
6865                 }
6866         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6867                 # blobs defined by non-textual hash id's can be cached
6868                 $expires = "+1d";
6869         }
6870
6871         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6872                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6873
6874         # content-type (can include charset)
6875         $type = blob_contenttype($fd, $file_name, $type);
6876
6877         # "save as" filename, even when no $file_name is given
6878         my $save_as = "$hash";
6879         if (defined $file_name) {
6880                 $save_as = $file_name;
6881         } elsif ($type =~ m/^text\//) {
6882                 $save_as .= '.txt';
6883         }
6884
6885         # With XSS prevention on, blobs of all types except a few known safe
6886         # ones are served with "Content-Disposition: attachment" to make sure
6887         # they don't run in our security domain.  For certain image types,
6888         # blob view writes an <img> tag referring to blob_plain view, and we
6889         # want to be sure not to break that by serving the image as an
6890         # attachment (though Firefox 3 doesn't seem to care).
6891         my $sandbox = $prevent_xss &&
6892                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6893
6894         # serve text/* as text/plain
6895         if ($prevent_xss &&
6896             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6897              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6898                 my $rest = $1;
6899                 $rest = defined $rest ? $rest : '';
6900                 $type = "text/plain$rest";
6901         }
6902
6903         print $cgi->header(
6904                 -type => $type,
6905                 -expires => $expires,
6906                 -content_disposition =>
6907                         ($sandbox ? 'attachment' : 'inline')
6908                         . '; filename="' . $save_as . '"');
6909         local $/ = undef;
6910         binmode STDOUT, ':raw';
6911         print <$fd>;
6912         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6913         close $fd;
6914 }
6915
6916 sub git_blob {
6917         my $expires;
6918
6919         if (!defined $hash) {
6920                 if (defined $file_name) {
6921                         my $base = $hash_base || git_get_head_hash($project);
6922                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6923                                 or die_error(404, "Cannot find file");
6924                 } else {
6925                         die_error(400, "No file name defined");
6926                 }
6927         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6928                 # blobs defined by non-textual hash id's can be cached
6929                 $expires = "+1d";
6930         }
6931
6932         my $have_blame = gitweb_check_feature('blame');
6933         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6934                 or die_error(500, "Couldn't cat $file_name, $hash");
6935         my $mimetype = blob_mimetype($fd, $file_name);
6936         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6937         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6938                 close $fd;
6939                 return git_blob_plain($mimetype);
6940         }
6941         # we can have blame only for text/* mimetype
6942         $have_blame &&= ($mimetype =~ m!^text/!);
6943
6944         my $highlight = gitweb_check_feature('highlight');
6945         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6946         $fd = run_highlighter($fd, $highlight, $syntax)
6947                 if $syntax;
6948
6949         git_header_html(undef, $expires);
6950         my $formats_nav = '';
6951         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6952                 if (defined $file_name) {
6953                         if ($have_blame) {
6954                                 $formats_nav .=
6955                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6956                                                 "blame") .
6957                                         " | ";
6958                         }
6959                         $formats_nav .=
6960                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6961                                         "history") .
6962                                 " | " .
6963                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6964                                         "raw") .
6965                                 " | " .
6966                                 $cgi->a({-href => href(action=>"blob",
6967                                                        hash_base=>"HEAD", file_name=>$file_name)},
6968                                         "HEAD");
6969                 } else {
6970                         $formats_nav .=
6971                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6972                                         "raw");
6973                 }
6974                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6975                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6976         } else {
6977                 print "<div class=\"page_nav\">\n" .
6978                       "<br/><br/></div>\n" .
6979                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6980         }
6981         git_print_page_path($file_name, "blob", $hash_base);
6982         print "<div class=\"page_body\">\n";
6983         if ($mimetype =~ m!^image/!) {
6984                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6985                 if ($file_name) {
6986                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6987                 }
6988                 print qq! src="! .
6989                       href(action=>"blob_plain", hash=>$hash,
6990                            hash_base=>$hash_base, file_name=>$file_name) .
6991                       qq!" />\n!;
6992         } else {
6993                 my $nr;
6994                 while (my $line = <$fd>) {
6995                         chomp $line;
6996                         $nr++;
6997                         $line = untabify($line);
6998                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6999                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7000                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7001                 }
7002         }
7003         close $fd
7004                 or print "Reading blob failed.\n";
7005         print "</div>";
7006         git_footer_html();
7007 }
7008
7009 sub git_tree {
7010         if (!defined $hash_base) {
7011                 $hash_base = "HEAD";
7012         }
7013         if (!defined $hash) {
7014                 if (defined $file_name) {
7015                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7016                 } else {
7017                         $hash = $hash_base;
7018                 }
7019         }
7020         die_error(404, "No such tree") unless defined($hash);
7021
7022         my $show_sizes = gitweb_check_feature('show-sizes');
7023         my $have_blame = gitweb_check_feature('blame');
7024
7025         my @entries = ();
7026         {
7027                 local $/ = "\0";
7028                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7029                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7030                         or die_error(500, "Open git-ls-tree failed");
7031                 @entries = map { chomp; $_ } <$fd>;
7032                 close $fd
7033                         or die_error(404, "Reading tree failed");
7034         }
7035
7036         my $refs = git_get_references();
7037         my $ref = format_ref_marker($refs, $hash_base);
7038         git_header_html();
7039         my $basedir = '';
7040         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7041                 my @views_nav = ();
7042                 if (defined $file_name) {
7043                         push @views_nav,
7044                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7045                                         "history"),
7046                                 $cgi->a({-href => href(action=>"tree",
7047                                                        hash_base=>"HEAD", file_name=>$file_name)},
7048                                         "HEAD"),
7049                 }
7050                 my $snapshot_links = format_snapshot_links($hash);
7051                 if (defined $snapshot_links) {
7052                         # FIXME: Should be available when we have no hash base as well.
7053                         push @views_nav, $snapshot_links;
7054                 }
7055                 git_print_page_nav('tree','', $hash_base, undef, undef,
7056                                    join(' | ', @views_nav));
7057                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7058         } else {
7059                 undef $hash_base;
7060                 print "<div class=\"page_nav\">\n";
7061                 print "<br/><br/></div>\n";
7062                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7063         }
7064         if (defined $file_name) {
7065                 $basedir = $file_name;
7066                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7067                         $basedir .= '/';
7068                 }
7069                 git_print_page_path($file_name, 'tree', $hash_base);
7070         }
7071         print "<div class=\"page_body\">\n";
7072         print "<table class=\"tree\">\n";
7073         my $alternate = 1;
7074         # '..' (top directory) link if possible
7075         if (defined $hash_base &&
7076             defined $file_name && $file_name =~ m![^/]+$!) {
7077                 if ($alternate) {
7078                         print "<tr class=\"dark\">\n";
7079                 } else {
7080                         print "<tr class=\"light\">\n";
7081                 }
7082                 $alternate ^= 1;
7083
7084                 my $up = $file_name;
7085                 $up =~ s!/?[^/]+$!!;
7086                 undef $up unless $up;
7087                 # based on git_print_tree_entry
7088                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7089                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7090                 print '<td class="list">';
7091                 print $cgi->a({-href => href(action=>"tree",
7092                                              hash_base=>$hash_base,
7093                                              file_name=>$up)},
7094                               "..");
7095                 print "</td>\n";
7096                 print "<td class=\"link\"></td>\n";
7097
7098                 print "</tr>\n";
7099         }
7100         foreach my $line (@entries) {
7101                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7102
7103                 if ($alternate) {
7104                         print "<tr class=\"dark\">\n";
7105                 } else {
7106                         print "<tr class=\"light\">\n";
7107                 }
7108                 $alternate ^= 1;
7109
7110                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7111
7112                 print "</tr>\n";
7113         }
7114         print "</table>\n" .
7115               "</div>";
7116         git_footer_html();
7117 }
7118
7119 sub snapshot_name {
7120         my ($project, $hash) = @_;
7121
7122         # path/to/project.git  -> project
7123         # path/to/project/.git -> project
7124         my $name = to_utf8($project);
7125         $name =~ s,([^/])/*\.git$,$1,;
7126         $name = basename($name);
7127         # sanitize name
7128         $name =~ s/[[:cntrl:]]/?/g;
7129
7130         my $ver = $hash;
7131         if ($hash =~ /^[0-9a-fA-F]+$/) {
7132                 # shorten SHA-1 hash
7133                 my $full_hash = git_get_full_hash($project, $hash);
7134                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7135                         $ver = git_get_short_hash($project, $hash);
7136                 }
7137         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7138                 # tags don't need shortened SHA-1 hash
7139                 $ver = $1;
7140         } else {
7141                 # branches and other need shortened SHA-1 hash
7142                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7143                         $ver = $1;
7144                 }
7145                 $ver .= '-' . git_get_short_hash($project, $hash);
7146         }
7147         # in case of hierarchical branch names
7148         $ver =~ s!/!.!g;
7149
7150         # name = project-version_string
7151         $name = "$name-$ver";
7152
7153         return wantarray ? ($name, $name) : $name;
7154 }
7155
7156 sub exit_if_unmodified_since {
7157         my ($latest_epoch) = @_;
7158         our $cgi;
7159
7160         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7161         if (defined $if_modified) {
7162                 my $since;
7163                 if (eval { require HTTP::Date; 1; }) {
7164                         $since = HTTP::Date::str2time($if_modified);
7165                 } elsif (eval { require Time::ParseDate; 1; }) {
7166                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7167                 }
7168                 if (defined $since && $latest_epoch <= $since) {
7169                         my %latest_date = parse_date($latest_epoch);
7170                         print $cgi->header(
7171                                 -last_modified => $latest_date{'rfc2822'},
7172                                 -status => '304 Not Modified');
7173                         goto DONE_GITWEB;
7174                 }
7175         }
7176 }
7177
7178 sub git_snapshot {
7179         my $format = $input_params{'snapshot_format'};
7180         if (!@snapshot_fmts) {
7181                 die_error(403, "Snapshots not allowed");
7182         }
7183         # default to first supported snapshot format
7184         $format ||= $snapshot_fmts[0];
7185         if ($format !~ m/^[a-z0-9]+$/) {
7186                 die_error(400, "Invalid snapshot format parameter");
7187         } elsif (!exists($known_snapshot_formats{$format})) {
7188                 die_error(400, "Unknown snapshot format");
7189         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7190                 die_error(403, "Snapshot format not allowed");
7191         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7192                 die_error(403, "Unsupported snapshot format");
7193         }
7194
7195         my $type = git_get_type("$hash^{}");
7196         if (!$type) {
7197                 die_error(404, 'Object does not exist');
7198         }  elsif ($type eq 'blob') {
7199                 die_error(400, 'Object is not a tree-ish');
7200         }
7201
7202         my ($name, $prefix) = snapshot_name($project, $hash);
7203         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7204
7205         my %co = parse_commit($hash);
7206         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7207
7208         my $cmd = quote_command(
7209                 git_cmd(), 'archive',
7210                 "--format=$known_snapshot_formats{$format}{'format'}",
7211                 "--prefix=$prefix/", $hash);
7212         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7213                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7214         }
7215
7216         $filename =~ s/(["\\])/\\$1/g;
7217         my %latest_date;
7218         if (%co) {
7219                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7220         }
7221
7222         print $cgi->header(
7223                 -type => $known_snapshot_formats{$format}{'type'},
7224                 -content_disposition => 'inline; filename="' . $filename . '"',
7225                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7226                 -status => '200 OK');
7227
7228         open my $fd, "-|", $cmd
7229                 or die_error(500, "Execute git-archive failed");
7230         binmode STDOUT, ':raw';
7231         print <$fd>;
7232         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7233         close $fd;
7234 }
7235
7236 sub git_log_generic {
7237         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7238
7239         my $head = git_get_head_hash($project);
7240         if (!defined $base) {
7241                 $base = $head;
7242         }
7243         if (!defined $page) {
7244                 $page = 0;
7245         }
7246         my $refs = git_get_references();
7247
7248         my $commit_hash = $base;
7249         if (defined $parent) {
7250                 $commit_hash = "$parent..$base";
7251         }
7252         my @commitlist =
7253                 parse_commits($commit_hash, 101, (100 * $page),
7254                               defined $file_name ? ($file_name, "--full-history") : ());
7255
7256         my $ftype;
7257         if (!defined $file_hash && defined $file_name) {
7258                 # some commits could have deleted file in question,
7259                 # and not have it in tree, but one of them has to have it
7260                 for (my $i = 0; $i < @commitlist; $i++) {
7261                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7262                         last if defined $file_hash;
7263                 }
7264         }
7265         if (defined $file_hash) {
7266                 $ftype = git_get_type($file_hash);
7267         }
7268         if (defined $file_name && !defined $ftype) {
7269                 die_error(500, "Unknown type of object");
7270         }
7271         my %co;
7272         if (defined $file_name) {
7273                 %co = parse_commit($base)
7274                         or die_error(404, "Unknown commit object");
7275         }
7276
7277
7278         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7279         my $next_link = '';
7280         if ($#commitlist >= 100) {
7281                 $next_link =
7282                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7283                                  -accesskey => "n", -title => "Alt-n"}, "next");
7284         }
7285         my $patch_max = gitweb_get_feature('patches');
7286         if ($patch_max && !defined $file_name) {
7287                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7288                         $paging_nav .= " &sdot; " .
7289                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7290                                         "patches");
7291                 }
7292         }
7293
7294         git_header_html();
7295         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7296         if (defined $file_name) {
7297                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7298         } else {
7299                 git_print_header_div('summary', $project)
7300         }
7301         git_print_page_path($file_name, $ftype, $hash_base)
7302                 if (defined $file_name);
7303
7304         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7305                      $file_name, $file_hash, $ftype);
7306
7307         git_footer_html();
7308 }
7309
7310 sub git_log {
7311         git_log_generic('log', \&git_log_body,
7312                         $hash, $hash_parent);
7313 }
7314
7315 sub git_commit {
7316         $hash ||= $hash_base || "HEAD";
7317         my %co = parse_commit($hash)
7318             or die_error(404, "Unknown commit object");
7319
7320         my $parent  = $co{'parent'};
7321         my $parents = $co{'parents'}; # listref
7322
7323         # we need to prepare $formats_nav before any parameter munging
7324         my $formats_nav;
7325         if (!defined $parent) {
7326                 # --root commitdiff
7327                 $formats_nav .= '(initial)';
7328         } elsif (@$parents == 1) {
7329                 # single parent commit
7330                 $formats_nav .=
7331                         '(parent: ' .
7332                         $cgi->a({-href => href(action=>"commit",
7333                                                hash=>$parent)},
7334                                 esc_html(substr($parent, 0, 7))) .
7335                         ')';
7336         } else {
7337                 # merge commit
7338                 $formats_nav .=
7339                         '(merge: ' .
7340                         join(' ', map {
7341                                 $cgi->a({-href => href(action=>"commit",
7342                                                        hash=>$_)},
7343                                         esc_html(substr($_, 0, 7)));
7344                         } @$parents ) .
7345                         ')';
7346         }
7347         if (gitweb_check_feature('patches') && @$parents <= 1) {
7348                 $formats_nav .= " | " .
7349                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7350                                 "patch");
7351         }
7352
7353         if (!defined $parent) {
7354                 $parent = "--root";
7355         }
7356         my @difftree;
7357         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7358                 @diff_opts,
7359                 (@$parents <= 1 ? $parent : '-c'),
7360                 $hash, "--"
7361                 or die_error(500, "Open git-diff-tree failed");
7362         @difftree = map { chomp; $_ } <$fd>;
7363         close $fd or die_error(404, "Reading git-diff-tree failed");
7364
7365         # non-textual hash id's can be cached
7366         my $expires;
7367         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7368                 $expires = "+1d";
7369         }
7370         my $refs = git_get_references();
7371         my $ref = format_ref_marker($refs, $co{'id'});
7372
7373         git_header_html(undef, $expires);
7374         git_print_page_nav('commit', '',
7375                            $hash, $co{'tree'}, $hash,
7376                            $formats_nav);
7377
7378         if (defined $co{'parent'}) {
7379                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7380         } else {
7381                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7382         }
7383         print "<div class=\"title_text\">\n" .
7384               "<table class=\"object_header\">\n";
7385         git_print_authorship_rows(\%co);
7386         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7387         print "<tr>" .
7388               "<td>tree</td>" .
7389               "<td class=\"sha1\">" .
7390               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7391                        class => "list"}, $co{'tree'}) .
7392               "</td>" .
7393               "<td class=\"link\">" .
7394               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7395                       "tree");
7396         my $snapshot_links = format_snapshot_links($hash);
7397         if (defined $snapshot_links) {
7398                 print " | " . $snapshot_links;
7399         }
7400         print "</td>" .
7401               "</tr>\n";
7402
7403         foreach my $par (@$parents) {
7404                 print "<tr>" .
7405                       "<td>parent</td>" .
7406                       "<td class=\"sha1\">" .
7407                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7408                                class => "list"}, $par) .
7409                       "</td>" .
7410                       "<td class=\"link\">" .
7411                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7412                       " | " .
7413                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7414                       "</td>" .
7415                       "</tr>\n";
7416         }
7417         print "</table>".
7418               "</div>\n";
7419
7420         print "<div class=\"page_body\">\n";
7421         git_print_log($co{'comment'});
7422         print "</div>\n";
7423
7424         git_difftree_body(\@difftree, $hash, @$parents);
7425
7426         git_footer_html();
7427 }
7428
7429 sub git_object {
7430         # object is defined by:
7431         # - hash or hash_base alone
7432         # - hash_base and file_name
7433         my $type;
7434
7435         # - hash or hash_base alone
7436         if ($hash || ($hash_base && !defined $file_name)) {
7437                 my $object_id = $hash || $hash_base;
7438
7439                 open my $fd, "-|", quote_command(
7440                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7441                         or die_error(404, "Object does not exist");
7442                 $type = <$fd>;
7443                 chomp $type;
7444                 close $fd
7445                         or die_error(404, "Object does not exist");
7446
7447         # - hash_base and file_name
7448         } elsif ($hash_base && defined $file_name) {
7449                 $file_name =~ s,/+$,,;
7450
7451                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7452                         or die_error(404, "Base object does not exist");
7453
7454                 # here errors should not hapen
7455                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7456                         or die_error(500, "Open git-ls-tree failed");
7457                 my $line = <$fd>;
7458                 close $fd;
7459
7460                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7461                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7462                         die_error(404, "File or directory for given base does not exist");
7463                 }
7464                 $type = $2;
7465                 $hash = $3;
7466         } else {
7467                 die_error(400, "Not enough information to find object");
7468         }
7469
7470         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7471                                           hash=>$hash, hash_base=>$hash_base,
7472                                           file_name=>$file_name),
7473                              -status => '302 Found');
7474 }
7475
7476 sub git_blobdiff {
7477         my $format = shift || 'html';
7478         my $diff_style = $input_params{'diff_style'} || 'inline';
7479
7480         my $fd;
7481         my @difftree;
7482         my %diffinfo;
7483         my $expires;
7484
7485         # preparing $fd and %diffinfo for git_patchset_body
7486         # new style URI
7487         if (defined $hash_base && defined $hash_parent_base) {
7488                 if (defined $file_name) {
7489                         # read raw output
7490                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7491                                 $hash_parent_base, $hash_base,
7492                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7493                                 or die_error(500, "Open git-diff-tree failed");
7494                         @difftree = map { chomp; $_ } <$fd>;
7495                         close $fd
7496                                 or die_error(404, "Reading git-diff-tree failed");
7497                         @difftree
7498                                 or die_error(404, "Blob diff not found");
7499
7500                 } elsif (defined $hash &&
7501                          $hash =~ /[0-9a-fA-F]{40}/) {
7502                         # try to find filename from $hash
7503
7504                         # read filtered raw output
7505                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7506                                 $hash_parent_base, $hash_base, "--"
7507                                 or die_error(500, "Open git-diff-tree failed");
7508                         @difftree =
7509                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7510                                 # $hash == to_id
7511                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7512                                 map { chomp; $_ } <$fd>;
7513                         close $fd
7514                                 or die_error(404, "Reading git-diff-tree failed");
7515                         @difftree
7516                                 or die_error(404, "Blob diff not found");
7517
7518                 } else {
7519                         die_error(400, "Missing one of the blob diff parameters");
7520                 }
7521
7522                 if (@difftree > 1) {
7523                         die_error(400, "Ambiguous blob diff specification");
7524                 }
7525
7526                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7527                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7528                 $file_name   ||= $diffinfo{'to_file'};
7529
7530                 $hash_parent ||= $diffinfo{'from_id'};
7531                 $hash        ||= $diffinfo{'to_id'};
7532
7533                 # non-textual hash id's can be cached
7534                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7535                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7536                         $expires = '+1d';
7537                 }
7538
7539                 # open patch output
7540                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7541                         '-p', ($format eq 'html' ? "--full-index" : ()),
7542                         $hash_parent_base, $hash_base,
7543                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7544                         or die_error(500, "Open git-diff-tree failed");
7545         }
7546
7547         # old/legacy style URI -- not generated anymore since 1.4.3.
7548         if (!%diffinfo) {
7549                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7550         }
7551
7552         # header
7553         if ($format eq 'html') {
7554                 my $formats_nav =
7555                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7556                                 "raw");
7557                 $formats_nav .= diff_style_nav($diff_style);
7558                 git_header_html(undef, $expires);
7559                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7560                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7561                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7562                 } else {
7563                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7564                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7565                 }
7566                 if (defined $file_name) {
7567                         git_print_page_path($file_name, "blob", $hash_base);
7568                 } else {
7569                         print "<div class=\"page_path\"></div>\n";
7570                 }
7571
7572         } elsif ($format eq 'plain') {
7573                 print $cgi->header(
7574                         -type => 'text/plain',
7575                         -charset => 'utf-8',
7576                         -expires => $expires,
7577                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7578
7579                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7580
7581         } else {
7582                 die_error(400, "Unknown blobdiff format");
7583         }
7584
7585         # patch
7586         if ($format eq 'html') {
7587                 print "<div class=\"page_body\">\n";
7588
7589                 git_patchset_body($fd, $diff_style,
7590                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7591                 close $fd;
7592
7593                 print "</div>\n"; # class="page_body"
7594                 git_footer_html();
7595
7596         } else {
7597                 while (my $line = <$fd>) {
7598                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7599                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7600
7601                         print $line;
7602
7603                         last if $line =~ m!^\+\+\+!;
7604                 }
7605                 local $/ = undef;
7606                 print <$fd>;
7607                 close $fd;
7608         }
7609 }
7610
7611 sub git_blobdiff_plain {
7612         git_blobdiff('plain');
7613 }
7614
7615 # assumes that it is added as later part of already existing navigation,
7616 # so it returns "| foo | bar" rather than just "foo | bar"
7617 sub diff_style_nav {
7618         my ($diff_style, $is_combined) = @_;
7619         $diff_style ||= 'inline';
7620
7621         return "" if ($is_combined);
7622
7623         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7624         my %styles = @styles;
7625         @styles =
7626                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7627
7628         return join '',
7629                 map { " | ".$_ }
7630                 map {
7631                         $_ eq $diff_style ? $styles{$_} :
7632                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7633                 } @styles;
7634 }
7635
7636 sub git_commitdiff {
7637         my %params = @_;
7638         my $format = $params{-format} || 'html';
7639         my $diff_style = $input_params{'diff_style'} || 'inline';
7640
7641         my ($patch_max) = gitweb_get_feature('patches');
7642         if ($format eq 'patch') {
7643                 die_error(403, "Patch view not allowed") unless $patch_max;
7644         }
7645
7646         $hash ||= $hash_base || "HEAD";
7647         my %co = parse_commit($hash)
7648             or die_error(404, "Unknown commit object");
7649
7650         # choose format for commitdiff for merge
7651         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7652                 $hash_parent = '--cc';
7653         }
7654         # we need to prepare $formats_nav before almost any parameter munging
7655         my $formats_nav;
7656         if ($format eq 'html') {
7657                 $formats_nav =
7658                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7659                                 "raw");
7660                 if ($patch_max && @{$co{'parents'}} <= 1) {
7661                         $formats_nav .= " | " .
7662                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7663                                         "patch");
7664                 }
7665                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7666
7667                 if (defined $hash_parent &&
7668                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7669                         # commitdiff with two commits given
7670                         my $hash_parent_short = $hash_parent;
7671                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7672                                 $hash_parent_short = substr($hash_parent, 0, 7);
7673                         }
7674                         $formats_nav .=
7675                                 ' (from';
7676                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7677                                 if ($co{'parents'}[$i] eq $hash_parent) {
7678                                         $formats_nav .= ' parent ' . ($i+1);
7679                                         last;
7680                                 }
7681                         }
7682                         $formats_nav .= ': ' .
7683                                 $cgi->a({-href => href(-replay=>1,
7684                                                        hash=>$hash_parent, hash_base=>undef)},
7685                                         esc_html($hash_parent_short)) .
7686                                 ')';
7687                 } elsif (!$co{'parent'}) {
7688                         # --root commitdiff
7689                         $formats_nav .= ' (initial)';
7690                 } elsif (scalar @{$co{'parents'}} == 1) {
7691                         # single parent commit
7692                         $formats_nav .=
7693                                 ' (parent: ' .
7694                                 $cgi->a({-href => href(-replay=>1,
7695                                                        hash=>$co{'parent'}, hash_base=>undef)},
7696                                         esc_html(substr($co{'parent'}, 0, 7))) .
7697                                 ')';
7698                 } else {
7699                         # merge commit
7700                         if ($hash_parent eq '--cc') {
7701                                 $formats_nav .= ' | ' .
7702                                         $cgi->a({-href => href(-replay=>1,
7703                                                                hash=>$hash, hash_parent=>'-c')},
7704                                                 'combined');
7705                         } else { # $hash_parent eq '-c'
7706                                 $formats_nav .= ' | ' .
7707                                         $cgi->a({-href => href(-replay=>1,
7708                                                                hash=>$hash, hash_parent=>'--cc')},
7709                                                 'compact');
7710                         }
7711                         $formats_nav .=
7712                                 ' (merge: ' .
7713                                 join(' ', map {
7714                                         $cgi->a({-href => href(-replay=>1,
7715                                                                hash=>$_, hash_base=>undef)},
7716                                                 esc_html(substr($_, 0, 7)));
7717                                 } @{$co{'parents'}} ) .
7718                                 ')';
7719                 }
7720         }
7721
7722         my $hash_parent_param = $hash_parent;
7723         if (!defined $hash_parent_param) {
7724                 # --cc for multiple parents, --root for parentless
7725                 $hash_parent_param =
7726                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7727         }
7728
7729         # read commitdiff
7730         my $fd;
7731         my @difftree;
7732         if ($format eq 'html') {
7733                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7734                         "--no-commit-id", "--patch-with-raw", "--full-index",
7735                         $hash_parent_param, $hash, "--"
7736                         or die_error(500, "Open git-diff-tree failed");
7737
7738                 while (my $line = <$fd>) {
7739                         chomp $line;
7740                         # empty line ends raw part of diff-tree output
7741                         last unless $line;
7742                         push @difftree, scalar parse_difftree_raw_line($line);
7743                 }
7744
7745         } elsif ($format eq 'plain') {
7746                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7747                         '-p', $hash_parent_param, $hash, "--"
7748                         or die_error(500, "Open git-diff-tree failed");
7749         } elsif ($format eq 'patch') {
7750                 # For commit ranges, we limit the output to the number of
7751                 # patches specified in the 'patches' feature.
7752                 # For single commits, we limit the output to a single patch,
7753                 # diverging from the git-format-patch default.
7754                 my @commit_spec = ();
7755                 if ($hash_parent) {
7756                         if ($patch_max > 0) {
7757                                 push @commit_spec, "-$patch_max";
7758                         }
7759                         push @commit_spec, '-n', "$hash_parent..$hash";
7760                 } else {
7761                         if ($params{-single}) {
7762                                 push @commit_spec, '-1';
7763                         } else {
7764                                 if ($patch_max > 0) {
7765                                         push @commit_spec, "-$patch_max";
7766                                 }
7767                                 push @commit_spec, "-n";
7768                         }
7769                         push @commit_spec, '--root', $hash;
7770                 }
7771                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7772                         '--encoding=utf8', '--stdout', @commit_spec
7773                         or die_error(500, "Open git-format-patch failed");
7774         } else {
7775                 die_error(400, "Unknown commitdiff format");
7776         }
7777
7778         # non-textual hash id's can be cached
7779         my $expires;
7780         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7781                 $expires = "+1d";
7782         }
7783
7784         # write commit message
7785         if ($format eq 'html') {
7786                 my $refs = git_get_references();
7787                 my $ref = format_ref_marker($refs, $co{'id'});
7788
7789                 git_header_html(undef, $expires);
7790                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7791                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7792                 print "<div class=\"title_text\">\n" .
7793                       "<table class=\"object_header\">\n";
7794                 git_print_authorship_rows(\%co);
7795                 print "</table>".
7796                       "</div>\n";
7797                 print "<div class=\"page_body\">\n";
7798                 if (@{$co{'comment'}} > 1) {
7799                         print "<div class=\"log\">\n";
7800                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7801                         print "</div>\n"; # class="log"
7802                 }
7803
7804         } elsif ($format eq 'plain') {
7805                 my $refs = git_get_references("tags");
7806                 my $tagname = git_get_rev_name_tags($hash);
7807                 my $filename = basename($project) . "-$hash.patch";
7808
7809                 print $cgi->header(
7810                         -type => 'text/plain',
7811                         -charset => 'utf-8',
7812                         -expires => $expires,
7813                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7814                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7815                 print "From: " . to_utf8($co{'author'}) . "\n";
7816                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7817                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7818
7819                 print "X-Git-Tag: $tagname\n" if $tagname;
7820                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7821
7822                 foreach my $line (@{$co{'comment'}}) {
7823                         print to_utf8($line) . "\n";
7824                 }
7825                 print "---\n\n";
7826         } elsif ($format eq 'patch') {
7827                 my $filename = basename($project) . "-$hash.patch";
7828
7829                 print $cgi->header(
7830                         -type => 'text/plain',
7831                         -charset => 'utf-8',
7832                         -expires => $expires,
7833                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7834         }
7835
7836         # write patch
7837         if ($format eq 'html') {
7838                 my $use_parents = !defined $hash_parent ||
7839                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7840                 git_difftree_body(\@difftree, $hash,
7841                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7842                 print "<br/>\n";
7843
7844                 git_patchset_body($fd, $diff_style,
7845                                   \@difftree, $hash,
7846                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7847                 close $fd;
7848                 print "</div>\n"; # class="page_body"
7849                 git_footer_html();
7850
7851         } elsif ($format eq 'plain') {
7852                 local $/ = undef;
7853                 print <$fd>;
7854                 close $fd
7855                         or print "Reading git-diff-tree failed\n";
7856         } elsif ($format eq 'patch') {
7857                 local $/ = undef;
7858                 print <$fd>;
7859                 close $fd
7860                         or print "Reading git-format-patch failed\n";
7861         }
7862 }
7863
7864 sub git_commitdiff_plain {
7865         git_commitdiff(-format => 'plain');
7866 }
7867
7868 # format-patch-style patches
7869 sub git_patch {
7870         git_commitdiff(-format => 'patch', -single => 1);
7871 }
7872
7873 sub git_patches {
7874         git_commitdiff(-format => 'patch');
7875 }
7876
7877 sub git_history {
7878         git_log_generic('history', \&git_history_body,
7879                         $hash_base, $hash_parent_base,
7880                         $file_name, $hash);
7881 }
7882
7883 sub git_search {
7884         $searchtype ||= 'commit';
7885
7886         # check if appropriate features are enabled
7887         gitweb_check_feature('search')
7888                 or die_error(403, "Search is disabled");
7889         if ($searchtype eq 'pickaxe') {
7890                 # pickaxe may take all resources of your box and run for several minutes
7891                 # with every query - so decide by yourself how public you make this feature
7892                 gitweb_check_feature('pickaxe')
7893                         or die_error(403, "Pickaxe search is disabled");
7894         }
7895         if ($searchtype eq 'grep') {
7896                 # grep search might be potentially CPU-intensive, too
7897                 gitweb_check_feature('grep')
7898                         or die_error(403, "Grep search is disabled");
7899         }
7900
7901         if (!defined $searchtext) {
7902                 die_error(400, "Text field is empty");
7903         }
7904         if (!defined $hash) {
7905                 $hash = git_get_head_hash($project);
7906         }
7907         my %co = parse_commit($hash);
7908         if (!%co) {
7909                 die_error(404, "Unknown commit object");
7910         }
7911         if (!defined $page) {
7912                 $page = 0;
7913         }
7914
7915         if ($searchtype eq 'commit' ||
7916             $searchtype eq 'author' ||
7917             $searchtype eq 'committer') {
7918                 git_search_message(%co);
7919         } elsif ($searchtype eq 'pickaxe') {
7920                 git_search_changes(%co);
7921         } elsif ($searchtype eq 'grep') {
7922                 git_search_files(%co);
7923         } else {
7924                 die_error(400, "Unknown search type");
7925         }
7926 }
7927
7928 sub git_search_help {
7929         git_header_html();
7930         git_print_page_nav('','', $hash,$hash,$hash);
7931         print <<EOT;
7932 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7933 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7934 the pattern entered is recognized as the POSIX extended
7935 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7936 insensitive).</p>
7937 <dl>
7938 <dt><b>commit</b></dt>
7939 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7940 EOT
7941         my $have_grep = gitweb_check_feature('grep');
7942         if ($have_grep) {
7943                 print <<EOT;
7944 <dt><b>grep</b></dt>
7945 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7946     a different one) are searched for the given pattern. On large trees, this search can take
7947 a while and put some strain on the server, so please use it with some consideration. Note that
7948 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7949 case-sensitive.</dd>
7950 EOT
7951         }
7952         print <<EOT;
7953 <dt><b>author</b></dt>
7954 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7955 <dt><b>committer</b></dt>
7956 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7957 EOT
7958         my $have_pickaxe = gitweb_check_feature('pickaxe');
7959         if ($have_pickaxe) {
7960                 print <<EOT;
7961 <dt><b>pickaxe</b></dt>
7962 <dd>All commits that caused the string to appear or disappear from any file (changes that
7963 added, removed or "modified" the string) will be listed. This search can take a while and
7964 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7965 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7966 EOT
7967         }
7968         print "</dl>\n";
7969         git_footer_html();
7970 }
7971
7972 sub git_shortlog {
7973         git_log_generic('shortlog', \&git_shortlog_body,
7974                         $hash, $hash_parent);
7975 }
7976
7977 ## ......................................................................
7978 ## feeds (RSS, Atom; OPML)
7979
7980 sub git_feed {
7981         my $format = shift || 'atom';
7982         my $have_blame = gitweb_check_feature('blame');
7983
7984         # Atom: http://www.atomenabled.org/developers/syndication/
7985         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7986         if ($format ne 'rss' && $format ne 'atom') {
7987                 die_error(400, "Unknown web feed format");
7988         }
7989
7990         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7991         my $head = $hash || 'HEAD';
7992         my @commitlist = parse_commits($head, 150, 0, $file_name);
7993
7994         my %latest_commit;
7995         my %latest_date;
7996         my $content_type = "application/$format+xml";
7997         if (defined $cgi->http('HTTP_ACCEPT') &&
7998                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7999                 # browser (feed reader) prefers text/xml
8000                 $content_type = 'text/xml';
8001         }
8002         if (defined($commitlist[0])) {
8003                 %latest_commit = %{$commitlist[0]};
8004                 my $latest_epoch = $latest_commit{'committer_epoch'};
8005                 exit_if_unmodified_since($latest_epoch);
8006                 %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8007         }
8008         print $cgi->header(
8009                 -type => $content_type,
8010                 -charset => 'utf-8',
8011                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8012                 -status => '200 OK');
8013
8014         # Optimization: skip generating the body if client asks only
8015         # for Last-Modified date.
8016         return if ($cgi->request_method() eq 'HEAD');
8017
8018         # header variables
8019         my $title = "$site_name - $project/$action";
8020         my $feed_type = 'log';
8021         if (defined $hash) {
8022                 $title .= " - '$hash'";
8023                 $feed_type = 'branch log';
8024                 if (defined $file_name) {
8025                         $title .= " :: $file_name";
8026                         $feed_type = 'history';
8027                 }
8028         } elsif (defined $file_name) {
8029                 $title .= " - $file_name";
8030                 $feed_type = 'history';
8031         }
8032         $title .= " $feed_type";
8033         my $descr = git_get_project_description($project);
8034         if (defined $descr) {
8035                 $descr = esc_html($descr);
8036         } else {
8037                 $descr = "$project " .
8038                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8039                          " feed";
8040         }
8041         my $owner = git_get_project_owner($project);
8042         $owner = esc_html($owner);
8043
8044         #header
8045         my $alt_url;
8046         if (defined $file_name) {
8047                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8048         } elsif (defined $hash) {
8049                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8050         } else {
8051                 $alt_url = href(-full=>1, action=>"summary");
8052         }
8053         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8054         if ($format eq 'rss') {
8055                 print <<XML;
8056 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8057 <channel>
8058 XML
8059                 print "<title>$title</title>\n" .
8060                       "<link>$alt_url</link>\n" .
8061                       "<description>$descr</description>\n" .
8062                       "<language>en</language>\n" .
8063                       # project owner is responsible for 'editorial' content
8064                       "<managingEditor>$owner</managingEditor>\n";
8065                 if (defined $logo || defined $favicon) {
8066                         # prefer the logo to the favicon, since RSS
8067                         # doesn't allow both
8068                         my $img = esc_url($logo || $favicon);
8069                         print "<image>\n" .
8070                               "<url>$img</url>\n" .
8071                               "<title>$title</title>\n" .
8072                               "<link>$alt_url</link>\n" .
8073                               "</image>\n";
8074                 }
8075                 if (%latest_date) {
8076                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8077                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8078                 }
8079                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8080         } elsif ($format eq 'atom') {
8081                 print <<XML;
8082 <feed xmlns="http://www.w3.org/2005/Atom">
8083 XML
8084                 print "<title>$title</title>\n" .
8085                       "<subtitle>$descr</subtitle>\n" .
8086                       '<link rel="alternate" type="text/html" href="' .
8087                       $alt_url . '" />' . "\n" .
8088                       '<link rel="self" type="' . $content_type . '" href="' .
8089                       $cgi->self_url() . '" />' . "\n" .
8090                       "<id>" . href(-full=>1) . "</id>\n" .
8091                       # use project owner for feed author
8092                       "<author><name>$owner</name></author>\n";
8093                 if (defined $favicon) {
8094                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8095                 }
8096                 if (defined $logo) {
8097                         # not twice as wide as tall: 72 x 27 pixels
8098                         print "<logo>" . esc_url($logo) . "</logo>\n";
8099                 }
8100                 if (! %latest_date) {
8101                         # dummy date to keep the feed valid until commits trickle in:
8102                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8103                 } else {
8104                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8105                 }
8106                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8107         }
8108
8109         # contents
8110         for (my $i = 0; $i <= $#commitlist; $i++) {
8111                 my %co = %{$commitlist[$i]};
8112                 my $commit = $co{'id'};
8113                 # we read 150, we always show 30 and the ones more recent than 48 hours
8114                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8115                         last;
8116                 }
8117                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8118
8119                 # get list of changed files
8120                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8121                         $co{'parent'} || "--root",
8122                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8123                         or next;
8124                 my @difftree = map { chomp; $_ } <$fd>;
8125                 close $fd
8126                         or next;
8127
8128                 # print element (entry, item)
8129                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8130                 if ($format eq 'rss') {
8131                         print "<item>\n" .
8132                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8133                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8134                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8135                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8136                               "<link>$co_url</link>\n" .
8137                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8138                               "<content:encoded>" .
8139                               "<![CDATA[\n";
8140                 } elsif ($format eq 'atom') {
8141                         print "<entry>\n" .
8142                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8143                               "<updated>$cd{'iso-8601'}</updated>\n" .
8144                               "<author>\n" .
8145                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8146                         if ($co{'author_email'}) {
8147                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8148                         }
8149                         print "</author>\n" .
8150                               # use committer for contributor
8151                               "<contributor>\n" .
8152                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8153                         if ($co{'committer_email'}) {
8154                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8155                         }
8156                         print "</contributor>\n" .
8157                               "<published>$cd{'iso-8601'}</published>\n" .
8158                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8159                               "<id>$co_url</id>\n" .
8160                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8161                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8162                 }
8163                 my $comment = $co{'comment'};
8164                 print "<pre>\n";
8165                 foreach my $line (@$comment) {
8166                         $line = esc_html($line);
8167                         print "$line\n";
8168                 }
8169                 print "</pre><ul>\n";
8170                 foreach my $difftree_line (@difftree) {
8171                         my %difftree = parse_difftree_raw_line($difftree_line);
8172                         next if !$difftree{'from_id'};
8173
8174                         my $file = $difftree{'file'} || $difftree{'to_file'};
8175
8176                         print "<li>" .
8177                               "[" .
8178                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8179                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8180                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8181                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8182                                       -title => "diff"}, 'D');
8183                         if ($have_blame) {
8184                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8185                                                              file_name=>$file, hash_base=>$commit),
8186                                               -title => "blame"}, 'B');
8187                         }
8188                         # if this is not a feed of a file history
8189                         if (!defined $file_name || $file_name ne $file) {
8190                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8191                                                              file_name=>$file, hash=>$commit),
8192                                               -title => "history"}, 'H');
8193                         }
8194                         $file = esc_path($file);
8195                         print "] ".
8196                               "$file</li>\n";
8197                 }
8198                 if ($format eq 'rss') {
8199                         print "</ul>]]>\n" .
8200                               "</content:encoded>\n" .
8201                               "</item>\n";
8202                 } elsif ($format eq 'atom') {
8203                         print "</ul>\n</div>\n" .
8204                               "</content>\n" .
8205                               "</entry>\n";
8206                 }
8207         }
8208
8209         # end of feed
8210         if ($format eq 'rss') {
8211                 print "</channel>\n</rss>\n";
8212         } elsif ($format eq 'atom') {
8213                 print "</feed>\n";
8214         }
8215 }
8216
8217 sub git_rss {
8218         git_feed('rss');
8219 }
8220
8221 sub git_atom {
8222         git_feed('atom');
8223 }
8224
8225 sub git_opml {
8226         my @list = git_get_projects_list($project_filter, $strict_export);
8227         if (!@list) {
8228                 die_error(404, "No projects found");
8229         }
8230
8231         print $cgi->header(
8232                 -type => 'text/xml',
8233                 -charset => 'utf-8',
8234                 -content_disposition => 'inline; filename="opml.xml"');
8235
8236         my $title = esc_html($site_name);
8237         my $filter = " within subdirectory ";
8238         if (defined $project_filter) {
8239                 $filter .= esc_html($project_filter);
8240         } else {
8241                 $filter = "";
8242         }
8243         print <<XML;
8244 <?xml version="1.0" encoding="utf-8"?>
8245 <opml version="1.0">
8246 <head>
8247   <title>$title OPML Export$filter</title>
8248 </head>
8249 <body>
8250 <outline text="git RSS feeds">
8251 XML
8252
8253         foreach my $pr (@list) {
8254                 my %proj = %$pr;
8255                 my $head = git_get_head_hash($proj{'path'});
8256                 if (!defined $head) {
8257                         next;
8258                 }
8259                 $git_dir = "$projectroot/$proj{'path'}";
8260                 my %co = parse_commit($head);
8261                 if (!%co) {
8262                         next;
8263                 }
8264
8265                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8266                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8267                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8268                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8269         }
8270         print <<XML;
8271 </outline>
8272 </body>
8273 </opml>
8274 XML
8275 }