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

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