gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         # this must be last entry (for manipulation from JavaScript)
 764         javascript => "js"
 765 );
 766 our %cgi_param_mapping = @cgi_param_mapping;
 767
 768 # we will also need to know the possible actions, for validation
 769 our %actions = (
 770         "blame" => \&git_blame,
 771         "blame_incremental" => \&git_blame_incremental,
 772         "blame_data" => \&git_blame_data,
 773         "blobdiff" => \&git_blobdiff,
 774         "blobdiff_plain" => \&git_blobdiff_plain,
 775         "blob" => \&git_blob,
 776         "blob_plain" => \&git_blob_plain,
 777         "commitdiff" => \&git_commitdiff,
 778         "commitdiff_plain" => \&git_commitdiff_plain,
 779         "commit" => \&git_commit,
 780         "forks" => \&git_forks,
 781         "heads" => \&git_heads,
 782         "history" => \&git_history,
 783         "log" => \&git_log,
 784         "patch" => \&git_patch,
 785         "patches" => \&git_patches,
 786         "remotes" => \&git_remotes,
 787         "rss" => \&git_rss,
 788         "atom" => \&git_atom,
 789         "search" => \&git_search,
 790         "search_help" => \&git_search_help,
 791         "shortlog" => \&git_shortlog,
 792         "summary" => \&git_summary,
 793         "tag" => \&git_tag,
 794         "tags" => \&git_tags,
 795         "tree" => \&git_tree,
 796         "snapshot" => \&git_snapshot,
 797         "object" => \&git_object,
 798         # those below don't need $project
 799         "opml" => \&git_opml,
 800         "project_list" => \&git_project_list,
 801         "project_index" => \&git_project_index,
 802 );
 803
 804 # finally, we have the hash of allowed extra_options for the commands that
 805 # allow them
 806 our %allowed_options = (
 807         "--no-merges" => [ qw(rss atom log shortlog history) ],
 808 );
 809
 810 # fill %input_params with the CGI parameters. All values except for 'opt'
 811 # should be single values, but opt can be an array. We should probably
 812 # build an array of parameters that can be multi-valued, but since for the time
 813 # being it's only this one, we just single it out
 814 sub evaluate_query_params {
 815         our $cgi;
 816
 817         while (my ($name, $symbol) = each %cgi_param_mapping) {
 818                 if ($symbol eq 'opt') {
 819                         $input_params{$name} = [ $cgi->param($symbol) ];
 820                 } else {
 821                         $input_params{$name} = $cgi->param($symbol);
 822                 }
 823         }
 824 }
 825
 826 # now read PATH_INFO and update the parameter list for missing parameters
 827 sub evaluate_path_info {
 828         return if defined $input_params{'project'};
 829         return if !$path_info;
 830         $path_info =~ s,^/+,,;
 831         return if !$path_info;
 832
 833         # find which part of PATH_INFO is project
 834         my $project = $path_info;
 835         $project =~ s,/+$,,;
 836         while ($project && !check_head_link("$projectroot/$project")) {
 837                 $project =~ s,/*[^/]*$,,;
 838         }
 839         return unless $project;
 840         $input_params{'project'} = $project;
 841
 842         # do not change any parameters if an action is given using the query string
 843         return if $input_params{'action'};
 844         $path_info =~ s,^\Q$project\E/*,,;
 845
 846         # next, check if we have an action
 847         my $action = $path_info;
 848         $action =~ s,/.*$,,;
 849         if (exists $actions{$action}) {
 850                 $path_info =~ s,^$action/*,,;
 851                 $input_params{'action'} = $action;
 852         }
 853
 854         # list of actions that want hash_base instead of hash, but can have no
 855         # pathname (f) parameter
 856         my @wants_base = (
 857                 'tree',
 858                 'history',
 859         );
 860
 861         # we want to catch, among others
 862         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 863         my ($parentrefname, $parentpathname, $refname, $pathname) =
 864                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 865
 866         # first, analyze the 'current' part
 867         if (defined $pathname) {
 868                 # we got "branch:filename" or "branch:dir/"
 869                 # we could use git_get_type(branch:pathname), but:
 870                 # - it needs $git_dir
 871                 # - it does a git() call
 872                 # - the convention of terminating directories with a slash
 873                 #   makes it superfluous
 874                 # - embedding the action in the PATH_INFO would make it even
 875                 #   more superfluous
 876                 $pathname =~ s,^/+,,;
 877                 if (!$pathname || substr($pathname, -1) eq "/") {
 878                         $input_params{'action'} ||= "tree";
 879                         $pathname =~ s,/$,,;
 880                 } else {
 881                         # the default action depends on whether we had parent info
 882                         # or not
 883                         if ($parentrefname) {
 884                                 $input_params{'action'} ||= "blobdiff_plain";
 885                         } else {
 886                                 $input_params{'action'} ||= "blob_plain";
 887                         }
 888                 }
 889                 $input_params{'hash_base'} ||= $refname;
 890                 $input_params{'file_name'} ||= $pathname;
 891         } elsif (defined $refname) {
 892                 # we got "branch". In this case we have to choose if we have to
 893                 # set hash or hash_base.
 894                 #
 895                 # Most of the actions without a pathname only want hash to be
 896                 # set, except for the ones specified in @wants_base that want
 897                 # hash_base instead. It should also be noted that hand-crafted
 898                 # links having 'history' as an action and no pathname or hash
 899                 # set will fail, but that happens regardless of PATH_INFO.
 900                 if (defined $parentrefname) {
 901                         # if there is parent let the default be 'shortlog' action
 902                         # (for http://git.example.com/repo.git/A..B links); if there
 903                         # is no parent, dispatch will detect type of object and set
 904                         # action appropriately if required (if action is not set)
 905                         $input_params{'action'} ||= "shortlog";
 906                 }
 907                 if ($input_params{'action'} &&
 908                     grep { $_ eq $input_params{'action'} } @wants_base) {
 909                         $input_params{'hash_base'} ||= $refname;
 910                 } else {
 911                         $input_params{'hash'} ||= $refname;
 912                 }
 913         }
 914
 915         # next, handle the 'parent' part, if present
 916         if (defined $parentrefname) {
 917                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 918                 # someproject/blobdiff/oldrev..newrev:/filename
 919                 if ($parentpathname) {
 920                         $parentpathname =~ s,^/+,,;
 921                         $parentpathname =~ s,/$,,;
 922                         $input_params{'file_parent'} ||= $parentpathname;
 923                 } else {
 924                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 925                 }
 926                 # we assume that hash_parent_base is wanted if a path was specified,
 927                 # or if the action wants hash_base instead of hash
 928                 if (defined $input_params{'file_parent'} ||
 929                         grep { $_ eq $input_params{'action'} } @wants_base) {
 930                         $input_params{'hash_parent_base'} ||= $parentrefname;
 931                 } else {
 932                         $input_params{'hash_parent'} ||= $parentrefname;
 933                 }
 934         }
 935
 936         # for the snapshot action, we allow URLs in the form
 937         # $project/snapshot/$hash.ext
 938         # where .ext determines the snapshot and gets removed from the
 939         # passed $refname to provide the $hash.
 940         #
 941         # To be able to tell that $refname includes the format extension, we
 942         # require the following two conditions to be satisfied:
 943         # - the hash input parameter MUST have been set from the $refname part
 944         #   of the URL (i.e. they must be equal)
 945         # - the snapshot format MUST NOT have been defined already (e.g. from
 946         #   CGI parameter sf)
 947         # It's also useless to try any matching unless $refname has a dot,
 948         # so we check for that too
 949         if (defined $input_params{'action'} &&
 950                 $input_params{'action'} eq 'snapshot' &&
 951                 defined $refname && index($refname, '.') != -1 &&
 952                 $refname eq $input_params{'hash'} &&
 953                 !defined $input_params{'snapshot_format'}) {
 954                 # We loop over the known snapshot formats, checking for
 955                 # extensions. Allowed extensions are both the defined suffix
 956                 # (which includes the initial dot already) and the snapshot
 957                 # format key itself, with a prepended dot
 958                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 959                         my $hash = $refname;
 960                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 961                                 next;
 962                         }
 963                         my $sfx = $1;
 964                         # a valid suffix was found, so set the snapshot format
 965                         # and reset the hash parameter
 966                         $input_params{'snapshot_format'} = $fmt;
 967                         $input_params{'hash'} = $hash;
 968                         # we also set the format suffix to the one requested
 969                         # in the URL: this way a request for e.g. .tgz returns
 970                         # a .tgz instead of a .tar.gz
 971                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 972                         last;
 973                 }
 974         }
 975 }
 976
 977 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 978      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 979      $searchtext, $search_regexp);
 980 sub evaluate_and_validate_params {
 981         our $action = $input_params{'action'};
 982         if (defined $action) {
 983                 if (!validate_action($action)) {
 984                         die_error(400, "Invalid action parameter");
 985                 }
 986         }
 987
 988         # parameters which are pathnames
 989         our $project = $input_params{'project'};
 990         if (defined $project) {
 991                 if (!validate_project($project)) {
 992                         undef $project;
 993                         die_error(404, "No such project");
 994                 }
 995         }
 996
 997         our $file_name = $input_params{'file_name'};
 998         if (defined $file_name) {
 999                 if (!validate_pathname($file_name)) {
1000                         die_error(400, "Invalid file parameter");
1001                 }
1002         }
1003
1004         our $file_parent = $input_params{'file_parent'};
1005         if (defined $file_parent) {
1006                 if (!validate_pathname($file_parent)) {
1007                         die_error(400, "Invalid file parent parameter");
1008                 }
1009         }
1010
1011         # parameters which are refnames
1012         our $hash = $input_params{'hash'};
1013         if (defined $hash) {
1014                 if (!validate_refname($hash)) {
1015                         die_error(400, "Invalid hash parameter");
1016                 }
1017         }
1018
1019         our $hash_parent = $input_params{'hash_parent'};
1020         if (defined $hash_parent) {
1021                 if (!validate_refname($hash_parent)) {
1022                         die_error(400, "Invalid hash parent parameter");
1023                 }
1024         }
1025
1026         our $hash_base = $input_params{'hash_base'};
1027         if (defined $hash_base) {
1028                 if (!validate_refname($hash_base)) {
1029                         die_error(400, "Invalid hash base parameter");
1030                 }
1031         }
1032
1033         our @extra_options = @{$input_params{'extra_options'}};
1034         # @extra_options is always defined, since it can only be (currently) set from
1035         # CGI, and $cgi->param() returns the empty array in array context if the param
1036         # is not set
1037         foreach my $opt (@extra_options) {
1038                 if (not exists $allowed_options{$opt}) {
1039                         die_error(400, "Invalid option parameter");
1040                 }
1041                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1042                         die_error(400, "Invalid option parameter for this action");
1043                 }
1044         }
1045
1046         our $hash_parent_base = $input_params{'hash_parent_base'};
1047         if (defined $hash_parent_base) {
1048                 if (!validate_refname($hash_parent_base)) {
1049                         die_error(400, "Invalid hash parent base parameter");
1050                 }
1051         }
1052
1053         # other parameters
1054         our $page = $input_params{'page'};
1055         if (defined $page) {
1056                 if ($page =~ m/[^0-9]/) {
1057                         die_error(400, "Invalid page parameter");
1058                 }
1059         }
1060
1061         our $searchtype = $input_params{'searchtype'};
1062         if (defined $searchtype) {
1063                 if ($searchtype =~ m/[^a-z]/) {
1064                         die_error(400, "Invalid searchtype parameter");
1065                 }
1066         }
1067
1068         our $search_use_regexp = $input_params{'search_use_regexp'};
1069
1070         our $searchtext = $input_params{'searchtext'};
1071         our $search_regexp;
1072         if (defined $searchtext) {
1073                 if (length($searchtext) < 2) {
1074                         die_error(403, "At least two characters are required for search parameter");
1075                 }
1076                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1077         }
1078 }
1079
1080 # path to the current git repository
1081 our $git_dir;
1082 sub evaluate_git_dir {
1083         our $git_dir = "$projectroot/$project" if $project;
1084 }
1085
1086 our (@snapshot_fmts, $git_avatar);
1087 sub configure_gitweb_features {
1088         # list of supported snapshot formats
1089         our @snapshot_fmts = gitweb_get_feature('snapshot');
1090         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1091
1092         # check that the avatar feature is set to a known provider name,
1093         # and for each provider check if the dependencies are satisfied.
1094         # if the provider name is invalid or the dependencies are not met,
1095         # reset $git_avatar to the empty string.
1096         our ($git_avatar) = gitweb_get_feature('avatar');
1097         if ($git_avatar eq 'gravatar') {
1098                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1099         } elsif ($git_avatar eq 'picon') {
1100                 # no dependencies
1101         } else {
1102                 $git_avatar = '';
1103         }
1104 }
1105
1106 # custom error handler: 'die <message>' is Internal Server Error
1107 sub handle_errors_html {
1108         my $msg = shift; # it is already HTML escaped
1109
1110         # to avoid infinite loop where error occurs in die_error,
1111         # change handler to default handler, disabling handle_errors_html
1112         set_message("Error occured when inside die_error:\n$msg");
1113
1114         # you cannot jump out of die_error when called as error handler;
1115         # the subroutine set via CGI::Carp::set_message is called _after_
1116         # HTTP headers are already written, so it cannot write them itself
1117         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1118 }
1119 set_message(\&handle_errors_html);
1120
1121 # dispatch
1122 sub dispatch {
1123         if (!defined $action) {
1124                 if (defined $hash) {
1125                         $action = git_get_type($hash);
1126                 } elsif (defined $hash_base && defined $file_name) {
1127                         $action = git_get_type("$hash_base:$file_name");
1128                 } elsif (defined $project) {
1129                         $action = 'summary';
1130                 } else {
1131                         $action = 'project_list';
1132                 }
1133         }
1134         if (!defined($actions{$action})) {
1135                 die_error(400, "Unknown action");
1136         }
1137         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1138             !$project) {
1139                 die_error(400, "Project needed");
1140         }
1141         $actions{$action}->();
1142 }
1143
1144 sub reset_timer {
1145         our $t0 = [ gettimeofday() ]
1146                 if defined $t0;
1147         our $number_of_git_cmds = 0;
1148 }
1149
1150 our $first_request = 1;
1151 sub run_request {
1152         reset_timer();
1153
1154         evaluate_uri();
1155         if ($first_request) {
1156                 evaluate_gitweb_config();
1157                 evaluate_git_version();
1158         }
1159         if ($per_request_config) {
1160                 if (ref($per_request_config) eq 'CODE') {
1161                         $per_request_config->();
1162                 } elsif (!$first_request) {
1163                         evaluate_gitweb_config();
1164                 }
1165         }
1166         check_loadavg();
1167
1168         # $projectroot and $projects_list might be set in gitweb config file
1169         $projects_list ||= $projectroot;
1170
1171         evaluate_query_params();
1172         evaluate_path_info();
1173         evaluate_and_validate_params();
1174         evaluate_git_dir();
1175
1176         configure_gitweb_features();
1177
1178         dispatch();
1179 }
1180
1181 our $is_last_request = sub { 1 };
1182 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1183 our $CGI = 'CGI';
1184 our $cgi;
1185 sub configure_as_fcgi {
1186         require CGI::Fast;
1187         our $CGI = 'CGI::Fast';
1188
1189         my $request_number = 0;
1190         # let each child service 100 requests
1191         our $is_last_request = sub { ++$request_number > 100 };
1192 }
1193 sub evaluate_argv {
1194         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1195         configure_as_fcgi()
1196                 if $script_name =~ /\.fcgi$/;
1197
1198         return unless (@ARGV);
1199
1200         require Getopt::Long;
1201         Getopt::Long::GetOptions(
1202                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1203                 'nproc|n=i' => sub {
1204                         my ($arg, $val) = @_;
1205                         return unless eval { require FCGI::ProcManager; 1; };
1206                         my $proc_manager = FCGI::ProcManager->new({
1207                                 n_processes => $val,
1208                         });
1209                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1210                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1211                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1212                 },
1213         );
1214 }
1215
1216 sub run {
1217         evaluate_argv();
1218
1219         $first_request = 1;
1220         $pre_listen_hook->()
1221                 if $pre_listen_hook;
1222
1223  REQUEST:
1224         while ($cgi = $CGI->new()) {
1225                 $pre_dispatch_hook->()
1226                         if $pre_dispatch_hook;
1227
1228                 run_request();
1229
1230                 $post_dispatch_hook->()
1231                         if $post_dispatch_hook;
1232                 $first_request = 0;
1233
1234                 last REQUEST if ($is_last_request->());
1235         }
1236
1237  DONE_GITWEB:
1238         1;
1239 }
1240
1241 run();
1242
1243 if (defined caller) {
1244         # wrapped in a subroutine processing requests,
1245         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1246         return;
1247 } else {
1248         # pure CGI script, serving single request
1249         exit;
1250 }
1251
1252 ## ======================================================================
1253 ## action links
1254
1255 # possible values of extra options
1256 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1257 # -replay => 1      - start from a current view (replay with modifications)
1258 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1259 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1260 sub href {
1261         my %params = @_;
1262         # default is to use -absolute url() i.e. $my_uri
1263         my $href = $params{-full} ? $my_url : $my_uri;
1264
1265         # implicit -replay, must be first of implicit params
1266         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1267
1268         $params{'project'} = $project unless exists $params{'project'};
1269
1270         if ($params{-replay}) {
1271                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1272                         if (!exists $params{$name}) {
1273                                 $params{$name} = $input_params{$name};
1274                         }
1275                 }
1276         }
1277
1278         my $use_pathinfo = gitweb_check_feature('pathinfo');
1279         if (defined $params{'project'} &&
1280             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1281                 # try to put as many parameters as possible in PATH_INFO:
1282                 #   - project name
1283                 #   - action
1284                 #   - hash_parent or hash_parent_base:/file_parent
1285                 #   - hash or hash_base:/filename
1286                 #   - the snapshot_format as an appropriate suffix
1287
1288                 # When the script is the root DirectoryIndex for the domain,
1289                 # $href here would be something like http://gitweb.example.com/
1290                 # Thus, we strip any trailing / from $href, to spare us double
1291                 # slashes in the final URL
1292                 $href =~ s,/$,,;
1293
1294                 # Then add the project name, if present
1295                 $href .= "/".esc_path_info($params{'project'});
1296                 delete $params{'project'};
1297
1298                 # since we destructively absorb parameters, we keep this
1299                 # boolean that remembers if we're handling a snapshot
1300                 my $is_snapshot = $params{'action'} eq 'snapshot';
1301
1302                 # Summary just uses the project path URL, any other action is
1303                 # added to the URL
1304                 if (defined $params{'action'}) {
1305                         $href .= "/".esc_path_info($params{'action'})
1306                                 unless $params{'action'} eq 'summary';
1307                         delete $params{'action'};
1308                 }
1309
1310                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1311                 # stripping nonexistent or useless pieces
1312                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1313                         || $params{'hash_parent'} || $params{'hash'});
1314                 if (defined $params{'hash_base'}) {
1315                         if (defined $params{'hash_parent_base'}) {
1316                                 $href .= esc_path_info($params{'hash_parent_base'});
1317                                 # skip the file_parent if it's the same as the file_name
1318                                 if (defined $params{'file_parent'}) {
1319                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1320                                                 delete $params{'file_parent'};
1321                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1322                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1323                                                 delete $params{'file_parent'};
1324                                         }
1325                                 }
1326                                 $href .= "..";
1327                                 delete $params{'hash_parent'};
1328                                 delete $params{'hash_parent_base'};
1329                         } elsif (defined $params{'hash_parent'}) {
1330                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1331                                 delete $params{'hash_parent'};
1332                         }
1333
1334                         $href .= esc_path_info($params{'hash_base'});
1335                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1336                                 $href .= ":/".esc_path_info($params{'file_name'});
1337                                 delete $params{'file_name'};
1338                         }
1339                         delete $params{'hash'};
1340                         delete $params{'hash_base'};
1341                 } elsif (defined $params{'hash'}) {
1342                         $href .= esc_path_info($params{'hash'});
1343                         delete $params{'hash'};
1344                 }
1345
1346                 # If the action was a snapshot, we can absorb the
1347                 # snapshot_format parameter too
1348                 if ($is_snapshot) {
1349                         my $fmt = $params{'snapshot_format'};
1350                         # snapshot_format should always be defined when href()
1351                         # is called, but just in case some code forgets, we
1352                         # fall back to the default
1353                         $fmt ||= $snapshot_fmts[0];
1354                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1355                         delete $params{'snapshot_format'};
1356                 }
1357         }
1358
1359         # now encode the parameters explicitly
1360         my @result = ();
1361         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1362                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1363                 if (defined $params{$name}) {
1364                         if (ref($params{$name}) eq "ARRAY") {
1365                                 foreach my $par (@{$params{$name}}) {
1366                                         push @result, $symbol . "=" . esc_param($par);
1367                                 }
1368                         } else {
1369                                 push @result, $symbol . "=" . esc_param($params{$name});
1370                         }
1371                 }
1372         }
1373         $href .= "?" . join(';', @result) if scalar @result;
1374
1375         # final transformation: trailing spaces must be escaped (URI-encoded)
1376         $href =~ s/(\s+)$/CGI::escape($1)/e;
1377
1378         if ($params{-anchor}) {
1379                 $href .= "#".esc_param($params{-anchor});
1380         }
1381
1382         return $href;
1383 }
1384
1385
1386 ## ======================================================================
1387 ## validation, quoting/unquoting and escaping
1388
1389 sub validate_action {
1390         my $input = shift || return undef;
1391         return undef unless exists $actions{$input};
1392         return $input;
1393 }
1394
1395 sub validate_project {
1396         my $input = shift || return undef;
1397         if (!validate_pathname($input) ||
1398                 !(-d "$projectroot/$input") ||
1399                 !check_export_ok("$projectroot/$input") ||
1400                 ($strict_export && !project_in_list($input))) {
1401                 return undef;
1402         } else {
1403                 return $input;
1404         }
1405 }
1406
1407 sub validate_pathname {
1408         my $input = shift || return undef;
1409
1410         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1411         # at the beginning, at the end, and between slashes.
1412         # also this catches doubled slashes
1413         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1414                 return undef;
1415         }
1416         # no null characters
1417         if ($input =~ m!\0!) {
1418                 return undef;
1419         }
1420         return $input;
1421 }
1422
1423 sub validate_refname {
1424         my $input = shift || return undef;
1425
1426         # textual hashes are O.K.
1427         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1428                 return $input;
1429         }
1430         # it must be correct pathname
1431         $input = validate_pathname($input)
1432                 or return undef;
1433         # restrictions on ref name according to git-check-ref-format
1434         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1435                 return undef;
1436         }
1437         return $input;
1438 }
1439
1440 # decode sequences of octets in utf8 into Perl's internal form,
1441 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1442 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1443 sub to_utf8 {
1444         my $str = shift;
1445         return undef unless defined $str;
1446
1447         if (utf8::is_utf8($str) || utf8::decode($str)) {
1448                 return $str;
1449         } else {
1450                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1451         }
1452 }
1453
1454 # quote unsafe chars, but keep the slash, even when it's not
1455 # correct, but quoted slashes look too horrible in bookmarks
1456 sub esc_param {
1457         my $str = shift;
1458         return undef unless defined $str;
1459         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1460         $str =~ s/ /\+/g;
1461         return $str;
1462 }
1463
1464 # the quoting rules for path_info fragment are slightly different
1465 sub esc_path_info {
1466         my $str = shift;
1467         return undef unless defined $str;
1468
1469         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1470         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1471
1472         return $str;
1473 }
1474
1475 # quote unsafe chars in whole URL, so some characters cannot be quoted
1476 sub esc_url {
1477         my $str = shift;
1478         return undef unless defined $str;
1479         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1480         $str =~ s/ /\+/g;
1481         return $str;
1482 }
1483
1484 # quote unsafe characters in HTML attributes
1485 sub esc_attr {
1486
1487         # for XHTML conformance escaping '"' to '&quot;' is not enough
1488         return esc_html(@_);
1489 }
1490
1491 # replace invalid utf8 character with SUBSTITUTION sequence
1492 sub esc_html {
1493         my $str = shift;
1494         my %opts = @_;
1495
1496         return undef unless defined $str;
1497
1498         $str = to_utf8($str);
1499         $str = $cgi->escapeHTML($str);
1500         if ($opts{'-nbsp'}) {
1501                 $str =~ s/ /&nbsp;/g;
1502         }
1503         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1504         return $str;
1505 }
1506
1507 # quote control characters and escape filename to HTML
1508 sub esc_path {
1509         my $str = shift;
1510         my %opts = @_;
1511
1512         return undef unless defined $str;
1513
1514         $str = to_utf8($str);
1515         $str = $cgi->escapeHTML($str);
1516         if ($opts{'-nbsp'}) {
1517                 $str =~ s/ /&nbsp;/g;
1518         }
1519         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1520         return $str;
1521 }
1522
1523 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1524 sub sanitize {
1525         my $str = shift;
1526
1527         return undef unless defined $str;
1528
1529         $str = to_utf8($str);
1530         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1531         return $str;
1532 }
1533
1534 # Make control characters "printable", using character escape codes (CEC)
1535 sub quot_cec {
1536         my $cntrl = shift;
1537         my %opts = @_;
1538         my %es = ( # character escape codes, aka escape sequences
1539                 "\t" => '\t',   # tab            (HT)
1540                 "\n" => '\n',   # line feed      (LF)
1541                 "\r" => '\r',   # carrige return (CR)
1542                 "\f" => '\f',   # form feed      (FF)
1543                 "\b" => '\b',   # backspace      (BS)
1544                 "\a" => '\a',   # alarm (bell)   (BEL)
1545                 "\e" => '\e',   # escape         (ESC)
1546                 "\013" => '\v', # vertical tab   (VT)
1547                 "\000" => '\0', # nul character  (NUL)
1548         );
1549         my $chr = ( (exists $es{$cntrl})
1550                     ? $es{$cntrl}
1551                     : sprintf('\%2x', ord($cntrl)) );
1552         if ($opts{-nohtml}) {
1553                 return $chr;
1554         } else {
1555                 return "<span class=\"cntrl\">$chr</span>";
1556         }
1557 }
1558
1559 # Alternatively use unicode control pictures codepoints,
1560 # Unicode "printable representation" (PR)
1561 sub quot_upr {
1562         my $cntrl = shift;
1563         my %opts = @_;
1564
1565         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1566         if ($opts{-nohtml}) {
1567                 return $chr;
1568         } else {
1569                 return "<span class=\"cntrl\">$chr</span>";
1570         }
1571 }
1572
1573 # git may return quoted and escaped filenames
1574 sub unquote {
1575         my $str = shift;
1576
1577         sub unq {
1578                 my $seq = shift;
1579                 my %es = ( # character escape codes, aka escape sequences
1580                         't' => "\t",   # tab            (HT, TAB)
1581                         'n' => "\n",   # newline        (NL)
1582                         'r' => "\r",   # return         (CR)
1583                         'f' => "\f",   # form feed      (FF)
1584                         'b' => "\b",   # backspace      (BS)
1585                         'a' => "\a",   # alarm (bell)   (BEL)
1586                         'e' => "\e",   # escape         (ESC)
1587                         'v' => "\013", # vertical tab   (VT)
1588                 );
1589
1590                 if ($seq =~ m/^[0-7]{1,3}$/) {
1591                         # octal char sequence
1592                         return chr(oct($seq));
1593                 } elsif (exists $es{$seq}) {
1594                         # C escape sequence, aka character escape code
1595                         return $es{$seq};
1596                 }
1597                 # quoted ordinary character
1598                 return $seq;
1599         }
1600
1601         if ($str =~ m/^"(.*)"$/) {
1602                 # needs unquoting
1603                 $str = $1;
1604                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1605         }
1606         return $str;
1607 }
1608
1609 # escape tabs (convert tabs to spaces)
1610 sub untabify {
1611         my $line = shift;
1612
1613         while ((my $pos = index($line, "\t")) != -1) {
1614                 if (my $count = (8 - ($pos % 8))) {
1615                         my $spaces = ' ' x $count;
1616                         $line =~ s/\t/$spaces/;
1617                 }
1618         }
1619
1620         return $line;
1621 }
1622
1623 sub project_in_list {
1624         my $project = shift;
1625         my @list = git_get_projects_list();
1626         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1627 }
1628
1629 ## ----------------------------------------------------------------------
1630 ## HTML aware string manipulation
1631
1632 # Try to chop given string on a word boundary between position
1633 # $len and $len+$add_len. If there is no word boundary there,
1634 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1635 # (marking chopped part) would be longer than given string.
1636 sub chop_str {
1637         my $str = shift;
1638         my $len = shift;
1639         my $add_len = shift || 10;
1640         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1641
1642         # Make sure perl knows it is utf8 encoded so we don't
1643         # cut in the middle of a utf8 multibyte char.
1644         $str = to_utf8($str);
1645
1646         # allow only $len chars, but don't cut a word if it would fit in $add_len
1647         # if it doesn't fit, cut it if it's still longer than the dots we would add
1648         # remove chopped character entities entirely
1649
1650         # when chopping in the middle, distribute $len into left and right part
1651         # return early if chopping wouldn't make string shorter
1652         if ($where eq 'center') {
1653                 return $str if ($len + 5 >= length($str)); # filler is length 5
1654                 $len = int($len/2);
1655         } else {
1656                 return $str if ($len + 4 >= length($str)); # filler is length 4
1657         }
1658
1659         # regexps: ending and beginning with word part up to $add_len
1660         my $endre = qr/.{$len}\w{0,$add_len}/;
1661         my $begre = qr/\w{0,$add_len}.{$len}/;
1662
1663         if ($where eq 'left') {
1664                 $str =~ m/^(.*?)($begre)$/;
1665                 my ($lead, $body) = ($1, $2);
1666                 if (length($lead) > 4) {
1667                         $lead = " ...";
1668                 }
1669                 return "$lead$body";
1670
1671         } elsif ($where eq 'center') {
1672                 $str =~ m/^($endre)(.*)$/;
1673                 my ($left, $str)  = ($1, $2);
1674                 $str =~ m/^(.*?)($begre)$/;
1675                 my ($mid, $right) = ($1, $2);
1676                 if (length($mid) > 5) {
1677                         $mid = " ... ";
1678                 }
1679                 return "$left$mid$right";
1680
1681         } else {
1682                 $str =~ m/^($endre)(.*)$/;
1683                 my $body = $1;
1684                 my $tail = $2;
1685                 if (length($tail) > 4) {
1686                         $tail = "... ";
1687                 }
1688                 return "$body$tail";
1689         }
1690 }
1691
1692 # takes the same arguments as chop_str, but also wraps a <span> around the
1693 # result with a title attribute if it does get chopped. Additionally, the
1694 # string is HTML-escaped.
1695 sub chop_and_escape_str {
1696         my ($str) = @_;
1697
1698         my $chopped = chop_str(@_);
1699         $str = to_utf8($str);
1700         if ($chopped eq $str) {
1701                 return esc_html($chopped);
1702         } else {
1703                 $str =~ s/[[:cntrl:]]/?/g;
1704                 return $cgi->span({-title=>$str}, esc_html($chopped));
1705         }
1706 }
1707
1708 ## ----------------------------------------------------------------------
1709 ## functions returning short strings
1710
1711 # CSS class for given age value (in seconds)
1712 sub age_class {
1713         my $age = shift;
1714
1715         if (!defined $age) {
1716                 return "noage";
1717         } elsif ($age < 60*60*2) {
1718                 return "age0";
1719         } elsif ($age < 60*60*24*2) {
1720                 return "age1";
1721         } else {
1722                 return "age2";
1723         }
1724 }
1725
1726 # convert age in seconds to "nn units ago" string
1727 sub age_string {
1728         my $age = shift;
1729         my $age_str;
1730
1731         if ($age > 60*60*24*365*2) {
1732                 $age_str = (int $age/60/60/24/365);
1733                 $age_str .= " years ago";
1734         } elsif ($age > 60*60*24*(365/12)*2) {
1735                 $age_str = int $age/60/60/24/(365/12);
1736                 $age_str .= " months ago";
1737         } elsif ($age > 60*60*24*7*2) {
1738                 $age_str = int $age/60/60/24/7;
1739                 $age_str .= " weeks ago";
1740         } elsif ($age > 60*60*24*2) {
1741                 $age_str = int $age/60/60/24;
1742                 $age_str .= " days ago";
1743         } elsif ($age > 60*60*2) {
1744                 $age_str = int $age/60/60;
1745                 $age_str .= " hours ago";
1746         } elsif ($age > 60*2) {
1747                 $age_str = int $age/60;
1748                 $age_str .= " min ago";
1749         } elsif ($age > 2) {
1750                 $age_str = int $age;
1751                 $age_str .= " sec ago";
1752         } else {
1753                 $age_str .= " right now";
1754         }
1755         return $age_str;
1756 }
1757
1758 use constant {
1759         S_IFINVALID => 0030000,
1760         S_IFGITLINK => 0160000,
1761 };
1762
1763 # submodule/subproject, a commit object reference
1764 sub S_ISGITLINK {
1765         my $mode = shift;
1766
1767         return (($mode & S_IFMT) == S_IFGITLINK)
1768 }
1769
1770 # convert file mode in octal to symbolic file mode string
1771 sub mode_str {
1772         my $mode = oct shift;
1773
1774         if (S_ISGITLINK($mode)) {
1775                 return 'm---------';
1776         } elsif (S_ISDIR($mode & S_IFMT)) {
1777                 return 'drwxr-xr-x';
1778         } elsif (S_ISLNK($mode)) {
1779                 return 'lrwxrwxrwx';
1780         } elsif (S_ISREG($mode)) {
1781                 # git cares only about the executable bit
1782                 if ($mode & S_IXUSR) {
1783                         return '-rwxr-xr-x';
1784                 } else {
1785                         return '-rw-r--r--';
1786                 };
1787         } else {
1788                 return '----------';
1789         }
1790 }
1791
1792 # convert file mode in octal to file type string
1793 sub file_type {
1794         my $mode = shift;
1795
1796         if ($mode !~ m/^[0-7]+$/) {
1797                 return $mode;
1798         } else {
1799                 $mode = oct $mode;
1800         }
1801
1802         if (S_ISGITLINK($mode)) {
1803                 return "submodule";
1804         } elsif (S_ISDIR($mode & S_IFMT)) {
1805                 return "directory";
1806         } elsif (S_ISLNK($mode)) {
1807                 return "symlink";
1808         } elsif (S_ISREG($mode)) {
1809                 return "file";
1810         } else {
1811                 return "unknown";
1812         }
1813 }
1814
1815 # convert file mode in octal to file type description string
1816 sub file_type_long {
1817         my $mode = shift;
1818
1819         if ($mode !~ m/^[0-7]+$/) {
1820                 return $mode;
1821         } else {
1822                 $mode = oct $mode;
1823         }
1824
1825         if (S_ISGITLINK($mode)) {
1826                 return "submodule";
1827         } elsif (S_ISDIR($mode & S_IFMT)) {
1828                 return "directory";
1829         } elsif (S_ISLNK($mode)) {
1830                 return "symlink";
1831         } elsif (S_ISREG($mode)) {
1832                 if ($mode & S_IXUSR) {
1833                         return "executable";
1834                 } else {
1835                         return "file";
1836                 };
1837         } else {
1838                 return "unknown";
1839         }
1840 }
1841
1842
1843 ## ----------------------------------------------------------------------
1844 ## functions returning short HTML fragments, or transforming HTML fragments
1845 ## which don't belong to other sections
1846
1847 # format line of commit message.
1848 sub format_log_line_html {
1849         my $line = shift;
1850
1851         $line = esc_html($line, -nbsp=>1);
1852         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1853                 $cgi->a({-href => href(action=>"object", hash=>$1),
1854                                         -class => "text"}, $1);
1855         }eg;
1856
1857         return $line;
1858 }
1859
1860 # format marker of refs pointing to given object
1861
1862 # the destination action is chosen based on object type and current context:
1863 # - for annotated tags, we choose the tag view unless it's the current view
1864 #   already, in which case we go to shortlog view
1865 # - for other refs, we keep the current view if we're in history, shortlog or
1866 #   log view, and select shortlog otherwise
1867 sub format_ref_marker {
1868         my ($refs, $id) = @_;
1869         my $markers = '';
1870
1871         if (defined $refs->{$id}) {
1872                 foreach my $ref (@{$refs->{$id}}) {
1873                         # this code exploits the fact that non-lightweight tags are the
1874                         # only indirect objects, and that they are the only objects for which
1875                         # we want to use tag instead of shortlog as action
1876                         my ($type, $name) = qw();
1877                         my $indirect = ($ref =~ s/\^\{\}$//);
1878                         # e.g. tags/v2.6.11 or heads/next
1879                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1880                                 $type = $1;
1881                                 $name = $2;
1882                         } else {
1883                                 $type = "ref";
1884                                 $name = $ref;
1885                         }
1886
1887                         my $class = $type;
1888                         $class .= " indirect" if $indirect;
1889
1890                         my $dest_action = "shortlog";
1891
1892                         if ($indirect) {
1893                                 $dest_action = "tag" unless $action eq "tag";
1894                         } elsif ($action =~ /^(history|(short)?log)$/) {
1895                                 $dest_action = $action;
1896                         }
1897
1898                         my $dest = "";
1899                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1900                         $dest .= $ref;
1901
1902                         my $link = $cgi->a({
1903                                 -href => href(
1904                                         action=>$dest_action,
1905                                         hash=>$dest
1906                                 )}, $name);
1907
1908                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1909                                 $link . "</span>";
1910                 }
1911         }
1912
1913         if ($markers) {
1914                 return ' <span class="refs">'. $markers . '</span>';
1915         } else {
1916                 return "";
1917         }
1918 }
1919
1920 # format, perhaps shortened and with markers, title line
1921 sub format_subject_html {
1922         my ($long, $short, $href, $extra) = @_;
1923         $extra = '' unless defined($extra);
1924
1925         if (length($short) < length($long)) {
1926                 $long =~ s/[[:cntrl:]]/?/g;
1927                 return $cgi->a({-href => $href, -class => "list subject",
1928                                 -title => to_utf8($long)},
1929                        esc_html($short)) . $extra;
1930         } else {
1931                 return $cgi->a({-href => $href, -class => "list subject"},
1932                        esc_html($long)) . $extra;
1933         }
1934 }
1935
1936 # Rather than recomputing the url for an email multiple times, we cache it
1937 # after the first hit. This gives a visible benefit in views where the avatar
1938 # for the same email is used repeatedly (e.g. shortlog).
1939 # The cache is shared by all avatar engines (currently gravatar only), which
1940 # are free to use it as preferred. Since only one avatar engine is used for any
1941 # given page, there's no risk for cache conflicts.
1942 our %avatar_cache = ();
1943
1944 # Compute the picon url for a given email, by using the picon search service over at
1945 # http://www.cs.indiana.edu/picons/search.html
1946 sub picon_url {
1947         my $email = lc shift;
1948         if (!$avatar_cache{$email}) {
1949                 my ($user, $domain) = split('@', $email);
1950                 $avatar_cache{$email} =
1951                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1952                         "$domain/$user/" .
1953                         "users+domains+unknown/up/single";
1954         }
1955         return $avatar_cache{$email};
1956 }
1957
1958 # Compute the gravatar url for a given email, if it's not in the cache already.
1959 # Gravatar stores only the part of the URL before the size, since that's the
1960 # one computationally more expensive. This also allows reuse of the cache for
1961 # different sizes (for this particular engine).
1962 sub gravatar_url {
1963         my $email = lc shift;
1964         my $size = shift;
1965         $avatar_cache{$email} ||=
1966                 "http://www.gravatar.com/avatar/" .
1967                         Digest::MD5::md5_hex($email) . "?s=";
1968         return $avatar_cache{$email} . $size;
1969 }
1970
1971 # Insert an avatar for the given $email at the given $size if the feature
1972 # is enabled.
1973 sub git_get_avatar {
1974         my ($email, %opts) = @_;
1975         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1976         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1977         $opts{-size} ||= 'default';
1978         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1979         my $url = "";
1980         if ($git_avatar eq 'gravatar') {
1981                 $url = gravatar_url($email, $size);
1982         } elsif ($git_avatar eq 'picon') {
1983                 $url = picon_url($email);
1984         }
1985         # Other providers can be added by extending the if chain, defining $url
1986         # as needed. If no variant puts something in $url, we assume avatars
1987         # are completely disabled/unavailable.
1988         if ($url) {
1989                 return $pre_white .
1990                        "<img width=\"$size\" " .
1991                             "class=\"avatar\" " .
1992                             "src=\"".esc_url($url)."\" " .
1993                             "alt=\"\" " .
1994                        "/>" . $post_white;
1995         } else {
1996                 return "";
1997         }
1998 }
1999
2000 sub format_search_author {
2001         my ($author, $searchtype, $displaytext) = @_;
2002         my $have_search = gitweb_check_feature('search');
2003
2004         if ($have_search) {
2005                 my $performed = "";
2006                 if ($searchtype eq 'author') {
2007                         $performed = "authored";
2008                 } elsif ($searchtype eq 'committer') {
2009                         $performed = "committed";
2010                 }
2011
2012                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2013                                 searchtext=>$author,
2014                                 searchtype=>$searchtype), class=>"list",
2015                                 title=>"Search for commits $performed by $author"},
2016                                 $displaytext);
2017
2018         } else {
2019                 return $displaytext;
2020         }
2021 }
2022
2023 # format the author name of the given commit with the given tag
2024 # the author name is chopped and escaped according to the other
2025 # optional parameters (see chop_str).
2026 sub format_author_html {
2027         my $tag = shift;
2028         my $co = shift;
2029         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2030         return "<$tag class=\"author\">" .
2031                format_search_author($co->{'author_name'}, "author",
2032                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2033                        $author) .
2034                "</$tag>";
2035 }
2036
2037 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2038 sub format_git_diff_header_line {
2039         my $line = shift;
2040         my $diffinfo = shift;
2041         my ($from, $to) = @_;
2042
2043         if ($diffinfo->{'nparents'}) {
2044                 # combined diff
2045                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2046                 if ($to->{'href'}) {
2047                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2048                                          esc_path($to->{'file'}));
2049                 } else { # file was deleted (no href)
2050                         $line .= esc_path($to->{'file'});
2051                 }
2052         } else {
2053                 # "ordinary" diff
2054                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2055                 if ($from->{'href'}) {
2056                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2057                                          'a/' . esc_path($from->{'file'}));
2058                 } else { # file was added (no href)
2059                         $line .= 'a/' . esc_path($from->{'file'});
2060                 }
2061                 $line .= ' ';
2062                 if ($to->{'href'}) {
2063                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2064                                          'b/' . esc_path($to->{'file'}));
2065                 } else { # file was deleted
2066                         $line .= 'b/' . esc_path($to->{'file'});
2067                 }
2068         }
2069
2070         return "<div class=\"diff header\">$line</div>\n";
2071 }
2072
2073 # format extended diff header line, before patch itself
2074 sub format_extended_diff_header_line {
2075         my $line = shift;
2076         my $diffinfo = shift;
2077         my ($from, $to) = @_;
2078
2079         # match <path>
2080         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2081                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2082                                        esc_path($from->{'file'}));
2083         }
2084         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2085                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2086                                  esc_path($to->{'file'}));
2087         }
2088         # match single <mode>
2089         if ($line =~ m/\s(\d{6})$/) {
2090                 $line .= '<span class="info"> (' .
2091                          file_type_long($1) .
2092                          ')</span>';
2093         }
2094         # match <hash>
2095         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2096                 # can match only for combined diff
2097                 $line = 'index ';
2098                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2099                         if ($from->{'href'}[$i]) {
2100                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2101                                                   -class=>"hash"},
2102                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2103                         } else {
2104                                 $line .= '0' x 7;
2105                         }
2106                         # separator
2107                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2108                 }
2109                 $line .= '..';
2110                 if ($to->{'href'}) {
2111                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2112                                          substr($diffinfo->{'to_id'},0,7));
2113                 } else {
2114                         $line .= '0' x 7;
2115                 }
2116
2117         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2118                 # can match only for ordinary diff
2119                 my ($from_link, $to_link);
2120                 if ($from->{'href'}) {
2121                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2122                                              substr($diffinfo->{'from_id'},0,7));
2123                 } else {
2124                         $from_link = '0' x 7;
2125                 }
2126                 if ($to->{'href'}) {
2127                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2128                                            substr($diffinfo->{'to_id'},0,7));
2129                 } else {
2130                         $to_link = '0' x 7;
2131                 }
2132                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2133                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2134         }
2135
2136         return $line . "<br/>\n";
2137 }
2138
2139 # format from-file/to-file diff header
2140 sub format_diff_from_to_header {
2141         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2142         my $line;
2143         my $result = '';
2144
2145         $line = $from_line;
2146         #assert($line =~ m/^---/) if DEBUG;
2147         # no extra formatting for "^--- /dev/null"
2148         if (! $diffinfo->{'nparents'}) {
2149                 # ordinary (single parent) diff
2150                 if ($line =~ m!^--- "?a/!) {
2151                         if ($from->{'href'}) {
2152                                 $line = '--- a/' .
2153                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2154                                                 esc_path($from->{'file'}));
2155                         } else {
2156                                 $line = '--- a/' .
2157                                         esc_path($from->{'file'});
2158                         }
2159                 }
2160                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2161
2162         } else {
2163                 # combined diff (merge commit)
2164                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2165                         if ($from->{'href'}[$i]) {
2166                                 $line = '--- ' .
2167                                         $cgi->a({-href=>href(action=>"blobdiff",
2168                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2169                                                              hash_parent_base=>$parents[$i],
2170                                                              file_parent=>$from->{'file'}[$i],
2171                                                              hash=>$diffinfo->{'to_id'},
2172                                                              hash_base=>$hash,
2173                                                              file_name=>$to->{'file'}),
2174                                                  -class=>"path",
2175                                                  -title=>"diff" . ($i+1)},
2176                                                 $i+1) .
2177                                         '/' .
2178                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2179                                                 esc_path($from->{'file'}[$i]));
2180                         } else {
2181                                 $line = '--- /dev/null';
2182                         }
2183                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2184                 }
2185         }
2186
2187         $line = $to_line;
2188         #assert($line =~ m/^\+\+\+/) if DEBUG;
2189         # no extra formatting for "^+++ /dev/null"
2190         if ($line =~ m!^\+\+\+ "?b/!) {
2191                 if ($to->{'href'}) {
2192                         $line = '+++ b/' .
2193                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2194                                         esc_path($to->{'file'}));
2195                 } else {
2196                         $line = '+++ b/' .
2197                                 esc_path($to->{'file'});
2198                 }
2199         }
2200         $result .= qq!<div class="diff to_file">$line</div>\n!;
2201
2202         return $result;
2203 }
2204
2205 # create note for patch simplified by combined diff
2206 sub format_diff_cc_simplified {
2207         my ($diffinfo, @parents) = @_;
2208         my $result = '';
2209
2210         $result .= "<div class=\"diff header\">" .
2211                    "diff --cc ";
2212         if (!is_deleted($diffinfo)) {
2213                 $result .= $cgi->a({-href => href(action=>"blob",
2214                                                   hash_base=>$hash,
2215                                                   hash=>$diffinfo->{'to_id'},
2216                                                   file_name=>$diffinfo->{'to_file'}),
2217                                     -class => "path"},
2218                                    esc_path($diffinfo->{'to_file'}));
2219         } else {
2220                 $result .= esc_path($diffinfo->{'to_file'});
2221         }
2222         $result .= "</div>\n" . # class="diff header"
2223                    "<div class=\"diff nodifferences\">" .
2224                    "Simple merge" .
2225                    "</div>\n"; # class="diff nodifferences"
2226
2227         return $result;
2228 }
2229
2230 sub diff_line_class {
2231         my ($line, $from, $to) = @_;
2232
2233         # ordinary diff
2234         my $num_sign = 1;
2235         # combined diff
2236         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2237                 $num_sign = scalar @{$from->{'href'}};
2238         }
2239
2240         my @diff_line_classifier = (
2241                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2242                 { regexp => qr/^\\/,               class => "incomplete"  },
2243                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2244                 # classifier for context must come before classifier add/rem,
2245                 # or we would have to use more complicated regexp, for example
2246                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2247                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2248                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2249         );
2250         for my $clsfy (@diff_line_classifier) {
2251                 return $clsfy->{'class'}
2252                         if ($line =~ $clsfy->{'regexp'});
2253         }
2254
2255         # fallback
2256         return "";
2257 }
2258
2259 # assumes that $from and $to are defined and correctly filled,
2260 # and that $line holds a line of chunk header for unified diff
2261 sub format_unidiff_chunk_header {
2262         my ($line, $from, $to) = @_;
2263
2264         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2265                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2266
2267         $from_lines = 0 unless defined $from_lines;
2268         $to_lines   = 0 unless defined $to_lines;
2269
2270         if ($from->{'href'}) {
2271                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2272                                      -class=>"list"}, $from_text);
2273         }
2274         if ($to->{'href'}) {
2275                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2276                                      -class=>"list"}, $to_text);
2277         }
2278         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2279                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2280         return $line;
2281 }
2282
2283 # assumes that $from and $to are defined and correctly filled,
2284 # and that $line holds a line of chunk header for combined diff
2285 sub format_cc_diff_chunk_header {
2286         my ($line, $from, $to) = @_;
2287
2288         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2289         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2290
2291         @from_text = split(' ', $ranges);
2292         for (my $i = 0; $i < @from_text; ++$i) {
2293                 ($from_start[$i], $from_nlines[$i]) =
2294                         (split(',', substr($from_text[$i], 1)), 0);
2295         }
2296
2297         $to_text   = pop @from_text;
2298         $to_start  = pop @from_start;
2299         $to_nlines = pop @from_nlines;
2300
2301         $line = "<span class=\"chunk_info\">$prefix ";
2302         for (my $i = 0; $i < @from_text; ++$i) {
2303                 if ($from->{'href'}[$i]) {
2304                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2305                                           -class=>"list"}, $from_text[$i]);
2306                 } else {
2307                         $line .= $from_text[$i];
2308                 }
2309                 $line .= " ";
2310         }
2311         if ($to->{'href'}) {
2312                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2313                                   -class=>"list"}, $to_text);
2314         } else {
2315                 $line .= $to_text;
2316         }
2317         $line .= " $prefix</span>" .
2318                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2319         return $line;
2320 }
2321
2322 # process patch (diff) line (not to be used for diff headers),
2323 # returning class and HTML-formatted (but not wrapped) line
2324 sub process_diff_line {
2325         my $line = shift;
2326         my ($from, $to) = @_;
2327
2328         my $diff_class = diff_line_class($line, $from, $to);
2329
2330         chomp $line;
2331         $line = untabify($line);
2332
2333         if ($from && $to && $line =~ m/^\@{2} /) {
2334                 $line = format_unidiff_chunk_header($line, $from, $to);
2335                 return $diff_class, $line;
2336
2337         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2338                 $line = format_cc_diff_chunk_header($line, $from, $to);
2339                 return $diff_class, $line;
2340
2341         }
2342         return $diff_class, esc_html($line, -nbsp=>1);
2343 }
2344
2345 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2346 # linked.  Pass the hash of the tree/commit to snapshot.
2347 sub format_snapshot_links {
2348         my ($hash) = @_;
2349         my $num_fmts = @snapshot_fmts;
2350         if ($num_fmts > 1) {
2351                 # A parenthesized list of links bearing format names.
2352                 # e.g. "snapshot (_tar.gz_ _zip_)"
2353                 return "snapshot (" . join(' ', map
2354                         $cgi->a({
2355                                 -href => href(
2356                                         action=>"snapshot",
2357                                         hash=>$hash,
2358                                         snapshot_format=>$_
2359                                 )
2360                         }, $known_snapshot_formats{$_}{'display'})
2361                 , @snapshot_fmts) . ")";
2362         } elsif ($num_fmts == 1) {
2363                 # A single "snapshot" link whose tooltip bears the format name.
2364                 # i.e. "_snapshot_"
2365                 my ($fmt) = @snapshot_fmts;
2366                 return
2367                         $cgi->a({
2368                                 -href => href(
2369                                         action=>"snapshot",
2370                                         hash=>$hash,
2371                                         snapshot_format=>$fmt
2372                                 ),
2373                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2374                         }, "snapshot");
2375         } else { # $num_fmts == 0
2376                 return undef;
2377         }
2378 }
2379
2380 ## ......................................................................
2381 ## functions returning values to be passed, perhaps after some
2382 ## transformation, to other functions; e.g. returning arguments to href()
2383
2384 # returns hash to be passed to href to generate gitweb URL
2385 # in -title key it returns description of link
2386 sub get_feed_info {
2387         my $format = shift || 'Atom';
2388         my %res = (action => lc($format));
2389
2390         # feed links are possible only for project views
2391         return unless (defined $project);
2392         # some views should link to OPML, or to generic project feed,
2393         # or don't have specific feed yet (so they should use generic)
2394         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2395
2396         my $branch;
2397         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2398         # from tag links; this also makes possible to detect branch links
2399         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2400             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2401                 $branch = $1;
2402         }
2403         # find log type for feed description (title)
2404         my $type = 'log';
2405         if (defined $file_name) {
2406                 $type  = "history of $file_name";
2407                 $type .= "/" if ($action eq 'tree');
2408                 $type .= " on '$branch'" if (defined $branch);
2409         } else {
2410                 $type = "log of $branch" if (defined $branch);
2411         }
2412
2413         $res{-title} = $type;
2414         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2415         $res{'file_name'} = $file_name;
2416
2417         return %res;
2418 }
2419
2420 ## ----------------------------------------------------------------------
2421 ## git utility subroutines, invoking git commands
2422
2423 # returns path to the core git executable and the --git-dir parameter as list
2424 sub git_cmd {
2425         $number_of_git_cmds++;
2426         return $GIT, '--git-dir='.$git_dir;
2427 }
2428
2429 # quote the given arguments for passing them to the shell
2430 # quote_command("command", "arg 1", "arg with ' and ! characters")
2431 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2432 # Try to avoid using this function wherever possible.
2433 sub quote_command {
2434         return join(' ',
2435                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2436 }
2437
2438 # get HEAD ref of given project as hash
2439 sub git_get_head_hash {
2440         return git_get_full_hash(shift, 'HEAD');
2441 }
2442
2443 sub git_get_full_hash {
2444         return git_get_hash(@_);
2445 }
2446
2447 sub git_get_short_hash {
2448         return git_get_hash(@_, '--short=7');
2449 }
2450
2451 sub git_get_hash {
2452         my ($project, $hash, @options) = @_;
2453         my $o_git_dir = $git_dir;
2454         my $retval = undef;
2455         $git_dir = "$projectroot/$project";
2456         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2457             '--verify', '-q', @options, $hash) {
2458                 $retval = <$fd>;
2459                 chomp $retval if defined $retval;
2460                 close $fd;
2461         }
2462         if (defined $o_git_dir) {
2463                 $git_dir = $o_git_dir;
2464         }
2465         return $retval;
2466 }
2467
2468 # get type of given object
2469 sub git_get_type {
2470         my $hash = shift;
2471
2472         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2473         my $type = <$fd>;
2474         close $fd or return;
2475         chomp $type;
2476         return $type;
2477 }
2478
2479 # repository configuration
2480 our $config_file = '';
2481 our %config;
2482
2483 # store multiple values for single key as anonymous array reference
2484 # single values stored directly in the hash, not as [ <value> ]
2485 sub hash_set_multi {
2486         my ($hash, $key, $value) = @_;
2487
2488         if (!exists $hash->{$key}) {
2489                 $hash->{$key} = $value;
2490         } elsif (!ref $hash->{$key}) {
2491                 $hash->{$key} = [ $hash->{$key}, $value ];
2492         } else {
2493                 push @{$hash->{$key}}, $value;
2494         }
2495 }
2496
2497 # return hash of git project configuration
2498 # optionally limited to some section, e.g. 'gitweb'
2499 sub git_parse_project_config {
2500         my $section_regexp = shift;
2501         my %config;
2502
2503         local $/ = "\0";
2504
2505         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2506                 or return;
2507
2508         while (my $keyval = <$fh>) {
2509                 chomp $keyval;
2510                 my ($key, $value) = split(/\n/, $keyval, 2);
2511
2512                 hash_set_multi(\%config, $key, $value)
2513                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2514         }
2515         close $fh;
2516
2517         return %config;
2518 }
2519
2520 # convert config value to boolean: 'true' or 'false'
2521 # no value, number > 0, 'true' and 'yes' values are true
2522 # rest of values are treated as false (never as error)
2523 sub config_to_bool {
2524         my $val = shift;
2525
2526         return 1 if !defined $val;             # section.key
2527
2528         # strip leading and trailing whitespace
2529         $val =~ s/^\s+//;
2530         $val =~ s/\s+$//;
2531
2532         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2533                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2534 }
2535
2536 # convert config value to simple decimal number
2537 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2538 # to be multiplied by 1024, 1048576, or 1073741824
2539 sub config_to_int {
2540         my $val = shift;
2541
2542         # strip leading and trailing whitespace
2543         $val =~ s/^\s+//;
2544         $val =~ s/\s+$//;
2545
2546         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2547                 $unit = lc($unit);
2548                 # unknown unit is treated as 1
2549                 return $num * ($unit eq 'g' ? 1073741824 :
2550                                $unit eq 'm' ?    1048576 :
2551                                $unit eq 'k' ?       1024 : 1);
2552         }
2553         return $val;
2554 }
2555
2556 # convert config value to array reference, if needed
2557 sub config_to_multi {
2558         my $val = shift;
2559
2560         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2561 }
2562
2563 sub git_get_project_config {
2564         my ($key, $type) = @_;
2565
2566         return unless defined $git_dir;
2567
2568         # key sanity check
2569         return unless ($key);
2570         # only subsection, if exists, is case sensitive,
2571         # and not lowercased by 'git config -z -l'
2572         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2573                 $key = join(".", lc($hi), $mi, lc($lo));
2574         } else {
2575                 $key = lc($key);
2576         }
2577         $key =~ s/^gitweb\.//;
2578         return if ($key =~ m/\W/);
2579
2580         # type sanity check
2581         if (defined $type) {
2582                 $type =~ s/^--//;
2583                 $type = undef
2584                         unless ($type eq 'bool' || $type eq 'int');
2585         }
2586
2587         # get config
2588         if (!defined $config_file ||
2589             $config_file ne "$git_dir/config") {
2590                 %config = git_parse_project_config('gitweb');
2591                 $config_file = "$git_dir/config";
2592         }
2593
2594         # check if config variable (key) exists
2595         return unless exists $config{"gitweb.$key"};
2596
2597         # ensure given type
2598         if (!defined $type) {
2599                 return $config{"gitweb.$key"};
2600         } elsif ($type eq 'bool') {
2601                 # backward compatibility: 'git config --bool' returns true/false
2602                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2603         } elsif ($type eq 'int') {
2604                 return config_to_int($config{"gitweb.$key"});
2605         }
2606         return $config{"gitweb.$key"};
2607 }
2608
2609 # get hash of given path at given ref
2610 sub git_get_hash_by_path {
2611         my $base = shift;
2612         my $path = shift || return undef;
2613         my $type = shift;
2614
2615         $path =~ s,/+$,,;
2616
2617         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2618                 or die_error(500, "Open git-ls-tree failed");
2619         my $line = <$fd>;
2620         close $fd or return undef;
2621
2622         if (!defined $line) {
2623                 # there is no tree or hash given by $path at $base
2624                 return undef;
2625         }
2626
2627         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2628         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2629         if (defined $type && $type ne $2) {
2630                 # type doesn't match
2631                 return undef;
2632         }
2633         return $3;
2634 }
2635
2636 # get path of entry with given hash at given tree-ish (ref)
2637 # used to get 'from' filename for combined diff (merge commit) for renames
2638 sub git_get_path_by_hash {
2639         my $base = shift || return;
2640         my $hash = shift || return;
2641
2642         local $/ = "\0";
2643
2644         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2645                 or return undef;
2646         while (my $line = <$fd>) {
2647                 chomp $line;
2648
2649                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2650                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2651                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2652                         close $fd;
2653                         return $1;
2654                 }
2655         }
2656         close $fd;
2657         return undef;
2658 }
2659
2660 ## ......................................................................
2661 ## git utility functions, directly accessing git repository
2662
2663 # get the value of config variable either from file named as the variable
2664 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2665 # configuration variable in the repository config file.
2666 sub git_get_file_or_project_config {
2667         my ($path, $name) = @_;
2668
2669         $git_dir = "$projectroot/$path";
2670         open my $fd, '<', "$git_dir/$name"
2671                 or return git_get_project_config($name);
2672         my $conf = <$fd>;
2673         close $fd;
2674         if (defined $conf) {
2675                 chomp $conf;
2676         }
2677         return $conf;
2678 }
2679
2680 sub git_get_project_description {
2681         my $path = shift;
2682         return git_get_file_or_project_config($path, 'description');
2683 }
2684
2685 sub git_get_project_category {
2686         my $path = shift;
2687         return git_get_file_or_project_config($path, 'category');
2688 }
2689
2690
2691 # supported formats:
2692 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2693 #   - if its contents is a number, use it as tag weight,
2694 #   - otherwise add a tag with weight 1
2695 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2696 #   the same value multiple times increases tag weight
2697 # * `gitweb.ctag' multi-valued repo config variable
2698 sub git_get_project_ctags {
2699         my $project = shift;
2700         my $ctags = {};
2701
2702         $git_dir = "$projectroot/$project";
2703         if (opendir my $dh, "$git_dir/ctags") {
2704                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2705                 foreach my $tagfile (@files) {
2706                         open my $ct, '<', $tagfile
2707                                 or next;
2708                         my $val = <$ct>;
2709                         chomp $val if $val;
2710                         close $ct;
2711
2712                         (my $ctag = $tagfile) =~ s#.*/##;
2713                         if ($val =~ /^\d+$/) {
2714                                 $ctags->{$ctag} = $val;
2715                         } else {
2716                                 $ctags->{$ctag} = 1;
2717                         }
2718                 }
2719                 closedir $dh;
2720
2721         } elsif (open my $fh, '<', "$git_dir/ctags") {
2722                 while (my $line = <$fh>) {
2723                         chomp $line;
2724                         $ctags->{$line}++ if $line;
2725                 }
2726                 close $fh;
2727
2728         } else {
2729                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2730                 foreach my $tag (@$taglist) {
2731                         $ctags->{$tag}++;
2732                 }
2733         }
2734
2735         return $ctags;
2736 }
2737
2738 # return hash, where keys are content tags ('ctags'),
2739 # and values are sum of weights of given tag in every project
2740 sub git_gather_all_ctags {
2741         my $projects = shift;
2742         my $ctags = {};
2743
2744         foreach my $p (@$projects) {
2745                 foreach my $ct (keys %{$p->{'ctags'}}) {
2746                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2747                 }
2748         }
2749
2750         return $ctags;
2751 }
2752
2753 sub git_populate_project_tagcloud {
2754         my $ctags = shift;
2755
2756         # First, merge different-cased tags; tags vote on casing
2757         my %ctags_lc;
2758         foreach (keys %$ctags) {
2759                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2760                 if (not $ctags_lc{lc $_}->{topcount}
2761                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2762                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2763                         $ctags_lc{lc $_}->{topname} = $_;
2764                 }
2765         }
2766
2767         my $cloud;
2768         my $matched = $cgi->param('by_tag');
2769         if (eval { require HTML::TagCloud; 1; }) {
2770                 $cloud = HTML::TagCloud->new;
2771                 foreach my $ctag (sort keys %ctags_lc) {
2772                         # Pad the title with spaces so that the cloud looks
2773                         # less crammed.
2774                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2775                         $title =~ s/ /&nbsp;/g;
2776                         $title =~ s/^/&nbsp;/g;
2777                         $title =~ s/$/&nbsp;/g;
2778                         if (defined $matched && $matched eq $ctag) {
2779                                 $title = qq(<span class="match">$title</span>);
2780                         }
2781                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2782                                     $ctags_lc{$ctag}->{count});
2783                 }
2784         } else {
2785                 $cloud = {};
2786                 foreach my $ctag (keys %ctags_lc) {
2787                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2788                         if (defined $matched && $matched eq $ctag) {
2789                                 $title = qq(<span class="match">$title</span>);
2790                         }
2791                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2792                         $cloud->{$ctag}{ctag} =
2793                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2794                 }
2795         }
2796         return $cloud;
2797 }
2798
2799 sub git_show_project_tagcloud {
2800         my ($cloud, $count) = @_;
2801         if (ref $cloud eq 'HTML::TagCloud') {
2802                 return $cloud->html_and_css($count);
2803         } else {
2804                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2805                 return
2806                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2807                         join (', ', map {
2808                                 $cloud->{$_}->{'ctag'}
2809                         } splice(@tags, 0, $count)) .
2810                         '</div>';
2811         }
2812 }
2813
2814 sub git_get_project_url_list {
2815         my $path = shift;
2816
2817         $git_dir = "$projectroot/$path";
2818         open my $fd, '<', "$git_dir/cloneurl"
2819                 or return wantarray ?
2820                 @{ config_to_multi(git_get_project_config('url')) } :
2821                    config_to_multi(git_get_project_config('url'));
2822         my @git_project_url_list = map { chomp; $_ } <$fd>;
2823         close $fd;
2824
2825         return wantarray ? @git_project_url_list : \@git_project_url_list;
2826 }
2827
2828 sub git_get_projects_list {
2829         my $filter = shift || '';
2830         my @list;
2831
2832         $filter =~ s/\.git$//;
2833
2834         if (-d $projects_list) {
2835                 # search in directory
2836                 my $dir = $projects_list;
2837                 # remove the trailing "/"
2838                 $dir =~ s!/+$!!;
2839                 my $pfxlen = length("$dir");
2840                 my $pfxdepth = ($dir =~ tr!/!!);
2841                 # when filtering, search only given subdirectory
2842                 if ($filter) {
2843                         $dir .= "/$filter";
2844                         $dir =~ s!/+$!!;
2845                 }
2846
2847                 File::Find::find({
2848                         follow_fast => 1, # follow symbolic links
2849                         follow_skip => 2, # ignore duplicates
2850                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2851                         wanted => sub {
2852                                 # global variables
2853                                 our $project_maxdepth;
2854                                 our $projectroot;
2855                                 # skip project-list toplevel, if we get it.
2856                                 return if (m!^[/.]$!);
2857                                 # only directories can be git repositories
2858                                 return unless (-d $_);
2859                                 # don't traverse too deep (Find is super slow on os x)
2860                                 # $project_maxdepth excludes depth of $projectroot
2861                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2862                                         $File::Find::prune = 1;
2863                                         return;
2864                                 }
2865
2866                                 my $path = substr($File::Find::name, $pfxlen + 1);
2867                                 # we check related file in $projectroot
2868                                 if (check_export_ok("$projectroot/$path")) {
2869                                         push @list, { path => $path };
2870                                         $File::Find::prune = 1;
2871                                 }
2872                         },
2873                 }, "$dir");
2874
2875         } elsif (-f $projects_list) {
2876                 # read from file(url-encoded):
2877                 # 'git%2Fgit.git Linus+Torvalds'
2878                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2879                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2880                 open my $fd, '<', $projects_list or return;
2881         PROJECT:
2882                 while (my $line = <$fd>) {
2883                         chomp $line;
2884                         my ($path, $owner) = split ' ', $line;
2885                         $path = unescape($path);
2886                         $owner = unescape($owner);
2887                         if (!defined $path) {
2888                                 next;
2889                         }
2890                         # if $filter is rpovided, check if $path begins with $filter
2891                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2892                                 next;
2893                         }
2894                         if (check_export_ok("$projectroot/$path")) {
2895                                 my $pr = {
2896                                         path => $path,
2897                                         owner => to_utf8($owner),
2898                                 };
2899                                 push @list, $pr;
2900                         }
2901                 }
2902                 close $fd;
2903         }
2904         return @list;
2905 }
2906
2907 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2908 # as side effects it sets 'forks' field to list of forks for forked projects
2909 sub filter_forks_from_projects_list {
2910         my $projects = shift;
2911
2912         my %trie; # prefix tree of directories (path components)
2913         # generate trie out of those directories that might contain forks
2914         foreach my $pr (@$projects) {
2915                 my $path = $pr->{'path'};
2916                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2917                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2918                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2919                 next unless (-d "$projectroot/$path"); # containing directory exists
2920                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2921
2922                 # add to trie
2923                 my @dirs = split('/', $path);
2924                 # walk the trie, until either runs out of components or out of trie
2925                 my $ref = \%trie;
2926                 while (scalar @dirs &&
2927                        exists($ref->{$dirs[0]})) {
2928                         $ref = $ref->{shift @dirs};
2929                 }
2930                 # create rest of trie structure from rest of components
2931                 foreach my $dir (@dirs) {
2932                         $ref = $ref->{$dir} = {};
2933                 }
2934                 # create end marker, store $pr as a data
2935                 $ref->{''} = $pr if (!exists $ref->{''});
2936         }
2937
2938         # filter out forks, by finding shortest prefix match for paths
2939         my @filtered;
2940  PROJECT:
2941         foreach my $pr (@$projects) {
2942                 # trie lookup
2943                 my $ref = \%trie;
2944         DIR:
2945                 foreach my $dir (split('/', $pr->{'path'})) {
2946                         if (exists $ref->{''}) {
2947                                 # found [shortest] prefix, is a fork - skip it
2948                                 push @{$ref->{''}{'forks'}}, $pr;
2949                                 next PROJECT;
2950                         }
2951                         if (!exists $ref->{$dir}) {
2952                                 # not in trie, cannot have prefix, not a fork
2953                                 push @filtered, $pr;
2954                                 next PROJECT;
2955                         }
2956                         # If the dir is there, we just walk one step down the trie.
2957                         $ref = $ref->{$dir};
2958                 }
2959                 # we ran out of trie
2960                 # (shouldn't happen: it's either no match, or end marker)
2961                 push @filtered, $pr;
2962         }
2963
2964         return @filtered;
2965 }
2966
2967 # note: fill_project_list_info must be run first,
2968 # for 'descr_long' and 'ctags' to be filled
2969 sub search_projects_list {
2970         my ($projlist, %opts) = @_;
2971         my $tagfilter  = $opts{'tagfilter'};
2972         my $searchtext = $opts{'searchtext'};
2973
2974         return @$projlist
2975                 unless ($tagfilter || $searchtext);
2976
2977         my @projects;
2978  PROJECT:
2979         foreach my $pr (@$projlist) {
2980
2981                 if ($tagfilter) {
2982                         next unless ref($pr->{'ctags'}) eq 'HASH';
2983                         next unless
2984                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2985                 }
2986
2987                 if ($searchtext) {
2988                         next unless
2989                                 $pr->{'path'} =~ /$searchtext/ ||
2990                                 $pr->{'descr_long'} =~ /$searchtext/;
2991                 }
2992
2993                 push @projects, $pr;
2994         }
2995
2996         return @projects;
2997 }
2998
2999 our $gitweb_project_owner = undef;
3000 sub git_get_project_list_from_file {
3001
3002         return if (defined $gitweb_project_owner);
3003
3004         $gitweb_project_owner = {};
3005         # read from file (url-encoded):
3006         # 'git%2Fgit.git Linus+Torvalds'
3007         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3008         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3009         if (-f $projects_list) {
3010                 open(my $fd, '<', $projects_list);
3011                 while (my $line = <$fd>) {
3012                         chomp $line;
3013                         my ($pr, $ow) = split ' ', $line;
3014                         $pr = unescape($pr);
3015                         $ow = unescape($ow);
3016                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3017                 }
3018                 close $fd;
3019         }
3020 }
3021
3022 sub git_get_project_owner {
3023         my $project = shift;
3024         my $owner;
3025
3026         return undef unless $project;
3027         $git_dir = "$projectroot/$project";
3028
3029         if (!defined $gitweb_project_owner) {
3030                 git_get_project_list_from_file();
3031         }
3032
3033         if (exists $gitweb_project_owner->{$project}) {
3034                 $owner = $gitweb_project_owner->{$project};
3035         }
3036         if (!defined $owner){
3037                 $owner = git_get_project_config('owner');
3038         }
3039         if (!defined $owner) {
3040                 $owner = get_file_owner("$git_dir");
3041         }
3042
3043         return $owner;
3044 }
3045
3046 sub git_get_last_activity {
3047         my ($path) = @_;
3048         my $fd;
3049
3050         $git_dir = "$projectroot/$path";
3051         open($fd, "-|", git_cmd(), 'for-each-ref',
3052              '--format=%(committer)',
3053              '--sort=-committerdate',
3054              '--count=1',
3055              'refs/heads') or return;
3056         my $most_recent = <$fd>;
3057         close $fd or return;
3058         if (defined $most_recent &&
3059             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3060                 my $timestamp = $1;
3061                 my $age = time - $timestamp;
3062                 return ($age, age_string($age));
3063         }
3064         return (undef, undef);
3065 }
3066
3067 # Implementation note: when a single remote is wanted, we cannot use 'git
3068 # remote show -n' because that command always work (assuming it's a remote URL
3069 # if it's not defined), and we cannot use 'git remote show' because that would
3070 # try to make a network roundtrip. So the only way to find if that particular
3071 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3072 # and when we find what we want.
3073 sub git_get_remotes_list {
3074         my $wanted = shift;
3075         my %remotes = ();
3076
3077         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3078         return unless $fd;
3079         while (my $remote = <$fd>) {
3080                 chomp $remote;
3081                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3082                 next if $wanted and not $remote eq $wanted;
3083                 my ($url, $key) = ($1, $2);
3084
3085                 $remotes{$remote} ||= { 'heads' => () };
3086                 $remotes{$remote}{$key} = $url;
3087         }
3088         close $fd or return;
3089         return wantarray ? %remotes : \%remotes;
3090 }
3091
3092 # Takes a hash of remotes as first parameter and fills it by adding the
3093 # available remote heads for each of the indicated remotes.
3094 sub fill_remote_heads {
3095         my $remotes = shift;
3096         my @heads = map { "remotes/$_" } keys %$remotes;
3097         my @remoteheads = git_get_heads_list(undef, @heads);
3098         foreach my $remote (keys %$remotes) {
3099                 $remotes->{$remote}{'heads'} = [ grep {
3100                         $_->{'name'} =~ s!^$remote/!!
3101                         } @remoteheads ];
3102         }
3103 }
3104
3105 sub git_get_references {
3106         my $type = shift || "";
3107         my %refs;
3108         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3109         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3110         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3111                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3112                 or return;
3113
3114         while (my $line = <$fd>) {
3115                 chomp $line;
3116                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3117                         if (defined $refs{$1}) {
3118                                 push @{$refs{$1}}, $2;
3119                         } else {
3120                                 $refs{$1} = [ $2 ];
3121                         }
3122                 }
3123         }
3124         close $fd or return;
3125         return \%refs;
3126 }
3127
3128 sub git_get_rev_name_tags {
3129         my $hash = shift || return undef;
3130
3131         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3132                 or return;
3133         my $name_rev = <$fd>;
3134         close $fd;
3135
3136         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3137                 return $1;
3138         } else {
3139                 # catches also '$hash undefined' output
3140                 return undef;
3141         }
3142 }
3143
3144 ## ----------------------------------------------------------------------
3145 ## parse to hash functions
3146
3147 sub parse_date {
3148         my $epoch = shift;
3149         my $tz = shift || "-0000";
3150
3151         my %date;
3152         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3153         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3154         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3155         $date{'hour'} = $hour;
3156         $date{'minute'} = $min;
3157         $date{'mday'} = $mday;
3158         $date{'day'} = $days[$wday];
3159         $date{'month'} = $months[$mon];
3160         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3161                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3162         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3163                              $mday, $months[$mon], $hour ,$min;
3164         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3165                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3166
3167         my ($tz_sign, $tz_hour, $tz_min) =
3168                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3169         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3170         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3171         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3172         $date{'hour_local'} = $hour;
3173         $date{'minute_local'} = $min;
3174         $date{'tz_local'} = $tz;
3175         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3176                                   1900+$year, $mon+1, $mday,
3177                                   $hour, $min, $sec, $tz);
3178         return %date;
3179 }
3180
3181 sub parse_tag {
3182         my $tag_id = shift;
3183         my %tag;
3184         my @comment;
3185
3186         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3187         $tag{'id'} = $tag_id;
3188         while (my $line = <$fd>) {
3189                 chomp $line;
3190                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3191                         $tag{'object'} = $1;
3192                 } elsif ($line =~ m/^type (.+)$/) {
3193                         $tag{'type'} = $1;
3194                 } elsif ($line =~ m/^tag (.+)$/) {
3195                         $tag{'name'} = $1;
3196                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3197                         $tag{'author'} = $1;
3198                         $tag{'author_epoch'} = $2;
3199                         $tag{'author_tz'} = $3;
3200                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3201                                 $tag{'author_name'}  = $1;
3202                                 $tag{'author_email'} = $2;
3203                         } else {
3204                                 $tag{'author_name'} = $tag{'author'};
3205                         }
3206                 } elsif ($line =~ m/--BEGIN/) {
3207                         push @comment, $line;
3208                         last;
3209                 } elsif ($line eq "") {
3210                         last;
3211                 }
3212         }
3213         push @comment, <$fd>;
3214         $tag{'comment'} = \@comment;
3215         close $fd or return;
3216         if (!defined $tag{'name'}) {
3217                 return
3218         };
3219         return %tag
3220 }
3221
3222 sub parse_commit_text {
3223         my ($commit_text, $withparents) = @_;
3224         my @commit_lines = split '\n', $commit_text;
3225         my %co;
3226
3227         pop @commit_lines; # Remove '\0'
3228
3229         if (! @commit_lines) {
3230                 return;
3231         }
3232
3233         my $header = shift @commit_lines;
3234         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3235                 return;
3236         }
3237         ($co{'id'}, my @parents) = split ' ', $header;
3238         while (my $line = shift @commit_lines) {
3239                 last if $line eq "\n";
3240                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3241                         $co{'tree'} = $1;
3242                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3243                         push @parents, $1;
3244                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3245                         $co{'author'} = to_utf8($1);
3246                         $co{'author_epoch'} = $2;
3247                         $co{'author_tz'} = $3;
3248                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3249                                 $co{'author_name'}  = $1;
3250                                 $co{'author_email'} = $2;
3251                         } else {
3252                                 $co{'author_name'} = $co{'author'};
3253                         }
3254                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3255                         $co{'committer'} = to_utf8($1);
3256                         $co{'committer_epoch'} = $2;
3257                         $co{'committer_tz'} = $3;
3258                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3259                                 $co{'committer_name'}  = $1;
3260                                 $co{'committer_email'} = $2;
3261                         } else {
3262                                 $co{'committer_name'} = $co{'committer'};
3263                         }
3264                 }
3265         }
3266         if (!defined $co{'tree'}) {
3267                 return;
3268         };
3269         $co{'parents'} = \@parents;
3270         $co{'parent'} = $parents[0];
3271
3272         foreach my $title (@commit_lines) {
3273                 $title =~ s/^    //;
3274                 if ($title ne "") {
3275                         $co{'title'} = chop_str($title, 80, 5);
3276                         # remove leading stuff of merges to make the interesting part visible
3277                         if (length($title) > 50) {
3278                                 $title =~ s/^Automatic //;
3279                                 $title =~ s/^merge (of|with) /Merge ... /i;
3280                                 if (length($title) > 50) {
3281                                         $title =~ s/(http|rsync):\/\///;
3282                                 }
3283                                 if (length($title) > 50) {
3284                                         $title =~ s/(master|www|rsync)\.//;
3285                                 }
3286                                 if (length($title) > 50) {
3287                                         $title =~ s/kernel.org:?//;
3288                                 }
3289                                 if (length($title) > 50) {
3290                                         $title =~ s/\/pub\/scm//;
3291                                 }
3292                         }
3293                         $co{'title_short'} = chop_str($title, 50, 5);
3294                         last;
3295                 }
3296         }
3297         if (! defined $co{'title'} || $co{'title'} eq "") {
3298                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3299         }
3300         # remove added spaces
3301         foreach my $line (@commit_lines) {
3302                 $line =~ s/^    //;
3303         }
3304         $co{'comment'} = \@commit_lines;
3305
3306         my $age = time - $co{'committer_epoch'};
3307         $co{'age'} = $age;
3308         $co{'age_string'} = age_string($age);
3309         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3310         if ($age > 60*60*24*7*2) {
3311                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3312                 $co{'age_string_age'} = $co{'age_string'};
3313         } else {
3314                 $co{'age_string_date'} = $co{'age_string'};
3315                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3316         }
3317         return %co;
3318 }
3319
3320 sub parse_commit {
3321         my ($commit_id) = @_;
3322         my %co;
3323
3324         local $/ = "\0";
3325
3326         open my $fd, "-|", git_cmd(), "rev-list",
3327                 "--parents",
3328                 "--header",
3329                 "--max-count=1",
3330                 $commit_id,
3331                 "--",
3332                 or die_error(500, "Open git-rev-list failed");
3333         %co = parse_commit_text(<$fd>, 1);
3334         close $fd;
3335
3336         return %co;
3337 }
3338
3339 sub parse_commits {
3340         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3341         my @cos;
3342
3343         $maxcount ||= 1;
3344         $skip ||= 0;
3345
3346         local $/ = "\0";
3347
3348         open my $fd, "-|", git_cmd(), "rev-list",
3349                 "--header",
3350                 @args,
3351                 ("--max-count=" . $maxcount),
3352                 ("--skip=" . $skip),
3353                 @extra_options,
3354                 $commit_id,
3355                 "--",
3356                 ($filename ? ($filename) : ())
3357                 or die_error(500, "Open git-rev-list failed");
3358         while (my $line = <$fd>) {
3359                 my %co = parse_commit_text($line);
3360                 push @cos, \%co;
3361         }
3362         close $fd;
3363
3364         return wantarray ? @cos : \@cos;
3365 }
3366
3367 # parse line of git-diff-tree "raw" output
3368 sub parse_difftree_raw_line {
3369         my $line = shift;
3370         my %res;
3371
3372         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3373         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3374         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3375                 $res{'from_mode'} = $1;
3376                 $res{'to_mode'} = $2;
3377                 $res{'from_id'} = $3;
3378                 $res{'to_id'} = $4;
3379                 $res{'status'} = $5;
3380                 $res{'similarity'} = $6;
3381                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3382                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3383                 } else {
3384                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3385                 }
3386         }
3387         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3388         # combined diff (for merge commit)
3389         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3390                 $res{'nparents'}  = length($1);
3391                 $res{'from_mode'} = [ split(' ', $2) ];
3392                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3393                 $res{'from_id'} = [ split(' ', $3) ];
3394                 $res{'to_id'} = pop @{$res{'from_id'}};
3395                 $res{'status'} = [ split('', $4) ];
3396                 $res{'to_file'} = unquote($5);
3397         }
3398         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3399         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3400                 $res{'commit'} = $1;
3401         }
3402
3403         return wantarray ? %res : \%res;
3404 }
3405
3406 # wrapper: return parsed line of git-diff-tree "raw" output
3407 # (the argument might be raw line, or parsed info)
3408 sub parsed_difftree_line {
3409         my $line_or_ref = shift;
3410
3411         if (ref($line_or_ref) eq "HASH") {
3412                 # pre-parsed (or generated by hand)
3413                 return $line_or_ref;
3414         } else {
3415                 return parse_difftree_raw_line($line_or_ref);
3416         }
3417 }
3418
3419 # parse line of git-ls-tree output
3420 sub parse_ls_tree_line {
3421         my $line = shift;
3422         my %opts = @_;
3423         my %res;
3424
3425         if ($opts{'-l'}) {
3426                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3427                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3428
3429                 $res{'mode'} = $1;
3430                 $res{'type'} = $2;
3431                 $res{'hash'} = $3;
3432                 $res{'size'} = $4;
3433                 if ($opts{'-z'}) {
3434                         $res{'name'} = $5;
3435                 } else {
3436                         $res{'name'} = unquote($5);
3437                 }
3438         } else {
3439                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3440                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3441
3442                 $res{'mode'} = $1;
3443                 $res{'type'} = $2;
3444                 $res{'hash'} = $3;
3445                 if ($opts{'-z'}) {
3446                         $res{'name'} = $4;
3447                 } else {
3448                         $res{'name'} = unquote($4);
3449                 }
3450         }
3451
3452         return wantarray ? %res : \%res;
3453 }
3454
3455 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3456 sub parse_from_to_diffinfo {
3457         my ($diffinfo, $from, $to, @parents) = @_;
3458
3459         if ($diffinfo->{'nparents'}) {
3460                 # combined diff
3461                 $from->{'file'} = [];
3462                 $from->{'href'} = [];
3463                 fill_from_file_info($diffinfo, @parents)
3464                         unless exists $diffinfo->{'from_file'};
3465                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3466                         $from->{'file'}[$i] =
3467                                 defined $diffinfo->{'from_file'}[$i] ?
3468                                         $diffinfo->{'from_file'}[$i] :
3469                                         $diffinfo->{'to_file'};
3470                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3471                                 $from->{'href'}[$i] = href(action=>"blob",
3472                                                            hash_base=>$parents[$i],
3473                                                            hash=>$diffinfo->{'from_id'}[$i],
3474                                                            file_name=>$from->{'file'}[$i]);
3475                         } else {
3476                                 $from->{'href'}[$i] = undef;
3477                         }
3478                 }
3479         } else {
3480                 # ordinary (not combined) diff
3481                 $from->{'file'} = $diffinfo->{'from_file'};
3482                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3483                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3484                                                hash=>$diffinfo->{'from_id'},
3485                                                file_name=>$from->{'file'});
3486                 } else {
3487                         delete $from->{'href'};
3488                 }
3489         }
3490
3491         $to->{'file'} = $diffinfo->{'to_file'};
3492         if (!is_deleted($diffinfo)) { # file exists in result
3493                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3494                                      hash=>$diffinfo->{'to_id'},
3495                                      file_name=>$to->{'file'});
3496         } else {
3497                 delete $to->{'href'};
3498         }
3499 }
3500
3501 ## ......................................................................
3502 ## parse to array of hashes functions
3503
3504 sub git_get_heads_list {
3505         my ($limit, @classes) = @_;
3506         @classes = ('heads') unless @classes;
3507         my @patterns = map { "refs/$_" } @classes;
3508         my @headslist;
3509
3510         open my $fd, '-|', git_cmd(), 'for-each-ref',
3511                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3512                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3513                 @patterns
3514                 or return;
3515         while (my $line = <$fd>) {
3516                 my %ref_item;
3517
3518                 chomp $line;
3519                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3520                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3521                 my ($committer, $epoch, $tz) =
3522                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3523                 $ref_item{'fullname'}  = $name;
3524                 $name =~ s!^refs/(?:head|remote)s/!!;
3525
3526                 $ref_item{'name'}  = $name;
3527                 $ref_item{'id'}    = $hash;
3528                 $ref_item{'title'} = $title || '(no commit message)';
3529                 $ref_item{'epoch'} = $epoch;
3530                 if ($epoch) {
3531                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3532                 } else {
3533                         $ref_item{'age'} = "unknown";
3534                 }
3535
3536                 push @headslist, \%ref_item;
3537         }
3538         close $fd;
3539
3540         return wantarray ? @headslist : \@headslist;
3541 }
3542
3543 sub git_get_tags_list {
3544         my $limit = shift;
3545         my @tagslist;
3546
3547         open my $fd, '-|', git_cmd(), 'for-each-ref',
3548                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3549                 '--format=%(objectname) %(objecttype) %(refname) '.
3550                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3551                 'refs/tags'
3552                 or return;
3553         while (my $line = <$fd>) {
3554                 my %ref_item;
3555
3556                 chomp $line;
3557                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3558                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3559                 my ($creator, $epoch, $tz) =
3560                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3561                 $ref_item{'fullname'} = $name;
3562                 $name =~ s!^refs/tags/!!;
3563
3564                 $ref_item{'type'} = $type;
3565                 $ref_item{'id'} = $id;
3566                 $ref_item{'name'} = $name;
3567                 if ($type eq "tag") {
3568                         $ref_item{'subject'} = $title;
3569                         $ref_item{'reftype'} = $reftype;
3570                         $ref_item{'refid'}   = $refid;
3571                 } else {
3572                         $ref_item{'reftype'} = $type;
3573                         $ref_item{'refid'}   = $id;
3574                 }
3575
3576                 if ($type eq "tag" || $type eq "commit") {
3577                         $ref_item{'epoch'} = $epoch;
3578                         if ($epoch) {
3579                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3580                         } else {
3581                                 $ref_item{'age'} = "unknown";
3582                         }
3583                 }
3584
3585                 push @tagslist, \%ref_item;
3586         }
3587         close $fd;
3588
3589         return wantarray ? @tagslist : \@tagslist;
3590 }
3591
3592 ## ----------------------------------------------------------------------
3593 ## filesystem-related functions
3594
3595 sub get_file_owner {
3596         my $path = shift;
3597
3598         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3599         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3600         if (!defined $gcos) {
3601                 return undef;
3602         }
3603         my $owner = $gcos;
3604         $owner =~ s/[,;].*$//;
3605         return to_utf8($owner);
3606 }
3607
3608 # assume that file exists
3609 sub insert_file {
3610         my $filename = shift;
3611
3612         open my $fd, '<', $filename;
3613         print map { to_utf8($_) } <$fd>;
3614         close $fd;
3615 }
3616
3617 ## ......................................................................
3618 ## mimetype related functions
3619
3620 sub mimetype_guess_file {
3621         my $filename = shift;
3622         my $mimemap = shift;
3623         -r $mimemap or return undef;
3624
3625         my %mimemap;
3626         open(my $mh, '<', $mimemap) or return undef;
3627         while (<$mh>) {
3628                 next if m/^#/; # skip comments
3629                 my ($mimetype, @exts) = split(/\s+/);
3630                 foreach my $ext (@exts) {
3631                         $mimemap{$ext} = $mimetype;
3632                 }
3633         }
3634         close($mh);
3635
3636         $filename =~ /\.([^.]*)$/;
3637         return $mimemap{$1};
3638 }
3639
3640 sub mimetype_guess {
3641         my $filename = shift;
3642         my $mime;
3643         $filename =~ /\./ or return undef;
3644
3645         if ($mimetypes_file) {
3646                 my $file = $mimetypes_file;
3647                 if ($file !~ m!^/!) { # if it is relative path
3648                         # it is relative to project
3649                         $file = "$projectroot/$project/$file";
3650                 }
3651                 $mime = mimetype_guess_file($filename, $file);
3652         }
3653         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3654         return $mime;
3655 }
3656
3657 sub blob_mimetype {
3658         my $fd = shift;
3659         my $filename = shift;
3660
3661         if ($filename) {
3662                 my $mime = mimetype_guess($filename);
3663                 $mime and return $mime;
3664         }
3665
3666         # just in case
3667         return $default_blob_plain_mimetype unless $fd;
3668
3669         if (-T $fd) {
3670                 return 'text/plain';
3671         } elsif (! $filename) {
3672                 return 'application/octet-stream';
3673         } elsif ($filename =~ m/\.png$/i) {
3674                 return 'image/png';
3675         } elsif ($filename =~ m/\.gif$/i) {
3676                 return 'image/gif';
3677         } elsif ($filename =~ m/\.jpe?g$/i) {
3678                 return 'image/jpeg';
3679         } else {
3680                 return 'application/octet-stream';
3681         }
3682 }
3683
3684 sub blob_contenttype {
3685         my ($fd, $file_name, $type) = @_;
3686
3687         $type ||= blob_mimetype($fd, $file_name);
3688         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3689                 $type .= "; charset=$default_text_plain_charset";
3690         }
3691
3692         return $type;
3693 }
3694
3695 # guess file syntax for syntax highlighting; return undef if no highlighting
3696 # the name of syntax can (in the future) depend on syntax highlighter used
3697 sub guess_file_syntax {
3698         my ($highlight, $mimetype, $file_name) = @_;
3699         return undef unless ($highlight && defined $file_name);
3700         my $basename = basename($file_name, '.in');
3701         return $highlight_basename{$basename}
3702                 if exists $highlight_basename{$basename};
3703
3704         $basename =~ /\.([^.]*)$/;
3705         my $ext = $1 or return undef;
3706         return $highlight_ext{$ext}
3707                 if exists $highlight_ext{$ext};
3708
3709         return undef;
3710 }
3711
3712 # run highlighter and return FD of its output,
3713 # or return original FD if no highlighting
3714 sub run_highlighter {
3715         my ($fd, $highlight, $syntax) = @_;
3716         return $fd unless ($highlight && defined $syntax);
3717
3718         close $fd;
3719         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3720                   quote_command($highlight_bin).
3721                   " --replace-tabs=8 --fragment --syntax $syntax |"
3722                 or die_error(500, "Couldn't open file or run syntax highlighter");
3723         return $fd;
3724 }
3725
3726 ## ======================================================================
3727 ## functions printing HTML: header, footer, error page
3728
3729 sub get_page_title {
3730         my $title = to_utf8($site_name);
3731
3732         return $title unless (defined $project);
3733         $title .= " - " . to_utf8($project);
3734
3735         return $title unless (defined $action);
3736         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3737
3738         return $title unless (defined $file_name);
3739         $title .= " - " . esc_path($file_name);
3740         if ($action eq "tree" && $file_name !~ m|/$|) {
3741                 $title .= "/";
3742         }
3743
3744         return $title;
3745 }
3746
3747 sub get_content_type_html {
3748         # require explicit support from the UA if we are to send the page as
3749         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3750         # we have to do this because MSIE sometimes globs '*/*', pretending to
3751         # support xhtml+xml but choking when it gets what it asked for.
3752         if (defined $cgi->http('HTTP_ACCEPT') &&
3753             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3754             $cgi->Accept('application/xhtml+xml') != 0) {
3755                 return 'application/xhtml+xml';
3756         } else {
3757                 return 'text/html';
3758         }
3759 }
3760
3761 sub print_feed_meta {
3762         if (defined $project) {
3763                 my %href_params = get_feed_info();
3764                 if (!exists $href_params{'-title'}) {
3765                         $href_params{'-title'} = 'log';
3766                 }
3767
3768                 foreach my $format (qw(RSS Atom)) {
3769                         my $type = lc($format);
3770                         my %link_attr = (
3771                                 '-rel' => 'alternate',
3772                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3773                                 '-type' => "application/$type+xml"
3774                         );
3775
3776                         $href_params{'action'} = $type;
3777                         $link_attr{'-href'} = href(%href_params);
3778                         print "<link ".
3779                               "rel=\"$link_attr{'-rel'}\" ".
3780                               "title=\"$link_attr{'-title'}\" ".
3781                               "href=\"$link_attr{'-href'}\" ".
3782                               "type=\"$link_attr{'-type'}\" ".
3783                               "/>\n";
3784
3785                         $href_params{'extra_options'} = '--no-merges';
3786                         $link_attr{'-href'} = href(%href_params);
3787                         $link_attr{'-title'} .= ' (no merges)';
3788                         print "<link ".
3789                               "rel=\"$link_attr{'-rel'}\" ".
3790                               "title=\"$link_attr{'-title'}\" ".
3791                               "href=\"$link_attr{'-href'}\" ".
3792                               "type=\"$link_attr{'-type'}\" ".
3793                               "/>\n";
3794                 }
3795
3796         } else {
3797                 printf('<link rel="alternate" title="%s projects list" '.
3798                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3799                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3800                 printf('<link rel="alternate" title="%s projects feeds" '.
3801                        'href="%s" type="text/x-opml" />'."\n",
3802                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3803         }
3804 }
3805
3806 sub print_header_links {
3807         my $status = shift;
3808
3809         # print out each stylesheet that exist, providing backwards capability
3810         # for those people who defined $stylesheet in a config file
3811         if (defined $stylesheet) {
3812                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3813         } else {
3814                 foreach my $stylesheet (@stylesheets) {
3815                         next unless $stylesheet;
3816                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3817                 }
3818         }
3819         print_feed_meta()
3820                 if ($status eq '200 OK');
3821         if (defined $favicon) {
3822                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3823         }
3824 }
3825
3826 sub print_nav_breadcrumbs {
3827         my %opts = @_;
3828
3829         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3830         if (defined $project) {
3831                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3832                 if (defined $action) {
3833                         my $action_print = $action ;
3834                         if (defined $opts{-action_extra}) {
3835                                 $action_print = $cgi->a({-href => href(action=>$action)},
3836                                         $action);
3837                         }
3838                         print " / $action_print";
3839                 }
3840                 if (defined $opts{-action_extra}) {
3841                         print " / $opts{-action_extra}";
3842                 }
3843                 print "\n";
3844         }
3845 }
3846
3847 sub print_search_form {
3848         if (!defined $searchtext) {
3849                 $searchtext = "";
3850         }
3851         my $search_hash;
3852         if (defined $hash_base) {
3853                 $search_hash = $hash_base;
3854         } elsif (defined $hash) {
3855                 $search_hash = $hash;
3856         } else {
3857                 $search_hash = "HEAD";
3858         }
3859         my $action = $my_uri;
3860         my $use_pathinfo = gitweb_check_feature('pathinfo');
3861         if ($use_pathinfo) {
3862                 $action .= "/".esc_url($project);
3863         }
3864         print $cgi->startform(-method => "get", -action => $action) .
3865               "<div class=\"search\">\n" .
3866               (!$use_pathinfo &&
3867               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3868               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3869               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3870               $cgi->popup_menu(-name => 'st', -default => 'commit',
3871                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3872               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3873               " search:\n",
3874               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3875               "<span title=\"Extended regular expression\">" .
3876               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3877                              -checked => $search_use_regexp) .
3878               "</span>" .
3879               "</div>" .
3880               $cgi->end_form() . "\n";
3881 }
3882
3883 sub git_header_html {
3884         my $status = shift || "200 OK";
3885         my $expires = shift;
3886         my %opts = @_;
3887
3888         my $title = get_page_title();
3889         my $content_type = get_content_type_html();
3890         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3891                            -status=> $status, -expires => $expires)
3892                 unless ($opts{'-no_http_header'});
3893         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3894         print <<EOF;
3895 <?xml version="1.0" encoding="utf-8"?>
3896 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3897 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3898 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3899 <!-- git core binaries version $git_version -->
3900 <head>
3901 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3902 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3903 <meta name="robots" content="index, nofollow"/>
3904 <title>$title</title>
3905 EOF
3906         # the stylesheet, favicon etc urls won't work correctly with path_info
3907         # unless we set the appropriate base URL
3908         if ($ENV{'PATH_INFO'}) {
3909                 print "<base href=\"".esc_url($base_url)."\" />\n";
3910         }
3911         print_header_links($status);
3912
3913         if (defined $site_html_head_string) {
3914                 print to_utf8($site_html_head_string);
3915         }
3916
3917         print "</head>\n" .
3918               "<body>\n";
3919
3920         if (defined $site_header && -f $site_header) {
3921                 insert_file($site_header);
3922         }
3923
3924         print "<div class=\"page_header\">\n";
3925         if (defined $logo) {
3926                 print $cgi->a({-href => esc_url($logo_url),
3927                                -title => $logo_label},
3928                               $cgi->img({-src => esc_url($logo),
3929                                          -width => 72, -height => 27,
3930                                          -alt => "git",
3931                                          -class => "logo"}));
3932         }
3933         print_nav_breadcrumbs(%opts);
3934         print "</div>\n";
3935
3936         my $have_search = gitweb_check_feature('search');
3937         if (defined $project && $have_search) {
3938                 print_search_form();
3939         }
3940 }
3941
3942 sub git_footer_html {
3943         my $feed_class = 'rss_logo';
3944
3945         print "<div class=\"page_footer\">\n";
3946         if (defined $project) {
3947                 my $descr = git_get_project_description($project);
3948                 if (defined $descr) {
3949                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3950                 }
3951
3952                 my %href_params = get_feed_info();
3953                 if (!%href_params) {
3954                         $feed_class .= ' generic';
3955                 }
3956                 $href_params{'-title'} ||= 'log';
3957
3958                 foreach my $format (qw(RSS Atom)) {
3959                         $href_params{'action'} = lc($format);
3960                         print $cgi->a({-href => href(%href_params),
3961                                       -title => "$href_params{'-title'} $format feed",
3962                                       -class => $feed_class}, $format)."\n";
3963                 }
3964
3965         } else {
3966                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3967                               -class => $feed_class}, "OPML") . " ";
3968                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3969                               -class => $feed_class}, "TXT") . "\n";
3970         }
3971         print "</div>\n"; # class="page_footer"
3972
3973         if (defined $t0 && gitweb_check_feature('timed')) {
3974                 print "<div id=\"generating_info\">\n";
3975                 print 'This page took '.
3976                       '<span id="generating_time" class="time_span">'.
3977                       tv_interval($t0, [ gettimeofday() ]).
3978                       ' seconds </span>'.
3979                       ' and '.
3980                       '<span id="generating_cmd">'.
3981                       $number_of_git_cmds.
3982                       '</span> git commands '.
3983                       " to generate.\n";
3984                 print "</div>\n"; # class="page_footer"
3985         }
3986
3987         if (defined $site_footer && -f $site_footer) {
3988                 insert_file($site_footer);
3989         }
3990
3991         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3992         if (defined $action &&
3993             $action eq 'blame_incremental') {
3994                 print qq!<script type="text/javascript">\n!.
3995                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3996                       qq!           "!. href() .qq!");\n!.
3997                       qq!</script>\n!;
3998         } else {
3999                 my ($jstimezone, $tz_cookie, $datetime_class) =
4000                         gitweb_get_feature('javascript-timezone');
4001
4002                 print qq!<script type="text/javascript">\n!.
4003                       qq!window.onload = function () {\n!;
4004                 if (gitweb_check_feature('javascript-actions')) {
4005                         print qq!       fixLinks();\n!;
4006                 }
4007                 if ($jstimezone && $tz_cookie && $datetime_class) {
4008                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4009                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4010                 }
4011                 print qq!};\n!.
4012                       qq!</script>\n!;
4013         }
4014
4015         print "</body>\n" .
4016               "</html>";
4017 }
4018
4019 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4020 # Example: die_error(404, 'Hash not found')
4021 # By convention, use the following status codes (as defined in RFC 2616):
4022 # 400: Invalid or missing CGI parameters, or
4023 #      requested object exists but has wrong type.
4024 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4025 #      this server or project.
4026 # 404: Requested object/revision/project doesn't exist.
4027 # 500: The server isn't configured properly, or
4028 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4029 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4030 # 503: The server is currently unavailable (because it is overloaded,
4031 #      or down for maintenance).  Generally, this is a temporary state.
4032 sub die_error {
4033         my $status = shift || 500;
4034         my $error = esc_html(shift) || "Internal Server Error";
4035         my $extra = shift;
4036         my %opts = @_;
4037
4038         my %http_responses = (
4039                 400 => '400 Bad Request',
4040                 403 => '403 Forbidden',
4041                 404 => '404 Not Found',
4042                 500 => '500 Internal Server Error',
4043                 503 => '503 Service Unavailable',
4044         );
4045         git_header_html($http_responses{$status}, undef, %opts);
4046         print <<EOF;
4047 <div class="page_body">
4048 <br /><br />
4049 $status - $error
4050 <br />
4051 EOF
4052         if (defined $extra) {
4053                 print "<hr />\n" .
4054                       "$extra\n";
4055         }
4056         print "</div>\n";
4057
4058         git_footer_html();
4059         goto DONE_GITWEB
4060                 unless ($opts{'-error_handler'});
4061 }
4062
4063 ## ----------------------------------------------------------------------
4064 ## functions printing or outputting HTML: navigation
4065
4066 sub git_print_page_nav {
4067         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4068         $extra = '' if !defined $extra; # pager or formats
4069
4070         my @navs = qw(summary shortlog log commit commitdiff tree);
4071         if ($suppress) {
4072                 @navs = grep { $_ ne $suppress } @navs;
4073         }
4074
4075         my %arg = map { $_ => {action=>$_} } @navs;
4076         if (defined $head) {
4077                 for (qw(commit commitdiff)) {
4078                         $arg{$_}{'hash'} = $head;
4079                 }
4080                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4081                         for (qw(shortlog log)) {
4082                                 $arg{$_}{'hash'} = $head;
4083                         }
4084                 }
4085         }
4086
4087         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4088         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4089
4090         my @actions = gitweb_get_feature('actions');
4091         my %repl = (
4092                 '%' => '%',
4093                 'n' => $project,         # project name
4094                 'f' => $git_dir,         # project path within filesystem
4095                 'h' => $treehead || '',  # current hash ('h' parameter)
4096                 'b' => $treebase || '',  # hash base ('hb' parameter)
4097         );
4098         while (@actions) {
4099                 my ($label, $link, $pos) = splice(@actions,0,3);
4100                 # insert
4101                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4102                 # munch munch
4103                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4104                 $arg{$label}{'_href'} = $link;
4105         }
4106
4107         print "<div class=\"page_nav\">\n" .
4108                 (join " | ",
4109                  map { $_ eq $current ?
4110                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4111                  } @navs);
4112         print "<br/>\n$extra<br/>\n" .
4113               "</div>\n";
4114 }
4115
4116 # returns a submenu for the nagivation of the refs views (tags, heads,
4117 # remotes) with the current view disabled and the remotes view only
4118 # available if the feature is enabled
4119 sub format_ref_views {
4120         my ($current) = @_;
4121         my @ref_views = qw{tags heads};
4122         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4123         return join " | ", map {
4124                 $_ eq $current ? $_ :
4125                 $cgi->a({-href => href(action=>$_)}, $_)
4126         } @ref_views
4127 }
4128
4129 sub format_paging_nav {
4130         my ($action, $page, $has_next_link) = @_;
4131         my $paging_nav;
4132
4133
4134         if ($page > 0) {
4135                 $paging_nav .=
4136                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4137                         " &sdot; " .
4138                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4139                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4140         } else {
4141                 $paging_nav .= "first &sdot; prev";
4142         }
4143
4144         if ($has_next_link) {
4145                 $paging_nav .= " &sdot; " .
4146                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4147                                  -accesskey => "n", -title => "Alt-n"}, "next");
4148         } else {
4149                 $paging_nav .= " &sdot; next";
4150         }
4151
4152         return $paging_nav;
4153 }
4154
4155 ## ......................................................................
4156 ## functions printing or outputting HTML: div
4157
4158 sub git_print_header_div {
4159         my ($action, $title, $hash, $hash_base) = @_;
4160         my %args = ();
4161
4162         $args{'action'} = $action;
4163         $args{'hash'} = $hash if $hash;
4164         $args{'hash_base'} = $hash_base if $hash_base;
4165
4166         print "<div class=\"header\">\n" .
4167               $cgi->a({-href => href(%args), -class => "title"},
4168               $title ? $title : $action) .
4169               "\n</div>\n";
4170 }
4171
4172 sub format_repo_url {
4173         my ($name, $url) = @_;
4174         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4175 }
4176
4177 # Group output by placing it in a DIV element and adding a header.
4178 # Options for start_div() can be provided by passing a hash reference as the
4179 # first parameter to the function.
4180 # Options to git_print_header_div() can be provided by passing an array
4181 # reference. This must follow the options to start_div if they are present.
4182 # The content can be a scalar, which is output as-is, a scalar reference, which
4183 # is output after html escaping, an IO handle passed either as *handle or
4184 # *handle{IO}, or a function reference. In the latter case all following
4185 # parameters will be taken as argument to the content function call.
4186 sub git_print_section {
4187         my ($div_args, $header_args, $content);
4188         my $arg = shift;
4189         if (ref($arg) eq 'HASH') {
4190                 $div_args = $arg;
4191                 $arg = shift;
4192         }
4193         if (ref($arg) eq 'ARRAY') {
4194                 $header_args = $arg;
4195                 $arg = shift;
4196         }
4197         $content = $arg;
4198
4199         print $cgi->start_div($div_args);
4200         git_print_header_div(@$header_args);
4201
4202         if (ref($content) eq 'CODE') {
4203                 $content->(@_);
4204         } elsif (ref($content) eq 'SCALAR') {
4205                 print esc_html($$content);
4206         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4207                 print <$content>;
4208         } elsif (!ref($content) && defined($content)) {
4209                 print $content;
4210         }
4211
4212         print $cgi->end_div;
4213 }
4214
4215 sub format_timestamp_html {
4216         my $date = shift;
4217         my $strtime = $date->{'rfc2822'};
4218
4219         my (undef, undef, $datetime_class) =
4220                 gitweb_get_feature('javascript-timezone');
4221         if ($datetime_class) {
4222                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4223         }
4224
4225         my $localtime_format = '(%02d:%02d %s)';
4226         if ($date->{'hour_local'} < 6) {
4227                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4228         }
4229         $strtime .= ' ' .
4230                     sprintf($localtime_format,
4231                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4232
4233         return $strtime;
4234 }
4235
4236 # Outputs the author name and date in long form
4237 sub git_print_authorship {
4238         my $co = shift;
4239         my %opts = @_;
4240         my $tag = $opts{-tag} || 'div';
4241         my $author = $co->{'author_name'};
4242
4243         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4244         print "<$tag class=\"author_date\">" .
4245               format_search_author($author, "author", esc_html($author)) .
4246               " [".format_timestamp_html(\%ad)."]".
4247               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4248               "</$tag>\n";
4249 }
4250
4251 # Outputs table rows containing the full author or committer information,
4252 # in the format expected for 'commit' view (& similar).
4253 # Parameters are a commit hash reference, followed by the list of people
4254 # to output information for. If the list is empty it defaults to both
4255 # author and committer.
4256 sub git_print_authorship_rows {
4257         my $co = shift;
4258         # too bad we can't use @people = @_ || ('author', 'committer')
4259         my @people = @_;
4260         @people = ('author', 'committer') unless @people;
4261         foreach my $who (@people) {
4262                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4263                 print "<tr><td>$who</td><td>" .
4264                       format_search_author($co->{"${who}_name"}, $who,
4265                                            esc_html($co->{"${who}_name"})) . " " .
4266                       format_search_author($co->{"${who}_email"}, $who,
4267                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4268                       "</td><td rowspan=\"2\">" .
4269                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4270                       "</td></tr>\n" .
4271                       "<tr>" .
4272                       "<td></td><td>" .
4273                       format_timestamp_html(\%wd) .
4274                       "</td>" .
4275                       "</tr>\n";
4276         }
4277 }
4278
4279 sub git_print_page_path {
4280         my $name = shift;
4281         my $type = shift;
4282         my $hb = shift;
4283
4284
4285         print "<div class=\"page_path\">";
4286         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4287                       -title => 'tree root'}, to_utf8("[$project]"));
4288         print " / ";
4289         if (defined $name) {
4290                 my @dirname = split '/', $name;
4291                 my $basename = pop @dirname;
4292                 my $fullname = '';
4293
4294                 foreach my $dir (@dirname) {
4295                         $fullname .= ($fullname ? '/' : '') . $dir;
4296                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4297                                                      hash_base=>$hb),
4298                                       -title => $fullname}, esc_path($dir));
4299                         print " / ";
4300                 }
4301                 if (defined $type && $type eq 'blob') {
4302                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4303                                                      hash_base=>$hb),
4304                                       -title => $name}, esc_path($basename));
4305                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4306 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4307 <script>
4308 function toggleLineNumbers() {
4309         e = document.getElementById("lineNoStyle");
4310         e2 = document.getElementById("lineNoToggle");
4311         if (e2.innerHTML == "[Hide line numbers]") {
4312                 e.innerHTML = ".linenr { display:none; }";
4313                 e2.innerHTML = "[Show line numbers]";
4314         }
4315         else {
4316                 e.innerHTML = "";
4317                 e2.innerHTML = "[Hide line numbers]";
4318         }
4319 }
4320 document.getElementsByTagName("head")[0].innerHTML += "<style id=\'lineNoStyle\'></style>";
4321 toggleLineNumbers();
4322 </script>
4323 ';
4324                 } elsif (defined $type && $type eq 'tree') {
4325                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4326                                                      hash_base=>$hb),
4327                                       -title => $name}, esc_path($basename));
4328                         print " / ";
4329                 } else {
4330                         print esc_path($basename);
4331                 }
4332         }
4333         print "<br/></div>\n";
4334 }
4335
4336 sub git_print_log {
4337         my $log = shift;
4338         my %opts = @_;
4339
4340         if ($opts{'-remove_title'}) {
4341                 # remove title, i.e. first line of log
4342                 shift @$log;
4343         }
4344         # remove leading empty lines
4345         while (defined $log->[0] && $log->[0] eq "") {
4346                 shift @$log;
4347         }
4348
4349         # print log
4350         my $signoff = 0;
4351         my $empty = 0;
4352         foreach my $line (@$log) {
4353                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4354                         $signoff = 1;
4355                         $empty = 0;
4356                         if (! $opts{'-remove_signoff'}) {
4357                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4358                                 next;
4359                         } else {
4360                                 # remove signoff lines
4361                                 next;
4362                         }
4363                 } else {
4364                         $signoff = 0;
4365                 }
4366
4367                 # print only one empty line
4368                 # do not print empty line after signoff
4369                 if ($line eq "") {
4370                         next if ($empty || $signoff);
4371                         $empty = 1;
4372                 } else {
4373                         $empty = 0;
4374                 }
4375
4376                 print format_log_line_html($line) . "<br/>\n";
4377         }
4378
4379         if ($opts{'-final_empty_line'}) {
4380                 # end with single empty line
4381                 print "<br/>\n" unless $empty;
4382         }
4383 }
4384
4385 # return link target (what link points to)
4386 sub git_get_link_target {
4387         my $hash = shift;
4388         my $link_target;
4389
4390         # read link
4391         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4392                 or return;
4393         {
4394                 local $/ = undef;
4395                 $link_target = <$fd>;
4396         }
4397         close $fd
4398                 or return;
4399
4400         return $link_target;
4401 }
4402
4403 # given link target, and the directory (basedir) the link is in,
4404 # return target of link relative to top directory (top tree);
4405 # return undef if it is not possible (including absolute links).
4406 sub normalize_link_target {
4407         my ($link_target, $basedir) = @_;
4408
4409         # absolute symlinks (beginning with '/') cannot be normalized
4410         return if (substr($link_target, 0, 1) eq '/');
4411
4412         # normalize link target to path from top (root) tree (dir)
4413         my $path;
4414         if ($basedir) {
4415                 $path = $basedir . '/' . $link_target;
4416         } else {
4417                 # we are in top (root) tree (dir)
4418                 $path = $link_target;
4419         }
4420
4421         # remove //, /./, and /../
4422         my @path_parts;
4423         foreach my $part (split('/', $path)) {
4424                 # discard '.' and ''
4425                 next if (!$part || $part eq '.');
4426                 # handle '..'
4427                 if ($part eq '..') {
4428                         if (@path_parts) {
4429                                 pop @path_parts;
4430                         } else {
4431                                 # link leads outside repository (outside top dir)
4432                                 return;
4433                         }
4434                 } else {
4435                         push @path_parts, $part;
4436                 }
4437         }
4438         $path = join('/', @path_parts);
4439
4440         return $path;
4441 }
4442
4443 # print tree entry (row of git_tree), but without encompassing <tr> element
4444 sub git_print_tree_entry {
4445         my ($t, $basedir, $hash_base, $have_blame) = @_;
4446
4447         my %base_key = ();
4448         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4449
4450         # The format of a table row is: mode list link.  Where mode is
4451         # the mode of the entry, list is the name of the entry, an href,
4452         # and link is the action links of the entry.
4453
4454         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4455         if (exists $t->{'size'}) {
4456                 print "<td class=\"size\">$t->{'size'}</td>\n";
4457         }
4458         if ($t->{'type'} eq "blob") {
4459                 print "<td class=\"list\">" .
4460                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4461                                                file_name=>"$basedir$t->{'name'}", %base_key),
4462                                 -class => "list"}, esc_path($t->{'name'}));
4463                 if (S_ISLNK(oct $t->{'mode'})) {
4464                         my $link_target = git_get_link_target($t->{'hash'});
4465                         if ($link_target) {
4466                                 my $norm_target = normalize_link_target($link_target, $basedir);
4467                                 if (defined $norm_target) {
4468                                         print " -> " .
4469                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4470                                                                      file_name=>$norm_target),
4471                                                        -title => $norm_target}, esc_path($link_target));
4472                                 } else {
4473                                         print " -> " . esc_path($link_target);
4474                                 }
4475                         }
4476                 }
4477                 print "</td>\n";
4478                 print "<td class=\"link\">";
4479                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4480                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4481                               "blob");
4482                 if ($have_blame) {
4483                         print " | " .
4484                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4485                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4486                                       "blame");
4487                 }
4488                 if (defined $hash_base) {
4489                         print " | " .
4490                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4491                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4492                                       "history");
4493                 }
4494                 print " | " .
4495                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4496                                                file_name=>"$basedir$t->{'name'}")},
4497                                 "raw");
4498                 print "</td>\n";
4499
4500         } elsif ($t->{'type'} eq "tree") {
4501                 print "<td class=\"list\">";
4502                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4503                                              file_name=>"$basedir$t->{'name'}",
4504                                              %base_key)},
4505                               esc_path($t->{'name'}));
4506                 print "</td>\n";
4507                 print "<td class=\"link\">";
4508                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4509                                              file_name=>"$basedir$t->{'name'}",
4510                                              %base_key)},
4511                               "tree");
4512                 if (defined $hash_base) {
4513                         print " | " .
4514                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4515                                                      file_name=>"$basedir$t->{'name'}")},
4516                                       "history");
4517                 }
4518                 print "</td>\n";
4519         } else {
4520                 # unknown object: we can only present history for it
4521                 # (this includes 'commit' object, i.e. submodule support)
4522                 print "<td class=\"list\">" .
4523                       esc_path($t->{'name'}) .
4524                       "</td>\n";
4525                 print "<td class=\"link\">";
4526                 if (defined $hash_base) {
4527                         print $cgi->a({-href => href(action=>"history",
4528                                                      hash_base=>$hash_base,
4529                                                      file_name=>"$basedir$t->{'name'}")},
4530                                       "history");
4531                 }
4532                 print "</td>\n";
4533         }
4534 }
4535
4536 ## ......................................................................
4537 ## functions printing large fragments of HTML
4538
4539 # get pre-image filenames for merge (combined) diff
4540 sub fill_from_file_info {
4541         my ($diff, @parents) = @_;
4542
4543         $diff->{'from_file'} = [ ];
4544         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4545         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4546                 if ($diff->{'status'}[$i] eq 'R' ||
4547                     $diff->{'status'}[$i] eq 'C') {
4548                         $diff->{'from_file'}[$i] =
4549                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4550                 }
4551         }
4552
4553         return $diff;
4554 }
4555
4556 # is current raw difftree line of file deletion
4557 sub is_deleted {
4558         my $diffinfo = shift;
4559
4560         return $diffinfo->{'to_id'} eq ('0' x 40);
4561 }
4562
4563 # does patch correspond to [previous] difftree raw line
4564 # $diffinfo  - hashref of parsed raw diff format
4565 # $patchinfo - hashref of parsed patch diff format
4566 #              (the same keys as in $diffinfo)
4567 sub is_patch_split {
4568         my ($diffinfo, $patchinfo) = @_;
4569
4570         return defined $diffinfo && defined $patchinfo
4571                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4572 }
4573
4574
4575 sub git_difftree_body {
4576         my ($difftree, $hash, @parents) = @_;
4577         my ($parent) = $parents[0];
4578         my $have_blame = gitweb_check_feature('blame');
4579         print "<div class=\"list_head\">\n";
4580         if ($#{$difftree} > 10) {
4581                 print(($#{$difftree} + 1) . " files changed:\n");
4582         }
4583         print "</div>\n";
4584
4585         print "<table class=\"" .
4586               (@parents > 1 ? "combined " : "") .
4587               "diff_tree\">\n";
4588
4589         # header only for combined diff in 'commitdiff' view
4590         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4591         if ($has_header) {
4592                 # table header
4593                 print "<thead><tr>\n" .
4594                        "<th></th><th></th>\n"; # filename, patchN link
4595                 for (my $i = 0; $i < @parents; $i++) {
4596                         my $par = $parents[$i];
4597                         print "<th>" .
4598                               $cgi->a({-href => href(action=>"commitdiff",
4599                                                      hash=>$hash, hash_parent=>$par),
4600                                        -title => 'commitdiff to parent number ' .
4601                                                   ($i+1) . ': ' . substr($par,0,7)},
4602                                       $i+1) .
4603                               "&nbsp;</th>\n";
4604                 }
4605                 print "</tr></thead>\n<tbody>\n";
4606         }
4607
4608         my $alternate = 1;
4609         my $patchno = 0;
4610         foreach my $line (@{$difftree}) {
4611                 my $diff = parsed_difftree_line($line);
4612
4613                 if ($alternate) {
4614                         print "<tr class=\"dark\">\n";
4615                 } else {
4616                         print "<tr class=\"light\">\n";
4617                 }
4618                 $alternate ^= 1;
4619
4620                 if (exists $diff->{'nparents'}) { # combined diff
4621
4622                         fill_from_file_info($diff, @parents)
4623                                 unless exists $diff->{'from_file'};
4624
4625                         if (!is_deleted($diff)) {
4626                                 # file exists in the result (child) commit
4627                                 print "<td>" .
4628                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4629                                                              file_name=>$diff->{'to_file'},
4630                                                              hash_base=>$hash),
4631                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4632                                       "</td>\n";
4633                         } else {
4634                                 print "<td>" .
4635                                       esc_path($diff->{'to_file'}) .
4636                                       "</td>\n";
4637                         }
4638
4639                         if ($action eq 'commitdiff') {
4640                                 # link to patch
4641                                 $patchno++;
4642                                 print "<td class=\"link\">" .
4643                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4644                                               "patch") .
4645                                       " | " .
4646                                       "</td>\n";
4647                         }
4648
4649                         my $has_history = 0;
4650                         my $not_deleted = 0;
4651                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4652                                 my $hash_parent = $parents[$i];
4653                                 my $from_hash = $diff->{'from_id'}[$i];
4654                                 my $from_path = $diff->{'from_file'}[$i];
4655                                 my $status = $diff->{'status'}[$i];
4656
4657                                 $has_history ||= ($status ne 'A');
4658                                 $not_deleted ||= ($status ne 'D');
4659
4660                                 if ($status eq 'A') {
4661                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4662                                 } elsif ($status eq 'D') {
4663                                         print "<td class=\"link\">" .
4664                                               $cgi->a({-href => href(action=>"blob",
4665                                                                      hash_base=>$hash,
4666                                                                      hash=>$from_hash,
4667                                                                      file_name=>$from_path)},
4668                                                       "blob" . ($i+1)) .
4669                                               " | </td>\n";
4670                                 } else {
4671                                         if ($diff->{'to_id'} eq $from_hash) {
4672                                                 print "<td class=\"link nochange\">";
4673                                         } else {
4674                                                 print "<td class=\"link\">";
4675                                         }
4676                                         print $cgi->a({-href => href(action=>"blobdiff",
4677                                                                      hash=>$diff->{'to_id'},
4678                                                                      hash_parent=>$from_hash,
4679                                                                      hash_base=>$hash,
4680                                                                      hash_parent_base=>$hash_parent,
4681                                                                      file_name=>$diff->{'to_file'},
4682                                                                      file_parent=>$from_path)},
4683                                                       "diff" . ($i+1)) .
4684                                               " | </td>\n";
4685                                 }
4686                         }
4687
4688                         print "<td class=\"link\">";
4689                         if ($not_deleted) {
4690                                 print $cgi->a({-href => href(action=>"blob",
4691                                                              hash=>$diff->{'to_id'},
4692                                                              file_name=>$diff->{'to_file'},
4693                                                              hash_base=>$hash)},
4694                                               "blob");
4695                                 print " | " if ($has_history);
4696                         }
4697                         if ($has_history) {
4698                                 print $cgi->a({-href => href(action=>"history",
4699                                                              file_name=>$diff->{'to_file'},
4700                                                              hash_base=>$hash)},
4701                                               "history");
4702                         }
4703                         print "</td>\n";
4704
4705                         print "</tr>\n";
4706                         next; # instead of 'else' clause, to avoid extra indent
4707                 }
4708                 # else ordinary diff
4709
4710                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4711                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4712                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4713                         $to_mode_oct = oct $diff->{'to_mode'};
4714                         if (S_ISREG($to_mode_oct)) { # only for regular file
4715                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4716                         }
4717                         $to_file_type = file_type($diff->{'to_mode'});
4718                 }
4719                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4720                         $from_mode_oct = oct $diff->{'from_mode'};
4721                         if (S_ISREG($from_mode_oct)) { # only for regular file
4722                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4723                         }
4724                         $from_file_type = file_type($diff->{'from_mode'});
4725                 }
4726
4727                 if ($diff->{'status'} eq "A") { # created
4728                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4729                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4730                         $mode_chng   .= "]</span>";
4731                         print "<td>";
4732                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4733                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4734                                       -class => "list"}, esc_path($diff->{'file'}));
4735                         print "</td>\n";
4736                         print "<td>$mode_chng</td>\n";
4737                         print "<td class=\"link\">";
4738                         if ($action eq 'commitdiff') {
4739                                 # link to patch
4740                                 $patchno++;
4741                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4742                                               "patch") .
4743                                       " | ";
4744                         }
4745                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4746                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4747                                       "blob");
4748                         print "</td>\n";
4749
4750                 } elsif ($diff->{'status'} eq "D") { # deleted
4751                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4752                         print "<td>";
4753                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4754                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4755                                        -class => "list"}, esc_path($diff->{'file'}));
4756                         print "</td>\n";
4757                         print "<td>$mode_chng</td>\n";
4758                         print "<td class=\"link\">";
4759                         if ($action eq 'commitdiff') {
4760                                 # link to patch
4761                                 $patchno++;
4762                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4763                                               "patch") .
4764                                       " | ";
4765                         }
4766                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4767                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4768                                       "blob") . " | ";
4769                         if ($have_blame) {
4770                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4771                                                              file_name=>$diff->{'file'})},
4772                                               "blame") . " | ";
4773                         }
4774                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4775                                                      file_name=>$diff->{'file'})},
4776                                       "history");
4777                         print "</td>\n";
4778
4779                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4780                         my $mode_chnge = "";
4781                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4782                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4783                                 if ($from_file_type ne $to_file_type) {
4784                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4785                                 }
4786                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4787                                         if ($from_mode_str && $to_mode_str) {
4788                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4789                                         } elsif ($to_mode_str) {
4790                                                 $mode_chnge .= " mode: $to_mode_str";
4791                                         }
4792                                 }
4793                                 $mode_chnge .= "]</span>\n";
4794                         }
4795                         print "<td>";
4796                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4797                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4798                                       -class => "list"}, esc_path($diff->{'file'}));
4799                         print "</td>\n";
4800                         print "<td>$mode_chnge</td>\n";
4801                         print "<td class=\"link\">";
4802                         if ($action eq 'commitdiff') {
4803                                 # link to patch
4804                                 $patchno++;
4805                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4806                                               "patch") .
4807                                       " | ";
4808                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4809                                 # "commit" view and modified file (not onlu mode changed)
4810                                 print $cgi->a({-href => href(action=>"blobdiff",
4811                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4812                                                              hash_base=>$hash, hash_parent_base=>$parent,
4813                                                              file_name=>$diff->{'file'})},
4814                                               "diff") .
4815                                       " | ";
4816                         }
4817                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4818                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4819                                        "blob") . " | ";
4820                         if ($have_blame) {
4821                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4822                                                              file_name=>$diff->{'file'})},
4823                                               "blame") . " | ";
4824                         }
4825                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4826                                                      file_name=>$diff->{'file'})},
4827                                       "history");
4828                         print "</td>\n";
4829
4830                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4831                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4832                         my $nstatus = $status_name{$diff->{'status'}};
4833                         my $mode_chng = "";
4834                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4835                                 # mode also for directories, so we cannot use $to_mode_str
4836                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4837                         }
4838                         print "<td>" .
4839                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4840                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4841                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4842                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4843                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4844                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4845                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4846                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4847                               "<td class=\"link\">";
4848                         if ($action eq 'commitdiff') {
4849                                 # link to patch
4850                                 $patchno++;
4851                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4852                                               "patch") .
4853                                       " | ";
4854                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4855                                 # "commit" view and modified file (not only pure rename or copy)
4856                                 print $cgi->a({-href => href(action=>"blobdiff",
4857                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4858                                                              hash_base=>$hash, hash_parent_base=>$parent,
4859                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4860                                               "diff") .
4861                                       " | ";
4862                         }
4863                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4864                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4865                                       "blob") . " | ";
4866                         if ($have_blame) {
4867                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4868                                                              file_name=>$diff->{'to_file'})},
4869                                               "blame") . " | ";
4870                         }
4871                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4872                                                     file_name=>$diff->{'to_file'})},
4873                                       "history");
4874                         print "</td>\n";
4875
4876                 } # we should not encounter Unmerged (U) or Unknown (X) status
4877                 print "</tr>\n";
4878         }
4879         print "</tbody>" if $has_header;
4880         print "</table>\n";
4881 }
4882
4883 sub print_sidebyside_diff_chunk {
4884         my @chunk = @_;
4885         my (@ctx, @rem, @add);
4886
4887         return unless @chunk;
4888
4889         # incomplete last line might be among removed or added lines,
4890         # or both, or among context lines: find which
4891         for (my $i = 1; $i < @chunk; $i++) {
4892                 if ($chunk[$i][0] eq 'incomplete') {
4893                         $chunk[$i][0] = $chunk[$i-1][0];
4894                 }
4895         }
4896
4897         # guardian
4898         push @chunk, ["", ""];
4899
4900         foreach my $line_info (@chunk) {
4901                 my ($class, $line) = @$line_info;
4902
4903                 # print chunk headers
4904                 if ($class && $class eq 'chunk_header') {
4905                         print $line;
4906                         next;
4907                 }
4908
4909                 ## print from accumulator when type of class of lines change
4910                 # empty contents block on start rem/add block, or end of chunk
4911                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4912                         print join '',
4913                                 '<div class="chunk_block ctx">',
4914                                         '<div class="old">',
4915                                         @ctx,
4916                                         '</div>',
4917                                         '<div class="new">',
4918                                         @ctx,
4919                                         '</div>',
4920                                 '</div>';
4921                         @ctx = ();
4922                 }
4923                 # empty add/rem block on start context block, or end of chunk
4924                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4925                         if (!@add) {
4926                                 # pure removal
4927                                 print join '',
4928                                         '<div class="chunk_block rem">',
4929                                                 '<div class="old">',
4930                                                 @rem,
4931                                                 '</div>',
4932                                         '</div>';
4933                         } elsif (!@rem) {
4934                                 # pure addition
4935                                 print join '',
4936                                         '<div class="chunk_block add">',
4937                                                 '<div class="new">',
4938                                                 @add,
4939                                                 '</div>',
4940                                         '</div>';
4941                         } else {
4942                                 # assume that it is change
4943                                 print join '',
4944                                         '<div class="chunk_block chg">',
4945                                                 '<div class="old">',
4946                                                 @rem,
4947                                                 '</div>',
4948                                                 '<div class="new">',
4949                                                 @add,
4950                                                 '</div>',
4951                                         '</div>';
4952                         }
4953                         @rem = @add = ();
4954                 }
4955
4956                 ## adding lines to accumulator
4957                 # guardian value
4958                 last unless $line;
4959                 # rem, add or change
4960                 if ($class eq 'rem') {
4961                         push @rem, $line;
4962                 } elsif ($class eq 'add') {
4963                         push @add, $line;
4964                 }
4965                 # context line
4966                 if ($class eq 'ctx') {
4967                         push @ctx, $line;
4968                 }
4969         }
4970 }
4971
4972 sub git_patchset_body {
4973         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4974         my ($hash_parent) = $hash_parents[0];
4975
4976         my $is_combined = (@hash_parents > 1);
4977         my $patch_idx = 0;
4978         my $patch_number = 0;
4979         my $patch_line;
4980         my $diffinfo;
4981         my $to_name;
4982         my (%from, %to);
4983         my @chunk; # for side-by-side diff
4984
4985         print "<div class=\"patchset\">\n";
4986
4987         # skip to first patch
4988         while ($patch_line = <$fd>) {
4989                 chomp $patch_line;
4990
4991                 last if ($patch_line =~ m/^diff /);
4992         }
4993
4994  PATCH:
4995         while ($patch_line) {
4996
4997                 # parse "git diff" header line
4998                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4999                         # $1 is from_name, which we do not use
5000                         $to_name = unquote($2);
5001                         $to_name =~ s!^b/!!;
5002                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5003                         # $1 is 'cc' or 'combined', which we do not use
5004                         $to_name = unquote($2);
5005                 } else {
5006                         $to_name = undef;
5007                 }
5008
5009                 # check if current patch belong to current raw line
5010                 # and parse raw git-diff line if needed
5011                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5012                         # this is continuation of a split patch
5013                         print "<div class=\"patch cont\">\n";
5014                 } else {
5015                         # advance raw git-diff output if needed
5016                         $patch_idx++ if defined $diffinfo;
5017
5018                         # read and prepare patch information
5019                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5020
5021                         # compact combined diff output can have some patches skipped
5022                         # find which patch (using pathname of result) we are at now;
5023                         if ($is_combined) {
5024                                 while ($to_name ne $diffinfo->{'to_file'}) {
5025                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5026                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5027                                               "</div>\n";  # class="patch"
5028
5029                                         $patch_idx++;
5030                                         $patch_number++;
5031
5032                                         last if $patch_idx > $#$difftree;
5033                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5034                                 }
5035                         }
5036
5037                         # modifies %from, %to hashes
5038                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5039
5040                         # this is first patch for raw difftree line with $patch_idx index
5041                         # we index @$difftree array from 0, but number patches from 1
5042                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5043                 }
5044
5045                 # git diff header
5046                 #assert($patch_line =~ m/^diff /) if DEBUG;
5047                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5048                 $patch_number++;
5049                 # print "git diff" header
5050                 print format_git_diff_header_line($patch_line, $diffinfo,
5051                                                   \%from, \%to);
5052
5053                 # print extended diff header
5054                 print "<div class=\"diff extended_header\">\n";
5055         EXTENDED_HEADER:
5056                 while ($patch_line = <$fd>) {
5057                         chomp $patch_line;
5058
5059                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5060
5061                         print format_extended_diff_header_line($patch_line, $diffinfo,
5062                                                                \%from, \%to);
5063                 }
5064                 print "</div>\n"; # class="diff extended_header"
5065
5066                 # from-file/to-file diff header
5067                 if (! $patch_line) {
5068                         print "</div>\n"; # class="patch"
5069                         last PATCH;
5070                 }
5071                 next PATCH if ($patch_line =~ m/^diff /);
5072                 #assert($patch_line =~ m/^---/) if DEBUG;
5073
5074                 my $last_patch_line = $patch_line;
5075                 $patch_line = <$fd>;
5076                 chomp $patch_line;
5077                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5078
5079                 print format_diff_from_to_header($last_patch_line, $patch_line,
5080                                                  $diffinfo, \%from, \%to,
5081                                                  @hash_parents);
5082
5083                 # the patch itself
5084         LINE:
5085                 while ($patch_line = <$fd>) {
5086                         chomp $patch_line;
5087
5088                         next PATCH if ($patch_line =~ m/^diff /);
5089
5090                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5091                         my $diff_classes = "diff";
5092                         $diff_classes .= " $class" if ($class);
5093                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5094
5095                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5096                                 if ($class eq 'chunk_header') {
5097                                         print_sidebyside_diff_chunk(@chunk);
5098                                         @chunk = ( [ $class, $line ] );
5099                                 } else {
5100                                         push @chunk, [ $class, $line ];
5101                                 }
5102                         } else {
5103                                 # default 'inline' style and unknown styles
5104                                 print $line;
5105                         }
5106                 }
5107
5108         } continue {
5109                 if (@chunk) {
5110                         print_sidebyside_diff_chunk(@chunk);
5111                         @chunk = ();
5112                 }
5113                 print "</div>\n"; # class="patch"
5114         }
5115
5116         # for compact combined (--cc) format, with chunk and patch simplification
5117         # the patchset might be empty, but there might be unprocessed raw lines
5118         for (++$patch_idx if $patch_number > 0;
5119              $patch_idx < @$difftree;
5120              ++$patch_idx) {
5121                 # read and prepare patch information
5122                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5123
5124                 # generate anchor for "patch" links in difftree / whatchanged part
5125                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5126                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5127                       "</div>\n";  # class="patch"
5128
5129                 $patch_number++;
5130         }
5131
5132         if ($patch_number == 0) {
5133                 if (@hash_parents > 1) {
5134                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5135                 } else {
5136                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5137                 }
5138         }
5139
5140         print "</div>\n"; # class="patchset"
5141 }
5142
5143 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5144
5145 # fills project list info (age, description, owner, category, forks)
5146 # for each project in the list, removing invalid projects from
5147 # returned list
5148 # NOTE: modifies $projlist, but does not remove entries from it
5149 sub fill_project_list_info {
5150         my $projlist = shift;
5151         my @projects;
5152
5153         my $show_ctags = gitweb_check_feature('ctags');
5154  PROJECT:
5155         foreach my $pr (@$projlist) {
5156                 my (@activity) = git_get_last_activity($pr->{'path'});
5157                 unless (@activity) {
5158                         next PROJECT;
5159                 }
5160                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5161                 if (!defined $pr->{'descr'}) {
5162                         my $descr = git_get_project_description($pr->{'path'}) || "";
5163                         $descr = to_utf8($descr);
5164                         $pr->{'descr_long'} = $descr;
5165                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5166                 }
5167                 if (!defined $pr->{'owner'}) {
5168                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5169                 }
5170                 if ($show_ctags) {
5171                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5172                 }
5173                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5174                         my $cat = git_get_project_category($pr->{'path'}) ||
5175                                                            $project_list_default_category;
5176                         $pr->{'category'} = to_utf8($cat);
5177                 }
5178
5179                 push @projects, $pr;
5180         }
5181
5182         return @projects;
5183 }
5184
5185 sub sort_projects_list {
5186         my ($projlist, $order) = @_;
5187         my @projects;
5188
5189         my %order_info = (
5190                 project => { key => 'path', type => 'str' },
5191                 descr => { key => 'descr_long', type => 'str' },
5192                 owner => { key => 'owner', type => 'str' },
5193                 age => { key => 'age', type => 'num' }
5194         );
5195         my $oi = $order_info{$order};
5196         return @$projlist unless defined $oi;
5197         if ($oi->{'type'} eq 'str') {
5198                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5199         } else {
5200                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5201         }
5202
5203         return @projects;
5204 }
5205
5206 # returns a hash of categories, containing the list of project
5207 # belonging to each category
5208 sub build_projlist_by_category {
5209         my ($projlist, $from, $to) = @_;
5210         my %categories;
5211
5212         $from = 0 unless defined $from;
5213         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5214
5215         for (my $i = $from; $i <= $to; $i++) {
5216                 my $pr = $projlist->[$i];
5217                 push @{$categories{ $pr->{'category'} }}, $pr;
5218         }
5219
5220         return wantarray ? %categories : \%categories;
5221 }
5222
5223 # print 'sort by' <th> element, generating 'sort by $name' replay link
5224 # if that order is not selected
5225 sub print_sort_th {
5226         print format_sort_th(@_);
5227 }
5228
5229 sub format_sort_th {
5230         my ($name, $order, $header) = @_;
5231         my $sort_th = "";
5232         $header ||= ucfirst($name);
5233
5234         if ($order eq $name) {
5235                 $sort_th .= "<th>$header</th>\n";
5236         } else {
5237                 $sort_th .= "<th>" .
5238                             $cgi->a({-href => href(-replay=>1, order=>$name),
5239                                      -class => "header"}, $header) .
5240                             "</th>\n";
5241         }
5242
5243         return $sort_th;
5244 }
5245
5246 sub git_project_list_rows {
5247         my ($projlist, $from, $to, $check_forks) = @_;
5248
5249         $from = 0 unless defined $from;
5250         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5251
5252         my $alternate = 1;
5253         for (my $i = $from; $i <= $to; $i++) {
5254                 my $pr = $projlist->[$i];
5255
5256                 if ($alternate) {
5257                         print "<tr class=\"dark\">\n";
5258                 } else {
5259                         print "<tr class=\"light\">\n";
5260                 }
5261                 $alternate ^= 1;
5262
5263                 if ($check_forks) {
5264                         print "<td>";
5265                         if ($pr->{'forks'}) {
5266                                 my $nforks = scalar @{$pr->{'forks'}};
5267                                 if ($nforks > 0) {
5268                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5269                                                        -title => "$nforks forks"}, "+");
5270                                 } else {
5271                                         print $cgi->span({-title => "$nforks forks"}, "+");
5272                                 }
5273                         }
5274                         print "</td>\n";
5275                 }
5276                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5277                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5278                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5279                                         -class => "list", -title => $pr->{'descr_long'}},
5280                                         esc_html($pr->{'descr'})) . "</td>\n" .
5281                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5282                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5283                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5284                       "<td class=\"link\">" .
5285                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5286                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5287                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5288                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5289                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5290                       "</td>\n" .
5291                       "</tr>\n";
5292         }
5293 }
5294
5295 sub git_project_list_body {
5296         # actually uses global variable $project
5297         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5298         my @projects = @$projlist;
5299
5300         my $check_forks = gitweb_check_feature('forks');
5301         my $show_ctags  = gitweb_check_feature('ctags');
5302         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
5303         $check_forks = undef
5304                 if ($tagfilter || $searchtext);
5305
5306         # filtering out forks before filling info allows to do less work
5307         @projects = filter_forks_from_projects_list(\@projects)
5308                 if ($check_forks);
5309         @projects = fill_project_list_info(\@projects);
5310         # searching projects require filling to be run before it
5311         @projects = search_projects_list(\@projects,
5312                                          'searchtext' => $searchtext,
5313                                          'tagfilter'  => $tagfilter)
5314                 if ($tagfilter || $searchtext);
5315
5316         $order ||= $default_projects_order;
5317         $from = 0 unless defined $from;
5318         $to = $#projects if (!defined $to || $#projects < $to);
5319
5320         # short circuit
5321         if ($from > $to) {
5322                 print "<center>\n".
5323                       "<b>No such projects found</b><br />\n".
5324                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5325                       "</center>\n<br />\n";
5326                 return;
5327         }
5328
5329         @projects = sort_projects_list(\@projects, $order);
5330
5331         if ($show_ctags) {
5332                 my $ctags = git_gather_all_ctags(\@projects);
5333                 my $cloud = git_populate_project_tagcloud($ctags);
5334                 print git_show_project_tagcloud($cloud, 64);
5335         }
5336
5337         print "<table class=\"project_list\">\n";
5338         unless ($no_header) {
5339                 print "<tr>\n";
5340                 if ($check_forks) {
5341                         print "<th></th>\n";
5342                 }
5343                 print_sort_th('project', $order, 'Project');
5344                 print_sort_th('descr', $order, 'Description');
5345                 print_sort_th('owner', $order, 'Owner');
5346                 print_sort_th('age', $order, 'Last Change');
5347                 print "<th></th>\n" . # for links
5348                       "</tr>\n";
5349         }
5350
5351         if ($projects_list_group_categories) {
5352                 # only display categories with projects in the $from-$to window
5353                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5354                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5355                 foreach my $cat (sort keys %categories) {
5356                         unless ($cat eq "") {
5357                                 print "<tr>\n";
5358                                 if ($check_forks) {
5359                                         print "<td></td>\n";
5360                                 }
5361                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5362                                 print "</tr>\n";
5363                         }
5364
5365                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5366                 }
5367         } else {
5368                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5369         }
5370
5371         if (defined $extra) {
5372                 print "<tr>\n";
5373                 if ($check_forks) {
5374                         print "<td></td>\n";
5375                 }
5376                 print "<td colspan=\"5\">$extra</td>\n" .
5377                       "</tr>\n";
5378         }
5379         print "</table>\n";
5380 }
5381
5382 sub git_log_body {
5383         # uses global variable $project
5384         my ($commitlist, $from, $to, $refs, $extra) = @_;
5385
5386         $from = 0 unless defined $from;
5387         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5388
5389         for (my $i = 0; $i <= $to; $i++) {
5390                 my %co = %{$commitlist->[$i]};
5391                 next if !%co;
5392                 my $commit = $co{'id'};
5393                 my $ref = format_ref_marker($refs, $commit);
5394                 git_print_header_div('commit',
5395                                "<span class=\"age\">$co{'age_string'}</span>" .
5396                                esc_html($co{'title'}) . $ref,
5397                                $commit);
5398                 print "<div class=\"title_text\">\n" .
5399                       "<div class=\"log_link\">\n" .
5400                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5401                       " | " .
5402                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5403                       " | " .
5404                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5405                       "<br/>\n" .
5406                       "</div>\n";
5407                       git_print_authorship(\%co, -tag => 'span');
5408                       print "<br/>\n</div>\n";
5409
5410                 print "<div class=\"log_body\">\n";
5411                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5412                 print "</div>\n";
5413         }
5414         if ($extra) {
5415                 print "<div class=\"page_nav\">\n";
5416                 print "$extra\n";
5417                 print "</div>\n";
5418         }
5419 }
5420
5421 sub git_shortlog_body {
5422         # uses global variable $project
5423         my ($commitlist, $from, $to, $refs, $extra) = @_;
5424
5425         $from = 0 unless defined $from;
5426         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5427
5428         print "<table class=\"shortlog\">\n";
5429         my $alternate = 1;
5430         for (my $i = $from; $i <= $to; $i++) {
5431                 my %co = %{$commitlist->[$i]};
5432                 my $commit = $co{'id'};
5433                 my $ref = format_ref_marker($refs, $commit);
5434                 if ($alternate) {
5435                         print "<tr class=\"dark\">\n";
5436                 } else {
5437                         print "<tr class=\"light\">\n";
5438                 }
5439                 $alternate ^= 1;
5440                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5441                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5442                       format_author_html('td', \%co, 10) . "<td>";
5443                 print format_subject_html($co{'title'}, $co{'title_short'},
5444                                           href(action=>"commit", hash=>$commit), $ref);
5445                 print "</td>\n" .
5446                       "<td class=\"link\">" .
5447                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5448                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5449                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5450                 my $snapshot_links = format_snapshot_links($commit);
5451                 if (defined $snapshot_links) {
5452                         print " | " . $snapshot_links;
5453                 }
5454                 print "</td>\n" .
5455                       "</tr>\n";
5456         }
5457         if (defined $extra) {
5458                 print "<tr>\n" .
5459                       "<td colspan=\"4\">$extra</td>\n" .
5460                       "</tr>\n";
5461         }
5462         print "</table>\n";
5463 }
5464
5465 sub git_history_body {
5466         # Warning: assumes constant type (blob or tree) during history
5467         my ($commitlist, $from, $to, $refs, $extra,
5468             $file_name, $file_hash, $ftype) = @_;
5469
5470         $from = 0 unless defined $from;
5471         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5472
5473         print "<table class=\"history\">\n";
5474         my $alternate = 1;
5475         for (my $i = $from; $i <= $to; $i++) {
5476                 my %co = %{$commitlist->[$i]};
5477                 if (!%co) {
5478                         next;
5479                 }
5480                 my $commit = $co{'id'};
5481
5482                 my $ref = format_ref_marker($refs, $commit);
5483
5484                 if ($alternate) {
5485                         print "<tr class=\"dark\">\n";
5486                 } else {
5487                         print "<tr class=\"light\">\n";
5488                 }
5489                 $alternate ^= 1;
5490                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5491         # shortlog:   format_author_html('td', \%co, 10)
5492                       format_author_html('td', \%co, 15, 3) . "<td>";
5493                 # originally git_history used chop_str($co{'title'}, 50)
5494                 print format_subject_html($co{'title'}, $co{'title_short'},
5495                                           href(action=>"commit", hash=>$commit), $ref);
5496                 print "</td>\n" .
5497                       "<td class=\"link\">" .
5498                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5499                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5500
5501                 if ($ftype eq 'blob') {
5502                         my $blob_current = $file_hash;
5503                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5504                         if (defined $blob_current && defined $blob_parent &&
5505                                         $blob_current ne $blob_parent) {
5506                                 print " | " .
5507                                         $cgi->a({-href => href(action=>"blobdiff",
5508                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5509                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5510                                                                file_name=>$file_name)},
5511                                                 "diff to current");
5512                         }
5513                 }
5514                 print "</td>\n" .
5515                       "</tr>\n";
5516         }
5517         if (defined $extra) {
5518                 print "<tr>\n" .
5519                       "<td colspan=\"4\">$extra</td>\n" .
5520                       "</tr>\n";
5521         }
5522         print "</table>\n";
5523 }
5524
5525 sub git_tags_body {
5526         # uses global variable $project
5527         my ($taglist, $from, $to, $extra) = @_;
5528         $from = 0 unless defined $from;
5529         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5530
5531         print "<table class=\"tags\">\n";
5532         my $alternate = 1;
5533         for (my $i = $from; $i <= $to; $i++) {
5534                 my $entry = $taglist->[$i];
5535                 my %tag = %$entry;
5536                 my $comment = $tag{'subject'};
5537                 my $comment_short;
5538                 if (defined $comment) {
5539                         $comment_short = chop_str($comment, 30, 5);
5540                 }
5541                 if ($alternate) {
5542                         print "<tr class=\"dark\">\n";
5543                 } else {
5544                         print "<tr class=\"light\">\n";
5545                 }
5546                 $alternate ^= 1;
5547                 if (defined $tag{'age'}) {
5548                         print "<td><i>$tag{'age'}</i></td>\n";
5549                 } else {
5550                         print "<td></td>\n";
5551                 }
5552                 print "<td>" .
5553                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5554                                -class => "list name"}, esc_html($tag{'name'})) .
5555                       "</td>\n" .
5556                       "<td>";
5557                 if (defined $comment) {
5558                         print format_subject_html($comment, $comment_short,
5559                                                   href(action=>"tag", hash=>$tag{'id'}));
5560                 }
5561                 print "</td>\n" .
5562                       "<td class=\"selflink\">";
5563                 if ($tag{'type'} eq "tag") {
5564                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5565                 } else {
5566                         print "&nbsp;";
5567                 }
5568                 print "</td>\n" .
5569                       "<td class=\"link\">" . " | " .
5570                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5571                 if ($tag{'reftype'} eq "commit") {
5572                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5573                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5574                 } elsif ($tag{'reftype'} eq "blob") {
5575                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5576                 }
5577                 print "</td>\n" .
5578                       "</tr>";
5579         }
5580         if (defined $extra) {
5581                 print "<tr>\n" .
5582                       "<td colspan=\"5\">$extra</td>\n" .
5583                       "</tr>\n";
5584         }
5585         print "</table>\n";
5586 }
5587
5588 sub git_heads_body {
5589         # uses global variable $project
5590         my ($headlist, $head, $from, $to, $extra) = @_;
5591         $from = 0 unless defined $from;
5592         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5593
5594         print "<table class=\"heads\">\n";
5595         my $alternate = 1;
5596         for (my $i = $from; $i <= $to; $i++) {
5597                 my $entry = $headlist->[$i];
5598                 my %ref = %$entry;
5599                 my $curr = $ref{'id'} eq $head;
5600                 if ($alternate) {
5601                         print "<tr class=\"dark\">\n";
5602                 } else {
5603                         print "<tr class=\"light\">\n";
5604                 }
5605                 $alternate ^= 1;
5606                 print "<td><i>$ref{'age'}</i></td>\n" .
5607                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5608                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5609                                -class => "list name"},esc_html($ref{'name'})) .
5610                       "</td>\n" .
5611                       "<td class=\"link\">" .
5612                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5613                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5614                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5615                       "</td>\n" .
5616                       "</tr>";
5617         }
5618         if (defined $extra) {
5619                 print "<tr>\n" .
5620                       "<td colspan=\"3\">$extra</td>\n" .
5621                       "</tr>\n";
5622         }
5623         print "</table>\n";
5624 }
5625
5626 # Display a single remote block
5627 sub git_remote_block {
5628         my ($remote, $rdata, $limit, $head) = @_;
5629
5630         my $heads = $rdata->{'heads'};
5631         my $fetch = $rdata->{'fetch'};
5632         my $push = $rdata->{'push'};
5633
5634         my $urls_table = "<table class=\"projects_list\">\n" ;
5635
5636         if (defined $fetch) {
5637                 if ($fetch eq $push) {
5638                         $urls_table .= format_repo_url("URL", $fetch);
5639                 } else {
5640                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5641                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5642                 }
5643         } elsif (defined $push) {
5644                 $urls_table .= format_repo_url("Push URL", $push);
5645         } else {
5646                 $urls_table .= format_repo_url("", "No remote URL");
5647         }
5648
5649         $urls_table .= "</table>\n";
5650
5651         my $dots;
5652         if (defined $limit && $limit < @$heads) {
5653                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5654         }
5655
5656         print $urls_table;
5657         git_heads_body($heads, $head, 0, $limit, $dots);
5658 }
5659
5660 # Display a list of remote names with the respective fetch and push URLs
5661 sub git_remotes_list {
5662         my ($remotedata, $limit) = @_;
5663         print "<table class=\"heads\">\n";
5664         my $alternate = 1;
5665         my @remotes = sort keys %$remotedata;
5666
5667         my $limited = $limit && $limit < @remotes;
5668
5669         $#remotes = $limit - 1 if $limited;
5670
5671         while (my $remote = shift @remotes) {
5672                 my $rdata = $remotedata->{$remote};
5673                 my $fetch = $rdata->{'fetch'};
5674                 my $push = $rdata->{'push'};
5675                 if ($alternate) {
5676                         print "<tr class=\"dark\">\n";
5677                 } else {
5678                         print "<tr class=\"light\">\n";
5679                 }
5680                 $alternate ^= 1;
5681                 print "<td>" .
5682                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5683                                -class=> "list name"},esc_html($remote)) .
5684                       "</td>";
5685                 print "<td class=\"link\">" .
5686                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5687                       " | " .
5688                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5689                       "</td>";
5690
5691                 print "</tr>\n";
5692         }
5693
5694         if ($limited) {
5695                 print "<tr>\n" .
5696                       "<td colspan=\"3\">" .
5697                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5698                       "</td>\n" . "</tr>\n";
5699         }
5700
5701         print "</table>";
5702 }
5703
5704 # Display remote heads grouped by remote, unless there are too many
5705 # remotes, in which case we only display the remote names
5706 sub git_remotes_body {
5707         my ($remotedata, $limit, $head) = @_;
5708         if ($limit and $limit < keys %$remotedata) {
5709                 git_remotes_list($remotedata, $limit);
5710         } else {
5711                 fill_remote_heads($remotedata);
5712                 while (my ($remote, $rdata) = each %$remotedata) {
5713                         git_print_section({-class=>"remote", -id=>$remote},
5714                                 ["remotes", $remote, $remote], sub {
5715                                         git_remote_block($remote, $rdata, $limit, $head);
5716                                 });
5717                 }
5718         }
5719 }
5720
5721 sub git_search_message {
5722         my %co = @_;
5723
5724         my $greptype;
5725         if ($searchtype eq 'commit') {
5726                 $greptype = "--grep=";
5727         } elsif ($searchtype eq 'author') {
5728                 $greptype = "--author=";
5729         } elsif ($searchtype eq 'committer') {
5730                 $greptype = "--committer=";
5731         }
5732         $greptype .= $searchtext;
5733         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5734                                        $greptype, '--regexp-ignore-case',
5735                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5736
5737         my $paging_nav = '';
5738         if ($page > 0) {
5739                 $paging_nav .=
5740                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5741                                 "first") .
5742                         " &sdot; " .
5743                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5744                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5745         } else {
5746                 $paging_nav .= "first &sdot; prev";
5747         }
5748         my $next_link = '';
5749         if ($#commitlist >= 100) {
5750                 $next_link =
5751                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5752                                  -accesskey => "n", -title => "Alt-n"}, "next");
5753                 $paging_nav .= " &sdot; $next_link";
5754         } else {
5755                 $paging_nav .= " &sdot; next";
5756         }
5757
5758         git_header_html();
5759
5760         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5761         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5762         if ($page == 0 && !@commitlist) {
5763                 print "<p>No match.</p>\n";
5764         } else {
5765                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5766         }
5767
5768         git_footer_html();
5769 }
5770
5771 sub git_search_changes {
5772         my %co = @_;
5773
5774         local $/ = "\n";
5775         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5776                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5777                 ($search_use_regexp ? '--pickaxe-regex' : ())
5778                         or die_error(500, "Open git-log failed");
5779
5780         git_header_html();
5781
5782         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5783         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5784
5785         print "<table class=\"pickaxe search\">\n";
5786         my $alternate = 1;
5787         undef %co;
5788         my @files;
5789         while (my $line = <$fd>) {
5790                 chomp $line;
5791                 next unless $line;
5792
5793                 my %set = parse_difftree_raw_line($line);
5794                 if (defined $set{'commit'}) {
5795                         # finish previous commit
5796                         if (%co) {
5797                                 print "</td>\n" .
5798                                       "<td class=\"link\">" .
5799                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5800                                               "commit") .
5801                                       " | " .
5802                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5803                                                              hash_base=>$co{'id'})},
5804                                               "tree") .
5805                                       "</td>\n" .
5806                                       "</tr>\n";
5807                         }
5808
5809                         if ($alternate) {
5810                                 print "<tr class=\"dark\">\n";
5811                         } else {
5812                                 print "<tr class=\"light\">\n";
5813                         }
5814                         $alternate ^= 1;
5815                         %co = parse_commit($set{'commit'});
5816                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5817                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5818                               "<td><i>$author</i></td>\n" .
5819                               "<td>" .
5820                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5821                                       -class => "list subject"},
5822                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5823                 } elsif (defined $set{'to_id'}) {
5824                         next if ($set{'to_id'} =~ m/^0{40}$/);
5825
5826                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5827                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5828                                       -class => "list"},
5829                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5830                               "<br/>\n";
5831                 }
5832         }
5833         close $fd;
5834
5835         # finish last commit (warning: repetition!)
5836         if (%co) {
5837                 print "</td>\n" .
5838                       "<td class=\"link\">" .
5839                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5840                               "commit") .
5841                       " | " .
5842                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5843                                              hash_base=>$co{'id'})},
5844                               "tree") .
5845                       "</td>\n" .
5846                       "</tr>\n";
5847         }
5848
5849         print "</table>\n";
5850
5851         git_footer_html();
5852 }
5853
5854 sub git_search_files {
5855         my %co = @_;
5856
5857         local $/ = "\n";
5858         open my $fd, "-|", git_cmd(), 'grep', '-n',
5859                 $search_use_regexp ? ('-E', '-i') : '-F',
5860                 $searchtext, $co{'tree'}
5861                         or die_error(500, "Open git-grep failed");
5862
5863         git_header_html();
5864
5865         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5866         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5867
5868         print "<table class=\"grep_search\">\n";
5869         my $alternate = 1;
5870         my $matches = 0;
5871         my $lastfile = '';
5872         while (my $line = <$fd>) {
5873                 chomp $line;
5874                 my ($file, $lno, $ltext, $binary);
5875                 last if ($matches++ > 1000);
5876                 if ($line =~ /^Binary file (.+) matches$/) {
5877                         $file = $1;
5878                         $binary = 1;
5879                 } else {
5880                         (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5881                 }
5882                 if ($file ne $lastfile) {
5883                         $lastfile and print "</td></tr>\n";
5884                         if ($alternate++) {
5885                                 print "<tr class=\"dark\">\n";
5886                         } else {
5887                                 print "<tr class=\"light\">\n";
5888                         }
5889                         print "<td class=\"list\">".
5890                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5891                                                        file_name=>"$file"),
5892                                         -class => "list"}, esc_path($file));
5893                         print "</td><td>\n";
5894                         $lastfile = $file;
5895                 }
5896                 if ($binary) {
5897                         print "<div class=\"binary\">Binary file</div>\n";
5898                 } else {
5899                         $ltext = untabify($ltext);
5900                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5901                                 $ltext = esc_html($1, -nbsp=>1);
5902                                 $ltext .= '<span class="match">';
5903                                 $ltext .= esc_html($2, -nbsp=>1);
5904                                 $ltext .= '</span>';
5905                                 $ltext .= esc_html($3, -nbsp=>1);
5906                         } else {
5907                                 $ltext = esc_html($ltext, -nbsp=>1);
5908                         }
5909                         print "<div class=\"pre\">" .
5910                                 $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5911                                                        file_name=>"$file").'#l'.$lno,
5912                                         -class => "linenr"}, sprintf('%4i', $lno))
5913                                 . ' ' .  $ltext . "</div>\n";
5914                 }
5915         }
5916         if ($lastfile) {
5917                 print "</td></tr>\n";
5918                 if ($matches > 1000) {
5919                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5920                 }
5921         } else {
5922                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5923         }
5924         close $fd;
5925
5926         print "</table>\n";
5927
5928         git_footer_html();
5929 }
5930
5931 sub git_search_grep_body {
5932         my ($commitlist, $from, $to, $extra) = @_;
5933         $from = 0 unless defined $from;
5934         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5935
5936         print "<table class=\"commit_search\">\n";
5937         my $alternate = 1;
5938         for (my $i = $from; $i <= $to; $i++) {
5939                 my %co = %{$commitlist->[$i]};
5940                 if (!%co) {
5941                         next;
5942                 }
5943                 my $commit = $co{'id'};
5944                 if ($alternate) {
5945                         print "<tr class=\"dark\">\n";
5946                 } else {
5947                         print "<tr class=\"light\">\n";
5948                 }
5949                 $alternate ^= 1;
5950                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5951                       format_author_html('td', \%co, 15, 5) .
5952                       "<td>" .
5953                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5954                                -class => "list subject"},
5955                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5956                 my $comment = $co{'comment'};
5957                 foreach my $line (@$comment) {
5958                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5959                                 my ($lead, $match, $trail) = ($1, $2, $3);
5960                                 $match = chop_str($match, 70, 5, 'center');
5961                                 my $contextlen = int((80 - length($match))/2);
5962                                 $contextlen = 30 if ($contextlen > 30);
5963                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5964                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5965
5966                                 $lead  = esc_html($lead);
5967                                 $match = esc_html($match);
5968                                 $trail = esc_html($trail);
5969
5970                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5971                         }
5972                 }
5973                 print "</td>\n" .
5974                       "<td class=\"link\">" .
5975                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5976                       " | " .
5977                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5978                       " | " .
5979                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5980                 print "</td>\n" .
5981                       "</tr>\n";
5982         }
5983         if (defined $extra) {
5984                 print "<tr>\n" .
5985                       "<td colspan=\"3\">$extra</td>\n" .
5986                       "</tr>\n";
5987         }
5988         print "</table>\n";
5989 }
5990
5991 ## ======================================================================
5992 ## ======================================================================
5993 ## actions
5994
5995 sub git_project_list {
5996         my $order = $input_params{'order'};
5997         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5998                 die_error(400, "Unknown order parameter");
5999         }
6000
6001         my @list = git_get_projects_list();
6002         if (!@list) {
6003                 die_error(404, "No projects found");
6004         }
6005
6006         git_header_html();
6007         if (defined $home_text && -f $home_text) {
6008                 print "<div class=\"index_include\">\n";
6009                 insert_file($home_text);
6010                 print "</div>\n";
6011         }
6012         print $cgi->startform(-method => "get") .
6013               "<p class=\"projsearch\">Search:\n" .
6014               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
6015               "</p>" .
6016               $cgi->end_form() . "\n";
6017         git_project_list_body(\@list, $order);
6018         git_footer_html();
6019 }
6020
6021 sub git_forks {
6022         my $order = $input_params{'order'};
6023         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6024                 die_error(400, "Unknown order parameter");
6025         }
6026
6027         my @list = git_get_projects_list($project);
6028         if (!@list) {
6029                 die_error(404, "No forks found");
6030         }
6031
6032         git_header_html();
6033         git_print_page_nav('','');
6034         git_print_header_div('summary', "$project forks");
6035         git_project_list_body(\@list, $order);
6036         git_footer_html();
6037 }
6038
6039 sub git_project_index {
6040         my @projects = git_get_projects_list();
6041         if (!@projects) {
6042                 die_error(404, "No projects found");
6043         }
6044
6045         print $cgi->header(
6046                 -type => 'text/plain',
6047                 -charset => 'utf-8',
6048                 -content_disposition => 'inline; filename="index.aux"');
6049
6050         foreach my $pr (@projects) {
6051                 if (!exists $pr->{'owner'}) {
6052                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6053                 }
6054
6055                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6056                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6057                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6058                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6059                 $path  =~ s/ /\+/g;
6060                 $owner =~ s/ /\+/g;
6061
6062                 print "$path $owner\n";
6063         }
6064 }
6065
6066 sub git_summary {
6067         my $descr = git_get_project_description($project) || "none";
6068         my %co = parse_commit("HEAD");
6069         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6070         my $head = $co{'id'};
6071         my $remote_heads = gitweb_check_feature('remote_heads');
6072
6073         my $owner = git_get_project_owner($project);
6074
6075         my $refs = git_get_references();
6076         # These get_*_list functions return one more to allow us to see if
6077         # there are more ...
6078         my @taglist  = git_get_tags_list(16);
6079         my @headlist = git_get_heads_list(16);
6080         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6081         my @forklist;
6082         my $check_forks = gitweb_check_feature('forks');
6083
6084         if ($check_forks) {
6085                 # find forks of a project
6086                 @forklist = git_get_projects_list($project);
6087                 # filter out forks of forks
6088                 @forklist = filter_forks_from_projects_list(\@forklist)
6089                         if (@forklist);
6090         }
6091
6092         git_header_html();
6093         git_print_page_nav('summary','', $head);
6094
6095         print "<div class=\"title\">&nbsp;</div>\n";
6096         print "<table class=\"projects_list\">\n" .
6097               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6098               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6099         if (defined $cd{'rfc2822'}) {
6100                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6101                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6102         }
6103
6104         # use per project git URL list in $projectroot/$project/cloneurl
6105         # or make project git URL from git base URL and project name
6106         my $url_tag = "URL";
6107         my @url_list = git_get_project_url_list($project);
6108         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6109         foreach my $git_url (@url_list) {
6110                 next unless $git_url;
6111                 print format_repo_url($url_tag, $git_url);
6112                 $url_tag = "";
6113         }
6114
6115         # Tag cloud
6116         my $show_ctags = gitweb_check_feature('ctags');
6117         if ($show_ctags) {
6118                 my $ctags = git_get_project_ctags($project);
6119                 if (%$ctags) {
6120                         # without ability to add tags, don't show if there are none
6121                         my $cloud = git_populate_project_tagcloud($ctags);
6122                         print "<tr id=\"metadata_ctags\">" .
6123                               "<td>content tags</td>" .
6124                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6125                               "</tr>\n";
6126                 }
6127         }
6128
6129         print "</table>\n";
6130
6131         # If XSS prevention is on, we don't include README.html.
6132         # TODO: Allow a readme in some safe format.
6133         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6134                 print "<div class=\"title\">readme</div>\n" .
6135                       "<div class=\"readme\">\n";
6136                 insert_file("$projectroot/$project/README.html");
6137                 print "\n</div>\n"; # class="readme"
6138         }
6139
6140         # we need to request one more than 16 (0..15) to check if
6141         # those 16 are all
6142         my @commitlist = $head ? parse_commits($head, 17) : ();
6143         if (@commitlist) {
6144                 git_print_header_div('shortlog');
6145                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6146                                   $#commitlist <=  15 ? undef :
6147                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6148         }
6149
6150         if (@taglist) {
6151                 git_print_header_div('tags');
6152                 git_tags_body(\@taglist, 0, 15,
6153                               $#taglist <=  15 ? undef :
6154                               $cgi->a({-href => href(action=>"tags")}, "..."));
6155         }
6156
6157         if (@headlist) {
6158                 git_print_header_div('heads');
6159                 git_heads_body(\@headlist, $head, 0, 15,
6160                                $#headlist <= 15 ? undef :
6161                                $cgi->a({-href => href(action=>"heads")}, "..."));
6162         }
6163
6164         if (%remotedata) {
6165                 git_print_header_div('remotes');
6166                 git_remotes_body(\%remotedata, 15, $head);
6167         }
6168
6169         if (@forklist) {
6170                 git_print_header_div('forks');
6171                 git_project_list_body(\@forklist, 'age', 0, 15,
6172                                       $#forklist <= 15 ? undef :
6173                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6174                                       'no_header');
6175         }
6176
6177         git_footer_html();
6178 }
6179
6180 sub git_tag {
6181         my %tag = parse_tag($hash);
6182
6183         if (! %tag) {
6184                 die_error(404, "Unknown tag object");
6185         }
6186
6187         my $head = git_get_head_hash($project);
6188         git_header_html();
6189         git_print_page_nav('','', $head,undef,$head);
6190         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6191         print "<div class=\"title_text\">\n" .
6192               "<table class=\"object_header\">\n" .
6193               "<tr>\n" .
6194               "<td>object</td>\n" .
6195               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6196                                $tag{'object'}) . "</td>\n" .
6197               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6198                                               $tag{'type'}) . "</td>\n" .
6199               "</tr>\n";
6200         if (defined($tag{'author'})) {
6201                 git_print_authorship_rows(\%tag, 'author');
6202         }
6203         print "</table>\n\n" .
6204               "</div>\n";
6205         print "<div class=\"page_body\">";
6206         my $comment = $tag{'comment'};
6207         foreach my $line (@$comment) {
6208                 chomp $line;
6209                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6210         }
6211         print "</div>\n";
6212         git_footer_html();
6213 }
6214
6215 sub git_blame_common {
6216         my $format = shift || 'porcelain';
6217         if ($format eq 'porcelain' && $cgi->param('js')) {
6218                 $format = 'incremental';
6219                 $action = 'blame_incremental'; # for page title etc
6220         }
6221
6222         # permissions
6223         gitweb_check_feature('blame')
6224                 or die_error(403, "Blame view not allowed");
6225
6226         # error checking
6227         die_error(400, "No file name given") unless $file_name;
6228         $hash_base ||= git_get_head_hash($project);
6229         die_error(404, "Couldn't find base commit") unless $hash_base;
6230         my %co = parse_commit($hash_base)
6231                 or die_error(404, "Commit not found");
6232         my $ftype = "blob";
6233         if (!defined $hash) {
6234                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6235                         or die_error(404, "Error looking up file");
6236         } else {
6237                 $ftype = git_get_type($hash);
6238                 if ($ftype !~ "blob") {
6239                         die_error(400, "Object is not a blob");
6240                 }
6241         }
6242
6243         my $fd;
6244         if ($format eq 'incremental') {
6245                 # get file contents (as base)
6246                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6247                         or die_error(500, "Open git-cat-file failed");
6248         } elsif ($format eq 'data') {
6249                 # run git-blame --incremental
6250                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6251                         $hash_base, "--", $file_name
6252                         or die_error(500, "Open git-blame --incremental failed");
6253         } else {
6254                 # run git-blame --porcelain
6255                 open $fd, "-|", git_cmd(), "blame", '-p',
6256                         $hash_base, '--', $file_name
6257                         or die_error(500, "Open git-blame --porcelain failed");
6258         }
6259
6260         # incremental blame data returns early
6261         if ($format eq 'data') {
6262                 print $cgi->header(
6263                         -type=>"text/plain", -charset => "utf-8",
6264                         -status=> "200 OK");
6265                 local $| = 1; # output autoflush
6266                 while (my $line = <$fd>) {
6267                         print to_utf8($line);
6268                 }
6269                 close $fd
6270                         or print "ERROR $!\n";
6271
6272                 print 'END';
6273                 if (defined $t0 && gitweb_check_feature('timed')) {
6274                         print ' '.
6275                               tv_interval($t0, [ gettimeofday() ]).
6276                               ' '.$number_of_git_cmds;
6277                 }
6278                 print "\n";
6279
6280                 return;
6281         }
6282
6283         # page header
6284         git_header_html();
6285         my $formats_nav =
6286                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6287                         "blob") .
6288                 " | ";
6289         if ($format eq 'incremental') {
6290                 $formats_nav .=
6291                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6292                                 "blame") . " (non-incremental)";
6293         } else {
6294                 $formats_nav .=
6295                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6296                                 "blame") . " (incremental)";
6297         }
6298         $formats_nav .=
6299                 " | " .
6300                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6301                         "history") .
6302                 " | " .
6303                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6304                         "HEAD");
6305         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6306         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6307         git_print_page_path($file_name, $ftype, $hash_base);
6308
6309         # page body
6310         if ($format eq 'incremental') {
6311                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6312                       "This page requires JavaScript to run.\n Use ".
6313                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6314                               'this page').
6315                       " instead.\n".
6316                       "</b></center></div>\n</noscript>\n";
6317
6318                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6319         }
6320
6321         print qq!<div class="page_body">\n!;
6322         print qq!<div id="progress_info">... / ...</div>\n!
6323                 if ($format eq 'incremental');
6324         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6325               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6326               qq!<thead>\n!.
6327               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6328               qq!</thead>\n!.
6329               qq!<tbody>\n!;
6330
6331         my @rev_color = qw(light dark);
6332         my $num_colors = scalar(@rev_color);
6333         my $current_color = 0;
6334
6335         if ($format eq 'incremental') {
6336                 my $color_class = $rev_color[$current_color];
6337
6338                 #contents of a file
6339                 my $linenr = 0;
6340         LINE:
6341                 while (my $line = <$fd>) {
6342                         chomp $line;
6343                         $linenr++;
6344
6345                         print qq!<tr id="l$linenr" class="$color_class">!.
6346                               qq!<td class="sha1"><a href=""> </a></td>!.
6347                               qq!<td class="linenr">!.
6348                               qq!<a class="linenr" href="">$linenr</a></td>!;
6349                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6350                         print qq!</tr>\n!;
6351                 }
6352
6353         } else { # porcelain, i.e. ordinary blame
6354                 my %metainfo = (); # saves information about commits
6355
6356                 # blame data
6357         LINE:
6358                 while (my $line = <$fd>) {
6359                         chomp $line;
6360                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6361                         # no <lines in group> for subsequent lines in group of lines
6362                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6363                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6364                         if (!exists $metainfo{$full_rev}) {
6365                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6366                         }
6367                         my $meta = $metainfo{$full_rev};
6368                         my $data;
6369                         while ($data = <$fd>) {
6370                                 chomp $data;
6371                                 last if ($data =~ s/^\t//); # contents of line
6372                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6373                                         $meta->{$1} = $2 unless exists $meta->{$1};
6374                                 }
6375                                 if ($data =~ /^previous /) {
6376                                         $meta->{'nprevious'}++;
6377                                 }
6378                         }
6379                         my $short_rev = substr($full_rev, 0, 8);
6380                         my $author = $meta->{'author'};
6381                         my %date =
6382                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6383                         my $date = $date{'iso-tz'};
6384                         if ($group_size) {
6385                                 $current_color = ($current_color + 1) % $num_colors;
6386                         }
6387                         my $tr_class = $rev_color[$current_color];
6388                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6389                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6390                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6391                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6392                         if ($group_size) {
6393                                 print "<td class=\"sha1\"";
6394                                 print " title=\"". esc_html($author) . ", $date\"";
6395                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6396                                 print ">";
6397                                 print $cgi->a({-href => href(action=>"commit",
6398                                                              hash=>$full_rev,
6399                                                              file_name=>$file_name)},
6400                                               esc_html($short_rev));
6401                                 if ($group_size >= 2) {
6402                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6403                                         if (@author_initials) {
6404                                                 print "<br />" .
6405                                                       esc_html(join('', @author_initials));
6406                                                 #           or join('.', ...)
6407                                         }
6408                                 }
6409                                 print "</td>\n";
6410                         }
6411                         # 'previous' <sha1 of parent commit> <filename at commit>
6412                         if (exists $meta->{'previous'} &&
6413                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6414                                 $meta->{'parent'} = $1;
6415                                 $meta->{'file_parent'} = unquote($2);
6416                         }
6417                         my $linenr_commit =
6418                                 exists($meta->{'parent'}) ?
6419                                 $meta->{'parent'} : $full_rev;
6420                         my $linenr_filename =
6421                                 exists($meta->{'file_parent'}) ?
6422                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6423                         my $blamed = href(action => 'blame',
6424                                           file_name => $linenr_filename,
6425                                           hash_base => $linenr_commit);
6426                         print "<td class=\"linenr\">";
6427                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6428                                         -class => "linenr" },
6429                                       esc_html($lineno));
6430                         print "</td>";
6431                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6432                         print "</tr>\n";
6433                 } # end while
6434
6435         }
6436
6437         # footer
6438         print "</tbody>\n".
6439               "</table>\n"; # class="blame"
6440         print "</div>\n";   # class="blame_body"
6441         close $fd
6442                 or print "Reading blob failed\n";
6443
6444         git_footer_html();
6445 }
6446
6447 sub git_blame {
6448         git_blame_common();
6449 }
6450
6451 sub git_blame_incremental {
6452         git_blame_common('incremental');
6453 }
6454
6455 sub git_blame_data {
6456         git_blame_common('data');
6457 }
6458
6459 sub git_tags {
6460         my $head = git_get_head_hash($project);
6461         git_header_html();
6462         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6463         git_print_header_div('summary', $project);
6464
6465         my @tagslist = git_get_tags_list();
6466         if (@tagslist) {
6467                 git_tags_body(\@tagslist);
6468         }
6469         git_footer_html();
6470 }
6471
6472 sub git_heads {
6473         my $head = git_get_head_hash($project);
6474         git_header_html();
6475         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6476         git_print_header_div('summary', $project);
6477
6478         my @headslist = git_get_heads_list();
6479         if (@headslist) {
6480                 git_heads_body(\@headslist, $head);
6481         }
6482         git_footer_html();
6483 }
6484
6485 # used both for single remote view and for list of all the remotes
6486 sub git_remotes {
6487         gitweb_check_feature('remote_heads')
6488                 or die_error(403, "Remote heads view is disabled");
6489
6490         my $head = git_get_head_hash($project);
6491         my $remote = $input_params{'hash'};
6492
6493         my $remotedata = git_get_remotes_list($remote);
6494         die_error(500, "Unable to get remote information") unless defined $remotedata;
6495
6496         unless (%$remotedata) {
6497                 die_error(404, defined $remote ?
6498                         "Remote $remote not found" :
6499                         "No remotes found");
6500         }
6501
6502         git_header_html(undef, undef, -action_extra => $remote);
6503         git_print_page_nav('', '',  $head, undef, $head,
6504                 format_ref_views($remote ? '' : 'remotes'));
6505
6506         fill_remote_heads($remotedata);
6507         if (defined $remote) {
6508                 git_print_header_div('remotes', "$remote remote for $project");
6509                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6510         } else {
6511                 git_print_header_div('summary', "$project remotes");
6512                 git_remotes_body($remotedata, undef, $head);
6513         }
6514
6515         git_footer_html();
6516 }
6517
6518 sub git_blob_plain {
6519         my $type = shift;
6520         my $expires;
6521
6522         if (!defined $hash) {
6523                 if (defined $file_name) {
6524                         my $base = $hash_base || git_get_head_hash($project);
6525                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6526                                 or die_error(404, "Cannot find file");
6527                 } else {
6528                         die_error(400, "No file name defined");
6529                 }
6530         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6531                 # blobs defined by non-textual hash id's can be cached
6532                 $expires = "+1d";
6533         }
6534
6535         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6536                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6537
6538         # content-type (can include charset)
6539         $type = blob_contenttype($fd, $file_name, $type);
6540
6541         # "save as" filename, even when no $file_name is given
6542         my $save_as = "$hash";
6543         if (defined $file_name) {
6544                 $save_as = $file_name;
6545         } elsif ($type =~ m/^text\//) {
6546                 $save_as .= '.txt';
6547         }
6548
6549         # With XSS prevention on, blobs of all types except a few known safe
6550         # ones are served with "Content-Disposition: attachment" to make sure
6551         # they don't run in our security domain.  For certain image types,
6552         # blob view writes an <img> tag referring to blob_plain view, and we
6553         # want to be sure not to break that by serving the image as an
6554         # attachment (though Firefox 3 doesn't seem to care).
6555         my $sandbox = $prevent_xss &&
6556                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6557
6558         # serve text/* as text/plain
6559         if ($prevent_xss &&
6560             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6561              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6562                 my $rest = $1;
6563                 $rest = defined $rest ? $rest : '';
6564                 $type = "text/plain$rest";
6565         }
6566
6567         print $cgi->header(
6568                 -type => $type,
6569                 -expires => $expires,
6570                 -content_disposition =>
6571                         ($sandbox ? 'attachment' : 'inline')
6572                         . '; filename="' . $save_as . '"');
6573         local $/ = undef;
6574         binmode STDOUT, ':raw';
6575         print <$fd>;
6576         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6577         close $fd;
6578 }
6579
6580 sub git_blob {
6581         my $expires;
6582
6583         if (!defined $hash) {
6584                 if (defined $file_name) {
6585                         my $base = $hash_base || git_get_head_hash($project);
6586                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6587                                 or die_error(404, "Cannot find file");
6588                 } else {
6589                         die_error(400, "No file name defined");
6590                 }
6591         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6592                 # blobs defined by non-textual hash id's can be cached
6593                 $expires = "+1d";
6594         }
6595
6596         my $have_blame = gitweb_check_feature('blame');
6597         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6598                 or die_error(500, "Couldn't cat $file_name, $hash");
6599         my $mimetype = blob_mimetype($fd, $file_name);
6600         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6601         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6602                 close $fd;
6603                 return git_blob_plain($mimetype);
6604         }
6605         # we can have blame only for text/* mimetype
6606         $have_blame &&= ($mimetype =~ m!^text/!);
6607
6608         my $highlight = gitweb_check_feature('highlight');
6609         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6610         $fd = run_highlighter($fd, $highlight, $syntax)
6611                 if $syntax;
6612
6613         git_header_html(undef, $expires);
6614         my $formats_nav = '';
6615         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6616                 if (defined $file_name) {
6617                         if ($have_blame) {
6618                                 $formats_nav .=
6619                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6620                                                 "blame") .
6621                                         " | ";
6622                         }
6623                         $formats_nav .=
6624                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6625                                         "history") .
6626                                 " | " .
6627                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6628                                         "raw") .
6629                                 " | " .
6630                                 $cgi->a({-href => href(action=>"blob",
6631                                                        hash_base=>"HEAD", file_name=>$file_name)},
6632                                         "HEAD");
6633                 } else {
6634                         $formats_nav .=
6635                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6636                                         "raw");
6637                 }
6638                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6639                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6640         } else {
6641                 print "<div class=\"page_nav\">\n" .
6642                       "<br/><br/></div>\n" .
6643                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6644         }
6645         git_print_page_path($file_name, "blob", $hash_base);
6646         print "<div class=\"page_body\">\n";
6647         if ($mimetype =~ m!^image/!) {
6648                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6649                 if ($file_name) {
6650                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6651                 }
6652                 print qq! src="! .
6653                       href(action=>"blob_plain", hash=>$hash,
6654                            hash_base=>$hash_base, file_name=>$file_name) .
6655                       qq!" />\n!;
6656         } else {
6657                 my $nr;
6658                 while (my $line = <$fd>) {
6659                         chomp $line;
6660                         $nr++;
6661                         $line = untabify($line);
6662                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6663                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6664                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6665                 }
6666         }
6667         close $fd
6668                 or print "Reading blob failed.\n";
6669         print "</div>";
6670         git_footer_html();
6671 }
6672
6673 sub git_tree {
6674         if (!defined $hash_base) {
6675                 $hash_base = "HEAD";
6676         }
6677         if (!defined $hash) {
6678                 if (defined $file_name) {
6679                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6680                 } else {
6681                         $hash = $hash_base;
6682                 }
6683         }
6684         die_error(404, "No such tree") unless defined($hash);
6685
6686         my $show_sizes = gitweb_check_feature('show-sizes');
6687         my $have_blame = gitweb_check_feature('blame');
6688
6689         my @entries = ();
6690         {
6691                 local $/ = "\0";
6692                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6693                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6694                         or die_error(500, "Open git-ls-tree failed");
6695                 @entries = map { chomp; $_ } <$fd>;
6696                 close $fd
6697                         or die_error(404, "Reading tree failed");
6698         }
6699
6700         my $refs = git_get_references();
6701         my $ref = format_ref_marker($refs, $hash_base);
6702         git_header_html();
6703         my $basedir = '';
6704         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6705                 my @views_nav = ();
6706                 if (defined $file_name) {
6707                         push @views_nav,
6708                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6709                                         "history"),
6710                                 $cgi->a({-href => href(action=>"tree",
6711                                                        hash_base=>"HEAD", file_name=>$file_name)},
6712                                         "HEAD"),
6713                 }
6714                 my $snapshot_links = format_snapshot_links($hash);
6715                 if (defined $snapshot_links) {
6716                         # FIXME: Should be available when we have no hash base as well.
6717                         push @views_nav, $snapshot_links;
6718                 }
6719                 git_print_page_nav('tree','', $hash_base, undef, undef,
6720                                    join(' | ', @views_nav));
6721                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6722         } else {
6723                 undef $hash_base;
6724                 print "<div class=\"page_nav\">\n";
6725                 print "<br/><br/></div>\n";
6726                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6727         }
6728         if (defined $file_name) {
6729                 $basedir = $file_name;
6730                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6731                         $basedir .= '/';
6732                 }
6733                 git_print_page_path($file_name, 'tree', $hash_base);
6734         }
6735         print "<div class=\"page_body\">\n";
6736         print "<table class=\"tree\">\n";
6737         my $alternate = 1;
6738         # '..' (top directory) link if possible
6739         if (defined $hash_base &&
6740             defined $file_name && $file_name =~ m![^/]+$!) {
6741                 if ($alternate) {
6742                         print "<tr class=\"dark\">\n";
6743                 } else {
6744                         print "<tr class=\"light\">\n";
6745                 }
6746                 $alternate ^= 1;
6747
6748                 my $up = $file_name;
6749                 $up =~ s!/?[^/]+$!!;
6750                 undef $up unless $up;
6751                 # based on git_print_tree_entry
6752                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6753                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6754                 print '<td class="list">';
6755                 print $cgi->a({-href => href(action=>"tree",
6756                                              hash_base=>$hash_base,
6757                                              file_name=>$up)},
6758                               "..");
6759                 print "</td>\n";
6760                 print "<td class=\"link\"></td>\n";
6761
6762                 print "</tr>\n";
6763         }
6764         foreach my $line (@entries) {
6765                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6766
6767                 if ($alternate) {
6768                         print "<tr class=\"dark\">\n";
6769                 } else {
6770                         print "<tr class=\"light\">\n";
6771                 }
6772                 $alternate ^= 1;
6773
6774                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6775
6776                 print "</tr>\n";
6777         }
6778         print "</table>\n" .
6779               "</div>";
6780         git_footer_html();
6781 }
6782
6783 sub snapshot_name {
6784         my ($project, $hash) = @_;
6785
6786         # path/to/project.git  -> project
6787         # path/to/project/.git -> project
6788         my $name = to_utf8($project);
6789         $name =~ s,([^/])/*\.git$,$1,;
6790         $name = basename($name);
6791         # sanitize name
6792         $name =~ s/[[:cntrl:]]/?/g;
6793
6794         my $ver = $hash;
6795         if ($hash =~ /^[0-9a-fA-F]+$/) {
6796                 # shorten SHA-1 hash
6797                 my $full_hash = git_get_full_hash($project, $hash);
6798                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6799                         $ver = git_get_short_hash($project, $hash);
6800                 }
6801         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6802                 # tags don't need shortened SHA-1 hash
6803                 $ver = $1;
6804         } else {
6805                 # branches and other need shortened SHA-1 hash
6806                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6807                         $ver = $1;
6808                 }
6809                 $ver .= '-' . git_get_short_hash($project, $hash);
6810         }
6811         # in case of hierarchical branch names
6812         $ver =~ s!/!.!g;
6813
6814         # name = project-version_string
6815         $name = "$name-$ver";
6816
6817         return wantarray ? ($name, $name) : $name;
6818 }
6819
6820 sub git_snapshot {
6821         my $format = $input_params{'snapshot_format'};
6822         if (!@snapshot_fmts) {
6823                 die_error(403, "Snapshots not allowed");
6824         }
6825         # default to first supported snapshot format
6826         $format ||= $snapshot_fmts[0];
6827         if ($format !~ m/^[a-z0-9]+$/) {
6828                 die_error(400, "Invalid snapshot format parameter");
6829         } elsif (!exists($known_snapshot_formats{$format})) {
6830                 die_error(400, "Unknown snapshot format");
6831         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6832                 die_error(403, "Snapshot format not allowed");
6833         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6834                 die_error(403, "Unsupported snapshot format");
6835         }
6836
6837         my $type = git_get_type("$hash^{}");
6838         if (!$type) {
6839                 die_error(404, 'Object does not exist');
6840         }  elsif ($type eq 'blob') {
6841                 die_error(400, 'Object is not a tree-ish');
6842         }
6843
6844         my ($name, $prefix) = snapshot_name($project, $hash);
6845         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6846         my $cmd = quote_command(
6847                 git_cmd(), 'archive',
6848                 "--format=$known_snapshot_formats{$format}{'format'}",
6849                 "--prefix=$prefix/", $hash);
6850         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6851                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6852         }
6853
6854         $filename =~ s/(["\\])/\\$1/g;
6855         print $cgi->header(
6856                 -type => $known_snapshot_formats{$format}{'type'},
6857                 -content_disposition => 'inline; filename="' . $filename . '"',
6858                 -status => '200 OK');
6859
6860         open my $fd, "-|", $cmd
6861                 or die_error(500, "Execute git-archive failed");
6862         binmode STDOUT, ':raw';
6863         print <$fd>;
6864         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6865         close $fd;
6866 }
6867
6868 sub git_log_generic {
6869         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6870
6871         my $head = git_get_head_hash($project);
6872         if (!defined $base) {
6873                 $base = $head;
6874         }
6875         if (!defined $page) {
6876                 $page = 0;
6877         }
6878         my $refs = git_get_references();
6879
6880         my $commit_hash = $base;
6881         if (defined $parent) {
6882                 $commit_hash = "$parent..$base";
6883         }
6884         my @commitlist =
6885                 parse_commits($commit_hash, 101, (100 * $page),
6886                               defined $file_name ? ($file_name, "--full-history") : ());
6887
6888         my $ftype;
6889         if (!defined $file_hash && defined $file_name) {
6890                 # some commits could have deleted file in question,
6891                 # and not have it in tree, but one of them has to have it
6892                 for (my $i = 0; $i < @commitlist; $i++) {
6893                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6894                         last if defined $file_hash;
6895                 }
6896         }
6897         if (defined $file_hash) {
6898                 $ftype = git_get_type($file_hash);
6899         }
6900         if (defined $file_name && !defined $ftype) {
6901                 die_error(500, "Unknown type of object");
6902         }
6903         my %co;
6904         if (defined $file_name) {
6905                 %co = parse_commit($base)
6906                         or die_error(404, "Unknown commit object");
6907         }
6908
6909
6910         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6911         my $next_link = '';
6912         if ($#commitlist >= 100) {
6913                 $next_link =
6914                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6915                                  -accesskey => "n", -title => "Alt-n"}, "next");
6916         }
6917         my $patch_max = gitweb_get_feature('patches');
6918         if ($patch_max && !defined $file_name) {
6919                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6920                         $paging_nav .= " &sdot; " .
6921                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6922                                         "patches");
6923                 }
6924         }
6925
6926         git_header_html();
6927         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6928         if (defined $file_name) {
6929                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6930         } else {
6931                 git_print_header_div('summary', $project)
6932         }
6933         git_print_page_path($file_name, $ftype, $hash_base)
6934                 if (defined $file_name);
6935
6936         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6937                      $file_name, $file_hash, $ftype);
6938
6939         git_footer_html();
6940 }
6941
6942 sub git_log {
6943         git_log_generic('log', \&git_log_body,
6944                         $hash, $hash_parent);
6945 }
6946
6947 sub git_commit {
6948         $hash ||= $hash_base || "HEAD";
6949         my %co = parse_commit($hash)
6950             or die_error(404, "Unknown commit object");
6951
6952         my $parent  = $co{'parent'};
6953         my $parents = $co{'parents'}; # listref
6954
6955         # we need to prepare $formats_nav before any parameter munging
6956         my $formats_nav;
6957         if (!defined $parent) {
6958                 # --root commitdiff
6959                 $formats_nav .= '(initial)';
6960         } elsif (@$parents == 1) {
6961                 # single parent commit
6962                 $formats_nav .=
6963                         '(parent: ' .
6964                         $cgi->a({-href => href(action=>"commit",
6965                                                hash=>$parent)},
6966                                 esc_html(substr($parent, 0, 7))) .
6967                         ')';
6968         } else {
6969                 # merge commit
6970                 $formats_nav .=
6971                         '(merge: ' .
6972                         join(' ', map {
6973                                 $cgi->a({-href => href(action=>"commit",
6974                                                        hash=>$_)},
6975                                         esc_html(substr($_, 0, 7)));
6976                         } @$parents ) .
6977                         ')';
6978         }
6979         if (gitweb_check_feature('patches') && @$parents <= 1) {
6980                 $formats_nav .= " | " .
6981                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6982                                 "patch");
6983         }
6984
6985         if (!defined $parent) {
6986                 $parent = "--root";
6987         }
6988         my @difftree;
6989         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6990                 @diff_opts,
6991                 (@$parents <= 1 ? $parent : '-c'),
6992                 $hash, "--"
6993                 or die_error(500, "Open git-diff-tree failed");
6994         @difftree = map { chomp; $_ } <$fd>;
6995         close $fd or die_error(404, "Reading git-diff-tree failed");
6996
6997         # non-textual hash id's can be cached
6998         my $expires;
6999         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7000                 $expires = "+1d";
7001         }
7002         my $refs = git_get_references();
7003         my $ref = format_ref_marker($refs, $co{'id'});
7004
7005         git_header_html(undef, $expires);
7006         git_print_page_nav('commit', '',
7007                            $hash, $co{'tree'}, $hash,
7008                            $formats_nav);
7009
7010         if (defined $co{'parent'}) {
7011                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7012         } else {
7013                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7014         }
7015         print "<div class=\"title_text\">\n" .
7016               "<table class=\"object_header\">\n";
7017         git_print_authorship_rows(\%co);
7018         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7019         print "<tr>" .
7020               "<td>tree</td>" .
7021               "<td class=\"sha1\">" .
7022               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7023                        class => "list"}, $co{'tree'}) .
7024               "</td>" .
7025               "<td class=\"link\">" .
7026               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7027                       "tree");
7028         my $snapshot_links = format_snapshot_links($hash);
7029         if (defined $snapshot_links) {
7030                 print " | " . $snapshot_links;
7031         }
7032         print "</td>" .
7033               "</tr>\n";
7034
7035         foreach my $par (@$parents) {
7036                 print "<tr>" .
7037                       "<td>parent</td>" .
7038                       "<td class=\"sha1\">" .
7039                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7040                                class => "list"}, $par) .
7041                       "</td>" .
7042                       "<td class=\"link\">" .
7043                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7044                       " | " .
7045                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7046                       "</td>" .
7047                       "</tr>\n";
7048         }
7049         print "</table>".
7050               "</div>\n";
7051
7052         print "<div class=\"page_body\">\n";
7053         git_print_log($co{'comment'});
7054         print "</div>\n";
7055
7056         git_difftree_body(\@difftree, $hash, @$parents);
7057
7058         git_footer_html();
7059 }
7060
7061 sub git_object {
7062         # object is defined by:
7063         # - hash or hash_base alone
7064         # - hash_base and file_name
7065         my $type;
7066
7067         # - hash or hash_base alone
7068         if ($hash || ($hash_base && !defined $file_name)) {
7069                 my $object_id = $hash || $hash_base;
7070
7071                 open my $fd, "-|", quote_command(
7072                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7073                         or die_error(404, "Object does not exist");
7074                 $type = <$fd>;
7075                 chomp $type;
7076                 close $fd
7077                         or die_error(404, "Object does not exist");
7078
7079         # - hash_base and file_name
7080         } elsif ($hash_base && defined $file_name) {
7081                 $file_name =~ s,/+$,,;
7082
7083                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7084                         or die_error(404, "Base object does not exist");
7085
7086                 # here errors should not hapen
7087                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7088                         or die_error(500, "Open git-ls-tree failed");
7089                 my $line = <$fd>;
7090                 close $fd;
7091
7092                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7093                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7094                         die_error(404, "File or directory for given base does not exist");
7095                 }
7096                 $type = $2;
7097                 $hash = $3;
7098         } else {
7099                 die_error(400, "Not enough information to find object");
7100         }
7101
7102         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7103                                           hash=>$hash, hash_base=>$hash_base,
7104                                           file_name=>$file_name),
7105                              -status => '302 Found');
7106 }
7107
7108 sub git_blobdiff {
7109         my $format = shift || 'html';
7110         my $diff_style = $input_params{'diff_style'} || 'inline';
7111
7112         my $fd;
7113         my @difftree;
7114         my %diffinfo;
7115         my $expires;
7116
7117         # preparing $fd and %diffinfo for git_patchset_body
7118         # new style URI
7119         if (defined $hash_base && defined $hash_parent_base) {
7120                 if (defined $file_name) {
7121                         # read raw output
7122                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7123                                 $hash_parent_base, $hash_base,
7124                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7125                                 or die_error(500, "Open git-diff-tree failed");
7126                         @difftree = map { chomp; $_ } <$fd>;
7127                         close $fd
7128                                 or die_error(404, "Reading git-diff-tree failed");
7129                         @difftree
7130                                 or die_error(404, "Blob diff not found");
7131
7132                 } elsif (defined $hash &&
7133                          $hash =~ /[0-9a-fA-F]{40}/) {
7134                         # try to find filename from $hash
7135
7136                         # read filtered raw output
7137                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7138                                 $hash_parent_base, $hash_base, "--"
7139                                 or die_error(500, "Open git-diff-tree failed");
7140                         @difftree =
7141                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7142                                 # $hash == to_id
7143                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7144                                 map { chomp; $_ } <$fd>;
7145                         close $fd
7146                                 or die_error(404, "Reading git-diff-tree failed");
7147                         @difftree
7148                                 or die_error(404, "Blob diff not found");
7149
7150                 } else {
7151                         die_error(400, "Missing one of the blob diff parameters");
7152                 }
7153
7154                 if (@difftree > 1) {
7155                         die_error(400, "Ambiguous blob diff specification");
7156                 }
7157
7158                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7159                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7160                 $file_name   ||= $diffinfo{'to_file'};
7161
7162                 $hash_parent ||= $diffinfo{'from_id'};
7163                 $hash        ||= $diffinfo{'to_id'};
7164
7165                 # non-textual hash id's can be cached
7166                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7167                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7168                         $expires = '+1d';
7169                 }
7170
7171                 # open patch output
7172                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7173                         '-p', ($format eq 'html' ? "--full-index" : ()),
7174                         $hash_parent_base, $hash_base,
7175                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7176                         or die_error(500, "Open git-diff-tree failed");
7177         }
7178
7179         # old/legacy style URI -- not generated anymore since 1.4.3.
7180         if (!%diffinfo) {
7181                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7182         }
7183
7184         # header
7185         if ($format eq 'html') {
7186                 my $formats_nav =
7187                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7188                                 "raw");
7189                 $formats_nav .= diff_style_nav($diff_style);
7190                 git_header_html(undef, $expires);
7191                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7192                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7193                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7194                 } else {
7195                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7196                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7197                 }
7198                 if (defined $file_name) {
7199                         git_print_page_path($file_name, "blob", $hash_base);
7200                 } else {
7201                         print "<div class=\"page_path\"></div>\n";
7202                 }
7203
7204         } elsif ($format eq 'plain') {
7205                 print $cgi->header(
7206                         -type => 'text/plain',
7207                         -charset => 'utf-8',
7208                         -expires => $expires,
7209                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7210
7211                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7212
7213         } else {
7214                 die_error(400, "Unknown blobdiff format");
7215         }
7216
7217         # patch
7218         if ($format eq 'html') {
7219                 print "<div class=\"page_body\">\n";
7220
7221                 git_patchset_body($fd, $diff_style,
7222                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7223                 close $fd;
7224
7225                 print "</div>\n"; # class="page_body"
7226                 git_footer_html();
7227
7228         } else {
7229                 while (my $line = <$fd>) {
7230                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7231                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7232
7233                         print $line;
7234
7235                         last if $line =~ m!^\+\+\+!;
7236                 }
7237                 local $/ = undef;
7238                 print <$fd>;
7239                 close $fd;
7240         }
7241 }
7242
7243 sub git_blobdiff_plain {
7244         git_blobdiff('plain');
7245 }
7246
7247 # assumes that it is added as later part of already existing navigation,
7248 # so it returns "| foo | bar" rather than just "foo | bar"
7249 sub diff_style_nav {
7250         my ($diff_style, $is_combined) = @_;
7251         $diff_style ||= 'inline';
7252
7253         return "" if ($is_combined);
7254
7255         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7256         my %styles = @styles;
7257         @styles =
7258                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7259
7260         return join '',
7261                 map { " | ".$_ }
7262                 map {
7263                         $_ eq $diff_style ? $styles{$_} :
7264                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7265                 } @styles;
7266 }
7267
7268 sub git_commitdiff {
7269         my %params = @_;
7270         my $format = $params{-format} || 'html';
7271         my $diff_style = $input_params{'diff_style'} || 'inline';
7272
7273         my ($patch_max) = gitweb_get_feature('patches');
7274         if ($format eq 'patch') {
7275                 die_error(403, "Patch view not allowed") unless $patch_max;
7276         }
7277
7278         $hash ||= $hash_base || "HEAD";
7279         my %co = parse_commit($hash)
7280             or die_error(404, "Unknown commit object");
7281
7282         # choose format for commitdiff for merge
7283         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7284                 $hash_parent = '--cc';
7285         }
7286         # we need to prepare $formats_nav before almost any parameter munging
7287         my $formats_nav;
7288         if ($format eq 'html') {
7289                 $formats_nav =
7290                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7291                                 "raw");
7292                 if ($patch_max && @{$co{'parents'}} <= 1) {
7293                         $formats_nav .= " | " .
7294                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7295                                         "patch");
7296                 }
7297                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7298
7299                 if (defined $hash_parent &&
7300                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7301                         # commitdiff with two commits given
7302                         my $hash_parent_short = $hash_parent;
7303                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7304                                 $hash_parent_short = substr($hash_parent, 0, 7);
7305                         }
7306                         $formats_nav .=
7307                                 ' (from';
7308                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7309                                 if ($co{'parents'}[$i] eq $hash_parent) {
7310                                         $formats_nav .= ' parent ' . ($i+1);
7311                                         last;
7312                                 }
7313                         }
7314                         $formats_nav .= ': ' .
7315                                 $cgi->a({-href => href(-replay=>1,
7316                                                        hash=>$hash_parent, hash_base=>undef)},
7317                                         esc_html($hash_parent_short)) .
7318                                 ')';
7319                 } elsif (!$co{'parent'}) {
7320                         # --root commitdiff
7321                         $formats_nav .= ' (initial)';
7322                 } elsif (scalar @{$co{'parents'}} == 1) {
7323                         # single parent commit
7324                         $formats_nav .=
7325                                 ' (parent: ' .
7326                                 $cgi->a({-href => href(-replay=>1,
7327                                                        hash=>$co{'parent'}, hash_base=>undef)},
7328                                         esc_html(substr($co{'parent'}, 0, 7))) .
7329                                 ')';
7330                 } else {
7331                         # merge commit
7332                         if ($hash_parent eq '--cc') {
7333                                 $formats_nav .= ' | ' .
7334                                         $cgi->a({-href => href(-replay=>1,
7335                                                                hash=>$hash, hash_parent=>'-c')},
7336                                                 'combined');
7337                         } else { # $hash_parent eq '-c'
7338                                 $formats_nav .= ' | ' .
7339                                         $cgi->a({-href => href(-replay=>1,
7340                                                                hash=>$hash, hash_parent=>'--cc')},
7341                                                 'compact');
7342                         }
7343                         $formats_nav .=
7344                                 ' (merge: ' .
7345                                 join(' ', map {
7346                                         $cgi->a({-href => href(-replay=>1,
7347                                                                hash=>$_, hash_base=>undef)},
7348                                                 esc_html(substr($_, 0, 7)));
7349                                 } @{$co{'parents'}} ) .
7350                                 ')';
7351                 }
7352         }
7353
7354         my $hash_parent_param = $hash_parent;
7355         if (!defined $hash_parent_param) {
7356                 # --cc for multiple parents, --root for parentless
7357                 $hash_parent_param =
7358                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7359         }
7360
7361         # read commitdiff
7362         my $fd;
7363         my @difftree;
7364         if ($format eq 'html') {
7365                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7366                         "--no-commit-id", "--patch-with-raw", "--full-index",
7367                         $hash_parent_param, $hash, "--"
7368                         or die_error(500, "Open git-diff-tree failed");
7369
7370                 while (my $line = <$fd>) {
7371                         chomp $line;
7372                         # empty line ends raw part of diff-tree output
7373                         last unless $line;
7374                         push @difftree, scalar parse_difftree_raw_line($line);
7375                 }
7376
7377         } elsif ($format eq 'plain') {
7378                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7379                         '-p', $hash_parent_param, $hash, "--"
7380                         or die_error(500, "Open git-diff-tree failed");
7381         } elsif ($format eq 'patch') {
7382                 # For commit ranges, we limit the output to the number of
7383                 # patches specified in the 'patches' feature.
7384                 # For single commits, we limit the output to a single patch,
7385                 # diverging from the git-format-patch default.
7386                 my @commit_spec = ();
7387                 if ($hash_parent) {
7388                         if ($patch_max > 0) {
7389                                 push @commit_spec, "-$patch_max";
7390                         }
7391                         push @commit_spec, '-n', "$hash_parent..$hash";
7392                 } else {
7393                         if ($params{-single}) {
7394                                 push @commit_spec, '-1';
7395                         } else {
7396                                 if ($patch_max > 0) {
7397                                         push @commit_spec, "-$patch_max";
7398                                 }
7399                                 push @commit_spec, "-n";
7400                         }
7401                         push @commit_spec, '--root', $hash;
7402                 }
7403                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7404                         '--encoding=utf8', '--stdout', @commit_spec
7405                         or die_error(500, "Open git-format-patch failed");
7406         } else {
7407                 die_error(400, "Unknown commitdiff format");
7408         }
7409
7410         # non-textual hash id's can be cached
7411         my $expires;
7412         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7413                 $expires = "+1d";
7414         }
7415
7416         # write commit message
7417         if ($format eq 'html') {
7418                 my $refs = git_get_references();
7419                 my $ref = format_ref_marker($refs, $co{'id'});
7420
7421                 git_header_html(undef, $expires);
7422                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7423                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7424                 print "<div class=\"title_text\">\n" .
7425                       "<table class=\"object_header\">\n";
7426                 git_print_authorship_rows(\%co);
7427                 print "</table>".
7428                       "</div>\n";
7429                 print "<div class=\"page_body\">\n";
7430                 if (@{$co{'comment'}} > 1) {
7431                         print "<div class=\"log\">\n";
7432                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7433                         print "</div>\n"; # class="log"
7434                 }
7435
7436         } elsif ($format eq 'plain') {
7437                 my $refs = git_get_references("tags");
7438                 my $tagname = git_get_rev_name_tags($hash);
7439                 my $filename = basename($project) . "-$hash.patch";
7440
7441                 print $cgi->header(
7442                         -type => 'text/plain',
7443                         -charset => 'utf-8',
7444                         -expires => $expires,
7445                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7446                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7447                 print "From: " . to_utf8($co{'author'}) . "\n";
7448                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7449                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7450
7451                 print "X-Git-Tag: $tagname\n" if $tagname;
7452                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7453
7454                 foreach my $line (@{$co{'comment'}}) {
7455                         print to_utf8($line) . "\n";
7456                 }
7457                 print "---\n\n";
7458         } elsif ($format eq 'patch') {
7459                 my $filename = basename($project) . "-$hash.patch";
7460
7461                 print $cgi->header(
7462                         -type => 'text/plain',
7463                         -charset => 'utf-8',
7464                         -expires => $expires,
7465                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7466         }
7467
7468         # write patch
7469         if ($format eq 'html') {
7470                 my $use_parents = !defined $hash_parent ||
7471                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7472                 git_difftree_body(\@difftree, $hash,
7473                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7474                 print "<br/>\n";
7475
7476                 git_patchset_body($fd, $diff_style,
7477                                   \@difftree, $hash,
7478                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7479                 close $fd;
7480                 print "</div>\n"; # class="page_body"
7481                 git_footer_html();
7482
7483         } elsif ($format eq 'plain') {
7484                 local $/ = undef;
7485                 print <$fd>;
7486                 close $fd
7487                         or print "Reading git-diff-tree failed\n";
7488         } elsif ($format eq 'patch') {
7489                 local $/ = undef;
7490                 print <$fd>;
7491                 close $fd
7492                         or print "Reading git-format-patch failed\n";
7493         }
7494 }
7495
7496 sub git_commitdiff_plain {
7497         git_commitdiff(-format => 'plain');
7498 }
7499
7500 # format-patch-style patches
7501 sub git_patch {
7502         git_commitdiff(-format => 'patch', -single => 1);
7503 }
7504
7505 sub git_patches {
7506         git_commitdiff(-format => 'patch');
7507 }
7508
7509 sub git_history {
7510         git_log_generic('history', \&git_history_body,
7511                         $hash_base, $hash_parent_base,
7512                         $file_name, $hash);
7513 }
7514
7515 sub git_search {
7516         $searchtype ||= 'commit';
7517
7518         # check if appropriate features are enabled
7519         gitweb_check_feature('search')
7520                 or die_error(403, "Search is disabled");
7521         if ($searchtype eq 'pickaxe') {
7522                 # pickaxe may take all resources of your box and run for several minutes
7523                 # with every query - so decide by yourself how public you make this feature
7524                 gitweb_check_feature('pickaxe')
7525                         or die_error(403, "Pickaxe search is disabled");
7526         }
7527         if ($searchtype eq 'grep') {
7528                 # grep search might be potentially CPU-intensive, too
7529                 gitweb_check_feature('grep')
7530                         or die_error(403, "Grep search is disabled");
7531         }
7532
7533         if (!defined $searchtext) {
7534                 die_error(400, "Text field is empty");
7535         }
7536         if (!defined $hash) {
7537                 $hash = git_get_head_hash($project);
7538         }
7539         my %co = parse_commit($hash);
7540         if (!%co) {
7541                 die_error(404, "Unknown commit object");
7542         }
7543         if (!defined $page) {
7544                 $page = 0;
7545         }
7546
7547         if ($searchtype eq 'commit' ||
7548             $searchtype eq 'author' ||
7549             $searchtype eq 'committer') {
7550                 git_search_message(%co);
7551         } elsif ($searchtype eq 'pickaxe') {
7552                 git_search_changes(%co);
7553         } elsif ($searchtype eq 'grep') {
7554                 git_search_files(%co);
7555         } else {
7556                 die_error(400, "Unknown search type");
7557         }
7558 }
7559
7560 sub git_search_help {
7561         git_header_html();
7562         git_print_page_nav('','', $hash,$hash,$hash);
7563         print <<EOT;
7564 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7565 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7566 the pattern entered is recognized as the POSIX extended
7567 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7568 insensitive).</p>
7569 <dl>
7570 <dt><b>commit</b></dt>
7571 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7572 EOT
7573         my $have_grep = gitweb_check_feature('grep');
7574         if ($have_grep) {
7575                 print <<EOT;
7576 <dt><b>grep</b></dt>
7577 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7578     a different one) are searched for the given pattern. On large trees, this search can take
7579 a while and put some strain on the server, so please use it with some consideration. Note that
7580 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7581 case-sensitive.</dd>
7582 EOT
7583         }
7584         print <<EOT;
7585 <dt><b>author</b></dt>
7586 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7587 <dt><b>committer</b></dt>
7588 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7589 EOT
7590         my $have_pickaxe = gitweb_check_feature('pickaxe');
7591         if ($have_pickaxe) {
7592                 print <<EOT;
7593 <dt><b>pickaxe</b></dt>
7594 <dd>All commits that caused the string to appear or disappear from any file (changes that
7595 added, removed or "modified" the string) will be listed. This search can take a while and
7596 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7597 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7598 EOT
7599         }
7600         print "</dl>\n";
7601         git_footer_html();
7602 }
7603
7604 sub git_shortlog {
7605         git_log_generic('shortlog', \&git_shortlog_body,
7606                         $hash, $hash_parent);
7607 }
7608
7609 ## ......................................................................
7610 ## feeds (RSS, Atom; OPML)
7611
7612 sub git_feed {
7613         my $format = shift || 'atom';
7614         my $have_blame = gitweb_check_feature('blame');
7615
7616         # Atom: http://www.atomenabled.org/developers/syndication/
7617         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7618         if ($format ne 'rss' && $format ne 'atom') {
7619                 die_error(400, "Unknown web feed format");
7620         }
7621
7622         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7623         my $head = $hash || 'HEAD';
7624         my @commitlist = parse_commits($head, 150, 0, $file_name);
7625
7626         my %latest_commit;
7627         my %latest_date;
7628         my $content_type = "application/$format+xml";
7629         if (defined $cgi->http('HTTP_ACCEPT') &&
7630                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7631                 # browser (feed reader) prefers text/xml
7632                 $content_type = 'text/xml';
7633         }
7634         if (defined($commitlist[0])) {
7635                 %latest_commit = %{$commitlist[0]};
7636                 my $latest_epoch = $latest_commit{'committer_epoch'};
7637                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7638                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7639                 if (defined $if_modified) {
7640                         my $since;
7641                         if (eval { require HTTP::Date; 1; }) {
7642                                 $since = HTTP::Date::str2time($if_modified);
7643                         } elsif (eval { require Time::ParseDate; 1; }) {
7644                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7645                         }
7646                         if (defined $since && $latest_epoch <= $since) {
7647                                 print $cgi->header(
7648                                         -type => $content_type,
7649                                         -charset => 'utf-8',
7650                                         -last_modified => $latest_date{'rfc2822'},
7651                                         -status => '304 Not Modified');
7652                                 return;
7653                         }
7654                 }
7655                 print $cgi->header(
7656                         -type => $content_type,
7657                         -charset => 'utf-8',
7658                         -last_modified => $latest_date{'rfc2822'});
7659         } else {
7660                 print $cgi->header(
7661                         -type => $content_type,
7662                         -charset => 'utf-8');
7663         }
7664
7665         # Optimization: skip generating the body if client asks only
7666         # for Last-Modified date.
7667         return if ($cgi->request_method() eq 'HEAD');
7668
7669         # header variables
7670         my $title = "$site_name - $project/$action";
7671         my $feed_type = 'log';
7672         if (defined $hash) {
7673                 $title .= " - '$hash'";
7674                 $feed_type = 'branch log';
7675                 if (defined $file_name) {
7676                         $title .= " :: $file_name";
7677                         $feed_type = 'history';
7678                 }
7679         } elsif (defined $file_name) {
7680                 $title .= " - $file_name";
7681                 $feed_type = 'history';
7682         }
7683         $title .= " $feed_type";
7684         my $descr = git_get_project_description($project);
7685         if (defined $descr) {
7686                 $descr = esc_html($descr);
7687         } else {
7688                 $descr = "$project " .
7689                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7690                          " feed";
7691         }
7692         my $owner = git_get_project_owner($project);
7693         $owner = esc_html($owner);
7694
7695         #header
7696         my $alt_url;
7697         if (defined $file_name) {
7698                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7699         } elsif (defined $hash) {
7700                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7701         } else {
7702                 $alt_url = href(-full=>1, action=>"summary");
7703         }
7704         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7705         if ($format eq 'rss') {
7706                 print <<XML;
7707 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7708 <channel>
7709 XML
7710                 print "<title>$title</title>\n" .
7711                       "<link>$alt_url</link>\n" .
7712                       "<description>$descr</description>\n" .
7713                       "<language>en</language>\n" .
7714                       # project owner is responsible for 'editorial' content
7715                       "<managingEditor>$owner</managingEditor>\n";
7716                 if (defined $logo || defined $favicon) {
7717                         # prefer the logo to the favicon, since RSS
7718                         # doesn't allow both
7719                         my $img = esc_url($logo || $favicon);
7720                         print "<image>\n" .
7721                               "<url>$img</url>\n" .
7722                               "<title>$title</title>\n" .
7723                               "<link>$alt_url</link>\n" .
7724                               "</image>\n";
7725                 }
7726                 if (%latest_date) {
7727                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7728                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7729                 }
7730                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7731         } elsif ($format eq 'atom') {
7732                 print <<XML;
7733 <feed xmlns="http://www.w3.org/2005/Atom">
7734 XML
7735                 print "<title>$title</title>\n" .
7736                       "<subtitle>$descr</subtitle>\n" .
7737                       '<link rel="alternate" type="text/html" href="' .
7738                       $alt_url . '" />' . "\n" .
7739                       '<link rel="self" type="' . $content_type . '" href="' .
7740                       $cgi->self_url() . '" />' . "\n" .
7741                       "<id>" . href(-full=>1) . "</id>\n" .
7742                       # use project owner for feed author
7743                       "<author><name>$owner</name></author>\n";
7744                 if (defined $favicon) {
7745                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7746                 }
7747                 if (defined $logo) {
7748                         # not twice as wide as tall: 72 x 27 pixels
7749                         print "<logo>" . esc_url($logo) . "</logo>\n";
7750                 }
7751                 if (! %latest_date) {
7752                         # dummy date to keep the feed valid until commits trickle in:
7753                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7754                 } else {
7755                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7756                 }
7757                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7758         }
7759
7760         # contents
7761         for (my $i = 0; $i <= $#commitlist; $i++) {
7762                 my %co = %{$commitlist[$i]};
7763                 my $commit = $co{'id'};
7764                 # we read 150, we always show 30 and the ones more recent than 48 hours
7765                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7766                         last;
7767                 }
7768                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7769
7770                 # get list of changed files
7771                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7772                         $co{'parent'} || "--root",
7773                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7774                         or next;
7775                 my @difftree = map { chomp; $_ } <$fd>;
7776                 close $fd
7777                         or next;
7778
7779                 # print element (entry, item)
7780                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7781                 if ($format eq 'rss') {
7782                         print "<item>\n" .
7783                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7784                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7785                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7786                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7787                               "<link>$co_url</link>\n" .
7788                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7789                               "<content:encoded>" .
7790                               "<![CDATA[\n";
7791                 } elsif ($format eq 'atom') {
7792                         print "<entry>\n" .
7793                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7794                               "<updated>$cd{'iso-8601'}</updated>\n" .
7795                               "<author>\n" .
7796                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7797                         if ($co{'author_email'}) {
7798                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7799                         }
7800                         print "</author>\n" .
7801                               # use committer for contributor
7802                               "<contributor>\n" .
7803                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7804                         if ($co{'committer_email'}) {
7805                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7806                         }
7807                         print "</contributor>\n" .
7808                               "<published>$cd{'iso-8601'}</published>\n" .
7809                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7810                               "<id>$co_url</id>\n" .
7811                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7812                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7813                 }
7814                 my $comment = $co{'comment'};
7815                 print "<pre>\n";
7816                 foreach my $line (@$comment) {
7817                         $line = esc_html($line);
7818                         print "$line\n";
7819                 }
7820                 print "</pre><ul>\n";
7821                 foreach my $difftree_line (@difftree) {
7822                         my %difftree = parse_difftree_raw_line($difftree_line);
7823                         next if !$difftree{'from_id'};
7824
7825                         my $file = $difftree{'file'} || $difftree{'to_file'};
7826
7827                         print "<li>" .
7828                               "[" .
7829                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7830                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7831                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7832                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7833                                       -title => "diff"}, 'D');
7834                         if ($have_blame) {
7835                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7836                                                              file_name=>$file, hash_base=>$commit),
7837                                               -title => "blame"}, 'B');
7838                         }
7839                         # if this is not a feed of a file history
7840                         if (!defined $file_name || $file_name ne $file) {
7841                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7842                                                              file_name=>$file, hash=>$commit),
7843                                               -title => "history"}, 'H');
7844                         }
7845                         $file = esc_path($file);
7846                         print "] ".
7847                               "$file</li>\n";
7848                 }
7849                 if ($format eq 'rss') {
7850                         print "</ul>]]>\n" .
7851                               "</content:encoded>\n" .
7852                               "</item>\n";
7853                 } elsif ($format eq 'atom') {
7854                         print "</ul>\n</div>\n" .
7855                               "</content>\n" .
7856                               "</entry>\n";
7857                 }
7858         }
7859
7860         # end of feed
7861         if ($format eq 'rss') {
7862                 print "</channel>\n</rss>\n";
7863         } elsif ($format eq 'atom') {
7864                 print "</feed>\n";
7865         }
7866 }
7867
7868 sub git_rss {
7869         git_feed('rss');
7870 }
7871
7872 sub git_atom {
7873         git_feed('atom');
7874 }
7875
7876 sub git_opml {
7877         my @list = git_get_projects_list();
7878         if (!@list) {
7879                 die_error(404, "No projects found");
7880         }
7881
7882         print $cgi->header(
7883                 -type => 'text/xml',
7884                 -charset => 'utf-8',
7885                 -content_disposition => 'inline; filename="opml.xml"');
7886
7887         my $title = esc_html($site_name);
7888         print <<XML;
7889 <?xml version="1.0" encoding="utf-8"?>
7890 <opml version="1.0">
7891 <head>
7892   <title>$title OPML Export</title>
7893 </head>
7894 <body>
7895 <outline text="git RSS feeds">
7896 XML
7897
7898         foreach my $pr (@list) {
7899                 my %proj = %$pr;
7900                 my $head = git_get_head_hash($proj{'path'});
7901                 if (!defined $head) {
7902                         next;
7903                 }
7904                 $git_dir = "$projectroot/$proj{'path'}";
7905                 my %co = parse_commit($head);
7906                 if (!%co) {
7907                         next;
7908                 }
7909
7910                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7911                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7912                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7913                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7914         }
7915         print <<XML;
7916 </outline>
7917 </body>
7918 </opml>
7919 XML
7920 }