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