gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # group projects by category on the projects list
 121 # (enabled if this variable evaluates to true)
 122 our $projects_list_group_categories = 0;
 123
 124 # default category if none specified
 125 # (leave the empty string for no category)
 126 our $project_list_default_category = "";
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip', '-n']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'sh'  } qw(bash zsh ksh),
 267         map { $_ => 'cpp' } qw(cxx c++ cc),
 268         map { $_ => 'php' } qw(php3 php4 php5 phps),
 269         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270         map { $_ => 'make'} qw(mak mk),
 271         map { $_ => 'xml' } qw(xhtml html htm),
 272 );
 273
 274 # You define site-wide feature defaults here; override them with
 275 # $GITWEB_CONFIG as necessary.
 276 our %feature = (
 277         # feature => {
 278         #       'sub' => feature-sub (subroutine),
 279         #       'override' => allow-override (boolean),
 280         #       'default' => [ default options...] (array reference)}
 281         #
 282         # if feature is overridable (it means that allow-override has true value),
 283         # then feature-sub will be called with default options as parameters;
 284         # return value of feature-sub indicates if to enable specified feature
 285         #
 286         # if there is no 'sub' key (no feature-sub), then feature cannot be
 287         # overridden
 288         #
 289         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291         # is enabled
 292
 293         # Enable the 'blame' blob view, showing the last commit that modified
 294         # each line in the file. This can be very CPU-intensive.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'blame'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'blame'}{'override'} = 1;
 300         # and in project config gitweb.blame = 0|1;
 301         'blame' => {
 302                 'sub' => sub { feature_bool('blame', @_) },
 303                 'override' => 0,
 304                 'default' => [0]},
 305
 306         # Enable the 'snapshot' link, providing a compressed archive of any
 307         # tree. This can potentially generate high traffic if you have large
 308         # project.
 309
 310         # Value is a list of formats defined in %known_snapshot_formats that
 311         # you wish to offer.
 312         # To disable system wide have in $GITWEB_CONFIG
 313         # $feature{'snapshot'}{'default'} = [];
 314         # To have project specific config enable override in $GITWEB_CONFIG
 315         # $feature{'snapshot'}{'override'} = 1;
 316         # and in project config, a comma-separated list of formats or "none"
 317         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318         'snapshot' => {
 319                 'sub' => \&feature_snapshot,
 320                 'override' => 0,
 321                 'default' => ['tgz']},
 322
 323         # Enable text search, which will list the commits which match author,
 324         # committer or commit text to a given string.  Enabled by default.
 325         # Project specific override is not supported.
 326         #
 327         # Note that this controls all search features, which means that if
 328         # it is disabled, then 'grep' and 'pickaxe' search would also be
 329         # disabled.
 330         'search' => {
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable grep search, which will list the files in currently selected
 335         # tree containing the given string. Enabled by default. This can be
 336         # potentially CPU-intensive, of course.
 337         # Note that you need to have 'search' feature enabled too.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'grep'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'grep'}{'override'} = 1;
 343         # and in project config gitweb.grep = 0|1;
 344         'grep' => {
 345                 'sub' => sub { feature_bool('grep', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable the pickaxe search, which will list the commits that modified
 350         # a given string in a file. This can be practical and quite faster
 351         # alternative to 'blame', but still potentially CPU-intensive.
 352         # Note that you need to have 'search' feature enabled too.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'pickaxe'}{'default'} = [1];
 356         # To have project specific config enable override in $GITWEB_CONFIG
 357         # $feature{'pickaxe'}{'override'} = 1;
 358         # and in project config gitweb.pickaxe = 0|1;
 359         'pickaxe' => {
 360                 'sub' => sub { feature_bool('pickaxe', @_) },
 361                 'override' => 0,
 362                 'default' => [1]},
 363
 364         # Enable showing size of blobs in a 'tree' view, in a separate
 365         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367         # To disable system wide have in $GITWEB_CONFIG
 368         # $feature{'show-sizes'}{'default'} = [0];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'show-sizes'}{'override'} = 1;
 371         # and in project config gitweb.showsizes = 0|1;
 372         'show-sizes' => {
 373                 'sub' => sub { feature_bool('showsizes', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Make gitweb use an alternative format of the URLs which can be
 378         # more readable and natural-looking: project name is embedded
 379         # directly in the path and the query string contains other
 380         # auxiliary information. All gitweb installations recognize
 381         # URL in either format; this configures in which formats gitweb
 382         # generates links.
 383
 384         # To enable system wide have in $GITWEB_CONFIG
 385         # $feature{'pathinfo'}{'default'} = [1];
 386         # Project specific override is not supported.
 387
 388         # Note that you will need to change the default location of CSS,
 389         # favicon, logo and possibly other files to an absolute URL. Also,
 390         # if gitweb.cgi serves as your indexfile, you will need to force
 391         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392         'pathinfo' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Make gitweb consider projects in project root subdirectories
 397         # to be forks of existing projects. Given project $projname.git,
 398         # projects matching $projname/*.git will not be shown in the main
 399         # projects list, instead a '+' mark will be added to $projname
 400         # there and a 'forks' view will be enabled for the project, listing
 401         # all the forks. If project list is taken from a file, forks have
 402         # to be listed after the main project.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'forks'}{'default'} = [1];
 406         # Project specific override is not supported.
 407         'forks' => {
 408                 'override' => 0,
 409                 'default' => [0]},
 410
 411         # Insert custom links to the action bar of all project pages.
 412         # This enables you mainly to link to third-party scripts integrating
 413         # into gitweb; e.g. git-browser for graphical history representation
 414         # or custom web-based repository administration interface.
 415
 416         # The 'default' value consists of a list of triplets in the form
 417         # (label, link, position) where position is the label after which
 418         # to insert the link and link is a format string where %n expands
 419         # to the project name, %f to the project path within the filesystem,
 420         # %h to the current hash (h gitweb parameter) and %b to the current
 421         # hash base (hb gitweb parameter); %% expands to %.
 422
 423         # To enable system wide have in $GITWEB_CONFIG e.g.
 424         # $feature{'actions'}{'default'} = [('graphiclog',
 425         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426         # Project specific override is not supported.
 427         'actions' => {
 428                 'override' => 0,
 429                 'default' => []},
 430
 431         # Allow gitweb scan project content tags of project repository,
 432         # and display the popular Web 2.0-ish "tag cloud" near the projects
 433         # list.  Note that this is something COMPLETELY different from the
 434         # normal Git tags.
 435
 436         # gitweb by itself can show existing tags, but it does not handle
 437         # tagging itself; you need to do it externally, outside gitweb.
 438         # The format is described in git_get_project_ctags() subroutine.
 439         # You may want to install the HTML::TagCloud Perl module to get
 440         # a pretty tag cloud instead of just a list of tags.
 441
 442         # To enable system wide have in $GITWEB_CONFIG
 443         # $feature{'ctags'}{'default'} = [1];
 444         # Project specific override is not supported.
 445
 446         # In the future whether ctags editing is enabled might depend
 447         # on the value, but using 1 should always mean no editing of ctags.
 448         'ctags' => {
 449                 'override' => 0,
 450                 'default' => [0]},
 451
 452         # The maximum number of patches in a patchset generated in patch
 453         # view. Set this to 0 or undef to disable patch view, or to a
 454         # negative number to remove any limit.
 455
 456         # To disable system wide have in $GITWEB_CONFIG
 457         # $feature{'patches'}{'default'} = [0];
 458         # To have project specific config enable override in $GITWEB_CONFIG
 459         # $feature{'patches'}{'override'} = 1;
 460         # and in project config gitweb.patches = 0|n;
 461         # where n is the maximum number of patches allowed in a patchset.
 462         'patches' => {
 463                 'sub' => \&feature_patches,
 464                 'override' => 0,
 465                 'default' => [16]},
 466
 467         # Avatar support. When this feature is enabled, views such as
 468         # shortlog or commit will display an avatar associated with
 469         # the email of the committer(s) and/or author(s).
 470
 471         # Currently available providers are gravatar and picon.
 472         # If an unknown provider is specified, the feature is disabled.
 473
 474         # Gravatar depends on Digest::MD5.
 475         # Picon currently relies on the indiana.edu database.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'avatar'}{'default'} = ['<provider>'];
 479         # where <provider> is either gravatar or picon.
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'avatar'}{'override'} = 1;
 482         # and in project config gitweb.avatar = <provider>;
 483         'avatar' => {
 484                 'sub' => \&feature_avatar,
 485                 'override' => 0,
 486                 'default' => ['']},
 487
 488         # Enable displaying how much time and how many git commands
 489         # it took to generate and display page.  Disabled by default.
 490         # Project specific override is not supported.
 491         'timed' => {
 492                 'override' => 0,
 493                 'default' => [0]},
 494
 495         # Enable turning some links into links to actions which require
 496         # JavaScript to run (like 'blame_incremental').  Not enabled by
 497         # default.  Project specific override is currently not supported.
 498         'javascript-actions' => {
 499                 'override' => 0,
 500                 'default' => [0]},
 501
 502         # Enable and configure ability to change common timezone for dates
 503         # in gitweb output via JavaScript.  Enabled by default.
 504         # Project specific override is not supported.
 505         'javascript-timezone' => {
 506                 'override' => 0,
 507                 'default' => [
 508                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                      # or undef to turn off this feature
 510                         'gitweb_tz', # name of cookie where to store selected timezone
 511                         'datetime',  # CSS class used to mark up dates for manipulation
 512                 ]},
 513
 514         # Syntax highlighting support. This is based on Daniel Svensson's
 515         # and Sham Chukoury's work in gitweb-xmms2.git.
 516         # It requires the 'highlight' program present in $PATH,
 517         # and therefore is disabled by default.
 518
 519         # To enable system wide have in $GITWEB_CONFIG
 520         # $feature{'highlight'}{'default'} = [1];
 521
 522         'highlight' => {
 523                 'sub' => sub { feature_bool('highlight', @_) },
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable displaying of remote heads in the heads list
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'remote_heads'}{'default'} = [1];
 531         # To have project specific config enable override in $GITWEB_CONFIG
 532         # $feature{'remote_heads'}{'override'} = 1;
 533         # and in project config gitweb.remote_heads = 0|1;
 534         'remote_heads' => {
 535                 'sub' => sub { feature_bool('remote_heads', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538 );
 539
 540 sub gitweb_get_feature {
 541         my ($name) = @_;
 542         return unless exists $feature{$name};
 543         my ($sub, $override, @defaults) = (
 544                 $feature{$name}{'sub'},
 545                 $feature{$name}{'override'},
 546                 @{$feature{$name}{'default'}});
 547         # project specific override is possible only if we have project
 548         our $git_dir; # global variable, declared later
 549         if (!$override || !defined $git_dir) {
 550                 return @defaults;
 551         }
 552         if (!defined $sub) {
 553                 warn "feature $name is not overridable";
 554                 return @defaults;
 555         }
 556         return $sub->(@defaults);
 557 }
 558
 559 # A wrapper to check if a given feature is enabled.
 560 # With this, you can say
 561 #
 562 #   my $bool_feat = gitweb_check_feature('bool_feat');
 563 #   gitweb_check_feature('bool_feat') or somecode;
 564 #
 565 # instead of
 566 #
 567 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569 #
 570 sub gitweb_check_feature {
 571         return (gitweb_get_feature(@_))[0];
 572 }
 573
 574
 575 sub feature_bool {
 576         my $key = shift;
 577         my ($val) = git_get_project_config($key, '--bool');
 578
 579         if (!defined $val) {
 580                 return ($_[0]);
 581         } elsif ($val eq 'true') {
 582                 return (1);
 583         } elsif ($val eq 'false') {
 584                 return (0);
 585         }
 586 }
 587
 588 sub feature_snapshot {
 589         my (@fmts) = @_;
 590
 591         my ($val) = git_get_project_config('snapshot');
 592
 593         if ($val) {
 594                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595         }
 596
 597         return @fmts;
 598 }
 599
 600 sub feature_patches {
 601         my @val = (git_get_project_config('patches', '--int'));
 602
 603         if (@val) {
 604                 return @val;
 605         }
 606
 607         return ($_[0]);
 608 }
 609
 610 sub feature_avatar {
 611         my @val = (git_get_project_config('avatar'));
 612
 613         return @val ? @val : @_;
 614 }
 615
 616 # checking HEAD file with -e is fragile if the repository was
 617 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618 # and then pruned.
 619 sub check_head_link {
 620         my ($dir) = @_;
 621         my $headfile = "$dir/HEAD";
 622         return ((-e $headfile) ||
 623                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624 }
 625
 626 sub check_export_ok {
 627         my ($dir) = @_;
 628         return (check_head_link($dir) &&
 629                 (!$export_ok || -e "$dir/$export_ok") &&
 630                 (!$export_auth_hook || $export_auth_hook->($dir)));
 631 }
 632
 633 # process alternate names for backward compatibility
 634 # filter out unsupported (unknown) snapshot formats
 635 sub filter_snapshot_fmts {
 636         my @fmts = @_;
 637
 638         @fmts = map {
 639                 exists $known_snapshot_format_aliases{$_} ?
 640                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 641         @fmts = grep {
 642                 exists $known_snapshot_formats{$_} &&
 643                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644 }
 645
 646 # If it is set to code reference, it is code that it is to be run once per
 647 # request, allowing updating configurations that change with each request,
 648 # while running other code in config file only once.
 649 #
 650 # Otherwise, if it is false then gitweb would process config file only once;
 651 # if it is true then gitweb config would be run for each request.
 652 our $per_request_config = 1;
 653
 654 # read and parse gitweb config file given by its parameter.
 655 # returns true on success, false on recoverable error, allowing
 656 # to chain this subroutine, using first file that exists.
 657 # dies on errors during parsing config file, as it is unrecoverable.
 658 sub read_config_file {
 659         my $filename = shift;
 660         return unless defined $filename;
 661         # die if there are errors parsing config file
 662         if (-e $filename) {
 663                 do $filename;
 664                 die $@ if $@;
 665                 return 1;
 666         }
 667         return;
 668 }
 669
 670 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671 sub evaluate_gitweb_config {
 672         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676         # Protect agains duplications of file names, to not read config twice.
 677         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678         # there possibility of duplication of filename there doesn't matter.
 679         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682         # Common system-wide settings for convenience.
 683         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684         read_config_file($GITWEB_CONFIG_COMMON);
 685
 686         # Use first config file that exists.  This means use the per-instance
 687         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688         read_config_file($GITWEB_CONFIG) and return;
 689         read_config_file($GITWEB_CONFIG_SYSTEM);
 690 }
 691
 692 # Get loadavg of system, to compare against $maxload.
 693 # Currently it requires '/proc/loadavg' present to get loadavg;
 694 # if it is not present it returns 0, which means no load checking.
 695 sub get_loadavg {
 696         if( -e '/proc/loadavg' ){
 697                 open my $fd, '<', '/proc/loadavg'
 698                         or return 0;
 699                 my @load = split(/\s+/, scalar <$fd>);
 700                 close $fd;
 701
 702                 # The first three columns measure CPU and IO utilization of the last one,
 703                 # five, and 10 minute periods.  The fourth column shows the number of
 704                 # currently running processes and the total number of processes in the m/n
 705                 # format.  The last column displays the last process ID used.
 706                 return $load[0] || 0;
 707         }
 708         # additional checks for load average should go here for things that don't export
 709         # /proc/loadavg
 710
 711         return 0;
 712 }
 713
 714 # version of the core git binary
 715 our $git_version;
 716 sub evaluate_git_version {
 717         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718         $number_of_git_cmds++;
 719 }
 720
 721 sub check_loadavg {
 722         if (defined $maxload && get_loadavg() > $maxload) {
 723                 die_error(503, "The load average on the server is too high");
 724         }
 725 }
 726
 727 # ======================================================================
 728 # input validation and dispatch
 729
 730 # input parameters can be collected from a variety of sources (presently, CGI
 731 # and PATH_INFO), so we define an %input_params hash that collects them all
 732 # together during validation: this allows subsequent uses (e.g. href()) to be
 733 # agnostic of the parameter origin
 734
 735 our %input_params = ();
 736
 737 # input parameters are stored with the long parameter name as key. This will
 738 # also be used in the href subroutine to convert parameters to their CGI
 739 # equivalent, and since the href() usage is the most frequent one, we store
 740 # the name -> CGI key mapping here, instead of the reverse.
 741 #
 742 # XXX: Warning: If you touch this, check the search form for updating,
 743 # too.
 744
 745 our @cgi_param_mapping = (
 746         project => "p",
 747         action => "a",
 748         file_name => "f",
 749         file_parent => "fp",
 750         hash => "h",
 751         hash_parent => "hp",
 752         hash_base => "hb",
 753         hash_parent_base => "hpb",
 754         page => "pg",
 755         order => "o",
 756         searchtext => "s",
 757         searchtype => "st",
 758         snapshot_format => "sf",
 759         extra_options => "opt",
 760         search_use_regexp => "sr",
 761         ctag => "by_tag",
 762         diff_style => "ds",
 763         project_filter => "pf",
 764         # this must be last entry (for manipulation from JavaScript)
 765         javascript => "js"
 766 );
 767 our %cgi_param_mapping = @cgi_param_mapping;
 768
 769 # we will also need to know the possible actions, for validation
 770 our %actions = (
 771         "blame" => \&git_blame,
 772         "blame_incremental" => \&git_blame_incremental,
 773         "blame_data" => \&git_blame_data,
 774         "blobdiff" => \&git_blobdiff,
 775         "blobdiff_plain" => \&git_blobdiff_plain,
 776         "blob" => \&git_blob,
 777         "blob_plain" => \&git_blob_plain,
 778         "commitdiff" => \&git_commitdiff,
 779         "commitdiff_plain" => \&git_commitdiff_plain,
 780         "commit" => \&git_commit,
 781         "forks" => \&git_forks,
 782         "heads" => \&git_heads,
 783         "history" => \&git_history,
 784         "log" => \&git_log,
 785         "patch" => \&git_patch,
 786         "patches" => \&git_patches,
 787         "remotes" => \&git_remotes,
 788         "rss" => \&git_rss,
 789         "atom" => \&git_atom,
 790         "search" => \&git_search,
 791         "search_help" => \&git_search_help,
 792         "shortlog" => \&git_shortlog,
 793         "summary" => \&git_summary,
 794         "tag" => \&git_tag,
 795         "tags" => \&git_tags,
 796         "tree" => \&git_tree,
 797         "snapshot" => \&git_snapshot,
 798         "object" => \&git_object,
 799         # those below don't need $project
 800         "opml" => \&git_opml,
 801         "project_list" => \&git_project_list,
 802         "project_index" => \&git_project_index,
 803 );
 804
 805 # finally, we have the hash of allowed extra_options for the commands that
 806 # allow them
 807 our %allowed_options = (
 808         "--no-merges" => [ qw(rss atom log shortlog history) ],
 809 );
 810
 811 # fill %input_params with the CGI parameters. All values except for 'opt'
 812 # should be single values, but opt can be an array. We should probably
 813 # build an array of parameters that can be multi-valued, but since for the time
 814 # being it's only this one, we just single it out
 815 sub evaluate_query_params {
 816         our $cgi;
 817
 818         while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                 if ($symbol eq 'opt') {
 820                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 821                 } else {
 822                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 823                 }
 824         }
 825 }
 826
 827 # now read PATH_INFO and update the parameter list for missing parameters
 828 sub evaluate_path_info {
 829         return if defined $input_params{'project'};
 830         return if !$path_info;
 831         $path_info =~ s,^/+,,;
 832         return if !$path_info;
 833
 834         # find which part of PATH_INFO is project
 835         my $project = $path_info;
 836         $project =~ s,/+$,,;
 837         while ($project && !check_head_link("$projectroot/$project")) {
 838                 $project =~ s,/*[^/]*$,,;
 839         }
 840         return unless $project;
 841         $input_params{'project'} = $project;
 842
 843         # do not change any parameters if an action is given using the query string
 844         return if $input_params{'action'};
 845         $path_info =~ s,^\Q$project\E/*,,;
 846
 847         # next, check if we have an action
 848         my $action = $path_info;
 849         $action =~ s,/.*$,,;
 850         if (exists $actions{$action}) {
 851                 $path_info =~ s,^$action/*,,;
 852                 $input_params{'action'} = $action;
 853         }
 854
 855         # list of actions that want hash_base instead of hash, but can have no
 856         # pathname (f) parameter
 857         my @wants_base = (
 858                 'tree',
 859                 'history',
 860         );
 861
 862         # we want to catch, among others
 863         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864         my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867         # first, analyze the 'current' part
 868         if (defined $pathname) {
 869                 # we got "branch:filename" or "branch:dir/"
 870                 # we could use git_get_type(branch:pathname), but:
 871                 # - it needs $git_dir
 872                 # - it does a git() call
 873                 # - the convention of terminating directories with a slash
 874                 #   makes it superfluous
 875                 # - embedding the action in the PATH_INFO would make it even
 876                 #   more superfluous
 877                 $pathname =~ s,^/+,,;
 878                 if (!$pathname || substr($pathname, -1) eq "/") {
 879                         $input_params{'action'} ||= "tree";
 880                         $pathname =~ s,/$,,;
 881                 } else {
 882                         # the default action depends on whether we had parent info
 883                         # or not
 884                         if ($parentrefname) {
 885                                 $input_params{'action'} ||= "blobdiff_plain";
 886                         } else {
 887                                 $input_params{'action'} ||= "blob_plain";
 888                         }
 889                 }
 890                 $input_params{'hash_base'} ||= $refname;
 891                 $input_params{'file_name'} ||= $pathname;
 892         } elsif (defined $refname) {
 893                 # we got "branch". In this case we have to choose if we have to
 894                 # set hash or hash_base.
 895                 #
 896                 # Most of the actions without a pathname only want hash to be
 897                 # set, except for the ones specified in @wants_base that want
 898                 # hash_base instead. It should also be noted that hand-crafted
 899                 # links having 'history' as an action and no pathname or hash
 900                 # set will fail, but that happens regardless of PATH_INFO.
 901                 if (defined $parentrefname) {
 902                         # if there is parent let the default be 'shortlog' action
 903                         # (for http://git.example.com/repo.git/A..B links); if there
 904                         # is no parent, dispatch will detect type of object and set
 905                         # action appropriately if required (if action is not set)
 906                         $input_params{'action'} ||= "shortlog";
 907                 }
 908                 if ($input_params{'action'} &&
 909                     grep { $_ eq $input_params{'action'} } @wants_base) {
 910                         $input_params{'hash_base'} ||= $refname;
 911                 } else {
 912                         $input_params{'hash'} ||= $refname;
 913                 }
 914         }
 915
 916         # next, handle the 'parent' part, if present
 917         if (defined $parentrefname) {
 918                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                 # someproject/blobdiff/oldrev..newrev:/filename
 920                 if ($parentpathname) {
 921                         $parentpathname =~ s,^/+,,;
 922                         $parentpathname =~ s,/$,,;
 923                         $input_params{'file_parent'} ||= $parentpathname;
 924                 } else {
 925                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                 }
 927                 # we assume that hash_parent_base is wanted if a path was specified,
 928                 # or if the action wants hash_base instead of hash
 929                 if (defined $input_params{'file_parent'} ||
 930                         grep { $_ eq $input_params{'action'} } @wants_base) {
 931                         $input_params{'hash_parent_base'} ||= $parentrefname;
 932                 } else {
 933                         $input_params{'hash_parent'} ||= $parentrefname;
 934                 }
 935         }
 936
 937         # for the snapshot action, we allow URLs in the form
 938         # $project/snapshot/$hash.ext
 939         # where .ext determines the snapshot and gets removed from the
 940         # passed $refname to provide the $hash.
 941         #
 942         # To be able to tell that $refname includes the format extension, we
 943         # require the following two conditions to be satisfied:
 944         # - the hash input parameter MUST have been set from the $refname part
 945         #   of the URL (i.e. they must be equal)
 946         # - the snapshot format MUST NOT have been defined already (e.g. from
 947         #   CGI parameter sf)
 948         # It's also useless to try any matching unless $refname has a dot,
 949         # so we check for that too
 950         if (defined $input_params{'action'} &&
 951                 $input_params{'action'} eq 'snapshot' &&
 952                 defined $refname && index($refname, '.') != -1 &&
 953                 $refname eq $input_params{'hash'} &&
 954                 !defined $input_params{'snapshot_format'}) {
 955                 # We loop over the known snapshot formats, checking for
 956                 # extensions. Allowed extensions are both the defined suffix
 957                 # (which includes the initial dot already) and the snapshot
 958                 # format key itself, with a prepended dot
 959                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                         my $hash = $refname;
 961                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                 next;
 963                         }
 964                         my $sfx = $1;
 965                         # a valid suffix was found, so set the snapshot format
 966                         # and reset the hash parameter
 967                         $input_params{'snapshot_format'} = $fmt;
 968                         $input_params{'hash'} = $hash;
 969                         # we also set the format suffix to the one requested
 970                         # in the URL: this way a request for e.g. .tgz returns
 971                         # a .tgz instead of a .tar.gz
 972                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                         last;
 974                 }
 975         }
 976 }
 977
 978 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980      $searchtext, $search_regexp, $project_filter);
 981 sub evaluate_and_validate_params {
 982         our $action = $input_params{'action'};
 983         if (defined $action) {
 984                 if (!validate_action($action)) {
 985                         die_error(400, "Invalid action parameter");
 986                 }
 987         }
 988
 989         # parameters which are pathnames
 990         our $project = $input_params{'project'};
 991         if (defined $project) {
 992                 if (!validate_project($project)) {
 993                         undef $project;
 994                         die_error(404, "No such project");
 995                 }
 996         }
 997
 998         our $project_filter = $input_params{'project_filter'};
 999         if (defined $project_filter) {
1000                 if (!validate_pathname($project_filter)) {
1001                         die_error(404, "Invalid project_filter parameter");
1002                 }
1003         }
1004
1005         our $file_name = $input_params{'file_name'};
1006         if (defined $file_name) {
1007                 if (!validate_pathname($file_name)) {
1008                         die_error(400, "Invalid file parameter");
1009                 }
1010         }
1011
1012         our $file_parent = $input_params{'file_parent'};
1013         if (defined $file_parent) {
1014                 if (!validate_pathname($file_parent)) {
1015                         die_error(400, "Invalid file parent parameter");
1016                 }
1017         }
1018
1019         # parameters which are refnames
1020         our $hash = $input_params{'hash'};
1021         if (defined $hash) {
1022                 if (!validate_refname($hash)) {
1023                         die_error(400, "Invalid hash parameter");
1024                 }
1025         }
1026
1027         our $hash_parent = $input_params{'hash_parent'};
1028         if (defined $hash_parent) {
1029                 if (!validate_refname($hash_parent)) {
1030                         die_error(400, "Invalid hash parent parameter");
1031                 }
1032         }
1033
1034         our $hash_base = $input_params{'hash_base'};
1035         if (defined $hash_base) {
1036                 if (!validate_refname($hash_base)) {
1037                         die_error(400, "Invalid hash base parameter");
1038                 }
1039         }
1040
1041         our @extra_options = @{$input_params{'extra_options'}};
1042         # @extra_options is always defined, since it can only be (currently) set from
1043         # CGI, and $cgi->param() returns the empty array in array context if the param
1044         # is not set
1045         foreach my $opt (@extra_options) {
1046                 if (not exists $allowed_options{$opt}) {
1047                         die_error(400, "Invalid option parameter");
1048                 }
1049                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1050                         die_error(400, "Invalid option parameter for this action");
1051                 }
1052         }
1053
1054         our $hash_parent_base = $input_params{'hash_parent_base'};
1055         if (defined $hash_parent_base) {
1056                 if (!validate_refname($hash_parent_base)) {
1057                         die_error(400, "Invalid hash parent base parameter");
1058                 }
1059         }
1060
1061         # other parameters
1062         our $page = $input_params{'page'};
1063         if (defined $page) {
1064                 if ($page =~ m/[^0-9]/) {
1065                         die_error(400, "Invalid page parameter");
1066                 }
1067         }
1068
1069         our $searchtype = $input_params{'searchtype'};
1070         if (defined $searchtype) {
1071                 if ($searchtype =~ m/[^a-z]/) {
1072                         die_error(400, "Invalid searchtype parameter");
1073                 }
1074         }
1075
1076         our $search_use_regexp = $input_params{'search_use_regexp'};
1077
1078         our $searchtext = $input_params{'searchtext'};
1079         our $search_regexp;
1080         if (defined $searchtext) {
1081                 if (length($searchtext) < 2) {
1082                         die_error(403, "At least two characters are required for search parameter");
1083                 }
1084                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1085         }
1086 }
1087
1088 # path to the current git repository
1089 our $git_dir;
1090 sub evaluate_git_dir {
1091         our $git_dir = "$projectroot/$project" if $project;
1092 }
1093
1094 our (@snapshot_fmts, $git_avatar);
1095 sub configure_gitweb_features {
1096         # list of supported snapshot formats
1097         our @snapshot_fmts = gitweb_get_feature('snapshot');
1098         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1099
1100         # check that the avatar feature is set to a known provider name,
1101         # and for each provider check if the dependencies are satisfied.
1102         # if the provider name is invalid or the dependencies are not met,
1103         # reset $git_avatar to the empty string.
1104         our ($git_avatar) = gitweb_get_feature('avatar');
1105         if ($git_avatar eq 'gravatar') {
1106                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1107         } elsif ($git_avatar eq 'picon') {
1108                 # no dependencies
1109         } else {
1110                 $git_avatar = '';
1111         }
1112 }
1113
1114 # custom error handler: 'die <message>' is Internal Server Error
1115 sub handle_errors_html {
1116         my $msg = shift; # it is already HTML escaped
1117
1118         # to avoid infinite loop where error occurs in die_error,
1119         # change handler to default handler, disabling handle_errors_html
1120         set_message("Error occured when inside die_error:\n$msg");
1121
1122         # you cannot jump out of die_error when called as error handler;
1123         # the subroutine set via CGI::Carp::set_message is called _after_
1124         # HTTP headers are already written, so it cannot write them itself
1125         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1126 }
1127 set_message(\&handle_errors_html);
1128
1129 # dispatch
1130 sub dispatch {
1131         if (!defined $action) {
1132                 if (defined $hash) {
1133                         $action = git_get_type($hash);
1134                         $action or die_error(404, "Object does not exist");
1135                 } elsif (defined $hash_base && defined $file_name) {
1136                         $action = git_get_type("$hash_base:$file_name");
1137                         $action or die_error(404, "File or directory does not exist");
1138                 } elsif (defined $project) {
1139                         $action = 'summary';
1140                 } else {
1141                         $action = 'project_list';
1142                 }
1143         }
1144         if (!defined($actions{$action})) {
1145                 die_error(400, "Unknown action");
1146         }
1147         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1148             !$project) {
1149                 die_error(400, "Project needed");
1150         }
1151         $actions{$action}->();
1152 }
1153
1154 sub reset_timer {
1155         our $t0 = [ gettimeofday() ]
1156                 if defined $t0;
1157         our $number_of_git_cmds = 0;
1158 }
1159
1160 our $first_request = 1;
1161 sub run_request {
1162         reset_timer();
1163
1164         evaluate_uri();
1165         if ($first_request) {
1166                 evaluate_gitweb_config();
1167                 evaluate_git_version();
1168         }
1169         if ($per_request_config) {
1170                 if (ref($per_request_config) eq 'CODE') {
1171                         $per_request_config->();
1172                 } elsif (!$first_request) {
1173                         evaluate_gitweb_config();
1174                 }
1175         }
1176         check_loadavg();
1177
1178         # $projectroot and $projects_list might be set in gitweb config file
1179         $projects_list ||= $projectroot;
1180
1181         evaluate_query_params();
1182         evaluate_path_info();
1183         evaluate_and_validate_params();
1184         evaluate_git_dir();
1185
1186         configure_gitweb_features();
1187
1188         dispatch();
1189 }
1190
1191 our $is_last_request = sub { 1 };
1192 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1193 our $CGI = 'CGI';
1194 our $cgi;
1195 sub configure_as_fcgi {
1196         require CGI::Fast;
1197         our $CGI = 'CGI::Fast';
1198
1199         my $request_number = 0;
1200         # let each child service 100 requests
1201         our $is_last_request = sub { ++$request_number > 100 };
1202 }
1203 sub evaluate_argv {
1204         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1205         configure_as_fcgi()
1206                 if $script_name =~ /\.fcgi$/;
1207
1208         return unless (@ARGV);
1209
1210         require Getopt::Long;
1211         Getopt::Long::GetOptions(
1212                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1213                 'nproc|n=i' => sub {
1214                         my ($arg, $val) = @_;
1215                         return unless eval { require FCGI::ProcManager; 1; };
1216                         my $proc_manager = FCGI::ProcManager->new({
1217                                 n_processes => $val,
1218                         });
1219                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1220                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1221                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1222                 },
1223         );
1224 }
1225
1226 sub run {
1227         evaluate_argv();
1228
1229         $first_request = 1;
1230         $pre_listen_hook->()
1231                 if $pre_listen_hook;
1232
1233  REQUEST:
1234         while ($cgi = $CGI->new()) {
1235                 $pre_dispatch_hook->()
1236                         if $pre_dispatch_hook;
1237
1238                 run_request();
1239
1240                 $post_dispatch_hook->()
1241                         if $post_dispatch_hook;
1242                 $first_request = 0;
1243
1244                 last REQUEST if ($is_last_request->());
1245         }
1246
1247  DONE_GITWEB:
1248         1;
1249 }
1250
1251 run();
1252
1253 if (defined caller) {
1254         # wrapped in a subroutine processing requests,
1255         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1256         return;
1257 } else {
1258         # pure CGI script, serving single request
1259         exit;
1260 }
1261
1262 ## ======================================================================
1263 ## action links
1264
1265 # possible values of extra options
1266 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1267 # -replay => 1      - start from a current view (replay with modifications)
1268 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1269 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1270 sub href {
1271         my %params = @_;
1272         # default is to use -absolute url() i.e. $my_uri
1273         my $href = $params{-full} ? $my_url : $my_uri;
1274
1275         # implicit -replay, must be first of implicit params
1276         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1277
1278         $params{'project'} = $project unless exists $params{'project'};
1279
1280         if ($params{-replay}) {
1281                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1282                         if (!exists $params{$name}) {
1283                                 $params{$name} = $input_params{$name};
1284                         }
1285                 }
1286         }
1287
1288         my $use_pathinfo = gitweb_check_feature('pathinfo');
1289         if (defined $params{'project'} &&
1290             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1291                 # try to put as many parameters as possible in PATH_INFO:
1292                 #   - project name
1293                 #   - action
1294                 #   - hash_parent or hash_parent_base:/file_parent
1295                 #   - hash or hash_base:/filename
1296                 #   - the snapshot_format as an appropriate suffix
1297
1298                 # When the script is the root DirectoryIndex for the domain,
1299                 # $href here would be something like http://gitweb.example.com/
1300                 # Thus, we strip any trailing / from $href, to spare us double
1301                 # slashes in the final URL
1302                 $href =~ s,/$,,;
1303
1304                 # Then add the project name, if present
1305                 $href .= "/".esc_path_info($params{'project'});
1306                 delete $params{'project'};
1307
1308                 # since we destructively absorb parameters, we keep this
1309                 # boolean that remembers if we're handling a snapshot
1310                 my $is_snapshot = $params{'action'} eq 'snapshot';
1311
1312                 # Summary just uses the project path URL, any other action is
1313                 # added to the URL
1314                 if (defined $params{'action'}) {
1315                         $href .= "/".esc_path_info($params{'action'})
1316                                 unless $params{'action'} eq 'summary';
1317                         delete $params{'action'};
1318                 }
1319
1320                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1321                 # stripping nonexistent or useless pieces
1322                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1323                         || $params{'hash_parent'} || $params{'hash'});
1324                 if (defined $params{'hash_base'}) {
1325                         if (defined $params{'hash_parent_base'}) {
1326                                 $href .= esc_path_info($params{'hash_parent_base'});
1327                                 # skip the file_parent if it's the same as the file_name
1328                                 if (defined $params{'file_parent'}) {
1329                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1330                                                 delete $params{'file_parent'};
1331                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1332                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1333                                                 delete $params{'file_parent'};
1334                                         }
1335                                 }
1336                                 $href .= "..";
1337                                 delete $params{'hash_parent'};
1338                                 delete $params{'hash_parent_base'};
1339                         } elsif (defined $params{'hash_parent'}) {
1340                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1341                                 delete $params{'hash_parent'};
1342                         }
1343
1344                         $href .= esc_path_info($params{'hash_base'});
1345                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1346                                 $href .= ":/".esc_path_info($params{'file_name'});
1347                                 delete $params{'file_name'};
1348                         }
1349                         delete $params{'hash'};
1350                         delete $params{'hash_base'};
1351                 } elsif (defined $params{'hash'}) {
1352                         $href .= esc_path_info($params{'hash'});
1353                         delete $params{'hash'};
1354                 }
1355
1356                 # If the action was a snapshot, we can absorb the
1357                 # snapshot_format parameter too
1358                 if ($is_snapshot) {
1359                         my $fmt = $params{'snapshot_format'};
1360                         # snapshot_format should always be defined when href()
1361                         # is called, but just in case some code forgets, we
1362                         # fall back to the default
1363                         $fmt ||= $snapshot_fmts[0];
1364                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1365                         delete $params{'snapshot_format'};
1366                 }
1367         }
1368
1369         # now encode the parameters explicitly
1370         my @result = ();
1371         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1372                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1373                 if (defined $params{$name}) {
1374                         if (ref($params{$name}) eq "ARRAY") {
1375                                 foreach my $par (@{$params{$name}}) {
1376                                         push @result, $symbol . "=" . esc_param($par);
1377                                 }
1378                         } else {
1379                                 push @result, $symbol . "=" . esc_param($params{$name});
1380                         }
1381                 }
1382         }
1383         $href .= "?" . join(';', @result) if scalar @result;
1384
1385         # final transformation: trailing spaces must be escaped (URI-encoded)
1386         $href =~ s/(\s+)$/CGI::escape($1)/e;
1387
1388         if ($params{-anchor}) {
1389                 $href .= "#".esc_param($params{-anchor});
1390         }
1391
1392         return $href;
1393 }
1394
1395
1396 ## ======================================================================
1397 ## validation, quoting/unquoting and escaping
1398
1399 sub validate_action {
1400         my $input = shift || return undef;
1401         return undef unless exists $actions{$input};
1402         return $input;
1403 }
1404
1405 sub validate_project {
1406         my $input = shift || return undef;
1407         if (!validate_pathname($input) ||
1408                 !(-d "$projectroot/$input") ||
1409                 !check_export_ok("$projectroot/$input") ||
1410                 ($strict_export && !project_in_list($input))) {
1411                 return undef;
1412         } else {
1413                 return $input;
1414         }
1415 }
1416
1417 sub validate_pathname {
1418         my $input = shift || return undef;
1419
1420         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1421         # at the beginning, at the end, and between slashes.
1422         # also this catches doubled slashes
1423         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1424                 return undef;
1425         }
1426         # no null characters
1427         if ($input =~ m!\0!) {
1428                 return undef;
1429         }
1430         return $input;
1431 }
1432
1433 sub validate_refname {
1434         my $input = shift || return undef;
1435
1436         # textual hashes are O.K.
1437         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1438                 return $input;
1439         }
1440         # it must be correct pathname
1441         $input = validate_pathname($input)
1442                 or return undef;
1443         # restrictions on ref name according to git-check-ref-format
1444         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1445                 return undef;
1446         }
1447         return $input;
1448 }
1449
1450 # decode sequences of octets in utf8 into Perl's internal form,
1451 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1452 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1453 sub to_utf8 {
1454         my $str = shift;
1455         return undef unless defined $str;
1456
1457         if (utf8::is_utf8($str) || utf8::decode($str)) {
1458                 return $str;
1459         } else {
1460                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1461         }
1462 }
1463
1464 # quote unsafe chars, but keep the slash, even when it's not
1465 # correct, but quoted slashes look too horrible in bookmarks
1466 sub esc_param {
1467         my $str = shift;
1468         return undef unless defined $str;
1469         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1470         $str =~ s/ /\+/g;
1471         return $str;
1472 }
1473
1474 # the quoting rules for path_info fragment are slightly different
1475 sub esc_path_info {
1476         my $str = shift;
1477         return undef unless defined $str;
1478
1479         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1480         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1481
1482         return $str;
1483 }
1484
1485 # quote unsafe chars in whole URL, so some characters cannot be quoted
1486 sub esc_url {
1487         my $str = shift;
1488         return undef unless defined $str;
1489         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1490         $str =~ s/ /\+/g;
1491         return $str;
1492 }
1493
1494 # quote unsafe characters in HTML attributes
1495 sub esc_attr {
1496
1497         # for XHTML conformance escaping '"' to '&quot;' is not enough
1498         return esc_html(@_);
1499 }
1500
1501 # replace invalid utf8 character with SUBSTITUTION sequence
1502 sub esc_html {
1503         my $str = shift;
1504         my %opts = @_;
1505
1506         return undef unless defined $str;
1507
1508         $str = to_utf8($str);
1509         $str = $cgi->escapeHTML($str);
1510         if ($opts{'-nbsp'}) {
1511                 $str =~ s/ /&nbsp;/g;
1512         }
1513         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1514         return $str;
1515 }
1516
1517 # quote control characters and escape filename to HTML
1518 sub esc_path {
1519         my $str = shift;
1520         my %opts = @_;
1521
1522         return undef unless defined $str;
1523
1524         $str = to_utf8($str);
1525         $str = $cgi->escapeHTML($str);
1526         if ($opts{'-nbsp'}) {
1527                 $str =~ s/ /&nbsp;/g;
1528         }
1529         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1530         return $str;
1531 }
1532
1533 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1534 sub sanitize {
1535         my $str = shift;
1536
1537         return undef unless defined $str;
1538
1539         $str = to_utf8($str);
1540         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1541         return $str;
1542 }
1543
1544 # Make control characters "printable", using character escape codes (CEC)
1545 sub quot_cec {
1546         my $cntrl = shift;
1547         my %opts = @_;
1548         my %es = ( # character escape codes, aka escape sequences
1549                 "\t" => '\t',   # tab            (HT)
1550                 "\n" => '\n',   # line feed      (LF)
1551                 "\r" => '\r',   # carrige return (CR)
1552                 "\f" => '\f',   # form feed      (FF)
1553                 "\b" => '\b',   # backspace      (BS)
1554                 "\a" => '\a',   # alarm (bell)   (BEL)
1555                 "\e" => '\e',   # escape         (ESC)
1556                 "\013" => '\v', # vertical tab   (VT)
1557                 "\000" => '\0', # nul character  (NUL)
1558         );
1559         my $chr = ( (exists $es{$cntrl})
1560                     ? $es{$cntrl}
1561                     : sprintf('\%2x', ord($cntrl)) );
1562         if ($opts{-nohtml}) {
1563                 return $chr;
1564         } else {
1565                 return "<span class=\"cntrl\">$chr</span>";
1566         }
1567 }
1568
1569 # Alternatively use unicode control pictures codepoints,
1570 # Unicode "printable representation" (PR)
1571 sub quot_upr {
1572         my $cntrl = shift;
1573         my %opts = @_;
1574
1575         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1576         if ($opts{-nohtml}) {
1577                 return $chr;
1578         } else {
1579                 return "<span class=\"cntrl\">$chr</span>";
1580         }
1581 }
1582
1583 # git may return quoted and escaped filenames
1584 sub unquote {
1585         my $str = shift;
1586
1587         sub unq {
1588                 my $seq = shift;
1589                 my %es = ( # character escape codes, aka escape sequences
1590                         't' => "\t",   # tab            (HT, TAB)
1591                         'n' => "\n",   # newline        (NL)
1592                         'r' => "\r",   # return         (CR)
1593                         'f' => "\f",   # form feed      (FF)
1594                         'b' => "\b",   # backspace      (BS)
1595                         'a' => "\a",   # alarm (bell)   (BEL)
1596                         'e' => "\e",   # escape         (ESC)
1597                         'v' => "\013", # vertical tab   (VT)
1598                 );
1599
1600                 if ($seq =~ m/^[0-7]{1,3}$/) {
1601                         # octal char sequence
1602                         return chr(oct($seq));
1603                 } elsif (exists $es{$seq}) {
1604                         # C escape sequence, aka character escape code
1605                         return $es{$seq};
1606                 }
1607                 # quoted ordinary character
1608                 return $seq;
1609         }
1610
1611         if ($str =~ m/^"(.*)"$/) {
1612                 # needs unquoting
1613                 $str = $1;
1614                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1615         }
1616         return $str;
1617 }
1618
1619 # escape tabs (convert tabs to spaces)
1620 sub untabify {
1621         my $line = shift;
1622
1623         while ((my $pos = index($line, "\t")) != -1) {
1624                 if (my $count = (8 - ($pos % 8))) {
1625                         my $spaces = ' ' x $count;
1626                         $line =~ s/\t/$spaces/;
1627                 }
1628         }
1629
1630         return $line;
1631 }
1632
1633 sub project_in_list {
1634         my $project = shift;
1635         my @list = git_get_projects_list();
1636         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1637 }
1638
1639 ## ----------------------------------------------------------------------
1640 ## HTML aware string manipulation
1641
1642 # Try to chop given string on a word boundary between position
1643 # $len and $len+$add_len. If there is no word boundary there,
1644 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1645 # (marking chopped part) would be longer than given string.
1646 sub chop_str {
1647         my $str = shift;
1648         my $len = shift;
1649         my $add_len = shift || 10;
1650         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1651
1652         # Make sure perl knows it is utf8 encoded so we don't
1653         # cut in the middle of a utf8 multibyte char.
1654         $str = to_utf8($str);
1655
1656         # allow only $len chars, but don't cut a word if it would fit in $add_len
1657         # if it doesn't fit, cut it if it's still longer than the dots we would add
1658         # remove chopped character entities entirely
1659
1660         # when chopping in the middle, distribute $len into left and right part
1661         # return early if chopping wouldn't make string shorter
1662         if ($where eq 'center') {
1663                 return $str if ($len + 5 >= length($str)); # filler is length 5
1664                 $len = int($len/2);
1665         } else {
1666                 return $str if ($len + 4 >= length($str)); # filler is length 4
1667         }
1668
1669         # regexps: ending and beginning with word part up to $add_len
1670         my $endre = qr/.{$len}\w{0,$add_len}/;
1671         my $begre = qr/\w{0,$add_len}.{$len}/;
1672
1673         if ($where eq 'left') {
1674                 $str =~ m/^(.*?)($begre)$/;
1675                 my ($lead, $body) = ($1, $2);
1676                 if (length($lead) > 4) {
1677                         $lead = " ...";
1678                 }
1679                 return "$lead$body";
1680
1681         } elsif ($where eq 'center') {
1682                 $str =~ m/^($endre)(.*)$/;
1683                 my ($left, $str)  = ($1, $2);
1684                 $str =~ m/^(.*?)($begre)$/;
1685                 my ($mid, $right) = ($1, $2);
1686                 if (length($mid) > 5) {
1687                         $mid = " ... ";
1688                 }
1689                 return "$left$mid$right";
1690
1691         } else {
1692                 $str =~ m/^($endre)(.*)$/;
1693                 my $body = $1;
1694                 my $tail = $2;
1695                 if (length($tail) > 4) {
1696                         $tail = "... ";
1697                 }
1698                 return "$body$tail";
1699         }
1700 }
1701
1702 # takes the same arguments as chop_str, but also wraps a <span> around the
1703 # result with a title attribute if it does get chopped. Additionally, the
1704 # string is HTML-escaped.
1705 sub chop_and_escape_str {
1706         my ($str) = @_;
1707
1708         my $chopped = chop_str(@_);
1709         $str = to_utf8($str);
1710         if ($chopped eq $str) {
1711                 return esc_html($chopped);
1712         } else {
1713                 $str =~ s/[[:cntrl:]]/?/g;
1714                 return $cgi->span({-title=>$str}, esc_html($chopped));
1715         }
1716 }
1717
1718 ## ----------------------------------------------------------------------
1719 ## functions returning short strings
1720
1721 # CSS class for given age value (in seconds)
1722 sub age_class {
1723         my $age = shift;
1724
1725         if (!defined $age) {
1726                 return "noage";
1727         } elsif ($age < 60*60*2) {
1728                 return "age0";
1729         } elsif ($age < 60*60*24*2) {
1730                 return "age1";
1731         } else {
1732                 return "age2";
1733         }
1734 }
1735
1736 # convert age in seconds to "nn units ago" string
1737 sub age_string {
1738         my $age = shift;
1739         my $age_str;
1740
1741         if ($age > 60*60*24*365*2) {
1742                 $age_str = (int $age/60/60/24/365);
1743                 $age_str .= " years ago";
1744         } elsif ($age > 60*60*24*(365/12)*2) {
1745                 $age_str = int $age/60/60/24/(365/12);
1746                 $age_str .= " months ago";
1747         } elsif ($age > 60*60*24*7*2) {
1748                 $age_str = int $age/60/60/24/7;
1749                 $age_str .= " weeks ago";
1750         } elsif ($age > 60*60*24*2) {
1751                 $age_str = int $age/60/60/24;
1752                 $age_str .= " days ago";
1753         } elsif ($age > 60*60*2) {
1754                 $age_str = int $age/60/60;
1755                 $age_str .= " hours ago";
1756         } elsif ($age > 60*2) {
1757                 $age_str = int $age/60;
1758                 $age_str .= " min ago";
1759         } elsif ($age > 2) {
1760                 $age_str = int $age;
1761                 $age_str .= " sec ago";
1762         } else {
1763                 $age_str .= " right now";
1764         }
1765         return $age_str;
1766 }
1767
1768 use constant {
1769         S_IFINVALID => 0030000,
1770         S_IFGITLINK => 0160000,
1771 };
1772
1773 # submodule/subproject, a commit object reference
1774 sub S_ISGITLINK {
1775         my $mode = shift;
1776
1777         return (($mode & S_IFMT) == S_IFGITLINK)
1778 }
1779
1780 # convert file mode in octal to symbolic file mode string
1781 sub mode_str {
1782         my $mode = oct shift;
1783
1784         if (S_ISGITLINK($mode)) {
1785                 return 'm---------';
1786         } elsif (S_ISDIR($mode & S_IFMT)) {
1787                 return 'drwxr-xr-x';
1788         } elsif (S_ISLNK($mode)) {
1789                 return 'lrwxrwxrwx';
1790         } elsif (S_ISREG($mode)) {
1791                 # git cares only about the executable bit
1792                 if ($mode & S_IXUSR) {
1793                         return '-rwxr-xr-x';
1794                 } else {
1795                         return '-rw-r--r--';
1796                 };
1797         } else {
1798                 return '----------';
1799         }
1800 }
1801
1802 # convert file mode in octal to file type string
1803 sub file_type {
1804         my $mode = shift;
1805
1806         if ($mode !~ m/^[0-7]+$/) {
1807                 return $mode;
1808         } else {
1809                 $mode = oct $mode;
1810         }
1811
1812         if (S_ISGITLINK($mode)) {
1813                 return "submodule";
1814         } elsif (S_ISDIR($mode & S_IFMT)) {
1815                 return "directory";
1816         } elsif (S_ISLNK($mode)) {
1817                 return "symlink";
1818         } elsif (S_ISREG($mode)) {
1819                 return "file";
1820         } else {
1821                 return "unknown";
1822         }
1823 }
1824
1825 # convert file mode in octal to file type description string
1826 sub file_type_long {
1827         my $mode = shift;
1828
1829         if ($mode !~ m/^[0-7]+$/) {
1830                 return $mode;
1831         } else {
1832                 $mode = oct $mode;
1833         }
1834
1835         if (S_ISGITLINK($mode)) {
1836                 return "submodule";
1837         } elsif (S_ISDIR($mode & S_IFMT)) {
1838                 return "directory";
1839         } elsif (S_ISLNK($mode)) {
1840                 return "symlink";
1841         } elsif (S_ISREG($mode)) {
1842                 if ($mode & S_IXUSR) {
1843                         return "executable";
1844                 } else {
1845                         return "file";
1846                 };
1847         } else {
1848                 return "unknown";
1849         }
1850 }
1851
1852
1853 ## ----------------------------------------------------------------------
1854 ## functions returning short HTML fragments, or transforming HTML fragments
1855 ## which don't belong to other sections
1856
1857 # format line of commit message.
1858 sub format_log_line_html {
1859         my $line = shift;
1860
1861         $line = esc_html($line, -nbsp=>1);
1862         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1863                 $cgi->a({-href => href(action=>"object", hash=>$1),
1864                                         -class => "text"}, $1);
1865         }eg;
1866
1867         return $line;
1868 }
1869
1870 # format marker of refs pointing to given object
1871
1872 # the destination action is chosen based on object type and current context:
1873 # - for annotated tags, we choose the tag view unless it's the current view
1874 #   already, in which case we go to shortlog view
1875 # - for other refs, we keep the current view if we're in history, shortlog or
1876 #   log view, and select shortlog otherwise
1877 sub format_ref_marker {
1878         my ($refs, $id) = @_;
1879         my $markers = '';
1880
1881         if (defined $refs->{$id}) {
1882                 foreach my $ref (@{$refs->{$id}}) {
1883                         # this code exploits the fact that non-lightweight tags are the
1884                         # only indirect objects, and that they are the only objects for which
1885                         # we want to use tag instead of shortlog as action
1886                         my ($type, $name) = qw();
1887                         my $indirect = ($ref =~ s/\^\{\}$//);
1888                         # e.g. tags/v2.6.11 or heads/next
1889                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1890                                 $type = $1;
1891                                 $name = $2;
1892                         } else {
1893                                 $type = "ref";
1894                                 $name = $ref;
1895                         }
1896
1897                         my $class = $type;
1898                         $class .= " indirect" if $indirect;
1899
1900                         my $dest_action = "shortlog";
1901
1902                         if ($indirect) {
1903                                 $dest_action = "tag" unless $action eq "tag";
1904                         } elsif ($action =~ /^(history|(short)?log)$/) {
1905                                 $dest_action = $action;
1906                         }
1907
1908                         my $dest = "";
1909                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1910                         $dest .= $ref;
1911
1912                         my $link = $cgi->a({
1913                                 -href => href(
1914                                         action=>$dest_action,
1915                                         hash=>$dest
1916                                 )}, $name);
1917
1918                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1919                                 $link . "</span>";
1920                 }
1921         }
1922
1923         if ($markers) {
1924                 return ' <span class="refs">'. $markers . '</span>';
1925         } else {
1926                 return "";
1927         }
1928 }
1929
1930 # format, perhaps shortened and with markers, title line
1931 sub format_subject_html {
1932         my ($long, $short, $href, $extra) = @_;
1933         $extra = '' unless defined($extra);
1934
1935         if (length($short) < length($long)) {
1936                 $long =~ s/[[:cntrl:]]/?/g;
1937                 return $cgi->a({-href => $href, -class => "list subject",
1938                                 -title => to_utf8($long)},
1939                        esc_html($short)) . $extra;
1940         } else {
1941                 return $cgi->a({-href => $href, -class => "list subject"},
1942                        esc_html($long)) . $extra;
1943         }
1944 }
1945
1946 # Rather than recomputing the url for an email multiple times, we cache it
1947 # after the first hit. This gives a visible benefit in views where the avatar
1948 # for the same email is used repeatedly (e.g. shortlog).
1949 # The cache is shared by all avatar engines (currently gravatar only), which
1950 # are free to use it as preferred. Since only one avatar engine is used for any
1951 # given page, there's no risk for cache conflicts.
1952 our %avatar_cache = ();
1953
1954 # Compute the picon url for a given email, by using the picon search service over at
1955 # http://www.cs.indiana.edu/picons/search.html
1956 sub picon_url {
1957         my $email = lc shift;
1958         if (!$avatar_cache{$email}) {
1959                 my ($user, $domain) = split('@', $email);
1960                 $avatar_cache{$email} =
1961                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1962                         "$domain/$user/" .
1963                         "users+domains+unknown/up/single";
1964         }
1965         return $avatar_cache{$email};
1966 }
1967
1968 # Compute the gravatar url for a given email, if it's not in the cache already.
1969 # Gravatar stores only the part of the URL before the size, since that's the
1970 # one computationally more expensive. This also allows reuse of the cache for
1971 # different sizes (for this particular engine).
1972 sub gravatar_url {
1973         my $email = lc shift;
1974         my $size = shift;
1975         $avatar_cache{$email} ||=
1976                 "http://www.gravatar.com/avatar/" .
1977                         Digest::MD5::md5_hex($email) . "?s=";
1978         return $avatar_cache{$email} . $size;
1979 }
1980
1981 # Insert an avatar for the given $email at the given $size if the feature
1982 # is enabled.
1983 sub git_get_avatar {
1984         my ($email, %opts) = @_;
1985         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1986         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1987         $opts{-size} ||= 'default';
1988         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1989         my $url = "";
1990         if ($git_avatar eq 'gravatar') {
1991                 $url = gravatar_url($email, $size);
1992         } elsif ($git_avatar eq 'picon') {
1993                 $url = picon_url($email);
1994         }
1995         # Other providers can be added by extending the if chain, defining $url
1996         # as needed. If no variant puts something in $url, we assume avatars
1997         # are completely disabled/unavailable.
1998         if ($url) {
1999                 return $pre_white .
2000                        "<img width=\"$size\" " .
2001                             "class=\"avatar\" " .
2002                             "src=\"".esc_url($url)."\" " .
2003                             "alt=\"\" " .
2004                        "/>" . $post_white;
2005         } else {
2006                 return "";
2007         }
2008 }
2009
2010 sub format_search_author {
2011         my ($author, $searchtype, $displaytext) = @_;
2012         my $have_search = gitweb_check_feature('search');
2013
2014         if ($have_search) {
2015                 my $performed = "";
2016                 if ($searchtype eq 'author') {
2017                         $performed = "authored";
2018                 } elsif ($searchtype eq 'committer') {
2019                         $performed = "committed";
2020                 }
2021
2022                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2023                                 searchtext=>$author,
2024                                 searchtype=>$searchtype), class=>"list",
2025                                 title=>"Search for commits $performed by $author"},
2026                                 $displaytext);
2027
2028         } else {
2029                 return $displaytext;
2030         }
2031 }
2032
2033 # format the author name of the given commit with the given tag
2034 # the author name is chopped and escaped according to the other
2035 # optional parameters (see chop_str).
2036 sub format_author_html {
2037         my $tag = shift;
2038         my $co = shift;
2039         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2040         return "<$tag class=\"author\">" .
2041                format_search_author($co->{'author_name'}, "author",
2042                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2043                        $author) .
2044                "</$tag>";
2045 }
2046
2047 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2048 sub format_git_diff_header_line {
2049         my $line = shift;
2050         my $diffinfo = shift;
2051         my ($from, $to) = @_;
2052
2053         if ($diffinfo->{'nparents'}) {
2054                 # combined diff
2055                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2056                 if ($to->{'href'}) {
2057                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2058                                          esc_path($to->{'file'}));
2059                 } else { # file was deleted (no href)
2060                         $line .= esc_path($to->{'file'});
2061                 }
2062         } else {
2063                 # "ordinary" diff
2064                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2065                 if ($from->{'href'}) {
2066                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2067                                          'a/' . esc_path($from->{'file'}));
2068                 } else { # file was added (no href)
2069                         $line .= 'a/' . esc_path($from->{'file'});
2070                 }
2071                 $line .= ' ';
2072                 if ($to->{'href'}) {
2073                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2074                                          'b/' . esc_path($to->{'file'}));
2075                 } else { # file was deleted
2076                         $line .= 'b/' . esc_path($to->{'file'});
2077                 }
2078         }
2079
2080         return "<div class=\"diff header\">$line</div>\n";
2081 }
2082
2083 # format extended diff header line, before patch itself
2084 sub format_extended_diff_header_line {
2085         my $line = shift;
2086         my $diffinfo = shift;
2087         my ($from, $to) = @_;
2088
2089         # match <path>
2090         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2091                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2092                                        esc_path($from->{'file'}));
2093         }
2094         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2095                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2096                                  esc_path($to->{'file'}));
2097         }
2098         # match single <mode>
2099         if ($line =~ m/\s(\d{6})$/) {
2100                 $line .= '<span class="info"> (' .
2101                          file_type_long($1) .
2102                          ')</span>';
2103         }
2104         # match <hash>
2105         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2106                 # can match only for combined diff
2107                 $line = 'index ';
2108                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2109                         if ($from->{'href'}[$i]) {
2110                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2111                                                   -class=>"hash"},
2112                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2113                         } else {
2114                                 $line .= '0' x 7;
2115                         }
2116                         # separator
2117                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2118                 }
2119                 $line .= '..';
2120                 if ($to->{'href'}) {
2121                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2122                                          substr($diffinfo->{'to_id'},0,7));
2123                 } else {
2124                         $line .= '0' x 7;
2125                 }
2126
2127         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2128                 # can match only for ordinary diff
2129                 my ($from_link, $to_link);
2130                 if ($from->{'href'}) {
2131                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2132                                              substr($diffinfo->{'from_id'},0,7));
2133                 } else {
2134                         $from_link = '0' x 7;
2135                 }
2136                 if ($to->{'href'}) {
2137                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2138                                            substr($diffinfo->{'to_id'},0,7));
2139                 } else {
2140                         $to_link = '0' x 7;
2141                 }
2142                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2143                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2144         }
2145
2146         return $line . "<br/>\n";
2147 }
2148
2149 # format from-file/to-file diff header
2150 sub format_diff_from_to_header {
2151         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2152         my $line;
2153         my $result = '';
2154
2155         $line = $from_line;
2156         #assert($line =~ m/^---/) if DEBUG;
2157         # no extra formatting for "^--- /dev/null"
2158         if (! $diffinfo->{'nparents'}) {
2159                 # ordinary (single parent) diff
2160                 if ($line =~ m!^--- "?a/!) {
2161                         if ($from->{'href'}) {
2162                                 $line = '--- a/' .
2163                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2164                                                 esc_path($from->{'file'}));
2165                         } else {
2166                                 $line = '--- a/' .
2167                                         esc_path($from->{'file'});
2168                         }
2169                 }
2170                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2171
2172         } else {
2173                 # combined diff (merge commit)
2174                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2175                         if ($from->{'href'}[$i]) {
2176                                 $line = '--- ' .
2177                                         $cgi->a({-href=>href(action=>"blobdiff",
2178                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2179                                                              hash_parent_base=>$parents[$i],
2180                                                              file_parent=>$from->{'file'}[$i],
2181                                                              hash=>$diffinfo->{'to_id'},
2182                                                              hash_base=>$hash,
2183                                                              file_name=>$to->{'file'}),
2184                                                  -class=>"path",
2185                                                  -title=>"diff" . ($i+1)},
2186                                                 $i+1) .
2187                                         '/' .
2188                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2189                                                 esc_path($from->{'file'}[$i]));
2190                         } else {
2191                                 $line = '--- /dev/null';
2192                         }
2193                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2194                 }
2195         }
2196
2197         $line = $to_line;
2198         #assert($line =~ m/^\+\+\+/) if DEBUG;
2199         # no extra formatting for "^+++ /dev/null"
2200         if ($line =~ m!^\+\+\+ "?b/!) {
2201                 if ($to->{'href'}) {
2202                         $line = '+++ b/' .
2203                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2204                                         esc_path($to->{'file'}));
2205                 } else {
2206                         $line = '+++ b/' .
2207                                 esc_path($to->{'file'});
2208                 }
2209         }
2210         $result .= qq!<div class="diff to_file">$line</div>\n!;
2211
2212         return $result;
2213 }
2214
2215 # create note for patch simplified by combined diff
2216 sub format_diff_cc_simplified {
2217         my ($diffinfo, @parents) = @_;
2218         my $result = '';
2219
2220         $result .= "<div class=\"diff header\">" .
2221                    "diff --cc ";
2222         if (!is_deleted($diffinfo)) {
2223                 $result .= $cgi->a({-href => href(action=>"blob",
2224                                                   hash_base=>$hash,
2225                                                   hash=>$diffinfo->{'to_id'},
2226                                                   file_name=>$diffinfo->{'to_file'}),
2227                                     -class => "path"},
2228                                    esc_path($diffinfo->{'to_file'}));
2229         } else {
2230                 $result .= esc_path($diffinfo->{'to_file'});
2231         }
2232         $result .= "</div>\n" . # class="diff header"
2233                    "<div class=\"diff nodifferences\">" .
2234                    "Simple merge" .
2235                    "</div>\n"; # class="diff nodifferences"
2236
2237         return $result;
2238 }
2239
2240 sub diff_line_class {
2241         my ($line, $from, $to) = @_;
2242
2243         # ordinary diff
2244         my $num_sign = 1;
2245         # combined diff
2246         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2247                 $num_sign = scalar @{$from->{'href'}};
2248         }
2249
2250         my @diff_line_classifier = (
2251                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2252                 { regexp => qr/^\\/,               class => "incomplete"  },
2253                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2254                 # classifier for context must come before classifier add/rem,
2255                 # or we would have to use more complicated regexp, for example
2256                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2257                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2258                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2259         );
2260         for my $clsfy (@diff_line_classifier) {
2261                 return $clsfy->{'class'}
2262                         if ($line =~ $clsfy->{'regexp'});
2263         }
2264
2265         # fallback
2266         return "";
2267 }
2268
2269 # assumes that $from and $to are defined and correctly filled,
2270 # and that $line holds a line of chunk header for unified diff
2271 sub format_unidiff_chunk_header {
2272         my ($line, $from, $to) = @_;
2273
2274         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2275                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2276
2277         $from_lines = 0 unless defined $from_lines;
2278         $to_lines   = 0 unless defined $to_lines;
2279
2280         if ($from->{'href'}) {
2281                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2282                                      -class=>"list"}, $from_text);
2283         }
2284         if ($to->{'href'}) {
2285                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2286                                      -class=>"list"}, $to_text);
2287         }
2288         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2289                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2290         return $line;
2291 }
2292
2293 # assumes that $from and $to are defined and correctly filled,
2294 # and that $line holds a line of chunk header for combined diff
2295 sub format_cc_diff_chunk_header {
2296         my ($line, $from, $to) = @_;
2297
2298         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2299         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2300
2301         @from_text = split(' ', $ranges);
2302         for (my $i = 0; $i < @from_text; ++$i) {
2303                 ($from_start[$i], $from_nlines[$i]) =
2304                         (split(',', substr($from_text[$i], 1)), 0);
2305         }
2306
2307         $to_text   = pop @from_text;
2308         $to_start  = pop @from_start;
2309         $to_nlines = pop @from_nlines;
2310
2311         $line = "<span class=\"chunk_info\">$prefix ";
2312         for (my $i = 0; $i < @from_text; ++$i) {
2313                 if ($from->{'href'}[$i]) {
2314                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2315                                           -class=>"list"}, $from_text[$i]);
2316                 } else {
2317                         $line .= $from_text[$i];
2318                 }
2319                 $line .= " ";
2320         }
2321         if ($to->{'href'}) {
2322                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2323                                   -class=>"list"}, $to_text);
2324         } else {
2325                 $line .= $to_text;
2326         }
2327         $line .= " $prefix</span>" .
2328                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2329         return $line;
2330 }
2331
2332 # process patch (diff) line (not to be used for diff headers),
2333 # returning class and HTML-formatted (but not wrapped) line
2334 sub process_diff_line {
2335         my $line = shift;
2336         my ($from, $to) = @_;
2337
2338         my $diff_class = diff_line_class($line, $from, $to);
2339
2340         chomp $line;
2341         $line = untabify($line);
2342
2343         if ($from && $to && $line =~ m/^\@{2} /) {
2344                 $line = format_unidiff_chunk_header($line, $from, $to);
2345                 return $diff_class, $line;
2346
2347         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2348                 $line = format_cc_diff_chunk_header($line, $from, $to);
2349                 return $diff_class, $line;
2350
2351         }
2352         return $diff_class, esc_html($line, -nbsp=>1);
2353 }
2354
2355 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2356 # linked.  Pass the hash of the tree/commit to snapshot.
2357 sub format_snapshot_links {
2358         my ($hash) = @_;
2359         my $num_fmts = @snapshot_fmts;
2360         if ($num_fmts > 1) {
2361                 # A parenthesized list of links bearing format names.
2362                 # e.g. "snapshot (_tar.gz_ _zip_)"
2363                 return "snapshot (" . join(' ', map
2364                         $cgi->a({
2365                                 -href => href(
2366                                         action=>"snapshot",
2367                                         hash=>$hash,
2368                                         snapshot_format=>$_
2369                                 )
2370                         }, $known_snapshot_formats{$_}{'display'})
2371                 , @snapshot_fmts) . ")";
2372         } elsif ($num_fmts == 1) {
2373                 # A single "snapshot" link whose tooltip bears the format name.
2374                 # i.e. "_snapshot_"
2375                 my ($fmt) = @snapshot_fmts;
2376                 return
2377                         $cgi->a({
2378                                 -href => href(
2379                                         action=>"snapshot",
2380                                         hash=>$hash,
2381                                         snapshot_format=>$fmt
2382                                 ),
2383                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2384                         }, "snapshot");
2385         } else { # $num_fmts == 0
2386                 return undef;
2387         }
2388 }
2389
2390 ## ......................................................................
2391 ## functions returning values to be passed, perhaps after some
2392 ## transformation, to other functions; e.g. returning arguments to href()
2393
2394 # returns hash to be passed to href to generate gitweb URL
2395 # in -title key it returns description of link
2396 sub get_feed_info {
2397         my $format = shift || 'Atom';
2398         my %res = (action => lc($format));
2399
2400         # feed links are possible only for project views
2401         return unless (defined $project);
2402         # some views should link to OPML, or to generic project feed,
2403         # or don't have specific feed yet (so they should use generic)
2404         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2405
2406         my $branch;
2407         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2408         # from tag links; this also makes possible to detect branch links
2409         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2410             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2411                 $branch = $1;
2412         }
2413         # find log type for feed description (title)
2414         my $type = 'log';
2415         if (defined $file_name) {
2416                 $type  = "history of $file_name";
2417                 $type .= "/" if ($action eq 'tree');
2418                 $type .= " on '$branch'" if (defined $branch);
2419         } else {
2420                 $type = "log of $branch" if (defined $branch);
2421         }
2422
2423         $res{-title} = $type;
2424         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2425         $res{'file_name'} = $file_name;
2426
2427         return %res;
2428 }
2429
2430 ## ----------------------------------------------------------------------
2431 ## git utility subroutines, invoking git commands
2432
2433 # returns path to the core git executable and the --git-dir parameter as list
2434 sub git_cmd {
2435         $number_of_git_cmds++;
2436         return $GIT, '--git-dir='.$git_dir;
2437 }
2438
2439 # quote the given arguments for passing them to the shell
2440 # quote_command("command", "arg 1", "arg with ' and ! characters")
2441 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2442 # Try to avoid using this function wherever possible.
2443 sub quote_command {
2444         return join(' ',
2445                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2446 }
2447
2448 # get HEAD ref of given project as hash
2449 sub git_get_head_hash {
2450         return git_get_full_hash(shift, 'HEAD');
2451 }
2452
2453 sub git_get_full_hash {
2454         return git_get_hash(@_);
2455 }
2456
2457 sub git_get_short_hash {
2458         return git_get_hash(@_, '--short=7');
2459 }
2460
2461 sub git_get_hash {
2462         my ($project, $hash, @options) = @_;
2463         my $o_git_dir = $git_dir;
2464         my $retval = undef;
2465         $git_dir = "$projectroot/$project";
2466         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2467             '--verify', '-q', @options, $hash) {
2468                 $retval = <$fd>;
2469                 chomp $retval if defined $retval;
2470                 close $fd;
2471         }
2472         if (defined $o_git_dir) {
2473                 $git_dir = $o_git_dir;
2474         }
2475         return $retval;
2476 }
2477
2478 # get type of given object
2479 sub git_get_type {
2480         my $hash = shift;
2481
2482         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2483         my $type = <$fd>;
2484         close $fd or return;
2485         chomp $type;
2486         return $type;
2487 }
2488
2489 # repository configuration
2490 our $config_file = '';
2491 our %config;
2492
2493 # store multiple values for single key as anonymous array reference
2494 # single values stored directly in the hash, not as [ <value> ]
2495 sub hash_set_multi {
2496         my ($hash, $key, $value) = @_;
2497
2498         if (!exists $hash->{$key}) {
2499                 $hash->{$key} = $value;
2500         } elsif (!ref $hash->{$key}) {
2501                 $hash->{$key} = [ $hash->{$key}, $value ];
2502         } else {
2503                 push @{$hash->{$key}}, $value;
2504         }
2505 }
2506
2507 # return hash of git project configuration
2508 # optionally limited to some section, e.g. 'gitweb'
2509 sub git_parse_project_config {
2510         my $section_regexp = shift;
2511         my %config;
2512
2513         local $/ = "\0";
2514
2515         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2516                 or return;
2517
2518         while (my $keyval = <$fh>) {
2519                 chomp $keyval;
2520                 my ($key, $value) = split(/\n/, $keyval, 2);
2521
2522                 hash_set_multi(\%config, $key, $value)
2523                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2524         }
2525         close $fh;
2526
2527         return %config;
2528 }
2529
2530 # convert config value to boolean: 'true' or 'false'
2531 # no value, number > 0, 'true' and 'yes' values are true
2532 # rest of values are treated as false (never as error)
2533 sub config_to_bool {
2534         my $val = shift;
2535
2536         return 1 if !defined $val;             # section.key
2537
2538         # strip leading and trailing whitespace
2539         $val =~ s/^\s+//;
2540         $val =~ s/\s+$//;
2541
2542         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2543                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2544 }
2545
2546 # convert config value to simple decimal number
2547 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2548 # to be multiplied by 1024, 1048576, or 1073741824
2549 sub config_to_int {
2550         my $val = shift;
2551
2552         # strip leading and trailing whitespace
2553         $val =~ s/^\s+//;
2554         $val =~ s/\s+$//;
2555
2556         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2557                 $unit = lc($unit);
2558                 # unknown unit is treated as 1
2559                 return $num * ($unit eq 'g' ? 1073741824 :
2560                                $unit eq 'm' ?    1048576 :
2561                                $unit eq 'k' ?       1024 : 1);
2562         }
2563         return $val;
2564 }
2565
2566 # convert config value to array reference, if needed
2567 sub config_to_multi {
2568         my $val = shift;
2569
2570         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2571 }
2572
2573 sub git_get_project_config {
2574         my ($key, $type) = @_;
2575
2576         return unless defined $git_dir;
2577
2578         # key sanity check
2579         return unless ($key);
2580         # only subsection, if exists, is case sensitive,
2581         # and not lowercased by 'git config -z -l'
2582         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2583                 $key = join(".", lc($hi), $mi, lc($lo));
2584         } else {
2585                 $key = lc($key);
2586         }
2587         $key =~ s/^gitweb\.//;
2588         return if ($key =~ m/\W/);
2589
2590         # type sanity check
2591         if (defined $type) {
2592                 $type =~ s/^--//;
2593                 $type = undef
2594                         unless ($type eq 'bool' || $type eq 'int');
2595         }
2596
2597         # get config
2598         if (!defined $config_file ||
2599             $config_file ne "$git_dir/config") {
2600                 %config = git_parse_project_config('gitweb');
2601                 $config_file = "$git_dir/config";
2602         }
2603
2604         # check if config variable (key) exists
2605         return unless exists $config{"gitweb.$key"};
2606
2607         # ensure given type
2608         if (!defined $type) {
2609                 return $config{"gitweb.$key"};
2610         } elsif ($type eq 'bool') {
2611                 # backward compatibility: 'git config --bool' returns true/false
2612                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2613         } elsif ($type eq 'int') {
2614                 return config_to_int($config{"gitweb.$key"});
2615         }
2616         return $config{"gitweb.$key"};
2617 }
2618
2619 # get hash of given path at given ref
2620 sub git_get_hash_by_path {
2621         my $base = shift;
2622         my $path = shift || return undef;
2623         my $type = shift;
2624
2625         $path =~ s,/+$,,;
2626
2627         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2628                 or die_error(500, "Open git-ls-tree failed");
2629         my $line = <$fd>;
2630         close $fd or return undef;
2631
2632         if (!defined $line) {
2633                 # there is no tree or hash given by $path at $base
2634                 return undef;
2635         }
2636
2637         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2638         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2639         if (defined $type && $type ne $2) {
2640                 # type doesn't match
2641                 return undef;
2642         }
2643         return $3;
2644 }
2645
2646 # get path of entry with given hash at given tree-ish (ref)
2647 # used to get 'from' filename for combined diff (merge commit) for renames
2648 sub git_get_path_by_hash {
2649         my $base = shift || return;
2650         my $hash = shift || return;
2651
2652         local $/ = "\0";
2653
2654         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2655                 or return undef;
2656         while (my $line = <$fd>) {
2657                 chomp $line;
2658
2659                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2660                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2661                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2662                         close $fd;
2663                         return $1;
2664                 }
2665         }
2666         close $fd;
2667         return undef;
2668 }
2669
2670 ## ......................................................................
2671 ## git utility functions, directly accessing git repository
2672
2673 # get the value of config variable either from file named as the variable
2674 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2675 # configuration variable in the repository config file.
2676 sub git_get_file_or_project_config {
2677         my ($path, $name) = @_;
2678
2679         $git_dir = "$projectroot/$path";
2680         open my $fd, '<', "$git_dir/$name"
2681                 or return git_get_project_config($name);
2682         my $conf = <$fd>;
2683         close $fd;
2684         if (defined $conf) {
2685                 chomp $conf;
2686         }
2687         return $conf;
2688 }
2689
2690 sub git_get_project_description {
2691         my $path = shift;
2692         return git_get_file_or_project_config($path, 'description');
2693 }
2694
2695 sub git_get_project_category {
2696         my $path = shift;
2697         return git_get_file_or_project_config($path, 'category');
2698 }
2699
2700
2701 # supported formats:
2702 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2703 #   - if its contents is a number, use it as tag weight,
2704 #   - otherwise add a tag with weight 1
2705 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2706 #   the same value multiple times increases tag weight
2707 # * `gitweb.ctag' multi-valued repo config variable
2708 sub git_get_project_ctags {
2709         my $project = shift;
2710         my $ctags = {};
2711
2712         $git_dir = "$projectroot/$project";
2713         if (opendir my $dh, "$git_dir/ctags") {
2714                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2715                 foreach my $tagfile (@files) {
2716                         open my $ct, '<', $tagfile
2717                                 or next;
2718                         my $val = <$ct>;
2719                         chomp $val if $val;
2720                         close $ct;
2721
2722                         (my $ctag = $tagfile) =~ s#.*/##;
2723                         if ($val =~ /^\d+$/) {
2724                                 $ctags->{$ctag} = $val;
2725                         } else {
2726                                 $ctags->{$ctag} = 1;
2727                         }
2728                 }
2729                 closedir $dh;
2730
2731         } elsif (open my $fh, '<', "$git_dir/ctags") {
2732                 while (my $line = <$fh>) {
2733                         chomp $line;
2734                         $ctags->{$line}++ if $line;
2735                 }
2736                 close $fh;
2737
2738         } else {
2739                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2740                 foreach my $tag (@$taglist) {
2741                         $ctags->{$tag}++;
2742                 }
2743         }
2744
2745         return $ctags;
2746 }
2747
2748 # return hash, where keys are content tags ('ctags'),
2749 # and values are sum of weights of given tag in every project
2750 sub git_gather_all_ctags {
2751         my $projects = shift;
2752         my $ctags = {};
2753
2754         foreach my $p (@$projects) {
2755                 foreach my $ct (keys %{$p->{'ctags'}}) {
2756                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2757                 }
2758         }
2759
2760         return $ctags;
2761 }
2762
2763 sub git_populate_project_tagcloud {
2764         my $ctags = shift;
2765
2766         # First, merge different-cased tags; tags vote on casing
2767         my %ctags_lc;
2768         foreach (keys %$ctags) {
2769                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2770                 if (not $ctags_lc{lc $_}->{topcount}
2771                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2772                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2773                         $ctags_lc{lc $_}->{topname} = $_;
2774                 }
2775         }
2776
2777         my $cloud;
2778         my $matched = $input_params{'ctag'};
2779         if (eval { require HTML::TagCloud; 1; }) {
2780                 $cloud = HTML::TagCloud->new;
2781                 foreach my $ctag (sort keys %ctags_lc) {
2782                         # Pad the title with spaces so that the cloud looks
2783                         # less crammed.
2784                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2785                         $title =~ s/ /&nbsp;/g;
2786                         $title =~ s/^/&nbsp;/g;
2787                         $title =~ s/$/&nbsp;/g;
2788                         if (defined $matched && $matched eq $ctag) {
2789                                 $title = qq(<span class="match">$title</span>);
2790                         }
2791                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2792                                     $ctags_lc{$ctag}->{count});
2793                 }
2794         } else {
2795                 $cloud = {};
2796                 foreach my $ctag (keys %ctags_lc) {
2797                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2798                         if (defined $matched && $matched eq $ctag) {
2799                                 $title = qq(<span class="match">$title</span>);
2800                         }
2801                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2802                         $cloud->{$ctag}{ctag} =
2803                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2804                 }
2805         }
2806         return $cloud;
2807 }
2808
2809 sub git_show_project_tagcloud {
2810         my ($cloud, $count) = @_;
2811         if (ref $cloud eq 'HTML::TagCloud') {
2812                 return $cloud->html_and_css($count);
2813         } else {
2814                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2815                 return
2816                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2817                         join (', ', map {
2818                                 $cloud->{$_}->{'ctag'}
2819                         } splice(@tags, 0, $count)) .
2820                         '</div>';
2821         }
2822 }
2823
2824 sub git_get_project_url_list {
2825         my $path = shift;
2826
2827         $git_dir = "$projectroot/$path";
2828         open my $fd, '<', "$git_dir/cloneurl"
2829                 or return wantarray ?
2830                 @{ config_to_multi(git_get_project_config('url')) } :
2831                    config_to_multi(git_get_project_config('url'));
2832         my @git_project_url_list = map { chomp; $_ } <$fd>;
2833         close $fd;
2834
2835         return wantarray ? @git_project_url_list : \@git_project_url_list;
2836 }
2837
2838 sub git_get_projects_list {
2839         my $filter = shift || '';
2840         my $paranoid = shift;
2841         my @list;
2842
2843         if (-d $projects_list) {
2844                 # search in directory
2845                 my $dir = $projects_list;
2846                 # remove the trailing "/"
2847                 $dir =~ s!/+$!!;
2848                 my $pfxlen = length("$dir");
2849                 my $pfxdepth = ($dir =~ tr!/!!);
2850                 # when filtering, search only given subdirectory
2851                 if ($filter && !$paranoid) {
2852                         $dir .= "/$filter";
2853                         $dir =~ s!/+$!!;
2854                 }
2855
2856                 File::Find::find({
2857                         follow_fast => 1, # follow symbolic links
2858                         follow_skip => 2, # ignore duplicates
2859                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2860                         wanted => sub {
2861                                 # global variables
2862                                 our $project_maxdepth;
2863                                 our $projectroot;
2864                                 # skip project-list toplevel, if we get it.
2865                                 return if (m!^[/.]$!);
2866                                 # only directories can be git repositories
2867                                 return unless (-d $_);
2868                                 # don't traverse too deep (Find is super slow on os x)
2869                                 # $project_maxdepth excludes depth of $projectroot
2870                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2871                                         $File::Find::prune = 1;
2872                                         return;
2873                                 }
2874
2875                                 my $path = substr($File::Find::name, $pfxlen + 1);
2876                                 # paranoidly only filter here
2877                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2878                                         next;
2879                                 }
2880                                 # we check related file in $projectroot
2881                                 if (check_export_ok("$projectroot/$path")) {
2882                                         push @list, { path => $path };
2883                                         $File::Find::prune = 1;
2884                                 }
2885                         },
2886                 }, "$dir");
2887
2888         } elsif (-f $projects_list) {
2889                 # read from file(url-encoded):
2890                 # 'git%2Fgit.git Linus+Torvalds'
2891                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2892                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2893                 open my $fd, '<', $projects_list or return;
2894         PROJECT:
2895                 while (my $line = <$fd>) {
2896                         chomp $line;
2897                         my ($path, $owner) = split ' ', $line;
2898                         $path = unescape($path);
2899                         $owner = unescape($owner);
2900                         if (!defined $path) {
2901                                 next;
2902                         }
2903                         # if $filter is rpovided, check if $path begins with $filter
2904                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2905                                 next;
2906                         }
2907                         if (check_export_ok("$projectroot/$path")) {
2908                                 my $pr = {
2909                                         path => $path,
2910                                         owner => to_utf8($owner),
2911                                 };
2912                                 push @list, $pr;
2913                         }
2914                 }
2915                 close $fd;
2916         }
2917         return @list;
2918 }
2919
2920 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2921 # as side effects it sets 'forks' field to list of forks for forked projects
2922 sub filter_forks_from_projects_list {
2923         my $projects = shift;
2924
2925         my %trie; # prefix tree of directories (path components)
2926         # generate trie out of those directories that might contain forks
2927         foreach my $pr (@$projects) {
2928                 my $path = $pr->{'path'};
2929                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2930                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2931                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2932                 next unless (-d "$projectroot/$path"); # containing directory exists
2933                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2934
2935                 # add to trie
2936                 my @dirs = split('/', $path);
2937                 # walk the trie, until either runs out of components or out of trie
2938                 my $ref = \%trie;
2939                 while (scalar @dirs &&
2940                        exists($ref->{$dirs[0]})) {
2941                         $ref = $ref->{shift @dirs};
2942                 }
2943                 # create rest of trie structure from rest of components
2944                 foreach my $dir (@dirs) {
2945                         $ref = $ref->{$dir} = {};
2946                 }
2947                 # create end marker, store $pr as a data
2948                 $ref->{''} = $pr if (!exists $ref->{''});
2949         }
2950
2951         # filter out forks, by finding shortest prefix match for paths
2952         my @filtered;
2953  PROJECT:
2954         foreach my $pr (@$projects) {
2955                 # trie lookup
2956                 my $ref = \%trie;
2957         DIR:
2958                 foreach my $dir (split('/', $pr->{'path'})) {
2959                         if (exists $ref->{''}) {
2960                                 # found [shortest] prefix, is a fork - skip it
2961                                 push @{$ref->{''}{'forks'}}, $pr;
2962                                 next PROJECT;
2963                         }
2964                         if (!exists $ref->{$dir}) {
2965                                 # not in trie, cannot have prefix, not a fork
2966                                 push @filtered, $pr;
2967                                 next PROJECT;
2968                         }
2969                         # If the dir is there, we just walk one step down the trie.
2970                         $ref = $ref->{$dir};
2971                 }
2972                 # we ran out of trie
2973                 # (shouldn't happen: it's either no match, or end marker)
2974                 push @filtered, $pr;
2975         }
2976
2977         return @filtered;
2978 }
2979
2980 # note: fill_project_list_info must be run first,
2981 # for 'descr_long' and 'ctags' to be filled
2982 sub search_projects_list {
2983         my ($projlist, %opts) = @_;
2984         my $tagfilter  = $opts{'tagfilter'};
2985         my $searchtext = $opts{'searchtext'};
2986
2987         return @$projlist
2988                 unless ($tagfilter || $searchtext);
2989
2990         my @projects;
2991  PROJECT:
2992         foreach my $pr (@$projlist) {
2993
2994                 if ($tagfilter) {
2995                         next unless ref($pr->{'ctags'}) eq 'HASH';
2996                         next unless
2997                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2998                 }
2999
3000                 if ($searchtext) {
3001                         next unless
3002                                 $pr->{'path'} =~ /$searchtext/ ||
3003                                 $pr->{'descr_long'} =~ /$searchtext/;
3004                 }
3005
3006                 push @projects, $pr;
3007         }
3008
3009         return @projects;
3010 }
3011
3012 our $gitweb_project_owner = undef;
3013 sub git_get_project_list_from_file {
3014
3015         return if (defined $gitweb_project_owner);
3016
3017         $gitweb_project_owner = {};
3018         # read from file (url-encoded):
3019         # 'git%2Fgit.git Linus+Torvalds'
3020         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3021         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3022         if (-f $projects_list) {
3023                 open(my $fd, '<', $projects_list);
3024                 while (my $line = <$fd>) {
3025                         chomp $line;
3026                         my ($pr, $ow) = split ' ', $line;
3027                         $pr = unescape($pr);
3028                         $ow = unescape($ow);
3029                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3030                 }
3031                 close $fd;
3032         }
3033 }
3034
3035 sub git_get_project_owner {
3036         my $project = shift;
3037         my $owner;
3038
3039         return undef unless $project;
3040         $git_dir = "$projectroot/$project";
3041
3042         if (!defined $gitweb_project_owner) {
3043                 git_get_project_list_from_file();
3044         }
3045
3046         if (exists $gitweb_project_owner->{$project}) {
3047                 $owner = $gitweb_project_owner->{$project};
3048         }
3049         if (!defined $owner){
3050                 $owner = git_get_project_config('owner');
3051         }
3052         if (!defined $owner) {
3053                 $owner = get_file_owner("$git_dir");
3054         }
3055
3056         return $owner;
3057 }
3058
3059 sub git_get_last_activity {
3060         my ($path) = @_;
3061         my $fd;
3062
3063         $git_dir = "$projectroot/$path";
3064         open($fd, "-|", git_cmd(), 'for-each-ref',
3065              '--format=%(committer)',
3066              '--sort=-committerdate',
3067              '--count=1',
3068              'refs/heads') or return;
3069         my $most_recent = <$fd>;
3070         close $fd or return;
3071         if (defined $most_recent &&
3072             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3073                 my $timestamp = $1;
3074                 my $age = time - $timestamp;
3075                 return ($age, age_string($age));
3076         }
3077         return (undef, undef);
3078 }
3079
3080 # Implementation note: when a single remote is wanted, we cannot use 'git
3081 # remote show -n' because that command always work (assuming it's a remote URL
3082 # if it's not defined), and we cannot use 'git remote show' because that would
3083 # try to make a network roundtrip. So the only way to find if that particular
3084 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3085 # and when we find what we want.
3086 sub git_get_remotes_list {
3087         my $wanted = shift;
3088         my %remotes = ();
3089
3090         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3091         return unless $fd;
3092         while (my $remote = <$fd>) {
3093                 chomp $remote;
3094                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3095                 next if $wanted and not $remote eq $wanted;
3096                 my ($url, $key) = ($1, $2);
3097
3098                 $remotes{$remote} ||= { 'heads' => () };
3099                 $remotes{$remote}{$key} = $url;
3100         }
3101         close $fd or return;
3102         return wantarray ? %remotes : \%remotes;
3103 }
3104
3105 # Takes a hash of remotes as first parameter and fills it by adding the
3106 # available remote heads for each of the indicated remotes.
3107 sub fill_remote_heads {
3108         my $remotes = shift;
3109         my @heads = map { "remotes/$_" } keys %$remotes;
3110         my @remoteheads = git_get_heads_list(undef, @heads);
3111         foreach my $remote (keys %$remotes) {
3112                 $remotes->{$remote}{'heads'} = [ grep {
3113                         $_->{'name'} =~ s!^$remote/!!
3114                         } @remoteheads ];
3115         }
3116 }
3117
3118 sub git_get_references {
3119         my $type = shift || "";
3120         my %refs;
3121         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3122         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3123         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3124                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3125                 or return;
3126
3127         while (my $line = <$fd>) {
3128                 chomp $line;
3129                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3130                         if (defined $refs{$1}) {
3131                                 push @{$refs{$1}}, $2;
3132                         } else {
3133                                 $refs{$1} = [ $2 ];
3134                         }
3135                 }
3136         }
3137         close $fd or return;
3138         return \%refs;
3139 }
3140
3141 sub git_get_rev_name_tags {
3142         my $hash = shift || return undef;
3143
3144         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3145                 or return;
3146         my $name_rev = <$fd>;
3147         close $fd;
3148
3149         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3150                 return $1;
3151         } else {
3152                 # catches also '$hash undefined' output
3153                 return undef;
3154         }
3155 }
3156
3157 ## ----------------------------------------------------------------------
3158 ## parse to hash functions
3159
3160 sub parse_date {
3161         my $epoch = shift;
3162         my $tz = shift || "-0000";
3163
3164         my %date;
3165         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3166         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3167         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3168         $date{'hour'} = $hour;
3169         $date{'minute'} = $min;
3170         $date{'mday'} = $mday;
3171         $date{'day'} = $days[$wday];
3172         $date{'month'} = $months[$mon];
3173         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3174                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3175         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3176                              $mday, $months[$mon], $hour ,$min;
3177         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3178                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3179
3180         my ($tz_sign, $tz_hour, $tz_min) =
3181                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3182         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3183         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3184         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3185         $date{'hour_local'} = $hour;
3186         $date{'minute_local'} = $min;
3187         $date{'tz_local'} = $tz;
3188         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3189                                   1900+$year, $mon+1, $mday,
3190                                   $hour, $min, $sec, $tz);
3191         return %date;
3192 }
3193
3194 sub parse_tag {
3195         my $tag_id = shift;
3196         my %tag;
3197         my @comment;
3198
3199         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3200         $tag{'id'} = $tag_id;
3201         while (my $line = <$fd>) {
3202                 chomp $line;
3203                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3204                         $tag{'object'} = $1;
3205                 } elsif ($line =~ m/^type (.+)$/) {
3206                         $tag{'type'} = $1;
3207                 } elsif ($line =~ m/^tag (.+)$/) {
3208                         $tag{'name'} = $1;
3209                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3210                         $tag{'author'} = $1;
3211                         $tag{'author_epoch'} = $2;
3212                         $tag{'author_tz'} = $3;
3213                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3214                                 $tag{'author_name'}  = $1;
3215                                 $tag{'author_email'} = $2;
3216                         } else {
3217                                 $tag{'author_name'} = $tag{'author'};
3218                         }
3219                 } elsif ($line =~ m/--BEGIN/) {
3220                         push @comment, $line;
3221                         last;
3222                 } elsif ($line eq "") {
3223                         last;
3224                 }
3225         }
3226         push @comment, <$fd>;
3227         $tag{'comment'} = \@comment;
3228         close $fd or return;
3229         if (!defined $tag{'name'}) {
3230                 return
3231         };
3232         return %tag
3233 }
3234
3235 sub parse_commit_text {
3236         my ($commit_text, $withparents) = @_;
3237         my @commit_lines = split '\n', $commit_text;
3238         my %co;
3239
3240         pop @commit_lines; # Remove '\0'
3241
3242         if (! @commit_lines) {
3243                 return;
3244         }
3245
3246         my $header = shift @commit_lines;
3247         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3248                 return;
3249         }
3250         ($co{'id'}, my @parents) = split ' ', $header;
3251         while (my $line = shift @commit_lines) {
3252                 last if $line eq "\n";
3253                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3254                         $co{'tree'} = $1;
3255                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3256                         push @parents, $1;
3257                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3258                         $co{'author'} = to_utf8($1);
3259                         $co{'author_epoch'} = $2;
3260                         $co{'author_tz'} = $3;
3261                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3262                                 $co{'author_name'}  = $1;
3263                                 $co{'author_email'} = $2;
3264                         } else {
3265                                 $co{'author_name'} = $co{'author'};
3266                         }
3267                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3268                         $co{'committer'} = to_utf8($1);
3269                         $co{'committer_epoch'} = $2;
3270                         $co{'committer_tz'} = $3;
3271                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3272                                 $co{'committer_name'}  = $1;
3273                                 $co{'committer_email'} = $2;
3274                         } else {
3275                                 $co{'committer_name'} = $co{'committer'};
3276                         }
3277                 }
3278         }
3279         if (!defined $co{'tree'}) {
3280                 return;
3281         };
3282         $co{'parents'} = \@parents;
3283         $co{'parent'} = $parents[0];
3284
3285         foreach my $title (@commit_lines) {
3286                 $title =~ s/^    //;
3287                 if ($title ne "") {
3288                         $co{'title'} = chop_str($title, 80, 5);
3289                         # remove leading stuff of merges to make the interesting part visible
3290                         if (length($title) > 50) {
3291                                 $title =~ s/^Automatic //;
3292                                 $title =~ s/^merge (of|with) /Merge ... /i;
3293                                 if (length($title) > 50) {
3294                                         $title =~ s/(http|rsync):\/\///;
3295                                 }
3296                                 if (length($title) > 50) {
3297                                         $title =~ s/(master|www|rsync)\.//;
3298                                 }
3299                                 if (length($title) > 50) {
3300                                         $title =~ s/kernel.org:?//;
3301                                 }
3302                                 if (length($title) > 50) {
3303                                         $title =~ s/\/pub\/scm//;
3304                                 }
3305                         }
3306                         $co{'title_short'} = chop_str($title, 50, 5);
3307                         last;
3308                 }
3309         }
3310         if (! defined $co{'title'} || $co{'title'} eq "") {
3311                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3312         }
3313         # remove added spaces
3314         foreach my $line (@commit_lines) {
3315                 $line =~ s/^    //;
3316         }
3317         $co{'comment'} = \@commit_lines;
3318
3319         my $age = time - $co{'committer_epoch'};
3320         $co{'age'} = $age;
3321         $co{'age_string'} = age_string($age);
3322         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3323         if ($age > 60*60*24*7*2) {
3324                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3325                 $co{'age_string_age'} = $co{'age_string'};
3326         } else {
3327                 $co{'age_string_date'} = $co{'age_string'};
3328                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3329         }
3330         return %co;
3331 }
3332
3333 sub parse_commit {
3334         my ($commit_id) = @_;
3335         my %co;
3336
3337         local $/ = "\0";
3338
3339         open my $fd, "-|", git_cmd(), "rev-list",
3340                 "--parents",
3341                 "--header",
3342                 "--max-count=1",
3343                 $commit_id,
3344                 "--",
3345                 or die_error(500, "Open git-rev-list failed");
3346         %co = parse_commit_text(<$fd>, 1);
3347         close $fd;
3348
3349         return %co;
3350 }
3351
3352 sub parse_commits {
3353         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3354         my @cos;
3355
3356         $maxcount ||= 1;
3357         $skip ||= 0;
3358
3359         local $/ = "\0";
3360
3361         open my $fd, "-|", git_cmd(), "rev-list",
3362                 "--header",
3363                 @args,
3364                 ("--max-count=" . $maxcount),
3365                 ("--skip=" . $skip),
3366                 @extra_options,
3367                 $commit_id,
3368                 "--",
3369                 ($filename ? ($filename) : ())
3370                 or die_error(500, "Open git-rev-list failed");
3371         while (my $line = <$fd>) {
3372                 my %co = parse_commit_text($line);
3373                 push @cos, \%co;
3374         }
3375         close $fd;
3376
3377         return wantarray ? @cos : \@cos;
3378 }
3379
3380 # parse line of git-diff-tree "raw" output
3381 sub parse_difftree_raw_line {
3382         my $line = shift;
3383         my %res;
3384
3385         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3386         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3387         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3388                 $res{'from_mode'} = $1;
3389                 $res{'to_mode'} = $2;
3390                 $res{'from_id'} = $3;
3391                 $res{'to_id'} = $4;
3392                 $res{'status'} = $5;
3393                 $res{'similarity'} = $6;
3394                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3395                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3396                 } else {
3397                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3398                 }
3399         }
3400         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3401         # combined diff (for merge commit)
3402         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3403                 $res{'nparents'}  = length($1);
3404                 $res{'from_mode'} = [ split(' ', $2) ];
3405                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3406                 $res{'from_id'} = [ split(' ', $3) ];
3407                 $res{'to_id'} = pop @{$res{'from_id'}};
3408                 $res{'status'} = [ split('', $4) ];
3409                 $res{'to_file'} = unquote($5);
3410         }
3411         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3412         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3413                 $res{'commit'} = $1;
3414         }
3415
3416         return wantarray ? %res : \%res;
3417 }
3418
3419 # wrapper: return parsed line of git-diff-tree "raw" output
3420 # (the argument might be raw line, or parsed info)
3421 sub parsed_difftree_line {
3422         my $line_or_ref = shift;
3423
3424         if (ref($line_or_ref) eq "HASH") {
3425                 # pre-parsed (or generated by hand)
3426                 return $line_or_ref;
3427         } else {
3428                 return parse_difftree_raw_line($line_or_ref);
3429         }
3430 }
3431
3432 # parse line of git-ls-tree output
3433 sub parse_ls_tree_line {
3434         my $line = shift;
3435         my %opts = @_;
3436         my %res;
3437
3438         if ($opts{'-l'}) {
3439                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3440                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3441
3442                 $res{'mode'} = $1;
3443                 $res{'type'} = $2;
3444                 $res{'hash'} = $3;
3445                 $res{'size'} = $4;
3446                 if ($opts{'-z'}) {
3447                         $res{'name'} = $5;
3448                 } else {
3449                         $res{'name'} = unquote($5);
3450                 }
3451         } else {
3452                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3453                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3454
3455                 $res{'mode'} = $1;
3456                 $res{'type'} = $2;
3457                 $res{'hash'} = $3;
3458                 if ($opts{'-z'}) {
3459                         $res{'name'} = $4;
3460                 } else {
3461                         $res{'name'} = unquote($4);
3462                 }
3463         }
3464
3465         return wantarray ? %res : \%res;
3466 }
3467
3468 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3469 sub parse_from_to_diffinfo {
3470         my ($diffinfo, $from, $to, @parents) = @_;
3471
3472         if ($diffinfo->{'nparents'}) {
3473                 # combined diff
3474                 $from->{'file'} = [];
3475                 $from->{'href'} = [];
3476                 fill_from_file_info($diffinfo, @parents)
3477                         unless exists $diffinfo->{'from_file'};
3478                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3479                         $from->{'file'}[$i] =
3480                                 defined $diffinfo->{'from_file'}[$i] ?
3481                                         $diffinfo->{'from_file'}[$i] :
3482                                         $diffinfo->{'to_file'};
3483                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3484                                 $from->{'href'}[$i] = href(action=>"blob",
3485                                                            hash_base=>$parents[$i],
3486                                                            hash=>$diffinfo->{'from_id'}[$i],
3487                                                            file_name=>$from->{'file'}[$i]);
3488                         } else {
3489                                 $from->{'href'}[$i] = undef;
3490                         }
3491                 }
3492         } else {
3493                 # ordinary (not combined) diff
3494                 $from->{'file'} = $diffinfo->{'from_file'};
3495                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3496                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3497                                                hash=>$diffinfo->{'from_id'},
3498                                                file_name=>$from->{'file'});
3499                 } else {
3500                         delete $from->{'href'};
3501                 }
3502         }
3503
3504         $to->{'file'} = $diffinfo->{'to_file'};
3505         if (!is_deleted($diffinfo)) { # file exists in result
3506                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3507                                      hash=>$diffinfo->{'to_id'},
3508                                      file_name=>$to->{'file'});
3509         } else {
3510                 delete $to->{'href'};
3511         }
3512 }
3513
3514 ## ......................................................................
3515 ## parse to array of hashes functions
3516
3517 sub git_get_heads_list {
3518         my ($limit, @classes) = @_;
3519         @classes = ('heads') unless @classes;
3520         my @patterns = map { "refs/$_" } @classes;
3521         my @headslist;
3522
3523         open my $fd, '-|', git_cmd(), 'for-each-ref',
3524                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3525                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3526                 @patterns
3527                 or return;
3528         while (my $line = <$fd>) {
3529                 my %ref_item;
3530
3531                 chomp $line;
3532                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3533                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3534                 my ($committer, $epoch, $tz) =
3535                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3536                 $ref_item{'fullname'}  = $name;
3537                 $name =~ s!^refs/(?:head|remote)s/!!;
3538
3539                 $ref_item{'name'}  = $name;
3540                 $ref_item{'id'}    = $hash;
3541                 $ref_item{'title'} = $title || '(no commit message)';
3542                 $ref_item{'epoch'} = $epoch;
3543                 if ($epoch) {
3544                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3545                 } else {
3546                         $ref_item{'age'} = "unknown";
3547                 }
3548
3549                 push @headslist, \%ref_item;
3550         }
3551         close $fd;
3552
3553         return wantarray ? @headslist : \@headslist;
3554 }
3555
3556 sub git_get_tags_list {
3557         my $limit = shift;
3558         my @tagslist;
3559
3560         open my $fd, '-|', git_cmd(), 'for-each-ref',
3561                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3562                 '--format=%(objectname) %(objecttype) %(refname) '.
3563                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3564                 'refs/tags'
3565                 or return;
3566         while (my $line = <$fd>) {
3567                 my %ref_item;
3568
3569                 chomp $line;
3570                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3571                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3572                 my ($creator, $epoch, $tz) =
3573                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3574                 $ref_item{'fullname'} = $name;
3575                 $name =~ s!^refs/tags/!!;
3576
3577                 $ref_item{'type'} = $type;
3578                 $ref_item{'id'} = $id;
3579                 $ref_item{'name'} = $name;
3580                 if ($type eq "tag") {
3581                         $ref_item{'subject'} = $title;
3582                         $ref_item{'reftype'} = $reftype;
3583                         $ref_item{'refid'}   = $refid;
3584                 } else {
3585                         $ref_item{'reftype'} = $type;
3586                         $ref_item{'refid'}   = $id;
3587                 }
3588
3589                 if ($type eq "tag" || $type eq "commit") {
3590                         $ref_item{'epoch'} = $epoch;
3591                         if ($epoch) {
3592                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3593                         } else {
3594                                 $ref_item{'age'} = "unknown";
3595                         }
3596                 }
3597
3598                 push @tagslist, \%ref_item;
3599         }
3600         close $fd;
3601
3602         return wantarray ? @tagslist : \@tagslist;
3603 }
3604
3605 ## ----------------------------------------------------------------------
3606 ## filesystem-related functions
3607
3608 sub get_file_owner {
3609         my $path = shift;
3610
3611         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3612         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3613         if (!defined $gcos) {
3614                 return undef;
3615         }
3616         my $owner = $gcos;
3617         $owner =~ s/[,;].*$//;
3618         return to_utf8($owner);
3619 }
3620
3621 # assume that file exists
3622 sub insert_file {
3623         my $filename = shift;
3624
3625         open my $fd, '<', $filename;
3626         print map { to_utf8($_) } <$fd>;
3627         close $fd;
3628 }
3629
3630 ## ......................................................................
3631 ## mimetype related functions
3632
3633 sub mimetype_guess_file {
3634         my $filename = shift;
3635         my $mimemap = shift;
3636         -r $mimemap or return undef;
3637
3638         my %mimemap;
3639         open(my $mh, '<', $mimemap) or return undef;
3640         while (<$mh>) {
3641                 next if m/^#/; # skip comments
3642                 my ($mimetype, @exts) = split(/\s+/);
3643                 foreach my $ext (@exts) {
3644                         $mimemap{$ext} = $mimetype;
3645                 }
3646         }
3647         close($mh);
3648
3649         $filename =~ /\.([^.]*)$/;
3650         return $mimemap{$1};
3651 }
3652
3653 sub mimetype_guess {
3654         my $filename = shift;
3655         my $mime;
3656         $filename =~ /\./ or return undef;
3657
3658         if ($mimetypes_file) {
3659                 my $file = $mimetypes_file;
3660                 if ($file !~ m!^/!) { # if it is relative path
3661                         # it is relative to project
3662                         $file = "$projectroot/$project/$file";
3663                 }
3664                 $mime = mimetype_guess_file($filename, $file);
3665         }
3666         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3667         return $mime;
3668 }
3669
3670 sub blob_mimetype {
3671         my $fd = shift;
3672         my $filename = shift;
3673
3674         if ($filename) {
3675                 my $mime = mimetype_guess($filename);
3676                 $mime and return $mime;
3677         }
3678
3679         # just in case
3680         return $default_blob_plain_mimetype unless $fd;
3681
3682         if (-T $fd) {
3683                 return 'text/plain';
3684         } elsif (! $filename) {
3685                 return 'application/octet-stream';
3686         } elsif ($filename =~ m/\.png$/i) {
3687                 return 'image/png';
3688         } elsif ($filename =~ m/\.gif$/i) {
3689                 return 'image/gif';
3690         } elsif ($filename =~ m/\.jpe?g$/i) {
3691                 return 'image/jpeg';
3692         } else {
3693                 return 'application/octet-stream';
3694         }
3695 }
3696
3697 sub blob_contenttype {
3698         my ($fd, $file_name, $type) = @_;
3699
3700         $type ||= blob_mimetype($fd, $file_name);
3701         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3702                 $type .= "; charset=$default_text_plain_charset";
3703         }
3704
3705         return $type;
3706 }
3707
3708 # guess file syntax for syntax highlighting; return undef if no highlighting
3709 # the name of syntax can (in the future) depend on syntax highlighter used
3710 sub guess_file_syntax {
3711         my ($highlight, $mimetype, $file_name) = @_;
3712         return undef unless ($highlight && defined $file_name);
3713         my $basename = basename($file_name, '.in');
3714         return $highlight_basename{$basename}
3715                 if exists $highlight_basename{$basename};
3716
3717         $basename =~ /\.([^.]*)$/;
3718         my $ext = $1 or return undef;
3719         return $highlight_ext{$ext}
3720                 if exists $highlight_ext{$ext};
3721
3722         return undef;
3723 }
3724
3725 # run highlighter and return FD of its output,
3726 # or return original FD if no highlighting
3727 sub run_highlighter {
3728         my ($fd, $highlight, $syntax) = @_;
3729         return $fd unless ($highlight && defined $syntax);
3730
3731         close $fd;
3732         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3733                   quote_command($highlight_bin).
3734                   " --replace-tabs=8 --fragment --syntax $syntax |"
3735                 or die_error(500, "Couldn't open file or run syntax highlighter");
3736         return $fd;
3737 }
3738
3739 ## ======================================================================
3740 ## functions printing HTML: header, footer, error page
3741
3742 sub get_page_title {
3743         my $title = to_utf8($site_name);
3744
3745         unless (defined $project) {
3746                 if (defined $project_filter) {
3747                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3748                 }
3749                 return $title;
3750         }
3751         $title .= " - " . to_utf8($project);
3752
3753         return $title unless (defined $action);
3754         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3755
3756         return $title unless (defined $file_name);
3757         $title .= " - " . esc_path($file_name);
3758         if ($action eq "tree" && $file_name !~ m|/$|) {
3759                 $title .= "/";
3760         }
3761
3762         return $title;
3763 }
3764
3765 sub get_content_type_html {
3766         # require explicit support from the UA if we are to send the page as
3767         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3768         # we have to do this because MSIE sometimes globs '*/*', pretending to
3769         # support xhtml+xml but choking when it gets what it asked for.
3770         if (defined $cgi->http('HTTP_ACCEPT') &&
3771             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3772             $cgi->Accept('application/xhtml+xml') != 0) {
3773                 return 'application/xhtml+xml';
3774         } else {
3775                 return 'text/html';
3776         }
3777 }
3778
3779 sub print_feed_meta {
3780         if (defined $project) {
3781                 my %href_params = get_feed_info();
3782                 if (!exists $href_params{'-title'}) {
3783                         $href_params{'-title'} = 'log';
3784                 }
3785
3786                 foreach my $format (qw(RSS Atom)) {
3787                         my $type = lc($format);
3788                         my %link_attr = (
3789                                 '-rel' => 'alternate',
3790                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3791                                 '-type' => "application/$type+xml"
3792                         );
3793
3794                         $href_params{'action'} = $type;
3795                         $link_attr{'-href'} = href(%href_params);
3796                         print "<link ".
3797                               "rel=\"$link_attr{'-rel'}\" ".
3798                               "title=\"$link_attr{'-title'}\" ".
3799                               "href=\"$link_attr{'-href'}\" ".
3800                               "type=\"$link_attr{'-type'}\" ".
3801                               "/>\n";
3802
3803                         $href_params{'extra_options'} = '--no-merges';
3804                         $link_attr{'-href'} = href(%href_params);
3805                         $link_attr{'-title'} .= ' (no merges)';
3806                         print "<link ".
3807                               "rel=\"$link_attr{'-rel'}\" ".
3808                               "title=\"$link_attr{'-title'}\" ".
3809                               "href=\"$link_attr{'-href'}\" ".
3810                               "type=\"$link_attr{'-type'}\" ".
3811                               "/>\n";
3812                 }
3813
3814         } else {
3815                 printf('<link rel="alternate" title="%s projects list" '.
3816                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3817                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3818                 printf('<link rel="alternate" title="%s projects feeds" '.
3819                        'href="%s" type="text/x-opml" />'."\n",
3820                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3821         }
3822 }
3823
3824 sub print_header_links {
3825         my $status = shift;
3826
3827         # print out each stylesheet that exist, providing backwards capability
3828         # for those people who defined $stylesheet in a config file
3829         if (defined $stylesheet) {
3830                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3831         } else {
3832                 foreach my $stylesheet (@stylesheets) {
3833                         next unless $stylesheet;
3834                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3835                 }
3836         }
3837         print_feed_meta()
3838                 if ($status eq '200 OK');
3839         if (defined $favicon) {
3840                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3841         }
3842 }
3843
3844 sub print_nav_breadcrumbs_path {
3845         my $dirprefix = undef;
3846         while (my $part = shift) {
3847                 $dirprefix .= "/" if defined $dirprefix;
3848                 $dirprefix .= $part;
3849                 print $cgi->a({-href => href(project => undef,
3850                                              project_filter => $dirprefix,
3851                                              action => "project_list")},
3852                               esc_html($part)) . " / ";
3853         }
3854 }
3855
3856 sub print_nav_breadcrumbs {
3857         my %opts = @_;
3858
3859         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3860         if (defined $project) {
3861                 my @dirname = split '/', $project;
3862                 my $projectbasename = pop @dirname;
3863                 print_nav_breadcrumbs_path(@dirname);
3864                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3865                 if (defined $action) {
3866                         my $action_print = $action ;
3867                         if (defined $opts{-action_extra}) {
3868                                 $action_print = $cgi->a({-href => href(action=>$action)},
3869                                         $action);
3870                         }
3871                         print " / $action_print";
3872                 }
3873                 if (defined $opts{-action_extra}) {
3874                         print " / $opts{-action_extra}";
3875                 }
3876                 print "\n";
3877         } elsif (defined $project_filter) {
3878                 print_nav_breadcrumbs_path(split '/', $project_filter);
3879         }
3880 }
3881
3882 sub print_search_form {
3883         if (!defined $searchtext) {
3884                 $searchtext = "";
3885         }
3886         my $search_hash;
3887         if (defined $hash_base) {
3888                 $search_hash = $hash_base;
3889         } elsif (defined $hash) {
3890                 $search_hash = $hash;
3891         } else {
3892                 $search_hash = "HEAD";
3893         }
3894         my $action = $my_uri;
3895         my $use_pathinfo = gitweb_check_feature('pathinfo');
3896         if ($use_pathinfo) {
3897                 $action .= "/".esc_url($project);
3898         }
3899         print $cgi->startform(-method => "get", -action => $action) .
3900               "<div class=\"search\">\n" .
3901               (!$use_pathinfo &&
3902               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3903               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3904               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3905               $cgi->popup_menu(-name => 'st', -default => 'commit',
3906                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3907               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3908               " search:\n",
3909               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
3910               "<span title=\"Extended regular expression\">" .
3911               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3912                              -checked => $search_use_regexp) .
3913               "</span>" .
3914               "</div>" .
3915               $cgi->end_form() . "\n";
3916 }
3917
3918 sub git_header_html {
3919         my $status = shift || "200 OK";
3920         my $expires = shift;
3921         my %opts = @_;
3922
3923         my $title = get_page_title();
3924         my $content_type = get_content_type_html();
3925         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3926                            -status=> $status, -expires => $expires)
3927                 unless ($opts{'-no_http_header'});
3928         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3929         print <<EOF;
3930 <?xml version="1.0" encoding="utf-8"?>
3931 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3932 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3933 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3934 <!-- git core binaries version $git_version -->
3935 <head>
3936 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3937 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3938 <meta name="robots" content="index, nofollow"/>
3939 <title>$title</title>
3940 EOF
3941         # the stylesheet, favicon etc urls won't work correctly with path_info
3942         # unless we set the appropriate base URL
3943         if ($ENV{'PATH_INFO'}) {
3944                 print "<base href=\"".esc_url($base_url)."\" />\n";
3945         }
3946         print_header_links($status);
3947
3948         if (defined $site_html_head_string) {
3949                 print to_utf8($site_html_head_string);
3950         }
3951
3952         print "</head>\n" .
3953               "<body>\n";
3954
3955         if (defined $site_header && -f $site_header) {
3956                 insert_file($site_header);
3957         }
3958
3959         print "<div class=\"page_header\">\n";
3960         if (defined $logo) {
3961                 print $cgi->a({-href => esc_url($logo_url),
3962                                -title => $logo_label},
3963                               $cgi->img({-src => esc_url($logo),
3964                                          -width => 72, -height => 27,
3965                                          -alt => "git",
3966                                          -class => "logo"}));
3967         }
3968         print_nav_breadcrumbs(%opts);
3969         print "</div>\n";
3970
3971         my $have_search = gitweb_check_feature('search');
3972         if (defined $project && $have_search) {
3973                 print_search_form();
3974         }
3975 }
3976
3977 sub git_footer_html {
3978         my $feed_class = 'rss_logo';
3979
3980         print "<div class=\"page_footer\">\n";
3981         if (defined $project) {
3982                 my $descr = git_get_project_description($project);
3983                 if (defined $descr) {
3984                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3985                 }
3986
3987                 my %href_params = get_feed_info();
3988                 if (!%href_params) {
3989                         $feed_class .= ' generic';
3990                 }
3991                 $href_params{'-title'} ||= 'log';
3992
3993                 foreach my $format (qw(RSS Atom)) {
3994                         $href_params{'action'} = lc($format);
3995                         print $cgi->a({-href => href(%href_params),
3996                                       -title => "$href_params{'-title'} $format feed",
3997                                       -class => $feed_class}, $format)."\n";
3998                 }
3999
4000         } else {
4001                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4002                                              project_filter => $project_filter),
4003                               -class => $feed_class}, "OPML") . " ";
4004                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4005                                              project_filter => $project_filter),
4006                               -class => $feed_class}, "TXT") . "\n";
4007         }
4008         print "</div>\n"; # class="page_footer"
4009
4010         if (defined $t0 && gitweb_check_feature('timed')) {
4011                 print "<div id=\"generating_info\">\n";
4012                 print 'This page took '.
4013                       '<span id="generating_time" class="time_span">'.
4014                       tv_interval($t0, [ gettimeofday() ]).
4015                       ' seconds </span>'.
4016                       ' and '.
4017                       '<span id="generating_cmd">'.
4018                       $number_of_git_cmds.
4019                       '</span> git commands '.
4020                       " to generate.\n";
4021                 print "</div>\n"; # class="page_footer"
4022         }
4023
4024         if (defined $site_footer && -f $site_footer) {
4025                 insert_file($site_footer);
4026         }
4027
4028         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4029         if (defined $action &&
4030             $action eq 'blame_incremental') {
4031                 print qq!<script type="text/javascript">\n!.
4032                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4033                       qq!           "!. href() .qq!");\n!.
4034                       qq!</script>\n!;
4035         } else {
4036                 my ($jstimezone, $tz_cookie, $datetime_class) =
4037                         gitweb_get_feature('javascript-timezone');
4038
4039                 print qq!<script type="text/javascript">\n!.
4040                       qq!window.onload = function () {\n!;
4041                 if (gitweb_check_feature('javascript-actions')) {
4042                         print qq!       fixLinks();\n!;
4043                 }
4044                 if ($jstimezone && $tz_cookie && $datetime_class) {
4045                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4046                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4047                 }
4048                 print qq!};\n!.
4049                       qq!</script>\n!;
4050         }
4051
4052         print "</body>\n" .
4053               "</html>";
4054 }
4055
4056 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4057 # Example: die_error(404, 'Hash not found')
4058 # By convention, use the following status codes (as defined in RFC 2616):
4059 # 400: Invalid or missing CGI parameters, or
4060 #      requested object exists but has wrong type.
4061 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4062 #      this server or project.
4063 # 404: Requested object/revision/project doesn't exist.
4064 # 500: The server isn't configured properly, or
4065 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4066 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4067 # 503: The server is currently unavailable (because it is overloaded,
4068 #      or down for maintenance).  Generally, this is a temporary state.
4069 sub die_error {
4070         my $status = shift || 500;
4071         my $error = esc_html(shift) || "Internal Server Error";
4072         my $extra = shift;
4073         my %opts = @_;
4074
4075         my %http_responses = (
4076                 400 => '400 Bad Request',
4077                 403 => '403 Forbidden',
4078                 404 => '404 Not Found',
4079                 500 => '500 Internal Server Error',
4080                 503 => '503 Service Unavailable',
4081         );
4082         git_header_html($http_responses{$status}, undef, %opts);
4083         print <<EOF;
4084 <div class="page_body">
4085 <br /><br />
4086 $status - $error
4087 <br />
4088 EOF
4089         if (defined $extra) {
4090                 print "<hr />\n" .
4091                       "$extra\n";
4092         }
4093         print "</div>\n";
4094
4095         git_footer_html();
4096         goto DONE_GITWEB
4097                 unless ($opts{'-error_handler'});
4098 }
4099
4100 ## ----------------------------------------------------------------------
4101 ## functions printing or outputting HTML: navigation
4102
4103 sub git_print_page_nav {
4104         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4105         $extra = '' if !defined $extra; # pager or formats
4106
4107         my @navs = qw(summary shortlog log commit commitdiff tree);
4108         if ($suppress) {
4109                 @navs = grep { $_ ne $suppress } @navs;
4110         }
4111
4112         my %arg = map { $_ => {action=>$_} } @navs;
4113         if (defined $head) {
4114                 for (qw(commit commitdiff)) {
4115                         $arg{$_}{'hash'} = $head;
4116                 }
4117                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4118                         for (qw(shortlog log)) {
4119                                 $arg{$_}{'hash'} = $head;
4120                         }
4121                 }
4122         }
4123
4124         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4125         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4126
4127         my @actions = gitweb_get_feature('actions');
4128         my %repl = (
4129                 '%' => '%',
4130                 'n' => $project,         # project name
4131                 'f' => $git_dir,         # project path within filesystem
4132                 'h' => $treehead || '',  # current hash ('h' parameter)
4133                 'b' => $treebase || '',  # hash base ('hb' parameter)
4134         );
4135         while (@actions) {
4136                 my ($label, $link, $pos) = splice(@actions,0,3);
4137                 # insert
4138                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4139                 # munch munch
4140                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4141                 $arg{$label}{'_href'} = $link;
4142         }
4143
4144         print "<div class=\"page_nav\">\n" .
4145                 (join " | ",
4146                  map { $_ eq $current ?
4147                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4148                  } @navs);
4149         print "<br/>\n$extra<br/>\n" .
4150               "</div>\n";
4151 }
4152
4153 # returns a submenu for the nagivation of the refs views (tags, heads,
4154 # remotes) with the current view disabled and the remotes view only
4155 # available if the feature is enabled
4156 sub format_ref_views {
4157         my ($current) = @_;
4158         my @ref_views = qw{tags heads};
4159         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4160         return join " | ", map {
4161                 $_ eq $current ? $_ :
4162                 $cgi->a({-href => href(action=>$_)}, $_)
4163         } @ref_views
4164 }
4165
4166 sub format_paging_nav {
4167         my ($action, $page, $has_next_link) = @_;
4168         my $paging_nav;
4169
4170
4171         if ($page > 0) {
4172                 $paging_nav .=
4173                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4174                         " &sdot; " .
4175                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4176                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4177         } else {
4178                 $paging_nav .= "first &sdot; prev";
4179         }
4180
4181         if ($has_next_link) {
4182                 $paging_nav .= " &sdot; " .
4183                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4184                                  -accesskey => "n", -title => "Alt-n"}, "next");
4185         } else {
4186                 $paging_nav .= " &sdot; next";
4187         }
4188
4189         return $paging_nav;
4190 }
4191
4192 ## ......................................................................
4193 ## functions printing or outputting HTML: div
4194
4195 sub git_print_header_div {
4196         my ($action, $title, $hash, $hash_base) = @_;
4197         my %args = ();
4198
4199         $args{'action'} = $action;
4200         $args{'hash'} = $hash if $hash;
4201         $args{'hash_base'} = $hash_base if $hash_base;
4202
4203         print "<div class=\"header\">\n" .
4204               $cgi->a({-href => href(%args), -class => "title"},
4205               $title ? $title : $action) .
4206               "\n</div>\n";
4207 }
4208
4209 sub format_repo_url {
4210         my ($name, $url) = @_;
4211         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4212 }
4213
4214 # Group output by placing it in a DIV element and adding a header.
4215 # Options for start_div() can be provided by passing a hash reference as the
4216 # first parameter to the function.
4217 # Options to git_print_header_div() can be provided by passing an array
4218 # reference. This must follow the options to start_div if they are present.
4219 # The content can be a scalar, which is output as-is, a scalar reference, which
4220 # is output after html escaping, an IO handle passed either as *handle or
4221 # *handle{IO}, or a function reference. In the latter case all following
4222 # parameters will be taken as argument to the content function call.
4223 sub git_print_section {
4224         my ($div_args, $header_args, $content);
4225         my $arg = shift;
4226         if (ref($arg) eq 'HASH') {
4227                 $div_args = $arg;
4228                 $arg = shift;
4229         }
4230         if (ref($arg) eq 'ARRAY') {
4231                 $header_args = $arg;
4232                 $arg = shift;
4233         }
4234         $content = $arg;
4235
4236         print $cgi->start_div($div_args);
4237         git_print_header_div(@$header_args);
4238
4239         if (ref($content) eq 'CODE') {
4240                 $content->(@_);
4241         } elsif (ref($content) eq 'SCALAR') {
4242                 print esc_html($$content);
4243         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4244                 print <$content>;
4245         } elsif (!ref($content) && defined($content)) {
4246                 print $content;
4247         }
4248
4249         print $cgi->end_div;
4250 }
4251
4252 sub format_timestamp_html {
4253         my $date = shift;
4254         my $strtime = $date->{'rfc2822'};
4255
4256         my (undef, undef, $datetime_class) =
4257                 gitweb_get_feature('javascript-timezone');
4258         if ($datetime_class) {
4259                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4260         }
4261
4262         my $localtime_format = '(%02d:%02d %s)';
4263         if ($date->{'hour_local'} < 6) {
4264                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4265         }
4266         $strtime .= ' ' .
4267                     sprintf($localtime_format,
4268                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4269
4270         return $strtime;
4271 }
4272
4273 # Outputs the author name and date in long form
4274 sub git_print_authorship {
4275         my $co = shift;
4276         my %opts = @_;
4277         my $tag = $opts{-tag} || 'div';
4278         my $author = $co->{'author_name'};
4279
4280         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4281         print "<$tag class=\"author_date\">" .
4282               format_search_author($author, "author", esc_html($author)) .
4283               " [".format_timestamp_html(\%ad)."]".
4284               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4285               "</$tag>\n";
4286 }
4287
4288 # Outputs table rows containing the full author or committer information,
4289 # in the format expected for 'commit' view (& similar).
4290 # Parameters are a commit hash reference, followed by the list of people
4291 # to output information for. If the list is empty it defaults to both
4292 # author and committer.
4293 sub git_print_authorship_rows {
4294         my $co = shift;
4295         # too bad we can't use @people = @_ || ('author', 'committer')
4296         my @people = @_;
4297         @people = ('author', 'committer') unless @people;
4298         foreach my $who (@people) {
4299                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4300                 print "<tr><td>$who</td><td>" .
4301                       format_search_author($co->{"${who}_name"}, $who,
4302                                            esc_html($co->{"${who}_name"})) . " " .
4303                       format_search_author($co->{"${who}_email"}, $who,
4304                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4305                       "</td><td rowspan=\"2\">" .
4306                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4307                       "</td></tr>\n" .
4308                       "<tr>" .
4309                       "<td></td><td>" .
4310                       format_timestamp_html(\%wd) .
4311                       "</td>" .
4312                       "</tr>\n";
4313         }
4314 }
4315
4316 sub git_print_page_path {
4317         my $name = shift;
4318         my $type = shift;
4319         my $hb = shift;
4320
4321
4322         print "<div class=\"page_path\">";
4323         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4324                       -title => 'tree root'}, to_utf8("[$project]"));
4325         print " / ";
4326         if (defined $name) {
4327                 my @dirname = split '/', $name;
4328                 my $basename = pop @dirname;
4329                 my $fullname = '';
4330
4331                 foreach my $dir (@dirname) {
4332                         $fullname .= ($fullname ? '/' : '') . $dir;
4333                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4334                                                      hash_base=>$hb),
4335                                       -title => $fullname}, esc_path($dir));
4336                         print " / ";
4337                 }
4338                 if (defined $type && $type eq 'blob') {
4339                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4340                                                      hash_base=>$hb),
4341                                       -title => $name}, esc_path($basename));
4342                         print '&nbsp;&nbsp;&nbsp;&nbsp;
4343 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4344 <script>
4345 function toggleLineNumbers() {
4346         e = document.getElementById("lineNoStyle");
4347         e2 = document.getElementById("lineNoToggle");
4348         if (e2.innerHTML == "[Hide line numbers]") {
4349                 e.innerHTML = ".linenr { display:none; }";
4350                 e2.innerHTML = "[Show line numbers]";
4351         }
4352         else {
4353                 e.innerHTML = "";
4354                 e2.innerHTML = "[Hide line numbers]";
4355         }
4356 }
4357 var style = document.createElement("style");
4358 style.setAttribute("id", "lineNoStyle");
4359 document.getElementsByTagName("head")[0].appendChild(style);
4360 toggleLineNumbers();
4361 </script>
4362 ';
4363                 } elsif (defined $type && $type eq 'tree') {
4364                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4365                                                      hash_base=>$hb),
4366                                       -title => $name}, esc_path($basename));
4367                         print " / ";
4368                 } else {
4369                         print esc_path($basename);
4370                 }
4371         }
4372         print "<br/></div>\n";
4373 }
4374
4375 sub git_print_log {
4376         my $log = shift;
4377         my %opts = @_;
4378
4379         if ($opts{'-remove_title'}) {
4380                 # remove title, i.e. first line of log
4381                 shift @$log;
4382         }
4383         # remove leading empty lines
4384         while (defined $log->[0] && $log->[0] eq "") {
4385                 shift @$log;
4386         }
4387
4388         # print log
4389         my $signoff = 0;
4390         my $empty = 0;
4391         foreach my $line (@$log) {
4392                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4393                         $signoff = 1;
4394                         $empty = 0;
4395                         if (! $opts{'-remove_signoff'}) {
4396                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4397                                 next;
4398                         } else {
4399                                 # remove signoff lines
4400                                 next;
4401                         }
4402                 } else {
4403                         $signoff = 0;
4404                 }
4405
4406                 # print only one empty line
4407                 # do not print empty line after signoff
4408                 if ($line eq "") {
4409                         next if ($empty || $signoff);
4410                         $empty = 1;
4411                 } else {
4412                         $empty = 0;
4413                 }
4414
4415                 print format_log_line_html($line) . "<br/>\n";
4416         }
4417
4418         if ($opts{'-final_empty_line'}) {
4419                 # end with single empty line
4420                 print "<br/>\n" unless $empty;
4421         }
4422 }
4423
4424 # return link target (what link points to)
4425 sub git_get_link_target {
4426         my $hash = shift;
4427         my $link_target;
4428
4429         # read link
4430         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4431                 or return;
4432         {
4433                 local $/ = undef;
4434                 $link_target = <$fd>;
4435         }
4436         close $fd
4437                 or return;
4438
4439         return $link_target;
4440 }
4441
4442 # given link target, and the directory (basedir) the link is in,
4443 # return target of link relative to top directory (top tree);
4444 # return undef if it is not possible (including absolute links).
4445 sub normalize_link_target {
4446         my ($link_target, $basedir) = @_;
4447
4448         # absolute symlinks (beginning with '/') cannot be normalized
4449         return if (substr($link_target, 0, 1) eq '/');
4450
4451         # normalize link target to path from top (root) tree (dir)
4452         my $path;
4453         if ($basedir) {
4454                 $path = $basedir . '/' . $link_target;
4455         } else {
4456                 # we are in top (root) tree (dir)
4457                 $path = $link_target;
4458         }
4459
4460         # remove //, /./, and /../
4461         my @path_parts;
4462         foreach my $part (split('/', $path)) {
4463                 # discard '.' and ''
4464                 next if (!$part || $part eq '.');
4465                 # handle '..'
4466                 if ($part eq '..') {
4467                         if (@path_parts) {
4468                                 pop @path_parts;
4469                         } else {
4470                                 # link leads outside repository (outside top dir)
4471                                 return;
4472                         }
4473                 } else {
4474                         push @path_parts, $part;
4475                 }
4476         }
4477         $path = join('/', @path_parts);
4478
4479         return $path;
4480 }
4481
4482 # print tree entry (row of git_tree), but without encompassing <tr> element
4483 sub git_print_tree_entry {
4484         my ($t, $basedir, $hash_base, $have_blame) = @_;
4485
4486         my %base_key = ();
4487         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4488
4489         # The format of a table row is: mode list link.  Where mode is
4490         # the mode of the entry, list is the name of the entry, an href,
4491         # and link is the action links of the entry.
4492
4493         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4494         if (exists $t->{'size'}) {
4495                 print "<td class=\"size\">$t->{'size'}</td>\n";
4496         }
4497         if ($t->{'type'} eq "blob") {
4498                 print "<td class=\"list\">" .
4499                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4500                                                file_name=>"$basedir$t->{'name'}", %base_key),
4501                                 -class => "list"}, esc_path($t->{'name'}));
4502                 if (S_ISLNK(oct $t->{'mode'})) {
4503                         my $link_target = git_get_link_target($t->{'hash'});
4504                         if ($link_target) {
4505                                 my $norm_target = normalize_link_target($link_target, $basedir);
4506                                 if (defined $norm_target) {
4507                                         print " -> " .
4508                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4509                                                                      file_name=>$norm_target),
4510                                                        -title => $norm_target}, esc_path($link_target));
4511                                 } else {
4512                                         print " -> " . esc_path($link_target);
4513                                 }
4514                         }
4515                 }
4516                 print "</td>\n";
4517                 print "<td class=\"link\">";
4518                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4519                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4520                               "blob");
4521                 if ($have_blame) {
4522                         print " | " .
4523                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4524                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4525                                       "blame");
4526                 }
4527                 if (defined $hash_base) {
4528                         print " | " .
4529                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4530                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4531                                       "history");
4532                 }
4533                 print " | " .
4534                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4535                                                file_name=>"$basedir$t->{'name'}")},
4536                                 "raw");
4537                 print "</td>\n";
4538
4539         } elsif ($t->{'type'} eq "tree") {
4540                 print "<td class=\"list\">";
4541                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4542                                              file_name=>"$basedir$t->{'name'}",
4543                                              %base_key)},
4544                               esc_path($t->{'name'}));
4545                 print "</td>\n";
4546                 print "<td class=\"link\">";
4547                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4548                                              file_name=>"$basedir$t->{'name'}",
4549                                              %base_key)},
4550                               "tree");
4551                 if (defined $hash_base) {
4552                         print " | " .
4553                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4554                                                      file_name=>"$basedir$t->{'name'}")},
4555                                       "history");
4556                 }
4557                 print "</td>\n";
4558         } else {
4559                 # unknown object: we can only present history for it
4560                 # (this includes 'commit' object, i.e. submodule support)
4561                 print "<td class=\"list\">" .
4562                       esc_path($t->{'name'}) .
4563                       "</td>\n";
4564                 print "<td class=\"link\">";
4565                 if (defined $hash_base) {
4566                         print $cgi->a({-href => href(action=>"history",
4567                                                      hash_base=>$hash_base,
4568                                                      file_name=>"$basedir$t->{'name'}")},
4569                                       "history");
4570                 }
4571                 print "</td>\n";
4572         }
4573 }
4574
4575 ## ......................................................................
4576 ## functions printing large fragments of HTML
4577
4578 # get pre-image filenames for merge (combined) diff
4579 sub fill_from_file_info {
4580         my ($diff, @parents) = @_;
4581
4582         $diff->{'from_file'} = [ ];
4583         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4584         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4585                 if ($diff->{'status'}[$i] eq 'R' ||
4586                     $diff->{'status'}[$i] eq 'C') {
4587                         $diff->{'from_file'}[$i] =
4588                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4589                 }
4590         }
4591
4592         return $diff;
4593 }
4594
4595 # is current raw difftree line of file deletion
4596 sub is_deleted {
4597         my $diffinfo = shift;
4598
4599         return $diffinfo->{'to_id'} eq ('0' x 40);
4600 }
4601
4602 # does patch correspond to [previous] difftree raw line
4603 # $diffinfo  - hashref of parsed raw diff format
4604 # $patchinfo - hashref of parsed patch diff format
4605 #              (the same keys as in $diffinfo)
4606 sub is_patch_split {
4607         my ($diffinfo, $patchinfo) = @_;
4608
4609         return defined $diffinfo && defined $patchinfo
4610                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4611 }
4612
4613
4614 sub git_difftree_body {
4615         my ($difftree, $hash, @parents) = @_;
4616         my ($parent) = $parents[0];
4617         my $have_blame = gitweb_check_feature('blame');
4618         print "<div class=\"list_head\">\n";
4619         if ($#{$difftree} > 10) {
4620                 print(($#{$difftree} + 1) . " files changed:\n");
4621         }
4622         print "</div>\n";
4623
4624         print "<table class=\"" .
4625               (@parents > 1 ? "combined " : "") .
4626               "diff_tree\">\n";
4627
4628         # header only for combined diff in 'commitdiff' view
4629         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4630         if ($has_header) {
4631                 # table header
4632                 print "<thead><tr>\n" .
4633                        "<th></th><th></th>\n"; # filename, patchN link
4634                 for (my $i = 0; $i < @parents; $i++) {
4635                         my $par = $parents[$i];
4636                         print "<th>" .
4637                               $cgi->a({-href => href(action=>"commitdiff",
4638                                                      hash=>$hash, hash_parent=>$par),
4639                                        -title => 'commitdiff to parent number ' .
4640                                                   ($i+1) . ': ' . substr($par,0,7)},
4641                                       $i+1) .
4642                               "&nbsp;</th>\n";
4643                 }
4644                 print "</tr></thead>\n<tbody>\n";
4645         }
4646
4647         my $alternate = 1;
4648         my $patchno = 0;
4649         foreach my $line (@{$difftree}) {
4650                 my $diff = parsed_difftree_line($line);
4651
4652                 if ($alternate) {
4653                         print "<tr class=\"dark\">\n";
4654                 } else {
4655                         print "<tr class=\"light\">\n";
4656                 }
4657                 $alternate ^= 1;
4658
4659                 if (exists $diff->{'nparents'}) { # combined diff
4660
4661                         fill_from_file_info($diff, @parents)
4662                                 unless exists $diff->{'from_file'};
4663
4664                         if (!is_deleted($diff)) {
4665                                 # file exists in the result (child) commit
4666                                 print "<td>" .
4667                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4668                                                              file_name=>$diff->{'to_file'},
4669                                                              hash_base=>$hash),
4670                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4671                                       "</td>\n";
4672                         } else {
4673                                 print "<td>" .
4674                                       esc_path($diff->{'to_file'}) .
4675                                       "</td>\n";
4676                         }
4677
4678                         if ($action eq 'commitdiff') {
4679                                 # link to patch
4680                                 $patchno++;
4681                                 print "<td class=\"link\">" .
4682                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4683                                               "patch") .
4684                                       " | " .
4685                                       "</td>\n";
4686                         }
4687
4688                         my $has_history = 0;
4689                         my $not_deleted = 0;
4690                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4691                                 my $hash_parent = $parents[$i];
4692                                 my $from_hash = $diff->{'from_id'}[$i];
4693                                 my $from_path = $diff->{'from_file'}[$i];
4694                                 my $status = $diff->{'status'}[$i];
4695
4696                                 $has_history ||= ($status ne 'A');
4697                                 $not_deleted ||= ($status ne 'D');
4698
4699                                 if ($status eq 'A') {
4700                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4701                                 } elsif ($status eq 'D') {
4702                                         print "<td class=\"link\">" .
4703                                               $cgi->a({-href => href(action=>"blob",
4704                                                                      hash_base=>$hash,
4705                                                                      hash=>$from_hash,
4706                                                                      file_name=>$from_path)},
4707                                                       "blob" . ($i+1)) .
4708                                               " | </td>\n";
4709                                 } else {
4710                                         if ($diff->{'to_id'} eq $from_hash) {
4711                                                 print "<td class=\"link nochange\">";
4712                                         } else {
4713                                                 print "<td class=\"link\">";
4714                                         }
4715                                         print $cgi->a({-href => href(action=>"blobdiff",
4716                                                                      hash=>$diff->{'to_id'},
4717                                                                      hash_parent=>$from_hash,
4718                                                                      hash_base=>$hash,
4719                                                                      hash_parent_base=>$hash_parent,
4720                                                                      file_name=>$diff->{'to_file'},
4721                                                                      file_parent=>$from_path)},
4722                                                       "diff" . ($i+1)) .
4723                                               " | </td>\n";
4724                                 }
4725                         }
4726
4727                         print "<td class=\"link\">";
4728                         if ($not_deleted) {
4729                                 print $cgi->a({-href => href(action=>"blob",
4730                                                              hash=>$diff->{'to_id'},
4731                                                              file_name=>$diff->{'to_file'},
4732                                                              hash_base=>$hash)},
4733                                               "blob");
4734                                 print " | " if ($has_history);
4735                         }
4736                         if ($has_history) {
4737                                 print $cgi->a({-href => href(action=>"history",
4738                                                              file_name=>$diff->{'to_file'},
4739                                                              hash_base=>$hash)},
4740                                               "history");
4741                         }
4742                         print "</td>\n";
4743
4744                         print "</tr>\n";
4745                         next; # instead of 'else' clause, to avoid extra indent
4746                 }
4747                 # else ordinary diff
4748
4749                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4750                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4751                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4752                         $to_mode_oct = oct $diff->{'to_mode'};
4753                         if (S_ISREG($to_mode_oct)) { # only for regular file
4754                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4755                         }
4756                         $to_file_type = file_type($diff->{'to_mode'});
4757                 }
4758                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4759                         $from_mode_oct = oct $diff->{'from_mode'};
4760                         if (S_ISREG($from_mode_oct)) { # only for regular file
4761                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4762                         }
4763                         $from_file_type = file_type($diff->{'from_mode'});
4764                 }
4765
4766                 if ($diff->{'status'} eq "A") { # created
4767                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4768                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4769                         $mode_chng   .= "]</span>";
4770                         print "<td>";
4771                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4772                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4773                                       -class => "list"}, esc_path($diff->{'file'}));
4774                         print "</td>\n";
4775                         print "<td>$mode_chng</td>\n";
4776                         print "<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                         }
4784                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4785                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4786                                       "blob");
4787                         print "</td>\n";
4788
4789                 } elsif ($diff->{'status'} eq "D") { # deleted
4790                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4791                         print "<td>";
4792                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4793                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4794                                        -class => "list"}, esc_path($diff->{'file'}));
4795                         print "</td>\n";
4796                         print "<td>$mode_chng</td>\n";
4797                         print "<td class=\"link\">";
4798                         if ($action eq 'commitdiff') {
4799                                 # link to patch
4800                                 $patchno++;
4801                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4802                                               "patch") .
4803                                       " | ";
4804                         }
4805                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4806                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4807                                       "blob") . " | ";
4808                         if ($have_blame) {
4809                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4810                                                              file_name=>$diff->{'file'})},
4811                                               "blame") . " | ";
4812                         }
4813                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4814                                                      file_name=>$diff->{'file'})},
4815                                       "history");
4816                         print "</td>\n";
4817
4818                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4819                         my $mode_chnge = "";
4820                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4821                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4822                                 if ($from_file_type ne $to_file_type) {
4823                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4824                                 }
4825                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4826                                         if ($from_mode_str && $to_mode_str) {
4827                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4828                                         } elsif ($to_mode_str) {
4829                                                 $mode_chnge .= " mode: $to_mode_str";
4830                                         }
4831                                 }
4832                                 $mode_chnge .= "]</span>\n";
4833                         }
4834                         print "<td>";
4835                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4836                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4837                                       -class => "list"}, esc_path($diff->{'file'}));
4838                         print "</td>\n";
4839                         print "<td>$mode_chnge</td>\n";
4840                         print "<td class=\"link\">";
4841                         if ($action eq 'commitdiff') {
4842                                 # link to patch
4843                                 $patchno++;
4844                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4845                                               "patch") .
4846                                       " | ";
4847                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4848                                 # "commit" view and modified file (not onlu mode changed)
4849                                 print $cgi->a({-href => href(action=>"blobdiff",
4850                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4851                                                              hash_base=>$hash, hash_parent_base=>$parent,
4852                                                              file_name=>$diff->{'file'})},
4853                                               "diff") .
4854                                       " | ";
4855                         }
4856                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4857                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4858                                        "blob") . " | ";
4859                         if ($have_blame) {
4860                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4861                                                              file_name=>$diff->{'file'})},
4862                                               "blame") . " | ";
4863                         }
4864                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4865                                                      file_name=>$diff->{'file'})},
4866                                       "history");
4867                         print "</td>\n";
4868
4869                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4870                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4871                         my $nstatus = $status_name{$diff->{'status'}};
4872                         my $mode_chng = "";
4873                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4874                                 # mode also for directories, so we cannot use $to_mode_str
4875                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4876                         }
4877                         print "<td>" .
4878                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4879                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4880                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4881                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4882                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4883                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4884                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4885                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4886                               "<td class=\"link\">";
4887                         if ($action eq 'commitdiff') {
4888                                 # link to patch
4889                                 $patchno++;
4890                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4891                                               "patch") .
4892                                       " | ";
4893                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4894                                 # "commit" view and modified file (not only pure rename or copy)
4895                                 print $cgi->a({-href => href(action=>"blobdiff",
4896                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4897                                                              hash_base=>$hash, hash_parent_base=>$parent,
4898                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4899                                               "diff") .
4900                                       " | ";
4901                         }
4902                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4903                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4904                                       "blob") . " | ";
4905                         if ($have_blame) {
4906                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4907                                                              file_name=>$diff->{'to_file'})},
4908                                               "blame") . " | ";
4909                         }
4910                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4911                                                     file_name=>$diff->{'to_file'})},
4912                                       "history");
4913                         print "</td>\n";
4914
4915                 } # we should not encounter Unmerged (U) or Unknown (X) status
4916                 print "</tr>\n";
4917         }
4918         print "</tbody>" if $has_header;
4919         print "</table>\n";
4920 }
4921
4922 sub print_sidebyside_diff_chunk {
4923         my @chunk = @_;
4924         my (@ctx, @rem, @add);
4925
4926         return unless @chunk;
4927
4928         # incomplete last line might be among removed or added lines,
4929         # or both, or among context lines: find which
4930         for (my $i = 1; $i < @chunk; $i++) {
4931                 if ($chunk[$i][0] eq 'incomplete') {
4932                         $chunk[$i][0] = $chunk[$i-1][0];
4933                 }
4934         }
4935
4936         # guardian
4937         push @chunk, ["", ""];
4938
4939         foreach my $line_info (@chunk) {
4940                 my ($class, $line) = @$line_info;
4941
4942                 # print chunk headers
4943                 if ($class && $class eq 'chunk_header') {
4944                         print $line;
4945                         next;
4946                 }
4947
4948                 ## print from accumulator when type of class of lines change
4949                 # empty contents block on start rem/add block, or end of chunk
4950                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4951                         print join '',
4952                                 '<div class="chunk_block ctx">',
4953                                         '<div class="old">',
4954                                         @ctx,
4955                                         '</div>',
4956                                         '<div class="new">',
4957                                         @ctx,
4958                                         '</div>',
4959                                 '</div>';
4960                         @ctx = ();
4961                 }
4962                 # empty add/rem block on start context block, or end of chunk
4963                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4964                         if (!@add) {
4965                                 # pure removal
4966                                 print join '',
4967                                         '<div class="chunk_block rem">',
4968                                                 '<div class="old">',
4969                                                 @rem,
4970                                                 '</div>',
4971                                         '</div>';
4972                         } elsif (!@rem) {
4973                                 # pure addition
4974                                 print join '',
4975                                         '<div class="chunk_block add">',
4976                                                 '<div class="new">',
4977                                                 @add,
4978                                                 '</div>',
4979                                         '</div>';
4980                         } else {
4981                                 # assume that it is change
4982                                 print join '',
4983                                         '<div class="chunk_block chg">',
4984                                                 '<div class="old">',
4985                                                 @rem,
4986                                                 '</div>',
4987                                                 '<div class="new">',
4988                                                 @add,
4989                                                 '</div>',
4990                                         '</div>';
4991                         }
4992                         @rem = @add = ();
4993                 }
4994
4995                 ## adding lines to accumulator
4996                 # guardian value
4997                 last unless $line;
4998                 # rem, add or change
4999                 if ($class eq 'rem') {
5000                         push @rem, $line;
5001                 } elsif ($class eq 'add') {
5002                         push @add, $line;
5003                 }
5004                 # context line
5005                 if ($class eq 'ctx') {
5006                         push @ctx, $line;
5007                 }
5008         }
5009 }
5010
5011 sub git_patchset_body {
5012         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5013         my ($hash_parent) = $hash_parents[0];
5014
5015         my $is_combined = (@hash_parents > 1);
5016         my $patch_idx = 0;
5017         my $patch_number = 0;
5018         my $patch_line;
5019         my $diffinfo;
5020         my $to_name;
5021         my (%from, %to);
5022         my @chunk; # for side-by-side diff
5023
5024         print "<div class=\"patchset\">\n";
5025
5026         # skip to first patch
5027         while ($patch_line = <$fd>) {
5028                 chomp $patch_line;
5029
5030                 last if ($patch_line =~ m/^diff /);
5031         }
5032
5033  PATCH:
5034         while ($patch_line) {
5035
5036                 # parse "git diff" header line
5037                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5038                         # $1 is from_name, which we do not use
5039                         $to_name = unquote($2);
5040                         $to_name =~ s!^b/!!;
5041                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5042                         # $1 is 'cc' or 'combined', which we do not use
5043                         $to_name = unquote($2);
5044                 } else {
5045                         $to_name = undef;
5046                 }
5047
5048                 # check if current patch belong to current raw line
5049                 # and parse raw git-diff line if needed
5050                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5051                         # this is continuation of a split patch
5052                         print "<div class=\"patch cont\">\n";
5053                 } else {
5054                         # advance raw git-diff output if needed
5055                         $patch_idx++ if defined $diffinfo;
5056
5057                         # read and prepare patch information
5058                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5059
5060                         # compact combined diff output can have some patches skipped
5061                         # find which patch (using pathname of result) we are at now;
5062                         if ($is_combined) {
5063                                 while ($to_name ne $diffinfo->{'to_file'}) {
5064                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5065                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5066                                               "</div>\n";  # class="patch"
5067
5068                                         $patch_idx++;
5069                                         $patch_number++;
5070
5071                                         last if $patch_idx > $#$difftree;
5072                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5073                                 }
5074                         }
5075
5076                         # modifies %from, %to hashes
5077                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5078
5079                         # this is first patch for raw difftree line with $patch_idx index
5080                         # we index @$difftree array from 0, but number patches from 1
5081                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5082                 }
5083
5084                 # git diff header
5085                 #assert($patch_line =~ m/^diff /) if DEBUG;
5086                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5087                 $patch_number++;
5088                 # print "git diff" header
5089                 print format_git_diff_header_line($patch_line, $diffinfo,
5090                                                   \%from, \%to);
5091
5092                 # print extended diff header
5093                 print "<div class=\"diff extended_header\">\n";
5094         EXTENDED_HEADER:
5095                 while ($patch_line = <$fd>) {
5096                         chomp $patch_line;
5097
5098                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5099
5100                         print format_extended_diff_header_line($patch_line, $diffinfo,
5101                                                                \%from, \%to);
5102                 }
5103                 print "</div>\n"; # class="diff extended_header"
5104
5105                 # from-file/to-file diff header
5106                 if (! $patch_line) {
5107                         print "</div>\n"; # class="patch"
5108                         last PATCH;
5109                 }
5110                 next PATCH if ($patch_line =~ m/^diff /);
5111                 #assert($patch_line =~ m/^---/) if DEBUG;
5112
5113                 my $last_patch_line = $patch_line;
5114                 $patch_line = <$fd>;
5115                 chomp $patch_line;
5116                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5117
5118                 print format_diff_from_to_header($last_patch_line, $patch_line,
5119                                                  $diffinfo, \%from, \%to,
5120                                                  @hash_parents);
5121
5122                 # the patch itself
5123         LINE:
5124                 while ($patch_line = <$fd>) {
5125                         chomp $patch_line;
5126
5127                         next PATCH if ($patch_line =~ m/^diff /);
5128
5129                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5130                         my $diff_classes = "diff";
5131                         $diff_classes .= " $class" if ($class);
5132                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5133
5134                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5135                                 if ($class eq 'chunk_header') {
5136                                         print_sidebyside_diff_chunk(@chunk);
5137                                         @chunk = ( [ $class, $line ] );
5138                                 } else {
5139                                         push @chunk, [ $class, $line ];
5140                                 }
5141                         } else {
5142                                 # default 'inline' style and unknown styles
5143                                 print $line;
5144                         }
5145                 }
5146
5147         } continue {
5148                 if (@chunk) {
5149                         print_sidebyside_diff_chunk(@chunk);
5150                         @chunk = ();
5151                 }
5152                 print "</div>\n"; # class="patch"
5153         }
5154
5155         # for compact combined (--cc) format, with chunk and patch simplification
5156         # the patchset might be empty, but there might be unprocessed raw lines
5157         for (++$patch_idx if $patch_number > 0;
5158              $patch_idx < @$difftree;
5159              ++$patch_idx) {
5160                 # read and prepare patch information
5161                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5162
5163                 # generate anchor for "patch" links in difftree / whatchanged part
5164                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5165                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5166                       "</div>\n";  # class="patch"
5167
5168                 $patch_number++;
5169         }
5170
5171         if ($patch_number == 0) {
5172                 if (@hash_parents > 1) {
5173                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5174                 } else {
5175                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5176                 }
5177         }
5178
5179         print "</div>\n"; # class="patchset"
5180 }
5181
5182 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5183
5184 sub git_project_search_form {
5185         my ($searchtext, $search_use_regexp);
5186
5187         my $limit = '';
5188         if ($project_filter) {
5189                 $limit = " in '$project_filter/'";
5190         }
5191
5192         print "<div class=\"projsearch\">\n";
5193         print $cgi->startform(-method => 'get', -action => $my_uri) .
5194               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5195         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5196                 if (defined $project_filter);
5197         print $cgi->textfield(-name => 's', -value => $searchtext,
5198                               -title => "Search project by name and description$limit",
5199                               -size => 60) . "\n" .
5200               "<span title=\"Extended regular expression\">" .
5201               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5202                              -checked => $search_use_regexp) .
5203               "</span>\n" .
5204               $cgi->submit(-name => 'btnS', -value => 'Search') .
5205               $cgi->end_form() . "\n" .
5206               $cgi->a({-href => href(project => undef, searchtext => undef,
5207                                      project_filter => $project_filter)},
5208                       esc_html("List all projects$limit")) . "<br />\n";
5209         print "</div>\n";
5210 }
5211
5212 # fills project list info (age, description, owner, category, forks)
5213 # for each project in the list, removing invalid projects from
5214 # returned list
5215 # NOTE: modifies $projlist, but does not remove entries from it
5216 sub fill_project_list_info {
5217         my $projlist = shift;
5218         my @projects;
5219
5220         my $show_ctags = gitweb_check_feature('ctags');
5221  PROJECT:
5222         foreach my $pr (@$projlist) {
5223                 my (@activity) = git_get_last_activity($pr->{'path'});
5224                 unless (@activity) {
5225                         next PROJECT;
5226                 }
5227                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5228                 if (!defined $pr->{'descr'}) {
5229                         my $descr = git_get_project_description($pr->{'path'}) || "";
5230                         $descr = to_utf8($descr);
5231                         $pr->{'descr_long'} = $descr;
5232                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5233                 }
5234                 if (!defined $pr->{'owner'}) {
5235                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5236                 }
5237                 if ($show_ctags) {
5238                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5239                 }
5240                 if ($projects_list_group_categories && !defined $pr->{'category'}) {
5241                         my $cat = git_get_project_category($pr->{'path'}) ||
5242                                                            $project_list_default_category;
5243                         $pr->{'category'} = to_utf8($cat);
5244                 }
5245
5246                 push @projects, $pr;
5247         }
5248
5249         return @projects;
5250 }
5251
5252 sub sort_projects_list {
5253         my ($projlist, $order) = @_;
5254         my @projects;
5255
5256         my %order_info = (
5257                 project => { key => 'path', type => 'str' },
5258                 descr => { key => 'descr_long', type => 'str' },
5259                 owner => { key => 'owner', type => 'str' },
5260                 age => { key => 'age', type => 'num' }
5261         );
5262         my $oi = $order_info{$order};
5263         return @$projlist unless defined $oi;
5264         if ($oi->{'type'} eq 'str') {
5265                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5266         } else {
5267                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5268         }
5269
5270         return @projects;
5271 }
5272
5273 # returns a hash of categories, containing the list of project
5274 # belonging to each category
5275 sub build_projlist_by_category {
5276         my ($projlist, $from, $to) = @_;
5277         my %categories;
5278
5279         $from = 0 unless defined $from;
5280         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5281
5282         for (my $i = $from; $i <= $to; $i++) {
5283                 my $pr = $projlist->[$i];
5284                 push @{$categories{ $pr->{'category'} }}, $pr;
5285         }
5286
5287         return wantarray ? %categories : \%categories;
5288 }
5289
5290 # print 'sort by' <th> element, generating 'sort by $name' replay link
5291 # if that order is not selected
5292 sub print_sort_th {
5293         print format_sort_th(@_);
5294 }
5295
5296 sub format_sort_th {
5297         my ($name, $order, $header) = @_;
5298         my $sort_th = "";
5299         $header ||= ucfirst($name);
5300
5301         if ($order eq $name) {
5302                 $sort_th .= "<th>$header</th>\n";
5303         } else {
5304                 $sort_th .= "<th>" .
5305                             $cgi->a({-href => href(-replay=>1, order=>$name),
5306                                      -class => "header"}, $header) .
5307                             "</th>\n";
5308         }
5309
5310         return $sort_th;
5311 }
5312
5313 sub git_project_list_rows {
5314         my ($projlist, $from, $to, $check_forks) = @_;
5315
5316         $from = 0 unless defined $from;
5317         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5318
5319         my $alternate = 1;
5320         for (my $i = $from; $i <= $to; $i++) {
5321                 my $pr = $projlist->[$i];
5322
5323                 if ($alternate) {
5324                         print "<tr class=\"dark\">\n";
5325                 } else {
5326                         print "<tr class=\"light\">\n";
5327                 }
5328                 $alternate ^= 1;
5329
5330                 if ($check_forks) {
5331                         print "<td>";
5332                         if ($pr->{'forks'}) {
5333                                 my $nforks = scalar @{$pr->{'forks'}};
5334                                 if ($nforks > 0) {
5335                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5336                                                        -title => "$nforks forks"}, "+");
5337                                 } else {
5338                                         print $cgi->span({-title => "$nforks forks"}, "+");
5339                                 }
5340                         }
5341                         print "</td>\n";
5342                 }
5343                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5344                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5345                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5346                                         -class => "list", -title => $pr->{'descr_long'}},
5347                                         esc_html($pr->{'descr'})) . "</td>\n" .
5348                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5349                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5350                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5351                       "<td class=\"link\">" .
5352                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5353                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5354                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5355                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5356                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5357                       "</td>\n" .
5358                       "</tr>\n";
5359         }
5360 }
5361
5362 sub git_project_list_body {
5363         # actually uses global variable $project
5364         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5365         my @projects = @$projlist;
5366
5367         my $check_forks = gitweb_check_feature('forks');
5368         my $show_ctags  = gitweb_check_feature('ctags');
5369         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5370         $check_forks = undef
5371                 if ($tagfilter || $searchtext);
5372
5373         # filtering out forks before filling info allows to do less work
5374         @projects = filter_forks_from_projects_list(\@projects)
5375                 if ($check_forks);
5376         @projects = fill_project_list_info(\@projects);
5377         # searching projects require filling to be run before it
5378         @projects = search_projects_list(\@projects,
5379                                          'searchtext' => $searchtext,
5380                                          'tagfilter'  => $tagfilter)
5381                 if ($tagfilter || $searchtext);
5382
5383         $order ||= $default_projects_order;
5384         $from = 0 unless defined $from;
5385         $to = $#projects if (!defined $to || $#projects < $to);
5386
5387         # short circuit
5388         if ($from > $to) {
5389                 print "<center>\n".
5390                       "<b>No such projects found</b><br />\n".
5391                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5392                       "</center>\n<br />\n";
5393                 return;
5394         }
5395
5396         @projects = sort_projects_list(\@projects, $order);
5397
5398         if ($show_ctags) {
5399                 my $ctags = git_gather_all_ctags(\@projects);
5400                 my $cloud = git_populate_project_tagcloud($ctags);
5401                 print git_show_project_tagcloud($cloud, 64);
5402         }
5403
5404         print "<table class=\"project_list\">\n";
5405         unless ($no_header) {
5406                 print "<tr>\n";
5407                 if ($check_forks) {
5408                         print "<th></th>\n";
5409                 }
5410                 print_sort_th('project', $order, 'Project');
5411                 print_sort_th('descr', $order, 'Description');
5412                 print_sort_th('owner', $order, 'Owner');
5413                 print_sort_th('age', $order, 'Last Change');
5414                 print "<th></th>\n" . # for links
5415                       "</tr>\n";
5416         }
5417
5418         if ($projects_list_group_categories) {
5419                 # only display categories with projects in the $from-$to window
5420                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5421                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5422                 foreach my $cat (sort keys %categories) {
5423                         unless ($cat eq "") {
5424                                 print "<tr>\n";
5425                                 if ($check_forks) {
5426                                         print "<td></td>\n";
5427                                 }
5428                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5429                                 print "</tr>\n";
5430                         }
5431
5432                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5433                 }
5434         } else {
5435                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5436         }
5437
5438         if (defined $extra) {
5439                 print "<tr>\n";
5440                 if ($check_forks) {
5441                         print "<td></td>\n";
5442                 }
5443                 print "<td colspan=\"5\">$extra</td>\n" .
5444                       "</tr>\n";
5445         }
5446         print "</table>\n";
5447 }
5448
5449 sub git_log_body {
5450         # uses global variable $project
5451         my ($commitlist, $from, $to, $refs, $extra) = @_;
5452
5453         $from = 0 unless defined $from;
5454         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5455
5456         for (my $i = 0; $i <= $to; $i++) {
5457                 my %co = %{$commitlist->[$i]};
5458                 next if !%co;
5459                 my $commit = $co{'id'};
5460                 my $ref = format_ref_marker($refs, $commit);
5461                 git_print_header_div('commit',
5462                                "<span class=\"age\">$co{'age_string'}</span>" .
5463                                esc_html($co{'title'}) . $ref,
5464                                $commit);
5465                 print "<div class=\"title_text\">\n" .
5466                       "<div class=\"log_link\">\n" .
5467                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5468                       " | " .
5469                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5470                       " | " .
5471                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5472                       "<br/>\n" .
5473                       "</div>\n";
5474                       git_print_authorship(\%co, -tag => 'span');
5475                       print "<br/>\n</div>\n";
5476
5477                 print "<div class=\"log_body\">\n";
5478                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5479                 print "</div>\n";
5480         }
5481         if ($extra) {
5482                 print "<div class=\"page_nav\">\n";
5483                 print "$extra\n";
5484                 print "</div>\n";
5485         }
5486 }
5487
5488 sub git_shortlog_body {
5489         # uses global variable $project
5490         my ($commitlist, $from, $to, $refs, $extra) = @_;
5491
5492         $from = 0 unless defined $from;
5493         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5494
5495         print "<table class=\"shortlog\">\n";
5496         my $alternate = 1;
5497         for (my $i = $from; $i <= $to; $i++) {
5498                 my %co = %{$commitlist->[$i]};
5499                 my $commit = $co{'id'};
5500                 my $ref = format_ref_marker($refs, $commit);
5501                 if ($alternate) {
5502                         print "<tr class=\"dark\">\n";
5503                 } else {
5504                         print "<tr class=\"light\">\n";
5505                 }
5506                 $alternate ^= 1;
5507                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5508                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5509                       format_author_html('td', \%co, 10) . "<td>";
5510                 print format_subject_html($co{'title'}, $co{'title_short'},
5511                                           href(action=>"commit", hash=>$commit), $ref);
5512                 print "</td>\n" .
5513                       "<td class=\"link\">" .
5514                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5515                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5516                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5517                 my $snapshot_links = format_snapshot_links($commit);
5518                 if (defined $snapshot_links) {
5519                         print " | " . $snapshot_links;
5520                 }
5521                 print "</td>\n" .
5522                       "</tr>\n";
5523         }
5524         if (defined $extra) {
5525                 print "<tr>\n" .
5526                       "<td colspan=\"4\">$extra</td>\n" .
5527                       "</tr>\n";
5528         }
5529         print "</table>\n";
5530 }
5531
5532 sub git_history_body {
5533         # Warning: assumes constant type (blob or tree) during history
5534         my ($commitlist, $from, $to, $refs, $extra,
5535             $file_name, $file_hash, $ftype) = @_;
5536
5537         $from = 0 unless defined $from;
5538         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5539
5540         print "<table class=\"history\">\n";
5541         my $alternate = 1;
5542         for (my $i = $from; $i <= $to; $i++) {
5543                 my %co = %{$commitlist->[$i]};
5544                 if (!%co) {
5545                         next;
5546                 }
5547                 my $commit = $co{'id'};
5548
5549                 my $ref = format_ref_marker($refs, $commit);
5550
5551                 if ($alternate) {
5552                         print "<tr class=\"dark\">\n";
5553                 } else {
5554                         print "<tr class=\"light\">\n";
5555                 }
5556                 $alternate ^= 1;
5557                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5558         # shortlog:   format_author_html('td', \%co, 10)
5559                       format_author_html('td', \%co, 15, 3) . "<td>";
5560                 # originally git_history used chop_str($co{'title'}, 50)
5561                 print format_subject_html($co{'title'}, $co{'title_short'},
5562                                           href(action=>"commit", hash=>$commit), $ref);
5563                 print "</td>\n" .
5564                       "<td class=\"link\">" .
5565                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5566                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5567
5568                 if ($ftype eq 'blob') {
5569                         my $blob_current = $file_hash;
5570                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5571                         if (defined $blob_current && defined $blob_parent &&
5572                                         $blob_current ne $blob_parent) {
5573                                 print " | " .
5574                                         $cgi->a({-href => href(action=>"blobdiff",
5575                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5576                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5577                                                                file_name=>$file_name)},
5578                                                 "diff to current");
5579                         }
5580                 }
5581                 print "</td>\n" .
5582                       "</tr>\n";
5583         }
5584         if (defined $extra) {
5585                 print "<tr>\n" .
5586                       "<td colspan=\"4\">$extra</td>\n" .
5587                       "</tr>\n";
5588         }
5589         print "</table>\n";
5590 }
5591
5592 sub git_tags_body {
5593         # uses global variable $project
5594         my ($taglist, $from, $to, $extra) = @_;
5595         $from = 0 unless defined $from;
5596         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5597
5598         print "<table class=\"tags\">\n";
5599         my $alternate = 1;
5600         for (my $i = $from; $i <= $to; $i++) {
5601                 my $entry = $taglist->[$i];
5602                 my %tag = %$entry;
5603                 my $comment = $tag{'subject'};
5604                 my $comment_short;
5605                 if (defined $comment) {
5606                         $comment_short = chop_str($comment, 30, 5);
5607                 }
5608                 if ($alternate) {
5609                         print "<tr class=\"dark\">\n";
5610                 } else {
5611                         print "<tr class=\"light\">\n";
5612                 }
5613                 $alternate ^= 1;
5614                 if (defined $tag{'age'}) {
5615                         print "<td><i>$tag{'age'}</i></td>\n";
5616                 } else {
5617                         print "<td></td>\n";
5618                 }
5619                 print "<td>" .
5620                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5621                                -class => "list name"}, esc_html($tag{'name'})) .
5622                       "</td>\n" .
5623                       "<td>";
5624                 if (defined $comment) {
5625                         print format_subject_html($comment, $comment_short,
5626                                                   href(action=>"tag", hash=>$tag{'id'}));
5627                 }
5628                 print "</td>\n" .
5629                       "<td class=\"selflink\">";
5630                 if ($tag{'type'} eq "tag") {
5631                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5632                 } else {
5633                         print "&nbsp;";
5634                 }
5635                 print "</td>\n" .
5636                       "<td class=\"link\">" . " | " .
5637                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5638                 if ($tag{'reftype'} eq "commit") {
5639                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5640                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5641                 } elsif ($tag{'reftype'} eq "blob") {
5642                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5643                 }
5644                 print "</td>\n" .
5645                       "</tr>";
5646         }
5647         if (defined $extra) {
5648                 print "<tr>\n" .
5649                       "<td colspan=\"5\">$extra</td>\n" .
5650                       "</tr>\n";
5651         }
5652         print "</table>\n";
5653 }
5654
5655 sub git_heads_body {
5656         # uses global variable $project
5657         my ($headlist, $head, $from, $to, $extra) = @_;
5658         $from = 0 unless defined $from;
5659         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5660
5661         print "<table class=\"heads\">\n";
5662         my $alternate = 1;
5663         for (my $i = $from; $i <= $to; $i++) {
5664                 my $entry = $headlist->[$i];
5665                 my %ref = %$entry;
5666                 my $curr = $ref{'id'} eq $head;
5667                 if ($alternate) {
5668                         print "<tr class=\"dark\">\n";
5669                 } else {
5670                         print "<tr class=\"light\">\n";
5671                 }
5672                 $alternate ^= 1;
5673                 print "<td><i>$ref{'age'}</i></td>\n" .
5674                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5675                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5676                                -class => "list name"},esc_html($ref{'name'})) .
5677                       "</td>\n" .
5678                       "<td class=\"link\">" .
5679                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5680                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5681                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5682                       "</td>\n" .
5683                       "</tr>";
5684         }
5685         if (defined $extra) {
5686                 print "<tr>\n" .
5687                       "<td colspan=\"3\">$extra</td>\n" .
5688                       "</tr>\n";
5689         }
5690         print "</table>\n";
5691 }
5692
5693 # Display a single remote block
5694 sub git_remote_block {
5695         my ($remote, $rdata, $limit, $head) = @_;
5696
5697         my $heads = $rdata->{'heads'};
5698         my $fetch = $rdata->{'fetch'};
5699         my $push = $rdata->{'push'};
5700
5701         my $urls_table = "<table class=\"projects_list\">\n" ;
5702
5703         if (defined $fetch) {
5704                 if ($fetch eq $push) {
5705                         $urls_table .= format_repo_url("URL", $fetch);
5706                 } else {
5707                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5708                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5709                 }
5710         } elsif (defined $push) {
5711                 $urls_table .= format_repo_url("Push URL", $push);
5712         } else {
5713                 $urls_table .= format_repo_url("", "No remote URL");
5714         }
5715
5716         $urls_table .= "</table>\n";
5717
5718         my $dots;
5719         if (defined $limit && $limit < @$heads) {
5720                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5721         }
5722
5723         print $urls_table;
5724         git_heads_body($heads, $head, 0, $limit, $dots);
5725 }
5726
5727 # Display a list of remote names with the respective fetch and push URLs
5728 sub git_remotes_list {
5729         my ($remotedata, $limit) = @_;
5730         print "<table class=\"heads\">\n";
5731         my $alternate = 1;
5732         my @remotes = sort keys %$remotedata;
5733
5734         my $limited = $limit && $limit < @remotes;
5735
5736         $#remotes = $limit - 1 if $limited;
5737
5738         while (my $remote = shift @remotes) {
5739                 my $rdata = $remotedata->{$remote};
5740                 my $fetch = $rdata->{'fetch'};
5741                 my $push = $rdata->{'push'};
5742                 if ($alternate) {
5743                         print "<tr class=\"dark\">\n";
5744                 } else {
5745                         print "<tr class=\"light\">\n";
5746                 }
5747                 $alternate ^= 1;
5748                 print "<td>" .
5749                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5750                                -class=> "list name"},esc_html($remote)) .
5751                       "</td>";
5752                 print "<td class=\"link\">" .
5753                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5754                       " | " .
5755                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5756                       "</td>";
5757
5758                 print "</tr>\n";
5759         }
5760
5761         if ($limited) {
5762                 print "<tr>\n" .
5763                       "<td colspan=\"3\">" .
5764                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5765                       "</td>\n" . "</tr>\n";
5766         }
5767
5768         print "</table>";
5769 }
5770
5771 # Display remote heads grouped by remote, unless there are too many
5772 # remotes, in which case we only display the remote names
5773 sub git_remotes_body {
5774         my ($remotedata, $limit, $head) = @_;
5775         if ($limit and $limit < keys %$remotedata) {
5776                 git_remotes_list($remotedata, $limit);
5777         } else {
5778                 fill_remote_heads($remotedata);
5779                 while (my ($remote, $rdata) = each %$remotedata) {
5780                         git_print_section({-class=>"remote", -id=>$remote},
5781                                 ["remotes", $remote, $remote], sub {
5782                                         git_remote_block($remote, $rdata, $limit, $head);
5783                                 });
5784                 }
5785         }
5786 }
5787
5788 sub git_search_message {
5789         my %co = @_;
5790
5791         my $greptype;
5792         if ($searchtype eq 'commit') {
5793                 $greptype = "--grep=";
5794         } elsif ($searchtype eq 'author') {
5795                 $greptype = "--author=";
5796         } elsif ($searchtype eq 'committer') {
5797                 $greptype = "--committer=";
5798         }
5799         $greptype .= $searchtext;
5800         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5801                                        $greptype, '--regexp-ignore-case',
5802                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5803
5804         my $paging_nav = '';
5805         if ($page > 0) {
5806                 $paging_nav .=
5807                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5808                                 "first") .
5809                         " &sdot; " .
5810                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5811                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5812         } else {
5813                 $paging_nav .= "first &sdot; prev";
5814         }
5815         my $next_link = '';
5816         if ($#commitlist >= 100) {
5817                 $next_link =
5818                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5819                                  -accesskey => "n", -title => "Alt-n"}, "next");
5820                 $paging_nav .= " &sdot; $next_link";
5821         } else {
5822                 $paging_nav .= " &sdot; next";
5823         }
5824
5825         git_header_html();
5826
5827         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5828         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5829         if ($page == 0 && !@commitlist) {
5830                 print "<p>No match.</p>\n";
5831         } else {
5832                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5833         }
5834
5835         git_footer_html();
5836 }
5837
5838 sub git_search_changes {
5839         my %co = @_;
5840
5841         local $/ = "\n";
5842         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5843                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5844                 ($search_use_regexp ? '--pickaxe-regex' : ())
5845                         or die_error(500, "Open git-log failed");
5846
5847         git_header_html();
5848
5849         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5850         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5851
5852         print "<table class=\"pickaxe search\">\n";
5853         my $alternate = 1;
5854         undef %co;
5855         my @files;
5856         while (my $line = <$fd>) {
5857                 chomp $line;
5858                 next unless $line;
5859
5860                 my %set = parse_difftree_raw_line($line);
5861                 if (defined $set{'commit'}) {
5862                         # finish previous commit
5863                         if (%co) {
5864                                 print "</td>\n" .
5865                                       "<td class=\"link\">" .
5866                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5867                                               "commit") .
5868                                       " | " .
5869                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5870                                                              hash_base=>$co{'id'})},
5871                                               "tree") .
5872                                       "</td>\n" .
5873                                       "</tr>\n";
5874                         }
5875
5876                         if ($alternate) {
5877                                 print "<tr class=\"dark\">\n";
5878                         } else {
5879                                 print "<tr class=\"light\">\n";
5880                         }
5881                         $alternate ^= 1;
5882                         %co = parse_commit($set{'commit'});
5883                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5884                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5885                               "<td><i>$author</i></td>\n" .
5886                               "<td>" .
5887                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5888                                       -class => "list subject"},
5889                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
5890                 } elsif (defined $set{'to_id'}) {
5891                         next if ($set{'to_id'} =~ m/^0{40}$/);
5892
5893                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5894                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5895                                       -class => "list"},
5896                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5897                               "<br/>\n";
5898                 }
5899         }
5900         close $fd;
5901
5902         # finish last commit (warning: repetition!)
5903         if (%co) {
5904                 print "</td>\n" .
5905                       "<td class=\"link\">" .
5906                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5907                               "commit") .
5908                       " | " .
5909                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5910                                              hash_base=>$co{'id'})},
5911                               "tree") .
5912                       "</td>\n" .
5913                       "</tr>\n";
5914         }
5915
5916         print "</table>\n";
5917
5918         git_footer_html();
5919 }
5920
5921 sub git_search_files {
5922         my %co = @_;
5923
5924         local $/ = "\n";
5925         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5926                 $search_use_regexp ? ('-E', '-i') : '-F',
5927                 $searchtext, $co{'tree'}
5928                         or die_error(500, "Open git-grep failed");
5929
5930         git_header_html();
5931
5932         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5933         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5934
5935         print "<table class=\"grep_search\">\n";
5936         my $alternate = 1;
5937         my $matches = 0;
5938         my $lastfile = '';
5939         while (my $line = <$fd>) {
5940                 chomp $line;
5941                 my ($file, $file_href, $lno, $ltext, $binary);
5942                 last if ($matches++ > 1000);
5943                 if ($line =~ /^Binary file (.+) matches$/) {
5944                         $file = $1;
5945                         $binary = 1;
5946                 } else {
5947                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
5948                         $file =~ s/^$co{'tree'}://;
5949                 }
5950                 if ($file ne $lastfile) {
5951                         $lastfile and print "</td></tr>\n";
5952                         if ($alternate++) {
5953                                 print "<tr class=\"dark\">\n";
5954                         } else {
5955                                 print "<tr class=\"light\">\n";
5956                         }
5957                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
5958                                           file_name=>$file);
5959                         print "<td class=\"list\">".
5960                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5961                         print "</td><td>\n";
5962                         $lastfile = $file;
5963                 }
5964                 if ($binary) {
5965                         print "<div class=\"binary\">Binary file</div>\n";
5966                 } else {
5967                         $ltext = untabify($ltext);
5968                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5969                                 $ltext = esc_html($1, -nbsp=>1);
5970                                 $ltext .= '<span class="match">';
5971                                 $ltext .= esc_html($2, -nbsp=>1);
5972                                 $ltext .= '</span>';
5973                                 $ltext .= esc_html($3, -nbsp=>1);
5974                         } else {
5975                                 $ltext = esc_html($ltext, -nbsp=>1);
5976                         }
5977                         print "<div class=\"pre\">" .
5978                                 $cgi->a({-href => $file_href.'#l'.$lno,
5979                                         -class => "linenr"}, sprintf('%4i', $lno)) .
5980                                 ' ' .  $ltext . "</div>\n";
5981                 }
5982         }
5983         if ($lastfile) {
5984                 print "</td></tr>\n";
5985                 if ($matches > 1000) {
5986                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5987                 }
5988         } else {
5989                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
5990         }
5991         close $fd;
5992
5993         print "</table>\n";
5994
5995         git_footer_html();
5996 }
5997
5998 sub git_search_grep_body {
5999         my ($commitlist, $from, $to, $extra) = @_;
6000         $from = 0 unless defined $from;
6001         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6002
6003         print "<table class=\"commit_search\">\n";
6004         my $alternate = 1;
6005         for (my $i = $from; $i <= $to; $i++) {
6006                 my %co = %{$commitlist->[$i]};
6007                 if (!%co) {
6008                         next;
6009                 }
6010                 my $commit = $co{'id'};
6011                 if ($alternate) {
6012                         print "<tr class=\"dark\">\n";
6013                 } else {
6014                         print "<tr class=\"light\">\n";
6015                 }
6016                 $alternate ^= 1;
6017                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6018                       format_author_html('td', \%co, 15, 5) .
6019                       "<td>" .
6020                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6021                                -class => "list subject"},
6022                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6023                 my $comment = $co{'comment'};
6024                 foreach my $line (@$comment) {
6025                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6026                                 my ($lead, $match, $trail) = ($1, $2, $3);
6027                                 $match = chop_str($match, 70, 5, 'center');
6028                                 my $contextlen = int((80 - length($match))/2);
6029                                 $contextlen = 30 if ($contextlen > 30);
6030                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6031                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6032
6033                                 $lead  = esc_html($lead);
6034                                 $match = esc_html($match);
6035                                 $trail = esc_html($trail);
6036
6037                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6038                         }
6039                 }
6040                 print "</td>\n" .
6041                       "<td class=\"link\">" .
6042                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6043                       " | " .
6044                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6045                       " | " .
6046                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6047                 print "</td>\n" .
6048                       "</tr>\n";
6049         }
6050         if (defined $extra) {
6051                 print "<tr>\n" .
6052                       "<td colspan=\"3\">$extra</td>\n" .
6053                       "</tr>\n";
6054         }
6055         print "</table>\n";
6056 }
6057
6058 ## ======================================================================
6059 ## ======================================================================
6060 ## actions
6061
6062 sub git_project_list {
6063         my $order = $input_params{'order'};
6064         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6065                 die_error(400, "Unknown order parameter");
6066         }
6067
6068         my @list = git_get_projects_list($project_filter, $strict_export);
6069         if (!@list) {
6070                 die_error(404, "No projects found");
6071         }
6072
6073         git_header_html();
6074         if (defined $home_text && -f $home_text) {
6075                 print "<div class=\"index_include\">\n";
6076                 insert_file($home_text);
6077                 print "</div>\n";
6078         }
6079
6080         git_project_search_form($searchtext, $search_use_regexp);
6081         git_project_list_body(\@list, $order);
6082         git_footer_html();
6083 }
6084
6085 sub git_forks {
6086         my $order = $input_params{'order'};
6087         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6088                 die_error(400, "Unknown order parameter");
6089         }
6090
6091         my $filter = $project;
6092         $filter =~ s/\.git$//;
6093         my @list = git_get_projects_list($filter);
6094         if (!@list) {
6095                 die_error(404, "No forks found");
6096         }
6097
6098         git_header_html();
6099         git_print_page_nav('','');
6100         git_print_header_div('summary', "$project forks");
6101         git_project_list_body(\@list, $order);
6102         git_footer_html();
6103 }
6104
6105 sub git_project_index {
6106         my @projects = git_get_projects_list($project_filter, $strict_export);
6107         if (!@projects) {
6108                 die_error(404, "No projects found");
6109         }
6110
6111         print $cgi->header(
6112                 -type => 'text/plain',
6113                 -charset => 'utf-8',
6114                 -content_disposition => 'inline; filename="index.aux"');
6115
6116         foreach my $pr (@projects) {
6117                 if (!exists $pr->{'owner'}) {
6118                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6119                 }
6120
6121                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6122                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6123                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6124                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6125                 $path  =~ s/ /\+/g;
6126                 $owner =~ s/ /\+/g;
6127
6128                 print "$path $owner\n";
6129         }
6130 }
6131
6132 sub git_summary {
6133         my $descr = git_get_project_description($project) || "none";
6134         my %co = parse_commit("HEAD");
6135         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6136         my $head = $co{'id'};
6137         my $remote_heads = gitweb_check_feature('remote_heads');
6138
6139         my $owner = git_get_project_owner($project);
6140
6141         my $refs = git_get_references();
6142         # These get_*_list functions return one more to allow us to see if
6143         # there are more ...
6144         my @taglist  = git_get_tags_list(16);
6145         my @headlist = git_get_heads_list(16);
6146         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6147         my @forklist;
6148         my $check_forks = gitweb_check_feature('forks');
6149
6150         if ($check_forks) {
6151                 # find forks of a project
6152                 my $filter = $project;
6153                 $filter =~ s/\.git$//;
6154                 @forklist = git_get_projects_list($filter);
6155                 # filter out forks of forks
6156                 @forklist = filter_forks_from_projects_list(\@forklist)
6157                         if (@forklist);
6158         }
6159
6160         git_header_html();
6161         git_print_page_nav('summary','', $head);
6162
6163         print "<div class=\"title\">&nbsp;</div>\n";
6164         print "<table class=\"projects_list\">\n" .
6165               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6166               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6167         if (defined $cd{'rfc2822'}) {
6168                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6169                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6170         }
6171
6172         # use per project git URL list in $projectroot/$project/cloneurl
6173         # or make project git URL from git base URL and project name
6174         my $url_tag = "URL";
6175         my @url_list = git_get_project_url_list($project);
6176         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6177         foreach my $git_url (@url_list) {
6178                 next unless $git_url;
6179                 print format_repo_url($url_tag, $git_url);
6180                 $url_tag = "";
6181         }
6182
6183         # Tag cloud
6184         my $show_ctags = gitweb_check_feature('ctags');
6185         if ($show_ctags) {
6186                 my $ctags = git_get_project_ctags($project);
6187                 if (%$ctags) {
6188                         # without ability to add tags, don't show if there are none
6189                         my $cloud = git_populate_project_tagcloud($ctags);
6190                         print "<tr id=\"metadata_ctags\">" .
6191                               "<td>content tags</td>" .
6192                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6193                               "</tr>\n";
6194                 }
6195         }
6196
6197         print "</table>\n";
6198
6199         # If XSS prevention is on, we don't include README.html.
6200         # TODO: Allow a readme in some safe format.
6201         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6202                 print "<div class=\"title\">readme</div>\n" .
6203                       "<div class=\"readme\">\n";
6204                 insert_file("$projectroot/$project/README.html");
6205                 print "\n</div>\n"; # class="readme"
6206         }
6207
6208         # we need to request one more than 16 (0..15) to check if
6209         # those 16 are all
6210         my @commitlist = $head ? parse_commits($head, 17) : ();
6211         if (@commitlist) {
6212                 git_print_header_div('shortlog');
6213                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6214                                   $#commitlist <=  15 ? undef :
6215                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6216         }
6217
6218         if (@taglist) {
6219                 git_print_header_div('tags');
6220                 git_tags_body(\@taglist, 0, 15,
6221                               $#taglist <=  15 ? undef :
6222                               $cgi->a({-href => href(action=>"tags")}, "..."));
6223         }
6224
6225         if (@headlist) {
6226                 git_print_header_div('heads');
6227                 git_heads_body(\@headlist, $head, 0, 15,
6228                                $#headlist <= 15 ? undef :
6229                                $cgi->a({-href => href(action=>"heads")}, "..."));
6230         }
6231
6232         if (%remotedata) {
6233                 git_print_header_div('remotes');
6234                 git_remotes_body(\%remotedata, 15, $head);
6235         }
6236
6237         if (@forklist) {
6238                 git_print_header_div('forks');
6239                 git_project_list_body(\@forklist, 'age', 0, 15,
6240                                       $#forklist <= 15 ? undef :
6241                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6242                                       'no_header');
6243         }
6244
6245         git_footer_html();
6246 }
6247
6248 sub git_tag {
6249         my %tag = parse_tag($hash);
6250
6251         if (! %tag) {
6252                 die_error(404, "Unknown tag object");
6253         }
6254
6255         my $head = git_get_head_hash($project);
6256         git_header_html();
6257         git_print_page_nav('','', $head,undef,$head);
6258         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6259         print "<div class=\"title_text\">\n" .
6260               "<table class=\"object_header\">\n" .
6261               "<tr>\n" .
6262               "<td>object</td>\n" .
6263               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6264                                $tag{'object'}) . "</td>\n" .
6265               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6266                                               $tag{'type'}) . "</td>\n" .
6267               "</tr>\n";
6268         if (defined($tag{'author'})) {
6269                 git_print_authorship_rows(\%tag, 'author');
6270         }
6271         print "</table>\n\n" .
6272               "</div>\n";
6273         print "<div class=\"page_body\">";
6274         my $comment = $tag{'comment'};
6275         foreach my $line (@$comment) {
6276                 chomp $line;
6277                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6278         }
6279         print "</div>\n";
6280         git_footer_html();
6281 }
6282
6283 sub git_blame_common {
6284         my $format = shift || 'porcelain';
6285         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6286                 $format = 'incremental';
6287                 $action = 'blame_incremental'; # for page title etc
6288         }
6289
6290         # permissions
6291         gitweb_check_feature('blame')
6292                 or die_error(403, "Blame view not allowed");
6293
6294         # error checking
6295         die_error(400, "No file name given") unless $file_name;
6296         $hash_base ||= git_get_head_hash($project);
6297         die_error(404, "Couldn't find base commit") unless $hash_base;
6298         my %co = parse_commit($hash_base)
6299                 or die_error(404, "Commit not found");
6300         my $ftype = "blob";
6301         if (!defined $hash) {
6302                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6303                         or die_error(404, "Error looking up file");
6304         } else {
6305                 $ftype = git_get_type($hash);
6306                 if ($ftype !~ "blob") {
6307                         die_error(400, "Object is not a blob");
6308                 }
6309         }
6310
6311         my $fd;
6312         if ($format eq 'incremental') {
6313                 # get file contents (as base)
6314                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6315                         or die_error(500, "Open git-cat-file failed");
6316         } elsif ($format eq 'data') {
6317                 # run git-blame --incremental
6318                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6319                         $hash_base, "--", $file_name
6320                         or die_error(500, "Open git-blame --incremental failed");
6321         } else {
6322                 # run git-blame --porcelain
6323                 open $fd, "-|", git_cmd(), "blame", '-p',
6324                         $hash_base, '--', $file_name
6325                         or die_error(500, "Open git-blame --porcelain failed");
6326         }
6327
6328         # incremental blame data returns early
6329         if ($format eq 'data') {
6330                 print $cgi->header(
6331                         -type=>"text/plain", -charset => "utf-8",
6332                         -status=> "200 OK");
6333                 local $| = 1; # output autoflush
6334                 while (my $line = <$fd>) {
6335                         print to_utf8($line);
6336                 }
6337                 close $fd
6338                         or print "ERROR $!\n";
6339
6340                 print 'END';
6341                 if (defined $t0 && gitweb_check_feature('timed')) {
6342                         print ' '.
6343                               tv_interval($t0, [ gettimeofday() ]).
6344                               ' '.$number_of_git_cmds;
6345                 }
6346                 print "\n";
6347
6348                 return;
6349         }
6350
6351         # page header
6352         git_header_html();
6353         my $formats_nav =
6354                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6355                         "blob") .
6356                 " | ";
6357         if ($format eq 'incremental') {
6358                 $formats_nav .=
6359                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6360                                 "blame") . " (non-incremental)";
6361         } else {
6362                 $formats_nav .=
6363                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6364                                 "blame") . " (incremental)";
6365         }
6366         $formats_nav .=
6367                 " | " .
6368                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6369                         "history") .
6370                 " | " .
6371                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6372                         "HEAD");
6373         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6374         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6375         git_print_page_path($file_name, $ftype, $hash_base);
6376
6377         # page body
6378         if ($format eq 'incremental') {
6379                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6380                       "This page requires JavaScript to run.\n Use ".
6381                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6382                               'this page').
6383                       " instead.\n".
6384                       "</b></center></div>\n</noscript>\n";
6385
6386                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6387         }
6388
6389         print qq!<div class="page_body">\n!;
6390         print qq!<div id="progress_info">... / ...</div>\n!
6391                 if ($format eq 'incremental');
6392         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6393               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6394               qq!<thead>\n!.
6395               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6396               qq!</thead>\n!.
6397               qq!<tbody>\n!;
6398
6399         my @rev_color = qw(light dark);
6400         my $num_colors = scalar(@rev_color);
6401         my $current_color = 0;
6402
6403         if ($format eq 'incremental') {
6404                 my $color_class = $rev_color[$current_color];
6405
6406                 #contents of a file
6407                 my $linenr = 0;
6408         LINE:
6409                 while (my $line = <$fd>) {
6410                         chomp $line;
6411                         $linenr++;
6412
6413                         print qq!<tr id="l$linenr" class="$color_class">!.
6414                               qq!<td class="sha1"><a href=""> </a></td>!.
6415                               qq!<td class="linenr">!.
6416                               qq!<a class="linenr" href="">$linenr</a></td>!;
6417                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6418                         print qq!</tr>\n!;
6419                 }
6420
6421         } else { # porcelain, i.e. ordinary blame
6422                 my %metainfo = (); # saves information about commits
6423
6424                 # blame data
6425         LINE:
6426                 while (my $line = <$fd>) {
6427                         chomp $line;
6428                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6429                         # no <lines in group> for subsequent lines in group of lines
6430                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6431                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6432                         if (!exists $metainfo{$full_rev}) {
6433                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6434                         }
6435                         my $meta = $metainfo{$full_rev};
6436                         my $data;
6437                         while ($data = <$fd>) {
6438                                 chomp $data;
6439                                 last if ($data =~ s/^\t//); # contents of line
6440                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6441                                         $meta->{$1} = $2 unless exists $meta->{$1};
6442                                 }
6443                                 if ($data =~ /^previous /) {
6444                                         $meta->{'nprevious'}++;
6445                                 }
6446                         }
6447                         my $short_rev = substr($full_rev, 0, 8);
6448                         my $author = $meta->{'author'};
6449                         my %date =
6450                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6451                         my $date = $date{'iso-tz'};
6452                         if ($group_size) {
6453                                 $current_color = ($current_color + 1) % $num_colors;
6454                         }
6455                         my $tr_class = $rev_color[$current_color];
6456                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6457                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6458                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6459                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6460                         if ($group_size) {
6461                                 print "<td class=\"sha1\"";
6462                                 print " title=\"". esc_html($author) . ", $date\"";
6463                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6464                                 print ">";
6465                                 print $cgi->a({-href => href(action=>"commit",
6466                                                              hash=>$full_rev,
6467                                                              file_name=>$file_name)},
6468                                               esc_html($short_rev));
6469                                 if ($group_size >= 2) {
6470                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6471                                         if (@author_initials) {
6472                                                 print "<br />" .
6473                                                       esc_html(join('', @author_initials));
6474                                                 #           or join('.', ...)
6475                                         }
6476                                 }
6477                                 print "</td>\n";
6478                         }
6479                         # 'previous' <sha1 of parent commit> <filename at commit>
6480                         if (exists $meta->{'previous'} &&
6481                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6482                                 $meta->{'parent'} = $1;
6483                                 $meta->{'file_parent'} = unquote($2);
6484                         }
6485                         my $linenr_commit =
6486                                 exists($meta->{'parent'}) ?
6487                                 $meta->{'parent'} : $full_rev;
6488                         my $linenr_filename =
6489                                 exists($meta->{'file_parent'}) ?
6490                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6491                         my $blamed = href(action => 'blame',
6492                                           file_name => $linenr_filename,
6493                                           hash_base => $linenr_commit);
6494                         print "<td class=\"linenr\">";
6495                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6496                                         -class => "linenr" },
6497                                       esc_html($lineno));
6498                         print "</td>";
6499                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6500                         print "</tr>\n";
6501                 } # end while
6502
6503         }
6504
6505         # footer
6506         print "</tbody>\n".
6507               "</table>\n"; # class="blame"
6508         print "</div>\n";   # class="blame_body"
6509         close $fd
6510                 or print "Reading blob failed\n";
6511
6512         git_footer_html();
6513 }
6514
6515 sub git_blame {
6516         git_blame_common();
6517 }
6518
6519 sub git_blame_incremental {
6520         git_blame_common('incremental');
6521 }
6522
6523 sub git_blame_data {
6524         git_blame_common('data');
6525 }
6526
6527 sub git_tags {
6528         my $head = git_get_head_hash($project);
6529         git_header_html();
6530         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6531         git_print_header_div('summary', $project);
6532
6533         my @tagslist = git_get_tags_list();
6534         if (@tagslist) {
6535                 git_tags_body(\@tagslist);
6536         }
6537         git_footer_html();
6538 }
6539
6540 sub git_heads {
6541         my $head = git_get_head_hash($project);
6542         git_header_html();
6543         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6544         git_print_header_div('summary', $project);
6545
6546         my @headslist = git_get_heads_list();
6547         if (@headslist) {
6548                 git_heads_body(\@headslist, $head);
6549         }
6550         git_footer_html();
6551 }
6552
6553 # used both for single remote view and for list of all the remotes
6554 sub git_remotes {
6555         gitweb_check_feature('remote_heads')
6556                 or die_error(403, "Remote heads view is disabled");
6557
6558         my $head = git_get_head_hash($project);
6559         my $remote = $input_params{'hash'};
6560
6561         my $remotedata = git_get_remotes_list($remote);
6562         die_error(500, "Unable to get remote information") unless defined $remotedata;
6563
6564         unless (%$remotedata) {
6565                 die_error(404, defined $remote ?
6566                         "Remote $remote not found" :
6567                         "No remotes found");
6568         }
6569
6570         git_header_html(undef, undef, -action_extra => $remote);
6571         git_print_page_nav('', '',  $head, undef, $head,
6572                 format_ref_views($remote ? '' : 'remotes'));
6573
6574         fill_remote_heads($remotedata);
6575         if (defined $remote) {
6576                 git_print_header_div('remotes', "$remote remote for $project");
6577                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6578         } else {
6579                 git_print_header_div('summary', "$project remotes");
6580                 git_remotes_body($remotedata, undef, $head);
6581         }
6582
6583         git_footer_html();
6584 }
6585
6586 sub git_blob_plain {
6587         my $type = shift;
6588         my $expires;
6589
6590         if (!defined $hash) {
6591                 if (defined $file_name) {
6592                         my $base = $hash_base || git_get_head_hash($project);
6593                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6594                                 or die_error(404, "Cannot find file");
6595                 } else {
6596                         die_error(400, "No file name defined");
6597                 }
6598         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6599                 # blobs defined by non-textual hash id's can be cached
6600                 $expires = "+1d";
6601         }
6602
6603         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6604                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6605
6606         # content-type (can include charset)
6607         $type = blob_contenttype($fd, $file_name, $type);
6608
6609         # "save as" filename, even when no $file_name is given
6610         my $save_as = "$hash";
6611         if (defined $file_name) {
6612                 $save_as = $file_name;
6613         } elsif ($type =~ m/^text\//) {
6614                 $save_as .= '.txt';
6615         }
6616
6617         # With XSS prevention on, blobs of all types except a few known safe
6618         # ones are served with "Content-Disposition: attachment" to make sure
6619         # they don't run in our security domain.  For certain image types,
6620         # blob view writes an <img> tag referring to blob_plain view, and we
6621         # want to be sure not to break that by serving the image as an
6622         # attachment (though Firefox 3 doesn't seem to care).
6623         my $sandbox = $prevent_xss &&
6624                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6625
6626         # serve text/* as text/plain
6627         if ($prevent_xss &&
6628             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6629              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6630                 my $rest = $1;
6631                 $rest = defined $rest ? $rest : '';
6632                 $type = "text/plain$rest";
6633         }
6634
6635         print $cgi->header(
6636                 -type => $type,
6637                 -expires => $expires,
6638                 -content_disposition =>
6639                         ($sandbox ? 'attachment' : 'inline')
6640                         . '; filename="' . $save_as . '"');
6641         local $/ = undef;
6642         binmode STDOUT, ':raw';
6643         print <$fd>;
6644         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6645         close $fd;
6646 }
6647
6648 sub git_blob {
6649         my $expires;
6650
6651         if (!defined $hash) {
6652                 if (defined $file_name) {
6653                         my $base = $hash_base || git_get_head_hash($project);
6654                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6655                                 or die_error(404, "Cannot find file");
6656                 } else {
6657                         die_error(400, "No file name defined");
6658                 }
6659         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6660                 # blobs defined by non-textual hash id's can be cached
6661                 $expires = "+1d";
6662         }
6663
6664         my $have_blame = gitweb_check_feature('blame');
6665         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6666                 or die_error(500, "Couldn't cat $file_name, $hash");
6667         my $mimetype = blob_mimetype($fd, $file_name);
6668         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6669         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6670                 close $fd;
6671                 return git_blob_plain($mimetype);
6672         }
6673         # we can have blame only for text/* mimetype
6674         $have_blame &&= ($mimetype =~ m!^text/!);
6675
6676         my $highlight = gitweb_check_feature('highlight');
6677         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6678         $fd = run_highlighter($fd, $highlight, $syntax)
6679                 if $syntax;
6680
6681         git_header_html(undef, $expires);
6682         my $formats_nav = '';
6683         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6684                 if (defined $file_name) {
6685                         if ($have_blame) {
6686                                 $formats_nav .=
6687                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6688                                                 "blame") .
6689                                         " | ";
6690                         }
6691                         $formats_nav .=
6692                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6693                                         "history") .
6694                                 " | " .
6695                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6696                                         "raw") .
6697                                 " | " .
6698                                 $cgi->a({-href => href(action=>"blob",
6699                                                        hash_base=>"HEAD", file_name=>$file_name)},
6700                                         "HEAD");
6701                 } else {
6702                         $formats_nav .=
6703                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6704                                         "raw");
6705                 }
6706                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6707                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6708         } else {
6709                 print "<div class=\"page_nav\">\n" .
6710                       "<br/><br/></div>\n" .
6711                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6712         }
6713         git_print_page_path($file_name, "blob", $hash_base);
6714         print "<div class=\"page_body\">\n";
6715         if ($mimetype =~ m!^image/!) {
6716                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6717                 if ($file_name) {
6718                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6719                 }
6720                 print qq! src="! .
6721                       href(action=>"blob_plain", hash=>$hash,
6722                            hash_base=>$hash_base, file_name=>$file_name) .
6723                       qq!" />\n!;
6724         } else {
6725                 my $nr;
6726                 while (my $line = <$fd>) {
6727                         chomp $line;
6728                         $nr++;
6729                         $line = untabify($line);
6730                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6731                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6732                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6733                 }
6734         }
6735         close $fd
6736                 or print "Reading blob failed.\n";
6737         print "</div>";
6738         git_footer_html();
6739 }
6740
6741 sub git_tree {
6742         if (!defined $hash_base) {
6743                 $hash_base = "HEAD";
6744         }
6745         if (!defined $hash) {
6746                 if (defined $file_name) {
6747                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6748                 } else {
6749                         $hash = $hash_base;
6750                 }
6751         }
6752         die_error(404, "No such tree") unless defined($hash);
6753
6754         my $show_sizes = gitweb_check_feature('show-sizes');
6755         my $have_blame = gitweb_check_feature('blame');
6756
6757         my @entries = ();
6758         {
6759                 local $/ = "\0";
6760                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6761                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6762                         or die_error(500, "Open git-ls-tree failed");
6763                 @entries = map { chomp; $_ } <$fd>;
6764                 close $fd
6765                         or die_error(404, "Reading tree failed");
6766         }
6767
6768         my $refs = git_get_references();
6769         my $ref = format_ref_marker($refs, $hash_base);
6770         git_header_html();
6771         my $basedir = '';
6772         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6773                 my @views_nav = ();
6774                 if (defined $file_name) {
6775                         push @views_nav,
6776                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6777                                         "history"),
6778                                 $cgi->a({-href => href(action=>"tree",
6779                                                        hash_base=>"HEAD", file_name=>$file_name)},
6780                                         "HEAD"),
6781                 }
6782                 my $snapshot_links = format_snapshot_links($hash);
6783                 if (defined $snapshot_links) {
6784                         # FIXME: Should be available when we have no hash base as well.
6785                         push @views_nav, $snapshot_links;
6786                 }
6787                 git_print_page_nav('tree','', $hash_base, undef, undef,
6788                                    join(' | ', @views_nav));
6789                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6790         } else {
6791                 undef $hash_base;
6792                 print "<div class=\"page_nav\">\n";
6793                 print "<br/><br/></div>\n";
6794                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6795         }
6796         if (defined $file_name) {
6797                 $basedir = $file_name;
6798                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6799                         $basedir .= '/';
6800                 }
6801                 git_print_page_path($file_name, 'tree', $hash_base);
6802         }
6803         print "<div class=\"page_body\">\n";
6804         print "<table class=\"tree\">\n";
6805         my $alternate = 1;
6806         # '..' (top directory) link if possible
6807         if (defined $hash_base &&
6808             defined $file_name && $file_name =~ m![^/]+$!) {
6809                 if ($alternate) {
6810                         print "<tr class=\"dark\">\n";
6811                 } else {
6812                         print "<tr class=\"light\">\n";
6813                 }
6814                 $alternate ^= 1;
6815
6816                 my $up = $file_name;
6817                 $up =~ s!/?[^/]+$!!;
6818                 undef $up unless $up;
6819                 # based on git_print_tree_entry
6820                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6821                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6822                 print '<td class="list">';
6823                 print $cgi->a({-href => href(action=>"tree",
6824                                              hash_base=>$hash_base,
6825                                              file_name=>$up)},
6826                               "..");
6827                 print "</td>\n";
6828                 print "<td class=\"link\"></td>\n";
6829
6830                 print "</tr>\n";
6831         }
6832         foreach my $line (@entries) {
6833                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6834
6835                 if ($alternate) {
6836                         print "<tr class=\"dark\">\n";
6837                 } else {
6838                         print "<tr class=\"light\">\n";
6839                 }
6840                 $alternate ^= 1;
6841
6842                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6843
6844                 print "</tr>\n";
6845         }
6846         print "</table>\n" .
6847               "</div>";
6848         git_footer_html();
6849 }
6850
6851 sub snapshot_name {
6852         my ($project, $hash) = @_;
6853
6854         # path/to/project.git  -> project
6855         # path/to/project/.git -> project
6856         my $name = to_utf8($project);
6857         $name =~ s,([^/])/*\.git$,$1,;
6858         $name = basename($name);
6859         # sanitize name
6860         $name =~ s/[[:cntrl:]]/?/g;
6861
6862         my $ver = $hash;
6863         if ($hash =~ /^[0-9a-fA-F]+$/) {
6864                 # shorten SHA-1 hash
6865                 my $full_hash = git_get_full_hash($project, $hash);
6866                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6867                         $ver = git_get_short_hash($project, $hash);
6868                 }
6869         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6870                 # tags don't need shortened SHA-1 hash
6871                 $ver = $1;
6872         } else {
6873                 # branches and other need shortened SHA-1 hash
6874                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6875                         $ver = $1;
6876                 }
6877                 $ver .= '-' . git_get_short_hash($project, $hash);
6878         }
6879         # in case of hierarchical branch names
6880         $ver =~ s!/!.!g;
6881
6882         # name = project-version_string
6883         $name = "$name-$ver";
6884
6885         return wantarray ? ($name, $name) : $name;
6886 }
6887
6888 sub git_snapshot {
6889         my $format = $input_params{'snapshot_format'};
6890         if (!@snapshot_fmts) {
6891                 die_error(403, "Snapshots not allowed");
6892         }
6893         # default to first supported snapshot format
6894         $format ||= $snapshot_fmts[0];
6895         if ($format !~ m/^[a-z0-9]+$/) {
6896                 die_error(400, "Invalid snapshot format parameter");
6897         } elsif (!exists($known_snapshot_formats{$format})) {
6898                 die_error(400, "Unknown snapshot format");
6899         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6900                 die_error(403, "Snapshot format not allowed");
6901         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6902                 die_error(403, "Unsupported snapshot format");
6903         }
6904
6905         my $type = git_get_type("$hash^{}");
6906         if (!$type) {
6907                 die_error(404, 'Object does not exist');
6908         }  elsif ($type eq 'blob') {
6909                 die_error(400, 'Object is not a tree-ish');
6910         }
6911
6912         my ($name, $prefix) = snapshot_name($project, $hash);
6913         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6914         my $cmd = quote_command(
6915                 git_cmd(), 'archive',
6916                 "--format=$known_snapshot_formats{$format}{'format'}",
6917                 "--prefix=$prefix/", $hash);
6918         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6919                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6920         }
6921
6922         $filename =~ s/(["\\])/\\$1/g;
6923         print $cgi->header(
6924                 -type => $known_snapshot_formats{$format}{'type'},
6925                 -content_disposition => 'inline; filename="' . $filename . '"',
6926                 -status => '200 OK');
6927
6928         open my $fd, "-|", $cmd
6929                 or die_error(500, "Execute git-archive failed");
6930         binmode STDOUT, ':raw';
6931         print <$fd>;
6932         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6933         close $fd;
6934 }
6935
6936 sub git_log_generic {
6937         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6938
6939         my $head = git_get_head_hash($project);
6940         if (!defined $base) {
6941                 $base = $head;
6942         }
6943         if (!defined $page) {
6944                 $page = 0;
6945         }
6946         my $refs = git_get_references();
6947
6948         my $commit_hash = $base;
6949         if (defined $parent) {
6950                 $commit_hash = "$parent..$base";
6951         }
6952         my @commitlist =
6953                 parse_commits($commit_hash, 101, (100 * $page),
6954                               defined $file_name ? ($file_name, "--full-history") : ());
6955
6956         my $ftype;
6957         if (!defined $file_hash && defined $file_name) {
6958                 # some commits could have deleted file in question,
6959                 # and not have it in tree, but one of them has to have it
6960                 for (my $i = 0; $i < @commitlist; $i++) {
6961                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6962                         last if defined $file_hash;
6963                 }
6964         }
6965         if (defined $file_hash) {
6966                 $ftype = git_get_type($file_hash);
6967         }
6968         if (defined $file_name && !defined $ftype) {
6969                 die_error(500, "Unknown type of object");
6970         }
6971         my %co;
6972         if (defined $file_name) {
6973                 %co = parse_commit($base)
6974                         or die_error(404, "Unknown commit object");
6975         }
6976
6977
6978         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6979         my $next_link = '';
6980         if ($#commitlist >= 100) {
6981                 $next_link =
6982                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6983                                  -accesskey => "n", -title => "Alt-n"}, "next");
6984         }
6985         my $patch_max = gitweb_get_feature('patches');
6986         if ($patch_max && !defined $file_name) {
6987                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6988                         $paging_nav .= " &sdot; " .
6989                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6990                                         "patches");
6991                 }
6992         }
6993
6994         git_header_html();
6995         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6996         if (defined $file_name) {
6997                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6998         } else {
6999                 git_print_header_div('summary', $project)
7000         }
7001         git_print_page_path($file_name, $ftype, $hash_base)
7002                 if (defined $file_name);
7003
7004         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7005                      $file_name, $file_hash, $ftype);
7006
7007         git_footer_html();
7008 }
7009
7010 sub git_log {
7011         git_log_generic('log', \&git_log_body,
7012                         $hash, $hash_parent);
7013 }
7014
7015 sub git_commit {
7016         $hash ||= $hash_base || "HEAD";
7017         my %co = parse_commit($hash)
7018             or die_error(404, "Unknown commit object");
7019
7020         my $parent  = $co{'parent'};
7021         my $parents = $co{'parents'}; # listref
7022
7023         # we need to prepare $formats_nav before any parameter munging
7024         my $formats_nav;
7025         if (!defined $parent) {
7026                 # --root commitdiff
7027                 $formats_nav .= '(initial)';
7028         } elsif (@$parents == 1) {
7029                 # single parent commit
7030                 $formats_nav .=
7031                         '(parent: ' .
7032                         $cgi->a({-href => href(action=>"commit",
7033                                                hash=>$parent)},
7034                                 esc_html(substr($parent, 0, 7))) .
7035                         ')';
7036         } else {
7037                 # merge commit
7038                 $formats_nav .=
7039                         '(merge: ' .
7040                         join(' ', map {
7041                                 $cgi->a({-href => href(action=>"commit",
7042                                                        hash=>$_)},
7043                                         esc_html(substr($_, 0, 7)));
7044                         } @$parents ) .
7045                         ')';
7046         }
7047         if (gitweb_check_feature('patches') && @$parents <= 1) {
7048                 $formats_nav .= " | " .
7049                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7050                                 "patch");
7051         }
7052
7053         if (!defined $parent) {
7054                 $parent = "--root";
7055         }
7056         my @difftree;
7057         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7058                 @diff_opts,
7059                 (@$parents <= 1 ? $parent : '-c'),
7060                 $hash, "--"
7061                 or die_error(500, "Open git-diff-tree failed");
7062         @difftree = map { chomp; $_ } <$fd>;
7063         close $fd or die_error(404, "Reading git-diff-tree failed");
7064
7065         # non-textual hash id's can be cached
7066         my $expires;
7067         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7068                 $expires = "+1d";
7069         }
7070         my $refs = git_get_references();
7071         my $ref = format_ref_marker($refs, $co{'id'});
7072
7073         git_header_html(undef, $expires);
7074         git_print_page_nav('commit', '',
7075                            $hash, $co{'tree'}, $hash,
7076                            $formats_nav);
7077
7078         if (defined $co{'parent'}) {
7079                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7080         } else {
7081                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7082         }
7083         print "<div class=\"title_text\">\n" .
7084               "<table class=\"object_header\">\n";
7085         git_print_authorship_rows(\%co);
7086         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7087         print "<tr>" .
7088               "<td>tree</td>" .
7089               "<td class=\"sha1\">" .
7090               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7091                        class => "list"}, $co{'tree'}) .
7092               "</td>" .
7093               "<td class=\"link\">" .
7094               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7095                       "tree");
7096         my $snapshot_links = format_snapshot_links($hash);
7097         if (defined $snapshot_links) {
7098                 print " | " . $snapshot_links;
7099         }
7100         print "</td>" .
7101               "</tr>\n";
7102
7103         foreach my $par (@$parents) {
7104                 print "<tr>" .
7105                       "<td>parent</td>" .
7106                       "<td class=\"sha1\">" .
7107                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7108                                class => "list"}, $par) .
7109                       "</td>" .
7110                       "<td class=\"link\">" .
7111                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7112                       " | " .
7113                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7114                       "</td>" .
7115                       "</tr>\n";
7116         }
7117         print "</table>".
7118               "</div>\n";
7119
7120         print "<div class=\"page_body\">\n";
7121         git_print_log($co{'comment'});
7122         print "</div>\n";
7123
7124         git_difftree_body(\@difftree, $hash, @$parents);
7125
7126         git_footer_html();
7127 }
7128
7129 sub git_object {
7130         # object is defined by:
7131         # - hash or hash_base alone
7132         # - hash_base and file_name
7133         my $type;
7134
7135         # - hash or hash_base alone
7136         if ($hash || ($hash_base && !defined $file_name)) {
7137                 my $object_id = $hash || $hash_base;
7138
7139                 open my $fd, "-|", quote_command(
7140                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7141                         or die_error(404, "Object does not exist");
7142                 $type = <$fd>;
7143                 chomp $type;
7144                 close $fd
7145                         or die_error(404, "Object does not exist");
7146
7147         # - hash_base and file_name
7148         } elsif ($hash_base && defined $file_name) {
7149                 $file_name =~ s,/+$,,;
7150
7151                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7152                         or die_error(404, "Base object does not exist");
7153
7154                 # here errors should not hapen
7155                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7156                         or die_error(500, "Open git-ls-tree failed");
7157                 my $line = <$fd>;
7158                 close $fd;
7159
7160                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7161                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7162                         die_error(404, "File or directory for given base does not exist");
7163                 }
7164                 $type = $2;
7165                 $hash = $3;
7166         } else {
7167                 die_error(400, "Not enough information to find object");
7168         }
7169
7170         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7171                                           hash=>$hash, hash_base=>$hash_base,
7172                                           file_name=>$file_name),
7173                              -status => '302 Found');
7174 }
7175
7176 sub git_blobdiff {
7177         my $format = shift || 'html';
7178         my $diff_style = $input_params{'diff_style'} || 'inline';
7179
7180         my $fd;
7181         my @difftree;
7182         my %diffinfo;
7183         my $expires;
7184
7185         # preparing $fd and %diffinfo for git_patchset_body
7186         # new style URI
7187         if (defined $hash_base && defined $hash_parent_base) {
7188                 if (defined $file_name) {
7189                         # read raw output
7190                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7191                                 $hash_parent_base, $hash_base,
7192                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7193                                 or die_error(500, "Open git-diff-tree failed");
7194                         @difftree = map { chomp; $_ } <$fd>;
7195                         close $fd
7196                                 or die_error(404, "Reading git-diff-tree failed");
7197                         @difftree
7198                                 or die_error(404, "Blob diff not found");
7199
7200                 } elsif (defined $hash &&
7201                          $hash =~ /[0-9a-fA-F]{40}/) {
7202                         # try to find filename from $hash
7203
7204                         # read filtered raw output
7205                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7206                                 $hash_parent_base, $hash_base, "--"
7207                                 or die_error(500, "Open git-diff-tree failed");
7208                         @difftree =
7209                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7210                                 # $hash == to_id
7211                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7212                                 map { chomp; $_ } <$fd>;
7213                         close $fd
7214                                 or die_error(404, "Reading git-diff-tree failed");
7215                         @difftree
7216                                 or die_error(404, "Blob diff not found");
7217
7218                 } else {
7219                         die_error(400, "Missing one of the blob diff parameters");
7220                 }
7221
7222                 if (@difftree > 1) {
7223                         die_error(400, "Ambiguous blob diff specification");
7224                 }
7225
7226                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7227                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7228                 $file_name   ||= $diffinfo{'to_file'};
7229
7230                 $hash_parent ||= $diffinfo{'from_id'};
7231                 $hash        ||= $diffinfo{'to_id'};
7232
7233                 # non-textual hash id's can be cached
7234                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7235                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7236                         $expires = '+1d';
7237                 }
7238
7239                 # open patch output
7240                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7241                         '-p', ($format eq 'html' ? "--full-index" : ()),
7242                         $hash_parent_base, $hash_base,
7243                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7244                         or die_error(500, "Open git-diff-tree failed");
7245         }
7246
7247         # old/legacy style URI -- not generated anymore since 1.4.3.
7248         if (!%diffinfo) {
7249                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7250         }
7251
7252         # header
7253         if ($format eq 'html') {
7254                 my $formats_nav =
7255                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7256                                 "raw");
7257                 $formats_nav .= diff_style_nav($diff_style);
7258                 git_header_html(undef, $expires);
7259                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7260                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7261                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7262                 } else {
7263                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7264                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7265                 }
7266                 if (defined $file_name) {
7267                         git_print_page_path($file_name, "blob", $hash_base);
7268                 } else {
7269                         print "<div class=\"page_path\"></div>\n";
7270                 }
7271
7272         } elsif ($format eq 'plain') {
7273                 print $cgi->header(
7274                         -type => 'text/plain',
7275                         -charset => 'utf-8',
7276                         -expires => $expires,
7277                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7278
7279                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7280
7281         } else {
7282                 die_error(400, "Unknown blobdiff format");
7283         }
7284
7285         # patch
7286         if ($format eq 'html') {
7287                 print "<div class=\"page_body\">\n";
7288
7289                 git_patchset_body($fd, $diff_style,
7290                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7291                 close $fd;
7292
7293                 print "</div>\n"; # class="page_body"
7294                 git_footer_html();
7295
7296         } else {
7297                 while (my $line = <$fd>) {
7298                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7299                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7300
7301                         print $line;
7302
7303                         last if $line =~ m!^\+\+\+!;
7304                 }
7305                 local $/ = undef;
7306                 print <$fd>;
7307                 close $fd;
7308         }
7309 }
7310
7311 sub git_blobdiff_plain {
7312         git_blobdiff('plain');
7313 }
7314
7315 # assumes that it is added as later part of already existing navigation,
7316 # so it returns "| foo | bar" rather than just "foo | bar"
7317 sub diff_style_nav {
7318         my ($diff_style, $is_combined) = @_;
7319         $diff_style ||= 'inline';
7320
7321         return "" if ($is_combined);
7322
7323         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7324         my %styles = @styles;
7325         @styles =
7326                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7327
7328         return join '',
7329                 map { " | ".$_ }
7330                 map {
7331                         $_ eq $diff_style ? $styles{$_} :
7332                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7333                 } @styles;
7334 }
7335
7336 sub git_commitdiff {
7337         my %params = @_;
7338         my $format = $params{-format} || 'html';
7339         my $diff_style = $input_params{'diff_style'} || 'inline';
7340
7341         my ($patch_max) = gitweb_get_feature('patches');
7342         if ($format eq 'patch') {
7343                 die_error(403, "Patch view not allowed") unless $patch_max;
7344         }
7345
7346         $hash ||= $hash_base || "HEAD";
7347         my %co = parse_commit($hash)
7348             or die_error(404, "Unknown commit object");
7349
7350         # choose format for commitdiff for merge
7351         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7352                 $hash_parent = '--cc';
7353         }
7354         # we need to prepare $formats_nav before almost any parameter munging
7355         my $formats_nav;
7356         if ($format eq 'html') {
7357                 $formats_nav =
7358                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7359                                 "raw");
7360                 if ($patch_max && @{$co{'parents'}} <= 1) {
7361                         $formats_nav .= " | " .
7362                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7363                                         "patch");
7364                 }
7365                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7366
7367                 if (defined $hash_parent &&
7368                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7369                         # commitdiff with two commits given
7370                         my $hash_parent_short = $hash_parent;
7371                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7372                                 $hash_parent_short = substr($hash_parent, 0, 7);
7373                         }
7374                         $formats_nav .=
7375                                 ' (from';
7376                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7377                                 if ($co{'parents'}[$i] eq $hash_parent) {
7378                                         $formats_nav .= ' parent ' . ($i+1);
7379                                         last;
7380                                 }
7381                         }
7382                         $formats_nav .= ': ' .
7383                                 $cgi->a({-href => href(-replay=>1,
7384                                                        hash=>$hash_parent, hash_base=>undef)},
7385                                         esc_html($hash_parent_short)) .
7386                                 ')';
7387                 } elsif (!$co{'parent'}) {
7388                         # --root commitdiff
7389                         $formats_nav .= ' (initial)';
7390                 } elsif (scalar @{$co{'parents'}} == 1) {
7391                         # single parent commit
7392                         $formats_nav .=
7393                                 ' (parent: ' .
7394                                 $cgi->a({-href => href(-replay=>1,
7395                                                        hash=>$co{'parent'}, hash_base=>undef)},
7396                                         esc_html(substr($co{'parent'}, 0, 7))) .
7397                                 ')';
7398                 } else {
7399                         # merge commit
7400                         if ($hash_parent eq '--cc') {
7401                                 $formats_nav .= ' | ' .
7402                                         $cgi->a({-href => href(-replay=>1,
7403                                                                hash=>$hash, hash_parent=>'-c')},
7404                                                 'combined');
7405                         } else { # $hash_parent eq '-c'
7406                                 $formats_nav .= ' | ' .
7407                                         $cgi->a({-href => href(-replay=>1,
7408                                                                hash=>$hash, hash_parent=>'--cc')},
7409                                                 'compact');
7410                         }
7411                         $formats_nav .=
7412                                 ' (merge: ' .
7413                                 join(' ', map {
7414                                         $cgi->a({-href => href(-replay=>1,
7415                                                                hash=>$_, hash_base=>undef)},
7416                                                 esc_html(substr($_, 0, 7)));
7417                                 } @{$co{'parents'}} ) .
7418                                 ')';
7419                 }
7420         }
7421
7422         my $hash_parent_param = $hash_parent;
7423         if (!defined $hash_parent_param) {
7424                 # --cc for multiple parents, --root for parentless
7425                 $hash_parent_param =
7426                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7427         }
7428
7429         # read commitdiff
7430         my $fd;
7431         my @difftree;
7432         if ($format eq 'html') {
7433                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7434                         "--no-commit-id", "--patch-with-raw", "--full-index",
7435                         $hash_parent_param, $hash, "--"
7436                         or die_error(500, "Open git-diff-tree failed");
7437
7438                 while (my $line = <$fd>) {
7439                         chomp $line;
7440                         # empty line ends raw part of diff-tree output
7441                         last unless $line;
7442                         push @difftree, scalar parse_difftree_raw_line($line);
7443                 }
7444
7445         } elsif ($format eq 'plain') {
7446                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7447                         '-p', $hash_parent_param, $hash, "--"
7448                         or die_error(500, "Open git-diff-tree failed");
7449         } elsif ($format eq 'patch') {
7450                 # For commit ranges, we limit the output to the number of
7451                 # patches specified in the 'patches' feature.
7452                 # For single commits, we limit the output to a single patch,
7453                 # diverging from the git-format-patch default.
7454                 my @commit_spec = ();
7455                 if ($hash_parent) {
7456                         if ($patch_max > 0) {
7457                                 push @commit_spec, "-$patch_max";
7458                         }
7459                         push @commit_spec, '-n', "$hash_parent..$hash";
7460                 } else {
7461                         if ($params{-single}) {
7462                                 push @commit_spec, '-1';
7463                         } else {
7464                                 if ($patch_max > 0) {
7465                                         push @commit_spec, "-$patch_max";
7466                                 }
7467                                 push @commit_spec, "-n";
7468                         }
7469                         push @commit_spec, '--root', $hash;
7470                 }
7471                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7472                         '--encoding=utf8', '--stdout', @commit_spec
7473                         or die_error(500, "Open git-format-patch failed");
7474         } else {
7475                 die_error(400, "Unknown commitdiff format");
7476         }
7477
7478         # non-textual hash id's can be cached
7479         my $expires;
7480         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7481                 $expires = "+1d";
7482         }
7483
7484         # write commit message
7485         if ($format eq 'html') {
7486                 my $refs = git_get_references();
7487                 my $ref = format_ref_marker($refs, $co{'id'});
7488
7489                 git_header_html(undef, $expires);
7490                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7491                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7492                 print "<div class=\"title_text\">\n" .
7493                       "<table class=\"object_header\">\n";
7494                 git_print_authorship_rows(\%co);
7495                 print "</table>".
7496                       "</div>\n";
7497                 print "<div class=\"page_body\">\n";
7498                 if (@{$co{'comment'}} > 1) {
7499                         print "<div class=\"log\">\n";
7500                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7501                         print "</div>\n"; # class="log"
7502                 }
7503
7504         } elsif ($format eq 'plain') {
7505                 my $refs = git_get_references("tags");
7506                 my $tagname = git_get_rev_name_tags($hash);
7507                 my $filename = basename($project) . "-$hash.patch";
7508
7509                 print $cgi->header(
7510                         -type => 'text/plain',
7511                         -charset => 'utf-8',
7512                         -expires => $expires,
7513                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7514                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7515                 print "From: " . to_utf8($co{'author'}) . "\n";
7516                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7517                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7518
7519                 print "X-Git-Tag: $tagname\n" if $tagname;
7520                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7521
7522                 foreach my $line (@{$co{'comment'}}) {
7523                         print to_utf8($line) . "\n";
7524                 }
7525                 print "---\n\n";
7526         } elsif ($format eq 'patch') {
7527                 my $filename = basename($project) . "-$hash.patch";
7528
7529                 print $cgi->header(
7530                         -type => 'text/plain',
7531                         -charset => 'utf-8',
7532                         -expires => $expires,
7533                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7534         }
7535
7536         # write patch
7537         if ($format eq 'html') {
7538                 my $use_parents = !defined $hash_parent ||
7539                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7540                 git_difftree_body(\@difftree, $hash,
7541                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7542                 print "<br/>\n";
7543
7544                 git_patchset_body($fd, $diff_style,
7545                                   \@difftree, $hash,
7546                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7547                 close $fd;
7548                 print "</div>\n"; # class="page_body"
7549                 git_footer_html();
7550
7551         } elsif ($format eq 'plain') {
7552                 local $/ = undef;
7553                 print <$fd>;
7554                 close $fd
7555                         or print "Reading git-diff-tree failed\n";
7556         } elsif ($format eq 'patch') {
7557                 local $/ = undef;
7558                 print <$fd>;
7559                 close $fd
7560                         or print "Reading git-format-patch failed\n";
7561         }
7562 }
7563
7564 sub git_commitdiff_plain {
7565         git_commitdiff(-format => 'plain');
7566 }
7567
7568 # format-patch-style patches
7569 sub git_patch {
7570         git_commitdiff(-format => 'patch', -single => 1);
7571 }
7572
7573 sub git_patches {
7574         git_commitdiff(-format => 'patch');
7575 }
7576
7577 sub git_history {
7578         git_log_generic('history', \&git_history_body,
7579                         $hash_base, $hash_parent_base,
7580                         $file_name, $hash);
7581 }
7582
7583 sub git_search {
7584         $searchtype ||= 'commit';
7585
7586         # check if appropriate features are enabled
7587         gitweb_check_feature('search')
7588                 or die_error(403, "Search is disabled");
7589         if ($searchtype eq 'pickaxe') {
7590                 # pickaxe may take all resources of your box and run for several minutes
7591                 # with every query - so decide by yourself how public you make this feature
7592                 gitweb_check_feature('pickaxe')
7593                         or die_error(403, "Pickaxe search is disabled");
7594         }
7595         if ($searchtype eq 'grep') {
7596                 # grep search might be potentially CPU-intensive, too
7597                 gitweb_check_feature('grep')
7598                         or die_error(403, "Grep search is disabled");
7599         }
7600
7601         if (!defined $searchtext) {
7602                 die_error(400, "Text field is empty");
7603         }
7604         if (!defined $hash) {
7605                 $hash = git_get_head_hash($project);
7606         }
7607         my %co = parse_commit($hash);
7608         if (!%co) {
7609                 die_error(404, "Unknown commit object");
7610         }
7611         if (!defined $page) {
7612                 $page = 0;
7613         }
7614
7615         if ($searchtype eq 'commit' ||
7616             $searchtype eq 'author' ||
7617             $searchtype eq 'committer') {
7618                 git_search_message(%co);
7619         } elsif ($searchtype eq 'pickaxe') {
7620                 git_search_changes(%co);
7621         } elsif ($searchtype eq 'grep') {
7622                 git_search_files(%co);
7623         } else {
7624                 die_error(400, "Unknown search type");
7625         }
7626 }
7627
7628 sub git_search_help {
7629         git_header_html();
7630         git_print_page_nav('','', $hash,$hash,$hash);
7631         print <<EOT;
7632 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7633 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7634 the pattern entered is recognized as the POSIX extended
7635 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7636 insensitive).</p>
7637 <dl>
7638 <dt><b>commit</b></dt>
7639 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7640 EOT
7641         my $have_grep = gitweb_check_feature('grep');
7642         if ($have_grep) {
7643                 print <<EOT;
7644 <dt><b>grep</b></dt>
7645 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7646     a different one) are searched for the given pattern. On large trees, this search can take
7647 a while and put some strain on the server, so please use it with some consideration. Note that
7648 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7649 case-sensitive.</dd>
7650 EOT
7651         }
7652         print <<EOT;
7653 <dt><b>author</b></dt>
7654 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7655 <dt><b>committer</b></dt>
7656 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7657 EOT
7658         my $have_pickaxe = gitweb_check_feature('pickaxe');
7659         if ($have_pickaxe) {
7660                 print <<EOT;
7661 <dt><b>pickaxe</b></dt>
7662 <dd>All commits that caused the string to appear or disappear from any file (changes that
7663 added, removed or "modified" the string) will be listed. This search can take a while and
7664 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7665 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7666 EOT
7667         }
7668         print "</dl>\n";
7669         git_footer_html();
7670 }
7671
7672 sub git_shortlog {
7673         git_log_generic('shortlog', \&git_shortlog_body,
7674                         $hash, $hash_parent);
7675 }
7676
7677 ## ......................................................................
7678 ## feeds (RSS, Atom; OPML)
7679
7680 sub git_feed {
7681         my $format = shift || 'atom';
7682         my $have_blame = gitweb_check_feature('blame');
7683
7684         # Atom: http://www.atomenabled.org/developers/syndication/
7685         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7686         if ($format ne 'rss' && $format ne 'atom') {
7687                 die_error(400, "Unknown web feed format");
7688         }
7689
7690         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7691         my $head = $hash || 'HEAD';
7692         my @commitlist = parse_commits($head, 150, 0, $file_name);
7693
7694         my %latest_commit;
7695         my %latest_date;
7696         my $content_type = "application/$format+xml";
7697         if (defined $cgi->http('HTTP_ACCEPT') &&
7698                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7699                 # browser (feed reader) prefers text/xml
7700                 $content_type = 'text/xml';
7701         }
7702         if (defined($commitlist[0])) {
7703                 %latest_commit = %{$commitlist[0]};
7704                 my $latest_epoch = $latest_commit{'committer_epoch'};
7705                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7706                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7707                 if (defined $if_modified) {
7708                         my $since;
7709                         if (eval { require HTTP::Date; 1; }) {
7710                                 $since = HTTP::Date::str2time($if_modified);
7711                         } elsif (eval { require Time::ParseDate; 1; }) {
7712                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7713                         }
7714                         if (defined $since && $latest_epoch <= $since) {
7715                                 print $cgi->header(
7716                                         -type => $content_type,
7717                                         -charset => 'utf-8',
7718                                         -last_modified => $latest_date{'rfc2822'},
7719                                         -status => '304 Not Modified');
7720                                 return;
7721                         }
7722                 }
7723                 print $cgi->header(
7724                         -type => $content_type,
7725                         -charset => 'utf-8',
7726                         -last_modified => $latest_date{'rfc2822'});
7727         } else {
7728                 print $cgi->header(
7729                         -type => $content_type,
7730                         -charset => 'utf-8');
7731         }
7732
7733         # Optimization: skip generating the body if client asks only
7734         # for Last-Modified date.
7735         return if ($cgi->request_method() eq 'HEAD');
7736
7737         # header variables
7738         my $title = "$site_name - $project/$action";
7739         my $feed_type = 'log';
7740         if (defined $hash) {
7741                 $title .= " - '$hash'";
7742                 $feed_type = 'branch log';
7743                 if (defined $file_name) {
7744                         $title .= " :: $file_name";
7745                         $feed_type = 'history';
7746                 }
7747         } elsif (defined $file_name) {
7748                 $title .= " - $file_name";
7749                 $feed_type = 'history';
7750         }
7751         $title .= " $feed_type";
7752         my $descr = git_get_project_description($project);
7753         if (defined $descr) {
7754                 $descr = esc_html($descr);
7755         } else {
7756                 $descr = "$project " .
7757                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7758                          " feed";
7759         }
7760         my $owner = git_get_project_owner($project);
7761         $owner = esc_html($owner);
7762
7763         #header
7764         my $alt_url;
7765         if (defined $file_name) {
7766                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7767         } elsif (defined $hash) {
7768                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7769         } else {
7770                 $alt_url = href(-full=>1, action=>"summary");
7771         }
7772         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7773         if ($format eq 'rss') {
7774                 print <<XML;
7775 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7776 <channel>
7777 XML
7778                 print "<title>$title</title>\n" .
7779                       "<link>$alt_url</link>\n" .
7780                       "<description>$descr</description>\n" .
7781                       "<language>en</language>\n" .
7782                       # project owner is responsible for 'editorial' content
7783                       "<managingEditor>$owner</managingEditor>\n";
7784                 if (defined $logo || defined $favicon) {
7785                         # prefer the logo to the favicon, since RSS
7786                         # doesn't allow both
7787                         my $img = esc_url($logo || $favicon);
7788                         print "<image>\n" .
7789                               "<url>$img</url>\n" .
7790                               "<title>$title</title>\n" .
7791                               "<link>$alt_url</link>\n" .
7792                               "</image>\n";
7793                 }
7794                 if (%latest_date) {
7795                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7796                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7797                 }
7798                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7799         } elsif ($format eq 'atom') {
7800                 print <<XML;
7801 <feed xmlns="http://www.w3.org/2005/Atom">
7802 XML
7803                 print "<title>$title</title>\n" .
7804                       "<subtitle>$descr</subtitle>\n" .
7805                       '<link rel="alternate" type="text/html" href="' .
7806                       $alt_url . '" />' . "\n" .
7807                       '<link rel="self" type="' . $content_type . '" href="' .
7808                       $cgi->self_url() . '" />' . "\n" .
7809                       "<id>" . href(-full=>1) . "</id>\n" .
7810                       # use project owner for feed author
7811                       "<author><name>$owner</name></author>\n";
7812                 if (defined $favicon) {
7813                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7814                 }
7815                 if (defined $logo) {
7816                         # not twice as wide as tall: 72 x 27 pixels
7817                         print "<logo>" . esc_url($logo) . "</logo>\n";
7818                 }
7819                 if (! %latest_date) {
7820                         # dummy date to keep the feed valid until commits trickle in:
7821                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7822                 } else {
7823                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7824                 }
7825                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7826         }
7827
7828         # contents
7829         for (my $i = 0; $i <= $#commitlist; $i++) {
7830                 my %co = %{$commitlist[$i]};
7831                 my $commit = $co{'id'};
7832                 # we read 150, we always show 30 and the ones more recent than 48 hours
7833                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7834                         last;
7835                 }
7836                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7837
7838                 # get list of changed files
7839                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7840                         $co{'parent'} || "--root",
7841                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7842                         or next;
7843                 my @difftree = map { chomp; $_ } <$fd>;
7844                 close $fd
7845                         or next;
7846
7847                 # print element (entry, item)
7848                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7849                 if ($format eq 'rss') {
7850                         print "<item>\n" .
7851                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7852                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7853                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7854                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7855                               "<link>$co_url</link>\n" .
7856                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7857                               "<content:encoded>" .
7858                               "<![CDATA[\n";
7859                 } elsif ($format eq 'atom') {
7860                         print "<entry>\n" .
7861                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7862                               "<updated>$cd{'iso-8601'}</updated>\n" .
7863                               "<author>\n" .
7864                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7865                         if ($co{'author_email'}) {
7866                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7867                         }
7868                         print "</author>\n" .
7869                               # use committer for contributor
7870                               "<contributor>\n" .
7871                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7872                         if ($co{'committer_email'}) {
7873                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7874                         }
7875                         print "</contributor>\n" .
7876                               "<published>$cd{'iso-8601'}</published>\n" .
7877                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7878                               "<id>$co_url</id>\n" .
7879                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7880                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7881                 }
7882                 my $comment = $co{'comment'};
7883                 print "<pre>\n";
7884                 foreach my $line (@$comment) {
7885                         $line = esc_html($line);
7886                         print "$line\n";
7887                 }
7888                 print "</pre><ul>\n";
7889                 foreach my $difftree_line (@difftree) {
7890                         my %difftree = parse_difftree_raw_line($difftree_line);
7891                         next if !$difftree{'from_id'};
7892
7893                         my $file = $difftree{'file'} || $difftree{'to_file'};
7894
7895                         print "<li>" .
7896                               "[" .
7897                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7898                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7899                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7900                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7901                                       -title => "diff"}, 'D');
7902                         if ($have_blame) {
7903                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7904                                                              file_name=>$file, hash_base=>$commit),
7905                                               -title => "blame"}, 'B');
7906                         }
7907                         # if this is not a feed of a file history
7908                         if (!defined $file_name || $file_name ne $file) {
7909                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7910                                                              file_name=>$file, hash=>$commit),
7911                                               -title => "history"}, 'H');
7912                         }
7913                         $file = esc_path($file);
7914                         print "] ".
7915                               "$file</li>\n";
7916                 }
7917                 if ($format eq 'rss') {
7918                         print "</ul>]]>\n" .
7919                               "</content:encoded>\n" .
7920                               "</item>\n";
7921                 } elsif ($format eq 'atom') {
7922                         print "</ul>\n</div>\n" .
7923                               "</content>\n" .
7924                               "</entry>\n";
7925                 }
7926         }
7927
7928         # end of feed
7929         if ($format eq 'rss') {
7930                 print "</channel>\n</rss>\n";
7931         } elsif ($format eq 'atom') {
7932                 print "</feed>\n";
7933         }
7934 }
7935
7936 sub git_rss {
7937         git_feed('rss');
7938 }
7939
7940 sub git_atom {
7941         git_feed('atom');
7942 }
7943
7944 sub git_opml {
7945         my @list = git_get_projects_list($project_filter, $strict_export);
7946         if (!@list) {
7947                 die_error(404, "No projects found");
7948         }
7949
7950         print $cgi->header(
7951                 -type => 'text/xml',
7952                 -charset => 'utf-8',
7953                 -content_disposition => 'inline; filename="opml.xml"');
7954
7955         my $title = esc_html($site_name);
7956         my $filter = " within subdirectory ";
7957         if (defined $project_filter) {
7958                 $filter .= esc_html($project_filter);
7959         } else {
7960                 $filter = "";
7961         }
7962         print <<XML;
7963 <?xml version="1.0" encoding="utf-8"?>
7964 <opml version="1.0">
7965 <head>
7966   <title>$title OPML Export$filter</title>
7967 </head>
7968 <body>
7969 <outline text="git RSS feeds">
7970 XML
7971
7972         foreach my $pr (@list) {
7973                 my %proj = %$pr;
7974                 my $head = git_get_head_hash($proj{'path'});
7975                 if (!defined $head) {
7976                         next;
7977                 }
7978                 $git_dir = "$projectroot/$proj{'path'}";
7979                 my %co = parse_commit($head);
7980                 if (!%co) {
7981                         next;
7982                 }
7983
7984                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7985                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7986                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7987                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7988         }
7989         print <<XML;
7990 </outline>
7991 </body>
7992 </opml>
7993 XML
7994 }