Lady’s Gitweb - Gitweb/blob - gitweb.perl

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