gitweb/gitweb.perl

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