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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101
 102 # URI of GIT logo (72x27 size)
 103 our $logo = "++GITWEB_LOGO++";
 104 # URI of GIT favicon, assumed to be image/png type
 105 our $favicon = "++GITWEB_FAVICON++";
 106 # URI of gitweb.js (JavaScript code for gitweb)
 107 our $javascript = "++GITWEB_JS++";
 108
 109 # URI and label (title) of GIT logo link
 110 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 111 #our $logo_label = "git documentation";
 112 our $logo_url = "http://git-scm.com/";
 113 our $logo_label = "git homepage";
 114
 115 # source of projects list
 116 our $projects_list = "++GITWEB_LIST++";
 117
 118 # the width (in characters) of the projects list "Description" column
 119 our $projects_list_description_width = 25;
 120
 121 # group projects by category on the projects list
 122 # (enabled if this variable evaluates to true)
 123 our $projects_list_group_categories = 0;
 124
 125 # default category if none specified
 126 # (leave the empty string for no category)
 127 our $project_list_default_category = "";
 128
 129 # default order of projects list
 130 # valid values are none, project, descr, owner, and age
 131 our $default_projects_order = "project";
 132
 133 # show repository only if this file exists
 134 # (only effective if this variable evaluates to true)
 135 our $export_ok = "++GITWEB_EXPORT_OK++";
 136
 137 # show repository only if this subroutine returns true
 138 # when given the path to the project, for example:
 139 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 140 our $export_auth_hook = undef;
 141
 142 # only allow viewing of repositories also shown on the overview page
 143 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 144
 145 # list of git base URLs used for URL to where fetch project from,
 146 # i.e. full URL is "$git_base_url/$project"
 147 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 148
 149 # default blob_plain mimetype and default charset for text/plain blob
 150 our $default_blob_plain_mimetype = 'text/plain';
 151 our $default_text_plain_charset  = undef;
 152
 153 # file to use for guessing MIME types before trying /etc/mime.types
 154 # (relative to the current git repository)
 155 our $mimetypes_file = undef;
 156
 157 # assume this charset if line contains non-UTF-8 characters;
 158 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 159 # for which encoding all byte sequences are valid, for example
 160 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 161 # could be even 'utf-8' for the old behavior)
 162 our $fallback_encoding = 'latin1';
 163
 164 # rename detection options for git-diff and git-diff-tree
 165 # - default is '-M', with the cost proportional to
 166 #   (number of removed files) * (number of new files).
 167 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 168 #   (number of changed files + number of removed files) * (number of new files)
 169 # - even more costly is '-C', '--find-copies-harder' with cost
 170 #   (number of files in the original tree) * (number of new files)
 171 # - one might want to include '-B' option, e.g. '-B', '-M'
 172 our @diff_opts = ('-M'); # taken from git_commit
 173
 174 # Disables features that would allow repository owners to inject script into
 175 # the gitweb domain.
 176 our $prevent_xss = 0;
 177
 178 # Path to the highlight executable to use (must be the one from
 179 # http://www.andre-simon.de due to assumptions about parameters and output).
 180 # Useful if highlight is not installed on your webserver's PATH.
 181 # [Default: highlight]
 182 our $highlight_bin = "++HIGHLIGHT_BIN++";
 183
 184 # information about snapshot formats that gitweb is capable of serving
 185 our %known_snapshot_formats = (
 186         # name => {
 187         #       'display' => display name,
 188         #       'type' => mime type,
 189         #       'suffix' => filename suffix,
 190         #       'format' => --format for git-archive,
 191         #       'compressor' => [compressor command and arguments]
 192         #                       (array reference, optional)
 193         #       'disabled' => boolean (optional)}
 194         #
 195         'tgz' => {
 196                 'display' => 'tar.gz',
 197                 'type' => 'application/x-gzip',
 198                 'suffix' => '.tar.gz',
 199                 'format' => 'tar',
 200                 'compressor' => ['gzip', '-n']},
 201
 202         'tbz2' => {
 203                 'display' => 'tar.bz2',
 204                 'type' => 'application/x-bzip2',
 205                 'suffix' => '.tar.bz2',
 206                 'format' => 'tar',
 207                 'compressor' => ['bzip2']},
 208
 209         'txz' => {
 210                 'display' => 'tar.xz',
 211                 'type' => 'application/x-xz',
 212                 'suffix' => '.tar.xz',
 213                 'format' => 'tar',
 214                 'compressor' => ['xz'],
 215                 'disabled' => 1},
 216
 217         'zip' => {
 218                 'display' => 'zip',
 219                 'type' => 'application/x-zip',
 220                 'suffix' => '.zip',
 221                 'format' => 'zip'},
 222 );
 223
 224 # Aliases so we understand old gitweb.snapshot values in repository
 225 # configuration.
 226 our %known_snapshot_format_aliases = (
 227         'gzip'  => 'tgz',
 228         'bzip2' => 'tbz2',
 229         'xz'    => 'txz',
 230
 231         # backward compatibility: legacy gitweb config support
 232         'x-gzip' => undef, 'gz' => undef,
 233         'x-bzip2' => undef, 'bz2' => undef,
 234         'x-zip' => undef, '' => undef,
 235 );
 236
 237 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 238 # are changed, it may be appropriate to change these values too via
 239 # $GITWEB_CONFIG.
 240 our %avatar_size = (
 241         'default' => 16,
 242         'double'  => 32
 243 );
 244
 245 # Used to set the maximum load that we will still respond to gitweb queries.
 246 # If server load exceed this value then return "503 server busy" error.
 247 # If gitweb cannot determined server load, it is taken to be 0.
 248 # Leave it undefined (or set to 'undef') to turn off load checking.
 249 our $maxload = 300;
 250
 251 # configuration for 'highlight' (http://www.andre-simon.de/)
 252 # match by basename
 253 our %highlight_basename = (
 254         #'Program' => 'py',
 255         #'Library' => 'py',
 256         'SConstruct' => 'py', # SCons equivalent of Makefile
 257         'Makefile' => 'make',
 258 );
 259 # match by extension
 260 our %highlight_ext = (
 261         # main extensions, defining name of syntax;
 262         # see files in /usr/share/highlight/langDefs/ directory
 263         map { $_ => $_ }
 264                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 265         # alternate extensions, see /etc/highlight/filetypes.conf
 266         'h' => 'c',
 267         map { $_ => 'sh'  } qw(bash zsh ksh),
 268         map { $_ => 'cpp' } qw(cxx c++ cc),
 269         map { $_ => 'php' } qw(php3 php4 php5 phps),
 270         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 271         map { $_ => 'make'} qw(mak mk),
 272         map { $_ => 'xml' } qw(xhtml html htm),
 273 );
 274
 275 # You define site-wide feature defaults here; override them with
 276 # $GITWEB_CONFIG as necessary.
 277 our %feature = (
 278         # feature => {
 279         #       'sub' => feature-sub (subroutine),
 280         #       'override' => allow-override (boolean),
 281         #       'default' => [ default options...] (array reference)}
 282         #
 283         # if feature is overridable (it means that allow-override has true value),
 284         # then feature-sub will be called with default options as parameters;
 285         # return value of feature-sub indicates if to enable specified feature
 286         #
 287         # if there is no 'sub' key (no feature-sub), then feature cannot be
 288         # overridden
 289         #
 290         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 291         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 292         # is enabled
 293
 294         # Enable the 'blame' blob view, showing the last commit that modified
 295         # each line in the file. This can be very CPU-intensive.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'blame'}{'default'} = [1];
 299         # To have project specific config enable override in $GITWEB_CONFIG
 300         # $feature{'blame'}{'override'} = 1;
 301         # and in project config gitweb.blame = 0|1;
 302         'blame' => {
 303                 'sub' => sub { feature_bool('blame', @_) },
 304                 'override' => 0,
 305                 'default' => [0]},
 306
 307         # Enable the 'snapshot' link, providing a compressed archive of any
 308         # tree. This can potentially generate high traffic if you have large
 309         # project.
 310
 311         # Value is a list of formats defined in %known_snapshot_formats that
 312         # you wish to offer.
 313         # To disable system wide have in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'default'} = [];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'snapshot'}{'override'} = 1;
 317         # and in project config, a comma-separated list of formats or "none"
 318         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 319         'snapshot' => {
 320                 'sub' => \&feature_snapshot,
 321                 'override' => 0,
 322                 'default' => ['tgz']},
 323
 324         # Enable text search, which will list the commits which match author,
 325         # committer or commit text to a given string.  Enabled by default.
 326         # Project specific override is not supported.
 327         #
 328         # Note that this controls all search features, which means that if
 329         # it is disabled, then 'grep' and 'pickaxe' search would also be
 330         # disabled.
 331         'search' => {
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable grep search, which will list the files in currently selected
 336         # tree containing the given string. Enabled by default. This can be
 337         # potentially CPU-intensive, of course.
 338         # Note that you need to have 'search' feature enabled too.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'grep'}{'default'} = [1];
 342         # To have project specific config enable override in $GITWEB_CONFIG
 343         # $feature{'grep'}{'override'} = 1;
 344         # and in project config gitweb.grep = 0|1;
 345         'grep' => {
 346                 'sub' => sub { feature_bool('grep', @_) },
 347                 'override' => 0,
 348                 'default' => [1]},
 349
 350         # Enable the pickaxe search, which will list the commits that modified
 351         # a given string in a file. This can be practical and quite faster
 352         # alternative to 'blame', but still potentially CPU-intensive.
 353         # Note that you need to have 'search' feature enabled too.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'pickaxe'}{'default'} = [1];
 357         # To have project specific config enable override in $GITWEB_CONFIG
 358         # $feature{'pickaxe'}{'override'} = 1;
 359         # and in project config gitweb.pickaxe = 0|1;
 360         'pickaxe' => {
 361                 'sub' => sub { feature_bool('pickaxe', @_) },
 362                 'override' => 0,
 363                 'default' => [1]},
 364
 365         # Enable showing size of blobs in a 'tree' view, in a separate
 366         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 367
 368         # To disable system wide have in $GITWEB_CONFIG
 369         # $feature{'show-sizes'}{'default'} = [0];
 370         # To have project specific config enable override in $GITWEB_CONFIG
 371         # $feature{'show-sizes'}{'override'} = 1;
 372         # and in project config gitweb.showsizes = 0|1;
 373         'show-sizes' => {
 374                 'sub' => sub { feature_bool('showsizes', @_) },
 375                 'override' => 0,
 376                 'default' => [1]},
 377
 378         # Make gitweb use an alternative format of the URLs which can be
 379         # more readable and natural-looking: project name is embedded
 380         # directly in the path and the query string contains other
 381         # auxiliary information. All gitweb installations recognize
 382         # URL in either format; this configures in which formats gitweb
 383         # generates links.
 384
 385         # To enable system wide have in $GITWEB_CONFIG
 386         # $feature{'pathinfo'}{'default'} = [1];
 387         # Project specific override is not supported.
 388
 389         # Note that you will need to change the default location of CSS,
 390         # favicon, logo and possibly other files to an absolute URL. Also,
 391         # if gitweb.cgi serves as your indexfile, you will need to force
 392         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 393         'pathinfo' => {
 394                 'override' => 0,
 395                 'default' => [0]},
 396
 397         # Make gitweb consider projects in project root subdirectories
 398         # to be forks of existing projects. Given project $projname.git,
 399         # projects matching $projname/*.git will not be shown in the main
 400         # projects list, instead a '+' mark will be added to $projname
 401         # there and a 'forks' view will be enabled for the project, listing
 402         # all the forks. If project list is taken from a file, forks have
 403         # to be listed after the main project.
 404
 405         # To enable system wide have in $GITWEB_CONFIG
 406         # $feature{'forks'}{'default'} = [1];
 407         # Project specific override is not supported.
 408         'forks' => {
 409                 'override' => 0,
 410                 'default' => [0]},
 411
 412         # Insert custom links to the action bar of all project pages.
 413         # This enables you mainly to link to third-party scripts integrating
 414         # into gitweb; e.g. git-browser for graphical history representation
 415         # or custom web-based repository administration interface.
 416
 417         # The 'default' value consists of a list of triplets in the form
 418         # (label, link, position) where position is the label after which
 419         # to insert the link and link is a format string where %n expands
 420         # to the project name, %f to the project path within the filesystem,
 421         # %h to the current hash (h gitweb parameter) and %b to the current
 422         # hash base (hb gitweb parameter); %% expands to %.
 423
 424         # To enable system wide have in $GITWEB_CONFIG e.g.
 425         # $feature{'actions'}{'default'} = [('graphiclog',
 426         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 427         # Project specific override is not supported.
 428         'actions' => {
 429                 'override' => 0,
 430                 'default' => []},
 431
 432         # Allow gitweb scan project content tags of project repository,
 433         # and display the popular Web 2.0-ish "tag cloud" near the projects
 434         # list.  Note that this is something COMPLETELY different from the
 435         # normal Git tags.
 436
 437         # gitweb by itself can show existing tags, but it does not handle
 438         # tagging itself; you need to do it externally, outside gitweb.
 439         # The format is described in git_get_project_ctags() subroutine.
 440         # You may want to install the HTML::TagCloud Perl module to get
 441         # a pretty tag cloud instead of just a list of tags.
 442
 443         # To enable system wide have in $GITWEB_CONFIG
 444         # $feature{'ctags'}{'default'} = [1];
 445         # Project specific override is not supported.
 446
 447         # In the future whether ctags editing is enabled might depend
 448         # on the value, but using 1 should always mean no editing of ctags.
 449         'ctags' => {
 450                 'override' => 0,
 451                 'default' => [0]},
 452
 453         # The maximum number of patches in a patchset generated in patch
 454         # view. Set this to 0 or undef to disable patch view, or to a
 455         # negative number to remove any limit.
 456
 457         # To disable system wide have in $GITWEB_CONFIG
 458         # $feature{'patches'}{'default'} = [0];
 459         # To have project specific config enable override in $GITWEB_CONFIG
 460         # $feature{'patches'}{'override'} = 1;
 461         # and in project config gitweb.patches = 0|n;
 462         # where n is the maximum number of patches allowed in a patchset.
 463         'patches' => {
 464                 'sub' => \&feature_patches,
 465                 'override' => 0,
 466                 'default' => [16]},
 467
 468         # Avatar support. When this feature is enabled, views such as
 469         # shortlog or commit will display an avatar associated with
 470         # the email of the committer(s) and/or author(s).
 471
 472         # Currently available providers are gravatar and picon.
 473         # If an unknown provider is specified, the feature is disabled.
 474
 475         # Gravatar depends on Digest::MD5.
 476         # Picon currently relies on the indiana.edu database.
 477
 478         # To enable system wide have in $GITWEB_CONFIG
 479         # $feature{'avatar'}{'default'} = ['<provider>'];
 480         # where <provider> is either gravatar or picon.
 481         # To have project specific config enable override in $GITWEB_CONFIG
 482         # $feature{'avatar'}{'override'} = 1;
 483         # and in project config gitweb.avatar = <provider>;
 484         'avatar' => {
 485                 'sub' => \&feature_avatar,
 486                 'override' => 0,
 487                 'default' => ['']},
 488
 489         # Enable displaying how much time and how many git commands
 490         # it took to generate and display page.  Disabled by default.
 491         # Project specific override is not supported.
 492         'timed' => {
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable turning some links into links to actions which require
 497         # JavaScript to run (like 'blame_incremental').  Not enabled by
 498         # default.  Project specific override is currently not supported.
 499         'javascript-actions' => {
 500                 'override' => 0,
 501                 'default' => [0]},
 502
 503         # Enable and configure ability to change common timezone for dates
 504         # in gitweb output via JavaScript.  Enabled by default.
 505         # Project specific override is not supported.
 506         'javascript-timezone' => {
 507                 'override' => 0,
 508                 'default' => [
 509                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 510                                      # or undef to turn off this feature
 511                         'gitweb_tz', # name of cookie where to store selected timezone
 512                         'datetime',  # CSS class used to mark up dates for manipulation
 513                 ]},
 514
 515         # Syntax highlighting support. This is based on Daniel Svensson's
 516         # and Sham Chukoury's work in gitweb-xmms2.git.
 517         # It requires the 'highlight' program present in $PATH,
 518         # and therefore is disabled by default.
 519
 520         # To enable system wide have in $GITWEB_CONFIG
 521         # $feature{'highlight'}{'default'} = [1];
 522
 523         'highlight' => {
 524                 'sub' => sub { feature_bool('highlight', @_) },
 525                 'override' => 0,
 526                 'default' => [0]},
 527
 528         # Enable displaying of remote heads in the heads list
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'remote_heads'}{'default'} = [1];
 532         # To have project specific config enable override in $GITWEB_CONFIG
 533         # $feature{'remote_heads'}{'override'} = 1;
 534         # and in project config gitweb.remote_heads = 0|1;
 535         'remote_heads' => {
 536                 'sub' => sub { feature_bool('remote_heads', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539 );
 540
 541 sub gitweb_get_feature {
 542         my ($name) = @_;
 543         return unless exists $feature{$name};
 544         my ($sub, $override, @defaults) = (
 545                 $feature{$name}{'sub'},
 546                 $feature{$name}{'override'},
 547                 @{$feature{$name}{'default'}});
 548         # project specific override is possible only if we have project
 549         our $git_dir; # global variable, declared later
 550         if (!$override || !defined $git_dir) {
 551                 return @defaults;
 552         }
 553         if (!defined $sub) {
 554                 warn "feature $name is not overridable";
 555                 return @defaults;
 556         }
 557         return $sub->(@defaults);
 558 }
 559
 560 # A wrapper to check if a given feature is enabled.
 561 # With this, you can say
 562 #
 563 #   my $bool_feat = gitweb_check_feature('bool_feat');
 564 #   gitweb_check_feature('bool_feat') or somecode;
 565 #
 566 # instead of
 567 #
 568 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 569 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 570 #
 571 sub gitweb_check_feature {
 572         return (gitweb_get_feature(@_))[0];
 573 }
 574
 575
 576 sub feature_bool {
 577         my $key = shift;
 578         my ($val) = git_get_project_config($key, '--bool');
 579
 580         if (!defined $val) {
 581                 return ($_[0]);
 582         } elsif ($val eq 'true') {
 583                 return (1);
 584         } elsif ($val eq 'false') {
 585                 return (0);
 586         }
 587 }
 588
 589 sub feature_snapshot {
 590         my (@fmts) = @_;
 591
 592         my ($val) = git_get_project_config('snapshot');
 593
 594         if ($val) {
 595                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 596         }
 597
 598         return @fmts;
 599 }
 600
 601 sub feature_patches {
 602         my @val = (git_get_project_config('patches', '--int'));
 603
 604         if (@val) {
 605                 return @val;
 606         }
 607
 608         return ($_[0]);
 609 }
 610
 611 sub feature_avatar {
 612         my @val = (git_get_project_config('avatar'));
 613
 614         return @val ? @val : @_;
 615 }
 616
 617 # checking HEAD file with -e is fragile if the repository was
 618 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 619 # and then pruned.
 620 sub check_head_link {
 621         my ($dir) = @_;
 622         my $headfile = "$dir/HEAD";
 623         return ((-e $headfile) ||
 624                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 625 }
 626
 627 sub check_export_ok {
 628         my ($dir) = @_;
 629         return (check_head_link($dir) &&
 630                 (!$export_ok || -e "$dir/$export_ok") &&
 631                 (!$export_auth_hook || $export_auth_hook->($dir)));
 632 }
 633
 634 # process alternate names for backward compatibility
 635 # filter out unsupported (unknown) snapshot formats
 636 sub filter_snapshot_fmts {
 637         my @fmts = @_;
 638
 639         @fmts = map {
 640                 exists $known_snapshot_format_aliases{$_} ?
 641                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 642         @fmts = grep {
 643                 exists $known_snapshot_formats{$_} &&
 644                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 645 }
 646
 647 # If it is set to code reference, it is code that it is to be run once per
 648 # request, allowing updating configurations that change with each request,
 649 # while running other code in config file only once.
 650 #
 651 # Otherwise, if it is false then gitweb would process config file only once;
 652 # if it is true then gitweb config would be run for each request.
 653 our $per_request_config = 1;
 654
 655 # read and parse gitweb config file given by its parameter.
 656 # returns true on success, false on recoverable error, allowing
 657 # to chain this subroutine, using first file that exists.
 658 # dies on errors during parsing config file, as it is unrecoverable.
 659 sub read_config_file {
 660         my $filename = shift;
 661         return unless defined $filename;
 662         # die if there are errors parsing config file
 663         if (-e $filename) {
 664                 do $filename;
 665                 die $@ if $@;
 666                 return 1;
 667         }
 668         return;
 669 }
 670
 671 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 672 sub evaluate_gitweb_config {
 673         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 674         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 675         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 676
 677         # Protect agains duplications of file names, to not read config twice.
 678         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 679         # there possibility of duplication of filename there doesn't matter.
 680         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 681         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 682
 683         # Common system-wide settings for convenience.
 684         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 685         read_config_file($GITWEB_CONFIG_COMMON);
 686
 687         # Use first config file that exists.  This means use the per-instance
 688         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 689         read_config_file($GITWEB_CONFIG) and return;
 690         read_config_file($GITWEB_CONFIG_SYSTEM);
 691 }
 692
 693 # Get loadavg of system, to compare against $maxload.
 694 # Currently it requires '/proc/loadavg' present to get loadavg;
 695 # if it is not present it returns 0, which means no load checking.
 696 sub get_loadavg {
 697         if( -e '/proc/loadavg' ){
 698                 open my $fd, '<', '/proc/loadavg'
 699                         or return 0;
 700                 my @load = split(/\s+/, scalar <$fd>);
 701                 close $fd;
 702
 703                 # The first three columns measure CPU and IO utilization of the last one,
 704                 # five, and 10 minute periods.  The fourth column shows the number of
 705                 # currently running processes and the total number of processes in the m/n
 706                 # format.  The last column displays the last process ID used.
 707                 return $load[0] || 0;
 708         }
 709         # additional checks for load average should go here for things that don't export
 710         # /proc/loadavg
 711
 712         return 0;
 713 }
 714
 715 # version of the core git binary
 716 our $git_version;
 717 sub evaluate_git_version {
 718         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 719         $number_of_git_cmds++;
 720 }
 721
 722 sub check_loadavg {
 723         if (defined $maxload && get_loadavg() > $maxload) {
 724                 die_error(503, "The load average on the server is too high");
 725         }
 726 }
 727
 728 # ======================================================================
 729 # input validation and dispatch
 730
 731 # input parameters can be collected from a variety of sources (presently, CGI
 732 # and PATH_INFO), so we define an %input_params hash that collects them all
 733 # together during validation: this allows subsequent uses (e.g. href()) to be
 734 # agnostic of the parameter origin
 735
 736 our %input_params = ();
 737
 738 # input parameters are stored with the long parameter name as key. This will
 739 # also be used in the href subroutine to convert parameters to their CGI
 740 # equivalent, and since the href() usage is the most frequent one, we store
 741 # the name -> CGI key mapping here, instead of the reverse.
 742 #
 743 # XXX: Warning: If you touch this, check the search form for updating,
 744 # too.
 745
 746 our @cgi_param_mapping = (
 747         project => "p",
 748         action => "a",
 749         file_name => "f",
 750         file_parent => "fp",
 751         hash => "h",
 752         hash_parent => "hp",
 753         hash_base => "hb",
 754         hash_parent_base => "hpb",
 755         page => "pg",
 756         order => "o",
 757         searchtext => "s",
 758         searchtype => "st",
 759         snapshot_format => "sf",
 760         extra_options => "opt",
 761         search_use_regexp => "sr",
 762         ctag => "by_tag",
 763         diff_style => "ds",
 764         project_filter => "pf",
 765         # this must be last entry (for manipulation from JavaScript)
 766         javascript => "js"
 767 );
 768 our %cgi_param_mapping = @cgi_param_mapping;
 769
 770 # we will also need to know the possible actions, for validation
 771 our %actions = (
 772         "blame" => \&git_blame,
 773         "blame_incremental" => \&git_blame_incremental,
 774         "blame_data" => \&git_blame_data,
 775         "blobdiff" => \&git_blobdiff,
 776         "blobdiff_plain" => \&git_blobdiff_plain,
 777         "blob" => \&git_blob,
 778         "blob_plain" => \&git_blob_plain,
 779         "commitdiff" => \&git_commitdiff,
 780         "commitdiff_plain" => \&git_commitdiff_plain,
 781         "commit" => \&git_commit,
 782         "forks" => \&git_forks,
 783         "heads" => \&git_heads,
 784         "history" => \&git_history,
 785         "log" => \&git_log,
 786         "patch" => \&git_patch,
 787         "patches" => \&git_patches,
 788         "remotes" => \&git_remotes,
 789         "rss" => \&git_rss,
 790         "atom" => \&git_atom,
 791         "search" => \&git_search,
 792         "search_help" => \&git_search_help,
 793         "shortlog" => \&git_shortlog,
 794         "summary" => \&git_summary,
 795         "tag" => \&git_tag,
 796         "tags" => \&git_tags,
 797         "tree" => \&git_tree,
 798         "snapshot" => \&git_snapshot,
 799         "object" => \&git_object,
 800         # those below don't need $project
 801         "opml" => \&git_opml,
 802         "project_list" => \&git_project_list,
 803         "project_index" => \&git_project_index,
 804 );
 805
 806 # finally, we have the hash of allowed extra_options for the commands that
 807 # allow them
 808 our %allowed_options = (
 809         "--no-merges" => [ qw(rss atom log shortlog history) ],
 810 );
 811
 812 # fill %input_params with the CGI parameters. All values except for 'opt'
 813 # should be single values, but opt can be an array. We should probably
 814 # build an array of parameters that can be multi-valued, but since for the time
 815 # being it's only this one, we just single it out
 816 sub evaluate_query_params {
 817         our $cgi;
 818
 819         while (my ($name, $symbol) = each %cgi_param_mapping) {
 820                 if ($symbol eq 'opt') {
 821                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 822                 } else {
 823                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 824                 }
 825         }
 826 }
 827
 828 # now read PATH_INFO and update the parameter list for missing parameters
 829 sub evaluate_path_info {
 830         return if defined $input_params{'project'};
 831         return if !$path_info;
 832         $path_info =~ s,^/+,,;
 833         return if !$path_info;
 834
 835         # find which part of PATH_INFO is project
 836         my $project = $path_info;
 837         $project =~ s,/+$,,;
 838         while ($project && !check_head_link("$projectroot/$project")) {
 839                 $project =~ s,/*[^/]*$,,;
 840         }
 841         return unless $project;
 842         $input_params{'project'} = $project;
 843
 844         # do not change any parameters if an action is given using the query string
 845         return if $input_params{'action'};
 846         $path_info =~ s,^\Q$project\E/*,,;
 847
 848         # next, check if we have an action
 849         my $action = $path_info;
 850         $action =~ s,/.*$,,;
 851         if (exists $actions{$action}) {
 852                 $path_info =~ s,^$action/*,,;
 853                 $input_params{'action'} = $action;
 854         }
 855
 856         # list of actions that want hash_base instead of hash, but can have no
 857         # pathname (f) parameter
 858         my @wants_base = (
 859                 'tree',
 860                 'history',
 861         );
 862
 863         # we want to catch, among others
 864         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 865         my ($parentrefname, $parentpathname, $refname, $pathname) =
 866                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 867
 868         # first, analyze the 'current' part
 869         if (defined $pathname) {
 870                 # we got "branch:filename" or "branch:dir/"
 871                 # we could use git_get_type(branch:pathname), but:
 872                 # - it needs $git_dir
 873                 # - it does a git() call
 874                 # - the convention of terminating directories with a slash
 875                 #   makes it superfluous
 876                 # - embedding the action in the PATH_INFO would make it even
 877                 #   more superfluous
 878                 $pathname =~ s,^/+,,;
 879                 if (!$pathname || substr($pathname, -1) eq "/") {
 880                         $input_params{'action'} ||= "tree";
 881                         $pathname =~ s,/$,,;
 882                 } else {
 883                         # the default action depends on whether we had parent info
 884                         # or not
 885                         if ($parentrefname) {
 886                                 $input_params{'action'} ||= "blobdiff_plain";
 887                         } else {
 888                                 $input_params{'action'} ||= "blob_plain";
 889                         }
 890                 }
 891                 $input_params{'hash_base'} ||= $refname;
 892                 $input_params{'file_name'} ||= $pathname;
 893         } elsif (defined $refname) {
 894                 # we got "branch". In this case we have to choose if we have to
 895                 # set hash or hash_base.
 896                 #
 897                 # Most of the actions without a pathname only want hash to be
 898                 # set, except for the ones specified in @wants_base that want
 899                 # hash_base instead. It should also be noted that hand-crafted
 900                 # links having 'history' as an action and no pathname or hash
 901                 # set will fail, but that happens regardless of PATH_INFO.
 902                 if (defined $parentrefname) {
 903                         # if there is parent let the default be 'shortlog' action
 904                         # (for http://git.example.com/repo.git/A..B links); if there
 905                         # is no parent, dispatch will detect type of object and set
 906                         # action appropriately if required (if action is not set)
 907                         $input_params{'action'} ||= "shortlog";
 908                 }
 909                 if ($input_params{'action'} &&
 910                     grep { $_ eq $input_params{'action'} } @wants_base) {
 911                         $input_params{'hash_base'} ||= $refname;
 912                 } else {
 913                         $input_params{'hash'} ||= $refname;
 914                 }
 915         }
 916
 917         # next, handle the 'parent' part, if present
 918         if (defined $parentrefname) {
 919                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 920                 # someproject/blobdiff/oldrev..newrev:/filename
 921                 if ($parentpathname) {
 922                         $parentpathname =~ s,^/+,,;
 923                         $parentpathname =~ s,/$,,;
 924                         $input_params{'file_parent'} ||= $parentpathname;
 925                 } else {
 926                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 927                 }
 928                 # we assume that hash_parent_base is wanted if a path was specified,
 929                 # or if the action wants hash_base instead of hash
 930                 if (defined $input_params{'file_parent'} ||
 931                         grep { $_ eq $input_params{'action'} } @wants_base) {
 932                         $input_params{'hash_parent_base'} ||= $parentrefname;
 933                 } else {
 934                         $input_params{'hash_parent'} ||= $parentrefname;
 935                 }
 936         }
 937
 938         # for the snapshot action, we allow URLs in the form
 939         # $project/snapshot/$hash.ext
 940         # where .ext determines the snapshot and gets removed from the
 941         # passed $refname to provide the $hash.
 942         #
 943         # To be able to tell that $refname includes the format extension, we
 944         # require the following two conditions to be satisfied:
 945         # - the hash input parameter MUST have been set from the $refname part
 946         #   of the URL (i.e. they must be equal)
 947         # - the snapshot format MUST NOT have been defined already (e.g. from
 948         #   CGI parameter sf)
 949         # It's also useless to try any matching unless $refname has a dot,
 950         # so we check for that too
 951         if (defined $input_params{'action'} &&
 952                 $input_params{'action'} eq 'snapshot' &&
 953                 defined $refname && index($refname, '.') != -1 &&
 954                 $refname eq $input_params{'hash'} &&
 955                 !defined $input_params{'snapshot_format'}) {
 956                 # We loop over the known snapshot formats, checking for
 957                 # extensions. Allowed extensions are both the defined suffix
 958                 # (which includes the initial dot already) and the snapshot
 959                 # format key itself, with a prepended dot
 960                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 961                         my $hash = $refname;
 962                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 963                                 next;
 964                         }
 965                         my $sfx = $1;
 966                         # a valid suffix was found, so set the snapshot format
 967                         # and reset the hash parameter
 968                         $input_params{'snapshot_format'} = $fmt;
 969                         $input_params{'hash'} = $hash;
 970                         # we also set the format suffix to the one requested
 971                         # in the URL: this way a request for e.g. .tgz returns
 972                         # a .tgz instead of a .tar.gz
 973                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 974                         last;
 975                 }
 976         }
 977 }
 978
 979 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 980      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 981      $searchtext, $search_regexp, $project_filter);
 982 sub evaluate_and_validate_params {
 983         our $action = $input_params{'action'};
 984         if (defined $action) {
 985                 if (!validate_action($action)) {
 986                         die_error(400, "Invalid action parameter");
 987                 }
 988         }
 989
 990         # parameters which are pathnames
 991         our $project = $input_params{'project'};
 992         if (defined $project) {
 993                 if (!validate_project($project)) {
 994                         undef $project;
 995                         die_error(404, "No such project");
 996                 }
 997         }
 998
 999         our $project_filter = $input_params{'project_filter'};
1000         if (defined $project_filter) {
1001                 if (!validate_pathname($project_filter)) {
1002                         die_error(404, "Invalid project_filter parameter");
1003                 }
1004         }
1005
1006         our $file_name = $input_params{'file_name'};
1007         if (defined $file_name) {
1008                 if (!validate_pathname($file_name)) {
1009                         die_error(400, "Invalid file parameter");
1010                 }
1011         }
1012
1013         our $file_parent = $input_params{'file_parent'};
1014         if (defined $file_parent) {
1015                 if (!validate_pathname($file_parent)) {
1016                         die_error(400, "Invalid file parent parameter");
1017                 }
1018         }
1019
1020         # parameters which are refnames
1021         our $hash = $input_params{'hash'};
1022         if (defined $hash) {
1023                 if (!validate_refname($hash)) {
1024                         die_error(400, "Invalid hash parameter");
1025                 }
1026         }
1027
1028         our $hash_parent = $input_params{'hash_parent'};
1029         if (defined $hash_parent) {
1030                 if (!validate_refname($hash_parent)) {
1031                         die_error(400, "Invalid hash parent parameter");
1032                 }
1033         }
1034
1035         our $hash_base = $input_params{'hash_base'};
1036         if (defined $hash_base) {
1037                 if (!validate_refname($hash_base)) {
1038                         die_error(400, "Invalid hash base parameter");
1039                 }
1040         }
1041
1042         our @extra_options = @{$input_params{'extra_options'}};
1043         # @extra_options is always defined, since it can only be (currently) set from
1044         # CGI, and $cgi->param() returns the empty array in array context if the param
1045         # is not set
1046         foreach my $opt (@extra_options) {
1047                 if (not exists $allowed_options{$opt}) {
1048                         die_error(400, "Invalid option parameter");
1049                 }
1050                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1051                         die_error(400, "Invalid option parameter for this action");
1052                 }
1053         }
1054
1055         our $hash_parent_base = $input_params{'hash_parent_base'};
1056         if (defined $hash_parent_base) {
1057                 if (!validate_refname($hash_parent_base)) {
1058                         die_error(400, "Invalid hash parent base parameter");
1059                 }
1060         }
1061
1062         # other parameters
1063         our $page = $input_params{'page'};
1064         if (defined $page) {
1065                 if ($page =~ m/[^0-9]/) {
1066                         die_error(400, "Invalid page parameter");
1067                 }
1068         }
1069
1070         our $searchtype = $input_params{'searchtype'};
1071         if (defined $searchtype) {
1072                 if ($searchtype =~ m/[^a-z]/) {
1073                         die_error(400, "Invalid searchtype parameter");
1074                 }
1075         }
1076
1077         our $search_use_regexp = $input_params{'search_use_regexp'};
1078
1079         our $searchtext = $input_params{'searchtext'};
1080         our $search_regexp;
1081         if (defined $searchtext) {
1082                 if (length($searchtext) < 2) {
1083                         die_error(403, "At least two characters are required for search parameter");
1084                 }
1085                 if ($search_use_regexp) {
1086                         $search_regexp = $searchtext;
1087                         if (!eval { qr/$search_regexp/; 1; }) {
1088                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1089                                 die_error(400, "Invalid search regexp '$search_regexp'",
1090                                           esc_html($error));
1091                         }
1092                 } else {
1093                         $search_regexp = quotemeta $searchtext;
1094                 }
1095         }
1096 }
1097
1098 # path to the current git repository
1099 our $git_dir;
1100 sub evaluate_git_dir {
1101         our $git_dir = "$projectroot/$project" if $project;
1102 }
1103
1104 our (@snapshot_fmts, $git_avatar);
1105 sub configure_gitweb_features {
1106         # list of supported snapshot formats
1107         our @snapshot_fmts = gitweb_get_feature('snapshot');
1108         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1109
1110         # check that the avatar feature is set to a known provider name,
1111         # and for each provider check if the dependencies are satisfied.
1112         # if the provider name is invalid or the dependencies are not met,
1113         # reset $git_avatar to the empty string.
1114         our ($git_avatar) = gitweb_get_feature('avatar');
1115         if ($git_avatar eq 'gravatar') {
1116                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1117         } elsif ($git_avatar eq 'picon') {
1118                 # no dependencies
1119         } else {
1120                 $git_avatar = '';
1121         }
1122 }
1123
1124 # custom error handler: 'die <message>' is Internal Server Error
1125 sub handle_errors_html {
1126         my $msg = shift; # it is already HTML escaped
1127
1128         # to avoid infinite loop where error occurs in die_error,
1129         # change handler to default handler, disabling handle_errors_html
1130         set_message("Error occured when inside die_error:\n$msg");
1131
1132         # you cannot jump out of die_error when called as error handler;
1133         # the subroutine set via CGI::Carp::set_message is called _after_
1134         # HTTP headers are already written, so it cannot write them itself
1135         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1136 }
1137 set_message(\&handle_errors_html);
1138
1139 # dispatch
1140 sub dispatch {
1141         if (!defined $action) {
1142                 if (defined $hash) {
1143                         $action = git_get_type($hash);
1144                         $action or die_error(404, "Object does not exist");
1145                 } elsif (defined $hash_base && defined $file_name) {
1146                         $action = git_get_type("$hash_base:$file_name");
1147                         $action or die_error(404, "File or directory does not exist");
1148                 } elsif (defined $project) {
1149                         $action = 'summary';
1150                 } else {
1151                         $action = 'project_list';
1152                 }
1153         }
1154         if (!defined($actions{$action})) {
1155                 die_error(400, "Unknown action");
1156         }
1157         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1158             !$project) {
1159                 die_error(400, "Project needed");
1160         }
1161         $actions{$action}->();
1162 }
1163
1164 sub reset_timer {
1165         our $t0 = [ gettimeofday() ]
1166                 if defined $t0;
1167         our $number_of_git_cmds = 0;
1168 }
1169
1170 our $first_request = 1;
1171 sub run_request {
1172         reset_timer();
1173
1174         evaluate_uri();
1175         if ($first_request) {
1176                 evaluate_gitweb_config();
1177                 evaluate_git_version();
1178         }
1179         if ($per_request_config) {
1180                 if (ref($per_request_config) eq 'CODE') {
1181                         $per_request_config->();
1182                 } elsif (!$first_request) {
1183                         evaluate_gitweb_config();
1184                 }
1185         }
1186         check_loadavg();
1187
1188         # $projectroot and $projects_list might be set in gitweb config file
1189         $projects_list ||= $projectroot;
1190
1191         evaluate_query_params();
1192         evaluate_path_info();
1193         evaluate_and_validate_params();
1194         evaluate_git_dir();
1195
1196         configure_gitweb_features();
1197
1198         dispatch();
1199 }
1200
1201 our $is_last_request = sub { 1 };
1202 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1203 our $CGI = 'CGI';
1204 our $cgi;
1205 sub configure_as_fcgi {
1206         require CGI::Fast;
1207         our $CGI = 'CGI::Fast';
1208
1209         my $request_number = 0;
1210         # let each child service 100 requests
1211         our $is_last_request = sub { ++$request_number > 100 };
1212 }
1213 sub evaluate_argv {
1214         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1215         configure_as_fcgi()
1216                 if $script_name =~ /\.fcgi$/;
1217
1218         return unless (@ARGV);
1219
1220         require Getopt::Long;
1221         Getopt::Long::GetOptions(
1222                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1223                 'nproc|n=i' => sub {
1224                         my ($arg, $val) = @_;
1225                         return unless eval { require FCGI::ProcManager; 1; };
1226                         my $proc_manager = FCGI::ProcManager->new({
1227                                 n_processes => $val,
1228                         });
1229                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1230                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1231                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1232                 },
1233         );
1234 }
1235
1236 sub run {
1237         evaluate_argv();
1238
1239         $first_request = 1;
1240         $pre_listen_hook->()
1241                 if $pre_listen_hook;
1242
1243  REQUEST:
1244         while ($cgi = $CGI->new()) {
1245                 $pre_dispatch_hook->()
1246                         if $pre_dispatch_hook;
1247
1248                 run_request();
1249
1250                 $post_dispatch_hook->()
1251                         if $post_dispatch_hook;
1252                 $first_request = 0;
1253
1254                 last REQUEST if ($is_last_request->());
1255         }
1256
1257  DONE_GITWEB:
1258         1;
1259 }
1260
1261 run();
1262
1263 if (defined caller) {
1264         # wrapped in a subroutine processing requests,
1265         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1266         return;
1267 } else {
1268         # pure CGI script, serving single request
1269         exit;
1270 }
1271
1272 ## ======================================================================
1273 ## action links
1274
1275 # possible values of extra options
1276 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1277 # -replay => 1      - start from a current view (replay with modifications)
1278 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1279 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1280 sub href {
1281         my %params = @_;
1282         # default is to use -absolute url() i.e. $my_uri
1283         my $href = $params{-full} ? $my_url : $my_uri;
1284
1285         # implicit -replay, must be first of implicit params
1286         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1287
1288         $params{'project'} = $project unless exists $params{'project'};
1289
1290         if ($params{-replay}) {
1291                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1292                         if (!exists $params{$name}) {
1293                                 $params{$name} = $input_params{$name};
1294                         }
1295                 }
1296         }
1297
1298         my $use_pathinfo = gitweb_check_feature('pathinfo');
1299         if (defined $params{'project'} &&
1300             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1301                 # try to put as many parameters as possible in PATH_INFO:
1302                 #   - project name
1303                 #   - action
1304                 #   - hash_parent or hash_parent_base:/file_parent
1305                 #   - hash or hash_base:/filename
1306                 #   - the snapshot_format as an appropriate suffix
1307
1308                 # When the script is the root DirectoryIndex for the domain,
1309                 # $href here would be something like http://gitweb.example.com/
1310                 # Thus, we strip any trailing / from $href, to spare us double
1311                 # slashes in the final URL
1312                 $href =~ s,/$,,;
1313
1314                 # Then add the project name, if present
1315                 $href .= "/".esc_path_info($params{'project'});
1316                 delete $params{'project'};
1317
1318                 # since we destructively absorb parameters, we keep this
1319                 # boolean that remembers if we're handling a snapshot
1320                 my $is_snapshot = $params{'action'} eq 'snapshot';
1321
1322                 # Summary just uses the project path URL, any other action is
1323                 # added to the URL
1324                 if (defined $params{'action'}) {
1325                         $href .= "/".esc_path_info($params{'action'})
1326                                 unless $params{'action'} eq 'summary';
1327                         delete $params{'action'};
1328                 }
1329
1330                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1331                 # stripping nonexistent or useless pieces
1332                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1333                         || $params{'hash_parent'} || $params{'hash'});
1334                 if (defined $params{'hash_base'}) {
1335                         if (defined $params{'hash_parent_base'}) {
1336                                 $href .= esc_path_info($params{'hash_parent_base'});
1337                                 # skip the file_parent if it's the same as the file_name
1338                                 if (defined $params{'file_parent'}) {
1339                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1340                                                 delete $params{'file_parent'};
1341                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1342                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1343                                                 delete $params{'file_parent'};
1344                                         }
1345                                 }
1346                                 $href .= "..";
1347                                 delete $params{'hash_parent'};
1348                                 delete $params{'hash_parent_base'};
1349                         } elsif (defined $params{'hash_parent'}) {
1350                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1351                                 delete $params{'hash_parent'};
1352                         }
1353
1354                         $href .= esc_path_info($params{'hash_base'});
1355                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1356                                 $href .= ":/".esc_path_info($params{'file_name'});
1357                                 delete $params{'file_name'};
1358                         }
1359                         delete $params{'hash'};
1360                         delete $params{'hash_base'};
1361                 } elsif (defined $params{'hash'}) {
1362                         $href .= esc_path_info($params{'hash'});
1363                         delete $params{'hash'};
1364                 }
1365
1366                 # If the action was a snapshot, we can absorb the
1367                 # snapshot_format parameter too
1368                 if ($is_snapshot) {
1369                         my $fmt = $params{'snapshot_format'};
1370                         # snapshot_format should always be defined when href()
1371                         # is called, but just in case some code forgets, we
1372                         # fall back to the default
1373                         $fmt ||= $snapshot_fmts[0];
1374                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1375                         delete $params{'snapshot_format'};
1376                 }
1377         }
1378
1379         # now encode the parameters explicitly
1380         my @result = ();
1381         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1382                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1383                 if (defined $params{$name}) {
1384                         if (ref($params{$name}) eq "ARRAY") {
1385                                 foreach my $par (@{$params{$name}}) {
1386                                         push @result, $symbol . "=" . esc_param($par);
1387                                 }
1388                         } else {
1389                                 push @result, $symbol . "=" . esc_param($params{$name});
1390                         }
1391                 }
1392         }
1393         $href .= "?" . join(';', @result) if scalar @result;
1394
1395         # final transformation: trailing spaces must be escaped (URI-encoded)
1396         $href =~ s/(\s+)$/CGI::escape($1)/e;
1397
1398         if ($params{-anchor}) {
1399                 $href .= "#".esc_param($params{-anchor});
1400         }
1401
1402         return $href;
1403 }
1404
1405
1406 ## ======================================================================
1407 ## validation, quoting/unquoting and escaping
1408
1409 sub validate_action {
1410         my $input = shift || return undef;
1411         return undef unless exists $actions{$input};
1412         return $input;
1413 }
1414
1415 sub validate_project {
1416         my $input = shift || return undef;
1417         if (!validate_pathname($input) ||
1418                 !(-d "$projectroot/$input") ||
1419                 !check_export_ok("$projectroot/$input") ||
1420                 ($strict_export && !project_in_list($input))) {
1421                 return undef;
1422         } else {
1423                 return $input;
1424         }
1425 }
1426
1427 sub validate_pathname {
1428         my $input = shift || return undef;
1429
1430         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1431         # at the beginning, at the end, and between slashes.
1432         # also this catches doubled slashes
1433         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1434                 return undef;
1435         }
1436         # no null characters
1437         if ($input =~ m!\0!) {
1438                 return undef;
1439         }
1440         return $input;
1441 }
1442
1443 sub validate_refname {
1444         my $input = shift || return undef;
1445
1446         # textual hashes are O.K.
1447         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1448                 return $input;
1449         }
1450         # it must be correct pathname
1451         $input = validate_pathname($input)
1452                 or return undef;
1453         # restrictions on ref name according to git-check-ref-format
1454         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1455                 return undef;
1456         }
1457         return $input;
1458 }
1459
1460 # decode sequences of octets in utf8 into Perl's internal form,
1461 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1462 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1463 sub to_utf8 {
1464         my $str = shift;
1465         return undef unless defined $str;
1466
1467         if (utf8::is_utf8($str) || utf8::decode($str)) {
1468                 return $str;
1469         } else {
1470                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1471         }
1472 }
1473
1474 # quote unsafe chars, but keep the slash, even when it's not
1475 # correct, but quoted slashes look too horrible in bookmarks
1476 sub esc_param {
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 # the quoting rules for path_info fragment are slightly different
1485 sub esc_path_info {
1486         my $str = shift;
1487         return undef unless defined $str;
1488
1489         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1490         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1491
1492         return $str;
1493 }
1494
1495 # quote unsafe chars in whole URL, so some characters cannot be quoted
1496 sub esc_url {
1497         my $str = shift;
1498         return undef unless defined $str;
1499         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1500         $str =~ s/ /\+/g;
1501         return $str;
1502 }
1503
1504 # quote unsafe characters in HTML attributes
1505 sub esc_attr {
1506
1507         # for XHTML conformance escaping '"' to '&quot;' is not enough
1508         return esc_html(@_);
1509 }
1510
1511 # replace invalid utf8 character with SUBSTITUTION sequence
1512 sub esc_html {
1513         my $str = shift;
1514         my %opts = @_;
1515
1516         return undef unless defined $str;
1517
1518         $str = to_utf8($str);
1519         $str = $cgi->escapeHTML($str);
1520         if ($opts{'-nbsp'}) {
1521                 $str =~ s/ /&nbsp;/g;
1522         }
1523         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1524         return $str;
1525 }
1526
1527 # quote control characters and escape filename to HTML
1528 sub esc_path {
1529         my $str = shift;
1530         my %opts = @_;
1531
1532         return undef unless defined $str;
1533
1534         $str = to_utf8($str);
1535         $str = $cgi->escapeHTML($str);
1536         if ($opts{'-nbsp'}) {
1537                 $str =~ s/ /&nbsp;/g;
1538         }
1539         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1540         return $str;
1541 }
1542
1543 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1544 sub sanitize {
1545         my $str = shift;
1546
1547         return undef unless defined $str;
1548
1549         $str = to_utf8($str);
1550         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1551         return $str;
1552 }
1553
1554 # Make control characters "printable", using character escape codes (CEC)
1555 sub quot_cec {
1556         my $cntrl = shift;
1557         my %opts = @_;
1558         my %es = ( # character escape codes, aka escape sequences
1559                 "\t" => '\t',   # tab            (HT)
1560                 "\n" => '\n',   # line feed      (LF)
1561                 "\r" => '\r',   # carrige return (CR)
1562                 "\f" => '\f',   # form feed      (FF)
1563                 "\b" => '\b',   # backspace      (BS)
1564                 "\a" => '\a',   # alarm (bell)   (BEL)
1565                 "\e" => '\e',   # escape         (ESC)
1566                 "\013" => '\v', # vertical tab   (VT)
1567                 "\000" => '\0', # nul character  (NUL)
1568         );
1569         my $chr = ( (exists $es{$cntrl})
1570                     ? $es{$cntrl}
1571                     : sprintf('\%2x', ord($cntrl)) );
1572         if ($opts{-nohtml}) {
1573                 return $chr;
1574         } else {
1575                 return "<span class=\"cntrl\">$chr</span>";
1576         }
1577 }
1578
1579 # Alternatively use unicode control pictures codepoints,
1580 # Unicode "printable representation" (PR)
1581 sub quot_upr {
1582         my $cntrl = shift;
1583         my %opts = @_;
1584
1585         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1586         if ($opts{-nohtml}) {
1587                 return $chr;
1588         } else {
1589                 return "<span class=\"cntrl\">$chr</span>";
1590         }
1591 }
1592
1593 # git may return quoted and escaped filenames
1594 sub unquote {
1595         my $str = shift;
1596
1597         sub unq {
1598                 my $seq = shift;
1599                 my %es = ( # character escape codes, aka escape sequences
1600                         't' => "\t",   # tab            (HT, TAB)
1601                         'n' => "\n",   # newline        (NL)
1602                         'r' => "\r",   # return         (CR)
1603                         'f' => "\f",   # form feed      (FF)
1604                         'b' => "\b",   # backspace      (BS)
1605                         'a' => "\a",   # alarm (bell)   (BEL)
1606                         'e' => "\e",   # escape         (ESC)
1607                         'v' => "\013", # vertical tab   (VT)
1608                 );
1609
1610                 if ($seq =~ m/^[0-7]{1,3}$/) {
1611                         # octal char sequence
1612                         return chr(oct($seq));
1613                 } elsif (exists $es{$seq}) {
1614                         # C escape sequence, aka character escape code
1615                         return $es{$seq};
1616                 }
1617                 # quoted ordinary character
1618                 return $seq;
1619         }
1620
1621         if ($str =~ m/^"(.*)"$/) {
1622                 # needs unquoting
1623                 $str = $1;
1624                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1625         }
1626         return $str;
1627 }
1628
1629 # escape tabs (convert tabs to spaces)
1630 sub untabify {
1631         my $line = shift;
1632
1633         while ((my $pos = index($line, "\t")) != -1) {
1634                 if (my $count = (8 - ($pos % 8))) {
1635                         my $spaces = ' ' x $count;
1636                         $line =~ s/\t/$spaces/;
1637                 }
1638         }
1639
1640         return $line;
1641 }
1642
1643 sub project_in_list {
1644         my $project = shift;
1645         my @list = git_get_projects_list();
1646         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1647 }
1648
1649 ## ----------------------------------------------------------------------
1650 ## HTML aware string manipulation
1651
1652 # Try to chop given string on a word boundary between position
1653 # $len and $len+$add_len. If there is no word boundary there,
1654 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1655 # (marking chopped part) would be longer than given string.
1656 sub chop_str {
1657         my $str = shift;
1658         my $len = shift;
1659         my $add_len = shift || 10;
1660         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1661
1662         # Make sure perl knows it is utf8 encoded so we don't
1663         # cut in the middle of a utf8 multibyte char.
1664         $str = to_utf8($str);
1665
1666         # allow only $len chars, but don't cut a word if it would fit in $add_len
1667         # if it doesn't fit, cut it if it's still longer than the dots we would add
1668         # remove chopped character entities entirely
1669
1670         # when chopping in the middle, distribute $len into left and right part
1671         # return early if chopping wouldn't make string shorter
1672         if ($where eq 'center') {
1673                 return $str if ($len + 5 >= length($str)); # filler is length 5
1674                 $len = int($len/2);
1675         } else {
1676                 return $str if ($len + 4 >= length($str)); # filler is length 4
1677         }
1678
1679         # regexps: ending and beginning with word part up to $add_len
1680         my $endre = qr/.{$len}\w{0,$add_len}/;
1681         my $begre = qr/\w{0,$add_len}.{$len}/;
1682
1683         if ($where eq 'left') {
1684                 $str =~ m/^(.*?)($begre)$/;
1685                 my ($lead, $body) = ($1, $2);
1686                 if (length($lead) > 4) {
1687                         $lead = " ...";
1688                 }
1689                 return "$lead$body";
1690
1691         } elsif ($where eq 'center') {
1692                 $str =~ m/^($endre)(.*)$/;
1693                 my ($left, $str)  = ($1, $2);
1694                 $str =~ m/^(.*?)($begre)$/;
1695                 my ($mid, $right) = ($1, $2);
1696                 if (length($mid) > 5) {
1697                         $mid = " ... ";
1698                 }
1699                 return "$left$mid$right";
1700
1701         } else {
1702                 $str =~ m/^($endre)(.*)$/;
1703                 my $body = $1;
1704                 my $tail = $2;
1705                 if (length($tail) > 4) {
1706                         $tail = "... ";
1707                 }
1708                 return "$body$tail";
1709         }
1710 }
1711
1712 # takes the same arguments as chop_str, but also wraps a <span> around the
1713 # result with a title attribute if it does get chopped. Additionally, the
1714 # string is HTML-escaped.
1715 sub chop_and_escape_str {
1716         my ($str) = @_;
1717
1718         my $chopped = chop_str(@_);
1719         $str = to_utf8($str);
1720         if ($chopped eq $str) {
1721                 return esc_html($chopped);
1722         } else {
1723                 $str =~ s/[[:cntrl:]]/?/g;
1724                 return $cgi->span({-title=>$str}, esc_html($chopped));
1725         }
1726 }
1727
1728 # Highlight selected fragments of string, using given CSS class,
1729 # and escape HTML.  It is assumed that fragments do not overlap.
1730 # Regions are passed as list of pairs (array references).
1731 #
1732 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1733 # '<span class="mark">foo</span>bar'
1734 sub esc_html_hl_regions {
1735         my ($str, $css_class, @sel) = @_;
1736         return esc_html($str) unless @sel;
1737
1738         my $out = '';
1739         my $pos = 0;
1740
1741         for my $s (@sel) {
1742                 my ($begin, $end) = @$s;
1743
1744                 my $escaped = esc_html(substr($str, $begin, $end - $begin));
1745
1746                 $out .= esc_html(substr($str, $pos, $begin - $pos))
1747                         if ($begin - $pos > 0);
1748                 $out .= $cgi->span({-class => $css_class}, $escaped);
1749
1750                 $pos = $end;
1751         }
1752         $out .= esc_html(substr($str, $pos))
1753                 if ($pos < length($str));
1754
1755         return $out;
1756 }
1757
1758 # return positions of beginning and end of each match
1759 sub matchpos_list {
1760         my ($str, $regexp) = @_;
1761         return unless (defined $str && defined $regexp);
1762
1763         my @matches;
1764         while ($str =~ /$regexp/g) {
1765                 push @matches, [$-[0], $+[0]];
1766         }
1767         return @matches;
1768 }
1769
1770 # highlight match (if any), and escape HTML
1771 sub esc_html_match_hl {
1772         my ($str, $regexp) = @_;
1773         return esc_html($str) unless defined $regexp;
1774
1775         my @matches = matchpos_list($str, $regexp);
1776         return esc_html($str) unless @matches;
1777
1778         return esc_html_hl_regions($str, 'match', @matches);
1779 }
1780
1781
1782 # highlight match (if any) of shortened string, and escape HTML
1783 sub esc_html_match_hl_chopped {
1784         my ($str, $chopped, $regexp) = @_;
1785         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1786
1787         my @matches = matchpos_list($str, $regexp);
1788         return esc_html($chopped) unless @matches;
1789
1790         # filter matches so that we mark chopped string
1791         my $tail = "... "; # see chop_str
1792         unless ($chopped =~ s/\Q$tail\E$//) {
1793                 $tail = '';
1794         }
1795         my $chop_len = length($chopped);
1796         my $tail_len = length($tail);
1797         my @filtered;
1798
1799         for my $m (@matches) {
1800                 if ($m->[0] > $chop_len) {
1801                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1802                         last;
1803                 } elsif ($m->[1] > $chop_len) {
1804                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1805                         last;
1806                 }
1807                 push @filtered, $m;
1808         }
1809
1810         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1811 }
1812
1813 ## ----------------------------------------------------------------------
1814 ## functions returning short strings
1815
1816 # CSS class for given age value (in seconds)
1817 sub age_class {
1818         my $age = shift;
1819
1820         if (!defined $age) {
1821                 return "noage";
1822         } elsif ($age < 60*60*2) {
1823                 return "age0";
1824         } elsif ($age < 60*60*24*2) {
1825                 return "age1";
1826         } else {
1827                 return "age2";
1828         }
1829 }
1830
1831 # convert age in seconds to "nn units ago" string
1832 sub age_string {
1833         my $age = shift;
1834         my $age_str;
1835
1836         if ($age > 60*60*24*365*2) {
1837                 $age_str = (int $age/60/60/24/365);
1838                 $age_str .= " years ago";
1839         } elsif ($age > 60*60*24*(365/12)*2) {
1840                 $age_str = int $age/60/60/24/(365/12);
1841                 $age_str .= " months ago";
1842         } elsif ($age > 60*60*24*7*2) {
1843                 $age_str = int $age/60/60/24/7;
1844                 $age_str .= " weeks ago";
1845         } elsif ($age > 60*60*24*2) {
1846                 $age_str = int $age/60/60/24;
1847                 $age_str .= " days ago";
1848         } elsif ($age > 60*60*2) {
1849                 $age_str = int $age/60/60;
1850                 $age_str .= " hours ago";
1851         } elsif ($age > 60*2) {
1852                 $age_str = int $age/60;
1853                 $age_str .= " min ago";
1854         } elsif ($age > 2) {
1855                 $age_str = int $age;
1856                 $age_str .= " sec ago";
1857         } else {
1858                 $age_str .= " right now";
1859         }
1860         return $age_str;
1861 }
1862
1863 use constant {
1864         S_IFINVALID => 0030000,
1865         S_IFGITLINK => 0160000,
1866 };
1867
1868 # submodule/subproject, a commit object reference
1869 sub S_ISGITLINK {
1870         my $mode = shift;
1871
1872         return (($mode & S_IFMT) == S_IFGITLINK)
1873 }
1874
1875 # convert file mode in octal to symbolic file mode string
1876 sub mode_str {
1877         my $mode = oct shift;
1878
1879         if (S_ISGITLINK($mode)) {
1880                 return 'm---------';
1881         } elsif (S_ISDIR($mode & S_IFMT)) {
1882                 return 'drwxr-xr-x';
1883         } elsif (S_ISLNK($mode)) {
1884                 return 'lrwxrwxrwx';
1885         } elsif (S_ISREG($mode)) {
1886                 # git cares only about the executable bit
1887                 if ($mode & S_IXUSR) {
1888                         return '-rwxr-xr-x';
1889                 } else {
1890                         return '-rw-r--r--';
1891                 };
1892         } else {
1893                 return '----------';
1894         }
1895 }
1896
1897 # convert file mode in octal to file type string
1898 sub file_type {
1899         my $mode = shift;
1900
1901         if ($mode !~ m/^[0-7]+$/) {
1902                 return $mode;
1903         } else {
1904                 $mode = oct $mode;
1905         }
1906
1907         if (S_ISGITLINK($mode)) {
1908                 return "submodule";
1909         } elsif (S_ISDIR($mode & S_IFMT)) {
1910                 return "directory";
1911         } elsif (S_ISLNK($mode)) {
1912                 return "symlink";
1913         } elsif (S_ISREG($mode)) {
1914                 return "file";
1915         } else {
1916                 return "unknown";
1917         }
1918 }
1919
1920 # convert file mode in octal to file type description string
1921 sub file_type_long {
1922         my $mode = shift;
1923
1924         if ($mode !~ m/^[0-7]+$/) {
1925                 return $mode;
1926         } else {
1927                 $mode = oct $mode;
1928         }
1929
1930         if (S_ISGITLINK($mode)) {
1931                 return "submodule";
1932         } elsif (S_ISDIR($mode & S_IFMT)) {
1933                 return "directory";
1934         } elsif (S_ISLNK($mode)) {
1935                 return "symlink";
1936         } elsif (S_ISREG($mode)) {
1937                 if ($mode & S_IXUSR) {
1938                         return "executable";
1939                 } else {
1940                         return "file";
1941                 };
1942         } else {
1943                 return "unknown";
1944         }
1945 }
1946
1947
1948 ## ----------------------------------------------------------------------
1949 ## functions returning short HTML fragments, or transforming HTML fragments
1950 ## which don't belong to other sections
1951
1952 # format line of commit message.
1953 sub format_log_line_html {
1954         my $line = shift;
1955
1956         $line = esc_html($line, -nbsp=>1);
1957         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1958                 $cgi->a({-href => href(action=>"object", hash=>$1),
1959                                         -class => "text"}, $1);
1960         }eg;
1961
1962         return $line;
1963 }
1964
1965 # format marker of refs pointing to given object
1966
1967 # the destination action is chosen based on object type and current context:
1968 # - for annotated tags, we choose the tag view unless it's the current view
1969 #   already, in which case we go to shortlog view
1970 # - for other refs, we keep the current view if we're in history, shortlog or
1971 #   log view, and select shortlog otherwise
1972 sub format_ref_marker {
1973         my ($refs, $id) = @_;
1974         my $markers = '';
1975
1976         if (defined $refs->{$id}) {
1977                 foreach my $ref (@{$refs->{$id}}) {
1978                         # this code exploits the fact that non-lightweight tags are the
1979                         # only indirect objects, and that they are the only objects for which
1980                         # we want to use tag instead of shortlog as action
1981                         my ($type, $name) = qw();
1982                         my $indirect = ($ref =~ s/\^\{\}$//);
1983                         # e.g. tags/v2.6.11 or heads/next
1984                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1985                                 $type = $1;
1986                                 $name = $2;
1987                         } else {
1988                                 $type = "ref";
1989                                 $name = $ref;
1990                         }
1991
1992                         my $class = $type;
1993                         $class .= " indirect" if $indirect;
1994
1995                         my $dest_action = "shortlog";
1996
1997                         if ($indirect) {
1998                                 $dest_action = "tag" unless $action eq "tag";
1999                         } elsif ($action =~ /^(history|(short)?log)$/) {
2000                                 $dest_action = $action;
2001                         }
2002
2003                         my $dest = "";
2004                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2005                         $dest .= $ref;
2006
2007                         my $link = $cgi->a({
2008                                 -href => href(
2009                                         action=>$dest_action,
2010                                         hash=>$dest
2011                                 )}, $name);
2012
2013                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2014                                 $link . "</span>";
2015                 }
2016         }
2017
2018         if ($markers) {
2019                 return ' <span class="refs">'. $markers . '</span>';
2020         } else {
2021                 return "";
2022         }
2023 }
2024
2025 # format, perhaps shortened and with markers, title line
2026 sub format_subject_html {
2027         my ($long, $short, $href, $extra) = @_;
2028         $extra = '' unless defined($extra);
2029
2030         if (length($short) < length($long)) {
2031                 $long =~ s/[[:cntrl:]]/?/g;
2032                 return $cgi->a({-href => $href, -class => "list subject",
2033                                 -title => to_utf8($long)},
2034                        esc_html($short)) . $extra;
2035         } else {
2036                 return $cgi->a({-href => $href, -class => "list subject"},
2037                        esc_html($long)) . $extra;
2038         }
2039 }
2040
2041 # Rather than recomputing the url for an email multiple times, we cache it
2042 # after the first hit. This gives a visible benefit in views where the avatar
2043 # for the same email is used repeatedly (e.g. shortlog).
2044 # The cache is shared by all avatar engines (currently gravatar only), which
2045 # are free to use it as preferred. Since only one avatar engine is used for any
2046 # given page, there's no risk for cache conflicts.
2047 our %avatar_cache = ();
2048
2049 # Compute the picon url for a given email, by using the picon search service over at
2050 # http://www.cs.indiana.edu/picons/search.html
2051 sub picon_url {
2052         my $email = lc shift;
2053         if (!$avatar_cache{$email}) {
2054                 my ($user, $domain) = split('@', $email);
2055                 $avatar_cache{$email} =
2056                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2057                         "$domain/$user/" .
2058                         "users+domains+unknown/up/single";
2059         }
2060         return $avatar_cache{$email};
2061 }
2062
2063 # Compute the gravatar url for a given email, if it's not in the cache already.
2064 # Gravatar stores only the part of the URL before the size, since that's the
2065 # one computationally more expensive. This also allows reuse of the cache for
2066 # different sizes (for this particular engine).
2067 sub gravatar_url {
2068         my $email = lc shift;
2069         my $size = shift;
2070         $avatar_cache{$email} ||=
2071                 "http://www.gravatar.com/avatar/" .
2072                         Digest::MD5::md5_hex($email) . "?s=";
2073         return $avatar_cache{$email} . $size;
2074 }
2075
2076 # Insert an avatar for the given $email at the given $size if the feature
2077 # is enabled.
2078 sub git_get_avatar {
2079         my ($email, %opts) = @_;
2080         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2081         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2082         $opts{-size} ||= 'default';
2083         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2084         my $url = "";
2085         if ($git_avatar eq 'gravatar') {
2086                 $url = gravatar_url($email, $size);
2087         } elsif ($git_avatar eq 'picon') {
2088                 $url = picon_url($email);
2089         }
2090         # Other providers can be added by extending the if chain, defining $url
2091         # as needed. If no variant puts something in $url, we assume avatars
2092         # are completely disabled/unavailable.
2093         if ($url) {
2094                 return $pre_white .
2095                        "<img width=\"$size\" " .
2096                             "class=\"avatar\" " .
2097                             "src=\"".esc_url($url)."\" " .
2098                             "alt=\"\" " .
2099                        "/>" . $post_white;
2100         } else {
2101                 return "";
2102         }
2103 }
2104
2105 sub format_search_author {
2106         my ($author, $searchtype, $displaytext) = @_;
2107         my $have_search = gitweb_check_feature('search');
2108
2109         if ($have_search) {
2110                 my $performed = "";
2111                 if ($searchtype eq 'author') {
2112                         $performed = "authored";
2113                 } elsif ($searchtype eq 'committer') {
2114                         $performed = "committed";
2115                 }
2116
2117                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2118                                 searchtext=>$author,
2119                                 searchtype=>$searchtype), class=>"list",
2120                                 title=>"Search for commits $performed by $author"},
2121                                 $displaytext);
2122
2123         } else {
2124                 return $displaytext;
2125         }
2126 }
2127
2128 # format the author name of the given commit with the given tag
2129 # the author name is chopped and escaped according to the other
2130 # optional parameters (see chop_str).
2131 sub format_author_html {
2132         my $tag = shift;
2133         my $co = shift;
2134         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2135         return "<$tag class=\"author\">" .
2136                format_search_author($co->{'author_name'}, "author",
2137                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2138                        $author) .
2139                "</$tag>";
2140 }
2141
2142 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2143 sub format_git_diff_header_line {
2144         my $line = shift;
2145         my $diffinfo = shift;
2146         my ($from, $to) = @_;
2147
2148         if ($diffinfo->{'nparents'}) {
2149                 # combined diff
2150                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2151                 if ($to->{'href'}) {
2152                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2153                                          esc_path($to->{'file'}));
2154                 } else { # file was deleted (no href)
2155                         $line .= esc_path($to->{'file'});
2156                 }
2157         } else {
2158                 # "ordinary" diff
2159                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2160                 if ($from->{'href'}) {
2161                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2162                                          'a/' . esc_path($from->{'file'}));
2163                 } else { # file was added (no href)
2164                         $line .= 'a/' . esc_path($from->{'file'});
2165                 }
2166                 $line .= ' ';
2167                 if ($to->{'href'}) {
2168                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2169                                          'b/' . esc_path($to->{'file'}));
2170                 } else { # file was deleted
2171                         $line .= 'b/' . esc_path($to->{'file'});
2172                 }
2173         }
2174
2175         return "<div class=\"diff header\">$line</div>\n";
2176 }
2177
2178 # format extended diff header line, before patch itself
2179 sub format_extended_diff_header_line {
2180         my $line = shift;
2181         my $diffinfo = shift;
2182         my ($from, $to) = @_;
2183
2184         # match <path>
2185         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2186                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2187                                        esc_path($from->{'file'}));
2188         }
2189         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2190                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2191                                  esc_path($to->{'file'}));
2192         }
2193         # match single <mode>
2194         if ($line =~ m/\s(\d{6})$/) {
2195                 $line .= '<span class="info"> (' .
2196                          file_type_long($1) .
2197                          ')</span>';
2198         }
2199         # match <hash>
2200         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2201                 # can match only for combined diff
2202                 $line = 'index ';
2203                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2204                         if ($from->{'href'}[$i]) {
2205                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2206                                                   -class=>"hash"},
2207                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2208                         } else {
2209                                 $line .= '0' x 7;
2210                         }
2211                         # separator
2212                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2213                 }
2214                 $line .= '..';
2215                 if ($to->{'href'}) {
2216                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2217                                          substr($diffinfo->{'to_id'},0,7));
2218                 } else {
2219                         $line .= '0' x 7;
2220                 }
2221
2222         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2223                 # can match only for ordinary diff
2224                 my ($from_link, $to_link);
2225                 if ($from->{'href'}) {
2226                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2227                                              substr($diffinfo->{'from_id'},0,7));
2228                 } else {
2229                         $from_link = '0' x 7;
2230                 }
2231                 if ($to->{'href'}) {
2232                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2233                                            substr($diffinfo->{'to_id'},0,7));
2234                 } else {
2235                         $to_link = '0' x 7;
2236                 }
2237                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2238                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2239         }
2240
2241         return $line . "<br/>\n";
2242 }
2243
2244 # format from-file/to-file diff header
2245 sub format_diff_from_to_header {
2246         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2247         my $line;
2248         my $result = '';
2249
2250         $line = $from_line;
2251         #assert($line =~ m/^---/) if DEBUG;
2252         # no extra formatting for "^--- /dev/null"
2253         if (! $diffinfo->{'nparents'}) {
2254                 # ordinary (single parent) diff
2255                 if ($line =~ m!^--- "?a/!) {
2256                         if ($from->{'href'}) {
2257                                 $line = '--- a/' .
2258                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2259                                                 esc_path($from->{'file'}));
2260                         } else {
2261                                 $line = '--- a/' .
2262                                         esc_path($from->{'file'});
2263                         }
2264                 }
2265                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2266
2267         } else {
2268                 # combined diff (merge commit)
2269                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2270                         if ($from->{'href'}[$i]) {
2271                                 $line = '--- ' .
2272                                         $cgi->a({-href=>href(action=>"blobdiff",
2273                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2274                                                              hash_parent_base=>$parents[$i],
2275                                                              file_parent=>$from->{'file'}[$i],
2276                                                              hash=>$diffinfo->{'to_id'},
2277                                                              hash_base=>$hash,
2278                                                              file_name=>$to->{'file'}),
2279                                                  -class=>"path",
2280                                                  -title=>"diff" . ($i+1)},
2281                                                 $i+1) .
2282                                         '/' .
2283                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2284                                                 esc_path($from->{'file'}[$i]));
2285                         } else {
2286                                 $line = '--- /dev/null';
2287                         }
2288                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2289                 }
2290         }
2291
2292         $line = $to_line;
2293         #assert($line =~ m/^\+\+\+/) if DEBUG;
2294         # no extra formatting for "^+++ /dev/null"
2295         if ($line =~ m!^\+\+\+ "?b/!) {
2296                 if ($to->{'href'}) {
2297                         $line = '+++ b/' .
2298                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2299                                         esc_path($to->{'file'}));
2300                 } else {
2301                         $line = '+++ b/' .
2302                                 esc_path($to->{'file'});
2303                 }
2304         }
2305         $result .= qq!<div class="diff to_file">$line</div>\n!;
2306
2307         return $result;
2308 }
2309
2310 # create note for patch simplified by combined diff
2311 sub format_diff_cc_simplified {
2312         my ($diffinfo, @parents) = @_;
2313         my $result = '';
2314
2315         $result .= "<div class=\"diff header\">" .
2316                    "diff --cc ";
2317         if (!is_deleted($diffinfo)) {
2318                 $result .= $cgi->a({-href => href(action=>"blob",
2319                                                   hash_base=>$hash,
2320                                                   hash=>$diffinfo->{'to_id'},
2321                                                   file_name=>$diffinfo->{'to_file'}),
2322                                     -class => "path"},
2323                                    esc_path($diffinfo->{'to_file'}));
2324         } else {
2325                 $result .= esc_path($diffinfo->{'to_file'});
2326         }
2327         $result .= "</div>\n" . # class="diff header"
2328                    "<div class=\"diff nodifferences\">" .
2329                    "Simple merge" .
2330                    "</div>\n"; # class="diff nodifferences"
2331
2332         return $result;
2333 }
2334
2335 sub diff_line_class {
2336         my ($line, $from, $to) = @_;
2337
2338         # ordinary diff
2339         my $num_sign = 1;
2340         # combined diff
2341         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2342                 $num_sign = scalar @{$from->{'href'}};
2343         }
2344
2345         my @diff_line_classifier = (
2346                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2347                 { regexp => qr/^\\/,               class => "incomplete"  },
2348                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2349                 # classifier for context must come before classifier add/rem,
2350                 # or we would have to use more complicated regexp, for example
2351                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2352                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2353                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2354         );
2355         for my $clsfy (@diff_line_classifier) {
2356                 return $clsfy->{'class'}
2357                         if ($line =~ $clsfy->{'regexp'});
2358         }
2359
2360         # fallback
2361         return "";
2362 }
2363
2364 # assumes that $from and $to are defined and correctly filled,
2365 # and that $line holds a line of chunk header for unified diff
2366 sub format_unidiff_chunk_header {
2367         my ($line, $from, $to) = @_;
2368
2369         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2370                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2371
2372         $from_lines = 0 unless defined $from_lines;
2373         $to_lines   = 0 unless defined $to_lines;
2374
2375         if ($from->{'href'}) {
2376                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2377                                      -class=>"list"}, $from_text);
2378         }
2379         if ($to->{'href'}) {
2380                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2381                                      -class=>"list"}, $to_text);
2382         }
2383         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2384                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2385         return $line;
2386 }
2387
2388 # assumes that $from and $to are defined and correctly filled,
2389 # and that $line holds a line of chunk header for combined diff
2390 sub format_cc_diff_chunk_header {
2391         my ($line, $from, $to) = @_;
2392
2393         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2394         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2395
2396         @from_text = split(' ', $ranges);
2397         for (my $i = 0; $i < @from_text; ++$i) {
2398                 ($from_start[$i], $from_nlines[$i]) =
2399                         (split(',', substr($from_text[$i], 1)), 0);
2400         }
2401
2402         $to_text   = pop @from_text;
2403         $to_start  = pop @from_start;
2404         $to_nlines = pop @from_nlines;
2405
2406         $line = "<span class=\"chunk_info\">$prefix ";
2407         for (my $i = 0; $i < @from_text; ++$i) {
2408                 if ($from->{'href'}[$i]) {
2409                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2410                                           -class=>"list"}, $from_text[$i]);
2411                 } else {
2412                         $line .= $from_text[$i];
2413                 }
2414                 $line .= " ";
2415         }
2416         if ($to->{'href'}) {
2417                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2418                                   -class=>"list"}, $to_text);
2419         } else {
2420                 $line .= $to_text;
2421         }
2422         $line .= " $prefix</span>" .
2423                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2424         return $line;
2425 }
2426
2427 # process patch (diff) line (not to be used for diff headers),
2428 # returning class and HTML-formatted (but not wrapped) line
2429 sub process_diff_line {
2430         my $line = shift;
2431         my ($from, $to) = @_;
2432
2433         my $diff_class = diff_line_class($line, $from, $to);
2434
2435         chomp $line;
2436         $line = untabify($line);
2437
2438         if ($from && $to && $line =~ m/^\@{2} /) {
2439                 $line = format_unidiff_chunk_header($line, $from, $to);
2440                 return $diff_class, $line;
2441
2442         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2443                 $line = format_cc_diff_chunk_header($line, $from, $to);
2444                 return $diff_class, $line;
2445
2446         }
2447         return $diff_class, esc_html($line, -nbsp=>1);
2448 }
2449
2450 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2451 # linked.  Pass the hash of the tree/commit to snapshot.
2452 sub format_snapshot_links {
2453         my ($hash) = @_;
2454         my $num_fmts = @snapshot_fmts;
2455         if ($num_fmts > 1) {
2456                 # A parenthesized list of links bearing format names.
2457                 # e.g. "snapshot (_tar.gz_ _zip_)"
2458                 return "snapshot (" . join(' ', map
2459                         $cgi->a({
2460                                 -href => href(
2461                                         action=>"snapshot",
2462                                         hash=>$hash,
2463                                         snapshot_format=>$_
2464                                 )
2465                         }, $known_snapshot_formats{$_}{'display'})
2466                 , @snapshot_fmts) . ")";
2467         } elsif ($num_fmts == 1) {
2468                 # A single "snapshot" link whose tooltip bears the format name.
2469                 # i.e. "_snapshot_"
2470                 my ($fmt) = @snapshot_fmts;
2471                 return
2472                         $cgi->a({
2473                                 -href => href(
2474                                         action=>"snapshot",
2475                                         hash=>$hash,
2476                                         snapshot_format=>$fmt
2477                                 ),
2478                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2479                         }, "snapshot");
2480         } else { # $num_fmts == 0
2481                 return undef;
2482         }
2483 }
2484
2485 ## ......................................................................
2486 ## functions returning values to be passed, perhaps after some
2487 ## transformation, to other functions; e.g. returning arguments to href()
2488
2489 # returns hash to be passed to href to generate gitweb URL
2490 # in -title key it returns description of link
2491 sub get_feed_info {
2492         my $format = shift || 'Atom';
2493         my %res = (action => lc($format));
2494
2495         # feed links are possible only for project views
2496         return unless (defined $project);
2497         # some views should link to OPML, or to generic project feed,
2498         # or don't have specific feed yet (so they should use generic)
2499         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2500
2501         my $branch;
2502         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2503         # from tag links; this also makes possible to detect branch links
2504         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2505             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2506                 $branch = $1;
2507         }
2508         # find log type for feed description (title)
2509         my $type = 'log';
2510         if (defined $file_name) {
2511                 $type  = "history of $file_name";
2512                 $type .= "/" if ($action eq 'tree');
2513                 $type .= " on '$branch'" if (defined $branch);
2514         } else {
2515                 $type = "log of $branch" if (defined $branch);
2516         }
2517
2518         $res{-title} = $type;
2519         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2520         $res{'file_name'} = $file_name;
2521
2522         return %res;
2523 }
2524
2525 ## ----------------------------------------------------------------------
2526 ## git utility subroutines, invoking git commands
2527
2528 # returns path to the core git executable and the --git-dir parameter as list
2529 sub git_cmd {
2530         $number_of_git_cmds++;
2531         return $GIT, '--git-dir='.$git_dir;
2532 }
2533
2534 # quote the given arguments for passing them to the shell
2535 # quote_command("command", "arg 1", "arg with ' and ! characters")
2536 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2537 # Try to avoid using this function wherever possible.
2538 sub quote_command {
2539         return join(' ',
2540                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2541 }
2542
2543 # get HEAD ref of given project as hash
2544 sub git_get_head_hash {
2545         return git_get_full_hash(shift, 'HEAD');
2546 }
2547
2548 sub git_get_full_hash {
2549         return git_get_hash(@_);
2550 }
2551
2552 sub git_get_short_hash {
2553         return git_get_hash(@_, '--short=7');
2554 }
2555
2556 sub git_get_hash {
2557         my ($project, $hash, @options) = @_;
2558         my $o_git_dir = $git_dir;
2559         my $retval = undef;
2560         $git_dir = "$projectroot/$project";
2561         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2562             '--verify', '-q', @options, $hash) {
2563                 $retval = <$fd>;
2564                 chomp $retval if defined $retval;
2565                 close $fd;
2566         }
2567         if (defined $o_git_dir) {
2568                 $git_dir = $o_git_dir;
2569         }
2570         return $retval;
2571 }
2572
2573 # get type of given object
2574 sub git_get_type {
2575         my $hash = shift;
2576
2577         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2578         my $type = <$fd>;
2579         close $fd or return;
2580         chomp $type;
2581         return $type;
2582 }
2583
2584 # repository configuration
2585 our $config_file = '';
2586 our %config;
2587
2588 # store multiple values for single key as anonymous array reference
2589 # single values stored directly in the hash, not as [ <value> ]
2590 sub hash_set_multi {
2591         my ($hash, $key, $value) = @_;
2592
2593         if (!exists $hash->{$key}) {
2594                 $hash->{$key} = $value;
2595         } elsif (!ref $hash->{$key}) {
2596                 $hash->{$key} = [ $hash->{$key}, $value ];
2597         } else {
2598                 push @{$hash->{$key}}, $value;
2599         }
2600 }
2601
2602 # return hash of git project configuration
2603 # optionally limited to some section, e.g. 'gitweb'
2604 sub git_parse_project_config {
2605         my $section_regexp = shift;
2606         my %config;
2607
2608         local $/ = "\0";
2609
2610         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2611                 or return;
2612
2613         while (my $keyval = <$fh>) {
2614                 chomp $keyval;
2615                 my ($key, $value) = split(/\n/, $keyval, 2);
2616
2617                 hash_set_multi(\%config, $key, $value)
2618                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2619         }
2620         close $fh;
2621
2622         return %config;
2623 }
2624
2625 # convert config value to boolean: 'true' or 'false'
2626 # no value, number > 0, 'true' and 'yes' values are true
2627 # rest of values are treated as false (never as error)
2628 sub config_to_bool {
2629         my $val = shift;
2630
2631         return 1 if !defined $val;             # section.key
2632
2633         # strip leading and trailing whitespace
2634         $val =~ s/^\s+//;
2635         $val =~ s/\s+$//;
2636
2637         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2638                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2639 }
2640
2641 # convert config value to simple decimal number
2642 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2643 # to be multiplied by 1024, 1048576, or 1073741824
2644 sub config_to_int {
2645         my $val = shift;
2646
2647         # strip leading and trailing whitespace
2648         $val =~ s/^\s+//;
2649         $val =~ s/\s+$//;
2650
2651         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2652                 $unit = lc($unit);
2653                 # unknown unit is treated as 1
2654                 return $num * ($unit eq 'g' ? 1073741824 :
2655                                $unit eq 'm' ?    1048576 :
2656                                $unit eq 'k' ?       1024 : 1);
2657         }
2658         return $val;
2659 }
2660
2661 # convert config value to array reference, if needed
2662 sub config_to_multi {
2663         my $val = shift;
2664
2665         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2666 }
2667
2668 sub git_get_project_config {
2669         my ($key, $type) = @_;
2670
2671         return unless defined $git_dir;
2672
2673         # key sanity check
2674         return unless ($key);
2675         # only subsection, if exists, is case sensitive,
2676         # and not lowercased by 'git config -z -l'
2677         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2678                 $key = join(".", lc($hi), $mi, lc($lo));
2679         } else {
2680                 $key = lc($key);
2681         }
2682         $key =~ s/^gitweb\.//;
2683         return if ($key =~ m/\W/);
2684
2685         # type sanity check
2686         if (defined $type) {
2687                 $type =~ s/^--//;
2688                 $type = undef
2689                         unless ($type eq 'bool' || $type eq 'int');
2690         }
2691
2692         # get config
2693         if (!defined $config_file ||
2694             $config_file ne "$git_dir/config") {
2695                 %config = git_parse_project_config('gitweb');
2696                 $config_file = "$git_dir/config";
2697         }
2698
2699         # check if config variable (key) exists
2700         return unless exists $config{"gitweb.$key"};
2701
2702         # ensure given type
2703         if (!defined $type) {
2704                 return $config{"gitweb.$key"};
2705         } elsif ($type eq 'bool') {
2706                 # backward compatibility: 'git config --bool' returns true/false
2707                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2708         } elsif ($type eq 'int') {
2709                 return config_to_int($config{"gitweb.$key"});
2710         }
2711         return $config{"gitweb.$key"};
2712 }
2713
2714 # get hash of given path at given ref
2715 sub git_get_hash_by_path {
2716         my $base = shift;
2717         my $path = shift || return undef;
2718         my $type = shift;
2719
2720         $path =~ s,/+$,,;
2721
2722         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2723                 or die_error(500, "Open git-ls-tree failed");
2724         my $line = <$fd>;
2725         close $fd or return undef;
2726
2727         if (!defined $line) {
2728                 # there is no tree or hash given by $path at $base
2729                 return undef;
2730         }
2731
2732         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2733         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2734         if (defined $type && $type ne $2) {
2735                 # type doesn't match
2736                 return undef;
2737         }
2738         return $3;
2739 }
2740
2741 # get path of entry with given hash at given tree-ish (ref)
2742 # used to get 'from' filename for combined diff (merge commit) for renames
2743 sub git_get_path_by_hash {
2744         my $base = shift || return;
2745         my $hash = shift || return;
2746
2747         local $/ = "\0";
2748
2749         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2750                 or return undef;
2751         while (my $line = <$fd>) {
2752                 chomp $line;
2753
2754                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2755                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2756                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2757                         close $fd;
2758                         return $1;
2759                 }
2760         }
2761         close $fd;
2762         return undef;
2763 }
2764
2765 ## ......................................................................
2766 ## git utility functions, directly accessing git repository
2767
2768 # get the value of config variable either from file named as the variable
2769 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2770 # configuration variable in the repository config file.
2771 sub git_get_file_or_project_config {
2772         my ($path, $name) = @_;
2773
2774         $git_dir = "$projectroot/$path";
2775         open my $fd, '<', "$git_dir/$name"
2776                 or return git_get_project_config($name);
2777         my $conf = <$fd>;
2778         close $fd;
2779         if (defined $conf) {
2780                 chomp $conf;
2781         }
2782         return $conf;
2783 }
2784
2785 sub git_get_project_description {
2786         my $path = shift;
2787         return git_get_file_or_project_config($path, 'description');
2788 }
2789
2790 sub git_get_project_category {
2791         my $path = shift;
2792         return git_get_file_or_project_config($path, 'category');
2793 }
2794
2795
2796 # supported formats:
2797 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2798 #   - if its contents is a number, use it as tag weight,
2799 #   - otherwise add a tag with weight 1
2800 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2801 #   the same value multiple times increases tag weight
2802 # * `gitweb.ctag' multi-valued repo config variable
2803 sub git_get_project_ctags {
2804         my $project = shift;
2805         my $ctags = {};
2806
2807         $git_dir = "$projectroot/$project";
2808         if (opendir my $dh, "$git_dir/ctags") {
2809                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2810                 foreach my $tagfile (@files) {
2811                         open my $ct, '<', $tagfile
2812                                 or next;
2813                         my $val = <$ct>;
2814                         chomp $val if $val;
2815                         close $ct;
2816
2817                         (my $ctag = $tagfile) =~ s#.*/##;
2818                         if ($val =~ /^\d+$/) {
2819                                 $ctags->{$ctag} = $val;
2820                         } else {
2821                                 $ctags->{$ctag} = 1;
2822                         }
2823                 }
2824                 closedir $dh;
2825
2826         } elsif (open my $fh, '<', "$git_dir/ctags") {
2827                 while (my $line = <$fh>) {
2828                         chomp $line;
2829                         $ctags->{$line}++ if $line;
2830                 }
2831                 close $fh;
2832
2833         } else {
2834                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2835                 foreach my $tag (@$taglist) {
2836                         $ctags->{$tag}++;
2837                 }
2838         }
2839
2840         return $ctags;
2841 }
2842
2843 # return hash, where keys are content tags ('ctags'),
2844 # and values are sum of weights of given tag in every project
2845 sub git_gather_all_ctags {
2846         my $projects = shift;
2847         my $ctags = {};
2848
2849         foreach my $p (@$projects) {
2850                 foreach my $ct (keys %{$p->{'ctags'}}) {
2851                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2852                 }
2853         }
2854
2855         return $ctags;
2856 }
2857
2858 sub git_populate_project_tagcloud {
2859         my $ctags = shift;
2860
2861         # First, merge different-cased tags; tags vote on casing
2862         my %ctags_lc;
2863         foreach (keys %$ctags) {
2864                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2865                 if (not $ctags_lc{lc $_}->{topcount}
2866                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2867                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2868                         $ctags_lc{lc $_}->{topname} = $_;
2869                 }
2870         }
2871
2872         my $cloud;
2873         my $matched = $input_params{'ctag'};
2874         if (eval { require HTML::TagCloud; 1; }) {
2875                 $cloud = HTML::TagCloud->new;
2876                 foreach my $ctag (sort keys %ctags_lc) {
2877                         # Pad the title with spaces so that the cloud looks
2878                         # less crammed.
2879                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2880                         $title =~ s/ /&nbsp;/g;
2881                         $title =~ s/^/&nbsp;/g;
2882                         $title =~ s/$/&nbsp;/g;
2883                         if (defined $matched && $matched eq $ctag) {
2884                                 $title = qq(<span class="match">$title</span>);
2885                         }
2886                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2887                                     $ctags_lc{$ctag}->{count});
2888                 }
2889         } else {
2890                 $cloud = {};
2891                 foreach my $ctag (keys %ctags_lc) {
2892                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2893                         if (defined $matched && $matched eq $ctag) {
2894                                 $title = qq(<span class="match">$title</span>);
2895                         }
2896                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2897                         $cloud->{$ctag}{ctag} =
2898                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2899                 }
2900         }
2901         return $cloud;
2902 }
2903
2904 sub git_show_project_tagcloud {
2905         my ($cloud, $count) = @_;
2906         if (ref $cloud eq 'HTML::TagCloud') {
2907                 return $cloud->html_and_css($count);
2908         } else {
2909                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2910                 return
2911                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2912                         join (', ', map {
2913                                 $cloud->{$_}->{'ctag'}
2914                         } splice(@tags, 0, $count)) .
2915                         '</div>';
2916         }
2917 }
2918
2919 sub git_get_project_url_list {
2920         my $path = shift;
2921
2922         $git_dir = "$projectroot/$path";
2923         open my $fd, '<', "$git_dir/cloneurl"
2924                 or return wantarray ?
2925                 @{ config_to_multi(git_get_project_config('url')) } :
2926                    config_to_multi(git_get_project_config('url'));
2927         my @git_project_url_list = map { chomp; $_ } <$fd>;
2928         close $fd;
2929
2930         return wantarray ? @git_project_url_list : \@git_project_url_list;
2931 }
2932
2933 sub git_get_projects_list {
2934         my $filter = shift || '';
2935         my $paranoid = shift;
2936         my @list;
2937
2938         if (-d $projects_list) {
2939                 # search in directory
2940                 my $dir = $projects_list;
2941                 # remove the trailing "/"
2942                 $dir =~ s!/+$!!;
2943                 my $pfxlen = length("$dir");
2944                 my $pfxdepth = ($dir =~ tr!/!!);
2945                 # when filtering, search only given subdirectory
2946                 if ($filter && !$paranoid) {
2947                         $dir .= "/$filter";
2948                         $dir =~ s!/+$!!;
2949                 }
2950
2951                 File::Find::find({
2952                         follow_fast => 1, # follow symbolic links
2953                         follow_skip => 2, # ignore duplicates
2954                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2955                         wanted => sub {
2956                                 # global variables
2957                                 our $project_maxdepth;
2958                                 our $projectroot;
2959                                 # skip project-list toplevel, if we get it.
2960                                 return if (m!^[/.]$!);
2961                                 # only directories can be git repositories
2962                                 return unless (-d $_);
2963                                 # don't traverse too deep (Find is super slow on os x)
2964                                 # $project_maxdepth excludes depth of $projectroot
2965                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2966                                         $File::Find::prune = 1;
2967                                         return;
2968                                 }
2969
2970                                 my $path = substr($File::Find::name, $pfxlen + 1);
2971                                 # paranoidly only filter here
2972                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2973                                         next;
2974                                 }
2975                                 # we check related file in $projectroot
2976                                 if (check_export_ok("$projectroot/$path")) {
2977                                         push @list, { path => $path };
2978                                         $File::Find::prune = 1;
2979                                 }
2980                         },
2981                 }, "$dir");
2982
2983         } elsif (-f $projects_list) {
2984                 # read from file(url-encoded):
2985                 # 'git%2Fgit.git Linus+Torvalds'
2986                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2987                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2988                 open my $fd, '<', $projects_list or return;
2989         PROJECT:
2990                 while (my $line = <$fd>) {
2991                         chomp $line;
2992                         my ($path, $owner) = split ' ', $line;
2993                         $path = unescape($path);
2994                         $owner = unescape($owner);
2995                         if (!defined $path) {
2996                                 next;
2997                         }
2998                         # if $filter is rpovided, check if $path begins with $filter
2999                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3000                                 next;
3001                         }
3002                         if (check_export_ok("$projectroot/$path")) {
3003                                 my $pr = {
3004                                         path => $path,
3005                                         owner => to_utf8($owner),
3006                                 };
3007                                 push @list, $pr;
3008                         }
3009                 }
3010                 close $fd;
3011         }
3012         return @list;
3013 }
3014
3015 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3016 # as side effects it sets 'forks' field to list of forks for forked projects
3017 sub filter_forks_from_projects_list {
3018         my $projects = shift;
3019
3020         my %trie; # prefix tree of directories (path components)
3021         # generate trie out of those directories that might contain forks
3022         foreach my $pr (@$projects) {
3023                 my $path = $pr->{'path'};
3024                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3025                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3026                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3027                 next unless (-d "$projectroot/$path"); # containing directory exists
3028                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3029
3030                 # add to trie
3031                 my @dirs = split('/', $path);
3032                 # walk the trie, until either runs out of components or out of trie
3033                 my $ref = \%trie;
3034                 while (scalar @dirs &&
3035                        exists($ref->{$dirs[0]})) {
3036                         $ref = $ref->{shift @dirs};
3037                 }
3038                 # create rest of trie structure from rest of components
3039                 foreach my $dir (@dirs) {
3040                         $ref = $ref->{$dir} = {};
3041                 }
3042                 # create end marker, store $pr as a data
3043                 $ref->{''} = $pr if (!exists $ref->{''});
3044         }
3045
3046         # filter out forks, by finding shortest prefix match for paths
3047         my @filtered;
3048  PROJECT:
3049         foreach my $pr (@$projects) {
3050                 # trie lookup
3051                 my $ref = \%trie;
3052         DIR:
3053                 foreach my $dir (split('/', $pr->{'path'})) {
3054                         if (exists $ref->{''}) {
3055                                 # found [shortest] prefix, is a fork - skip it
3056                                 push @{$ref->{''}{'forks'}}, $pr;
3057                                 next PROJECT;
3058                         }
3059                         if (!exists $ref->{$dir}) {
3060                                 # not in trie, cannot have prefix, not a fork
3061                                 push @filtered, $pr;
3062                                 next PROJECT;
3063                         }
3064                         # If the dir is there, we just walk one step down the trie.
3065                         $ref = $ref->{$dir};
3066                 }
3067                 # we ran out of trie
3068                 # (shouldn't happen: it's either no match, or end marker)
3069                 push @filtered, $pr;
3070         }
3071
3072         return @filtered;
3073 }
3074
3075 # note: fill_project_list_info must be run first,
3076 # for 'descr_long' and 'ctags' to be filled
3077 sub search_projects_list {
3078         my ($projlist, %opts) = @_;
3079         my $tagfilter  = $opts{'tagfilter'};
3080         my $search_re = $opts{'search_regexp'};
3081
3082         return @$projlist
3083                 unless ($tagfilter || $search_re);
3084
3085         # searching projects require filling to be run before it;
3086         fill_project_list_info($projlist,
3087                                $tagfilter  ? 'ctags' : (),
3088                                $search_re ? ('path', 'descr') : ());
3089         my @projects;
3090  PROJECT:
3091         foreach my $pr (@$projlist) {
3092
3093                 if ($tagfilter) {
3094                         next unless ref($pr->{'ctags'}) eq 'HASH';
3095                         next unless
3096                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3097                 }
3098
3099                 if ($search_re) {
3100                         next unless
3101                                 $pr->{'path'} =~ /$search_re/ ||
3102                                 $pr->{'descr_long'} =~ /$search_re/;
3103                 }
3104
3105                 push @projects, $pr;
3106         }
3107
3108         return @projects;
3109 }
3110
3111 our $gitweb_project_owner = undef;
3112 sub git_get_project_list_from_file {
3113
3114         return if (defined $gitweb_project_owner);
3115
3116         $gitweb_project_owner = {};
3117         # read from file (url-encoded):
3118         # 'git%2Fgit.git Linus+Torvalds'
3119         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3120         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3121         if (-f $projects_list) {
3122                 open(my $fd, '<', $projects_list);
3123                 while (my $line = <$fd>) {
3124                         chomp $line;
3125                         my ($pr, $ow) = split ' ', $line;
3126                         $pr = unescape($pr);
3127                         $ow = unescape($ow);
3128                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3129                 }
3130                 close $fd;
3131         }
3132 }
3133
3134 sub git_get_project_owner {
3135         my $project = shift;
3136         my $owner;
3137
3138         return undef unless $project;
3139         $git_dir = "$projectroot/$project";
3140
3141         if (!defined $gitweb_project_owner) {
3142                 git_get_project_list_from_file();
3143         }
3144
3145         if (exists $gitweb_project_owner->{$project}) {
3146                 $owner = $gitweb_project_owner->{$project};
3147         }
3148         if (!defined $owner){
3149                 $owner = git_get_project_config('owner');
3150         }
3151         if (!defined $owner) {
3152                 $owner = get_file_owner("$git_dir");
3153         }
3154
3155         return $owner;
3156 }
3157
3158 sub git_get_last_activity {
3159         my ($path) = @_;
3160         my $fd;
3161
3162         $git_dir = "$projectroot/$path";
3163         open($fd, "-|", git_cmd(), 'for-each-ref',
3164              '--format=%(committer)',
3165              '--sort=-committerdate',
3166              '--count=1',
3167              'refs/heads') or return;
3168         my $most_recent = <$fd>;
3169         close $fd or return;
3170         if (defined $most_recent &&
3171             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3172                 my $timestamp = $1;
3173                 my $age = time - $timestamp;
3174                 return ($age, age_string($age));
3175         }
3176         return (undef, undef);
3177 }
3178
3179 # Implementation note: when a single remote is wanted, we cannot use 'git
3180 # remote show -n' because that command always work (assuming it's a remote URL
3181 # if it's not defined), and we cannot use 'git remote show' because that would
3182 # try to make a network roundtrip. So the only way to find if that particular
3183 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3184 # and when we find what we want.
3185 sub git_get_remotes_list {
3186         my $wanted = shift;
3187         my %remotes = ();
3188
3189         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3190         return unless $fd;
3191         while (my $remote = <$fd>) {
3192                 chomp $remote;
3193                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3194                 next if $wanted and not $remote eq $wanted;
3195                 my ($url, $key) = ($1, $2);
3196
3197                 $remotes{$remote} ||= { 'heads' => () };
3198                 $remotes{$remote}{$key} = $url;
3199         }
3200         close $fd or return;
3201         return wantarray ? %remotes : \%remotes;
3202 }
3203
3204 # Takes a hash of remotes as first parameter and fills it by adding the
3205 # available remote heads for each of the indicated remotes.
3206 sub fill_remote_heads {
3207         my $remotes = shift;
3208         my @heads = map { "remotes/$_" } keys %$remotes;
3209         my @remoteheads = git_get_heads_list(undef, @heads);
3210         foreach my $remote (keys %$remotes) {
3211                 $remotes->{$remote}{'heads'} = [ grep {
3212                         $_->{'name'} =~ s!^$remote/!!
3213                         } @remoteheads ];
3214         }
3215 }
3216
3217 sub git_get_references {
3218         my $type = shift || "";
3219         my %refs;
3220         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3221         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3222         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3223                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3224                 or return;
3225
3226         while (my $line = <$fd>) {
3227                 chomp $line;
3228                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3229                         if (defined $refs{$1}) {
3230                                 push @{$refs{$1}}, $2;
3231                         } else {
3232                                 $refs{$1} = [ $2 ];
3233                         }
3234                 }
3235         }
3236         close $fd or return;
3237         return \%refs;
3238 }
3239
3240 sub git_get_rev_name_tags {
3241         my $hash = shift || return undef;
3242
3243         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3244                 or return;
3245         my $name_rev = <$fd>;
3246         close $fd;
3247
3248         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3249                 return $1;
3250         } else {
3251                 # catches also '$hash undefined' output
3252                 return undef;
3253         }
3254 }
3255
3256 ## ----------------------------------------------------------------------
3257 ## parse to hash functions
3258
3259 sub parse_date {
3260         my $epoch = shift;
3261         my $tz = shift || "-0000";
3262
3263         my %date;
3264         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3265         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3266         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3267         $date{'hour'} = $hour;
3268         $date{'minute'} = $min;
3269         $date{'mday'} = $mday;
3270         $date{'day'} = $days[$wday];
3271         $date{'month'} = $months[$mon];
3272         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3273                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3274         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3275                              $mday, $months[$mon], $hour ,$min;
3276         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3277                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3278
3279         my ($tz_sign, $tz_hour, $tz_min) =
3280                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3281         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3282         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3283         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3284         $date{'hour_local'} = $hour;
3285         $date{'minute_local'} = $min;
3286         $date{'tz_local'} = $tz;
3287         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3288                                   1900+$year, $mon+1, $mday,
3289                                   $hour, $min, $sec, $tz);
3290         return %date;
3291 }
3292
3293 sub parse_tag {
3294         my $tag_id = shift;
3295         my %tag;
3296         my @comment;
3297
3298         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3299         $tag{'id'} = $tag_id;
3300         while (my $line = <$fd>) {
3301                 chomp $line;
3302                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3303                         $tag{'object'} = $1;
3304                 } elsif ($line =~ m/^type (.+)$/) {
3305                         $tag{'type'} = $1;
3306                 } elsif ($line =~ m/^tag (.+)$/) {
3307                         $tag{'name'} = $1;
3308                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3309                         $tag{'author'} = $1;
3310                         $tag{'author_epoch'} = $2;
3311                         $tag{'author_tz'} = $3;
3312                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3313                                 $tag{'author_name'}  = $1;
3314                                 $tag{'author_email'} = $2;
3315                         } else {
3316                                 $tag{'author_name'} = $tag{'author'};
3317                         }
3318                 } elsif ($line =~ m/--BEGIN/) {
3319                         push @comment, $line;
3320                         last;
3321                 } elsif ($line eq "") {
3322                         last;
3323                 }
3324         }
3325         push @comment, <$fd>;
3326         $tag{'comment'} = \@comment;
3327         close $fd or return;
3328         if (!defined $tag{'name'}) {
3329                 return
3330         };
3331         return %tag
3332 }
3333
3334 sub parse_commit_text {
3335         my ($commit_text, $withparents) = @_;
3336         my @commit_lines = split '\n', $commit_text;
3337         my %co;
3338
3339         pop @commit_lines; # Remove '\0'
3340
3341         if (! @commit_lines) {
3342                 return;
3343         }
3344
3345         my $header = shift @commit_lines;
3346         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3347                 return;
3348         }
3349         ($co{'id'}, my @parents) = split ' ', $header;
3350         while (my $line = shift @commit_lines) {
3351                 last if $line eq "\n";
3352                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3353                         $co{'tree'} = $1;
3354                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3355                         push @parents, $1;
3356                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3357                         $co{'author'} = to_utf8($1);
3358                         $co{'author_epoch'} = $2;
3359                         $co{'author_tz'} = $3;
3360                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3361                                 $co{'author_name'}  = $1;
3362                                 $co{'author_email'} = $2;
3363                         } else {
3364                                 $co{'author_name'} = $co{'author'};
3365                         }
3366                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3367                         $co{'committer'} = to_utf8($1);
3368                         $co{'committer_epoch'} = $2;
3369                         $co{'committer_tz'} = $3;
3370                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3371                                 $co{'committer_name'}  = $1;
3372                                 $co{'committer_email'} = $2;
3373                         } else {
3374                                 $co{'committer_name'} = $co{'committer'};
3375                         }
3376                 }
3377         }
3378         if (!defined $co{'tree'}) {
3379                 return;
3380         };
3381         $co{'parents'} = \@parents;
3382         $co{'parent'} = $parents[0];
3383
3384         foreach my $title (@commit_lines) {
3385                 $title =~ s/^    //;
3386                 if ($title ne "") {
3387                         $co{'title'} = chop_str($title, 80, 5);
3388                         # remove leading stuff of merges to make the interesting part visible
3389                         if (length($title) > 50) {
3390                                 $title =~ s/^Automatic //;
3391                                 $title =~ s/^merge (of|with) /Merge ... /i;
3392                                 if (length($title) > 50) {
3393                                         $title =~ s/(http|rsync):\/\///;
3394                                 }
3395                                 if (length($title) > 50) {
3396                                         $title =~ s/(master|www|rsync)\.//;
3397                                 }
3398                                 if (length($title) > 50) {
3399                                         $title =~ s/kernel.org:?//;
3400                                 }
3401                                 if (length($title) > 50) {
3402                                         $title =~ s/\/pub\/scm//;
3403                                 }
3404                         }
3405                         $co{'title_short'} = chop_str($title, 50, 5);
3406                         last;
3407                 }
3408         }
3409         if (! defined $co{'title'} || $co{'title'} eq "") {
3410                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3411         }
3412         # remove added spaces
3413         foreach my $line (@commit_lines) {
3414                 $line =~ s/^    //;
3415         }
3416         $co{'comment'} = \@commit_lines;
3417
3418         my $age = time - $co{'committer_epoch'};
3419         $co{'age'} = $age;
3420         $co{'age_string'} = age_string($age);
3421         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3422         if ($age > 60*60*24*7*2) {
3423                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3424                 $co{'age_string_age'} = $co{'age_string'};
3425         } else {
3426                 $co{'age_string_date'} = $co{'age_string'};
3427                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3428         }
3429         return %co;
3430 }
3431
3432 sub parse_commit {
3433         my ($commit_id) = @_;
3434         my %co;
3435
3436         local $/ = "\0";
3437
3438         open my $fd, "-|", git_cmd(), "rev-list",
3439                 "--parents",
3440                 "--header",
3441                 "--max-count=1",
3442                 $commit_id,
3443                 "--",
3444                 or die_error(500, "Open git-rev-list failed");
3445         %co = parse_commit_text(<$fd>, 1);
3446         close $fd;
3447
3448         return %co;
3449 }
3450
3451 sub parse_commits {
3452         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3453         my @cos;
3454
3455         $maxcount ||= 1;
3456         $skip ||= 0;
3457
3458         local $/ = "\0";
3459
3460         open my $fd, "-|", git_cmd(), "rev-list",
3461                 "--header",
3462                 @args,
3463                 ("--max-count=" . $maxcount),
3464                 ("--skip=" . $skip),
3465                 @extra_options,
3466                 $commit_id,
3467                 "--",
3468                 ($filename ? ($filename) : ())
3469                 or die_error(500, "Open git-rev-list failed");
3470         while (my $line = <$fd>) {
3471                 my %co = parse_commit_text($line);
3472                 push @cos, \%co;
3473         }
3474         close $fd;
3475
3476         return wantarray ? @cos : \@cos;
3477 }
3478
3479 # parse line of git-diff-tree "raw" output
3480 sub parse_difftree_raw_line {
3481         my $line = shift;
3482         my %res;
3483
3484         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3485         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3486         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3487                 $res{'from_mode'} = $1;
3488                 $res{'to_mode'} = $2;
3489                 $res{'from_id'} = $3;
3490                 $res{'to_id'} = $4;
3491                 $res{'status'} = $5;
3492                 $res{'similarity'} = $6;
3493                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3494                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3495                 } else {
3496                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3497                 }
3498         }
3499         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3500         # combined diff (for merge commit)
3501         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3502                 $res{'nparents'}  = length($1);
3503                 $res{'from_mode'} = [ split(' ', $2) ];
3504                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3505                 $res{'from_id'} = [ split(' ', $3) ];
3506                 $res{'to_id'} = pop @{$res{'from_id'}};
3507                 $res{'status'} = [ split('', $4) ];
3508                 $res{'to_file'} = unquote($5);
3509         }
3510         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3511         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3512                 $res{'commit'} = $1;
3513         }
3514
3515         return wantarray ? %res : \%res;
3516 }
3517
3518 # wrapper: return parsed line of git-diff-tree "raw" output
3519 # (the argument might be raw line, or parsed info)
3520 sub parsed_difftree_line {
3521         my $line_or_ref = shift;
3522
3523         if (ref($line_or_ref) eq "HASH") {
3524                 # pre-parsed (or generated by hand)
3525                 return $line_or_ref;
3526         } else {
3527                 return parse_difftree_raw_line($line_or_ref);
3528         }
3529 }
3530
3531 # parse line of git-ls-tree output
3532 sub parse_ls_tree_line {
3533         my $line = shift;
3534         my %opts = @_;
3535         my %res;
3536
3537         if ($opts{'-l'}) {
3538                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3539                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3540
3541                 $res{'mode'} = $1;
3542                 $res{'type'} = $2;
3543                 $res{'hash'} = $3;
3544                 $res{'size'} = $4;
3545                 if ($opts{'-z'}) {
3546                         $res{'name'} = $5;
3547                 } else {
3548                         $res{'name'} = unquote($5);
3549                 }
3550         } else {
3551                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3552                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3553
3554                 $res{'mode'} = $1;
3555                 $res{'type'} = $2;
3556                 $res{'hash'} = $3;
3557                 if ($opts{'-z'}) {
3558                         $res{'name'} = $4;
3559                 } else {
3560                         $res{'name'} = unquote($4);
3561                 }
3562         }
3563
3564         return wantarray ? %res : \%res;
3565 }
3566
3567 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3568 sub parse_from_to_diffinfo {
3569         my ($diffinfo, $from, $to, @parents) = @_;
3570
3571         if ($diffinfo->{'nparents'}) {
3572                 # combined diff
3573                 $from->{'file'} = [];
3574                 $from->{'href'} = [];
3575                 fill_from_file_info($diffinfo, @parents)
3576                         unless exists $diffinfo->{'from_file'};
3577                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3578                         $from->{'file'}[$i] =
3579                                 defined $diffinfo->{'from_file'}[$i] ?
3580                                         $diffinfo->{'from_file'}[$i] :
3581                                         $diffinfo->{'to_file'};
3582                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3583                                 $from->{'href'}[$i] = href(action=>"blob",
3584                                                            hash_base=>$parents[$i],
3585                                                            hash=>$diffinfo->{'from_id'}[$i],
3586                                                            file_name=>$from->{'file'}[$i]);
3587                         } else {
3588                                 $from->{'href'}[$i] = undef;
3589                         }
3590                 }
3591         } else {
3592                 # ordinary (not combined) diff
3593                 $from->{'file'} = $diffinfo->{'from_file'};
3594                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3595                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3596                                                hash=>$diffinfo->{'from_id'},
3597                                                file_name=>$from->{'file'});
3598                 } else {
3599                         delete $from->{'href'};
3600                 }
3601         }
3602
3603         $to->{'file'} = $diffinfo->{'to_file'};
3604         if (!is_deleted($diffinfo)) { # file exists in result
3605                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3606                                      hash=>$diffinfo->{'to_id'},
3607                                      file_name=>$to->{'file'});
3608         } else {
3609                 delete $to->{'href'};
3610         }
3611 }
3612
3613 ## ......................................................................
3614 ## parse to array of hashes functions
3615
3616 sub git_get_heads_list {
3617         my ($limit, @classes) = @_;
3618         @classes = ('heads') unless @classes;
3619         my @patterns = map { "refs/$_" } @classes;
3620         my @headslist;
3621
3622         open my $fd, '-|', git_cmd(), 'for-each-ref',
3623                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3624                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3625                 @patterns
3626                 or return;
3627         while (my $line = <$fd>) {
3628                 my %ref_item;
3629
3630                 chomp $line;
3631                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3632                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3633                 my ($committer, $epoch, $tz) =
3634                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3635                 $ref_item{'fullname'}  = $name;
3636                 $name =~ s!^refs/(?:head|remote)s/!!;
3637
3638                 $ref_item{'name'}  = $name;
3639                 $ref_item{'id'}    = $hash;
3640                 $ref_item{'title'} = $title || '(no commit message)';
3641                 $ref_item{'epoch'} = $epoch;
3642                 if ($epoch) {
3643                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3644                 } else {
3645                         $ref_item{'age'} = "unknown";
3646                 }
3647
3648                 push @headslist, \%ref_item;
3649         }
3650         close $fd;
3651
3652         return wantarray ? @headslist : \@headslist;
3653 }
3654
3655 sub git_get_tags_list {
3656         my $limit = shift;
3657         my @tagslist;
3658
3659         open my $fd, '-|', git_cmd(), 'for-each-ref',
3660                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3661                 '--format=%(objectname) %(objecttype) %(refname) '.
3662                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3663                 'refs/tags'
3664                 or return;
3665         while (my $line = <$fd>) {
3666                 my %ref_item;
3667
3668                 chomp $line;
3669                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3670                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3671                 my ($creator, $epoch, $tz) =
3672                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3673                 $ref_item{'fullname'} = $name;
3674                 $name =~ s!^refs/tags/!!;
3675
3676                 $ref_item{'type'} = $type;
3677                 $ref_item{'id'} = $id;
3678                 $ref_item{'name'} = $name;
3679                 if ($type eq "tag") {
3680                         $ref_item{'subject'} = $title;
3681                         $ref_item{'reftype'} = $reftype;
3682                         $ref_item{'refid'}   = $refid;
3683                 } else {
3684                         $ref_item{'reftype'} = $type;
3685                         $ref_item{'refid'}   = $id;
3686                 }
3687
3688                 if ($type eq "tag" || $type eq "commit") {
3689                         $ref_item{'epoch'} = $epoch;
3690                         if ($epoch) {
3691                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3692                         } else {
3693                                 $ref_item{'age'} = "unknown";
3694                         }
3695                 }
3696
3697                 push @tagslist, \%ref_item;
3698         }
3699         close $fd;
3700
3701         return wantarray ? @tagslist : \@tagslist;
3702 }
3703
3704 ## ----------------------------------------------------------------------
3705 ## filesystem-related functions
3706
3707 sub get_file_owner {
3708         my $path = shift;
3709
3710         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3711         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3712         if (!defined $gcos) {
3713                 return undef;
3714         }
3715         my $owner = $gcos;
3716         $owner =~ s/[,;].*$//;
3717         return to_utf8($owner);
3718 }
3719
3720 # assume that file exists
3721 sub insert_file {
3722         my $filename = shift;
3723
3724         open my $fd, '<', $filename;
3725         print map { to_utf8($_) } <$fd>;
3726         close $fd;
3727 }
3728
3729 ## ......................................................................
3730 ## mimetype related functions
3731
3732 sub mimetype_guess_file {
3733         my $filename = shift;
3734         my $mimemap = shift;
3735         -r $mimemap or return undef;
3736
3737         my %mimemap;
3738         open(my $mh, '<', $mimemap) or return undef;
3739         while (<$mh>) {
3740                 next if m/^#/; # skip comments
3741                 my ($mimetype, @exts) = split(/\s+/);
3742                 foreach my $ext (@exts) {
3743                         $mimemap{$ext} = $mimetype;
3744                 }
3745         }
3746         close($mh);
3747
3748         $filename =~ /\.([^.]*)$/;
3749         return $mimemap{$1};
3750 }
3751
3752 sub mimetype_guess {
3753         my $filename = shift;
3754         my $mime;
3755         $filename =~ /\./ or return undef;
3756
3757         if ($mimetypes_file) {
3758                 my $file = $mimetypes_file;
3759                 if ($file !~ m!^/!) { # if it is relative path
3760                         # it is relative to project
3761                         $file = "$projectroot/$project/$file";
3762                 }
3763                 $mime = mimetype_guess_file($filename, $file);
3764         }
3765         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3766         return $mime;
3767 }
3768
3769 sub blob_mimetype {
3770         my $fd = shift;
3771         my $filename = shift;
3772
3773         if ($filename) {
3774                 my $mime = mimetype_guess($filename);
3775                 $mime and return $mime;
3776         }
3777
3778         # just in case
3779         return $default_blob_plain_mimetype unless $fd;
3780
3781         if (-T $fd) {
3782                 return 'text/plain';
3783         } elsif (! $filename) {
3784                 return 'application/octet-stream';
3785         } elsif ($filename =~ m/\.png$/i) {
3786                 return 'image/png';
3787         } elsif ($filename =~ m/\.gif$/i) {
3788                 return 'image/gif';
3789         } elsif ($filename =~ m/\.jpe?g$/i) {
3790                 return 'image/jpeg';
3791         } else {
3792                 return 'application/octet-stream';
3793         }
3794 }
3795
3796 sub blob_contenttype {
3797         my ($fd, $file_name, $type) = @_;
3798
3799         $type ||= blob_mimetype($fd, $file_name);
3800         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3801                 $type .= "; charset=$default_text_plain_charset";
3802         }
3803
3804         return $type;
3805 }
3806
3807 # guess file syntax for syntax highlighting; return undef if no highlighting
3808 # the name of syntax can (in the future) depend on syntax highlighter used
3809 sub guess_file_syntax {
3810         my ($highlight, $mimetype, $file_name) = @_;
3811         return undef unless ($highlight && defined $file_name);
3812         my $basename = basename($file_name, '.in');
3813         return $highlight_basename{$basename}
3814                 if exists $highlight_basename{$basename};
3815
3816         $basename =~ /\.([^.]*)$/;
3817         my $ext = $1 or return undef;
3818         return $highlight_ext{$ext}
3819                 if exists $highlight_ext{$ext};
3820
3821         return undef;
3822 }
3823
3824 # run highlighter and return FD of its output,
3825 # or return original FD if no highlighting
3826 sub run_highlighter {
3827         my ($fd, $highlight, $syntax) = @_;
3828         return $fd unless ($highlight && defined $syntax);
3829
3830         close $fd;
3831         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3832                   quote_command($highlight_bin).
3833                   " --replace-tabs=8 --fragment --syntax $syntax |"
3834                 or die_error(500, "Couldn't open file or run syntax highlighter");
3835         return $fd;
3836 }
3837
3838 ## ======================================================================
3839 ## functions printing HTML: header, footer, error page
3840
3841 sub get_page_title {
3842         my $title = to_utf8($site_name);
3843
3844         unless (defined $project) {
3845                 if (defined $project_filter) {
3846                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3847                 }
3848                 return $title;
3849         }
3850         $title .= " - " . to_utf8($project);
3851
3852         return $title unless (defined $action);
3853         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3854
3855         return $title unless (defined $file_name);
3856         $title .= " - " . esc_path($file_name);
3857         if ($action eq "tree" && $file_name !~ m|/$|) {
3858                 $title .= "/";
3859         }
3860
3861         return $title;
3862 }
3863
3864 sub get_content_type_html {
3865         # require explicit support from the UA if we are to send the page as
3866         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3867         # we have to do this because MSIE sometimes globs '*/*', pretending to
3868         # support xhtml+xml but choking when it gets what it asked for.
3869         if (defined $cgi->http('HTTP_ACCEPT') &&
3870             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3871             $cgi->Accept('application/xhtml+xml') != 0) {
3872                 return 'application/xhtml+xml';
3873         } else {
3874                 return 'text/html';
3875         }
3876 }
3877
3878 sub print_feed_meta {
3879         if (defined $project) {
3880                 my %href_params = get_feed_info();
3881                 if (!exists $href_params{'-title'}) {
3882                         $href_params{'-title'} = 'log';
3883                 }
3884
3885                 foreach my $format (qw(RSS Atom)) {
3886                         my $type = lc($format);
3887                         my %link_attr = (
3888                                 '-rel' => 'alternate',
3889                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3890                                 '-type' => "application/$type+xml"
3891                         );
3892
3893                         $href_params{'extra_options'} = undef;
3894                         $href_params{'action'} = $type;
3895                         $link_attr{'-href'} = href(%href_params);
3896                         print "<link ".
3897                               "rel=\"$link_attr{'-rel'}\" ".
3898                               "title=\"$link_attr{'-title'}\" ".
3899                               "href=\"$link_attr{'-href'}\" ".
3900                               "type=\"$link_attr{'-type'}\" ".
3901                               "/>\n";
3902
3903                         $href_params{'extra_options'} = '--no-merges';
3904                         $link_attr{'-href'} = href(%href_params);
3905                         $link_attr{'-title'} .= ' (no merges)';
3906                         print "<link ".
3907                               "rel=\"$link_attr{'-rel'}\" ".
3908                               "title=\"$link_attr{'-title'}\" ".
3909                               "href=\"$link_attr{'-href'}\" ".
3910                               "type=\"$link_attr{'-type'}\" ".
3911                               "/>\n";
3912                 }
3913
3914         } else {
3915                 printf('<link rel="alternate" title="%s projects list" '.
3916                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3917                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3918                 printf('<link rel="alternate" title="%s projects feeds" '.
3919                        'href="%s" type="text/x-opml" />'."\n",
3920                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3921         }
3922 }
3923
3924 sub print_header_links {
3925         my $status = shift;
3926
3927         # print out each stylesheet that exist, providing backwards capability
3928         # for those people who defined $stylesheet in a config file
3929         if (defined $stylesheet) {
3930                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3931         } else {
3932                 foreach my $stylesheet (@stylesheets) {
3933                         next unless $stylesheet;
3934                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3935                 }
3936         }
3937         print_feed_meta()
3938                 if ($status eq '200 OK');
3939         if (defined $favicon) {
3940                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3941         }
3942 }
3943
3944 sub print_nav_breadcrumbs_path {
3945         my $dirprefix = undef;
3946         while (my $part = shift) {
3947                 $dirprefix .= "/" if defined $dirprefix;
3948                 $dirprefix .= $part;
3949                 print $cgi->a({-href => href(project => undef,
3950                                              project_filter => $dirprefix,
3951                                              action => "project_list")},
3952                               esc_html($part)) . " / ";
3953         }
3954 }
3955
3956 sub print_nav_breadcrumbs {
3957         my %opts = @_;
3958
3959         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3960         if (defined $project) {
3961                 my @dirname = split '/', $project;
3962                 my $projectbasename = pop @dirname;
3963                 print_nav_breadcrumbs_path(@dirname);
3964                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3965                 if (defined $action) {
3966                         my $action_print = $action ;
3967                         if (defined $opts{-action_extra}) {
3968                                 $action_print = $cgi->a({-href => href(action=>$action)},
3969                                         $action);
3970                         }
3971                         print " / $action_print";
3972                 }
3973                 if (defined $opts{-action_extra}) {
3974                         print " / $opts{-action_extra}";
3975                 }
3976                 print "\n";
3977         } elsif (defined $project_filter) {
3978                 print_nav_breadcrumbs_path(split '/', $project_filter);
3979         }
3980 }
3981
3982 sub print_search_form {
3983         if (!defined $searchtext) {
3984                 $searchtext = "";
3985         }
3986         my $search_hash;
3987         if (defined $hash_base) {
3988                 $search_hash = $hash_base;
3989         } elsif (defined $hash) {
3990                 $search_hash = $hash;
3991         } else {
3992                 $search_hash = "HEAD";
3993         }
3994         my $action = $my_uri;
3995         my $use_pathinfo = gitweb_check_feature('pathinfo');
3996         if ($use_pathinfo) {
3997                 $action .= "/".esc_url($project);
3998         }
3999         print $cgi->startform(-method => "get", -action => $action) .
4000               "<div class=\"search\">\n" .
4001               (!$use_pathinfo &&
4002               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4003               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4004               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4005               $cgi->popup_menu(-name => 'st', -default => 'commit',
4006                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4007               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4008               " search:\n",
4009               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4010               "<span title=\"Extended regular expression\">" .
4011               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4012                              -checked => $search_use_regexp) .
4013               "</span>" .
4014               "</div>" .
4015               $cgi->end_form() . "\n";
4016 }
4017
4018 sub git_header_html {
4019         my $status = shift || "200 OK";
4020         my $expires = shift;
4021         my %opts = @_;
4022
4023         my $title = get_page_title();
4024         my $content_type = get_content_type_html();
4025         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4026                            -status=> $status, -expires => $expires)
4027                 unless ($opts{'-no_http_header'});
4028         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4029         print <<EOF;
4030 <?xml version="1.0" encoding="utf-8"?>
4031 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4032 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4033 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4034 <!-- git core binaries version $git_version -->
4035 <head>
4036 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4037 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4038 <meta name="robots" content="index, nofollow"/>
4039 <title>$title</title>
4040 EOF
4041         # the stylesheet, favicon etc urls won't work correctly with path_info
4042         # unless we set the appropriate base URL
4043         if ($ENV{'PATH_INFO'}) {
4044                 print "<base href=\"".esc_url($base_url)."\" />\n";
4045         }
4046         print_header_links($status);
4047
4048         if (defined $site_html_head_string) {
4049                 print to_utf8($site_html_head_string);
4050         }
4051
4052         print "</head>\n" .
4053               "<body>\n";
4054
4055         if (defined $site_header && -f $site_header) {
4056                 insert_file($site_header);
4057         }
4058
4059         print "<div class=\"page_header\">\n";
4060         if (defined $logo) {
4061                 print $cgi->a({-href => esc_url($logo_url),
4062                                -title => $logo_label},
4063                               $cgi->img({-src => esc_url($logo),
4064                                          -width => 72, -height => 27,
4065                                          -alt => "git",
4066                                          -class => "logo"}));
4067         }
4068         print_nav_breadcrumbs(%opts);
4069         print "</div>\n";
4070
4071         my $have_search = gitweb_check_feature('search');
4072         if (defined $project && $have_search) {
4073                 print_search_form();
4074         }
4075 }
4076
4077 sub git_footer_html {
4078         my $feed_class = 'rss_logo';
4079
4080         print "<div class=\"page_footer\">\n";
4081         if (defined $project) {
4082                 my $descr = git_get_project_description($project);
4083                 if (defined $descr) {
4084                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4085                 }
4086
4087                 my %href_params = get_feed_info();
4088                 if (!%href_params) {
4089                         $feed_class .= ' generic';
4090                 }
4091                 $href_params{'-title'} ||= 'log';
4092
4093                 foreach my $format (qw(RSS Atom)) {
4094                         $href_params{'action'} = lc($format);
4095                         print $cgi->a({-href => href(%href_params),
4096                                       -title => "$href_params{'-title'} $format feed",
4097                                       -class => $feed_class}, $format)."\n";
4098                 }
4099
4100         } else {
4101                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4102                                              project_filter => $project_filter),
4103                               -class => $feed_class}, "OPML") . " ";
4104                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4105                                              project_filter => $project_filter),
4106                               -class => $feed_class}, "TXT") . "\n";
4107         }
4108         print "</div>\n"; # class="page_footer"
4109
4110         if (defined $t0 && gitweb_check_feature('timed')) {
4111                 print "<div id=\"generating_info\">\n";
4112                 print 'This page took '.
4113                       '<span id="generating_time" class="time_span">'.
4114                       tv_interval($t0, [ gettimeofday() ]).
4115                       ' seconds </span>'.
4116                       ' and '.
4117                       '<span id="generating_cmd">'.
4118                       $number_of_git_cmds.
4119                       '</span> git commands '.
4120                       " to generate.\n";
4121                 print "</div>\n"; # class="page_footer"
4122         }
4123
4124         if (defined $site_footer && -f $site_footer) {
4125                 insert_file($site_footer);
4126         }
4127
4128         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4129         if (defined $action &&
4130             $action eq 'blame_incremental') {
4131                 print qq!<script type="text/javascript">\n!.
4132                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4133                       qq!           "!. href() .qq!");\n!.
4134                       qq!</script>\n!;
4135         } else {
4136                 my ($jstimezone, $tz_cookie, $datetime_class) =
4137                         gitweb_get_feature('javascript-timezone');
4138
4139                 print qq!<script type="text/javascript">\n!.
4140                       qq!window.onload = function () {\n!;
4141                 if (gitweb_check_feature('javascript-actions')) {
4142                         print qq!       fixLinks();\n!;
4143                 }
4144                 if ($jstimezone && $tz_cookie && $datetime_class) {
4145                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4146                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4147                 }
4148                 print qq!};\n!.
4149                       qq!</script>\n!;
4150         }
4151
4152         print "</body>\n" .
4153               "</html>";
4154 }
4155
4156 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4157 # Example: die_error(404, 'Hash not found')
4158 # By convention, use the following status codes (as defined in RFC 2616):
4159 # 400: Invalid or missing CGI parameters, or
4160 #      requested object exists but has wrong type.
4161 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4162 #      this server or project.
4163 # 404: Requested object/revision/project doesn't exist.
4164 # 500: The server isn't configured properly, or
4165 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4166 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4167 # 503: The server is currently unavailable (because it is overloaded,
4168 #      or down for maintenance).  Generally, this is a temporary state.
4169 sub die_error {
4170         my $status = shift || 500;
4171         my $error = esc_html(shift) || "Internal Server Error";
4172         my $extra = shift;
4173         my %opts = @_;
4174
4175         my %http_responses = (
4176                 400 => '400 Bad Request',
4177                 403 => '403 Forbidden',
4178                 404 => '404 Not Found',
4179                 500 => '500 Internal Server Error',
4180                 503 => '503 Service Unavailable',
4181         );
4182         git_header_html($http_responses{$status}, undef, %opts);
4183         print <<EOF;
4184 <div class="page_body">
4185 <br /><br />
4186 $status - $error
4187 <br />
4188 EOF
4189         if (defined $extra) {
4190                 print "<hr />\n" .
4191                       "$extra\n";
4192         }
4193         print "</div>\n";
4194
4195         git_footer_html();
4196         goto DONE_GITWEB
4197                 unless ($opts{'-error_handler'});
4198 }
4199
4200 ## ----------------------------------------------------------------------
4201 ## functions printing or outputting HTML: navigation
4202
4203 sub git_print_page_nav {
4204         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4205         $extra = '' if !defined $extra; # pager or formats
4206
4207         my @navs = qw(summary shortlog log commit commitdiff tree);
4208         if ($suppress) {
4209                 @navs = grep { $_ ne $suppress } @navs;
4210         }
4211
4212         my %arg = map { $_ => {action=>$_} } @navs;
4213         if (defined $head) {
4214                 for (qw(commit commitdiff)) {
4215                         $arg{$_}{'hash'} = $head;
4216                 }
4217                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4218                         for (qw(shortlog log)) {
4219                                 $arg{$_}{'hash'} = $head;
4220                         }
4221                 }
4222         }
4223
4224         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4225         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4226
4227         my @actions = gitweb_get_feature('actions');
4228         my %repl = (
4229                 '%' => '%',
4230                 'n' => $project,         # project name
4231                 'f' => $git_dir,         # project path within filesystem
4232                 'h' => $treehead || '',  # current hash ('h' parameter)
4233                 'b' => $treebase || '',  # hash base ('hb' parameter)
4234         );
4235         while (@actions) {
4236                 my ($label, $link, $pos) = splice(@actions,0,3);
4237                 # insert
4238                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4239                 # munch munch
4240                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4241                 $arg{$label}{'_href'} = $link;
4242         }
4243
4244         print "<div class=\"page_nav\">\n" .
4245                 (join " | ",
4246                  map { $_ eq $current ?
4247                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4248                  } @navs);
4249         print "<br/>\n$extra<br/>\n" .
4250               "</div>\n";
4251 }
4252
4253 # returns a submenu for the nagivation of the refs views (tags, heads,
4254 # remotes) with the current view disabled and the remotes view only
4255 # available if the feature is enabled
4256 sub format_ref_views {
4257         my ($current) = @_;
4258         my @ref_views = qw{tags heads};
4259         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4260         return join " | ", map {
4261                 $_ eq $current ? $_ :
4262                 $cgi->a({-href => href(action=>$_)}, $_)
4263         } @ref_views
4264 }
4265
4266 sub format_paging_nav {
4267         my ($action, $page, $has_next_link) = @_;
4268         my $paging_nav;
4269
4270
4271         if ($page > 0) {
4272                 $paging_nav .=
4273                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4274                         " &sdot; " .
4275                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4276                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4277         } else {
4278                 $paging_nav .= "first &sdot; prev";
4279         }
4280
4281         if ($has_next_link) {
4282                 $paging_nav .= " &sdot; " .
4283                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4284                                  -accesskey => "n", -title => "Alt-n"}, "next");
4285         } else {
4286                 $paging_nav .= " &sdot; next";
4287         }
4288
4289         return $paging_nav;
4290 }
4291
4292 ## ......................................................................
4293 ## functions printing or outputting HTML: div
4294
4295 sub git_print_header_div {
4296         my ($action, $title, $hash, $hash_base) = @_;
4297         my %args = ();
4298
4299         $args{'action'} = $action;
4300         $args{'hash'} = $hash if $hash;
4301         $args{'hash_base'} = $hash_base if $hash_base;
4302
4303         print "<div class=\"header\">\n" .
4304               $cgi->a({-href => href(%args), -class => "title"},
4305               $title ? $title : $action) .
4306               "\n</div>\n";
4307 }
4308
4309 sub format_repo_url {
4310         my ($name, $url) = @_;
4311         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4312 }
4313
4314 # Group output by placing it in a DIV element and adding a header.
4315 # Options for start_div() can be provided by passing a hash reference as the
4316 # first parameter to the function.
4317 # Options to git_print_header_div() can be provided by passing an array
4318 # reference. This must follow the options to start_div if they are present.
4319 # The content can be a scalar, which is output as-is, a scalar reference, which
4320 # is output after html escaping, an IO handle passed either as *handle or
4321 # *handle{IO}, or a function reference. In the latter case all following
4322 # parameters will be taken as argument to the content function call.
4323 sub git_print_section {
4324         my ($div_args, $header_args, $content);
4325         my $arg = shift;
4326         if (ref($arg) eq 'HASH') {
4327                 $div_args = $arg;
4328                 $arg = shift;
4329         }
4330         if (ref($arg) eq 'ARRAY') {
4331                 $header_args = $arg;
4332                 $arg = shift;
4333         }
4334         $content = $arg;
4335
4336         print $cgi->start_div($div_args);
4337         git_print_header_div(@$header_args);
4338
4339         if (ref($content) eq 'CODE') {
4340                 $content->(@_);
4341         } elsif (ref($content) eq 'SCALAR') {
4342                 print esc_html($$content);
4343         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4344                 print <$content>;
4345         } elsif (!ref($content) && defined($content)) {
4346                 print $content;
4347         }
4348
4349         print $cgi->end_div;
4350 }
4351
4352 sub format_timestamp_html {
4353         my $date = shift;
4354         my $strtime = $date->{'rfc2822'};
4355
4356         my (undef, undef, $datetime_class) =
4357                 gitweb_get_feature('javascript-timezone');
4358         if ($datetime_class) {
4359                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4360         }
4361
4362         my $localtime_format = '(%02d:%02d %s)';
4363         if ($date->{'hour_local'} < 6) {
4364                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4365         }
4366         $strtime .= ' ' .
4367                     sprintf($localtime_format,
4368                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4369
4370         return $strtime;
4371 }
4372
4373 # Outputs the author name and date in long form
4374 sub git_print_authorship {
4375         my $co = shift;
4376         my %opts = @_;
4377         my $tag = $opts{-tag} || 'div';
4378         my $author = $co->{'author_name'};
4379
4380         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4381         print "<$tag class=\"author_date\">" .
4382               format_search_author($author, "author", esc_html($author)) .
4383               " [".format_timestamp_html(\%ad)."]".
4384               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4385               "</$tag>\n";
4386 }
4387
4388 # Outputs table rows containing the full author or committer information,
4389 # in the format expected for 'commit' view (& similar).
4390 # Parameters are a commit hash reference, followed by the list of people
4391 # to output information for. If the list is empty it defaults to both
4392 # author and committer.
4393 sub git_print_authorship_rows {
4394         my $co = shift;
4395         # too bad we can't use @people = @_ || ('author', 'committer')
4396         my @people = @_;
4397         @people = ('author', 'committer') unless @people;
4398         foreach my $who (@people) {
4399                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4400                 print "<tr><td>$who</td><td>" .
4401                       format_search_author($co->{"${who}_name"}, $who,
4402                                            esc_html($co->{"${who}_name"})) . " " .
4403                       format_search_author($co->{"${who}_email"}, $who,
4404                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4405                       "</td><td rowspan=\"2\">" .
4406                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4407                       "</td></tr>\n" .
4408                       "<tr>" .
4409                       "<td></td><td>" .
4410                       format_timestamp_html(\%wd) .
4411                       "</td>" .
4412                       "</tr>\n";
4413         }
4414 }
4415
4416 sub git_print_page_path {
4417         my $name = shift;
4418         my $type = shift;
4419         my $hb = shift;
4420
4421
4422         print "<div class=\"page_path\">";
4423         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4424                       -title => 'tree root'}, to_utf8("[$project]"));
4425         print " / ";
4426         if (defined $name) {
4427                 my @dirname = split '/', $name;
4428                 my $basename = pop @dirname;
4429                 my $fullname = '';
4430
4431                 foreach my $dir (@dirname) {
4432                         $fullname .= ($fullname ? '/' : '') . $dir;
4433                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4434                                                      hash_base=>$hb),
4435                                       -title => $fullname}, esc_path($dir));
4436                         print " / ";
4437                 }
4438                 if (defined $type && $type eq 'blob') {
4439                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4440                                                      hash_base=>$hb),
4441                                       -title => $name}, esc_path($basename));
4442                 } elsif (defined $type && $type eq 'tree') {
4443                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4444                                                      hash_base=>$hb),
4445                                       -title => $name}, esc_path($basename));
4446                         print " / ";
4447                 } else {
4448                         print esc_path($basename);
4449                 }
4450         }
4451         print "<br/></div>\n";
4452 }
4453
4454 sub git_print_log {
4455         my $log = shift;
4456         my %opts = @_;
4457
4458         if ($opts{'-remove_title'}) {
4459                 # remove title, i.e. first line of log
4460                 shift @$log;
4461         }
4462         # remove leading empty lines
4463         while (defined $log->[0] && $log->[0] eq "") {
4464                 shift @$log;
4465         }
4466
4467         # print log
4468         my $signoff = 0;
4469         my $empty = 0;
4470         foreach my $line (@$log) {
4471                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4472                         $signoff = 1;
4473                         $empty = 0;
4474                         if (! $opts{'-remove_signoff'}) {
4475                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4476                                 next;
4477                         } else {
4478                                 # remove signoff lines
4479                                 next;
4480                         }
4481                 } else {
4482                         $signoff = 0;
4483                 }
4484
4485                 # print only one empty line
4486                 # do not print empty line after signoff
4487                 if ($line eq "") {
4488                         next if ($empty || $signoff);
4489                         $empty = 1;
4490                 } else {
4491                         $empty = 0;
4492                 }
4493
4494                 print format_log_line_html($line) . "<br/>\n";
4495         }
4496
4497         if ($opts{'-final_empty_line'}) {
4498                 # end with single empty line
4499                 print "<br/>\n" unless $empty;
4500         }
4501 }
4502
4503 # return link target (what link points to)
4504 sub git_get_link_target {
4505         my $hash = shift;
4506         my $link_target;
4507
4508         # read link
4509         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4510                 or return;
4511         {
4512                 local $/ = undef;
4513                 $link_target = <$fd>;
4514         }
4515         close $fd
4516                 or return;
4517
4518         return $link_target;
4519 }
4520
4521 # given link target, and the directory (basedir) the link is in,
4522 # return target of link relative to top directory (top tree);
4523 # return undef if it is not possible (including absolute links).
4524 sub normalize_link_target {
4525         my ($link_target, $basedir) = @_;
4526
4527         # absolute symlinks (beginning with '/') cannot be normalized
4528         return if (substr($link_target, 0, 1) eq '/');
4529
4530         # normalize link target to path from top (root) tree (dir)
4531         my $path;
4532         if ($basedir) {
4533                 $path = $basedir . '/' . $link_target;
4534         } else {
4535                 # we are in top (root) tree (dir)
4536                 $path = $link_target;
4537         }
4538
4539         # remove //, /./, and /../
4540         my @path_parts;
4541         foreach my $part (split('/', $path)) {
4542                 # discard '.' and ''
4543                 next if (!$part || $part eq '.');
4544                 # handle '..'
4545                 if ($part eq '..') {
4546                         if (@path_parts) {
4547                                 pop @path_parts;
4548                         } else {
4549                                 # link leads outside repository (outside top dir)
4550                                 return;
4551                         }
4552                 } else {
4553                         push @path_parts, $part;
4554                 }
4555         }
4556         $path = join('/', @path_parts);
4557
4558         return $path;
4559 }
4560
4561 # print tree entry (row of git_tree), but without encompassing <tr> element
4562 sub git_print_tree_entry {
4563         my ($t, $basedir, $hash_base, $have_blame) = @_;
4564
4565         my %base_key = ();
4566         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4567
4568         # The format of a table row is: mode list link.  Where mode is
4569         # the mode of the entry, list is the name of the entry, an href,
4570         # and link is the action links of the entry.
4571
4572         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4573         if (exists $t->{'size'}) {
4574                 print "<td class=\"size\">$t->{'size'}</td>\n";
4575         }
4576         if ($t->{'type'} eq "blob") {
4577                 print "<td class=\"list\">" .
4578                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4579                                                file_name=>"$basedir$t->{'name'}", %base_key),
4580                                 -class => "list"}, esc_path($t->{'name'}));
4581                 if (S_ISLNK(oct $t->{'mode'})) {
4582                         my $link_target = git_get_link_target($t->{'hash'});
4583                         if ($link_target) {
4584                                 my $norm_target = normalize_link_target($link_target, $basedir);
4585                                 if (defined $norm_target) {
4586                                         print " -> " .
4587                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4588                                                                      file_name=>$norm_target),
4589                                                        -title => $norm_target}, esc_path($link_target));
4590                                 } else {
4591                                         print " -> " . esc_path($link_target);
4592                                 }
4593                         }
4594                 }
4595                 print "</td>\n";
4596                 print "<td class=\"link\">";
4597                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4598                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4599                               "blob");
4600                 if ($have_blame) {
4601                         print " | " .
4602                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4603                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4604                                       "blame");
4605                 }
4606                 if (defined $hash_base) {
4607                         print " | " .
4608                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4609                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4610                                       "history");
4611                 }
4612                 print " | " .
4613                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4614                                                file_name=>"$basedir$t->{'name'}")},
4615                                 "raw");
4616                 print "</td>\n";
4617
4618         } elsif ($t->{'type'} eq "tree") {
4619                 print "<td class=\"list\">";
4620                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4621                                              file_name=>"$basedir$t->{'name'}",
4622                                              %base_key)},
4623                               esc_path($t->{'name'}));
4624                 print "</td>\n";
4625                 print "<td class=\"link\">";
4626                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4627                                              file_name=>"$basedir$t->{'name'}",
4628                                              %base_key)},
4629                               "tree");
4630                 if (defined $hash_base) {
4631                         print " | " .
4632                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4633                                                      file_name=>"$basedir$t->{'name'}")},
4634                                       "history");
4635                 }
4636                 print "</td>\n";
4637         } else {
4638                 # unknown object: we can only present history for it
4639                 # (this includes 'commit' object, i.e. submodule support)
4640                 print "<td class=\"list\">" .
4641                       esc_path($t->{'name'}) .
4642                       "</td>\n";
4643                 print "<td class=\"link\">";
4644                 if (defined $hash_base) {
4645                         print $cgi->a({-href => href(action=>"history",
4646                                                      hash_base=>$hash_base,
4647                                                      file_name=>"$basedir$t->{'name'}")},
4648                                       "history");
4649                 }
4650                 print "</td>\n";
4651         }
4652 }
4653
4654 ## ......................................................................
4655 ## functions printing large fragments of HTML
4656
4657 # get pre-image filenames for merge (combined) diff
4658 sub fill_from_file_info {
4659         my ($diff, @parents) = @_;
4660
4661         $diff->{'from_file'} = [ ];
4662         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4663         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4664                 if ($diff->{'status'}[$i] eq 'R' ||
4665                     $diff->{'status'}[$i] eq 'C') {
4666                         $diff->{'from_file'}[$i] =
4667                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4668                 }
4669         }
4670
4671         return $diff;
4672 }
4673
4674 # is current raw difftree line of file deletion
4675 sub is_deleted {
4676         my $diffinfo = shift;
4677
4678         return $diffinfo->{'to_id'} eq ('0' x 40);
4679 }
4680
4681 # does patch correspond to [previous] difftree raw line
4682 # $diffinfo  - hashref of parsed raw diff format
4683 # $patchinfo - hashref of parsed patch diff format
4684 #              (the same keys as in $diffinfo)
4685 sub is_patch_split {
4686         my ($diffinfo, $patchinfo) = @_;
4687
4688         return defined $diffinfo && defined $patchinfo
4689                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4690 }
4691
4692
4693 sub git_difftree_body {
4694         my ($difftree, $hash, @parents) = @_;
4695         my ($parent) = $parents[0];
4696         my $have_blame = gitweb_check_feature('blame');
4697         print "<div class=\"list_head\">\n";
4698         if ($#{$difftree} > 10) {
4699                 print(($#{$difftree} + 1) . " files changed:\n");
4700         }
4701         print "</div>\n";
4702
4703         print "<table class=\"" .
4704               (@parents > 1 ? "combined " : "") .
4705               "diff_tree\">\n";
4706
4707         # header only for combined diff in 'commitdiff' view
4708         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4709         if ($has_header) {
4710                 # table header
4711                 print "<thead><tr>\n" .
4712                        "<th></th><th></th>\n"; # filename, patchN link
4713                 for (my $i = 0; $i < @parents; $i++) {
4714                         my $par = $parents[$i];
4715                         print "<th>" .
4716                               $cgi->a({-href => href(action=>"commitdiff",
4717                                                      hash=>$hash, hash_parent=>$par),
4718                                        -title => 'commitdiff to parent number ' .
4719                                                   ($i+1) . ': ' . substr($par,0,7)},
4720                                       $i+1) .
4721                               "&nbsp;</th>\n";
4722                 }
4723                 print "</tr></thead>\n<tbody>\n";
4724         }
4725
4726         my $alternate = 1;
4727         my $patchno = 0;
4728         foreach my $line (@{$difftree}) {
4729                 my $diff = parsed_difftree_line($line);
4730
4731                 if ($alternate) {
4732                         print "<tr class=\"dark\">\n";
4733                 } else {
4734                         print "<tr class=\"light\">\n";
4735                 }
4736                 $alternate ^= 1;
4737
4738                 if (exists $diff->{'nparents'}) { # combined diff
4739
4740                         fill_from_file_info($diff, @parents)
4741                                 unless exists $diff->{'from_file'};
4742
4743                         if (!is_deleted($diff)) {
4744                                 # file exists in the result (child) commit
4745                                 print "<td>" .
4746                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4747                                                              file_name=>$diff->{'to_file'},
4748                                                              hash_base=>$hash),
4749                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4750                                       "</td>\n";
4751                         } else {
4752                                 print "<td>" .
4753                                       esc_path($diff->{'to_file'}) .
4754                                       "</td>\n";
4755                         }
4756
4757                         if ($action eq 'commitdiff') {
4758                                 # link to patch
4759                                 $patchno++;
4760                                 print "<td class=\"link\">" .
4761                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4762                                               "patch") .
4763                                       " | " .
4764                                       "</td>\n";
4765                         }
4766
4767                         my $has_history = 0;
4768                         my $not_deleted = 0;
4769                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4770                                 my $hash_parent = $parents[$i];
4771                                 my $from_hash = $diff->{'from_id'}[$i];
4772                                 my $from_path = $diff->{'from_file'}[$i];
4773                                 my $status = $diff->{'status'}[$i];
4774
4775                                 $has_history ||= ($status ne 'A');
4776                                 $not_deleted ||= ($status ne 'D');
4777
4778                                 if ($status eq 'A') {
4779                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4780                                 } elsif ($status eq 'D') {
4781                                         print "<td class=\"link\">" .
4782                                               $cgi->a({-href => href(action=>"blob",
4783                                                                      hash_base=>$hash,
4784                                                                      hash=>$from_hash,
4785                                                                      file_name=>$from_path)},
4786                                                       "blob" . ($i+1)) .
4787                                               " | </td>\n";
4788                                 } else {
4789                                         if ($diff->{'to_id'} eq $from_hash) {
4790                                                 print "<td class=\"link nochange\">";
4791                                         } else {
4792                                                 print "<td class=\"link\">";
4793                                         }
4794                                         print $cgi->a({-href => href(action=>"blobdiff",
4795                                                                      hash=>$diff->{'to_id'},
4796                                                                      hash_parent=>$from_hash,
4797                                                                      hash_base=>$hash,
4798                                                                      hash_parent_base=>$hash_parent,
4799                                                                      file_name=>$diff->{'to_file'},
4800                                                                      file_parent=>$from_path)},
4801                                                       "diff" . ($i+1)) .
4802                                               " | </td>\n";
4803                                 }
4804                         }
4805
4806                         print "<td class=\"link\">";
4807                         if ($not_deleted) {
4808                                 print $cgi->a({-href => href(action=>"blob",
4809                                                              hash=>$diff->{'to_id'},
4810                                                              file_name=>$diff->{'to_file'},
4811                                                              hash_base=>$hash)},
4812                                               "blob");
4813                                 print " | " if ($has_history);
4814                         }
4815                         if ($has_history) {
4816                                 print $cgi->a({-href => href(action=>"history",
4817                                                              file_name=>$diff->{'to_file'},
4818                                                              hash_base=>$hash)},
4819                                               "history");
4820                         }
4821                         print "</td>\n";
4822
4823                         print "</tr>\n";
4824                         next; # instead of 'else' clause, to avoid extra indent
4825                 }
4826                 # else ordinary diff
4827
4828                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4829                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4830                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4831                         $to_mode_oct = oct $diff->{'to_mode'};
4832                         if (S_ISREG($to_mode_oct)) { # only for regular file
4833                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4834                         }
4835                         $to_file_type = file_type($diff->{'to_mode'});
4836                 }
4837                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4838                         $from_mode_oct = oct $diff->{'from_mode'};
4839                         if (S_ISREG($from_mode_oct)) { # only for regular file
4840                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4841                         }
4842                         $from_file_type = file_type($diff->{'from_mode'});
4843                 }
4844
4845                 if ($diff->{'status'} eq "A") { # created
4846                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4847                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4848                         $mode_chng   .= "]</span>";
4849                         print "<td>";
4850                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4851                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4852                                       -class => "list"}, esc_path($diff->{'file'}));
4853                         print "</td>\n";
4854                         print "<td>$mode_chng</td>\n";
4855                         print "<td class=\"link\">";
4856                         if ($action eq 'commitdiff') {
4857                                 # link to patch
4858                                 $patchno++;
4859                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4860                                               "patch") .
4861                                       " | ";
4862                         }
4863                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4864                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4865                                       "blob");
4866                         print "</td>\n";
4867
4868                 } elsif ($diff->{'status'} eq "D") { # deleted
4869                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4870                         print "<td>";
4871                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4872                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4873                                        -class => "list"}, esc_path($diff->{'file'}));
4874                         print "</td>\n";
4875                         print "<td>$mode_chng</td>\n";
4876                         print "<td class=\"link\">";
4877                         if ($action eq 'commitdiff') {
4878                                 # link to patch
4879                                 $patchno++;
4880                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4881                                               "patch") .
4882                                       " | ";
4883                         }
4884                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4885                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4886                                       "blob") . " | ";
4887                         if ($have_blame) {
4888                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4889                                                              file_name=>$diff->{'file'})},
4890                                               "blame") . " | ";
4891                         }
4892                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4893                                                      file_name=>$diff->{'file'})},
4894                                       "history");
4895                         print "</td>\n";
4896
4897                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4898                         my $mode_chnge = "";
4899                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4900                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4901                                 if ($from_file_type ne $to_file_type) {
4902                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4903                                 }
4904                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4905                                         if ($from_mode_str && $to_mode_str) {
4906                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4907                                         } elsif ($to_mode_str) {
4908                                                 $mode_chnge .= " mode: $to_mode_str";
4909                                         }
4910                                 }
4911                                 $mode_chnge .= "]</span>\n";
4912                         }
4913                         print "<td>";
4914                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4915                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4916                                       -class => "list"}, esc_path($diff->{'file'}));
4917                         print "</td>\n";
4918                         print "<td>$mode_chnge</td>\n";
4919                         print "<td class=\"link\">";
4920                         if ($action eq 'commitdiff') {
4921                                 # link to patch
4922                                 $patchno++;
4923                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4924                                               "patch") .
4925                                       " | ";
4926                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4927                                 # "commit" view and modified file (not onlu mode changed)
4928                                 print $cgi->a({-href => href(action=>"blobdiff",
4929                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4930                                                              hash_base=>$hash, hash_parent_base=>$parent,
4931                                                              file_name=>$diff->{'file'})},
4932                                               "diff") .
4933                                       " | ";
4934                         }
4935                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4936                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4937                                        "blob") . " | ";
4938                         if ($have_blame) {
4939                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4940                                                              file_name=>$diff->{'file'})},
4941                                               "blame") . " | ";
4942                         }
4943                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4944                                                      file_name=>$diff->{'file'})},
4945                                       "history");
4946                         print "</td>\n";
4947
4948                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4949                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4950                         my $nstatus = $status_name{$diff->{'status'}};
4951                         my $mode_chng = "";
4952                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4953                                 # mode also for directories, so we cannot use $to_mode_str
4954                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4955                         }
4956                         print "<td>" .
4957                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4958                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4959                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4960                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4961                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4962                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4963                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4964                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4965                               "<td class=\"link\">";
4966                         if ($action eq 'commitdiff') {
4967                                 # link to patch
4968                                 $patchno++;
4969                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4970                                               "patch") .
4971                                       " | ";
4972                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4973                                 # "commit" view and modified file (not only pure rename or copy)
4974                                 print $cgi->a({-href => href(action=>"blobdiff",
4975                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4976                                                              hash_base=>$hash, hash_parent_base=>$parent,
4977                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4978                                               "diff") .
4979                                       " | ";
4980                         }
4981                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4982                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4983                                       "blob") . " | ";
4984                         if ($have_blame) {
4985                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4986                                                              file_name=>$diff->{'to_file'})},
4987                                               "blame") . " | ";
4988                         }
4989                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4990                                                     file_name=>$diff->{'to_file'})},
4991                                       "history");
4992                         print "</td>\n";
4993
4994                 } # we should not encounter Unmerged (U) or Unknown (X) status
4995                 print "</tr>\n";
4996         }
4997         print "</tbody>" if $has_header;
4998         print "</table>\n";
4999 }
5000
5001 sub print_sidebyside_diff_chunk {
5002         my @chunk = @_;
5003         my (@ctx, @rem, @add);
5004
5005         return unless @chunk;
5006
5007         # incomplete last line might be among removed or added lines,
5008         # or both, or among context lines: find which
5009         for (my $i = 1; $i < @chunk; $i++) {
5010                 if ($chunk[$i][0] eq 'incomplete') {
5011                         $chunk[$i][0] = $chunk[$i-1][0];
5012                 }
5013         }
5014
5015         # guardian
5016         push @chunk, ["", ""];
5017
5018         foreach my $line_info (@chunk) {
5019                 my ($class, $line) = @$line_info;
5020
5021                 # print chunk headers
5022                 if ($class && $class eq 'chunk_header') {
5023                         print $line;
5024                         next;
5025                 }
5026
5027                 ## print from accumulator when type of class of lines change
5028                 # empty contents block on start rem/add block, or end of chunk
5029                 if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
5030                         print join '',
5031                                 '<div class="chunk_block ctx">',
5032                                         '<div class="old">',
5033                                         @ctx,
5034                                         '</div>',
5035                                         '<div class="new">',
5036                                         @ctx,
5037                                         '</div>',
5038                                 '</div>';
5039                         @ctx = ();
5040                 }
5041                 # empty add/rem block on start context block, or end of chunk
5042                 if ((@rem || @add) && (!$class || $class eq 'ctx')) {
5043                         if (!@add) {
5044                                 # pure removal
5045                                 print join '',
5046                                         '<div class="chunk_block rem">',
5047                                                 '<div class="old">',
5048                                                 @rem,
5049                                                 '</div>',
5050                                         '</div>';
5051                         } elsif (!@rem) {
5052                                 # pure addition
5053                                 print join '',
5054                                         '<div class="chunk_block add">',
5055                                                 '<div class="new">',
5056                                                 @add,
5057                                                 '</div>',
5058                                         '</div>';
5059                         } else {
5060                                 # assume that it is change
5061                                 print join '',
5062                                         '<div class="chunk_block chg">',
5063                                                 '<div class="old">',
5064                                                 @rem,
5065                                                 '</div>',
5066                                                 '<div class="new">',
5067                                                 @add,
5068                                                 '</div>',
5069                                         '</div>';
5070                         }
5071                         @rem = @add = ();
5072                 }
5073
5074                 ## adding lines to accumulator
5075                 # guardian value
5076                 last unless $line;
5077                 # rem, add or change
5078                 if ($class eq 'rem') {
5079                         push @rem, $line;
5080                 } elsif ($class eq 'add') {
5081                         push @add, $line;
5082                 }
5083                 # context line
5084                 if ($class eq 'ctx') {
5085                         push @ctx, $line;
5086                 }
5087         }
5088 }
5089
5090 sub git_patchset_body {
5091         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5092         my ($hash_parent) = $hash_parents[0];
5093
5094         my $is_combined = (@hash_parents > 1);
5095         my $patch_idx = 0;
5096         my $patch_number = 0;
5097         my $patch_line;
5098         my $diffinfo;
5099         my $to_name;
5100         my (%from, %to);
5101         my @chunk; # for side-by-side diff
5102
5103         print "<div class=\"patchset\">\n";
5104
5105         # skip to first patch
5106         while ($patch_line = <$fd>) {
5107                 chomp $patch_line;
5108
5109                 last if ($patch_line =~ m/^diff /);
5110         }
5111
5112  PATCH:
5113         while ($patch_line) {
5114
5115                 # parse "git diff" header line
5116                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5117                         # $1 is from_name, which we do not use
5118                         $to_name = unquote($2);
5119                         $to_name =~ s!^b/!!;
5120                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5121                         # $1 is 'cc' or 'combined', which we do not use
5122                         $to_name = unquote($2);
5123                 } else {
5124                         $to_name = undef;
5125                 }
5126
5127                 # check if current patch belong to current raw line
5128                 # and parse raw git-diff line if needed
5129                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5130                         # this is continuation of a split patch
5131                         print "<div class=\"patch cont\">\n";
5132                 } else {
5133                         # advance raw git-diff output if needed
5134                         $patch_idx++ if defined $diffinfo;
5135
5136                         # read and prepare patch information
5137                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5138
5139                         # compact combined diff output can have some patches skipped
5140                         # find which patch (using pathname of result) we are at now;
5141                         if ($is_combined) {
5142                                 while ($to_name ne $diffinfo->{'to_file'}) {
5143                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5144                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5145                                               "</div>\n";  # class="patch"
5146
5147                                         $patch_idx++;
5148                                         $patch_number++;
5149
5150                                         last if $patch_idx > $#$difftree;
5151                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5152                                 }
5153                         }
5154
5155                         # modifies %from, %to hashes
5156                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5157
5158                         # this is first patch for raw difftree line with $patch_idx index
5159                         # we index @$difftree array from 0, but number patches from 1
5160                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5161                 }
5162
5163                 # git diff header
5164                 #assert($patch_line =~ m/^diff /) if DEBUG;
5165                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5166                 $patch_number++;
5167                 # print "git diff" header
5168                 print format_git_diff_header_line($patch_line, $diffinfo,
5169                                                   \%from, \%to);
5170
5171                 # print extended diff header
5172                 print "<div class=\"diff extended_header\">\n";
5173         EXTENDED_HEADER:
5174                 while ($patch_line = <$fd>) {
5175                         chomp $patch_line;
5176
5177                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5178
5179                         print format_extended_diff_header_line($patch_line, $diffinfo,
5180                                                                \%from, \%to);
5181                 }
5182                 print "</div>\n"; # class="diff extended_header"
5183
5184                 # from-file/to-file diff header
5185                 if (! $patch_line) {
5186                         print "</div>\n"; # class="patch"
5187                         last PATCH;
5188                 }
5189                 next PATCH if ($patch_line =~ m/^diff /);
5190                 #assert($patch_line =~ m/^---/) if DEBUG;
5191
5192                 my $last_patch_line = $patch_line;
5193                 $patch_line = <$fd>;
5194                 chomp $patch_line;
5195                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5196
5197                 print format_diff_from_to_header($last_patch_line, $patch_line,
5198                                                  $diffinfo, \%from, \%to,
5199                                                  @hash_parents);
5200
5201                 # the patch itself
5202         LINE:
5203                 while ($patch_line = <$fd>) {
5204                         chomp $patch_line;
5205
5206                         next PATCH if ($patch_line =~ m/^diff /);
5207
5208                         my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5209                         my $diff_classes = "diff";
5210                         $diff_classes .= " $class" if ($class);
5211                         $line = "<div class=\"$diff_classes\">$line</div>\n";
5212
5213                         if ($diff_style eq 'sidebyside' && !$is_combined) {
5214                                 if ($class eq 'chunk_header') {
5215                                         print_sidebyside_diff_chunk(@chunk);
5216                                         @chunk = ( [ $class, $line ] );
5217                                 } else {
5218                                         push @chunk, [ $class, $line ];
5219                                 }
5220                         } else {
5221                                 # default 'inline' style and unknown styles
5222                                 print $line;
5223                         }
5224                 }
5225
5226         } continue {
5227                 if (@chunk) {
5228                         print_sidebyside_diff_chunk(@chunk);
5229                         @chunk = ();
5230                 }
5231                 print "</div>\n"; # class="patch"
5232         }
5233
5234         # for compact combined (--cc) format, with chunk and patch simplification
5235         # the patchset might be empty, but there might be unprocessed raw lines
5236         for (++$patch_idx if $patch_number > 0;
5237              $patch_idx < @$difftree;
5238              ++$patch_idx) {
5239                 # read and prepare patch information
5240                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5241
5242                 # generate anchor for "patch" links in difftree / whatchanged part
5243                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5244                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5245                       "</div>\n";  # class="patch"
5246
5247                 $patch_number++;
5248         }
5249
5250         if ($patch_number == 0) {
5251                 if (@hash_parents > 1) {
5252                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5253                 } else {
5254                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5255                 }
5256         }
5257
5258         print "</div>\n"; # class="patchset"
5259 }
5260
5261 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5262
5263 sub git_project_search_form {
5264         my ($searchtext, $search_use_regexp) = @_;
5265
5266         my $limit = '';
5267         if ($project_filter) {
5268                 $limit = " in '$project_filter/'";
5269         }
5270
5271         print "<div class=\"projsearch\">\n";
5272         print $cgi->startform(-method => 'get', -action => $my_uri) .
5273               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5274         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5275                 if (defined $project_filter);
5276         print $cgi->textfield(-name => 's', -value => $searchtext,
5277                               -title => "Search project by name and description$limit",
5278                               -size => 60) . "\n" .
5279               "<span title=\"Extended regular expression\">" .
5280               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5281                              -checked => $search_use_regexp) .
5282               "</span>\n" .
5283               $cgi->submit(-name => 'btnS', -value => 'Search') .
5284               $cgi->end_form() . "\n" .
5285               $cgi->a({-href => href(project => undef, searchtext => undef,
5286                                      project_filter => $project_filter)},
5287                       esc_html("List all projects$limit")) . "<br />\n";
5288         print "</div>\n";
5289 }
5290
5291 # entry for given @keys needs filling if at least one of keys in list
5292 # is not present in %$project_info
5293 sub project_info_needs_filling {
5294         my ($project_info, @keys) = @_;
5295
5296         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5297         foreach my $key (@keys) {
5298                 if (!exists $project_info->{$key}) {
5299                         return 1;
5300                 }
5301         }
5302         return;
5303 }
5304
5305 # fills project list info (age, description, owner, category, forks, etc.)
5306 # for each project in the list, removing invalid projects from
5307 # returned list, or fill only specified info.
5308 #
5309 # Invalid projects are removed from the returned list if and only if you
5310 # ask 'age' or 'age_string' to be filled, because they are the only fields
5311 # that run unconditionally git command that requires repository, and
5312 # therefore do always check if project repository is invalid.
5313 #
5314 # USAGE:
5315 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5316 #   ensures that 'descr_long' and 'ctags' fields are filled
5317 # * @project_list = fill_project_list_info(\@project_list)
5318 #   ensures that all fields are filled (and invalid projects removed)
5319 #
5320 # NOTE: modifies $projlist, but does not remove entries from it
5321 sub fill_project_list_info {
5322         my ($projlist, @wanted_keys) = @_;
5323         my @projects;
5324         my $filter_set = sub { return @_; };
5325         if (@wanted_keys) {
5326                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5327                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5328         }
5329
5330         my $show_ctags = gitweb_check_feature('ctags');
5331  PROJECT:
5332         foreach my $pr (@$projlist) {
5333                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5334                         my (@activity) = git_get_last_activity($pr->{'path'});
5335                         unless (@activity) {
5336                                 next PROJECT;
5337                         }
5338                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5339                 }
5340                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5341                         my $descr = git_get_project_description($pr->{'path'}) || "";
5342                         $descr = to_utf8($descr);
5343                         $pr->{'descr_long'} = $descr;
5344                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5345                 }
5346                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5347                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5348                 }
5349                 if ($show_ctags &&
5350                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5351                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5352                 }
5353                 if ($projects_list_group_categories &&
5354                     project_info_needs_filling($pr, $filter_set->('category'))) {
5355                         my $cat = git_get_project_category($pr->{'path'}) ||
5356                                                            $project_list_default_category;
5357                         $pr->{'category'} = to_utf8($cat);
5358                 }
5359
5360                 push @projects, $pr;
5361         }
5362
5363         return @projects;
5364 }
5365
5366 sub sort_projects_list {
5367         my ($projlist, $order) = @_;
5368         my @projects;
5369
5370         my %order_info = (
5371                 project => { key => 'path', type => 'str' },
5372                 descr => { key => 'descr_long', type => 'str' },
5373                 owner => { key => 'owner', type => 'str' },
5374                 age => { key => 'age', type => 'num' }
5375         );
5376         my $oi = $order_info{$order};
5377         return @$projlist unless defined $oi;
5378         if ($oi->{'type'} eq 'str') {
5379                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5380         } else {
5381                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5382         }
5383
5384         return @projects;
5385 }
5386
5387 # returns a hash of categories, containing the list of project
5388 # belonging to each category
5389 sub build_projlist_by_category {
5390         my ($projlist, $from, $to) = @_;
5391         my %categories;
5392
5393         $from = 0 unless defined $from;
5394         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5395
5396         for (my $i = $from; $i <= $to; $i++) {
5397                 my $pr = $projlist->[$i];
5398                 push @{$categories{ $pr->{'category'} }}, $pr;
5399         }
5400
5401         return wantarray ? %categories : \%categories;
5402 }
5403
5404 # print 'sort by' <th> element, generating 'sort by $name' replay link
5405 # if that order is not selected
5406 sub print_sort_th {
5407         print format_sort_th(@_);
5408 }
5409
5410 sub format_sort_th {
5411         my ($name, $order, $header) = @_;
5412         my $sort_th = "";
5413         $header ||= ucfirst($name);
5414
5415         if ($order eq $name) {
5416                 $sort_th .= "<th>$header</th>\n";
5417         } else {
5418                 $sort_th .= "<th>" .
5419                             $cgi->a({-href => href(-replay=>1, order=>$name),
5420                                      -class => "header"}, $header) .
5421                             "</th>\n";
5422         }
5423
5424         return $sort_th;
5425 }
5426
5427 sub git_project_list_rows {
5428         my ($projlist, $from, $to, $check_forks) = @_;
5429
5430         $from = 0 unless defined $from;
5431         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5432
5433         my $alternate = 1;
5434         for (my $i = $from; $i <= $to; $i++) {
5435                 my $pr = $projlist->[$i];
5436
5437                 if ($alternate) {
5438                         print "<tr class=\"dark\">\n";
5439                 } else {
5440                         print "<tr class=\"light\">\n";
5441                 }
5442                 $alternate ^= 1;
5443
5444                 if ($check_forks) {
5445                         print "<td>";
5446                         if ($pr->{'forks'}) {
5447                                 my $nforks = scalar @{$pr->{'forks'}};
5448                                 if ($nforks > 0) {
5449                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5450                                                        -title => "$nforks forks"}, "+");
5451                                 } else {
5452                                         print $cgi->span({-title => "$nforks forks"}, "+");
5453                                 }
5454                         }
5455                         print "</td>\n";
5456                 }
5457                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5458                                         -class => "list"},
5459                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5460                       "</td>\n" .
5461                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5462                                         -class => "list",
5463                                         -title => $pr->{'descr_long'}},
5464                                         $search_regexp
5465                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5466                                                                     $pr->{'descr'}, $search_regexp)
5467                                         : esc_html($pr->{'descr'})) .
5468                       "</td>\n" .
5469                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5470                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5471                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5472                       "<td class=\"link\">" .
5473                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5474                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5475                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5476                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5477                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5478                       "</td>\n" .
5479                       "</tr>\n";
5480         }
5481 }
5482
5483 sub git_project_list_body {
5484         # actually uses global variable $project
5485         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5486         my @projects = @$projlist;
5487
5488         my $check_forks = gitweb_check_feature('forks');
5489         my $show_ctags  = gitweb_check_feature('ctags');
5490         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5491         $check_forks = undef
5492                 if ($tagfilter || $search_regexp);
5493
5494         # filtering out forks before filling info allows to do less work
5495         @projects = filter_forks_from_projects_list(\@projects)
5496                 if ($check_forks);
5497         # search_projects_list pre-fills required info
5498         @projects = search_projects_list(\@projects,
5499                                          'search_regexp' => $search_regexp,
5500                                          'tagfilter'  => $tagfilter)
5501                 if ($tagfilter || $search_regexp);
5502         # fill the rest
5503         @projects = fill_project_list_info(\@projects);
5504
5505         $order ||= $default_projects_order;
5506         $from = 0 unless defined $from;
5507         $to = $#projects if (!defined $to || $#projects < $to);
5508
5509         # short circuit
5510         if ($from > $to) {
5511                 print "<center>\n".
5512                       "<b>No such projects found</b><br />\n".
5513                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5514                       "</center>\n<br />\n";
5515                 return;
5516         }
5517
5518         @projects = sort_projects_list(\@projects, $order);
5519
5520         if ($show_ctags) {
5521                 my $ctags = git_gather_all_ctags(\@projects);
5522                 my $cloud = git_populate_project_tagcloud($ctags);
5523                 print git_show_project_tagcloud($cloud, 64);
5524         }
5525
5526         print "<table class=\"project_list\">\n";
5527         unless ($no_header) {
5528                 print "<tr>\n";
5529                 if ($check_forks) {
5530                         print "<th></th>\n";
5531                 }
5532                 print_sort_th('project', $order, 'Project');
5533                 print_sort_th('descr', $order, 'Description');
5534                 print_sort_th('owner', $order, 'Owner');
5535                 print_sort_th('age', $order, 'Last Change');
5536                 print "<th></th>\n" . # for links
5537                       "</tr>\n";
5538         }
5539
5540         if ($projects_list_group_categories) {
5541                 # only display categories with projects in the $from-$to window
5542                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5543                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5544                 foreach my $cat (sort keys %categories) {
5545                         unless ($cat eq "") {
5546                                 print "<tr>\n";
5547                                 if ($check_forks) {
5548                                         print "<td></td>\n";
5549                                 }
5550                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5551                                 print "</tr>\n";
5552                         }
5553
5554                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5555                 }
5556         } else {
5557                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5558         }
5559
5560         if (defined $extra) {
5561                 print "<tr>\n";
5562                 if ($check_forks) {
5563                         print "<td></td>\n";
5564                 }
5565                 print "<td colspan=\"5\">$extra</td>\n" .
5566                       "</tr>\n";
5567         }
5568         print "</table>\n";
5569 }
5570
5571 sub git_log_body {
5572         # uses global variable $project
5573         my ($commitlist, $from, $to, $refs, $extra) = @_;
5574
5575         $from = 0 unless defined $from;
5576         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5577
5578         for (my $i = 0; $i <= $to; $i++) {
5579                 my %co = %{$commitlist->[$i]};
5580                 next if !%co;
5581                 my $commit = $co{'id'};
5582                 my $ref = format_ref_marker($refs, $commit);
5583                 git_print_header_div('commit',
5584                                "<span class=\"age\">$co{'age_string'}</span>" .
5585                                esc_html($co{'title'}) . $ref,
5586                                $commit);
5587                 print "<div class=\"title_text\">\n" .
5588                       "<div class=\"log_link\">\n" .
5589                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5590                       " | " .
5591                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5592                       " | " .
5593                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5594                       "<br/>\n" .
5595                       "</div>\n";
5596                       git_print_authorship(\%co, -tag => 'span');
5597                       print "<br/>\n</div>\n";
5598
5599                 print "<div class=\"log_body\">\n";
5600                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5601                 print "</div>\n";
5602         }
5603         if ($extra) {
5604                 print "<div class=\"page_nav\">\n";
5605                 print "$extra\n";
5606                 print "</div>\n";
5607         }
5608 }
5609
5610 sub git_shortlog_body {
5611         # uses global variable $project
5612         my ($commitlist, $from, $to, $refs, $extra) = @_;
5613
5614         $from = 0 unless defined $from;
5615         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5616
5617         print "<table class=\"shortlog\">\n";
5618         my $alternate = 1;
5619         for (my $i = $from; $i <= $to; $i++) {
5620                 my %co = %{$commitlist->[$i]};
5621                 my $commit = $co{'id'};
5622                 my $ref = format_ref_marker($refs, $commit);
5623                 if ($alternate) {
5624                         print "<tr class=\"dark\">\n";
5625                 } else {
5626                         print "<tr class=\"light\">\n";
5627                 }
5628                 $alternate ^= 1;
5629                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5630                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5631                       format_author_html('td', \%co, 10) . "<td>";
5632                 print format_subject_html($co{'title'}, $co{'title_short'},
5633                                           href(action=>"commit", hash=>$commit), $ref);
5634                 print "</td>\n" .
5635                       "<td class=\"link\">" .
5636                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5637                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5638                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5639                 my $snapshot_links = format_snapshot_links($commit);
5640                 if (defined $snapshot_links) {
5641                         print " | " . $snapshot_links;
5642                 }
5643                 print "</td>\n" .
5644                       "</tr>\n";
5645         }
5646         if (defined $extra) {
5647                 print "<tr>\n" .
5648                       "<td colspan=\"4\">$extra</td>\n" .
5649                       "</tr>\n";
5650         }
5651         print "</table>\n";
5652 }
5653
5654 sub git_history_body {
5655         # Warning: assumes constant type (blob or tree) during history
5656         my ($commitlist, $from, $to, $refs, $extra,
5657             $file_name, $file_hash, $ftype) = @_;
5658
5659         $from = 0 unless defined $from;
5660         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5661
5662         print "<table class=\"history\">\n";
5663         my $alternate = 1;
5664         for (my $i = $from; $i <= $to; $i++) {
5665                 my %co = %{$commitlist->[$i]};
5666                 if (!%co) {
5667                         next;
5668                 }
5669                 my $commit = $co{'id'};
5670
5671                 my $ref = format_ref_marker($refs, $commit);
5672
5673                 if ($alternate) {
5674                         print "<tr class=\"dark\">\n";
5675                 } else {
5676                         print "<tr class=\"light\">\n";
5677                 }
5678                 $alternate ^= 1;
5679                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5680         # shortlog:   format_author_html('td', \%co, 10)
5681                       format_author_html('td', \%co, 15, 3) . "<td>";
5682                 # originally git_history used chop_str($co{'title'}, 50)
5683                 print format_subject_html($co{'title'}, $co{'title_short'},
5684                                           href(action=>"commit", hash=>$commit), $ref);
5685                 print "</td>\n" .
5686                       "<td class=\"link\">" .
5687                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5688                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5689
5690                 if ($ftype eq 'blob') {
5691                         my $blob_current = $file_hash;
5692                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5693                         if (defined $blob_current && defined $blob_parent &&
5694                                         $blob_current ne $blob_parent) {
5695                                 print " | " .
5696                                         $cgi->a({-href => href(action=>"blobdiff",
5697                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5698                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5699                                                                file_name=>$file_name)},
5700                                                 "diff to current");
5701                         }
5702                 }
5703                 print "</td>\n" .
5704                       "</tr>\n";
5705         }
5706         if (defined $extra) {
5707                 print "<tr>\n" .
5708                       "<td colspan=\"4\">$extra</td>\n" .
5709                       "</tr>\n";
5710         }
5711         print "</table>\n";
5712 }
5713
5714 sub git_tags_body {
5715         # uses global variable $project
5716         my ($taglist, $from, $to, $extra) = @_;
5717         $from = 0 unless defined $from;
5718         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5719
5720         print "<table class=\"tags\">\n";
5721         my $alternate = 1;
5722         for (my $i = $from; $i <= $to; $i++) {
5723                 my $entry = $taglist->[$i];
5724                 my %tag = %$entry;
5725                 my $comment = $tag{'subject'};
5726                 my $comment_short;
5727                 if (defined $comment) {
5728                         $comment_short = chop_str($comment, 30, 5);
5729                 }
5730                 if ($alternate) {
5731                         print "<tr class=\"dark\">\n";
5732                 } else {
5733                         print "<tr class=\"light\">\n";
5734                 }
5735                 $alternate ^= 1;
5736                 if (defined $tag{'age'}) {
5737                         print "<td><i>$tag{'age'}</i></td>\n";
5738                 } else {
5739                         print "<td></td>\n";
5740                 }
5741                 print "<td>" .
5742                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5743                                -class => "list name"}, esc_html($tag{'name'})) .
5744                       "</td>\n" .
5745                       "<td>";
5746                 if (defined $comment) {
5747                         print format_subject_html($comment, $comment_short,
5748                                                   href(action=>"tag", hash=>$tag{'id'}));
5749                 }
5750                 print "</td>\n" .
5751                       "<td class=\"selflink\">";
5752                 if ($tag{'type'} eq "tag") {
5753                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5754                 } else {
5755                         print "&nbsp;";
5756                 }
5757                 print "</td>\n" .
5758                       "<td class=\"link\">" . " | " .
5759                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5760                 if ($tag{'reftype'} eq "commit") {
5761                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5762                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5763                 } elsif ($tag{'reftype'} eq "blob") {
5764                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5765                 }
5766                 print "</td>\n" .
5767                       "</tr>";
5768         }
5769         if (defined $extra) {
5770                 print "<tr>\n" .
5771                       "<td colspan=\"5\">$extra</td>\n" .
5772                       "</tr>\n";
5773         }
5774         print "</table>\n";
5775 }
5776
5777 sub git_heads_body {
5778         # uses global variable $project
5779         my ($headlist, $head_at, $from, $to, $extra) = @_;
5780         $from = 0 unless defined $from;
5781         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5782
5783         print "<table class=\"heads\">\n";
5784         my $alternate = 1;
5785         for (my $i = $from; $i <= $to; $i++) {
5786                 my $entry = $headlist->[$i];
5787                 my %ref = %$entry;
5788                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5789                 if ($alternate) {
5790                         print "<tr class=\"dark\">\n";
5791                 } else {
5792                         print "<tr class=\"light\">\n";
5793                 }
5794                 $alternate ^= 1;
5795                 print "<td><i>$ref{'age'}</i></td>\n" .
5796                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5797                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5798                                -class => "list name"},esc_html($ref{'name'})) .
5799                       "</td>\n" .
5800                       "<td class=\"link\">" .
5801                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5802                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5803                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5804                       "</td>\n" .
5805                       "</tr>";
5806         }
5807         if (defined $extra) {
5808                 print "<tr>\n" .
5809                       "<td colspan=\"3\">$extra</td>\n" .
5810                       "</tr>\n";
5811         }
5812         print "</table>\n";
5813 }
5814
5815 # Display a single remote block
5816 sub git_remote_block {
5817         my ($remote, $rdata, $limit, $head) = @_;
5818
5819         my $heads = $rdata->{'heads'};
5820         my $fetch = $rdata->{'fetch'};
5821         my $push = $rdata->{'push'};
5822
5823         my $urls_table = "<table class=\"projects_list\">\n" ;
5824
5825         if (defined $fetch) {
5826                 if ($fetch eq $push) {
5827                         $urls_table .= format_repo_url("URL", $fetch);
5828                 } else {
5829                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5830                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5831                 }
5832         } elsif (defined $push) {
5833                 $urls_table .= format_repo_url("Push URL", $push);
5834         } else {
5835                 $urls_table .= format_repo_url("", "No remote URL");
5836         }
5837
5838         $urls_table .= "</table>\n";
5839
5840         my $dots;
5841         if (defined $limit && $limit < @$heads) {
5842                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5843         }
5844
5845         print $urls_table;
5846         git_heads_body($heads, $head, 0, $limit, $dots);
5847 }
5848
5849 # Display a list of remote names with the respective fetch and push URLs
5850 sub git_remotes_list {
5851         my ($remotedata, $limit) = @_;
5852         print "<table class=\"heads\">\n";
5853         my $alternate = 1;
5854         my @remotes = sort keys %$remotedata;
5855
5856         my $limited = $limit && $limit < @remotes;
5857
5858         $#remotes = $limit - 1 if $limited;
5859
5860         while (my $remote = shift @remotes) {
5861                 my $rdata = $remotedata->{$remote};
5862                 my $fetch = $rdata->{'fetch'};
5863                 my $push = $rdata->{'push'};
5864                 if ($alternate) {
5865                         print "<tr class=\"dark\">\n";
5866                 } else {
5867                         print "<tr class=\"light\">\n";
5868                 }
5869                 $alternate ^= 1;
5870                 print "<td>" .
5871                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5872                                -class=> "list name"},esc_html($remote)) .
5873                       "</td>";
5874                 print "<td class=\"link\">" .
5875                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5876                       " | " .
5877                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5878                       "</td>";
5879
5880                 print "</tr>\n";
5881         }
5882
5883         if ($limited) {
5884                 print "<tr>\n" .
5885                       "<td colspan=\"3\">" .
5886                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5887                       "</td>\n" . "</tr>\n";
5888         }
5889
5890         print "</table>";
5891 }
5892
5893 # Display remote heads grouped by remote, unless there are too many
5894 # remotes, in which case we only display the remote names
5895 sub git_remotes_body {
5896         my ($remotedata, $limit, $head) = @_;
5897         if ($limit and $limit < keys %$remotedata) {
5898                 git_remotes_list($remotedata, $limit);
5899         } else {
5900                 fill_remote_heads($remotedata);
5901                 while (my ($remote, $rdata) = each %$remotedata) {
5902                         git_print_section({-class=>"remote", -id=>$remote},
5903                                 ["remotes", $remote, $remote], sub {
5904                                         git_remote_block($remote, $rdata, $limit, $head);
5905                                 });
5906                 }
5907         }
5908 }
5909
5910 sub git_search_message {
5911         my %co = @_;
5912
5913         my $greptype;
5914         if ($searchtype eq 'commit') {
5915                 $greptype = "--grep=";
5916         } elsif ($searchtype eq 'author') {
5917                 $greptype = "--author=";
5918         } elsif ($searchtype eq 'committer') {
5919                 $greptype = "--committer=";
5920         }
5921         $greptype .= $searchtext;
5922         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5923                                        $greptype, '--regexp-ignore-case',
5924                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5925
5926         my $paging_nav = '';
5927         if ($page > 0) {
5928                 $paging_nav .=
5929                         $cgi->a({-href => href(-replay=>1, page=>undef)},
5930                                 "first") .
5931                         " &sdot; " .
5932                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5933                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5934         } else {
5935                 $paging_nav .= "first &sdot; prev";
5936         }
5937         my $next_link = '';
5938         if ($#commitlist >= 100) {
5939                 $next_link =
5940                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5941                                  -accesskey => "n", -title => "Alt-n"}, "next");
5942                 $paging_nav .= " &sdot; $next_link";
5943         } else {
5944                 $paging_nav .= " &sdot; next";
5945         }
5946
5947         git_header_html();
5948
5949         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5950         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5951         if ($page == 0 && !@commitlist) {
5952                 print "<p>No match.</p>\n";
5953         } else {
5954                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5955         }
5956
5957         git_footer_html();
5958 }
5959
5960 sub git_search_changes {
5961         my %co = @_;
5962
5963         local $/ = "\n";
5964         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5965                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5966                 ($search_use_regexp ? '--pickaxe-regex' : ())
5967                         or die_error(500, "Open git-log failed");
5968
5969         git_header_html();
5970
5971         git_print_page_nav('','', $hash,$co{'tree'},$hash);
5972         git_print_header_div('commit', esc_html($co{'title'}), $hash);
5973
5974         print "<table class=\"pickaxe search\">\n";
5975         my $alternate = 1;
5976         undef %co;
5977         my @files;
5978         while (my $line = <$fd>) {
5979                 chomp $line;
5980                 next unless $line;
5981
5982                 my %set = parse_difftree_raw_line($line);
5983                 if (defined $set{'commit'}) {
5984                         # finish previous commit
5985                         if (%co) {
5986                                 print "</td>\n" .
5987                                       "<td class=\"link\">" .
5988                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5989                                               "commit") .
5990                                       " | " .
5991                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5992                                                              hash_base=>$co{'id'})},
5993                                               "tree") .
5994                                       "</td>\n" .
5995                                       "</tr>\n";
5996                         }
5997
5998                         if ($alternate) {
5999                                 print "<tr class=\"dark\">\n";
6000                         } else {
6001                                 print "<tr class=\"light\">\n";
6002                         }
6003                         $alternate ^= 1;
6004                         %co = parse_commit($set{'commit'});
6005                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6006                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6007                               "<td><i>$author</i></td>\n" .
6008                               "<td>" .
6009                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6010                                       -class => "list subject"},
6011                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6012                 } elsif (defined $set{'to_id'}) {
6013                         next if ($set{'to_id'} =~ m/^0{40}$/);
6014
6015                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6016                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6017                                       -class => "list"},
6018                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6019                               "<br/>\n";
6020                 }
6021         }
6022         close $fd;
6023
6024         # finish last commit (warning: repetition!)
6025         if (%co) {
6026                 print "</td>\n" .
6027                       "<td class=\"link\">" .
6028                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6029                               "commit") .
6030                       " | " .
6031                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6032                                              hash_base=>$co{'id'})},
6033                               "tree") .
6034                       "</td>\n" .
6035                       "</tr>\n";
6036         }
6037
6038         print "</table>\n";
6039
6040         git_footer_html();
6041 }
6042
6043 sub git_search_files {
6044         my %co = @_;
6045
6046         local $/ = "\n";
6047         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6048                 $search_use_regexp ? ('-E', '-i') : '-F',
6049                 $searchtext, $co{'tree'}
6050                         or die_error(500, "Open git-grep failed");
6051
6052         git_header_html();
6053
6054         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6055         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6056
6057         print "<table class=\"grep_search\">\n";
6058         my $alternate = 1;
6059         my $matches = 0;
6060         my $lastfile = '';
6061         my $file_href;
6062         while (my $line = <$fd>) {
6063                 chomp $line;
6064                 my ($file, $lno, $ltext, $binary);
6065                 last if ($matches++ > 1000);
6066                 if ($line =~ /^Binary file (.+) matches$/) {
6067                         $file = $1;
6068                         $binary = 1;
6069                 } else {
6070                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6071                         $file =~ s/^$co{'tree'}://;
6072                 }
6073                 if ($file ne $lastfile) {
6074                         $lastfile and print "</td></tr>\n";
6075                         if ($alternate++) {
6076                                 print "<tr class=\"dark\">\n";
6077                         } else {
6078                                 print "<tr class=\"light\">\n";
6079                         }
6080                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6081                                           file_name=>$file);
6082                         print "<td class=\"list\">".
6083                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6084                         print "</td><td>\n";
6085                         $lastfile = $file;
6086                 }
6087                 if ($binary) {
6088                         print "<div class=\"binary\">Binary file</div>\n";
6089                 } else {
6090                         $ltext = untabify($ltext);
6091                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6092                                 $ltext = esc_html($1, -nbsp=>1);
6093                                 $ltext .= '<span class="match">';
6094                                 $ltext .= esc_html($2, -nbsp=>1);
6095                                 $ltext .= '</span>';
6096                                 $ltext .= esc_html($3, -nbsp=>1);
6097                         } else {
6098                                 $ltext = esc_html($ltext, -nbsp=>1);
6099                         }
6100                         print "<div class=\"pre\">" .
6101                                 $cgi->a({-href => $file_href.'#l'.$lno,
6102                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6103                                 ' ' .  $ltext . "</div>\n";
6104                 }
6105         }
6106         if ($lastfile) {
6107                 print "</td></tr>\n";
6108                 if ($matches > 1000) {
6109                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6110                 }
6111         } else {
6112                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6113         }
6114         close $fd;
6115
6116         print "</table>\n";
6117
6118         git_footer_html();
6119 }
6120
6121 sub git_search_grep_body {
6122         my ($commitlist, $from, $to, $extra) = @_;
6123         $from = 0 unless defined $from;
6124         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6125
6126         print "<table class=\"commit_search\">\n";
6127         my $alternate = 1;
6128         for (my $i = $from; $i <= $to; $i++) {
6129                 my %co = %{$commitlist->[$i]};
6130                 if (!%co) {
6131                         next;
6132                 }
6133                 my $commit = $co{'id'};
6134                 if ($alternate) {
6135                         print "<tr class=\"dark\">\n";
6136                 } else {
6137                         print "<tr class=\"light\">\n";
6138                 }
6139                 $alternate ^= 1;
6140                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6141                       format_author_html('td', \%co, 15, 5) .
6142                       "<td>" .
6143                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6144                                -class => "list subject"},
6145                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6146                 my $comment = $co{'comment'};
6147                 foreach my $line (@$comment) {
6148                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6149                                 my ($lead, $match, $trail) = ($1, $2, $3);
6150                                 $match = chop_str($match, 70, 5, 'center');
6151                                 my $contextlen = int((80 - length($match))/2);
6152                                 $contextlen = 30 if ($contextlen > 30);
6153                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6154                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6155
6156                                 $lead  = esc_html($lead);
6157                                 $match = esc_html($match);
6158                                 $trail = esc_html($trail);
6159
6160                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6161                         }
6162                 }
6163                 print "</td>\n" .
6164                       "<td class=\"link\">" .
6165                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6166                       " | " .
6167                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6168                       " | " .
6169                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6170                 print "</td>\n" .
6171                       "</tr>\n";
6172         }
6173         if (defined $extra) {
6174                 print "<tr>\n" .
6175                       "<td colspan=\"3\">$extra</td>\n" .
6176                       "</tr>\n";
6177         }
6178         print "</table>\n";
6179 }
6180
6181 ## ======================================================================
6182 ## ======================================================================
6183 ## actions
6184
6185 sub git_project_list {
6186         my $order = $input_params{'order'};
6187         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6188                 die_error(400, "Unknown order parameter");
6189         }
6190
6191         my @list = git_get_projects_list($project_filter, $strict_export);
6192         if (!@list) {
6193                 die_error(404, "No projects found");
6194         }
6195
6196         git_header_html();
6197         if (defined $home_text && -f $home_text) {
6198                 print "<div class=\"index_include\">\n";
6199                 insert_file($home_text);
6200                 print "</div>\n";
6201         }
6202
6203         git_project_search_form($searchtext, $search_use_regexp);
6204         git_project_list_body(\@list, $order);
6205         git_footer_html();
6206 }
6207
6208 sub git_forks {
6209         my $order = $input_params{'order'};
6210         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6211                 die_error(400, "Unknown order parameter");
6212         }
6213
6214         my $filter = $project;
6215         $filter =~ s/\.git$//;
6216         my @list = git_get_projects_list($filter);
6217         if (!@list) {
6218                 die_error(404, "No forks found");
6219         }
6220
6221         git_header_html();
6222         git_print_page_nav('','');
6223         git_print_header_div('summary', "$project forks");
6224         git_project_list_body(\@list, $order);
6225         git_footer_html();
6226 }
6227
6228 sub git_project_index {
6229         my @projects = git_get_projects_list($project_filter, $strict_export);
6230         if (!@projects) {
6231                 die_error(404, "No projects found");
6232         }
6233
6234         print $cgi->header(
6235                 -type => 'text/plain',
6236                 -charset => 'utf-8',
6237                 -content_disposition => 'inline; filename="index.aux"');
6238
6239         foreach my $pr (@projects) {
6240                 if (!exists $pr->{'owner'}) {
6241                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6242                 }
6243
6244                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6245                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6246                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6247                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6248                 $path  =~ s/ /\+/g;
6249                 $owner =~ s/ /\+/g;
6250
6251                 print "$path $owner\n";
6252         }
6253 }
6254
6255 sub git_summary {
6256         my $descr = git_get_project_description($project) || "none";
6257         my %co = parse_commit("HEAD");
6258         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6259         my $head = $co{'id'};
6260         my $remote_heads = gitweb_check_feature('remote_heads');
6261
6262         my $owner = git_get_project_owner($project);
6263
6264         my $refs = git_get_references();
6265         # These get_*_list functions return one more to allow us to see if
6266         # there are more ...
6267         my @taglist  = git_get_tags_list(16);
6268         my @headlist = git_get_heads_list(16);
6269         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6270         my @forklist;
6271         my $check_forks = gitweb_check_feature('forks');
6272
6273         if ($check_forks) {
6274                 # find forks of a project
6275                 my $filter = $project;
6276                 $filter =~ s/\.git$//;
6277                 @forklist = git_get_projects_list($filter);
6278                 # filter out forks of forks
6279                 @forklist = filter_forks_from_projects_list(\@forklist)
6280                         if (@forklist);
6281         }
6282
6283         git_header_html();
6284         git_print_page_nav('summary','', $head);
6285
6286         print "<div class=\"title\">&nbsp;</div>\n";
6287         print "<table class=\"projects_list\">\n" .
6288               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6289               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6290         if (defined $cd{'rfc2822'}) {
6291                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6292                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6293         }
6294
6295         # use per project git URL list in $projectroot/$project/cloneurl
6296         # or make project git URL from git base URL and project name
6297         my $url_tag = "URL";
6298         my @url_list = git_get_project_url_list($project);
6299         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6300         foreach my $git_url (@url_list) {
6301                 next unless $git_url;
6302                 print format_repo_url($url_tag, $git_url);
6303                 $url_tag = "";
6304         }
6305
6306         # Tag cloud
6307         my $show_ctags = gitweb_check_feature('ctags');
6308         if ($show_ctags) {
6309                 my $ctags = git_get_project_ctags($project);
6310                 if (%$ctags) {
6311                         # without ability to add tags, don't show if there are none
6312                         my $cloud = git_populate_project_tagcloud($ctags);
6313                         print "<tr id=\"metadata_ctags\">" .
6314                               "<td>content tags</td>" .
6315                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6316                               "</tr>\n";
6317                 }
6318         }
6319
6320         print "</table>\n";
6321
6322         # If XSS prevention is on, we don't include README.html.
6323         # TODO: Allow a readme in some safe format.
6324         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6325                 print "<div class=\"title\">readme</div>\n" .
6326                       "<div class=\"readme\">\n";
6327                 insert_file("$projectroot/$project/README.html");
6328                 print "\n</div>\n"; # class="readme"
6329         }
6330
6331         # we need to request one more than 16 (0..15) to check if
6332         # those 16 are all
6333         my @commitlist = $head ? parse_commits($head, 17) : ();
6334         if (@commitlist) {
6335                 git_print_header_div('shortlog');
6336                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6337                                   $#commitlist <=  15 ? undef :
6338                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6339         }
6340
6341         if (@taglist) {
6342                 git_print_header_div('tags');
6343                 git_tags_body(\@taglist, 0, 15,
6344                               $#taglist <=  15 ? undef :
6345                               $cgi->a({-href => href(action=>"tags")}, "..."));
6346         }
6347
6348         if (@headlist) {
6349                 git_print_header_div('heads');
6350                 git_heads_body(\@headlist, $head, 0, 15,
6351                                $#headlist <= 15 ? undef :
6352                                $cgi->a({-href => href(action=>"heads")}, "..."));
6353         }
6354
6355         if (%remotedata) {
6356                 git_print_header_div('remotes');
6357                 git_remotes_body(\%remotedata, 15, $head);
6358         }
6359
6360         if (@forklist) {
6361                 git_print_header_div('forks');
6362                 git_project_list_body(\@forklist, 'age', 0, 15,
6363                                       $#forklist <= 15 ? undef :
6364                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6365                                       'no_header');
6366         }
6367
6368         git_footer_html();
6369 }
6370
6371 sub git_tag {
6372         my %tag = parse_tag($hash);
6373
6374         if (! %tag) {
6375                 die_error(404, "Unknown tag object");
6376         }
6377
6378         my $head = git_get_head_hash($project);
6379         git_header_html();
6380         git_print_page_nav('','', $head,undef,$head);
6381         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6382         print "<div class=\"title_text\">\n" .
6383               "<table class=\"object_header\">\n" .
6384               "<tr>\n" .
6385               "<td>object</td>\n" .
6386               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6387                                $tag{'object'}) . "</td>\n" .
6388               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6389                                               $tag{'type'}) . "</td>\n" .
6390               "</tr>\n";
6391         if (defined($tag{'author'})) {
6392                 git_print_authorship_rows(\%tag, 'author');
6393         }
6394         print "</table>\n\n" .
6395               "</div>\n";
6396         print "<div class=\"page_body\">";
6397         my $comment = $tag{'comment'};
6398         foreach my $line (@$comment) {
6399                 chomp $line;
6400                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6401         }
6402         print "</div>\n";
6403         git_footer_html();
6404 }
6405
6406 sub git_blame_common {
6407         my $format = shift || 'porcelain';
6408         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6409                 $format = 'incremental';
6410                 $action = 'blame_incremental'; # for page title etc
6411         }
6412
6413         # permissions
6414         gitweb_check_feature('blame')
6415                 or die_error(403, "Blame view not allowed");
6416
6417         # error checking
6418         die_error(400, "No file name given") unless $file_name;
6419         $hash_base ||= git_get_head_hash($project);
6420         die_error(404, "Couldn't find base commit") unless $hash_base;
6421         my %co = parse_commit($hash_base)
6422                 or die_error(404, "Commit not found");
6423         my $ftype = "blob";
6424         if (!defined $hash) {
6425                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6426                         or die_error(404, "Error looking up file");
6427         } else {
6428                 $ftype = git_get_type($hash);
6429                 if ($ftype !~ "blob") {
6430                         die_error(400, "Object is not a blob");
6431                 }
6432         }
6433
6434         my $fd;
6435         if ($format eq 'incremental') {
6436                 # get file contents (as base)
6437                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6438                         or die_error(500, "Open git-cat-file failed");
6439         } elsif ($format eq 'data') {
6440                 # run git-blame --incremental
6441                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6442                         $hash_base, "--", $file_name
6443                         or die_error(500, "Open git-blame --incremental failed");
6444         } else {
6445                 # run git-blame --porcelain
6446                 open $fd, "-|", git_cmd(), "blame", '-p',
6447                         $hash_base, '--', $file_name
6448                         or die_error(500, "Open git-blame --porcelain failed");
6449         }
6450
6451         # incremental blame data returns early
6452         if ($format eq 'data') {
6453                 print $cgi->header(
6454                         -type=>"text/plain", -charset => "utf-8",
6455                         -status=> "200 OK");
6456                 local $| = 1; # output autoflush
6457                 while (my $line = <$fd>) {
6458                         print to_utf8($line);
6459                 }
6460                 close $fd
6461                         or print "ERROR $!\n";
6462
6463                 print 'END';
6464                 if (defined $t0 && gitweb_check_feature('timed')) {
6465                         print ' '.
6466                               tv_interval($t0, [ gettimeofday() ]).
6467                               ' '.$number_of_git_cmds;
6468                 }
6469                 print "\n";
6470
6471                 return;
6472         }
6473
6474         # page header
6475         git_header_html();
6476         my $formats_nav =
6477                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6478                         "blob") .
6479                 " | ";
6480         if ($format eq 'incremental') {
6481                 $formats_nav .=
6482                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6483                                 "blame") . " (non-incremental)";
6484         } else {
6485                 $formats_nav .=
6486                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6487                                 "blame") . " (incremental)";
6488         }
6489         $formats_nav .=
6490                 " | " .
6491                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6492                         "history") .
6493                 " | " .
6494                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6495                         "HEAD");
6496         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6497         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6498         git_print_page_path($file_name, $ftype, $hash_base);
6499
6500         # page body
6501         if ($format eq 'incremental') {
6502                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6503                       "This page requires JavaScript to run.\n Use ".
6504                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6505                               'this page').
6506                       " instead.\n".
6507                       "</b></center></div>\n</noscript>\n";
6508
6509                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6510         }
6511
6512         print qq!<div class="page_body">\n!;
6513         print qq!<div id="progress_info">... / ...</div>\n!
6514                 if ($format eq 'incremental');
6515         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6516               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6517               qq!<thead>\n!.
6518               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6519               qq!</thead>\n!.
6520               qq!<tbody>\n!;
6521
6522         my @rev_color = qw(light dark);
6523         my $num_colors = scalar(@rev_color);
6524         my $current_color = 0;
6525
6526         if ($format eq 'incremental') {
6527                 my $color_class = $rev_color[$current_color];
6528
6529                 #contents of a file
6530                 my $linenr = 0;
6531         LINE:
6532                 while (my $line = <$fd>) {
6533                         chomp $line;
6534                         $linenr++;
6535
6536                         print qq!<tr id="l$linenr" class="$color_class">!.
6537                               qq!<td class="sha1"><a href=""> </a></td>!.
6538                               qq!<td class="linenr">!.
6539                               qq!<a class="linenr" href="">$linenr</a></td>!;
6540                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6541                         print qq!</tr>\n!;
6542                 }
6543
6544         } else { # porcelain, i.e. ordinary blame
6545                 my %metainfo = (); # saves information about commits
6546
6547                 # blame data
6548         LINE:
6549                 while (my $line = <$fd>) {
6550                         chomp $line;
6551                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6552                         # no <lines in group> for subsequent lines in group of lines
6553                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6554                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6555                         if (!exists $metainfo{$full_rev}) {
6556                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6557                         }
6558                         my $meta = $metainfo{$full_rev};
6559                         my $data;
6560                         while ($data = <$fd>) {
6561                                 chomp $data;
6562                                 last if ($data =~ s/^\t//); # contents of line
6563                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6564                                         $meta->{$1} = $2 unless exists $meta->{$1};
6565                                 }
6566                                 if ($data =~ /^previous /) {
6567                                         $meta->{'nprevious'}++;
6568                                 }
6569                         }
6570                         my $short_rev = substr($full_rev, 0, 8);
6571                         my $author = $meta->{'author'};
6572                         my %date =
6573                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6574                         my $date = $date{'iso-tz'};
6575                         if ($group_size) {
6576                                 $current_color = ($current_color + 1) % $num_colors;
6577                         }
6578                         my $tr_class = $rev_color[$current_color];
6579                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6580                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6581                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6582                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6583                         if ($group_size) {
6584                                 print "<td class=\"sha1\"";
6585                                 print " title=\"". esc_html($author) . ", $date\"";
6586                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6587                                 print ">";
6588                                 print $cgi->a({-href => href(action=>"commit",
6589                                                              hash=>$full_rev,
6590                                                              file_name=>$file_name)},
6591                                               esc_html($short_rev));
6592                                 if ($group_size >= 2) {
6593                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6594                                         if (@author_initials) {
6595                                                 print "<br />" .
6596                                                       esc_html(join('', @author_initials));
6597                                                 #           or join('.', ...)
6598                                         }
6599                                 }
6600                                 print "</td>\n";
6601                         }
6602                         # 'previous' <sha1 of parent commit> <filename at commit>
6603                         if (exists $meta->{'previous'} &&
6604                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6605                                 $meta->{'parent'} = $1;
6606                                 $meta->{'file_parent'} = unquote($2);
6607                         }
6608                         my $linenr_commit =
6609                                 exists($meta->{'parent'}) ?
6610                                 $meta->{'parent'} : $full_rev;
6611                         my $linenr_filename =
6612                                 exists($meta->{'file_parent'}) ?
6613                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6614                         my $blamed = href(action => 'blame',
6615                                           file_name => $linenr_filename,
6616                                           hash_base => $linenr_commit);
6617                         print "<td class=\"linenr\">";
6618                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6619                                         -class => "linenr" },
6620                                       esc_html($lineno));
6621                         print "</td>";
6622                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6623                         print "</tr>\n";
6624                 } # end while
6625
6626         }
6627
6628         # footer
6629         print "</tbody>\n".
6630               "</table>\n"; # class="blame"
6631         print "</div>\n";   # class="blame_body"
6632         close $fd
6633                 or print "Reading blob failed\n";
6634
6635         git_footer_html();
6636 }
6637
6638 sub git_blame {
6639         git_blame_common();
6640 }
6641
6642 sub git_blame_incremental {
6643         git_blame_common('incremental');
6644 }
6645
6646 sub git_blame_data {
6647         git_blame_common('data');
6648 }
6649
6650 sub git_tags {
6651         my $head = git_get_head_hash($project);
6652         git_header_html();
6653         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6654         git_print_header_div('summary', $project);
6655
6656         my @tagslist = git_get_tags_list();
6657         if (@tagslist) {
6658                 git_tags_body(\@tagslist);
6659         }
6660         git_footer_html();
6661 }
6662
6663 sub git_heads {
6664         my $head = git_get_head_hash($project);
6665         git_header_html();
6666         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6667         git_print_header_div('summary', $project);
6668
6669         my @headslist = git_get_heads_list();
6670         if (@headslist) {
6671                 git_heads_body(\@headslist, $head);
6672         }
6673         git_footer_html();
6674 }
6675
6676 # used both for single remote view and for list of all the remotes
6677 sub git_remotes {
6678         gitweb_check_feature('remote_heads')
6679                 or die_error(403, "Remote heads view is disabled");
6680
6681         my $head = git_get_head_hash($project);
6682         my $remote = $input_params{'hash'};
6683
6684         my $remotedata = git_get_remotes_list($remote);
6685         die_error(500, "Unable to get remote information") unless defined $remotedata;
6686
6687         unless (%$remotedata) {
6688                 die_error(404, defined $remote ?
6689                         "Remote $remote not found" :
6690                         "No remotes found");
6691         }
6692
6693         git_header_html(undef, undef, -action_extra => $remote);
6694         git_print_page_nav('', '',  $head, undef, $head,
6695                 format_ref_views($remote ? '' : 'remotes'));
6696
6697         fill_remote_heads($remotedata);
6698         if (defined $remote) {
6699                 git_print_header_div('remotes', "$remote remote for $project");
6700                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6701         } else {
6702                 git_print_header_div('summary', "$project remotes");
6703                 git_remotes_body($remotedata, undef, $head);
6704         }
6705
6706         git_footer_html();
6707 }
6708
6709 sub git_blob_plain {
6710         my $type = shift;
6711         my $expires;
6712
6713         if (!defined $hash) {
6714                 if (defined $file_name) {
6715                         my $base = $hash_base || git_get_head_hash($project);
6716                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6717                                 or die_error(404, "Cannot find file");
6718                 } else {
6719                         die_error(400, "No file name defined");
6720                 }
6721         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6722                 # blobs defined by non-textual hash id's can be cached
6723                 $expires = "+1d";
6724         }
6725
6726         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6727                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6728
6729         # content-type (can include charset)
6730         $type = blob_contenttype($fd, $file_name, $type);
6731
6732         # "save as" filename, even when no $file_name is given
6733         my $save_as = "$hash";
6734         if (defined $file_name) {
6735                 $save_as = $file_name;
6736         } elsif ($type =~ m/^text\//) {
6737                 $save_as .= '.txt';
6738         }
6739
6740         # With XSS prevention on, blobs of all types except a few known safe
6741         # ones are served with "Content-Disposition: attachment" to make sure
6742         # they don't run in our security domain.  For certain image types,
6743         # blob view writes an <img> tag referring to blob_plain view, and we
6744         # want to be sure not to break that by serving the image as an
6745         # attachment (though Firefox 3 doesn't seem to care).
6746         my $sandbox = $prevent_xss &&
6747                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6748
6749         # serve text/* as text/plain
6750         if ($prevent_xss &&
6751             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6752              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6753                 my $rest = $1;
6754                 $rest = defined $rest ? $rest : '';
6755                 $type = "text/plain$rest";
6756         }
6757
6758         print $cgi->header(
6759                 -type => $type,
6760                 -expires => $expires,
6761                 -content_disposition =>
6762                         ($sandbox ? 'attachment' : 'inline')
6763                         . '; filename="' . $save_as . '"');
6764         local $/ = undef;
6765         binmode STDOUT, ':raw';
6766         print <$fd>;
6767         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6768         close $fd;
6769 }
6770
6771 sub git_blob {
6772         my $expires;
6773
6774         if (!defined $hash) {
6775                 if (defined $file_name) {
6776                         my $base = $hash_base || git_get_head_hash($project);
6777                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6778                                 or die_error(404, "Cannot find file");
6779                 } else {
6780                         die_error(400, "No file name defined");
6781                 }
6782         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6783                 # blobs defined by non-textual hash id's can be cached
6784                 $expires = "+1d";
6785         }
6786
6787         my $have_blame = gitweb_check_feature('blame');
6788         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6789                 or die_error(500, "Couldn't cat $file_name, $hash");
6790         my $mimetype = blob_mimetype($fd, $file_name);
6791         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6792         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6793                 close $fd;
6794                 return git_blob_plain($mimetype);
6795         }
6796         # we can have blame only for text/* mimetype
6797         $have_blame &&= ($mimetype =~ m!^text/!);
6798
6799         my $highlight = gitweb_check_feature('highlight');
6800         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6801         $fd = run_highlighter($fd, $highlight, $syntax)
6802                 if $syntax;
6803
6804         git_header_html(undef, $expires);
6805         my $formats_nav = '';
6806         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6807                 if (defined $file_name) {
6808                         if ($have_blame) {
6809                                 $formats_nav .=
6810                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6811                                                 "blame") .
6812                                         " | ";
6813                         }
6814                         $formats_nav .=
6815                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6816                                         "history") .
6817                                 " | " .
6818                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6819                                         "raw") .
6820                                 " | " .
6821                                 $cgi->a({-href => href(action=>"blob",
6822                                                        hash_base=>"HEAD", file_name=>$file_name)},
6823                                         "HEAD");
6824                 } else {
6825                         $formats_nav .=
6826                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6827                                         "raw");
6828                 }
6829                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6830                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6831         } else {
6832                 print "<div class=\"page_nav\">\n" .
6833                       "<br/><br/></div>\n" .
6834                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6835         }
6836         git_print_page_path($file_name, "blob", $hash_base);
6837         print "<div class=\"page_body\">\n";
6838         if ($mimetype =~ m!^image/!) {
6839                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6840                 if ($file_name) {
6841                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6842                 }
6843                 print qq! src="! .
6844                       href(action=>"blob_plain", hash=>$hash,
6845                            hash_base=>$hash_base, file_name=>$file_name) .
6846                       qq!" />\n!;
6847         } else {
6848                 my $nr;
6849                 while (my $line = <$fd>) {
6850                         chomp $line;
6851                         $nr++;
6852                         $line = untabify($line);
6853                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6854                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6855                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6856                 }
6857         }
6858         close $fd
6859                 or print "Reading blob failed.\n";
6860         print "</div>";
6861         git_footer_html();
6862 }
6863
6864 sub git_tree {
6865         if (!defined $hash_base) {
6866                 $hash_base = "HEAD";
6867         }
6868         if (!defined $hash) {
6869                 if (defined $file_name) {
6870                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6871                 } else {
6872                         $hash = $hash_base;
6873                 }
6874         }
6875         die_error(404, "No such tree") unless defined($hash);
6876
6877         my $show_sizes = gitweb_check_feature('show-sizes');
6878         my $have_blame = gitweb_check_feature('blame');
6879
6880         my @entries = ();
6881         {
6882                 local $/ = "\0";
6883                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6884                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6885                         or die_error(500, "Open git-ls-tree failed");
6886                 @entries = map { chomp; $_ } <$fd>;
6887                 close $fd
6888                         or die_error(404, "Reading tree failed");
6889         }
6890
6891         my $refs = git_get_references();
6892         my $ref = format_ref_marker($refs, $hash_base);
6893         git_header_html();
6894         my $basedir = '';
6895         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6896                 my @views_nav = ();
6897                 if (defined $file_name) {
6898                         push @views_nav,
6899                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6900                                         "history"),
6901                                 $cgi->a({-href => href(action=>"tree",
6902                                                        hash_base=>"HEAD", file_name=>$file_name)},
6903                                         "HEAD"),
6904                 }
6905                 my $snapshot_links = format_snapshot_links($hash);
6906                 if (defined $snapshot_links) {
6907                         # FIXME: Should be available when we have no hash base as well.
6908                         push @views_nav, $snapshot_links;
6909                 }
6910                 git_print_page_nav('tree','', $hash_base, undef, undef,
6911                                    join(' | ', @views_nav));
6912                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6913         } else {
6914                 undef $hash_base;
6915                 print "<div class=\"page_nav\">\n";
6916                 print "<br/><br/></div>\n";
6917                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6918         }
6919         if (defined $file_name) {
6920                 $basedir = $file_name;
6921                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6922                         $basedir .= '/';
6923                 }
6924                 git_print_page_path($file_name, 'tree', $hash_base);
6925         }
6926         print "<div class=\"page_body\">\n";
6927         print "<table class=\"tree\">\n";
6928         my $alternate = 1;
6929         # '..' (top directory) link if possible
6930         if (defined $hash_base &&
6931             defined $file_name && $file_name =~ m![^/]+$!) {
6932                 if ($alternate) {
6933                         print "<tr class=\"dark\">\n";
6934                 } else {
6935                         print "<tr class=\"light\">\n";
6936                 }
6937                 $alternate ^= 1;
6938
6939                 my $up = $file_name;
6940                 $up =~ s!/?[^/]+$!!;
6941                 undef $up unless $up;
6942                 # based on git_print_tree_entry
6943                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6944                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6945                 print '<td class="list">';
6946                 print $cgi->a({-href => href(action=>"tree",
6947                                              hash_base=>$hash_base,
6948                                              file_name=>$up)},
6949                               "..");
6950                 print "</td>\n";
6951                 print "<td class=\"link\"></td>\n";
6952
6953                 print "</tr>\n";
6954         }
6955         foreach my $line (@entries) {
6956                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6957
6958                 if ($alternate) {
6959                         print "<tr class=\"dark\">\n";
6960                 } else {
6961                         print "<tr class=\"light\">\n";
6962                 }
6963                 $alternate ^= 1;
6964
6965                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6966
6967                 print "</tr>\n";
6968         }
6969         print "</table>\n" .
6970               "</div>";
6971         git_footer_html();
6972 }
6973
6974 sub snapshot_name {
6975         my ($project, $hash) = @_;
6976
6977         # path/to/project.git  -> project
6978         # path/to/project/.git -> project
6979         my $name = to_utf8($project);
6980         $name =~ s,([^/])/*\.git$,$1,;
6981         $name = basename($name);
6982         # sanitize name
6983         $name =~ s/[[:cntrl:]]/?/g;
6984
6985         my $ver = $hash;
6986         if ($hash =~ /^[0-9a-fA-F]+$/) {
6987                 # shorten SHA-1 hash
6988                 my $full_hash = git_get_full_hash($project, $hash);
6989                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6990                         $ver = git_get_short_hash($project, $hash);
6991                 }
6992         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6993                 # tags don't need shortened SHA-1 hash
6994                 $ver = $1;
6995         } else {
6996                 # branches and other need shortened SHA-1 hash
6997                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6998                         $ver = $1;
6999                 }
7000                 $ver .= '-' . git_get_short_hash($project, $hash);
7001         }
7002         # in case of hierarchical branch names
7003         $ver =~ s!/!.!g;
7004
7005         # name = project-version_string
7006         $name = "$name-$ver";
7007
7008         return wantarray ? ($name, $name) : $name;
7009 }
7010
7011 sub exit_if_unmodified_since {
7012         my ($latest_epoch) = @_;
7013         our $cgi;
7014
7015         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7016         if (defined $if_modified) {
7017                 my $since;
7018                 if (eval { require HTTP::Date; 1; }) {
7019                         $since = HTTP::Date::str2time($if_modified);
7020                 } elsif (eval { require Time::ParseDate; 1; }) {
7021                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7022                 }
7023                 if (defined $since && $latest_epoch <= $since) {
7024                         my %latest_date = parse_date($latest_epoch);
7025                         print $cgi->header(
7026                                 -last_modified => $latest_date{'rfc2822'},
7027                                 -status => '304 Not Modified');
7028                         goto DONE_GITWEB;
7029                 }
7030         }
7031 }
7032
7033 sub git_snapshot {
7034         my $format = $input_params{'snapshot_format'};
7035         if (!@snapshot_fmts) {
7036                 die_error(403, "Snapshots not allowed");
7037         }
7038         # default to first supported snapshot format
7039         $format ||= $snapshot_fmts[0];
7040         if ($format !~ m/^[a-z0-9]+$/) {
7041                 die_error(400, "Invalid snapshot format parameter");
7042         } elsif (!exists($known_snapshot_formats{$format})) {
7043                 die_error(400, "Unknown snapshot format");
7044         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7045                 die_error(403, "Snapshot format not allowed");
7046         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7047                 die_error(403, "Unsupported snapshot format");
7048         }
7049
7050         my $type = git_get_type("$hash^{}");
7051         if (!$type) {
7052                 die_error(404, 'Object does not exist');
7053         }  elsif ($type eq 'blob') {
7054                 die_error(400, 'Object is not a tree-ish');
7055         }
7056
7057         my ($name, $prefix) = snapshot_name($project, $hash);
7058         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7059
7060         my %co = parse_commit($hash);
7061         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7062
7063         my $cmd = quote_command(
7064                 git_cmd(), 'archive',
7065                 "--format=$known_snapshot_formats{$format}{'format'}",
7066                 "--prefix=$prefix/", $hash);
7067         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7068                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7069         }
7070
7071         $filename =~ s/(["\\])/\\$1/g;
7072         my %latest_date;
7073         if (%co) {
7074                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7075         }
7076
7077         print $cgi->header(
7078                 -type => $known_snapshot_formats{$format}{'type'},
7079                 -content_disposition => 'inline; filename="' . $filename . '"',
7080                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7081                 -status => '200 OK');
7082
7083         open my $fd, "-|", $cmd
7084                 or die_error(500, "Execute git-archive failed");
7085         binmode STDOUT, ':raw';
7086         print <$fd>;
7087         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7088         close $fd;
7089 }
7090
7091 sub git_log_generic {
7092         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7093
7094         my $head = git_get_head_hash($project);
7095         if (!defined $base) {
7096                 $base = $head;
7097         }
7098         if (!defined $page) {
7099                 $page = 0;
7100         }
7101         my $refs = git_get_references();
7102
7103         my $commit_hash = $base;
7104         if (defined $parent) {
7105                 $commit_hash = "$parent..$base";
7106         }
7107         my @commitlist =
7108                 parse_commits($commit_hash, 101, (100 * $page),
7109                               defined $file_name ? ($file_name, "--full-history") : ());
7110
7111         my $ftype;
7112         if (!defined $file_hash && defined $file_name) {
7113                 # some commits could have deleted file in question,
7114                 # and not have it in tree, but one of them has to have it
7115                 for (my $i = 0; $i < @commitlist; $i++) {
7116                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7117                         last if defined $file_hash;
7118                 }
7119         }
7120         if (defined $file_hash) {
7121                 $ftype = git_get_type($file_hash);
7122         }
7123         if (defined $file_name && !defined $ftype) {
7124                 die_error(500, "Unknown type of object");
7125         }
7126         my %co;
7127         if (defined $file_name) {
7128                 %co = parse_commit($base)
7129                         or die_error(404, "Unknown commit object");
7130         }
7131
7132
7133         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7134         my $next_link = '';
7135         if ($#commitlist >= 100) {
7136                 $next_link =
7137                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7138                                  -accesskey => "n", -title => "Alt-n"}, "next");
7139         }
7140         my $patch_max = gitweb_get_feature('patches');
7141         if ($patch_max && !defined $file_name) {
7142                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7143                         $paging_nav .= " &sdot; " .
7144                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7145                                         "patches");
7146                 }
7147         }
7148
7149         git_header_html();
7150         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7151         if (defined $file_name) {
7152                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7153         } else {
7154                 git_print_header_div('summary', $project)
7155         }
7156         git_print_page_path($file_name, $ftype, $hash_base)
7157                 if (defined $file_name);
7158
7159         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7160                      $file_name, $file_hash, $ftype);
7161
7162         git_footer_html();
7163 }
7164
7165 sub git_log {
7166         git_log_generic('log', \&git_log_body,
7167                         $hash, $hash_parent);
7168 }
7169
7170 sub git_commit {
7171         $hash ||= $hash_base || "HEAD";
7172         my %co = parse_commit($hash)
7173             or die_error(404, "Unknown commit object");
7174
7175         my $parent  = $co{'parent'};
7176         my $parents = $co{'parents'}; # listref
7177
7178         # we need to prepare $formats_nav before any parameter munging
7179         my $formats_nav;
7180         if (!defined $parent) {
7181                 # --root commitdiff
7182                 $formats_nav .= '(initial)';
7183         } elsif (@$parents == 1) {
7184                 # single parent commit
7185                 $formats_nav .=
7186                         '(parent: ' .
7187                         $cgi->a({-href => href(action=>"commit",
7188                                                hash=>$parent)},
7189                                 esc_html(substr($parent, 0, 7))) .
7190                         ')';
7191         } else {
7192                 # merge commit
7193                 $formats_nav .=
7194                         '(merge: ' .
7195                         join(' ', map {
7196                                 $cgi->a({-href => href(action=>"commit",
7197                                                        hash=>$_)},
7198                                         esc_html(substr($_, 0, 7)));
7199                         } @$parents ) .
7200                         ')';
7201         }
7202         if (gitweb_check_feature('patches') && @$parents <= 1) {
7203                 $formats_nav .= " | " .
7204                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7205                                 "patch");
7206         }
7207
7208         if (!defined $parent) {
7209                 $parent = "--root";
7210         }
7211         my @difftree;
7212         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7213                 @diff_opts,
7214                 (@$parents <= 1 ? $parent : '-c'),
7215                 $hash, "--"
7216                 or die_error(500, "Open git-diff-tree failed");
7217         @difftree = map { chomp; $_ } <$fd>;
7218         close $fd or die_error(404, "Reading git-diff-tree failed");
7219
7220         # non-textual hash id's can be cached
7221         my $expires;
7222         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7223                 $expires = "+1d";
7224         }
7225         my $refs = git_get_references();
7226         my $ref = format_ref_marker($refs, $co{'id'});
7227
7228         git_header_html(undef, $expires);
7229         git_print_page_nav('commit', '',
7230                            $hash, $co{'tree'}, $hash,
7231                            $formats_nav);
7232
7233         if (defined $co{'parent'}) {
7234                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7235         } else {
7236                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7237         }
7238         print "<div class=\"title_text\">\n" .
7239               "<table class=\"object_header\">\n";
7240         git_print_authorship_rows(\%co);
7241         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7242         print "<tr>" .
7243               "<td>tree</td>" .
7244               "<td class=\"sha1\">" .
7245               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7246                        class => "list"}, $co{'tree'}) .
7247               "</td>" .
7248               "<td class=\"link\">" .
7249               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7250                       "tree");
7251         my $snapshot_links = format_snapshot_links($hash);
7252         if (defined $snapshot_links) {
7253                 print " | " . $snapshot_links;
7254         }
7255         print "</td>" .
7256               "</tr>\n";
7257
7258         foreach my $par (@$parents) {
7259                 print "<tr>" .
7260                       "<td>parent</td>" .
7261                       "<td class=\"sha1\">" .
7262                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7263                                class => "list"}, $par) .
7264                       "</td>" .
7265                       "<td class=\"link\">" .
7266                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7267                       " | " .
7268                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7269                       "</td>" .
7270                       "</tr>\n";
7271         }
7272         print "</table>".
7273               "</div>\n";
7274
7275         print "<div class=\"page_body\">\n";
7276         git_print_log($co{'comment'});
7277         print "</div>\n";
7278
7279         git_difftree_body(\@difftree, $hash, @$parents);
7280
7281         git_footer_html();
7282 }
7283
7284 sub git_object {
7285         # object is defined by:
7286         # - hash or hash_base alone
7287         # - hash_base and file_name
7288         my $type;
7289
7290         # - hash or hash_base alone
7291         if ($hash || ($hash_base && !defined $file_name)) {
7292                 my $object_id = $hash || $hash_base;
7293
7294                 open my $fd, "-|", quote_command(
7295                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7296                         or die_error(404, "Object does not exist");
7297                 $type = <$fd>;
7298                 chomp $type;
7299                 close $fd
7300                         or die_error(404, "Object does not exist");
7301
7302         # - hash_base and file_name
7303         } elsif ($hash_base && defined $file_name) {
7304                 $file_name =~ s,/+$,,;
7305
7306                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7307                         or die_error(404, "Base object does not exist");
7308
7309                 # here errors should not hapen
7310                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7311                         or die_error(500, "Open git-ls-tree failed");
7312                 my $line = <$fd>;
7313                 close $fd;
7314
7315                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7316                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7317                         die_error(404, "File or directory for given base does not exist");
7318                 }
7319                 $type = $2;
7320                 $hash = $3;
7321         } else {
7322                 die_error(400, "Not enough information to find object");
7323         }
7324
7325         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7326                                           hash=>$hash, hash_base=>$hash_base,
7327                                           file_name=>$file_name),
7328                              -status => '302 Found');
7329 }
7330
7331 sub git_blobdiff {
7332         my $format = shift || 'html';
7333         my $diff_style = $input_params{'diff_style'} || 'inline';
7334
7335         my $fd;
7336         my @difftree;
7337         my %diffinfo;
7338         my $expires;
7339
7340         # preparing $fd and %diffinfo for git_patchset_body
7341         # new style URI
7342         if (defined $hash_base && defined $hash_parent_base) {
7343                 if (defined $file_name) {
7344                         # read raw output
7345                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7346                                 $hash_parent_base, $hash_base,
7347                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7348                                 or die_error(500, "Open git-diff-tree failed");
7349                         @difftree = map { chomp; $_ } <$fd>;
7350                         close $fd
7351                                 or die_error(404, "Reading git-diff-tree failed");
7352                         @difftree
7353                                 or die_error(404, "Blob diff not found");
7354
7355                 } elsif (defined $hash &&
7356                          $hash =~ /[0-9a-fA-F]{40}/) {
7357                         # try to find filename from $hash
7358
7359                         # read filtered raw output
7360                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7361                                 $hash_parent_base, $hash_base, "--"
7362                                 or die_error(500, "Open git-diff-tree failed");
7363                         @difftree =
7364                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7365                                 # $hash == to_id
7366                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7367                                 map { chomp; $_ } <$fd>;
7368                         close $fd
7369                                 or die_error(404, "Reading git-diff-tree failed");
7370                         @difftree
7371                                 or die_error(404, "Blob diff not found");
7372
7373                 } else {
7374                         die_error(400, "Missing one of the blob diff parameters");
7375                 }
7376
7377                 if (@difftree > 1) {
7378                         die_error(400, "Ambiguous blob diff specification");
7379                 }
7380
7381                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7382                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7383                 $file_name   ||= $diffinfo{'to_file'};
7384
7385                 $hash_parent ||= $diffinfo{'from_id'};
7386                 $hash        ||= $diffinfo{'to_id'};
7387
7388                 # non-textual hash id's can be cached
7389                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7390                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7391                         $expires = '+1d';
7392                 }
7393
7394                 # open patch output
7395                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7396                         '-p', ($format eq 'html' ? "--full-index" : ()),
7397                         $hash_parent_base, $hash_base,
7398                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7399                         or die_error(500, "Open git-diff-tree failed");
7400         }
7401
7402         # old/legacy style URI -- not generated anymore since 1.4.3.
7403         if (!%diffinfo) {
7404                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7405         }
7406
7407         # header
7408         if ($format eq 'html') {
7409                 my $formats_nav =
7410                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7411                                 "raw");
7412                 $formats_nav .= diff_style_nav($diff_style);
7413                 git_header_html(undef, $expires);
7414                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7415                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7416                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7417                 } else {
7418                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7419                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7420                 }
7421                 if (defined $file_name) {
7422                         git_print_page_path($file_name, "blob", $hash_base);
7423                 } else {
7424                         print "<div class=\"page_path\"></div>\n";
7425                 }
7426
7427         } elsif ($format eq 'plain') {
7428                 print $cgi->header(
7429                         -type => 'text/plain',
7430                         -charset => 'utf-8',
7431                         -expires => $expires,
7432                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7433
7434                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7435
7436         } else {
7437                 die_error(400, "Unknown blobdiff format");
7438         }
7439
7440         # patch
7441         if ($format eq 'html') {
7442                 print "<div class=\"page_body\">\n";
7443
7444                 git_patchset_body($fd, $diff_style,
7445                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7446                 close $fd;
7447
7448                 print "</div>\n"; # class="page_body"
7449                 git_footer_html();
7450
7451         } else {
7452                 while (my $line = <$fd>) {
7453                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7454                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7455
7456                         print $line;
7457
7458                         last if $line =~ m!^\+\+\+!;
7459                 }
7460                 local $/ = undef;
7461                 print <$fd>;
7462                 close $fd;
7463         }
7464 }
7465
7466 sub git_blobdiff_plain {
7467         git_blobdiff('plain');
7468 }
7469
7470 # assumes that it is added as later part of already existing navigation,
7471 # so it returns "| foo | bar" rather than just "foo | bar"
7472 sub diff_style_nav {
7473         my ($diff_style, $is_combined) = @_;
7474         $diff_style ||= 'inline';
7475
7476         return "" if ($is_combined);
7477
7478         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7479         my %styles = @styles;
7480         @styles =
7481                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7482
7483         return join '',
7484                 map { " | ".$_ }
7485                 map {
7486                         $_ eq $diff_style ? $styles{$_} :
7487                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7488                 } @styles;
7489 }
7490
7491 sub git_commitdiff {
7492         my %params = @_;
7493         my $format = $params{-format} || 'html';
7494         my $diff_style = $input_params{'diff_style'} || 'inline';
7495
7496         my ($patch_max) = gitweb_get_feature('patches');
7497         if ($format eq 'patch') {
7498                 die_error(403, "Patch view not allowed") unless $patch_max;
7499         }
7500
7501         $hash ||= $hash_base || "HEAD";
7502         my %co = parse_commit($hash)
7503             or die_error(404, "Unknown commit object");
7504
7505         # choose format for commitdiff for merge
7506         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7507                 $hash_parent = '--cc';
7508         }
7509         # we need to prepare $formats_nav before almost any parameter munging
7510         my $formats_nav;
7511         if ($format eq 'html') {
7512                 $formats_nav =
7513                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7514                                 "raw");
7515                 if ($patch_max && @{$co{'parents'}} <= 1) {
7516                         $formats_nav .= " | " .
7517                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7518                                         "patch");
7519                 }
7520                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7521
7522                 if (defined $hash_parent &&
7523                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7524                         # commitdiff with two commits given
7525                         my $hash_parent_short = $hash_parent;
7526                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7527                                 $hash_parent_short = substr($hash_parent, 0, 7);
7528                         }
7529                         $formats_nav .=
7530                                 ' (from';
7531                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7532                                 if ($co{'parents'}[$i] eq $hash_parent) {
7533                                         $formats_nav .= ' parent ' . ($i+1);
7534                                         last;
7535                                 }
7536                         }
7537                         $formats_nav .= ': ' .
7538                                 $cgi->a({-href => href(-replay=>1,
7539                                                        hash=>$hash_parent, hash_base=>undef)},
7540                                         esc_html($hash_parent_short)) .
7541                                 ')';
7542                 } elsif (!$co{'parent'}) {
7543                         # --root commitdiff
7544                         $formats_nav .= ' (initial)';
7545                 } elsif (scalar @{$co{'parents'}} == 1) {
7546                         # single parent commit
7547                         $formats_nav .=
7548                                 ' (parent: ' .
7549                                 $cgi->a({-href => href(-replay=>1,
7550                                                        hash=>$co{'parent'}, hash_base=>undef)},
7551                                         esc_html(substr($co{'parent'}, 0, 7))) .
7552                                 ')';
7553                 } else {
7554                         # merge commit
7555                         if ($hash_parent eq '--cc') {
7556                                 $formats_nav .= ' | ' .
7557                                         $cgi->a({-href => href(-replay=>1,
7558                                                                hash=>$hash, hash_parent=>'-c')},
7559                                                 'combined');
7560                         } else { # $hash_parent eq '-c'
7561                                 $formats_nav .= ' | ' .
7562                                         $cgi->a({-href => href(-replay=>1,
7563                                                                hash=>$hash, hash_parent=>'--cc')},
7564                                                 'compact');
7565                         }
7566                         $formats_nav .=
7567                                 ' (merge: ' .
7568                                 join(' ', map {
7569                                         $cgi->a({-href => href(-replay=>1,
7570                                                                hash=>$_, hash_base=>undef)},
7571                                                 esc_html(substr($_, 0, 7)));
7572                                 } @{$co{'parents'}} ) .
7573                                 ')';
7574                 }
7575         }
7576
7577         my $hash_parent_param = $hash_parent;
7578         if (!defined $hash_parent_param) {
7579                 # --cc for multiple parents, --root for parentless
7580                 $hash_parent_param =
7581                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7582         }
7583
7584         # read commitdiff
7585         my $fd;
7586         my @difftree;
7587         if ($format eq 'html') {
7588                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7589                         "--no-commit-id", "--patch-with-raw", "--full-index",
7590                         $hash_parent_param, $hash, "--"
7591                         or die_error(500, "Open git-diff-tree failed");
7592
7593                 while (my $line = <$fd>) {
7594                         chomp $line;
7595                         # empty line ends raw part of diff-tree output
7596                         last unless $line;
7597                         push @difftree, scalar parse_difftree_raw_line($line);
7598                 }
7599
7600         } elsif ($format eq 'plain') {
7601                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7602                         '-p', $hash_parent_param, $hash, "--"
7603                         or die_error(500, "Open git-diff-tree failed");
7604         } elsif ($format eq 'patch') {
7605                 # For commit ranges, we limit the output to the number of
7606                 # patches specified in the 'patches' feature.
7607                 # For single commits, we limit the output to a single patch,
7608                 # diverging from the git-format-patch default.
7609                 my @commit_spec = ();
7610                 if ($hash_parent) {
7611                         if ($patch_max > 0) {
7612                                 push @commit_spec, "-$patch_max";
7613                         }
7614                         push @commit_spec, '-n', "$hash_parent..$hash";
7615                 } else {
7616                         if ($params{-single}) {
7617                                 push @commit_spec, '-1';
7618                         } else {
7619                                 if ($patch_max > 0) {
7620                                         push @commit_spec, "-$patch_max";
7621                                 }
7622                                 push @commit_spec, "-n";
7623                         }
7624                         push @commit_spec, '--root', $hash;
7625                 }
7626                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7627                         '--encoding=utf8', '--stdout', @commit_spec
7628                         or die_error(500, "Open git-format-patch failed");
7629         } else {
7630                 die_error(400, "Unknown commitdiff format");
7631         }
7632
7633         # non-textual hash id's can be cached
7634         my $expires;
7635         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7636                 $expires = "+1d";
7637         }
7638
7639         # write commit message
7640         if ($format eq 'html') {
7641                 my $refs = git_get_references();
7642                 my $ref = format_ref_marker($refs, $co{'id'});
7643
7644                 git_header_html(undef, $expires);
7645                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7646                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7647                 print "<div class=\"title_text\">\n" .
7648                       "<table class=\"object_header\">\n";
7649                 git_print_authorship_rows(\%co);
7650                 print "</table>".
7651                       "</div>\n";
7652                 print "<div class=\"page_body\">\n";
7653                 if (@{$co{'comment'}} > 1) {
7654                         print "<div class=\"log\">\n";
7655                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7656                         print "</div>\n"; # class="log"
7657                 }
7658
7659         } elsif ($format eq 'plain') {
7660                 my $refs = git_get_references("tags");
7661                 my $tagname = git_get_rev_name_tags($hash);
7662                 my $filename = basename($project) . "-$hash.patch";
7663
7664                 print $cgi->header(
7665                         -type => 'text/plain',
7666                         -charset => 'utf-8',
7667                         -expires => $expires,
7668                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7669                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7670                 print "From: " . to_utf8($co{'author'}) . "\n";
7671                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7672                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7673
7674                 print "X-Git-Tag: $tagname\n" if $tagname;
7675                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7676
7677                 foreach my $line (@{$co{'comment'}}) {
7678                         print to_utf8($line) . "\n";
7679                 }
7680                 print "---\n\n";
7681         } elsif ($format eq 'patch') {
7682                 my $filename = basename($project) . "-$hash.patch";
7683
7684                 print $cgi->header(
7685                         -type => 'text/plain',
7686                         -charset => 'utf-8',
7687                         -expires => $expires,
7688                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7689         }
7690
7691         # write patch
7692         if ($format eq 'html') {
7693                 my $use_parents = !defined $hash_parent ||
7694                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7695                 git_difftree_body(\@difftree, $hash,
7696                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7697                 print "<br/>\n";
7698
7699                 git_patchset_body($fd, $diff_style,
7700                                   \@difftree, $hash,
7701                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7702                 close $fd;
7703                 print "</div>\n"; # class="page_body"
7704                 git_footer_html();
7705
7706         } elsif ($format eq 'plain') {
7707                 local $/ = undef;
7708                 print <$fd>;
7709                 close $fd
7710                         or print "Reading git-diff-tree failed\n";
7711         } elsif ($format eq 'patch') {
7712                 local $/ = undef;
7713                 print <$fd>;
7714                 close $fd
7715                         or print "Reading git-format-patch failed\n";
7716         }
7717 }
7718
7719 sub git_commitdiff_plain {
7720         git_commitdiff(-format => 'plain');
7721 }
7722
7723 # format-patch-style patches
7724 sub git_patch {
7725         git_commitdiff(-format => 'patch', -single => 1);
7726 }
7727
7728 sub git_patches {
7729         git_commitdiff(-format => 'patch');
7730 }
7731
7732 sub git_history {
7733         git_log_generic('history', \&git_history_body,
7734                         $hash_base, $hash_parent_base,
7735                         $file_name, $hash);
7736 }
7737
7738 sub git_search {
7739         $searchtype ||= 'commit';
7740
7741         # check if appropriate features are enabled
7742         gitweb_check_feature('search')
7743                 or die_error(403, "Search is disabled");
7744         if ($searchtype eq 'pickaxe') {
7745                 # pickaxe may take all resources of your box and run for several minutes
7746                 # with every query - so decide by yourself how public you make this feature
7747                 gitweb_check_feature('pickaxe')
7748                         or die_error(403, "Pickaxe search is disabled");
7749         }
7750         if ($searchtype eq 'grep') {
7751                 # grep search might be potentially CPU-intensive, too
7752                 gitweb_check_feature('grep')
7753                         or die_error(403, "Grep search is disabled");
7754         }
7755
7756         if (!defined $searchtext) {
7757                 die_error(400, "Text field is empty");
7758         }
7759         if (!defined $hash) {
7760                 $hash = git_get_head_hash($project);
7761         }
7762         my %co = parse_commit($hash);
7763         if (!%co) {
7764                 die_error(404, "Unknown commit object");
7765         }
7766         if (!defined $page) {
7767                 $page = 0;
7768         }
7769
7770         if ($searchtype eq 'commit' ||
7771             $searchtype eq 'author' ||
7772             $searchtype eq 'committer') {
7773                 git_search_message(%co);
7774         } elsif ($searchtype eq 'pickaxe') {
7775                 git_search_changes(%co);
7776         } elsif ($searchtype eq 'grep') {
7777                 git_search_files(%co);
7778         } else {
7779                 die_error(400, "Unknown search type");
7780         }
7781 }
7782
7783 sub git_search_help {
7784         git_header_html();
7785         git_print_page_nav('','', $hash,$hash,$hash);
7786         print <<EOT;
7787 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7788 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7789 the pattern entered is recognized as the POSIX extended
7790 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7791 insensitive).</p>
7792 <dl>
7793 <dt><b>commit</b></dt>
7794 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7795 EOT
7796         my $have_grep = gitweb_check_feature('grep');
7797         if ($have_grep) {
7798                 print <<EOT;
7799 <dt><b>grep</b></dt>
7800 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7801     a different one) are searched for the given pattern. On large trees, this search can take
7802 a while and put some strain on the server, so please use it with some consideration. Note that
7803 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7804 case-sensitive.</dd>
7805 EOT
7806         }
7807         print <<EOT;
7808 <dt><b>author</b></dt>
7809 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7810 <dt><b>committer</b></dt>
7811 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7812 EOT
7813         my $have_pickaxe = gitweb_check_feature('pickaxe');
7814         if ($have_pickaxe) {
7815                 print <<EOT;
7816 <dt><b>pickaxe</b></dt>
7817 <dd>All commits that caused the string to appear or disappear from any file (changes that
7818 added, removed or "modified" the string) will be listed. This search can take a while and
7819 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7820 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7821 EOT
7822         }
7823         print "</dl>\n";
7824         git_footer_html();
7825 }
7826
7827 sub git_shortlog {
7828         git_log_generic('shortlog', \&git_shortlog_body,
7829                         $hash, $hash_parent);
7830 }
7831
7832 ## ......................................................................
7833 ## feeds (RSS, Atom; OPML)
7834
7835 sub git_feed {
7836         my $format = shift || 'atom';
7837         my $have_blame = gitweb_check_feature('blame');
7838
7839         # Atom: http://www.atomenabled.org/developers/syndication/
7840         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7841         if ($format ne 'rss' && $format ne 'atom') {
7842                 die_error(400, "Unknown web feed format");
7843         }
7844
7845         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7846         my $head = $hash || 'HEAD';
7847         my @commitlist = parse_commits($head, 150, 0, $file_name);
7848
7849         my %latest_commit;
7850         my %latest_date;
7851         my $content_type = "application/$format+xml";
7852         if (defined $cgi->http('HTTP_ACCEPT') &&
7853                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7854                 # browser (feed reader) prefers text/xml
7855                 $content_type = 'text/xml';
7856         }
7857         if (defined($commitlist[0])) {
7858                 %latest_commit = %{$commitlist[0]};
7859                 my $latest_epoch = $latest_commit{'committer_epoch'};
7860                 exit_if_unmodified_since($latest_epoch);
7861                 %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7862         }
7863         print $cgi->header(
7864                 -type => $content_type,
7865                 -charset => 'utf-8',
7866                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
7867                 -status => '200 OK');
7868
7869         # Optimization: skip generating the body if client asks only
7870         # for Last-Modified date.
7871         return if ($cgi->request_method() eq 'HEAD');
7872
7873         # header variables
7874         my $title = "$site_name - $project/$action";
7875         my $feed_type = 'log';
7876         if (defined $hash) {
7877                 $title .= " - '$hash'";
7878                 $feed_type = 'branch log';
7879                 if (defined $file_name) {
7880                         $title .= " :: $file_name";
7881                         $feed_type = 'history';
7882                 }
7883         } elsif (defined $file_name) {
7884                 $title .= " - $file_name";
7885                 $feed_type = 'history';
7886         }
7887         $title .= " $feed_type";
7888         my $descr = git_get_project_description($project);
7889         if (defined $descr) {
7890                 $descr = esc_html($descr);
7891         } else {
7892                 $descr = "$project " .
7893                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7894                          " feed";
7895         }
7896         my $owner = git_get_project_owner($project);
7897         $owner = esc_html($owner);
7898
7899         #header
7900         my $alt_url;
7901         if (defined $file_name) {
7902                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7903         } elsif (defined $hash) {
7904                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7905         } else {
7906                 $alt_url = href(-full=>1, action=>"summary");
7907         }
7908         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7909         if ($format eq 'rss') {
7910                 print <<XML;
7911 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7912 <channel>
7913 XML
7914                 print "<title>$title</title>\n" .
7915                       "<link>$alt_url</link>\n" .
7916                       "<description>$descr</description>\n" .
7917                       "<language>en</language>\n" .
7918                       # project owner is responsible for 'editorial' content
7919                       "<managingEditor>$owner</managingEditor>\n";
7920                 if (defined $logo || defined $favicon) {
7921                         # prefer the logo to the favicon, since RSS
7922                         # doesn't allow both
7923                         my $img = esc_url($logo || $favicon);
7924                         print "<image>\n" .
7925                               "<url>$img</url>\n" .
7926                               "<title>$title</title>\n" .
7927                               "<link>$alt_url</link>\n" .
7928                               "</image>\n";
7929                 }
7930                 if (%latest_date) {
7931                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7932                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7933                 }
7934                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7935         } elsif ($format eq 'atom') {
7936                 print <<XML;
7937 <feed xmlns="http://www.w3.org/2005/Atom">
7938 XML
7939                 print "<title>$title</title>\n" .
7940                       "<subtitle>$descr</subtitle>\n" .
7941                       '<link rel="alternate" type="text/html" href="' .
7942                       $alt_url . '" />' . "\n" .
7943                       '<link rel="self" type="' . $content_type . '" href="' .
7944                       $cgi->self_url() . '" />' . "\n" .
7945                       "<id>" . href(-full=>1) . "</id>\n" .
7946                       # use project owner for feed author
7947                       "<author><name>$owner</name></author>\n";
7948                 if (defined $favicon) {
7949                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7950                 }
7951                 if (defined $logo) {
7952                         # not twice as wide as tall: 72 x 27 pixels
7953                         print "<logo>" . esc_url($logo) . "</logo>\n";
7954                 }
7955                 if (! %latest_date) {
7956                         # dummy date to keep the feed valid until commits trickle in:
7957                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7958                 } else {
7959                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7960                 }
7961                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7962         }
7963
7964         # contents
7965         for (my $i = 0; $i <= $#commitlist; $i++) {
7966                 my %co = %{$commitlist[$i]};
7967                 my $commit = $co{'id'};
7968                 # we read 150, we always show 30 and the ones more recent than 48 hours
7969                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7970                         last;
7971                 }
7972                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7973
7974                 # get list of changed files
7975                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7976                         $co{'parent'} || "--root",
7977                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7978                         or next;
7979                 my @difftree = map { chomp; $_ } <$fd>;
7980                 close $fd
7981                         or next;
7982
7983                 # print element (entry, item)
7984                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7985                 if ($format eq 'rss') {
7986                         print "<item>\n" .
7987                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7988                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7989                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7990                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7991                               "<link>$co_url</link>\n" .
7992                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7993                               "<content:encoded>" .
7994                               "<![CDATA[\n";
7995                 } elsif ($format eq 'atom') {
7996                         print "<entry>\n" .
7997                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7998                               "<updated>$cd{'iso-8601'}</updated>\n" .
7999                               "<author>\n" .
8000                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8001                         if ($co{'author_email'}) {
8002                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8003                         }
8004                         print "</author>\n" .
8005                               # use committer for contributor
8006                               "<contributor>\n" .
8007                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8008                         if ($co{'committer_email'}) {
8009                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8010                         }
8011                         print "</contributor>\n" .
8012                               "<published>$cd{'iso-8601'}</published>\n" .
8013                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8014                               "<id>$co_url</id>\n" .
8015                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8016                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8017                 }
8018                 my $comment = $co{'comment'};
8019                 print "<pre>\n";
8020                 foreach my $line (@$comment) {
8021                         $line = esc_html($line);
8022                         print "$line\n";
8023                 }
8024                 print "</pre><ul>\n";
8025                 foreach my $difftree_line (@difftree) {
8026                         my %difftree = parse_difftree_raw_line($difftree_line);
8027                         next if !$difftree{'from_id'};
8028
8029                         my $file = $difftree{'file'} || $difftree{'to_file'};
8030
8031                         print "<li>" .
8032                               "[" .
8033                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8034                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8035                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8036                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8037                                       -title => "diff"}, 'D');
8038                         if ($have_blame) {
8039                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8040                                                              file_name=>$file, hash_base=>$commit),
8041                                               -title => "blame"}, 'B');
8042                         }
8043                         # if this is not a feed of a file history
8044                         if (!defined $file_name || $file_name ne $file) {
8045                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8046                                                              file_name=>$file, hash=>$commit),
8047                                               -title => "history"}, 'H');
8048                         }
8049                         $file = esc_path($file);
8050                         print "] ".
8051                               "$file</li>\n";
8052                 }
8053                 if ($format eq 'rss') {
8054                         print "</ul>]]>\n" .
8055                               "</content:encoded>\n" .
8056                               "</item>\n";
8057                 } elsif ($format eq 'atom') {
8058                         print "</ul>\n</div>\n" .
8059                               "</content>\n" .
8060                               "</entry>\n";
8061                 }
8062         }
8063
8064         # end of feed
8065         if ($format eq 'rss') {
8066                 print "</channel>\n</rss>\n";
8067         } elsif ($format eq 'atom') {
8068                 print "</feed>\n";
8069         }
8070 }
8071
8072 sub git_rss {
8073         git_feed('rss');
8074 }
8075
8076 sub git_atom {
8077         git_feed('atom');
8078 }
8079
8080 sub git_opml {
8081         my @list = git_get_projects_list($project_filter, $strict_export);
8082         if (!@list) {
8083                 die_error(404, "No projects found");
8084         }
8085
8086         print $cgi->header(
8087                 -type => 'text/xml',
8088                 -charset => 'utf-8',
8089                 -content_disposition => 'inline; filename="opml.xml"');
8090
8091         my $title = esc_html($site_name);
8092         my $filter = " within subdirectory ";
8093         if (defined $project_filter) {
8094                 $filter .= esc_html($project_filter);
8095         } else {
8096                 $filter = "";
8097         }
8098         print <<XML;
8099 <?xml version="1.0" encoding="utf-8"?>
8100 <opml version="1.0">
8101 <head>
8102   <title>$title OPML Export$filter</title>
8103 </head>
8104 <body>
8105 <outline text="git RSS feeds">
8106 XML
8107
8108         foreach my $pr (@list) {
8109                 my %proj = %$pr;
8110                 my $head = git_get_head_hash($proj{'path'});
8111                 if (!defined $head) {
8112                         next;
8113                 }
8114                 $git_dir = "$projectroot/$proj{'path'}";
8115                 my %co = parse_commit($head);
8116                 if (!%co) {
8117                         next;
8118                 }
8119
8120                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8121                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8122                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8123                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8124         }
8125         print <<XML;
8126 </outline>
8127 </body>
8128 </opml>
8129 XML
8130 }