gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 # $path_info has already been URL-decoded by the web server, but
  58                 # $my_url and $my_uri have not. URL-decode them so we can properly
  59                 # strip $path_info.
  60                 $my_url = unescape($my_url);
  61                 $my_uri = unescape($my_uri);
  62                 if ($my_url =~ s,\Q$path_info\E$,, &&
  63                     $my_uri =~ s,\Q$path_info\E$,, &&
  64                     defined $ENV{'SCRIPT_NAME'}) {
  65                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                 }
  67         }
  68
  69         # target of the home link on top of all pages
  70         our $home_link = $my_uri || "/";
  71 }
  72
  73 # core git executable to use
  74 # this can just be "git" if your webserver has a sensible PATH
  75 our $GIT = "++GIT_BINDIR++/git";
  76
  77 # absolute fs-path which will be prepended to the project path
  78 #our $projectroot = "/pub/scm";
  79 our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81 # fs traversing limit for getting project list
  82 # the number is relative to the projectroot
  83 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85 # string of the home link on top of all pages
  86 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  87
  88 # name of your site or organization to appear in page titles
  89 # replace this with something more descriptive for clearer bookmarks
  90 our $site_name = "++GITWEB_SITENAME++"
  91                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  92
  93 # html snippet to include in the <head> section of each page
  94 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  95 # filename of html text to include at top of each page
  96 our $site_header = "++GITWEB_SITE_HEADER++";
  97 # html text to include at home page
  98 our $home_text = "++GITWEB_HOMETEXT++";
  99 # filename of html text to include at bottom of each page
 100 our $site_footer = "++GITWEB_SITE_FOOTER++";
 101
 102 # URI of stylesheets
 103 our @stylesheets = ("++GITWEB_CSS++");
 104 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 105 our $stylesheet = undef;
 106 # URI of GIT logo (72x27 size)
 107 our $logo = "++GITWEB_LOGO++";
 108 # URI of GIT favicon, assumed to be image/png type
 109 our $favicon = "++GITWEB_FAVICON++";
 110 # URI of gitweb.js (JavaScript code for gitweb)
 111 our $javascript = "++GITWEB_JS++";
 112
 113 # URI and label (title) of GIT logo link
 114 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 115 #our $logo_label = "git documentation";
 116 our $logo_url = "http://git-scm.com/";
 117 our $logo_label = "git homepage";
 118
 119 # source of projects list
 120 our $projects_list = "++GITWEB_LIST++";
 121
 122 # the width (in characters) of the projects list "Description" column
 123 our $projects_list_description_width = 25;
 124
 125 # group projects by category on the projects list
 126 # (enabled if this variable evaluates to true)
 127 our $projects_list_group_categories = 0;
 128
 129 # default category if none specified
 130 # (leave the empty string for no category)
 131 our $project_list_default_category = "";
 132
 133 # default order of projects list
 134 # valid values are none, project, descr, owner, and age
 135 our $default_projects_order = "project";
 136
 137 # show repository only if this file exists
 138 # (only effective if this variable evaluates to true)
 139 our $export_ok = "++GITWEB_EXPORT_OK++";
 140
 141 # don't generate age column on the projects list page
 142 our $omit_age_column = 0;
 143
 144 # don't generate information about owners of repositories
 145 our $omit_owner=0;
 146
 147 # show repository only if this subroutine returns true
 148 # when given the path to the project, for example:
 149 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 150 our $export_auth_hook = undef;
 151
 152 # only allow viewing of repositories also shown on the overview page
 153 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 154
 155 # list of git base URLs used for URL to where fetch project from,
 156 # i.e. full URL is "$git_base_url/$project"
 157 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 158
 159 # default blob_plain mimetype and default charset for text/plain blob
 160 our $default_blob_plain_mimetype = 'text/plain';
 161 our $default_text_plain_charset  = undef;
 162
 163 # file to use for guessing MIME types before trying /etc/mime.types
 164 # (relative to the current git repository)
 165 our $mimetypes_file = undef;
 166
 167 # assume this charset if line contains non-UTF-8 characters;
 168 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 169 # for which encoding all byte sequences are valid, for example
 170 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 171 # could be even 'utf-8' for the old behavior)
 172 our $fallback_encoding = 'latin1';
 173
 174 # rename detection options for git-diff and git-diff-tree
 175 # - default is '-M', with the cost proportional to
 176 #   (number of removed files) * (number of new files).
 177 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 178 #   (number of changed files + number of removed files) * (number of new files)
 179 # - even more costly is '-C', '--find-copies-harder' with cost
 180 #   (number of files in the original tree) * (number of new files)
 181 # - one might want to include '-B' option, e.g. '-B', '-M'
 182 our @diff_opts = ('-M'); # taken from git_commit
 183
 184 # Disables features that would allow repository owners to inject script into
 185 # the gitweb domain.
 186 our $prevent_xss = 0;
 187
 188 # Path to the highlight executable to use (must be the one from
 189 # http://www.andre-simon.de due to assumptions about parameters and output).
 190 # Useful if highlight is not installed on your webserver's PATH.
 191 # [Default: highlight]
 192 our $highlight_bin = "++HIGHLIGHT_BIN++";
 193
 194 # information about snapshot formats that gitweb is capable of serving
 195 our %known_snapshot_formats = (
 196         # name => {
 197         #       'display' => display name,
 198         #       'type' => mime type,
 199         #       'suffix' => filename suffix,
 200         #       'format' => --format for git-archive,
 201         #       'compressor' => [compressor command and arguments]
 202         #                       (array reference, optional)
 203         #       'disabled' => boolean (optional)}
 204         #
 205         'tgz' => {
 206                 'display' => 'tar.gz',
 207                 'type' => 'application/x-gzip',
 208                 'suffix' => '.tar.gz',
 209                 'format' => 'tar',
 210                 'compressor' => ['gzip', '-n']},
 211
 212         'tbz2' => {
 213                 'display' => 'tar.bz2',
 214                 'type' => 'application/x-bzip2',
 215                 'suffix' => '.tar.bz2',
 216                 'format' => 'tar',
 217                 'compressor' => ['bzip2']},
 218
 219         'txz' => {
 220                 'display' => 'tar.xz',
 221                 'type' => 'application/x-xz',
 222                 'suffix' => '.tar.xz',
 223                 'format' => 'tar',
 224                 'compressor' => ['xz'],
 225                 'disabled' => 1},
 226
 227         'zip' => {
 228                 'display' => 'zip',
 229                 'type' => 'application/x-zip',
 230                 'suffix' => '.zip',
 231                 'format' => 'zip'},
 232 );
 233
 234 # Aliases so we understand old gitweb.snapshot values in repository
 235 # configuration.
 236 our %known_snapshot_format_aliases = (
 237         'gzip'  => 'tgz',
 238         'bzip2' => 'tbz2',
 239         'xz'    => 'txz',
 240
 241         # backward compatibility: legacy gitweb config support
 242         'x-gzip' => undef, 'gz' => undef,
 243         'x-bzip2' => undef, 'bz2' => undef,
 244         'x-zip' => undef, '' => undef,
 245 );
 246
 247 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 248 # are changed, it may be appropriate to change these values too via
 249 # $GITWEB_CONFIG.
 250 our %avatar_size = (
 251         'default' => 16,
 252         'double'  => 32
 253 );
 254
 255 # Used to set the maximum load that we will still respond to gitweb queries.
 256 # If server load exceed this value then return "503 server busy" error.
 257 # If gitweb cannot determined server load, it is taken to be 0.
 258 # Leave it undefined (or set to 'undef') to turn off load checking.
 259 our $maxload = 300;
 260
 261 # configuration for 'highlight' (http://www.andre-simon.de/)
 262 # match by basename
 263 our %highlight_basename = (
 264         #'Program' => 'py',
 265         #'Library' => 'py',
 266         'SConstruct' => 'py', # SCons equivalent of Makefile
 267         'Makefile' => 'make',
 268 );
 269 # match by extension
 270 our %highlight_ext = (
 271         # main extensions, defining name of syntax;
 272         # see files in /usr/share/highlight/langDefs/ directory
 273         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 274         # alternate extensions, see /etc/highlight/filetypes.conf
 275         (map { $_ => 'c'   } qw(c h)),
 276         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 277         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 278         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 279         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 280         (map { $_ => 'make'} qw(make mak mk)),
 281         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 282 );
 283
 284 # You define site-wide feature defaults here; override them with
 285 # $GITWEB_CONFIG as necessary.
 286 our %feature = (
 287         # feature => {
 288         #       'sub' => feature-sub (subroutine),
 289         #       'override' => allow-override (boolean),
 290         #       'default' => [ default options...] (array reference)}
 291         #
 292         # if feature is overridable (it means that allow-override has true value),
 293         # then feature-sub will be called with default options as parameters;
 294         # return value of feature-sub indicates if to enable specified feature
 295         #
 296         # if there is no 'sub' key (no feature-sub), then feature cannot be
 297         # overridden
 298         #
 299         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 300         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 301         # is enabled
 302
 303         # Enable the 'blame' blob view, showing the last commit that modified
 304         # each line in the file. This can be very CPU-intensive.
 305
 306         # To enable system wide have in $GITWEB_CONFIG
 307         # $feature{'blame'}{'default'} = [1];
 308         # To have project specific config enable override in $GITWEB_CONFIG
 309         # $feature{'blame'}{'override'} = 1;
 310         # and in project config gitweb.blame = 0|1;
 311         'blame' => {
 312                 'sub' => sub { feature_bool('blame', @_) },
 313                 'override' => 0,
 314                 'default' => [0]},
 315
 316         # Enable the 'snapshot' link, providing a compressed archive of any
 317         # tree. This can potentially generate high traffic if you have large
 318         # project.
 319
 320         # Value is a list of formats defined in %known_snapshot_formats that
 321         # you wish to offer.
 322         # To disable system wide have in $GITWEB_CONFIG
 323         # $feature{'snapshot'}{'default'} = [];
 324         # To have project specific config enable override in $GITWEB_CONFIG
 325         # $feature{'snapshot'}{'override'} = 1;
 326         # and in project config, a comma-separated list of formats or "none"
 327         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 328         'snapshot' => {
 329                 'sub' => \&feature_snapshot,
 330                 'override' => 0,
 331                 'default' => ['tgz']},
 332
 333         # Enable text search, which will list the commits which match author,
 334         # committer or commit text to a given string.  Enabled by default.
 335         # Project specific override is not supported.
 336         #
 337         # Note that this controls all search features, which means that if
 338         # it is disabled, then 'grep' and 'pickaxe' search would also be
 339         # disabled.
 340         'search' => {
 341                 'override' => 0,
 342                 'default' => [1]},
 343
 344         # Enable grep search, which will list the files in currently selected
 345         # tree containing the given string. Enabled by default. This can be
 346         # potentially CPU-intensive, of course.
 347         # Note that you need to have 'search' feature enabled too.
 348
 349         # To enable system wide have in $GITWEB_CONFIG
 350         # $feature{'grep'}{'default'} = [1];
 351         # To have project specific config enable override in $GITWEB_CONFIG
 352         # $feature{'grep'}{'override'} = 1;
 353         # and in project config gitweb.grep = 0|1;
 354         'grep' => {
 355                 'sub' => sub { feature_bool('grep', @_) },
 356                 'override' => 0,
 357                 'default' => [1]},
 358
 359         # Enable the pickaxe search, which will list the commits that modified
 360         # a given string in a file. This can be practical and quite faster
 361         # alternative to 'blame', but still potentially CPU-intensive.
 362         # Note that you need to have 'search' feature enabled too.
 363
 364         # To enable system wide have in $GITWEB_CONFIG
 365         # $feature{'pickaxe'}{'default'} = [1];
 366         # To have project specific config enable override in $GITWEB_CONFIG
 367         # $feature{'pickaxe'}{'override'} = 1;
 368         # and in project config gitweb.pickaxe = 0|1;
 369         'pickaxe' => {
 370                 'sub' => sub { feature_bool('pickaxe', @_) },
 371                 'override' => 0,
 372                 'default' => [1]},
 373
 374         # Enable showing size of blobs in a 'tree' view, in a separate
 375         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 376
 377         # To disable system wide have in $GITWEB_CONFIG
 378         # $feature{'show-sizes'}{'default'} = [0];
 379         # To have project specific config enable override in $GITWEB_CONFIG
 380         # $feature{'show-sizes'}{'override'} = 1;
 381         # and in project config gitweb.showsizes = 0|1;
 382         'show-sizes' => {
 383                 'sub' => sub { feature_bool('showsizes', @_) },
 384                 'override' => 0,
 385                 'default' => [1]},
 386
 387         # Make gitweb use an alternative format of the URLs which can be
 388         # more readable and natural-looking: project name is embedded
 389         # directly in the path and the query string contains other
 390         # auxiliary information. All gitweb installations recognize
 391         # URL in either format; this configures in which formats gitweb
 392         # generates links.
 393
 394         # To enable system wide have in $GITWEB_CONFIG
 395         # $feature{'pathinfo'}{'default'} = [1];
 396         # Project specific override is not supported.
 397
 398         # Note that you will need to change the default location of CSS,
 399         # favicon, logo and possibly other files to an absolute URL. Also,
 400         # if gitweb.cgi serves as your indexfile, you will need to force
 401         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 402         'pathinfo' => {
 403                 'override' => 0,
 404                 'default' => [0]},
 405
 406         # Make gitweb consider projects in project root subdirectories
 407         # to be forks of existing projects. Given project $projname.git,
 408         # projects matching $projname/*.git will not be shown in the main
 409         # projects list, instead a '+' mark will be added to $projname
 410         # there and a 'forks' view will be enabled for the project, listing
 411         # all the forks. If project list is taken from a file, forks have
 412         # to be listed after the main project.
 413
 414         # To enable system wide have in $GITWEB_CONFIG
 415         # $feature{'forks'}{'default'} = [1];
 416         # Project specific override is not supported.
 417         'forks' => {
 418                 'override' => 0,
 419                 'default' => [0]},
 420
 421         # Insert custom links to the action bar of all project pages.
 422         # This enables you mainly to link to third-party scripts integrating
 423         # into gitweb; e.g. git-browser for graphical history representation
 424         # or custom web-based repository administration interface.
 425
 426         # The 'default' value consists of a list of triplets in the form
 427         # (label, link, position) where position is the label after which
 428         # to insert the link and link is a format string where %n expands
 429         # to the project name, %f to the project path within the filesystem,
 430         # %h to the current hash (h gitweb parameter) and %b to the current
 431         # hash base (hb gitweb parameter); %% expands to %.
 432
 433         # To enable system wide have in $GITWEB_CONFIG e.g.
 434         # $feature{'actions'}{'default'} = [('graphiclog',
 435         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 436         # Project specific override is not supported.
 437         'actions' => {
 438                 'override' => 0,
 439                 'default' => []},
 440
 441         # Allow gitweb scan project content tags of project repository,
 442         # and display the popular Web 2.0-ish "tag cloud" near the projects
 443         # list.  Note that this is something COMPLETELY different from the
 444         # normal Git tags.
 445
 446         # gitweb by itself can show existing tags, but it does not handle
 447         # tagging itself; you need to do it externally, outside gitweb.
 448         # The format is described in git_get_project_ctags() subroutine.
 449         # You may want to install the HTML::TagCloud Perl module to get
 450         # a pretty tag cloud instead of just a list of tags.
 451
 452         # To enable system wide have in $GITWEB_CONFIG
 453         # $feature{'ctags'}{'default'} = [1];
 454         # Project specific override is not supported.
 455
 456         # In the future whether ctags editing is enabled might depend
 457         # on the value, but using 1 should always mean no editing of ctags.
 458         'ctags' => {
 459                 'override' => 0,
 460                 'default' => [0]},
 461
 462         # The maximum number of patches in a patchset generated in patch
 463         # view. Set this to 0 or undef to disable patch view, or to a
 464         # negative number to remove any limit.
 465
 466         # To disable system wide have in $GITWEB_CONFIG
 467         # $feature{'patches'}{'default'} = [0];
 468         # To have project specific config enable override in $GITWEB_CONFIG
 469         # $feature{'patches'}{'override'} = 1;
 470         # and in project config gitweb.patches = 0|n;
 471         # where n is the maximum number of patches allowed in a patchset.
 472         'patches' => {
 473                 'sub' => \&feature_patches,
 474                 'override' => 0,
 475                 'default' => [16]},
 476
 477         # Avatar support. When this feature is enabled, views such as
 478         # shortlog or commit will display an avatar associated with
 479         # the email of the committer(s) and/or author(s).
 480
 481         # Currently available providers are gravatar and picon.
 482         # If an unknown provider is specified, the feature is disabled.
 483
 484         # Gravatar depends on Digest::MD5.
 485         # Picon currently relies on the indiana.edu database.
 486
 487         # To enable system wide have in $GITWEB_CONFIG
 488         # $feature{'avatar'}{'default'} = ['<provider>'];
 489         # where <provider> is either gravatar or picon.
 490         # To have project specific config enable override in $GITWEB_CONFIG
 491         # $feature{'avatar'}{'override'} = 1;
 492         # and in project config gitweb.avatar = <provider>;
 493         'avatar' => {
 494                 'sub' => \&feature_avatar,
 495                 'override' => 0,
 496                 'default' => ['']},
 497
 498         # Enable displaying how much time and how many git commands
 499         # it took to generate and display page.  Disabled by default.
 500         # Project specific override is not supported.
 501         'timed' => {
 502                 'override' => 0,
 503                 'default' => [0]},
 504
 505         # Enable turning some links into links to actions which require
 506         # JavaScript to run (like 'blame_incremental').  Not enabled by
 507         # default.  Project specific override is currently not supported.
 508         'javascript-actions' => {
 509                 'override' => 0,
 510                 'default' => [0]},
 511
 512         # Enable and configure ability to change common timezone for dates
 513         # in gitweb output via JavaScript.  Enabled by default.
 514         # Project specific override is not supported.
 515         'javascript-timezone' => {
 516                 'override' => 0,
 517                 'default' => [
 518                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 519                                      # or undef to turn off this feature
 520                         'gitweb_tz', # name of cookie where to store selected timezone
 521                         'datetime',  # CSS class used to mark up dates for manipulation
 522                 ]},
 523
 524         # Syntax highlighting support. This is based on Daniel Svensson's
 525         # and Sham Chukoury's work in gitweb-xmms2.git.
 526         # It requires the 'highlight' program present in $PATH,
 527         # and therefore is disabled by default.
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'highlight'}{'default'} = [1];
 531
 532         'highlight' => {
 533                 'sub' => sub { feature_bool('highlight', @_) },
 534                 'override' => 0,
 535                 'default' => [0]},
 536
 537         # Enable displaying of remote heads in the heads list
 538
 539         # To enable system wide have in $GITWEB_CONFIG
 540         # $feature{'remote_heads'}{'default'} = [1];
 541         # To have project specific config enable override in $GITWEB_CONFIG
 542         # $feature{'remote_heads'}{'override'} = 1;
 543         # and in project config gitweb.remote_heads = 0|1;
 544         'remote_heads' => {
 545                 'sub' => sub { feature_bool('remote_heads', @_) },
 546                 'override' => 0,
 547                 'default' => [0]},
 548 );
 549
 550 sub gitweb_get_feature {
 551         my ($name) = @_;
 552         return unless exists $feature{$name};
 553         my ($sub, $override, @defaults) = (
 554                 $feature{$name}{'sub'},
 555                 $feature{$name}{'override'},
 556                 @{$feature{$name}{'default'}});
 557         # project specific override is possible only if we have project
 558         our $git_dir; # global variable, declared later
 559         if (!$override || !defined $git_dir) {
 560                 return @defaults;
 561         }
 562         if (!defined $sub) {
 563                 warn "feature $name is not overridable";
 564                 return @defaults;
 565         }
 566         return $sub->(@defaults);
 567 }
 568
 569 # A wrapper to check if a given feature is enabled.
 570 # With this, you can say
 571 #
 572 #   my $bool_feat = gitweb_check_feature('bool_feat');
 573 #   gitweb_check_feature('bool_feat') or somecode;
 574 #
 575 # instead of
 576 #
 577 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 578 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 579 #
 580 sub gitweb_check_feature {
 581         return (gitweb_get_feature(@_))[0];
 582 }
 583
 584
 585 sub feature_bool {
 586         my $key = shift;
 587         my ($val) = git_get_project_config($key, '--bool');
 588
 589         if (!defined $val) {
 590                 return ($_[0]);
 591         } elsif ($val eq 'true') {
 592                 return (1);
 593         } elsif ($val eq 'false') {
 594                 return (0);
 595         }
 596 }
 597
 598 sub feature_snapshot {
 599         my (@fmts) = @_;
 600
 601         my ($val) = git_get_project_config('snapshot');
 602
 603         if ($val) {
 604                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 605         }
 606
 607         return @fmts;
 608 }
 609
 610 sub feature_patches {
 611         my @val = (git_get_project_config('patches', '--int'));
 612
 613         if (@val) {
 614                 return @val;
 615         }
 616
 617         return ($_[0]);
 618 }
 619
 620 sub feature_avatar {
 621         my @val = (git_get_project_config('avatar'));
 622
 623         return @val ? @val : @_;
 624 }
 625
 626 # checking HEAD file with -e is fragile if the repository was
 627 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 628 # and then pruned.
 629 sub check_head_link {
 630         my ($dir) = @_;
 631         my $headfile = "$dir/HEAD";
 632         return ((-e $headfile) ||
 633                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 634 }
 635
 636 sub check_export_ok {
 637         my ($dir) = @_;
 638         return (check_head_link($dir) &&
 639                 (!$export_ok || -e "$dir/$export_ok") &&
 640                 (!$export_auth_hook || $export_auth_hook->($dir)));
 641 }
 642
 643 # process alternate names for backward compatibility
 644 # filter out unsupported (unknown) snapshot formats
 645 sub filter_snapshot_fmts {
 646         my @fmts = @_;
 647
 648         @fmts = map {
 649                 exists $known_snapshot_format_aliases{$_} ?
 650                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 651         @fmts = grep {
 652                 exists $known_snapshot_formats{$_} &&
 653                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 654 }
 655
 656 # If it is set to code reference, it is code that it is to be run once per
 657 # request, allowing updating configurations that change with each request,
 658 # while running other code in config file only once.
 659 #
 660 # Otherwise, if it is false then gitweb would process config file only once;
 661 # if it is true then gitweb config would be run for each request.
 662 our $per_request_config = 1;
 663
 664 # read and parse gitweb config file given by its parameter.
 665 # returns true on success, false on recoverable error, allowing
 666 # to chain this subroutine, using first file that exists.
 667 # dies on errors during parsing config file, as it is unrecoverable.
 668 sub read_config_file {
 669         my $filename = shift;
 670         return unless defined $filename;
 671         # die if there are errors parsing config file
 672         if (-e $filename) {
 673                 do $filename;
 674                 die $@ if $@;
 675                 return 1;
 676         }
 677         return;
 678 }
 679
 680 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 681 sub evaluate_gitweb_config {
 682         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 683         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 684         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 685
 686         # Protect agains duplications of file names, to not read config twice.
 687         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 688         # there possibility of duplication of filename there doesn't matter.
 689         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 690         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 691
 692         # Common system-wide settings for convenience.
 693         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 694         read_config_file($GITWEB_CONFIG_COMMON);
 695
 696         # Use first config file that exists.  This means use the per-instance
 697         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 698         read_config_file($GITWEB_CONFIG) and return;
 699         read_config_file($GITWEB_CONFIG_SYSTEM);
 700 }
 701
 702 # Get loadavg of system, to compare against $maxload.
 703 # Currently it requires '/proc/loadavg' present to get loadavg;
 704 # if it is not present it returns 0, which means no load checking.
 705 sub get_loadavg {
 706         if( -e '/proc/loadavg' ){
 707                 open my $fd, '<', '/proc/loadavg'
 708                         or return 0;
 709                 my @load = split(/\s+/, scalar <$fd>);
 710                 close $fd;
 711
 712                 # The first three columns measure CPU and IO utilization of the last one,
 713                 # five, and 10 minute periods.  The fourth column shows the number of
 714                 # currently running processes and the total number of processes in the m/n
 715                 # format.  The last column displays the last process ID used.
 716                 return $load[0] || 0;
 717         }
 718         # additional checks for load average should go here for things that don't export
 719         # /proc/loadavg
 720
 721         return 0;
 722 }
 723
 724 # version of the core git binary
 725 our $git_version;
 726 sub evaluate_git_version {
 727         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 728         $number_of_git_cmds++;
 729 }
 730
 731 sub check_loadavg {
 732         if (defined $maxload && get_loadavg() > $maxload) {
 733                 die_error(503, "The load average on the server is too high");
 734         }
 735 }
 736
 737 # ======================================================================
 738 # input validation and dispatch
 739
 740 # input parameters can be collected from a variety of sources (presently, CGI
 741 # and PATH_INFO), so we define an %input_params hash that collects them all
 742 # together during validation: this allows subsequent uses (e.g. href()) to be
 743 # agnostic of the parameter origin
 744
 745 our %input_params = ();
 746
 747 # input parameters are stored with the long parameter name as key. This will
 748 # also be used in the href subroutine to convert parameters to their CGI
 749 # equivalent, and since the href() usage is the most frequent one, we store
 750 # the name -> CGI key mapping here, instead of the reverse.
 751 #
 752 # XXX: Warning: If you touch this, check the search form for updating,
 753 # too.
 754
 755 our @cgi_param_mapping = (
 756         project => "p",
 757         action => "a",
 758         file_name => "f",
 759         file_parent => "fp",
 760         hash => "h",
 761         hash_parent => "hp",
 762         hash_base => "hb",
 763         hash_parent_base => "hpb",
 764         page => "pg",
 765         order => "o",
 766         searchtext => "s",
 767         searchtype => "st",
 768         snapshot_format => "sf",
 769         extra_options => "opt",
 770         search_use_regexp => "sr",
 771         ctag => "by_tag",
 772         diff_style => "ds",
 773         project_filter => "pf",
 774         # this must be last entry (for manipulation from JavaScript)
 775         javascript => "js"
 776 );
 777 our %cgi_param_mapping = @cgi_param_mapping;
 778
 779 # we will also need to know the possible actions, for validation
 780 our %actions = (
 781         "blame" => \&git_blame,
 782         "blame_incremental" => \&git_blame_incremental,
 783         "blame_data" => \&git_blame_data,
 784         "blobdiff" => \&git_blobdiff,
 785         "blobdiff_plain" => \&git_blobdiff_plain,
 786         "blob" => \&git_blob,
 787         "blob_plain" => \&git_blob_plain,
 788         "commitdiff" => \&git_commitdiff,
 789         "commitdiff_plain" => \&git_commitdiff_plain,
 790         "commit" => \&git_commit,
 791         "forks" => \&git_forks,
 792         "heads" => \&git_heads,
 793         "history" => \&git_history,
 794         "log" => \&git_log,
 795         "patch" => \&git_patch,
 796         "patches" => \&git_patches,
 797         "remotes" => \&git_remotes,
 798         "rss" => \&git_rss,
 799         "atom" => \&git_atom,
 800         "search" => \&git_search,
 801         "search_help" => \&git_search_help,
 802         "shortlog" => \&git_shortlog,
 803         "summary" => \&git_summary,
 804         "tag" => \&git_tag,
 805         "tags" => \&git_tags,
 806         "tree" => \&git_tree,
 807         "snapshot" => \&git_snapshot,
 808         "object" => \&git_object,
 809         # those below don't need $project
 810         "opml" => \&git_opml,
 811         "project_list" => \&git_project_list,
 812         "project_index" => \&git_project_index,
 813 );
 814
 815 # finally, we have the hash of allowed extra_options for the commands that
 816 # allow them
 817 our %allowed_options = (
 818         "--no-merges" => [ qw(rss atom log shortlog history) ],
 819 );
 820
 821 # fill %input_params with the CGI parameters. All values except for 'opt'
 822 # should be single values, but opt can be an array. We should probably
 823 # build an array of parameters that can be multi-valued, but since for the time
 824 # being it's only this one, we just single it out
 825 sub evaluate_query_params {
 826         our $cgi;
 827
 828         while (my ($name, $symbol) = each %cgi_param_mapping) {
 829                 if ($symbol eq 'opt') {
 830                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 831                 } else {
 832                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 833                 }
 834         }
 835 }
 836
 837 # now read PATH_INFO and update the parameter list for missing parameters
 838 sub evaluate_path_info {
 839         return if defined $input_params{'project'};
 840         return if !$path_info;
 841         $path_info =~ s,^/+,,;
 842         return if !$path_info;
 843
 844         # find which part of PATH_INFO is project
 845         my $project = $path_info;
 846         $project =~ s,/+$,,;
 847         while ($project && !check_head_link("$projectroot/$project")) {
 848                 $project =~ s,/*[^/]*$,,;
 849         }
 850         return unless $project;
 851         $input_params{'project'} = $project;
 852
 853         # do not change any parameters if an action is given using the query string
 854         return if $input_params{'action'};
 855         $path_info =~ s,^\Q$project\E/*,,;
 856
 857         # next, check if we have an action
 858         my $action = $path_info;
 859         $action =~ s,/.*$,,;
 860         if (exists $actions{$action}) {
 861                 $path_info =~ s,^$action/*,,;
 862                 $input_params{'action'} = $action;
 863         }
 864
 865         # list of actions that want hash_base instead of hash, but can have no
 866         # pathname (f) parameter
 867         my @wants_base = (
 868                 'tree',
 869                 'history',
 870         );
 871
 872         # we want to catch, among others
 873         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 874         my ($parentrefname, $parentpathname, $refname, $pathname) =
 875                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 876
 877         # first, analyze the 'current' part
 878         if (defined $pathname) {
 879                 # we got "branch:filename" or "branch:dir/"
 880                 # we could use git_get_type(branch:pathname), but:
 881                 # - it needs $git_dir
 882                 # - it does a git() call
 883                 # - the convention of terminating directories with a slash
 884                 #   makes it superfluous
 885                 # - embedding the action in the PATH_INFO would make it even
 886                 #   more superfluous
 887                 $pathname =~ s,^/+,,;
 888                 if (!$pathname || substr($pathname, -1) eq "/") {
 889                         $input_params{'action'} ||= "tree";
 890                         $pathname =~ s,/$,,;
 891                 } else {
 892                         # the default action depends on whether we had parent info
 893                         # or not
 894                         if ($parentrefname) {
 895                                 $input_params{'action'} ||= "blobdiff_plain";
 896                         } else {
 897                                 $input_params{'action'} ||= "blob_plain";
 898                         }
 899                 }
 900                 $input_params{'hash_base'} ||= $refname;
 901                 $input_params{'file_name'} ||= $pathname;
 902         } elsif (defined $refname) {
 903                 # we got "branch". In this case we have to choose if we have to
 904                 # set hash or hash_base.
 905                 #
 906                 # Most of the actions without a pathname only want hash to be
 907                 # set, except for the ones specified in @wants_base that want
 908                 # hash_base instead. It should also be noted that hand-crafted
 909                 # links having 'history' as an action and no pathname or hash
 910                 # set will fail, but that happens regardless of PATH_INFO.
 911                 if (defined $parentrefname) {
 912                         # if there is parent let the default be 'shortlog' action
 913                         # (for http://git.example.com/repo.git/A..B links); if there
 914                         # is no parent, dispatch will detect type of object and set
 915                         # action appropriately if required (if action is not set)
 916                         $input_params{'action'} ||= "shortlog";
 917                 }
 918                 if ($input_params{'action'} &&
 919                     grep { $_ eq $input_params{'action'} } @wants_base) {
 920                         $input_params{'hash_base'} ||= $refname;
 921                 } else {
 922                         $input_params{'hash'} ||= $refname;
 923                 }
 924         }
 925
 926         # next, handle the 'parent' part, if present
 927         if (defined $parentrefname) {
 928                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 929                 # someproject/blobdiff/oldrev..newrev:/filename
 930                 if ($parentpathname) {
 931                         $parentpathname =~ s,^/+,,;
 932                         $parentpathname =~ s,/$,,;
 933                         $input_params{'file_parent'} ||= $parentpathname;
 934                 } else {
 935                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 936                 }
 937                 # we assume that hash_parent_base is wanted if a path was specified,
 938                 # or if the action wants hash_base instead of hash
 939                 if (defined $input_params{'file_parent'} ||
 940                         grep { $_ eq $input_params{'action'} } @wants_base) {
 941                         $input_params{'hash_parent_base'} ||= $parentrefname;
 942                 } else {
 943                         $input_params{'hash_parent'} ||= $parentrefname;
 944                 }
 945         }
 946
 947         # for the snapshot action, we allow URLs in the form
 948         # $project/snapshot/$hash.ext
 949         # where .ext determines the snapshot and gets removed from the
 950         # passed $refname to provide the $hash.
 951         #
 952         # To be able to tell that $refname includes the format extension, we
 953         # require the following two conditions to be satisfied:
 954         # - the hash input parameter MUST have been set from the $refname part
 955         #   of the URL (i.e. they must be equal)
 956         # - the snapshot format MUST NOT have been defined already (e.g. from
 957         #   CGI parameter sf)
 958         # It's also useless to try any matching unless $refname has a dot,
 959         # so we check for that too
 960         if (defined $input_params{'action'} &&
 961                 $input_params{'action'} eq 'snapshot' &&
 962                 defined $refname && index($refname, '.') != -1 &&
 963                 $refname eq $input_params{'hash'} &&
 964                 !defined $input_params{'snapshot_format'}) {
 965                 # We loop over the known snapshot formats, checking for
 966                 # extensions. Allowed extensions are both the defined suffix
 967                 # (which includes the initial dot already) and the snapshot
 968                 # format key itself, with a prepended dot
 969                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 970                         my $hash = $refname;
 971                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 972                                 next;
 973                         }
 974                         my $sfx = $1;
 975                         # a valid suffix was found, so set the snapshot format
 976                         # and reset the hash parameter
 977                         $input_params{'snapshot_format'} = $fmt;
 978                         $input_params{'hash'} = $hash;
 979                         # we also set the format suffix to the one requested
 980                         # in the URL: this way a request for e.g. .tgz returns
 981                         # a .tgz instead of a .tar.gz
 982                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 983                         last;
 984                 }
 985         }
 986 }
 987
 988 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 989      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 990      $searchtext, $search_regexp, $project_filter);
 991 sub evaluate_and_validate_params {
 992         our $action = $input_params{'action'};
 993         if (defined $action) {
 994                 if (!validate_action($action)) {
 995                         die_error(400, "Invalid action parameter");
 996                 }
 997         }
 998
 999         # parameters which are pathnames
1000         our $project = $input_params{'project'};
1001         if (defined $project) {
1002                 if (!validate_project($project)) {
1003                         undef $project;
1004                         die_error(404, "No such project");
1005                 }
1006         }
1007
1008         our $project_filter = $input_params{'project_filter'};
1009         if (defined $project_filter) {
1010                 if (!validate_pathname($project_filter)) {
1011                         die_error(404, "Invalid project_filter parameter");
1012                 }
1013         }
1014
1015         our $file_name = $input_params{'file_name'};
1016         if (defined $file_name) {
1017                 if (!validate_pathname($file_name)) {
1018                         die_error(400, "Invalid file parameter");
1019                 }
1020         }
1021
1022         our $file_parent = $input_params{'file_parent'};
1023         if (defined $file_parent) {
1024                 if (!validate_pathname($file_parent)) {
1025                         die_error(400, "Invalid file parent parameter");
1026                 }
1027         }
1028
1029         # parameters which are refnames
1030         our $hash = $input_params{'hash'};
1031         if (defined $hash) {
1032                 if (!validate_refname($hash)) {
1033                         die_error(400, "Invalid hash parameter");
1034                 }
1035         }
1036
1037         our $hash_parent = $input_params{'hash_parent'};
1038         if (defined $hash_parent) {
1039                 if (!validate_refname($hash_parent)) {
1040                         die_error(400, "Invalid hash parent parameter");
1041                 }
1042         }
1043
1044         our $hash_base = $input_params{'hash_base'};
1045         if (defined $hash_base) {
1046                 if (!validate_refname($hash_base)) {
1047                         die_error(400, "Invalid hash base parameter");
1048                 }
1049         }
1050
1051         our @extra_options = @{$input_params{'extra_options'}};
1052         # @extra_options is always defined, since it can only be (currently) set from
1053         # CGI, and $cgi->param() returns the empty array in array context if the param
1054         # is not set
1055         foreach my $opt (@extra_options) {
1056                 if (not exists $allowed_options{$opt}) {
1057                         die_error(400, "Invalid option parameter");
1058                 }
1059                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1060                         die_error(400, "Invalid option parameter for this action");
1061                 }
1062         }
1063
1064         our $hash_parent_base = $input_params{'hash_parent_base'};
1065         if (defined $hash_parent_base) {
1066                 if (!validate_refname($hash_parent_base)) {
1067                         die_error(400, "Invalid hash parent base parameter");
1068                 }
1069         }
1070
1071         # other parameters
1072         our $page = $input_params{'page'};
1073         if (defined $page) {
1074                 if ($page =~ m/[^0-9]/) {
1075                         die_error(400, "Invalid page parameter");
1076                 }
1077         }
1078
1079         our $searchtype = $input_params{'searchtype'};
1080         if (defined $searchtype) {
1081                 if ($searchtype =~ m/[^a-z]/) {
1082                         die_error(400, "Invalid searchtype parameter");
1083                 }
1084         }
1085
1086         our $search_use_regexp = $input_params{'search_use_regexp'};
1087
1088         our $searchtext = $input_params{'searchtext'};
1089         our $search_regexp;
1090         if (defined $searchtext) {
1091                 if (length($searchtext) < 2) {
1092                         die_error(403, "At least two characters are required for search parameter");
1093                 }
1094                 if ($search_use_regexp) {
1095                         $search_regexp = $searchtext;
1096                         if (!eval { qr/$search_regexp/; 1; }) {
1097                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1098                                 die_error(400, "Invalid search regexp '$search_regexp'",
1099                                           esc_html($error));
1100                         }
1101                 } else {
1102                         $search_regexp = quotemeta $searchtext;
1103                 }
1104         }
1105 }
1106
1107 # path to the current git repository
1108 our $git_dir;
1109 sub evaluate_git_dir {
1110         our $git_dir = "$projectroot/$project" if $project;
1111 }
1112
1113 our (@snapshot_fmts, $git_avatar);
1114 sub configure_gitweb_features {
1115         # list of supported snapshot formats
1116         our @snapshot_fmts = gitweb_get_feature('snapshot');
1117         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1118
1119         # check that the avatar feature is set to a known provider name,
1120         # and for each provider check if the dependencies are satisfied.
1121         # if the provider name is invalid or the dependencies are not met,
1122         # reset $git_avatar to the empty string.
1123         our ($git_avatar) = gitweb_get_feature('avatar');
1124         if ($git_avatar eq 'gravatar') {
1125                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1126         } elsif ($git_avatar eq 'picon') {
1127                 # no dependencies
1128         } else {
1129                 $git_avatar = '';
1130         }
1131 }
1132
1133 # custom error handler: 'die <message>' is Internal Server Error
1134 sub handle_errors_html {
1135         my $msg = shift; # it is already HTML escaped
1136
1137         # to avoid infinite loop where error occurs in die_error,
1138         # change handler to default handler, disabling handle_errors_html
1139         set_message("Error occured when inside die_error:\n$msg");
1140
1141         # you cannot jump out of die_error when called as error handler;
1142         # the subroutine set via CGI::Carp::set_message is called _after_
1143         # HTTP headers are already written, so it cannot write them itself
1144         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1145 }
1146 set_message(\&handle_errors_html);
1147
1148 # dispatch
1149 sub dispatch {
1150         if (!defined $action) {
1151                 if (defined $hash) {
1152                         $action = git_get_type($hash);
1153                         $action or die_error(404, "Object does not exist");
1154                 } elsif (defined $hash_base && defined $file_name) {
1155                         $action = git_get_type("$hash_base:$file_name");
1156                         $action or die_error(404, "File or directory does not exist");
1157                 } elsif (defined $project) {
1158                         $action = 'summary';
1159                 } else {
1160                         $action = 'project_list';
1161                 }
1162         }
1163         if (!defined($actions{$action})) {
1164                 die_error(400, "Unknown action");
1165         }
1166         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1167             !$project) {
1168                 die_error(400, "Project needed");
1169         }
1170         $actions{$action}->();
1171 }
1172
1173 sub reset_timer {
1174         our $t0 = [ gettimeofday() ]
1175                 if defined $t0;
1176         our $number_of_git_cmds = 0;
1177 }
1178
1179 our $first_request = 1;
1180 sub run_request {
1181         reset_timer();
1182
1183         evaluate_uri();
1184         if ($first_request) {
1185                 evaluate_gitweb_config();
1186                 evaluate_git_version();
1187         }
1188         if ($per_request_config) {
1189                 if (ref($per_request_config) eq 'CODE') {
1190                         $per_request_config->();
1191                 } elsif (!$first_request) {
1192                         evaluate_gitweb_config();
1193                 }
1194         }
1195         check_loadavg();
1196
1197         # $projectroot and $projects_list might be set in gitweb config file
1198         $projects_list ||= $projectroot;
1199
1200         evaluate_query_params();
1201         evaluate_path_info();
1202         evaluate_and_validate_params();
1203         evaluate_git_dir();
1204
1205         configure_gitweb_features();
1206
1207         dispatch();
1208 }
1209
1210 our $is_last_request = sub { 1 };
1211 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1212 our $CGI = 'CGI';
1213 our $cgi;
1214 sub configure_as_fcgi {
1215         require CGI::Fast;
1216         our $CGI = 'CGI::Fast';
1217
1218         my $request_number = 0;
1219         # let each child service 100 requests
1220         our $is_last_request = sub { ++$request_number > 100 };
1221 }
1222 sub evaluate_argv {
1223         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1224         configure_as_fcgi()
1225                 if $script_name =~ /\.fcgi$/;
1226
1227         return unless (@ARGV);
1228
1229         require Getopt::Long;
1230         Getopt::Long::GetOptions(
1231                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1232                 'nproc|n=i' => sub {
1233                         my ($arg, $val) = @_;
1234                         return unless eval { require FCGI::ProcManager; 1; };
1235                         my $proc_manager = FCGI::ProcManager->new({
1236                                 n_processes => $val,
1237                         });
1238                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1239                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1240                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1241                 },
1242         );
1243 }
1244
1245 sub run {
1246         evaluate_argv();
1247
1248         $first_request = 1;
1249         $pre_listen_hook->()
1250                 if $pre_listen_hook;
1251
1252  REQUEST:
1253         while ($cgi = $CGI->new()) {
1254                 $pre_dispatch_hook->()
1255                         if $pre_dispatch_hook;
1256
1257                 run_request();
1258
1259                 $post_dispatch_hook->()
1260                         if $post_dispatch_hook;
1261                 $first_request = 0;
1262
1263                 last REQUEST if ($is_last_request->());
1264         }
1265
1266  DONE_GITWEB:
1267         1;
1268 }
1269
1270 run();
1271
1272 if (defined caller) {
1273         # wrapped in a subroutine processing requests,
1274         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1275         return;
1276 } else {
1277         # pure CGI script, serving single request
1278         exit;
1279 }
1280
1281 ## ======================================================================
1282 ## action links
1283
1284 # possible values of extra options
1285 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1286 # -replay => 1      - start from a current view (replay with modifications)
1287 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1288 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1289 sub href {
1290         my %params = @_;
1291         # default is to use -absolute url() i.e. $my_uri
1292         my $href = $params{-full} ? $my_url : $my_uri;
1293
1294         # implicit -replay, must be first of implicit params
1295         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1296
1297         $params{'project'} = $project unless exists $params{'project'};
1298
1299         if ($params{-replay}) {
1300                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1301                         if (!exists $params{$name}) {
1302                                 $params{$name} = $input_params{$name};
1303                         }
1304                 }
1305         }
1306
1307         my $use_pathinfo = gitweb_check_feature('pathinfo');
1308         if (defined $params{'project'} &&
1309             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1310                 # try to put as many parameters as possible in PATH_INFO:
1311                 #   - project name
1312                 #   - action
1313                 #   - hash_parent or hash_parent_base:/file_parent
1314                 #   - hash or hash_base:/filename
1315                 #   - the snapshot_format as an appropriate suffix
1316
1317                 # When the script is the root DirectoryIndex for the domain,
1318                 # $href here would be something like http://gitweb.example.com/
1319                 # Thus, we strip any trailing / from $href, to spare us double
1320                 # slashes in the final URL
1321                 $href =~ s,/$,,;
1322
1323                 # Then add the project name, if present
1324                 $href .= "/".esc_path_info($params{'project'});
1325                 delete $params{'project'};
1326
1327                 # since we destructively absorb parameters, we keep this
1328                 # boolean that remembers if we're handling a snapshot
1329                 my $is_snapshot = $params{'action'} eq 'snapshot';
1330
1331                 # Summary just uses the project path URL, any other action is
1332                 # added to the URL
1333                 if (defined $params{'action'}) {
1334                         $href .= "/".esc_path_info($params{'action'})
1335                                 unless $params{'action'} eq 'summary';
1336                         delete $params{'action'};
1337                 }
1338
1339                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1340                 # stripping nonexistent or useless pieces
1341                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1342                         || $params{'hash_parent'} || $params{'hash'});
1343                 if (defined $params{'hash_base'}) {
1344                         if (defined $params{'hash_parent_base'}) {
1345                                 $href .= esc_path_info($params{'hash_parent_base'});
1346                                 # skip the file_parent if it's the same as the file_name
1347                                 if (defined $params{'file_parent'}) {
1348                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1349                                                 delete $params{'file_parent'};
1350                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1351                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1352                                                 delete $params{'file_parent'};
1353                                         }
1354                                 }
1355                                 $href .= "..";
1356                                 delete $params{'hash_parent'};
1357                                 delete $params{'hash_parent_base'};
1358                         } elsif (defined $params{'hash_parent'}) {
1359                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1360                                 delete $params{'hash_parent'};
1361                         }
1362
1363                         $href .= esc_path_info($params{'hash_base'});
1364                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1365                                 $href .= ":/".esc_path_info($params{'file_name'});
1366                                 delete $params{'file_name'};
1367                         }
1368                         delete $params{'hash'};
1369                         delete $params{'hash_base'};
1370                 } elsif (defined $params{'hash'}) {
1371                         $href .= esc_path_info($params{'hash'});
1372                         delete $params{'hash'};
1373                 }
1374
1375                 # If the action was a snapshot, we can absorb the
1376                 # snapshot_format parameter too
1377                 if ($is_snapshot) {
1378                         my $fmt = $params{'snapshot_format'};
1379                         # snapshot_format should always be defined when href()
1380                         # is called, but just in case some code forgets, we
1381                         # fall back to the default
1382                         $fmt ||= $snapshot_fmts[0];
1383                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1384                         delete $params{'snapshot_format'};
1385                 }
1386         }
1387
1388         # now encode the parameters explicitly
1389         my @result = ();
1390         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1391                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1392                 if (defined $params{$name}) {
1393                         if (ref($params{$name}) eq "ARRAY") {
1394                                 foreach my $par (@{$params{$name}}) {
1395                                         push @result, $symbol . "=" . esc_param($par);
1396                                 }
1397                         } else {
1398                                 push @result, $symbol . "=" . esc_param($params{$name});
1399                         }
1400                 }
1401         }
1402         $href .= "?" . join(';', @result) if scalar @result;
1403
1404         # final transformation: trailing spaces must be escaped (URI-encoded)
1405         $href =~ s/(\s+)$/CGI::escape($1)/e;
1406
1407         if ($params{-anchor}) {
1408                 $href .= "#".esc_param($params{-anchor});
1409         }
1410
1411         return $href;
1412 }
1413
1414
1415 ## ======================================================================
1416 ## validation, quoting/unquoting and escaping
1417
1418 sub validate_action {
1419         my $input = shift || return undef;
1420         return undef unless exists $actions{$input};
1421         return $input;
1422 }
1423
1424 sub validate_project {
1425         my $input = shift || return undef;
1426         if (!validate_pathname($input) ||
1427                 !(-d "$projectroot/$input") ||
1428                 !check_export_ok("$projectroot/$input") ||
1429                 ($strict_export && !project_in_list($input))) {
1430                 return undef;
1431         } else {
1432                 return $input;
1433         }
1434 }
1435
1436 sub validate_pathname {
1437         my $input = shift || return undef;
1438
1439         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1440         # at the beginning, at the end, and between slashes.
1441         # also this catches doubled slashes
1442         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1443                 return undef;
1444         }
1445         # no null characters
1446         if ($input =~ m!\0!) {
1447                 return undef;
1448         }
1449         return $input;
1450 }
1451
1452 sub validate_refname {
1453         my $input = shift || return undef;
1454
1455         # textual hashes are O.K.
1456         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1457                 return $input;
1458         }
1459         # it must be correct pathname
1460         $input = validate_pathname($input)
1461                 or return undef;
1462         # restrictions on ref name according to git-check-ref-format
1463         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1464                 return undef;
1465         }
1466         return $input;
1467 }
1468
1469 # decode sequences of octets in utf8 into Perl's internal form,
1470 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1471 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1472 sub to_utf8 {
1473         my $str = shift;
1474         return undef unless defined $str;
1475
1476         if (utf8::is_utf8($str) || utf8::decode($str)) {
1477                 return $str;
1478         } else {
1479                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1480         }
1481 }
1482
1483 # quote unsafe chars, but keep the slash, even when it's not
1484 # correct, but quoted slashes look too horrible in bookmarks
1485 sub esc_param {
1486         my $str = shift;
1487         return undef unless defined $str;
1488         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1489         $str =~ s/ /\+/g;
1490         return $str;
1491 }
1492
1493 # the quoting rules for path_info fragment are slightly different
1494 sub esc_path_info {
1495         my $str = shift;
1496         return undef unless defined $str;
1497
1498         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1499         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1500
1501         return $str;
1502 }
1503
1504 # quote unsafe chars in whole URL, so some characters cannot be quoted
1505 sub esc_url {
1506         my $str = shift;
1507         return undef unless defined $str;
1508         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1509         $str =~ s/ /\+/g;
1510         return $str;
1511 }
1512
1513 # quote unsafe characters in HTML attributes
1514 sub esc_attr {
1515
1516         # for XHTML conformance escaping '"' to '&quot;' is not enough
1517         return esc_html(@_);
1518 }
1519
1520 # replace invalid utf8 character with SUBSTITUTION sequence
1521 sub esc_html {
1522         my $str = shift;
1523         my %opts = @_;
1524
1525         return undef unless defined $str;
1526
1527         $str = to_utf8($str);
1528         $str = $cgi->escapeHTML($str);
1529         if ($opts{'-nbsp'}) {
1530                 $str =~ s/ /&nbsp;/g;
1531         }
1532         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1533         return $str;
1534 }
1535
1536 # quote control characters and escape filename to HTML
1537 sub esc_path {
1538         my $str = shift;
1539         my %opts = @_;
1540
1541         return undef unless defined $str;
1542
1543         $str = to_utf8($str);
1544         $str = $cgi->escapeHTML($str);
1545         if ($opts{'-nbsp'}) {
1546                 $str =~ s/ /&nbsp;/g;
1547         }
1548         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1549         return $str;
1550 }
1551
1552 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1553 sub sanitize {
1554         my $str = shift;
1555
1556         return undef unless defined $str;
1557
1558         $str = to_utf8($str);
1559         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1560         return $str;
1561 }
1562
1563 # Make control characters "printable", using character escape codes (CEC)
1564 sub quot_cec {
1565         my $cntrl = shift;
1566         my %opts = @_;
1567         my %es = ( # character escape codes, aka escape sequences
1568                 "\t" => '\t',   # tab            (HT)
1569                 "\n" => '\n',   # line feed      (LF)
1570                 "\r" => '\r',   # carrige return (CR)
1571                 "\f" => '\f',   # form feed      (FF)
1572                 "\b" => '\b',   # backspace      (BS)
1573                 "\a" => '\a',   # alarm (bell)   (BEL)
1574                 "\e" => '\e',   # escape         (ESC)
1575                 "\013" => '\v', # vertical tab   (VT)
1576                 "\000" => '\0', # nul character  (NUL)
1577         );
1578         my $chr = ( (exists $es{$cntrl})
1579                     ? $es{$cntrl}
1580                     : sprintf('\%2x', ord($cntrl)) );
1581         if ($opts{-nohtml}) {
1582                 return $chr;
1583         } else {
1584                 return "<span class=\"cntrl\">$chr</span>";
1585         }
1586 }
1587
1588 # Alternatively use unicode control pictures codepoints,
1589 # Unicode "printable representation" (PR)
1590 sub quot_upr {
1591         my $cntrl = shift;
1592         my %opts = @_;
1593
1594         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1595         if ($opts{-nohtml}) {
1596                 return $chr;
1597         } else {
1598                 return "<span class=\"cntrl\">$chr</span>";
1599         }
1600 }
1601
1602 # git may return quoted and escaped filenames
1603 sub unquote {
1604         my $str = shift;
1605
1606         sub unq {
1607                 my $seq = shift;
1608                 my %es = ( # character escape codes, aka escape sequences
1609                         't' => "\t",   # tab            (HT, TAB)
1610                         'n' => "\n",   # newline        (NL)
1611                         'r' => "\r",   # return         (CR)
1612                         'f' => "\f",   # form feed      (FF)
1613                         'b' => "\b",   # backspace      (BS)
1614                         'a' => "\a",   # alarm (bell)   (BEL)
1615                         'e' => "\e",   # escape         (ESC)
1616                         'v' => "\013", # vertical tab   (VT)
1617                 );
1618
1619                 if ($seq =~ m/^[0-7]{1,3}$/) {
1620                         # octal char sequence
1621                         return chr(oct($seq));
1622                 } elsif (exists $es{$seq}) {
1623                         # C escape sequence, aka character escape code
1624                         return $es{$seq};
1625                 }
1626                 # quoted ordinary character
1627                 return $seq;
1628         }
1629
1630         if ($str =~ m/^"(.*)"$/) {
1631                 # needs unquoting
1632                 $str = $1;
1633                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1634         }
1635         return $str;
1636 }
1637
1638 # escape tabs (convert tabs to spaces)
1639 sub untabify {
1640         my $line = shift;
1641
1642         while ((my $pos = index($line, "\t")) != -1) {
1643                 if (my $count = (8 - ($pos % 8))) {
1644                         my $spaces = ' ' x $count;
1645                         $line =~ s/\t/$spaces/;
1646                 }
1647         }
1648
1649         return $line;
1650 }
1651
1652 sub project_in_list {
1653         my $project = shift;
1654         my @list = git_get_projects_list();
1655         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1656 }
1657
1658 ## ----------------------------------------------------------------------
1659 ## HTML aware string manipulation
1660
1661 # Try to chop given string on a word boundary between position
1662 # $len and $len+$add_len. If there is no word boundary there,
1663 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1664 # (marking chopped part) would be longer than given string.
1665 sub chop_str {
1666         my $str = shift;
1667         my $len = shift;
1668         my $add_len = shift || 10;
1669         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1670
1671         # Make sure perl knows it is utf8 encoded so we don't
1672         # cut in the middle of a utf8 multibyte char.
1673         $str = to_utf8($str);
1674
1675         # allow only $len chars, but don't cut a word if it would fit in $add_len
1676         # if it doesn't fit, cut it if it's still longer than the dots we would add
1677         # remove chopped character entities entirely
1678
1679         # when chopping in the middle, distribute $len into left and right part
1680         # return early if chopping wouldn't make string shorter
1681         if ($where eq 'center') {
1682                 return $str if ($len + 5 >= length($str)); # filler is length 5
1683                 $len = int($len/2);
1684         } else {
1685                 return $str if ($len + 4 >= length($str)); # filler is length 4
1686         }
1687
1688         # regexps: ending and beginning with word part up to $add_len
1689         my $endre = qr/.{$len}\w{0,$add_len}/;
1690         my $begre = qr/\w{0,$add_len}.{$len}/;
1691
1692         if ($where eq 'left') {
1693                 $str =~ m/^(.*?)($begre)$/;
1694                 my ($lead, $body) = ($1, $2);
1695                 if (length($lead) > 4) {
1696                         $lead = " ...";
1697                 }
1698                 return "$lead$body";
1699
1700         } elsif ($where eq 'center') {
1701                 $str =~ m/^($endre)(.*)$/;
1702                 my ($left, $str)  = ($1, $2);
1703                 $str =~ m/^(.*?)($begre)$/;
1704                 my ($mid, $right) = ($1, $2);
1705                 if (length($mid) > 5) {
1706                         $mid = " ... ";
1707                 }
1708                 return "$left$mid$right";
1709
1710         } else {
1711                 $str =~ m/^($endre)(.*)$/;
1712                 my $body = $1;
1713                 my $tail = $2;
1714                 if (length($tail) > 4) {
1715                         $tail = "... ";
1716                 }
1717                 return "$body$tail";
1718         }
1719 }
1720
1721 # takes the same arguments as chop_str, but also wraps a <span> around the
1722 # result with a title attribute if it does get chopped. Additionally, the
1723 # string is HTML-escaped.
1724 sub chop_and_escape_str {
1725         my ($str) = @_;
1726
1727         my $chopped = chop_str(@_);
1728         $str = to_utf8($str);
1729         if ($chopped eq $str) {
1730                 return esc_html($chopped);
1731         } else {
1732                 $str =~ s/[[:cntrl:]]/?/g;
1733                 return $cgi->span({-title=>$str}, esc_html($chopped));
1734         }
1735 }
1736
1737 # Highlight selected fragments of string, using given CSS class,
1738 # and escape HTML.  It is assumed that fragments do not overlap.
1739 # Regions are passed as list of pairs (array references).
1740 #
1741 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1742 # '<span class="mark">foo</span>bar'
1743 sub esc_html_hl_regions {
1744         my ($str, $css_class, @sel) = @_;
1745         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1746         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1747         return esc_html($str, %opts) unless @sel;
1748
1749         my $out = '';
1750         my $pos = 0;
1751
1752         for my $s (@sel) {
1753                 my ($begin, $end) = @$s;
1754
1755                 # Don't create empty <span> elements.
1756                 next if $end <= $begin;
1757
1758                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1759                                        %opts);
1760
1761                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1762                         if ($begin - $pos > 0);
1763                 $out .= $cgi->span({-class => $css_class}, $escaped);
1764
1765                 $pos = $end;
1766         }
1767         $out .= esc_html(substr($str, $pos), %opts)
1768                 if ($pos < length($str));
1769
1770         return $out;
1771 }
1772
1773 # return positions of beginning and end of each match
1774 sub matchpos_list {
1775         my ($str, $regexp) = @_;
1776         return unless (defined $str && defined $regexp);
1777
1778         my @matches;
1779         while ($str =~ /$regexp/g) {
1780                 push @matches, [$-[0], $+[0]];
1781         }
1782         return @matches;
1783 }
1784
1785 # highlight match (if any), and escape HTML
1786 sub esc_html_match_hl {
1787         my ($str, $regexp) = @_;
1788         return esc_html($str) unless defined $regexp;
1789
1790         my @matches = matchpos_list($str, $regexp);
1791         return esc_html($str) unless @matches;
1792
1793         return esc_html_hl_regions($str, 'match', @matches);
1794 }
1795
1796
1797 # highlight match (if any) of shortened string, and escape HTML
1798 sub esc_html_match_hl_chopped {
1799         my ($str, $chopped, $regexp) = @_;
1800         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1801
1802         my @matches = matchpos_list($str, $regexp);
1803         return esc_html($chopped) unless @matches;
1804
1805         # filter matches so that we mark chopped string
1806         my $tail = "... "; # see chop_str
1807         unless ($chopped =~ s/\Q$tail\E$//) {
1808                 $tail = '';
1809         }
1810         my $chop_len = length($chopped);
1811         my $tail_len = length($tail);
1812         my @filtered;
1813
1814         for my $m (@matches) {
1815                 if ($m->[0] > $chop_len) {
1816                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1817                         last;
1818                 } elsif ($m->[1] > $chop_len) {
1819                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1820                         last;
1821                 }
1822                 push @filtered, $m;
1823         }
1824
1825         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1826 }
1827
1828 ## ----------------------------------------------------------------------
1829 ## functions returning short strings
1830
1831 # CSS class for given age value (in seconds)
1832 sub age_class {
1833         my $age = shift;
1834
1835         if (!defined $age) {
1836                 return "noage";
1837         } elsif ($age < 60*60*2) {
1838                 return "age0";
1839         } elsif ($age < 60*60*24*2) {
1840                 return "age1";
1841         } else {
1842                 return "age2";
1843         }
1844 }
1845
1846 # convert age in seconds to "nn units ago" string
1847 sub age_string {
1848         my $age = shift;
1849         my $age_str;
1850
1851         if ($age > 60*60*24*365*2) {
1852                 $age_str = (int $age/60/60/24/365);
1853                 $age_str .= " years ago";
1854         } elsif ($age > 60*60*24*(365/12)*2) {
1855                 $age_str = int $age/60/60/24/(365/12);
1856                 $age_str .= " months ago";
1857         } elsif ($age > 60*60*24*7*2) {
1858                 $age_str = int $age/60/60/24/7;
1859                 $age_str .= " weeks ago";
1860         } elsif ($age > 60*60*24*2) {
1861                 $age_str = int $age/60/60/24;
1862                 $age_str .= " days ago";
1863         } elsif ($age > 60*60*2) {
1864                 $age_str = int $age/60/60;
1865                 $age_str .= " hours ago";
1866         } elsif ($age > 60*2) {
1867                 $age_str = int $age/60;
1868                 $age_str .= " min ago";
1869         } elsif ($age > 2) {
1870                 $age_str = int $age;
1871                 $age_str .= " sec ago";
1872         } else {
1873                 $age_str .= " right now";
1874         }
1875         return $age_str;
1876 }
1877
1878 use constant {
1879         S_IFINVALID => 0030000,
1880         S_IFGITLINK => 0160000,
1881 };
1882
1883 # submodule/subproject, a commit object reference
1884 sub S_ISGITLINK {
1885         my $mode = shift;
1886
1887         return (($mode & S_IFMT) == S_IFGITLINK)
1888 }
1889
1890 # convert file mode in octal to symbolic file mode string
1891 sub mode_str {
1892         my $mode = oct shift;
1893
1894         if (S_ISGITLINK($mode)) {
1895                 return 'm---------';
1896         } elsif (S_ISDIR($mode & S_IFMT)) {
1897                 return 'drwxr-xr-x';
1898         } elsif (S_ISLNK($mode)) {
1899                 return 'lrwxrwxrwx';
1900         } elsif (S_ISREG($mode)) {
1901                 # git cares only about the executable bit
1902                 if ($mode & S_IXUSR) {
1903                         return '-rwxr-xr-x';
1904                 } else {
1905                         return '-rw-r--r--';
1906                 };
1907         } else {
1908                 return '----------';
1909         }
1910 }
1911
1912 # convert file mode in octal to file type string
1913 sub file_type {
1914         my $mode = shift;
1915
1916         if ($mode !~ m/^[0-7]+$/) {
1917                 return $mode;
1918         } else {
1919                 $mode = oct $mode;
1920         }
1921
1922         if (S_ISGITLINK($mode)) {
1923                 return "submodule";
1924         } elsif (S_ISDIR($mode & S_IFMT)) {
1925                 return "directory";
1926         } elsif (S_ISLNK($mode)) {
1927                 return "symlink";
1928         } elsif (S_ISREG($mode)) {
1929                 return "file";
1930         } else {
1931                 return "unknown";
1932         }
1933 }
1934
1935 # convert file mode in octal to file type description string
1936 sub file_type_long {
1937         my $mode = shift;
1938
1939         if ($mode !~ m/^[0-7]+$/) {
1940                 return $mode;
1941         } else {
1942                 $mode = oct $mode;
1943         }
1944
1945         if (S_ISGITLINK($mode)) {
1946                 return "submodule";
1947         } elsif (S_ISDIR($mode & S_IFMT)) {
1948                 return "directory";
1949         } elsif (S_ISLNK($mode)) {
1950                 return "symlink";
1951         } elsif (S_ISREG($mode)) {
1952                 if ($mode & S_IXUSR) {
1953                         return "executable";
1954                 } else {
1955                         return "file";
1956                 };
1957         } else {
1958                 return "unknown";
1959         }
1960 }
1961
1962
1963 ## ----------------------------------------------------------------------
1964 ## functions returning short HTML fragments, or transforming HTML fragments
1965 ## which don't belong to other sections
1966
1967 # format line of commit message.
1968 sub format_log_line_html {
1969         my $line = shift;
1970
1971         $line = esc_html($line, -nbsp=>1);
1972         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1973                 $cgi->a({-href => href(action=>"object", hash=>$1),
1974                                         -class => "text"}, $1);
1975         }eg;
1976
1977         return $line;
1978 }
1979
1980 # format marker of refs pointing to given object
1981
1982 # the destination action is chosen based on object type and current context:
1983 # - for annotated tags, we choose the tag view unless it's the current view
1984 #   already, in which case we go to shortlog view
1985 # - for other refs, we keep the current view if we're in history, shortlog or
1986 #   log view, and select shortlog otherwise
1987 sub format_ref_marker {
1988         my ($refs, $id) = @_;
1989         my $markers = '';
1990
1991         if (defined $refs->{$id}) {
1992                 foreach my $ref (@{$refs->{$id}}) {
1993                         # this code exploits the fact that non-lightweight tags are the
1994                         # only indirect objects, and that they are the only objects for which
1995                         # we want to use tag instead of shortlog as action
1996                         my ($type, $name) = qw();
1997                         my $indirect = ($ref =~ s/\^\{\}$//);
1998                         # e.g. tags/v2.6.11 or heads/next
1999                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2000                                 $type = $1;
2001                                 $name = $2;
2002                         } else {
2003                                 $type = "ref";
2004                                 $name = $ref;
2005                         }
2006
2007                         my $class = $type;
2008                         $class .= " indirect" if $indirect;
2009
2010                         my $dest_action = "shortlog";
2011
2012                         if ($indirect) {
2013                                 $dest_action = "tag" unless $action eq "tag";
2014                         } elsif ($action =~ /^(history|(short)?log)$/) {
2015                                 $dest_action = $action;
2016                         }
2017
2018                         my $dest = "";
2019                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2020                         $dest .= $ref;
2021
2022                         my $link = $cgi->a({
2023                                 -href => href(
2024                                         action=>$dest_action,
2025                                         hash=>$dest
2026                                 )}, $name);
2027
2028                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2029                                 $link . "</span>";
2030                 }
2031         }
2032
2033         if ($markers) {
2034                 return ' <span class="refs">'. $markers . '</span>';
2035         } else {
2036                 return "";
2037         }
2038 }
2039
2040 # format, perhaps shortened and with markers, title line
2041 sub format_subject_html {
2042         my ($long, $short, $href, $extra) = @_;
2043         $extra = '' unless defined($extra);
2044
2045         if (length($short) < length($long)) {
2046                 $long =~ s/[[:cntrl:]]/?/g;
2047                 return $cgi->a({-href => $href, -class => "list subject",
2048                                 -title => to_utf8($long)},
2049                        esc_html($short)) . $extra;
2050         } else {
2051                 return $cgi->a({-href => $href, -class => "list subject"},
2052                        esc_html($long)) . $extra;
2053         }
2054 }
2055
2056 # Rather than recomputing the url for an email multiple times, we cache it
2057 # after the first hit. This gives a visible benefit in views where the avatar
2058 # for the same email is used repeatedly (e.g. shortlog).
2059 # The cache is shared by all avatar engines (currently gravatar only), which
2060 # are free to use it as preferred. Since only one avatar engine is used for any
2061 # given page, there's no risk for cache conflicts.
2062 our %avatar_cache = ();
2063
2064 # Compute the picon url for a given email, by using the picon search service over at
2065 # http://www.cs.indiana.edu/picons/search.html
2066 sub picon_url {
2067         my $email = lc shift;
2068         if (!$avatar_cache{$email}) {
2069                 my ($user, $domain) = split('@', $email);
2070                 $avatar_cache{$email} =
2071                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2072                         "$domain/$user/" .
2073                         "users+domains+unknown/up/single";
2074         }
2075         return $avatar_cache{$email};
2076 }
2077
2078 # Compute the gravatar url for a given email, if it's not in the cache already.
2079 # Gravatar stores only the part of the URL before the size, since that's the
2080 # one computationally more expensive. This also allows reuse of the cache for
2081 # different sizes (for this particular engine).
2082 sub gravatar_url {
2083         my $email = lc shift;
2084         my $size = shift;
2085         $avatar_cache{$email} ||=
2086                 "http://www.gravatar.com/avatar/" .
2087                         Digest::MD5::md5_hex($email) . "?s=";
2088         return $avatar_cache{$email} . $size;
2089 }
2090
2091 # Insert an avatar for the given $email at the given $size if the feature
2092 # is enabled.
2093 sub git_get_avatar {
2094         my ($email, %opts) = @_;
2095         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2096         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2097         $opts{-size} ||= 'default';
2098         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2099         my $url = "";
2100         if ($git_avatar eq 'gravatar') {
2101                 $url = gravatar_url($email, $size);
2102         } elsif ($git_avatar eq 'picon') {
2103                 $url = picon_url($email);
2104         }
2105         # Other providers can be added by extending the if chain, defining $url
2106         # as needed. If no variant puts something in $url, we assume avatars
2107         # are completely disabled/unavailable.
2108         if ($url) {
2109                 return $pre_white .
2110                        "<img width=\"$size\" " .
2111                             "class=\"avatar\" " .
2112                             "src=\"".esc_url($url)."\" " .
2113                             "alt=\"\" " .
2114                        "/>" . $post_white;
2115         } else {
2116                 return "";
2117         }
2118 }
2119
2120 sub format_search_author {
2121         my ($author, $searchtype, $displaytext) = @_;
2122         my $have_search = gitweb_check_feature('search');
2123
2124         if ($have_search) {
2125                 my $performed = "";
2126                 if ($searchtype eq 'author') {
2127                         $performed = "authored";
2128                 } elsif ($searchtype eq 'committer') {
2129                         $performed = "committed";
2130                 }
2131
2132                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2133                                 searchtext=>$author,
2134                                 searchtype=>$searchtype), class=>"list",
2135                                 title=>"Search for commits $performed by $author"},
2136                                 $displaytext);
2137
2138         } else {
2139                 return $displaytext;
2140         }
2141 }
2142
2143 # format the author name of the given commit with the given tag
2144 # the author name is chopped and escaped according to the other
2145 # optional parameters (see chop_str).
2146 sub format_author_html {
2147         my $tag = shift;
2148         my $co = shift;
2149         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2150         return "<$tag class=\"author\">" .
2151                format_search_author($co->{'author_name'}, "author",
2152                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2153                        $author) .
2154                "</$tag>";
2155 }
2156
2157 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2158 sub format_git_diff_header_line {
2159         my $line = shift;
2160         my $diffinfo = shift;
2161         my ($from, $to) = @_;
2162
2163         if ($diffinfo->{'nparents'}) {
2164                 # combined diff
2165                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2166                 if ($to->{'href'}) {
2167                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2168                                          esc_path($to->{'file'}));
2169                 } else { # file was deleted (no href)
2170                         $line .= esc_path($to->{'file'});
2171                 }
2172         } else {
2173                 # "ordinary" diff
2174                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2175                 if ($from->{'href'}) {
2176                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2177                                          'a/' . esc_path($from->{'file'}));
2178                 } else { # file was added (no href)
2179                         $line .= 'a/' . esc_path($from->{'file'});
2180                 }
2181                 $line .= ' ';
2182                 if ($to->{'href'}) {
2183                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2184                                          'b/' . esc_path($to->{'file'}));
2185                 } else { # file was deleted
2186                         $line .= 'b/' . esc_path($to->{'file'});
2187                 }
2188         }
2189
2190         return "<div class=\"diff header\">$line</div>\n";
2191 }
2192
2193 # format extended diff header line, before patch itself
2194 sub format_extended_diff_header_line {
2195         my $line = shift;
2196         my $diffinfo = shift;
2197         my ($from, $to) = @_;
2198
2199         # match <path>
2200         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2201                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2202                                        esc_path($from->{'file'}));
2203         }
2204         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2205                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2206                                  esc_path($to->{'file'}));
2207         }
2208         # match single <mode>
2209         if ($line =~ m/\s(\d{6})$/) {
2210                 $line .= '<span class="info"> (' .
2211                          file_type_long($1) .
2212                          ')</span>';
2213         }
2214         # match <hash>
2215         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2216                 # can match only for combined diff
2217                 $line = 'index ';
2218                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2219                         if ($from->{'href'}[$i]) {
2220                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2221                                                   -class=>"hash"},
2222                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2223                         } else {
2224                                 $line .= '0' x 7;
2225                         }
2226                         # separator
2227                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2228                 }
2229                 $line .= '..';
2230                 if ($to->{'href'}) {
2231                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2232                                          substr($diffinfo->{'to_id'},0,7));
2233                 } else {
2234                         $line .= '0' x 7;
2235                 }
2236
2237         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2238                 # can match only for ordinary diff
2239                 my ($from_link, $to_link);
2240                 if ($from->{'href'}) {
2241                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2242                                              substr($diffinfo->{'from_id'},0,7));
2243                 } else {
2244                         $from_link = '0' x 7;
2245                 }
2246                 if ($to->{'href'}) {
2247                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2248                                            substr($diffinfo->{'to_id'},0,7));
2249                 } else {
2250                         $to_link = '0' x 7;
2251                 }
2252                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2253                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2254         }
2255
2256         return $line . "<br/>\n";
2257 }
2258
2259 # format from-file/to-file diff header
2260 sub format_diff_from_to_header {
2261         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2262         my $line;
2263         my $result = '';
2264
2265         $line = $from_line;
2266         #assert($line =~ m/^---/) if DEBUG;
2267         # no extra formatting for "^--- /dev/null"
2268         if (! $diffinfo->{'nparents'}) {
2269                 # ordinary (single parent) diff
2270                 if ($line =~ m!^--- "?a/!) {
2271                         if ($from->{'href'}) {
2272                                 $line = '--- a/' .
2273                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2274                                                 esc_path($from->{'file'}));
2275                         } else {
2276                                 $line = '--- a/' .
2277                                         esc_path($from->{'file'});
2278                         }
2279                 }
2280                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2281
2282         } else {
2283                 # combined diff (merge commit)
2284                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2285                         if ($from->{'href'}[$i]) {
2286                                 $line = '--- ' .
2287                                         $cgi->a({-href=>href(action=>"blobdiff",
2288                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2289                                                              hash_parent_base=>$parents[$i],
2290                                                              file_parent=>$from->{'file'}[$i],
2291                                                              hash=>$diffinfo->{'to_id'},
2292                                                              hash_base=>$hash,
2293                                                              file_name=>$to->{'file'}),
2294                                                  -class=>"path",
2295                                                  -title=>"diff" . ($i+1)},
2296                                                 $i+1) .
2297                                         '/' .
2298                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2299                                                 esc_path($from->{'file'}[$i]));
2300                         } else {
2301                                 $line = '--- /dev/null';
2302                         }
2303                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2304                 }
2305         }
2306
2307         $line = $to_line;
2308         #assert($line =~ m/^\+\+\+/) if DEBUG;
2309         # no extra formatting for "^+++ /dev/null"
2310         if ($line =~ m!^\+\+\+ "?b/!) {
2311                 if ($to->{'href'}) {
2312                         $line = '+++ b/' .
2313                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2314                                         esc_path($to->{'file'}));
2315                 } else {
2316                         $line = '+++ b/' .
2317                                 esc_path($to->{'file'});
2318                 }
2319         }
2320         $result .= qq!<div class="diff to_file">$line</div>\n!;
2321
2322         return $result;
2323 }
2324
2325 # create note for patch simplified by combined diff
2326 sub format_diff_cc_simplified {
2327         my ($diffinfo, @parents) = @_;
2328         my $result = '';
2329
2330         $result .= "<div class=\"diff header\">" .
2331                    "diff --cc ";
2332         if (!is_deleted($diffinfo)) {
2333                 $result .= $cgi->a({-href => href(action=>"blob",
2334                                                   hash_base=>$hash,
2335                                                   hash=>$diffinfo->{'to_id'},
2336                                                   file_name=>$diffinfo->{'to_file'}),
2337                                     -class => "path"},
2338                                    esc_path($diffinfo->{'to_file'}));
2339         } else {
2340                 $result .= esc_path($diffinfo->{'to_file'});
2341         }
2342         $result .= "</div>\n" . # class="diff header"
2343                    "<div class=\"diff nodifferences\">" .
2344                    "Simple merge" .
2345                    "</div>\n"; # class="diff nodifferences"
2346
2347         return $result;
2348 }
2349
2350 sub diff_line_class {
2351         my ($line, $from, $to) = @_;
2352
2353         # ordinary diff
2354         my $num_sign = 1;
2355         # combined diff
2356         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2357                 $num_sign = scalar @{$from->{'href'}};
2358         }
2359
2360         my @diff_line_classifier = (
2361                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2362                 { regexp => qr/^\\/,               class => "incomplete"  },
2363                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2364                 # classifier for context must come before classifier add/rem,
2365                 # or we would have to use more complicated regexp, for example
2366                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2367                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2368                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2369         );
2370         for my $clsfy (@diff_line_classifier) {
2371                 return $clsfy->{'class'}
2372                         if ($line =~ $clsfy->{'regexp'});
2373         }
2374
2375         # fallback
2376         return "";
2377 }
2378
2379 # assumes that $from and $to are defined and correctly filled,
2380 # and that $line holds a line of chunk header for unified diff
2381 sub format_unidiff_chunk_header {
2382         my ($line, $from, $to) = @_;
2383
2384         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2385                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2386
2387         $from_lines = 0 unless defined $from_lines;
2388         $to_lines   = 0 unless defined $to_lines;
2389
2390         if ($from->{'href'}) {
2391                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2392                                      -class=>"list"}, $from_text);
2393         }
2394         if ($to->{'href'}) {
2395                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2396                                      -class=>"list"}, $to_text);
2397         }
2398         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2399                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2400         return $line;
2401 }
2402
2403 # assumes that $from and $to are defined and correctly filled,
2404 # and that $line holds a line of chunk header for combined diff
2405 sub format_cc_diff_chunk_header {
2406         my ($line, $from, $to) = @_;
2407
2408         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2409         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2410
2411         @from_text = split(' ', $ranges);
2412         for (my $i = 0; $i < @from_text; ++$i) {
2413                 ($from_start[$i], $from_nlines[$i]) =
2414                         (split(',', substr($from_text[$i], 1)), 0);
2415         }
2416
2417         $to_text   = pop @from_text;
2418         $to_start  = pop @from_start;
2419         $to_nlines = pop @from_nlines;
2420
2421         $line = "<span class=\"chunk_info\">$prefix ";
2422         for (my $i = 0; $i < @from_text; ++$i) {
2423                 if ($from->{'href'}[$i]) {
2424                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2425                                           -class=>"list"}, $from_text[$i]);
2426                 } else {
2427                         $line .= $from_text[$i];
2428                 }
2429                 $line .= " ";
2430         }
2431         if ($to->{'href'}) {
2432                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2433                                   -class=>"list"}, $to_text);
2434         } else {
2435                 $line .= $to_text;
2436         }
2437         $line .= " $prefix</span>" .
2438                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2439         return $line;
2440 }
2441
2442 # process patch (diff) line (not to be used for diff headers),
2443 # returning HTML-formatted (but not wrapped) line.
2444 # If the line is passed as a reference, it is treated as HTML and not
2445 # esc_html()'ed.
2446 sub format_diff_line {
2447         my ($line, $diff_class, $from, $to) = @_;
2448
2449         if (ref($line)) {
2450                 $line = $$line;
2451         } else {
2452                 chomp $line;
2453                 $line = untabify($line);
2454
2455                 if ($from && $to && $line =~ m/^\@{2} /) {
2456                         $line = format_unidiff_chunk_header($line, $from, $to);
2457                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2458                         $line = format_cc_diff_chunk_header($line, $from, $to);
2459                 } else {
2460                         $line = esc_html($line, -nbsp=>1);
2461                 }
2462         }
2463
2464         my $diff_classes = "diff";
2465         $diff_classes .= " $diff_class" if ($diff_class);
2466         $line = "<div class=\"$diff_classes\">$line</div>\n";
2467
2468         return $line;
2469 }
2470
2471 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2472 # linked.  Pass the hash of the tree/commit to snapshot.
2473 sub format_snapshot_links {
2474         my ($hash) = @_;
2475         my $num_fmts = @snapshot_fmts;
2476         if ($num_fmts > 1) {
2477                 # A parenthesized list of links bearing format names.
2478                 # e.g. "snapshot (_tar.gz_ _zip_)"
2479                 return "snapshot (" . join(' ', map
2480                         $cgi->a({
2481                                 -href => href(
2482                                         action=>"snapshot",
2483                                         hash=>$hash,
2484                                         snapshot_format=>$_
2485                                 )
2486                         }, $known_snapshot_formats{$_}{'display'})
2487                 , @snapshot_fmts) . ")";
2488         } elsif ($num_fmts == 1) {
2489                 # A single "snapshot" link whose tooltip bears the format name.
2490                 # i.e. "_snapshot_"
2491                 my ($fmt) = @snapshot_fmts;
2492                 return
2493                         $cgi->a({
2494                                 -href => href(
2495                                         action=>"snapshot",
2496                                         hash=>$hash,
2497                                         snapshot_format=>$fmt
2498                                 ),
2499                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2500                         }, "snapshot");
2501         } else { # $num_fmts == 0
2502                 return undef;
2503         }
2504 }
2505
2506 ## ......................................................................
2507 ## functions returning values to be passed, perhaps after some
2508 ## transformation, to other functions; e.g. returning arguments to href()
2509
2510 # returns hash to be passed to href to generate gitweb URL
2511 # in -title key it returns description of link
2512 sub get_feed_info {
2513         my $format = shift || 'Atom';
2514         my %res = (action => lc($format));
2515
2516         # feed links are possible only for project views
2517         return unless (defined $project);
2518         # some views should link to OPML, or to generic project feed,
2519         # or don't have specific feed yet (so they should use generic)
2520         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2521
2522         my $branch;
2523         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2524         # from tag links; this also makes possible to detect branch links
2525         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2526             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2527                 $branch = $1;
2528         }
2529         # find log type for feed description (title)
2530         my $type = 'log';
2531         if (defined $file_name) {
2532                 $type  = "history of $file_name";
2533                 $type .= "/" if ($action eq 'tree');
2534                 $type .= " on '$branch'" if (defined $branch);
2535         } else {
2536                 $type = "log of $branch" if (defined $branch);
2537         }
2538
2539         $res{-title} = $type;
2540         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2541         $res{'file_name'} = $file_name;
2542
2543         return %res;
2544 }
2545
2546 ## ----------------------------------------------------------------------
2547 ## git utility subroutines, invoking git commands
2548
2549 # returns path to the core git executable and the --git-dir parameter as list
2550 sub git_cmd {
2551         $number_of_git_cmds++;
2552         return $GIT, '--git-dir='.$git_dir;
2553 }
2554
2555 # quote the given arguments for passing them to the shell
2556 # quote_command("command", "arg 1", "arg with ' and ! characters")
2557 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2558 # Try to avoid using this function wherever possible.
2559 sub quote_command {
2560         return join(' ',
2561                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2562 }
2563
2564 # get HEAD ref of given project as hash
2565 sub git_get_head_hash {
2566         return git_get_full_hash(shift, 'HEAD');
2567 }
2568
2569 sub git_get_full_hash {
2570         return git_get_hash(@_);
2571 }
2572
2573 sub git_get_short_hash {
2574         return git_get_hash(@_, '--short=7');
2575 }
2576
2577 sub git_get_hash {
2578         my ($project, $hash, @options) = @_;
2579         my $o_git_dir = $git_dir;
2580         my $retval = undef;
2581         $git_dir = "$projectroot/$project";
2582         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2583             '--verify', '-q', @options, $hash) {
2584                 $retval = <$fd>;
2585                 chomp $retval if defined $retval;
2586                 close $fd;
2587         }
2588         if (defined $o_git_dir) {
2589                 $git_dir = $o_git_dir;
2590         }
2591         return $retval;
2592 }
2593
2594 # get type of given object
2595 sub git_get_type {
2596         my $hash = shift;
2597
2598         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2599         my $type = <$fd>;
2600         close $fd or return;
2601         chomp $type;
2602         return $type;
2603 }
2604
2605 # repository configuration
2606 our $config_file = '';
2607 our %config;
2608
2609 # store multiple values for single key as anonymous array reference
2610 # single values stored directly in the hash, not as [ <value> ]
2611 sub hash_set_multi {
2612         my ($hash, $key, $value) = @_;
2613
2614         if (!exists $hash->{$key}) {
2615                 $hash->{$key} = $value;
2616         } elsif (!ref $hash->{$key}) {
2617                 $hash->{$key} = [ $hash->{$key}, $value ];
2618         } else {
2619                 push @{$hash->{$key}}, $value;
2620         }
2621 }
2622
2623 # return hash of git project configuration
2624 # optionally limited to some section, e.g. 'gitweb'
2625 sub git_parse_project_config {
2626         my $section_regexp = shift;
2627         my %config;
2628
2629         local $/ = "\0";
2630
2631         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2632                 or return;
2633
2634         while (my $keyval = <$fh>) {
2635                 chomp $keyval;
2636                 my ($key, $value) = split(/\n/, $keyval, 2);
2637
2638                 hash_set_multi(\%config, $key, $value)
2639                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2640         }
2641         close $fh;
2642
2643         return %config;
2644 }
2645
2646 # convert config value to boolean: 'true' or 'false'
2647 # no value, number > 0, 'true' and 'yes' values are true
2648 # rest of values are treated as false (never as error)
2649 sub config_to_bool {
2650         my $val = shift;
2651
2652         return 1 if !defined $val;             # section.key
2653
2654         # strip leading and trailing whitespace
2655         $val =~ s/^\s+//;
2656         $val =~ s/\s+$//;
2657
2658         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2659                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2660 }
2661
2662 # convert config value to simple decimal number
2663 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2664 # to be multiplied by 1024, 1048576, or 1073741824
2665 sub config_to_int {
2666         my $val = shift;
2667
2668         # strip leading and trailing whitespace
2669         $val =~ s/^\s+//;
2670         $val =~ s/\s+$//;
2671
2672         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2673                 $unit = lc($unit);
2674                 # unknown unit is treated as 1
2675                 return $num * ($unit eq 'g' ? 1073741824 :
2676                                $unit eq 'm' ?    1048576 :
2677                                $unit eq 'k' ?       1024 : 1);
2678         }
2679         return $val;
2680 }
2681
2682 # convert config value to array reference, if needed
2683 sub config_to_multi {
2684         my $val = shift;
2685
2686         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2687 }
2688
2689 sub git_get_project_config {
2690         my ($key, $type) = @_;
2691
2692         return unless defined $git_dir;
2693
2694         # key sanity check
2695         return unless ($key);
2696         # only subsection, if exists, is case sensitive,
2697         # and not lowercased by 'git config -z -l'
2698         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2699                 $key = join(".", lc($hi), $mi, lc($lo));
2700         } else {
2701                 $key = lc($key);
2702         }
2703         $key =~ s/^gitweb\.//;
2704         return if ($key =~ m/\W/);
2705
2706         # type sanity check
2707         if (defined $type) {
2708                 $type =~ s/^--//;
2709                 $type = undef
2710                         unless ($type eq 'bool' || $type eq 'int');
2711         }
2712
2713         # get config
2714         if (!defined $config_file ||
2715             $config_file ne "$git_dir/config") {
2716                 %config = git_parse_project_config('gitweb');
2717                 $config_file = "$git_dir/config";
2718         }
2719
2720         # check if config variable (key) exists
2721         return unless exists $config{"gitweb.$key"};
2722
2723         # ensure given type
2724         if (!defined $type) {
2725                 return $config{"gitweb.$key"};
2726         } elsif ($type eq 'bool') {
2727                 # backward compatibility: 'git config --bool' returns true/false
2728                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2729         } elsif ($type eq 'int') {
2730                 return config_to_int($config{"gitweb.$key"});
2731         }
2732         return $config{"gitweb.$key"};
2733 }
2734
2735 # get hash of given path at given ref
2736 sub git_get_hash_by_path {
2737         my $base = shift;
2738         my $path = shift || return undef;
2739         my $type = shift;
2740
2741         $path =~ s,/+$,,;
2742
2743         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2744                 or die_error(500, "Open git-ls-tree failed");
2745         my $line = <$fd>;
2746         close $fd or return undef;
2747
2748         if (!defined $line) {
2749                 # there is no tree or hash given by $path at $base
2750                 return undef;
2751         }
2752
2753         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2754         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2755         if (defined $type && $type ne $2) {
2756                 # type doesn't match
2757                 return undef;
2758         }
2759         return $3;
2760 }
2761
2762 # get path of entry with given hash at given tree-ish (ref)
2763 # used to get 'from' filename for combined diff (merge commit) for renames
2764 sub git_get_path_by_hash {
2765         my $base = shift || return;
2766         my $hash = shift || return;
2767
2768         local $/ = "\0";
2769
2770         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2771                 or return undef;
2772         while (my $line = <$fd>) {
2773                 chomp $line;
2774
2775                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2776                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2777                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2778                         close $fd;
2779                         return $1;
2780                 }
2781         }
2782         close $fd;
2783         return undef;
2784 }
2785
2786 ## ......................................................................
2787 ## git utility functions, directly accessing git repository
2788
2789 # get the value of config variable either from file named as the variable
2790 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2791 # configuration variable in the repository config file.
2792 sub git_get_file_or_project_config {
2793         my ($path, $name) = @_;
2794
2795         $git_dir = "$projectroot/$path";
2796         open my $fd, '<', "$git_dir/$name"
2797                 or return git_get_project_config($name);
2798         my $conf = <$fd>;
2799         close $fd;
2800         if (defined $conf) {
2801                 chomp $conf;
2802         }
2803         return $conf;
2804 }
2805
2806 sub git_get_project_description {
2807         my $path = shift;
2808         return git_get_file_or_project_config($path, 'description');
2809 }
2810
2811 sub git_get_project_category {
2812         my $path = shift;
2813         return git_get_file_or_project_config($path, 'category');
2814 }
2815
2816
2817 # supported formats:
2818 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2819 #   - if its contents is a number, use it as tag weight,
2820 #   - otherwise add a tag with weight 1
2821 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2822 #   the same value multiple times increases tag weight
2823 # * `gitweb.ctag' multi-valued repo config variable
2824 sub git_get_project_ctags {
2825         my $project = shift;
2826         my $ctags = {};
2827
2828         $git_dir = "$projectroot/$project";
2829         if (opendir my $dh, "$git_dir/ctags") {
2830                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2831                 foreach my $tagfile (@files) {
2832                         open my $ct, '<', $tagfile
2833                                 or next;
2834                         my $val = <$ct>;
2835                         chomp $val if $val;
2836                         close $ct;
2837
2838                         (my $ctag = $tagfile) =~ s#.*/##;
2839                         if ($val =~ /^\d+$/) {
2840                                 $ctags->{$ctag} = $val;
2841                         } else {
2842                                 $ctags->{$ctag} = 1;
2843                         }
2844                 }
2845                 closedir $dh;
2846
2847         } elsif (open my $fh, '<', "$git_dir/ctags") {
2848                 while (my $line = <$fh>) {
2849                         chomp $line;
2850                         $ctags->{$line}++ if $line;
2851                 }
2852                 close $fh;
2853
2854         } else {
2855                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2856                 foreach my $tag (@$taglist) {
2857                         $ctags->{$tag}++;
2858                 }
2859         }
2860
2861         return $ctags;
2862 }
2863
2864 # return hash, where keys are content tags ('ctags'),
2865 # and values are sum of weights of given tag in every project
2866 sub git_gather_all_ctags {
2867         my $projects = shift;
2868         my $ctags = {};
2869
2870         foreach my $p (@$projects) {
2871                 foreach my $ct (keys %{$p->{'ctags'}}) {
2872                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2873                 }
2874         }
2875
2876         return $ctags;
2877 }
2878
2879 sub git_populate_project_tagcloud {
2880         my $ctags = shift;
2881
2882         # First, merge different-cased tags; tags vote on casing
2883         my %ctags_lc;
2884         foreach (keys %$ctags) {
2885                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2886                 if (not $ctags_lc{lc $_}->{topcount}
2887                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2888                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2889                         $ctags_lc{lc $_}->{topname} = $_;
2890                 }
2891         }
2892
2893         my $cloud;
2894         my $matched = $input_params{'ctag'};
2895         if (eval { require HTML::TagCloud; 1; }) {
2896                 $cloud = HTML::TagCloud->new;
2897                 foreach my $ctag (sort keys %ctags_lc) {
2898                         # Pad the title with spaces so that the cloud looks
2899                         # less crammed.
2900                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2901                         $title =~ s/ /&nbsp;/g;
2902                         $title =~ s/^/&nbsp;/g;
2903                         $title =~ s/$/&nbsp;/g;
2904                         if (defined $matched && $matched eq $ctag) {
2905                                 $title = qq(<span class="match">$title</span>);
2906                         }
2907                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2908                                     $ctags_lc{$ctag}->{count});
2909                 }
2910         } else {
2911                 $cloud = {};
2912                 foreach my $ctag (keys %ctags_lc) {
2913                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2914                         if (defined $matched && $matched eq $ctag) {
2915                                 $title = qq(<span class="match">$title</span>);
2916                         }
2917                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2918                         $cloud->{$ctag}{ctag} =
2919                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2920                 }
2921         }
2922         return $cloud;
2923 }
2924
2925 sub git_show_project_tagcloud {
2926         my ($cloud, $count) = @_;
2927         if (ref $cloud eq 'HTML::TagCloud') {
2928                 return $cloud->html_and_css($count);
2929         } else {
2930                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2931                 return
2932                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2933                         join (', ', map {
2934                                 $cloud->{$_}->{'ctag'}
2935                         } splice(@tags, 0, $count)) .
2936                         '</div>';
2937         }
2938 }
2939
2940 sub git_get_project_url_list {
2941         my $path = shift;
2942
2943         $git_dir = "$projectroot/$path";
2944         open my $fd, '<', "$git_dir/cloneurl"
2945                 or return wantarray ?
2946                 @{ config_to_multi(git_get_project_config('url')) } :
2947                    config_to_multi(git_get_project_config('url'));
2948         my @git_project_url_list = map { chomp; $_ } <$fd>;
2949         close $fd;
2950
2951         return wantarray ? @git_project_url_list : \@git_project_url_list;
2952 }
2953
2954 sub git_get_projects_list {
2955         my $filter = shift || '';
2956         my $paranoid = shift;
2957         my @list;
2958
2959         if (-d $projects_list) {
2960                 # search in directory
2961                 my $dir = $projects_list;
2962                 # remove the trailing "/"
2963                 $dir =~ s!/+$!!;
2964                 my $pfxlen = length("$dir");
2965                 my $pfxdepth = ($dir =~ tr!/!!);
2966                 # when filtering, search only given subdirectory
2967                 if ($filter && !$paranoid) {
2968                         $dir .= "/$filter";
2969                         $dir =~ s!/+$!!;
2970                 }
2971
2972                 File::Find::find({
2973                         follow_fast => 1, # follow symbolic links
2974                         follow_skip => 2, # ignore duplicates
2975                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2976                         wanted => sub {
2977                                 # global variables
2978                                 our $project_maxdepth;
2979                                 our $projectroot;
2980                                 # skip project-list toplevel, if we get it.
2981                                 return if (m!^[/.]$!);
2982                                 # only directories can be git repositories
2983                                 return unless (-d $_);
2984                                 # don't traverse too deep (Find is super slow on os x)
2985                                 # $project_maxdepth excludes depth of $projectroot
2986                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2987                                         $File::Find::prune = 1;
2988                                         return;
2989                                 }
2990
2991                                 my $path = substr($File::Find::name, $pfxlen + 1);
2992                                 # paranoidly only filter here
2993                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2994                                         next;
2995                                 }
2996                                 # we check related file in $projectroot
2997                                 if (check_export_ok("$projectroot/$path")) {
2998                                         push @list, { path => $path };
2999                                         $File::Find::prune = 1;
3000                                 }
3001                         },
3002                 }, "$dir");
3003
3004         } elsif (-f $projects_list) {
3005                 # read from file(url-encoded):
3006                 # 'git%2Fgit.git Linus+Torvalds'
3007                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3008                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3009                 open my $fd, '<', $projects_list or return;
3010         PROJECT:
3011                 while (my $line = <$fd>) {
3012                         chomp $line;
3013                         my ($path, $owner) = split ' ', $line;
3014                         $path = unescape($path);
3015                         $owner = unescape($owner);
3016                         if (!defined $path) {
3017                                 next;
3018                         }
3019                         # if $filter is rpovided, check if $path begins with $filter
3020                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3021                                 next;
3022                         }
3023                         if (check_export_ok("$projectroot/$path")) {
3024                                 my $pr = {
3025                                         path => $path
3026                                 };
3027                                 if ($owner) {
3028                                         $pr->{'owner'} = to_utf8($owner);
3029                                 }
3030                                 push @list, $pr;
3031                         }
3032                 }
3033                 close $fd;
3034         }
3035         return @list;
3036 }
3037
3038 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3039 # as side effects it sets 'forks' field to list of forks for forked projects
3040 sub filter_forks_from_projects_list {
3041         my $projects = shift;
3042
3043         my %trie; # prefix tree of directories (path components)
3044         # generate trie out of those directories that might contain forks
3045         foreach my $pr (@$projects) {
3046                 my $path = $pr->{'path'};
3047                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3048                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3049                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3050                 next unless (-d "$projectroot/$path"); # containing directory exists
3051                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3052
3053                 # add to trie
3054                 my @dirs = split('/', $path);
3055                 # walk the trie, until either runs out of components or out of trie
3056                 my $ref = \%trie;
3057                 while (scalar @dirs &&
3058                        exists($ref->{$dirs[0]})) {
3059                         $ref = $ref->{shift @dirs};
3060                 }
3061                 # create rest of trie structure from rest of components
3062                 foreach my $dir (@dirs) {
3063                         $ref = $ref->{$dir} = {};
3064                 }
3065                 # create end marker, store $pr as a data
3066                 $ref->{''} = $pr if (!exists $ref->{''});
3067         }
3068
3069         # filter out forks, by finding shortest prefix match for paths
3070         my @filtered;
3071  PROJECT:
3072         foreach my $pr (@$projects) {
3073                 # trie lookup
3074                 my $ref = \%trie;
3075         DIR:
3076                 foreach my $dir (split('/', $pr->{'path'})) {
3077                         if (exists $ref->{''}) {
3078                                 # found [shortest] prefix, is a fork - skip it
3079                                 push @{$ref->{''}{'forks'}}, $pr;
3080                                 next PROJECT;
3081                         }
3082                         if (!exists $ref->{$dir}) {
3083                                 # not in trie, cannot have prefix, not a fork
3084                                 push @filtered, $pr;
3085                                 next PROJECT;
3086                         }
3087                         # If the dir is there, we just walk one step down the trie.
3088                         $ref = $ref->{$dir};
3089                 }
3090                 # we ran out of trie
3091                 # (shouldn't happen: it's either no match, or end marker)
3092                 push @filtered, $pr;
3093         }
3094
3095         return @filtered;
3096 }
3097
3098 # note: fill_project_list_info must be run first,
3099 # for 'descr_long' and 'ctags' to be filled
3100 sub search_projects_list {
3101         my ($projlist, %opts) = @_;
3102         my $tagfilter  = $opts{'tagfilter'};
3103         my $search_re = $opts{'search_regexp'};
3104
3105         return @$projlist
3106                 unless ($tagfilter || $search_re);
3107
3108         # searching projects require filling to be run before it;
3109         fill_project_list_info($projlist,
3110                                $tagfilter  ? 'ctags' : (),
3111                                $search_re ? ('path', 'descr') : ());
3112         my @projects;
3113  PROJECT:
3114         foreach my $pr (@$projlist) {
3115
3116                 if ($tagfilter) {
3117                         next unless ref($pr->{'ctags'}) eq 'HASH';
3118                         next unless
3119                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3120                 }
3121
3122                 if ($search_re) {
3123                         next unless
3124                                 $pr->{'path'} =~ /$search_re/ ||
3125                                 $pr->{'descr_long'} =~ /$search_re/;
3126                 }
3127
3128                 push @projects, $pr;
3129         }
3130
3131         return @projects;
3132 }
3133
3134 our $gitweb_project_owner = undef;
3135 sub git_get_project_list_from_file {
3136
3137         return if (defined $gitweb_project_owner);
3138
3139         $gitweb_project_owner = {};
3140         # read from file (url-encoded):
3141         # 'git%2Fgit.git Linus+Torvalds'
3142         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3143         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3144         if (-f $projects_list) {
3145                 open(my $fd, '<', $projects_list);
3146                 while (my $line = <$fd>) {
3147                         chomp $line;
3148                         my ($pr, $ow) = split ' ', $line;
3149                         $pr = unescape($pr);
3150                         $ow = unescape($ow);
3151                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3152                 }
3153                 close $fd;
3154         }
3155 }
3156
3157 sub git_get_project_owner {
3158         my $project = shift;
3159         my $owner;
3160
3161         return undef unless $project;
3162         $git_dir = "$projectroot/$project";
3163
3164         if (!defined $gitweb_project_owner) {
3165                 git_get_project_list_from_file();
3166         }
3167
3168         if (exists $gitweb_project_owner->{$project}) {
3169                 $owner = $gitweb_project_owner->{$project};
3170         }
3171         if (!defined $owner){
3172                 $owner = git_get_project_config('owner');
3173         }
3174         if (!defined $owner) {
3175                 $owner = get_file_owner("$git_dir");
3176         }
3177
3178         return $owner;
3179 }
3180
3181 sub git_get_last_activity {
3182         my ($path) = @_;
3183         my $fd;
3184
3185         $git_dir = "$projectroot/$path";
3186         open($fd, "-|", git_cmd(), 'for-each-ref',
3187              '--format=%(committer)',
3188              '--sort=-committerdate',
3189              '--count=1',
3190              'refs/heads') or return;
3191         my $most_recent = <$fd>;
3192         close $fd or return;
3193         if (defined $most_recent &&
3194             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3195                 my $timestamp = $1;
3196                 my $age = time - $timestamp;
3197                 return ($age, age_string($age));
3198         }
3199         return (undef, undef);
3200 }
3201
3202 # Implementation note: when a single remote is wanted, we cannot use 'git
3203 # remote show -n' because that command always work (assuming it's a remote URL
3204 # if it's not defined), and we cannot use 'git remote show' because that would
3205 # try to make a network roundtrip. So the only way to find if that particular
3206 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3207 # and when we find what we want.
3208 sub git_get_remotes_list {
3209         my $wanted = shift;
3210         my %remotes = ();
3211
3212         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3213         return unless $fd;
3214         while (my $remote = <$fd>) {
3215                 chomp $remote;
3216                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3217                 next if $wanted and not $remote eq $wanted;
3218                 my ($url, $key) = ($1, $2);
3219
3220                 $remotes{$remote} ||= { 'heads' => () };
3221                 $remotes{$remote}{$key} = $url;
3222         }
3223         close $fd or return;
3224         return wantarray ? %remotes : \%remotes;
3225 }
3226
3227 # Takes a hash of remotes as first parameter and fills it by adding the
3228 # available remote heads for each of the indicated remotes.
3229 sub fill_remote_heads {
3230         my $remotes = shift;
3231         my @heads = map { "remotes/$_" } keys %$remotes;
3232         my @remoteheads = git_get_heads_list(undef, @heads);
3233         foreach my $remote (keys %$remotes) {
3234                 $remotes->{$remote}{'heads'} = [ grep {
3235                         $_->{'name'} =~ s!^$remote/!!
3236                         } @remoteheads ];
3237         }
3238 }
3239
3240 sub git_get_references {
3241         my $type = shift || "";
3242         my %refs;
3243         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3244         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3245         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3246                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3247                 or return;
3248
3249         while (my $line = <$fd>) {
3250                 chomp $line;
3251                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3252                         if (defined $refs{$1}) {
3253                                 push @{$refs{$1}}, $2;
3254                         } else {
3255                                 $refs{$1} = [ $2 ];
3256                         }
3257                 }
3258         }
3259         close $fd or return;
3260         return \%refs;
3261 }
3262
3263 sub git_get_rev_name_tags {
3264         my $hash = shift || return undef;
3265
3266         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3267                 or return;
3268         my $name_rev = <$fd>;
3269         close $fd;
3270
3271         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3272                 return $1;
3273         } else {
3274                 # catches also '$hash undefined' output
3275                 return undef;
3276         }
3277 }
3278
3279 ## ----------------------------------------------------------------------
3280 ## parse to hash functions
3281
3282 sub parse_date {
3283         my $epoch = shift;
3284         my $tz = shift || "-0000";
3285
3286         my %date;
3287         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3288         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3289         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3290         $date{'hour'} = $hour;
3291         $date{'minute'} = $min;
3292         $date{'mday'} = $mday;
3293         $date{'day'} = $days[$wday];
3294         $date{'month'} = $months[$mon];
3295         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3296                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3297         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3298                              $mday, $months[$mon], $hour ,$min;
3299         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3300                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3301
3302         my ($tz_sign, $tz_hour, $tz_min) =
3303                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3304         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3305         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3306         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3307         $date{'hour_local'} = $hour;
3308         $date{'minute_local'} = $min;
3309         $date{'tz_local'} = $tz;
3310         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3311                                   1900+$year, $mon+1, $mday,
3312                                   $hour, $min, $sec, $tz);
3313         return %date;
3314 }
3315
3316 sub parse_tag {
3317         my $tag_id = shift;
3318         my %tag;
3319         my @comment;
3320
3321         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3322         $tag{'id'} = $tag_id;
3323         while (my $line = <$fd>) {
3324                 chomp $line;
3325                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3326                         $tag{'object'} = $1;
3327                 } elsif ($line =~ m/^type (.+)$/) {
3328                         $tag{'type'} = $1;
3329                 } elsif ($line =~ m/^tag (.+)$/) {
3330                         $tag{'name'} = $1;
3331                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3332                         $tag{'author'} = $1;
3333                         $tag{'author_epoch'} = $2;
3334                         $tag{'author_tz'} = $3;
3335                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3336                                 $tag{'author_name'}  = $1;
3337                                 $tag{'author_email'} = $2;
3338                         } else {
3339                                 $tag{'author_name'} = $tag{'author'};
3340                         }
3341                 } elsif ($line =~ m/--BEGIN/) {
3342                         push @comment, $line;
3343                         last;
3344                 } elsif ($line eq "") {
3345                         last;
3346                 }
3347         }
3348         push @comment, <$fd>;
3349         $tag{'comment'} = \@comment;
3350         close $fd or return;
3351         if (!defined $tag{'name'}) {
3352                 return
3353         };
3354         return %tag
3355 }
3356
3357 sub parse_commit_text {
3358         my ($commit_text, $withparents) = @_;
3359         my @commit_lines = split '\n', $commit_text;
3360         my %co;
3361
3362         pop @commit_lines; # Remove '\0'
3363
3364         if (! @commit_lines) {
3365                 return;
3366         }
3367
3368         my $header = shift @commit_lines;
3369         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3370                 return;
3371         }
3372         ($co{'id'}, my @parents) = split ' ', $header;
3373         while (my $line = shift @commit_lines) {
3374                 last if $line eq "\n";
3375                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3376                         $co{'tree'} = $1;
3377                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3378                         push @parents, $1;
3379                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3380                         $co{'author'} = to_utf8($1);
3381                         $co{'author_epoch'} = $2;
3382                         $co{'author_tz'} = $3;
3383                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3384                                 $co{'author_name'}  = $1;
3385                                 $co{'author_email'} = $2;
3386                         } else {
3387                                 $co{'author_name'} = $co{'author'};
3388                         }
3389                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3390                         $co{'committer'} = to_utf8($1);
3391                         $co{'committer_epoch'} = $2;
3392                         $co{'committer_tz'} = $3;
3393                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3394                                 $co{'committer_name'}  = $1;
3395                                 $co{'committer_email'} = $2;
3396                         } else {
3397                                 $co{'committer_name'} = $co{'committer'};
3398                         }
3399                 }
3400         }
3401         if (!defined $co{'tree'}) {
3402                 return;
3403         };
3404         $co{'parents'} = \@parents;
3405         $co{'parent'} = $parents[0];
3406
3407         foreach my $title (@commit_lines) {
3408                 $title =~ s/^    //;
3409                 if ($title ne "") {
3410                         $co{'title'} = chop_str($title, 80, 5);
3411                         # remove leading stuff of merges to make the interesting part visible
3412                         if (length($title) > 50) {
3413                                 $title =~ s/^Automatic //;
3414                                 $title =~ s/^merge (of|with) /Merge ... /i;
3415                                 if (length($title) > 50) {
3416                                         $title =~ s/(http|rsync):\/\///;
3417                                 }
3418                                 if (length($title) > 50) {
3419                                         $title =~ s/(master|www|rsync)\.//;
3420                                 }
3421                                 if (length($title) > 50) {
3422                                         $title =~ s/kernel.org:?//;
3423                                 }
3424                                 if (length($title) > 50) {
3425                                         $title =~ s/\/pub\/scm//;
3426                                 }
3427                         }
3428                         $co{'title_short'} = chop_str($title, 50, 5);
3429                         last;
3430                 }
3431         }
3432         if (! defined $co{'title'} || $co{'title'} eq "") {
3433                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3434         }
3435         # remove added spaces
3436         foreach my $line (@commit_lines) {
3437                 $line =~ s/^    //;
3438         }
3439         $co{'comment'} = \@commit_lines;
3440
3441         my $age = time - $co{'committer_epoch'};
3442         $co{'age'} = $age;
3443         $co{'age_string'} = age_string($age);
3444         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3445         if ($age > 60*60*24*7*2) {
3446                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3447                 $co{'age_string_age'} = $co{'age_string'};
3448         } else {
3449                 $co{'age_string_date'} = $co{'age_string'};
3450                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3451         }
3452         return %co;
3453 }
3454
3455 sub parse_commit {
3456         my ($commit_id) = @_;
3457         my %co;
3458
3459         local $/ = "\0";
3460
3461         open my $fd, "-|", git_cmd(), "rev-list",
3462                 "--parents",
3463                 "--header",
3464                 "--max-count=1",
3465                 $commit_id,
3466                 "--",
3467                 or die_error(500, "Open git-rev-list failed");
3468         %co = parse_commit_text(<$fd>, 1);
3469         close $fd;
3470
3471         return %co;
3472 }
3473
3474 sub parse_commits {
3475         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3476         my @cos;
3477
3478         $maxcount ||= 1;
3479         $skip ||= 0;
3480
3481         local $/ = "\0";
3482
3483         open my $fd, "-|", git_cmd(), "rev-list",
3484                 "--header",
3485                 @args,
3486                 ("--max-count=" . $maxcount),
3487                 ("--skip=" . $skip),
3488                 @extra_options,
3489                 $commit_id,
3490                 "--",
3491                 ($filename ? ($filename) : ())
3492                 or die_error(500, "Open git-rev-list failed");
3493         while (my $line = <$fd>) {
3494                 my %co = parse_commit_text($line);
3495                 push @cos, \%co;
3496         }
3497         close $fd;
3498
3499         return wantarray ? @cos : \@cos;
3500 }
3501
3502 # parse line of git-diff-tree "raw" output
3503 sub parse_difftree_raw_line {
3504         my $line = shift;
3505         my %res;
3506
3507         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3508         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3509         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3510                 $res{'from_mode'} = $1;
3511                 $res{'to_mode'} = $2;
3512                 $res{'from_id'} = $3;
3513                 $res{'to_id'} = $4;
3514                 $res{'status'} = $5;
3515                 $res{'similarity'} = $6;
3516                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3517                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3518                 } else {
3519                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3520                 }
3521         }
3522         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3523         # combined diff (for merge commit)
3524         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3525                 $res{'nparents'}  = length($1);
3526                 $res{'from_mode'} = [ split(' ', $2) ];
3527                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3528                 $res{'from_id'} = [ split(' ', $3) ];
3529                 $res{'to_id'} = pop @{$res{'from_id'}};
3530                 $res{'status'} = [ split('', $4) ];
3531                 $res{'to_file'} = unquote($5);
3532         }
3533         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3534         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3535                 $res{'commit'} = $1;
3536         }
3537
3538         return wantarray ? %res : \%res;
3539 }
3540
3541 # wrapper: return parsed line of git-diff-tree "raw" output
3542 # (the argument might be raw line, or parsed info)
3543 sub parsed_difftree_line {
3544         my $line_or_ref = shift;
3545
3546         if (ref($line_or_ref) eq "HASH") {
3547                 # pre-parsed (or generated by hand)
3548                 return $line_or_ref;
3549         } else {
3550                 return parse_difftree_raw_line($line_or_ref);
3551         }
3552 }
3553
3554 # parse line of git-ls-tree output
3555 sub parse_ls_tree_line {
3556         my $line = shift;
3557         my %opts = @_;
3558         my %res;
3559
3560         if ($opts{'-l'}) {
3561                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3562                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3563
3564                 $res{'mode'} = $1;
3565                 $res{'type'} = $2;
3566                 $res{'hash'} = $3;
3567                 $res{'size'} = $4;
3568                 if ($opts{'-z'}) {
3569                         $res{'name'} = $5;
3570                 } else {
3571                         $res{'name'} = unquote($5);
3572                 }
3573         } else {
3574                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3575                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3576
3577                 $res{'mode'} = $1;
3578                 $res{'type'} = $2;
3579                 $res{'hash'} = $3;
3580                 if ($opts{'-z'}) {
3581                         $res{'name'} = $4;
3582                 } else {
3583                         $res{'name'} = unquote($4);
3584                 }
3585         }
3586
3587         return wantarray ? %res : \%res;
3588 }
3589
3590 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3591 sub parse_from_to_diffinfo {
3592         my ($diffinfo, $from, $to, @parents) = @_;
3593
3594         if ($diffinfo->{'nparents'}) {
3595                 # combined diff
3596                 $from->{'file'} = [];
3597                 $from->{'href'} = [];
3598                 fill_from_file_info($diffinfo, @parents)
3599                         unless exists $diffinfo->{'from_file'};
3600                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3601                         $from->{'file'}[$i] =
3602                                 defined $diffinfo->{'from_file'}[$i] ?
3603                                         $diffinfo->{'from_file'}[$i] :
3604                                         $diffinfo->{'to_file'};
3605                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3606                                 $from->{'href'}[$i] = href(action=>"blob",
3607                                                            hash_base=>$parents[$i],
3608                                                            hash=>$diffinfo->{'from_id'}[$i],
3609                                                            file_name=>$from->{'file'}[$i]);
3610                         } else {
3611                                 $from->{'href'}[$i] = undef;
3612                         }
3613                 }
3614         } else {
3615                 # ordinary (not combined) diff
3616                 $from->{'file'} = $diffinfo->{'from_file'};
3617                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3618                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3619                                                hash=>$diffinfo->{'from_id'},
3620                                                file_name=>$from->{'file'});
3621                 } else {
3622                         delete $from->{'href'};
3623                 }
3624         }
3625
3626         $to->{'file'} = $diffinfo->{'to_file'};
3627         if (!is_deleted($diffinfo)) { # file exists in result
3628                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3629                                      hash=>$diffinfo->{'to_id'},
3630                                      file_name=>$to->{'file'});
3631         } else {
3632                 delete $to->{'href'};
3633         }
3634 }
3635
3636 ## ......................................................................
3637 ## parse to array of hashes functions
3638
3639 sub git_get_heads_list {
3640         my ($limit, @classes) = @_;
3641         @classes = ('heads') unless @classes;
3642         my @patterns = map { "refs/$_" } @classes;
3643         my @headslist;
3644
3645         open my $fd, '-|', git_cmd(), 'for-each-ref',
3646                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3647                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3648                 @patterns
3649                 or return;
3650         while (my $line = <$fd>) {
3651                 my %ref_item;
3652
3653                 chomp $line;
3654                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3655                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3656                 my ($committer, $epoch, $tz) =
3657                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3658                 $ref_item{'fullname'}  = $name;
3659                 $name =~ s!^refs/(?:head|remote)s/!!;
3660
3661                 $ref_item{'name'}  = $name;
3662                 $ref_item{'id'}    = $hash;
3663                 $ref_item{'title'} = $title || '(no commit message)';
3664                 $ref_item{'epoch'} = $epoch;
3665                 if ($epoch) {
3666                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3667                 } else {
3668                         $ref_item{'age'} = "unknown";
3669                 }
3670
3671                 push @headslist, \%ref_item;
3672         }
3673         close $fd;
3674
3675         return wantarray ? @headslist : \@headslist;
3676 }
3677
3678 sub git_get_tags_list {
3679         my $limit = shift;
3680         my @tagslist;
3681
3682         open my $fd, '-|', git_cmd(), 'for-each-ref',
3683                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3684                 '--format=%(objectname) %(objecttype) %(refname) '.
3685                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3686                 'refs/tags'
3687                 or return;
3688         while (my $line = <$fd>) {
3689                 my %ref_item;
3690
3691                 chomp $line;
3692                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3693                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3694                 my ($creator, $epoch, $tz) =
3695                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3696                 $ref_item{'fullname'} = $name;
3697                 $name =~ s!^refs/tags/!!;
3698
3699                 $ref_item{'type'} = $type;
3700                 $ref_item{'id'} = $id;
3701                 $ref_item{'name'} = $name;
3702                 if ($type eq "tag") {
3703                         $ref_item{'subject'} = $title;
3704                         $ref_item{'reftype'} = $reftype;
3705                         $ref_item{'refid'}   = $refid;
3706                 } else {
3707                         $ref_item{'reftype'} = $type;
3708                         $ref_item{'refid'}   = $id;
3709                 }
3710
3711                 if ($type eq "tag" || $type eq "commit") {
3712                         $ref_item{'epoch'} = $epoch;
3713                         if ($epoch) {
3714                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3715                         } else {
3716                                 $ref_item{'age'} = "unknown";
3717                         }
3718                 }
3719
3720                 push @tagslist, \%ref_item;
3721         }
3722         close $fd;
3723
3724         return wantarray ? @tagslist : \@tagslist;
3725 }
3726
3727 ## ----------------------------------------------------------------------
3728 ## filesystem-related functions
3729
3730 sub get_file_owner {
3731         my $path = shift;
3732
3733         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3734         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3735         if (!defined $gcos) {
3736                 return undef;
3737         }
3738         my $owner = $gcos;
3739         $owner =~ s/[,;].*$//;
3740         return to_utf8($owner);
3741 }
3742
3743 # assume that file exists
3744 sub insert_file {
3745         my $filename = shift;
3746
3747         open my $fd, '<', $filename;
3748         print map { to_utf8($_) } <$fd>;
3749         close $fd;
3750 }
3751
3752 ## ......................................................................
3753 ## mimetype related functions
3754
3755 sub mimetype_guess_file {
3756         my $filename = shift;
3757         my $mimemap = shift;
3758         -r $mimemap or return undef;
3759
3760         my %mimemap;
3761         open(my $mh, '<', $mimemap) or return undef;
3762         while (<$mh>) {
3763                 next if m/^#/; # skip comments
3764                 my ($mimetype, @exts) = split(/\s+/);
3765                 foreach my $ext (@exts) {
3766                         $mimemap{$ext} = $mimetype;
3767                 }
3768         }
3769         close($mh);
3770
3771         $filename =~ /\.([^.]*)$/;
3772         return $mimemap{$1};
3773 }
3774
3775 sub mimetype_guess {
3776         my $filename = shift;
3777         my $mime;
3778         $filename =~ /\./ or return undef;
3779
3780         if ($mimetypes_file) {
3781                 my $file = $mimetypes_file;
3782                 if ($file !~ m!^/!) { # if it is relative path
3783                         # it is relative to project
3784                         $file = "$projectroot/$project/$file";
3785                 }
3786                 $mime = mimetype_guess_file($filename, $file);
3787         }
3788         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3789         return $mime;
3790 }
3791
3792 sub blob_mimetype {
3793         my $fd = shift;
3794         my $filename = shift;
3795
3796         if ($filename) {
3797                 my $mime = mimetype_guess($filename);
3798                 $mime and return $mime;
3799         }
3800
3801         # just in case
3802         return $default_blob_plain_mimetype unless $fd;
3803
3804         if (-T $fd) {
3805                 return 'text/plain';
3806         } elsif (! $filename) {
3807                 return 'application/octet-stream';
3808         } elsif ($filename =~ m/\.png$/i) {
3809                 return 'image/png';
3810         } elsif ($filename =~ m/\.gif$/i) {
3811                 return 'image/gif';
3812         } elsif ($filename =~ m/\.jpe?g$/i) {
3813                 return 'image/jpeg';
3814         } else {
3815                 return 'application/octet-stream';
3816         }
3817 }
3818
3819 sub blob_contenttype {
3820         my ($fd, $file_name, $type) = @_;
3821
3822         $type ||= blob_mimetype($fd, $file_name);
3823         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3824                 $type .= "; charset=$default_text_plain_charset";
3825         }
3826
3827         return $type;
3828 }
3829
3830 # guess file syntax for syntax highlighting; return undef if no highlighting
3831 # the name of syntax can (in the future) depend on syntax highlighter used
3832 sub guess_file_syntax {
3833         my ($highlight, $mimetype, $file_name) = @_;
3834         return undef unless ($highlight && defined $file_name);
3835         my $basename = basename($file_name, '.in');
3836         return $highlight_basename{$basename}
3837                 if exists $highlight_basename{$basename};
3838
3839         $basename =~ /\.([^.]*)$/;
3840         my $ext = $1 or return undef;
3841         return $highlight_ext{$ext}
3842                 if exists $highlight_ext{$ext};
3843
3844         return undef;
3845 }
3846
3847 # run highlighter and return FD of its output,
3848 # or return original FD if no highlighting
3849 sub run_highlighter {
3850         my ($fd, $highlight, $syntax) = @_;
3851         return $fd unless ($highlight && defined $syntax);
3852
3853         close $fd;
3854         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3855                   quote_command($highlight_bin).
3856                   " --replace-tabs=8 --fragment --syntax $syntax |"
3857                 or die_error(500, "Couldn't open file or run syntax highlighter");
3858         return $fd;
3859 }
3860
3861 ## ======================================================================
3862 ## functions printing HTML: header, footer, error page
3863
3864 sub get_page_title {
3865         my $title = to_utf8($site_name);
3866
3867         unless (defined $project) {
3868                 if (defined $project_filter) {
3869                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3870                 }
3871                 return $title;
3872         }
3873         $title .= " - " . to_utf8($project);
3874
3875         return $title unless (defined $action);
3876         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3877
3878         return $title unless (defined $file_name);
3879         $title .= " - " . esc_path($file_name);
3880         if ($action eq "tree" && $file_name !~ m|/$|) {
3881                 $title .= "/";
3882         }
3883
3884         return $title;
3885 }
3886
3887 sub get_content_type_html {
3888         # require explicit support from the UA if we are to send the page as
3889         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3890         # we have to do this because MSIE sometimes globs '*/*', pretending to
3891         # support xhtml+xml but choking when it gets what it asked for.
3892         if (defined $cgi->http('HTTP_ACCEPT') &&
3893             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3894             $cgi->Accept('application/xhtml+xml') != 0) {
3895                 return 'application/xhtml+xml';
3896         } else {
3897                 return 'text/html';
3898         }
3899 }
3900
3901 sub print_feed_meta {
3902         if (defined $project) {
3903                 my %href_params = get_feed_info();
3904                 if (!exists $href_params{'-title'}) {
3905                         $href_params{'-title'} = 'log';
3906                 }
3907
3908                 foreach my $format (qw(RSS Atom)) {
3909                         my $type = lc($format);
3910                         my %link_attr = (
3911                                 '-rel' => 'alternate',
3912                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3913                                 '-type' => "application/$type+xml"
3914                         );
3915
3916                         $href_params{'extra_options'} = undef;
3917                         $href_params{'action'} = $type;
3918                         $link_attr{'-href'} = href(%href_params);
3919                         print "<link ".
3920                               "rel=\"$link_attr{'-rel'}\" ".
3921                               "title=\"$link_attr{'-title'}\" ".
3922                               "href=\"$link_attr{'-href'}\" ".
3923                               "type=\"$link_attr{'-type'}\" ".
3924                               "/>\n";
3925
3926                         $href_params{'extra_options'} = '--no-merges';
3927                         $link_attr{'-href'} = href(%href_params);
3928                         $link_attr{'-title'} .= ' (no merges)';
3929                         print "<link ".
3930                               "rel=\"$link_attr{'-rel'}\" ".
3931                               "title=\"$link_attr{'-title'}\" ".
3932                               "href=\"$link_attr{'-href'}\" ".
3933                               "type=\"$link_attr{'-type'}\" ".
3934                               "/>\n";
3935                 }
3936
3937         } else {
3938                 printf('<link rel="alternate" title="%s projects list" '.
3939                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3940                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3941                 printf('<link rel="alternate" title="%s projects feeds" '.
3942                        'href="%s" type="text/x-opml" />'."\n",
3943                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3944         }
3945 }
3946
3947 sub print_header_links {
3948         my $status = shift;
3949
3950         # print out each stylesheet that exist, providing backwards capability
3951         # for those people who defined $stylesheet in a config file
3952         if (defined $stylesheet) {
3953                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3954         } else {
3955                 foreach my $stylesheet (@stylesheets) {
3956                         next unless $stylesheet;
3957                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3958                 }
3959         }
3960         print_feed_meta()
3961                 if ($status eq '200 OK');
3962         if (defined $favicon) {
3963                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3964         }
3965 }
3966
3967 sub print_nav_breadcrumbs_path {
3968         my $dirprefix = undef;
3969         while (my $part = shift) {
3970                 $dirprefix .= "/" if defined $dirprefix;
3971                 $dirprefix .= $part;
3972                 print $cgi->a({-href => href(project => undef,
3973                                              project_filter => $dirprefix,
3974                                              action => "project_list")},
3975                               esc_html($part)) . " / ";
3976         }
3977 }
3978
3979 sub print_nav_breadcrumbs {
3980         my %opts = @_;
3981
3982         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3983         if (defined $project) {
3984                 my @dirname = split '/', $project;
3985                 my $projectbasename = pop @dirname;
3986                 print_nav_breadcrumbs_path(@dirname);
3987                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3988                 if (defined $action) {
3989                         my $action_print = $action ;
3990                         if (defined $opts{-action_extra}) {
3991                                 $action_print = $cgi->a({-href => href(action=>$action)},
3992                                         $action);
3993                         }
3994                         print " / $action_print";
3995                 }
3996                 if (defined $opts{-action_extra}) {
3997                         print " / $opts{-action_extra}";
3998                 }
3999                 print "\n";
4000         } elsif (defined $project_filter) {
4001                 print_nav_breadcrumbs_path(split '/', $project_filter);
4002         }
4003 }
4004
4005 sub print_search_form {
4006         if (!defined $searchtext) {
4007                 $searchtext = "";
4008         }
4009         my $search_hash;
4010         if (defined $hash_base) {
4011                 $search_hash = $hash_base;
4012         } elsif (defined $hash) {
4013                 $search_hash = $hash;
4014         } else {
4015                 $search_hash = "HEAD";
4016         }
4017         my $action = $my_uri;
4018         my $use_pathinfo = gitweb_check_feature('pathinfo');
4019         if ($use_pathinfo) {
4020                 $action .= "/".esc_url($project);
4021         }
4022         print $cgi->startform(-method => "get", -action => $action) .
4023               "<div class=\"search\">\n" .
4024               (!$use_pathinfo &&
4025               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4026               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4027               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4028               $cgi->popup_menu(-name => 'st', -default => 'commit',
4029                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4030               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4031               " search:\n",
4032               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4033               "<span title=\"Extended regular expression\">" .
4034               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4035                              -checked => $search_use_regexp) .
4036               "</span>" .
4037               "</div>" .
4038               $cgi->end_form() . "\n";
4039 }
4040
4041 sub git_header_html {
4042         my $status = shift || "200 OK";
4043         my $expires = shift;
4044         my %opts = @_;
4045
4046         my $title = get_page_title();
4047         my $content_type = get_content_type_html();
4048         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4049                            -status=> $status, -expires => $expires)
4050                 unless ($opts{'-no_http_header'});
4051         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4052         print <<EOF;
4053 <?xml version="1.0" encoding="utf-8"?>
4054 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4055 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4056 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4057 <!-- git core binaries version $git_version -->
4058 <head>
4059 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4060 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4061 <meta name="robots" content="index, nofollow"/>
4062 <title>$title</title>
4063 EOF
4064         # the stylesheet, favicon etc urls won't work correctly with path_info
4065         # unless we set the appropriate base URL
4066         if ($ENV{'PATH_INFO'}) {
4067                 print "<base href=\"".esc_url($base_url)."\" />\n";
4068         }
4069         print_header_links($status);
4070
4071         if (defined $site_html_head_string) {
4072                 print to_utf8($site_html_head_string);
4073         }
4074
4075         print "</head>\n" .
4076               "<body>\n";
4077
4078         if (defined $site_header && -f $site_header) {
4079                 insert_file($site_header);
4080         }
4081
4082         print "<div class=\"page_header\">\n";
4083         if (defined $logo) {
4084                 print $cgi->a({-href => esc_url($logo_url),
4085                                -title => $logo_label},
4086                               $cgi->img({-src => esc_url($logo),
4087                                          -width => 72, -height => 27,
4088                                          -alt => "git",
4089                                          -class => "logo"}));
4090         }
4091         print_nav_breadcrumbs(%opts);
4092         print "</div>\n";
4093
4094         my $have_search = gitweb_check_feature('search');
4095         if (defined $project && $have_search) {
4096                 print_search_form();
4097         }
4098 }
4099
4100 sub git_footer_html {
4101         my $feed_class = 'rss_logo';
4102
4103         print "<div class=\"page_footer\">\n";
4104         if (defined $project) {
4105                 my $descr = git_get_project_description($project);
4106                 if (defined $descr) {
4107                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4108                 }
4109
4110                 my %href_params = get_feed_info();
4111                 if (!%href_params) {
4112                         $feed_class .= ' generic';
4113                 }
4114                 $href_params{'-title'} ||= 'log';
4115
4116                 foreach my $format (qw(RSS Atom)) {
4117                         $href_params{'action'} = lc($format);
4118                         print $cgi->a({-href => href(%href_params),
4119                                       -title => "$href_params{'-title'} $format feed",
4120                                       -class => $feed_class}, $format)."\n";
4121                 }
4122
4123         } else {
4124                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4125                                              project_filter => $project_filter),
4126                               -class => $feed_class}, "OPML") . " ";
4127                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4128                                              project_filter => $project_filter),
4129                               -class => $feed_class}, "TXT") . "\n";
4130         }
4131         print "</div>\n"; # class="page_footer"
4132
4133         if (defined $t0 && gitweb_check_feature('timed')) {
4134                 print "<div id=\"generating_info\">\n";
4135                 print 'This page took '.
4136                       '<span id="generating_time" class="time_span">'.
4137                       tv_interval($t0, [ gettimeofday() ]).
4138                       ' seconds </span>'.
4139                       ' and '.
4140                       '<span id="generating_cmd">'.
4141                       $number_of_git_cmds.
4142                       '</span> git commands '.
4143                       " to generate.\n";
4144                 print "</div>\n"; # class="page_footer"
4145         }
4146
4147         if (defined $site_footer && -f $site_footer) {
4148                 insert_file($site_footer);
4149         }
4150
4151         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4152         if (defined $action &&
4153             $action eq 'blame_incremental') {
4154                 print qq!<script type="text/javascript">\n!.
4155                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4156                       qq!           "!. href() .qq!");\n!.
4157                       qq!</script>\n!;
4158         } else {
4159                 my ($jstimezone, $tz_cookie, $datetime_class) =
4160                         gitweb_get_feature('javascript-timezone');
4161
4162                 print qq!<script type="text/javascript">\n!.
4163                       qq!window.onload = function () {\n!;
4164                 if (gitweb_check_feature('javascript-actions')) {
4165                         print qq!       fixLinks();\n!;
4166                 }
4167                 if ($jstimezone && $tz_cookie && $datetime_class) {
4168                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4169                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4170                 }
4171                 print qq!};\n!.
4172                       qq!</script>\n!;
4173         }
4174
4175         print "</body>\n" .
4176               "</html>";
4177 }
4178
4179 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4180 # Example: die_error(404, 'Hash not found')
4181 # By convention, use the following status codes (as defined in RFC 2616):
4182 # 400: Invalid or missing CGI parameters, or
4183 #      requested object exists but has wrong type.
4184 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4185 #      this server or project.
4186 # 404: Requested object/revision/project doesn't exist.
4187 # 500: The server isn't configured properly, or
4188 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4189 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4190 # 503: The server is currently unavailable (because it is overloaded,
4191 #      or down for maintenance).  Generally, this is a temporary state.
4192 sub die_error {
4193         my $status = shift || 500;
4194         my $error = esc_html(shift) || "Internal Server Error";
4195         my $extra = shift;
4196         my %opts = @_;
4197
4198         my %http_responses = (
4199                 400 => '400 Bad Request',
4200                 403 => '403 Forbidden',
4201                 404 => '404 Not Found',
4202                 500 => '500 Internal Server Error',
4203                 503 => '503 Service Unavailable',
4204         );
4205         git_header_html($http_responses{$status}, undef, %opts);
4206         print <<EOF;
4207 <div class="page_body">
4208 <br /><br />
4209 $status - $error
4210 <br />
4211 EOF
4212         if (defined $extra) {
4213                 print "<hr />\n" .
4214                       "$extra\n";
4215         }
4216         print "</div>\n";
4217
4218         git_footer_html();
4219         goto DONE_GITWEB
4220                 unless ($opts{'-error_handler'});
4221 }
4222
4223 ## ----------------------------------------------------------------------
4224 ## functions printing or outputting HTML: navigation
4225
4226 sub git_print_page_nav {
4227         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4228         $extra = '' if !defined $extra; # pager or formats
4229
4230         my @navs = qw(summary shortlog log commit commitdiff tree);
4231         if ($suppress) {
4232                 @navs = grep { $_ ne $suppress } @navs;
4233         }
4234
4235         my %arg = map { $_ => {action=>$_} } @navs;
4236         if (defined $head) {
4237                 for (qw(commit commitdiff)) {
4238                         $arg{$_}{'hash'} = $head;
4239                 }
4240                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4241                         for (qw(shortlog log)) {
4242                                 $arg{$_}{'hash'} = $head;
4243                         }
4244                 }
4245         }
4246
4247         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4248         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4249
4250         my @actions = gitweb_get_feature('actions');
4251         my %repl = (
4252                 '%' => '%',
4253                 'n' => $project,         # project name
4254                 'f' => $git_dir,         # project path within filesystem
4255                 'h' => $treehead || '',  # current hash ('h' parameter)
4256                 'b' => $treebase || '',  # hash base ('hb' parameter)
4257         );
4258         while (@actions) {
4259                 my ($label, $link, $pos) = splice(@actions,0,3);
4260                 # insert
4261                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4262                 # munch munch
4263                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4264                 $arg{$label}{'_href'} = $link;
4265         }
4266
4267         print "<div class=\"page_nav\">\n" .
4268                 (join " | ",
4269                  map { $_ eq $current ?
4270                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4271                  } @navs);
4272         print "<br/>\n$extra<br/>\n" .
4273               "</div>\n";
4274 }
4275
4276 # returns a submenu for the nagivation of the refs views (tags, heads,
4277 # remotes) with the current view disabled and the remotes view only
4278 # available if the feature is enabled
4279 sub format_ref_views {
4280         my ($current) = @_;
4281         my @ref_views = qw{tags heads};
4282         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4283         return join " | ", map {
4284                 $_ eq $current ? $_ :
4285                 $cgi->a({-href => href(action=>$_)}, $_)
4286         } @ref_views
4287 }
4288
4289 sub format_paging_nav {
4290         my ($action, $page, $has_next_link) = @_;
4291         my $paging_nav;
4292
4293
4294         if ($page > 0) {
4295                 $paging_nav .=
4296                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4297                         " &sdot; " .
4298                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4299                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4300         } else {
4301                 $paging_nav .= "first &sdot; prev";
4302         }
4303
4304         if ($has_next_link) {
4305                 $paging_nav .= " &sdot; " .
4306                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4307                                  -accesskey => "n", -title => "Alt-n"}, "next");
4308         } else {
4309                 $paging_nav .= " &sdot; next";
4310         }
4311
4312         return $paging_nav;
4313 }
4314
4315 ## ......................................................................
4316 ## functions printing or outputting HTML: div
4317
4318 sub git_print_header_div {
4319         my ($action, $title, $hash, $hash_base) = @_;
4320         my %args = ();
4321
4322         $args{'action'} = $action;
4323         $args{'hash'} = $hash if $hash;
4324         $args{'hash_base'} = $hash_base if $hash_base;
4325
4326         print "<div class=\"header\">\n" .
4327               $cgi->a({-href => href(%args), -class => "title"},
4328               $title ? $title : $action) .
4329               "\n</div>\n";
4330 }
4331
4332 sub format_repo_url {
4333         my ($name, $url) = @_;
4334         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4335 }
4336
4337 # Group output by placing it in a DIV element and adding a header.
4338 # Options for start_div() can be provided by passing a hash reference as the
4339 # first parameter to the function.
4340 # Options to git_print_header_div() can be provided by passing an array
4341 # reference. This must follow the options to start_div if they are present.
4342 # The content can be a scalar, which is output as-is, a scalar reference, which
4343 # is output after html escaping, an IO handle passed either as *handle or
4344 # *handle{IO}, or a function reference. In the latter case all following
4345 # parameters will be taken as argument to the content function call.
4346 sub git_print_section {
4347         my ($div_args, $header_args, $content);
4348         my $arg = shift;
4349         if (ref($arg) eq 'HASH') {
4350                 $div_args = $arg;
4351                 $arg = shift;
4352         }
4353         if (ref($arg) eq 'ARRAY') {
4354                 $header_args = $arg;
4355                 $arg = shift;
4356         }
4357         $content = $arg;
4358
4359         print $cgi->start_div($div_args);
4360         git_print_header_div(@$header_args);
4361
4362         if (ref($content) eq 'CODE') {
4363                 $content->(@_);
4364         } elsif (ref($content) eq 'SCALAR') {
4365                 print esc_html($$content);
4366         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4367                 print <$content>;
4368         } elsif (!ref($content) && defined($content)) {
4369                 print $content;
4370         }
4371
4372         print $cgi->end_div;
4373 }
4374
4375 sub format_timestamp_html {
4376         my $date = shift;
4377         my $strtime = $date->{'rfc2822'};
4378
4379         my (undef, undef, $datetime_class) =
4380                 gitweb_get_feature('javascript-timezone');
4381         if ($datetime_class) {
4382                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4383         }
4384
4385         my $localtime_format = '(%02d:%02d %s)';
4386         if ($date->{'hour_local'} < 6) {
4387                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4388         }
4389         $strtime .= ' ' .
4390                     sprintf($localtime_format,
4391                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4392
4393         return $strtime;
4394 }
4395
4396 # Outputs the author name and date in long form
4397 sub git_print_authorship {
4398         my $co = shift;
4399         my %opts = @_;
4400         my $tag = $opts{-tag} || 'div';
4401         my $author = $co->{'author_name'};
4402
4403         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4404         print "<$tag class=\"author_date\">" .
4405               format_search_author($author, "author", esc_html($author)) .
4406               " [".format_timestamp_html(\%ad)."]".
4407               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4408               "</$tag>\n";
4409 }
4410
4411 # Outputs table rows containing the full author or committer information,
4412 # in the format expected for 'commit' view (& similar).
4413 # Parameters are a commit hash reference, followed by the list of people
4414 # to output information for. If the list is empty it defaults to both
4415 # author and committer.
4416 sub git_print_authorship_rows {
4417         my $co = shift;
4418         # too bad we can't use @people = @_ || ('author', 'committer')
4419         my @people = @_;
4420         @people = ('author', 'committer') unless @people;
4421         foreach my $who (@people) {
4422                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4423                 print "<tr><td>$who</td><td>" .
4424                       format_search_author($co->{"${who}_name"}, $who,
4425                                            esc_html($co->{"${who}_name"})) . " " .
4426                       format_search_author($co->{"${who}_email"}, $who,
4427                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4428                       "</td><td rowspan=\"2\">" .
4429                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4430                       "</td></tr>\n" .
4431                       "<tr>" .
4432                       "<td></td><td>" .
4433                       format_timestamp_html(\%wd) .
4434                       "</td>" .
4435                       "</tr>\n";
4436         }
4437 }
4438
4439 sub git_print_page_path {
4440         my $name = shift;
4441         my $type = shift;
4442         my $hb = shift;
4443
4444
4445         print "<div class=\"page_path\">";
4446         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4447                       -title => 'tree root'}, to_utf8("[$project]"));
4448         print " / ";
4449         if (defined $name) {
4450                 my @dirname = split '/', $name;
4451                 my $basename = pop @dirname;
4452                 my $fullname = '';
4453
4454                 foreach my $dir (@dirname) {
4455                         $fullname .= ($fullname ? '/' : '') . $dir;
4456                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4457                                                      hash_base=>$hb),
4458                                       -title => $fullname}, esc_path($dir));
4459                         print " / ";
4460                 }
4461                 if (defined $type && $type eq 'blob') {
4462                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4463                                                      hash_base=>$hb),
4464                                       -title => $name}, esc_path($basename));
4465                 } elsif (defined $type && $type eq 'tree') {
4466                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4467                                                      hash_base=>$hb),
4468                                       -title => $name}, esc_path($basename));
4469                         print " / ";
4470                 } else {
4471                         print esc_path($basename);
4472                 }
4473         }
4474         print "<br/></div>\n";
4475 }
4476
4477 sub git_print_log {
4478         my $log = shift;
4479         my %opts = @_;
4480
4481         if ($opts{'-remove_title'}) {
4482                 # remove title, i.e. first line of log
4483                 shift @$log;
4484         }
4485         # remove leading empty lines
4486         while (defined $log->[0] && $log->[0] eq "") {
4487                 shift @$log;
4488         }
4489
4490         # print log
4491         my $skip_blank_line = 0;
4492         foreach my $line (@$log) {
4493                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4494                         if (! $opts{'-remove_signoff'}) {
4495                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4496                                 $skip_blank_line = 1;
4497                         }
4498                         next;
4499                 }
4500
4501                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4502                         if (! $opts{'-remove_signoff'}) {
4503                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4504                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4505                                         "</span><br/>\n";
4506                                 $skip_blank_line = 1;
4507                         }
4508                         next;
4509                 }
4510
4511                 # print only one empty line
4512                 # do not print empty line after signoff
4513                 if ($line eq "") {
4514                         next if ($skip_blank_line);
4515                         $skip_blank_line = 1;
4516                 } else {
4517                         $skip_blank_line = 0;
4518                 }
4519
4520                 print format_log_line_html($line) . "<br/>\n";
4521         }
4522
4523         if ($opts{'-final_empty_line'}) {
4524                 # end with single empty line
4525                 print "<br/>\n" unless $skip_blank_line;
4526         }
4527 }
4528
4529 # return link target (what link points to)
4530 sub git_get_link_target {
4531         my $hash = shift;
4532         my $link_target;
4533
4534         # read link
4535         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4536                 or return;
4537         {
4538                 local $/ = undef;
4539                 $link_target = <$fd>;
4540         }
4541         close $fd
4542                 or return;
4543
4544         return $link_target;
4545 }
4546
4547 # given link target, and the directory (basedir) the link is in,
4548 # return target of link relative to top directory (top tree);
4549 # return undef if it is not possible (including absolute links).
4550 sub normalize_link_target {
4551         my ($link_target, $basedir) = @_;
4552
4553         # absolute symlinks (beginning with '/') cannot be normalized
4554         return if (substr($link_target, 0, 1) eq '/');
4555
4556         # normalize link target to path from top (root) tree (dir)
4557         my $path;
4558         if ($basedir) {
4559                 $path = $basedir . '/' . $link_target;
4560         } else {
4561                 # we are in top (root) tree (dir)
4562                 $path = $link_target;
4563         }
4564
4565         # remove //, /./, and /../
4566         my @path_parts;
4567         foreach my $part (split('/', $path)) {
4568                 # discard '.' and ''
4569                 next if (!$part || $part eq '.');
4570                 # handle '..'
4571                 if ($part eq '..') {
4572                         if (@path_parts) {
4573                                 pop @path_parts;
4574                         } else {
4575                                 # link leads outside repository (outside top dir)
4576                                 return;
4577                         }
4578                 } else {
4579                         push @path_parts, $part;
4580                 }
4581         }
4582         $path = join('/', @path_parts);
4583
4584         return $path;
4585 }
4586
4587 # print tree entry (row of git_tree), but without encompassing <tr> element
4588 sub git_print_tree_entry {
4589         my ($t, $basedir, $hash_base, $have_blame) = @_;
4590
4591         my %base_key = ();
4592         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4593
4594         # The format of a table row is: mode list link.  Where mode is
4595         # the mode of the entry, list is the name of the entry, an href,
4596         # and link is the action links of the entry.
4597
4598         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4599         if (exists $t->{'size'}) {
4600                 print "<td class=\"size\">$t->{'size'}</td>\n";
4601         }
4602         if ($t->{'type'} eq "blob") {
4603                 print "<td class=\"list\">" .
4604                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4605                                                file_name=>"$basedir$t->{'name'}", %base_key),
4606                                 -class => "list"}, esc_path($t->{'name'}));
4607                 if (S_ISLNK(oct $t->{'mode'})) {
4608                         my $link_target = git_get_link_target($t->{'hash'});
4609                         if ($link_target) {
4610                                 my $norm_target = normalize_link_target($link_target, $basedir);
4611                                 if (defined $norm_target) {
4612                                         print " -> " .
4613                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4614                                                                      file_name=>$norm_target),
4615                                                        -title => $norm_target}, esc_path($link_target));
4616                                 } else {
4617                                         print " -> " . esc_path($link_target);
4618                                 }
4619                         }
4620                 }
4621                 print "</td>\n";
4622                 print "<td class=\"link\">";
4623                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4624                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4625                               "blob");
4626                 if ($have_blame) {
4627                         print " | " .
4628                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4629                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4630                                       "blame");
4631                 }
4632                 if (defined $hash_base) {
4633                         print " | " .
4634                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4635                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4636                                       "history");
4637                 }
4638                 print " | " .
4639                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4640                                                file_name=>"$basedir$t->{'name'}")},
4641                                 "raw");
4642                 print "</td>\n";
4643
4644         } elsif ($t->{'type'} eq "tree") {
4645                 print "<td class=\"list\">";
4646                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4647                                              file_name=>"$basedir$t->{'name'}",
4648                                              %base_key)},
4649                               esc_path($t->{'name'}));
4650                 print "</td>\n";
4651                 print "<td class=\"link\">";
4652                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4653                                              file_name=>"$basedir$t->{'name'}",
4654                                              %base_key)},
4655                               "tree");
4656                 if (defined $hash_base) {
4657                         print " | " .
4658                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4659                                                      file_name=>"$basedir$t->{'name'}")},
4660                                       "history");
4661                 }
4662                 print "</td>\n";
4663         } else {
4664                 # unknown object: we can only present history for it
4665                 # (this includes 'commit' object, i.e. submodule support)
4666                 print "<td class=\"list\">" .
4667                       esc_path($t->{'name'}) .
4668                       "</td>\n";
4669                 print "<td class=\"link\">";
4670                 if (defined $hash_base) {
4671                         print $cgi->a({-href => href(action=>"history",
4672                                                      hash_base=>$hash_base,
4673                                                      file_name=>"$basedir$t->{'name'}")},
4674                                       "history");
4675                 }
4676                 print "</td>\n";
4677         }
4678 }
4679
4680 ## ......................................................................
4681 ## functions printing large fragments of HTML
4682
4683 # get pre-image filenames for merge (combined) diff
4684 sub fill_from_file_info {
4685         my ($diff, @parents) = @_;
4686
4687         $diff->{'from_file'} = [ ];
4688         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4689         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4690                 if ($diff->{'status'}[$i] eq 'R' ||
4691                     $diff->{'status'}[$i] eq 'C') {
4692                         $diff->{'from_file'}[$i] =
4693                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4694                 }
4695         }
4696
4697         return $diff;
4698 }
4699
4700 # is current raw difftree line of file deletion
4701 sub is_deleted {
4702         my $diffinfo = shift;
4703
4704         return $diffinfo->{'to_id'} eq ('0' x 40);
4705 }
4706
4707 # does patch correspond to [previous] difftree raw line
4708 # $diffinfo  - hashref of parsed raw diff format
4709 # $patchinfo - hashref of parsed patch diff format
4710 #              (the same keys as in $diffinfo)
4711 sub is_patch_split {
4712         my ($diffinfo, $patchinfo) = @_;
4713
4714         return defined $diffinfo && defined $patchinfo
4715                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4716 }
4717
4718
4719 sub git_difftree_body {
4720         my ($difftree, $hash, @parents) = @_;
4721         my ($parent) = $parents[0];
4722         my $have_blame = gitweb_check_feature('blame');
4723         print "<div class=\"list_head\">\n";
4724         if ($#{$difftree} > 10) {
4725                 print(($#{$difftree} + 1) . " files changed:\n");
4726         }
4727         print "</div>\n";
4728
4729         print "<table class=\"" .
4730               (@parents > 1 ? "combined " : "") .
4731               "diff_tree\">\n";
4732
4733         # header only for combined diff in 'commitdiff' view
4734         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4735         if ($has_header) {
4736                 # table header
4737                 print "<thead><tr>\n" .
4738                        "<th></th><th></th>\n"; # filename, patchN link
4739                 for (my $i = 0; $i < @parents; $i++) {
4740                         my $par = $parents[$i];
4741                         print "<th>" .
4742                               $cgi->a({-href => href(action=>"commitdiff",
4743                                                      hash=>$hash, hash_parent=>$par),
4744                                        -title => 'commitdiff to parent number ' .
4745                                                   ($i+1) . ': ' . substr($par,0,7)},
4746                                       $i+1) .
4747                               "&nbsp;</th>\n";
4748                 }
4749                 print "</tr></thead>\n<tbody>\n";
4750         }
4751
4752         my $alternate = 1;
4753         my $patchno = 0;
4754         foreach my $line (@{$difftree}) {
4755                 my $diff = parsed_difftree_line($line);
4756
4757                 if ($alternate) {
4758                         print "<tr class=\"dark\">\n";
4759                 } else {
4760                         print "<tr class=\"light\">\n";
4761                 }
4762                 $alternate ^= 1;
4763
4764                 if (exists $diff->{'nparents'}) { # combined diff
4765
4766                         fill_from_file_info($diff, @parents)
4767                                 unless exists $diff->{'from_file'};
4768
4769                         if (!is_deleted($diff)) {
4770                                 # file exists in the result (child) commit
4771                                 print "<td>" .
4772                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4773                                                              file_name=>$diff->{'to_file'},
4774                                                              hash_base=>$hash),
4775                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4776                                       "</td>\n";
4777                         } else {
4778                                 print "<td>" .
4779                                       esc_path($diff->{'to_file'}) .
4780                                       "</td>\n";
4781                         }
4782
4783                         if ($action eq 'commitdiff') {
4784                                 # link to patch
4785                                 $patchno++;
4786                                 print "<td class=\"link\">" .
4787                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4788                                               "patch") .
4789                                       " | " .
4790                                       "</td>\n";
4791                         }
4792
4793                         my $has_history = 0;
4794                         my $not_deleted = 0;
4795                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4796                                 my $hash_parent = $parents[$i];
4797                                 my $from_hash = $diff->{'from_id'}[$i];
4798                                 my $from_path = $diff->{'from_file'}[$i];
4799                                 my $status = $diff->{'status'}[$i];
4800
4801                                 $has_history ||= ($status ne 'A');
4802                                 $not_deleted ||= ($status ne 'D');
4803
4804                                 if ($status eq 'A') {
4805                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4806                                 } elsif ($status eq 'D') {
4807                                         print "<td class=\"link\">" .
4808                                               $cgi->a({-href => href(action=>"blob",
4809                                                                      hash_base=>$hash,
4810                                                                      hash=>$from_hash,
4811                                                                      file_name=>$from_path)},
4812                                                       "blob" . ($i+1)) .
4813                                               " | </td>\n";
4814                                 } else {
4815                                         if ($diff->{'to_id'} eq $from_hash) {
4816                                                 print "<td class=\"link nochange\">";
4817                                         } else {
4818                                                 print "<td class=\"link\">";
4819                                         }
4820                                         print $cgi->a({-href => href(action=>"blobdiff",
4821                                                                      hash=>$diff->{'to_id'},
4822                                                                      hash_parent=>$from_hash,
4823                                                                      hash_base=>$hash,
4824                                                                      hash_parent_base=>$hash_parent,
4825                                                                      file_name=>$diff->{'to_file'},
4826                                                                      file_parent=>$from_path)},
4827                                                       "diff" . ($i+1)) .
4828                                               " | </td>\n";
4829                                 }
4830                         }
4831
4832                         print "<td class=\"link\">";
4833                         if ($not_deleted) {
4834                                 print $cgi->a({-href => href(action=>"blob",
4835                                                              hash=>$diff->{'to_id'},
4836                                                              file_name=>$diff->{'to_file'},
4837                                                              hash_base=>$hash)},
4838                                               "blob");
4839                                 print " | " if ($has_history);
4840                         }
4841                         if ($has_history) {
4842                                 print $cgi->a({-href => href(action=>"history",
4843                                                              file_name=>$diff->{'to_file'},
4844                                                              hash_base=>$hash)},
4845                                               "history");
4846                         }
4847                         print "</td>\n";
4848
4849                         print "</tr>\n";
4850                         next; # instead of 'else' clause, to avoid extra indent
4851                 }
4852                 # else ordinary diff
4853
4854                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4855                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4856                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4857                         $to_mode_oct = oct $diff->{'to_mode'};
4858                         if (S_ISREG($to_mode_oct)) { # only for regular file
4859                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4860                         }
4861                         $to_file_type = file_type($diff->{'to_mode'});
4862                 }
4863                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4864                         $from_mode_oct = oct $diff->{'from_mode'};
4865                         if (S_ISREG($from_mode_oct)) { # only for regular file
4866                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4867                         }
4868                         $from_file_type = file_type($diff->{'from_mode'});
4869                 }
4870
4871                 if ($diff->{'status'} eq "A") { # created
4872                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4873                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4874                         $mode_chng   .= "]</span>";
4875                         print "<td>";
4876                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4877                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4878                                       -class => "list"}, esc_path($diff->{'file'}));
4879                         print "</td>\n";
4880                         print "<td>$mode_chng</td>\n";
4881                         print "<td class=\"link\">";
4882                         if ($action eq 'commitdiff') {
4883                                 # link to patch
4884                                 $patchno++;
4885                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4886                                               "patch") .
4887                                       " | ";
4888                         }
4889                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4890                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4891                                       "blob");
4892                         print "</td>\n";
4893
4894                 } elsif ($diff->{'status'} eq "D") { # deleted
4895                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4896                         print "<td>";
4897                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4898                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4899                                        -class => "list"}, esc_path($diff->{'file'}));
4900                         print "</td>\n";
4901                         print "<td>$mode_chng</td>\n";
4902                         print "<td class=\"link\">";
4903                         if ($action eq 'commitdiff') {
4904                                 # link to patch
4905                                 $patchno++;
4906                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4907                                               "patch") .
4908                                       " | ";
4909                         }
4910                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4911                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4912                                       "blob") . " | ";
4913                         if ($have_blame) {
4914                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4915                                                              file_name=>$diff->{'file'})},
4916                                               "blame") . " | ";
4917                         }
4918                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4919                                                      file_name=>$diff->{'file'})},
4920                                       "history");
4921                         print "</td>\n";
4922
4923                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4924                         my $mode_chnge = "";
4925                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4926                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4927                                 if ($from_file_type ne $to_file_type) {
4928                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4929                                 }
4930                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4931                                         if ($from_mode_str && $to_mode_str) {
4932                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4933                                         } elsif ($to_mode_str) {
4934                                                 $mode_chnge .= " mode: $to_mode_str";
4935                                         }
4936                                 }
4937                                 $mode_chnge .= "]</span>\n";
4938                         }
4939                         print "<td>";
4940                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4941                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4942                                       -class => "list"}, esc_path($diff->{'file'}));
4943                         print "</td>\n";
4944                         print "<td>$mode_chnge</td>\n";
4945                         print "<td class=\"link\">";
4946                         if ($action eq 'commitdiff') {
4947                                 # link to patch
4948                                 $patchno++;
4949                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4950                                               "patch") .
4951                                       " | ";
4952                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4953                                 # "commit" view and modified file (not onlu mode changed)
4954                                 print $cgi->a({-href => href(action=>"blobdiff",
4955                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4956                                                              hash_base=>$hash, hash_parent_base=>$parent,
4957                                                              file_name=>$diff->{'file'})},
4958                                               "diff") .
4959                                       " | ";
4960                         }
4961                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4962                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4963                                        "blob") . " | ";
4964                         if ($have_blame) {
4965                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4966                                                              file_name=>$diff->{'file'})},
4967                                               "blame") . " | ";
4968                         }
4969                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4970                                                      file_name=>$diff->{'file'})},
4971                                       "history");
4972                         print "</td>\n";
4973
4974                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4975                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4976                         my $nstatus = $status_name{$diff->{'status'}};
4977                         my $mode_chng = "";
4978                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4979                                 # mode also for directories, so we cannot use $to_mode_str
4980                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4981                         }
4982                         print "<td>" .
4983                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4984                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4985                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4986                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4987                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4988                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4989                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4990                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4991                               "<td class=\"link\">";
4992                         if ($action eq 'commitdiff') {
4993                                 # link to patch
4994                                 $patchno++;
4995                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4996                                               "patch") .
4997                                       " | ";
4998                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4999                                 # "commit" view and modified file (not only pure rename or copy)
5000                                 print $cgi->a({-href => href(action=>"blobdiff",
5001                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5002                                                              hash_base=>$hash, hash_parent_base=>$parent,
5003                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5004                                               "diff") .
5005                                       " | ";
5006                         }
5007                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5008                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5009                                       "blob") . " | ";
5010                         if ($have_blame) {
5011                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5012                                                              file_name=>$diff->{'to_file'})},
5013                                               "blame") . " | ";
5014                         }
5015                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5016                                                     file_name=>$diff->{'to_file'})},
5017                                       "history");
5018                         print "</td>\n";
5019
5020                 } # we should not encounter Unmerged (U) or Unknown (X) status
5021                 print "</tr>\n";
5022         }
5023         print "</tbody>" if $has_header;
5024         print "</table>\n";
5025 }
5026
5027 # Print context lines and then rem/add lines in a side-by-side manner.
5028 sub print_sidebyside_diff_lines {
5029         my ($ctx, $rem, $add) = @_;
5030
5031         # print context block before add/rem block
5032         if (@$ctx) {
5033                 print join '',
5034                         '<div class="chunk_block ctx">',
5035                                 '<div class="old">',
5036                                 @$ctx,
5037                                 '</div>',
5038                                 '<div class="new">',
5039                                 @$ctx,
5040                                 '</div>',
5041                         '</div>';
5042         }
5043
5044         if (!@$add) {
5045                 # pure removal
5046                 print join '',
5047                         '<div class="chunk_block rem">',
5048                                 '<div class="old">',
5049                                 @$rem,
5050                                 '</div>',
5051                         '</div>';
5052         } elsif (!@$rem) {
5053                 # pure addition
5054                 print join '',
5055                         '<div class="chunk_block add">',
5056                                 '<div class="new">',
5057                                 @$add,
5058                                 '</div>',
5059                         '</div>';
5060         } else {
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 }
5072
5073 # Print context lines and then rem/add lines in inline manner.
5074 sub print_inline_diff_lines {
5075         my ($ctx, $rem, $add) = @_;
5076
5077         print @$ctx, @$rem, @$add;
5078 }
5079
5080 # Format removed and added line, mark changed part and HTML-format them.
5081 # Implementation is based on contrib/diff-highlight
5082 sub format_rem_add_lines_pair {
5083         my ($rem, $add, $num_parents) = @_;
5084
5085         # We need to untabify lines before split()'ing them;
5086         # otherwise offsets would be invalid.
5087         chomp $rem;
5088         chomp $add;
5089         $rem = untabify($rem);
5090         $add = untabify($add);
5091
5092         my @rem = split(//, $rem);
5093         my @add = split(//, $add);
5094         my ($esc_rem, $esc_add);
5095         # Ignore leading +/- characters for each parent.
5096         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5097         my ($prefix_has_nonspace, $suffix_has_nonspace);
5098
5099         my $shorter = (@rem < @add) ? @rem : @add;
5100         while ($prefix_len < $shorter) {
5101                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5102
5103                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5104                 $prefix_len++;
5105         }
5106
5107         while ($prefix_len + $suffix_len < $shorter) {
5108                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5109
5110                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5111                 $suffix_len++;
5112         }
5113
5114         # Mark lines that are different from each other, but have some common
5115         # part that isn't whitespace.  If lines are completely different, don't
5116         # mark them because that would make output unreadable, especially if
5117         # diff consists of multiple lines.
5118         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5119                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5120                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5121                 $esc_add = esc_html_hl_regions($add, 'marked',
5122                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5123         } else {
5124                 $esc_rem = esc_html($rem, -nbsp=>1);
5125                 $esc_add = esc_html($add, -nbsp=>1);
5126         }
5127
5128         return format_diff_line(\$esc_rem, 'rem'),
5129                format_diff_line(\$esc_add, 'add');
5130 }
5131
5132 # HTML-format diff context, removed and added lines.
5133 sub format_ctx_rem_add_lines {
5134         my ($ctx, $rem, $add, $num_parents) = @_;
5135         my (@new_ctx, @new_rem, @new_add);
5136         my $can_highlight = 0;
5137         my $is_combined = ($num_parents > 1);
5138
5139         # Highlight if every removed line has a corresponding added line.
5140         if (@$add > 0 && @$add == @$rem) {
5141                 $can_highlight = 1;
5142
5143                 # Highlight lines in combined diff only if the chunk contains
5144                 # diff between the same version, e.g.
5145                 #
5146                 #    - a
5147                 #   -  b
5148                 #    + c
5149                 #   +  d
5150                 #
5151                 # Otherwise the highlightling would be confusing.
5152                 if ($is_combined) {
5153                         for (my $i = 0; $i < @$add; $i++) {
5154                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5155                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5156
5157                                 $prefix_rem =~ s/-/+/g;
5158
5159                                 if ($prefix_rem ne $prefix_add) {
5160                                         $can_highlight = 0;
5161                                         last;
5162                                 }
5163                         }
5164                 }
5165         }
5166
5167         if ($can_highlight) {
5168                 for (my $i = 0; $i < @$add; $i++) {
5169                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5170                                 $rem->[$i], $add->[$i], $num_parents);
5171                         push @new_rem, $line_rem;
5172                         push @new_add, $line_add;
5173                 }
5174         } else {
5175                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5176                 @new_add = map { format_diff_line($_, 'add') } @$add;
5177         }
5178
5179         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5180
5181         return (\@new_ctx, \@new_rem, \@new_add);
5182 }
5183
5184 # Print context lines and then rem/add lines.
5185 sub print_diff_lines {
5186         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5187         my $is_combined = $num_parents > 1;
5188
5189         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5190                 $num_parents);
5191
5192         if ($diff_style eq 'sidebyside' && !$is_combined) {
5193                 print_sidebyside_diff_lines($ctx, $rem, $add);
5194         } else {
5195                 # default 'inline' style and unknown styles
5196                 print_inline_diff_lines($ctx, $rem, $add);
5197         }
5198 }
5199
5200 sub print_diff_chunk {
5201         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5202         my (@ctx, @rem, @add);
5203
5204         # The class of the previous line.
5205         my $prev_class = '';
5206
5207         return unless @chunk;
5208
5209         # incomplete last line might be among removed or added lines,
5210         # or both, or among context lines: find which
5211         for (my $i = 1; $i < @chunk; $i++) {
5212                 if ($chunk[$i][0] eq 'incomplete') {
5213                         $chunk[$i][0] = $chunk[$i-1][0];
5214                 }
5215         }
5216
5217         # guardian
5218         push @chunk, ["", ""];
5219
5220         foreach my $line_info (@chunk) {
5221                 my ($class, $line) = @$line_info;
5222
5223                 # print chunk headers
5224                 if ($class && $class eq 'chunk_header') {
5225                         print format_diff_line($line, $class, $from, $to);
5226                         next;
5227                 }
5228
5229                 ## print from accumulator when have some add/rem lines or end
5230                 # of chunk (flush context lines), or when have add and rem
5231                 # lines and new block is reached (otherwise add/rem lines could
5232                 # be reordered)
5233                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5234                     (@rem && @add && $class ne $prev_class)) {
5235                         print_diff_lines(\@ctx, \@rem, \@add,
5236                                          $diff_style, $num_parents);
5237                         @ctx = @rem = @add = ();
5238                 }
5239
5240                 ## adding lines to accumulator
5241                 # guardian value
5242                 last unless $line;
5243                 # rem, add or change
5244                 if ($class eq 'rem') {
5245                         push @rem, $line;
5246                 } elsif ($class eq 'add') {
5247                         push @add, $line;
5248                 }
5249                 # context line
5250                 if ($class eq 'ctx') {
5251                         push @ctx, $line;
5252                 }
5253
5254                 $prev_class = $class;
5255         }
5256 }
5257
5258 sub git_patchset_body {
5259         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5260         my ($hash_parent) = $hash_parents[0];
5261
5262         my $is_combined = (@hash_parents > 1);
5263         my $patch_idx = 0;
5264         my $patch_number = 0;
5265         my $patch_line;
5266         my $diffinfo;
5267         my $to_name;
5268         my (%from, %to);
5269         my @chunk; # for side-by-side diff
5270
5271         print "<div class=\"patchset\">\n";
5272
5273         # skip to first patch
5274         while ($patch_line = <$fd>) {
5275                 chomp $patch_line;
5276
5277                 last if ($patch_line =~ m/^diff /);
5278         }
5279
5280  PATCH:
5281         while ($patch_line) {
5282
5283                 # parse "git diff" header line
5284                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5285                         # $1 is from_name, which we do not use
5286                         $to_name = unquote($2);
5287                         $to_name =~ s!^b/!!;
5288                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5289                         # $1 is 'cc' or 'combined', which we do not use
5290                         $to_name = unquote($2);
5291                 } else {
5292                         $to_name = undef;
5293                 }
5294
5295                 # check if current patch belong to current raw line
5296                 # and parse raw git-diff line if needed
5297                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5298                         # this is continuation of a split patch
5299                         print "<div class=\"patch cont\">\n";
5300                 } else {
5301                         # advance raw git-diff output if needed
5302                         $patch_idx++ if defined $diffinfo;
5303
5304                         # read and prepare patch information
5305                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5306
5307                         # compact combined diff output can have some patches skipped
5308                         # find which patch (using pathname of result) we are at now;
5309                         if ($is_combined) {
5310                                 while ($to_name ne $diffinfo->{'to_file'}) {
5311                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5312                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5313                                               "</div>\n";  # class="patch"
5314
5315                                         $patch_idx++;
5316                                         $patch_number++;
5317
5318                                         last if $patch_idx > $#$difftree;
5319                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5320                                 }
5321                         }
5322
5323                         # modifies %from, %to hashes
5324                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5325
5326                         # this is first patch for raw difftree line with $patch_idx index
5327                         # we index @$difftree array from 0, but number patches from 1
5328                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5329                 }
5330
5331                 # git diff header
5332                 #assert($patch_line =~ m/^diff /) if DEBUG;
5333                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5334                 $patch_number++;
5335                 # print "git diff" header
5336                 print format_git_diff_header_line($patch_line, $diffinfo,
5337                                                   \%from, \%to);
5338
5339                 # print extended diff header
5340                 print "<div class=\"diff extended_header\">\n";
5341         EXTENDED_HEADER:
5342                 while ($patch_line = <$fd>) {
5343                         chomp $patch_line;
5344
5345                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5346
5347                         print format_extended_diff_header_line($patch_line, $diffinfo,
5348                                                                \%from, \%to);
5349                 }
5350                 print "</div>\n"; # class="diff extended_header"
5351
5352                 # from-file/to-file diff header
5353                 if (! $patch_line) {
5354                         print "</div>\n"; # class="patch"
5355                         last PATCH;
5356                 }
5357                 next PATCH if ($patch_line =~ m/^diff /);
5358                 #assert($patch_line =~ m/^---/) if DEBUG;
5359
5360                 my $last_patch_line = $patch_line;
5361                 $patch_line = <$fd>;
5362                 chomp $patch_line;
5363                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5364
5365                 print format_diff_from_to_header($last_patch_line, $patch_line,
5366                                                  $diffinfo, \%from, \%to,
5367                                                  @hash_parents);
5368
5369                 # the patch itself
5370         LINE:
5371                 while ($patch_line = <$fd>) {
5372                         chomp $patch_line;
5373
5374                         next PATCH if ($patch_line =~ m/^diff /);
5375
5376                         my $class = diff_line_class($patch_line, \%from, \%to);
5377
5378                         if ($class eq 'chunk_header') {
5379                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5380                                 @chunk = ();
5381                         }
5382
5383                         push @chunk, [ $class, $patch_line ];
5384                 }
5385
5386         } continue {
5387                 if (@chunk) {
5388                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5389                         @chunk = ();
5390                 }
5391                 print "</div>\n"; # class="patch"
5392         }
5393
5394         # for compact combined (--cc) format, with chunk and patch simplification
5395         # the patchset might be empty, but there might be unprocessed raw lines
5396         for (++$patch_idx if $patch_number > 0;
5397              $patch_idx < @$difftree;
5398              ++$patch_idx) {
5399                 # read and prepare patch information
5400                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5401
5402                 # generate anchor for "patch" links in difftree / whatchanged part
5403                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5404                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5405                       "</div>\n";  # class="patch"
5406
5407                 $patch_number++;
5408         }
5409
5410         if ($patch_number == 0) {
5411                 if (@hash_parents > 1) {
5412                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5413                 } else {
5414                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5415                 }
5416         }
5417
5418         print "</div>\n"; # class="patchset"
5419 }
5420
5421 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5422
5423 sub git_project_search_form {
5424         my ($searchtext, $search_use_regexp) = @_;
5425
5426         my $limit = '';
5427         if ($project_filter) {
5428                 $limit = " in '$project_filter/'";
5429         }
5430
5431         print "<div class=\"projsearch\">\n";
5432         print $cgi->startform(-method => 'get', -action => $my_uri) .
5433               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5434         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5435                 if (defined $project_filter);
5436         print $cgi->textfield(-name => 's', -value => $searchtext,
5437                               -title => "Search project by name and description$limit",
5438                               -size => 60) . "\n" .
5439               "<span title=\"Extended regular expression\">" .
5440               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5441                              -checked => $search_use_regexp) .
5442               "</span>\n" .
5443               $cgi->submit(-name => 'btnS', -value => 'Search') .
5444               $cgi->end_form() . "\n" .
5445               $cgi->a({-href => href(project => undef, searchtext => undef,
5446                                      project_filter => $project_filter)},
5447                       esc_html("List all projects$limit")) . "<br />\n";
5448         print "</div>\n";
5449 }
5450
5451 # entry for given @keys needs filling if at least one of keys in list
5452 # is not present in %$project_info
5453 sub project_info_needs_filling {
5454         my ($project_info, @keys) = @_;
5455
5456         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5457         foreach my $key (@keys) {
5458                 if (!exists $project_info->{$key}) {
5459                         return 1;
5460                 }
5461         }
5462         return;
5463 }
5464
5465 # fills project list info (age, description, owner, category, forks, etc.)
5466 # for each project in the list, removing invalid projects from
5467 # returned list, or fill only specified info.
5468 #
5469 # Invalid projects are removed from the returned list if and only if you
5470 # ask 'age' or 'age_string' to be filled, because they are the only fields
5471 # that run unconditionally git command that requires repository, and
5472 # therefore do always check if project repository is invalid.
5473 #
5474 # USAGE:
5475 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5476 #   ensures that 'descr_long' and 'ctags' fields are filled
5477 # * @project_list = fill_project_list_info(\@project_list)
5478 #   ensures that all fields are filled (and invalid projects removed)
5479 #
5480 # NOTE: modifies $projlist, but does not remove entries from it
5481 sub fill_project_list_info {
5482         my ($projlist, @wanted_keys) = @_;
5483         my @projects;
5484         my $filter_set = sub { return @_; };
5485         if (@wanted_keys) {
5486                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5487                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5488         }
5489
5490         my $show_ctags = gitweb_check_feature('ctags');
5491  PROJECT:
5492         foreach my $pr (@$projlist) {
5493                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5494                         my (@activity) = git_get_last_activity($pr->{'path'});
5495                         unless (@activity) {
5496                                 next PROJECT;
5497                         }
5498                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5499                 }
5500                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5501                         my $descr = git_get_project_description($pr->{'path'}) || "";
5502                         $descr = to_utf8($descr);
5503                         $pr->{'descr_long'} = $descr;
5504                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5505                 }
5506                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5507                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5508                 }
5509                 if ($show_ctags &&
5510                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5511                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5512                 }
5513                 if ($projects_list_group_categories &&
5514                     project_info_needs_filling($pr, $filter_set->('category'))) {
5515                         my $cat = git_get_project_category($pr->{'path'}) ||
5516                                                            $project_list_default_category;
5517                         $pr->{'category'} = to_utf8($cat);
5518                 }
5519
5520                 push @projects, $pr;
5521         }
5522
5523         return @projects;
5524 }
5525
5526 sub sort_projects_list {
5527         my ($projlist, $order) = @_;
5528         my @projects;
5529
5530         my %order_info = (
5531                 project => { key => 'path', type => 'str' },
5532                 descr => { key => 'descr_long', type => 'str' },
5533                 owner => { key => 'owner', type => 'str' },
5534                 age => { key => 'age', type => 'num' }
5535         );
5536         my $oi = $order_info{$order};
5537         return @$projlist unless defined $oi;
5538         if ($oi->{'type'} eq 'str') {
5539                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5540         } else {
5541                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5542         }
5543
5544         return @projects;
5545 }
5546
5547 # returns a hash of categories, containing the list of project
5548 # belonging to each category
5549 sub build_projlist_by_category {
5550         my ($projlist, $from, $to) = @_;
5551         my %categories;
5552
5553         $from = 0 unless defined $from;
5554         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5555
5556         for (my $i = $from; $i <= $to; $i++) {
5557                 my $pr = $projlist->[$i];
5558                 push @{$categories{ $pr->{'category'} }}, $pr;
5559         }
5560
5561         return wantarray ? %categories : \%categories;
5562 }
5563
5564 # print 'sort by' <th> element, generating 'sort by $name' replay link
5565 # if that order is not selected
5566 sub print_sort_th {
5567         print format_sort_th(@_);
5568 }
5569
5570 sub format_sort_th {
5571         my ($name, $order, $header) = @_;
5572         my $sort_th = "";
5573         $header ||= ucfirst($name);
5574
5575         if ($order eq $name) {
5576                 $sort_th .= "<th>$header</th>\n";
5577         } else {
5578                 $sort_th .= "<th>" .
5579                             $cgi->a({-href => href(-replay=>1, order=>$name),
5580                                      -class => "header"}, $header) .
5581                             "</th>\n";
5582         }
5583
5584         return $sort_th;
5585 }
5586
5587 sub git_project_list_rows {
5588         my ($projlist, $from, $to, $check_forks) = @_;
5589
5590         $from = 0 unless defined $from;
5591         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5592
5593         my $alternate = 1;
5594         for (my $i = $from; $i <= $to; $i++) {
5595                 my $pr = $projlist->[$i];
5596
5597                 if ($alternate) {
5598                         print "<tr class=\"dark\">\n";
5599                 } else {
5600                         print "<tr class=\"light\">\n";
5601                 }
5602                 $alternate ^= 1;
5603
5604                 if ($check_forks) {
5605                         print "<td>";
5606                         if ($pr->{'forks'}) {
5607                                 my $nforks = scalar @{$pr->{'forks'}};
5608                                 if ($nforks > 0) {
5609                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5610                                                        -title => "$nforks forks"}, "+");
5611                                 } else {
5612                                         print $cgi->span({-title => "$nforks forks"}, "+");
5613                                 }
5614                         }
5615                         print "</td>\n";
5616                 }
5617                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5618                                         -class => "list"},
5619                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5620                       "</td>\n" .
5621                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5622                                         -class => "list",
5623                                         -title => $pr->{'descr_long'}},
5624                                         $search_regexp
5625                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5626                                                                     $pr->{'descr'}, $search_regexp)
5627                                         : esc_html($pr->{'descr'})) .
5628                       "</td>\n";
5629                 unless ($omit_owner) {
5630                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5631                 }
5632                 unless ($omit_age_column) {
5633                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5634                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5635                 }
5636                 print"<td class=\"link\">" .
5637                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5638                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5639                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5640                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5641                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5642                       "</td>\n" .
5643                       "</tr>\n";
5644         }
5645 }
5646
5647 sub git_project_list_body {
5648         # actually uses global variable $project
5649         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5650         my @projects = @$projlist;
5651
5652         my $check_forks = gitweb_check_feature('forks');
5653         my $show_ctags  = gitweb_check_feature('ctags');
5654         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5655         $check_forks = undef
5656                 if ($tagfilter || $search_regexp);
5657
5658         # filtering out forks before filling info allows to do less work
5659         @projects = filter_forks_from_projects_list(\@projects)
5660                 if ($check_forks);
5661         # search_projects_list pre-fills required info
5662         @projects = search_projects_list(\@projects,
5663                                          'search_regexp' => $search_regexp,
5664                                          'tagfilter'  => $tagfilter)
5665                 if ($tagfilter || $search_regexp);
5666         # fill the rest
5667         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5668         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5669         push @all_fields, 'owner' unless($omit_owner);
5670         @projects = fill_project_list_info(\@projects, @all_fields);
5671
5672         $order ||= $default_projects_order;
5673         $from = 0 unless defined $from;
5674         $to = $#projects if (!defined $to || $#projects < $to);
5675
5676         # short circuit
5677         if ($from > $to) {
5678                 print "<center>\n".
5679                       "<b>No such projects found</b><br />\n".
5680                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5681                       "</center>\n<br />\n";
5682                 return;
5683         }
5684
5685         @projects = sort_projects_list(\@projects, $order);
5686
5687         if ($show_ctags) {
5688                 my $ctags = git_gather_all_ctags(\@projects);
5689                 my $cloud = git_populate_project_tagcloud($ctags);
5690                 print git_show_project_tagcloud($cloud, 64);
5691         }
5692
5693         print "<table class=\"project_list\">\n";
5694         unless ($no_header) {
5695                 print "<tr>\n";
5696                 if ($check_forks) {
5697                         print "<th></th>\n";
5698                 }
5699                 print_sort_th('project', $order, 'Project');
5700                 print_sort_th('descr', $order, 'Description');
5701                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5702                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5703                 print "<th></th>\n" . # for links
5704                       "</tr>\n";
5705         }
5706
5707         if ($projects_list_group_categories) {
5708                 # only display categories with projects in the $from-$to window
5709                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5710                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5711                 foreach my $cat (sort keys %categories) {
5712                         unless ($cat eq "") {
5713                                 print "<tr>\n";
5714                                 if ($check_forks) {
5715                                         print "<td></td>\n";
5716                                 }
5717                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5718                                 print "</tr>\n";
5719                         }
5720
5721                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5722                 }
5723         } else {
5724                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5725         }
5726
5727         if (defined $extra) {
5728                 print "<tr>\n";
5729                 if ($check_forks) {
5730                         print "<td></td>\n";
5731                 }
5732                 print "<td colspan=\"5\">$extra</td>\n" .
5733                       "</tr>\n";
5734         }
5735         print "</table>\n";
5736 }
5737
5738 sub git_log_body {
5739         # uses global variable $project
5740         my ($commitlist, $from, $to, $refs, $extra) = @_;
5741
5742         $from = 0 unless defined $from;
5743         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5744
5745         for (my $i = 0; $i <= $to; $i++) {
5746                 my %co = %{$commitlist->[$i]};
5747                 next if !%co;
5748                 my $commit = $co{'id'};
5749                 my $ref = format_ref_marker($refs, $commit);
5750                 git_print_header_div('commit',
5751                                "<span class=\"age\">$co{'age_string'}</span>" .
5752                                esc_html($co{'title'}) . $ref,
5753                                $commit);
5754                 print "<div class=\"title_text\">\n" .
5755                       "<div class=\"log_link\">\n" .
5756                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5757                       " | " .
5758                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5759                       " | " .
5760                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5761                       "<br/>\n" .
5762                       "</div>\n";
5763                       git_print_authorship(\%co, -tag => 'span');
5764                       print "<br/>\n</div>\n";
5765
5766                 print "<div class=\"log_body\">\n";
5767                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5768                 print "</div>\n";
5769         }
5770         if ($extra) {
5771                 print "<div class=\"page_nav\">\n";
5772                 print "$extra\n";
5773                 print "</div>\n";
5774         }
5775 }
5776
5777 sub git_shortlog_body {
5778         # uses global variable $project
5779         my ($commitlist, $from, $to, $refs, $extra) = @_;
5780
5781         $from = 0 unless defined $from;
5782         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5783
5784         print "<table class=\"shortlog\">\n";
5785         my $alternate = 1;
5786         for (my $i = $from; $i <= $to; $i++) {
5787                 my %co = %{$commitlist->[$i]};
5788                 my $commit = $co{'id'};
5789                 my $ref = format_ref_marker($refs, $commit);
5790                 if ($alternate) {
5791                         print "<tr class=\"dark\">\n";
5792                 } else {
5793                         print "<tr class=\"light\">\n";
5794                 }
5795                 $alternate ^= 1;
5796                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5797                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5798                       format_author_html('td', \%co, 10) . "<td>";
5799                 print format_subject_html($co{'title'}, $co{'title_short'},
5800                                           href(action=>"commit", hash=>$commit), $ref);
5801                 print "</td>\n" .
5802                       "<td class=\"link\">" .
5803                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5804                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5805                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5806                 my $snapshot_links = format_snapshot_links($commit);
5807                 if (defined $snapshot_links) {
5808                         print " | " . $snapshot_links;
5809                 }
5810                 print "</td>\n" .
5811                       "</tr>\n";
5812         }
5813         if (defined $extra) {
5814                 print "<tr>\n" .
5815                       "<td colspan=\"4\">$extra</td>\n" .
5816                       "</tr>\n";
5817         }
5818         print "</table>\n";
5819 }
5820
5821 sub git_history_body {
5822         # Warning: assumes constant type (blob or tree) during history
5823         my ($commitlist, $from, $to, $refs, $extra,
5824             $file_name, $file_hash, $ftype) = @_;
5825
5826         $from = 0 unless defined $from;
5827         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5828
5829         print "<table class=\"history\">\n";
5830         my $alternate = 1;
5831         for (my $i = $from; $i <= $to; $i++) {
5832                 my %co = %{$commitlist->[$i]};
5833                 if (!%co) {
5834                         next;
5835                 }
5836                 my $commit = $co{'id'};
5837
5838                 my $ref = format_ref_marker($refs, $commit);
5839
5840                 if ($alternate) {
5841                         print "<tr class=\"dark\">\n";
5842                 } else {
5843                         print "<tr class=\"light\">\n";
5844                 }
5845                 $alternate ^= 1;
5846                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5847         # shortlog:   format_author_html('td', \%co, 10)
5848                       format_author_html('td', \%co, 15, 3) . "<td>";
5849                 # originally git_history used chop_str($co{'title'}, 50)
5850                 print format_subject_html($co{'title'}, $co{'title_short'},
5851                                           href(action=>"commit", hash=>$commit), $ref);
5852                 print "</td>\n" .
5853                       "<td class=\"link\">" .
5854                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5855                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5856
5857                 if ($ftype eq 'blob') {
5858                         my $blob_current = $file_hash;
5859                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5860                         if (defined $blob_current && defined $blob_parent &&
5861                                         $blob_current ne $blob_parent) {
5862                                 print " | " .
5863                                         $cgi->a({-href => href(action=>"blobdiff",
5864                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5865                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5866                                                                file_name=>$file_name)},
5867                                                 "diff to current");
5868                         }
5869                 }
5870                 print "</td>\n" .
5871                       "</tr>\n";
5872         }
5873         if (defined $extra) {
5874                 print "<tr>\n" .
5875                       "<td colspan=\"4\">$extra</td>\n" .
5876                       "</tr>\n";
5877         }
5878         print "</table>\n";
5879 }
5880
5881 sub git_tags_body {
5882         # uses global variable $project
5883         my ($taglist, $from, $to, $extra) = @_;
5884         $from = 0 unless defined $from;
5885         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5886
5887         print "<table class=\"tags\">\n";
5888         my $alternate = 1;
5889         for (my $i = $from; $i <= $to; $i++) {
5890                 my $entry = $taglist->[$i];
5891                 my %tag = %$entry;
5892                 my $comment = $tag{'subject'};
5893                 my $comment_short;
5894                 if (defined $comment) {
5895                         $comment_short = chop_str($comment, 30, 5);
5896                 }
5897                 if ($alternate) {
5898                         print "<tr class=\"dark\">\n";
5899                 } else {
5900                         print "<tr class=\"light\">\n";
5901                 }
5902                 $alternate ^= 1;
5903                 if (defined $tag{'age'}) {
5904                         print "<td><i>$tag{'age'}</i></td>\n";
5905                 } else {
5906                         print "<td></td>\n";
5907                 }
5908                 print "<td>" .
5909                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5910                                -class => "list name"}, esc_html($tag{'name'})) .
5911                       "</td>\n" .
5912                       "<td>";
5913                 if (defined $comment) {
5914                         print format_subject_html($comment, $comment_short,
5915                                                   href(action=>"tag", hash=>$tag{'id'}));
5916                 }
5917                 print "</td>\n" .
5918                       "<td class=\"selflink\">";
5919                 if ($tag{'type'} eq "tag") {
5920                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5921                 } else {
5922                         print "&nbsp;";
5923                 }
5924                 print "</td>\n" .
5925                       "<td class=\"link\">" . " | " .
5926                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5927                 if ($tag{'reftype'} eq "commit") {
5928                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5929                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5930                 } elsif ($tag{'reftype'} eq "blob") {
5931                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5932                 }
5933                 print "</td>\n" .
5934                       "</tr>";
5935         }
5936         if (defined $extra) {
5937                 print "<tr>\n" .
5938                       "<td colspan=\"5\">$extra</td>\n" .
5939                       "</tr>\n";
5940         }
5941         print "</table>\n";
5942 }
5943
5944 sub git_heads_body {
5945         # uses global variable $project
5946         my ($headlist, $head_at, $from, $to, $extra) = @_;
5947         $from = 0 unless defined $from;
5948         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5949
5950         print "<table class=\"heads\">\n";
5951         my $alternate = 1;
5952         for (my $i = $from; $i <= $to; $i++) {
5953                 my $entry = $headlist->[$i];
5954                 my %ref = %$entry;
5955                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5956                 if ($alternate) {
5957                         print "<tr class=\"dark\">\n";
5958                 } else {
5959                         print "<tr class=\"light\">\n";
5960                 }
5961                 $alternate ^= 1;
5962                 print "<td><i>$ref{'age'}</i></td>\n" .
5963                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5964                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5965                                -class => "list name"},esc_html($ref{'name'})) .
5966                       "</td>\n" .
5967                       "<td class=\"link\">" .
5968                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5969                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5970                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5971                       "</td>\n" .
5972                       "</tr>";
5973         }
5974         if (defined $extra) {
5975                 print "<tr>\n" .
5976                       "<td colspan=\"3\">$extra</td>\n" .
5977                       "</tr>\n";
5978         }
5979         print "</table>\n";
5980 }
5981
5982 # Display a single remote block
5983 sub git_remote_block {
5984         my ($remote, $rdata, $limit, $head) = @_;
5985
5986         my $heads = $rdata->{'heads'};
5987         my $fetch = $rdata->{'fetch'};
5988         my $push = $rdata->{'push'};
5989
5990         my $urls_table = "<table class=\"projects_list\">\n" ;
5991
5992         if (defined $fetch) {
5993                 if ($fetch eq $push) {
5994                         $urls_table .= format_repo_url("URL", $fetch);
5995                 } else {
5996                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5997                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5998                 }
5999         } elsif (defined $push) {
6000                 $urls_table .= format_repo_url("Push URL", $push);
6001         } else {
6002                 $urls_table .= format_repo_url("", "No remote URL");
6003         }
6004
6005         $urls_table .= "</table>\n";
6006
6007         my $dots;
6008         if (defined $limit && $limit < @$heads) {
6009                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6010         }
6011
6012         print $urls_table;
6013         git_heads_body($heads, $head, 0, $limit, $dots);
6014 }
6015
6016 # Display a list of remote names with the respective fetch and push URLs
6017 sub git_remotes_list {
6018         my ($remotedata, $limit) = @_;
6019         print "<table class=\"heads\">\n";
6020         my $alternate = 1;
6021         my @remotes = sort keys %$remotedata;
6022
6023         my $limited = $limit && $limit < @remotes;
6024
6025         $#remotes = $limit - 1 if $limited;
6026
6027         while (my $remote = shift @remotes) {
6028                 my $rdata = $remotedata->{$remote};
6029                 my $fetch = $rdata->{'fetch'};
6030                 my $push = $rdata->{'push'};
6031                 if ($alternate) {
6032                         print "<tr class=\"dark\">\n";
6033                 } else {
6034                         print "<tr class=\"light\">\n";
6035                 }
6036                 $alternate ^= 1;
6037                 print "<td>" .
6038                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6039                                -class=> "list name"},esc_html($remote)) .
6040                       "</td>";
6041                 print "<td class=\"link\">" .
6042                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6043                       " | " .
6044                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6045                       "</td>";
6046
6047                 print "</tr>\n";
6048         }
6049
6050         if ($limited) {
6051                 print "<tr>\n" .
6052                       "<td colspan=\"3\">" .
6053                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6054                       "</td>\n" . "</tr>\n";
6055         }
6056
6057         print "</table>";
6058 }
6059
6060 # Display remote heads grouped by remote, unless there are too many
6061 # remotes, in which case we only display the remote names
6062 sub git_remotes_body {
6063         my ($remotedata, $limit, $head) = @_;
6064         if ($limit and $limit < keys %$remotedata) {
6065                 git_remotes_list($remotedata, $limit);
6066         } else {
6067                 fill_remote_heads($remotedata);
6068                 while (my ($remote, $rdata) = each %$remotedata) {
6069                         git_print_section({-class=>"remote", -id=>$remote},
6070                                 ["remotes", $remote, $remote], sub {
6071                                         git_remote_block($remote, $rdata, $limit, $head);
6072                                 });
6073                 }
6074         }
6075 }
6076
6077 sub git_search_message {
6078         my %co = @_;
6079
6080         my $greptype;
6081         if ($searchtype eq 'commit') {
6082                 $greptype = "--grep=";
6083         } elsif ($searchtype eq 'author') {
6084                 $greptype = "--author=";
6085         } elsif ($searchtype eq 'committer') {
6086                 $greptype = "--committer=";
6087         }
6088         $greptype .= $searchtext;
6089         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6090                                        $greptype, '--regexp-ignore-case',
6091                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6092
6093         my $paging_nav = '';
6094         if ($page > 0) {
6095                 $paging_nav .=
6096                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6097                                 "first") .
6098                         " &sdot; " .
6099                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6100                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6101         } else {
6102                 $paging_nav .= "first &sdot; prev";
6103         }
6104         my $next_link = '';
6105         if ($#commitlist >= 100) {
6106                 $next_link =
6107                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6108                                  -accesskey => "n", -title => "Alt-n"}, "next");
6109                 $paging_nav .= " &sdot; $next_link";
6110         } else {
6111                 $paging_nav .= " &sdot; next";
6112         }
6113
6114         git_header_html();
6115
6116         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6117         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6118         if ($page == 0 && !@commitlist) {
6119                 print "<p>No match.</p>\n";
6120         } else {
6121                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6122         }
6123
6124         git_footer_html();
6125 }
6126
6127 sub git_search_changes {
6128         my %co = @_;
6129
6130         local $/ = "\n";
6131         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6132                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6133                 ($search_use_regexp ? '--pickaxe-regex' : ())
6134                         or die_error(500, "Open git-log failed");
6135
6136         git_header_html();
6137
6138         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6139         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6140
6141         print "<table class=\"pickaxe search\">\n";
6142         my $alternate = 1;
6143         undef %co;
6144         my @files;
6145         while (my $line = <$fd>) {
6146                 chomp $line;
6147                 next unless $line;
6148
6149                 my %set = parse_difftree_raw_line($line);
6150                 if (defined $set{'commit'}) {
6151                         # finish previous commit
6152                         if (%co) {
6153                                 print "</td>\n" .
6154                                       "<td class=\"link\">" .
6155                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6156                                               "commit") .
6157                                       " | " .
6158                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6159                                                              hash_base=>$co{'id'})},
6160                                               "tree") .
6161                                       "</td>\n" .
6162                                       "</tr>\n";
6163                         }
6164
6165                         if ($alternate) {
6166                                 print "<tr class=\"dark\">\n";
6167                         } else {
6168                                 print "<tr class=\"light\">\n";
6169                         }
6170                         $alternate ^= 1;
6171                         %co = parse_commit($set{'commit'});
6172                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6173                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6174                               "<td><i>$author</i></td>\n" .
6175                               "<td>" .
6176                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6177                                       -class => "list subject"},
6178                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6179                 } elsif (defined $set{'to_id'}) {
6180                         next if ($set{'to_id'} =~ m/^0{40}$/);
6181
6182                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6183                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6184                                       -class => "list"},
6185                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6186                               "<br/>\n";
6187                 }
6188         }
6189         close $fd;
6190
6191         # finish last commit (warning: repetition!)
6192         if (%co) {
6193                 print "</td>\n" .
6194                       "<td class=\"link\">" .
6195                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6196                               "commit") .
6197                       " | " .
6198                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6199                                              hash_base=>$co{'id'})},
6200                               "tree") .
6201                       "</td>\n" .
6202                       "</tr>\n";
6203         }
6204
6205         print "</table>\n";
6206
6207         git_footer_html();
6208 }
6209
6210 sub git_search_files {
6211         my %co = @_;
6212
6213         local $/ = "\n";
6214         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6215                 $search_use_regexp ? ('-E', '-i') : '-F',
6216                 $searchtext, $co{'tree'}
6217                         or die_error(500, "Open git-grep failed");
6218
6219         git_header_html();
6220
6221         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6222         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6223
6224         print "<table class=\"grep_search\">\n";
6225         my $alternate = 1;
6226         my $matches = 0;
6227         my $lastfile = '';
6228         my $file_href;
6229         while (my $line = <$fd>) {
6230                 chomp $line;
6231                 my ($file, $lno, $ltext, $binary);
6232                 last if ($matches++ > 1000);
6233                 if ($line =~ /^Binary file (.+) matches$/) {
6234                         $file = $1;
6235                         $binary = 1;
6236                 } else {
6237                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6238                         $file =~ s/^$co{'tree'}://;
6239                 }
6240                 if ($file ne $lastfile) {
6241                         $lastfile and print "</td></tr>\n";
6242                         if ($alternate++) {
6243                                 print "<tr class=\"dark\">\n";
6244                         } else {
6245                                 print "<tr class=\"light\">\n";
6246                         }
6247                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6248                                           file_name=>$file);
6249                         print "<td class=\"list\">".
6250                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6251                         print "</td><td>\n";
6252                         $lastfile = $file;
6253                 }
6254                 if ($binary) {
6255                         print "<div class=\"binary\">Binary file</div>\n";
6256                 } else {
6257                         $ltext = untabify($ltext);
6258                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6259                                 $ltext = esc_html($1, -nbsp=>1);
6260                                 $ltext .= '<span class="match">';
6261                                 $ltext .= esc_html($2, -nbsp=>1);
6262                                 $ltext .= '</span>';
6263                                 $ltext .= esc_html($3, -nbsp=>1);
6264                         } else {
6265                                 $ltext = esc_html($ltext, -nbsp=>1);
6266                         }
6267                         print "<div class=\"pre\">" .
6268                                 $cgi->a({-href => $file_href.'#l'.$lno,
6269                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6270                                 ' ' .  $ltext . "</div>\n";
6271                 }
6272         }
6273         if ($lastfile) {
6274                 print "</td></tr>\n";
6275                 if ($matches > 1000) {
6276                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6277                 }
6278         } else {
6279                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6280         }
6281         close $fd;
6282
6283         print "</table>\n";
6284
6285         git_footer_html();
6286 }
6287
6288 sub git_search_grep_body {
6289         my ($commitlist, $from, $to, $extra) = @_;
6290         $from = 0 unless defined $from;
6291         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6292
6293         print "<table class=\"commit_search\">\n";
6294         my $alternate = 1;
6295         for (my $i = $from; $i <= $to; $i++) {
6296                 my %co = %{$commitlist->[$i]};
6297                 if (!%co) {
6298                         next;
6299                 }
6300                 my $commit = $co{'id'};
6301                 if ($alternate) {
6302                         print "<tr class=\"dark\">\n";
6303                 } else {
6304                         print "<tr class=\"light\">\n";
6305                 }
6306                 $alternate ^= 1;
6307                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6308                       format_author_html('td', \%co, 15, 5) .
6309                       "<td>" .
6310                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6311                                -class => "list subject"},
6312                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6313                 my $comment = $co{'comment'};
6314                 foreach my $line (@$comment) {
6315                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6316                                 my ($lead, $match, $trail) = ($1, $2, $3);
6317                                 $match = chop_str($match, 70, 5, 'center');
6318                                 my $contextlen = int((80 - length($match))/2);
6319                                 $contextlen = 30 if ($contextlen > 30);
6320                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6321                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6322
6323                                 $lead  = esc_html($lead);
6324                                 $match = esc_html($match);
6325                                 $trail = esc_html($trail);
6326
6327                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6328                         }
6329                 }
6330                 print "</td>\n" .
6331                       "<td class=\"link\">" .
6332                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6333                       " | " .
6334                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6335                       " | " .
6336                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6337                 print "</td>\n" .
6338                       "</tr>\n";
6339         }
6340         if (defined $extra) {
6341                 print "<tr>\n" .
6342                       "<td colspan=\"3\">$extra</td>\n" .
6343                       "</tr>\n";
6344         }
6345         print "</table>\n";
6346 }
6347
6348 ## ======================================================================
6349 ## ======================================================================
6350 ## actions
6351
6352 sub git_project_list {
6353         my $order = $input_params{'order'};
6354         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6355                 die_error(400, "Unknown order parameter");
6356         }
6357
6358         my @list = git_get_projects_list($project_filter, $strict_export);
6359         if (!@list) {
6360                 die_error(404, "No projects found");
6361         }
6362
6363         git_header_html();
6364         if (defined $home_text && -f $home_text) {
6365                 print "<div class=\"index_include\">\n";
6366                 insert_file($home_text);
6367                 print "</div>\n";
6368         }
6369
6370         git_project_search_form($searchtext, $search_use_regexp);
6371         git_project_list_body(\@list, $order);
6372         git_footer_html();
6373 }
6374
6375 sub git_forks {
6376         my $order = $input_params{'order'};
6377         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6378                 die_error(400, "Unknown order parameter");
6379         }
6380
6381         my $filter = $project;
6382         $filter =~ s/\.git$//;
6383         my @list = git_get_projects_list($filter);
6384         if (!@list) {
6385                 die_error(404, "No forks found");
6386         }
6387
6388         git_header_html();
6389         git_print_page_nav('','');
6390         git_print_header_div('summary', "$project forks");
6391         git_project_list_body(\@list, $order);
6392         git_footer_html();
6393 }
6394
6395 sub git_project_index {
6396         my @projects = git_get_projects_list($project_filter, $strict_export);
6397         if (!@projects) {
6398                 die_error(404, "No projects found");
6399         }
6400
6401         print $cgi->header(
6402                 -type => 'text/plain',
6403                 -charset => 'utf-8',
6404                 -content_disposition => 'inline; filename="index.aux"');
6405
6406         foreach my $pr (@projects) {
6407                 if (!exists $pr->{'owner'}) {
6408                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6409                 }
6410
6411                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6412                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6413                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6414                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6415                 $path  =~ s/ /\+/g;
6416                 $owner =~ s/ /\+/g;
6417
6418                 print "$path $owner\n";
6419         }
6420 }
6421
6422 sub git_summary {
6423         my $descr = git_get_project_description($project) || "none";
6424         my %co = parse_commit("HEAD");
6425         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6426         my $head = $co{'id'};
6427         my $remote_heads = gitweb_check_feature('remote_heads');
6428
6429         my $owner = git_get_project_owner($project);
6430
6431         my $refs = git_get_references();
6432         # These get_*_list functions return one more to allow us to see if
6433         # there are more ...
6434         my @taglist  = git_get_tags_list(16);
6435         my @headlist = git_get_heads_list(16);
6436         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6437         my @forklist;
6438         my $check_forks = gitweb_check_feature('forks');
6439
6440         if ($check_forks) {
6441                 # find forks of a project
6442                 my $filter = $project;
6443                 $filter =~ s/\.git$//;
6444                 @forklist = git_get_projects_list($filter);
6445                 # filter out forks of forks
6446                 @forklist = filter_forks_from_projects_list(\@forklist)
6447                         if (@forklist);
6448         }
6449
6450         git_header_html();
6451         git_print_page_nav('summary','', $head);
6452
6453         print "<div class=\"title\">&nbsp;</div>\n";
6454         print "<table class=\"projects_list\">\n" .
6455               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6456         unless ($omit_owner) {
6457                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6458         }
6459         if (defined $cd{'rfc2822'}) {
6460                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6461                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6462         }
6463
6464         # use per project git URL list in $projectroot/$project/cloneurl
6465         # or make project git URL from git base URL and project name
6466         my $url_tag = "URL";
6467         my @url_list = git_get_project_url_list($project);
6468         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6469         foreach my $git_url (@url_list) {
6470                 next unless $git_url;
6471                 print format_repo_url($url_tag, $git_url);
6472                 $url_tag = "";
6473         }
6474
6475         # Tag cloud
6476         my $show_ctags = gitweb_check_feature('ctags');
6477         if ($show_ctags) {
6478                 my $ctags = git_get_project_ctags($project);
6479                 if (%$ctags) {
6480                         # without ability to add tags, don't show if there are none
6481                         my $cloud = git_populate_project_tagcloud($ctags);
6482                         print "<tr id=\"metadata_ctags\">" .
6483                               "<td>content tags</td>" .
6484                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6485                               "</tr>\n";
6486                 }
6487         }
6488
6489         print "</table>\n";
6490
6491         # If XSS prevention is on, we don't include README.html.
6492         # TODO: Allow a readme in some safe format.
6493         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6494                 print "<div class=\"title\">readme</div>\n" .
6495                       "<div class=\"readme\">\n";
6496                 insert_file("$projectroot/$project/README.html");
6497                 print "\n</div>\n"; # class="readme"
6498         }
6499
6500         # we need to request one more than 16 (0..15) to check if
6501         # those 16 are all
6502         my @commitlist = $head ? parse_commits($head, 17) : ();
6503         if (@commitlist) {
6504                 git_print_header_div('shortlog');
6505                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6506                                   $#commitlist <=  15 ? undef :
6507                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6508         }
6509
6510         if (@taglist) {
6511                 git_print_header_div('tags');
6512                 git_tags_body(\@taglist, 0, 15,
6513                               $#taglist <=  15 ? undef :
6514                               $cgi->a({-href => href(action=>"tags")}, "..."));
6515         }
6516
6517         if (@headlist) {
6518                 git_print_header_div('heads');
6519                 git_heads_body(\@headlist, $head, 0, 15,
6520                                $#headlist <= 15 ? undef :
6521                                $cgi->a({-href => href(action=>"heads")}, "..."));
6522         }
6523
6524         if (%remotedata) {
6525                 git_print_header_div('remotes');
6526                 git_remotes_body(\%remotedata, 15, $head);
6527         }
6528
6529         if (@forklist) {
6530                 git_print_header_div('forks');
6531                 git_project_list_body(\@forklist, 'age', 0, 15,
6532                                       $#forklist <= 15 ? undef :
6533                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6534                                       'no_header');
6535         }
6536
6537         git_footer_html();
6538 }
6539
6540 sub git_tag {
6541         my %tag = parse_tag($hash);
6542
6543         if (! %tag) {
6544                 die_error(404, "Unknown tag object");
6545         }
6546
6547         my $head = git_get_head_hash($project);
6548         git_header_html();
6549         git_print_page_nav('','', $head,undef,$head);
6550         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6551         print "<div class=\"title_text\">\n" .
6552               "<table class=\"object_header\">\n" .
6553               "<tr>\n" .
6554               "<td>object</td>\n" .
6555               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6556                                $tag{'object'}) . "</td>\n" .
6557               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6558                                               $tag{'type'}) . "</td>\n" .
6559               "</tr>\n";
6560         if (defined($tag{'author'})) {
6561                 git_print_authorship_rows(\%tag, 'author');
6562         }
6563         print "</table>\n\n" .
6564               "</div>\n";
6565         print "<div class=\"page_body\">";
6566         my $comment = $tag{'comment'};
6567         foreach my $line (@$comment) {
6568                 chomp $line;
6569                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6570         }
6571         print "</div>\n";
6572         git_footer_html();
6573 }
6574
6575 sub git_blame_common {
6576         my $format = shift || 'porcelain';
6577         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6578                 $format = 'incremental';
6579                 $action = 'blame_incremental'; # for page title etc
6580         }
6581
6582         # permissions
6583         gitweb_check_feature('blame')
6584                 or die_error(403, "Blame view not allowed");
6585
6586         # error checking
6587         die_error(400, "No file name given") unless $file_name;
6588         $hash_base ||= git_get_head_hash($project);
6589         die_error(404, "Couldn't find base commit") unless $hash_base;
6590         my %co = parse_commit($hash_base)
6591                 or die_error(404, "Commit not found");
6592         my $ftype = "blob";
6593         if (!defined $hash) {
6594                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6595                         or die_error(404, "Error looking up file");
6596         } else {
6597                 $ftype = git_get_type($hash);
6598                 if ($ftype !~ "blob") {
6599                         die_error(400, "Object is not a blob");
6600                 }
6601         }
6602
6603         my $fd;
6604         if ($format eq 'incremental') {
6605                 # get file contents (as base)
6606                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6607                         or die_error(500, "Open git-cat-file failed");
6608         } elsif ($format eq 'data') {
6609                 # run git-blame --incremental
6610                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6611                         $hash_base, "--", $file_name
6612                         or die_error(500, "Open git-blame --incremental failed");
6613         } else {
6614                 # run git-blame --porcelain
6615                 open $fd, "-|", git_cmd(), "blame", '-p',
6616                         $hash_base, '--', $file_name
6617                         or die_error(500, "Open git-blame --porcelain failed");
6618         }
6619
6620         # incremental blame data returns early
6621         if ($format eq 'data') {
6622                 print $cgi->header(
6623                         -type=>"text/plain", -charset => "utf-8",
6624                         -status=> "200 OK");
6625                 local $| = 1; # output autoflush
6626                 while (my $line = <$fd>) {
6627                         print to_utf8($line);
6628                 }
6629                 close $fd
6630                         or print "ERROR $!\n";
6631
6632                 print 'END';
6633                 if (defined $t0 && gitweb_check_feature('timed')) {
6634                         print ' '.
6635                               tv_interval($t0, [ gettimeofday() ]).
6636                               ' '.$number_of_git_cmds;
6637                 }
6638                 print "\n";
6639
6640                 return;
6641         }
6642
6643         # page header
6644         git_header_html();
6645         my $formats_nav =
6646                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6647                         "blob") .
6648                 " | ";
6649         if ($format eq 'incremental') {
6650                 $formats_nav .=
6651                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6652                                 "blame") . " (non-incremental)";
6653         } else {
6654                 $formats_nav .=
6655                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6656                                 "blame") . " (incremental)";
6657         }
6658         $formats_nav .=
6659                 " | " .
6660                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6661                         "history") .
6662                 " | " .
6663                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6664                         "HEAD");
6665         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6666         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6667         git_print_page_path($file_name, $ftype, $hash_base);
6668
6669         # page body
6670         if ($format eq 'incremental') {
6671                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6672                       "This page requires JavaScript to run.\n Use ".
6673                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6674                               'this page').
6675                       " instead.\n".
6676                       "</b></center></div>\n</noscript>\n";
6677
6678                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6679         }
6680
6681         print qq!<div class="page_body">\n!;
6682         print qq!<div id="progress_info">... / ...</div>\n!
6683                 if ($format eq 'incremental');
6684         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6685               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6686               qq!<thead>\n!.
6687               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6688               qq!</thead>\n!.
6689               qq!<tbody>\n!;
6690
6691         my @rev_color = qw(light dark);
6692         my $num_colors = scalar(@rev_color);
6693         my $current_color = 0;
6694
6695         if ($format eq 'incremental') {
6696                 my $color_class = $rev_color[$current_color];
6697
6698                 #contents of a file
6699                 my $linenr = 0;
6700         LINE:
6701                 while (my $line = <$fd>) {
6702                         chomp $line;
6703                         $linenr++;
6704
6705                         print qq!<tr id="l$linenr" class="$color_class">!.
6706                               qq!<td class="sha1"><a href=""> </a></td>!.
6707                               qq!<td class="linenr">!.
6708                               qq!<a class="linenr" href="">$linenr</a></td>!;
6709                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6710                         print qq!</tr>\n!;
6711                 }
6712
6713         } else { # porcelain, i.e. ordinary blame
6714                 my %metainfo = (); # saves information about commits
6715
6716                 # blame data
6717         LINE:
6718                 while (my $line = <$fd>) {
6719                         chomp $line;
6720                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6721                         # no <lines in group> for subsequent lines in group of lines
6722                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6723                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6724                         if (!exists $metainfo{$full_rev}) {
6725                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6726                         }
6727                         my $meta = $metainfo{$full_rev};
6728                         my $data;
6729                         while ($data = <$fd>) {
6730                                 chomp $data;
6731                                 last if ($data =~ s/^\t//); # contents of line
6732                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6733                                         $meta->{$1} = $2 unless exists $meta->{$1};
6734                                 }
6735                                 if ($data =~ /^previous /) {
6736                                         $meta->{'nprevious'}++;
6737                                 }
6738                         }
6739                         my $short_rev = substr($full_rev, 0, 8);
6740                         my $author = $meta->{'author'};
6741                         my %date =
6742                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6743                         my $date = $date{'iso-tz'};
6744                         if ($group_size) {
6745                                 $current_color = ($current_color + 1) % $num_colors;
6746                         }
6747                         my $tr_class = $rev_color[$current_color];
6748                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6749                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6750                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6751                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6752                         if ($group_size) {
6753                                 print "<td class=\"sha1\"";
6754                                 print " title=\"". esc_html($author) . ", $date\"";
6755                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6756                                 print ">";
6757                                 print $cgi->a({-href => href(action=>"commit",
6758                                                              hash=>$full_rev,
6759                                                              file_name=>$file_name)},
6760                                               esc_html($short_rev));
6761                                 if ($group_size >= 2) {
6762                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6763                                         if (@author_initials) {
6764                                                 print "<br />" .
6765                                                       esc_html(join('', @author_initials));
6766                                                 #           or join('.', ...)
6767                                         }
6768                                 }
6769                                 print "</td>\n";
6770                         }
6771                         # 'previous' <sha1 of parent commit> <filename at commit>
6772                         if (exists $meta->{'previous'} &&
6773                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6774                                 $meta->{'parent'} = $1;
6775                                 $meta->{'file_parent'} = unquote($2);
6776                         }
6777                         my $linenr_commit =
6778                                 exists($meta->{'parent'}) ?
6779                                 $meta->{'parent'} : $full_rev;
6780                         my $linenr_filename =
6781                                 exists($meta->{'file_parent'}) ?
6782                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6783                         my $blamed = href(action => 'blame',
6784                                           file_name => $linenr_filename,
6785                                           hash_base => $linenr_commit);
6786                         print "<td class=\"linenr\">";
6787                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6788                                         -class => "linenr" },
6789                                       esc_html($lineno));
6790                         print "</td>";
6791                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6792                         print "</tr>\n";
6793                 } # end while
6794
6795         }
6796
6797         # footer
6798         print "</tbody>\n".
6799               "</table>\n"; # class="blame"
6800         print "</div>\n";   # class="blame_body"
6801         close $fd
6802                 or print "Reading blob failed\n";
6803
6804         git_footer_html();
6805 }
6806
6807 sub git_blame {
6808         git_blame_common();
6809 }
6810
6811 sub git_blame_incremental {
6812         git_blame_common('incremental');
6813 }
6814
6815 sub git_blame_data {
6816         git_blame_common('data');
6817 }
6818
6819 sub git_tags {
6820         my $head = git_get_head_hash($project);
6821         git_header_html();
6822         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6823         git_print_header_div('summary', $project);
6824
6825         my @tagslist = git_get_tags_list();
6826         if (@tagslist) {
6827                 git_tags_body(\@tagslist);
6828         }
6829         git_footer_html();
6830 }
6831
6832 sub git_heads {
6833         my $head = git_get_head_hash($project);
6834         git_header_html();
6835         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6836         git_print_header_div('summary', $project);
6837
6838         my @headslist = git_get_heads_list();
6839         if (@headslist) {
6840                 git_heads_body(\@headslist, $head);
6841         }
6842         git_footer_html();
6843 }
6844
6845 # used both for single remote view and for list of all the remotes
6846 sub git_remotes {
6847         gitweb_check_feature('remote_heads')
6848                 or die_error(403, "Remote heads view is disabled");
6849
6850         my $head = git_get_head_hash($project);
6851         my $remote = $input_params{'hash'};
6852
6853         my $remotedata = git_get_remotes_list($remote);
6854         die_error(500, "Unable to get remote information") unless defined $remotedata;
6855
6856         unless (%$remotedata) {
6857                 die_error(404, defined $remote ?
6858                         "Remote $remote not found" :
6859                         "No remotes found");
6860         }
6861
6862         git_header_html(undef, undef, -action_extra => $remote);
6863         git_print_page_nav('', '',  $head, undef, $head,
6864                 format_ref_views($remote ? '' : 'remotes'));
6865
6866         fill_remote_heads($remotedata);
6867         if (defined $remote) {
6868                 git_print_header_div('remotes', "$remote remote for $project");
6869                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6870         } else {
6871                 git_print_header_div('summary', "$project remotes");
6872                 git_remotes_body($remotedata, undef, $head);
6873         }
6874
6875         git_footer_html();
6876 }
6877
6878 sub git_blob_plain {
6879         my $type = shift;
6880         my $expires;
6881
6882         if (!defined $hash) {
6883                 if (defined $file_name) {
6884                         my $base = $hash_base || git_get_head_hash($project);
6885                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6886                                 or die_error(404, "Cannot find file");
6887                 } else {
6888                         die_error(400, "No file name defined");
6889                 }
6890         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6891                 # blobs defined by non-textual hash id's can be cached
6892                 $expires = "+1d";
6893         }
6894
6895         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6896                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6897
6898         # content-type (can include charset)
6899         $type = blob_contenttype($fd, $file_name, $type);
6900
6901         # "save as" filename, even when no $file_name is given
6902         my $save_as = "$hash";
6903         if (defined $file_name) {
6904                 $save_as = $file_name;
6905         } elsif ($type =~ m/^text\//) {
6906                 $save_as .= '.txt';
6907         }
6908
6909         # With XSS prevention on, blobs of all types except a few known safe
6910         # ones are served with "Content-Disposition: attachment" to make sure
6911         # they don't run in our security domain.  For certain image types,
6912         # blob view writes an <img> tag referring to blob_plain view, and we
6913         # want to be sure not to break that by serving the image as an
6914         # attachment (though Firefox 3 doesn't seem to care).
6915         my $sandbox = $prevent_xss &&
6916                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6917
6918         # serve text/* as text/plain
6919         if ($prevent_xss &&
6920             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6921              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6922                 my $rest = $1;
6923                 $rest = defined $rest ? $rest : '';
6924                 $type = "text/plain$rest";
6925         }
6926
6927         print $cgi->header(
6928                 -type => $type,
6929                 -expires => $expires,
6930                 -content_disposition =>
6931                         ($sandbox ? 'attachment' : 'inline')
6932                         . '; filename="' . $save_as . '"');
6933         local $/ = undef;
6934         binmode STDOUT, ':raw';
6935         print <$fd>;
6936         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6937         close $fd;
6938 }
6939
6940 sub git_blob {
6941         my $expires;
6942
6943         if (!defined $hash) {
6944                 if (defined $file_name) {
6945                         my $base = $hash_base || git_get_head_hash($project);
6946                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6947                                 or die_error(404, "Cannot find file");
6948                 } else {
6949                         die_error(400, "No file name defined");
6950                 }
6951         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6952                 # blobs defined by non-textual hash id's can be cached
6953                 $expires = "+1d";
6954         }
6955
6956         my $have_blame = gitweb_check_feature('blame');
6957         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6958                 or die_error(500, "Couldn't cat $file_name, $hash");
6959         my $mimetype = blob_mimetype($fd, $file_name);
6960         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6961         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6962                 close $fd;
6963                 return git_blob_plain($mimetype);
6964         }
6965         # we can have blame only for text/* mimetype
6966         $have_blame &&= ($mimetype =~ m!^text/!);
6967
6968         my $highlight = gitweb_check_feature('highlight');
6969         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6970         $fd = run_highlighter($fd, $highlight, $syntax)
6971                 if $syntax;
6972
6973         git_header_html(undef, $expires);
6974         my $formats_nav = '';
6975         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6976                 if (defined $file_name) {
6977                         if ($have_blame) {
6978                                 $formats_nav .=
6979                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6980                                                 "blame") .
6981                                         " | ";
6982                         }
6983                         $formats_nav .=
6984                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6985                                         "history") .
6986                                 " | " .
6987                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6988                                         "raw") .
6989                                 " | " .
6990                                 $cgi->a({-href => href(action=>"blob",
6991                                                        hash_base=>"HEAD", file_name=>$file_name)},
6992                                         "HEAD");
6993                 } else {
6994                         $formats_nav .=
6995                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6996                                         "raw");
6997                 }
6998                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6999                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7000         } else {
7001                 print "<div class=\"page_nav\">\n" .
7002                       "<br/><br/></div>\n" .
7003                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7004         }
7005         git_print_page_path($file_name, "blob", $hash_base);
7006         print "<div class=\"page_body\">\n";
7007         if ($mimetype =~ m!^image/!) {
7008                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7009                 if ($file_name) {
7010                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7011                 }
7012                 print qq! src="! .
7013                       href(action=>"blob_plain", hash=>$hash,
7014                            hash_base=>$hash_base, file_name=>$file_name) .
7015                       qq!" />\n!;
7016         } else {
7017                 my $nr;
7018                 while (my $line = <$fd>) {
7019                         chomp $line;
7020                         $nr++;
7021                         $line = untabify($line);
7022                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7023                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7024                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7025                 }
7026         }
7027         close $fd
7028                 or print "Reading blob failed.\n";
7029         print "</div>";
7030         git_footer_html();
7031 }
7032
7033 sub git_tree {
7034         if (!defined $hash_base) {
7035                 $hash_base = "HEAD";
7036         }
7037         if (!defined $hash) {
7038                 if (defined $file_name) {
7039                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7040                 } else {
7041                         $hash = $hash_base;
7042                 }
7043         }
7044         die_error(404, "No such tree") unless defined($hash);
7045
7046         my $show_sizes = gitweb_check_feature('show-sizes');
7047         my $have_blame = gitweb_check_feature('blame');
7048
7049         my @entries = ();
7050         {
7051                 local $/ = "\0";
7052                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7053                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7054                         or die_error(500, "Open git-ls-tree failed");
7055                 @entries = map { chomp; $_ } <$fd>;
7056                 close $fd
7057                         or die_error(404, "Reading tree failed");
7058         }
7059
7060         my $refs = git_get_references();
7061         my $ref = format_ref_marker($refs, $hash_base);
7062         git_header_html();
7063         my $basedir = '';
7064         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7065                 my @views_nav = ();
7066                 if (defined $file_name) {
7067                         push @views_nav,
7068                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7069                                         "history"),
7070                                 $cgi->a({-href => href(action=>"tree",
7071                                                        hash_base=>"HEAD", file_name=>$file_name)},
7072                                         "HEAD"),
7073                 }
7074                 my $snapshot_links = format_snapshot_links($hash);
7075                 if (defined $snapshot_links) {
7076                         # FIXME: Should be available when we have no hash base as well.
7077                         push @views_nav, $snapshot_links;
7078                 }
7079                 git_print_page_nav('tree','', $hash_base, undef, undef,
7080                                    join(' | ', @views_nav));
7081                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7082         } else {
7083                 undef $hash_base;
7084                 print "<div class=\"page_nav\">\n";
7085                 print "<br/><br/></div>\n";
7086                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7087         }
7088         if (defined $file_name) {
7089                 $basedir = $file_name;
7090                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7091                         $basedir .= '/';
7092                 }
7093                 git_print_page_path($file_name, 'tree', $hash_base);
7094         }
7095         print "<div class=\"page_body\">\n";
7096         print "<table class=\"tree\">\n";
7097         my $alternate = 1;
7098         # '..' (top directory) link if possible
7099         if (defined $hash_base &&
7100             defined $file_name && $file_name =~ m![^/]+$!) {
7101                 if ($alternate) {
7102                         print "<tr class=\"dark\">\n";
7103                 } else {
7104                         print "<tr class=\"light\">\n";
7105                 }
7106                 $alternate ^= 1;
7107
7108                 my $up = $file_name;
7109                 $up =~ s!/?[^/]+$!!;
7110                 undef $up unless $up;
7111                 # based on git_print_tree_entry
7112                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7113                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7114                 print '<td class="list">';
7115                 print $cgi->a({-href => href(action=>"tree",
7116                                              hash_base=>$hash_base,
7117                                              file_name=>$up)},
7118                               "..");
7119                 print "</td>\n";
7120                 print "<td class=\"link\"></td>\n";
7121
7122                 print "</tr>\n";
7123         }
7124         foreach my $line (@entries) {
7125                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7126
7127                 if ($alternate) {
7128                         print "<tr class=\"dark\">\n";
7129                 } else {
7130                         print "<tr class=\"light\">\n";
7131                 }
7132                 $alternate ^= 1;
7133
7134                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7135
7136                 print "</tr>\n";
7137         }
7138         print "</table>\n" .
7139               "</div>";
7140         git_footer_html();
7141 }
7142
7143 sub snapshot_name {
7144         my ($project, $hash) = @_;
7145
7146         # path/to/project.git  -> project
7147         # path/to/project/.git -> project
7148         my $name = to_utf8($project);
7149         $name =~ s,([^/])/*\.git$,$1,;
7150         $name = basename($name);
7151         # sanitize name
7152         $name =~ s/[[:cntrl:]]/?/g;
7153
7154         my $ver = $hash;
7155         if ($hash =~ /^[0-9a-fA-F]+$/) {
7156                 # shorten SHA-1 hash
7157                 my $full_hash = git_get_full_hash($project, $hash);
7158                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7159                         $ver = git_get_short_hash($project, $hash);
7160                 }
7161         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7162                 # tags don't need shortened SHA-1 hash
7163                 $ver = $1;
7164         } else {
7165                 # branches and other need shortened SHA-1 hash
7166                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7167                         $ver = $1;
7168                 }
7169                 $ver .= '-' . git_get_short_hash($project, $hash);
7170         }
7171         # in case of hierarchical branch names
7172         $ver =~ s!/!.!g;
7173
7174         # name = project-version_string
7175         $name = "$name-$ver";
7176
7177         return wantarray ? ($name, $name) : $name;
7178 }
7179
7180 sub exit_if_unmodified_since {
7181         my ($latest_epoch) = @_;
7182         our $cgi;
7183
7184         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7185         if (defined $if_modified) {
7186                 my $since;
7187                 if (eval { require HTTP::Date; 1; }) {
7188                         $since = HTTP::Date::str2time($if_modified);
7189                 } elsif (eval { require Time::ParseDate; 1; }) {
7190                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7191                 }
7192                 if (defined $since && $latest_epoch <= $since) {
7193                         my %latest_date = parse_date($latest_epoch);
7194                         print $cgi->header(
7195                                 -last_modified => $latest_date{'rfc2822'},
7196                                 -status => '304 Not Modified');
7197                         goto DONE_GITWEB;
7198                 }
7199         }
7200 }
7201
7202 sub git_snapshot {
7203         my $format = $input_params{'snapshot_format'};
7204         if (!@snapshot_fmts) {
7205                 die_error(403, "Snapshots not allowed");
7206         }
7207         # default to first supported snapshot format
7208         $format ||= $snapshot_fmts[0];
7209         if ($format !~ m/^[a-z0-9]+$/) {
7210                 die_error(400, "Invalid snapshot format parameter");
7211         } elsif (!exists($known_snapshot_formats{$format})) {
7212                 die_error(400, "Unknown snapshot format");
7213         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7214                 die_error(403, "Snapshot format not allowed");
7215         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7216                 die_error(403, "Unsupported snapshot format");
7217         }
7218
7219         my $type = git_get_type("$hash^{}");
7220         if (!$type) {
7221                 die_error(404, 'Object does not exist');
7222         }  elsif ($type eq 'blob') {
7223                 die_error(400, 'Object is not a tree-ish');
7224         }
7225
7226         my ($name, $prefix) = snapshot_name($project, $hash);
7227         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7228
7229         my %co = parse_commit($hash);
7230         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7231
7232         my $cmd = quote_command(
7233                 git_cmd(), 'archive',
7234                 "--format=$known_snapshot_formats{$format}{'format'}",
7235                 "--prefix=$prefix/", $hash);
7236         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7237                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7238         }
7239
7240         $filename =~ s/(["\\])/\\$1/g;
7241         my %latest_date;
7242         if (%co) {
7243                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7244         }
7245
7246         print $cgi->header(
7247                 -type => $known_snapshot_formats{$format}{'type'},
7248                 -content_disposition => 'inline; filename="' . $filename . '"',
7249                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7250                 -status => '200 OK');
7251
7252         open my $fd, "-|", $cmd
7253                 or die_error(500, "Execute git-archive failed");
7254         binmode STDOUT, ':raw';
7255         print <$fd>;
7256         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7257         close $fd;
7258 }
7259
7260 sub git_log_generic {
7261         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7262
7263         my $head = git_get_head_hash($project);
7264         if (!defined $base) {
7265                 $base = $head;
7266         }
7267         if (!defined $page) {
7268                 $page = 0;
7269         }
7270         my $refs = git_get_references();
7271
7272         my $commit_hash = $base;
7273         if (defined $parent) {
7274                 $commit_hash = "$parent..$base";
7275         }
7276         my @commitlist =
7277                 parse_commits($commit_hash, 101, (100 * $page),
7278                               defined $file_name ? ($file_name, "--full-history") : ());
7279
7280         my $ftype;
7281         if (!defined $file_hash && defined $file_name) {
7282                 # some commits could have deleted file in question,
7283                 # and not have it in tree, but one of them has to have it
7284                 for (my $i = 0; $i < @commitlist; $i++) {
7285                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7286                         last if defined $file_hash;
7287                 }
7288         }
7289         if (defined $file_hash) {
7290                 $ftype = git_get_type($file_hash);
7291         }
7292         if (defined $file_name && !defined $ftype) {
7293                 die_error(500, "Unknown type of object");
7294         }
7295         my %co;
7296         if (defined $file_name) {
7297                 %co = parse_commit($base)
7298                         or die_error(404, "Unknown commit object");
7299         }
7300
7301
7302         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7303         my $next_link = '';
7304         if ($#commitlist >= 100) {
7305                 $next_link =
7306                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7307                                  -accesskey => "n", -title => "Alt-n"}, "next");
7308         }
7309         my $patch_max = gitweb_get_feature('patches');
7310         if ($patch_max && !defined $file_name) {
7311                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7312                         $paging_nav .= " &sdot; " .
7313                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7314                                         "patches");
7315                 }
7316         }
7317
7318         git_header_html();
7319         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7320         if (defined $file_name) {
7321                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7322         } else {
7323                 git_print_header_div('summary', $project)
7324         }
7325         git_print_page_path($file_name, $ftype, $hash_base)
7326                 if (defined $file_name);
7327
7328         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7329                      $file_name, $file_hash, $ftype);
7330
7331         git_footer_html();
7332 }
7333
7334 sub git_log {
7335         git_log_generic('log', \&git_log_body,
7336                         $hash, $hash_parent);
7337 }
7338
7339 sub git_commit {
7340         $hash ||= $hash_base || "HEAD";
7341         my %co = parse_commit($hash)
7342             or die_error(404, "Unknown commit object");
7343
7344         my $parent  = $co{'parent'};
7345         my $parents = $co{'parents'}; # listref
7346
7347         # we need to prepare $formats_nav before any parameter munging
7348         my $formats_nav;
7349         if (!defined $parent) {
7350                 # --root commitdiff
7351                 $formats_nav .= '(initial)';
7352         } elsif (@$parents == 1) {
7353                 # single parent commit
7354                 $formats_nav .=
7355                         '(parent: ' .
7356                         $cgi->a({-href => href(action=>"commit",
7357                                                hash=>$parent)},
7358                                 esc_html(substr($parent, 0, 7))) .
7359                         ')';
7360         } else {
7361                 # merge commit
7362                 $formats_nav .=
7363                         '(merge: ' .
7364                         join(' ', map {
7365                                 $cgi->a({-href => href(action=>"commit",
7366                                                        hash=>$_)},
7367                                         esc_html(substr($_, 0, 7)));
7368                         } @$parents ) .
7369                         ')';
7370         }
7371         if (gitweb_check_feature('patches') && @$parents <= 1) {
7372                 $formats_nav .= " | " .
7373                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7374                                 "patch");
7375         }
7376
7377         if (!defined $parent) {
7378                 $parent = "--root";
7379         }
7380         my @difftree;
7381         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7382                 @diff_opts,
7383                 (@$parents <= 1 ? $parent : '-c'),
7384                 $hash, "--"
7385                 or die_error(500, "Open git-diff-tree failed");
7386         @difftree = map { chomp; $_ } <$fd>;
7387         close $fd or die_error(404, "Reading git-diff-tree failed");
7388
7389         # non-textual hash id's can be cached
7390         my $expires;
7391         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7392                 $expires = "+1d";
7393         }
7394         my $refs = git_get_references();
7395         my $ref = format_ref_marker($refs, $co{'id'});
7396
7397         git_header_html(undef, $expires);
7398         git_print_page_nav('commit', '',
7399                            $hash, $co{'tree'}, $hash,
7400                            $formats_nav);
7401
7402         if (defined $co{'parent'}) {
7403                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7404         } else {
7405                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7406         }
7407         print "<div class=\"title_text\">\n" .
7408               "<table class=\"object_header\">\n";
7409         git_print_authorship_rows(\%co);
7410         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7411         print "<tr>" .
7412               "<td>tree</td>" .
7413               "<td class=\"sha1\">" .
7414               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7415                        class => "list"}, $co{'tree'}) .
7416               "</td>" .
7417               "<td class=\"link\">" .
7418               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7419                       "tree");
7420         my $snapshot_links = format_snapshot_links($hash);
7421         if (defined $snapshot_links) {
7422                 print " | " . $snapshot_links;
7423         }
7424         print "</td>" .
7425               "</tr>\n";
7426
7427         foreach my $par (@$parents) {
7428                 print "<tr>" .
7429                       "<td>parent</td>" .
7430                       "<td class=\"sha1\">" .
7431                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7432                                class => "list"}, $par) .
7433                       "</td>" .
7434                       "<td class=\"link\">" .
7435                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7436                       " | " .
7437                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7438                       "</td>" .
7439                       "</tr>\n";
7440         }
7441         print "</table>".
7442               "</div>\n";
7443
7444         print "<div class=\"page_body\">\n";
7445         git_print_log($co{'comment'});
7446         print "</div>\n";
7447
7448         git_difftree_body(\@difftree, $hash, @$parents);
7449
7450         git_footer_html();
7451 }
7452
7453 sub git_object {
7454         # object is defined by:
7455         # - hash or hash_base alone
7456         # - hash_base and file_name
7457         my $type;
7458
7459         # - hash or hash_base alone
7460         if ($hash || ($hash_base && !defined $file_name)) {
7461                 my $object_id = $hash || $hash_base;
7462
7463                 open my $fd, "-|", quote_command(
7464                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7465                         or die_error(404, "Object does not exist");
7466                 $type = <$fd>;
7467                 chomp $type;
7468                 close $fd
7469                         or die_error(404, "Object does not exist");
7470
7471         # - hash_base and file_name
7472         } elsif ($hash_base && defined $file_name) {
7473                 $file_name =~ s,/+$,,;
7474
7475                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7476                         or die_error(404, "Base object does not exist");
7477
7478                 # here errors should not hapen
7479                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7480                         or die_error(500, "Open git-ls-tree failed");
7481                 my $line = <$fd>;
7482                 close $fd;
7483
7484                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7485                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7486                         die_error(404, "File or directory for given base does not exist");
7487                 }
7488                 $type = $2;
7489                 $hash = $3;
7490         } else {
7491                 die_error(400, "Not enough information to find object");
7492         }
7493
7494         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7495                                           hash=>$hash, hash_base=>$hash_base,
7496                                           file_name=>$file_name),
7497                              -status => '302 Found');
7498 }
7499
7500 sub git_blobdiff {
7501         my $format = shift || 'html';
7502         my $diff_style = $input_params{'diff_style'} || 'inline';
7503
7504         my $fd;
7505         my @difftree;
7506         my %diffinfo;
7507         my $expires;
7508
7509         # preparing $fd and %diffinfo for git_patchset_body
7510         # new style URI
7511         if (defined $hash_base && defined $hash_parent_base) {
7512                 if (defined $file_name) {
7513                         # read raw output
7514                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7515                                 $hash_parent_base, $hash_base,
7516                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7517                                 or die_error(500, "Open git-diff-tree failed");
7518                         @difftree = map { chomp; $_ } <$fd>;
7519                         close $fd
7520                                 or die_error(404, "Reading git-diff-tree failed");
7521                         @difftree
7522                                 or die_error(404, "Blob diff not found");
7523
7524                 } elsif (defined $hash &&
7525                          $hash =~ /[0-9a-fA-F]{40}/) {
7526                         # try to find filename from $hash
7527
7528                         # read filtered raw output
7529                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7530                                 $hash_parent_base, $hash_base, "--"
7531                                 or die_error(500, "Open git-diff-tree failed");
7532                         @difftree =
7533                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7534                                 # $hash == to_id
7535                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7536                                 map { chomp; $_ } <$fd>;
7537                         close $fd
7538                                 or die_error(404, "Reading git-diff-tree failed");
7539                         @difftree
7540                                 or die_error(404, "Blob diff not found");
7541
7542                 } else {
7543                         die_error(400, "Missing one of the blob diff parameters");
7544                 }
7545
7546                 if (@difftree > 1) {
7547                         die_error(400, "Ambiguous blob diff specification");
7548                 }
7549
7550                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7551                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7552                 $file_name   ||= $diffinfo{'to_file'};
7553
7554                 $hash_parent ||= $diffinfo{'from_id'};
7555                 $hash        ||= $diffinfo{'to_id'};
7556
7557                 # non-textual hash id's can be cached
7558                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7559                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7560                         $expires = '+1d';
7561                 }
7562
7563                 # open patch output
7564                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7565                         '-p', ($format eq 'html' ? "--full-index" : ()),
7566                         $hash_parent_base, $hash_base,
7567                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7568                         or die_error(500, "Open git-diff-tree failed");
7569         }
7570
7571         # old/legacy style URI -- not generated anymore since 1.4.3.
7572         if (!%diffinfo) {
7573                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7574         }
7575
7576         # header
7577         if ($format eq 'html') {
7578                 my $formats_nav =
7579                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7580                                 "raw");
7581                 $formats_nav .= diff_style_nav($diff_style);
7582                 git_header_html(undef, $expires);
7583                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7584                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7585                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7586                 } else {
7587                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7588                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7589                 }
7590                 if (defined $file_name) {
7591                         git_print_page_path($file_name, "blob", $hash_base);
7592                 } else {
7593                         print "<div class=\"page_path\"></div>\n";
7594                 }
7595
7596         } elsif ($format eq 'plain') {
7597                 print $cgi->header(
7598                         -type => 'text/plain',
7599                         -charset => 'utf-8',
7600                         -expires => $expires,
7601                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7602
7603                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7604
7605         } else {
7606                 die_error(400, "Unknown blobdiff format");
7607         }
7608
7609         # patch
7610         if ($format eq 'html') {
7611                 print "<div class=\"page_body\">\n";
7612
7613                 git_patchset_body($fd, $diff_style,
7614                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7615                 close $fd;
7616
7617                 print "</div>\n"; # class="page_body"
7618                 git_footer_html();
7619
7620         } else {
7621                 while (my $line = <$fd>) {
7622                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7623                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7624
7625                         print $line;
7626
7627                         last if $line =~ m!^\+\+\+!;
7628                 }
7629                 local $/ = undef;
7630                 print <$fd>;
7631                 close $fd;
7632         }
7633 }
7634
7635 sub git_blobdiff_plain {
7636         git_blobdiff('plain');
7637 }
7638
7639 # assumes that it is added as later part of already existing navigation,
7640 # so it returns "| foo | bar" rather than just "foo | bar"
7641 sub diff_style_nav {
7642         my ($diff_style, $is_combined) = @_;
7643         $diff_style ||= 'inline';
7644
7645         return "" if ($is_combined);
7646
7647         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7648         my %styles = @styles;
7649         @styles =
7650                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7651
7652         return join '',
7653                 map { " | ".$_ }
7654                 map {
7655                         $_ eq $diff_style ? $styles{$_} :
7656                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7657                 } @styles;
7658 }
7659
7660 sub git_commitdiff {
7661         my %params = @_;
7662         my $format = $params{-format} || 'html';
7663         my $diff_style = $input_params{'diff_style'} || 'inline';
7664
7665         my ($patch_max) = gitweb_get_feature('patches');
7666         if ($format eq 'patch') {
7667                 die_error(403, "Patch view not allowed") unless $patch_max;
7668         }
7669
7670         $hash ||= $hash_base || "HEAD";
7671         my %co = parse_commit($hash)
7672             or die_error(404, "Unknown commit object");
7673
7674         # choose format for commitdiff for merge
7675         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7676                 $hash_parent = '--cc';
7677         }
7678         # we need to prepare $formats_nav before almost any parameter munging
7679         my $formats_nav;
7680         if ($format eq 'html') {
7681                 $formats_nav =
7682                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7683                                 "raw");
7684                 if ($patch_max && @{$co{'parents'}} <= 1) {
7685                         $formats_nav .= " | " .
7686                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7687                                         "patch");
7688                 }
7689                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7690
7691                 if (defined $hash_parent &&
7692                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7693                         # commitdiff with two commits given
7694                         my $hash_parent_short = $hash_parent;
7695                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7696                                 $hash_parent_short = substr($hash_parent, 0, 7);
7697                         }
7698                         $formats_nav .=
7699                                 ' (from';
7700                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7701                                 if ($co{'parents'}[$i] eq $hash_parent) {
7702                                         $formats_nav .= ' parent ' . ($i+1);
7703                                         last;
7704                                 }
7705                         }
7706                         $formats_nav .= ': ' .
7707                                 $cgi->a({-href => href(-replay=>1,
7708                                                        hash=>$hash_parent, hash_base=>undef)},
7709                                         esc_html($hash_parent_short)) .
7710                                 ')';
7711                 } elsif (!$co{'parent'}) {
7712                         # --root commitdiff
7713                         $formats_nav .= ' (initial)';
7714                 } elsif (scalar @{$co{'parents'}} == 1) {
7715                         # single parent commit
7716                         $formats_nav .=
7717                                 ' (parent: ' .
7718                                 $cgi->a({-href => href(-replay=>1,
7719                                                        hash=>$co{'parent'}, hash_base=>undef)},
7720                                         esc_html(substr($co{'parent'}, 0, 7))) .
7721                                 ')';
7722                 } else {
7723                         # merge commit
7724                         if ($hash_parent eq '--cc') {
7725                                 $formats_nav .= ' | ' .
7726                                         $cgi->a({-href => href(-replay=>1,
7727                                                                hash=>$hash, hash_parent=>'-c')},
7728                                                 'combined');
7729                         } else { # $hash_parent eq '-c'
7730                                 $formats_nav .= ' | ' .
7731                                         $cgi->a({-href => href(-replay=>1,
7732                                                                hash=>$hash, hash_parent=>'--cc')},
7733                                                 'compact');
7734                         }
7735                         $formats_nav .=
7736                                 ' (merge: ' .
7737                                 join(' ', map {
7738                                         $cgi->a({-href => href(-replay=>1,
7739                                                                hash=>$_, hash_base=>undef)},
7740                                                 esc_html(substr($_, 0, 7)));
7741                                 } @{$co{'parents'}} ) .
7742                                 ')';
7743                 }
7744         }
7745
7746         my $hash_parent_param = $hash_parent;
7747         if (!defined $hash_parent_param) {
7748                 # --cc for multiple parents, --root for parentless
7749                 $hash_parent_param =
7750                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7751         }
7752
7753         # read commitdiff
7754         my $fd;
7755         my @difftree;
7756         if ($format eq 'html') {
7757                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7758                         "--no-commit-id", "--patch-with-raw", "--full-index",
7759                         $hash_parent_param, $hash, "--"
7760                         or die_error(500, "Open git-diff-tree failed");
7761
7762                 while (my $line = <$fd>) {
7763                         chomp $line;
7764                         # empty line ends raw part of diff-tree output
7765                         last unless $line;
7766                         push @difftree, scalar parse_difftree_raw_line($line);
7767                 }
7768
7769         } elsif ($format eq 'plain') {
7770                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7771                         '-p', $hash_parent_param, $hash, "--"
7772                         or die_error(500, "Open git-diff-tree failed");
7773         } elsif ($format eq 'patch') {
7774                 # For commit ranges, we limit the output to the number of
7775                 # patches specified in the 'patches' feature.
7776                 # For single commits, we limit the output to a single patch,
7777                 # diverging from the git-format-patch default.
7778                 my @commit_spec = ();
7779                 if ($hash_parent) {
7780                         if ($patch_max > 0) {
7781                                 push @commit_spec, "-$patch_max";
7782                         }
7783                         push @commit_spec, '-n', "$hash_parent..$hash";
7784                 } else {
7785                         if ($params{-single}) {
7786                                 push @commit_spec, '-1';
7787                         } else {
7788                                 if ($patch_max > 0) {
7789                                         push @commit_spec, "-$patch_max";
7790                                 }
7791                                 push @commit_spec, "-n";
7792                         }
7793                         push @commit_spec, '--root', $hash;
7794                 }
7795                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7796                         '--encoding=utf8', '--stdout', @commit_spec
7797                         or die_error(500, "Open git-format-patch failed");
7798         } else {
7799                 die_error(400, "Unknown commitdiff format");
7800         }
7801
7802         # non-textual hash id's can be cached
7803         my $expires;
7804         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7805                 $expires = "+1d";
7806         }
7807
7808         # write commit message
7809         if ($format eq 'html') {
7810                 my $refs = git_get_references();
7811                 my $ref = format_ref_marker($refs, $co{'id'});
7812
7813                 git_header_html(undef, $expires);
7814                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7815                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7816                 print "<div class=\"title_text\">\n" .
7817                       "<table class=\"object_header\">\n";
7818                 git_print_authorship_rows(\%co);
7819                 print "</table>".
7820                       "</div>\n";
7821                 print "<div class=\"page_body\">\n";
7822                 if (@{$co{'comment'}} > 1) {
7823                         print "<div class=\"log\">\n";
7824                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7825                         print "</div>\n"; # class="log"
7826                 }
7827
7828         } elsif ($format eq 'plain') {
7829                 my $refs = git_get_references("tags");
7830                 my $tagname = git_get_rev_name_tags($hash);
7831                 my $filename = basename($project) . "-$hash.patch";
7832
7833                 print $cgi->header(
7834                         -type => 'text/plain',
7835                         -charset => 'utf-8',
7836                         -expires => $expires,
7837                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7838                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7839                 print "From: " . to_utf8($co{'author'}) . "\n";
7840                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7841                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7842
7843                 print "X-Git-Tag: $tagname\n" if $tagname;
7844                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7845
7846                 foreach my $line (@{$co{'comment'}}) {
7847                         print to_utf8($line) . "\n";
7848                 }
7849                 print "---\n\n";
7850         } elsif ($format eq 'patch') {
7851                 my $filename = basename($project) . "-$hash.patch";
7852
7853                 print $cgi->header(
7854                         -type => 'text/plain',
7855                         -charset => 'utf-8',
7856                         -expires => $expires,
7857                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7858         }
7859
7860         # write patch
7861         if ($format eq 'html') {
7862                 my $use_parents = !defined $hash_parent ||
7863                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7864                 git_difftree_body(\@difftree, $hash,
7865                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7866                 print "<br/>\n";
7867
7868                 git_patchset_body($fd, $diff_style,
7869                                   \@difftree, $hash,
7870                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7871                 close $fd;
7872                 print "</div>\n"; # class="page_body"
7873                 git_footer_html();
7874
7875         } elsif ($format eq 'plain') {
7876                 local $/ = undef;
7877                 print <$fd>;
7878                 close $fd
7879                         or print "Reading git-diff-tree failed\n";
7880         } elsif ($format eq 'patch') {
7881                 local $/ = undef;
7882                 print <$fd>;
7883                 close $fd
7884                         or print "Reading git-format-patch failed\n";
7885         }
7886 }
7887
7888 sub git_commitdiff_plain {
7889         git_commitdiff(-format => 'plain');
7890 }
7891
7892 # format-patch-style patches
7893 sub git_patch {
7894         git_commitdiff(-format => 'patch', -single => 1);
7895 }
7896
7897 sub git_patches {
7898         git_commitdiff(-format => 'patch');
7899 }
7900
7901 sub git_history {
7902         git_log_generic('history', \&git_history_body,
7903                         $hash_base, $hash_parent_base,
7904                         $file_name, $hash);
7905 }
7906
7907 sub git_search {
7908         $searchtype ||= 'commit';
7909
7910         # check if appropriate features are enabled
7911         gitweb_check_feature('search')
7912                 or die_error(403, "Search is disabled");
7913         if ($searchtype eq 'pickaxe') {
7914                 # pickaxe may take all resources of your box and run for several minutes
7915                 # with every query - so decide by yourself how public you make this feature
7916                 gitweb_check_feature('pickaxe')
7917                         or die_error(403, "Pickaxe search is disabled");
7918         }
7919         if ($searchtype eq 'grep') {
7920                 # grep search might be potentially CPU-intensive, too
7921                 gitweb_check_feature('grep')
7922                         or die_error(403, "Grep search is disabled");
7923         }
7924
7925         if (!defined $searchtext) {
7926                 die_error(400, "Text field is empty");
7927         }
7928         if (!defined $hash) {
7929                 $hash = git_get_head_hash($project);
7930         }
7931         my %co = parse_commit($hash);
7932         if (!%co) {
7933                 die_error(404, "Unknown commit object");
7934         }
7935         if (!defined $page) {
7936                 $page = 0;
7937         }
7938
7939         if ($searchtype eq 'commit' ||
7940             $searchtype eq 'author' ||
7941             $searchtype eq 'committer') {
7942                 git_search_message(%co);
7943         } elsif ($searchtype eq 'pickaxe') {
7944                 git_search_changes(%co);
7945         } elsif ($searchtype eq 'grep') {
7946                 git_search_files(%co);
7947         } else {
7948                 die_error(400, "Unknown search type");
7949         }
7950 }
7951
7952 sub git_search_help {
7953         git_header_html();
7954         git_print_page_nav('','', $hash,$hash,$hash);
7955         print <<EOT;
7956 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7957 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7958 the pattern entered is recognized as the POSIX extended
7959 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7960 insensitive).</p>
7961 <dl>
7962 <dt><b>commit</b></dt>
7963 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7964 EOT
7965         my $have_grep = gitweb_check_feature('grep');
7966         if ($have_grep) {
7967                 print <<EOT;
7968 <dt><b>grep</b></dt>
7969 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7970     a different one) are searched for the given pattern. On large trees, this search can take
7971 a while and put some strain on the server, so please use it with some consideration. Note that
7972 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7973 case-sensitive.</dd>
7974 EOT
7975         }
7976         print <<EOT;
7977 <dt><b>author</b></dt>
7978 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7979 <dt><b>committer</b></dt>
7980 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7981 EOT
7982         my $have_pickaxe = gitweb_check_feature('pickaxe');
7983         if ($have_pickaxe) {
7984                 print <<EOT;
7985 <dt><b>pickaxe</b></dt>
7986 <dd>All commits that caused the string to appear or disappear from any file (changes that
7987 added, removed or "modified" the string) will be listed. This search can take a while and
7988 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7989 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7990 EOT
7991         }
7992         print "</dl>\n";
7993         git_footer_html();
7994 }
7995
7996 sub git_shortlog {
7997         git_log_generic('shortlog', \&git_shortlog_body,
7998                         $hash, $hash_parent);
7999 }
8000
8001 ## ......................................................................
8002 ## feeds (RSS, Atom; OPML)
8003
8004 sub git_feed {
8005         my $format = shift || 'atom';
8006         my $have_blame = gitweb_check_feature('blame');
8007
8008         # Atom: http://www.atomenabled.org/developers/syndication/
8009         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8010         if ($format ne 'rss' && $format ne 'atom') {
8011                 die_error(400, "Unknown web feed format");
8012         }
8013
8014         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8015         my $head = $hash || 'HEAD';
8016         my @commitlist = parse_commits($head, 150, 0, $file_name);
8017
8018         my %latest_commit;
8019         my %latest_date;
8020         my $content_type = "application/$format+xml";
8021         if (defined $cgi->http('HTTP_ACCEPT') &&
8022                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8023                 # browser (feed reader) prefers text/xml
8024                 $content_type = 'text/xml';
8025         }
8026         if (defined($commitlist[0])) {
8027                 %latest_commit = %{$commitlist[0]};
8028                 my $latest_epoch = $latest_commit{'committer_epoch'};
8029                 exit_if_unmodified_since($latest_epoch);
8030                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8031         }
8032         print $cgi->header(
8033                 -type => $content_type,
8034                 -charset => 'utf-8',
8035                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8036                 -status => '200 OK');
8037
8038         # Optimization: skip generating the body if client asks only
8039         # for Last-Modified date.
8040         return if ($cgi->request_method() eq 'HEAD');
8041
8042         # header variables
8043         my $title = "$site_name - $project/$action";
8044         my $feed_type = 'log';
8045         if (defined $hash) {
8046                 $title .= " - '$hash'";
8047                 $feed_type = 'branch log';
8048                 if (defined $file_name) {
8049                         $title .= " :: $file_name";
8050                         $feed_type = 'history';
8051                 }
8052         } elsif (defined $file_name) {
8053                 $title .= " - $file_name";
8054                 $feed_type = 'history';
8055         }
8056         $title .= " $feed_type";
8057         $title = esc_html($title);
8058         my $descr = git_get_project_description($project);
8059         if (defined $descr) {
8060                 $descr = esc_html($descr);
8061         } else {
8062                 $descr = "$project " .
8063                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8064                          " feed";
8065         }
8066         my $owner = git_get_project_owner($project);
8067         $owner = esc_html($owner);
8068
8069         #header
8070         my $alt_url;
8071         if (defined $file_name) {
8072                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8073         } elsif (defined $hash) {
8074                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8075         } else {
8076                 $alt_url = href(-full=>1, action=>"summary");
8077         }
8078         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8079         if ($format eq 'rss') {
8080                 print <<XML;
8081 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8082 <channel>
8083 XML
8084                 print "<title>$title</title>\n" .
8085                       "<link>$alt_url</link>\n" .
8086                       "<description>$descr</description>\n" .
8087                       "<language>en</language>\n" .
8088                       # project owner is responsible for 'editorial' content
8089                       "<managingEditor>$owner</managingEditor>\n";
8090                 if (defined $logo || defined $favicon) {
8091                         # prefer the logo to the favicon, since RSS
8092                         # doesn't allow both
8093                         my $img = esc_url($logo || $favicon);
8094                         print "<image>\n" .
8095                               "<url>$img</url>\n" .
8096                               "<title>$title</title>\n" .
8097                               "<link>$alt_url</link>\n" .
8098                               "</image>\n";
8099                 }
8100                 if (%latest_date) {
8101                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8102                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8103                 }
8104                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8105         } elsif ($format eq 'atom') {
8106                 print <<XML;
8107 <feed xmlns="http://www.w3.org/2005/Atom">
8108 XML
8109                 print "<title>$title</title>\n" .
8110                       "<subtitle>$descr</subtitle>\n" .
8111                       '<link rel="alternate" type="text/html" href="' .
8112                       $alt_url . '" />' . "\n" .
8113                       '<link rel="self" type="' . $content_type . '" href="' .
8114                       $cgi->self_url() . '" />' . "\n" .
8115                       "<id>" . href(-full=>1) . "</id>\n" .
8116                       # use project owner for feed author
8117                       "<author><name>$owner</name></author>\n";
8118                 if (defined $favicon) {
8119                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8120                 }
8121                 if (defined $logo) {
8122                         # not twice as wide as tall: 72 x 27 pixels
8123                         print "<logo>" . esc_url($logo) . "</logo>\n";
8124                 }
8125                 if (! %latest_date) {
8126                         # dummy date to keep the feed valid until commits trickle in:
8127                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8128                 } else {
8129                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8130                 }
8131                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8132         }
8133
8134         # contents
8135         for (my $i = 0; $i <= $#commitlist; $i++) {
8136                 my %co = %{$commitlist[$i]};
8137                 my $commit = $co{'id'};
8138                 # we read 150, we always show 30 and the ones more recent than 48 hours
8139                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8140                         last;
8141                 }
8142                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8143
8144                 # get list of changed files
8145                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8146                         $co{'parent'} || "--root",
8147                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8148                         or next;
8149                 my @difftree = map { chomp; $_ } <$fd>;
8150                 close $fd
8151                         or next;
8152
8153                 # print element (entry, item)
8154                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8155                 if ($format eq 'rss') {
8156                         print "<item>\n" .
8157                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8158                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8159                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8160                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8161                               "<link>$co_url</link>\n" .
8162                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8163                               "<content:encoded>" .
8164                               "<![CDATA[\n";
8165                 } elsif ($format eq 'atom') {
8166                         print "<entry>\n" .
8167                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8168                               "<updated>$cd{'iso-8601'}</updated>\n" .
8169                               "<author>\n" .
8170                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8171                         if ($co{'author_email'}) {
8172                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8173                         }
8174                         print "</author>\n" .
8175                               # use committer for contributor
8176                               "<contributor>\n" .
8177                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8178                         if ($co{'committer_email'}) {
8179                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8180                         }
8181                         print "</contributor>\n" .
8182                               "<published>$cd{'iso-8601'}</published>\n" .
8183                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8184                               "<id>$co_url</id>\n" .
8185                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8186                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8187                 }
8188                 my $comment = $co{'comment'};
8189                 print "<pre>\n";
8190                 foreach my $line (@$comment) {
8191                         $line = esc_html($line);
8192                         print "$line\n";
8193                 }
8194                 print "</pre><ul>\n";
8195                 foreach my $difftree_line (@difftree) {
8196                         my %difftree = parse_difftree_raw_line($difftree_line);
8197                         next if !$difftree{'from_id'};
8198
8199                         my $file = $difftree{'file'} || $difftree{'to_file'};
8200
8201                         print "<li>" .
8202                               "[" .
8203                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8204                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8205                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8206                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8207                                       -title => "diff"}, 'D');
8208                         if ($have_blame) {
8209                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8210                                                              file_name=>$file, hash_base=>$commit),
8211                                               -title => "blame"}, 'B');
8212                         }
8213                         # if this is not a feed of a file history
8214                         if (!defined $file_name || $file_name ne $file) {
8215                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8216                                                              file_name=>$file, hash=>$commit),
8217                                               -title => "history"}, 'H');
8218                         }
8219                         $file = esc_path($file);
8220                         print "] ".
8221                               "$file</li>\n";
8222                 }
8223                 if ($format eq 'rss') {
8224                         print "</ul>]]>\n" .
8225                               "</content:encoded>\n" .
8226                               "</item>\n";
8227                 } elsif ($format eq 'atom') {
8228                         print "</ul>\n</div>\n" .
8229                               "</content>\n" .
8230                               "</entry>\n";
8231                 }
8232         }
8233
8234         # end of feed
8235         if ($format eq 'rss') {
8236                 print "</channel>\n</rss>\n";
8237         } elsif ($format eq 'atom') {
8238                 print "</feed>\n";
8239         }
8240 }
8241
8242 sub git_rss {
8243         git_feed('rss');
8244 }
8245
8246 sub git_atom {
8247         git_feed('atom');
8248 }
8249
8250 sub git_opml {
8251         my @list = git_get_projects_list($project_filter, $strict_export);
8252         if (!@list) {
8253                 die_error(404, "No projects found");
8254         }
8255
8256         print $cgi->header(
8257                 -type => 'text/xml',
8258                 -charset => 'utf-8',
8259                 -content_disposition => 'inline; filename="opml.xml"');
8260
8261         my $title = esc_html($site_name);
8262         my $filter = " within subdirectory ";
8263         if (defined $project_filter) {
8264                 $filter .= esc_html($project_filter);
8265         } else {
8266                 $filter = "";
8267         }
8268         print <<XML;
8269 <?xml version="1.0" encoding="utf-8"?>
8270 <opml version="1.0">
8271 <head>
8272   <title>$title OPML Export$filter</title>
8273 </head>
8274 <body>
8275 <outline text="git RSS feeds">
8276 XML
8277
8278         foreach my $pr (@list) {
8279                 my %proj = %$pr;
8280                 my $head = git_get_head_hash($proj{'path'});
8281                 if (!defined $head) {
8282                         next;
8283                 }
8284                 $git_dir = "$projectroot/$proj{'path'}";
8285                 my %co = parse_commit($head);
8286                 if (!%co) {
8287                         next;
8288                 }
8289
8290                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8291                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8292                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8293                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8294         }
8295         print <<XML;
8296 </outline>
8297 </body>
8298 </opml>
8299 XML
8300 }