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 { $_ => $_ }
 274                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 275         # alternate extensions, see /etc/highlight/filetypes.conf
 276         'h' => 'c',
 277         map { $_ => 'sh'  } qw(bash zsh ksh),
 278         map { $_ => 'cpp' } qw(cxx c++ cc),
 279         map { $_ => 'php' } qw(php3 php4 php5 phps),
 280         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 281         map { $_ => 'make'} qw(mak mk),
 282         map { $_ => 'xml' } qw(xhtml html htm),
 283 );
 284
 285 # You define site-wide feature defaults here; override them with
 286 # $GITWEB_CONFIG as necessary.
 287 our %feature = (
 288         # feature => {
 289         #       'sub' => feature-sub (subroutine),
 290         #       'override' => allow-override (boolean),
 291         #       'default' => [ default options...] (array reference)}
 292         #
 293         # if feature is overridable (it means that allow-override has true value),
 294         # then feature-sub will be called with default options as parameters;
 295         # return value of feature-sub indicates if to enable specified feature
 296         #
 297         # if there is no 'sub' key (no feature-sub), then feature cannot be
 298         # overridden
 299         #
 300         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 301         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 302         # is enabled
 303
 304         # Enable the 'blame' blob view, showing the last commit that modified
 305         # each line in the file. This can be very CPU-intensive.
 306
 307         # To enable system wide have in $GITWEB_CONFIG
 308         # $feature{'blame'}{'default'} = [1];
 309         # To have project specific config enable override in $GITWEB_CONFIG
 310         # $feature{'blame'}{'override'} = 1;
 311         # and in project config gitweb.blame = 0|1;
 312         'blame' => {
 313                 'sub' => sub { feature_bool('blame', @_) },
 314                 'override' => 0,
 315                 'default' => [0]},
 316
 317         # Enable the 'snapshot' link, providing a compressed archive of any
 318         # tree. This can potentially generate high traffic if you have large
 319         # project.
 320
 321         # Value is a list of formats defined in %known_snapshot_formats that
 322         # you wish to offer.
 323         # To disable system wide have in $GITWEB_CONFIG
 324         # $feature{'snapshot'}{'default'} = [];
 325         # To have project specific config enable override in $GITWEB_CONFIG
 326         # $feature{'snapshot'}{'override'} = 1;
 327         # and in project config, a comma-separated list of formats or "none"
 328         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 329         'snapshot' => {
 330                 'sub' => \&feature_snapshot,
 331                 'override' => 0,
 332                 'default' => ['tgz']},
 333
 334         # Enable text search, which will list the commits which match author,
 335         # committer or commit text to a given string.  Enabled by default.
 336         # Project specific override is not supported.
 337         #
 338         # Note that this controls all search features, which means that if
 339         # it is disabled, then 'grep' and 'pickaxe' search would also be
 340         # disabled.
 341         'search' => {
 342                 'override' => 0,
 343                 'default' => [1]},
 344
 345         # Enable grep search, which will list the files in currently selected
 346         # tree containing the given string. Enabled by default. This can be
 347         # potentially CPU-intensive, of course.
 348         # Note that you need to have 'search' feature enabled too.
 349
 350         # To enable system wide have in $GITWEB_CONFIG
 351         # $feature{'grep'}{'default'} = [1];
 352         # To have project specific config enable override in $GITWEB_CONFIG
 353         # $feature{'grep'}{'override'} = 1;
 354         # and in project config gitweb.grep = 0|1;
 355         'grep' => {
 356                 'sub' => sub { feature_bool('grep', @_) },
 357                 'override' => 0,
 358                 'default' => [1]},
 359
 360         # Enable the pickaxe search, which will list the commits that modified
 361         # a given string in a file. This can be practical and quite faster
 362         # alternative to 'blame', but still potentially CPU-intensive.
 363         # Note that you need to have 'search' feature enabled too.
 364
 365         # To enable system wide have in $GITWEB_CONFIG
 366         # $feature{'pickaxe'}{'default'} = [1];
 367         # To have project specific config enable override in $GITWEB_CONFIG
 368         # $feature{'pickaxe'}{'override'} = 1;
 369         # and in project config gitweb.pickaxe = 0|1;
 370         'pickaxe' => {
 371                 'sub' => sub { feature_bool('pickaxe', @_) },
 372                 'override' => 0,
 373                 'default' => [1]},
 374
 375         # Enable showing size of blobs in a 'tree' view, in a separate
 376         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 377
 378         # To disable system wide have in $GITWEB_CONFIG
 379         # $feature{'show-sizes'}{'default'} = [0];
 380         # To have project specific config enable override in $GITWEB_CONFIG
 381         # $feature{'show-sizes'}{'override'} = 1;
 382         # and in project config gitweb.showsizes = 0|1;
 383         'show-sizes' => {
 384                 'sub' => sub { feature_bool('showsizes', @_) },
 385                 'override' => 0,
 386                 'default' => [1]},
 387
 388         # Make gitweb use an alternative format of the URLs which can be
 389         # more readable and natural-looking: project name is embedded
 390         # directly in the path and the query string contains other
 391         # auxiliary information. All gitweb installations recognize
 392         # URL in either format; this configures in which formats gitweb
 393         # generates links.
 394
 395         # To enable system wide have in $GITWEB_CONFIG
 396         # $feature{'pathinfo'}{'default'} = [1];
 397         # Project specific override is not supported.
 398
 399         # Note that you will need to change the default location of CSS,
 400         # favicon, logo and possibly other files to an absolute URL. Also,
 401         # if gitweb.cgi serves as your indexfile, you will need to force
 402         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 403         'pathinfo' => {
 404                 'override' => 0,
 405                 'default' => [0]},
 406
 407         # Make gitweb consider projects in project root subdirectories
 408         # to be forks of existing projects. Given project $projname.git,
 409         # projects matching $projname/*.git will not be shown in the main
 410         # projects list, instead a '+' mark will be added to $projname
 411         # there and a 'forks' view will be enabled for the project, listing
 412         # all the forks. If project list is taken from a file, forks have
 413         # to be listed after the main project.
 414
 415         # To enable system wide have in $GITWEB_CONFIG
 416         # $feature{'forks'}{'default'} = [1];
 417         # Project specific override is not supported.
 418         'forks' => {
 419                 'override' => 0,
 420                 'default' => [0]},
 421
 422         # Insert custom links to the action bar of all project pages.
 423         # This enables you mainly to link to third-party scripts integrating
 424         # into gitweb; e.g. git-browser for graphical history representation
 425         # or custom web-based repository administration interface.
 426
 427         # The 'default' value consists of a list of triplets in the form
 428         # (label, link, position) where position is the label after which
 429         # to insert the link and link is a format string where %n expands
 430         # to the project name, %f to the project path within the filesystem,
 431         # %h to the current hash (h gitweb parameter) and %b to the current
 432         # hash base (hb gitweb parameter); %% expands to %.
 433
 434         # To enable system wide have in $GITWEB_CONFIG e.g.
 435         # $feature{'actions'}{'default'} = [('graphiclog',
 436         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 437         # Project specific override is not supported.
 438         'actions' => {
 439                 'override' => 0,
 440                 'default' => []},
 441
 442         # Allow gitweb scan project content tags of project repository,
 443         # and display the popular Web 2.0-ish "tag cloud" near the projects
 444         # list.  Note that this is something COMPLETELY different from the
 445         # normal Git tags.
 446
 447         # gitweb by itself can show existing tags, but it does not handle
 448         # tagging itself; you need to do it externally, outside gitweb.
 449         # The format is described in git_get_project_ctags() subroutine.
 450         # You may want to install the HTML::TagCloud Perl module to get
 451         # a pretty tag cloud instead of just a list of tags.
 452
 453         # To enable system wide have in $GITWEB_CONFIG
 454         # $feature{'ctags'}{'default'} = [1];
 455         # Project specific override is not supported.
 456
 457         # In the future whether ctags editing is enabled might depend
 458         # on the value, but using 1 should always mean no editing of ctags.
 459         'ctags' => {
 460                 'override' => 0,
 461                 'default' => [0]},
 462
 463         # The maximum number of patches in a patchset generated in patch
 464         # view. Set this to 0 or undef to disable patch view, or to a
 465         # negative number to remove any limit.
 466
 467         # To disable system wide have in $GITWEB_CONFIG
 468         # $feature{'patches'}{'default'} = [0];
 469         # To have project specific config enable override in $GITWEB_CONFIG
 470         # $feature{'patches'}{'override'} = 1;
 471         # and in project config gitweb.patches = 0|n;
 472         # where n is the maximum number of patches allowed in a patchset.
 473         'patches' => {
 474                 'sub' => \&feature_patches,
 475                 'override' => 0,
 476                 'default' => [16]},
 477
 478         # Avatar support. When this feature is enabled, views such as
 479         # shortlog or commit will display an avatar associated with
 480         # the email of the committer(s) and/or author(s).
 481
 482         # Currently available providers are gravatar and picon.
 483         # If an unknown provider is specified, the feature is disabled.
 484
 485         # Gravatar depends on Digest::MD5.
 486         # Picon currently relies on the indiana.edu database.
 487
 488         # To enable system wide have in $GITWEB_CONFIG
 489         # $feature{'avatar'}{'default'} = ['<provider>'];
 490         # where <provider> is either gravatar or picon.
 491         # To have project specific config enable override in $GITWEB_CONFIG
 492         # $feature{'avatar'}{'override'} = 1;
 493         # and in project config gitweb.avatar = <provider>;
 494         'avatar' => {
 495                 'sub' => \&feature_avatar,
 496                 'override' => 0,
 497                 'default' => ['']},
 498
 499         # Enable displaying how much time and how many git commands
 500         # it took to generate and display page.  Disabled by default.
 501         # Project specific override is not supported.
 502         'timed' => {
 503                 'override' => 0,
 504                 'default' => [0]},
 505
 506         # Enable turning some links into links to actions which require
 507         # JavaScript to run (like 'blame_incremental').  Not enabled by
 508         # default.  Project specific override is currently not supported.
 509         'javascript-actions' => {
 510                 'override' => 0,
 511                 'default' => [0]},
 512
 513         # Enable and configure ability to change common timezone for dates
 514         # in gitweb output via JavaScript.  Enabled by default.
 515         # Project specific override is not supported.
 516         'javascript-timezone' => {
 517                 'override' => 0,
 518                 'default' => [
 519                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 520                                      # or undef to turn off this feature
 521                         'gitweb_tz', # name of cookie where to store selected timezone
 522                         'datetime',  # CSS class used to mark up dates for manipulation
 523                 ]},
 524
 525         # Syntax highlighting support. This is based on Daniel Svensson's
 526         # and Sham Chukoury's work in gitweb-xmms2.git.
 527         # It requires the 'highlight' program present in $PATH,
 528         # and therefore is disabled by default.
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'highlight'}{'default'} = [1];
 532
 533         'highlight' => {
 534                 'sub' => sub { feature_bool('highlight', @_) },
 535                 'override' => 0,
 536                 'default' => [0]},
 537
 538         # Enable displaying of remote heads in the heads list
 539
 540         # To enable system wide have in $GITWEB_CONFIG
 541         # $feature{'remote_heads'}{'default'} = [1];
 542         # To have project specific config enable override in $GITWEB_CONFIG
 543         # $feature{'remote_heads'}{'override'} = 1;
 544         # and in project config gitweb.remote_heads = 0|1;
 545         'remote_heads' => {
 546                 'sub' => sub { feature_bool('remote_heads', @_) },
 547                 'override' => 0,
 548                 'default' => [0]},
 549 );
 550
 551 sub gitweb_get_feature {
 552         my ($name) = @_;
 553         return unless exists $feature{$name};
 554         my ($sub, $override, @defaults) = (
 555                 $feature{$name}{'sub'},
 556                 $feature{$name}{'override'},
 557                 @{$feature{$name}{'default'}});
 558         # project specific override is possible only if we have project
 559         our $git_dir; # global variable, declared later
 560         if (!$override || !defined $git_dir) {
 561                 return @defaults;
 562         }
 563         if (!defined $sub) {
 564                 warn "feature $name is not overridable";
 565                 return @defaults;
 566         }
 567         return $sub->(@defaults);
 568 }
 569
 570 # A wrapper to check if a given feature is enabled.
 571 # With this, you can say
 572 #
 573 #   my $bool_feat = gitweb_check_feature('bool_feat');
 574 #   gitweb_check_feature('bool_feat') or somecode;
 575 #
 576 # instead of
 577 #
 578 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 579 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 580 #
 581 sub gitweb_check_feature {
 582         return (gitweb_get_feature(@_))[0];
 583 }
 584
 585
 586 sub feature_bool {
 587         my $key = shift;
 588         my ($val) = git_get_project_config($key, '--bool');
 589
 590         if (!defined $val) {
 591                 return ($_[0]);
 592         } elsif ($val eq 'true') {
 593                 return (1);
 594         } elsif ($val eq 'false') {
 595                 return (0);
 596         }
 597 }
 598
 599 sub feature_snapshot {
 600         my (@fmts) = @_;
 601
 602         my ($val) = git_get_project_config('snapshot');
 603
 604         if ($val) {
 605                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 606         }
 607
 608         return @fmts;
 609 }
 610
 611 sub feature_patches {
 612         my @val = (git_get_project_config('patches', '--int'));
 613
 614         if (@val) {
 615                 return @val;
 616         }
 617
 618         return ($_[0]);
 619 }
 620
 621 sub feature_avatar {
 622         my @val = (git_get_project_config('avatar'));
 623
 624         return @val ? @val : @_;
 625 }
 626
 627 # checking HEAD file with -e is fragile if the repository was
 628 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 629 # and then pruned.
 630 sub check_head_link {
 631         my ($dir) = @_;
 632         my $headfile = "$dir/HEAD";
 633         return ((-e $headfile) ||
 634                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 635 }
 636
 637 sub check_export_ok {
 638         my ($dir) = @_;
 639         return (check_head_link($dir) &&
 640                 (!$export_ok || -e "$dir/$export_ok") &&
 641                 (!$export_auth_hook || $export_auth_hook->($dir)));
 642 }
 643
 644 # process alternate names for backward compatibility
 645 # filter out unsupported (unknown) snapshot formats
 646 sub filter_snapshot_fmts {
 647         my @fmts = @_;
 648
 649         @fmts = map {
 650                 exists $known_snapshot_format_aliases{$_} ?
 651                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 652         @fmts = grep {
 653                 exists $known_snapshot_formats{$_} &&
 654                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 655 }
 656
 657 # If it is set to code reference, it is code that it is to be run once per
 658 # request, allowing updating configurations that change with each request,
 659 # while running other code in config file only once.
 660 #
 661 # Otherwise, if it is false then gitweb would process config file only once;
 662 # if it is true then gitweb config would be run for each request.
 663 our $per_request_config = 1;
 664
 665 # read and parse gitweb config file given by its parameter.
 666 # returns true on success, false on recoverable error, allowing
 667 # to chain this subroutine, using first file that exists.
 668 # dies on errors during parsing config file, as it is unrecoverable.
 669 sub read_config_file {
 670         my $filename = shift;
 671         return unless defined $filename;
 672         # die if there are errors parsing config file
 673         if (-e $filename) {
 674                 do $filename;
 675                 die $@ if $@;
 676                 return 1;
 677         }
 678         return;
 679 }
 680
 681 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 682 sub evaluate_gitweb_config {
 683         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 684         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 685         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 686
 687         # Protect agains duplications of file names, to not read config twice.
 688         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 689         # there possibility of duplication of filename there doesn't matter.
 690         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 691         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 692
 693         # Common system-wide settings for convenience.
 694         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 695         read_config_file($GITWEB_CONFIG_COMMON);
 696
 697         # Use first config file that exists.  This means use the per-instance
 698         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 699         read_config_file($GITWEB_CONFIG) and return;
 700         read_config_file($GITWEB_CONFIG_SYSTEM);
 701 }
 702
 703 # Get loadavg of system, to compare against $maxload.
 704 # Currently it requires '/proc/loadavg' present to get loadavg;
 705 # if it is not present it returns 0, which means no load checking.
 706 sub get_loadavg {
 707         if( -e '/proc/loadavg' ){
 708                 open my $fd, '<', '/proc/loadavg'
 709                         or return 0;
 710                 my @load = split(/\s+/, scalar <$fd>);
 711                 close $fd;
 712
 713                 # The first three columns measure CPU and IO utilization of the last one,
 714                 # five, and 10 minute periods.  The fourth column shows the number of
 715                 # currently running processes and the total number of processes in the m/n
 716                 # format.  The last column displays the last process ID used.
 717                 return $load[0] || 0;
 718         }
 719         # additional checks for load average should go here for things that don't export
 720         # /proc/loadavg
 721
 722         return 0;
 723 }
 724
 725 # version of the core git binary
 726 our $git_version;
 727 sub evaluate_git_version {
 728         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 729         $number_of_git_cmds++;
 730 }
 731
 732 sub check_loadavg {
 733         if (defined $maxload && get_loadavg() > $maxload) {
 734                 die_error(503, "The load average on the server is too high");
 735         }
 736 }
 737
 738 # ======================================================================
 739 # input validation and dispatch
 740
 741 # input parameters can be collected from a variety of sources (presently, CGI
 742 # and PATH_INFO), so we define an %input_params hash that collects them all
 743 # together during validation: this allows subsequent uses (e.g. href()) to be
 744 # agnostic of the parameter origin
 745
 746 our %input_params = ();
 747
 748 # input parameters are stored with the long parameter name as key. This will
 749 # also be used in the href subroutine to convert parameters to their CGI
 750 # equivalent, and since the href() usage is the most frequent one, we store
 751 # the name -> CGI key mapping here, instead of the reverse.
 752 #
 753 # XXX: Warning: If you touch this, check the search form for updating,
 754 # too.
 755
 756 our @cgi_param_mapping = (
 757         project => "p",
 758         action => "a",
 759         file_name => "f",
 760         file_parent => "fp",
 761         hash => "h",
 762         hash_parent => "hp",
 763         hash_base => "hb",
 764         hash_parent_base => "hpb",
 765         page => "pg",
 766         order => "o",
 767         searchtext => "s",
 768         searchtype => "st",
 769         snapshot_format => "sf",
 770         extra_options => "opt",
 771         search_use_regexp => "sr",
 772         ctag => "by_tag",
 773         diff_style => "ds",
 774         project_filter => "pf",
 775         # this must be last entry (for manipulation from JavaScript)
 776         javascript => "js"
 777 );
 778 our %cgi_param_mapping = @cgi_param_mapping;
 779
 780 # we will also need to know the possible actions, for validation
 781 our %actions = (
 782         "blame" => \&git_blame,
 783         "blame_incremental" => \&git_blame_incremental,
 784         "blame_data" => \&git_blame_data,
 785         "blobdiff" => \&git_blobdiff,
 786         "blobdiff_plain" => \&git_blobdiff_plain,
 787         "blob" => \&git_blob,
 788         "blob_plain" => \&git_blob_plain,
 789         "commitdiff" => \&git_commitdiff,
 790         "commitdiff_plain" => \&git_commitdiff_plain,
 791         "commit" => \&git_commit,
 792         "forks" => \&git_forks,
 793         "heads" => \&git_heads,
 794         "history" => \&git_history,
 795         "log" => \&git_log,
 796         "patch" => \&git_patch,
 797         "patches" => \&git_patches,
 798         "remotes" => \&git_remotes,
 799         "rss" => \&git_rss,
 800         "atom" => \&git_atom,
 801         "search" => \&git_search,
 802         "search_help" => \&git_search_help,
 803         "shortlog" => \&git_shortlog,
 804         "summary" => \&git_summary,
 805         "tag" => \&git_tag,
 806         "tags" => \&git_tags,
 807         "tree" => \&git_tree,
 808         "snapshot" => \&git_snapshot,
 809         "object" => \&git_object,
 810         # those below don't need $project
 811         "opml" => \&git_opml,
 812         "project_list" => \&git_project_list,
 813         "project_index" => \&git_project_index,
 814 );
 815
 816 # finally, we have the hash of allowed extra_options for the commands that
 817 # allow them
 818 our %allowed_options = (
 819         "--no-merges" => [ qw(rss atom log shortlog history) ],
 820 );
 821
 822 # fill %input_params with the CGI parameters. All values except for 'opt'
 823 # should be single values, but opt can be an array. We should probably
 824 # build an array of parameters that can be multi-valued, but since for the time
 825 # being it's only this one, we just single it out
 826 sub evaluate_query_params {
 827         our $cgi;
 828
 829         while (my ($name, $symbol) = each %cgi_param_mapping) {
 830                 if ($symbol eq 'opt') {
 831                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 832                 } else {
 833                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 834                 }
 835         }
 836 }
 837
 838 # now read PATH_INFO and update the parameter list for missing parameters
 839 sub evaluate_path_info {
 840         return if defined $input_params{'project'};
 841         return if !$path_info;
 842         $path_info =~ s,^/+,,;
 843         return if !$path_info;
 844
 845         # find which part of PATH_INFO is project
 846         my $project = $path_info;
 847         $project =~ s,/+$,,;
 848         while ($project && !check_head_link("$projectroot/$project")) {
 849                 $project =~ s,/*[^/]*$,,;
 850         }
 851         return unless $project;
 852         $input_params{'project'} = $project;
 853
 854         # do not change any parameters if an action is given using the query string
 855         return if $input_params{'action'};
 856         $path_info =~ s,^\Q$project\E/*,,;
 857
 858         # next, check if we have an action
 859         my $action = $path_info;
 860         $action =~ s,/.*$,,;
 861         if (exists $actions{$action}) {
 862                 $path_info =~ s,^$action/*,,;
 863                 $input_params{'action'} = $action;
 864         }
 865
 866         # list of actions that want hash_base instead of hash, but can have no
 867         # pathname (f) parameter
 868         my @wants_base = (
 869                 'tree',
 870                 'history',
 871         );
 872
 873         # we want to catch, among others
 874         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 875         my ($parentrefname, $parentpathname, $refname, $pathname) =
 876                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 877
 878         # first, analyze the 'current' part
 879         if (defined $pathname) {
 880                 # we got "branch:filename" or "branch:dir/"
 881                 # we could use git_get_type(branch:pathname), but:
 882                 # - it needs $git_dir
 883                 # - it does a git() call
 884                 # - the convention of terminating directories with a slash
 885                 #   makes it superfluous
 886                 # - embedding the action in the PATH_INFO would make it even
 887                 #   more superfluous
 888                 $pathname =~ s,^/+,,;
 889                 if (!$pathname || substr($pathname, -1) eq "/") {
 890                         $input_params{'action'} ||= "tree";
 891                         $pathname =~ s,/$,,;
 892                 } else {
 893                         # the default action depends on whether we had parent info
 894                         # or not
 895                         if ($parentrefname) {
 896                                 $input_params{'action'} ||= "blobdiff_plain";
 897                         } else {
 898                                 $input_params{'action'} ||= "blob_plain";
 899                         }
 900                 }
 901                 $input_params{'hash_base'} ||= $refname;
 902                 $input_params{'file_name'} ||= $pathname;
 903         } elsif (defined $refname) {
 904                 # we got "branch". In this case we have to choose if we have to
 905                 # set hash or hash_base.
 906                 #
 907                 # Most of the actions without a pathname only want hash to be
 908                 # set, except for the ones specified in @wants_base that want
 909                 # hash_base instead. It should also be noted that hand-crafted
 910                 # links having 'history' as an action and no pathname or hash
 911                 # set will fail, but that happens regardless of PATH_INFO.
 912                 if (defined $parentrefname) {
 913                         # if there is parent let the default be 'shortlog' action
 914                         # (for http://git.example.com/repo.git/A..B links); if there
 915                         # is no parent, dispatch will detect type of object and set
 916                         # action appropriately if required (if action is not set)
 917                         $input_params{'action'} ||= "shortlog";
 918                 }
 919                 if ($input_params{'action'} &&
 920                     grep { $_ eq $input_params{'action'} } @wants_base) {
 921                         $input_params{'hash_base'} ||= $refname;
 922                 } else {
 923                         $input_params{'hash'} ||= $refname;
 924                 }
 925         }
 926
 927         # next, handle the 'parent' part, if present
 928         if (defined $parentrefname) {
 929                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 930                 # someproject/blobdiff/oldrev..newrev:/filename
 931                 if ($parentpathname) {
 932                         $parentpathname =~ s,^/+,,;
 933                         $parentpathname =~ s,/$,,;
 934                         $input_params{'file_parent'} ||= $parentpathname;
 935                 } else {
 936                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 937                 }
 938                 # we assume that hash_parent_base is wanted if a path was specified,
 939                 # or if the action wants hash_base instead of hash
 940                 if (defined $input_params{'file_parent'} ||
 941                         grep { $_ eq $input_params{'action'} } @wants_base) {
 942                         $input_params{'hash_parent_base'} ||= $parentrefname;
 943                 } else {
 944                         $input_params{'hash_parent'} ||= $parentrefname;
 945                 }
 946         }
 947
 948         # for the snapshot action, we allow URLs in the form
 949         # $project/snapshot/$hash.ext
 950         # where .ext determines the snapshot and gets removed from the
 951         # passed $refname to provide the $hash.
 952         #
 953         # To be able to tell that $refname includes the format extension, we
 954         # require the following two conditions to be satisfied:
 955         # - the hash input parameter MUST have been set from the $refname part
 956         #   of the URL (i.e. they must be equal)
 957         # - the snapshot format MUST NOT have been defined already (e.g. from
 958         #   CGI parameter sf)
 959         # It's also useless to try any matching unless $refname has a dot,
 960         # so we check for that too
 961         if (defined $input_params{'action'} &&
 962                 $input_params{'action'} eq 'snapshot' &&
 963                 defined $refname && index($refname, '.') != -1 &&
 964                 $refname eq $input_params{'hash'} &&
 965                 !defined $input_params{'snapshot_format'}) {
 966                 # We loop over the known snapshot formats, checking for
 967                 # extensions. Allowed extensions are both the defined suffix
 968                 # (which includes the initial dot already) and the snapshot
 969                 # format key itself, with a prepended dot
 970                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 971                         my $hash = $refname;
 972                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 973                                 next;
 974                         }
 975                         my $sfx = $1;
 976                         # a valid suffix was found, so set the snapshot format
 977                         # and reset the hash parameter
 978                         $input_params{'snapshot_format'} = $fmt;
 979                         $input_params{'hash'} = $hash;
 980                         # we also set the format suffix to the one requested
 981                         # in the URL: this way a request for e.g. .tgz returns
 982                         # a .tgz instead of a .tar.gz
 983                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 984                         last;
 985                 }
 986         }
 987 }
 988
 989 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 990      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 991      $searchtext, $search_regexp, $project_filter);
 992 sub evaluate_and_validate_params {
 993         our $action = $input_params{'action'};
 994         if (defined $action) {
 995                 if (!validate_action($action)) {
 996                         die_error(400, "Invalid action parameter");
 997                 }
 998         }
 999
1000         # parameters which are pathnames
1001         our $project = $input_params{'project'};
1002         if (defined $project) {
1003                 if (!validate_project($project)) {
1004                         undef $project;
1005                         die_error(404, "No such project");
1006                 }
1007         }
1008
1009         our $project_filter = $input_params{'project_filter'};
1010         if (defined $project_filter) {
1011                 if (!validate_pathname($project_filter)) {
1012                         die_error(404, "Invalid project_filter parameter");
1013                 }
1014         }
1015
1016         our $file_name = $input_params{'file_name'};
1017         if (defined $file_name) {
1018                 if (!validate_pathname($file_name)) {
1019                         die_error(400, "Invalid file parameter");
1020                 }
1021         }
1022
1023         our $file_parent = $input_params{'file_parent'};
1024         if (defined $file_parent) {
1025                 if (!validate_pathname($file_parent)) {
1026                         die_error(400, "Invalid file parent parameter");
1027                 }
1028         }
1029
1030         # parameters which are refnames
1031         our $hash = $input_params{'hash'};
1032         if (defined $hash) {
1033                 if (!validate_refname($hash)) {
1034                         die_error(400, "Invalid hash parameter");
1035                 }
1036         }
1037
1038         our $hash_parent = $input_params{'hash_parent'};
1039         if (defined $hash_parent) {
1040                 if (!validate_refname($hash_parent)) {
1041                         die_error(400, "Invalid hash parent parameter");
1042                 }
1043         }
1044
1045         our $hash_base = $input_params{'hash_base'};
1046         if (defined $hash_base) {
1047                 if (!validate_refname($hash_base)) {
1048                         die_error(400, "Invalid hash base parameter");
1049                 }
1050         }
1051
1052         our @extra_options = @{$input_params{'extra_options'}};
1053         # @extra_options is always defined, since it can only be (currently) set from
1054         # CGI, and $cgi->param() returns the empty array in array context if the param
1055         # is not set
1056         foreach my $opt (@extra_options) {
1057                 if (not exists $allowed_options{$opt}) {
1058                         die_error(400, "Invalid option parameter");
1059                 }
1060                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1061                         die_error(400, "Invalid option parameter for this action");
1062                 }
1063         }
1064
1065         our $hash_parent_base = $input_params{'hash_parent_base'};
1066         if (defined $hash_parent_base) {
1067                 if (!validate_refname($hash_parent_base)) {
1068                         die_error(400, "Invalid hash parent base parameter");
1069                 }
1070         }
1071
1072         # other parameters
1073         our $page = $input_params{'page'};
1074         if (defined $page) {
1075                 if ($page =~ m/[^0-9]/) {
1076                         die_error(400, "Invalid page parameter");
1077                 }
1078         }
1079
1080         our $searchtype = $input_params{'searchtype'};
1081         if (defined $searchtype) {
1082                 if ($searchtype =~ m/[^a-z]/) {
1083                         die_error(400, "Invalid searchtype parameter");
1084                 }
1085         }
1086
1087         our $search_use_regexp = $input_params{'search_use_regexp'};
1088
1089         our $searchtext = $input_params{'searchtext'};
1090         our $search_regexp;
1091         if (defined $searchtext) {
1092                 if (length($searchtext) < 2) {
1093                         die_error(403, "At least two characters are required for search parameter");
1094                 }
1095                 if ($search_use_regexp) {
1096                         $search_regexp = $searchtext;
1097                         if (!eval { qr/$search_regexp/; 1; }) {
1098                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1099                                 die_error(400, "Invalid search regexp '$search_regexp'",
1100                                           esc_html($error));
1101                         }
1102                 } else {
1103                         $search_regexp = quotemeta $searchtext;
1104                 }
1105         }
1106 }
1107
1108 # path to the current git repository
1109 our $git_dir;
1110 sub evaluate_git_dir {
1111         our $git_dir = "$projectroot/$project" if $project;
1112 }
1113
1114 our (@snapshot_fmts, $git_avatar);
1115 sub configure_gitweb_features {
1116         # list of supported snapshot formats
1117         our @snapshot_fmts = gitweb_get_feature('snapshot');
1118         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1119
1120         # check that the avatar feature is set to a known provider name,
1121         # and for each provider check if the dependencies are satisfied.
1122         # if the provider name is invalid or the dependencies are not met,
1123         # reset $git_avatar to the empty string.
1124         our ($git_avatar) = gitweb_get_feature('avatar');
1125         if ($git_avatar eq 'gravatar') {
1126                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1127         } elsif ($git_avatar eq 'picon') {
1128                 # no dependencies
1129         } else {
1130                 $git_avatar = '';
1131         }
1132 }
1133
1134 # custom error handler: 'die <message>' is Internal Server Error
1135 sub handle_errors_html {
1136         my $msg = shift; # it is already HTML escaped
1137
1138         # to avoid infinite loop where error occurs in die_error,
1139         # change handler to default handler, disabling handle_errors_html
1140         set_message("Error occured when inside die_error:\n$msg");
1141
1142         # you cannot jump out of die_error when called as error handler;
1143         # the subroutine set via CGI::Carp::set_message is called _after_
1144         # HTTP headers are already written, so it cannot write them itself
1145         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1146 }
1147 set_message(\&handle_errors_html);
1148
1149 # dispatch
1150 sub dispatch {
1151         if (!defined $action) {
1152                 if (defined $hash) {
1153                         $action = git_get_type($hash);
1154                         $action or die_error(404, "Object does not exist");
1155                 } elsif (defined $hash_base && defined $file_name) {
1156                         $action = git_get_type("$hash_base:$file_name");
1157                         $action or die_error(404, "File or directory does not exist");
1158                 } elsif (defined $project) {
1159                         $action = 'summary';
1160                 } else {
1161                         $action = 'project_list';
1162                 }
1163         }
1164         if (!defined($actions{$action})) {
1165                 die_error(400, "Unknown action");
1166         }
1167         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1168             !$project) {
1169                 die_error(400, "Project needed");
1170         }
1171         $actions{$action}->();
1172 }
1173
1174 sub reset_timer {
1175         our $t0 = [ gettimeofday() ]
1176                 if defined $t0;
1177         our $number_of_git_cmds = 0;
1178 }
1179
1180 our $first_request = 1;
1181 sub run_request {
1182         reset_timer();
1183
1184         evaluate_uri();
1185         if ($first_request) {
1186                 evaluate_gitweb_config();
1187                 evaluate_git_version();
1188         }
1189         if ($per_request_config) {
1190                 if (ref($per_request_config) eq 'CODE') {
1191                         $per_request_config->();
1192                 } elsif (!$first_request) {
1193                         evaluate_gitweb_config();
1194                 }
1195         }
1196         check_loadavg();
1197
1198         # $projectroot and $projects_list might be set in gitweb config file
1199         $projects_list ||= $projectroot;
1200
1201         evaluate_query_params();
1202         evaluate_path_info();
1203         evaluate_and_validate_params();
1204         evaluate_git_dir();
1205
1206         configure_gitweb_features();
1207
1208         dispatch();
1209 }
1210
1211 our $is_last_request = sub { 1 };
1212 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1213 our $CGI = 'CGI';
1214 our $cgi;
1215 sub configure_as_fcgi {
1216         require CGI::Fast;
1217         our $CGI = 'CGI::Fast';
1218
1219         my $request_number = 0;
1220         # let each child service 100 requests
1221         our $is_last_request = sub { ++$request_number > 100 };
1222 }
1223 sub evaluate_argv {
1224         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1225         configure_as_fcgi()
1226                 if $script_name =~ /\.fcgi$/;
1227
1228         return unless (@ARGV);
1229
1230         require Getopt::Long;
1231         Getopt::Long::GetOptions(
1232                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1233                 'nproc|n=i' => sub {
1234                         my ($arg, $val) = @_;
1235                         return unless eval { require FCGI::ProcManager; 1; };
1236                         my $proc_manager = FCGI::ProcManager->new({
1237                                 n_processes => $val,
1238                         });
1239                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1240                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1241                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1242                 },
1243         );
1244 }
1245
1246 sub run {
1247         evaluate_argv();
1248
1249         $first_request = 1;
1250         $pre_listen_hook->()
1251                 if $pre_listen_hook;
1252
1253  REQUEST:
1254         while ($cgi = $CGI->new()) {
1255                 $pre_dispatch_hook->()
1256                         if $pre_dispatch_hook;
1257
1258                 run_request();
1259
1260                 $post_dispatch_hook->()
1261                         if $post_dispatch_hook;
1262                 $first_request = 0;
1263
1264                 last REQUEST if ($is_last_request->());
1265         }
1266
1267  DONE_GITWEB:
1268         1;
1269 }
1270
1271 run();
1272
1273 if (defined caller) {
1274         # wrapped in a subroutine processing requests,
1275         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1276         return;
1277 } else {
1278         # pure CGI script, serving single request
1279         exit;
1280 }
1281
1282 ## ======================================================================
1283 ## action links
1284
1285 # possible values of extra options
1286 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1287 # -replay => 1      - start from a current view (replay with modifications)
1288 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1289 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1290 sub href {
1291         my %params = @_;
1292         # default is to use -absolute url() i.e. $my_uri
1293         my $href = $params{-full} ? $my_url : $my_uri;
1294
1295         # implicit -replay, must be first of implicit params
1296         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1297
1298         $params{'project'} = $project unless exists $params{'project'};
1299
1300         if ($params{-replay}) {
1301                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1302                         if (!exists $params{$name}) {
1303                                 $params{$name} = $input_params{$name};
1304                         }
1305                 }
1306         }
1307
1308         my $use_pathinfo = gitweb_check_feature('pathinfo');
1309         if (defined $params{'project'} &&
1310             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1311                 # try to put as many parameters as possible in PATH_INFO:
1312                 #   - project name
1313                 #   - action
1314                 #   - hash_parent or hash_parent_base:/file_parent
1315                 #   - hash or hash_base:/filename
1316                 #   - the snapshot_format as an appropriate suffix
1317
1318                 # When the script is the root DirectoryIndex for the domain,
1319                 # $href here would be something like http://gitweb.example.com/
1320                 # Thus, we strip any trailing / from $href, to spare us double
1321                 # slashes in the final URL
1322                 $href =~ s,/$,,;
1323
1324                 # Then add the project name, if present
1325                 $href .= "/".esc_path_info($params{'project'});
1326                 delete $params{'project'};
1327
1328                 # since we destructively absorb parameters, we keep this
1329                 # boolean that remembers if we're handling a snapshot
1330                 my $is_snapshot = $params{'action'} eq 'snapshot';
1331
1332                 # Summary just uses the project path URL, any other action is
1333                 # added to the URL
1334                 if (defined $params{'action'}) {
1335                         $href .= "/".esc_path_info($params{'action'})
1336                                 unless $params{'action'} eq 'summary';
1337                         delete $params{'action'};
1338                 }
1339
1340                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1341                 # stripping nonexistent or useless pieces
1342                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1343                         || $params{'hash_parent'} || $params{'hash'});
1344                 if (defined $params{'hash_base'}) {
1345                         if (defined $params{'hash_parent_base'}) {
1346                                 $href .= esc_path_info($params{'hash_parent_base'});
1347                                 # skip the file_parent if it's the same as the file_name
1348                                 if (defined $params{'file_parent'}) {
1349                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1350                                                 delete $params{'file_parent'};
1351                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1352                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1353                                                 delete $params{'file_parent'};
1354                                         }
1355                                 }
1356                                 $href .= "..";
1357                                 delete $params{'hash_parent'};
1358                                 delete $params{'hash_parent_base'};
1359                         } elsif (defined $params{'hash_parent'}) {
1360                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1361                                 delete $params{'hash_parent'};
1362                         }
1363
1364                         $href .= esc_path_info($params{'hash_base'});
1365                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1366                                 $href .= ":/".esc_path_info($params{'file_name'});
1367                                 delete $params{'file_name'};
1368                         }
1369                         delete $params{'hash'};
1370                         delete $params{'hash_base'};
1371                 } elsif (defined $params{'hash'}) {
1372                         $href .= esc_path_info($params{'hash'});
1373                         delete $params{'hash'};
1374                 }
1375
1376                 # If the action was a snapshot, we can absorb the
1377                 # snapshot_format parameter too
1378                 if ($is_snapshot) {
1379                         my $fmt = $params{'snapshot_format'};
1380                         # snapshot_format should always be defined when href()
1381                         # is called, but just in case some code forgets, we
1382                         # fall back to the default
1383                         $fmt ||= $snapshot_fmts[0];
1384                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1385                         delete $params{'snapshot_format'};
1386                 }
1387         }
1388
1389         # now encode the parameters explicitly
1390         my @result = ();
1391         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1392                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1393                 if (defined $params{$name}) {
1394                         if (ref($params{$name}) eq "ARRAY") {
1395                                 foreach my $par (@{$params{$name}}) {
1396                                         push @result, $symbol . "=" . esc_param($par);
1397                                 }
1398                         } else {
1399                                 push @result, $symbol . "=" . esc_param($params{$name});
1400                         }
1401                 }
1402         }
1403         $href .= "?" . join(';', @result) if scalar @result;
1404
1405         # final transformation: trailing spaces must be escaped (URI-encoded)
1406         $href =~ s/(\s+)$/CGI::escape($1)/e;
1407
1408         if ($params{-anchor}) {
1409                 $href .= "#".esc_param($params{-anchor});
1410         }
1411
1412         return $href;
1413 }
1414
1415
1416 ## ======================================================================
1417 ## validation, quoting/unquoting and escaping
1418
1419 sub validate_action {
1420         my $input = shift || return undef;
1421         return undef unless exists $actions{$input};
1422         return $input;
1423 }
1424
1425 sub validate_project {
1426         my $input = shift || return undef;
1427         if (!validate_pathname($input) ||
1428                 !(-d "$projectroot/$input") ||
1429                 !check_export_ok("$projectroot/$input") ||
1430                 ($strict_export && !project_in_list($input))) {
1431                 return undef;
1432         } else {
1433                 return $input;
1434         }
1435 }
1436
1437 sub validate_pathname {
1438         my $input = shift || return undef;
1439
1440         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1441         # at the beginning, at the end, and between slashes.
1442         # also this catches doubled slashes
1443         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1444                 return undef;
1445         }
1446         # no null characters
1447         if ($input =~ m!\0!) {
1448                 return undef;
1449         }
1450         return $input;
1451 }
1452
1453 sub validate_refname {
1454         my $input = shift || return undef;
1455
1456         # textual hashes are O.K.
1457         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1458                 return $input;
1459         }
1460         # it must be correct pathname
1461         $input = validate_pathname($input)
1462                 or return undef;
1463         # restrictions on ref name according to git-check-ref-format
1464         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1465                 return undef;
1466         }
1467         return $input;
1468 }
1469
1470 # decode sequences of octets in utf8 into Perl's internal form,
1471 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1472 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1473 sub to_utf8 {
1474         my $str = shift;
1475         return undef unless defined $str;
1476
1477         if (utf8::is_utf8($str) || utf8::decode($str)) {
1478                 return $str;
1479         } else {
1480                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1481         }
1482 }
1483
1484 # quote unsafe chars, but keep the slash, even when it's not
1485 # correct, but quoted slashes look too horrible in bookmarks
1486 sub esc_param {
1487         my $str = shift;
1488         return undef unless defined $str;
1489         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1490         $str =~ s/ /\+/g;
1491         return $str;
1492 }
1493
1494 # the quoting rules for path_info fragment are slightly different
1495 sub esc_path_info {
1496         my $str = shift;
1497         return undef unless defined $str;
1498
1499         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1500         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1501
1502         return $str;
1503 }
1504
1505 # quote unsafe chars in whole URL, so some characters cannot be quoted
1506 sub esc_url {
1507         my $str = shift;
1508         return undef unless defined $str;
1509         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1510         $str =~ s/ /\+/g;
1511         return $str;
1512 }
1513
1514 # quote unsafe characters in HTML attributes
1515 sub esc_attr {
1516
1517         # for XHTML conformance escaping '"' to '&quot;' is not enough
1518         return esc_html(@_);
1519 }
1520
1521 # replace invalid utf8 character with SUBSTITUTION sequence
1522 sub esc_html {
1523         my $str = shift;
1524         my %opts = @_;
1525
1526         return undef unless defined $str;
1527
1528         $str = to_utf8($str);
1529         $str = $cgi->escapeHTML($str);
1530         if ($opts{'-nbsp'}) {
1531                 $str =~ s/ /&nbsp;/g;
1532         }
1533         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1534         return $str;
1535 }
1536
1537 # quote control characters and escape filename to HTML
1538 sub esc_path {
1539         my $str = shift;
1540         my %opts = @_;
1541
1542         return undef unless defined $str;
1543
1544         $str = to_utf8($str);
1545         $str = $cgi->escapeHTML($str);
1546         if ($opts{'-nbsp'}) {
1547                 $str =~ s/ /&nbsp;/g;
1548         }
1549         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1550         return $str;
1551 }
1552
1553 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1554 sub sanitize {
1555         my $str = shift;
1556
1557         return undef unless defined $str;
1558
1559         $str = to_utf8($str);
1560         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1561         return $str;
1562 }
1563
1564 # Make control characters "printable", using character escape codes (CEC)
1565 sub quot_cec {
1566         my $cntrl = shift;
1567         my %opts = @_;
1568         my %es = ( # character escape codes, aka escape sequences
1569                 "\t" => '\t',   # tab            (HT)
1570                 "\n" => '\n',   # line feed      (LF)
1571                 "\r" => '\r',   # carrige return (CR)
1572                 "\f" => '\f',   # form feed      (FF)
1573                 "\b" => '\b',   # backspace      (BS)
1574                 "\a" => '\a',   # alarm (bell)   (BEL)
1575                 "\e" => '\e',   # escape         (ESC)
1576                 "\013" => '\v', # vertical tab   (VT)
1577                 "\000" => '\0', # nul character  (NUL)
1578         );
1579         my $chr = ( (exists $es{$cntrl})
1580                     ? $es{$cntrl}
1581                     : sprintf('\%2x', ord($cntrl)) );
1582         if ($opts{-nohtml}) {
1583                 return $chr;
1584         } else {
1585                 return "<span class=\"cntrl\">$chr</span>";
1586         }
1587 }
1588
1589 # Alternatively use unicode control pictures codepoints,
1590 # Unicode "printable representation" (PR)
1591 sub quot_upr {
1592         my $cntrl = shift;
1593         my %opts = @_;
1594
1595         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1596         if ($opts{-nohtml}) {
1597                 return $chr;
1598         } else {
1599                 return "<span class=\"cntrl\">$chr</span>";
1600         }
1601 }
1602
1603 # git may return quoted and escaped filenames
1604 sub unquote {
1605         my $str = shift;
1606
1607         sub unq {
1608                 my $seq = shift;
1609                 my %es = ( # character escape codes, aka escape sequences
1610                         't' => "\t",   # tab            (HT, TAB)
1611                         'n' => "\n",   # newline        (NL)
1612                         'r' => "\r",   # return         (CR)
1613                         'f' => "\f",   # form feed      (FF)
1614                         'b' => "\b",   # backspace      (BS)
1615                         'a' => "\a",   # alarm (bell)   (BEL)
1616                         'e' => "\e",   # escape         (ESC)
1617                         'v' => "\013", # vertical tab   (VT)
1618                 );
1619
1620                 if ($seq =~ m/^[0-7]{1,3}$/) {
1621                         # octal char sequence
1622                         return chr(oct($seq));
1623                 } elsif (exists $es{$seq}) {
1624                         # C escape sequence, aka character escape code
1625                         return $es{$seq};
1626                 }
1627                 # quoted ordinary character
1628                 return $seq;
1629         }
1630
1631         if ($str =~ m/^"(.*)"$/) {
1632                 # needs unquoting
1633                 $str = $1;
1634                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1635         }
1636         return $str;
1637 }
1638
1639 # escape tabs (convert tabs to spaces)
1640 sub untabify {
1641         my $line = shift;
1642
1643         while ((my $pos = index($line, "\t")) != -1) {
1644                 if (my $count = (8 - ($pos % 8))) {
1645                         my $spaces = ' ' x $count;
1646                         $line =~ s/\t/$spaces/;
1647                 }
1648         }
1649
1650         return $line;
1651 }
1652
1653 sub project_in_list {
1654         my $project = shift;
1655         my @list = git_get_projects_list();
1656         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1657 }
1658
1659 ## ----------------------------------------------------------------------
1660 ## HTML aware string manipulation
1661
1662 # Try to chop given string on a word boundary between position
1663 # $len and $len+$add_len. If there is no word boundary there,
1664 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1665 # (marking chopped part) would be longer than given string.
1666 sub chop_str {
1667         my $str = shift;
1668         my $len = shift;
1669         my $add_len = shift || 10;
1670         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1671
1672         # Make sure perl knows it is utf8 encoded so we don't
1673         # cut in the middle of a utf8 multibyte char.
1674         $str = to_utf8($str);
1675
1676         # allow only $len chars, but don't cut a word if it would fit in $add_len
1677         # if it doesn't fit, cut it if it's still longer than the dots we would add
1678         # remove chopped character entities entirely
1679
1680         # when chopping in the middle, distribute $len into left and right part
1681         # return early if chopping wouldn't make string shorter
1682         if ($where eq 'center') {
1683                 return $str if ($len + 5 >= length($str)); # filler is length 5
1684                 $len = int($len/2);
1685         } else {
1686                 return $str if ($len + 4 >= length($str)); # filler is length 4
1687         }
1688
1689         # regexps: ending and beginning with word part up to $add_len
1690         my $endre = qr/.{$len}\w{0,$add_len}/;
1691         my $begre = qr/\w{0,$add_len}.{$len}/;
1692
1693         if ($where eq 'left') {
1694                 $str =~ m/^(.*?)($begre)$/;
1695                 my ($lead, $body) = ($1, $2);
1696                 if (length($lead) > 4) {
1697                         $lead = " ...";
1698                 }
1699                 return "$lead$body";
1700
1701         } elsif ($where eq 'center') {
1702                 $str =~ m/^($endre)(.*)$/;
1703                 my ($left, $str)  = ($1, $2);
1704                 $str =~ m/^(.*?)($begre)$/;
1705                 my ($mid, $right) = ($1, $2);
1706                 if (length($mid) > 5) {
1707                         $mid = " ... ";
1708                 }
1709                 return "$left$mid$right";
1710
1711         } else {
1712                 $str =~ m/^($endre)(.*)$/;
1713                 my $body = $1;
1714                 my $tail = $2;
1715                 if (length($tail) > 4) {
1716                         $tail = "... ";
1717                 }
1718                 return "$body$tail";
1719         }
1720 }
1721
1722 # takes the same arguments as chop_str, but also wraps a <span> around the
1723 # result with a title attribute if it does get chopped. Additionally, the
1724 # string is HTML-escaped.
1725 sub chop_and_escape_str {
1726         my ($str) = @_;
1727
1728         my $chopped = chop_str(@_);
1729         $str = to_utf8($str);
1730         if ($chopped eq $str) {
1731                 return esc_html($chopped);
1732         } else {
1733                 $str =~ s/[[:cntrl:]]/?/g;
1734                 return $cgi->span({-title=>$str}, esc_html($chopped));
1735         }
1736 }
1737
1738 # Highlight selected fragments of string, using given CSS class,
1739 # and escape HTML.  It is assumed that fragments do not overlap.
1740 # Regions are passed as list of pairs (array references).
1741 #
1742 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1743 # '<span class="mark">foo</span>bar'
1744 sub esc_html_hl_regions {
1745         my ($str, $css_class, @sel) = @_;
1746         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1747         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1748         return esc_html($str, %opts) unless @sel;
1749
1750         my $out = '';
1751         my $pos = 0;
1752
1753         for my $s (@sel) {
1754                 my ($begin, $end) = @$s;
1755
1756                 # Don't create empty <span> elements.
1757                 next if $end <= $begin;
1758
1759                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1760                                        %opts);
1761
1762                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1763                         if ($begin - $pos > 0);
1764                 $out .= $cgi->span({-class => $css_class}, $escaped);
1765
1766                 $pos = $end;
1767         }
1768         $out .= esc_html(substr($str, $pos), %opts)
1769                 if ($pos < length($str));
1770
1771         return $out;
1772 }
1773
1774 # return positions of beginning and end of each match
1775 sub matchpos_list {
1776         my ($str, $regexp) = @_;
1777         return unless (defined $str && defined $regexp);
1778
1779         my @matches;
1780         while ($str =~ /$regexp/g) {
1781                 push @matches, [$-[0], $+[0]];
1782         }
1783         return @matches;
1784 }
1785
1786 # highlight match (if any), and escape HTML
1787 sub esc_html_match_hl {
1788         my ($str, $regexp) = @_;
1789         return esc_html($str) unless defined $regexp;
1790
1791         my @matches = matchpos_list($str, $regexp);
1792         return esc_html($str) unless @matches;
1793
1794         return esc_html_hl_regions($str, 'match', @matches);
1795 }
1796
1797
1798 # highlight match (if any) of shortened string, and escape HTML
1799 sub esc_html_match_hl_chopped {
1800         my ($str, $chopped, $regexp) = @_;
1801         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1802
1803         my @matches = matchpos_list($str, $regexp);
1804         return esc_html($chopped) unless @matches;
1805
1806         # filter matches so that we mark chopped string
1807         my $tail = "... "; # see chop_str
1808         unless ($chopped =~ s/\Q$tail\E$//) {
1809                 $tail = '';
1810         }
1811         my $chop_len = length($chopped);
1812         my $tail_len = length($tail);
1813         my @filtered;
1814
1815         for my $m (@matches) {
1816                 if ($m->[0] > $chop_len) {
1817                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1818                         last;
1819                 } elsif ($m->[1] > $chop_len) {
1820                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1821                         last;
1822                 }
1823                 push @filtered, $m;
1824         }
1825
1826         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1827 }
1828
1829 ## ----------------------------------------------------------------------
1830 ## functions returning short strings
1831
1832 # CSS class for given age value (in seconds)
1833 sub age_class {
1834         my $age = shift;
1835
1836         if (!defined $age) {
1837                 return "noage";
1838         } elsif ($age < 60*60*2) {
1839                 return "age0";
1840         } elsif ($age < 60*60*24*2) {
1841                 return "age1";
1842         } else {
1843                 return "age2";
1844         }
1845 }
1846
1847 # convert age in seconds to "nn units ago" string
1848 sub age_string {
1849         my $age = shift;
1850         my $age_str;
1851
1852         if ($age > 60*60*24*365*2) {
1853                 $age_str = (int $age/60/60/24/365);
1854                 $age_str .= " years ago";
1855         } elsif ($age > 60*60*24*(365/12)*2) {
1856                 $age_str = int $age/60/60/24/(365/12);
1857                 $age_str .= " months ago";
1858         } elsif ($age > 60*60*24*7*2) {
1859                 $age_str = int $age/60/60/24/7;
1860                 $age_str .= " weeks ago";
1861         } elsif ($age > 60*60*24*2) {
1862                 $age_str = int $age/60/60/24;
1863                 $age_str .= " days ago";
1864         } elsif ($age > 60*60*2) {
1865                 $age_str = int $age/60/60;
1866                 $age_str .= " hours ago";
1867         } elsif ($age > 60*2) {
1868                 $age_str = int $age/60;
1869                 $age_str .= " min ago";
1870         } elsif ($age > 2) {
1871                 $age_str = int $age;
1872                 $age_str .= " sec ago";
1873         } else {
1874                 $age_str .= " right now";
1875         }
1876         return $age_str;
1877 }
1878
1879 use constant {
1880         S_IFINVALID => 0030000,
1881         S_IFGITLINK => 0160000,
1882 };
1883
1884 # submodule/subproject, a commit object reference
1885 sub S_ISGITLINK {
1886         my $mode = shift;
1887
1888         return (($mode & S_IFMT) == S_IFGITLINK)
1889 }
1890
1891 # convert file mode in octal to symbolic file mode string
1892 sub mode_str {
1893         my $mode = oct shift;
1894
1895         if (S_ISGITLINK($mode)) {
1896                 return 'm---------';
1897         } elsif (S_ISDIR($mode & S_IFMT)) {
1898                 return 'drwxr-xr-x';
1899         } elsif (S_ISLNK($mode)) {
1900                 return 'lrwxrwxrwx';
1901         } elsif (S_ISREG($mode)) {
1902                 # git cares only about the executable bit
1903                 if ($mode & S_IXUSR) {
1904                         return '-rwxr-xr-x';
1905                 } else {
1906                         return '-rw-r--r--';
1907                 };
1908         } else {
1909                 return '----------';
1910         }
1911 }
1912
1913 # convert file mode in octal to file type string
1914 sub file_type {
1915         my $mode = shift;
1916
1917         if ($mode !~ m/^[0-7]+$/) {
1918                 return $mode;
1919         } else {
1920                 $mode = oct $mode;
1921         }
1922
1923         if (S_ISGITLINK($mode)) {
1924                 return "submodule";
1925         } elsif (S_ISDIR($mode & S_IFMT)) {
1926                 return "directory";
1927         } elsif (S_ISLNK($mode)) {
1928                 return "symlink";
1929         } elsif (S_ISREG($mode)) {
1930                 return "file";
1931         } else {
1932                 return "unknown";
1933         }
1934 }
1935
1936 # convert file mode in octal to file type description string
1937 sub file_type_long {
1938         my $mode = shift;
1939
1940         if ($mode !~ m/^[0-7]+$/) {
1941                 return $mode;
1942         } else {
1943                 $mode = oct $mode;
1944         }
1945
1946         if (S_ISGITLINK($mode)) {
1947                 return "submodule";
1948         } elsif (S_ISDIR($mode & S_IFMT)) {
1949                 return "directory";
1950         } elsif (S_ISLNK($mode)) {
1951                 return "symlink";
1952         } elsif (S_ISREG($mode)) {
1953                 if ($mode & S_IXUSR) {
1954                         return "executable";
1955                 } else {
1956                         return "file";
1957                 };
1958         } else {
1959                 return "unknown";
1960         }
1961 }
1962
1963
1964 ## ----------------------------------------------------------------------
1965 ## functions returning short HTML fragments, or transforming HTML fragments
1966 ## which don't belong to other sections
1967
1968 # format line of commit message.
1969 sub format_log_line_html {
1970         my $line = shift;
1971
1972         $line = esc_html($line, -nbsp=>1);
1973         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1974                 $cgi->a({-href => href(action=>"object", hash=>$1),
1975                                         -class => "text"}, $1);
1976         }eg;
1977
1978         return $line;
1979 }
1980
1981 # format marker of refs pointing to given object
1982
1983 # the destination action is chosen based on object type and current context:
1984 # - for annotated tags, we choose the tag view unless it's the current view
1985 #   already, in which case we go to shortlog view
1986 # - for other refs, we keep the current view if we're in history, shortlog or
1987 #   log view, and select shortlog otherwise
1988 sub format_ref_marker {
1989         my ($refs, $id) = @_;
1990         my $markers = '';
1991
1992         if (defined $refs->{$id}) {
1993                 foreach my $ref (@{$refs->{$id}}) {
1994                         # this code exploits the fact that non-lightweight tags are the
1995                         # only indirect objects, and that they are the only objects for which
1996                         # we want to use tag instead of shortlog as action
1997                         my ($type, $name) = qw();
1998                         my $indirect = ($ref =~ s/\^\{\}$//);
1999                         # e.g. tags/v2.6.11 or heads/next
2000                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2001                                 $type = $1;
2002                                 $name = $2;
2003                         } else {
2004                                 $type = "ref";
2005                                 $name = $ref;
2006                         }
2007
2008                         my $class = $type;
2009                         $class .= " indirect" if $indirect;
2010
2011                         my $dest_action = "shortlog";
2012
2013                         if ($indirect) {
2014                                 $dest_action = "tag" unless $action eq "tag";
2015                         } elsif ($action =~ /^(history|(short)?log)$/) {
2016                                 $dest_action = $action;
2017                         }
2018
2019                         my $dest = "";
2020                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2021                         $dest .= $ref;
2022
2023                         my $link = $cgi->a({
2024                                 -href => href(
2025                                         action=>$dest_action,
2026                                         hash=>$dest
2027                                 )}, $name);
2028
2029                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2030                                 $link . "</span>";
2031                 }
2032         }
2033
2034         if ($markers) {
2035                 return ' <span class="refs">'. $markers . '</span>';
2036         } else {
2037                 return "";
2038         }
2039 }
2040
2041 # format, perhaps shortened and with markers, title line
2042 sub format_subject_html {
2043         my ($long, $short, $href, $extra) = @_;
2044         $extra = '' unless defined($extra);
2045
2046         if (length($short) < length($long)) {
2047                 $long =~ s/[[:cntrl:]]/?/g;
2048                 return $cgi->a({-href => $href, -class => "list subject",
2049                                 -title => to_utf8($long)},
2050                        esc_html($short)) . $extra;
2051         } else {
2052                 return $cgi->a({-href => $href, -class => "list subject"},
2053                        esc_html($long)) . $extra;
2054         }
2055 }
2056
2057 # Rather than recomputing the url for an email multiple times, we cache it
2058 # after the first hit. This gives a visible benefit in views where the avatar
2059 # for the same email is used repeatedly (e.g. shortlog).
2060 # The cache is shared by all avatar engines (currently gravatar only), which
2061 # are free to use it as preferred. Since only one avatar engine is used for any
2062 # given page, there's no risk for cache conflicts.
2063 our %avatar_cache = ();
2064
2065 # Compute the picon url for a given email, by using the picon search service over at
2066 # http://www.cs.indiana.edu/picons/search.html
2067 sub picon_url {
2068         my $email = lc shift;
2069         if (!$avatar_cache{$email}) {
2070                 my ($user, $domain) = split('@', $email);
2071                 $avatar_cache{$email} =
2072                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2073                         "$domain/$user/" .
2074                         "users+domains+unknown/up/single";
2075         }
2076         return $avatar_cache{$email};
2077 }
2078
2079 # Compute the gravatar url for a given email, if it's not in the cache already.
2080 # Gravatar stores only the part of the URL before the size, since that's the
2081 # one computationally more expensive. This also allows reuse of the cache for
2082 # different sizes (for this particular engine).
2083 sub gravatar_url {
2084         my $email = lc shift;
2085         my $size = shift;
2086         $avatar_cache{$email} ||=
2087                 "http://www.gravatar.com/avatar/" .
2088                         Digest::MD5::md5_hex($email) . "?s=";
2089         return $avatar_cache{$email} . $size;
2090 }
2091
2092 # Insert an avatar for the given $email at the given $size if the feature
2093 # is enabled.
2094 sub git_get_avatar {
2095         my ($email, %opts) = @_;
2096         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2097         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2098         $opts{-size} ||= 'default';
2099         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2100         my $url = "";
2101         if ($git_avatar eq 'gravatar') {
2102                 $url = gravatar_url($email, $size);
2103         } elsif ($git_avatar eq 'picon') {
2104                 $url = picon_url($email);
2105         }
2106         # Other providers can be added by extending the if chain, defining $url
2107         # as needed. If no variant puts something in $url, we assume avatars
2108         # are completely disabled/unavailable.
2109         if ($url) {
2110                 return $pre_white .
2111                        "<img width=\"$size\" " .
2112                             "class=\"avatar\" " .
2113                             "src=\"".esc_url($url)."\" " .
2114                             "alt=\"\" " .
2115                        "/>" . $post_white;
2116         } else {
2117                 return "";
2118         }
2119 }
2120
2121 sub format_search_author {
2122         my ($author, $searchtype, $displaytext) = @_;
2123         my $have_search = gitweb_check_feature('search');
2124
2125         if ($have_search) {
2126                 my $performed = "";
2127                 if ($searchtype eq 'author') {
2128                         $performed = "authored";
2129                 } elsif ($searchtype eq 'committer') {
2130                         $performed = "committed";
2131                 }
2132
2133                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2134                                 searchtext=>$author,
2135                                 searchtype=>$searchtype), class=>"list",
2136                                 title=>"Search for commits $performed by $author"},
2137                                 $displaytext);
2138
2139         } else {
2140                 return $displaytext;
2141         }
2142 }
2143
2144 # format the author name of the given commit with the given tag
2145 # the author name is chopped and escaped according to the other
2146 # optional parameters (see chop_str).
2147 sub format_author_html {
2148         my $tag = shift;
2149         my $co = shift;
2150         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2151         return "<$tag class=\"author\">" .
2152                format_search_author($co->{'author_name'}, "author",
2153                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2154                        $author) .
2155                "</$tag>";
2156 }
2157
2158 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2159 sub format_git_diff_header_line {
2160         my $line = shift;
2161         my $diffinfo = shift;
2162         my ($from, $to) = @_;
2163
2164         if ($diffinfo->{'nparents'}) {
2165                 # combined diff
2166                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2167                 if ($to->{'href'}) {
2168                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2169                                          esc_path($to->{'file'}));
2170                 } else { # file was deleted (no href)
2171                         $line .= esc_path($to->{'file'});
2172                 }
2173         } else {
2174                 # "ordinary" diff
2175                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2176                 if ($from->{'href'}) {
2177                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2178                                          'a/' . esc_path($from->{'file'}));
2179                 } else { # file was added (no href)
2180                         $line .= 'a/' . esc_path($from->{'file'});
2181                 }
2182                 $line .= ' ';
2183                 if ($to->{'href'}) {
2184                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2185                                          'b/' . esc_path($to->{'file'}));
2186                 } else { # file was deleted
2187                         $line .= 'b/' . esc_path($to->{'file'});
2188                 }
2189         }
2190
2191         return "<div class=\"diff header\">$line</div>\n";
2192 }
2193
2194 # format extended diff header line, before patch itself
2195 sub format_extended_diff_header_line {
2196         my $line = shift;
2197         my $diffinfo = shift;
2198         my ($from, $to) = @_;
2199
2200         # match <path>
2201         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2202                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2203                                        esc_path($from->{'file'}));
2204         }
2205         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2206                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2207                                  esc_path($to->{'file'}));
2208         }
2209         # match single <mode>
2210         if ($line =~ m/\s(\d{6})$/) {
2211                 $line .= '<span class="info"> (' .
2212                          file_type_long($1) .
2213                          ')</span>';
2214         }
2215         # match <hash>
2216         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2217                 # can match only for combined diff
2218                 $line = 'index ';
2219                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2220                         if ($from->{'href'}[$i]) {
2221                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2222                                                   -class=>"hash"},
2223                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2224                         } else {
2225                                 $line .= '0' x 7;
2226                         }
2227                         # separator
2228                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2229                 }
2230                 $line .= '..';
2231                 if ($to->{'href'}) {
2232                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2233                                          substr($diffinfo->{'to_id'},0,7));
2234                 } else {
2235                         $line .= '0' x 7;
2236                 }
2237
2238         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2239                 # can match only for ordinary diff
2240                 my ($from_link, $to_link);
2241                 if ($from->{'href'}) {
2242                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2243                                              substr($diffinfo->{'from_id'},0,7));
2244                 } else {
2245                         $from_link = '0' x 7;
2246                 }
2247                 if ($to->{'href'}) {
2248                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2249                                            substr($diffinfo->{'to_id'},0,7));
2250                 } else {
2251                         $to_link = '0' x 7;
2252                 }
2253                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2254                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2255         }
2256
2257         return $line . "<br/>\n";
2258 }
2259
2260 # format from-file/to-file diff header
2261 sub format_diff_from_to_header {
2262         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2263         my $line;
2264         my $result = '';
2265
2266         $line = $from_line;
2267         #assert($line =~ m/^---/) if DEBUG;
2268         # no extra formatting for "^--- /dev/null"
2269         if (! $diffinfo->{'nparents'}) {
2270                 # ordinary (single parent) diff
2271                 if ($line =~ m!^--- "?a/!) {
2272                         if ($from->{'href'}) {
2273                                 $line = '--- a/' .
2274                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2275                                                 esc_path($from->{'file'}));
2276                         } else {
2277                                 $line = '--- a/' .
2278                                         esc_path($from->{'file'});
2279                         }
2280                 }
2281                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2282
2283         } else {
2284                 # combined diff (merge commit)
2285                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2286                         if ($from->{'href'}[$i]) {
2287                                 $line = '--- ' .
2288                                         $cgi->a({-href=>href(action=>"blobdiff",
2289                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2290                                                              hash_parent_base=>$parents[$i],
2291                                                              file_parent=>$from->{'file'}[$i],
2292                                                              hash=>$diffinfo->{'to_id'},
2293                                                              hash_base=>$hash,
2294                                                              file_name=>$to->{'file'}),
2295                                                  -class=>"path",
2296                                                  -title=>"diff" . ($i+1)},
2297                                                 $i+1) .
2298                                         '/' .
2299                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2300                                                 esc_path($from->{'file'}[$i]));
2301                         } else {
2302                                 $line = '--- /dev/null';
2303                         }
2304                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2305                 }
2306         }
2307
2308         $line = $to_line;
2309         #assert($line =~ m/^\+\+\+/) if DEBUG;
2310         # no extra formatting for "^+++ /dev/null"
2311         if ($line =~ m!^\+\+\+ "?b/!) {
2312                 if ($to->{'href'}) {
2313                         $line = '+++ b/' .
2314                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2315                                         esc_path($to->{'file'}));
2316                 } else {
2317                         $line = '+++ b/' .
2318                                 esc_path($to->{'file'});
2319                 }
2320         }
2321         $result .= qq!<div class="diff to_file">$line</div>\n!;
2322
2323         return $result;
2324 }
2325
2326 # create note for patch simplified by combined diff
2327 sub format_diff_cc_simplified {
2328         my ($diffinfo, @parents) = @_;
2329         my $result = '';
2330
2331         $result .= "<div class=\"diff header\">" .
2332                    "diff --cc ";
2333         if (!is_deleted($diffinfo)) {
2334                 $result .= $cgi->a({-href => href(action=>"blob",
2335                                                   hash_base=>$hash,
2336                                                   hash=>$diffinfo->{'to_id'},
2337                                                   file_name=>$diffinfo->{'to_file'}),
2338                                     -class => "path"},
2339                                    esc_path($diffinfo->{'to_file'}));
2340         } else {
2341                 $result .= esc_path($diffinfo->{'to_file'});
2342         }
2343         $result .= "</div>\n" . # class="diff header"
2344                    "<div class=\"diff nodifferences\">" .
2345                    "Simple merge" .
2346                    "</div>\n"; # class="diff nodifferences"
2347
2348         return $result;
2349 }
2350
2351 sub diff_line_class {
2352         my ($line, $from, $to) = @_;
2353
2354         # ordinary diff
2355         my $num_sign = 1;
2356         # combined diff
2357         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2358                 $num_sign = scalar @{$from->{'href'}};
2359         }
2360
2361         my @diff_line_classifier = (
2362                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2363                 { regexp => qr/^\\/,               class => "incomplete"  },
2364                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2365                 # classifier for context must come before classifier add/rem,
2366                 # or we would have to use more complicated regexp, for example
2367                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2368                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2369                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2370         );
2371         for my $clsfy (@diff_line_classifier) {
2372                 return $clsfy->{'class'}
2373                         if ($line =~ $clsfy->{'regexp'});
2374         }
2375
2376         # fallback
2377         return "";
2378 }
2379
2380 # assumes that $from and $to are defined and correctly filled,
2381 # and that $line holds a line of chunk header for unified diff
2382 sub format_unidiff_chunk_header {
2383         my ($line, $from, $to) = @_;
2384
2385         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2386                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2387
2388         $from_lines = 0 unless defined $from_lines;
2389         $to_lines   = 0 unless defined $to_lines;
2390
2391         if ($from->{'href'}) {
2392                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2393                                      -class=>"list"}, $from_text);
2394         }
2395         if ($to->{'href'}) {
2396                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2397                                      -class=>"list"}, $to_text);
2398         }
2399         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2400                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2401         return $line;
2402 }
2403
2404 # assumes that $from and $to are defined and correctly filled,
2405 # and that $line holds a line of chunk header for combined diff
2406 sub format_cc_diff_chunk_header {
2407         my ($line, $from, $to) = @_;
2408
2409         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2410         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2411
2412         @from_text = split(' ', $ranges);
2413         for (my $i = 0; $i < @from_text; ++$i) {
2414                 ($from_start[$i], $from_nlines[$i]) =
2415                         (split(',', substr($from_text[$i], 1)), 0);
2416         }
2417
2418         $to_text   = pop @from_text;
2419         $to_start  = pop @from_start;
2420         $to_nlines = pop @from_nlines;
2421
2422         $line = "<span class=\"chunk_info\">$prefix ";
2423         for (my $i = 0; $i < @from_text; ++$i) {
2424                 if ($from->{'href'}[$i]) {
2425                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2426                                           -class=>"list"}, $from_text[$i]);
2427                 } else {
2428                         $line .= $from_text[$i];
2429                 }
2430                 $line .= " ";
2431         }
2432         if ($to->{'href'}) {
2433                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2434                                   -class=>"list"}, $to_text);
2435         } else {
2436                 $line .= $to_text;
2437         }
2438         $line .= " $prefix</span>" .
2439                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2440         return $line;
2441 }
2442
2443 # process patch (diff) line (not to be used for diff headers),
2444 # returning HTML-formatted (but not wrapped) line.
2445 # If the line is passed as a reference, it is treated as HTML and not
2446 # esc_html()'ed.
2447 sub format_diff_line {
2448         my ($line, $diff_class, $from, $to) = @_;
2449
2450         if (ref($line)) {
2451                 $line = $$line;
2452         } else {
2453                 chomp $line;
2454                 $line = untabify($line);
2455
2456                 if ($from && $to && $line =~ m/^\@{2} /) {
2457                         $line = format_unidiff_chunk_header($line, $from, $to);
2458                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2459                         $line = format_cc_diff_chunk_header($line, $from, $to);
2460                 } else {
2461                         $line = esc_html($line, -nbsp=>1);
2462                 }
2463         }
2464
2465         my $diff_classes = "diff";
2466         $diff_classes .= " $diff_class" if ($diff_class);
2467         $line = "<div class=\"$diff_classes\">$line</div>\n";
2468
2469         return $line;
2470 }
2471
2472 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2473 # linked.  Pass the hash of the tree/commit to snapshot.
2474 sub format_snapshot_links {
2475         my ($hash) = @_;
2476         my $num_fmts = @snapshot_fmts;
2477         if ($num_fmts > 1) {
2478                 # A parenthesized list of links bearing format names.
2479                 # e.g. "snapshot (_tar.gz_ _zip_)"
2480                 return "snapshot (" . join(' ', map
2481                         $cgi->a({
2482                                 -href => href(
2483                                         action=>"snapshot",
2484                                         hash=>$hash,
2485                                         snapshot_format=>$_
2486                                 )
2487                         }, $known_snapshot_formats{$_}{'display'})
2488                 , @snapshot_fmts) . ")";
2489         } elsif ($num_fmts == 1) {
2490                 # A single "snapshot" link whose tooltip bears the format name.
2491                 # i.e. "_snapshot_"
2492                 my ($fmt) = @snapshot_fmts;
2493                 return
2494                         $cgi->a({
2495                                 -href => href(
2496                                         action=>"snapshot",
2497                                         hash=>$hash,
2498                                         snapshot_format=>$fmt
2499                                 ),
2500                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2501                         }, "snapshot");
2502         } else { # $num_fmts == 0
2503                 return undef;
2504         }
2505 }
2506
2507 ## ......................................................................
2508 ## functions returning values to be passed, perhaps after some
2509 ## transformation, to other functions; e.g. returning arguments to href()
2510
2511 # returns hash to be passed to href to generate gitweb URL
2512 # in -title key it returns description of link
2513 sub get_feed_info {
2514         my $format = shift || 'Atom';
2515         my %res = (action => lc($format));
2516
2517         # feed links are possible only for project views
2518         return unless (defined $project);
2519         # some views should link to OPML, or to generic project feed,
2520         # or don't have specific feed yet (so they should use generic)
2521         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2522
2523         my $branch;
2524         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2525         # from tag links; this also makes possible to detect branch links
2526         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2527             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2528                 $branch = $1;
2529         }
2530         # find log type for feed description (title)
2531         my $type = 'log';
2532         if (defined $file_name) {
2533                 $type  = "history of $file_name";
2534                 $type .= "/" if ($action eq 'tree');
2535                 $type .= " on '$branch'" if (defined $branch);
2536         } else {
2537                 $type = "log of $branch" if (defined $branch);
2538         }
2539
2540         $res{-title} = $type;
2541         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2542         $res{'file_name'} = $file_name;
2543
2544         return %res;
2545 }
2546
2547 ## ----------------------------------------------------------------------
2548 ## git utility subroutines, invoking git commands
2549
2550 # returns path to the core git executable and the --git-dir parameter as list
2551 sub git_cmd {
2552         $number_of_git_cmds++;
2553         return $GIT, '--git-dir='.$git_dir;
2554 }
2555
2556 # quote the given arguments for passing them to the shell
2557 # quote_command("command", "arg 1", "arg with ' and ! characters")
2558 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2559 # Try to avoid using this function wherever possible.
2560 sub quote_command {
2561         return join(' ',
2562                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2563 }
2564
2565 # get HEAD ref of given project as hash
2566 sub git_get_head_hash {
2567         return git_get_full_hash(shift, 'HEAD');
2568 }
2569
2570 sub git_get_full_hash {
2571         return git_get_hash(@_);
2572 }
2573
2574 sub git_get_short_hash {
2575         return git_get_hash(@_, '--short=7');
2576 }
2577
2578 sub git_get_hash {
2579         my ($project, $hash, @options) = @_;
2580         my $o_git_dir = $git_dir;
2581         my $retval = undef;
2582         $git_dir = "$projectroot/$project";
2583         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2584             '--verify', '-q', @options, $hash) {
2585                 $retval = <$fd>;
2586                 chomp $retval if defined $retval;
2587                 close $fd;
2588         }
2589         if (defined $o_git_dir) {
2590                 $git_dir = $o_git_dir;
2591         }
2592         return $retval;
2593 }
2594
2595 # get type of given object
2596 sub git_get_type {
2597         my $hash = shift;
2598
2599         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2600         my $type = <$fd>;
2601         close $fd or return;
2602         chomp $type;
2603         return $type;
2604 }
2605
2606 # repository configuration
2607 our $config_file = '';
2608 our %config;
2609
2610 # store multiple values for single key as anonymous array reference
2611 # single values stored directly in the hash, not as [ <value> ]
2612 sub hash_set_multi {
2613         my ($hash, $key, $value) = @_;
2614
2615         if (!exists $hash->{$key}) {
2616                 $hash->{$key} = $value;
2617         } elsif (!ref $hash->{$key}) {
2618                 $hash->{$key} = [ $hash->{$key}, $value ];
2619         } else {
2620                 push @{$hash->{$key}}, $value;
2621         }
2622 }
2623
2624 # return hash of git project configuration
2625 # optionally limited to some section, e.g. 'gitweb'
2626 sub git_parse_project_config {
2627         my $section_regexp = shift;
2628         my %config;
2629
2630         local $/ = "\0";
2631
2632         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2633                 or return;
2634
2635         while (my $keyval = <$fh>) {
2636                 chomp $keyval;
2637                 my ($key, $value) = split(/\n/, $keyval, 2);
2638
2639                 hash_set_multi(\%config, $key, $value)
2640                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2641         }
2642         close $fh;
2643
2644         return %config;
2645 }
2646
2647 # convert config value to boolean: 'true' or 'false'
2648 # no value, number > 0, 'true' and 'yes' values are true
2649 # rest of values are treated as false (never as error)
2650 sub config_to_bool {
2651         my $val = shift;
2652
2653         return 1 if !defined $val;             # section.key
2654
2655         # strip leading and trailing whitespace
2656         $val =~ s/^\s+//;
2657         $val =~ s/\s+$//;
2658
2659         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2660                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2661 }
2662
2663 # convert config value to simple decimal number
2664 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2665 # to be multiplied by 1024, 1048576, or 1073741824
2666 sub config_to_int {
2667         my $val = shift;
2668
2669         # strip leading and trailing whitespace
2670         $val =~ s/^\s+//;
2671         $val =~ s/\s+$//;
2672
2673         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2674                 $unit = lc($unit);
2675                 # unknown unit is treated as 1
2676                 return $num * ($unit eq 'g' ? 1073741824 :
2677                                $unit eq 'm' ?    1048576 :
2678                                $unit eq 'k' ?       1024 : 1);
2679         }
2680         return $val;
2681 }
2682
2683 # convert config value to array reference, if needed
2684 sub config_to_multi {
2685         my $val = shift;
2686
2687         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2688 }
2689
2690 sub git_get_project_config {
2691         my ($key, $type) = @_;
2692
2693         return unless defined $git_dir;
2694
2695         # key sanity check
2696         return unless ($key);
2697         # only subsection, if exists, is case sensitive,
2698         # and not lowercased by 'git config -z -l'
2699         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2700                 $key = join(".", lc($hi), $mi, lc($lo));
2701         } else {
2702                 $key = lc($key);
2703         }
2704         $key =~ s/^gitweb\.//;
2705         return if ($key =~ m/\W/);
2706
2707         # type sanity check
2708         if (defined $type) {
2709                 $type =~ s/^--//;
2710                 $type = undef
2711                         unless ($type eq 'bool' || $type eq 'int');
2712         }
2713
2714         # get config
2715         if (!defined $config_file ||
2716             $config_file ne "$git_dir/config") {
2717                 %config = git_parse_project_config('gitweb');
2718                 $config_file = "$git_dir/config";
2719         }
2720
2721         # check if config variable (key) exists
2722         return unless exists $config{"gitweb.$key"};
2723
2724         # ensure given type
2725         if (!defined $type) {
2726                 return $config{"gitweb.$key"};
2727         } elsif ($type eq 'bool') {
2728                 # backward compatibility: 'git config --bool' returns true/false
2729                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2730         } elsif ($type eq 'int') {
2731                 return config_to_int($config{"gitweb.$key"});
2732         }
2733         return $config{"gitweb.$key"};
2734 }
2735
2736 # get hash of given path at given ref
2737 sub git_get_hash_by_path {
2738         my $base = shift;
2739         my $path = shift || return undef;
2740         my $type = shift;
2741
2742         $path =~ s,/+$,,;
2743
2744         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2745                 or die_error(500, "Open git-ls-tree failed");
2746         my $line = <$fd>;
2747         close $fd or return undef;
2748
2749         if (!defined $line) {
2750                 # there is no tree or hash given by $path at $base
2751                 return undef;
2752         }
2753
2754         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2755         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2756         if (defined $type && $type ne $2) {
2757                 # type doesn't match
2758                 return undef;
2759         }
2760         return $3;
2761 }
2762
2763 # get path of entry with given hash at given tree-ish (ref)
2764 # used to get 'from' filename for combined diff (merge commit) for renames
2765 sub git_get_path_by_hash {
2766         my $base = shift || return;
2767         my $hash = shift || return;
2768
2769         local $/ = "\0";
2770
2771         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2772                 or return undef;
2773         while (my $line = <$fd>) {
2774                 chomp $line;
2775
2776                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2777                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2778                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2779                         close $fd;
2780                         return $1;
2781                 }
2782         }
2783         close $fd;
2784         return undef;
2785 }
2786
2787 ## ......................................................................
2788 ## git utility functions, directly accessing git repository
2789
2790 # get the value of config variable either from file named as the variable
2791 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2792 # configuration variable in the repository config file.
2793 sub git_get_file_or_project_config {
2794         my ($path, $name) = @_;
2795
2796         $git_dir = "$projectroot/$path";
2797         open my $fd, '<', "$git_dir/$name"
2798                 or return git_get_project_config($name);
2799         my $conf = <$fd>;
2800         close $fd;
2801         if (defined $conf) {
2802                 chomp $conf;
2803         }
2804         return $conf;
2805 }
2806
2807 sub git_get_project_description {
2808         my $path = shift;
2809         return git_get_file_or_project_config($path, 'description');
2810 }
2811
2812 sub git_get_project_category {
2813         my $path = shift;
2814         return git_get_file_or_project_config($path, 'category');
2815 }
2816
2817
2818 # supported formats:
2819 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2820 #   - if its contents is a number, use it as tag weight,
2821 #   - otherwise add a tag with weight 1
2822 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2823 #   the same value multiple times increases tag weight
2824 # * `gitweb.ctag' multi-valued repo config variable
2825 sub git_get_project_ctags {
2826         my $project = shift;
2827         my $ctags = {};
2828
2829         $git_dir = "$projectroot/$project";
2830         if (opendir my $dh, "$git_dir/ctags") {
2831                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2832                 foreach my $tagfile (@files) {
2833                         open my $ct, '<', $tagfile
2834                                 or next;
2835                         my $val = <$ct>;
2836                         chomp $val if $val;
2837                         close $ct;
2838
2839                         (my $ctag = $tagfile) =~ s#.*/##;
2840                         if ($val =~ /^\d+$/) {
2841                                 $ctags->{$ctag} = $val;
2842                         } else {
2843                                 $ctags->{$ctag} = 1;
2844                         }
2845                 }
2846                 closedir $dh;
2847
2848         } elsif (open my $fh, '<', "$git_dir/ctags") {
2849                 while (my $line = <$fh>) {
2850                         chomp $line;
2851                         $ctags->{$line}++ if $line;
2852                 }
2853                 close $fh;
2854
2855         } else {
2856                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2857                 foreach my $tag (@$taglist) {
2858                         $ctags->{$tag}++;
2859                 }
2860         }
2861
2862         return $ctags;
2863 }
2864
2865 # return hash, where keys are content tags ('ctags'),
2866 # and values are sum of weights of given tag in every project
2867 sub git_gather_all_ctags {
2868         my $projects = shift;
2869         my $ctags = {};
2870
2871         foreach my $p (@$projects) {
2872                 foreach my $ct (keys %{$p->{'ctags'}}) {
2873                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2874                 }
2875         }
2876
2877         return $ctags;
2878 }
2879
2880 sub git_populate_project_tagcloud {
2881         my $ctags = shift;
2882
2883         # First, merge different-cased tags; tags vote on casing
2884         my %ctags_lc;
2885         foreach (keys %$ctags) {
2886                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2887                 if (not $ctags_lc{lc $_}->{topcount}
2888                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2889                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2890                         $ctags_lc{lc $_}->{topname} = $_;
2891                 }
2892         }
2893
2894         my $cloud;
2895         my $matched = $input_params{'ctag'};
2896         if (eval { require HTML::TagCloud; 1; }) {
2897                 $cloud = HTML::TagCloud->new;
2898                 foreach my $ctag (sort keys %ctags_lc) {
2899                         # Pad the title with spaces so that the cloud looks
2900                         # less crammed.
2901                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2902                         $title =~ s/ /&nbsp;/g;
2903                         $title =~ s/^/&nbsp;/g;
2904                         $title =~ s/$/&nbsp;/g;
2905                         if (defined $matched && $matched eq $ctag) {
2906                                 $title = qq(<span class="match">$title</span>);
2907                         }
2908                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2909                                     $ctags_lc{$ctag}->{count});
2910                 }
2911         } else {
2912                 $cloud = {};
2913                 foreach my $ctag (keys %ctags_lc) {
2914                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2915                         if (defined $matched && $matched eq $ctag) {
2916                                 $title = qq(<span class="match">$title</span>);
2917                         }
2918                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2919                         $cloud->{$ctag}{ctag} =
2920                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2921                 }
2922         }
2923         return $cloud;
2924 }
2925
2926 sub git_show_project_tagcloud {
2927         my ($cloud, $count) = @_;
2928         if (ref $cloud eq 'HTML::TagCloud') {
2929                 return $cloud->html_and_css($count);
2930         } else {
2931                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2932                 return
2933                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2934                         join (', ', map {
2935                                 $cloud->{$_}->{'ctag'}
2936                         } splice(@tags, 0, $count)) .
2937                         '</div>';
2938         }
2939 }
2940
2941 sub git_get_project_url_list {
2942         my $path = shift;
2943
2944         $git_dir = "$projectroot/$path";
2945         open my $fd, '<', "$git_dir/cloneurl"
2946                 or return wantarray ?
2947                 @{ config_to_multi(git_get_project_config('url')) } :
2948                    config_to_multi(git_get_project_config('url'));
2949         my @git_project_url_list = map { chomp; $_ } <$fd>;
2950         close $fd;
2951
2952         return wantarray ? @git_project_url_list : \@git_project_url_list;
2953 }
2954
2955 sub git_get_projects_list {
2956         my $filter = shift || '';
2957         my $paranoid = shift;
2958         my @list;
2959
2960         if (-d $projects_list) {
2961                 # search in directory
2962                 my $dir = $projects_list;
2963                 # remove the trailing "/"
2964                 $dir =~ s!/+$!!;
2965                 my $pfxlen = length("$dir");
2966                 my $pfxdepth = ($dir =~ tr!/!!);
2967                 # when filtering, search only given subdirectory
2968                 if ($filter && !$paranoid) {
2969                         $dir .= "/$filter";
2970                         $dir =~ s!/+$!!;
2971                 }
2972
2973                 File::Find::find({
2974                         follow_fast => 1, # follow symbolic links
2975                         follow_skip => 2, # ignore duplicates
2976                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2977                         wanted => sub {
2978                                 # global variables
2979                                 our $project_maxdepth;
2980                                 our $projectroot;
2981                                 # skip project-list toplevel, if we get it.
2982                                 return if (m!^[/.]$!);
2983                                 # only directories can be git repositories
2984                                 return unless (-d $_);
2985                                 # don't traverse too deep (Find is super slow on os x)
2986                                 # $project_maxdepth excludes depth of $projectroot
2987                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2988                                         $File::Find::prune = 1;
2989                                         return;
2990                                 }
2991
2992                                 my $path = substr($File::Find::name, $pfxlen + 1);
2993                                 # paranoidly only filter here
2994                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2995                                         next;
2996                                 }
2997                                 # we check related file in $projectroot
2998                                 if (check_export_ok("$projectroot/$path")) {
2999                                         push @list, { path => $path };
3000                                         $File::Find::prune = 1;
3001                                 }
3002                         },
3003                 }, "$dir");
3004
3005         } elsif (-f $projects_list) {
3006                 # read from file(url-encoded):
3007                 # 'git%2Fgit.git Linus+Torvalds'
3008                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3009                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3010                 open my $fd, '<', $projects_list or return;
3011         PROJECT:
3012                 while (my $line = <$fd>) {
3013                         chomp $line;
3014                         my ($path, $owner) = split ' ', $line;
3015                         $path = unescape($path);
3016                         $owner = unescape($owner);
3017                         if (!defined $path) {
3018                                 next;
3019                         }
3020                         # if $filter is rpovided, check if $path begins with $filter
3021                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3022                                 next;
3023                         }
3024                         if (check_export_ok("$projectroot/$path")) {
3025                                 my $pr = {
3026                                         path => $path
3027                                 };
3028                                 if ($owner) {
3029                                         $pr->{'owner'} = to_utf8($owner);
3030                                 }
3031                                 push @list, $pr;
3032                         }
3033                 }
3034                 close $fd;
3035         }
3036         return @list;
3037 }
3038
3039 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3040 # as side effects it sets 'forks' field to list of forks for forked projects
3041 sub filter_forks_from_projects_list {
3042         my $projects = shift;
3043
3044         my %trie; # prefix tree of directories (path components)
3045         # generate trie out of those directories that might contain forks
3046         foreach my $pr (@$projects) {
3047                 my $path = $pr->{'path'};
3048                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3049                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3050                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3051                 next unless (-d "$projectroot/$path"); # containing directory exists
3052                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3053
3054                 # add to trie
3055                 my @dirs = split('/', $path);
3056                 # walk the trie, until either runs out of components or out of trie
3057                 my $ref = \%trie;
3058                 while (scalar @dirs &&
3059                        exists($ref->{$dirs[0]})) {
3060                         $ref = $ref->{shift @dirs};
3061                 }
3062                 # create rest of trie structure from rest of components
3063                 foreach my $dir (@dirs) {
3064                         $ref = $ref->{$dir} = {};
3065                 }
3066                 # create end marker, store $pr as a data
3067                 $ref->{''} = $pr if (!exists $ref->{''});
3068         }
3069
3070         # filter out forks, by finding shortest prefix match for paths
3071         my @filtered;
3072  PROJECT:
3073         foreach my $pr (@$projects) {
3074                 # trie lookup
3075                 my $ref = \%trie;
3076         DIR:
3077                 foreach my $dir (split('/', $pr->{'path'})) {
3078                         if (exists $ref->{''}) {
3079                                 # found [shortest] prefix, is a fork - skip it
3080                                 push @{$ref->{''}{'forks'}}, $pr;
3081                                 next PROJECT;
3082                         }
3083                         if (!exists $ref->{$dir}) {
3084                                 # not in trie, cannot have prefix, not a fork
3085                                 push @filtered, $pr;
3086                                 next PROJECT;
3087                         }
3088                         # If the dir is there, we just walk one step down the trie.
3089                         $ref = $ref->{$dir};
3090                 }
3091                 # we ran out of trie
3092                 # (shouldn't happen: it's either no match, or end marker)
3093                 push @filtered, $pr;
3094         }
3095
3096         return @filtered;
3097 }
3098
3099 # note: fill_project_list_info must be run first,
3100 # for 'descr_long' and 'ctags' to be filled
3101 sub search_projects_list {
3102         my ($projlist, %opts) = @_;
3103         my $tagfilter  = $opts{'tagfilter'};
3104         my $search_re = $opts{'search_regexp'};
3105
3106         return @$projlist
3107                 unless ($tagfilter || $search_re);
3108
3109         # searching projects require filling to be run before it;
3110         fill_project_list_info($projlist,
3111                                $tagfilter  ? 'ctags' : (),
3112                                $search_re ? ('path', 'descr') : ());
3113         my @projects;
3114  PROJECT:
3115         foreach my $pr (@$projlist) {
3116
3117                 if ($tagfilter) {
3118                         next unless ref($pr->{'ctags'}) eq 'HASH';
3119                         next unless
3120                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3121                 }
3122
3123                 if ($search_re) {
3124                         next unless
3125                                 $pr->{'path'} =~ /$search_re/ ||
3126                                 $pr->{'descr_long'} =~ /$search_re/;
3127                 }
3128
3129                 push @projects, $pr;
3130         }
3131
3132         return @projects;
3133 }
3134
3135 our $gitweb_project_owner = undef;
3136 sub git_get_project_list_from_file {
3137
3138         return if (defined $gitweb_project_owner);
3139
3140         $gitweb_project_owner = {};
3141         # read from file (url-encoded):
3142         # 'git%2Fgit.git Linus+Torvalds'
3143         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3144         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3145         if (-f $projects_list) {
3146                 open(my $fd, '<', $projects_list);
3147                 while (my $line = <$fd>) {
3148                         chomp $line;
3149                         my ($pr, $ow) = split ' ', $line;
3150                         $pr = unescape($pr);
3151                         $ow = unescape($ow);
3152                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3153                 }
3154                 close $fd;
3155         }
3156 }
3157
3158 sub git_get_project_owner {
3159         my $project = shift;
3160         my $owner;
3161
3162         return undef unless $project;
3163         $git_dir = "$projectroot/$project";
3164
3165         if (!defined $gitweb_project_owner) {
3166                 git_get_project_list_from_file();
3167         }
3168
3169         if (exists $gitweb_project_owner->{$project}) {
3170                 $owner = $gitweb_project_owner->{$project};
3171         }
3172         if (!defined $owner){
3173                 $owner = git_get_project_config('owner');
3174         }
3175         if (!defined $owner) {
3176                 $owner = get_file_owner("$git_dir");
3177         }
3178
3179         return $owner;
3180 }
3181
3182 sub git_get_last_activity {
3183         my ($path) = @_;
3184         my $fd;
3185
3186         $git_dir = "$projectroot/$path";
3187         open($fd, "-|", git_cmd(), 'for-each-ref',
3188              '--format=%(committer)',
3189              '--sort=-committerdate',
3190              '--count=1',
3191              'refs/heads') or return;
3192         my $most_recent = <$fd>;
3193         close $fd or return;
3194         if (defined $most_recent &&
3195             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3196                 my $timestamp = $1;
3197                 my $age = time - $timestamp;
3198                 return ($age, age_string($age));
3199         }
3200         return (undef, undef);
3201 }
3202
3203 # Implementation note: when a single remote is wanted, we cannot use 'git
3204 # remote show -n' because that command always work (assuming it's a remote URL
3205 # if it's not defined), and we cannot use 'git remote show' because that would
3206 # try to make a network roundtrip. So the only way to find if that particular
3207 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3208 # and when we find what we want.
3209 sub git_get_remotes_list {
3210         my $wanted = shift;
3211         my %remotes = ();
3212
3213         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3214         return unless $fd;
3215         while (my $remote = <$fd>) {
3216                 chomp $remote;
3217                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3218                 next if $wanted and not $remote eq $wanted;
3219                 my ($url, $key) = ($1, $2);
3220
3221                 $remotes{$remote} ||= { 'heads' => () };
3222                 $remotes{$remote}{$key} = $url;
3223         }
3224         close $fd or return;
3225         return wantarray ? %remotes : \%remotes;
3226 }
3227
3228 # Takes a hash of remotes as first parameter and fills it by adding the
3229 # available remote heads for each of the indicated remotes.
3230 sub fill_remote_heads {
3231         my $remotes = shift;
3232         my @heads = map { "remotes/$_" } keys %$remotes;
3233         my @remoteheads = git_get_heads_list(undef, @heads);
3234         foreach my $remote (keys %$remotes) {
3235                 $remotes->{$remote}{'heads'} = [ grep {
3236                         $_->{'name'} =~ s!^$remote/!!
3237                         } @remoteheads ];
3238         }
3239 }
3240
3241 sub git_get_references {
3242         my $type = shift || "";
3243         my %refs;
3244         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3245         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3246         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3247                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3248                 or return;
3249
3250         while (my $line = <$fd>) {
3251                 chomp $line;
3252                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3253                         if (defined $refs{$1}) {
3254                                 push @{$refs{$1}}, $2;
3255                         } else {
3256                                 $refs{$1} = [ $2 ];
3257                         }
3258                 }
3259         }
3260         close $fd or return;
3261         return \%refs;
3262 }
3263
3264 sub git_get_rev_name_tags {
3265         my $hash = shift || return undef;
3266
3267         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3268                 or return;
3269         my $name_rev = <$fd>;
3270         close $fd;
3271
3272         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3273                 return $1;
3274         } else {
3275                 # catches also '$hash undefined' output
3276                 return undef;
3277         }
3278 }
3279
3280 ## ----------------------------------------------------------------------
3281 ## parse to hash functions
3282
3283 sub parse_date {
3284         my $epoch = shift;
3285         my $tz = shift || "-0000";
3286
3287         my %date;
3288         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3289         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3290         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3291         $date{'hour'} = $hour;
3292         $date{'minute'} = $min;
3293         $date{'mday'} = $mday;
3294         $date{'day'} = $days[$wday];
3295         $date{'month'} = $months[$mon];
3296         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3297                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3298         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3299                              $mday, $months[$mon], $hour ,$min;
3300         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3301                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3302
3303         my ($tz_sign, $tz_hour, $tz_min) =
3304                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3305         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3306         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3307         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3308         $date{'hour_local'} = $hour;
3309         $date{'minute_local'} = $min;
3310         $date{'tz_local'} = $tz;
3311         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3312                                   1900+$year, $mon+1, $mday,
3313                                   $hour, $min, $sec, $tz);
3314         return %date;
3315 }
3316
3317 sub parse_tag {
3318         my $tag_id = shift;
3319         my %tag;
3320         my @comment;
3321
3322         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3323         $tag{'id'} = $tag_id;
3324         while (my $line = <$fd>) {
3325                 chomp $line;
3326                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3327                         $tag{'object'} = $1;
3328                 } elsif ($line =~ m/^type (.+)$/) {
3329                         $tag{'type'} = $1;
3330                 } elsif ($line =~ m/^tag (.+)$/) {
3331                         $tag{'name'} = $1;
3332                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3333                         $tag{'author'} = $1;
3334                         $tag{'author_epoch'} = $2;
3335                         $tag{'author_tz'} = $3;
3336                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3337                                 $tag{'author_name'}  = $1;
3338                                 $tag{'author_email'} = $2;
3339                         } else {
3340                                 $tag{'author_name'} = $tag{'author'};
3341                         }
3342                 } elsif ($line =~ m/--BEGIN/) {
3343                         push @comment, $line;
3344                         last;
3345                 } elsif ($line eq "") {
3346                         last;
3347                 }
3348         }
3349         push @comment, <$fd>;
3350         $tag{'comment'} = \@comment;
3351         close $fd or return;
3352         if (!defined $tag{'name'}) {
3353                 return
3354         };
3355         return %tag
3356 }
3357
3358 sub parse_commit_text {
3359         my ($commit_text, $withparents) = @_;
3360         my @commit_lines = split '\n', $commit_text;
3361         my %co;
3362
3363         pop @commit_lines; # Remove '\0'
3364
3365         if (! @commit_lines) {
3366                 return;
3367         }
3368
3369         my $header = shift @commit_lines;
3370         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3371                 return;
3372         }
3373         ($co{'id'}, my @parents) = split ' ', $header;
3374         while (my $line = shift @commit_lines) {
3375                 last if $line eq "\n";
3376                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3377                         $co{'tree'} = $1;
3378                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3379                         push @parents, $1;
3380                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3381                         $co{'author'} = to_utf8($1);
3382                         $co{'author_epoch'} = $2;
3383                         $co{'author_tz'} = $3;
3384                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3385                                 $co{'author_name'}  = $1;
3386                                 $co{'author_email'} = $2;
3387                         } else {
3388                                 $co{'author_name'} = $co{'author'};
3389                         }
3390                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3391                         $co{'committer'} = to_utf8($1);
3392                         $co{'committer_epoch'} = $2;
3393                         $co{'committer_tz'} = $3;
3394                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3395                                 $co{'committer_name'}  = $1;
3396                                 $co{'committer_email'} = $2;
3397                         } else {
3398                                 $co{'committer_name'} = $co{'committer'};
3399                         }
3400                 }
3401         }
3402         if (!defined $co{'tree'}) {
3403                 return;
3404         };
3405         $co{'parents'} = \@parents;
3406         $co{'parent'} = $parents[0];
3407
3408         foreach my $title (@commit_lines) {
3409                 $title =~ s/^    //;
3410                 if ($title ne "") {
3411                         $co{'title'} = chop_str($title, 80, 5);
3412                         # remove leading stuff of merges to make the interesting part visible
3413                         if (length($title) > 50) {
3414                                 $title =~ s/^Automatic //;
3415                                 $title =~ s/^merge (of|with) /Merge ... /i;
3416                                 if (length($title) > 50) {
3417                                         $title =~ s/(http|rsync):\/\///;
3418                                 }
3419                                 if (length($title) > 50) {
3420                                         $title =~ s/(master|www|rsync)\.//;
3421                                 }
3422                                 if (length($title) > 50) {
3423                                         $title =~ s/kernel.org:?//;
3424                                 }
3425                                 if (length($title) > 50) {
3426                                         $title =~ s/\/pub\/scm//;
3427                                 }
3428                         }
3429                         $co{'title_short'} = chop_str($title, 50, 5);
3430                         last;
3431                 }
3432         }
3433         if (! defined $co{'title'} || $co{'title'} eq "") {
3434                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3435         }
3436         # remove added spaces
3437         foreach my $line (@commit_lines) {
3438                 $line =~ s/^    //;
3439         }
3440         $co{'comment'} = \@commit_lines;
3441
3442         my $age = time - $co{'committer_epoch'};
3443         $co{'age'} = $age;
3444         $co{'age_string'} = age_string($age);
3445         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3446         if ($age > 60*60*24*7*2) {
3447                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3448                 $co{'age_string_age'} = $co{'age_string'};
3449         } else {
3450                 $co{'age_string_date'} = $co{'age_string'};
3451                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3452         }
3453         return %co;
3454 }
3455
3456 sub parse_commit {
3457         my ($commit_id) = @_;
3458         my %co;
3459
3460         local $/ = "\0";
3461
3462         open my $fd, "-|", git_cmd(), "rev-list",
3463                 "--parents",
3464                 "--header",
3465                 "--max-count=1",
3466                 $commit_id,
3467                 "--",
3468                 or die_error(500, "Open git-rev-list failed");
3469         %co = parse_commit_text(<$fd>, 1);
3470         close $fd;
3471
3472         return %co;
3473 }
3474
3475 sub parse_commits {
3476         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3477         my @cos;
3478
3479         $maxcount ||= 1;
3480         $skip ||= 0;
3481
3482         local $/ = "\0";
3483
3484         open my $fd, "-|", git_cmd(), "rev-list",
3485                 "--header",
3486                 @args,
3487                 ("--max-count=" . $maxcount),
3488                 ("--skip=" . $skip),
3489                 @extra_options,
3490                 $commit_id,
3491                 "--",
3492                 ($filename ? ($filename) : ())
3493                 or die_error(500, "Open git-rev-list failed");
3494         while (my $line = <$fd>) {
3495                 my %co = parse_commit_text($line);
3496                 push @cos, \%co;
3497         }
3498         close $fd;
3499
3500         return wantarray ? @cos : \@cos;
3501 }
3502
3503 # parse line of git-diff-tree "raw" output
3504 sub parse_difftree_raw_line {
3505         my $line = shift;
3506         my %res;
3507
3508         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3509         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3510         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3511                 $res{'from_mode'} = $1;
3512                 $res{'to_mode'} = $2;
3513                 $res{'from_id'} = $3;
3514                 $res{'to_id'} = $4;
3515                 $res{'status'} = $5;
3516                 $res{'similarity'} = $6;
3517                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3518                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3519                 } else {
3520                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3521                 }
3522         }
3523         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3524         # combined diff (for merge commit)
3525         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3526                 $res{'nparents'}  = length($1);
3527                 $res{'from_mode'} = [ split(' ', $2) ];
3528                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3529                 $res{'from_id'} = [ split(' ', $3) ];
3530                 $res{'to_id'} = pop @{$res{'from_id'}};
3531                 $res{'status'} = [ split('', $4) ];
3532                 $res{'to_file'} = unquote($5);
3533         }
3534         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3535         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3536                 $res{'commit'} = $1;
3537         }
3538
3539         return wantarray ? %res : \%res;
3540 }
3541
3542 # wrapper: return parsed line of git-diff-tree "raw" output
3543 # (the argument might be raw line, or parsed info)
3544 sub parsed_difftree_line {
3545         my $line_or_ref = shift;
3546
3547         if (ref($line_or_ref) eq "HASH") {
3548                 # pre-parsed (or generated by hand)
3549                 return $line_or_ref;
3550         } else {
3551                 return parse_difftree_raw_line($line_or_ref);
3552         }
3553 }
3554
3555 # parse line of git-ls-tree output
3556 sub parse_ls_tree_line {
3557         my $line = shift;
3558         my %opts = @_;
3559         my %res;
3560
3561         if ($opts{'-l'}) {
3562                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3563                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3564
3565                 $res{'mode'} = $1;
3566                 $res{'type'} = $2;
3567                 $res{'hash'} = $3;
3568                 $res{'size'} = $4;
3569                 if ($opts{'-z'}) {
3570                         $res{'name'} = $5;
3571                 } else {
3572                         $res{'name'} = unquote($5);
3573                 }
3574         } else {
3575                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3576                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3577
3578                 $res{'mode'} = $1;
3579                 $res{'type'} = $2;
3580                 $res{'hash'} = $3;
3581                 if ($opts{'-z'}) {
3582                         $res{'name'} = $4;
3583                 } else {
3584                         $res{'name'} = unquote($4);
3585                 }
3586         }
3587
3588         return wantarray ? %res : \%res;
3589 }
3590
3591 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3592 sub parse_from_to_diffinfo {
3593         my ($diffinfo, $from, $to, @parents) = @_;
3594
3595         if ($diffinfo->{'nparents'}) {
3596                 # combined diff
3597                 $from->{'file'} = [];
3598                 $from->{'href'} = [];
3599                 fill_from_file_info($diffinfo, @parents)
3600                         unless exists $diffinfo->{'from_file'};
3601                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3602                         $from->{'file'}[$i] =
3603                                 defined $diffinfo->{'from_file'}[$i] ?
3604                                         $diffinfo->{'from_file'}[$i] :
3605                                         $diffinfo->{'to_file'};
3606                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3607                                 $from->{'href'}[$i] = href(action=>"blob",
3608                                                            hash_base=>$parents[$i],
3609                                                            hash=>$diffinfo->{'from_id'}[$i],
3610                                                            file_name=>$from->{'file'}[$i]);
3611                         } else {
3612                                 $from->{'href'}[$i] = undef;
3613                         }
3614                 }
3615         } else {
3616                 # ordinary (not combined) diff
3617                 $from->{'file'} = $diffinfo->{'from_file'};
3618                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3619                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3620                                                hash=>$diffinfo->{'from_id'},
3621                                                file_name=>$from->{'file'});
3622                 } else {
3623                         delete $from->{'href'};
3624                 }
3625         }
3626
3627         $to->{'file'} = $diffinfo->{'to_file'};
3628         if (!is_deleted($diffinfo)) { # file exists in result
3629                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3630                                      hash=>$diffinfo->{'to_id'},
3631                                      file_name=>$to->{'file'});
3632         } else {
3633                 delete $to->{'href'};
3634         }
3635 }
3636
3637 ## ......................................................................
3638 ## parse to array of hashes functions
3639
3640 sub git_get_heads_list {
3641         my ($limit, @classes) = @_;
3642         @classes = ('heads') unless @classes;
3643         my @patterns = map { "refs/$_" } @classes;
3644         my @headslist;
3645
3646         open my $fd, '-|', git_cmd(), 'for-each-ref',
3647                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3648                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3649                 @patterns
3650                 or return;
3651         while (my $line = <$fd>) {
3652                 my %ref_item;
3653
3654                 chomp $line;
3655                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3656                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3657                 my ($committer, $epoch, $tz) =
3658                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3659                 $ref_item{'fullname'}  = $name;
3660                 $name =~ s!^refs/(?:head|remote)s/!!;
3661
3662                 $ref_item{'name'}  = $name;
3663                 $ref_item{'id'}    = $hash;
3664                 $ref_item{'title'} = $title || '(no commit message)';
3665                 $ref_item{'epoch'} = $epoch;
3666                 if ($epoch) {
3667                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3668                 } else {
3669                         $ref_item{'age'} = "unknown";
3670                 }
3671
3672                 push @headslist, \%ref_item;
3673         }
3674         close $fd;
3675
3676         return wantarray ? @headslist : \@headslist;
3677 }
3678
3679 sub git_get_tags_list {
3680         my $limit = shift;
3681         my @tagslist;
3682
3683         open my $fd, '-|', git_cmd(), 'for-each-ref',
3684                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3685                 '--format=%(objectname) %(objecttype) %(refname) '.
3686                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3687                 'refs/tags'
3688                 or return;
3689         while (my $line = <$fd>) {
3690                 my %ref_item;
3691
3692                 chomp $line;
3693                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3694                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3695                 my ($creator, $epoch, $tz) =
3696                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3697                 $ref_item{'fullname'} = $name;
3698                 $name =~ s!^refs/tags/!!;
3699
3700                 $ref_item{'type'} = $type;
3701                 $ref_item{'id'} = $id;
3702                 $ref_item{'name'} = $name;
3703                 if ($type eq "tag") {
3704                         $ref_item{'subject'} = $title;
3705                         $ref_item{'reftype'} = $reftype;
3706                         $ref_item{'refid'}   = $refid;
3707                 } else {
3708                         $ref_item{'reftype'} = $type;
3709                         $ref_item{'refid'}   = $id;
3710                 }
3711
3712                 if ($type eq "tag" || $type eq "commit") {
3713                         $ref_item{'epoch'} = $epoch;
3714                         if ($epoch) {
3715                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3716                         } else {
3717                                 $ref_item{'age'} = "unknown";
3718                         }
3719                 }
3720
3721                 push @tagslist, \%ref_item;
3722         }
3723         close $fd;
3724
3725         return wantarray ? @tagslist : \@tagslist;
3726 }
3727
3728 ## ----------------------------------------------------------------------
3729 ## filesystem-related functions
3730
3731 sub get_file_owner {
3732         my $path = shift;
3733
3734         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3735         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3736         if (!defined $gcos) {
3737                 return undef;
3738         }
3739         my $owner = $gcos;
3740         $owner =~ s/[,;].*$//;
3741         return to_utf8($owner);
3742 }
3743
3744 # assume that file exists
3745 sub insert_file {
3746         my $filename = shift;
3747
3748         open my $fd, '<', $filename;
3749         print map { to_utf8($_) } <$fd>;
3750         close $fd;
3751 }
3752
3753 ## ......................................................................
3754 ## mimetype related functions
3755
3756 sub mimetype_guess_file {
3757         my $filename = shift;
3758         my $mimemap = shift;
3759         -r $mimemap or return undef;
3760
3761         my %mimemap;
3762         open(my $mh, '<', $mimemap) or return undef;
3763         while (<$mh>) {
3764                 next if m/^#/; # skip comments
3765                 my ($mimetype, @exts) = split(/\s+/);
3766                 foreach my $ext (@exts) {
3767                         $mimemap{$ext} = $mimetype;
3768                 }
3769         }
3770         close($mh);
3771
3772         $filename =~ /\.([^.]*)$/;
3773         return $mimemap{$1};
3774 }
3775
3776 sub mimetype_guess {
3777         my $filename = shift;
3778         my $mime;
3779         $filename =~ /\./ or return undef;
3780
3781         if ($mimetypes_file) {
3782                 my $file = $mimetypes_file;
3783                 if ($file !~ m!^/!) { # if it is relative path
3784                         # it is relative to project
3785                         $file = "$projectroot/$project/$file";
3786                 }
3787                 $mime = mimetype_guess_file($filename, $file);
3788         }
3789         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3790         return $mime;
3791 }
3792
3793 sub blob_mimetype {
3794         my $fd = shift;
3795         my $filename = shift;
3796
3797         if ($filename) {
3798                 my $mime = mimetype_guess($filename);
3799                 $mime and return $mime;
3800         }
3801
3802         # just in case
3803         return $default_blob_plain_mimetype unless $fd;
3804
3805         if (-T $fd) {
3806                 return 'text/plain';
3807         } elsif (! $filename) {
3808                 return 'application/octet-stream';
3809         } elsif ($filename =~ m/\.png$/i) {
3810                 return 'image/png';
3811         } elsif ($filename =~ m/\.gif$/i) {
3812                 return 'image/gif';
3813         } elsif ($filename =~ m/\.jpe?g$/i) {
3814                 return 'image/jpeg';
3815         } else {
3816                 return 'application/octet-stream';
3817         }
3818 }
3819
3820 sub blob_contenttype {
3821         my ($fd, $file_name, $type) = @_;
3822
3823         $type ||= blob_mimetype($fd, $file_name);
3824         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3825                 $type .= "; charset=$default_text_plain_charset";
3826         }
3827
3828         return $type;
3829 }
3830
3831 # guess file syntax for syntax highlighting; return undef if no highlighting
3832 # the name of syntax can (in the future) depend on syntax highlighter used
3833 sub guess_file_syntax {
3834         my ($highlight, $mimetype, $file_name) = @_;
3835         return undef unless ($highlight && defined $file_name);
3836         my $basename = basename($file_name, '.in');
3837         return $highlight_basename{$basename}
3838                 if exists $highlight_basename{$basename};
3839
3840         $basename =~ /\.([^.]*)$/;
3841         my $ext = $1 or return undef;
3842         return $highlight_ext{$ext}
3843                 if exists $highlight_ext{$ext};
3844
3845         return undef;
3846 }
3847
3848 # run highlighter and return FD of its output,
3849 # or return original FD if no highlighting
3850 sub run_highlighter {
3851         my ($fd, $highlight, $syntax) = @_;
3852         return $fd unless ($highlight && defined $syntax);
3853
3854         close $fd;
3855         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3856                   quote_command($highlight_bin).
3857                   " --replace-tabs=8 --fragment --syntax $syntax |"
3858                 or die_error(500, "Couldn't open file or run syntax highlighter");
3859         return $fd;
3860 }
3861
3862 ## ======================================================================
3863 ## functions printing HTML: header, footer, error page
3864
3865 sub get_page_title {
3866         my $title = to_utf8($site_name);
3867
3868         unless (defined $project) {
3869                 if (defined $project_filter) {
3870                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3871                 }
3872                 return $title;
3873         }
3874         $title .= " - " . to_utf8($project);
3875
3876         return $title unless (defined $action);
3877         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3878
3879         return $title unless (defined $file_name);
3880         $title .= " - " . esc_path($file_name);
3881         if ($action eq "tree" && $file_name !~ m|/$|) {
3882                 $title .= "/";
3883         }
3884
3885         return $title;
3886 }
3887
3888 sub get_content_type_html {
3889         # require explicit support from the UA if we are to send the page as
3890         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3891         # we have to do this because MSIE sometimes globs '*/*', pretending to
3892         # support xhtml+xml but choking when it gets what it asked for.
3893         if (defined $cgi->http('HTTP_ACCEPT') &&
3894             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3895             $cgi->Accept('application/xhtml+xml') != 0) {
3896                 return 'application/xhtml+xml';
3897         } else {
3898                 return 'text/html';
3899         }
3900 }
3901
3902 sub print_feed_meta {
3903         if (defined $project) {
3904                 my %href_params = get_feed_info();
3905                 if (!exists $href_params{'-title'}) {
3906                         $href_params{'-title'} = 'log';
3907                 }
3908
3909                 foreach my $format (qw(RSS Atom)) {
3910                         my $type = lc($format);
3911                         my %link_attr = (
3912                                 '-rel' => 'alternate',
3913                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3914                                 '-type' => "application/$type+xml"
3915                         );
3916
3917                         $href_params{'extra_options'} = undef;
3918                         $href_params{'action'} = $type;
3919                         $link_attr{'-href'} = href(%href_params);
3920                         print "<link ".
3921                               "rel=\"$link_attr{'-rel'}\" ".
3922                               "title=\"$link_attr{'-title'}\" ".
3923                               "href=\"$link_attr{'-href'}\" ".
3924                               "type=\"$link_attr{'-type'}\" ".
3925                               "/>\n";
3926
3927                         $href_params{'extra_options'} = '--no-merges';
3928                         $link_attr{'-href'} = href(%href_params);
3929                         $link_attr{'-title'} .= ' (no merges)';
3930                         print "<link ".
3931                               "rel=\"$link_attr{'-rel'}\" ".
3932                               "title=\"$link_attr{'-title'}\" ".
3933                               "href=\"$link_attr{'-href'}\" ".
3934                               "type=\"$link_attr{'-type'}\" ".
3935                               "/>\n";
3936                 }
3937
3938         } else {
3939                 printf('<link rel="alternate" title="%s projects list" '.
3940                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3941                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3942                 printf('<link rel="alternate" title="%s projects feeds" '.
3943                        'href="%s" type="text/x-opml" />'."\n",
3944                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3945         }
3946 }
3947
3948 sub print_header_links {
3949         my $status = shift;
3950
3951         # print out each stylesheet that exist, providing backwards capability
3952         # for those people who defined $stylesheet in a config file
3953         if (defined $stylesheet) {
3954                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3955         } else {
3956                 foreach my $stylesheet (@stylesheets) {
3957                         next unless $stylesheet;
3958                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3959                 }
3960         }
3961         print_feed_meta()
3962                 if ($status eq '200 OK');
3963         if (defined $favicon) {
3964                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3965         }
3966 }
3967
3968 sub print_nav_breadcrumbs_path {
3969         my $dirprefix = undef;
3970         while (my $part = shift) {
3971                 $dirprefix .= "/" if defined $dirprefix;
3972                 $dirprefix .= $part;
3973                 print $cgi->a({-href => href(project => undef,
3974                                              project_filter => $dirprefix,
3975                                              action => "project_list")},
3976                               esc_html($part)) . " / ";
3977         }
3978 }
3979
3980 sub print_nav_breadcrumbs {
3981         my %opts = @_;
3982
3983         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3984         if (defined $project) {
3985                 my @dirname = split '/', $project;
3986                 my $projectbasename = pop @dirname;
3987                 print_nav_breadcrumbs_path(@dirname);
3988                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3989                 if (defined $action) {
3990                         my $action_print = $action ;
3991                         if (defined $opts{-action_extra}) {
3992                                 $action_print = $cgi->a({-href => href(action=>$action)},
3993                                         $action);
3994                         }
3995                         print " / $action_print";
3996                 }
3997                 if (defined $opts{-action_extra}) {
3998                         print " / $opts{-action_extra}";
3999                 }
4000                 print "\n";
4001         } elsif (defined $project_filter) {
4002                 print_nav_breadcrumbs_path(split '/', $project_filter);
4003         }
4004 }
4005
4006 sub print_search_form {
4007         if (!defined $searchtext) {
4008                 $searchtext = "";
4009         }
4010         my $search_hash;
4011         if (defined $hash_base) {
4012                 $search_hash = $hash_base;
4013         } elsif (defined $hash) {
4014                 $search_hash = $hash;
4015         } else {
4016                 $search_hash = "HEAD";
4017         }
4018         my $action = $my_uri;
4019         my $use_pathinfo = gitweb_check_feature('pathinfo');
4020         if ($use_pathinfo) {
4021                 $action .= "/".esc_url($project);
4022         }
4023         print $cgi->startform(-method => "get", -action => $action) .
4024               "<div class=\"search\">\n" .
4025               (!$use_pathinfo &&
4026               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4027               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4028               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4029               $cgi->popup_menu(-name => 'st', -default => 'commit',
4030                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4031               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4032               " search:\n",
4033               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4034               "<span title=\"Extended regular expression\">" .
4035               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4036                              -checked => $search_use_regexp) .
4037               "</span>" .
4038               "</div>" .
4039               $cgi->end_form() . "\n";
4040 }
4041
4042 sub git_header_html {
4043         my $status = shift || "200 OK";
4044         my $expires = shift;
4045         my %opts = @_;
4046
4047         my $title = get_page_title();
4048         my $content_type = get_content_type_html();
4049         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4050                            -status=> $status, -expires => $expires)
4051                 unless ($opts{'-no_http_header'});
4052         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4053         print <<EOF;
4054 <?xml version="1.0" encoding="utf-8"?>
4055 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4056 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4057 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4058 <!-- git core binaries version $git_version -->
4059 <head>
4060 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4061 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4062 <meta name="robots" content="index, nofollow"/>
4063 <title>$title</title>
4064 EOF
4065         # the stylesheet, favicon etc urls won't work correctly with path_info
4066         # unless we set the appropriate base URL
4067         if ($ENV{'PATH_INFO'}) {
4068                 print "<base href=\"".esc_url($base_url)."\" />\n";
4069         }
4070         print_header_links($status);
4071
4072         if (defined $site_html_head_string) {
4073                 print to_utf8($site_html_head_string);
4074         }
4075
4076         print "</head>\n" .
4077               "<body>\n";
4078
4079         if (defined $site_header && -f $site_header) {
4080                 insert_file($site_header);
4081         }
4082
4083         print "<div class=\"page_header\">\n";
4084         if (defined $logo) {
4085                 print $cgi->a({-href => esc_url($logo_url),
4086                                -title => $logo_label},
4087                               $cgi->img({-src => esc_url($logo),
4088                                          -width => 72, -height => 27,
4089                                          -alt => "git",
4090                                          -class => "logo"}));
4091         }
4092         print_nav_breadcrumbs(%opts);
4093         print "</div>\n";
4094
4095         my $have_search = gitweb_check_feature('search');
4096         if (defined $project && $have_search) {
4097                 print_search_form();
4098         }
4099 }
4100
4101 sub git_footer_html {
4102         my $feed_class = 'rss_logo';
4103
4104         print "<div class=\"page_footer\">\n";
4105         if (defined $project) {
4106                 my $descr = git_get_project_description($project);
4107                 if (defined $descr) {
4108                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4109                 }
4110
4111                 my %href_params = get_feed_info();
4112                 if (!%href_params) {
4113                         $feed_class .= ' generic';
4114                 }
4115                 $href_params{'-title'} ||= 'log';
4116
4117                 foreach my $format (qw(RSS Atom)) {
4118                         $href_params{'action'} = lc($format);
4119                         print $cgi->a({-href => href(%href_params),
4120                                       -title => "$href_params{'-title'} $format feed",
4121                                       -class => $feed_class}, $format)."\n";
4122                 }
4123
4124         } else {
4125                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4126                                              project_filter => $project_filter),
4127                               -class => $feed_class}, "OPML") . " ";
4128                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4129                                              project_filter => $project_filter),
4130                               -class => $feed_class}, "TXT") . "\n";
4131         }
4132         print "</div>\n"; # class="page_footer"
4133
4134         if (defined $t0 && gitweb_check_feature('timed')) {
4135                 print "<div id=\"generating_info\">\n";
4136                 print 'This page took '.
4137                       '<span id="generating_time" class="time_span">'.
4138                       tv_interval($t0, [ gettimeofday() ]).
4139                       ' seconds </span>'.
4140                       ' and '.
4141                       '<span id="generating_cmd">'.
4142                       $number_of_git_cmds.
4143                       '</span> git commands '.
4144                       " to generate.\n";
4145                 print "</div>\n"; # class="page_footer"
4146         }
4147
4148         if (defined $site_footer && -f $site_footer) {
4149                 insert_file($site_footer);
4150         }
4151
4152         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4153         if (defined $action &&
4154             $action eq 'blame_incremental') {
4155                 print qq!<script type="text/javascript">\n!.
4156                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4157                       qq!           "!. href() .qq!");\n!.
4158                       qq!</script>\n!;
4159         } else {
4160                 my ($jstimezone, $tz_cookie, $datetime_class) =
4161                         gitweb_get_feature('javascript-timezone');
4162
4163                 print qq!<script type="text/javascript">\n!.
4164                       qq!window.onload = function () {\n!;
4165                 if (gitweb_check_feature('javascript-actions')) {
4166                         print qq!       fixLinks();\n!;
4167                 }
4168                 if ($jstimezone && $tz_cookie && $datetime_class) {
4169                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4170                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4171                 }
4172                 print qq!};\n!.
4173                       qq!</script>\n!;
4174         }
4175
4176         print "</body>\n" .
4177               "</html>";
4178 }
4179
4180 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4181 # Example: die_error(404, 'Hash not found')
4182 # By convention, use the following status codes (as defined in RFC 2616):
4183 # 400: Invalid or missing CGI parameters, or
4184 #      requested object exists but has wrong type.
4185 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4186 #      this server or project.
4187 # 404: Requested object/revision/project doesn't exist.
4188 # 500: The server isn't configured properly, or
4189 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4190 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4191 # 503: The server is currently unavailable (because it is overloaded,
4192 #      or down for maintenance).  Generally, this is a temporary state.
4193 sub die_error {
4194         my $status = shift || 500;
4195         my $error = esc_html(shift) || "Internal Server Error";
4196         my $extra = shift;
4197         my %opts = @_;
4198
4199         my %http_responses = (
4200                 400 => '400 Bad Request',
4201                 403 => '403 Forbidden',
4202                 404 => '404 Not Found',
4203                 500 => '500 Internal Server Error',
4204                 503 => '503 Service Unavailable',
4205         );
4206         git_header_html($http_responses{$status}, undef, %opts);
4207         print <<EOF;
4208 <div class="page_body">
4209 <br /><br />
4210 $status - $error
4211 <br />
4212 EOF
4213         if (defined $extra) {
4214                 print "<hr />\n" .
4215                       "$extra\n";
4216         }
4217         print "</div>\n";
4218
4219         git_footer_html();
4220         goto DONE_GITWEB
4221                 unless ($opts{'-error_handler'});
4222 }
4223
4224 ## ----------------------------------------------------------------------
4225 ## functions printing or outputting HTML: navigation
4226
4227 sub git_print_page_nav {
4228         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4229         $extra = '' if !defined $extra; # pager or formats
4230
4231         my @navs = qw(summary shortlog log commit commitdiff tree);
4232         if ($suppress) {
4233                 @navs = grep { $_ ne $suppress } @navs;
4234         }
4235
4236         my %arg = map { $_ => {action=>$_} } @navs;
4237         if (defined $head) {
4238                 for (qw(commit commitdiff)) {
4239                         $arg{$_}{'hash'} = $head;
4240                 }
4241                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4242                         for (qw(shortlog log)) {
4243                                 $arg{$_}{'hash'} = $head;
4244                         }
4245                 }
4246         }
4247
4248         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4249         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4250
4251         my @actions = gitweb_get_feature('actions');
4252         my %repl = (
4253                 '%' => '%',
4254                 'n' => $project,         # project name
4255                 'f' => $git_dir,         # project path within filesystem
4256                 'h' => $treehead || '',  # current hash ('h' parameter)
4257                 'b' => $treebase || '',  # hash base ('hb' parameter)
4258         );
4259         while (@actions) {
4260                 my ($label, $link, $pos) = splice(@actions,0,3);
4261                 # insert
4262                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4263                 # munch munch
4264                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4265                 $arg{$label}{'_href'} = $link;
4266         }
4267
4268         print "<div class=\"page_nav\">\n" .
4269                 (join " | ",
4270                  map { $_ eq $current ?
4271                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4272                  } @navs);
4273         print "<br/>\n$extra<br/>\n" .
4274               "</div>\n";
4275 }
4276
4277 # returns a submenu for the nagivation of the refs views (tags, heads,
4278 # remotes) with the current view disabled and the remotes view only
4279 # available if the feature is enabled
4280 sub format_ref_views {
4281         my ($current) = @_;
4282         my @ref_views = qw{tags heads};
4283         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4284         return join " | ", map {
4285                 $_ eq $current ? $_ :
4286                 $cgi->a({-href => href(action=>$_)}, $_)
4287         } @ref_views
4288 }
4289
4290 sub format_paging_nav {
4291         my ($action, $page, $has_next_link) = @_;
4292         my $paging_nav;
4293
4294
4295         if ($page > 0) {
4296                 $paging_nav .=
4297                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4298                         " &sdot; " .
4299                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4300                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4301         } else {
4302                 $paging_nav .= "first &sdot; prev";
4303         }
4304
4305         if ($has_next_link) {
4306                 $paging_nav .= " &sdot; " .
4307                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4308                                  -accesskey => "n", -title => "Alt-n"}, "next");
4309         } else {
4310                 $paging_nav .= " &sdot; next";
4311         }
4312
4313         return $paging_nav;
4314 }
4315
4316 ## ......................................................................
4317 ## functions printing or outputting HTML: div
4318
4319 sub git_print_header_div {
4320         my ($action, $title, $hash, $hash_base) = @_;
4321         my %args = ();
4322
4323         $args{'action'} = $action;
4324         $args{'hash'} = $hash if $hash;
4325         $args{'hash_base'} = $hash_base if $hash_base;
4326
4327         print "<div class=\"header\">\n" .
4328               $cgi->a({-href => href(%args), -class => "title"},
4329               $title ? $title : $action) .
4330               "\n</div>\n";
4331 }
4332
4333 sub format_repo_url {
4334         my ($name, $url) = @_;
4335         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4336 }
4337
4338 # Group output by placing it in a DIV element and adding a header.
4339 # Options for start_div() can be provided by passing a hash reference as the
4340 # first parameter to the function.
4341 # Options to git_print_header_div() can be provided by passing an array
4342 # reference. This must follow the options to start_div if they are present.
4343 # The content can be a scalar, which is output as-is, a scalar reference, which
4344 # is output after html escaping, an IO handle passed either as *handle or
4345 # *handle{IO}, or a function reference. In the latter case all following
4346 # parameters will be taken as argument to the content function call.
4347 sub git_print_section {
4348         my ($div_args, $header_args, $content);
4349         my $arg = shift;
4350         if (ref($arg) eq 'HASH') {
4351                 $div_args = $arg;
4352                 $arg = shift;
4353         }
4354         if (ref($arg) eq 'ARRAY') {
4355                 $header_args = $arg;
4356                 $arg = shift;
4357         }
4358         $content = $arg;
4359
4360         print $cgi->start_div($div_args);
4361         git_print_header_div(@$header_args);
4362
4363         if (ref($content) eq 'CODE') {
4364                 $content->(@_);
4365         } elsif (ref($content) eq 'SCALAR') {
4366                 print esc_html($$content);
4367         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4368                 print <$content>;
4369         } elsif (!ref($content) && defined($content)) {
4370                 print $content;
4371         }
4372
4373         print $cgi->end_div;
4374 }
4375
4376 sub format_timestamp_html {
4377         my $date = shift;
4378         my $strtime = $date->{'rfc2822'};
4379
4380         my (undef, undef, $datetime_class) =
4381                 gitweb_get_feature('javascript-timezone');
4382         if ($datetime_class) {
4383                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4384         }
4385
4386         my $localtime_format = '(%02d:%02d %s)';
4387         if ($date->{'hour_local'} < 6) {
4388                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4389         }
4390         $strtime .= ' ' .
4391                     sprintf($localtime_format,
4392                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4393
4394         return $strtime;
4395 }
4396
4397 # Outputs the author name and date in long form
4398 sub git_print_authorship {
4399         my $co = shift;
4400         my %opts = @_;
4401         my $tag = $opts{-tag} || 'div';
4402         my $author = $co->{'author_name'};
4403
4404         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4405         print "<$tag class=\"author_date\">" .
4406               format_search_author($author, "author", esc_html($author)) .
4407               " [".format_timestamp_html(\%ad)."]".
4408               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4409               "</$tag>\n";
4410 }
4411
4412 # Outputs table rows containing the full author or committer information,
4413 # in the format expected for 'commit' view (& similar).
4414 # Parameters are a commit hash reference, followed by the list of people
4415 # to output information for. If the list is empty it defaults to both
4416 # author and committer.
4417 sub git_print_authorship_rows {
4418         my $co = shift;
4419         # too bad we can't use @people = @_ || ('author', 'committer')
4420         my @people = @_;
4421         @people = ('author', 'committer') unless @people;
4422         foreach my $who (@people) {
4423                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4424                 print "<tr><td>$who</td><td>" .
4425                       format_search_author($co->{"${who}_name"}, $who,
4426                                            esc_html($co->{"${who}_name"})) . " " .
4427                       format_search_author($co->{"${who}_email"}, $who,
4428                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4429                       "</td><td rowspan=\"2\">" .
4430                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4431                       "</td></tr>\n" .
4432                       "<tr>" .
4433                       "<td></td><td>" .
4434                       format_timestamp_html(\%wd) .
4435                       "</td>" .
4436                       "</tr>\n";
4437         }
4438 }
4439
4440 sub git_print_page_path {
4441         my $name = shift;
4442         my $type = shift;
4443         my $hb = shift;
4444
4445
4446         print "<div class=\"page_path\">";
4447         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4448                       -title => 'tree root'}, to_utf8("[$project]"));
4449         print " / ";
4450         if (defined $name) {
4451                 my @dirname = split '/', $name;
4452                 my $basename = pop @dirname;
4453                 my $fullname = '';
4454
4455                 foreach my $dir (@dirname) {
4456                         $fullname .= ($fullname ? '/' : '') . $dir;
4457                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4458                                                      hash_base=>$hb),
4459                                       -title => $fullname}, esc_path($dir));
4460                         print " / ";
4461                 }
4462                 if (defined $type && $type eq 'blob') {
4463                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4464                                                      hash_base=>$hb),
4465                                       -title => $name}, esc_path($basename));
4466                         if (gitweb_check_feature('highlight')) {
4467                                 print '&nbsp;&nbsp;&nbsp;&nbsp;
4468 <a id="lineNoToggle" href="#" onclick="toggleLineNumbers();"></a>
4469 <script>
4470 function toggleLineNumbers() {
4471         e = document.getElementById("lineNoStyle");
4472         e2 = document.getElementById("lineNoToggle");
4473         if (e2.innerHTML == "[Hide line numbers]") {
4474                 e.innerHTML = ".linenr { display:none; }";
4475                 e2.innerHTML = "[Show line numbers]";
4476         }
4477         else {
4478                 e.innerHTML = "";
4479                 e2.innerHTML = "[Hide line numbers]";
4480         }
4481 }
4482 var style = document.createElement("style");
4483 style.setAttribute("id", "lineNoStyle");
4484 document.getElementsByTagName("head")[0].appendChild(style);
4485 toggleLineNumbers();
4486 </script>
4487 ';
4488                         }
4489                 } elsif (defined $type && $type eq 'tree') {
4490                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4491                                                      hash_base=>$hb),
4492                                       -title => $name}, esc_path($basename));
4493                         print " / ";
4494                 } else {
4495                         print esc_path($basename);
4496                 }
4497         }
4498         print "<br/></div>\n";
4499 }
4500
4501 sub git_print_log {
4502         my $log = shift;
4503         my %opts = @_;
4504
4505         if ($opts{'-remove_title'}) {
4506                 # remove title, i.e. first line of log
4507                 shift @$log;
4508         }
4509         # remove leading empty lines
4510         while (defined $log->[0] && $log->[0] eq "") {
4511                 shift @$log;
4512         }
4513
4514         # print log
4515         my $skip_blank_line = 0;
4516         foreach my $line (@$log) {
4517                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4518                         if (! $opts{'-remove_signoff'}) {
4519                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4520                                 $skip_blank_line = 1;
4521                         }
4522                         next;
4523                 }
4524
4525                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4526                         if (! $opts{'-remove_signoff'}) {
4527                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4528                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4529                                         "</span><br/>\n";
4530                                 $skip_blank_line = 1;
4531                         }
4532                         next;
4533                 }
4534
4535                 # print only one empty line
4536                 # do not print empty line after signoff
4537                 if ($line eq "") {
4538                         next if ($skip_blank_line);
4539                         $skip_blank_line = 1;
4540                 } else {
4541                         $skip_blank_line = 0;
4542                 }
4543
4544                 print format_log_line_html($line) . "<br/>\n";
4545         }
4546
4547         if ($opts{'-final_empty_line'}) {
4548                 # end with single empty line
4549                 print "<br/>\n" unless $skip_blank_line;
4550         }
4551 }
4552
4553 # return link target (what link points to)
4554 sub git_get_link_target {
4555         my $hash = shift;
4556         my $link_target;
4557
4558         # read link
4559         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4560                 or return;
4561         {
4562                 local $/ = undef;
4563                 $link_target = <$fd>;
4564         }
4565         close $fd
4566                 or return;
4567
4568         return $link_target;
4569 }
4570
4571 # given link target, and the directory (basedir) the link is in,
4572 # return target of link relative to top directory (top tree);
4573 # return undef if it is not possible (including absolute links).
4574 sub normalize_link_target {
4575         my ($link_target, $basedir) = @_;
4576
4577         # absolute symlinks (beginning with '/') cannot be normalized
4578         return if (substr($link_target, 0, 1) eq '/');
4579
4580         # normalize link target to path from top (root) tree (dir)
4581         my $path;
4582         if ($basedir) {
4583                 $path = $basedir . '/' . $link_target;
4584         } else {
4585                 # we are in top (root) tree (dir)
4586                 $path = $link_target;
4587         }
4588
4589         # remove //, /./, and /../
4590         my @path_parts;
4591         foreach my $part (split('/', $path)) {
4592                 # discard '.' and ''
4593                 next if (!$part || $part eq '.');
4594                 # handle '..'
4595                 if ($part eq '..') {
4596                         if (@path_parts) {
4597                                 pop @path_parts;
4598                         } else {
4599                                 # link leads outside repository (outside top dir)
4600                                 return;
4601                         }
4602                 } else {
4603                         push @path_parts, $part;
4604                 }
4605         }
4606         $path = join('/', @path_parts);
4607
4608         return $path;
4609 }
4610
4611 # print tree entry (row of git_tree), but without encompassing <tr> element
4612 sub git_print_tree_entry {
4613         my ($t, $basedir, $hash_base, $have_blame) = @_;
4614
4615         my %base_key = ();
4616         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4617
4618         # The format of a table row is: mode list link.  Where mode is
4619         # the mode of the entry, list is the name of the entry, an href,
4620         # and link is the action links of the entry.
4621
4622         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4623         if (exists $t->{'size'}) {
4624                 print "<td class=\"size\">$t->{'size'}</td>\n";
4625         }
4626         if ($t->{'type'} eq "blob") {
4627                 print "<td class=\"list\">" .
4628                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4629                                                file_name=>"$basedir$t->{'name'}", %base_key),
4630                                 -class => "list"}, esc_path($t->{'name'}));
4631                 if (S_ISLNK(oct $t->{'mode'})) {
4632                         my $link_target = git_get_link_target($t->{'hash'});
4633                         if ($link_target) {
4634                                 my $norm_target = normalize_link_target($link_target, $basedir);
4635                                 if (defined $norm_target) {
4636                                         print " -> " .
4637                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4638                                                                      file_name=>$norm_target),
4639                                                        -title => $norm_target}, esc_path($link_target));
4640                                 } else {
4641                                         print " -> " . esc_path($link_target);
4642                                 }
4643                         }
4644                 }
4645                 print "</td>\n";
4646                 print "<td class=\"link\">";
4647                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4648                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4649                               "blob");
4650                 if ($have_blame) {
4651                         print " | " .
4652                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4653                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4654                                       "blame");
4655                 }
4656                 if (defined $hash_base) {
4657                         print " | " .
4658                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4659                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4660                                       "history");
4661                 }
4662                 print " | " .
4663                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4664                                                file_name=>"$basedir$t->{'name'}")},
4665                                 "raw");
4666                 print "</td>\n";
4667
4668         } elsif ($t->{'type'} eq "tree") {
4669                 print "<td class=\"list\">";
4670                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4671                                              file_name=>"$basedir$t->{'name'}",
4672                                              %base_key)},
4673                               esc_path($t->{'name'}));
4674                 print "</td>\n";
4675                 print "<td class=\"link\">";
4676                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4677                                              file_name=>"$basedir$t->{'name'}",
4678                                              %base_key)},
4679                               "tree");
4680                 if (defined $hash_base) {
4681                         print " | " .
4682                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4683                                                      file_name=>"$basedir$t->{'name'}")},
4684                                       "history");
4685                 }
4686                 print "</td>\n";
4687         } else {
4688                 # unknown object: we can only present history for it
4689                 # (this includes 'commit' object, i.e. submodule support)
4690                 print "<td class=\"list\">" .
4691                       esc_path($t->{'name'}) .
4692                       "</td>\n";
4693                 print "<td class=\"link\">";
4694                 if (defined $hash_base) {
4695                         print $cgi->a({-href => href(action=>"history",
4696                                                      hash_base=>$hash_base,
4697                                                      file_name=>"$basedir$t->{'name'}")},
4698                                       "history");
4699                 }
4700                 print "</td>\n";
4701         }
4702 }
4703
4704 ## ......................................................................
4705 ## functions printing large fragments of HTML
4706
4707 # get pre-image filenames for merge (combined) diff
4708 sub fill_from_file_info {
4709         my ($diff, @parents) = @_;
4710
4711         $diff->{'from_file'} = [ ];
4712         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4713         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4714                 if ($diff->{'status'}[$i] eq 'R' ||
4715                     $diff->{'status'}[$i] eq 'C') {
4716                         $diff->{'from_file'}[$i] =
4717                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4718                 }
4719         }
4720
4721         return $diff;
4722 }
4723
4724 # is current raw difftree line of file deletion
4725 sub is_deleted {
4726         my $diffinfo = shift;
4727
4728         return $diffinfo->{'to_id'} eq ('0' x 40);
4729 }
4730
4731 # does patch correspond to [previous] difftree raw line
4732 # $diffinfo  - hashref of parsed raw diff format
4733 # $patchinfo - hashref of parsed patch diff format
4734 #              (the same keys as in $diffinfo)
4735 sub is_patch_split {
4736         my ($diffinfo, $patchinfo) = @_;
4737
4738         return defined $diffinfo && defined $patchinfo
4739                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4740 }
4741
4742
4743 sub git_difftree_body {
4744         my ($difftree, $hash, @parents) = @_;
4745         my ($parent) = $parents[0];
4746         my $have_blame = gitweb_check_feature('blame');
4747         print "<div class=\"list_head\">\n";
4748         if ($#{$difftree} > 10) {
4749                 print(($#{$difftree} + 1) . " files changed:\n");
4750         }
4751         print "</div>\n";
4752
4753         print "<table class=\"" .
4754               (@parents > 1 ? "combined " : "") .
4755               "diff_tree\">\n";
4756
4757         # header only for combined diff in 'commitdiff' view
4758         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4759         if ($has_header) {
4760                 # table header
4761                 print "<thead><tr>\n" .
4762                        "<th></th><th></th>\n"; # filename, patchN link
4763                 for (my $i = 0; $i < @parents; $i++) {
4764                         my $par = $parents[$i];
4765                         print "<th>" .
4766                               $cgi->a({-href => href(action=>"commitdiff",
4767                                                      hash=>$hash, hash_parent=>$par),
4768                                        -title => 'commitdiff to parent number ' .
4769                                                   ($i+1) . ': ' . substr($par,0,7)},
4770                                       $i+1) .
4771                               "&nbsp;</th>\n";
4772                 }
4773                 print "</tr></thead>\n<tbody>\n";
4774         }
4775
4776         my $alternate = 1;
4777         my $patchno = 0;
4778         foreach my $line (@{$difftree}) {
4779                 my $diff = parsed_difftree_line($line);
4780
4781                 if ($alternate) {
4782                         print "<tr class=\"dark\">\n";
4783                 } else {
4784                         print "<tr class=\"light\">\n";
4785                 }
4786                 $alternate ^= 1;
4787
4788                 if (exists $diff->{'nparents'}) { # combined diff
4789
4790                         fill_from_file_info($diff, @parents)
4791                                 unless exists $diff->{'from_file'};
4792
4793                         if (!is_deleted($diff)) {
4794                                 # file exists in the result (child) commit
4795                                 print "<td>" .
4796                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4797                                                              file_name=>$diff->{'to_file'},
4798                                                              hash_base=>$hash),
4799                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4800                                       "</td>\n";
4801                         } else {
4802                                 print "<td>" .
4803                                       esc_path($diff->{'to_file'}) .
4804                                       "</td>\n";
4805                         }
4806
4807                         if ($action eq 'commitdiff') {
4808                                 # link to patch
4809                                 $patchno++;
4810                                 print "<td class=\"link\">" .
4811                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4812                                               "patch") .
4813                                       " | " .
4814                                       "</td>\n";
4815                         }
4816
4817                         my $has_history = 0;
4818                         my $not_deleted = 0;
4819                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4820                                 my $hash_parent = $parents[$i];
4821                                 my $from_hash = $diff->{'from_id'}[$i];
4822                                 my $from_path = $diff->{'from_file'}[$i];
4823                                 my $status = $diff->{'status'}[$i];
4824
4825                                 $has_history ||= ($status ne 'A');
4826                                 $not_deleted ||= ($status ne 'D');
4827
4828                                 if ($status eq 'A') {
4829                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4830                                 } elsif ($status eq 'D') {
4831                                         print "<td class=\"link\">" .
4832                                               $cgi->a({-href => href(action=>"blob",
4833                                                                      hash_base=>$hash,
4834                                                                      hash=>$from_hash,
4835                                                                      file_name=>$from_path)},
4836                                                       "blob" . ($i+1)) .
4837                                               " | </td>\n";
4838                                 } else {
4839                                         if ($diff->{'to_id'} eq $from_hash) {
4840                                                 print "<td class=\"link nochange\">";
4841                                         } else {
4842                                                 print "<td class=\"link\">";
4843                                         }
4844                                         print $cgi->a({-href => href(action=>"blobdiff",
4845                                                                      hash=>$diff->{'to_id'},
4846                                                                      hash_parent=>$from_hash,
4847                                                                      hash_base=>$hash,
4848                                                                      hash_parent_base=>$hash_parent,
4849                                                                      file_name=>$diff->{'to_file'},
4850                                                                      file_parent=>$from_path)},
4851                                                       "diff" . ($i+1)) .
4852                                               " | </td>\n";
4853                                 }
4854                         }
4855
4856                         print "<td class=\"link\">";
4857                         if ($not_deleted) {
4858                                 print $cgi->a({-href => href(action=>"blob",
4859                                                              hash=>$diff->{'to_id'},
4860                                                              file_name=>$diff->{'to_file'},
4861                                                              hash_base=>$hash)},
4862                                               "blob");
4863                                 print " | " if ($has_history);
4864                         }
4865                         if ($has_history) {
4866                                 print $cgi->a({-href => href(action=>"history",
4867                                                              file_name=>$diff->{'to_file'},
4868                                                              hash_base=>$hash)},
4869                                               "history");
4870                         }
4871                         print "</td>\n";
4872
4873                         print "</tr>\n";
4874                         next; # instead of 'else' clause, to avoid extra indent
4875                 }
4876                 # else ordinary diff
4877
4878                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4879                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4880                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4881                         $to_mode_oct = oct $diff->{'to_mode'};
4882                         if (S_ISREG($to_mode_oct)) { # only for regular file
4883                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4884                         }
4885                         $to_file_type = file_type($diff->{'to_mode'});
4886                 }
4887                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4888                         $from_mode_oct = oct $diff->{'from_mode'};
4889                         if (S_ISREG($from_mode_oct)) { # only for regular file
4890                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4891                         }
4892                         $from_file_type = file_type($diff->{'from_mode'});
4893                 }
4894
4895                 if ($diff->{'status'} eq "A") { # created
4896                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4897                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4898                         $mode_chng   .= "]</span>";
4899                         print "<td>";
4900                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4901                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4902                                       -class => "list"}, esc_path($diff->{'file'}));
4903                         print "</td>\n";
4904                         print "<td>$mode_chng</td>\n";
4905                         print "<td class=\"link\">";
4906                         if ($action eq 'commitdiff') {
4907                                 # link to patch
4908                                 $patchno++;
4909                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4910                                               "patch") .
4911                                       " | ";
4912                         }
4913                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4914                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4915                                       "blob");
4916                         print "</td>\n";
4917
4918                 } elsif ($diff->{'status'} eq "D") { # deleted
4919                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4920                         print "<td>";
4921                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4922                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4923                                        -class => "list"}, esc_path($diff->{'file'}));
4924                         print "</td>\n";
4925                         print "<td>$mode_chng</td>\n";
4926                         print "<td class=\"link\">";
4927                         if ($action eq 'commitdiff') {
4928                                 # link to patch
4929                                 $patchno++;
4930                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4931                                               "patch") .
4932                                       " | ";
4933                         }
4934                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4935                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4936                                       "blob") . " | ";
4937                         if ($have_blame) {
4938                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4939                                                              file_name=>$diff->{'file'})},
4940                                               "blame") . " | ";
4941                         }
4942                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4943                                                      file_name=>$diff->{'file'})},
4944                                       "history");
4945                         print "</td>\n";
4946
4947                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4948                         my $mode_chnge = "";
4949                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4950                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4951                                 if ($from_file_type ne $to_file_type) {
4952                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4953                                 }
4954                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4955                                         if ($from_mode_str && $to_mode_str) {
4956                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4957                                         } elsif ($to_mode_str) {
4958                                                 $mode_chnge .= " mode: $to_mode_str";
4959                                         }
4960                                 }
4961                                 $mode_chnge .= "]</span>\n";
4962                         }
4963                         print "<td>";
4964                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4965                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4966                                       -class => "list"}, esc_path($diff->{'file'}));
4967                         print "</td>\n";
4968                         print "<td>$mode_chnge</td>\n";
4969                         print "<td class=\"link\">";
4970                         if ($action eq 'commitdiff') {
4971                                 # link to patch
4972                                 $patchno++;
4973                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4974                                               "patch") .
4975                                       " | ";
4976                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4977                                 # "commit" view and modified file (not onlu mode changed)
4978                                 print $cgi->a({-href => href(action=>"blobdiff",
4979                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4980                                                              hash_base=>$hash, hash_parent_base=>$parent,
4981                                                              file_name=>$diff->{'file'})},
4982                                               "diff") .
4983                                       " | ";
4984                         }
4985                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4986                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4987                                        "blob") . " | ";
4988                         if ($have_blame) {
4989                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4990                                                              file_name=>$diff->{'file'})},
4991                                               "blame") . " | ";
4992                         }
4993                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4994                                                      file_name=>$diff->{'file'})},
4995                                       "history");
4996                         print "</td>\n";
4997
4998                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4999                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5000                         my $nstatus = $status_name{$diff->{'status'}};
5001                         my $mode_chng = "";
5002                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5003                                 # mode also for directories, so we cannot use $to_mode_str
5004                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5005                         }
5006                         print "<td>" .
5007                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5008                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5009                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5010                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5011                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5012                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5013                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5014                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5015                               "<td class=\"link\">";
5016                         if ($action eq 'commitdiff') {
5017                                 # link to patch
5018                                 $patchno++;
5019                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5020                                               "patch") .
5021                                       " | ";
5022                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5023                                 # "commit" view and modified file (not only pure rename or copy)
5024                                 print $cgi->a({-href => href(action=>"blobdiff",
5025                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5026                                                              hash_base=>$hash, hash_parent_base=>$parent,
5027                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5028                                               "diff") .
5029                                       " | ";
5030                         }
5031                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5032                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5033                                       "blob") . " | ";
5034                         if ($have_blame) {
5035                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5036                                                              file_name=>$diff->{'to_file'})},
5037                                               "blame") . " | ";
5038                         }
5039                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5040                                                     file_name=>$diff->{'to_file'})},
5041                                       "history");
5042                         print "</td>\n";
5043
5044                 } # we should not encounter Unmerged (U) or Unknown (X) status
5045                 print "</tr>\n";
5046         }
5047         print "</tbody>" if $has_header;
5048         print "</table>\n";
5049 }
5050
5051 # Print context lines and then rem/add lines in a side-by-side manner.
5052 sub print_sidebyside_diff_lines {
5053         my ($ctx, $rem, $add) = @_;
5054
5055         # print context block before add/rem block
5056         if (@$ctx) {
5057                 print join '',
5058                         '<div class="chunk_block ctx">',
5059                                 '<div class="old">',
5060                                 @$ctx,
5061                                 '</div>',
5062                                 '<div class="new">',
5063                                 @$ctx,
5064                                 '</div>',
5065                         '</div>';
5066         }
5067
5068         if (!@$add) {
5069                 # pure removal
5070                 print join '',
5071                         '<div class="chunk_block rem">',
5072                                 '<div class="old">',
5073                                 @$rem,
5074                                 '</div>',
5075                         '</div>';
5076         } elsif (!@$rem) {
5077                 # pure addition
5078                 print join '',
5079                         '<div class="chunk_block add">',
5080                                 '<div class="new">',
5081                                 @$add,
5082                                 '</div>',
5083                         '</div>';
5084         } else {
5085                 print join '',
5086                         '<div class="chunk_block chg">',
5087                                 '<div class="old">',
5088                                 @$rem,
5089                                 '</div>',
5090                                 '<div class="new">',
5091                                 @$add,
5092                                 '</div>',
5093                         '</div>';
5094         }
5095 }
5096
5097 # Print context lines and then rem/add lines in inline manner.
5098 sub print_inline_diff_lines {
5099         my ($ctx, $rem, $add) = @_;
5100
5101         print @$ctx, @$rem, @$add;
5102 }
5103
5104 # Format removed and added line, mark changed part and HTML-format them.
5105 # Implementation is based on contrib/diff-highlight
5106 sub format_rem_add_lines_pair {
5107         my ($rem, $add, $num_parents) = @_;
5108
5109         # We need to untabify lines before split()'ing them;
5110         # otherwise offsets would be invalid.
5111         chomp $rem;
5112         chomp $add;
5113         $rem = untabify($rem);
5114         $add = untabify($add);
5115
5116         my @rem = split(//, $rem);
5117         my @add = split(//, $add);
5118         my ($esc_rem, $esc_add);
5119         # Ignore leading +/- characters for each parent.
5120         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5121         my ($prefix_has_nonspace, $suffix_has_nonspace);
5122
5123         my $shorter = (@rem < @add) ? @rem : @add;
5124         while ($prefix_len < $shorter) {
5125                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5126
5127                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5128                 $prefix_len++;
5129         }
5130
5131         while ($prefix_len + $suffix_len < $shorter) {
5132                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5133
5134                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5135                 $suffix_len++;
5136         }
5137
5138         # Mark lines that are different from each other, but have some common
5139         # part that isn't whitespace.  If lines are completely different, don't
5140         # mark them because that would make output unreadable, especially if
5141         # diff consists of multiple lines.
5142         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5143                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5144                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5145                 $esc_add = esc_html_hl_regions($add, 'marked',
5146                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5147         } else {
5148                 $esc_rem = esc_html($rem, -nbsp=>1);
5149                 $esc_add = esc_html($add, -nbsp=>1);
5150         }
5151
5152         return format_diff_line(\$esc_rem, 'rem'),
5153                format_diff_line(\$esc_add, 'add');
5154 }
5155
5156 # HTML-format diff context, removed and added lines.
5157 sub format_ctx_rem_add_lines {
5158         my ($ctx, $rem, $add, $num_parents) = @_;
5159         my (@new_ctx, @new_rem, @new_add);
5160         my $can_highlight = 0;
5161         my $is_combined = ($num_parents > 1);
5162
5163         # Highlight if every removed line has a corresponding added line.
5164         if (@$add > 0 && @$add == @$rem) {
5165                 $can_highlight = 1;
5166
5167                 # Highlight lines in combined diff only if the chunk contains
5168                 # diff between the same version, e.g.
5169                 #
5170                 #    - a
5171                 #   -  b
5172                 #    + c
5173                 #   +  d
5174                 #
5175                 # Otherwise the highlightling would be confusing.
5176                 if ($is_combined) {
5177                         for (my $i = 0; $i < @$add; $i++) {
5178                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5179                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5180
5181                                 $prefix_rem =~ s/-/+/g;
5182
5183                                 if ($prefix_rem ne $prefix_add) {
5184                                         $can_highlight = 0;
5185                                         last;
5186                                 }
5187                         }
5188                 }
5189         }
5190
5191         if ($can_highlight) {
5192                 for (my $i = 0; $i < @$add; $i++) {
5193                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5194                                 $rem->[$i], $add->[$i], $num_parents);
5195                         push @new_rem, $line_rem;
5196                         push @new_add, $line_add;
5197                 }
5198         } else {
5199                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5200                 @new_add = map { format_diff_line($_, 'add') } @$add;
5201         }
5202
5203         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5204
5205         return (\@new_ctx, \@new_rem, \@new_add);
5206 }
5207
5208 # Print context lines and then rem/add lines.
5209 sub print_diff_lines {
5210         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5211         my $is_combined = $num_parents > 1;
5212
5213         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5214                 $num_parents);
5215
5216         if ($diff_style eq 'sidebyside' && !$is_combined) {
5217                 print_sidebyside_diff_lines($ctx, $rem, $add);
5218         } else {
5219                 # default 'inline' style and unknown styles
5220                 print_inline_diff_lines($ctx, $rem, $add);
5221         }
5222 }
5223
5224 sub print_diff_chunk {
5225         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5226         my (@ctx, @rem, @add);
5227
5228         # The class of the previous line.
5229         my $prev_class = '';
5230
5231         return unless @chunk;
5232
5233         # incomplete last line might be among removed or added lines,
5234         # or both, or among context lines: find which
5235         for (my $i = 1; $i < @chunk; $i++) {
5236                 if ($chunk[$i][0] eq 'incomplete') {
5237                         $chunk[$i][0] = $chunk[$i-1][0];
5238                 }
5239         }
5240
5241         # guardian
5242         push @chunk, ["", ""];
5243
5244         foreach my $line_info (@chunk) {
5245                 my ($class, $line) = @$line_info;
5246
5247                 # print chunk headers
5248                 if ($class && $class eq 'chunk_header') {
5249                         print format_diff_line($line, $class, $from, $to);
5250                         next;
5251                 }
5252
5253                 ## print from accumulator when have some add/rem lines or end
5254                 # of chunk (flush context lines), or when have add and rem
5255                 # lines and new block is reached (otherwise add/rem lines could
5256                 # be reordered)
5257                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5258                     (@rem && @add && $class ne $prev_class)) {
5259                         print_diff_lines(\@ctx, \@rem, \@add,
5260                                          $diff_style, $num_parents);
5261                         @ctx = @rem = @add = ();
5262                 }
5263
5264                 ## adding lines to accumulator
5265                 # guardian value
5266                 last unless $line;
5267                 # rem, add or change
5268                 if ($class eq 'rem') {
5269                         push @rem, $line;
5270                 } elsif ($class eq 'add') {
5271                         push @add, $line;
5272                 }
5273                 # context line
5274                 if ($class eq 'ctx') {
5275                         push @ctx, $line;
5276                 }
5277
5278                 $prev_class = $class;
5279         }
5280 }
5281
5282 sub git_patchset_body {
5283         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5284         my ($hash_parent) = $hash_parents[0];
5285
5286         my $is_combined = (@hash_parents > 1);
5287         my $patch_idx = 0;
5288         my $patch_number = 0;
5289         my $patch_line;
5290         my $diffinfo;
5291         my $to_name;
5292         my (%from, %to);
5293         my @chunk; # for side-by-side diff
5294
5295         print "<div class=\"patchset\">\n";
5296
5297         # skip to first patch
5298         while ($patch_line = <$fd>) {
5299                 chomp $patch_line;
5300
5301                 last if ($patch_line =~ m/^diff /);
5302         }
5303
5304  PATCH:
5305         while ($patch_line) {
5306
5307                 # parse "git diff" header line
5308                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5309                         # $1 is from_name, which we do not use
5310                         $to_name = unquote($2);
5311                         $to_name =~ s!^b/!!;
5312                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5313                         # $1 is 'cc' or 'combined', which we do not use
5314                         $to_name = unquote($2);
5315                 } else {
5316                         $to_name = undef;
5317                 }
5318
5319                 # check if current patch belong to current raw line
5320                 # and parse raw git-diff line if needed
5321                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5322                         # this is continuation of a split patch
5323                         print "<div class=\"patch cont\">\n";
5324                 } else {
5325                         # advance raw git-diff output if needed
5326                         $patch_idx++ if defined $diffinfo;
5327
5328                         # read and prepare patch information
5329                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5330
5331                         # compact combined diff output can have some patches skipped
5332                         # find which patch (using pathname of result) we are at now;
5333                         if ($is_combined) {
5334                                 while ($to_name ne $diffinfo->{'to_file'}) {
5335                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5336                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5337                                               "</div>\n";  # class="patch"
5338
5339                                         $patch_idx++;
5340                                         $patch_number++;
5341
5342                                         last if $patch_idx > $#$difftree;
5343                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5344                                 }
5345                         }
5346
5347                         # modifies %from, %to hashes
5348                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5349
5350                         # this is first patch for raw difftree line with $patch_idx index
5351                         # we index @$difftree array from 0, but number patches from 1
5352                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5353                 }
5354
5355                 # git diff header
5356                 #assert($patch_line =~ m/^diff /) if DEBUG;
5357                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5358                 $patch_number++;
5359                 # print "git diff" header
5360                 print format_git_diff_header_line($patch_line, $diffinfo,
5361                                                   \%from, \%to);
5362
5363                 # print extended diff header
5364                 print "<div class=\"diff extended_header\">\n";
5365         EXTENDED_HEADER:
5366                 while ($patch_line = <$fd>) {
5367                         chomp $patch_line;
5368
5369                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5370
5371                         print format_extended_diff_header_line($patch_line, $diffinfo,
5372                                                                \%from, \%to);
5373                 }
5374                 print "</div>\n"; # class="diff extended_header"
5375
5376                 # from-file/to-file diff header
5377                 if (! $patch_line) {
5378                         print "</div>\n"; # class="patch"
5379                         last PATCH;
5380                 }
5381                 next PATCH if ($patch_line =~ m/^diff /);
5382                 #assert($patch_line =~ m/^---/) if DEBUG;
5383
5384                 my $last_patch_line = $patch_line;
5385                 $patch_line = <$fd>;
5386                 chomp $patch_line;
5387                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5388
5389                 print format_diff_from_to_header($last_patch_line, $patch_line,
5390                                                  $diffinfo, \%from, \%to,
5391                                                  @hash_parents);
5392
5393                 # the patch itself
5394         LINE:
5395                 while ($patch_line = <$fd>) {
5396                         chomp $patch_line;
5397
5398                         next PATCH if ($patch_line =~ m/^diff /);
5399
5400                         my $class = diff_line_class($patch_line, \%from, \%to);
5401
5402                         if ($class eq 'chunk_header') {
5403                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5404                                 @chunk = ();
5405                         }
5406
5407                         push @chunk, [ $class, $patch_line ];
5408                 }
5409
5410         } continue {
5411                 if (@chunk) {
5412                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5413                         @chunk = ();
5414                 }
5415                 print "</div>\n"; # class="patch"
5416         }
5417
5418         # for compact combined (--cc) format, with chunk and patch simplification
5419         # the patchset might be empty, but there might be unprocessed raw lines
5420         for (++$patch_idx if $patch_number > 0;
5421              $patch_idx < @$difftree;
5422              ++$patch_idx) {
5423                 # read and prepare patch information
5424                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5425
5426                 # generate anchor for "patch" links in difftree / whatchanged part
5427                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5428                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5429                       "</div>\n";  # class="patch"
5430
5431                 $patch_number++;
5432         }
5433
5434         if ($patch_number == 0) {
5435                 if (@hash_parents > 1) {
5436                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5437                 } else {
5438                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5439                 }
5440         }
5441
5442         print "</div>\n"; # class="patchset"
5443 }
5444
5445 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5446
5447 sub git_project_search_form {
5448         my ($searchtext, $search_use_regexp) = @_;
5449
5450         my $limit = '';
5451         if ($project_filter) {
5452                 $limit = " in '$project_filter/'";
5453         }
5454
5455         print "<div class=\"projsearch\">\n";
5456         print $cgi->startform(-method => 'get', -action => $my_uri) .
5457               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5458         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5459                 if (defined $project_filter);
5460         print $cgi->textfield(-name => 's', -value => $searchtext,
5461                               -title => "Search project by name and description$limit",
5462                               -size => 60) . "\n" .
5463               "<span title=\"Extended regular expression\">" .
5464               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5465                              -checked => $search_use_regexp) .
5466               "</span>\n" .
5467               $cgi->submit(-name => 'btnS', -value => 'Search') .
5468               $cgi->end_form() . "\n" .
5469               $cgi->a({-href => href(project => undef, searchtext => undef,
5470                                      project_filter => $project_filter)},
5471                       esc_html("List all projects$limit")) . "<br />\n";
5472         print "</div>\n";
5473 }
5474
5475 # entry for given @keys needs filling if at least one of keys in list
5476 # is not present in %$project_info
5477 sub project_info_needs_filling {
5478         my ($project_info, @keys) = @_;
5479
5480         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5481         foreach my $key (@keys) {
5482                 if (!exists $project_info->{$key}) {
5483                         return 1;
5484                 }
5485         }
5486         return;
5487 }
5488
5489 # fills project list info (age, description, owner, category, forks, etc.)
5490 # for each project in the list, removing invalid projects from
5491 # returned list, or fill only specified info.
5492 #
5493 # Invalid projects are removed from the returned list if and only if you
5494 # ask 'age' or 'age_string' to be filled, because they are the only fields
5495 # that run unconditionally git command that requires repository, and
5496 # therefore do always check if project repository is invalid.
5497 #
5498 # USAGE:
5499 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5500 #   ensures that 'descr_long' and 'ctags' fields are filled
5501 # * @project_list = fill_project_list_info(\@project_list)
5502 #   ensures that all fields are filled (and invalid projects removed)
5503 #
5504 # NOTE: modifies $projlist, but does not remove entries from it
5505 sub fill_project_list_info {
5506         my ($projlist, @wanted_keys) = @_;
5507         my @projects;
5508         my $filter_set = sub { return @_; };
5509         if (@wanted_keys) {
5510                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5511                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5512         }
5513
5514         my $show_ctags = gitweb_check_feature('ctags');
5515  PROJECT:
5516         foreach my $pr (@$projlist) {
5517                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5518                         my (@activity) = git_get_last_activity($pr->{'path'});
5519                         unless (@activity) {
5520                                 next PROJECT;
5521                         }
5522                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5523                 }
5524                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5525                         my $descr = git_get_project_description($pr->{'path'}) || "";
5526                         $descr = to_utf8($descr);
5527                         $pr->{'descr_long'} = $descr;
5528                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5529                 }
5530                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5531                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5532                 }
5533                 if ($show_ctags &&
5534                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5535                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5536                 }
5537                 if ($projects_list_group_categories &&
5538                     project_info_needs_filling($pr, $filter_set->('category'))) {
5539                         my $cat = git_get_project_category($pr->{'path'}) ||
5540                                                            $project_list_default_category;
5541                         $pr->{'category'} = to_utf8($cat);
5542                 }
5543
5544                 push @projects, $pr;
5545         }
5546
5547         return @projects;
5548 }
5549
5550 sub sort_projects_list {
5551         my ($projlist, $order) = @_;
5552         my @projects;
5553
5554         my %order_info = (
5555                 project => { key => 'path', type => 'str' },
5556                 descr => { key => 'descr_long', type => 'str' },
5557                 owner => { key => 'owner', type => 'str' },
5558                 age => { key => 'age', type => 'num' }
5559         );
5560         my $oi = $order_info{$order};
5561         return @$projlist unless defined $oi;
5562         if ($oi->{'type'} eq 'str') {
5563                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5564         } else {
5565                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5566         }
5567
5568         return @projects;
5569 }
5570
5571 # returns a hash of categories, containing the list of project
5572 # belonging to each category
5573 sub build_projlist_by_category {
5574         my ($projlist, $from, $to) = @_;
5575         my %categories;
5576
5577         $from = 0 unless defined $from;
5578         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5579
5580         for (my $i = $from; $i <= $to; $i++) {
5581                 my $pr = $projlist->[$i];
5582                 push @{$categories{ $pr->{'category'} }}, $pr;
5583         }
5584
5585         return wantarray ? %categories : \%categories;
5586 }
5587
5588 # print 'sort by' <th> element, generating 'sort by $name' replay link
5589 # if that order is not selected
5590 sub print_sort_th {
5591         print format_sort_th(@_);
5592 }
5593
5594 sub format_sort_th {
5595         my ($name, $order, $header) = @_;
5596         my $sort_th = "";
5597         $header ||= ucfirst($name);
5598
5599         if ($order eq $name) {
5600                 $sort_th .= "<th>$header</th>\n";
5601         } else {
5602                 $sort_th .= "<th>" .
5603                             $cgi->a({-href => href(-replay=>1, order=>$name),
5604                                      -class => "header"}, $header) .
5605                             "</th>\n";
5606         }
5607
5608         return $sort_th;
5609 }
5610
5611 sub git_project_list_rows {
5612         my ($projlist, $from, $to, $check_forks) = @_;
5613
5614         $from = 0 unless defined $from;
5615         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5616
5617         my $alternate = 1;
5618         for (my $i = $from; $i <= $to; $i++) {
5619                 my $pr = $projlist->[$i];
5620
5621                 if ($alternate) {
5622                         print "<tr class=\"dark\">\n";
5623                 } else {
5624                         print "<tr class=\"light\">\n";
5625                 }
5626                 $alternate ^= 1;
5627
5628                 if ($check_forks) {
5629                         print "<td>";
5630                         if ($pr->{'forks'}) {
5631                                 my $nforks = scalar @{$pr->{'forks'}};
5632                                 if ($nforks > 0) {
5633                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5634                                                        -title => "$nforks forks"}, "+");
5635                                 } else {
5636                                         print $cgi->span({-title => "$nforks forks"}, "+");
5637                                 }
5638                         }
5639                         print "</td>\n";
5640                 }
5641                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5642                                         -class => "list"},
5643                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5644                       "</td>\n" .
5645                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5646                                         -class => "list",
5647                                         -title => $pr->{'descr_long'}},
5648                                         $search_regexp
5649                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5650                                                                     $pr->{'descr'}, $search_regexp)
5651                                         : esc_html($pr->{'descr'})) .
5652                       "</td>\n";
5653                 unless ($omit_owner) {
5654                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5655                 }
5656                 unless ($omit_age_column) {
5657                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5658                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5659                 }
5660                 print"<td class=\"link\">" .
5661                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5662                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5663                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5664                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5665                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5666                       "</td>\n" .
5667                       "</tr>\n";
5668         }
5669 }
5670
5671 sub git_project_list_body {
5672         # actually uses global variable $project
5673         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5674         my @projects = @$projlist;
5675
5676         my $check_forks = gitweb_check_feature('forks');
5677         my $show_ctags  = gitweb_check_feature('ctags');
5678         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5679         $check_forks = undef
5680                 if ($tagfilter || $search_regexp);
5681
5682         # filtering out forks before filling info allows to do less work
5683         @projects = filter_forks_from_projects_list(\@projects)
5684                 if ($check_forks);
5685         # search_projects_list pre-fills required info
5686         @projects = search_projects_list(\@projects,
5687                                          'search_regexp' => $search_regexp,
5688                                          'tagfilter'  => $tagfilter)
5689                 if ($tagfilter || $search_regexp);
5690         # fill the rest
5691         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5692         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5693         push @all_fields, 'owner' unless($omit_owner);
5694         @projects = fill_project_list_info(\@projects, @all_fields);
5695
5696         $order ||= $default_projects_order;
5697         $from = 0 unless defined $from;
5698         $to = $#projects if (!defined $to || $#projects < $to);
5699
5700         # short circuit
5701         if ($from > $to) {
5702                 print "<center>\n".
5703                       "<b>No such projects found</b><br />\n".
5704                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5705                       "</center>\n<br />\n";
5706                 return;
5707         }
5708
5709         @projects = sort_projects_list(\@projects, $order);
5710
5711         if ($show_ctags) {
5712                 my $ctags = git_gather_all_ctags(\@projects);
5713                 my $cloud = git_populate_project_tagcloud($ctags);
5714                 print git_show_project_tagcloud($cloud, 64);
5715         }
5716
5717         print "<table class=\"project_list\">\n";
5718         unless ($no_header) {
5719                 print "<tr>\n";
5720                 if ($check_forks) {
5721                         print "<th></th>\n";
5722                 }
5723                 print_sort_th('project', $order, 'Project');
5724                 print_sort_th('descr', $order, 'Description');
5725                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5726                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5727                 print "<th></th>\n" . # for links
5728                       "</tr>\n";
5729         }
5730
5731         if ($projects_list_group_categories) {
5732                 # only display categories with projects in the $from-$to window
5733                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5734                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5735                 foreach my $cat (sort keys %categories) {
5736                         unless ($cat eq "") {
5737                                 print "<tr>\n";
5738                                 if ($check_forks) {
5739                                         print "<td></td>\n";
5740                                 }
5741                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5742                                 print "</tr>\n";
5743                         }
5744
5745                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5746                 }
5747         } else {
5748                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5749         }
5750
5751         if (defined $extra) {
5752                 print "<tr>\n";
5753                 if ($check_forks) {
5754                         print "<td></td>\n";
5755                 }
5756                 print "<td colspan=\"5\">$extra</td>\n" .
5757                       "</tr>\n";
5758         }
5759         print "</table>\n";
5760 }
5761
5762 sub git_log_body {
5763         # uses global variable $project
5764         my ($commitlist, $from, $to, $refs, $extra) = @_;
5765
5766         $from = 0 unless defined $from;
5767         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5768
5769         for (my $i = 0; $i <= $to; $i++) {
5770                 my %co = %{$commitlist->[$i]};
5771                 next if !%co;
5772                 my $commit = $co{'id'};
5773                 my $ref = format_ref_marker($refs, $commit);
5774                 git_print_header_div('commit',
5775                                "<span class=\"age\">$co{'age_string'}</span>" .
5776                                esc_html($co{'title'}) . $ref,
5777                                $commit);
5778                 print "<div class=\"title_text\">\n" .
5779                       "<div class=\"log_link\">\n" .
5780                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5781                       " | " .
5782                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5783                       " | " .
5784                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5785                       "<br/>\n" .
5786                       "</div>\n";
5787                       git_print_authorship(\%co, -tag => 'span');
5788                       print "<br/>\n</div>\n";
5789
5790                 print "<div class=\"log_body\">\n";
5791                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5792                 print "</div>\n";
5793         }
5794         if ($extra) {
5795                 print "<div class=\"page_nav\">\n";
5796                 print "$extra\n";
5797                 print "</div>\n";
5798         }
5799 }
5800
5801 sub git_shortlog_body {
5802         # uses global variable $project
5803         my ($commitlist, $from, $to, $refs, $extra) = @_;
5804
5805         $from = 0 unless defined $from;
5806         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5807
5808         print "<table class=\"shortlog\">\n";
5809         my $alternate = 1;
5810         for (my $i = $from; $i <= $to; $i++) {
5811                 my %co = %{$commitlist->[$i]};
5812                 my $commit = $co{'id'};
5813                 my $ref = format_ref_marker($refs, $commit);
5814                 if ($alternate) {
5815                         print "<tr class=\"dark\">\n";
5816                 } else {
5817                         print "<tr class=\"light\">\n";
5818                 }
5819                 $alternate ^= 1;
5820                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5821                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5822                       format_author_html('td', \%co, 10) . "<td>";
5823                 print format_subject_html($co{'title'}, $co{'title_short'},
5824                                           href(action=>"commit", hash=>$commit), $ref);
5825                 print "</td>\n" .
5826                       "<td class=\"link\">" .
5827                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5828                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5829                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5830                 my $snapshot_links = format_snapshot_links($commit);
5831                 if (defined $snapshot_links) {
5832                         print " | " . $snapshot_links;
5833                 }
5834                 print "</td>\n" .
5835                       "</tr>\n";
5836         }
5837         if (defined $extra) {
5838                 print "<tr>\n" .
5839                       "<td colspan=\"4\">$extra</td>\n" .
5840                       "</tr>\n";
5841         }
5842         print "</table>\n";
5843 }
5844
5845 sub git_history_body {
5846         # Warning: assumes constant type (blob or tree) during history
5847         my ($commitlist, $from, $to, $refs, $extra,
5848             $file_name, $file_hash, $ftype) = @_;
5849
5850         $from = 0 unless defined $from;
5851         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5852
5853         print "<table class=\"history\">\n";
5854         my $alternate = 1;
5855         for (my $i = $from; $i <= $to; $i++) {
5856                 my %co = %{$commitlist->[$i]};
5857                 if (!%co) {
5858                         next;
5859                 }
5860                 my $commit = $co{'id'};
5861
5862                 my $ref = format_ref_marker($refs, $commit);
5863
5864                 if ($alternate) {
5865                         print "<tr class=\"dark\">\n";
5866                 } else {
5867                         print "<tr class=\"light\">\n";
5868                 }
5869                 $alternate ^= 1;
5870                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5871         # shortlog:   format_author_html('td', \%co, 10)
5872                       format_author_html('td', \%co, 15, 3) . "<td>";
5873                 # originally git_history used chop_str($co{'title'}, 50)
5874                 print format_subject_html($co{'title'}, $co{'title_short'},
5875                                           href(action=>"commit", hash=>$commit), $ref);
5876                 print "</td>\n" .
5877                       "<td class=\"link\">" .
5878                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5879                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5880
5881                 if ($ftype eq 'blob') {
5882                         my $blob_current = $file_hash;
5883                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5884                         if (defined $blob_current && defined $blob_parent &&
5885                                         $blob_current ne $blob_parent) {
5886                                 print " | " .
5887                                         $cgi->a({-href => href(action=>"blobdiff",
5888                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5889                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5890                                                                file_name=>$file_name)},
5891                                                 "diff to current");
5892                         }
5893                 }
5894                 print "</td>\n" .
5895                       "</tr>\n";
5896         }
5897         if (defined $extra) {
5898                 print "<tr>\n" .
5899                       "<td colspan=\"4\">$extra</td>\n" .
5900                       "</tr>\n";
5901         }
5902         print "</table>\n";
5903 }
5904
5905 sub git_tags_body {
5906         # uses global variable $project
5907         my ($taglist, $from, $to, $extra) = @_;
5908         $from = 0 unless defined $from;
5909         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5910
5911         print "<table class=\"tags\">\n";
5912         my $alternate = 1;
5913         for (my $i = $from; $i <= $to; $i++) {
5914                 my $entry = $taglist->[$i];
5915                 my %tag = %$entry;
5916                 my $comment = $tag{'subject'};
5917                 my $comment_short;
5918                 if (defined $comment) {
5919                         $comment_short = chop_str($comment, 30, 5);
5920                 }
5921                 if ($alternate) {
5922                         print "<tr class=\"dark\">\n";
5923                 } else {
5924                         print "<tr class=\"light\">\n";
5925                 }
5926                 $alternate ^= 1;
5927                 if (defined $tag{'age'}) {
5928                         print "<td><i>$tag{'age'}</i></td>\n";
5929                 } else {
5930                         print "<td></td>\n";
5931                 }
5932                 print "<td>" .
5933                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5934                                -class => "list name"}, esc_html($tag{'name'})) .
5935                       "</td>\n" .
5936                       "<td>";
5937                 if (defined $comment) {
5938                         print format_subject_html($comment, $comment_short,
5939                                                   href(action=>"tag", hash=>$tag{'id'}));
5940                 }
5941                 print "</td>\n" .
5942                       "<td class=\"selflink\">";
5943                 if ($tag{'type'} eq "tag") {
5944                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5945                 } else {
5946                         print "&nbsp;";
5947                 }
5948                 print "</td>\n" .
5949                       "<td class=\"link\">" . " | " .
5950                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5951                 if ($tag{'reftype'} eq "commit") {
5952                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5953                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5954                 } elsif ($tag{'reftype'} eq "blob") {
5955                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5956                 }
5957                 print "</td>\n" .
5958                       "</tr>";
5959         }
5960         if (defined $extra) {
5961                 print "<tr>\n" .
5962                       "<td colspan=\"5\">$extra</td>\n" .
5963                       "</tr>\n";
5964         }
5965         print "</table>\n";
5966 }
5967
5968 sub git_heads_body {
5969         # uses global variable $project
5970         my ($headlist, $head_at, $from, $to, $extra) = @_;
5971         $from = 0 unless defined $from;
5972         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5973
5974         print "<table class=\"heads\">\n";
5975         my $alternate = 1;
5976         for (my $i = $from; $i <= $to; $i++) {
5977                 my $entry = $headlist->[$i];
5978                 my %ref = %$entry;
5979                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5980                 if ($alternate) {
5981                         print "<tr class=\"dark\">\n";
5982                 } else {
5983                         print "<tr class=\"light\">\n";
5984                 }
5985                 $alternate ^= 1;
5986                 print "<td><i>$ref{'age'}</i></td>\n" .
5987                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5988                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5989                                -class => "list name"},esc_html($ref{'name'})) .
5990                       "</td>\n" .
5991                       "<td class=\"link\">" .
5992                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5993                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5994                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5995                       "</td>\n" .
5996                       "</tr>";
5997         }
5998         if (defined $extra) {
5999                 print "<tr>\n" .
6000                       "<td colspan=\"3\">$extra</td>\n" .
6001                       "</tr>\n";
6002         }
6003         print "</table>\n";
6004 }
6005
6006 # Display a single remote block
6007 sub git_remote_block {
6008         my ($remote, $rdata, $limit, $head) = @_;
6009
6010         my $heads = $rdata->{'heads'};
6011         my $fetch = $rdata->{'fetch'};
6012         my $push = $rdata->{'push'};
6013
6014         my $urls_table = "<table class=\"projects_list\">\n" ;
6015
6016         if (defined $fetch) {
6017                 if ($fetch eq $push) {
6018                         $urls_table .= format_repo_url("URL", $fetch);
6019                 } else {
6020                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6021                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6022                 }
6023         } elsif (defined $push) {
6024                 $urls_table .= format_repo_url("Push URL", $push);
6025         } else {
6026                 $urls_table .= format_repo_url("", "No remote URL");
6027         }
6028
6029         $urls_table .= "</table>\n";
6030
6031         my $dots;
6032         if (defined $limit && $limit < @$heads) {
6033                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6034         }
6035
6036         print $urls_table;
6037         git_heads_body($heads, $head, 0, $limit, $dots);
6038 }
6039
6040 # Display a list of remote names with the respective fetch and push URLs
6041 sub git_remotes_list {
6042         my ($remotedata, $limit) = @_;
6043         print "<table class=\"heads\">\n";
6044         my $alternate = 1;
6045         my @remotes = sort keys %$remotedata;
6046
6047         my $limited = $limit && $limit < @remotes;
6048
6049         $#remotes = $limit - 1 if $limited;
6050
6051         while (my $remote = shift @remotes) {
6052                 my $rdata = $remotedata->{$remote};
6053                 my $fetch = $rdata->{'fetch'};
6054                 my $push = $rdata->{'push'};
6055                 if ($alternate) {
6056                         print "<tr class=\"dark\">\n";
6057                 } else {
6058                         print "<tr class=\"light\">\n";
6059                 }
6060                 $alternate ^= 1;
6061                 print "<td>" .
6062                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6063                                -class=> "list name"},esc_html($remote)) .
6064                       "</td>";
6065                 print "<td class=\"link\">" .
6066                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6067                       " | " .
6068                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6069                       "</td>";
6070
6071                 print "</tr>\n";
6072         }
6073
6074         if ($limited) {
6075                 print "<tr>\n" .
6076                       "<td colspan=\"3\">" .
6077                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6078                       "</td>\n" . "</tr>\n";
6079         }
6080
6081         print "</table>";
6082 }
6083
6084 # Display remote heads grouped by remote, unless there are too many
6085 # remotes, in which case we only display the remote names
6086 sub git_remotes_body {
6087         my ($remotedata, $limit, $head) = @_;
6088         if ($limit and $limit < keys %$remotedata) {
6089                 git_remotes_list($remotedata, $limit);
6090         } else {
6091                 fill_remote_heads($remotedata);
6092                 while (my ($remote, $rdata) = each %$remotedata) {
6093                         git_print_section({-class=>"remote", -id=>$remote},
6094                                 ["remotes", $remote, $remote], sub {
6095                                         git_remote_block($remote, $rdata, $limit, $head);
6096                                 });
6097                 }
6098         }
6099 }
6100
6101 sub git_search_message {
6102         my %co = @_;
6103
6104         my $greptype;
6105         if ($searchtype eq 'commit') {
6106                 $greptype = "--grep=";
6107         } elsif ($searchtype eq 'author') {
6108                 $greptype = "--author=";
6109         } elsif ($searchtype eq 'committer') {
6110                 $greptype = "--committer=";
6111         }
6112         $greptype .= $searchtext;
6113         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6114                                        $greptype, '--regexp-ignore-case',
6115                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6116
6117         my $paging_nav = '';
6118         if ($page > 0) {
6119                 $paging_nav .=
6120                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6121                                 "first") .
6122                         " &sdot; " .
6123                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6124                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6125         } else {
6126                 $paging_nav .= "first &sdot; prev";
6127         }
6128         my $next_link = '';
6129         if ($#commitlist >= 100) {
6130                 $next_link =
6131                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6132                                  -accesskey => "n", -title => "Alt-n"}, "next");
6133                 $paging_nav .= " &sdot; $next_link";
6134         } else {
6135                 $paging_nav .= " &sdot; next";
6136         }
6137
6138         git_header_html();
6139
6140         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6141         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6142         if ($page == 0 && !@commitlist) {
6143                 print "<p>No match.</p>\n";
6144         } else {
6145                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6146         }
6147
6148         git_footer_html();
6149 }
6150
6151 sub git_search_changes {
6152         my %co = @_;
6153
6154         local $/ = "\n";
6155         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6156                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6157                 ($search_use_regexp ? '--pickaxe-regex' : ())
6158                         or die_error(500, "Open git-log failed");
6159
6160         git_header_html();
6161
6162         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6163         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6164
6165         print "<table class=\"pickaxe search\">\n";
6166         my $alternate = 1;
6167         undef %co;
6168         my @files;
6169         while (my $line = <$fd>) {
6170                 chomp $line;
6171                 next unless $line;
6172
6173                 my %set = parse_difftree_raw_line($line);
6174                 if (defined $set{'commit'}) {
6175                         # finish previous commit
6176                         if (%co) {
6177                                 print "</td>\n" .
6178                                       "<td class=\"link\">" .
6179                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6180                                               "commit") .
6181                                       " | " .
6182                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6183                                                              hash_base=>$co{'id'})},
6184                                               "tree") .
6185                                       "</td>\n" .
6186                                       "</tr>\n";
6187                         }
6188
6189                         if ($alternate) {
6190                                 print "<tr class=\"dark\">\n";
6191                         } else {
6192                                 print "<tr class=\"light\">\n";
6193                         }
6194                         $alternate ^= 1;
6195                         %co = parse_commit($set{'commit'});
6196                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6197                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6198                               "<td><i>$author</i></td>\n" .
6199                               "<td>" .
6200                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6201                                       -class => "list subject"},
6202                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6203                 } elsif (defined $set{'to_id'}) {
6204                         next if ($set{'to_id'} =~ m/^0{40}$/);
6205
6206                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6207                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6208                                       -class => "list"},
6209                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6210                               "<br/>\n";
6211                 }
6212         }
6213         close $fd;
6214
6215         # finish last commit (warning: repetition!)
6216         if (%co) {
6217                 print "</td>\n" .
6218                       "<td class=\"link\">" .
6219                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6220                               "commit") .
6221                       " | " .
6222                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6223                                              hash_base=>$co{'id'})},
6224                               "tree") .
6225                       "</td>\n" .
6226                       "</tr>\n";
6227         }
6228
6229         print "</table>\n";
6230
6231         git_footer_html();
6232 }
6233
6234 sub git_search_files {
6235         my %co = @_;
6236
6237         local $/ = "\n";
6238         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6239                 $search_use_regexp ? ('-E', '-i') : '-F',
6240                 $searchtext, $co{'tree'}
6241                         or die_error(500, "Open git-grep failed");
6242
6243         git_header_html();
6244
6245         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6246         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6247
6248         print "<table class=\"grep_search\">\n";
6249         my $alternate = 1;
6250         my $matches = 0;
6251         my $lastfile = '';
6252         my $file_href;
6253         while (my $line = <$fd>) {
6254                 chomp $line;
6255                 my ($file, $lno, $ltext, $binary);
6256                 last if ($matches++ > 1000);
6257                 if ($line =~ /^Binary file (.+) matches$/) {
6258                         $file = $1;
6259                         $binary = 1;
6260                 } else {
6261                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6262                         $file =~ s/^$co{'tree'}://;
6263                 }
6264                 if ($file ne $lastfile) {
6265                         $lastfile and print "</td></tr>\n";
6266                         if ($alternate++) {
6267                                 print "<tr class=\"dark\">\n";
6268                         } else {
6269                                 print "<tr class=\"light\">\n";
6270                         }
6271                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6272                                           file_name=>$file);
6273                         print "<td class=\"list\">".
6274                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6275                         print "</td><td>\n";
6276                         $lastfile = $file;
6277                 }
6278                 if ($binary) {
6279                         print "<div class=\"binary\">Binary file</div>\n";
6280                 } else {
6281                         $ltext = untabify($ltext);
6282                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6283                                 $ltext = esc_html($1, -nbsp=>1);
6284                                 $ltext .= '<span class="match">';
6285                                 $ltext .= esc_html($2, -nbsp=>1);
6286                                 $ltext .= '</span>';
6287                                 $ltext .= esc_html($3, -nbsp=>1);
6288                         } else {
6289                                 $ltext = esc_html($ltext, -nbsp=>1);
6290                         }
6291                         print "<div class=\"pre\">" .
6292                                 $cgi->a({-href => $file_href.'#l'.$lno,
6293                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6294                                 ' ' .  $ltext . "</div>\n";
6295                 }
6296         }
6297         if ($lastfile) {
6298                 print "</td></tr>\n";
6299                 if ($matches > 1000) {
6300                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6301                 }
6302         } else {
6303                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6304         }
6305         close $fd;
6306
6307         print "</table>\n";
6308
6309         git_footer_html();
6310 }
6311
6312 sub git_search_grep_body {
6313         my ($commitlist, $from, $to, $extra) = @_;
6314         $from = 0 unless defined $from;
6315         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6316
6317         print "<table class=\"commit_search\">\n";
6318         my $alternate = 1;
6319         for (my $i = $from; $i <= $to; $i++) {
6320                 my %co = %{$commitlist->[$i]};
6321                 if (!%co) {
6322                         next;
6323                 }
6324                 my $commit = $co{'id'};
6325                 if ($alternate) {
6326                         print "<tr class=\"dark\">\n";
6327                 } else {
6328                         print "<tr class=\"light\">\n";
6329                 }
6330                 $alternate ^= 1;
6331                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6332                       format_author_html('td', \%co, 15, 5) .
6333                       "<td>" .
6334                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6335                                -class => "list subject"},
6336                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6337                 my $comment = $co{'comment'};
6338                 foreach my $line (@$comment) {
6339                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6340                                 my ($lead, $match, $trail) = ($1, $2, $3);
6341                                 $match = chop_str($match, 70, 5, 'center');
6342                                 my $contextlen = int((80 - length($match))/2);
6343                                 $contextlen = 30 if ($contextlen > 30);
6344                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6345                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6346
6347                                 $lead  = esc_html($lead);
6348                                 $match = esc_html($match);
6349                                 $trail = esc_html($trail);
6350
6351                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6352                         }
6353                 }
6354                 print "</td>\n" .
6355                       "<td class=\"link\">" .
6356                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6357                       " | " .
6358                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6359                       " | " .
6360                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6361                 print "</td>\n" .
6362                       "</tr>\n";
6363         }
6364         if (defined $extra) {
6365                 print "<tr>\n" .
6366                       "<td colspan=\"3\">$extra</td>\n" .
6367                       "</tr>\n";
6368         }
6369         print "</table>\n";
6370 }
6371
6372 ## ======================================================================
6373 ## ======================================================================
6374 ## actions
6375
6376 sub git_project_list {
6377         my $order = $input_params{'order'};
6378         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6379                 die_error(400, "Unknown order parameter");
6380         }
6381
6382         my @list = git_get_projects_list($project_filter, $strict_export);
6383         if (!@list) {
6384                 die_error(404, "No projects found");
6385         }
6386
6387         git_header_html();
6388         if (defined $home_text && -f $home_text) {
6389                 print "<div class=\"index_include\">\n";
6390                 insert_file($home_text);
6391                 print "</div>\n";
6392         }
6393
6394         git_project_search_form($searchtext, $search_use_regexp);
6395         git_project_list_body(\@list, $order);
6396         git_footer_html();
6397 }
6398
6399 sub git_forks {
6400         my $order = $input_params{'order'};
6401         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6402                 die_error(400, "Unknown order parameter");
6403         }
6404
6405         my $filter = $project;
6406         $filter =~ s/\.git$//;
6407         my @list = git_get_projects_list($filter);
6408         if (!@list) {
6409                 die_error(404, "No forks found");
6410         }
6411
6412         git_header_html();
6413         git_print_page_nav('','');
6414         git_print_header_div('summary', "$project forks");
6415         git_project_list_body(\@list, $order);
6416         git_footer_html();
6417 }
6418
6419 sub git_project_index {
6420         my @projects = git_get_projects_list($project_filter, $strict_export);
6421         if (!@projects) {
6422                 die_error(404, "No projects found");
6423         }
6424
6425         print $cgi->header(
6426                 -type => 'text/plain',
6427                 -charset => 'utf-8',
6428                 -content_disposition => 'inline; filename="index.aux"');
6429
6430         foreach my $pr (@projects) {
6431                 if (!exists $pr->{'owner'}) {
6432                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6433                 }
6434
6435                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6436                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6437                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6438                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6439                 $path  =~ s/ /\+/g;
6440                 $owner =~ s/ /\+/g;
6441
6442                 print "$path $owner\n";
6443         }
6444 }
6445
6446 sub git_summary {
6447         my $descr = git_get_project_description($project) || "none";
6448         my %co = parse_commit("HEAD");
6449         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6450         my $head = $co{'id'};
6451         my $remote_heads = gitweb_check_feature('remote_heads');
6452
6453         my $owner = git_get_project_owner($project);
6454
6455         my $refs = git_get_references();
6456         # These get_*_list functions return one more to allow us to see if
6457         # there are more ...
6458         my @taglist  = git_get_tags_list(16);
6459         my @headlist = git_get_heads_list(16);
6460         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6461         my @forklist;
6462         my $check_forks = gitweb_check_feature('forks');
6463
6464         if ($check_forks) {
6465                 # find forks of a project
6466                 my $filter = $project;
6467                 $filter =~ s/\.git$//;
6468                 @forklist = git_get_projects_list($filter);
6469                 # filter out forks of forks
6470                 @forklist = filter_forks_from_projects_list(\@forklist)
6471                         if (@forklist);
6472         }
6473
6474         git_header_html();
6475         git_print_page_nav('summary','', $head);
6476
6477         print "<div class=\"title\">&nbsp;</div>\n";
6478         print "<table class=\"projects_list\">\n" .
6479               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6480         unless ($omit_owner) {
6481                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6482         }
6483         if (defined $cd{'rfc2822'}) {
6484                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6485                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6486         }
6487
6488         # use per project git URL list in $projectroot/$project/cloneurl
6489         # or make project git URL from git base URL and project name
6490         my $url_tag = "URL";
6491         my @url_list = git_get_project_url_list($project);
6492         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6493         foreach my $git_url (@url_list) {
6494                 next unless $git_url;
6495                 print format_repo_url($url_tag, $git_url);
6496                 $url_tag = "";
6497         }
6498
6499         # Tag cloud
6500         my $show_ctags = gitweb_check_feature('ctags');
6501         if ($show_ctags) {
6502                 my $ctags = git_get_project_ctags($project);
6503                 if (%$ctags) {
6504                         # without ability to add tags, don't show if there are none
6505                         my $cloud = git_populate_project_tagcloud($ctags);
6506                         print "<tr id=\"metadata_ctags\">" .
6507                               "<td>content tags</td>" .
6508                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6509                               "</tr>\n";
6510                 }
6511         }
6512
6513         print "</table>\n";
6514
6515         # If XSS prevention is on, we don't include README.html.
6516         # TODO: Allow a readme in some safe format.
6517         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6518                 print "<div class=\"title\">readme</div>\n" .
6519                       "<div class=\"readme\">\n";
6520                 insert_file("$projectroot/$project/README.html");
6521                 print "\n</div>\n"; # class="readme"
6522         }
6523
6524         # we need to request one more than 16 (0..15) to check if
6525         # those 16 are all
6526         my @commitlist = $head ? parse_commits($head, 17) : ();
6527         if (@commitlist) {
6528                 git_print_header_div('shortlog');
6529                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6530                                   $#commitlist <=  15 ? undef :
6531                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6532         }
6533
6534         if (@taglist) {
6535                 git_print_header_div('tags');
6536                 git_tags_body(\@taglist, 0, 15,
6537                               $#taglist <=  15 ? undef :
6538                               $cgi->a({-href => href(action=>"tags")}, "..."));
6539         }
6540
6541         if (@headlist) {
6542                 git_print_header_div('heads');
6543                 git_heads_body(\@headlist, $head, 0, 15,
6544                                $#headlist <= 15 ? undef :
6545                                $cgi->a({-href => href(action=>"heads")}, "..."));
6546         }
6547
6548         if (%remotedata) {
6549                 git_print_header_div('remotes');
6550                 git_remotes_body(\%remotedata, 15, $head);
6551         }
6552
6553         if (@forklist) {
6554                 git_print_header_div('forks');
6555                 git_project_list_body(\@forklist, 'age', 0, 15,
6556                                       $#forklist <= 15 ? undef :
6557                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6558                                       'no_header');
6559         }
6560
6561         git_footer_html();
6562 }
6563
6564 sub git_tag {
6565         my %tag = parse_tag($hash);
6566
6567         if (! %tag) {
6568                 die_error(404, "Unknown tag object");
6569         }
6570
6571         my $head = git_get_head_hash($project);
6572         git_header_html();
6573         git_print_page_nav('','', $head,undef,$head);
6574         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6575         print "<div class=\"title_text\">\n" .
6576               "<table class=\"object_header\">\n" .
6577               "<tr>\n" .
6578               "<td>object</td>\n" .
6579               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6580                                $tag{'object'}) . "</td>\n" .
6581               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6582                                               $tag{'type'}) . "</td>\n" .
6583               "</tr>\n";
6584         if (defined($tag{'author'})) {
6585                 git_print_authorship_rows(\%tag, 'author');
6586         }
6587         print "</table>\n\n" .
6588               "</div>\n";
6589         print "<div class=\"page_body\">";
6590         my $comment = $tag{'comment'};
6591         foreach my $line (@$comment) {
6592                 chomp $line;
6593                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6594         }
6595         print "</div>\n";
6596         git_footer_html();
6597 }
6598
6599 sub git_blame_common {
6600         my $format = shift || 'porcelain';
6601         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6602                 $format = 'incremental';
6603                 $action = 'blame_incremental'; # for page title etc
6604         }
6605
6606         # permissions
6607         gitweb_check_feature('blame')
6608                 or die_error(403, "Blame view not allowed");
6609
6610         # error checking
6611         die_error(400, "No file name given") unless $file_name;
6612         $hash_base ||= git_get_head_hash($project);
6613         die_error(404, "Couldn't find base commit") unless $hash_base;
6614         my %co = parse_commit($hash_base)
6615                 or die_error(404, "Commit not found");
6616         my $ftype = "blob";
6617         if (!defined $hash) {
6618                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6619                         or die_error(404, "Error looking up file");
6620         } else {
6621                 $ftype = git_get_type($hash);
6622                 if ($ftype !~ "blob") {
6623                         die_error(400, "Object is not a blob");
6624                 }
6625         }
6626
6627         my $fd;
6628         if ($format eq 'incremental') {
6629                 # get file contents (as base)
6630                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6631                         or die_error(500, "Open git-cat-file failed");
6632         } elsif ($format eq 'data') {
6633                 # run git-blame --incremental
6634                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6635                         $hash_base, "--", $file_name
6636                         or die_error(500, "Open git-blame --incremental failed");
6637         } else {
6638                 # run git-blame --porcelain
6639                 open $fd, "-|", git_cmd(), "blame", '-p',
6640                         $hash_base, '--', $file_name
6641                         or die_error(500, "Open git-blame --porcelain failed");
6642         }
6643
6644         # incremental blame data returns early
6645         if ($format eq 'data') {
6646                 print $cgi->header(
6647                         -type=>"text/plain", -charset => "utf-8",
6648                         -status=> "200 OK");
6649                 local $| = 1; # output autoflush
6650                 while (my $line = <$fd>) {
6651                         print to_utf8($line);
6652                 }
6653                 close $fd
6654                         or print "ERROR $!\n";
6655
6656                 print 'END';
6657                 if (defined $t0 && gitweb_check_feature('timed')) {
6658                         print ' '.
6659                               tv_interval($t0, [ gettimeofday() ]).
6660                               ' '.$number_of_git_cmds;
6661                 }
6662                 print "\n";
6663
6664                 return;
6665         }
6666
6667         # page header
6668         git_header_html();
6669         my $formats_nav =
6670                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6671                         "blob") .
6672                 " | ";
6673         if ($format eq 'incremental') {
6674                 $formats_nav .=
6675                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6676                                 "blame") . " (non-incremental)";
6677         } else {
6678                 $formats_nav .=
6679                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6680                                 "blame") . " (incremental)";
6681         }
6682         $formats_nav .=
6683                 " | " .
6684                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6685                         "history") .
6686                 " | " .
6687                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6688                         "HEAD");
6689         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6690         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6691         git_print_page_path($file_name, $ftype, $hash_base);
6692
6693         # page body
6694         if ($format eq 'incremental') {
6695                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6696                       "This page requires JavaScript to run.\n Use ".
6697                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6698                               'this page').
6699                       " instead.\n".
6700                       "</b></center></div>\n</noscript>\n";
6701
6702                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6703         }
6704
6705         print qq!<div class="page_body">\n!;
6706         print qq!<div id="progress_info">... / ...</div>\n!
6707                 if ($format eq 'incremental');
6708         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6709               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6710               qq!<thead>\n!.
6711               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6712               qq!</thead>\n!.
6713               qq!<tbody>\n!;
6714
6715         my @rev_color = qw(light dark);
6716         my $num_colors = scalar(@rev_color);
6717         my $current_color = 0;
6718
6719         if ($format eq 'incremental') {
6720                 my $color_class = $rev_color[$current_color];
6721
6722                 #contents of a file
6723                 my $linenr = 0;
6724         LINE:
6725                 while (my $line = <$fd>) {
6726                         chomp $line;
6727                         $linenr++;
6728
6729                         print qq!<tr id="l$linenr" class="$color_class">!.
6730                               qq!<td class="sha1"><a href=""> </a></td>!.
6731                               qq!<td class="linenr">!.
6732                               qq!<a class="linenr" href="">$linenr</a></td>!;
6733                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6734                         print qq!</tr>\n!;
6735                 }
6736
6737         } else { # porcelain, i.e. ordinary blame
6738                 my %metainfo = (); # saves information about commits
6739
6740                 # blame data
6741         LINE:
6742                 while (my $line = <$fd>) {
6743                         chomp $line;
6744                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6745                         # no <lines in group> for subsequent lines in group of lines
6746                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6747                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6748                         if (!exists $metainfo{$full_rev}) {
6749                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6750                         }
6751                         my $meta = $metainfo{$full_rev};
6752                         my $data;
6753                         while ($data = <$fd>) {
6754                                 chomp $data;
6755                                 last if ($data =~ s/^\t//); # contents of line
6756                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6757                                         $meta->{$1} = $2 unless exists $meta->{$1};
6758                                 }
6759                                 if ($data =~ /^previous /) {
6760                                         $meta->{'nprevious'}++;
6761                                 }
6762                         }
6763                         my $short_rev = substr($full_rev, 0, 8);
6764                         my $author = $meta->{'author'};
6765                         my %date =
6766                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6767                         my $date = $date{'iso-tz'};
6768                         if ($group_size) {
6769                                 $current_color = ($current_color + 1) % $num_colors;
6770                         }
6771                         my $tr_class = $rev_color[$current_color];
6772                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6773                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6774                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6775                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6776                         if ($group_size) {
6777                                 print "<td class=\"sha1\"";
6778                                 print " title=\"". esc_html($author) . ", $date\"";
6779                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6780                                 print ">";
6781                                 print $cgi->a({-href => href(action=>"commit",
6782                                                              hash=>$full_rev,
6783                                                              file_name=>$file_name)},
6784                                               esc_html($short_rev));
6785                                 if ($group_size >= 2) {
6786                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6787                                         if (@author_initials) {
6788                                                 print "<br />" .
6789                                                       esc_html(join('', @author_initials));
6790                                                 #           or join('.', ...)
6791                                         }
6792                                 }
6793                                 print "</td>\n";
6794                         }
6795                         # 'previous' <sha1 of parent commit> <filename at commit>
6796                         if (exists $meta->{'previous'} &&
6797                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6798                                 $meta->{'parent'} = $1;
6799                                 $meta->{'file_parent'} = unquote($2);
6800                         }
6801                         my $linenr_commit =
6802                                 exists($meta->{'parent'}) ?
6803                                 $meta->{'parent'} : $full_rev;
6804                         my $linenr_filename =
6805                                 exists($meta->{'file_parent'}) ?
6806                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6807                         my $blamed = href(action => 'blame',
6808                                           file_name => $linenr_filename,
6809                                           hash_base => $linenr_commit);
6810                         print "<td class=\"linenr\">";
6811                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6812                                         -class => "linenr" },
6813                                       esc_html($lineno));
6814                         print "</td>";
6815                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6816                         print "</tr>\n";
6817                 } # end while
6818
6819         }
6820
6821         # footer
6822         print "</tbody>\n".
6823               "</table>\n"; # class="blame"
6824         print "</div>\n";   # class="blame_body"
6825         close $fd
6826                 or print "Reading blob failed\n";
6827
6828         git_footer_html();
6829 }
6830
6831 sub git_blame {
6832         git_blame_common();
6833 }
6834
6835 sub git_blame_incremental {
6836         git_blame_common('incremental');
6837 }
6838
6839 sub git_blame_data {
6840         git_blame_common('data');
6841 }
6842
6843 sub git_tags {
6844         my $head = git_get_head_hash($project);
6845         git_header_html();
6846         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6847         git_print_header_div('summary', $project);
6848
6849         my @tagslist = git_get_tags_list();
6850         if (@tagslist) {
6851                 git_tags_body(\@tagslist);
6852         }
6853         git_footer_html();
6854 }
6855
6856 sub git_heads {
6857         my $head = git_get_head_hash($project);
6858         git_header_html();
6859         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6860         git_print_header_div('summary', $project);
6861
6862         my @headslist = git_get_heads_list();
6863         if (@headslist) {
6864                 git_heads_body(\@headslist, $head);
6865         }
6866         git_footer_html();
6867 }
6868
6869 # used both for single remote view and for list of all the remotes
6870 sub git_remotes {
6871         gitweb_check_feature('remote_heads')
6872                 or die_error(403, "Remote heads view is disabled");
6873
6874         my $head = git_get_head_hash($project);
6875         my $remote = $input_params{'hash'};
6876
6877         my $remotedata = git_get_remotes_list($remote);
6878         die_error(500, "Unable to get remote information") unless defined $remotedata;
6879
6880         unless (%$remotedata) {
6881                 die_error(404, defined $remote ?
6882                         "Remote $remote not found" :
6883                         "No remotes found");
6884         }
6885
6886         git_header_html(undef, undef, -action_extra => $remote);
6887         git_print_page_nav('', '',  $head, undef, $head,
6888                 format_ref_views($remote ? '' : 'remotes'));
6889
6890         fill_remote_heads($remotedata);
6891         if (defined $remote) {
6892                 git_print_header_div('remotes', "$remote remote for $project");
6893                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6894         } else {
6895                 git_print_header_div('summary', "$project remotes");
6896                 git_remotes_body($remotedata, undef, $head);
6897         }
6898
6899         git_footer_html();
6900 }
6901
6902 sub git_blob_plain {
6903         my $type = shift;
6904         my $expires;
6905
6906         if (!defined $hash) {
6907                 if (defined $file_name) {
6908                         my $base = $hash_base || git_get_head_hash($project);
6909                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6910                                 or die_error(404, "Cannot find file");
6911                 } else {
6912                         die_error(400, "No file name defined");
6913                 }
6914         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6915                 # blobs defined by non-textual hash id's can be cached
6916                 $expires = "+1d";
6917         }
6918
6919         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6920                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6921
6922         # content-type (can include charset)
6923         $type = blob_contenttype($fd, $file_name, $type);
6924
6925         # "save as" filename, even when no $file_name is given
6926         my $save_as = "$hash";
6927         if (defined $file_name) {
6928                 $save_as = $file_name;
6929         } elsif ($type =~ m/^text\//) {
6930                 $save_as .= '.txt';
6931         }
6932
6933         # With XSS prevention on, blobs of all types except a few known safe
6934         # ones are served with "Content-Disposition: attachment" to make sure
6935         # they don't run in our security domain.  For certain image types,
6936         # blob view writes an <img> tag referring to blob_plain view, and we
6937         # want to be sure not to break that by serving the image as an
6938         # attachment (though Firefox 3 doesn't seem to care).
6939         my $sandbox = $prevent_xss &&
6940                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6941
6942         # serve text/* as text/plain
6943         if ($prevent_xss &&
6944             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6945              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6946                 my $rest = $1;
6947                 $rest = defined $rest ? $rest : '';
6948                 $type = "text/plain$rest";
6949         }
6950
6951         print $cgi->header(
6952                 -type => $type,
6953                 -expires => $expires,
6954                 -content_disposition =>
6955                         ($sandbox ? 'attachment' : 'inline')
6956                         . '; filename="' . $save_as . '"');
6957         local $/ = undef;
6958         binmode STDOUT, ':raw';
6959         print <$fd>;
6960         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6961         close $fd;
6962 }
6963
6964 sub git_blob {
6965         my $expires;
6966
6967         if (!defined $hash) {
6968                 if (defined $file_name) {
6969                         my $base = $hash_base || git_get_head_hash($project);
6970                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6971                                 or die_error(404, "Cannot find file");
6972                 } else {
6973                         die_error(400, "No file name defined");
6974                 }
6975         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6976                 # blobs defined by non-textual hash id's can be cached
6977                 $expires = "+1d";
6978         }
6979
6980         my $have_blame = gitweb_check_feature('blame');
6981         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6982                 or die_error(500, "Couldn't cat $file_name, $hash");
6983         my $mimetype = blob_mimetype($fd, $file_name);
6984         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6985         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6986                 close $fd;
6987                 return git_blob_plain($mimetype);
6988         }
6989         # we can have blame only for text/* mimetype
6990         $have_blame &&= ($mimetype =~ m!^text/!);
6991
6992         my $highlight_js = gitweb_check_feature('syntaxhighlighter_js');
6993         if ($highlight_js) {
6994                 push @stylesheets, $highlight_js->{url} . '/styles/shCore'
6995                         . $highlight_js->{style} . '.css';
6996                 push @stylesheets, $highlight_js->{url} . '/styles/shTheme'
6997                         . $highlight_js->{theme} . '.css';
6998         }
6999
7000         my $highlight = gitweb_check_feature('highlight');
7001         if ($highlight_js && $highlight) {
7002                 die_error(500, 'The highlight and syntaxhighlighter_js are'
7003                         . 'mutually exclusive');
7004         }
7005         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7006         $fd = run_highlighter($fd, $highlight, $syntax)
7007                 if $syntax;
7008
7009         git_header_html(undef, $expires);
7010         my $formats_nav = '';
7011         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7012                 if (defined $file_name) {
7013                         if ($have_blame) {
7014                                 $formats_nav .=
7015                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7016                                                 "blame") .
7017                                         " | ";
7018                         }
7019                         $formats_nav .=
7020                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7021                                         "history") .
7022                                 " | " .
7023                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7024                                         "raw") .
7025                                 " | " .
7026                                 $cgi->a({-href => href(action=>"blob",
7027                                                        hash_base=>"HEAD", file_name=>$file_name)},
7028                                         "HEAD");
7029                 } else {
7030                         $formats_nav .=
7031                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7032                                         "raw");
7033                 }
7034                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7035                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7036         } else {
7037                 print "<div class=\"page_nav\">\n" .
7038                       "<br/><br/></div>\n" .
7039                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7040         }
7041         git_print_page_path($file_name, "blob", $hash_base);
7042         print "<div class=\"page_body\">\n";
7043         if ($mimetype =~ m!^image/!) {
7044                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7045                 if ($file_name) {
7046                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7047                 }
7048                 print qq! src="! .
7049                       href(action=>"blob_plain", hash=>$hash,
7050                            hash_base=>$hash_base, file_name=>$file_name) .
7051                       qq!" />\n!;
7052         } elsif ($highlight_js) {
7053                 my $ext = $file_name;
7054                 $ext =~ s/.*\.//;
7055                 print qq!<pre class="brush:!.$ext.qq!">!;
7056                 while (my $line = <$fd>) {
7057                         $line =~ s!&!\&#38;!g;
7058                         $line =~ s!<!\&#60;!g;
7059                         print $line;
7060                 }
7061                 print qq!</pre>!;
7062                 foreach my $name ('Core', 'Autoloader') {
7063                         print qq!<script src="!.$highlight_js->{url}
7064                                 .qq!/scripts/sh!.$name
7065                                 .qq!.js" type="text/javascript"></script>!;
7066                 }
7067                 print qq!<script type="text/javascript">!;
7068                 print qq!SyntaxHighlighter.defaults["pad-line-numbers"] = 3;!;
7069                 print qq!SyntaxHighlighter.defaults["toolbar"] = false;!;
7070                 # for XHTML compliance
7071                 print qq!SyntaxHighlighter.config["space"] = '&#160;';!;
7072                 print qq!SyntaxHighlighter.autoloader(!;
7073                 my $brush_prefix = $highlight_js->{url} . '/scripts/shBrush';
7074                 foreach my $language ('applescript AppleScript',
7075                                 'actionscript3 as3 AS3',
7076                                 'bash shell Bash',
7077                                 'clj Clojure',
7078                                 'coldfusion cf ColdFusion',
7079                                 'cpp c Cpp',
7080                                 'c# c-sharp csharp CSharp',
7081                                 'css Css',
7082                                 'delphi pascal Delphi',
7083                                 'diff patch pas Diff',
7084                                 'erl erlang Erlang',
7085                                 'groovy Groovy',
7086                                 'java Java',
7087                                 'jfx javafx JavaFX',
7088                                 'js jscript javascript JScript',
7089                                 'perl pl Perl',
7090                                 'php Php',
7091                                 'text plain Plain',
7092                                 'py python Python',
7093                                 'ruby rails ror rb Ruby',
7094                                 'scala Scala',
7095                                 'scm Scheme',
7096                                 'sql Sql',
7097                                 'vb vbnet Vb',
7098                                 'xml xhtml xslt html Xml') {
7099                         my $lang = $language;
7100                         $lang =~ s! (\S+)$! $brush_prefix$1!;
7101                         print "'".$lang.qq!.js',!;
7102                 }
7103                 print qq!''); SyntaxHighlighter.all();</script>!;
7104         } else {
7105                 my $nr;
7106                 while (my $line = <$fd>) {
7107                         chomp $line;
7108                         $nr++;
7109                         $line = untabify($line);
7110                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7111                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7112                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7113                 }
7114         }
7115         close $fd
7116                 or print "Reading blob failed.\n";
7117         print "</div>";
7118         git_footer_html();
7119 }
7120
7121 sub git_tree {
7122         if (!defined $hash_base) {
7123                 $hash_base = "HEAD";
7124         }
7125         if (!defined $hash) {
7126                 if (defined $file_name) {
7127                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7128                 } else {
7129                         $hash = $hash_base;
7130                 }
7131         }
7132         die_error(404, "No such tree") unless defined($hash);
7133
7134         my $show_sizes = gitweb_check_feature('show-sizes');
7135         my $have_blame = gitweb_check_feature('blame');
7136
7137         my @entries = ();
7138         {
7139                 local $/ = "\0";
7140                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7141                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7142                         or die_error(500, "Open git-ls-tree failed");
7143                 @entries = map { chomp; $_ } <$fd>;
7144                 close $fd
7145                         or die_error(404, "Reading tree failed");
7146         }
7147
7148         my $refs = git_get_references();
7149         my $ref = format_ref_marker($refs, $hash_base);
7150         git_header_html();
7151         my $basedir = '';
7152         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7153                 my @views_nav = ();
7154                 if (defined $file_name) {
7155                         push @views_nav,
7156                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7157                                         "history"),
7158                                 $cgi->a({-href => href(action=>"tree",
7159                                                        hash_base=>"HEAD", file_name=>$file_name)},
7160                                         "HEAD"),
7161                 }
7162                 my $snapshot_links = format_snapshot_links($hash);
7163                 if (defined $snapshot_links) {
7164                         # FIXME: Should be available when we have no hash base as well.
7165                         push @views_nav, $snapshot_links;
7166                 }
7167                 git_print_page_nav('tree','', $hash_base, undef, undef,
7168                                    join(' | ', @views_nav));
7169                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7170         } else {
7171                 undef $hash_base;
7172                 print "<div class=\"page_nav\">\n";
7173                 print "<br/><br/></div>\n";
7174                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7175         }
7176         if (defined $file_name) {
7177                 $basedir = $file_name;
7178                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7179                         $basedir .= '/';
7180                 }
7181                 git_print_page_path($file_name, 'tree', $hash_base);
7182         }
7183         print "<div class=\"page_body\">\n";
7184         print "<table class=\"tree\">\n";
7185         my $alternate = 1;
7186         # '..' (top directory) link if possible
7187         if (defined $hash_base &&
7188             defined $file_name && $file_name =~ m![^/]+$!) {
7189                 if ($alternate) {
7190                         print "<tr class=\"dark\">\n";
7191                 } else {
7192                         print "<tr class=\"light\">\n";
7193                 }
7194                 $alternate ^= 1;
7195
7196                 my $up = $file_name;
7197                 $up =~ s!/?[^/]+$!!;
7198                 undef $up unless $up;
7199                 # based on git_print_tree_entry
7200                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7201                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7202                 print '<td class="list">';
7203                 print $cgi->a({-href => href(action=>"tree",
7204                                              hash_base=>$hash_base,
7205                                              file_name=>$up)},
7206                               "..");
7207                 print "</td>\n";
7208                 print "<td class=\"link\"></td>\n";
7209
7210                 print "</tr>\n";
7211         }
7212         foreach my $line (@entries) {
7213                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7214
7215                 if ($alternate) {
7216                         print "<tr class=\"dark\">\n";
7217                 } else {
7218                         print "<tr class=\"light\">\n";
7219                 }
7220                 $alternate ^= 1;
7221
7222                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7223
7224                 print "</tr>\n";
7225         }
7226         print "</table>\n" .
7227               "</div>";
7228         git_footer_html();
7229 }
7230
7231 sub snapshot_name {
7232         my ($project, $hash) = @_;
7233
7234         # path/to/project.git  -> project
7235         # path/to/project/.git -> project
7236         my $name = to_utf8($project);
7237         $name =~ s,([^/])/*\.git$,$1,;
7238         $name = basename($name);
7239         # sanitize name
7240         $name =~ s/[[:cntrl:]]/?/g;
7241
7242         my $ver = $hash;
7243         if ($hash =~ /^[0-9a-fA-F]+$/) {
7244                 # shorten SHA-1 hash
7245                 my $full_hash = git_get_full_hash($project, $hash);
7246                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7247                         $ver = git_get_short_hash($project, $hash);
7248                 }
7249         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7250                 # tags don't need shortened SHA-1 hash
7251                 $ver = $1;
7252         } else {
7253                 # branches and other need shortened SHA-1 hash
7254                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7255                         $ver = $1;
7256                 }
7257                 $ver .= '-' . git_get_short_hash($project, $hash);
7258         }
7259         # in case of hierarchical branch names
7260         $ver =~ s!/!.!g;
7261
7262         # name = project-version_string
7263         $name = "$name-$ver";
7264
7265         return wantarray ? ($name, $name) : $name;
7266 }
7267
7268 sub exit_if_unmodified_since {
7269         my ($latest_epoch) = @_;
7270         our $cgi;
7271
7272         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7273         if (defined $if_modified) {
7274                 my $since;
7275                 if (eval { require HTTP::Date; 1; }) {
7276                         $since = HTTP::Date::str2time($if_modified);
7277                 } elsif (eval { require Time::ParseDate; 1; }) {
7278                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7279                 }
7280                 if (defined $since && $latest_epoch <= $since) {
7281                         my %latest_date = parse_date($latest_epoch);
7282                         print $cgi->header(
7283                                 -last_modified => $latest_date{'rfc2822'},
7284                                 -status => '304 Not Modified');
7285                         goto DONE_GITWEB;
7286                 }
7287         }
7288 }
7289
7290 sub git_snapshot {
7291         my $format = $input_params{'snapshot_format'};
7292         if (!@snapshot_fmts) {
7293                 die_error(403, "Snapshots not allowed");
7294         }
7295         # default to first supported snapshot format
7296         $format ||= $snapshot_fmts[0];
7297         if ($format !~ m/^[a-z0-9]+$/) {
7298                 die_error(400, "Invalid snapshot format parameter");
7299         } elsif (!exists($known_snapshot_formats{$format})) {
7300                 die_error(400, "Unknown snapshot format");
7301         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7302                 die_error(403, "Snapshot format not allowed");
7303         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7304                 die_error(403, "Unsupported snapshot format");
7305         }
7306
7307         my $type = git_get_type("$hash^{}");
7308         if (!$type) {
7309                 die_error(404, 'Object does not exist');
7310         }  elsif ($type eq 'blob') {
7311                 die_error(400, 'Object is not a tree-ish');
7312         }
7313
7314         my ($name, $prefix) = snapshot_name($project, $hash);
7315         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7316
7317         my %co = parse_commit($hash);
7318         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7319
7320         my $cmd = quote_command(
7321                 git_cmd(), 'archive',
7322                 "--format=$known_snapshot_formats{$format}{'format'}",
7323                 "--prefix=$prefix/", $hash);
7324         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7325                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7326         }
7327
7328         $filename =~ s/(["\\])/\\$1/g;
7329         my %latest_date;
7330         if (%co) {
7331                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7332         }
7333
7334         print $cgi->header(
7335                 -type => $known_snapshot_formats{$format}{'type'},
7336                 -content_disposition => 'inline; filename="' . $filename . '"',
7337                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7338                 -status => '200 OK');
7339
7340         open my $fd, "-|", $cmd
7341                 or die_error(500, "Execute git-archive failed");
7342         binmode STDOUT, ':raw';
7343         print <$fd>;
7344         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7345         close $fd;
7346 }
7347
7348 sub git_log_generic {
7349         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7350
7351         my $head = git_get_head_hash($project);
7352         if (!defined $base) {
7353                 $base = $head;
7354         }
7355         if (!defined $page) {
7356                 $page = 0;
7357         }
7358         my $refs = git_get_references();
7359
7360         my $commit_hash = $base;
7361         if (defined $parent) {
7362                 $commit_hash = "$parent..$base";
7363         }
7364         my @commitlist =
7365                 parse_commits($commit_hash, 101, (100 * $page),
7366                               defined $file_name ? ($file_name, "--full-history") : ());
7367
7368         my $ftype;
7369         if (!defined $file_hash && defined $file_name) {
7370                 # some commits could have deleted file in question,
7371                 # and not have it in tree, but one of them has to have it
7372                 for (my $i = 0; $i < @commitlist; $i++) {
7373                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7374                         last if defined $file_hash;
7375                 }
7376         }
7377         if (defined $file_hash) {
7378                 $ftype = git_get_type($file_hash);
7379         }
7380         if (defined $file_name && !defined $ftype) {
7381                 die_error(500, "Unknown type of object");
7382         }
7383         my %co;
7384         if (defined $file_name) {
7385                 %co = parse_commit($base)
7386                         or die_error(404, "Unknown commit object");
7387         }
7388
7389
7390         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7391         my $next_link = '';
7392         if ($#commitlist >= 100) {
7393                 $next_link =
7394                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7395                                  -accesskey => "n", -title => "Alt-n"}, "next");
7396         }
7397         my $patch_max = gitweb_get_feature('patches');
7398         if ($patch_max && !defined $file_name) {
7399                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7400                         $paging_nav .= " &sdot; " .
7401                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7402                                         "patches");
7403                 }
7404         }
7405
7406         git_header_html();
7407         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7408         if (defined $file_name) {
7409                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7410         } else {
7411                 git_print_header_div('summary', $project)
7412         }
7413         git_print_page_path($file_name, $ftype, $hash_base)
7414                 if (defined $file_name);
7415
7416         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7417                      $file_name, $file_hash, $ftype);
7418
7419         git_footer_html();
7420 }
7421
7422 sub git_log {
7423         git_log_generic('log', \&git_log_body,
7424                         $hash, $hash_parent);
7425 }
7426
7427 sub git_commit {
7428         $hash ||= $hash_base || "HEAD";
7429         my %co = parse_commit($hash)
7430             or die_error(404, "Unknown commit object");
7431
7432         my $parent  = $co{'parent'};
7433         my $parents = $co{'parents'}; # listref
7434
7435         # we need to prepare $formats_nav before any parameter munging
7436         my $formats_nav;
7437         if (!defined $parent) {
7438                 # --root commitdiff
7439                 $formats_nav .= '(initial)';
7440         } elsif (@$parents == 1) {
7441                 # single parent commit
7442                 $formats_nav .=
7443                         '(parent: ' .
7444                         $cgi->a({-href => href(action=>"commit",
7445                                                hash=>$parent)},
7446                                 esc_html(substr($parent, 0, 7))) .
7447                         ')';
7448         } else {
7449                 # merge commit
7450                 $formats_nav .=
7451                         '(merge: ' .
7452                         join(' ', map {
7453                                 $cgi->a({-href => href(action=>"commit",
7454                                                        hash=>$_)},
7455                                         esc_html(substr($_, 0, 7)));
7456                         } @$parents ) .
7457                         ')';
7458         }
7459         if (gitweb_check_feature('patches') && @$parents <= 1) {
7460                 $formats_nav .= " | " .
7461                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7462                                 "patch");
7463         }
7464
7465         if (!defined $parent) {
7466                 $parent = "--root";
7467         }
7468         my @difftree;
7469         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7470                 @diff_opts,
7471                 (@$parents <= 1 ? $parent : '-c'),
7472                 $hash, "--"
7473                 or die_error(500, "Open git-diff-tree failed");
7474         @difftree = map { chomp; $_ } <$fd>;
7475         close $fd or die_error(404, "Reading git-diff-tree failed");
7476
7477         # non-textual hash id's can be cached
7478         my $expires;
7479         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7480                 $expires = "+1d";
7481         }
7482         my $refs = git_get_references();
7483         my $ref = format_ref_marker($refs, $co{'id'});
7484
7485         git_header_html(undef, $expires);
7486         git_print_page_nav('commit', '',
7487                            $hash, $co{'tree'}, $hash,
7488                            $formats_nav);
7489
7490         if (defined $co{'parent'}) {
7491                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7492         } else {
7493                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7494         }
7495         print "<div class=\"title_text\">\n" .
7496               "<table class=\"object_header\">\n";
7497         git_print_authorship_rows(\%co);
7498         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7499         print "<tr>" .
7500               "<td>tree</td>" .
7501               "<td class=\"sha1\">" .
7502               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7503                        class => "list"}, $co{'tree'}) .
7504               "</td>" .
7505               "<td class=\"link\">" .
7506               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7507                       "tree");
7508         my $snapshot_links = format_snapshot_links($hash);
7509         if (defined $snapshot_links) {
7510                 print " | " . $snapshot_links;
7511         }
7512         print "</td>" .
7513               "</tr>\n";
7514
7515         foreach my $par (@$parents) {
7516                 print "<tr>" .
7517                       "<td>parent</td>" .
7518                       "<td class=\"sha1\">" .
7519                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7520                                class => "list"}, $par) .
7521                       "</td>" .
7522                       "<td class=\"link\">" .
7523                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7524                       " | " .
7525                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7526                       "</td>" .
7527                       "</tr>\n";
7528         }
7529         print "</table>".
7530               "</div>\n";
7531
7532         print "<div class=\"page_body\">\n";
7533         git_print_log($co{'comment'});
7534         print "</div>\n";
7535
7536         git_difftree_body(\@difftree, $hash, @$parents);
7537
7538         git_footer_html();
7539 }
7540
7541 sub git_object {
7542         # object is defined by:
7543         # - hash or hash_base alone
7544         # - hash_base and file_name
7545         my $type;
7546
7547         # - hash or hash_base alone
7548         if ($hash || ($hash_base && !defined $file_name)) {
7549                 my $object_id = $hash || $hash_base;
7550
7551                 open my $fd, "-|", quote_command(
7552                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7553                         or die_error(404, "Object does not exist");
7554                 $type = <$fd>;
7555                 chomp $type;
7556                 close $fd
7557                         or die_error(404, "Object does not exist");
7558
7559         # - hash_base and file_name
7560         } elsif ($hash_base && defined $file_name) {
7561                 $file_name =~ s,/+$,,;
7562
7563                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7564                         or die_error(404, "Base object does not exist");
7565
7566                 # here errors should not hapen
7567                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7568                         or die_error(500, "Open git-ls-tree failed");
7569                 my $line = <$fd>;
7570                 close $fd;
7571
7572                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7573                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7574                         die_error(404, "File or directory for given base does not exist");
7575                 }
7576                 $type = $2;
7577                 $hash = $3;
7578         } else {
7579                 die_error(400, "Not enough information to find object");
7580         }
7581
7582         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7583                                           hash=>$hash, hash_base=>$hash_base,
7584                                           file_name=>$file_name),
7585                              -status => '302 Found');
7586 }
7587
7588 sub git_blobdiff {
7589         my $format = shift || 'html';
7590         my $diff_style = $input_params{'diff_style'} || 'inline';
7591
7592         my $fd;
7593         my @difftree;
7594         my %diffinfo;
7595         my $expires;
7596
7597         # preparing $fd and %diffinfo for git_patchset_body
7598         # new style URI
7599         if (defined $hash_base && defined $hash_parent_base) {
7600                 if (defined $file_name) {
7601                         # read raw output
7602                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7603                                 $hash_parent_base, $hash_base,
7604                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7605                                 or die_error(500, "Open git-diff-tree failed");
7606                         @difftree = map { chomp; $_ } <$fd>;
7607                         close $fd
7608                                 or die_error(404, "Reading git-diff-tree failed");
7609                         @difftree
7610                                 or die_error(404, "Blob diff not found");
7611
7612                 } elsif (defined $hash &&
7613                          $hash =~ /[0-9a-fA-F]{40}/) {
7614                         # try to find filename from $hash
7615
7616                         # read filtered raw output
7617                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7618                                 $hash_parent_base, $hash_base, "--"
7619                                 or die_error(500, "Open git-diff-tree failed");
7620                         @difftree =
7621                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7622                                 # $hash == to_id
7623                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7624                                 map { chomp; $_ } <$fd>;
7625                         close $fd
7626                                 or die_error(404, "Reading git-diff-tree failed");
7627                         @difftree
7628                                 or die_error(404, "Blob diff not found");
7629
7630                 } else {
7631                         die_error(400, "Missing one of the blob diff parameters");
7632                 }
7633
7634                 if (@difftree > 1) {
7635                         die_error(400, "Ambiguous blob diff specification");
7636                 }
7637
7638                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7639                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7640                 $file_name   ||= $diffinfo{'to_file'};
7641
7642                 $hash_parent ||= $diffinfo{'from_id'};
7643                 $hash        ||= $diffinfo{'to_id'};
7644
7645                 # non-textual hash id's can be cached
7646                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7647                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7648                         $expires = '+1d';
7649                 }
7650
7651                 # open patch output
7652                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7653                         '-p', ($format eq 'html' ? "--full-index" : ()),
7654                         $hash_parent_base, $hash_base,
7655                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7656                         or die_error(500, "Open git-diff-tree failed");
7657         }
7658
7659         # old/legacy style URI -- not generated anymore since 1.4.3.
7660         if (!%diffinfo) {
7661                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7662         }
7663
7664         # header
7665         if ($format eq 'html') {
7666                 my $formats_nav =
7667                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7668                                 "raw");
7669                 $formats_nav .= diff_style_nav($diff_style);
7670                 git_header_html(undef, $expires);
7671                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7672                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7673                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7674                 } else {
7675                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7676                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7677                 }
7678                 if (defined $file_name) {
7679                         git_print_page_path($file_name, "blob", $hash_base);
7680                 } else {
7681                         print "<div class=\"page_path\"></div>\n";
7682                 }
7683
7684         } elsif ($format eq 'plain') {
7685                 print $cgi->header(
7686                         -type => 'text/plain',
7687                         -charset => 'utf-8',
7688                         -expires => $expires,
7689                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7690
7691                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7692
7693         } else {
7694                 die_error(400, "Unknown blobdiff format");
7695         }
7696
7697         # patch
7698         if ($format eq 'html') {
7699                 print "<div class=\"page_body\">\n";
7700
7701                 git_patchset_body($fd, $diff_style,
7702                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7703                 close $fd;
7704
7705                 print "</div>\n"; # class="page_body"
7706                 git_footer_html();
7707
7708         } else {
7709                 while (my $line = <$fd>) {
7710                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7711                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7712
7713                         print $line;
7714
7715                         last if $line =~ m!^\+\+\+!;
7716                 }
7717                 local $/ = undef;
7718                 print <$fd>;
7719                 close $fd;
7720         }
7721 }
7722
7723 sub git_blobdiff_plain {
7724         git_blobdiff('plain');
7725 }
7726
7727 # assumes that it is added as later part of already existing navigation,
7728 # so it returns "| foo | bar" rather than just "foo | bar"
7729 sub diff_style_nav {
7730         my ($diff_style, $is_combined) = @_;
7731         $diff_style ||= 'inline';
7732
7733         return "" if ($is_combined);
7734
7735         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7736         my %styles = @styles;
7737         @styles =
7738                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7739
7740         return join '',
7741                 map { " | ".$_ }
7742                 map {
7743                         $_ eq $diff_style ? $styles{$_} :
7744                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7745                 } @styles;
7746 }
7747
7748 sub git_commitdiff {
7749         my %params = @_;
7750         my $format = $params{-format} || 'html';
7751         my $diff_style = $input_params{'diff_style'} || 'inline';
7752
7753         my ($patch_max) = gitweb_get_feature('patches');
7754         if ($format eq 'patch') {
7755                 die_error(403, "Patch view not allowed") unless $patch_max;
7756         }
7757
7758         $hash ||= $hash_base || "HEAD";
7759         my %co = parse_commit($hash)
7760             or die_error(404, "Unknown commit object");
7761
7762         # choose format for commitdiff for merge
7763         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7764                 $hash_parent = '--cc';
7765         }
7766         # we need to prepare $formats_nav before almost any parameter munging
7767         my $formats_nav;
7768         if ($format eq 'html') {
7769                 $formats_nav =
7770                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7771                                 "raw");
7772                 if ($patch_max && @{$co{'parents'}} <= 1) {
7773                         $formats_nav .= " | " .
7774                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7775                                         "patch");
7776                 }
7777                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7778
7779                 if (defined $hash_parent &&
7780                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7781                         # commitdiff with two commits given
7782                         my $hash_parent_short = $hash_parent;
7783                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7784                                 $hash_parent_short = substr($hash_parent, 0, 7);
7785                         }
7786                         $formats_nav .=
7787                                 ' (from';
7788                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7789                                 if ($co{'parents'}[$i] eq $hash_parent) {
7790                                         $formats_nav .= ' parent ' . ($i+1);
7791                                         last;
7792                                 }
7793                         }
7794                         $formats_nav .= ': ' .
7795                                 $cgi->a({-href => href(-replay=>1,
7796                                                        hash=>$hash_parent, hash_base=>undef)},
7797                                         esc_html($hash_parent_short)) .
7798                                 ')';
7799                 } elsif (!$co{'parent'}) {
7800                         # --root commitdiff
7801                         $formats_nav .= ' (initial)';
7802                 } elsif (scalar @{$co{'parents'}} == 1) {
7803                         # single parent commit
7804                         $formats_nav .=
7805                                 ' (parent: ' .
7806                                 $cgi->a({-href => href(-replay=>1,
7807                                                        hash=>$co{'parent'}, hash_base=>undef)},
7808                                         esc_html(substr($co{'parent'}, 0, 7))) .
7809                                 ')';
7810                 } else {
7811                         # merge commit
7812                         if ($hash_parent eq '--cc') {
7813                                 $formats_nav .= ' | ' .
7814                                         $cgi->a({-href => href(-replay=>1,
7815                                                                hash=>$hash, hash_parent=>'-c')},
7816                                                 'combined');
7817                         } else { # $hash_parent eq '-c'
7818                                 $formats_nav .= ' | ' .
7819                                         $cgi->a({-href => href(-replay=>1,
7820                                                                hash=>$hash, hash_parent=>'--cc')},
7821                                                 'compact');
7822                         }
7823                         $formats_nav .=
7824                                 ' (merge: ' .
7825                                 join(' ', map {
7826                                         $cgi->a({-href => href(-replay=>1,
7827                                                                hash=>$_, hash_base=>undef)},
7828                                                 esc_html(substr($_, 0, 7)));
7829                                 } @{$co{'parents'}} ) .
7830                                 ')';
7831                 }
7832         }
7833
7834         my $hash_parent_param = $hash_parent;
7835         if (!defined $hash_parent_param) {
7836                 # --cc for multiple parents, --root for parentless
7837                 $hash_parent_param =
7838                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7839         }
7840
7841         # read commitdiff
7842         my $fd;
7843         my @difftree;
7844         if ($format eq 'html') {
7845                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7846                         "--no-commit-id", "--patch-with-raw", "--full-index",
7847                         $hash_parent_param, $hash, "--"
7848                         or die_error(500, "Open git-diff-tree failed");
7849
7850                 while (my $line = <$fd>) {
7851                         chomp $line;
7852                         # empty line ends raw part of diff-tree output
7853                         last unless $line;
7854                         push @difftree, scalar parse_difftree_raw_line($line);
7855                 }
7856
7857         } elsif ($format eq 'plain') {
7858                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7859                         '-p', $hash_parent_param, $hash, "--"
7860                         or die_error(500, "Open git-diff-tree failed");
7861         } elsif ($format eq 'patch') {
7862                 # For commit ranges, we limit the output to the number of
7863                 # patches specified in the 'patches' feature.
7864                 # For single commits, we limit the output to a single patch,
7865                 # diverging from the git-format-patch default.
7866                 my @commit_spec = ();
7867                 if ($hash_parent) {
7868                         if ($patch_max > 0) {
7869                                 push @commit_spec, "-$patch_max";
7870                         }
7871                         push @commit_spec, '-n', "$hash_parent..$hash";
7872                 } else {
7873                         if ($params{-single}) {
7874                                 push @commit_spec, '-1';
7875                         } else {
7876                                 if ($patch_max > 0) {
7877                                         push @commit_spec, "-$patch_max";
7878                                 }
7879                                 push @commit_spec, "-n";
7880                         }
7881                         push @commit_spec, '--root', $hash;
7882                 }
7883                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7884                         '--encoding=utf8', '--stdout', @commit_spec
7885                         or die_error(500, "Open git-format-patch failed");
7886         } else {
7887                 die_error(400, "Unknown commitdiff format");
7888         }
7889
7890         # non-textual hash id's can be cached
7891         my $expires;
7892         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7893                 $expires = "+1d";
7894         }
7895
7896         # write commit message
7897         if ($format eq 'html') {
7898                 my $refs = git_get_references();
7899                 my $ref = format_ref_marker($refs, $co{'id'});
7900
7901                 git_header_html(undef, $expires);
7902                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7903                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7904                 print "<div class=\"title_text\">\n" .
7905                       "<table class=\"object_header\">\n";
7906                 git_print_authorship_rows(\%co);
7907                 print "</table>".
7908                       "</div>\n";
7909                 print "<div class=\"page_body\">\n";
7910                 if (@{$co{'comment'}} > 1) {
7911                         print "<div class=\"log\">\n";
7912                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7913                         print "</div>\n"; # class="log"
7914                 }
7915
7916         } elsif ($format eq 'plain') {
7917                 my $refs = git_get_references("tags");
7918                 my $tagname = git_get_rev_name_tags($hash);
7919                 my $filename = basename($project) . "-$hash.patch";
7920
7921                 print $cgi->header(
7922                         -type => 'text/plain',
7923                         -charset => 'utf-8',
7924                         -expires => $expires,
7925                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7926                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7927                 print "From: " . to_utf8($co{'author'}) . "\n";
7928                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7929                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7930
7931                 print "X-Git-Tag: $tagname\n" if $tagname;
7932                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7933
7934                 foreach my $line (@{$co{'comment'}}) {
7935                         print to_utf8($line) . "\n";
7936                 }
7937                 print "---\n\n";
7938         } elsif ($format eq 'patch') {
7939                 my $filename = basename($project) . "-$hash.patch";
7940
7941                 print $cgi->header(
7942                         -type => 'text/plain',
7943                         -charset => 'utf-8',
7944                         -expires => $expires,
7945                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7946         }
7947
7948         # write patch
7949         if ($format eq 'html') {
7950                 my $use_parents = !defined $hash_parent ||
7951                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7952                 git_difftree_body(\@difftree, $hash,
7953                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7954                 print "<br/>\n";
7955
7956                 git_patchset_body($fd, $diff_style,
7957                                   \@difftree, $hash,
7958                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7959                 close $fd;
7960                 print "</div>\n"; # class="page_body"
7961                 git_footer_html();
7962
7963         } elsif ($format eq 'plain') {
7964                 local $/ = undef;
7965                 print <$fd>;
7966                 close $fd
7967                         or print "Reading git-diff-tree failed\n";
7968         } elsif ($format eq 'patch') {
7969                 local $/ = undef;
7970                 print <$fd>;
7971                 close $fd
7972                         or print "Reading git-format-patch failed\n";
7973         }
7974 }
7975
7976 sub git_commitdiff_plain {
7977         git_commitdiff(-format => 'plain');
7978 }
7979
7980 # format-patch-style patches
7981 sub git_patch {
7982         git_commitdiff(-format => 'patch', -single => 1);
7983 }
7984
7985 sub git_patches {
7986         git_commitdiff(-format => 'patch');
7987 }
7988
7989 sub git_history {
7990         git_log_generic('history', \&git_history_body,
7991                         $hash_base, $hash_parent_base,
7992                         $file_name, $hash);
7993 }
7994
7995 sub git_search {
7996         $searchtype ||= 'commit';
7997
7998         # check if appropriate features are enabled
7999         gitweb_check_feature('search')
8000                 or die_error(403, "Search is disabled");
8001         if ($searchtype eq 'pickaxe') {
8002                 # pickaxe may take all resources of your box and run for several minutes
8003                 # with every query - so decide by yourself how public you make this feature
8004                 gitweb_check_feature('pickaxe')
8005                         or die_error(403, "Pickaxe search is disabled");
8006         }
8007         if ($searchtype eq 'grep') {
8008                 # grep search might be potentially CPU-intensive, too
8009                 gitweb_check_feature('grep')
8010                         or die_error(403, "Grep search is disabled");
8011         }
8012
8013         if (!defined $searchtext) {
8014                 die_error(400, "Text field is empty");
8015         }
8016         if (!defined $hash) {
8017                 $hash = git_get_head_hash($project);
8018         }
8019         my %co = parse_commit($hash);
8020         if (!%co) {
8021                 die_error(404, "Unknown commit object");
8022         }
8023         if (!defined $page) {
8024                 $page = 0;
8025         }
8026
8027         if ($searchtype eq 'commit' ||
8028             $searchtype eq 'author' ||
8029             $searchtype eq 'committer') {
8030                 git_search_message(%co);
8031         } elsif ($searchtype eq 'pickaxe') {
8032                 git_search_changes(%co);
8033         } elsif ($searchtype eq 'grep') {
8034                 git_search_files(%co);
8035         } else {
8036                 die_error(400, "Unknown search type");
8037         }
8038 }
8039
8040 sub git_search_help {
8041         git_header_html();
8042         git_print_page_nav('','', $hash,$hash,$hash);
8043         print <<EOT;
8044 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8045 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8046 the pattern entered is recognized as the POSIX extended
8047 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8048 insensitive).</p>
8049 <dl>
8050 <dt><b>commit</b></dt>
8051 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8052 EOT
8053         my $have_grep = gitweb_check_feature('grep');
8054         if ($have_grep) {
8055                 print <<EOT;
8056 <dt><b>grep</b></dt>
8057 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8058     a different one) are searched for the given pattern. On large trees, this search can take
8059 a while and put some strain on the server, so please use it with some consideration. Note that
8060 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8061 case-sensitive.</dd>
8062 EOT
8063         }
8064         print <<EOT;
8065 <dt><b>author</b></dt>
8066 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8067 <dt><b>committer</b></dt>
8068 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8069 EOT
8070         my $have_pickaxe = gitweb_check_feature('pickaxe');
8071         if ($have_pickaxe) {
8072                 print <<EOT;
8073 <dt><b>pickaxe</b></dt>
8074 <dd>All commits that caused the string to appear or disappear from any file (changes that
8075 added, removed or "modified" the string) will be listed. This search can take a while and
8076 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8077 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8078 EOT
8079         }
8080         print "</dl>\n";
8081         git_footer_html();
8082 }
8083
8084 sub git_shortlog {
8085         git_log_generic('shortlog', \&git_shortlog_body,
8086                         $hash, $hash_parent);
8087 }
8088
8089 ## ......................................................................
8090 ## feeds (RSS, Atom; OPML)
8091
8092 sub git_feed {
8093         my $format = shift || 'atom';
8094         my $have_blame = gitweb_check_feature('blame');
8095
8096         # Atom: http://www.atomenabled.org/developers/syndication/
8097         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8098         if ($format ne 'rss' && $format ne 'atom') {
8099                 die_error(400, "Unknown web feed format");
8100         }
8101
8102         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8103         my $head = $hash || 'HEAD';
8104         my @commitlist = parse_commits($head, 150, 0, $file_name);
8105
8106         my %latest_commit;
8107         my %latest_date;
8108         my $content_type = "application/$format+xml";
8109         if (defined $cgi->http('HTTP_ACCEPT') &&
8110                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8111                 # browser (feed reader) prefers text/xml
8112                 $content_type = 'text/xml';
8113         }
8114         if (defined($commitlist[0])) {
8115                 %latest_commit = %{$commitlist[0]};
8116                 my $latest_epoch = $latest_commit{'committer_epoch'};
8117                 exit_if_unmodified_since($latest_epoch);
8118                 %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8119         }
8120         print $cgi->header(
8121                 -type => $content_type,
8122                 -charset => 'utf-8',
8123                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8124                 -status => '200 OK');
8125
8126         # Optimization: skip generating the body if client asks only
8127         # for Last-Modified date.
8128         return if ($cgi->request_method() eq 'HEAD');
8129
8130         # header variables
8131         my $title = "$site_name - $project/$action";
8132         my $feed_type = 'log';
8133         if (defined $hash) {
8134                 $title .= " - '$hash'";
8135                 $feed_type = 'branch log';
8136                 if (defined $file_name) {
8137                         $title .= " :: $file_name";
8138                         $feed_type = 'history';
8139                 }
8140         } elsif (defined $file_name) {
8141                 $title .= " - $file_name";
8142                 $feed_type = 'history';
8143         }
8144         $title .= " $feed_type";
8145         my $descr = git_get_project_description($project);
8146         if (defined $descr) {
8147                 $descr = esc_html($descr);
8148         } else {
8149                 $descr = "$project " .
8150                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8151                          " feed";
8152         }
8153         my $owner = git_get_project_owner($project);
8154         $owner = esc_html($owner);
8155
8156         #header
8157         my $alt_url;
8158         if (defined $file_name) {
8159                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8160         } elsif (defined $hash) {
8161                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8162         } else {
8163                 $alt_url = href(-full=>1, action=>"summary");
8164         }
8165         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8166         if ($format eq 'rss') {
8167                 print <<XML;
8168 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8169 <channel>
8170 XML
8171                 print "<title>$title</title>\n" .
8172                       "<link>$alt_url</link>\n" .
8173                       "<description>$descr</description>\n" .
8174                       "<language>en</language>\n" .
8175                       # project owner is responsible for 'editorial' content
8176                       "<managingEditor>$owner</managingEditor>\n";
8177                 if (defined $logo || defined $favicon) {
8178                         # prefer the logo to the favicon, since RSS
8179                         # doesn't allow both
8180                         my $img = esc_url($logo || $favicon);
8181                         print "<image>\n" .
8182                               "<url>$img</url>\n" .
8183                               "<title>$title</title>\n" .
8184                               "<link>$alt_url</link>\n" .
8185                               "</image>\n";
8186                 }
8187                 if (%latest_date) {
8188                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8189                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8190                 }
8191                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8192         } elsif ($format eq 'atom') {
8193                 print <<XML;
8194 <feed xmlns="http://www.w3.org/2005/Atom">
8195 XML
8196                 print "<title>$title</title>\n" .
8197                       "<subtitle>$descr</subtitle>\n" .
8198                       '<link rel="alternate" type="text/html" href="' .
8199                       $alt_url . '" />' . "\n" .
8200                       '<link rel="self" type="' . $content_type . '" href="' .
8201                       $cgi->self_url() . '" />' . "\n" .
8202                       "<id>" . href(-full=>1) . "</id>\n" .
8203                       # use project owner for feed author
8204                       "<author><name>$owner</name></author>\n";
8205                 if (defined $favicon) {
8206                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8207                 }
8208                 if (defined $logo) {
8209                         # not twice as wide as tall: 72 x 27 pixels
8210                         print "<logo>" . esc_url($logo) . "</logo>\n";
8211                 }
8212                 if (! %latest_date) {
8213                         # dummy date to keep the feed valid until commits trickle in:
8214                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8215                 } else {
8216                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8217                 }
8218                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8219         }
8220
8221         # contents
8222         for (my $i = 0; $i <= $#commitlist; $i++) {
8223                 my %co = %{$commitlist[$i]};
8224                 my $commit = $co{'id'};
8225                 # we read 150, we always show 30 and the ones more recent than 48 hours
8226                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8227                         last;
8228                 }
8229                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8230
8231                 # get list of changed files
8232                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8233                         $co{'parent'} || "--root",
8234                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8235                         or next;
8236                 my @difftree = map { chomp; $_ } <$fd>;
8237                 close $fd
8238                         or next;
8239
8240                 # print element (entry, item)
8241                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8242                 if ($format eq 'rss') {
8243                         print "<item>\n" .
8244                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8245                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8246                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8247                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8248                               "<link>$co_url</link>\n" .
8249                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8250                               "<content:encoded>" .
8251                               "<![CDATA[\n";
8252                 } elsif ($format eq 'atom') {
8253                         print "<entry>\n" .
8254                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8255                               "<updated>$cd{'iso-8601'}</updated>\n" .
8256                               "<author>\n" .
8257                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8258                         if ($co{'author_email'}) {
8259                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8260                         }
8261                         print "</author>\n" .
8262                               # use committer for contributor
8263                               "<contributor>\n" .
8264                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8265                         if ($co{'committer_email'}) {
8266                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8267                         }
8268                         print "</contributor>\n" .
8269                               "<published>$cd{'iso-8601'}</published>\n" .
8270                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8271                               "<id>$co_url</id>\n" .
8272                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8273                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8274                 }
8275                 my $comment = $co{'comment'};
8276                 print "<pre>\n";
8277                 foreach my $line (@$comment) {
8278                         $line = esc_html($line);
8279                         print "$line\n";
8280                 }
8281                 print "</pre><ul>\n";
8282                 foreach my $difftree_line (@difftree) {
8283                         my %difftree = parse_difftree_raw_line($difftree_line);
8284                         next if !$difftree{'from_id'};
8285
8286                         my $file = $difftree{'file'} || $difftree{'to_file'};
8287
8288                         print "<li>" .
8289                               "[" .
8290                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8291                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8292                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8293                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8294                                       -title => "diff"}, 'D');
8295                         if ($have_blame) {
8296                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8297                                                              file_name=>$file, hash_base=>$commit),
8298                                               -title => "blame"}, 'B');
8299                         }
8300                         # if this is not a feed of a file history
8301                         if (!defined $file_name || $file_name ne $file) {
8302                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8303                                                              file_name=>$file, hash=>$commit),
8304                                               -title => "history"}, 'H');
8305                         }
8306                         $file = esc_path($file);
8307                         print "] ".
8308                               "$file</li>\n";
8309                 }
8310                 if ($format eq 'rss') {
8311                         print "</ul>]]>\n" .
8312                               "</content:encoded>\n" .
8313                               "</item>\n";
8314                 } elsif ($format eq 'atom') {
8315                         print "</ul>\n</div>\n" .
8316                               "</content>\n" .
8317                               "</entry>\n";
8318                 }
8319         }
8320
8321         # end of feed
8322         if ($format eq 'rss') {
8323                 print "</channel>\n</rss>\n";
8324         } elsif ($format eq 'atom') {
8325                 print "</feed>\n";
8326         }
8327 }
8328
8329 sub git_rss {
8330         git_feed('rss');
8331 }
8332
8333 sub git_atom {
8334         git_feed('atom');
8335 }
8336
8337 sub git_opml {
8338         my @list = git_get_projects_list($project_filter, $strict_export);
8339         if (!@list) {
8340                 die_error(404, "No projects found");
8341         }
8342
8343         print $cgi->header(
8344                 -type => 'text/xml',
8345                 -charset => 'utf-8',
8346                 -content_disposition => 'inline; filename="opml.xml"');
8347
8348         my $title = esc_html($site_name);
8349         my $filter = " within subdirectory ";
8350         if (defined $project_filter) {
8351                 $filter .= esc_html($project_filter);
8352         } else {
8353                 $filter = "";
8354         }
8355         print <<XML;
8356 <?xml version="1.0" encoding="utf-8"?>
8357 <opml version="1.0">
8358 <head>
8359   <title>$title OPML Export$filter</title>
8360 </head>
8361 <body>
8362 <outline text="git RSS feeds">
8363 XML
8364
8365         foreach my $pr (@list) {
8366                 my %proj = %$pr;
8367                 my $head = git_get_head_hash($proj{'path'});
8368                 if (!defined $head) {
8369                         next;
8370                 }
8371                 $git_dir = "$projectroot/$proj{'path'}";
8372                 my %co = parse_commit($head);
8373                 if (!%co) {
8374                         next;
8375                 }
8376
8377                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8378                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8379                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8380                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8381         }
8382         print <<XML;
8383 </outline>
8384 </body>
8385 </opml>
8386 XML
8387 }