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                 } elsif (defined $type && $type eq 'tree') {
4467                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4468                                                      hash_base=>$hb),
4469                                       -title => $name}, esc_path($basename));
4470                         print " / ";
4471                 } else {
4472                         print esc_path($basename);
4473                 }
4474         }
4475         print "<br/></div>\n";
4476 }
4477
4478 sub git_print_log {
4479         my $log = shift;
4480         my %opts = @_;
4481
4482         if ($opts{'-remove_title'}) {
4483                 # remove title, i.e. first line of log
4484                 shift @$log;
4485         }
4486         # remove leading empty lines
4487         while (defined $log->[0] && $log->[0] eq "") {
4488                 shift @$log;
4489         }
4490
4491         # print log
4492         my $skip_blank_line = 0;
4493         foreach my $line (@$log) {
4494                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4495                         if (! $opts{'-remove_signoff'}) {
4496                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4497                                 $skip_blank_line = 1;
4498                         }
4499                         next;
4500                 }
4501
4502                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4503                         if (! $opts{'-remove_signoff'}) {
4504                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4505                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4506                                         "</span><br/>\n";
4507                                 $skip_blank_line = 1;
4508                         }
4509                         next;
4510                 }
4511
4512                 # print only one empty line
4513                 # do not print empty line after signoff
4514                 if ($line eq "") {
4515                         next if ($skip_blank_line);
4516                         $skip_blank_line = 1;
4517                 } else {
4518                         $skip_blank_line = 0;
4519                 }
4520
4521                 print format_log_line_html($line) . "<br/>\n";
4522         }
4523
4524         if ($opts{'-final_empty_line'}) {
4525                 # end with single empty line
4526                 print "<br/>\n" unless $skip_blank_line;
4527         }
4528 }
4529
4530 # return link target (what link points to)
4531 sub git_get_link_target {
4532         my $hash = shift;
4533         my $link_target;
4534
4535         # read link
4536         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4537                 or return;
4538         {
4539                 local $/ = undef;
4540                 $link_target = <$fd>;
4541         }
4542         close $fd
4543                 or return;
4544
4545         return $link_target;
4546 }
4547
4548 # given link target, and the directory (basedir) the link is in,
4549 # return target of link relative to top directory (top tree);
4550 # return undef if it is not possible (including absolute links).
4551 sub normalize_link_target {
4552         my ($link_target, $basedir) = @_;
4553
4554         # absolute symlinks (beginning with '/') cannot be normalized
4555         return if (substr($link_target, 0, 1) eq '/');
4556
4557         # normalize link target to path from top (root) tree (dir)
4558         my $path;
4559         if ($basedir) {
4560                 $path = $basedir . '/' . $link_target;
4561         } else {
4562                 # we are in top (root) tree (dir)
4563                 $path = $link_target;
4564         }
4565
4566         # remove //, /./, and /../
4567         my @path_parts;
4568         foreach my $part (split('/', $path)) {
4569                 # discard '.' and ''
4570                 next if (!$part || $part eq '.');
4571                 # handle '..'
4572                 if ($part eq '..') {
4573                         if (@path_parts) {
4574                                 pop @path_parts;
4575                         } else {
4576                                 # link leads outside repository (outside top dir)
4577                                 return;
4578                         }
4579                 } else {
4580                         push @path_parts, $part;
4581                 }
4582         }
4583         $path = join('/', @path_parts);
4584
4585         return $path;
4586 }
4587
4588 # print tree entry (row of git_tree), but without encompassing <tr> element
4589 sub git_print_tree_entry {
4590         my ($t, $basedir, $hash_base, $have_blame) = @_;
4591
4592         my %base_key = ();
4593         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4594
4595         # The format of a table row is: mode list link.  Where mode is
4596         # the mode of the entry, list is the name of the entry, an href,
4597         # and link is the action links of the entry.
4598
4599         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4600         if (exists $t->{'size'}) {
4601                 print "<td class=\"size\">$t->{'size'}</td>\n";
4602         }
4603         if ($t->{'type'} eq "blob") {
4604                 print "<td class=\"list\">" .
4605                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4606                                                file_name=>"$basedir$t->{'name'}", %base_key),
4607                                 -class => "list"}, esc_path($t->{'name'}));
4608                 if (S_ISLNK(oct $t->{'mode'})) {
4609                         my $link_target = git_get_link_target($t->{'hash'});
4610                         if ($link_target) {
4611                                 my $norm_target = normalize_link_target($link_target, $basedir);
4612                                 if (defined $norm_target) {
4613                                         print " -> " .
4614                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4615                                                                      file_name=>$norm_target),
4616                                                        -title => $norm_target}, esc_path($link_target));
4617                                 } else {
4618                                         print " -> " . esc_path($link_target);
4619                                 }
4620                         }
4621                 }
4622                 print "</td>\n";
4623                 print "<td class=\"link\">";
4624                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4625                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4626                               "blob");
4627                 if ($have_blame) {
4628                         print " | " .
4629                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4630                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4631                                       "blame");
4632                 }
4633                 if (defined $hash_base) {
4634                         print " | " .
4635                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4636                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4637                                       "history");
4638                 }
4639                 print " | " .
4640                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4641                                                file_name=>"$basedir$t->{'name'}")},
4642                                 "raw");
4643                 print "</td>\n";
4644
4645         } elsif ($t->{'type'} eq "tree") {
4646                 print "<td class=\"list\">";
4647                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4648                                              file_name=>"$basedir$t->{'name'}",
4649                                              %base_key)},
4650                               esc_path($t->{'name'}));
4651                 print "</td>\n";
4652                 print "<td class=\"link\">";
4653                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4654                                              file_name=>"$basedir$t->{'name'}",
4655                                              %base_key)},
4656                               "tree");
4657                 if (defined $hash_base) {
4658                         print " | " .
4659                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4660                                                      file_name=>"$basedir$t->{'name'}")},
4661                                       "history");
4662                 }
4663                 print "</td>\n";
4664         } else {
4665                 # unknown object: we can only present history for it
4666                 # (this includes 'commit' object, i.e. submodule support)
4667                 print "<td class=\"list\">" .
4668                       esc_path($t->{'name'}) .
4669                       "</td>\n";
4670                 print "<td class=\"link\">";
4671                 if (defined $hash_base) {
4672                         print $cgi->a({-href => href(action=>"history",
4673                                                      hash_base=>$hash_base,
4674                                                      file_name=>"$basedir$t->{'name'}")},
4675                                       "history");
4676                 }
4677                 print "</td>\n";
4678         }
4679 }
4680
4681 ## ......................................................................
4682 ## functions printing large fragments of HTML
4683
4684 # get pre-image filenames for merge (combined) diff
4685 sub fill_from_file_info {
4686         my ($diff, @parents) = @_;
4687
4688         $diff->{'from_file'} = [ ];
4689         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4690         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4691                 if ($diff->{'status'}[$i] eq 'R' ||
4692                     $diff->{'status'}[$i] eq 'C') {
4693                         $diff->{'from_file'}[$i] =
4694                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4695                 }
4696         }
4697
4698         return $diff;
4699 }
4700
4701 # is current raw difftree line of file deletion
4702 sub is_deleted {
4703         my $diffinfo = shift;
4704
4705         return $diffinfo->{'to_id'} eq ('0' x 40);
4706 }
4707
4708 # does patch correspond to [previous] difftree raw line
4709 # $diffinfo  - hashref of parsed raw diff format
4710 # $patchinfo - hashref of parsed patch diff format
4711 #              (the same keys as in $diffinfo)
4712 sub is_patch_split {
4713         my ($diffinfo, $patchinfo) = @_;
4714
4715         return defined $diffinfo && defined $patchinfo
4716                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4717 }
4718
4719
4720 sub git_difftree_body {
4721         my ($difftree, $hash, @parents) = @_;
4722         my ($parent) = $parents[0];
4723         my $have_blame = gitweb_check_feature('blame');
4724         print "<div class=\"list_head\">\n";
4725         if ($#{$difftree} > 10) {
4726                 print(($#{$difftree} + 1) . " files changed:\n");
4727         }
4728         print "</div>\n";
4729
4730         print "<table class=\"" .
4731               (@parents > 1 ? "combined " : "") .
4732               "diff_tree\">\n";
4733
4734         # header only for combined diff in 'commitdiff' view
4735         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4736         if ($has_header) {
4737                 # table header
4738                 print "<thead><tr>\n" .
4739                        "<th></th><th></th>\n"; # filename, patchN link
4740                 for (my $i = 0; $i < @parents; $i++) {
4741                         my $par = $parents[$i];
4742                         print "<th>" .
4743                               $cgi->a({-href => href(action=>"commitdiff",
4744                                                      hash=>$hash, hash_parent=>$par),
4745                                        -title => 'commitdiff to parent number ' .
4746                                                   ($i+1) . ': ' . substr($par,0,7)},
4747                                       $i+1) .
4748                               "&nbsp;</th>\n";
4749                 }
4750                 print "</tr></thead>\n<tbody>\n";
4751         }
4752
4753         my $alternate = 1;
4754         my $patchno = 0;
4755         foreach my $line (@{$difftree}) {
4756                 my $diff = parsed_difftree_line($line);
4757
4758                 if ($alternate) {
4759                         print "<tr class=\"dark\">\n";
4760                 } else {
4761                         print "<tr class=\"light\">\n";
4762                 }
4763                 $alternate ^= 1;
4764
4765                 if (exists $diff->{'nparents'}) { # combined diff
4766
4767                         fill_from_file_info($diff, @parents)
4768                                 unless exists $diff->{'from_file'};
4769
4770                         if (!is_deleted($diff)) {
4771                                 # file exists in the result (child) commit
4772                                 print "<td>" .
4773                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4774                                                              file_name=>$diff->{'to_file'},
4775                                                              hash_base=>$hash),
4776                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4777                                       "</td>\n";
4778                         } else {
4779                                 print "<td>" .
4780                                       esc_path($diff->{'to_file'}) .
4781                                       "</td>\n";
4782                         }
4783
4784                         if ($action eq 'commitdiff') {
4785                                 # link to patch
4786                                 $patchno++;
4787                                 print "<td class=\"link\">" .
4788                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4789                                               "patch") .
4790                                       " | " .
4791                                       "</td>\n";
4792                         }
4793
4794                         my $has_history = 0;
4795                         my $not_deleted = 0;
4796                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4797                                 my $hash_parent = $parents[$i];
4798                                 my $from_hash = $diff->{'from_id'}[$i];
4799                                 my $from_path = $diff->{'from_file'}[$i];
4800                                 my $status = $diff->{'status'}[$i];
4801
4802                                 $has_history ||= ($status ne 'A');
4803                                 $not_deleted ||= ($status ne 'D');
4804
4805                                 if ($status eq 'A') {
4806                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4807                                 } elsif ($status eq 'D') {
4808                                         print "<td class=\"link\">" .
4809                                               $cgi->a({-href => href(action=>"blob",
4810                                                                      hash_base=>$hash,
4811                                                                      hash=>$from_hash,
4812                                                                      file_name=>$from_path)},
4813                                                       "blob" . ($i+1)) .
4814                                               " | </td>\n";
4815                                 } else {
4816                                         if ($diff->{'to_id'} eq $from_hash) {
4817                                                 print "<td class=\"link nochange\">";
4818                                         } else {
4819                                                 print "<td class=\"link\">";
4820                                         }
4821                                         print $cgi->a({-href => href(action=>"blobdiff",
4822                                                                      hash=>$diff->{'to_id'},
4823                                                                      hash_parent=>$from_hash,
4824                                                                      hash_base=>$hash,
4825                                                                      hash_parent_base=>$hash_parent,
4826                                                                      file_name=>$diff->{'to_file'},
4827                                                                      file_parent=>$from_path)},
4828                                                       "diff" . ($i+1)) .
4829                                               " | </td>\n";
4830                                 }
4831                         }
4832
4833                         print "<td class=\"link\">";
4834                         if ($not_deleted) {
4835                                 print $cgi->a({-href => href(action=>"blob",
4836                                                              hash=>$diff->{'to_id'},
4837                                                              file_name=>$diff->{'to_file'},
4838                                                              hash_base=>$hash)},
4839                                               "blob");
4840                                 print " | " if ($has_history);
4841                         }
4842                         if ($has_history) {
4843                                 print $cgi->a({-href => href(action=>"history",
4844                                                              file_name=>$diff->{'to_file'},
4845                                                              hash_base=>$hash)},
4846                                               "history");
4847                         }
4848                         print "</td>\n";
4849
4850                         print "</tr>\n";
4851                         next; # instead of 'else' clause, to avoid extra indent
4852                 }
4853                 # else ordinary diff
4854
4855                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4856                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4857                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4858                         $to_mode_oct = oct $diff->{'to_mode'};
4859                         if (S_ISREG($to_mode_oct)) { # only for regular file
4860                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4861                         }
4862                         $to_file_type = file_type($diff->{'to_mode'});
4863                 }
4864                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4865                         $from_mode_oct = oct $diff->{'from_mode'};
4866                         if (S_ISREG($from_mode_oct)) { # only for regular file
4867                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4868                         }
4869                         $from_file_type = file_type($diff->{'from_mode'});
4870                 }
4871
4872                 if ($diff->{'status'} eq "A") { # created
4873                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4874                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4875                         $mode_chng   .= "]</span>";
4876                         print "<td>";
4877                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4878                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4879                                       -class => "list"}, esc_path($diff->{'file'}));
4880                         print "</td>\n";
4881                         print "<td>$mode_chng</td>\n";
4882                         print "<td class=\"link\">";
4883                         if ($action eq 'commitdiff') {
4884                                 # link to patch
4885                                 $patchno++;
4886                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4887                                               "patch") .
4888                                       " | ";
4889                         }
4890                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4891                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4892                                       "blob");
4893                         print "</td>\n";
4894
4895                 } elsif ($diff->{'status'} eq "D") { # deleted
4896                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4897                         print "<td>";
4898                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4899                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4900                                        -class => "list"}, esc_path($diff->{'file'}));
4901                         print "</td>\n";
4902                         print "<td>$mode_chng</td>\n";
4903                         print "<td class=\"link\">";
4904                         if ($action eq 'commitdiff') {
4905                                 # link to patch
4906                                 $patchno++;
4907                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4908                                               "patch") .
4909                                       " | ";
4910                         }
4911                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4912                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4913                                       "blob") . " | ";
4914                         if ($have_blame) {
4915                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4916                                                              file_name=>$diff->{'file'})},
4917                                               "blame") . " | ";
4918                         }
4919                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4920                                                      file_name=>$diff->{'file'})},
4921                                       "history");
4922                         print "</td>\n";
4923
4924                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4925                         my $mode_chnge = "";
4926                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4927                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4928                                 if ($from_file_type ne $to_file_type) {
4929                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4930                                 }
4931                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4932                                         if ($from_mode_str && $to_mode_str) {
4933                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4934                                         } elsif ($to_mode_str) {
4935                                                 $mode_chnge .= " mode: $to_mode_str";
4936                                         }
4937                                 }
4938                                 $mode_chnge .= "]</span>\n";
4939                         }
4940                         print "<td>";
4941                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4942                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4943                                       -class => "list"}, esc_path($diff->{'file'}));
4944                         print "</td>\n";
4945                         print "<td>$mode_chnge</td>\n";
4946                         print "<td class=\"link\">";
4947                         if ($action eq 'commitdiff') {
4948                                 # link to patch
4949                                 $patchno++;
4950                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4951                                               "patch") .
4952                                       " | ";
4953                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4954                                 # "commit" view and modified file (not onlu mode changed)
4955                                 print $cgi->a({-href => href(action=>"blobdiff",
4956                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4957                                                              hash_base=>$hash, hash_parent_base=>$parent,
4958                                                              file_name=>$diff->{'file'})},
4959                                               "diff") .
4960                                       " | ";
4961                         }
4962                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4963                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4964                                        "blob") . " | ";
4965                         if ($have_blame) {
4966                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4967                                                              file_name=>$diff->{'file'})},
4968                                               "blame") . " | ";
4969                         }
4970                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4971                                                      file_name=>$diff->{'file'})},
4972                                       "history");
4973                         print "</td>\n";
4974
4975                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4976                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4977                         my $nstatus = $status_name{$diff->{'status'}};
4978                         my $mode_chng = "";
4979                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4980                                 # mode also for directories, so we cannot use $to_mode_str
4981                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4982                         }
4983                         print "<td>" .
4984                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4985                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4986                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4987                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4988                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4989                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4990                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4991                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4992                               "<td class=\"link\">";
4993                         if ($action eq 'commitdiff') {
4994                                 # link to patch
4995                                 $patchno++;
4996                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4997                                               "patch") .
4998                                       " | ";
4999                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5000                                 # "commit" view and modified file (not only pure rename or copy)
5001                                 print $cgi->a({-href => href(action=>"blobdiff",
5002                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5003                                                              hash_base=>$hash, hash_parent_base=>$parent,
5004                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5005                                               "diff") .
5006                                       " | ";
5007                         }
5008                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5009                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5010                                       "blob") . " | ";
5011                         if ($have_blame) {
5012                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5013                                                              file_name=>$diff->{'to_file'})},
5014                                               "blame") . " | ";
5015                         }
5016                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5017                                                     file_name=>$diff->{'to_file'})},
5018                                       "history");
5019                         print "</td>\n";
5020
5021                 } # we should not encounter Unmerged (U) or Unknown (X) status
5022                 print "</tr>\n";
5023         }
5024         print "</tbody>" if $has_header;
5025         print "</table>\n";
5026 }
5027
5028 # Print context lines and then rem/add lines in a side-by-side manner.
5029 sub print_sidebyside_diff_lines {
5030         my ($ctx, $rem, $add) = @_;
5031
5032         # print context block before add/rem block
5033         if (@$ctx) {
5034                 print join '',
5035                         '<div class="chunk_block ctx">',
5036                                 '<div class="old">',
5037                                 @$ctx,
5038                                 '</div>',
5039                                 '<div class="new">',
5040                                 @$ctx,
5041                                 '</div>',
5042                         '</div>';
5043         }
5044
5045         if (!@$add) {
5046                 # pure removal
5047                 print join '',
5048                         '<div class="chunk_block rem">',
5049                                 '<div class="old">',
5050                                 @$rem,
5051                                 '</div>',
5052                         '</div>';
5053         } elsif (!@$rem) {
5054                 # pure addition
5055                 print join '',
5056                         '<div class="chunk_block add">',
5057                                 '<div class="new">',
5058                                 @$add,
5059                                 '</div>',
5060                         '</div>';
5061         } else {
5062                 print join '',
5063                         '<div class="chunk_block chg">',
5064                                 '<div class="old">',
5065                                 @$rem,
5066                                 '</div>',
5067                                 '<div class="new">',
5068                                 @$add,
5069                                 '</div>',
5070                         '</div>';
5071         }
5072 }
5073
5074 # Print context lines and then rem/add lines in inline manner.
5075 sub print_inline_diff_lines {
5076         my ($ctx, $rem, $add) = @_;
5077
5078         print @$ctx, @$rem, @$add;
5079 }
5080
5081 # Format removed and added line, mark changed part and HTML-format them.
5082 # Implementation is based on contrib/diff-highlight
5083 sub format_rem_add_lines_pair {
5084         my ($rem, $add, $num_parents) = @_;
5085
5086         # We need to untabify lines before split()'ing them;
5087         # otherwise offsets would be invalid.
5088         chomp $rem;
5089         chomp $add;
5090         $rem = untabify($rem);
5091         $add = untabify($add);
5092
5093         my @rem = split(//, $rem);
5094         my @add = split(//, $add);
5095         my ($esc_rem, $esc_add);
5096         # Ignore leading +/- characters for each parent.
5097         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5098         my ($prefix_has_nonspace, $suffix_has_nonspace);
5099
5100         my $shorter = (@rem < @add) ? @rem : @add;
5101         while ($prefix_len < $shorter) {
5102                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5103
5104                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5105                 $prefix_len++;
5106         }
5107
5108         while ($prefix_len + $suffix_len < $shorter) {
5109                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5110
5111                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5112                 $suffix_len++;
5113         }
5114
5115         # Mark lines that are different from each other, but have some common
5116         # part that isn't whitespace.  If lines are completely different, don't
5117         # mark them because that would make output unreadable, especially if
5118         # diff consists of multiple lines.
5119         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5120                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5121                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5122                 $esc_add = esc_html_hl_regions($add, 'marked',
5123                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5124         } else {
5125                 $esc_rem = esc_html($rem, -nbsp=>1);
5126                 $esc_add = esc_html($add, -nbsp=>1);
5127         }
5128
5129         return format_diff_line(\$esc_rem, 'rem'),
5130                format_diff_line(\$esc_add, 'add');
5131 }
5132
5133 # HTML-format diff context, removed and added lines.
5134 sub format_ctx_rem_add_lines {
5135         my ($ctx, $rem, $add, $num_parents) = @_;
5136         my (@new_ctx, @new_rem, @new_add);
5137         my $can_highlight = 0;
5138         my $is_combined = ($num_parents > 1);
5139
5140         # Highlight if every removed line has a corresponding added line.
5141         if (@$add > 0 && @$add == @$rem) {
5142                 $can_highlight = 1;
5143
5144                 # Highlight lines in combined diff only if the chunk contains
5145                 # diff between the same version, e.g.
5146                 #
5147                 #    - a
5148                 #   -  b
5149                 #    + c
5150                 #   +  d
5151                 #
5152                 # Otherwise the highlightling would be confusing.
5153                 if ($is_combined) {
5154                         for (my $i = 0; $i < @$add; $i++) {
5155                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5156                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5157
5158                                 $prefix_rem =~ s/-/+/g;
5159
5160                                 if ($prefix_rem ne $prefix_add) {
5161                                         $can_highlight = 0;
5162                                         last;
5163                                 }
5164                         }
5165                 }
5166         }
5167
5168         if ($can_highlight) {
5169                 for (my $i = 0; $i < @$add; $i++) {
5170                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5171                                 $rem->[$i], $add->[$i], $num_parents);
5172                         push @new_rem, $line_rem;
5173                         push @new_add, $line_add;
5174                 }
5175         } else {
5176                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5177                 @new_add = map { format_diff_line($_, 'add') } @$add;
5178         }
5179
5180         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5181
5182         return (\@new_ctx, \@new_rem, \@new_add);
5183 }
5184
5185 # Print context lines and then rem/add lines.
5186 sub print_diff_lines {
5187         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5188         my $is_combined = $num_parents > 1;
5189
5190         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5191                 $num_parents);
5192
5193         if ($diff_style eq 'sidebyside' && !$is_combined) {
5194                 print_sidebyside_diff_lines($ctx, $rem, $add);
5195         } else {
5196                 # default 'inline' style and unknown styles
5197                 print_inline_diff_lines($ctx, $rem, $add);
5198         }
5199 }
5200
5201 sub print_diff_chunk {
5202         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5203         my (@ctx, @rem, @add);
5204
5205         # The class of the previous line.
5206         my $prev_class = '';
5207
5208         return unless @chunk;
5209
5210         # incomplete last line might be among removed or added lines,
5211         # or both, or among context lines: find which
5212         for (my $i = 1; $i < @chunk; $i++) {
5213                 if ($chunk[$i][0] eq 'incomplete') {
5214                         $chunk[$i][0] = $chunk[$i-1][0];
5215                 }
5216         }
5217
5218         # guardian
5219         push @chunk, ["", ""];
5220
5221         foreach my $line_info (@chunk) {
5222                 my ($class, $line) = @$line_info;
5223
5224                 # print chunk headers
5225                 if ($class && $class eq 'chunk_header') {
5226                         print format_diff_line($line, $class, $from, $to);
5227                         next;
5228                 }
5229
5230                 ## print from accumulator when have some add/rem lines or end
5231                 # of chunk (flush context lines), or when have add and rem
5232                 # lines and new block is reached (otherwise add/rem lines could
5233                 # be reordered)
5234                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5235                     (@rem && @add && $class ne $prev_class)) {
5236                         print_diff_lines(\@ctx, \@rem, \@add,
5237                                          $diff_style, $num_parents);
5238                         @ctx = @rem = @add = ();
5239                 }
5240
5241                 ## adding lines to accumulator
5242                 # guardian value
5243                 last unless $line;
5244                 # rem, add or change
5245                 if ($class eq 'rem') {
5246                         push @rem, $line;
5247                 } elsif ($class eq 'add') {
5248                         push @add, $line;
5249                 }
5250                 # context line
5251                 if ($class eq 'ctx') {
5252                         push @ctx, $line;
5253                 }
5254
5255                 $prev_class = $class;
5256         }
5257 }
5258
5259 sub git_patchset_body {
5260         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5261         my ($hash_parent) = $hash_parents[0];
5262
5263         my $is_combined = (@hash_parents > 1);
5264         my $patch_idx = 0;
5265         my $patch_number = 0;
5266         my $patch_line;
5267         my $diffinfo;
5268         my $to_name;
5269         my (%from, %to);
5270         my @chunk; # for side-by-side diff
5271
5272         print "<div class=\"patchset\">\n";
5273
5274         # skip to first patch
5275         while ($patch_line = <$fd>) {
5276                 chomp $patch_line;
5277
5278                 last if ($patch_line =~ m/^diff /);
5279         }
5280
5281  PATCH:
5282         while ($patch_line) {
5283
5284                 # parse "git diff" header line
5285                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5286                         # $1 is from_name, which we do not use
5287                         $to_name = unquote($2);
5288                         $to_name =~ s!^b/!!;
5289                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5290                         # $1 is 'cc' or 'combined', which we do not use
5291                         $to_name = unquote($2);
5292                 } else {
5293                         $to_name = undef;
5294                 }
5295
5296                 # check if current patch belong to current raw line
5297                 # and parse raw git-diff line if needed
5298                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5299                         # this is continuation of a split patch
5300                         print "<div class=\"patch cont\">\n";
5301                 } else {
5302                         # advance raw git-diff output if needed
5303                         $patch_idx++ if defined $diffinfo;
5304
5305                         # read and prepare patch information
5306                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5307
5308                         # compact combined diff output can have some patches skipped
5309                         # find which patch (using pathname of result) we are at now;
5310                         if ($is_combined) {
5311                                 while ($to_name ne $diffinfo->{'to_file'}) {
5312                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5313                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5314                                               "</div>\n";  # class="patch"
5315
5316                                         $patch_idx++;
5317                                         $patch_number++;
5318
5319                                         last if $patch_idx > $#$difftree;
5320                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5321                                 }
5322                         }
5323
5324                         # modifies %from, %to hashes
5325                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5326
5327                         # this is first patch for raw difftree line with $patch_idx index
5328                         # we index @$difftree array from 0, but number patches from 1
5329                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5330                 }
5331
5332                 # git diff header
5333                 #assert($patch_line =~ m/^diff /) if DEBUG;
5334                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5335                 $patch_number++;
5336                 # print "git diff" header
5337                 print format_git_diff_header_line($patch_line, $diffinfo,
5338                                                   \%from, \%to);
5339
5340                 # print extended diff header
5341                 print "<div class=\"diff extended_header\">\n";
5342         EXTENDED_HEADER:
5343                 while ($patch_line = <$fd>) {
5344                         chomp $patch_line;
5345
5346                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5347
5348                         print format_extended_diff_header_line($patch_line, $diffinfo,
5349                                                                \%from, \%to);
5350                 }
5351                 print "</div>\n"; # class="diff extended_header"
5352
5353                 # from-file/to-file diff header
5354                 if (! $patch_line) {
5355                         print "</div>\n"; # class="patch"
5356                         last PATCH;
5357                 }
5358                 next PATCH if ($patch_line =~ m/^diff /);
5359                 #assert($patch_line =~ m/^---/) if DEBUG;
5360
5361                 my $last_patch_line = $patch_line;
5362                 $patch_line = <$fd>;
5363                 chomp $patch_line;
5364                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5365
5366                 print format_diff_from_to_header($last_patch_line, $patch_line,
5367                                                  $diffinfo, \%from, \%to,
5368                                                  @hash_parents);
5369
5370                 # the patch itself
5371         LINE:
5372                 while ($patch_line = <$fd>) {
5373                         chomp $patch_line;
5374
5375                         next PATCH if ($patch_line =~ m/^diff /);
5376
5377                         my $class = diff_line_class($patch_line, \%from, \%to);
5378
5379                         if ($class eq 'chunk_header') {
5380                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5381                                 @chunk = ();
5382                         }
5383
5384                         push @chunk, [ $class, $patch_line ];
5385                 }
5386
5387         } continue {
5388                 if (@chunk) {
5389                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5390                         @chunk = ();
5391                 }
5392                 print "</div>\n"; # class="patch"
5393         }
5394
5395         # for compact combined (--cc) format, with chunk and patch simplification
5396         # the patchset might be empty, but there might be unprocessed raw lines
5397         for (++$patch_idx if $patch_number > 0;
5398              $patch_idx < @$difftree;
5399              ++$patch_idx) {
5400                 # read and prepare patch information
5401                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5402
5403                 # generate anchor for "patch" links in difftree / whatchanged part
5404                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5405                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5406                       "</div>\n";  # class="patch"
5407
5408                 $patch_number++;
5409         }
5410
5411         if ($patch_number == 0) {
5412                 if (@hash_parents > 1) {
5413                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5414                 } else {
5415                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5416                 }
5417         }
5418
5419         print "</div>\n"; # class="patchset"
5420 }
5421
5422 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5423
5424 sub git_project_search_form {
5425         my ($searchtext, $search_use_regexp) = @_;
5426
5427         my $limit = '';
5428         if ($project_filter) {
5429                 $limit = " in '$project_filter/'";
5430         }
5431
5432         print "<div class=\"projsearch\">\n";
5433         print $cgi->startform(-method => 'get', -action => $my_uri) .
5434               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5435         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5436                 if (defined $project_filter);
5437         print $cgi->textfield(-name => 's', -value => $searchtext,
5438                               -title => "Search project by name and description$limit",
5439                               -size => 60) . "\n" .
5440               "<span title=\"Extended regular expression\">" .
5441               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5442                              -checked => $search_use_regexp) .
5443               "</span>\n" .
5444               $cgi->submit(-name => 'btnS', -value => 'Search') .
5445               $cgi->end_form() . "\n" .
5446               $cgi->a({-href => href(project => undef, searchtext => undef,
5447                                      project_filter => $project_filter)},
5448                       esc_html("List all projects$limit")) . "<br />\n";
5449         print "</div>\n";
5450 }
5451
5452 # entry for given @keys needs filling if at least one of keys in list
5453 # is not present in %$project_info
5454 sub project_info_needs_filling {
5455         my ($project_info, @keys) = @_;
5456
5457         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5458         foreach my $key (@keys) {
5459                 if (!exists $project_info->{$key}) {
5460                         return 1;
5461                 }
5462         }
5463         return;
5464 }
5465
5466 # fills project list info (age, description, owner, category, forks, etc.)
5467 # for each project in the list, removing invalid projects from
5468 # returned list, or fill only specified info.
5469 #
5470 # Invalid projects are removed from the returned list if and only if you
5471 # ask 'age' or 'age_string' to be filled, because they are the only fields
5472 # that run unconditionally git command that requires repository, and
5473 # therefore do always check if project repository is invalid.
5474 #
5475 # USAGE:
5476 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5477 #   ensures that 'descr_long' and 'ctags' fields are filled
5478 # * @project_list = fill_project_list_info(\@project_list)
5479 #   ensures that all fields are filled (and invalid projects removed)
5480 #
5481 # NOTE: modifies $projlist, but does not remove entries from it
5482 sub fill_project_list_info {
5483         my ($projlist, @wanted_keys) = @_;
5484         my @projects;
5485         my $filter_set = sub { return @_; };
5486         if (@wanted_keys) {
5487                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5488                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5489         }
5490
5491         my $show_ctags = gitweb_check_feature('ctags');
5492  PROJECT:
5493         foreach my $pr (@$projlist) {
5494                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5495                         my (@activity) = git_get_last_activity($pr->{'path'});
5496                         unless (@activity) {
5497                                 next PROJECT;
5498                         }
5499                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5500                 }
5501                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5502                         my $descr = git_get_project_description($pr->{'path'}) || "";
5503                         $descr = to_utf8($descr);
5504                         $pr->{'descr_long'} = $descr;
5505                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5506                 }
5507                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5508                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5509                 }
5510                 if ($show_ctags &&
5511                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5512                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5513                 }
5514                 if ($projects_list_group_categories &&
5515                     project_info_needs_filling($pr, $filter_set->('category'))) {
5516                         my $cat = git_get_project_category($pr->{'path'}) ||
5517                                                            $project_list_default_category;
5518                         $pr->{'category'} = to_utf8($cat);
5519                 }
5520
5521                 push @projects, $pr;
5522         }
5523
5524         return @projects;
5525 }
5526
5527 sub sort_projects_list {
5528         my ($projlist, $order) = @_;
5529         my @projects;
5530
5531         my %order_info = (
5532                 project => { key => 'path', type => 'str' },
5533                 descr => { key => 'descr_long', type => 'str' },
5534                 owner => { key => 'owner', type => 'str' },
5535                 age => { key => 'age', type => 'num' }
5536         );
5537         my $oi = $order_info{$order};
5538         return @$projlist unless defined $oi;
5539         if ($oi->{'type'} eq 'str') {
5540                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5541         } else {
5542                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5543         }
5544
5545         return @projects;
5546 }
5547
5548 # returns a hash of categories, containing the list of project
5549 # belonging to each category
5550 sub build_projlist_by_category {
5551         my ($projlist, $from, $to) = @_;
5552         my %categories;
5553
5554         $from = 0 unless defined $from;
5555         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5556
5557         for (my $i = $from; $i <= $to; $i++) {
5558                 my $pr = $projlist->[$i];
5559                 push @{$categories{ $pr->{'category'} }}, $pr;
5560         }
5561
5562         return wantarray ? %categories : \%categories;
5563 }
5564
5565 # print 'sort by' <th> element, generating 'sort by $name' replay link
5566 # if that order is not selected
5567 sub print_sort_th {
5568         print format_sort_th(@_);
5569 }
5570
5571 sub format_sort_th {
5572         my ($name, $order, $header) = @_;
5573         my $sort_th = "";
5574         $header ||= ucfirst($name);
5575
5576         if ($order eq $name) {
5577                 $sort_th .= "<th>$header</th>\n";
5578         } else {
5579                 $sort_th .= "<th>" .
5580                             $cgi->a({-href => href(-replay=>1, order=>$name),
5581                                      -class => "header"}, $header) .
5582                             "</th>\n";
5583         }
5584
5585         return $sort_th;
5586 }
5587
5588 sub git_project_list_rows {
5589         my ($projlist, $from, $to, $check_forks) = @_;
5590
5591         $from = 0 unless defined $from;
5592         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5593
5594         my $alternate = 1;
5595         for (my $i = $from; $i <= $to; $i++) {
5596                 my $pr = $projlist->[$i];
5597
5598                 if ($alternate) {
5599                         print "<tr class=\"dark\">\n";
5600                 } else {
5601                         print "<tr class=\"light\">\n";
5602                 }
5603                 $alternate ^= 1;
5604
5605                 if ($check_forks) {
5606                         print "<td>";
5607                         if ($pr->{'forks'}) {
5608                                 my $nforks = scalar @{$pr->{'forks'}};
5609                                 if ($nforks > 0) {
5610                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5611                                                        -title => "$nforks forks"}, "+");
5612                                 } else {
5613                                         print $cgi->span({-title => "$nforks forks"}, "+");
5614                                 }
5615                         }
5616                         print "</td>\n";
5617                 }
5618                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5619                                         -class => "list"},
5620                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5621                       "</td>\n" .
5622                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5623                                         -class => "list",
5624                                         -title => $pr->{'descr_long'}},
5625                                         $search_regexp
5626                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5627                                                                     $pr->{'descr'}, $search_regexp)
5628                                         : esc_html($pr->{'descr'})) .
5629                       "</td>\n";
5630                 unless ($omit_owner) {
5631                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5632                 }
5633                 unless ($omit_age_column) {
5634                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5635                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5636                 }
5637                 print"<td class=\"link\">" .
5638                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5639                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5640                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5641                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5642                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5643                       "</td>\n" .
5644                       "</tr>\n";
5645         }
5646 }
5647
5648 sub git_project_list_body {
5649         # actually uses global variable $project
5650         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5651         my @projects = @$projlist;
5652
5653         my $check_forks = gitweb_check_feature('forks');
5654         my $show_ctags  = gitweb_check_feature('ctags');
5655         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5656         $check_forks = undef
5657                 if ($tagfilter || $search_regexp);
5658
5659         # filtering out forks before filling info allows to do less work
5660         @projects = filter_forks_from_projects_list(\@projects)
5661                 if ($check_forks);
5662         # search_projects_list pre-fills required info
5663         @projects = search_projects_list(\@projects,
5664                                          'search_regexp' => $search_regexp,
5665                                          'tagfilter'  => $tagfilter)
5666                 if ($tagfilter || $search_regexp);
5667         # fill the rest
5668         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5669         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5670         push @all_fields, 'owner' unless($omit_owner);
5671         @projects = fill_project_list_info(\@projects, @all_fields);
5672
5673         $order ||= $default_projects_order;
5674         $from = 0 unless defined $from;
5675         $to = $#projects if (!defined $to || $#projects < $to);
5676
5677         # short circuit
5678         if ($from > $to) {
5679                 print "<center>\n".
5680                       "<b>No such projects found</b><br />\n".
5681                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5682                       "</center>\n<br />\n";
5683                 return;
5684         }
5685
5686         @projects = sort_projects_list(\@projects, $order);
5687
5688         if ($show_ctags) {
5689                 my $ctags = git_gather_all_ctags(\@projects);
5690                 my $cloud = git_populate_project_tagcloud($ctags);
5691                 print git_show_project_tagcloud($cloud, 64);
5692         }
5693
5694         print "<table class=\"project_list\">\n";
5695         unless ($no_header) {
5696                 print "<tr>\n";
5697                 if ($check_forks) {
5698                         print "<th></th>\n";
5699                 }
5700                 print_sort_th('project', $order, 'Project');
5701                 print_sort_th('descr', $order, 'Description');
5702                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5703                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5704                 print "<th></th>\n" . # for links
5705                       "</tr>\n";
5706         }
5707
5708         if ($projects_list_group_categories) {
5709                 # only display categories with projects in the $from-$to window
5710                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5711                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5712                 foreach my $cat (sort keys %categories) {
5713                         unless ($cat eq "") {
5714                                 print "<tr>\n";
5715                                 if ($check_forks) {
5716                                         print "<td></td>\n";
5717                                 }
5718                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5719                                 print "</tr>\n";
5720                         }
5721
5722                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5723                 }
5724         } else {
5725                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5726         }
5727
5728         if (defined $extra) {
5729                 print "<tr>\n";
5730                 if ($check_forks) {
5731                         print "<td></td>\n";
5732                 }
5733                 print "<td colspan=\"5\">$extra</td>\n" .
5734                       "</tr>\n";
5735         }
5736         print "</table>\n";
5737 }
5738
5739 sub git_log_body {
5740         # uses global variable $project
5741         my ($commitlist, $from, $to, $refs, $extra) = @_;
5742
5743         $from = 0 unless defined $from;
5744         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5745
5746         for (my $i = 0; $i <= $to; $i++) {
5747                 my %co = %{$commitlist->[$i]};
5748                 next if !%co;
5749                 my $commit = $co{'id'};
5750                 my $ref = format_ref_marker($refs, $commit);
5751                 git_print_header_div('commit',
5752                                "<span class=\"age\">$co{'age_string'}</span>" .
5753                                esc_html($co{'title'}) . $ref,
5754                                $commit);
5755                 print "<div class=\"title_text\">\n" .
5756                       "<div class=\"log_link\">\n" .
5757                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5758                       " | " .
5759                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5760                       " | " .
5761                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5762                       "<br/>\n" .
5763                       "</div>\n";
5764                       git_print_authorship(\%co, -tag => 'span');
5765                       print "<br/>\n</div>\n";
5766
5767                 print "<div class=\"log_body\">\n";
5768                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5769                 print "</div>\n";
5770         }
5771         if ($extra) {
5772                 print "<div class=\"page_nav\">\n";
5773                 print "$extra\n";
5774                 print "</div>\n";
5775         }
5776 }
5777
5778 sub git_shortlog_body {
5779         # uses global variable $project
5780         my ($commitlist, $from, $to, $refs, $extra) = @_;
5781
5782         $from = 0 unless defined $from;
5783         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5784
5785         print "<table class=\"shortlog\">\n";
5786         my $alternate = 1;
5787         for (my $i = $from; $i <= $to; $i++) {
5788                 my %co = %{$commitlist->[$i]};
5789                 my $commit = $co{'id'};
5790                 my $ref = format_ref_marker($refs, $commit);
5791                 if ($alternate) {
5792                         print "<tr class=\"dark\">\n";
5793                 } else {
5794                         print "<tr class=\"light\">\n";
5795                 }
5796                 $alternate ^= 1;
5797                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5798                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5799                       format_author_html('td', \%co, 10) . "<td>";
5800                 print format_subject_html($co{'title'}, $co{'title_short'},
5801                                           href(action=>"commit", hash=>$commit), $ref);
5802                 print "</td>\n" .
5803                       "<td class=\"link\">" .
5804                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5805                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5806                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5807                 my $snapshot_links = format_snapshot_links($commit);
5808                 if (defined $snapshot_links) {
5809                         print " | " . $snapshot_links;
5810                 }
5811                 print "</td>\n" .
5812                       "</tr>\n";
5813         }
5814         if (defined $extra) {
5815                 print "<tr>\n" .
5816                       "<td colspan=\"4\">$extra</td>\n" .
5817                       "</tr>\n";
5818         }
5819         print "</table>\n";
5820 }
5821
5822 sub git_history_body {
5823         # Warning: assumes constant type (blob or tree) during history
5824         my ($commitlist, $from, $to, $refs, $extra,
5825             $file_name, $file_hash, $ftype) = @_;
5826
5827         $from = 0 unless defined $from;
5828         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5829
5830         print "<table class=\"history\">\n";
5831         my $alternate = 1;
5832         for (my $i = $from; $i <= $to; $i++) {
5833                 my %co = %{$commitlist->[$i]};
5834                 if (!%co) {
5835                         next;
5836                 }
5837                 my $commit = $co{'id'};
5838
5839                 my $ref = format_ref_marker($refs, $commit);
5840
5841                 if ($alternate) {
5842                         print "<tr class=\"dark\">\n";
5843                 } else {
5844                         print "<tr class=\"light\">\n";
5845                 }
5846                 $alternate ^= 1;
5847                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5848         # shortlog:   format_author_html('td', \%co, 10)
5849                       format_author_html('td', \%co, 15, 3) . "<td>";
5850                 # originally git_history used chop_str($co{'title'}, 50)
5851                 print format_subject_html($co{'title'}, $co{'title_short'},
5852                                           href(action=>"commit", hash=>$commit), $ref);
5853                 print "</td>\n" .
5854                       "<td class=\"link\">" .
5855                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5856                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5857
5858                 if ($ftype eq 'blob') {
5859                         my $blob_current = $file_hash;
5860                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5861                         if (defined $blob_current && defined $blob_parent &&
5862                                         $blob_current ne $blob_parent) {
5863                                 print " | " .
5864                                         $cgi->a({-href => href(action=>"blobdiff",
5865                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5866                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5867                                                                file_name=>$file_name)},
5868                                                 "diff to current");
5869                         }
5870                 }
5871                 print "</td>\n" .
5872                       "</tr>\n";
5873         }
5874         if (defined $extra) {
5875                 print "<tr>\n" .
5876                       "<td colspan=\"4\">$extra</td>\n" .
5877                       "</tr>\n";
5878         }
5879         print "</table>\n";
5880 }
5881
5882 sub git_tags_body {
5883         # uses global variable $project
5884         my ($taglist, $from, $to, $extra) = @_;
5885         $from = 0 unless defined $from;
5886         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5887
5888         print "<table class=\"tags\">\n";
5889         my $alternate = 1;
5890         for (my $i = $from; $i <= $to; $i++) {
5891                 my $entry = $taglist->[$i];
5892                 my %tag = %$entry;
5893                 my $comment = $tag{'subject'};
5894                 my $comment_short;
5895                 if (defined $comment) {
5896                         $comment_short = chop_str($comment, 30, 5);
5897                 }
5898                 if ($alternate) {
5899                         print "<tr class=\"dark\">\n";
5900                 } else {
5901                         print "<tr class=\"light\">\n";
5902                 }
5903                 $alternate ^= 1;
5904                 if (defined $tag{'age'}) {
5905                         print "<td><i>$tag{'age'}</i></td>\n";
5906                 } else {
5907                         print "<td></td>\n";
5908                 }
5909                 print "<td>" .
5910                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5911                                -class => "list name"}, esc_html($tag{'name'})) .
5912                       "</td>\n" .
5913                       "<td>";
5914                 if (defined $comment) {
5915                         print format_subject_html($comment, $comment_short,
5916                                                   href(action=>"tag", hash=>$tag{'id'}));
5917                 }
5918                 print "</td>\n" .
5919                       "<td class=\"selflink\">";
5920                 if ($tag{'type'} eq "tag") {
5921                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5922                 } else {
5923                         print "&nbsp;";
5924                 }
5925                 print "</td>\n" .
5926                       "<td class=\"link\">" . " | " .
5927                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5928                 if ($tag{'reftype'} eq "commit") {
5929                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5930                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5931                 } elsif ($tag{'reftype'} eq "blob") {
5932                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5933                 }
5934                 print "</td>\n" .
5935                       "</tr>";
5936         }
5937         if (defined $extra) {
5938                 print "<tr>\n" .
5939                       "<td colspan=\"5\">$extra</td>\n" .
5940                       "</tr>\n";
5941         }
5942         print "</table>\n";
5943 }
5944
5945 sub git_heads_body {
5946         # uses global variable $project
5947         my ($headlist, $head_at, $from, $to, $extra) = @_;
5948         $from = 0 unless defined $from;
5949         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5950
5951         print "<table class=\"heads\">\n";
5952         my $alternate = 1;
5953         for (my $i = $from; $i <= $to; $i++) {
5954                 my $entry = $headlist->[$i];
5955                 my %ref = %$entry;
5956                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5957                 if ($alternate) {
5958                         print "<tr class=\"dark\">\n";
5959                 } else {
5960                         print "<tr class=\"light\">\n";
5961                 }
5962                 $alternate ^= 1;
5963                 print "<td><i>$ref{'age'}</i></td>\n" .
5964                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5965                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5966                                -class => "list name"},esc_html($ref{'name'})) .
5967                       "</td>\n" .
5968                       "<td class=\"link\">" .
5969                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5970                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5971                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5972                       "</td>\n" .
5973                       "</tr>";
5974         }
5975         if (defined $extra) {
5976                 print "<tr>\n" .
5977                       "<td colspan=\"3\">$extra</td>\n" .
5978                       "</tr>\n";
5979         }
5980         print "</table>\n";
5981 }
5982
5983 # Display a single remote block
5984 sub git_remote_block {
5985         my ($remote, $rdata, $limit, $head) = @_;
5986
5987         my $heads = $rdata->{'heads'};
5988         my $fetch = $rdata->{'fetch'};
5989         my $push = $rdata->{'push'};
5990
5991         my $urls_table = "<table class=\"projects_list\">\n" ;
5992
5993         if (defined $fetch) {
5994                 if ($fetch eq $push) {
5995                         $urls_table .= format_repo_url("URL", $fetch);
5996                 } else {
5997                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5998                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5999                 }
6000         } elsif (defined $push) {
6001                 $urls_table .= format_repo_url("Push URL", $push);
6002         } else {
6003                 $urls_table .= format_repo_url("", "No remote URL");
6004         }
6005
6006         $urls_table .= "</table>\n";
6007
6008         my $dots;
6009         if (defined $limit && $limit < @$heads) {
6010                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6011         }
6012
6013         print $urls_table;
6014         git_heads_body($heads, $head, 0, $limit, $dots);
6015 }
6016
6017 # Display a list of remote names with the respective fetch and push URLs
6018 sub git_remotes_list {
6019         my ($remotedata, $limit) = @_;
6020         print "<table class=\"heads\">\n";
6021         my $alternate = 1;
6022         my @remotes = sort keys %$remotedata;
6023
6024         my $limited = $limit && $limit < @remotes;
6025
6026         $#remotes = $limit - 1 if $limited;
6027
6028         while (my $remote = shift @remotes) {
6029                 my $rdata = $remotedata->{$remote};
6030                 my $fetch = $rdata->{'fetch'};
6031                 my $push = $rdata->{'push'};
6032                 if ($alternate) {
6033                         print "<tr class=\"dark\">\n";
6034                 } else {
6035                         print "<tr class=\"light\">\n";
6036                 }
6037                 $alternate ^= 1;
6038                 print "<td>" .
6039                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6040                                -class=> "list name"},esc_html($remote)) .
6041                       "</td>";
6042                 print "<td class=\"link\">" .
6043                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6044                       " | " .
6045                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6046                       "</td>";
6047
6048                 print "</tr>\n";
6049         }
6050
6051         if ($limited) {
6052                 print "<tr>\n" .
6053                       "<td colspan=\"3\">" .
6054                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6055                       "</td>\n" . "</tr>\n";
6056         }
6057
6058         print "</table>";
6059 }
6060
6061 # Display remote heads grouped by remote, unless there are too many
6062 # remotes, in which case we only display the remote names
6063 sub git_remotes_body {
6064         my ($remotedata, $limit, $head) = @_;
6065         if ($limit and $limit < keys %$remotedata) {
6066                 git_remotes_list($remotedata, $limit);
6067         } else {
6068                 fill_remote_heads($remotedata);
6069                 while (my ($remote, $rdata) = each %$remotedata) {
6070                         git_print_section({-class=>"remote", -id=>$remote},
6071                                 ["remotes", $remote, $remote], sub {
6072                                         git_remote_block($remote, $rdata, $limit, $head);
6073                                 });
6074                 }
6075         }
6076 }
6077
6078 sub git_search_message {
6079         my %co = @_;
6080
6081         my $greptype;
6082         if ($searchtype eq 'commit') {
6083                 $greptype = "--grep=";
6084         } elsif ($searchtype eq 'author') {
6085                 $greptype = "--author=";
6086         } elsif ($searchtype eq 'committer') {
6087                 $greptype = "--committer=";
6088         }
6089         $greptype .= $searchtext;
6090         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6091                                        $greptype, '--regexp-ignore-case',
6092                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6093
6094         my $paging_nav = '';
6095         if ($page > 0) {
6096                 $paging_nav .=
6097                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6098                                 "first") .
6099                         " &sdot; " .
6100                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6101                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6102         } else {
6103                 $paging_nav .= "first &sdot; prev";
6104         }
6105         my $next_link = '';
6106         if ($#commitlist >= 100) {
6107                 $next_link =
6108                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6109                                  -accesskey => "n", -title => "Alt-n"}, "next");
6110                 $paging_nav .= " &sdot; $next_link";
6111         } else {
6112                 $paging_nav .= " &sdot; next";
6113         }
6114
6115         git_header_html();
6116
6117         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6118         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6119         if ($page == 0 && !@commitlist) {
6120                 print "<p>No match.</p>\n";
6121         } else {
6122                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6123         }
6124
6125         git_footer_html();
6126 }
6127
6128 sub git_search_changes {
6129         my %co = @_;
6130
6131         local $/ = "\n";
6132         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6133                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6134                 ($search_use_regexp ? '--pickaxe-regex' : ())
6135                         or die_error(500, "Open git-log failed");
6136
6137         git_header_html();
6138
6139         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6140         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6141
6142         print "<table class=\"pickaxe search\">\n";
6143         my $alternate = 1;
6144         undef %co;
6145         my @files;
6146         while (my $line = <$fd>) {
6147                 chomp $line;
6148                 next unless $line;
6149
6150                 my %set = parse_difftree_raw_line($line);
6151                 if (defined $set{'commit'}) {
6152                         # finish previous commit
6153                         if (%co) {
6154                                 print "</td>\n" .
6155                                       "<td class=\"link\">" .
6156                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6157                                               "commit") .
6158                                       " | " .
6159                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6160                                                              hash_base=>$co{'id'})},
6161                                               "tree") .
6162                                       "</td>\n" .
6163                                       "</tr>\n";
6164                         }
6165
6166                         if ($alternate) {
6167                                 print "<tr class=\"dark\">\n";
6168                         } else {
6169                                 print "<tr class=\"light\">\n";
6170                         }
6171                         $alternate ^= 1;
6172                         %co = parse_commit($set{'commit'});
6173                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6174                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6175                               "<td><i>$author</i></td>\n" .
6176                               "<td>" .
6177                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6178                                       -class => "list subject"},
6179                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6180                 } elsif (defined $set{'to_id'}) {
6181                         next if ($set{'to_id'} =~ m/^0{40}$/);
6182
6183                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6184                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6185                                       -class => "list"},
6186                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6187                               "<br/>\n";
6188                 }
6189         }
6190         close $fd;
6191
6192         # finish last commit (warning: repetition!)
6193         if (%co) {
6194                 print "</td>\n" .
6195                       "<td class=\"link\">" .
6196                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6197                               "commit") .
6198                       " | " .
6199                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6200                                              hash_base=>$co{'id'})},
6201                               "tree") .
6202                       "</td>\n" .
6203                       "</tr>\n";
6204         }
6205
6206         print "</table>\n";
6207
6208         git_footer_html();
6209 }
6210
6211 sub git_search_files {
6212         my %co = @_;
6213
6214         local $/ = "\n";
6215         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6216                 $search_use_regexp ? ('-E', '-i') : '-F',
6217                 $searchtext, $co{'tree'}
6218                         or die_error(500, "Open git-grep failed");
6219
6220         git_header_html();
6221
6222         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6223         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6224
6225         print "<table class=\"grep_search\">\n";
6226         my $alternate = 1;
6227         my $matches = 0;
6228         my $lastfile = '';
6229         my $file_href;
6230         while (my $line = <$fd>) {
6231                 chomp $line;
6232                 my ($file, $lno, $ltext, $binary);
6233                 last if ($matches++ > 1000);
6234                 if ($line =~ /^Binary file (.+) matches$/) {
6235                         $file = $1;
6236                         $binary = 1;
6237                 } else {
6238                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6239                         $file =~ s/^$co{'tree'}://;
6240                 }
6241                 if ($file ne $lastfile) {
6242                         $lastfile and print "</td></tr>\n";
6243                         if ($alternate++) {
6244                                 print "<tr class=\"dark\">\n";
6245                         } else {
6246                                 print "<tr class=\"light\">\n";
6247                         }
6248                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6249                                           file_name=>$file);
6250                         print "<td class=\"list\">".
6251                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6252                         print "</td><td>\n";
6253                         $lastfile = $file;
6254                 }
6255                 if ($binary) {
6256                         print "<div class=\"binary\">Binary file</div>\n";
6257                 } else {
6258                         $ltext = untabify($ltext);
6259                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6260                                 $ltext = esc_html($1, -nbsp=>1);
6261                                 $ltext .= '<span class="match">';
6262                                 $ltext .= esc_html($2, -nbsp=>1);
6263                                 $ltext .= '</span>';
6264                                 $ltext .= esc_html($3, -nbsp=>1);
6265                         } else {
6266                                 $ltext = esc_html($ltext, -nbsp=>1);
6267                         }
6268                         print "<div class=\"pre\">" .
6269                                 $cgi->a({-href => $file_href.'#l'.$lno,
6270                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6271                                 ' ' .  $ltext . "</div>\n";
6272                 }
6273         }
6274         if ($lastfile) {
6275                 print "</td></tr>\n";
6276                 if ($matches > 1000) {
6277                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6278                 }
6279         } else {
6280                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6281         }
6282         close $fd;
6283
6284         print "</table>\n";
6285
6286         git_footer_html();
6287 }
6288
6289 sub git_search_grep_body {
6290         my ($commitlist, $from, $to, $extra) = @_;
6291         $from = 0 unless defined $from;
6292         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6293
6294         print "<table class=\"commit_search\">\n";
6295         my $alternate = 1;
6296         for (my $i = $from; $i <= $to; $i++) {
6297                 my %co = %{$commitlist->[$i]};
6298                 if (!%co) {
6299                         next;
6300                 }
6301                 my $commit = $co{'id'};
6302                 if ($alternate) {
6303                         print "<tr class=\"dark\">\n";
6304                 } else {
6305                         print "<tr class=\"light\">\n";
6306                 }
6307                 $alternate ^= 1;
6308                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6309                       format_author_html('td', \%co, 15, 5) .
6310                       "<td>" .
6311                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6312                                -class => "list subject"},
6313                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6314                 my $comment = $co{'comment'};
6315                 foreach my $line (@$comment) {
6316                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6317                                 my ($lead, $match, $trail) = ($1, $2, $3);
6318                                 $match = chop_str($match, 70, 5, 'center');
6319                                 my $contextlen = int((80 - length($match))/2);
6320                                 $contextlen = 30 if ($contextlen > 30);
6321                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6322                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6323
6324                                 $lead  = esc_html($lead);
6325                                 $match = esc_html($match);
6326                                 $trail = esc_html($trail);
6327
6328                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6329                         }
6330                 }
6331                 print "</td>\n" .
6332                       "<td class=\"link\">" .
6333                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6334                       " | " .
6335                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6336                       " | " .
6337                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6338                 print "</td>\n" .
6339                       "</tr>\n";
6340         }
6341         if (defined $extra) {
6342                 print "<tr>\n" .
6343                       "<td colspan=\"3\">$extra</td>\n" .
6344                       "</tr>\n";
6345         }
6346         print "</table>\n";
6347 }
6348
6349 ## ======================================================================
6350 ## ======================================================================
6351 ## actions
6352
6353 sub git_project_list {
6354         my $order = $input_params{'order'};
6355         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6356                 die_error(400, "Unknown order parameter");
6357         }
6358
6359         my @list = git_get_projects_list($project_filter, $strict_export);
6360         if (!@list) {
6361                 die_error(404, "No projects found");
6362         }
6363
6364         git_header_html();
6365         if (defined $home_text && -f $home_text) {
6366                 print "<div class=\"index_include\">\n";
6367                 insert_file($home_text);
6368                 print "</div>\n";
6369         }
6370
6371         git_project_search_form($searchtext, $search_use_regexp);
6372         git_project_list_body(\@list, $order);
6373         git_footer_html();
6374 }
6375
6376 sub git_forks {
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 $filter = $project;
6383         $filter =~ s/\.git$//;
6384         my @list = git_get_projects_list($filter);
6385         if (!@list) {
6386                 die_error(404, "No forks found");
6387         }
6388
6389         git_header_html();
6390         git_print_page_nav('','');
6391         git_print_header_div('summary', "$project forks");
6392         git_project_list_body(\@list, $order);
6393         git_footer_html();
6394 }
6395
6396 sub git_project_index {
6397         my @projects = git_get_projects_list($project_filter, $strict_export);
6398         if (!@projects) {
6399                 die_error(404, "No projects found");
6400         }
6401
6402         print $cgi->header(
6403                 -type => 'text/plain',
6404                 -charset => 'utf-8',
6405                 -content_disposition => 'inline; filename="index.aux"');
6406
6407         foreach my $pr (@projects) {
6408                 if (!exists $pr->{'owner'}) {
6409                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6410                 }
6411
6412                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6413                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6414                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6415                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6416                 $path  =~ s/ /\+/g;
6417                 $owner =~ s/ /\+/g;
6418
6419                 print "$path $owner\n";
6420         }
6421 }
6422
6423 sub git_summary {
6424         my $descr = git_get_project_description($project) || "none";
6425         my %co = parse_commit("HEAD");
6426         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6427         my $head = $co{'id'};
6428         my $remote_heads = gitweb_check_feature('remote_heads');
6429
6430         my $owner = git_get_project_owner($project);
6431
6432         my $refs = git_get_references();
6433         # These get_*_list functions return one more to allow us to see if
6434         # there are more ...
6435         my @taglist  = git_get_tags_list(16);
6436         my @headlist = git_get_heads_list(16);
6437         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6438         my @forklist;
6439         my $check_forks = gitweb_check_feature('forks');
6440
6441         if ($check_forks) {
6442                 # find forks of a project
6443                 my $filter = $project;
6444                 $filter =~ s/\.git$//;
6445                 @forklist = git_get_projects_list($filter);
6446                 # filter out forks of forks
6447                 @forklist = filter_forks_from_projects_list(\@forklist)
6448                         if (@forklist);
6449         }
6450
6451         git_header_html();
6452         git_print_page_nav('summary','', $head);
6453
6454         print "<div class=\"title\">&nbsp;</div>\n";
6455         print "<table class=\"projects_list\">\n" .
6456               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6457         unless ($omit_owner) {
6458                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6459         }
6460         if (defined $cd{'rfc2822'}) {
6461                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6462                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6463         }
6464
6465         # use per project git URL list in $projectroot/$project/cloneurl
6466         # or make project git URL from git base URL and project name
6467         my $url_tag = "URL";
6468         my @url_list = git_get_project_url_list($project);
6469         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6470         foreach my $git_url (@url_list) {
6471                 next unless $git_url;
6472                 print format_repo_url($url_tag, $git_url);
6473                 $url_tag = "";
6474         }
6475
6476         # Tag cloud
6477         my $show_ctags = gitweb_check_feature('ctags');
6478         if ($show_ctags) {
6479                 my $ctags = git_get_project_ctags($project);
6480                 if (%$ctags) {
6481                         # without ability to add tags, don't show if there are none
6482                         my $cloud = git_populate_project_tagcloud($ctags);
6483                         print "<tr id=\"metadata_ctags\">" .
6484                               "<td>content tags</td>" .
6485                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6486                               "</tr>\n";
6487                 }
6488         }
6489
6490         print "</table>\n";
6491
6492         # If XSS prevention is on, we don't include README.html.
6493         # TODO: Allow a readme in some safe format.
6494         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6495                 print "<div class=\"title\">readme</div>\n" .
6496                       "<div class=\"readme\">\n";
6497                 insert_file("$projectroot/$project/README.html");
6498                 print "\n</div>\n"; # class="readme"
6499         }
6500
6501         # we need to request one more than 16 (0..15) to check if
6502         # those 16 are all
6503         my @commitlist = $head ? parse_commits($head, 17) : ();
6504         if (@commitlist) {
6505                 git_print_header_div('shortlog');
6506                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6507                                   $#commitlist <=  15 ? undef :
6508                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6509         }
6510
6511         if (@taglist) {
6512                 git_print_header_div('tags');
6513                 git_tags_body(\@taglist, 0, 15,
6514                               $#taglist <=  15 ? undef :
6515                               $cgi->a({-href => href(action=>"tags")}, "..."));
6516         }
6517
6518         if (@headlist) {
6519                 git_print_header_div('heads');
6520                 git_heads_body(\@headlist, $head, 0, 15,
6521                                $#headlist <= 15 ? undef :
6522                                $cgi->a({-href => href(action=>"heads")}, "..."));
6523         }
6524
6525         if (%remotedata) {
6526                 git_print_header_div('remotes');
6527                 git_remotes_body(\%remotedata, 15, $head);
6528         }
6529
6530         if (@forklist) {
6531                 git_print_header_div('forks');
6532                 git_project_list_body(\@forklist, 'age', 0, 15,
6533                                       $#forklist <= 15 ? undef :
6534                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6535                                       'no_header');
6536         }
6537
6538         git_footer_html();
6539 }
6540
6541 sub git_tag {
6542         my %tag = parse_tag($hash);
6543
6544         if (! %tag) {
6545                 die_error(404, "Unknown tag object");
6546         }
6547
6548         my $head = git_get_head_hash($project);
6549         git_header_html();
6550         git_print_page_nav('','', $head,undef,$head);
6551         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6552         print "<div class=\"title_text\">\n" .
6553               "<table class=\"object_header\">\n" .
6554               "<tr>\n" .
6555               "<td>object</td>\n" .
6556               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6557                                $tag{'object'}) . "</td>\n" .
6558               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6559                                               $tag{'type'}) . "</td>\n" .
6560               "</tr>\n";
6561         if (defined($tag{'author'})) {
6562                 git_print_authorship_rows(\%tag, 'author');
6563         }
6564         print "</table>\n\n" .
6565               "</div>\n";
6566         print "<div class=\"page_body\">";
6567         my $comment = $tag{'comment'};
6568         foreach my $line (@$comment) {
6569                 chomp $line;
6570                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6571         }
6572         print "</div>\n";
6573         git_footer_html();
6574 }
6575
6576 sub git_blame_common {
6577         my $format = shift || 'porcelain';
6578         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6579                 $format = 'incremental';
6580                 $action = 'blame_incremental'; # for page title etc
6581         }
6582
6583         # permissions
6584         gitweb_check_feature('blame')
6585                 or die_error(403, "Blame view not allowed");
6586
6587         # error checking
6588         die_error(400, "No file name given") unless $file_name;
6589         $hash_base ||= git_get_head_hash($project);
6590         die_error(404, "Couldn't find base commit") unless $hash_base;
6591         my %co = parse_commit($hash_base)
6592                 or die_error(404, "Commit not found");
6593         my $ftype = "blob";
6594         if (!defined $hash) {
6595                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6596                         or die_error(404, "Error looking up file");
6597         } else {
6598                 $ftype = git_get_type($hash);
6599                 if ($ftype !~ "blob") {
6600                         die_error(400, "Object is not a blob");
6601                 }
6602         }
6603
6604         my $fd;
6605         if ($format eq 'incremental') {
6606                 # get file contents (as base)
6607                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6608                         or die_error(500, "Open git-cat-file failed");
6609         } elsif ($format eq 'data') {
6610                 # run git-blame --incremental
6611                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6612                         $hash_base, "--", $file_name
6613                         or die_error(500, "Open git-blame --incremental failed");
6614         } else {
6615                 # run git-blame --porcelain
6616                 open $fd, "-|", git_cmd(), "blame", '-p',
6617                         $hash_base, '--', $file_name
6618                         or die_error(500, "Open git-blame --porcelain failed");
6619         }
6620
6621         # incremental blame data returns early
6622         if ($format eq 'data') {
6623                 print $cgi->header(
6624                         -type=>"text/plain", -charset => "utf-8",
6625                         -status=> "200 OK");
6626                 local $| = 1; # output autoflush
6627                 while (my $line = <$fd>) {
6628                         print to_utf8($line);
6629                 }
6630                 close $fd
6631                         or print "ERROR $!\n";
6632
6633                 print 'END';
6634                 if (defined $t0 && gitweb_check_feature('timed')) {
6635                         print ' '.
6636                               tv_interval($t0, [ gettimeofday() ]).
6637                               ' '.$number_of_git_cmds;
6638                 }
6639                 print "\n";
6640
6641                 return;
6642         }
6643
6644         # page header
6645         git_header_html();
6646         my $formats_nav =
6647                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6648                         "blob") .
6649                 " | ";
6650         if ($format eq 'incremental') {
6651                 $formats_nav .=
6652                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6653                                 "blame") . " (non-incremental)";
6654         } else {
6655                 $formats_nav .=
6656                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6657                                 "blame") . " (incremental)";
6658         }
6659         $formats_nav .=
6660                 " | " .
6661                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6662                         "history") .
6663                 " | " .
6664                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6665                         "HEAD");
6666         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6667         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6668         git_print_page_path($file_name, $ftype, $hash_base);
6669
6670         # page body
6671         if ($format eq 'incremental') {
6672                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6673                       "This page requires JavaScript to run.\n Use ".
6674                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6675                               'this page').
6676                       " instead.\n".
6677                       "</b></center></div>\n</noscript>\n";
6678
6679                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6680         }
6681
6682         print qq!<div class="page_body">\n!;
6683         print qq!<div id="progress_info">... / ...</div>\n!
6684                 if ($format eq 'incremental');
6685         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6686               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6687               qq!<thead>\n!.
6688               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6689               qq!</thead>\n!.
6690               qq!<tbody>\n!;
6691
6692         my @rev_color = qw(light dark);
6693         my $num_colors = scalar(@rev_color);
6694         my $current_color = 0;
6695
6696         if ($format eq 'incremental') {
6697                 my $color_class = $rev_color[$current_color];
6698
6699                 #contents of a file
6700                 my $linenr = 0;
6701         LINE:
6702                 while (my $line = <$fd>) {
6703                         chomp $line;
6704                         $linenr++;
6705
6706                         print qq!<tr id="l$linenr" class="$color_class">!.
6707                               qq!<td class="sha1"><a href=""> </a></td>!.
6708                               qq!<td class="linenr">!.
6709                               qq!<a class="linenr" href="">$linenr</a></td>!;
6710                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6711                         print qq!</tr>\n!;
6712                 }
6713
6714         } else { # porcelain, i.e. ordinary blame
6715                 my %metainfo = (); # saves information about commits
6716
6717                 # blame data
6718         LINE:
6719                 while (my $line = <$fd>) {
6720                         chomp $line;
6721                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6722                         # no <lines in group> for subsequent lines in group of lines
6723                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6724                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6725                         if (!exists $metainfo{$full_rev}) {
6726                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6727                         }
6728                         my $meta = $metainfo{$full_rev};
6729                         my $data;
6730                         while ($data = <$fd>) {
6731                                 chomp $data;
6732                                 last if ($data =~ s/^\t//); # contents of line
6733                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6734                                         $meta->{$1} = $2 unless exists $meta->{$1};
6735                                 }
6736                                 if ($data =~ /^previous /) {
6737                                         $meta->{'nprevious'}++;
6738                                 }
6739                         }
6740                         my $short_rev = substr($full_rev, 0, 8);
6741                         my $author = $meta->{'author'};
6742                         my %date =
6743                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6744                         my $date = $date{'iso-tz'};
6745                         if ($group_size) {
6746                                 $current_color = ($current_color + 1) % $num_colors;
6747                         }
6748                         my $tr_class = $rev_color[$current_color];
6749                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6750                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6751                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6752                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6753                         if ($group_size) {
6754                                 print "<td class=\"sha1\"";
6755                                 print " title=\"". esc_html($author) . ", $date\"";
6756                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6757                                 print ">";
6758                                 print $cgi->a({-href => href(action=>"commit",
6759                                                              hash=>$full_rev,
6760                                                              file_name=>$file_name)},
6761                                               esc_html($short_rev));
6762                                 if ($group_size >= 2) {
6763                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6764                                         if (@author_initials) {
6765                                                 print "<br />" .
6766                                                       esc_html(join('', @author_initials));
6767                                                 #           or join('.', ...)
6768                                         }
6769                                 }
6770                                 print "</td>\n";
6771                         }
6772                         # 'previous' <sha1 of parent commit> <filename at commit>
6773                         if (exists $meta->{'previous'} &&
6774                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6775                                 $meta->{'parent'} = $1;
6776                                 $meta->{'file_parent'} = unquote($2);
6777                         }
6778                         my $linenr_commit =
6779                                 exists($meta->{'parent'}) ?
6780                                 $meta->{'parent'} : $full_rev;
6781                         my $linenr_filename =
6782                                 exists($meta->{'file_parent'}) ?
6783                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6784                         my $blamed = href(action => 'blame',
6785                                           file_name => $linenr_filename,
6786                                           hash_base => $linenr_commit);
6787                         print "<td class=\"linenr\">";
6788                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6789                                         -class => "linenr" },
6790                                       esc_html($lineno));
6791                         print "</td>";
6792                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6793                         print "</tr>\n";
6794                 } # end while
6795
6796         }
6797
6798         # footer
6799         print "</tbody>\n".
6800               "</table>\n"; # class="blame"
6801         print "</div>\n";   # class="blame_body"
6802         close $fd
6803                 or print "Reading blob failed\n";
6804
6805         git_footer_html();
6806 }
6807
6808 sub git_blame {
6809         git_blame_common();
6810 }
6811
6812 sub git_blame_incremental {
6813         git_blame_common('incremental');
6814 }
6815
6816 sub git_blame_data {
6817         git_blame_common('data');
6818 }
6819
6820 sub git_tags {
6821         my $head = git_get_head_hash($project);
6822         git_header_html();
6823         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6824         git_print_header_div('summary', $project);
6825
6826         my @tagslist = git_get_tags_list();
6827         if (@tagslist) {
6828                 git_tags_body(\@tagslist);
6829         }
6830         git_footer_html();
6831 }
6832
6833 sub git_heads {
6834         my $head = git_get_head_hash($project);
6835         git_header_html();
6836         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6837         git_print_header_div('summary', $project);
6838
6839         my @headslist = git_get_heads_list();
6840         if (@headslist) {
6841                 git_heads_body(\@headslist, $head);
6842         }
6843         git_footer_html();
6844 }
6845
6846 # used both for single remote view and for list of all the remotes
6847 sub git_remotes {
6848         gitweb_check_feature('remote_heads')
6849                 or die_error(403, "Remote heads view is disabled");
6850
6851         my $head = git_get_head_hash($project);
6852         my $remote = $input_params{'hash'};
6853
6854         my $remotedata = git_get_remotes_list($remote);
6855         die_error(500, "Unable to get remote information") unless defined $remotedata;
6856
6857         unless (%$remotedata) {
6858                 die_error(404, defined $remote ?
6859                         "Remote $remote not found" :
6860                         "No remotes found");
6861         }
6862
6863         git_header_html(undef, undef, -action_extra => $remote);
6864         git_print_page_nav('', '',  $head, undef, $head,
6865                 format_ref_views($remote ? '' : 'remotes'));
6866
6867         fill_remote_heads($remotedata);
6868         if (defined $remote) {
6869                 git_print_header_div('remotes', "$remote remote for $project");
6870                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6871         } else {
6872                 git_print_header_div('summary', "$project remotes");
6873                 git_remotes_body($remotedata, undef, $head);
6874         }
6875
6876         git_footer_html();
6877 }
6878
6879 sub git_blob_plain {
6880         my $type = shift;
6881         my $expires;
6882
6883         if (!defined $hash) {
6884                 if (defined $file_name) {
6885                         my $base = $hash_base || git_get_head_hash($project);
6886                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6887                                 or die_error(404, "Cannot find file");
6888                 } else {
6889                         die_error(400, "No file name defined");
6890                 }
6891         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6892                 # blobs defined by non-textual hash id's can be cached
6893                 $expires = "+1d";
6894         }
6895
6896         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6897                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6898
6899         # content-type (can include charset)
6900         $type = blob_contenttype($fd, $file_name, $type);
6901
6902         # "save as" filename, even when no $file_name is given
6903         my $save_as = "$hash";
6904         if (defined $file_name) {
6905                 $save_as = $file_name;
6906         } elsif ($type =~ m/^text\//) {
6907                 $save_as .= '.txt';
6908         }
6909
6910         # With XSS prevention on, blobs of all types except a few known safe
6911         # ones are served with "Content-Disposition: attachment" to make sure
6912         # they don't run in our security domain.  For certain image types,
6913         # blob view writes an <img> tag referring to blob_plain view, and we
6914         # want to be sure not to break that by serving the image as an
6915         # attachment (though Firefox 3 doesn't seem to care).
6916         my $sandbox = $prevent_xss &&
6917                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6918
6919         # serve text/* as text/plain
6920         if ($prevent_xss &&
6921             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6922              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6923                 my $rest = $1;
6924                 $rest = defined $rest ? $rest : '';
6925                 $type = "text/plain$rest";
6926         }
6927
6928         print $cgi->header(
6929                 -type => $type,
6930                 -expires => $expires,
6931                 -content_disposition =>
6932                         ($sandbox ? 'attachment' : 'inline')
6933                         . '; filename="' . $save_as . '"');
6934         local $/ = undef;
6935         binmode STDOUT, ':raw';
6936         print <$fd>;
6937         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6938         close $fd;
6939 }
6940
6941 sub git_blob {
6942         my $expires;
6943
6944         if (!defined $hash) {
6945                 if (defined $file_name) {
6946                         my $base = $hash_base || git_get_head_hash($project);
6947                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6948                                 or die_error(404, "Cannot find file");
6949                 } else {
6950                         die_error(400, "No file name defined");
6951                 }
6952         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6953                 # blobs defined by non-textual hash id's can be cached
6954                 $expires = "+1d";
6955         }
6956
6957         my $have_blame = gitweb_check_feature('blame');
6958         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6959                 or die_error(500, "Couldn't cat $file_name, $hash");
6960         my $mimetype = blob_mimetype($fd, $file_name);
6961         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6962         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6963                 close $fd;
6964                 return git_blob_plain($mimetype);
6965         }
6966         # we can have blame only for text/* mimetype
6967         $have_blame &&= ($mimetype =~ m!^text/!);
6968
6969         my $highlight = gitweb_check_feature('highlight');
6970         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6971         $fd = run_highlighter($fd, $highlight, $syntax)
6972                 if $syntax;
6973
6974         git_header_html(undef, $expires);
6975         my $formats_nav = '';
6976         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6977                 if (defined $file_name) {
6978                         if ($have_blame) {
6979                                 $formats_nav .=
6980                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6981                                                 "blame") .
6982                                         " | ";
6983                         }
6984                         $formats_nav .=
6985                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6986                                         "history") .
6987                                 " | " .
6988                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6989                                         "raw") .
6990                                 " | " .
6991                                 $cgi->a({-href => href(action=>"blob",
6992                                                        hash_base=>"HEAD", file_name=>$file_name)},
6993                                         "HEAD");
6994                 } else {
6995                         $formats_nav .=
6996                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6997                                         "raw");
6998                 }
6999                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7000                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7001         } else {
7002                 print "<div class=\"page_nav\">\n" .
7003                       "<br/><br/></div>\n" .
7004                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7005         }
7006         git_print_page_path($file_name, "blob", $hash_base);
7007         print "<div class=\"page_body\">\n";
7008         if ($mimetype =~ m!^image/!) {
7009                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7010                 if ($file_name) {
7011                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7012                 }
7013                 print qq! src="! .
7014                       href(action=>"blob_plain", hash=>$hash,
7015                            hash_base=>$hash_base, file_name=>$file_name) .
7016                       qq!" />\n!;
7017         } else {
7018                 my $nr;
7019                 while (my $line = <$fd>) {
7020                         chomp $line;
7021                         $nr++;
7022                         $line = untabify($line);
7023                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7024                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7025                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7026                 }
7027         }
7028         close $fd
7029                 or print "Reading blob failed.\n";
7030         print "</div>";
7031         git_footer_html();
7032 }
7033
7034 sub git_tree {
7035         if (!defined $hash_base) {
7036                 $hash_base = "HEAD";
7037         }
7038         if (!defined $hash) {
7039                 if (defined $file_name) {
7040                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7041                 } else {
7042                         $hash = $hash_base;
7043                 }
7044         }
7045         die_error(404, "No such tree") unless defined($hash);
7046
7047         my $show_sizes = gitweb_check_feature('show-sizes');
7048         my $have_blame = gitweb_check_feature('blame');
7049
7050         my @entries = ();
7051         {
7052                 local $/ = "\0";
7053                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7054                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7055                         or die_error(500, "Open git-ls-tree failed");
7056                 @entries = map { chomp; $_ } <$fd>;
7057                 close $fd
7058                         or die_error(404, "Reading tree failed");
7059         }
7060
7061         my $refs = git_get_references();
7062         my $ref = format_ref_marker($refs, $hash_base);
7063         git_header_html();
7064         my $basedir = '';
7065         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7066                 my @views_nav = ();
7067                 if (defined $file_name) {
7068                         push @views_nav,
7069                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7070                                         "history"),
7071                                 $cgi->a({-href => href(action=>"tree",
7072                                                        hash_base=>"HEAD", file_name=>$file_name)},
7073                                         "HEAD"),
7074                 }
7075                 my $snapshot_links = format_snapshot_links($hash);
7076                 if (defined $snapshot_links) {
7077                         # FIXME: Should be available when we have no hash base as well.
7078                         push @views_nav, $snapshot_links;
7079                 }
7080                 git_print_page_nav('tree','', $hash_base, undef, undef,
7081                                    join(' | ', @views_nav));
7082                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7083         } else {
7084                 undef $hash_base;
7085                 print "<div class=\"page_nav\">\n";
7086                 print "<br/><br/></div>\n";
7087                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7088         }
7089         if (defined $file_name) {
7090                 $basedir = $file_name;
7091                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7092                         $basedir .= '/';
7093                 }
7094                 git_print_page_path($file_name, 'tree', $hash_base);
7095         }
7096         print "<div class=\"page_body\">\n";
7097         print "<table class=\"tree\">\n";
7098         my $alternate = 1;
7099         # '..' (top directory) link if possible
7100         if (defined $hash_base &&
7101             defined $file_name && $file_name =~ m![^/]+$!) {
7102                 if ($alternate) {
7103                         print "<tr class=\"dark\">\n";
7104                 } else {
7105                         print "<tr class=\"light\">\n";
7106                 }
7107                 $alternate ^= 1;
7108
7109                 my $up = $file_name;
7110                 $up =~ s!/?[^/]+$!!;
7111                 undef $up unless $up;
7112                 # based on git_print_tree_entry
7113                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7114                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7115                 print '<td class="list">';
7116                 print $cgi->a({-href => href(action=>"tree",
7117                                              hash_base=>$hash_base,
7118                                              file_name=>$up)},
7119                               "..");
7120                 print "</td>\n";
7121                 print "<td class=\"link\"></td>\n";
7122
7123                 print "</tr>\n";
7124         }
7125         foreach my $line (@entries) {
7126                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7127
7128                 if ($alternate) {
7129                         print "<tr class=\"dark\">\n";
7130                 } else {
7131                         print "<tr class=\"light\">\n";
7132                 }
7133                 $alternate ^= 1;
7134
7135                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7136
7137                 print "</tr>\n";
7138         }
7139         print "</table>\n" .
7140               "</div>";
7141         git_footer_html();
7142 }
7143
7144 sub snapshot_name {
7145         my ($project, $hash) = @_;
7146
7147         # path/to/project.git  -> project
7148         # path/to/project/.git -> project
7149         my $name = to_utf8($project);
7150         $name =~ s,([^/])/*\.git$,$1,;
7151         $name = basename($name);
7152         # sanitize name
7153         $name =~ s/[[:cntrl:]]/?/g;
7154
7155         my $ver = $hash;
7156         if ($hash =~ /^[0-9a-fA-F]+$/) {
7157                 # shorten SHA-1 hash
7158                 my $full_hash = git_get_full_hash($project, $hash);
7159                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7160                         $ver = git_get_short_hash($project, $hash);
7161                 }
7162         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7163                 # tags don't need shortened SHA-1 hash
7164                 $ver = $1;
7165         } else {
7166                 # branches and other need shortened SHA-1 hash
7167                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7168                         $ver = $1;
7169                 }
7170                 $ver .= '-' . git_get_short_hash($project, $hash);
7171         }
7172         # in case of hierarchical branch names
7173         $ver =~ s!/!.!g;
7174
7175         # name = project-version_string
7176         $name = "$name-$ver";
7177
7178         return wantarray ? ($name, $name) : $name;
7179 }
7180
7181 sub exit_if_unmodified_since {
7182         my ($latest_epoch) = @_;
7183         our $cgi;
7184
7185         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7186         if (defined $if_modified) {
7187                 my $since;
7188                 if (eval { require HTTP::Date; 1; }) {
7189                         $since = HTTP::Date::str2time($if_modified);
7190                 } elsif (eval { require Time::ParseDate; 1; }) {
7191                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7192                 }
7193                 if (defined $since && $latest_epoch <= $since) {
7194                         my %latest_date = parse_date($latest_epoch);
7195                         print $cgi->header(
7196                                 -last_modified => $latest_date{'rfc2822'},
7197                                 -status => '304 Not Modified');
7198                         goto DONE_GITWEB;
7199                 }
7200         }
7201 }
7202
7203 sub git_snapshot {
7204         my $format = $input_params{'snapshot_format'};
7205         if (!@snapshot_fmts) {
7206                 die_error(403, "Snapshots not allowed");
7207         }
7208         # default to first supported snapshot format
7209         $format ||= $snapshot_fmts[0];
7210         if ($format !~ m/^[a-z0-9]+$/) {
7211                 die_error(400, "Invalid snapshot format parameter");
7212         } elsif (!exists($known_snapshot_formats{$format})) {
7213                 die_error(400, "Unknown snapshot format");
7214         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7215                 die_error(403, "Snapshot format not allowed");
7216         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7217                 die_error(403, "Unsupported snapshot format");
7218         }
7219
7220         my $type = git_get_type("$hash^{}");
7221         if (!$type) {
7222                 die_error(404, 'Object does not exist');
7223         }  elsif ($type eq 'blob') {
7224                 die_error(400, 'Object is not a tree-ish');
7225         }
7226
7227         my ($name, $prefix) = snapshot_name($project, $hash);
7228         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7229
7230         my %co = parse_commit($hash);
7231         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7232
7233         my $cmd = quote_command(
7234                 git_cmd(), 'archive',
7235                 "--format=$known_snapshot_formats{$format}{'format'}",
7236                 "--prefix=$prefix/", $hash);
7237         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7238                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7239         }
7240
7241         $filename =~ s/(["\\])/\\$1/g;
7242         my %latest_date;
7243         if (%co) {
7244                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7245         }
7246
7247         print $cgi->header(
7248                 -type => $known_snapshot_formats{$format}{'type'},
7249                 -content_disposition => 'inline; filename="' . $filename . '"',
7250                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7251                 -status => '200 OK');
7252
7253         open my $fd, "-|", $cmd
7254                 or die_error(500, "Execute git-archive failed");
7255         binmode STDOUT, ':raw';
7256         print <$fd>;
7257         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7258         close $fd;
7259 }
7260
7261 sub git_log_generic {
7262         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7263
7264         my $head = git_get_head_hash($project);
7265         if (!defined $base) {
7266                 $base = $head;
7267         }
7268         if (!defined $page) {
7269                 $page = 0;
7270         }
7271         my $refs = git_get_references();
7272
7273         my $commit_hash = $base;
7274         if (defined $parent) {
7275                 $commit_hash = "$parent..$base";
7276         }
7277         my @commitlist =
7278                 parse_commits($commit_hash, 101, (100 * $page),
7279                               defined $file_name ? ($file_name, "--full-history") : ());
7280
7281         my $ftype;
7282         if (!defined $file_hash && defined $file_name) {
7283                 # some commits could have deleted file in question,
7284                 # and not have it in tree, but one of them has to have it
7285                 for (my $i = 0; $i < @commitlist; $i++) {
7286                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7287                         last if defined $file_hash;
7288                 }
7289         }
7290         if (defined $file_hash) {
7291                 $ftype = git_get_type($file_hash);
7292         }
7293         if (defined $file_name && !defined $ftype) {
7294                 die_error(500, "Unknown type of object");
7295         }
7296         my %co;
7297         if (defined $file_name) {
7298                 %co = parse_commit($base)
7299                         or die_error(404, "Unknown commit object");
7300         }
7301
7302
7303         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7304         my $next_link = '';
7305         if ($#commitlist >= 100) {
7306                 $next_link =
7307                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7308                                  -accesskey => "n", -title => "Alt-n"}, "next");
7309         }
7310         my $patch_max = gitweb_get_feature('patches');
7311         if ($patch_max && !defined $file_name) {
7312                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7313                         $paging_nav .= " &sdot; " .
7314                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7315                                         "patches");
7316                 }
7317         }
7318
7319         git_header_html();
7320         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7321         if (defined $file_name) {
7322                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7323         } else {
7324                 git_print_header_div('summary', $project)
7325         }
7326         git_print_page_path($file_name, $ftype, $hash_base)
7327                 if (defined $file_name);
7328
7329         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7330                      $file_name, $file_hash, $ftype);
7331
7332         git_footer_html();
7333 }
7334
7335 sub git_log {
7336         git_log_generic('log', \&git_log_body,
7337                         $hash, $hash_parent);
7338 }
7339
7340 sub git_commit {
7341         $hash ||= $hash_base || "HEAD";
7342         my %co = parse_commit($hash)
7343             or die_error(404, "Unknown commit object");
7344
7345         my $parent  = $co{'parent'};
7346         my $parents = $co{'parents'}; # listref
7347
7348         # we need to prepare $formats_nav before any parameter munging
7349         my $formats_nav;
7350         if (!defined $parent) {
7351                 # --root commitdiff
7352                 $formats_nav .= '(initial)';
7353         } elsif (@$parents == 1) {
7354                 # single parent commit
7355                 $formats_nav .=
7356                         '(parent: ' .
7357                         $cgi->a({-href => href(action=>"commit",
7358                                                hash=>$parent)},
7359                                 esc_html(substr($parent, 0, 7))) .
7360                         ')';
7361         } else {
7362                 # merge commit
7363                 $formats_nav .=
7364                         '(merge: ' .
7365                         join(' ', map {
7366                                 $cgi->a({-href => href(action=>"commit",
7367                                                        hash=>$_)},
7368                                         esc_html(substr($_, 0, 7)));
7369                         } @$parents ) .
7370                         ')';
7371         }
7372         if (gitweb_check_feature('patches') && @$parents <= 1) {
7373                 $formats_nav .= " | " .
7374                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7375                                 "patch");
7376         }
7377
7378         if (!defined $parent) {
7379                 $parent = "--root";
7380         }
7381         my @difftree;
7382         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7383                 @diff_opts,
7384                 (@$parents <= 1 ? $parent : '-c'),
7385                 $hash, "--"
7386                 or die_error(500, "Open git-diff-tree failed");
7387         @difftree = map { chomp; $_ } <$fd>;
7388         close $fd or die_error(404, "Reading git-diff-tree failed");
7389
7390         # non-textual hash id's can be cached
7391         my $expires;
7392         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7393                 $expires = "+1d";
7394         }
7395         my $refs = git_get_references();
7396         my $ref = format_ref_marker($refs, $co{'id'});
7397
7398         git_header_html(undef, $expires);
7399         git_print_page_nav('commit', '',
7400                            $hash, $co{'tree'}, $hash,
7401                            $formats_nav);
7402
7403         if (defined $co{'parent'}) {
7404                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7405         } else {
7406                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7407         }
7408         print "<div class=\"title_text\">\n" .
7409               "<table class=\"object_header\">\n";
7410         git_print_authorship_rows(\%co);
7411         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7412         print "<tr>" .
7413               "<td>tree</td>" .
7414               "<td class=\"sha1\">" .
7415               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7416                        class => "list"}, $co{'tree'}) .
7417               "</td>" .
7418               "<td class=\"link\">" .
7419               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7420                       "tree");
7421         my $snapshot_links = format_snapshot_links($hash);
7422         if (defined $snapshot_links) {
7423                 print " | " . $snapshot_links;
7424         }
7425         print "</td>" .
7426               "</tr>\n";
7427
7428         foreach my $par (@$parents) {
7429                 print "<tr>" .
7430                       "<td>parent</td>" .
7431                       "<td class=\"sha1\">" .
7432                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7433                                class => "list"}, $par) .
7434                       "</td>" .
7435                       "<td class=\"link\">" .
7436                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7437                       " | " .
7438                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7439                       "</td>" .
7440                       "</tr>\n";
7441         }
7442         print "</table>".
7443               "</div>\n";
7444
7445         print "<div class=\"page_body\">\n";
7446         git_print_log($co{'comment'});
7447         print "</div>\n";
7448
7449         git_difftree_body(\@difftree, $hash, @$parents);
7450
7451         git_footer_html();
7452 }
7453
7454 sub git_object {
7455         # object is defined by:
7456         # - hash or hash_base alone
7457         # - hash_base and file_name
7458         my $type;
7459
7460         # - hash or hash_base alone
7461         if ($hash || ($hash_base && !defined $file_name)) {
7462                 my $object_id = $hash || $hash_base;
7463
7464                 open my $fd, "-|", quote_command(
7465                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7466                         or die_error(404, "Object does not exist");
7467                 $type = <$fd>;
7468                 chomp $type;
7469                 close $fd
7470                         or die_error(404, "Object does not exist");
7471
7472         # - hash_base and file_name
7473         } elsif ($hash_base && defined $file_name) {
7474                 $file_name =~ s,/+$,,;
7475
7476                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7477                         or die_error(404, "Base object does not exist");
7478
7479                 # here errors should not hapen
7480                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7481                         or die_error(500, "Open git-ls-tree failed");
7482                 my $line = <$fd>;
7483                 close $fd;
7484
7485                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7486                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7487                         die_error(404, "File or directory for given base does not exist");
7488                 }
7489                 $type = $2;
7490                 $hash = $3;
7491         } else {
7492                 die_error(400, "Not enough information to find object");
7493         }
7494
7495         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7496                                           hash=>$hash, hash_base=>$hash_base,
7497                                           file_name=>$file_name),
7498                              -status => '302 Found');
7499 }
7500
7501 sub git_blobdiff {
7502         my $format = shift || 'html';
7503         my $diff_style = $input_params{'diff_style'} || 'inline';
7504
7505         my $fd;
7506         my @difftree;
7507         my %diffinfo;
7508         my $expires;
7509
7510         # preparing $fd and %diffinfo for git_patchset_body
7511         # new style URI
7512         if (defined $hash_base && defined $hash_parent_base) {
7513                 if (defined $file_name) {
7514                         # read raw output
7515                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7516                                 $hash_parent_base, $hash_base,
7517                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7518                                 or die_error(500, "Open git-diff-tree failed");
7519                         @difftree = map { chomp; $_ } <$fd>;
7520                         close $fd
7521                                 or die_error(404, "Reading git-diff-tree failed");
7522                         @difftree
7523                                 or die_error(404, "Blob diff not found");
7524
7525                 } elsif (defined $hash &&
7526                          $hash =~ /[0-9a-fA-F]{40}/) {
7527                         # try to find filename from $hash
7528
7529                         # read filtered raw output
7530                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7531                                 $hash_parent_base, $hash_base, "--"
7532                                 or die_error(500, "Open git-diff-tree failed");
7533                         @difftree =
7534                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7535                                 # $hash == to_id
7536                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7537                                 map { chomp; $_ } <$fd>;
7538                         close $fd
7539                                 or die_error(404, "Reading git-diff-tree failed");
7540                         @difftree
7541                                 or die_error(404, "Blob diff not found");
7542
7543                 } else {
7544                         die_error(400, "Missing one of the blob diff parameters");
7545                 }
7546
7547                 if (@difftree > 1) {
7548                         die_error(400, "Ambiguous blob diff specification");
7549                 }
7550
7551                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7552                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7553                 $file_name   ||= $diffinfo{'to_file'};
7554
7555                 $hash_parent ||= $diffinfo{'from_id'};
7556                 $hash        ||= $diffinfo{'to_id'};
7557
7558                 # non-textual hash id's can be cached
7559                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7560                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7561                         $expires = '+1d';
7562                 }
7563
7564                 # open patch output
7565                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7566                         '-p', ($format eq 'html' ? "--full-index" : ()),
7567                         $hash_parent_base, $hash_base,
7568                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7569                         or die_error(500, "Open git-diff-tree failed");
7570         }
7571
7572         # old/legacy style URI -- not generated anymore since 1.4.3.
7573         if (!%diffinfo) {
7574                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7575         }
7576
7577         # header
7578         if ($format eq 'html') {
7579                 my $formats_nav =
7580                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7581                                 "raw");
7582                 $formats_nav .= diff_style_nav($diff_style);
7583                 git_header_html(undef, $expires);
7584                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7585                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7586                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7587                 } else {
7588                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7589                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7590                 }
7591                 if (defined $file_name) {
7592                         git_print_page_path($file_name, "blob", $hash_base);
7593                 } else {
7594                         print "<div class=\"page_path\"></div>\n";
7595                 }
7596
7597         } elsif ($format eq 'plain') {
7598                 print $cgi->header(
7599                         -type => 'text/plain',
7600                         -charset => 'utf-8',
7601                         -expires => $expires,
7602                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7603
7604                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7605
7606         } else {
7607                 die_error(400, "Unknown blobdiff format");
7608         }
7609
7610         # patch
7611         if ($format eq 'html') {
7612                 print "<div class=\"page_body\">\n";
7613
7614                 git_patchset_body($fd, $diff_style,
7615                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7616                 close $fd;
7617
7618                 print "</div>\n"; # class="page_body"
7619                 git_footer_html();
7620
7621         } else {
7622                 while (my $line = <$fd>) {
7623                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7624                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7625
7626                         print $line;
7627
7628                         last if $line =~ m!^\+\+\+!;
7629                 }
7630                 local $/ = undef;
7631                 print <$fd>;
7632                 close $fd;
7633         }
7634 }
7635
7636 sub git_blobdiff_plain {
7637         git_blobdiff('plain');
7638 }
7639
7640 # assumes that it is added as later part of already existing navigation,
7641 # so it returns "| foo | bar" rather than just "foo | bar"
7642 sub diff_style_nav {
7643         my ($diff_style, $is_combined) = @_;
7644         $diff_style ||= 'inline';
7645
7646         return "" if ($is_combined);
7647
7648         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7649         my %styles = @styles;
7650         @styles =
7651                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7652
7653         return join '',
7654                 map { " | ".$_ }
7655                 map {
7656                         $_ eq $diff_style ? $styles{$_} :
7657                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7658                 } @styles;
7659 }
7660
7661 sub git_commitdiff {
7662         my %params = @_;
7663         my $format = $params{-format} || 'html';
7664         my $diff_style = $input_params{'diff_style'} || 'inline';
7665
7666         my ($patch_max) = gitweb_get_feature('patches');
7667         if ($format eq 'patch') {
7668                 die_error(403, "Patch view not allowed") unless $patch_max;
7669         }
7670
7671         $hash ||= $hash_base || "HEAD";
7672         my %co = parse_commit($hash)
7673             or die_error(404, "Unknown commit object");
7674
7675         # choose format for commitdiff for merge
7676         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7677                 $hash_parent = '--cc';
7678         }
7679         # we need to prepare $formats_nav before almost any parameter munging
7680         my $formats_nav;
7681         if ($format eq 'html') {
7682                 $formats_nav =
7683                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7684                                 "raw");
7685                 if ($patch_max && @{$co{'parents'}} <= 1) {
7686                         $formats_nav .= " | " .
7687                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7688                                         "patch");
7689                 }
7690                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7691
7692                 if (defined $hash_parent &&
7693                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7694                         # commitdiff with two commits given
7695                         my $hash_parent_short = $hash_parent;
7696                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7697                                 $hash_parent_short = substr($hash_parent, 0, 7);
7698                         }
7699                         $formats_nav .=
7700                                 ' (from';
7701                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7702                                 if ($co{'parents'}[$i] eq $hash_parent) {
7703                                         $formats_nav .= ' parent ' . ($i+1);
7704                                         last;
7705                                 }
7706                         }
7707                         $formats_nav .= ': ' .
7708                                 $cgi->a({-href => href(-replay=>1,
7709                                                        hash=>$hash_parent, hash_base=>undef)},
7710                                         esc_html($hash_parent_short)) .
7711                                 ')';
7712                 } elsif (!$co{'parent'}) {
7713                         # --root commitdiff
7714                         $formats_nav .= ' (initial)';
7715                 } elsif (scalar @{$co{'parents'}} == 1) {
7716                         # single parent commit
7717                         $formats_nav .=
7718                                 ' (parent: ' .
7719                                 $cgi->a({-href => href(-replay=>1,
7720                                                        hash=>$co{'parent'}, hash_base=>undef)},
7721                                         esc_html(substr($co{'parent'}, 0, 7))) .
7722                                 ')';
7723                 } else {
7724                         # merge commit
7725                         if ($hash_parent eq '--cc') {
7726                                 $formats_nav .= ' | ' .
7727                                         $cgi->a({-href => href(-replay=>1,
7728                                                                hash=>$hash, hash_parent=>'-c')},
7729                                                 'combined');
7730                         } else { # $hash_parent eq '-c'
7731                                 $formats_nav .= ' | ' .
7732                                         $cgi->a({-href => href(-replay=>1,
7733                                                                hash=>$hash, hash_parent=>'--cc')},
7734                                                 'compact');
7735                         }
7736                         $formats_nav .=
7737                                 ' (merge: ' .
7738                                 join(' ', map {
7739                                         $cgi->a({-href => href(-replay=>1,
7740                                                                hash=>$_, hash_base=>undef)},
7741                                                 esc_html(substr($_, 0, 7)));
7742                                 } @{$co{'parents'}} ) .
7743                                 ')';
7744                 }
7745         }
7746
7747         my $hash_parent_param = $hash_parent;
7748         if (!defined $hash_parent_param) {
7749                 # --cc for multiple parents, --root for parentless
7750                 $hash_parent_param =
7751                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7752         }
7753
7754         # read commitdiff
7755         my $fd;
7756         my @difftree;
7757         if ($format eq 'html') {
7758                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7759                         "--no-commit-id", "--patch-with-raw", "--full-index",
7760                         $hash_parent_param, $hash, "--"
7761                         or die_error(500, "Open git-diff-tree failed");
7762
7763                 while (my $line = <$fd>) {
7764                         chomp $line;
7765                         # empty line ends raw part of diff-tree output
7766                         last unless $line;
7767                         push @difftree, scalar parse_difftree_raw_line($line);
7768                 }
7769
7770         } elsif ($format eq 'plain') {
7771                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7772                         '-p', $hash_parent_param, $hash, "--"
7773                         or die_error(500, "Open git-diff-tree failed");
7774         } elsif ($format eq 'patch') {
7775                 # For commit ranges, we limit the output to the number of
7776                 # patches specified in the 'patches' feature.
7777                 # For single commits, we limit the output to a single patch,
7778                 # diverging from the git-format-patch default.
7779                 my @commit_spec = ();
7780                 if ($hash_parent) {
7781                         if ($patch_max > 0) {
7782                                 push @commit_spec, "-$patch_max";
7783                         }
7784                         push @commit_spec, '-n', "$hash_parent..$hash";
7785                 } else {
7786                         if ($params{-single}) {
7787                                 push @commit_spec, '-1';
7788                         } else {
7789                                 if ($patch_max > 0) {
7790                                         push @commit_spec, "-$patch_max";
7791                                 }
7792                                 push @commit_spec, "-n";
7793                         }
7794                         push @commit_spec, '--root', $hash;
7795                 }
7796                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7797                         '--encoding=utf8', '--stdout', @commit_spec
7798                         or die_error(500, "Open git-format-patch failed");
7799         } else {
7800                 die_error(400, "Unknown commitdiff format");
7801         }
7802
7803         # non-textual hash id's can be cached
7804         my $expires;
7805         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7806                 $expires = "+1d";
7807         }
7808
7809         # write commit message
7810         if ($format eq 'html') {
7811                 my $refs = git_get_references();
7812                 my $ref = format_ref_marker($refs, $co{'id'});
7813
7814                 git_header_html(undef, $expires);
7815                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7816                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7817                 print "<div class=\"title_text\">\n" .
7818                       "<table class=\"object_header\">\n";
7819                 git_print_authorship_rows(\%co);
7820                 print "</table>".
7821                       "</div>\n";
7822                 print "<div class=\"page_body\">\n";
7823                 if (@{$co{'comment'}} > 1) {
7824                         print "<div class=\"log\">\n";
7825                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7826                         print "</div>\n"; # class="log"
7827                 }
7828
7829         } elsif ($format eq 'plain') {
7830                 my $refs = git_get_references("tags");
7831                 my $tagname = git_get_rev_name_tags($hash);
7832                 my $filename = basename($project) . "-$hash.patch";
7833
7834                 print $cgi->header(
7835                         -type => 'text/plain',
7836                         -charset => 'utf-8',
7837                         -expires => $expires,
7838                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7839                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7840                 print "From: " . to_utf8($co{'author'}) . "\n";
7841                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7842                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7843
7844                 print "X-Git-Tag: $tagname\n" if $tagname;
7845                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7846
7847                 foreach my $line (@{$co{'comment'}}) {
7848                         print to_utf8($line) . "\n";
7849                 }
7850                 print "---\n\n";
7851         } elsif ($format eq 'patch') {
7852                 my $filename = basename($project) . "-$hash.patch";
7853
7854                 print $cgi->header(
7855                         -type => 'text/plain',
7856                         -charset => 'utf-8',
7857                         -expires => $expires,
7858                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7859         }
7860
7861         # write patch
7862         if ($format eq 'html') {
7863                 my $use_parents = !defined $hash_parent ||
7864                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7865                 git_difftree_body(\@difftree, $hash,
7866                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7867                 print "<br/>\n";
7868
7869                 git_patchset_body($fd, $diff_style,
7870                                   \@difftree, $hash,
7871                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7872                 close $fd;
7873                 print "</div>\n"; # class="page_body"
7874                 git_footer_html();
7875
7876         } elsif ($format eq 'plain') {
7877                 local $/ = undef;
7878                 print <$fd>;
7879                 close $fd
7880                         or print "Reading git-diff-tree failed\n";
7881         } elsif ($format eq 'patch') {
7882                 local $/ = undef;
7883                 print <$fd>;
7884                 close $fd
7885                         or print "Reading git-format-patch failed\n";
7886         }
7887 }
7888
7889 sub git_commitdiff_plain {
7890         git_commitdiff(-format => 'plain');
7891 }
7892
7893 # format-patch-style patches
7894 sub git_patch {
7895         git_commitdiff(-format => 'patch', -single => 1);
7896 }
7897
7898 sub git_patches {
7899         git_commitdiff(-format => 'patch');
7900 }
7901
7902 sub git_history {
7903         git_log_generic('history', \&git_history_body,
7904                         $hash_base, $hash_parent_base,
7905                         $file_name, $hash);
7906 }
7907
7908 sub git_search {
7909         $searchtype ||= 'commit';
7910
7911         # check if appropriate features are enabled
7912         gitweb_check_feature('search')
7913                 or die_error(403, "Search is disabled");
7914         if ($searchtype eq 'pickaxe') {
7915                 # pickaxe may take all resources of your box and run for several minutes
7916                 # with every query - so decide by yourself how public you make this feature
7917                 gitweb_check_feature('pickaxe')
7918                         or die_error(403, "Pickaxe search is disabled");
7919         }
7920         if ($searchtype eq 'grep') {
7921                 # grep search might be potentially CPU-intensive, too
7922                 gitweb_check_feature('grep')
7923                         or die_error(403, "Grep search is disabled");
7924         }
7925
7926         if (!defined $searchtext) {
7927                 die_error(400, "Text field is empty");
7928         }
7929         if (!defined $hash) {
7930                 $hash = git_get_head_hash($project);
7931         }
7932         my %co = parse_commit($hash);
7933         if (!%co) {
7934                 die_error(404, "Unknown commit object");
7935         }
7936         if (!defined $page) {
7937                 $page = 0;
7938         }
7939
7940         if ($searchtype eq 'commit' ||
7941             $searchtype eq 'author' ||
7942             $searchtype eq 'committer') {
7943                 git_search_message(%co);
7944         } elsif ($searchtype eq 'pickaxe') {
7945                 git_search_changes(%co);
7946         } elsif ($searchtype eq 'grep') {
7947                 git_search_files(%co);
7948         } else {
7949                 die_error(400, "Unknown search type");
7950         }
7951 }
7952
7953 sub git_search_help {
7954         git_header_html();
7955         git_print_page_nav('','', $hash,$hash,$hash);
7956         print <<EOT;
7957 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7958 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7959 the pattern entered is recognized as the POSIX extended
7960 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7961 insensitive).</p>
7962 <dl>
7963 <dt><b>commit</b></dt>
7964 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7965 EOT
7966         my $have_grep = gitweb_check_feature('grep');
7967         if ($have_grep) {
7968                 print <<EOT;
7969 <dt><b>grep</b></dt>
7970 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7971     a different one) are searched for the given pattern. On large trees, this search can take
7972 a while and put some strain on the server, so please use it with some consideration. Note that
7973 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7974 case-sensitive.</dd>
7975 EOT
7976         }
7977         print <<EOT;
7978 <dt><b>author</b></dt>
7979 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7980 <dt><b>committer</b></dt>
7981 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7982 EOT
7983         my $have_pickaxe = gitweb_check_feature('pickaxe');
7984         if ($have_pickaxe) {
7985                 print <<EOT;
7986 <dt><b>pickaxe</b></dt>
7987 <dd>All commits that caused the string to appear or disappear from any file (changes that
7988 added, removed or "modified" the string) will be listed. This search can take a while and
7989 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7990 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7991 EOT
7992         }
7993         print "</dl>\n";
7994         git_footer_html();
7995 }
7996
7997 sub git_shortlog {
7998         git_log_generic('shortlog', \&git_shortlog_body,
7999                         $hash, $hash_parent);
8000 }
8001
8002 ## ......................................................................
8003 ## feeds (RSS, Atom; OPML)
8004
8005 sub git_feed {
8006         my $format = shift || 'atom';
8007         my $have_blame = gitweb_check_feature('blame');
8008
8009         # Atom: http://www.atomenabled.org/developers/syndication/
8010         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8011         if ($format ne 'rss' && $format ne 'atom') {
8012                 die_error(400, "Unknown web feed format");
8013         }
8014
8015         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8016         my $head = $hash || 'HEAD';
8017         my @commitlist = parse_commits($head, 150, 0, $file_name);
8018
8019         my %latest_commit;
8020         my %latest_date;
8021         my $content_type = "application/$format+xml";
8022         if (defined $cgi->http('HTTP_ACCEPT') &&
8023                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8024                 # browser (feed reader) prefers text/xml
8025                 $content_type = 'text/xml';
8026         }
8027         if (defined($commitlist[0])) {
8028                 %latest_commit = %{$commitlist[0]};
8029                 my $latest_epoch = $latest_commit{'committer_epoch'};
8030                 exit_if_unmodified_since($latest_epoch);
8031                 %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8032         }
8033         print $cgi->header(
8034                 -type => $content_type,
8035                 -charset => 'utf-8',
8036                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8037                 -status => '200 OK');
8038
8039         # Optimization: skip generating the body if client asks only
8040         # for Last-Modified date.
8041         return if ($cgi->request_method() eq 'HEAD');
8042
8043         # header variables
8044         my $title = "$site_name - $project/$action";
8045         my $feed_type = 'log';
8046         if (defined $hash) {
8047                 $title .= " - '$hash'";
8048                 $feed_type = 'branch log';
8049                 if (defined $file_name) {
8050                         $title .= " :: $file_name";
8051                         $feed_type = 'history';
8052                 }
8053         } elsif (defined $file_name) {
8054                 $title .= " - $file_name";
8055                 $feed_type = 'history';
8056         }
8057         $title .= " $feed_type";
8058         my $descr = git_get_project_description($project);
8059         if (defined $descr) {
8060                 $descr = esc_html($descr);
8061         } else {
8062                 $descr = "$project " .
8063                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8064                          " feed";
8065         }
8066         my $owner = git_get_project_owner($project);
8067         $owner = esc_html($owner);
8068
8069         #header
8070         my $alt_url;
8071         if (defined $file_name) {
8072                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8073         } elsif (defined $hash) {
8074                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8075         } else {
8076                 $alt_url = href(-full=>1, action=>"summary");
8077         }
8078         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8079         if ($format eq 'rss') {
8080                 print <<XML;
8081 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8082 <channel>
8083 XML
8084                 print "<title>$title</title>\n" .
8085                       "<link>$alt_url</link>\n" .
8086                       "<description>$descr</description>\n" .
8087                       "<language>en</language>\n" .
8088                       # project owner is responsible for 'editorial' content
8089                       "<managingEditor>$owner</managingEditor>\n";
8090                 if (defined $logo || defined $favicon) {
8091                         # prefer the logo to the favicon, since RSS
8092                         # doesn't allow both
8093                         my $img = esc_url($logo || $favicon);
8094                         print "<image>\n" .
8095                               "<url>$img</url>\n" .
8096                               "<title>$title</title>\n" .
8097                               "<link>$alt_url</link>\n" .
8098                               "</image>\n";
8099                 }
8100                 if (%latest_date) {
8101                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8102                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8103                 }
8104                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8105         } elsif ($format eq 'atom') {
8106                 print <<XML;
8107 <feed xmlns="http://www.w3.org/2005/Atom">
8108 XML
8109                 print "<title>$title</title>\n" .
8110                       "<subtitle>$descr</subtitle>\n" .
8111                       '<link rel="alternate" type="text/html" href="' .
8112                       $alt_url . '" />' . "\n" .
8113                       '<link rel="self" type="' . $content_type . '" href="' .
8114                       $cgi->self_url() . '" />' . "\n" .
8115                       "<id>" . href(-full=>1) . "</id>\n" .
8116                       # use project owner for feed author
8117                       "<author><name>$owner</name></author>\n";
8118                 if (defined $favicon) {
8119                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8120                 }
8121                 if (defined $logo) {
8122                         # not twice as wide as tall: 72 x 27 pixels
8123                         print "<logo>" . esc_url($logo) . "</logo>\n";
8124                 }
8125                 if (! %latest_date) {
8126                         # dummy date to keep the feed valid until commits trickle in:
8127                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8128                 } else {
8129                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8130                 }
8131                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8132         }
8133
8134         # contents
8135         for (my $i = 0; $i <= $#commitlist; $i++) {
8136                 my %co = %{$commitlist[$i]};
8137                 my $commit = $co{'id'};
8138                 # we read 150, we always show 30 and the ones more recent than 48 hours
8139                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8140                         last;
8141                 }
8142                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8143
8144                 # get list of changed files
8145                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8146                         $co{'parent'} || "--root",
8147                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8148                         or next;
8149                 my @difftree = map { chomp; $_ } <$fd>;
8150                 close $fd
8151                         or next;
8152
8153                 # print element (entry, item)
8154                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8155                 if ($format eq 'rss') {
8156                         print "<item>\n" .
8157                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8158                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8159                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8160                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8161                               "<link>$co_url</link>\n" .
8162                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8163                               "<content:encoded>" .
8164                               "<![CDATA[\n";
8165                 } elsif ($format eq 'atom') {
8166                         print "<entry>\n" .
8167                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8168                               "<updated>$cd{'iso-8601'}</updated>\n" .
8169                               "<author>\n" .
8170                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8171                         if ($co{'author_email'}) {
8172                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8173                         }
8174                         print "</author>\n" .
8175                               # use committer for contributor
8176                               "<contributor>\n" .
8177                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8178                         if ($co{'committer_email'}) {
8179                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8180                         }
8181                         print "</contributor>\n" .
8182                               "<published>$cd{'iso-8601'}</published>\n" .
8183                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8184                               "<id>$co_url</id>\n" .
8185                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8186                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8187                 }
8188                 my $comment = $co{'comment'};
8189                 print "<pre>\n";
8190                 foreach my $line (@$comment) {
8191                         $line = esc_html($line);
8192                         print "$line\n";
8193                 }
8194                 print "</pre><ul>\n";
8195                 foreach my $difftree_line (@difftree) {
8196                         my %difftree = parse_difftree_raw_line($difftree_line);
8197                         next if !$difftree{'from_id'};
8198
8199                         my $file = $difftree{'file'} || $difftree{'to_file'};
8200
8201                         print "<li>" .
8202                               "[" .
8203                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8204                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8205                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8206                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8207                                       -title => "diff"}, 'D');
8208                         if ($have_blame) {
8209                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8210                                                              file_name=>$file, hash_base=>$commit),
8211                                               -title => "blame"}, 'B');
8212                         }
8213                         # if this is not a feed of a file history
8214                         if (!defined $file_name || $file_name ne $file) {
8215                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8216                                                              file_name=>$file, hash=>$commit),
8217                                               -title => "history"}, 'H');
8218                         }
8219                         $file = esc_path($file);
8220                         print "] ".
8221                               "$file</li>\n";
8222                 }
8223                 if ($format eq 'rss') {
8224                         print "</ul>]]>\n" .
8225                               "</content:encoded>\n" .
8226                               "</item>\n";
8227                 } elsif ($format eq 'atom') {
8228                         print "</ul>\n</div>\n" .
8229                               "</content>\n" .
8230                               "</entry>\n";
8231                 }
8232         }
8233
8234         # end of feed
8235         if ($format eq 'rss') {
8236                 print "</channel>\n</rss>\n";
8237         } elsif ($format eq 'atom') {
8238                 print "</feed>\n";
8239         }
8240 }
8241
8242 sub git_rss {
8243         git_feed('rss');
8244 }
8245
8246 sub git_atom {
8247         git_feed('atom');
8248 }
8249
8250 sub git_opml {
8251         my @list = git_get_projects_list($project_filter, $strict_export);
8252         if (!@list) {
8253                 die_error(404, "No projects found");
8254         }
8255
8256         print $cgi->header(
8257                 -type => 'text/xml',
8258                 -charset => 'utf-8',
8259                 -content_disposition => 'inline; filename="opml.xml"');
8260
8261         my $title = esc_html($site_name);
8262         my $filter = " within subdirectory ";
8263         if (defined $project_filter) {
8264                 $filter .= esc_html($project_filter);
8265         } else {
8266                 $filter = "";
8267         }
8268         print <<XML;
8269 <?xml version="1.0" encoding="utf-8"?>
8270 <opml version="1.0">
8271 <head>
8272   <title>$title OPML Export$filter</title>
8273 </head>
8274 <body>
8275 <outline text="git RSS feeds">
8276 XML
8277
8278         foreach my $pr (@list) {
8279                 my %proj = %$pr;
8280                 my $head = git_get_head_hash($proj{'path'});
8281                 if (!defined $head) {
8282                         next;
8283                 }
8284                 $git_dir = "$projectroot/$proj{'path'}";
8285                 my %co = parse_commit($head);
8286                 if (!%co) {
8287                         next;
8288                 }
8289
8290                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8291                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8292                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8293                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8294         }
8295         print <<XML;
8296 </outline>
8297 </body>
8298 </opml>
8299 XML
8300 }