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         # $feature{'remote_heads'}{'override'} = 1;
 544         # and in project config gitweb.remoteheads = 0|1;
 545         'remote_heads' => {
 546                 'sub' => sub { feature_bool('remote_heads', @_) },
 547                 'override' => 0,
 548                 'default' => [0]},
 549 );
 550
 551 sub gitweb_get_feature {
 552         my ($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                 $lo =~ s/_//g;
2701                 $key = join(".", lc($hi), $mi, lc($lo));
2702                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2703         } else {
2704                 $key = lc($key);
2705                 $key =~ s/_//g;
2706                 return if ($key =~ /\W/);
2707         }
2708         $key =~ s/^gitweb\.//;
2709
2710         # type sanity check
2711         if (defined $type) {
2712                 $type =~ s/^--//;
2713                 $type = undef
2714                         unless ($type eq 'bool' || $type eq 'int');
2715         }
2716
2717         # get config
2718         if (!defined $config_file ||
2719             $config_file ne "$git_dir/config") {
2720                 %config = git_parse_project_config('gitweb');
2721                 $config_file = "$git_dir/config";
2722         }
2723
2724         # check if config variable (key) exists
2725         return unless exists $config{"gitweb.$key"};
2726
2727         # ensure given type
2728         if (!defined $type) {
2729                 return $config{"gitweb.$key"};
2730         } elsif ($type eq 'bool') {
2731                 # backward compatibility: 'git config --bool' returns true/false
2732                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2733         } elsif ($type eq 'int') {
2734                 return config_to_int($config{"gitweb.$key"});
2735         }
2736         return $config{"gitweb.$key"};
2737 }
2738
2739 # get hash of given path at given ref
2740 sub git_get_hash_by_path {
2741         my $base = shift;
2742         my $path = shift || return undef;
2743         my $type = shift;
2744
2745         $path =~ s,/+$,,;
2746
2747         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2748                 or die_error(500, "Open git-ls-tree failed");
2749         my $line = <$fd>;
2750         close $fd or return undef;
2751
2752         if (!defined $line) {
2753                 # there is no tree or hash given by $path at $base
2754                 return undef;
2755         }
2756
2757         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2758         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2759         if (defined $type && $type ne $2) {
2760                 # type doesn't match
2761                 return undef;
2762         }
2763         return $3;
2764 }
2765
2766 # get path of entry with given hash at given tree-ish (ref)
2767 # used to get 'from' filename for combined diff (merge commit) for renames
2768 sub git_get_path_by_hash {
2769         my $base = shift || return;
2770         my $hash = shift || return;
2771
2772         local $/ = "\0";
2773
2774         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2775                 or return undef;
2776         while (my $line = <$fd>) {
2777                 chomp $line;
2778
2779                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2780                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2781                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2782                         close $fd;
2783                         return $1;
2784                 }
2785         }
2786         close $fd;
2787         return undef;
2788 }
2789
2790 ## ......................................................................
2791 ## git utility functions, directly accessing git repository
2792
2793 # get the value of config variable either from file named as the variable
2794 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2795 # configuration variable in the repository config file.
2796 sub git_get_file_or_project_config {
2797         my ($path, $name) = @_;
2798
2799         $git_dir = "$projectroot/$path";
2800         open my $fd, '<', "$git_dir/$name"
2801                 or return git_get_project_config($name);
2802         my $conf = <$fd>;
2803         close $fd;
2804         if (defined $conf) {
2805                 chomp $conf;
2806         }
2807         return $conf;
2808 }
2809
2810 sub git_get_project_description {
2811         my $path = shift;
2812         return git_get_file_or_project_config($path, 'description');
2813 }
2814
2815 sub git_get_project_category {
2816         my $path = shift;
2817         return git_get_file_or_project_config($path, 'category');
2818 }
2819
2820
2821 # supported formats:
2822 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2823 #   - if its contents is a number, use it as tag weight,
2824 #   - otherwise add a tag with weight 1
2825 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2826 #   the same value multiple times increases tag weight
2827 # * `gitweb.ctag' multi-valued repo config variable
2828 sub git_get_project_ctags {
2829         my $project = shift;
2830         my $ctags = {};
2831
2832         $git_dir = "$projectroot/$project";
2833         if (opendir my $dh, "$git_dir/ctags") {
2834                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2835                 foreach my $tagfile (@files) {
2836                         open my $ct, '<', $tagfile
2837                                 or next;
2838                         my $val = <$ct>;
2839                         chomp $val if $val;
2840                         close $ct;
2841
2842                         (my $ctag = $tagfile) =~ s#.*/##;
2843                         if ($val =~ /^\d+$/) {
2844                                 $ctags->{$ctag} = $val;
2845                         } else {
2846                                 $ctags->{$ctag} = 1;
2847                         }
2848                 }
2849                 closedir $dh;
2850
2851         } elsif (open my $fh, '<', "$git_dir/ctags") {
2852                 while (my $line = <$fh>) {
2853                         chomp $line;
2854                         $ctags->{$line}++ if $line;
2855                 }
2856                 close $fh;
2857
2858         } else {
2859                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2860                 foreach my $tag (@$taglist) {
2861                         $ctags->{$tag}++;
2862                 }
2863         }
2864
2865         return $ctags;
2866 }
2867
2868 # return hash, where keys are content tags ('ctags'),
2869 # and values are sum of weights of given tag in every project
2870 sub git_gather_all_ctags {
2871         my $projects = shift;
2872         my $ctags = {};
2873
2874         foreach my $p (@$projects) {
2875                 foreach my $ct (keys %{$p->{'ctags'}}) {
2876                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2877                 }
2878         }
2879
2880         return $ctags;
2881 }
2882
2883 sub git_populate_project_tagcloud {
2884         my $ctags = shift;
2885
2886         # First, merge different-cased tags; tags vote on casing
2887         my %ctags_lc;
2888         foreach (keys %$ctags) {
2889                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2890                 if (not $ctags_lc{lc $_}->{topcount}
2891                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2892                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2893                         $ctags_lc{lc $_}->{topname} = $_;
2894                 }
2895         }
2896
2897         my $cloud;
2898         my $matched = $input_params{'ctag'};
2899         if (eval { require HTML::TagCloud; 1; }) {
2900                 $cloud = HTML::TagCloud->new;
2901                 foreach my $ctag (sort keys %ctags_lc) {
2902                         # Pad the title with spaces so that the cloud looks
2903                         # less crammed.
2904                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2905                         $title =~ s/ /&nbsp;/g;
2906                         $title =~ s/^/&nbsp;/g;
2907                         $title =~ s/$/&nbsp;/g;
2908                         if (defined $matched && $matched eq $ctag) {
2909                                 $title = qq(<span class="match">$title</span>);
2910                         }
2911                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2912                                     $ctags_lc{$ctag}->{count});
2913                 }
2914         } else {
2915                 $cloud = {};
2916                 foreach my $ctag (keys %ctags_lc) {
2917                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2918                         if (defined $matched && $matched eq $ctag) {
2919                                 $title = qq(<span class="match">$title</span>);
2920                         }
2921                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2922                         $cloud->{$ctag}{ctag} =
2923                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2924                 }
2925         }
2926         return $cloud;
2927 }
2928
2929 sub git_show_project_tagcloud {
2930         my ($cloud, $count) = @_;
2931         if (ref $cloud eq 'HTML::TagCloud') {
2932                 return $cloud->html_and_css($count);
2933         } else {
2934                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2935                 return
2936                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2937                         join (', ', map {
2938                                 $cloud->{$_}->{'ctag'}
2939                         } splice(@tags, 0, $count)) .
2940                         '</div>';
2941         }
2942 }
2943
2944 sub git_get_project_url_list {
2945         my $path = shift;
2946
2947         $git_dir = "$projectroot/$path";
2948         open my $fd, '<', "$git_dir/cloneurl"
2949                 or return wantarray ?
2950                 @{ config_to_multi(git_get_project_config('url')) } :
2951                    config_to_multi(git_get_project_config('url'));
2952         my @git_project_url_list = map { chomp; $_ } <$fd>;
2953         close $fd;
2954
2955         return wantarray ? @git_project_url_list : \@git_project_url_list;
2956 }
2957
2958 sub git_get_projects_list {
2959         my $filter = shift || '';
2960         my $paranoid = shift;
2961         my @list;
2962
2963         if (-d $projects_list) {
2964                 # search in directory
2965                 my $dir = $projects_list;
2966                 # remove the trailing "/"
2967                 $dir =~ s!/+$!!;
2968                 my $pfxlen = length("$dir");
2969                 my $pfxdepth = ($dir =~ tr!/!!);
2970                 # when filtering, search only given subdirectory
2971                 if ($filter && !$paranoid) {
2972                         $dir .= "/$filter";
2973                         $dir =~ s!/+$!!;
2974                 }
2975
2976                 File::Find::find({
2977                         follow_fast => 1, # follow symbolic links
2978                         follow_skip => 2, # ignore duplicates
2979                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2980                         wanted => sub {
2981                                 # global variables
2982                                 our $project_maxdepth;
2983                                 our $projectroot;
2984                                 # skip project-list toplevel, if we get it.
2985                                 return if (m!^[/.]$!);
2986                                 # only directories can be git repositories
2987                                 return unless (-d $_);
2988                                 # don't traverse too deep (Find is super slow on os x)
2989                                 # $project_maxdepth excludes depth of $projectroot
2990                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2991                                         $File::Find::prune = 1;
2992                                         return;
2993                                 }
2994
2995                                 my $path = substr($File::Find::name, $pfxlen + 1);
2996                                 # paranoidly only filter here
2997                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2998                                         next;
2999                                 }
3000                                 # we check related file in $projectroot
3001                                 if (check_export_ok("$projectroot/$path")) {
3002                                         push @list, { path => $path };
3003                                         $File::Find::prune = 1;
3004                                 }
3005                         },
3006                 }, "$dir");
3007
3008         } elsif (-f $projects_list) {
3009                 # read from file(url-encoded):
3010                 # 'git%2Fgit.git Linus+Torvalds'
3011                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3012                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3013                 open my $fd, '<', $projects_list or return;
3014         PROJECT:
3015                 while (my $line = <$fd>) {
3016                         chomp $line;
3017                         my ($path, $owner) = split ' ', $line;
3018                         $path = unescape($path);
3019                         $owner = unescape($owner);
3020                         if (!defined $path) {
3021                                 next;
3022                         }
3023                         # if $filter is rpovided, check if $path begins with $filter
3024                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3025                                 next;
3026                         }
3027                         if (check_export_ok("$projectroot/$path")) {
3028                                 my $pr = {
3029                                         path => $path
3030                                 };
3031                                 if ($owner) {
3032                                         $pr->{'owner'} = to_utf8($owner);
3033                                 }
3034                                 push @list, $pr;
3035                         }
3036                 }
3037                 close $fd;
3038         }
3039         return @list;
3040 }
3041
3042 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3043 # as side effects it sets 'forks' field to list of forks for forked projects
3044 sub filter_forks_from_projects_list {
3045         my $projects = shift;
3046
3047         my %trie; # prefix tree of directories (path components)
3048         # generate trie out of those directories that might contain forks
3049         foreach my $pr (@$projects) {
3050                 my $path = $pr->{'path'};
3051                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3052                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3053                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3054                 next unless (-d "$projectroot/$path"); # containing directory exists
3055                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3056
3057                 # add to trie
3058                 my @dirs = split('/', $path);
3059                 # walk the trie, until either runs out of components or out of trie
3060                 my $ref = \%trie;
3061                 while (scalar @dirs &&
3062                        exists($ref->{$dirs[0]})) {
3063                         $ref = $ref->{shift @dirs};
3064                 }
3065                 # create rest of trie structure from rest of components
3066                 foreach my $dir (@dirs) {
3067                         $ref = $ref->{$dir} = {};
3068                 }
3069                 # create end marker, store $pr as a data
3070                 $ref->{''} = $pr if (!exists $ref->{''});
3071         }
3072
3073         # filter out forks, by finding shortest prefix match for paths
3074         my @filtered;
3075  PROJECT:
3076         foreach my $pr (@$projects) {
3077                 # trie lookup
3078                 my $ref = \%trie;
3079         DIR:
3080                 foreach my $dir (split('/', $pr->{'path'})) {
3081                         if (exists $ref->{''}) {
3082                                 # found [shortest] prefix, is a fork - skip it
3083                                 push @{$ref->{''}{'forks'}}, $pr;
3084                                 next PROJECT;
3085                         }
3086                         if (!exists $ref->{$dir}) {
3087                                 # not in trie, cannot have prefix, not a fork
3088                                 push @filtered, $pr;
3089                                 next PROJECT;
3090                         }
3091                         # If the dir is there, we just walk one step down the trie.
3092                         $ref = $ref->{$dir};
3093                 }
3094                 # we ran out of trie
3095                 # (shouldn't happen: it's either no match, or end marker)
3096                 push @filtered, $pr;
3097         }
3098
3099         return @filtered;
3100 }
3101
3102 # note: fill_project_list_info must be run first,
3103 # for 'descr_long' and 'ctags' to be filled
3104 sub search_projects_list {
3105         my ($projlist, %opts) = @_;
3106         my $tagfilter  = $opts{'tagfilter'};
3107         my $search_re = $opts{'search_regexp'};
3108
3109         return @$projlist
3110                 unless ($tagfilter || $search_re);
3111
3112         # searching projects require filling to be run before it;
3113         fill_project_list_info($projlist,
3114                                $tagfilter  ? 'ctags' : (),
3115                                $search_re ? ('path', 'descr') : ());
3116         my @projects;
3117  PROJECT:
3118         foreach my $pr (@$projlist) {
3119
3120                 if ($tagfilter) {
3121                         next unless ref($pr->{'ctags'}) eq 'HASH';
3122                         next unless
3123                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3124                 }
3125
3126                 if ($search_re) {
3127                         next unless
3128                                 $pr->{'path'} =~ /$search_re/ ||
3129                                 $pr->{'descr_long'} =~ /$search_re/;
3130                 }
3131
3132                 push @projects, $pr;
3133         }
3134
3135         return @projects;
3136 }
3137
3138 our $gitweb_project_owner = undef;
3139 sub git_get_project_list_from_file {
3140
3141         return if (defined $gitweb_project_owner);
3142
3143         $gitweb_project_owner = {};
3144         # read from file (url-encoded):
3145         # 'git%2Fgit.git Linus+Torvalds'
3146         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3147         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3148         if (-f $projects_list) {
3149                 open(my $fd, '<', $projects_list);
3150                 while (my $line = <$fd>) {
3151                         chomp $line;
3152                         my ($pr, $ow) = split ' ', $line;
3153                         $pr = unescape($pr);
3154                         $ow = unescape($ow);
3155                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3156                 }
3157                 close $fd;
3158         }
3159 }
3160
3161 sub git_get_project_owner {
3162         my $project = shift;
3163         my $owner;
3164
3165         return undef unless $project;
3166         $git_dir = "$projectroot/$project";
3167
3168         if (!defined $gitweb_project_owner) {
3169                 git_get_project_list_from_file();
3170         }
3171
3172         if (exists $gitweb_project_owner->{$project}) {
3173                 $owner = $gitweb_project_owner->{$project};
3174         }
3175         if (!defined $owner){
3176                 $owner = git_get_project_config('owner');
3177         }
3178         if (!defined $owner) {
3179                 $owner = get_file_owner("$git_dir");
3180         }
3181
3182         return $owner;
3183 }
3184
3185 sub git_get_last_activity {
3186         my ($path) = @_;
3187         my $fd;
3188
3189         $git_dir = "$projectroot/$path";
3190         open($fd, "-|", git_cmd(), 'for-each-ref',
3191              '--format=%(committer)',
3192              '--sort=-committerdate',
3193              '--count=1',
3194              'refs/heads') or return;
3195         my $most_recent = <$fd>;
3196         close $fd or return;
3197         if (defined $most_recent &&
3198             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3199                 my $timestamp = $1;
3200                 my $age = time - $timestamp;
3201                 return ($age, age_string($age));
3202         }
3203         return (undef, undef);
3204 }
3205
3206 # Implementation note: when a single remote is wanted, we cannot use 'git
3207 # remote show -n' because that command always work (assuming it's a remote URL
3208 # if it's not defined), and we cannot use 'git remote show' because that would
3209 # try to make a network roundtrip. So the only way to find if that particular
3210 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3211 # and when we find what we want.
3212 sub git_get_remotes_list {
3213         my $wanted = shift;
3214         my %remotes = ();
3215
3216         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3217         return unless $fd;
3218         while (my $remote = <$fd>) {
3219                 chomp $remote;
3220                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3221                 next if $wanted and not $remote eq $wanted;
3222                 my ($url, $key) = ($1, $2);
3223
3224                 $remotes{$remote} ||= { 'heads' => () };
3225                 $remotes{$remote}{$key} = $url;
3226         }
3227         close $fd or return;
3228         return wantarray ? %remotes : \%remotes;
3229 }
3230
3231 # Takes a hash of remotes as first parameter and fills it by adding the
3232 # available remote heads for each of the indicated remotes.
3233 sub fill_remote_heads {
3234         my $remotes = shift;
3235         my @heads = map { "remotes/$_" } keys %$remotes;
3236         my @remoteheads = git_get_heads_list(undef, @heads);
3237         foreach my $remote (keys %$remotes) {
3238                 $remotes->{$remote}{'heads'} = [ grep {
3239                         $_->{'name'} =~ s!^$remote/!!
3240                         } @remoteheads ];
3241         }
3242 }
3243
3244 sub git_get_references {
3245         my $type = shift || "";
3246         my %refs;
3247         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3248         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3249         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3250                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3251                 or return;
3252
3253         while (my $line = <$fd>) {
3254                 chomp $line;
3255                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3256                         if (defined $refs{$1}) {
3257                                 push @{$refs{$1}}, $2;
3258                         } else {
3259                                 $refs{$1} = [ $2 ];
3260                         }
3261                 }
3262         }
3263         close $fd or return;
3264         return \%refs;
3265 }
3266
3267 sub git_get_rev_name_tags {
3268         my $hash = shift || return undef;
3269
3270         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3271                 or return;
3272         my $name_rev = <$fd>;
3273         close $fd;
3274
3275         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3276                 return $1;
3277         } else {
3278                 # catches also '$hash undefined' output
3279                 return undef;
3280         }
3281 }
3282
3283 ## ----------------------------------------------------------------------
3284 ## parse to hash functions
3285
3286 sub parse_date {
3287         my $epoch = shift;
3288         my $tz = shift || "-0000";
3289
3290         my %date;
3291         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3292         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3293         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3294         $date{'hour'} = $hour;
3295         $date{'minute'} = $min;
3296         $date{'mday'} = $mday;
3297         $date{'day'} = $days[$wday];
3298         $date{'month'} = $months[$mon];
3299         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3300                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3301         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3302                              $mday, $months[$mon], $hour ,$min;
3303         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3304                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3305
3306         my ($tz_sign, $tz_hour, $tz_min) =
3307                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3308         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3309         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3310         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3311         $date{'hour_local'} = $hour;
3312         $date{'minute_local'} = $min;
3313         $date{'tz_local'} = $tz;
3314         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3315                                   1900+$year, $mon+1, $mday,
3316                                   $hour, $min, $sec, $tz);
3317         return %date;
3318 }
3319
3320 sub parse_tag {
3321         my $tag_id = shift;
3322         my %tag;
3323         my @comment;
3324
3325         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3326         $tag{'id'} = $tag_id;
3327         while (my $line = <$fd>) {
3328                 chomp $line;
3329                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3330                         $tag{'object'} = $1;
3331                 } elsif ($line =~ m/^type (.+)$/) {
3332                         $tag{'type'} = $1;
3333                 } elsif ($line =~ m/^tag (.+)$/) {
3334                         $tag{'name'} = $1;
3335                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3336                         $tag{'author'} = $1;
3337                         $tag{'author_epoch'} = $2;
3338                         $tag{'author_tz'} = $3;
3339                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3340                                 $tag{'author_name'}  = $1;
3341                                 $tag{'author_email'} = $2;
3342                         } else {
3343                                 $tag{'author_name'} = $tag{'author'};
3344                         }
3345                 } elsif ($line =~ m/--BEGIN/) {
3346                         push @comment, $line;
3347                         last;
3348                 } elsif ($line eq "") {
3349                         last;
3350                 }
3351         }
3352         push @comment, <$fd>;
3353         $tag{'comment'} = \@comment;
3354         close $fd or return;
3355         if (!defined $tag{'name'}) {
3356                 return
3357         };
3358         return %tag
3359 }
3360
3361 sub parse_commit_text {
3362         my ($commit_text, $withparents) = @_;
3363         my @commit_lines = split '\n', $commit_text;
3364         my %co;
3365
3366         pop @commit_lines; # Remove '\0'
3367
3368         if (! @commit_lines) {
3369                 return;
3370         }
3371
3372         my $header = shift @commit_lines;
3373         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3374                 return;
3375         }
3376         ($co{'id'}, my @parents) = split ' ', $header;
3377         while (my $line = shift @commit_lines) {
3378                 last if $line eq "\n";
3379                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3380                         $co{'tree'} = $1;
3381                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3382                         push @parents, $1;
3383                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3384                         $co{'author'} = to_utf8($1);
3385                         $co{'author_epoch'} = $2;
3386                         $co{'author_tz'} = $3;
3387                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3388                                 $co{'author_name'}  = $1;
3389                                 $co{'author_email'} = $2;
3390                         } else {
3391                                 $co{'author_name'} = $co{'author'};
3392                         }
3393                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3394                         $co{'committer'} = to_utf8($1);
3395                         $co{'committer_epoch'} = $2;
3396                         $co{'committer_tz'} = $3;
3397                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3398                                 $co{'committer_name'}  = $1;
3399                                 $co{'committer_email'} = $2;
3400                         } else {
3401                                 $co{'committer_name'} = $co{'committer'};
3402                         }
3403                 }
3404         }
3405         if (!defined $co{'tree'}) {
3406                 return;
3407         };
3408         $co{'parents'} = \@parents;
3409         $co{'parent'} = $parents[0];
3410
3411         foreach my $title (@commit_lines) {
3412                 $title =~ s/^    //;
3413                 if ($title ne "") {
3414                         $co{'title'} = chop_str($title, 80, 5);
3415                         # remove leading stuff of merges to make the interesting part visible
3416                         if (length($title) > 50) {
3417                                 $title =~ s/^Automatic //;
3418                                 $title =~ s/^merge (of|with) /Merge ... /i;
3419                                 if (length($title) > 50) {
3420                                         $title =~ s/(http|rsync):\/\///;
3421                                 }
3422                                 if (length($title) > 50) {
3423                                         $title =~ s/(master|www|rsync)\.//;
3424                                 }
3425                                 if (length($title) > 50) {
3426                                         $title =~ s/kernel.org:?//;
3427                                 }
3428                                 if (length($title) > 50) {
3429                                         $title =~ s/\/pub\/scm//;
3430                                 }
3431                         }
3432                         $co{'title_short'} = chop_str($title, 50, 5);
3433                         last;
3434                 }
3435         }
3436         if (! defined $co{'title'} || $co{'title'} eq "") {
3437                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3438         }
3439         # remove added spaces
3440         foreach my $line (@commit_lines) {
3441                 $line =~ s/^    //;
3442         }
3443         $co{'comment'} = \@commit_lines;
3444
3445         my $age = time - $co{'committer_epoch'};
3446         $co{'age'} = $age;
3447         $co{'age_string'} = age_string($age);
3448         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3449         if ($age > 60*60*24*7*2) {
3450                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3451                 $co{'age_string_age'} = $co{'age_string'};
3452         } else {
3453                 $co{'age_string_date'} = $co{'age_string'};
3454                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3455         }
3456         return %co;
3457 }
3458
3459 sub parse_commit {
3460         my ($commit_id) = @_;
3461         my %co;
3462
3463         local $/ = "\0";
3464
3465         open my $fd, "-|", git_cmd(), "rev-list",
3466                 "--parents",
3467                 "--header",
3468                 "--max-count=1",
3469                 $commit_id,
3470                 "--",
3471                 or die_error(500, "Open git-rev-list failed");
3472         %co = parse_commit_text(<$fd>, 1);
3473         close $fd;
3474
3475         return %co;
3476 }
3477
3478 sub parse_commits {
3479         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3480         my @cos;
3481
3482         $maxcount ||= 1;
3483         $skip ||= 0;
3484
3485         local $/ = "\0";
3486
3487         open my $fd, "-|", git_cmd(), "rev-list",
3488                 "--header",
3489                 @args,
3490                 ("--max-count=" . $maxcount),
3491                 ("--skip=" . $skip),
3492                 @extra_options,
3493                 $commit_id,
3494                 "--",
3495                 ($filename ? ($filename) : ())
3496                 or die_error(500, "Open git-rev-list failed");
3497         while (my $line = <$fd>) {
3498                 my %co = parse_commit_text($line);
3499                 push @cos, \%co;
3500         }
3501         close $fd;
3502
3503         return wantarray ? @cos : \@cos;
3504 }
3505
3506 # parse line of git-diff-tree "raw" output
3507 sub parse_difftree_raw_line {
3508         my $line = shift;
3509         my %res;
3510
3511         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3512         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3513         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3514                 $res{'from_mode'} = $1;
3515                 $res{'to_mode'} = $2;
3516                 $res{'from_id'} = $3;
3517                 $res{'to_id'} = $4;
3518                 $res{'status'} = $5;
3519                 $res{'similarity'} = $6;
3520                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3521                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3522                 } else {
3523                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3524                 }
3525         }
3526         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3527         # combined diff (for merge commit)
3528         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3529                 $res{'nparents'}  = length($1);
3530                 $res{'from_mode'} = [ split(' ', $2) ];
3531                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3532                 $res{'from_id'} = [ split(' ', $3) ];
3533                 $res{'to_id'} = pop @{$res{'from_id'}};
3534                 $res{'status'} = [ split('', $4) ];
3535                 $res{'to_file'} = unquote($5);
3536         }
3537         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3538         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3539                 $res{'commit'} = $1;
3540         }
3541
3542         return wantarray ? %res : \%res;
3543 }
3544
3545 # wrapper: return parsed line of git-diff-tree "raw" output
3546 # (the argument might be raw line, or parsed info)
3547 sub parsed_difftree_line {
3548         my $line_or_ref = shift;
3549
3550         if (ref($line_or_ref) eq "HASH") {
3551                 # pre-parsed (or generated by hand)
3552                 return $line_or_ref;
3553         } else {
3554                 return parse_difftree_raw_line($line_or_ref);
3555         }
3556 }
3557
3558 # parse line of git-ls-tree output
3559 sub parse_ls_tree_line {
3560         my $line = shift;
3561         my %opts = @_;
3562         my %res;
3563
3564         if ($opts{'-l'}) {
3565                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3566                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3567
3568                 $res{'mode'} = $1;
3569                 $res{'type'} = $2;
3570                 $res{'hash'} = $3;
3571                 $res{'size'} = $4;
3572                 if ($opts{'-z'}) {
3573                         $res{'name'} = $5;
3574                 } else {
3575                         $res{'name'} = unquote($5);
3576                 }
3577         } else {
3578                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3579                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3580
3581                 $res{'mode'} = $1;
3582                 $res{'type'} = $2;
3583                 $res{'hash'} = $3;
3584                 if ($opts{'-z'}) {
3585                         $res{'name'} = $4;
3586                 } else {
3587                         $res{'name'} = unquote($4);
3588                 }
3589         }
3590
3591         return wantarray ? %res : \%res;
3592 }
3593
3594 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3595 sub parse_from_to_diffinfo {
3596         my ($diffinfo, $from, $to, @parents) = @_;
3597
3598         if ($diffinfo->{'nparents'}) {
3599                 # combined diff
3600                 $from->{'file'} = [];
3601                 $from->{'href'} = [];
3602                 fill_from_file_info($diffinfo, @parents)
3603                         unless exists $diffinfo->{'from_file'};
3604                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3605                         $from->{'file'}[$i] =
3606                                 defined $diffinfo->{'from_file'}[$i] ?
3607                                         $diffinfo->{'from_file'}[$i] :
3608                                         $diffinfo->{'to_file'};
3609                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3610                                 $from->{'href'}[$i] = href(action=>"blob",
3611                                                            hash_base=>$parents[$i],
3612                                                            hash=>$diffinfo->{'from_id'}[$i],
3613                                                            file_name=>$from->{'file'}[$i]);
3614                         } else {
3615                                 $from->{'href'}[$i] = undef;
3616                         }
3617                 }
3618         } else {
3619                 # ordinary (not combined) diff
3620                 $from->{'file'} = $diffinfo->{'from_file'};
3621                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3622                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3623                                                hash=>$diffinfo->{'from_id'},
3624                                                file_name=>$from->{'file'});
3625                 } else {
3626                         delete $from->{'href'};
3627                 }
3628         }
3629
3630         $to->{'file'} = $diffinfo->{'to_file'};
3631         if (!is_deleted($diffinfo)) { # file exists in result
3632                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3633                                      hash=>$diffinfo->{'to_id'},
3634                                      file_name=>$to->{'file'});
3635         } else {
3636                 delete $to->{'href'};
3637         }
3638 }
3639
3640 ## ......................................................................
3641 ## parse to array of hashes functions
3642
3643 sub git_get_heads_list {
3644         my ($limit, @classes) = @_;
3645         @classes = ('heads') unless @classes;
3646         my @patterns = map { "refs/$_" } @classes;
3647         my @headslist;
3648
3649         open my $fd, '-|', git_cmd(), 'for-each-ref',
3650                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3651                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3652                 @patterns
3653                 or return;
3654         while (my $line = <$fd>) {
3655                 my %ref_item;
3656
3657                 chomp $line;
3658                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3659                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3660                 my ($committer, $epoch, $tz) =
3661                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3662                 $ref_item{'fullname'}  = $name;
3663                 $name =~ s!^refs/(?:head|remote)s/!!;
3664
3665                 $ref_item{'name'}  = $name;
3666                 $ref_item{'id'}    = $hash;
3667                 $ref_item{'title'} = $title || '(no commit message)';
3668                 $ref_item{'epoch'} = $epoch;
3669                 if ($epoch) {
3670                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3671                 } else {
3672                         $ref_item{'age'} = "unknown";
3673                 }
3674
3675                 push @headslist, \%ref_item;
3676         }
3677         close $fd;
3678
3679         return wantarray ? @headslist : \@headslist;
3680 }
3681
3682 sub git_get_tags_list {
3683         my $limit = shift;
3684         my @tagslist;
3685
3686         open my $fd, '-|', git_cmd(), 'for-each-ref',
3687                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3688                 '--format=%(objectname) %(objecttype) %(refname) '.
3689                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3690                 'refs/tags'
3691                 or return;
3692         while (my $line = <$fd>) {
3693                 my %ref_item;
3694
3695                 chomp $line;
3696                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3697                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3698                 my ($creator, $epoch, $tz) =
3699                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3700                 $ref_item{'fullname'} = $name;
3701                 $name =~ s!^refs/tags/!!;
3702
3703                 $ref_item{'type'} = $type;
3704                 $ref_item{'id'} = $id;
3705                 $ref_item{'name'} = $name;
3706                 if ($type eq "tag") {
3707                         $ref_item{'subject'} = $title;
3708                         $ref_item{'reftype'} = $reftype;
3709                         $ref_item{'refid'}   = $refid;
3710                 } else {
3711                         $ref_item{'reftype'} = $type;
3712                         $ref_item{'refid'}   = $id;
3713                 }
3714
3715                 if ($type eq "tag" || $type eq "commit") {
3716                         $ref_item{'epoch'} = $epoch;
3717                         if ($epoch) {
3718                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3719                         } else {
3720                                 $ref_item{'age'} = "unknown";
3721                         }
3722                 }
3723
3724                 push @tagslist, \%ref_item;
3725         }
3726         close $fd;
3727
3728         return wantarray ? @tagslist : \@tagslist;
3729 }
3730
3731 ## ----------------------------------------------------------------------
3732 ## filesystem-related functions
3733
3734 sub get_file_owner {
3735         my $path = shift;
3736
3737         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3738         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3739         if (!defined $gcos) {
3740                 return undef;
3741         }
3742         my $owner = $gcos;
3743         $owner =~ s/[,;].*$//;
3744         return to_utf8($owner);
3745 }
3746
3747 # assume that file exists
3748 sub insert_file {
3749         my $filename = shift;
3750
3751         open my $fd, '<', $filename;
3752         print map { to_utf8($_) } <$fd>;
3753         close $fd;
3754 }
3755
3756 ## ......................................................................
3757 ## mimetype related functions
3758
3759 sub mimetype_guess_file {
3760         my $filename = shift;
3761         my $mimemap = shift;
3762         -r $mimemap or return undef;
3763
3764         my %mimemap;
3765         open(my $mh, '<', $mimemap) or return undef;
3766         while (<$mh>) {
3767                 next if m/^#/; # skip comments
3768                 my ($mimetype, @exts) = split(/\s+/);
3769                 foreach my $ext (@exts) {
3770                         $mimemap{$ext} = $mimetype;
3771                 }
3772         }
3773         close($mh);
3774
3775         $filename =~ /\.([^.]*)$/;
3776         return $mimemap{$1};
3777 }
3778
3779 sub mimetype_guess {
3780         my $filename = shift;
3781         my $mime;
3782         $filename =~ /\./ or return undef;
3783
3784         if ($mimetypes_file) {
3785                 my $file = $mimetypes_file;
3786                 if ($file !~ m!^/!) { # if it is relative path
3787                         # it is relative to project
3788                         $file = "$projectroot/$project/$file";
3789                 }
3790                 $mime = mimetype_guess_file($filename, $file);
3791         }
3792         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3793         return $mime;
3794 }
3795
3796 sub blob_mimetype {
3797         my $fd = shift;
3798         my $filename = shift;
3799
3800         if ($filename) {
3801                 my $mime = mimetype_guess($filename);
3802                 $mime and return $mime;
3803         }
3804
3805         # just in case
3806         return $default_blob_plain_mimetype unless $fd;
3807
3808         if (-T $fd) {
3809                 return 'text/plain';
3810         } elsif (! $filename) {
3811                 return 'application/octet-stream';
3812         } elsif ($filename =~ m/\.png$/i) {
3813                 return 'image/png';
3814         } elsif ($filename =~ m/\.gif$/i) {
3815                 return 'image/gif';
3816         } elsif ($filename =~ m/\.jpe?g$/i) {
3817                 return 'image/jpeg';
3818         } else {
3819                 return 'application/octet-stream';
3820         }
3821 }
3822
3823 sub blob_contenttype {
3824         my ($fd, $file_name, $type) = @_;
3825
3826         $type ||= blob_mimetype($fd, $file_name);
3827         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3828                 $type .= "; charset=$default_text_plain_charset";
3829         }
3830
3831         return $type;
3832 }
3833
3834 # guess file syntax for syntax highlighting; return undef if no highlighting
3835 # the name of syntax can (in the future) depend on syntax highlighter used
3836 sub guess_file_syntax {
3837         my ($highlight, $mimetype, $file_name) = @_;
3838         return undef unless ($highlight && defined $file_name);
3839         my $basename = basename($file_name, '.in');
3840         return $highlight_basename{$basename}
3841                 if exists $highlight_basename{$basename};
3842
3843         $basename =~ /\.([^.]*)$/;
3844         my $ext = $1 or return undef;
3845         return $highlight_ext{$ext}
3846                 if exists $highlight_ext{$ext};
3847
3848         return undef;
3849 }
3850
3851 # run highlighter and return FD of its output,
3852 # or return original FD if no highlighting
3853 sub run_highlighter {
3854         my ($fd, $highlight, $syntax) = @_;
3855         return $fd unless ($highlight && defined $syntax);
3856
3857         close $fd;
3858         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3859                   quote_command($highlight_bin).
3860                   " --replace-tabs=8 --fragment --syntax $syntax |"
3861                 or die_error(500, "Couldn't open file or run syntax highlighter");
3862         return $fd;
3863 }
3864
3865 ## ======================================================================
3866 ## functions printing HTML: header, footer, error page
3867
3868 sub get_page_title {
3869         my $title = to_utf8($site_name);
3870
3871         unless (defined $project) {
3872                 if (defined $project_filter) {
3873                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3874                 }
3875                 return $title;
3876         }
3877         $title .= " - " . to_utf8($project);
3878
3879         return $title unless (defined $action);
3880         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3881
3882         return $title unless (defined $file_name);
3883         $title .= " - " . esc_path($file_name);
3884         if ($action eq "tree" && $file_name !~ m|/$|) {
3885                 $title .= "/";
3886         }
3887
3888         return $title;
3889 }
3890
3891 sub get_content_type_html {
3892         # require explicit support from the UA if we are to send the page as
3893         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3894         # we have to do this because MSIE sometimes globs '*/*', pretending to
3895         # support xhtml+xml but choking when it gets what it asked for.
3896         if (defined $cgi->http('HTTP_ACCEPT') &&
3897             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3898             $cgi->Accept('application/xhtml+xml') != 0) {
3899                 return 'application/xhtml+xml';
3900         } else {
3901                 return 'text/html';
3902         }
3903 }
3904
3905 sub print_feed_meta {
3906         if (defined $project) {
3907                 my %href_params = get_feed_info();
3908                 if (!exists $href_params{'-title'}) {
3909                         $href_params{'-title'} = 'log';
3910                 }
3911
3912                 foreach my $format (qw(RSS Atom)) {
3913                         my $type = lc($format);
3914                         my %link_attr = (
3915                                 '-rel' => 'alternate',
3916                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3917                                 '-type' => "application/$type+xml"
3918                         );
3919
3920                         $href_params{'extra_options'} = undef;
3921                         $href_params{'action'} = $type;
3922                         $link_attr{'-href'} = href(%href_params);
3923                         print "<link ".
3924                               "rel=\"$link_attr{'-rel'}\" ".
3925                               "title=\"$link_attr{'-title'}\" ".
3926                               "href=\"$link_attr{'-href'}\" ".
3927                               "type=\"$link_attr{'-type'}\" ".
3928                               "/>\n";
3929
3930                         $href_params{'extra_options'} = '--no-merges';
3931                         $link_attr{'-href'} = href(%href_params);
3932                         $link_attr{'-title'} .= ' (no merges)';
3933                         print "<link ".
3934                               "rel=\"$link_attr{'-rel'}\" ".
3935                               "title=\"$link_attr{'-title'}\" ".
3936                               "href=\"$link_attr{'-href'}\" ".
3937                               "type=\"$link_attr{'-type'}\" ".
3938                               "/>\n";
3939                 }
3940
3941         } else {
3942                 printf('<link rel="alternate" title="%s projects list" '.
3943                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3944                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3945                 printf('<link rel="alternate" title="%s projects feeds" '.
3946                        'href="%s" type="text/x-opml" />'."\n",
3947                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3948         }
3949 }
3950
3951 sub print_header_links {
3952         my $status = shift;
3953
3954         # print out each stylesheet that exist, providing backwards capability
3955         # for those people who defined $stylesheet in a config file
3956         if (defined $stylesheet) {
3957                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3958         } else {
3959                 foreach my $stylesheet (@stylesheets) {
3960                         next unless $stylesheet;
3961                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3962                 }
3963         }
3964         print_feed_meta()
3965                 if ($status eq '200 OK');
3966         if (defined $favicon) {
3967                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3968         }
3969 }
3970
3971 sub print_nav_breadcrumbs_path {
3972         my $dirprefix = undef;
3973         while (my $part = shift) {
3974                 $dirprefix .= "/" if defined $dirprefix;
3975                 $dirprefix .= $part;
3976                 print $cgi->a({-href => href(project => undef,
3977                                              project_filter => $dirprefix,
3978                                              action => "project_list")},
3979                               esc_html($part)) . " / ";
3980         }
3981 }
3982
3983 sub print_nav_breadcrumbs {
3984         my %opts = @_;
3985
3986         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3987         if (defined $project) {
3988                 my @dirname = split '/', $project;
3989                 my $projectbasename = pop @dirname;
3990                 print_nav_breadcrumbs_path(@dirname);
3991                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3992                 if (defined $action) {
3993                         my $action_print = $action ;
3994                         if (defined $opts{-action_extra}) {
3995                                 $action_print = $cgi->a({-href => href(action=>$action)},
3996                                         $action);
3997                         }
3998                         print " / $action_print";
3999                 }
4000                 if (defined $opts{-action_extra}) {
4001                         print " / $opts{-action_extra}";
4002                 }
4003                 print "\n";
4004         } elsif (defined $project_filter) {
4005                 print_nav_breadcrumbs_path(split '/', $project_filter);
4006         }
4007 }
4008
4009 sub print_search_form {
4010         if (!defined $searchtext) {
4011                 $searchtext = "";
4012         }
4013         my $search_hash;
4014         if (defined $hash_base) {
4015                 $search_hash = $hash_base;
4016         } elsif (defined $hash) {
4017                 $search_hash = $hash;
4018         } else {
4019                 $search_hash = "HEAD";
4020         }
4021         my $action = $my_uri;
4022         my $use_pathinfo = gitweb_check_feature('pathinfo');
4023         if ($use_pathinfo) {
4024                 $action .= "/".esc_url($project);
4025         }
4026         print $cgi->startform(-method => "get", -action => $action) .
4027               "<div class=\"search\">\n" .
4028               (!$use_pathinfo &&
4029               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4030               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4031               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4032               $cgi->popup_menu(-name => 'st', -default => 'commit',
4033                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4034               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4035               " search:\n",
4036               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4037               "<span title=\"Extended regular expression\">" .
4038               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4039                              -checked => $search_use_regexp) .
4040               "</span>" .
4041               "</div>" .
4042               $cgi->end_form() . "\n";
4043 }
4044
4045 sub git_header_html {
4046         my $status = shift || "200 OK";
4047         my $expires = shift;
4048         my %opts = @_;
4049
4050         my $title = get_page_title();
4051         my $content_type = get_content_type_html();
4052         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4053                            -status=> $status, -expires => $expires)
4054                 unless ($opts{'-no_http_header'});
4055         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4056         print <<EOF;
4057 <?xml version="1.0" encoding="utf-8"?>
4058 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4059 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4060 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4061 <!-- git core binaries version $git_version -->
4062 <head>
4063 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4064 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4065 <meta name="robots" content="index, nofollow"/>
4066 <title>$title</title>
4067 EOF
4068         # the stylesheet, favicon etc urls won't work correctly with path_info
4069         # unless we set the appropriate base URL
4070         if ($ENV{'PATH_INFO'}) {
4071                 print "<base href=\"".esc_url($base_url)."\" />\n";
4072         }
4073         print_header_links($status);
4074
4075         if (defined $site_html_head_string) {
4076                 print to_utf8($site_html_head_string);
4077         }
4078
4079         print "</head>\n" .
4080               "<body>\n";
4081
4082         if (defined $site_header && -f $site_header) {
4083                 insert_file($site_header);
4084         }
4085
4086         print "<div class=\"page_header\">\n";
4087         if (defined $logo) {
4088                 print $cgi->a({-href => esc_url($logo_url),
4089                                -title => $logo_label},
4090                               $cgi->img({-src => esc_url($logo),
4091                                          -width => 72, -height => 27,
4092                                          -alt => "git",
4093                                          -class => "logo"}));
4094         }
4095         print_nav_breadcrumbs(%opts);
4096         print "</div>\n";
4097
4098         my $have_search = gitweb_check_feature('search');
4099         if (defined $project && $have_search) {
4100                 print_search_form();
4101         }
4102 }
4103
4104 sub git_footer_html {
4105         my $feed_class = 'rss_logo';
4106
4107         print "<div class=\"page_footer\">\n";
4108         if (defined $project) {
4109                 my $descr = git_get_project_description($project);
4110                 if (defined $descr) {
4111                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4112                 }
4113
4114                 my %href_params = get_feed_info();
4115                 if (!%href_params) {
4116                         $feed_class .= ' generic';
4117                 }
4118                 $href_params{'-title'} ||= 'log';
4119
4120                 foreach my $format (qw(RSS Atom)) {
4121                         $href_params{'action'} = lc($format);
4122                         print $cgi->a({-href => href(%href_params),
4123                                       -title => "$href_params{'-title'} $format feed",
4124                                       -class => $feed_class}, $format)."\n";
4125                 }
4126
4127         } else {
4128                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4129                                              project_filter => $project_filter),
4130                               -class => $feed_class}, "OPML") . " ";
4131                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4132                                              project_filter => $project_filter),
4133                               -class => $feed_class}, "TXT") . "\n";
4134         }
4135         print "</div>\n"; # class="page_footer"
4136
4137         if (defined $t0 && gitweb_check_feature('timed')) {
4138                 print "<div id=\"generating_info\">\n";
4139                 print 'This page took '.
4140                       '<span id="generating_time" class="time_span">'.
4141                       tv_interval($t0, [ gettimeofday() ]).
4142                       ' seconds </span>'.
4143                       ' and '.
4144                       '<span id="generating_cmd">'.
4145                       $number_of_git_cmds.
4146                       '</span> git commands '.
4147                       " to generate.\n";
4148                 print "</div>\n"; # class="page_footer"
4149         }
4150
4151         if (defined $site_footer && -f $site_footer) {
4152                 insert_file($site_footer);
4153         }
4154
4155         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4156         if (defined $action &&
4157             $action eq 'blame_incremental') {
4158                 print qq!<script type="text/javascript">\n!.
4159                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4160                       qq!           "!. href() .qq!");\n!.
4161                       qq!</script>\n!;
4162         } else {
4163                 my ($jstimezone, $tz_cookie, $datetime_class) =
4164                         gitweb_get_feature('javascript-timezone');
4165
4166                 print qq!<script type="text/javascript">\n!.
4167                       qq!window.onload = function () {\n!;
4168                 if (gitweb_check_feature('javascript-actions')) {
4169                         print qq!       fixLinks();\n!;
4170                 }
4171                 if ($jstimezone && $tz_cookie && $datetime_class) {
4172                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4173                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4174                 }
4175                 print qq!};\n!.
4176                       qq!</script>\n!;
4177         }
4178
4179         print "</body>\n" .
4180               "</html>";
4181 }
4182
4183 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4184 # Example: die_error(404, 'Hash not found')
4185 # By convention, use the following status codes (as defined in RFC 2616):
4186 # 400: Invalid or missing CGI parameters, or
4187 #      requested object exists but has wrong type.
4188 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4189 #      this server or project.
4190 # 404: Requested object/revision/project doesn't exist.
4191 # 500: The server isn't configured properly, or
4192 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4193 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4194 # 503: The server is currently unavailable (because it is overloaded,
4195 #      or down for maintenance).  Generally, this is a temporary state.
4196 sub die_error {
4197         my $status = shift || 500;
4198         my $error = esc_html(shift) || "Internal Server Error";
4199         my $extra = shift;
4200         my %opts = @_;
4201
4202         my %http_responses = (
4203                 400 => '400 Bad Request',
4204                 403 => '403 Forbidden',
4205                 404 => '404 Not Found',
4206                 500 => '500 Internal Server Error',
4207                 503 => '503 Service Unavailable',
4208         );
4209         git_header_html($http_responses{$status}, undef, %opts);
4210         print <<EOF;
4211 <div class="page_body">
4212 <br /><br />
4213 $status - $error
4214 <br />
4215 EOF
4216         if (defined $extra) {
4217                 print "<hr />\n" .
4218                       "$extra\n";
4219         }
4220         print "</div>\n";
4221
4222         git_footer_html();
4223         goto DONE_GITWEB
4224                 unless ($opts{'-error_handler'});
4225 }
4226
4227 ## ----------------------------------------------------------------------
4228 ## functions printing or outputting HTML: navigation
4229
4230 sub git_print_page_nav {
4231         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4232         $extra = '' if !defined $extra; # pager or formats
4233
4234         my @navs = qw(summary shortlog log commit commitdiff tree);
4235         if ($suppress) {
4236                 @navs = grep { $_ ne $suppress } @navs;
4237         }
4238
4239         my %arg = map { $_ => {action=>$_} } @navs;
4240         if (defined $head) {
4241                 for (qw(commit commitdiff)) {
4242                         $arg{$_}{'hash'} = $head;
4243                 }
4244                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4245                         for (qw(shortlog log)) {
4246                                 $arg{$_}{'hash'} = $head;
4247                         }
4248                 }
4249         }
4250
4251         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4252         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4253
4254         my @actions = gitweb_get_feature('actions');
4255         my %repl = (
4256                 '%' => '%',
4257                 'n' => $project,         # project name
4258                 'f' => $git_dir,         # project path within filesystem
4259                 'h' => $treehead || '',  # current hash ('h' parameter)
4260                 'b' => $treebase || '',  # hash base ('hb' parameter)
4261         );
4262         while (@actions) {
4263                 my ($label, $link, $pos) = splice(@actions,0,3);
4264                 # insert
4265                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4266                 # munch munch
4267                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4268                 $arg{$label}{'_href'} = $link;
4269         }
4270
4271         print "<div class=\"page_nav\">\n" .
4272                 (join " | ",
4273                  map { $_ eq $current ?
4274                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4275                  } @navs);
4276         print "<br/>\n$extra<br/>\n" .
4277               "</div>\n";
4278 }
4279
4280 # returns a submenu for the nagivation of the refs views (tags, heads,
4281 # remotes) with the current view disabled and the remotes view only
4282 # available if the feature is enabled
4283 sub format_ref_views {
4284         my ($current) = @_;
4285         my @ref_views = qw{tags heads};
4286         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4287         return join " | ", map {
4288                 $_ eq $current ? $_ :
4289                 $cgi->a({-href => href(action=>$_)}, $_)
4290         } @ref_views
4291 }
4292
4293 sub format_paging_nav {
4294         my ($action, $page, $has_next_link) = @_;
4295         my $paging_nav;
4296
4297
4298         if ($page > 0) {
4299                 $paging_nav .=
4300                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4301                         " &sdot; " .
4302                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4303                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4304         } else {
4305                 $paging_nav .= "first &sdot; prev";
4306         }
4307
4308         if ($has_next_link) {
4309                 $paging_nav .= " &sdot; " .
4310                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4311                                  -accesskey => "n", -title => "Alt-n"}, "next");
4312         } else {
4313                 $paging_nav .= " &sdot; next";
4314         }
4315
4316         return $paging_nav;
4317 }
4318
4319 ## ......................................................................
4320 ## functions printing or outputting HTML: div
4321
4322 sub git_print_header_div {
4323         my ($action, $title, $hash, $hash_base) = @_;
4324         my %args = ();
4325
4326         $args{'action'} = $action;
4327         $args{'hash'} = $hash if $hash;
4328         $args{'hash_base'} = $hash_base if $hash_base;
4329
4330         print "<div class=\"header\">\n" .
4331               $cgi->a({-href => href(%args), -class => "title"},
4332               $title ? $title : $action) .
4333               "\n</div>\n";
4334 }
4335
4336 sub format_repo_url {
4337         my ($name, $url) = @_;
4338         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4339 }
4340
4341 # Group output by placing it in a DIV element and adding a header.
4342 # Options for start_div() can be provided by passing a hash reference as the
4343 # first parameter to the function.
4344 # Options to git_print_header_div() can be provided by passing an array
4345 # reference. This must follow the options to start_div if they are present.
4346 # The content can be a scalar, which is output as-is, a scalar reference, which
4347 # is output after html escaping, an IO handle passed either as *handle or
4348 # *handle{IO}, or a function reference. In the latter case all following
4349 # parameters will be taken as argument to the content function call.
4350 sub git_print_section {
4351         my ($div_args, $header_args, $content);
4352         my $arg = shift;
4353         if (ref($arg) eq 'HASH') {
4354                 $div_args = $arg;
4355                 $arg = shift;
4356         }
4357         if (ref($arg) eq 'ARRAY') {
4358                 $header_args = $arg;
4359                 $arg = shift;
4360         }
4361         $content = $arg;
4362
4363         print $cgi->start_div($div_args);
4364         git_print_header_div(@$header_args);
4365
4366         if (ref($content) eq 'CODE') {
4367                 $content->(@_);
4368         } elsif (ref($content) eq 'SCALAR') {
4369                 print esc_html($$content);
4370         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4371                 print <$content>;
4372         } elsif (!ref($content) && defined($content)) {
4373                 print $content;
4374         }
4375
4376         print $cgi->end_div;
4377 }
4378
4379 sub format_timestamp_html {
4380         my $date = shift;
4381         my $strtime = $date->{'rfc2822'};
4382
4383         my (undef, undef, $datetime_class) =
4384                 gitweb_get_feature('javascript-timezone');
4385         if ($datetime_class) {
4386                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4387         }
4388
4389         my $localtime_format = '(%02d:%02d %s)';
4390         if ($date->{'hour_local'} < 6) {
4391                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4392         }
4393         $strtime .= ' ' .
4394                     sprintf($localtime_format,
4395                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4396
4397         return $strtime;
4398 }
4399
4400 # Outputs the author name and date in long form
4401 sub git_print_authorship {
4402         my $co = shift;
4403         my %opts = @_;
4404         my $tag = $opts{-tag} || 'div';
4405         my $author = $co->{'author_name'};
4406
4407         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4408         print "<$tag class=\"author_date\">" .
4409               format_search_author($author, "author", esc_html($author)) .
4410               " [".format_timestamp_html(\%ad)."]".
4411               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4412               "</$tag>\n";
4413 }
4414
4415 # Outputs table rows containing the full author or committer information,
4416 # in the format expected for 'commit' view (& similar).
4417 # Parameters are a commit hash reference, followed by the list of people
4418 # to output information for. If the list is empty it defaults to both
4419 # author and committer.
4420 sub git_print_authorship_rows {
4421         my $co = shift;
4422         # too bad we can't use @people = @_ || ('author', 'committer')
4423         my @people = @_;
4424         @people = ('author', 'committer') unless @people;
4425         foreach my $who (@people) {
4426                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4427                 print "<tr><td>$who</td><td>" .
4428                       format_search_author($co->{"${who}_name"}, $who,
4429                                            esc_html($co->{"${who}_name"})) . " " .
4430                       format_search_author($co->{"${who}_email"}, $who,
4431                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4432                       "</td><td rowspan=\"2\">" .
4433                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4434                       "</td></tr>\n" .
4435                       "<tr>" .
4436                       "<td></td><td>" .
4437                       format_timestamp_html(\%wd) .
4438                       "</td>" .
4439                       "</tr>\n";
4440         }
4441 }
4442
4443 sub git_print_page_path {
4444         my $name = shift;
4445         my $type = shift;
4446         my $hb = shift;
4447
4448
4449         print "<div class=\"page_path\">";
4450         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4451                       -title => 'tree root'}, to_utf8("[$project]"));
4452         print " / ";
4453         if (defined $name) {
4454                 my @dirname = split '/', $name;
4455                 my $basename = pop @dirname;
4456                 my $fullname = '';
4457
4458                 foreach my $dir (@dirname) {
4459                         $fullname .= ($fullname ? '/' : '') . $dir;
4460                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4461                                                      hash_base=>$hb),
4462                                       -title => $fullname}, esc_path($dir));
4463                         print " / ";
4464                 }
4465                 if (defined $type && $type eq 'blob') {
4466                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4467                                                      hash_base=>$hb),
4468                                       -title => $name}, esc_path($basename));
4469                 } elsif (defined $type && $type eq 'tree') {
4470                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4471                                                      hash_base=>$hb),
4472                                       -title => $name}, esc_path($basename));
4473                         print " / ";
4474                 } else {
4475                         print esc_path($basename);
4476                 }
4477         }
4478         print "<br/></div>\n";
4479 }
4480
4481 sub git_print_log {
4482         my $log = shift;
4483         my %opts = @_;
4484
4485         if ($opts{'-remove_title'}) {
4486                 # remove title, i.e. first line of log
4487                 shift @$log;
4488         }
4489         # remove leading empty lines
4490         while (defined $log->[0] && $log->[0] eq "") {
4491                 shift @$log;
4492         }
4493
4494         # print log
4495         my $skip_blank_line = 0;
4496         foreach my $line (@$log) {
4497                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4498                         if (! $opts{'-remove_signoff'}) {
4499                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4500                                 $skip_blank_line = 1;
4501                         }
4502                         next;
4503                 }
4504
4505                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4506                         if (! $opts{'-remove_signoff'}) {
4507                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4508                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4509                                         "</span><br/>\n";
4510                                 $skip_blank_line = 1;
4511                         }
4512                         next;
4513                 }
4514
4515                 # print only one empty line
4516                 # do not print empty line after signoff
4517                 if ($line eq "") {
4518                         next if ($skip_blank_line);
4519                         $skip_blank_line = 1;
4520                 } else {
4521                         $skip_blank_line = 0;
4522                 }
4523
4524                 print format_log_line_html($line) . "<br/>\n";
4525         }
4526
4527         if ($opts{'-final_empty_line'}) {
4528                 # end with single empty line
4529                 print "<br/>\n" unless $skip_blank_line;
4530         }
4531 }
4532
4533 # return link target (what link points to)
4534 sub git_get_link_target {
4535         my $hash = shift;
4536         my $link_target;
4537
4538         # read link
4539         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4540                 or return;
4541         {
4542                 local $/ = undef;
4543                 $link_target = <$fd>;
4544         }
4545         close $fd
4546                 or return;
4547
4548         return $link_target;
4549 }
4550
4551 # given link target, and the directory (basedir) the link is in,
4552 # return target of link relative to top directory (top tree);
4553 # return undef if it is not possible (including absolute links).
4554 sub normalize_link_target {
4555         my ($link_target, $basedir) = @_;
4556
4557         # absolute symlinks (beginning with '/') cannot be normalized
4558         return if (substr($link_target, 0, 1) eq '/');
4559
4560         # normalize link target to path from top (root) tree (dir)
4561         my $path;
4562         if ($basedir) {
4563                 $path = $basedir . '/' . $link_target;
4564         } else {
4565                 # we are in top (root) tree (dir)
4566                 $path = $link_target;
4567         }
4568
4569         # remove //, /./, and /../
4570         my @path_parts;
4571         foreach my $part (split('/', $path)) {
4572                 # discard '.' and ''
4573                 next if (!$part || $part eq '.');
4574                 # handle '..'
4575                 if ($part eq '..') {
4576                         if (@path_parts) {
4577                                 pop @path_parts;
4578                         } else {
4579                                 # link leads outside repository (outside top dir)
4580                                 return;
4581                         }
4582                 } else {
4583                         push @path_parts, $part;
4584                 }
4585         }
4586         $path = join('/', @path_parts);
4587
4588         return $path;
4589 }
4590
4591 # print tree entry (row of git_tree), but without encompassing <tr> element
4592 sub git_print_tree_entry {
4593         my ($t, $basedir, $hash_base, $have_blame) = @_;
4594
4595         my %base_key = ();
4596         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4597
4598         # The format of a table row is: mode list link.  Where mode is
4599         # the mode of the entry, list is the name of the entry, an href,
4600         # and link is the action links of the entry.
4601
4602         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4603         if (exists $t->{'size'}) {
4604                 print "<td class=\"size\">$t->{'size'}</td>\n";
4605         }
4606         if ($t->{'type'} eq "blob") {
4607                 print "<td class=\"list\">" .
4608                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4609                                                file_name=>"$basedir$t->{'name'}", %base_key),
4610                                 -class => "list"}, esc_path($t->{'name'}));
4611                 if (S_ISLNK(oct $t->{'mode'})) {
4612                         my $link_target = git_get_link_target($t->{'hash'});
4613                         if ($link_target) {
4614                                 my $norm_target = normalize_link_target($link_target, $basedir);
4615                                 if (defined $norm_target) {
4616                                         print " -> " .
4617                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4618                                                                      file_name=>$norm_target),
4619                                                        -title => $norm_target}, esc_path($link_target));
4620                                 } else {
4621                                         print " -> " . esc_path($link_target);
4622                                 }
4623                         }
4624                 }
4625                 print "</td>\n";
4626                 print "<td class=\"link\">";
4627                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4628                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4629                               "blob");
4630                 if ($have_blame) {
4631                         print " | " .
4632                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4633                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4634                                       "blame");
4635                 }
4636                 if (defined $hash_base) {
4637                         print " | " .
4638                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4639                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4640                                       "history");
4641                 }
4642                 print " | " .
4643                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4644                                                file_name=>"$basedir$t->{'name'}")},
4645                                 "raw");
4646                 print "</td>\n";
4647
4648         } elsif ($t->{'type'} eq "tree") {
4649                 print "<td class=\"list\">";
4650                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4651                                              file_name=>"$basedir$t->{'name'}",
4652                                              %base_key)},
4653                               esc_path($t->{'name'}));
4654                 print "</td>\n";
4655                 print "<td class=\"link\">";
4656                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4657                                              file_name=>"$basedir$t->{'name'}",
4658                                              %base_key)},
4659                               "tree");
4660                 if (defined $hash_base) {
4661                         print " | " .
4662                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4663                                                      file_name=>"$basedir$t->{'name'}")},
4664                                       "history");
4665                 }
4666                 print "</td>\n";
4667         } else {
4668                 # unknown object: we can only present history for it
4669                 # (this includes 'commit' object, i.e. submodule support)
4670                 print "<td class=\"list\">" .
4671                       esc_path($t->{'name'}) .
4672                       "</td>\n";
4673                 print "<td class=\"link\">";
4674                 if (defined $hash_base) {
4675                         print $cgi->a({-href => href(action=>"history",
4676                                                      hash_base=>$hash_base,
4677                                                      file_name=>"$basedir$t->{'name'}")},
4678                                       "history");
4679                 }
4680                 print "</td>\n";
4681         }
4682 }
4683
4684 ## ......................................................................
4685 ## functions printing large fragments of HTML
4686
4687 # get pre-image filenames for merge (combined) diff
4688 sub fill_from_file_info {
4689         my ($diff, @parents) = @_;
4690
4691         $diff->{'from_file'} = [ ];
4692         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4693         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4694                 if ($diff->{'status'}[$i] eq 'R' ||
4695                     $diff->{'status'}[$i] eq 'C') {
4696                         $diff->{'from_file'}[$i] =
4697                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4698                 }
4699         }
4700
4701         return $diff;
4702 }
4703
4704 # is current raw difftree line of file deletion
4705 sub is_deleted {
4706         my $diffinfo = shift;
4707
4708         return $diffinfo->{'to_id'} eq ('0' x 40);
4709 }
4710
4711 # does patch correspond to [previous] difftree raw line
4712 # $diffinfo  - hashref of parsed raw diff format
4713 # $patchinfo - hashref of parsed patch diff format
4714 #              (the same keys as in $diffinfo)
4715 sub is_patch_split {
4716         my ($diffinfo, $patchinfo) = @_;
4717
4718         return defined $diffinfo && defined $patchinfo
4719                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4720 }
4721
4722
4723 sub git_difftree_body {
4724         my ($difftree, $hash, @parents) = @_;
4725         my ($parent) = $parents[0];
4726         my $have_blame = gitweb_check_feature('blame');
4727         print "<div class=\"list_head\">\n";
4728         if ($#{$difftree} > 10) {
4729                 print(($#{$difftree} + 1) . " files changed:\n");
4730         }
4731         print "</div>\n";
4732
4733         print "<table class=\"" .
4734               (@parents > 1 ? "combined " : "") .
4735               "diff_tree\">\n";
4736
4737         # header only for combined diff in 'commitdiff' view
4738         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4739         if ($has_header) {
4740                 # table header
4741                 print "<thead><tr>\n" .
4742                        "<th></th><th></th>\n"; # filename, patchN link
4743                 for (my $i = 0; $i < @parents; $i++) {
4744                         my $par = $parents[$i];
4745                         print "<th>" .
4746                               $cgi->a({-href => href(action=>"commitdiff",
4747                                                      hash=>$hash, hash_parent=>$par),
4748                                        -title => 'commitdiff to parent number ' .
4749                                                   ($i+1) . ': ' . substr($par,0,7)},
4750                                       $i+1) .
4751                               "&nbsp;</th>\n";
4752                 }
4753                 print "</tr></thead>\n<tbody>\n";
4754         }
4755
4756         my $alternate = 1;
4757         my $patchno = 0;
4758         foreach my $line (@{$difftree}) {
4759                 my $diff = parsed_difftree_line($line);
4760
4761                 if ($alternate) {
4762                         print "<tr class=\"dark\">\n";
4763                 } else {
4764                         print "<tr class=\"light\">\n";
4765                 }
4766                 $alternate ^= 1;
4767
4768                 if (exists $diff->{'nparents'}) { # combined diff
4769
4770                         fill_from_file_info($diff, @parents)
4771                                 unless exists $diff->{'from_file'};
4772
4773                         if (!is_deleted($diff)) {
4774                                 # file exists in the result (child) commit
4775                                 print "<td>" .
4776                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4777                                                              file_name=>$diff->{'to_file'},
4778                                                              hash_base=>$hash),
4779                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4780                                       "</td>\n";
4781                         } else {
4782                                 print "<td>" .
4783                                       esc_path($diff->{'to_file'}) .
4784                                       "</td>\n";
4785                         }
4786
4787                         if ($action eq 'commitdiff') {
4788                                 # link to patch
4789                                 $patchno++;
4790                                 print "<td class=\"link\">" .
4791                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4792                                               "patch") .
4793                                       " | " .
4794                                       "</td>\n";
4795                         }
4796
4797                         my $has_history = 0;
4798                         my $not_deleted = 0;
4799                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4800                                 my $hash_parent = $parents[$i];
4801                                 my $from_hash = $diff->{'from_id'}[$i];
4802                                 my $from_path = $diff->{'from_file'}[$i];
4803                                 my $status = $diff->{'status'}[$i];
4804
4805                                 $has_history ||= ($status ne 'A');
4806                                 $not_deleted ||= ($status ne 'D');
4807
4808                                 if ($status eq 'A') {
4809                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4810                                 } elsif ($status eq 'D') {
4811                                         print "<td class=\"link\">" .
4812                                               $cgi->a({-href => href(action=>"blob",
4813                                                                      hash_base=>$hash,
4814                                                                      hash=>$from_hash,
4815                                                                      file_name=>$from_path)},
4816                                                       "blob" . ($i+1)) .
4817                                               " | </td>\n";
4818                                 } else {
4819                                         if ($diff->{'to_id'} eq $from_hash) {
4820                                                 print "<td class=\"link nochange\">";
4821                                         } else {
4822                                                 print "<td class=\"link\">";
4823                                         }
4824                                         print $cgi->a({-href => href(action=>"blobdiff",
4825                                                                      hash=>$diff->{'to_id'},
4826                                                                      hash_parent=>$from_hash,
4827                                                                      hash_base=>$hash,
4828                                                                      hash_parent_base=>$hash_parent,
4829                                                                      file_name=>$diff->{'to_file'},
4830                                                                      file_parent=>$from_path)},
4831                                                       "diff" . ($i+1)) .
4832                                               " | </td>\n";
4833                                 }
4834                         }
4835
4836                         print "<td class=\"link\">";
4837                         if ($not_deleted) {
4838                                 print $cgi->a({-href => href(action=>"blob",
4839                                                              hash=>$diff->{'to_id'},
4840                                                              file_name=>$diff->{'to_file'},
4841                                                              hash_base=>$hash)},
4842                                               "blob");
4843                                 print " | " if ($has_history);
4844                         }
4845                         if ($has_history) {
4846                                 print $cgi->a({-href => href(action=>"history",
4847                                                              file_name=>$diff->{'to_file'},
4848                                                              hash_base=>$hash)},
4849                                               "history");
4850                         }
4851                         print "</td>\n";
4852
4853                         print "</tr>\n";
4854                         next; # instead of 'else' clause, to avoid extra indent
4855                 }
4856                 # else ordinary diff
4857
4858                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4859                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4860                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4861                         $to_mode_oct = oct $diff->{'to_mode'};
4862                         if (S_ISREG($to_mode_oct)) { # only for regular file
4863                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4864                         }
4865                         $to_file_type = file_type($diff->{'to_mode'});
4866                 }
4867                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4868                         $from_mode_oct = oct $diff->{'from_mode'};
4869                         if (S_ISREG($from_mode_oct)) { # only for regular file
4870                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4871                         }
4872                         $from_file_type = file_type($diff->{'from_mode'});
4873                 }
4874
4875                 if ($diff->{'status'} eq "A") { # created
4876                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4877                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4878                         $mode_chng   .= "]</span>";
4879                         print "<td>";
4880                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4881                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4882                                       -class => "list"}, esc_path($diff->{'file'}));
4883                         print "</td>\n";
4884                         print "<td>$mode_chng</td>\n";
4885                         print "<td class=\"link\">";
4886                         if ($action eq 'commitdiff') {
4887                                 # link to patch
4888                                 $patchno++;
4889                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4890                                               "patch") .
4891                                       " | ";
4892                         }
4893                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4894                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4895                                       "blob");
4896                         print "</td>\n";
4897
4898                 } elsif ($diff->{'status'} eq "D") { # deleted
4899                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4900                         print "<td>";
4901                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4902                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4903                                        -class => "list"}, esc_path($diff->{'file'}));
4904                         print "</td>\n";
4905                         print "<td>$mode_chng</td>\n";
4906                         print "<td class=\"link\">";
4907                         if ($action eq 'commitdiff') {
4908                                 # link to patch
4909                                 $patchno++;
4910                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4911                                               "patch") .
4912                                       " | ";
4913                         }
4914                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4915                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4916                                       "blob") . " | ";
4917                         if ($have_blame) {
4918                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4919                                                              file_name=>$diff->{'file'})},
4920                                               "blame") . " | ";
4921                         }
4922                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4923                                                      file_name=>$diff->{'file'})},
4924                                       "history");
4925                         print "</td>\n";
4926
4927                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4928                         my $mode_chnge = "";
4929                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4930                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4931                                 if ($from_file_type ne $to_file_type) {
4932                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4933                                 }
4934                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4935                                         if ($from_mode_str && $to_mode_str) {
4936                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4937                                         } elsif ($to_mode_str) {
4938                                                 $mode_chnge .= " mode: $to_mode_str";
4939                                         }
4940                                 }
4941                                 $mode_chnge .= "]</span>\n";
4942                         }
4943                         print "<td>";
4944                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4945                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4946                                       -class => "list"}, esc_path($diff->{'file'}));
4947                         print "</td>\n";
4948                         print "<td>$mode_chnge</td>\n";
4949                         print "<td class=\"link\">";
4950                         if ($action eq 'commitdiff') {
4951                                 # link to patch
4952                                 $patchno++;
4953                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4954                                               "patch") .
4955                                       " | ";
4956                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4957                                 # "commit" view and modified file (not onlu mode changed)
4958                                 print $cgi->a({-href => href(action=>"blobdiff",
4959                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4960                                                              hash_base=>$hash, hash_parent_base=>$parent,
4961                                                              file_name=>$diff->{'file'})},
4962                                               "diff") .
4963                                       " | ";
4964                         }
4965                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4966                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4967                                        "blob") . " | ";
4968                         if ($have_blame) {
4969                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4970                                                              file_name=>$diff->{'file'})},
4971                                               "blame") . " | ";
4972                         }
4973                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4974                                                      file_name=>$diff->{'file'})},
4975                                       "history");
4976                         print "</td>\n";
4977
4978                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4979                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4980                         my $nstatus = $status_name{$diff->{'status'}};
4981                         my $mode_chng = "";
4982                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4983                                 # mode also for directories, so we cannot use $to_mode_str
4984                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4985                         }
4986                         print "<td>" .
4987                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4988                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4989                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4990                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4991                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4992                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4993                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4994                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4995                               "<td class=\"link\">";
4996                         if ($action eq 'commitdiff') {
4997                                 # link to patch
4998                                 $patchno++;
4999                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5000                                               "patch") .
5001                                       " | ";
5002                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5003                                 # "commit" view and modified file (not only pure rename or copy)
5004                                 print $cgi->a({-href => href(action=>"blobdiff",
5005                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5006                                                              hash_base=>$hash, hash_parent_base=>$parent,
5007                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5008                                               "diff") .
5009                                       " | ";
5010                         }
5011                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5012                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5013                                       "blob") . " | ";
5014                         if ($have_blame) {
5015                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5016                                                              file_name=>$diff->{'to_file'})},
5017                                               "blame") . " | ";
5018                         }
5019                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5020                                                     file_name=>$diff->{'to_file'})},
5021                                       "history");
5022                         print "</td>\n";
5023
5024                 } # we should not encounter Unmerged (U) or Unknown (X) status
5025                 print "</tr>\n";
5026         }
5027         print "</tbody>" if $has_header;
5028         print "</table>\n";
5029 }
5030
5031 # Print context lines and then rem/add lines in a side-by-side manner.
5032 sub print_sidebyside_diff_lines {
5033         my ($ctx, $rem, $add) = @_;
5034
5035         # print context block before add/rem block
5036         if (@$ctx) {
5037                 print join '',
5038                         '<div class="chunk_block ctx">',
5039                                 '<div class="old">',
5040                                 @$ctx,
5041                                 '</div>',
5042                                 '<div class="new">',
5043                                 @$ctx,
5044                                 '</div>',
5045                         '</div>';
5046         }
5047
5048         if (!@$add) {
5049                 # pure removal
5050                 print join '',
5051                         '<div class="chunk_block rem">',
5052                                 '<div class="old">',
5053                                 @$rem,
5054                                 '</div>',
5055                         '</div>';
5056         } elsif (!@$rem) {
5057                 # pure addition
5058                 print join '',
5059                         '<div class="chunk_block add">',
5060                                 '<div class="new">',
5061                                 @$add,
5062                                 '</div>',
5063                         '</div>';
5064         } else {
5065                 print join '',
5066                         '<div class="chunk_block chg">',
5067                                 '<div class="old">',
5068                                 @$rem,
5069                                 '</div>',
5070                                 '<div class="new">',
5071                                 @$add,
5072                                 '</div>',
5073                         '</div>';
5074         }
5075 }
5076
5077 # Print context lines and then rem/add lines in inline manner.
5078 sub print_inline_diff_lines {
5079         my ($ctx, $rem, $add) = @_;
5080
5081         print @$ctx, @$rem, @$add;
5082 }
5083
5084 # Format removed and added line, mark changed part and HTML-format them.
5085 # Implementation is based on contrib/diff-highlight
5086 sub format_rem_add_lines_pair {
5087         my ($rem, $add, $num_parents) = @_;
5088
5089         # We need to untabify lines before split()'ing them;
5090         # otherwise offsets would be invalid.
5091         chomp $rem;
5092         chomp $add;
5093         $rem = untabify($rem);
5094         $add = untabify($add);
5095
5096         my @rem = split(//, $rem);
5097         my @add = split(//, $add);
5098         my ($esc_rem, $esc_add);
5099         # Ignore leading +/- characters for each parent.
5100         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5101         my ($prefix_has_nonspace, $suffix_has_nonspace);
5102
5103         my $shorter = (@rem < @add) ? @rem : @add;
5104         while ($prefix_len < $shorter) {
5105                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5106
5107                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5108                 $prefix_len++;
5109         }
5110
5111         while ($prefix_len + $suffix_len < $shorter) {
5112                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5113
5114                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5115                 $suffix_len++;
5116         }
5117
5118         # Mark lines that are different from each other, but have some common
5119         # part that isn't whitespace.  If lines are completely different, don't
5120         # mark them because that would make output unreadable, especially if
5121         # diff consists of multiple lines.
5122         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5123                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5124                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5125                 $esc_add = esc_html_hl_regions($add, 'marked',
5126                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5127         } else {
5128                 $esc_rem = esc_html($rem, -nbsp=>1);
5129                 $esc_add = esc_html($add, -nbsp=>1);
5130         }
5131
5132         return format_diff_line(\$esc_rem, 'rem'),
5133                format_diff_line(\$esc_add, 'add');
5134 }
5135
5136 # HTML-format diff context, removed and added lines.
5137 sub format_ctx_rem_add_lines {
5138         my ($ctx, $rem, $add, $num_parents) = @_;
5139         my (@new_ctx, @new_rem, @new_add);
5140         my $can_highlight = 0;
5141         my $is_combined = ($num_parents > 1);
5142
5143         # Highlight if every removed line has a corresponding added line.
5144         if (@$add > 0 && @$add == @$rem) {
5145                 $can_highlight = 1;
5146
5147                 # Highlight lines in combined diff only if the chunk contains
5148                 # diff between the same version, e.g.
5149                 #
5150                 #    - a
5151                 #   -  b
5152                 #    + c
5153                 #   +  d
5154                 #
5155                 # Otherwise the highlightling would be confusing.
5156                 if ($is_combined) {
5157                         for (my $i = 0; $i < @$add; $i++) {
5158                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5159                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5160
5161                                 $prefix_rem =~ s/-/+/g;
5162
5163                                 if ($prefix_rem ne $prefix_add) {
5164                                         $can_highlight = 0;
5165                                         last;
5166                                 }
5167                         }
5168                 }
5169         }
5170
5171         if ($can_highlight) {
5172                 for (my $i = 0; $i < @$add; $i++) {
5173                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5174                                 $rem->[$i], $add->[$i], $num_parents);
5175                         push @new_rem, $line_rem;
5176                         push @new_add, $line_add;
5177                 }
5178         } else {
5179                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5180                 @new_add = map { format_diff_line($_, 'add') } @$add;
5181         }
5182
5183         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5184
5185         return (\@new_ctx, \@new_rem, \@new_add);
5186 }
5187
5188 # Print context lines and then rem/add lines.
5189 sub print_diff_lines {
5190         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5191         my $is_combined = $num_parents > 1;
5192
5193         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5194                 $num_parents);
5195
5196         if ($diff_style eq 'sidebyside' && !$is_combined) {
5197                 print_sidebyside_diff_lines($ctx, $rem, $add);
5198         } else {
5199                 # default 'inline' style and unknown styles
5200                 print_inline_diff_lines($ctx, $rem, $add);
5201         }
5202 }
5203
5204 sub print_diff_chunk {
5205         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5206         my (@ctx, @rem, @add);
5207
5208         # The class of the previous line.
5209         my $prev_class = '';
5210
5211         return unless @chunk;
5212
5213         # incomplete last line might be among removed or added lines,
5214         # or both, or among context lines: find which
5215         for (my $i = 1; $i < @chunk; $i++) {
5216                 if ($chunk[$i][0] eq 'incomplete') {
5217                         $chunk[$i][0] = $chunk[$i-1][0];
5218                 }
5219         }
5220
5221         # guardian
5222         push @chunk, ["", ""];
5223
5224         foreach my $line_info (@chunk) {
5225                 my ($class, $line) = @$line_info;
5226
5227                 # print chunk headers
5228                 if ($class && $class eq 'chunk_header') {
5229                         print format_diff_line($line, $class, $from, $to);
5230                         next;
5231                 }
5232
5233                 ## print from accumulator when have some add/rem lines or end
5234                 # of chunk (flush context lines), or when have add and rem
5235                 # lines and new block is reached (otherwise add/rem lines could
5236                 # be reordered)
5237                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5238                     (@rem && @add && $class ne $prev_class)) {
5239                         print_diff_lines(\@ctx, \@rem, \@add,
5240                                          $diff_style, $num_parents);
5241                         @ctx = @rem = @add = ();
5242                 }
5243
5244                 ## adding lines to accumulator
5245                 # guardian value
5246                 last unless $line;
5247                 # rem, add or change
5248                 if ($class eq 'rem') {
5249                         push @rem, $line;
5250                 } elsif ($class eq 'add') {
5251                         push @add, $line;
5252                 }
5253                 # context line
5254                 if ($class eq 'ctx') {
5255                         push @ctx, $line;
5256                 }
5257
5258                 $prev_class = $class;
5259         }
5260 }
5261
5262 sub git_patchset_body {
5263         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5264         my ($hash_parent) = $hash_parents[0];
5265
5266         my $is_combined = (@hash_parents > 1);
5267         my $patch_idx = 0;
5268         my $patch_number = 0;
5269         my $patch_line;
5270         my $diffinfo;
5271         my $to_name;
5272         my (%from, %to);
5273         my @chunk; # for side-by-side diff
5274
5275         print "<div class=\"patchset\">\n";
5276
5277         # skip to first patch
5278         while ($patch_line = <$fd>) {
5279                 chomp $patch_line;
5280
5281                 last if ($patch_line =~ m/^diff /);
5282         }
5283
5284  PATCH:
5285         while ($patch_line) {
5286
5287                 # parse "git diff" header line
5288                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5289                         # $1 is from_name, which we do not use
5290                         $to_name = unquote($2);
5291                         $to_name =~ s!^b/!!;
5292                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5293                         # $1 is 'cc' or 'combined', which we do not use
5294                         $to_name = unquote($2);
5295                 } else {
5296                         $to_name = undef;
5297                 }
5298
5299                 # check if current patch belong to current raw line
5300                 # and parse raw git-diff line if needed
5301                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5302                         # this is continuation of a split patch
5303                         print "<div class=\"patch cont\">\n";
5304                 } else {
5305                         # advance raw git-diff output if needed
5306                         $patch_idx++ if defined $diffinfo;
5307
5308                         # read and prepare patch information
5309                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5310
5311                         # compact combined diff output can have some patches skipped
5312                         # find which patch (using pathname of result) we are at now;
5313                         if ($is_combined) {
5314                                 while ($to_name ne $diffinfo->{'to_file'}) {
5315                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5316                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5317                                               "</div>\n";  # class="patch"
5318
5319                                         $patch_idx++;
5320                                         $patch_number++;
5321
5322                                         last if $patch_idx > $#$difftree;
5323                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5324                                 }
5325                         }
5326
5327                         # modifies %from, %to hashes
5328                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5329
5330                         # this is first patch for raw difftree line with $patch_idx index
5331                         # we index @$difftree array from 0, but number patches from 1
5332                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5333                 }
5334
5335                 # git diff header
5336                 #assert($patch_line =~ m/^diff /) if DEBUG;
5337                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5338                 $patch_number++;
5339                 # print "git diff" header
5340                 print format_git_diff_header_line($patch_line, $diffinfo,
5341                                                   \%from, \%to);
5342
5343                 # print extended diff header
5344                 print "<div class=\"diff extended_header\">\n";
5345         EXTENDED_HEADER:
5346                 while ($patch_line = <$fd>) {
5347                         chomp $patch_line;
5348
5349                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5350
5351                         print format_extended_diff_header_line($patch_line, $diffinfo,
5352                                                                \%from, \%to);
5353                 }
5354                 print "</div>\n"; # class="diff extended_header"
5355
5356                 # from-file/to-file diff header
5357                 if (! $patch_line) {
5358                         print "</div>\n"; # class="patch"
5359                         last PATCH;
5360                 }
5361                 next PATCH if ($patch_line =~ m/^diff /);
5362                 #assert($patch_line =~ m/^---/) if DEBUG;
5363
5364                 my $last_patch_line = $patch_line;
5365                 $patch_line = <$fd>;
5366                 chomp $patch_line;
5367                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5368
5369                 print format_diff_from_to_header($last_patch_line, $patch_line,
5370                                                  $diffinfo, \%from, \%to,
5371                                                  @hash_parents);
5372
5373                 # the patch itself
5374         LINE:
5375                 while ($patch_line = <$fd>) {
5376                         chomp $patch_line;
5377
5378                         next PATCH if ($patch_line =~ m/^diff /);
5379
5380                         my $class = diff_line_class($patch_line, \%from, \%to);
5381
5382                         if ($class eq 'chunk_header') {
5383                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5384                                 @chunk = ();
5385                         }
5386
5387                         push @chunk, [ $class, $patch_line ];
5388                 }
5389
5390         } continue {
5391                 if (@chunk) {
5392                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5393                         @chunk = ();
5394                 }
5395                 print "</div>\n"; # class="patch"
5396         }
5397
5398         # for compact combined (--cc) format, with chunk and patch simplification
5399         # the patchset might be empty, but there might be unprocessed raw lines
5400         for (++$patch_idx if $patch_number > 0;
5401              $patch_idx < @$difftree;
5402              ++$patch_idx) {
5403                 # read and prepare patch information
5404                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5405
5406                 # generate anchor for "patch" links in difftree / whatchanged part
5407                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5408                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5409                       "</div>\n";  # class="patch"
5410
5411                 $patch_number++;
5412         }
5413
5414         if ($patch_number == 0) {
5415                 if (@hash_parents > 1) {
5416                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5417                 } else {
5418                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5419                 }
5420         }
5421
5422         print "</div>\n"; # class="patchset"
5423 }
5424
5425 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5426
5427 sub git_project_search_form {
5428         my ($searchtext, $search_use_regexp) = @_;
5429
5430         my $limit = '';
5431         if ($project_filter) {
5432                 $limit = " in '$project_filter/'";
5433         }
5434
5435         print "<div class=\"projsearch\">\n";
5436         print $cgi->startform(-method => 'get', -action => $my_uri) .
5437               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5438         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5439                 if (defined $project_filter);
5440         print $cgi->textfield(-name => 's', -value => $searchtext,
5441                               -title => "Search project by name and description$limit",
5442                               -size => 60) . "\n" .
5443               "<span title=\"Extended regular expression\">" .
5444               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5445                              -checked => $search_use_regexp) .
5446               "</span>\n" .
5447               $cgi->submit(-name => 'btnS', -value => 'Search') .
5448               $cgi->end_form() . "\n" .
5449               $cgi->a({-href => href(project => undef, searchtext => undef,
5450                                      project_filter => $project_filter)},
5451                       esc_html("List all projects$limit")) . "<br />\n";
5452         print "</div>\n";
5453 }
5454
5455 # entry for given @keys needs filling if at least one of keys in list
5456 # is not present in %$project_info
5457 sub project_info_needs_filling {
5458         my ($project_info, @keys) = @_;
5459
5460         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5461         foreach my $key (@keys) {
5462                 if (!exists $project_info->{$key}) {
5463                         return 1;
5464                 }
5465         }
5466         return;
5467 }
5468
5469 # fills project list info (age, description, owner, category, forks, etc.)
5470 # for each project in the list, removing invalid projects from
5471 # returned list, or fill only specified info.
5472 #
5473 # Invalid projects are removed from the returned list if and only if you
5474 # ask 'age' or 'age_string' to be filled, because they are the only fields
5475 # that run unconditionally git command that requires repository, and
5476 # therefore do always check if project repository is invalid.
5477 #
5478 # USAGE:
5479 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5480 #   ensures that 'descr_long' and 'ctags' fields are filled
5481 # * @project_list = fill_project_list_info(\@project_list)
5482 #   ensures that all fields are filled (and invalid projects removed)
5483 #
5484 # NOTE: modifies $projlist, but does not remove entries from it
5485 sub fill_project_list_info {
5486         my ($projlist, @wanted_keys) = @_;
5487         my @projects;
5488         my $filter_set = sub { return @_; };
5489         if (@wanted_keys) {
5490                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5491                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5492         }
5493
5494         my $show_ctags = gitweb_check_feature('ctags');
5495  PROJECT:
5496         foreach my $pr (@$projlist) {
5497                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5498                         my (@activity) = git_get_last_activity($pr->{'path'});
5499                         unless (@activity) {
5500                                 next PROJECT;
5501                         }
5502                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5503                 }
5504                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5505                         my $descr = git_get_project_description($pr->{'path'}) || "";
5506                         $descr = to_utf8($descr);
5507                         $pr->{'descr_long'} = $descr;
5508                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5509                 }
5510                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5511                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5512                 }
5513                 if ($show_ctags &&
5514                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5515                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5516                 }
5517                 if ($projects_list_group_categories &&
5518                     project_info_needs_filling($pr, $filter_set->('category'))) {
5519                         my $cat = git_get_project_category($pr->{'path'}) ||
5520                                                            $project_list_default_category;
5521                         $pr->{'category'} = to_utf8($cat);
5522                 }
5523
5524                 push @projects, $pr;
5525         }
5526
5527         return @projects;
5528 }
5529
5530 sub sort_projects_list {
5531         my ($projlist, $order) = @_;
5532         my @projects;
5533
5534         my %order_info = (
5535                 project => { key => 'path', type => 'str' },
5536                 descr => { key => 'descr_long', type => 'str' },
5537                 owner => { key => 'owner', type => 'str' },
5538                 age => { key => 'age', type => 'num' }
5539         );
5540         my $oi = $order_info{$order};
5541         return @$projlist unless defined $oi;
5542         if ($oi->{'type'} eq 'str') {
5543                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5544         } else {
5545                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5546         }
5547
5548         return @projects;
5549 }
5550
5551 # returns a hash of categories, containing the list of project
5552 # belonging to each category
5553 sub build_projlist_by_category {
5554         my ($projlist, $from, $to) = @_;
5555         my %categories;
5556
5557         $from = 0 unless defined $from;
5558         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5559
5560         for (my $i = $from; $i <= $to; $i++) {
5561                 my $pr = $projlist->[$i];
5562                 push @{$categories{ $pr->{'category'} }}, $pr;
5563         }
5564
5565         return wantarray ? %categories : \%categories;
5566 }
5567
5568 # print 'sort by' <th> element, generating 'sort by $name' replay link
5569 # if that order is not selected
5570 sub print_sort_th {
5571         print format_sort_th(@_);
5572 }
5573
5574 sub format_sort_th {
5575         my ($name, $order, $header) = @_;
5576         my $sort_th = "";
5577         $header ||= ucfirst($name);
5578
5579         if ($order eq $name) {
5580                 $sort_th .= "<th>$header</th>\n";
5581         } else {
5582                 $sort_th .= "<th>" .
5583                             $cgi->a({-href => href(-replay=>1, order=>$name),
5584                                      -class => "header"}, $header) .
5585                             "</th>\n";
5586         }
5587
5588         return $sort_th;
5589 }
5590
5591 sub git_project_list_rows {
5592         my ($projlist, $from, $to, $check_forks) = @_;
5593
5594         $from = 0 unless defined $from;
5595         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5596
5597         my $alternate = 1;
5598         for (my $i = $from; $i <= $to; $i++) {
5599                 my $pr = $projlist->[$i];
5600
5601                 if ($alternate) {
5602                         print "<tr class=\"dark\">\n";
5603                 } else {
5604                         print "<tr class=\"light\">\n";
5605                 }
5606                 $alternate ^= 1;
5607
5608                 if ($check_forks) {
5609                         print "<td>";
5610                         if ($pr->{'forks'}) {
5611                                 my $nforks = scalar @{$pr->{'forks'}};
5612                                 if ($nforks > 0) {
5613                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5614                                                        -title => "$nforks forks"}, "+");
5615                                 } else {
5616                                         print $cgi->span({-title => "$nforks forks"}, "+");
5617                                 }
5618                         }
5619                         print "</td>\n";
5620                 }
5621                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5622                                         -class => "list"},
5623                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5624                       "</td>\n" .
5625                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5626                                         -class => "list",
5627                                         -title => $pr->{'descr_long'}},
5628                                         $search_regexp
5629                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5630                                                                     $pr->{'descr'}, $search_regexp)
5631                                         : esc_html($pr->{'descr'})) .
5632                       "</td>\n";
5633                 unless ($omit_owner) {
5634                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5635                 }
5636                 unless ($omit_age_column) {
5637                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5638                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5639                 }
5640                 print"<td class=\"link\">" .
5641                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5642                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5643                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5644                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5645                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5646                       "</td>\n" .
5647                       "</tr>\n";
5648         }
5649 }
5650
5651 sub git_project_list_body {
5652         # actually uses global variable $project
5653         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5654         my @projects = @$projlist;
5655
5656         my $check_forks = gitweb_check_feature('forks');
5657         my $show_ctags  = gitweb_check_feature('ctags');
5658         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5659         $check_forks = undef
5660                 if ($tagfilter || $search_regexp);
5661
5662         # filtering out forks before filling info allows to do less work
5663         @projects = filter_forks_from_projects_list(\@projects)
5664                 if ($check_forks);
5665         # search_projects_list pre-fills required info
5666         @projects = search_projects_list(\@projects,
5667                                          'search_regexp' => $search_regexp,
5668                                          'tagfilter'  => $tagfilter)
5669                 if ($tagfilter || $search_regexp);
5670         # fill the rest
5671         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5672         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5673         push @all_fields, 'owner' unless($omit_owner);
5674         @projects = fill_project_list_info(\@projects, @all_fields);
5675
5676         $order ||= $default_projects_order;
5677         $from = 0 unless defined $from;
5678         $to = $#projects if (!defined $to || $#projects < $to);
5679
5680         # short circuit
5681         if ($from > $to) {
5682                 print "<center>\n".
5683                       "<b>No such projects found</b><br />\n".
5684                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5685                       "</center>\n<br />\n";
5686                 return;
5687         }
5688
5689         @projects = sort_projects_list(\@projects, $order);
5690
5691         if ($show_ctags) {
5692                 my $ctags = git_gather_all_ctags(\@projects);
5693                 my $cloud = git_populate_project_tagcloud($ctags);
5694                 print git_show_project_tagcloud($cloud, 64);
5695         }
5696
5697         print "<table class=\"project_list\">\n";
5698         unless ($no_header) {
5699                 print "<tr>\n";
5700                 if ($check_forks) {
5701                         print "<th></th>\n";
5702                 }
5703                 print_sort_th('project', $order, 'Project');
5704                 print_sort_th('descr', $order, 'Description');
5705                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5706                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5707                 print "<th></th>\n" . # for links
5708                       "</tr>\n";
5709         }
5710
5711         if ($projects_list_group_categories) {
5712                 # only display categories with projects in the $from-$to window
5713                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5714                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5715                 foreach my $cat (sort keys %categories) {
5716                         unless ($cat eq "") {
5717                                 print "<tr>\n";
5718                                 if ($check_forks) {
5719                                         print "<td></td>\n";
5720                                 }
5721                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5722                                 print "</tr>\n";
5723                         }
5724
5725                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5726                 }
5727         } else {
5728                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5729         }
5730
5731         if (defined $extra) {
5732                 print "<tr>\n";
5733                 if ($check_forks) {
5734                         print "<td></td>\n";
5735                 }
5736                 print "<td colspan=\"5\">$extra</td>\n" .
5737                       "</tr>\n";
5738         }
5739         print "</table>\n";
5740 }
5741
5742 sub git_log_body {
5743         # uses global variable $project
5744         my ($commitlist, $from, $to, $refs, $extra) = @_;
5745
5746         $from = 0 unless defined $from;
5747         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5748
5749         for (my $i = 0; $i <= $to; $i++) {
5750                 my %co = %{$commitlist->[$i]};
5751                 next if !%co;
5752                 my $commit = $co{'id'};
5753                 my $ref = format_ref_marker($refs, $commit);
5754                 git_print_header_div('commit',
5755                                "<span class=\"age\">$co{'age_string'}</span>" .
5756                                esc_html($co{'title'}) . $ref,
5757                                $commit);
5758                 print "<div class=\"title_text\">\n" .
5759                       "<div class=\"log_link\">\n" .
5760                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5761                       " | " .
5762                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5763                       " | " .
5764                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5765                       "<br/>\n" .
5766                       "</div>\n";
5767                       git_print_authorship(\%co, -tag => 'span');
5768                       print "<br/>\n</div>\n";
5769
5770                 print "<div class=\"log_body\">\n";
5771                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5772                 print "</div>\n";
5773         }
5774         if ($extra) {
5775                 print "<div class=\"page_nav\">\n";
5776                 print "$extra\n";
5777                 print "</div>\n";
5778         }
5779 }
5780
5781 sub git_shortlog_body {
5782         # uses global variable $project
5783         my ($commitlist, $from, $to, $refs, $extra) = @_;
5784
5785         $from = 0 unless defined $from;
5786         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5787
5788         print "<table class=\"shortlog\">\n";
5789         my $alternate = 1;
5790         for (my $i = $from; $i <= $to; $i++) {
5791                 my %co = %{$commitlist->[$i]};
5792                 my $commit = $co{'id'};
5793                 my $ref = format_ref_marker($refs, $commit);
5794                 if ($alternate) {
5795                         print "<tr class=\"dark\">\n";
5796                 } else {
5797                         print "<tr class=\"light\">\n";
5798                 }
5799                 $alternate ^= 1;
5800                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5801                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5802                       format_author_html('td', \%co, 10) . "<td>";
5803                 print format_subject_html($co{'title'}, $co{'title_short'},
5804                                           href(action=>"commit", hash=>$commit), $ref);
5805                 print "</td>\n" .
5806                       "<td class=\"link\">" .
5807                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5808                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5809                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5810                 my $snapshot_links = format_snapshot_links($commit);
5811                 if (defined $snapshot_links) {
5812                         print " | " . $snapshot_links;
5813                 }
5814                 print "</td>\n" .
5815                       "</tr>\n";
5816         }
5817         if (defined $extra) {
5818                 print "<tr>\n" .
5819                       "<td colspan=\"4\">$extra</td>\n" .
5820                       "</tr>\n";
5821         }
5822         print "</table>\n";
5823 }
5824
5825 sub git_history_body {
5826         # Warning: assumes constant type (blob or tree) during history
5827         my ($commitlist, $from, $to, $refs, $extra,
5828             $file_name, $file_hash, $ftype) = @_;
5829
5830         $from = 0 unless defined $from;
5831         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5832
5833         print "<table class=\"history\">\n";
5834         my $alternate = 1;
5835         for (my $i = $from; $i <= $to; $i++) {
5836                 my %co = %{$commitlist->[$i]};
5837                 if (!%co) {
5838                         next;
5839                 }
5840                 my $commit = $co{'id'};
5841
5842                 my $ref = format_ref_marker($refs, $commit);
5843
5844                 if ($alternate) {
5845                         print "<tr class=\"dark\">\n";
5846                 } else {
5847                         print "<tr class=\"light\">\n";
5848                 }
5849                 $alternate ^= 1;
5850                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5851         # shortlog:   format_author_html('td', \%co, 10)
5852                       format_author_html('td', \%co, 15, 3) . "<td>";
5853                 # originally git_history used chop_str($co{'title'}, 50)
5854                 print format_subject_html($co{'title'}, $co{'title_short'},
5855                                           href(action=>"commit", hash=>$commit), $ref);
5856                 print "</td>\n" .
5857                       "<td class=\"link\">" .
5858                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5859                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5860
5861                 if ($ftype eq 'blob') {
5862                         my $blob_current = $file_hash;
5863                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5864                         if (defined $blob_current && defined $blob_parent &&
5865                                         $blob_current ne $blob_parent) {
5866                                 print " | " .
5867                                         $cgi->a({-href => href(action=>"blobdiff",
5868                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5869                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5870                                                                file_name=>$file_name)},
5871                                                 "diff to current");
5872                         }
5873                 }
5874                 print "</td>\n" .
5875                       "</tr>\n";
5876         }
5877         if (defined $extra) {
5878                 print "<tr>\n" .
5879                       "<td colspan=\"4\">$extra</td>\n" .
5880                       "</tr>\n";
5881         }
5882         print "</table>\n";
5883 }
5884
5885 sub git_tags_body {
5886         # uses global variable $project
5887         my ($taglist, $from, $to, $extra) = @_;
5888         $from = 0 unless defined $from;
5889         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5890
5891         print "<table class=\"tags\">\n";
5892         my $alternate = 1;
5893         for (my $i = $from; $i <= $to; $i++) {
5894                 my $entry = $taglist->[$i];
5895                 my %tag = %$entry;
5896                 my $comment = $tag{'subject'};
5897                 my $comment_short;
5898                 if (defined $comment) {
5899                         $comment_short = chop_str($comment, 30, 5);
5900                 }
5901                 if ($alternate) {
5902                         print "<tr class=\"dark\">\n";
5903                 } else {
5904                         print "<tr class=\"light\">\n";
5905                 }
5906                 $alternate ^= 1;
5907                 if (defined $tag{'age'}) {
5908                         print "<td><i>$tag{'age'}</i></td>\n";
5909                 } else {
5910                         print "<td></td>\n";
5911                 }
5912                 print "<td>" .
5913                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5914                                -class => "list name"}, esc_html($tag{'name'})) .
5915                       "</td>\n" .
5916                       "<td>";
5917                 if (defined $comment) {
5918                         print format_subject_html($comment, $comment_short,
5919                                                   href(action=>"tag", hash=>$tag{'id'}));
5920                 }
5921                 print "</td>\n" .
5922                       "<td class=\"selflink\">";
5923                 if ($tag{'type'} eq "tag") {
5924                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5925                 } else {
5926                         print "&nbsp;";
5927                 }
5928                 print "</td>\n" .
5929                       "<td class=\"link\">" . " | " .
5930                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5931                 if ($tag{'reftype'} eq "commit") {
5932                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5933                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5934                 } elsif ($tag{'reftype'} eq "blob") {
5935                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5936                 }
5937                 print "</td>\n" .
5938                       "</tr>";
5939         }
5940         if (defined $extra) {
5941                 print "<tr>\n" .
5942                       "<td colspan=\"5\">$extra</td>\n" .
5943                       "</tr>\n";
5944         }
5945         print "</table>\n";
5946 }
5947
5948 sub git_heads_body {
5949         # uses global variable $project
5950         my ($headlist, $head_at, $from, $to, $extra) = @_;
5951         $from = 0 unless defined $from;
5952         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5953
5954         print "<table class=\"heads\">\n";
5955         my $alternate = 1;
5956         for (my $i = $from; $i <= $to; $i++) {
5957                 my $entry = $headlist->[$i];
5958                 my %ref = %$entry;
5959                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5960                 if ($alternate) {
5961                         print "<tr class=\"dark\">\n";
5962                 } else {
5963                         print "<tr class=\"light\">\n";
5964                 }
5965                 $alternate ^= 1;
5966                 print "<td><i>$ref{'age'}</i></td>\n" .
5967                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5968                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5969                                -class => "list name"},esc_html($ref{'name'})) .
5970                       "</td>\n" .
5971                       "<td class=\"link\">" .
5972                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5973                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5974                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5975                       "</td>\n" .
5976                       "</tr>";
5977         }
5978         if (defined $extra) {
5979                 print "<tr>\n" .
5980                       "<td colspan=\"3\">$extra</td>\n" .
5981                       "</tr>\n";
5982         }
5983         print "</table>\n";
5984 }
5985
5986 # Display a single remote block
5987 sub git_remote_block {
5988         my ($remote, $rdata, $limit, $head) = @_;
5989
5990         my $heads = $rdata->{'heads'};
5991         my $fetch = $rdata->{'fetch'};
5992         my $push = $rdata->{'push'};
5993
5994         my $urls_table = "<table class=\"projects_list\">\n" ;
5995
5996         if (defined $fetch) {
5997                 if ($fetch eq $push) {
5998                         $urls_table .= format_repo_url("URL", $fetch);
5999                 } else {
6000                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6001                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6002                 }
6003         } elsif (defined $push) {
6004                 $urls_table .= format_repo_url("Push URL", $push);
6005         } else {
6006                 $urls_table .= format_repo_url("", "No remote URL");
6007         }
6008
6009         $urls_table .= "</table>\n";
6010
6011         my $dots;
6012         if (defined $limit && $limit < @$heads) {
6013                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6014         }
6015
6016         print $urls_table;
6017         git_heads_body($heads, $head, 0, $limit, $dots);
6018 }
6019
6020 # Display a list of remote names with the respective fetch and push URLs
6021 sub git_remotes_list {
6022         my ($remotedata, $limit) = @_;
6023         print "<table class=\"heads\">\n";
6024         my $alternate = 1;
6025         my @remotes = sort keys %$remotedata;
6026
6027         my $limited = $limit && $limit < @remotes;
6028
6029         $#remotes = $limit - 1 if $limited;
6030
6031         while (my $remote = shift @remotes) {
6032                 my $rdata = $remotedata->{$remote};
6033                 my $fetch = $rdata->{'fetch'};
6034                 my $push = $rdata->{'push'};
6035                 if ($alternate) {
6036                         print "<tr class=\"dark\">\n";
6037                 } else {
6038                         print "<tr class=\"light\">\n";
6039                 }
6040                 $alternate ^= 1;
6041                 print "<td>" .
6042                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6043                                -class=> "list name"},esc_html($remote)) .
6044                       "</td>";
6045                 print "<td class=\"link\">" .
6046                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6047                       " | " .
6048                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6049                       "</td>";
6050
6051                 print "</tr>\n";
6052         }
6053
6054         if ($limited) {
6055                 print "<tr>\n" .
6056                       "<td colspan=\"3\">" .
6057                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6058                       "</td>\n" . "</tr>\n";
6059         }
6060
6061         print "</table>";
6062 }
6063
6064 # Display remote heads grouped by remote, unless there are too many
6065 # remotes, in which case we only display the remote names
6066 sub git_remotes_body {
6067         my ($remotedata, $limit, $head) = @_;
6068         if ($limit and $limit < keys %$remotedata) {
6069                 git_remotes_list($remotedata, $limit);
6070         } else {
6071                 fill_remote_heads($remotedata);
6072                 while (my ($remote, $rdata) = each %$remotedata) {
6073                         git_print_section({-class=>"remote", -id=>$remote},
6074                                 ["remotes", $remote, $remote], sub {
6075                                         git_remote_block($remote, $rdata, $limit, $head);
6076                                 });
6077                 }
6078         }
6079 }
6080
6081 sub git_search_message {
6082         my %co = @_;
6083
6084         my $greptype;
6085         if ($searchtype eq 'commit') {
6086                 $greptype = "--grep=";
6087         } elsif ($searchtype eq 'author') {
6088                 $greptype = "--author=";
6089         } elsif ($searchtype eq 'committer') {
6090                 $greptype = "--committer=";
6091         }
6092         $greptype .= $searchtext;
6093         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6094                                        $greptype, '--regexp-ignore-case',
6095                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6096
6097         my $paging_nav = '';
6098         if ($page > 0) {
6099                 $paging_nav .=
6100                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6101                                 "first") .
6102                         " &sdot; " .
6103                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6104                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6105         } else {
6106                 $paging_nav .= "first &sdot; prev";
6107         }
6108         my $next_link = '';
6109         if ($#commitlist >= 100) {
6110                 $next_link =
6111                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6112                                  -accesskey => "n", -title => "Alt-n"}, "next");
6113                 $paging_nav .= " &sdot; $next_link";
6114         } else {
6115                 $paging_nav .= " &sdot; next";
6116         }
6117
6118         git_header_html();
6119
6120         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6121         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6122         if ($page == 0 && !@commitlist) {
6123                 print "<p>No match.</p>\n";
6124         } else {
6125                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6126         }
6127
6128         git_footer_html();
6129 }
6130
6131 sub git_search_changes {
6132         my %co = @_;
6133
6134         local $/ = "\n";
6135         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6136                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6137                 ($search_use_regexp ? '--pickaxe-regex' : ())
6138                         or die_error(500, "Open git-log failed");
6139
6140         git_header_html();
6141
6142         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6143         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6144
6145         print "<table class=\"pickaxe search\">\n";
6146         my $alternate = 1;
6147         undef %co;
6148         my @files;
6149         while (my $line = <$fd>) {
6150                 chomp $line;
6151                 next unless $line;
6152
6153                 my %set = parse_difftree_raw_line($line);
6154                 if (defined $set{'commit'}) {
6155                         # finish previous commit
6156                         if (%co) {
6157                                 print "</td>\n" .
6158                                       "<td class=\"link\">" .
6159                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6160                                               "commit") .
6161                                       " | " .
6162                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6163                                                              hash_base=>$co{'id'})},
6164                                               "tree") .
6165                                       "</td>\n" .
6166                                       "</tr>\n";
6167                         }
6168
6169                         if ($alternate) {
6170                                 print "<tr class=\"dark\">\n";
6171                         } else {
6172                                 print "<tr class=\"light\">\n";
6173                         }
6174                         $alternate ^= 1;
6175                         %co = parse_commit($set{'commit'});
6176                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6177                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6178                               "<td><i>$author</i></td>\n" .
6179                               "<td>" .
6180                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6181                                       -class => "list subject"},
6182                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6183                 } elsif (defined $set{'to_id'}) {
6184                         next if ($set{'to_id'} =~ m/^0{40}$/);
6185
6186                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6187                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6188                                       -class => "list"},
6189                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6190                               "<br/>\n";
6191                 }
6192         }
6193         close $fd;
6194
6195         # finish last commit (warning: repetition!)
6196         if (%co) {
6197                 print "</td>\n" .
6198                       "<td class=\"link\">" .
6199                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6200                               "commit") .
6201                       " | " .
6202                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6203                                              hash_base=>$co{'id'})},
6204                               "tree") .
6205                       "</td>\n" .
6206                       "</tr>\n";
6207         }
6208
6209         print "</table>\n";
6210
6211         git_footer_html();
6212 }
6213
6214 sub git_search_files {
6215         my %co = @_;
6216
6217         local $/ = "\n";
6218         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6219                 $search_use_regexp ? ('-E', '-i') : '-F',
6220                 $searchtext, $co{'tree'}
6221                         or die_error(500, "Open git-grep failed");
6222
6223         git_header_html();
6224
6225         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6226         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6227
6228         print "<table class=\"grep_search\">\n";
6229         my $alternate = 1;
6230         my $matches = 0;
6231         my $lastfile = '';
6232         my $file_href;
6233         while (my $line = <$fd>) {
6234                 chomp $line;
6235                 my ($file, $lno, $ltext, $binary);
6236                 last if ($matches++ > 1000);
6237                 if ($line =~ /^Binary file (.+) matches$/) {
6238                         $file = $1;
6239                         $binary = 1;
6240                 } else {
6241                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6242                         $file =~ s/^$co{'tree'}://;
6243                 }
6244                 if ($file ne $lastfile) {
6245                         $lastfile and print "</td></tr>\n";
6246                         if ($alternate++) {
6247                                 print "<tr class=\"dark\">\n";
6248                         } else {
6249                                 print "<tr class=\"light\">\n";
6250                         }
6251                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6252                                           file_name=>$file);
6253                         print "<td class=\"list\">".
6254                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6255                         print "</td><td>\n";
6256                         $lastfile = $file;
6257                 }
6258                 if ($binary) {
6259                         print "<div class=\"binary\">Binary file</div>\n";
6260                 } else {
6261                         $ltext = untabify($ltext);
6262                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6263                                 $ltext = esc_html($1, -nbsp=>1);
6264                                 $ltext .= '<span class="match">';
6265                                 $ltext .= esc_html($2, -nbsp=>1);
6266                                 $ltext .= '</span>';
6267                                 $ltext .= esc_html($3, -nbsp=>1);
6268                         } else {
6269                                 $ltext = esc_html($ltext, -nbsp=>1);
6270                         }
6271                         print "<div class=\"pre\">" .
6272                                 $cgi->a({-href => $file_href.'#l'.$lno,
6273                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6274                                 ' ' .  $ltext . "</div>\n";
6275                 }
6276         }
6277         if ($lastfile) {
6278                 print "</td></tr>\n";
6279                 if ($matches > 1000) {
6280                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6281                 }
6282         } else {
6283                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6284         }
6285         close $fd;
6286
6287         print "</table>\n";
6288
6289         git_footer_html();
6290 }
6291
6292 sub git_search_grep_body {
6293         my ($commitlist, $from, $to, $extra) = @_;
6294         $from = 0 unless defined $from;
6295         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6296
6297         print "<table class=\"commit_search\">\n";
6298         my $alternate = 1;
6299         for (my $i = $from; $i <= $to; $i++) {
6300                 my %co = %{$commitlist->[$i]};
6301                 if (!%co) {
6302                         next;
6303                 }
6304                 my $commit = $co{'id'};
6305                 if ($alternate) {
6306                         print "<tr class=\"dark\">\n";
6307                 } else {
6308                         print "<tr class=\"light\">\n";
6309                 }
6310                 $alternate ^= 1;
6311                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6312                       format_author_html('td', \%co, 15, 5) .
6313                       "<td>" .
6314                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6315                                -class => "list subject"},
6316                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6317                 my $comment = $co{'comment'};
6318                 foreach my $line (@$comment) {
6319                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6320                                 my ($lead, $match, $trail) = ($1, $2, $3);
6321                                 $match = chop_str($match, 70, 5, 'center');
6322                                 my $contextlen = int((80 - length($match))/2);
6323                                 $contextlen = 30 if ($contextlen > 30);
6324                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6325                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6326
6327                                 $lead  = esc_html($lead);
6328                                 $match = esc_html($match);
6329                                 $trail = esc_html($trail);
6330
6331                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6332                         }
6333                 }
6334                 print "</td>\n" .
6335                       "<td class=\"link\">" .
6336                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6337                       " | " .
6338                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6339                       " | " .
6340                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6341                 print "</td>\n" .
6342                       "</tr>\n";
6343         }
6344         if (defined $extra) {
6345                 print "<tr>\n" .
6346                       "<td colspan=\"3\">$extra</td>\n" .
6347                       "</tr>\n";
6348         }
6349         print "</table>\n";
6350 }
6351
6352 ## ======================================================================
6353 ## ======================================================================
6354 ## actions
6355
6356 sub git_project_list {
6357         my $order = $input_params{'order'};
6358         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6359                 die_error(400, "Unknown order parameter");
6360         }
6361
6362         my @list = git_get_projects_list($project_filter, $strict_export);
6363         if (!@list) {
6364                 die_error(404, "No projects found");
6365         }
6366
6367         git_header_html();
6368         if (defined $home_text && -f $home_text) {
6369                 print "<div class=\"index_include\">\n";
6370                 insert_file($home_text);
6371                 print "</div>\n";
6372         }
6373
6374         git_project_search_form($searchtext, $search_use_regexp);
6375         git_project_list_body(\@list, $order);
6376         git_footer_html();
6377 }
6378
6379 sub git_forks {
6380         my $order = $input_params{'order'};
6381         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6382                 die_error(400, "Unknown order parameter");
6383         }
6384
6385         my $filter = $project;
6386         $filter =~ s/\.git$//;
6387         my @list = git_get_projects_list($filter);
6388         if (!@list) {
6389                 die_error(404, "No forks found");
6390         }
6391
6392         git_header_html();
6393         git_print_page_nav('','');
6394         git_print_header_div('summary', "$project forks");
6395         git_project_list_body(\@list, $order);
6396         git_footer_html();
6397 }
6398
6399 sub git_project_index {
6400         my @projects = git_get_projects_list($project_filter, $strict_export);
6401         if (!@projects) {
6402                 die_error(404, "No projects found");
6403         }
6404
6405         print $cgi->header(
6406                 -type => 'text/plain',
6407                 -charset => 'utf-8',
6408                 -content_disposition => 'inline; filename="index.aux"');
6409
6410         foreach my $pr (@projects) {
6411                 if (!exists $pr->{'owner'}) {
6412                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6413                 }
6414
6415                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6416                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6417                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6418                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6419                 $path  =~ s/ /\+/g;
6420                 $owner =~ s/ /\+/g;
6421
6422                 print "$path $owner\n";
6423         }
6424 }
6425
6426 sub git_summary {
6427         my $descr = git_get_project_description($project) || "none";
6428         my %co = parse_commit("HEAD");
6429         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6430         my $head = $co{'id'};
6431         my $remote_heads = gitweb_check_feature('remote_heads');
6432
6433         my $owner = git_get_project_owner($project);
6434
6435         my $refs = git_get_references();
6436         # These get_*_list functions return one more to allow us to see if
6437         # there are more ...
6438         my @taglist  = git_get_tags_list(16);
6439         my @headlist = git_get_heads_list(16);
6440         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6441         my @forklist;
6442         my $check_forks = gitweb_check_feature('forks');
6443
6444         if ($check_forks) {
6445                 # find forks of a project
6446                 my $filter = $project;
6447                 $filter =~ s/\.git$//;
6448                 @forklist = git_get_projects_list($filter);
6449                 # filter out forks of forks
6450                 @forklist = filter_forks_from_projects_list(\@forklist)
6451                         if (@forklist);
6452         }
6453
6454         git_header_html();
6455         git_print_page_nav('summary','', $head);
6456
6457         print "<div class=\"title\">&nbsp;</div>\n";
6458         print "<table class=\"projects_list\">\n" .
6459               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6460         unless ($omit_owner) {
6461                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6462         }
6463         if (defined $cd{'rfc2822'}) {
6464                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6465                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6466         }
6467
6468         # use per project git URL list in $projectroot/$project/cloneurl
6469         # or make project git URL from git base URL and project name
6470         my $url_tag = "URL";
6471         my @url_list = git_get_project_url_list($project);
6472         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6473         foreach my $git_url (@url_list) {
6474                 next unless $git_url;
6475                 print format_repo_url($url_tag, $git_url);
6476                 $url_tag = "";
6477         }
6478
6479         # Tag cloud
6480         my $show_ctags = gitweb_check_feature('ctags');
6481         if ($show_ctags) {
6482                 my $ctags = git_get_project_ctags($project);
6483                 if (%$ctags) {
6484                         # without ability to add tags, don't show if there are none
6485                         my $cloud = git_populate_project_tagcloud($ctags);
6486                         print "<tr id=\"metadata_ctags\">" .
6487                               "<td>content tags</td>" .
6488                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6489                               "</tr>\n";
6490                 }
6491         }
6492
6493         print "</table>\n";
6494
6495         # If XSS prevention is on, we don't include README.html.
6496         # TODO: Allow a readme in some safe format.
6497         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6498                 print "<div class=\"title\">readme</div>\n" .
6499                       "<div class=\"readme\">\n";
6500                 insert_file("$projectroot/$project/README.html");
6501                 print "\n</div>\n"; # class="readme"
6502         }
6503
6504         # we need to request one more than 16 (0..15) to check if
6505         # those 16 are all
6506         my @commitlist = $head ? parse_commits($head, 17) : ();
6507         if (@commitlist) {
6508                 git_print_header_div('shortlog');
6509                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6510                                   $#commitlist <=  15 ? undef :
6511                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6512         }
6513
6514         if (@taglist) {
6515                 git_print_header_div('tags');
6516                 git_tags_body(\@taglist, 0, 15,
6517                               $#taglist <=  15 ? undef :
6518                               $cgi->a({-href => href(action=>"tags")}, "..."));
6519         }
6520
6521         if (@headlist) {
6522                 git_print_header_div('heads');
6523                 git_heads_body(\@headlist, $head, 0, 15,
6524                                $#headlist <= 15 ? undef :
6525                                $cgi->a({-href => href(action=>"heads")}, "..."));
6526         }
6527
6528         if (%remotedata) {
6529                 git_print_header_div('remotes');
6530                 git_remotes_body(\%remotedata, 15, $head);
6531         }
6532
6533         if (@forklist) {
6534                 git_print_header_div('forks');
6535                 git_project_list_body(\@forklist, 'age', 0, 15,
6536                                       $#forklist <= 15 ? undef :
6537                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6538                                       'no_header');
6539         }
6540
6541         git_footer_html();
6542 }
6543
6544 sub git_tag {
6545         my %tag = parse_tag($hash);
6546
6547         if (! %tag) {
6548                 die_error(404, "Unknown tag object");
6549         }
6550
6551         my $head = git_get_head_hash($project);
6552         git_header_html();
6553         git_print_page_nav('','', $head,undef,$head);
6554         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6555         print "<div class=\"title_text\">\n" .
6556               "<table class=\"object_header\">\n" .
6557               "<tr>\n" .
6558               "<td>object</td>\n" .
6559               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6560                                $tag{'object'}) . "</td>\n" .
6561               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6562                                               $tag{'type'}) . "</td>\n" .
6563               "</tr>\n";
6564         if (defined($tag{'author'})) {
6565                 git_print_authorship_rows(\%tag, 'author');
6566         }
6567         print "</table>\n\n" .
6568               "</div>\n";
6569         print "<div class=\"page_body\">";
6570         my $comment = $tag{'comment'};
6571         foreach my $line (@$comment) {
6572                 chomp $line;
6573                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6574         }
6575         print "</div>\n";
6576         git_footer_html();
6577 }
6578
6579 sub git_blame_common {
6580         my $format = shift || 'porcelain';
6581         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6582                 $format = 'incremental';
6583                 $action = 'blame_incremental'; # for page title etc
6584         }
6585
6586         # permissions
6587         gitweb_check_feature('blame')
6588                 or die_error(403, "Blame view not allowed");
6589
6590         # error checking
6591         die_error(400, "No file name given") unless $file_name;
6592         $hash_base ||= git_get_head_hash($project);
6593         die_error(404, "Couldn't find base commit") unless $hash_base;
6594         my %co = parse_commit($hash_base)
6595                 or die_error(404, "Commit not found");
6596         my $ftype = "blob";
6597         if (!defined $hash) {
6598                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6599                         or die_error(404, "Error looking up file");
6600         } else {
6601                 $ftype = git_get_type($hash);
6602                 if ($ftype !~ "blob") {
6603                         die_error(400, "Object is not a blob");
6604                 }
6605         }
6606
6607         my $fd;
6608         if ($format eq 'incremental') {
6609                 # get file contents (as base)
6610                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6611                         or die_error(500, "Open git-cat-file failed");
6612         } elsif ($format eq 'data') {
6613                 # run git-blame --incremental
6614                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6615                         $hash_base, "--", $file_name
6616                         or die_error(500, "Open git-blame --incremental failed");
6617         } else {
6618                 # run git-blame --porcelain
6619                 open $fd, "-|", git_cmd(), "blame", '-p',
6620                         $hash_base, '--', $file_name
6621                         or die_error(500, "Open git-blame --porcelain failed");
6622         }
6623
6624         # incremental blame data returns early
6625         if ($format eq 'data') {
6626                 print $cgi->header(
6627                         -type=>"text/plain", -charset => "utf-8",
6628                         -status=> "200 OK");
6629                 local $| = 1; # output autoflush
6630                 while (my $line = <$fd>) {
6631                         print to_utf8($line);
6632                 }
6633                 close $fd
6634                         or print "ERROR $!\n";
6635
6636                 print 'END';
6637                 if (defined $t0 && gitweb_check_feature('timed')) {
6638                         print ' '.
6639                               tv_interval($t0, [ gettimeofday() ]).
6640                               ' '.$number_of_git_cmds;
6641                 }
6642                 print "\n";
6643
6644                 return;
6645         }
6646
6647         # page header
6648         git_header_html();
6649         my $formats_nav =
6650                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6651                         "blob") .
6652                 " | ";
6653         if ($format eq 'incremental') {
6654                 $formats_nav .=
6655                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6656                                 "blame") . " (non-incremental)";
6657         } else {
6658                 $formats_nav .=
6659                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6660                                 "blame") . " (incremental)";
6661         }
6662         $formats_nav .=
6663                 " | " .
6664                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6665                         "history") .
6666                 " | " .
6667                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6668                         "HEAD");
6669         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6670         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6671         git_print_page_path($file_name, $ftype, $hash_base);
6672
6673         # page body
6674         if ($format eq 'incremental') {
6675                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6676                       "This page requires JavaScript to run.\n Use ".
6677                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6678                               'this page').
6679                       " instead.\n".
6680                       "</b></center></div>\n</noscript>\n";
6681
6682                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6683         }
6684
6685         print qq!<div class="page_body">\n!;
6686         print qq!<div id="progress_info">... / ...</div>\n!
6687                 if ($format eq 'incremental');
6688         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6689               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6690               qq!<thead>\n!.
6691               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6692               qq!</thead>\n!.
6693               qq!<tbody>\n!;
6694
6695         my @rev_color = qw(light dark);
6696         my $num_colors = scalar(@rev_color);
6697         my $current_color = 0;
6698
6699         if ($format eq 'incremental') {
6700                 my $color_class = $rev_color[$current_color];
6701
6702                 #contents of a file
6703                 my $linenr = 0;
6704         LINE:
6705                 while (my $line = <$fd>) {
6706                         chomp $line;
6707                         $linenr++;
6708
6709                         print qq!<tr id="l$linenr" class="$color_class">!.
6710                               qq!<td class="sha1"><a href=""> </a></td>!.
6711                               qq!<td class="linenr">!.
6712                               qq!<a class="linenr" href="">$linenr</a></td>!;
6713                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6714                         print qq!</tr>\n!;
6715                 }
6716
6717         } else { # porcelain, i.e. ordinary blame
6718                 my %metainfo = (); # saves information about commits
6719
6720                 # blame data
6721         LINE:
6722                 while (my $line = <$fd>) {
6723                         chomp $line;
6724                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6725                         # no <lines in group> for subsequent lines in group of lines
6726                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6727                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6728                         if (!exists $metainfo{$full_rev}) {
6729                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6730                         }
6731                         my $meta = $metainfo{$full_rev};
6732                         my $data;
6733                         while ($data = <$fd>) {
6734                                 chomp $data;
6735                                 last if ($data =~ s/^\t//); # contents of line
6736                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6737                                         $meta->{$1} = $2 unless exists $meta->{$1};
6738                                 }
6739                                 if ($data =~ /^previous /) {
6740                                         $meta->{'nprevious'}++;
6741                                 }
6742                         }
6743                         my $short_rev = substr($full_rev, 0, 8);
6744                         my $author = $meta->{'author'};
6745                         my %date =
6746                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6747                         my $date = $date{'iso-tz'};
6748                         if ($group_size) {
6749                                 $current_color = ($current_color + 1) % $num_colors;
6750                         }
6751                         my $tr_class = $rev_color[$current_color];
6752                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6753                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6754                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6755                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6756                         if ($group_size) {
6757                                 print "<td class=\"sha1\"";
6758                                 print " title=\"". esc_html($author) . ", $date\"";
6759                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6760                                 print ">";
6761                                 print $cgi->a({-href => href(action=>"commit",
6762                                                              hash=>$full_rev,
6763                                                              file_name=>$file_name)},
6764                                               esc_html($short_rev));
6765                                 if ($group_size >= 2) {
6766                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6767                                         if (@author_initials) {
6768                                                 print "<br />" .
6769                                                       esc_html(join('', @author_initials));
6770                                                 #           or join('.', ...)
6771                                         }
6772                                 }
6773                                 print "</td>\n";
6774                         }
6775                         # 'previous' <sha1 of parent commit> <filename at commit>
6776                         if (exists $meta->{'previous'} &&
6777                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6778                                 $meta->{'parent'} = $1;
6779                                 $meta->{'file_parent'} = unquote($2);
6780                         }
6781                         my $linenr_commit =
6782                                 exists($meta->{'parent'}) ?
6783                                 $meta->{'parent'} : $full_rev;
6784                         my $linenr_filename =
6785                                 exists($meta->{'file_parent'}) ?
6786                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6787                         my $blamed = href(action => 'blame',
6788                                           file_name => $linenr_filename,
6789                                           hash_base => $linenr_commit);
6790                         print "<td class=\"linenr\">";
6791                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6792                                         -class => "linenr" },
6793                                       esc_html($lineno));
6794                         print "</td>";
6795                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6796                         print "</tr>\n";
6797                 } # end while
6798
6799         }
6800
6801         # footer
6802         print "</tbody>\n".
6803               "</table>\n"; # class="blame"
6804         print "</div>\n";   # class="blame_body"
6805         close $fd
6806                 or print "Reading blob failed\n";
6807
6808         git_footer_html();
6809 }
6810
6811 sub git_blame {
6812         git_blame_common();
6813 }
6814
6815 sub git_blame_incremental {
6816         git_blame_common('incremental');
6817 }
6818
6819 sub git_blame_data {
6820         git_blame_common('data');
6821 }
6822
6823 sub git_tags {
6824         my $head = git_get_head_hash($project);
6825         git_header_html();
6826         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6827         git_print_header_div('summary', $project);
6828
6829         my @tagslist = git_get_tags_list();
6830         if (@tagslist) {
6831                 git_tags_body(\@tagslist);
6832         }
6833         git_footer_html();
6834 }
6835
6836 sub git_heads {
6837         my $head = git_get_head_hash($project);
6838         git_header_html();
6839         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6840         git_print_header_div('summary', $project);
6841
6842         my @headslist = git_get_heads_list();
6843         if (@headslist) {
6844                 git_heads_body(\@headslist, $head);
6845         }
6846         git_footer_html();
6847 }
6848
6849 # used both for single remote view and for list of all the remotes
6850 sub git_remotes {
6851         gitweb_check_feature('remote_heads')
6852                 or die_error(403, "Remote heads view is disabled");
6853
6854         my $head = git_get_head_hash($project);
6855         my $remote = $input_params{'hash'};
6856
6857         my $remotedata = git_get_remotes_list($remote);
6858         die_error(500, "Unable to get remote information") unless defined $remotedata;
6859
6860         unless (%$remotedata) {
6861                 die_error(404, defined $remote ?
6862                         "Remote $remote not found" :
6863                         "No remotes found");
6864         }
6865
6866         git_header_html(undef, undef, -action_extra => $remote);
6867         git_print_page_nav('', '',  $head, undef, $head,
6868                 format_ref_views($remote ? '' : 'remotes'));
6869
6870         fill_remote_heads($remotedata);
6871         if (defined $remote) {
6872                 git_print_header_div('remotes', "$remote remote for $project");
6873                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6874         } else {
6875                 git_print_header_div('summary', "$project remotes");
6876                 git_remotes_body($remotedata, undef, $head);
6877         }
6878
6879         git_footer_html();
6880 }
6881
6882 sub git_blob_plain {
6883         my $type = shift;
6884         my $expires;
6885
6886         if (!defined $hash) {
6887                 if (defined $file_name) {
6888                         my $base = $hash_base || git_get_head_hash($project);
6889                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6890                                 or die_error(404, "Cannot find file");
6891                 } else {
6892                         die_error(400, "No file name defined");
6893                 }
6894         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6895                 # blobs defined by non-textual hash id's can be cached
6896                 $expires = "+1d";
6897         }
6898
6899         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6900                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6901
6902         # content-type (can include charset)
6903         $type = blob_contenttype($fd, $file_name, $type);
6904
6905         # "save as" filename, even when no $file_name is given
6906         my $save_as = "$hash";
6907         if (defined $file_name) {
6908                 $save_as = $file_name;
6909         } elsif ($type =~ m/^text\//) {
6910                 $save_as .= '.txt';
6911         }
6912
6913         # With XSS prevention on, blobs of all types except a few known safe
6914         # ones are served with "Content-Disposition: attachment" to make sure
6915         # they don't run in our security domain.  For certain image types,
6916         # blob view writes an <img> tag referring to blob_plain view, and we
6917         # want to be sure not to break that by serving the image as an
6918         # attachment (though Firefox 3 doesn't seem to care).
6919         my $sandbox = $prevent_xss &&
6920                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6921
6922         # serve text/* as text/plain
6923         if ($prevent_xss &&
6924             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6925              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6926                 my $rest = $1;
6927                 $rest = defined $rest ? $rest : '';
6928                 $type = "text/plain$rest";
6929         }
6930
6931         print $cgi->header(
6932                 -type => $type,
6933                 -expires => $expires,
6934                 -content_disposition =>
6935                         ($sandbox ? 'attachment' : 'inline')
6936                         . '; filename="' . $save_as . '"');
6937         local $/ = undef;
6938         binmode STDOUT, ':raw';
6939         print <$fd>;
6940         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6941         close $fd;
6942 }
6943
6944 sub git_blob {
6945         my $expires;
6946
6947         if (!defined $hash) {
6948                 if (defined $file_name) {
6949                         my $base = $hash_base || git_get_head_hash($project);
6950                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6951                                 or die_error(404, "Cannot find file");
6952                 } else {
6953                         die_error(400, "No file name defined");
6954                 }
6955         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6956                 # blobs defined by non-textual hash id's can be cached
6957                 $expires = "+1d";
6958         }
6959
6960         my $have_blame = gitweb_check_feature('blame');
6961         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6962                 or die_error(500, "Couldn't cat $file_name, $hash");
6963         my $mimetype = blob_mimetype($fd, $file_name);
6964         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6965         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6966                 close $fd;
6967                 return git_blob_plain($mimetype);
6968         }
6969         # we can have blame only for text/* mimetype
6970         $have_blame &&= ($mimetype =~ m!^text/!);
6971
6972         my $highlight = gitweb_check_feature('highlight');
6973         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6974         $fd = run_highlighter($fd, $highlight, $syntax)
6975                 if $syntax;
6976
6977         git_header_html(undef, $expires);
6978         my $formats_nav = '';
6979         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6980                 if (defined $file_name) {
6981                         if ($have_blame) {
6982                                 $formats_nav .=
6983                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6984                                                 "blame") .
6985                                         " | ";
6986                         }
6987                         $formats_nav .=
6988                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6989                                         "history") .
6990                                 " | " .
6991                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6992                                         "raw") .
6993                                 " | " .
6994                                 $cgi->a({-href => href(action=>"blob",
6995                                                        hash_base=>"HEAD", file_name=>$file_name)},
6996                                         "HEAD");
6997                 } else {
6998                         $formats_nav .=
6999                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7000                                         "raw");
7001                 }
7002                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7003                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7004         } else {
7005                 print "<div class=\"page_nav\">\n" .
7006                       "<br/><br/></div>\n" .
7007                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7008         }
7009         git_print_page_path($file_name, "blob", $hash_base);
7010         print "<div class=\"page_body\">\n";
7011         if ($mimetype =~ m!^image/!) {
7012                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7013                 if ($file_name) {
7014                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7015                 }
7016                 print qq! src="! .
7017                       href(action=>"blob_plain", hash=>$hash,
7018                            hash_base=>$hash_base, file_name=>$file_name) .
7019                       qq!" />\n!;
7020         } else {
7021                 my $nr;
7022                 while (my $line = <$fd>) {
7023                         chomp $line;
7024                         $nr++;
7025                         $line = untabify($line);
7026                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7027                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7028                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7029                 }
7030         }
7031         close $fd
7032                 or print "Reading blob failed.\n";
7033         print "</div>";
7034         git_footer_html();
7035 }
7036
7037 sub git_tree {
7038         if (!defined $hash_base) {
7039                 $hash_base = "HEAD";
7040         }
7041         if (!defined $hash) {
7042                 if (defined $file_name) {
7043                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7044                 } else {
7045                         $hash = $hash_base;
7046                 }
7047         }
7048         die_error(404, "No such tree") unless defined($hash);
7049
7050         my $show_sizes = gitweb_check_feature('show-sizes');
7051         my $have_blame = gitweb_check_feature('blame');
7052
7053         my @entries = ();
7054         {
7055                 local $/ = "\0";
7056                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7057                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7058                         or die_error(500, "Open git-ls-tree failed");
7059                 @entries = map { chomp; $_ } <$fd>;
7060                 close $fd
7061                         or die_error(404, "Reading tree failed");
7062         }
7063
7064         my $refs = git_get_references();
7065         my $ref = format_ref_marker($refs, $hash_base);
7066         git_header_html();
7067         my $basedir = '';
7068         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7069                 my @views_nav = ();
7070                 if (defined $file_name) {
7071                         push @views_nav,
7072                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7073                                         "history"),
7074                                 $cgi->a({-href => href(action=>"tree",
7075                                                        hash_base=>"HEAD", file_name=>$file_name)},
7076                                         "HEAD"),
7077                 }
7078                 my $snapshot_links = format_snapshot_links($hash);
7079                 if (defined $snapshot_links) {
7080                         # FIXME: Should be available when we have no hash base as well.
7081                         push @views_nav, $snapshot_links;
7082                 }
7083                 git_print_page_nav('tree','', $hash_base, undef, undef,
7084                                    join(' | ', @views_nav));
7085                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7086         } else {
7087                 undef $hash_base;
7088                 print "<div class=\"page_nav\">\n";
7089                 print "<br/><br/></div>\n";
7090                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7091         }
7092         if (defined $file_name) {
7093                 $basedir = $file_name;
7094                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7095                         $basedir .= '/';
7096                 }
7097                 git_print_page_path($file_name, 'tree', $hash_base);
7098         }
7099         print "<div class=\"page_body\">\n";
7100         print "<table class=\"tree\">\n";
7101         my $alternate = 1;
7102         # '..' (top directory) link if possible
7103         if (defined $hash_base &&
7104             defined $file_name && $file_name =~ m![^/]+$!) {
7105                 if ($alternate) {
7106                         print "<tr class=\"dark\">\n";
7107                 } else {
7108                         print "<tr class=\"light\">\n";
7109                 }
7110                 $alternate ^= 1;
7111
7112                 my $up = $file_name;
7113                 $up =~ s!/?[^/]+$!!;
7114                 undef $up unless $up;
7115                 # based on git_print_tree_entry
7116                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7117                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7118                 print '<td class="list">';
7119                 print $cgi->a({-href => href(action=>"tree",
7120                                              hash_base=>$hash_base,
7121                                              file_name=>$up)},
7122                               "..");
7123                 print "</td>\n";
7124                 print "<td class=\"link\"></td>\n";
7125
7126                 print "</tr>\n";
7127         }
7128         foreach my $line (@entries) {
7129                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7130
7131                 if ($alternate) {
7132                         print "<tr class=\"dark\">\n";
7133                 } else {
7134                         print "<tr class=\"light\">\n";
7135                 }
7136                 $alternate ^= 1;
7137
7138                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7139
7140                 print "</tr>\n";
7141         }
7142         print "</table>\n" .
7143               "</div>";
7144         git_footer_html();
7145 }
7146
7147 sub snapshot_name {
7148         my ($project, $hash) = @_;
7149
7150         # path/to/project.git  -> project
7151         # path/to/project/.git -> project
7152         my $name = to_utf8($project);
7153         $name =~ s,([^/])/*\.git$,$1,;
7154         $name = basename($name);
7155         # sanitize name
7156         $name =~ s/[[:cntrl:]]/?/g;
7157
7158         my $ver = $hash;
7159         if ($hash =~ /^[0-9a-fA-F]+$/) {
7160                 # shorten SHA-1 hash
7161                 my $full_hash = git_get_full_hash($project, $hash);
7162                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7163                         $ver = git_get_short_hash($project, $hash);
7164                 }
7165         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7166                 # tags don't need shortened SHA-1 hash
7167                 $ver = $1;
7168         } else {
7169                 # branches and other need shortened SHA-1 hash
7170                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7171                         $ver = $1;
7172                 }
7173                 $ver .= '-' . git_get_short_hash($project, $hash);
7174         }
7175         # in case of hierarchical branch names
7176         $ver =~ s!/!.!g;
7177
7178         # name = project-version_string
7179         $name = "$name-$ver";
7180
7181         return wantarray ? ($name, $name) : $name;
7182 }
7183
7184 sub exit_if_unmodified_since {
7185         my ($latest_epoch) = @_;
7186         our $cgi;
7187
7188         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7189         if (defined $if_modified) {
7190                 my $since;
7191                 if (eval { require HTTP::Date; 1; }) {
7192                         $since = HTTP::Date::str2time($if_modified);
7193                 } elsif (eval { require Time::ParseDate; 1; }) {
7194                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7195                 }
7196                 if (defined $since && $latest_epoch <= $since) {
7197                         my %latest_date = parse_date($latest_epoch);
7198                         print $cgi->header(
7199                                 -last_modified => $latest_date{'rfc2822'},
7200                                 -status => '304 Not Modified');
7201                         goto DONE_GITWEB;
7202                 }
7203         }
7204 }
7205
7206 sub git_snapshot {
7207         my $format = $input_params{'snapshot_format'};
7208         if (!@snapshot_fmts) {
7209                 die_error(403, "Snapshots not allowed");
7210         }
7211         # default to first supported snapshot format
7212         $format ||= $snapshot_fmts[0];
7213         if ($format !~ m/^[a-z0-9]+$/) {
7214                 die_error(400, "Invalid snapshot format parameter");
7215         } elsif (!exists($known_snapshot_formats{$format})) {
7216                 die_error(400, "Unknown snapshot format");
7217         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7218                 die_error(403, "Snapshot format not allowed");
7219         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7220                 die_error(403, "Unsupported snapshot format");
7221         }
7222
7223         my $type = git_get_type("$hash^{}");
7224         if (!$type) {
7225                 die_error(404, 'Object does not exist');
7226         }  elsif ($type eq 'blob') {
7227                 die_error(400, 'Object is not a tree-ish');
7228         }
7229
7230         my ($name, $prefix) = snapshot_name($project, $hash);
7231         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7232
7233         my %co = parse_commit($hash);
7234         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7235
7236         my $cmd = quote_command(
7237                 git_cmd(), 'archive',
7238                 "--format=$known_snapshot_formats{$format}{'format'}",
7239                 "--prefix=$prefix/", $hash);
7240         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7241                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7242         }
7243
7244         $filename =~ s/(["\\])/\\$1/g;
7245         my %latest_date;
7246         if (%co) {
7247                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7248         }
7249
7250         print $cgi->header(
7251                 -type => $known_snapshot_formats{$format}{'type'},
7252                 -content_disposition => 'inline; filename="' . $filename . '"',
7253                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7254                 -status => '200 OK');
7255
7256         open my $fd, "-|", $cmd
7257                 or die_error(500, "Execute git-archive failed");
7258         binmode STDOUT, ':raw';
7259         print <$fd>;
7260         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7261         close $fd;
7262 }
7263
7264 sub git_log_generic {
7265         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7266
7267         my $head = git_get_head_hash($project);
7268         if (!defined $base) {
7269                 $base = $head;
7270         }
7271         if (!defined $page) {
7272                 $page = 0;
7273         }
7274         my $refs = git_get_references();
7275
7276         my $commit_hash = $base;
7277         if (defined $parent) {
7278                 $commit_hash = "$parent..$base";
7279         }
7280         my @commitlist =
7281                 parse_commits($commit_hash, 101, (100 * $page),
7282                               defined $file_name ? ($file_name, "--full-history") : ());
7283
7284         my $ftype;
7285         if (!defined $file_hash && defined $file_name) {
7286                 # some commits could have deleted file in question,
7287                 # and not have it in tree, but one of them has to have it
7288                 for (my $i = 0; $i < @commitlist; $i++) {
7289                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7290                         last if defined $file_hash;
7291                 }
7292         }
7293         if (defined $file_hash) {
7294                 $ftype = git_get_type($file_hash);
7295         }
7296         if (defined $file_name && !defined $ftype) {
7297                 die_error(500, "Unknown type of object");
7298         }
7299         my %co;
7300         if (defined $file_name) {
7301                 %co = parse_commit($base)
7302                         or die_error(404, "Unknown commit object");
7303         }
7304
7305
7306         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7307         my $next_link = '';
7308         if ($#commitlist >= 100) {
7309                 $next_link =
7310                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7311                                  -accesskey => "n", -title => "Alt-n"}, "next");
7312         }
7313         my $patch_max = gitweb_get_feature('patches');
7314         if ($patch_max && !defined $file_name) {
7315                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7316                         $paging_nav .= " &sdot; " .
7317                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7318                                         "patches");
7319                 }
7320         }
7321
7322         git_header_html();
7323         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7324         if (defined $file_name) {
7325                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7326         } else {
7327                 git_print_header_div('summary', $project)
7328         }
7329         git_print_page_path($file_name, $ftype, $hash_base)
7330                 if (defined $file_name);
7331
7332         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7333                      $file_name, $file_hash, $ftype);
7334
7335         git_footer_html();
7336 }
7337
7338 sub git_log {
7339         git_log_generic('log', \&git_log_body,
7340                         $hash, $hash_parent);
7341 }
7342
7343 sub git_commit {
7344         $hash ||= $hash_base || "HEAD";
7345         my %co = parse_commit($hash)
7346             or die_error(404, "Unknown commit object");
7347
7348         my $parent  = $co{'parent'};
7349         my $parents = $co{'parents'}; # listref
7350
7351         # we need to prepare $formats_nav before any parameter munging
7352         my $formats_nav;
7353         if (!defined $parent) {
7354                 # --root commitdiff
7355                 $formats_nav .= '(initial)';
7356         } elsif (@$parents == 1) {
7357                 # single parent commit
7358                 $formats_nav .=
7359                         '(parent: ' .
7360                         $cgi->a({-href => href(action=>"commit",
7361                                                hash=>$parent)},
7362                                 esc_html(substr($parent, 0, 7))) .
7363                         ')';
7364         } else {
7365                 # merge commit
7366                 $formats_nav .=
7367                         '(merge: ' .
7368                         join(' ', map {
7369                                 $cgi->a({-href => href(action=>"commit",
7370                                                        hash=>$_)},
7371                                         esc_html(substr($_, 0, 7)));
7372                         } @$parents ) .
7373                         ')';
7374         }
7375         if (gitweb_check_feature('patches') && @$parents <= 1) {
7376                 $formats_nav .= " | " .
7377                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7378                                 "patch");
7379         }
7380
7381         if (!defined $parent) {
7382                 $parent = "--root";
7383         }
7384         my @difftree;
7385         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7386                 @diff_opts,
7387                 (@$parents <= 1 ? $parent : '-c'),
7388                 $hash, "--"
7389                 or die_error(500, "Open git-diff-tree failed");
7390         @difftree = map { chomp; $_ } <$fd>;
7391         close $fd or die_error(404, "Reading git-diff-tree failed");
7392
7393         # non-textual hash id's can be cached
7394         my $expires;
7395         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7396                 $expires = "+1d";
7397         }
7398         my $refs = git_get_references();
7399         my $ref = format_ref_marker($refs, $co{'id'});
7400
7401         git_header_html(undef, $expires);
7402         git_print_page_nav('commit', '',
7403                            $hash, $co{'tree'}, $hash,
7404                            $formats_nav);
7405
7406         if (defined $co{'parent'}) {
7407                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7408         } else {
7409                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7410         }
7411         print "<div class=\"title_text\">\n" .
7412               "<table class=\"object_header\">\n";
7413         git_print_authorship_rows(\%co);
7414         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7415         print "<tr>" .
7416               "<td>tree</td>" .
7417               "<td class=\"sha1\">" .
7418               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7419                        class => "list"}, $co{'tree'}) .
7420               "</td>" .
7421               "<td class=\"link\">" .
7422               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7423                       "tree");
7424         my $snapshot_links = format_snapshot_links($hash);
7425         if (defined $snapshot_links) {
7426                 print " | " . $snapshot_links;
7427         }
7428         print "</td>" .
7429               "</tr>\n";
7430
7431         foreach my $par (@$parents) {
7432                 print "<tr>" .
7433                       "<td>parent</td>" .
7434                       "<td class=\"sha1\">" .
7435                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7436                                class => "list"}, $par) .
7437                       "</td>" .
7438                       "<td class=\"link\">" .
7439                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7440                       " | " .
7441                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7442                       "</td>" .
7443                       "</tr>\n";
7444         }
7445         print "</table>".
7446               "</div>\n";
7447
7448         print "<div class=\"page_body\">\n";
7449         git_print_log($co{'comment'});
7450         print "</div>\n";
7451
7452         git_difftree_body(\@difftree, $hash, @$parents);
7453
7454         git_footer_html();
7455 }
7456
7457 sub git_object {
7458         # object is defined by:
7459         # - hash or hash_base alone
7460         # - hash_base and file_name
7461         my $type;
7462
7463         # - hash or hash_base alone
7464         if ($hash || ($hash_base && !defined $file_name)) {
7465                 my $object_id = $hash || $hash_base;
7466
7467                 open my $fd, "-|", quote_command(
7468                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7469                         or die_error(404, "Object does not exist");
7470                 $type = <$fd>;
7471                 chomp $type;
7472                 close $fd
7473                         or die_error(404, "Object does not exist");
7474
7475         # - hash_base and file_name
7476         } elsif ($hash_base && defined $file_name) {
7477                 $file_name =~ s,/+$,,;
7478
7479                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7480                         or die_error(404, "Base object does not exist");
7481
7482                 # here errors should not hapen
7483                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7484                         or die_error(500, "Open git-ls-tree failed");
7485                 my $line = <$fd>;
7486                 close $fd;
7487
7488                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7489                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7490                         die_error(404, "File or directory for given base does not exist");
7491                 }
7492                 $type = $2;
7493                 $hash = $3;
7494         } else {
7495                 die_error(400, "Not enough information to find object");
7496         }
7497
7498         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7499                                           hash=>$hash, hash_base=>$hash_base,
7500                                           file_name=>$file_name),
7501                              -status => '302 Found');
7502 }
7503
7504 sub git_blobdiff {
7505         my $format = shift || 'html';
7506         my $diff_style = $input_params{'diff_style'} || 'inline';
7507
7508         my $fd;
7509         my @difftree;
7510         my %diffinfo;
7511         my $expires;
7512
7513         # preparing $fd and %diffinfo for git_patchset_body
7514         # new style URI
7515         if (defined $hash_base && defined $hash_parent_base) {
7516                 if (defined $file_name) {
7517                         # read raw output
7518                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7519                                 $hash_parent_base, $hash_base,
7520                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7521                                 or die_error(500, "Open git-diff-tree failed");
7522                         @difftree = map { chomp; $_ } <$fd>;
7523                         close $fd
7524                                 or die_error(404, "Reading git-diff-tree failed");
7525                         @difftree
7526                                 or die_error(404, "Blob diff not found");
7527
7528                 } elsif (defined $hash &&
7529                          $hash =~ /[0-9a-fA-F]{40}/) {
7530                         # try to find filename from $hash
7531
7532                         # read filtered raw output
7533                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7534                                 $hash_parent_base, $hash_base, "--"
7535                                 or die_error(500, "Open git-diff-tree failed");
7536                         @difftree =
7537                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7538                                 # $hash == to_id
7539                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7540                                 map { chomp; $_ } <$fd>;
7541                         close $fd
7542                                 or die_error(404, "Reading git-diff-tree failed");
7543                         @difftree
7544                                 or die_error(404, "Blob diff not found");
7545
7546                 } else {
7547                         die_error(400, "Missing one of the blob diff parameters");
7548                 }
7549
7550                 if (@difftree > 1) {
7551                         die_error(400, "Ambiguous blob diff specification");
7552                 }
7553
7554                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7555                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7556                 $file_name   ||= $diffinfo{'to_file'};
7557
7558                 $hash_parent ||= $diffinfo{'from_id'};
7559                 $hash        ||= $diffinfo{'to_id'};
7560
7561                 # non-textual hash id's can be cached
7562                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7563                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7564                         $expires = '+1d';
7565                 }
7566
7567                 # open patch output
7568                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7569                         '-p', ($format eq 'html' ? "--full-index" : ()),
7570                         $hash_parent_base, $hash_base,
7571                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7572                         or die_error(500, "Open git-diff-tree failed");
7573         }
7574
7575         # old/legacy style URI -- not generated anymore since 1.4.3.
7576         if (!%diffinfo) {
7577                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7578         }
7579
7580         # header
7581         if ($format eq 'html') {
7582                 my $formats_nav =
7583                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7584                                 "raw");
7585                 $formats_nav .= diff_style_nav($diff_style);
7586                 git_header_html(undef, $expires);
7587                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7588                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7589                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7590                 } else {
7591                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7592                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7593                 }
7594                 if (defined $file_name) {
7595                         git_print_page_path($file_name, "blob", $hash_base);
7596                 } else {
7597                         print "<div class=\"page_path\"></div>\n";
7598                 }
7599
7600         } elsif ($format eq 'plain') {
7601                 print $cgi->header(
7602                         -type => 'text/plain',
7603                         -charset => 'utf-8',
7604                         -expires => $expires,
7605                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7606
7607                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7608
7609         } else {
7610                 die_error(400, "Unknown blobdiff format");
7611         }
7612
7613         # patch
7614         if ($format eq 'html') {
7615                 print "<div class=\"page_body\">\n";
7616
7617                 git_patchset_body($fd, $diff_style,
7618                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7619                 close $fd;
7620
7621                 print "</div>\n"; # class="page_body"
7622                 git_footer_html();
7623
7624         } else {
7625                 while (my $line = <$fd>) {
7626                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7627                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7628
7629                         print $line;
7630
7631                         last if $line =~ m!^\+\+\+!;
7632                 }
7633                 local $/ = undef;
7634                 print <$fd>;
7635                 close $fd;
7636         }
7637 }
7638
7639 sub git_blobdiff_plain {
7640         git_blobdiff('plain');
7641 }
7642
7643 # assumes that it is added as later part of already existing navigation,
7644 # so it returns "| foo | bar" rather than just "foo | bar"
7645 sub diff_style_nav {
7646         my ($diff_style, $is_combined) = @_;
7647         $diff_style ||= 'inline';
7648
7649         return "" if ($is_combined);
7650
7651         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7652         my %styles = @styles;
7653         @styles =
7654                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7655
7656         return join '',
7657                 map { " | ".$_ }
7658                 map {
7659                         $_ eq $diff_style ? $styles{$_} :
7660                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7661                 } @styles;
7662 }
7663
7664 sub git_commitdiff {
7665         my %params = @_;
7666         my $format = $params{-format} || 'html';
7667         my $diff_style = $input_params{'diff_style'} || 'inline';
7668
7669         my ($patch_max) = gitweb_get_feature('patches');
7670         if ($format eq 'patch') {
7671                 die_error(403, "Patch view not allowed") unless $patch_max;
7672         }
7673
7674         $hash ||= $hash_base || "HEAD";
7675         my %co = parse_commit($hash)
7676             or die_error(404, "Unknown commit object");
7677
7678         # choose format for commitdiff for merge
7679         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7680                 $hash_parent = '--cc';
7681         }
7682         # we need to prepare $formats_nav before almost any parameter munging
7683         my $formats_nav;
7684         if ($format eq 'html') {
7685                 $formats_nav =
7686                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7687                                 "raw");
7688                 if ($patch_max && @{$co{'parents'}} <= 1) {
7689                         $formats_nav .= " | " .
7690                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7691                                         "patch");
7692                 }
7693                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7694
7695                 if (defined $hash_parent &&
7696                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7697                         # commitdiff with two commits given
7698                         my $hash_parent_short = $hash_parent;
7699                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7700                                 $hash_parent_short = substr($hash_parent, 0, 7);
7701                         }
7702                         $formats_nav .=
7703                                 ' (from';
7704                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7705                                 if ($co{'parents'}[$i] eq $hash_parent) {
7706                                         $formats_nav .= ' parent ' . ($i+1);
7707                                         last;
7708                                 }
7709                         }
7710                         $formats_nav .= ': ' .
7711                                 $cgi->a({-href => href(-replay=>1,
7712                                                        hash=>$hash_parent, hash_base=>undef)},
7713                                         esc_html($hash_parent_short)) .
7714                                 ')';
7715                 } elsif (!$co{'parent'}) {
7716                         # --root commitdiff
7717                         $formats_nav .= ' (initial)';
7718                 } elsif (scalar @{$co{'parents'}} == 1) {
7719                         # single parent commit
7720                         $formats_nav .=
7721                                 ' (parent: ' .
7722                                 $cgi->a({-href => href(-replay=>1,
7723                                                        hash=>$co{'parent'}, hash_base=>undef)},
7724                                         esc_html(substr($co{'parent'}, 0, 7))) .
7725                                 ')';
7726                 } else {
7727                         # merge commit
7728                         if ($hash_parent eq '--cc') {
7729                                 $formats_nav .= ' | ' .
7730                                         $cgi->a({-href => href(-replay=>1,
7731                                                                hash=>$hash, hash_parent=>'-c')},
7732                                                 'combined');
7733                         } else { # $hash_parent eq '-c'
7734                                 $formats_nav .= ' | ' .
7735                                         $cgi->a({-href => href(-replay=>1,
7736                                                                hash=>$hash, hash_parent=>'--cc')},
7737                                                 'compact');
7738                         }
7739                         $formats_nav .=
7740                                 ' (merge: ' .
7741                                 join(' ', map {
7742                                         $cgi->a({-href => href(-replay=>1,
7743                                                                hash=>$_, hash_base=>undef)},
7744                                                 esc_html(substr($_, 0, 7)));
7745                                 } @{$co{'parents'}} ) .
7746                                 ')';
7747                 }
7748         }
7749
7750         my $hash_parent_param = $hash_parent;
7751         if (!defined $hash_parent_param) {
7752                 # --cc for multiple parents, --root for parentless
7753                 $hash_parent_param =
7754                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7755         }
7756
7757         # read commitdiff
7758         my $fd;
7759         my @difftree;
7760         if ($format eq 'html') {
7761                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7762                         "--no-commit-id", "--patch-with-raw", "--full-index",
7763                         $hash_parent_param, $hash, "--"
7764                         or die_error(500, "Open git-diff-tree failed");
7765
7766                 while (my $line = <$fd>) {
7767                         chomp $line;
7768                         # empty line ends raw part of diff-tree output
7769                         last unless $line;
7770                         push @difftree, scalar parse_difftree_raw_line($line);
7771                 }
7772
7773         } elsif ($format eq 'plain') {
7774                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7775                         '-p', $hash_parent_param, $hash, "--"
7776                         or die_error(500, "Open git-diff-tree failed");
7777         } elsif ($format eq 'patch') {
7778                 # For commit ranges, we limit the output to the number of
7779                 # patches specified in the 'patches' feature.
7780                 # For single commits, we limit the output to a single patch,
7781                 # diverging from the git-format-patch default.
7782                 my @commit_spec = ();
7783                 if ($hash_parent) {
7784                         if ($patch_max > 0) {
7785                                 push @commit_spec, "-$patch_max";
7786                         }
7787                         push @commit_spec, '-n', "$hash_parent..$hash";
7788                 } else {
7789                         if ($params{-single}) {
7790                                 push @commit_spec, '-1';
7791                         } else {
7792                                 if ($patch_max > 0) {
7793                                         push @commit_spec, "-$patch_max";
7794                                 }
7795                                 push @commit_spec, "-n";
7796                         }
7797                         push @commit_spec, '--root', $hash;
7798                 }
7799                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7800                         '--encoding=utf8', '--stdout', @commit_spec
7801                         or die_error(500, "Open git-format-patch failed");
7802         } else {
7803                 die_error(400, "Unknown commitdiff format");
7804         }
7805
7806         # non-textual hash id's can be cached
7807         my $expires;
7808         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7809                 $expires = "+1d";
7810         }
7811
7812         # write commit message
7813         if ($format eq 'html') {
7814                 my $refs = git_get_references();
7815                 my $ref = format_ref_marker($refs, $co{'id'});
7816
7817                 git_header_html(undef, $expires);
7818                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7819                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7820                 print "<div class=\"title_text\">\n" .
7821                       "<table class=\"object_header\">\n";
7822                 git_print_authorship_rows(\%co);
7823                 print "</table>".
7824                       "</div>\n";
7825                 print "<div class=\"page_body\">\n";
7826                 if (@{$co{'comment'}} > 1) {
7827                         print "<div class=\"log\">\n";
7828                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7829                         print "</div>\n"; # class="log"
7830                 }
7831
7832         } elsif ($format eq 'plain') {
7833                 my $refs = git_get_references("tags");
7834                 my $tagname = git_get_rev_name_tags($hash);
7835                 my $filename = basename($project) . "-$hash.patch";
7836
7837                 print $cgi->header(
7838                         -type => 'text/plain',
7839                         -charset => 'utf-8',
7840                         -expires => $expires,
7841                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7842                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7843                 print "From: " . to_utf8($co{'author'}) . "\n";
7844                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7845                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7846
7847                 print "X-Git-Tag: $tagname\n" if $tagname;
7848                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7849
7850                 foreach my $line (@{$co{'comment'}}) {
7851                         print to_utf8($line) . "\n";
7852                 }
7853                 print "---\n\n";
7854         } elsif ($format eq 'patch') {
7855                 my $filename = basename($project) . "-$hash.patch";
7856
7857                 print $cgi->header(
7858                         -type => 'text/plain',
7859                         -charset => 'utf-8',
7860                         -expires => $expires,
7861                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7862         }
7863
7864         # write patch
7865         if ($format eq 'html') {
7866                 my $use_parents = !defined $hash_parent ||
7867                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7868                 git_difftree_body(\@difftree, $hash,
7869                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7870                 print "<br/>\n";
7871
7872                 git_patchset_body($fd, $diff_style,
7873                                   \@difftree, $hash,
7874                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7875                 close $fd;
7876                 print "</div>\n"; # class="page_body"
7877                 git_footer_html();
7878
7879         } elsif ($format eq 'plain') {
7880                 local $/ = undef;
7881                 print <$fd>;
7882                 close $fd
7883                         or print "Reading git-diff-tree failed\n";
7884         } elsif ($format eq 'patch') {
7885                 local $/ = undef;
7886                 print <$fd>;
7887                 close $fd
7888                         or print "Reading git-format-patch failed\n";
7889         }
7890 }
7891
7892 sub git_commitdiff_plain {
7893         git_commitdiff(-format => 'plain');
7894 }
7895
7896 # format-patch-style patches
7897 sub git_patch {
7898         git_commitdiff(-format => 'patch', -single => 1);
7899 }
7900
7901 sub git_patches {
7902         git_commitdiff(-format => 'patch');
7903 }
7904
7905 sub git_history {
7906         git_log_generic('history', \&git_history_body,
7907                         $hash_base, $hash_parent_base,
7908                         $file_name, $hash);
7909 }
7910
7911 sub git_search {
7912         $searchtype ||= 'commit';
7913
7914         # check if appropriate features are enabled
7915         gitweb_check_feature('search')
7916                 or die_error(403, "Search is disabled");
7917         if ($searchtype eq 'pickaxe') {
7918                 # pickaxe may take all resources of your box and run for several minutes
7919                 # with every query - so decide by yourself how public you make this feature
7920                 gitweb_check_feature('pickaxe')
7921                         or die_error(403, "Pickaxe search is disabled");
7922         }
7923         if ($searchtype eq 'grep') {
7924                 # grep search might be potentially CPU-intensive, too
7925                 gitweb_check_feature('grep')
7926                         or die_error(403, "Grep search is disabled");
7927         }
7928
7929         if (!defined $searchtext) {
7930                 die_error(400, "Text field is empty");
7931         }
7932         if (!defined $hash) {
7933                 $hash = git_get_head_hash($project);
7934         }
7935         my %co = parse_commit($hash);
7936         if (!%co) {
7937                 die_error(404, "Unknown commit object");
7938         }
7939         if (!defined $page) {
7940                 $page = 0;
7941         }
7942
7943         if ($searchtype eq 'commit' ||
7944             $searchtype eq 'author' ||
7945             $searchtype eq 'committer') {
7946                 git_search_message(%co);
7947         } elsif ($searchtype eq 'pickaxe') {
7948                 git_search_changes(%co);
7949         } elsif ($searchtype eq 'grep') {
7950                 git_search_files(%co);
7951         } else {
7952                 die_error(400, "Unknown search type");
7953         }
7954 }
7955
7956 sub git_search_help {
7957         git_header_html();
7958         git_print_page_nav('','', $hash,$hash,$hash);
7959         print <<EOT;
7960 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7961 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7962 the pattern entered is recognized as the POSIX extended
7963 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7964 insensitive).</p>
7965 <dl>
7966 <dt><b>commit</b></dt>
7967 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7968 EOT
7969         my $have_grep = gitweb_check_feature('grep');
7970         if ($have_grep) {
7971                 print <<EOT;
7972 <dt><b>grep</b></dt>
7973 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7974     a different one) are searched for the given pattern. On large trees, this search can take
7975 a while and put some strain on the server, so please use it with some consideration. Note that
7976 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7977 case-sensitive.</dd>
7978 EOT
7979         }
7980         print <<EOT;
7981 <dt><b>author</b></dt>
7982 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7983 <dt><b>committer</b></dt>
7984 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7985 EOT
7986         my $have_pickaxe = gitweb_check_feature('pickaxe');
7987         if ($have_pickaxe) {
7988                 print <<EOT;
7989 <dt><b>pickaxe</b></dt>
7990 <dd>All commits that caused the string to appear or disappear from any file (changes that
7991 added, removed or "modified" the string) will be listed. This search can take a while and
7992 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7993 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7994 EOT
7995         }
7996         print "</dl>\n";
7997         git_footer_html();
7998 }
7999
8000 sub git_shortlog {
8001         git_log_generic('shortlog', \&git_shortlog_body,
8002                         $hash, $hash_parent);
8003 }
8004
8005 ## ......................................................................
8006 ## feeds (RSS, Atom; OPML)
8007
8008 sub git_feed {
8009         my $format = shift || 'atom';
8010         my $have_blame = gitweb_check_feature('blame');
8011
8012         # Atom: http://www.atomenabled.org/developers/syndication/
8013         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8014         if ($format ne 'rss' && $format ne 'atom') {
8015                 die_error(400, "Unknown web feed format");
8016         }
8017
8018         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8019         my $head = $hash || 'HEAD';
8020         my @commitlist = parse_commits($head, 150, 0, $file_name);
8021
8022         my %latest_commit;
8023         my %latest_date;
8024         my $content_type = "application/$format+xml";
8025         if (defined $cgi->http('HTTP_ACCEPT') &&
8026                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8027                 # browser (feed reader) prefers text/xml
8028                 $content_type = 'text/xml';
8029         }
8030         if (defined($commitlist[0])) {
8031                 %latest_commit = %{$commitlist[0]};
8032                 my $latest_epoch = $latest_commit{'committer_epoch'};
8033                 exit_if_unmodified_since($latest_epoch);
8034                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8035         }
8036         print $cgi->header(
8037                 -type => $content_type,
8038                 -charset => 'utf-8',
8039                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8040                 -status => '200 OK');
8041
8042         # Optimization: skip generating the body if client asks only
8043         # for Last-Modified date.
8044         return if ($cgi->request_method() eq 'HEAD');
8045
8046         # header variables
8047         my $title = "$site_name - $project/$action";
8048         my $feed_type = 'log';
8049         if (defined $hash) {
8050                 $title .= " - '$hash'";
8051                 $feed_type = 'branch log';
8052                 if (defined $file_name) {
8053                         $title .= " :: $file_name";
8054                         $feed_type = 'history';
8055                 }
8056         } elsif (defined $file_name) {
8057                 $title .= " - $file_name";
8058                 $feed_type = 'history';
8059         }
8060         $title .= " $feed_type";
8061         my $descr = git_get_project_description($project);
8062         if (defined $descr) {
8063                 $descr = esc_html($descr);
8064         } else {
8065                 $descr = "$project " .
8066                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8067                          " feed";
8068         }
8069         my $owner = git_get_project_owner($project);
8070         $owner = esc_html($owner);
8071
8072         #header
8073         my $alt_url;
8074         if (defined $file_name) {
8075                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8076         } elsif (defined $hash) {
8077                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8078         } else {
8079                 $alt_url = href(-full=>1, action=>"summary");
8080         }
8081         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8082         if ($format eq 'rss') {
8083                 print <<XML;
8084 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8085 <channel>
8086 XML
8087                 print "<title>$title</title>\n" .
8088                       "<link>$alt_url</link>\n" .
8089                       "<description>$descr</description>\n" .
8090                       "<language>en</language>\n" .
8091                       # project owner is responsible for 'editorial' content
8092                       "<managingEditor>$owner</managingEditor>\n";
8093                 if (defined $logo || defined $favicon) {
8094                         # prefer the logo to the favicon, since RSS
8095                         # doesn't allow both
8096                         my $img = esc_url($logo || $favicon);
8097                         print "<image>\n" .
8098                               "<url>$img</url>\n" .
8099                               "<title>$title</title>\n" .
8100                               "<link>$alt_url</link>\n" .
8101                               "</image>\n";
8102                 }
8103                 if (%latest_date) {
8104                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8105                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8106                 }
8107                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8108         } elsif ($format eq 'atom') {
8109                 print <<XML;
8110 <feed xmlns="http://www.w3.org/2005/Atom">
8111 XML
8112                 print "<title>$title</title>\n" .
8113                       "<subtitle>$descr</subtitle>\n" .
8114                       '<link rel="alternate" type="text/html" href="' .
8115                       $alt_url . '" />' . "\n" .
8116                       '<link rel="self" type="' . $content_type . '" href="' .
8117                       $cgi->self_url() . '" />' . "\n" .
8118                       "<id>" . href(-full=>1) . "</id>\n" .
8119                       # use project owner for feed author
8120                       "<author><name>$owner</name></author>\n";
8121                 if (defined $favicon) {
8122                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8123                 }
8124                 if (defined $logo) {
8125                         # not twice as wide as tall: 72 x 27 pixels
8126                         print "<logo>" . esc_url($logo) . "</logo>\n";
8127                 }
8128                 if (! %latest_date) {
8129                         # dummy date to keep the feed valid until commits trickle in:
8130                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8131                 } else {
8132                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8133                 }
8134                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8135         }
8136
8137         # contents
8138         for (my $i = 0; $i <= $#commitlist; $i++) {
8139                 my %co = %{$commitlist[$i]};
8140                 my $commit = $co{'id'};
8141                 # we read 150, we always show 30 and the ones more recent than 48 hours
8142                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8143                         last;
8144                 }
8145                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8146
8147                 # get list of changed files
8148                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8149                         $co{'parent'} || "--root",
8150                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8151                         or next;
8152                 my @difftree = map { chomp; $_ } <$fd>;
8153                 close $fd
8154                         or next;
8155
8156                 # print element (entry, item)
8157                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8158                 if ($format eq 'rss') {
8159                         print "<item>\n" .
8160                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8161                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8162                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8163                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8164                               "<link>$co_url</link>\n" .
8165                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8166                               "<content:encoded>" .
8167                               "<![CDATA[\n";
8168                 } elsif ($format eq 'atom') {
8169                         print "<entry>\n" .
8170                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8171                               "<updated>$cd{'iso-8601'}</updated>\n" .
8172                               "<author>\n" .
8173                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8174                         if ($co{'author_email'}) {
8175                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8176                         }
8177                         print "</author>\n" .
8178                               # use committer for contributor
8179                               "<contributor>\n" .
8180                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8181                         if ($co{'committer_email'}) {
8182                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8183                         }
8184                         print "</contributor>\n" .
8185                               "<published>$cd{'iso-8601'}</published>\n" .
8186                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8187                               "<id>$co_url</id>\n" .
8188                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8189                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8190                 }
8191                 my $comment = $co{'comment'};
8192                 print "<pre>\n";
8193                 foreach my $line (@$comment) {
8194                         $line = esc_html($line);
8195                         print "$line\n";
8196                 }
8197                 print "</pre><ul>\n";
8198                 foreach my $difftree_line (@difftree) {
8199                         my %difftree = parse_difftree_raw_line($difftree_line);
8200                         next if !$difftree{'from_id'};
8201
8202                         my $file = $difftree{'file'} || $difftree{'to_file'};
8203
8204                         print "<li>" .
8205                               "[" .
8206                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8207                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8208                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8209                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8210                                       -title => "diff"}, 'D');
8211                         if ($have_blame) {
8212                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8213                                                              file_name=>$file, hash_base=>$commit),
8214                                               -title => "blame"}, 'B');
8215                         }
8216                         # if this is not a feed of a file history
8217                         if (!defined $file_name || $file_name ne $file) {
8218                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8219                                                              file_name=>$file, hash=>$commit),
8220                                               -title => "history"}, 'H');
8221                         }
8222                         $file = esc_path($file);
8223                         print "] ".
8224                               "$file</li>\n";
8225                 }
8226                 if ($format eq 'rss') {
8227                         print "</ul>]]>\n" .
8228                               "</content:encoded>\n" .
8229                               "</item>\n";
8230                 } elsif ($format eq 'atom') {
8231                         print "</ul>\n</div>\n" .
8232                               "</content>\n" .
8233                               "</entry>\n";
8234                 }
8235         }
8236
8237         # end of feed
8238         if ($format eq 'rss') {
8239                 print "</channel>\n</rss>\n";
8240         } elsif ($format eq 'atom') {
8241                 print "</feed>\n";
8242         }
8243 }
8244
8245 sub git_rss {
8246         git_feed('rss');
8247 }
8248
8249 sub git_atom {
8250         git_feed('atom');
8251 }
8252
8253 sub git_opml {
8254         my @list = git_get_projects_list($project_filter, $strict_export);
8255         if (!@list) {
8256                 die_error(404, "No projects found");
8257         }
8258
8259         print $cgi->header(
8260                 -type => 'text/xml',
8261                 -charset => 'utf-8',
8262                 -content_disposition => 'inline; filename="opml.xml"');
8263
8264         my $title = esc_html($site_name);
8265         my $filter = " within subdirectory ";
8266         if (defined $project_filter) {
8267                 $filter .= esc_html($project_filter);
8268         } else {
8269                 $filter = "";
8270         }
8271         print <<XML;
8272 <?xml version="1.0" encoding="utf-8"?>
8273 <opml version="1.0">
8274 <head>
8275   <title>$title OPML Export$filter</title>
8276 </head>
8277 <body>
8278 <outline text="git RSS feeds">
8279 XML
8280
8281         foreach my $pr (@list) {
8282                 my %proj = %$pr;
8283                 my $head = git_get_head_hash($proj{'path'});
8284                 if (!defined $head) {
8285                         next;
8286                 }
8287                 $git_dir = "$projectroot/$proj{'path'}";
8288                 my %co = parse_commit($head);
8289                 if (!%co) {
8290                         next;
8291                 }
8292
8293                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8294                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8295                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8296                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8297         }
8298         print <<XML;
8299 </outline>
8300 </body>
8301 </opml>
8302 XML
8303 }